Cranes are the most used construction machinery nowadays, and they play an important role in the construction industry, port and dock loading and unloading of goods, and shipbuilding. Port cranes, grab cranes, cantilever cranes, gantry cranes, ship cranes, etc. each have their own advantages and are used in different occasions and play an important role.
A crane is a multi-action hoisting machine that vertically lifts and transports heavy objects horizontally within a certain range. Lifting machinery can be divided into light and small lifting equipment, lifts, cranes and overhead monorail systems according to different structures. Light and small lifting equipment mainly includes lifting blocks, spreaders, jacks, manual hoists, electric hoists and ordinary winches, most of which are small in size, light in weight and easy to use. They can be used alone, and some can also be used as lifting mechanisms for cranes.
There are many types of cranes, and their uses are also different, but they are all for the production and development of enterprises, to increase the speed of transporting goods, and to promote the development of the port economy. They also play an important role in the construction industry. Cranes involve many industries and are important mechanical equipment.
There are many crane manufacturers, but most small enterprises have not developed so well, and have even been eliminated by the society. Large and medium-sized crane enterprises have developed. Cranes are important machinery for engineering construction, and they are also widely used in port terminals. Port cranes are mainly used for handling, loading and unloading equipment, which promotes the development of port economy.
Some large-scale enterprises are introducing, digesting and absorbing the technologies and new methods of similar products from the world’s advanced industrial countries, popularizing and applying optimized design, designing towards modularization and generalization, and using fewer components to meet user needs to the greatest extent; The development of intelligence and information technology requires complete, systematic and large-scale development, the development of large-scale, high-efficiency, energy-saving, and special cranes to meet the requirements of product diversification, and effectively improve work efficiency and operational safety.
There are more and more crane companies, and the companies themselves must have a sense of crisis, seize market opportunities, strengthen the work of revising standards, and eliminate backward production capacity, which is conducive to participating in international competition and speeding up entry into the international market.
A crane is a multi-action hoisting machine that vertically lifts and transports heavy objects horizontally within a certain range. Lifting machinery can be divided into light and small lifting equipment, lifts, cranes and overhead monorail systems according to different structures. Light and small lifting equipment mainly includes lifting blocks, spreaders, jacks, manual hoists, electric hoists and ordinary winches, most of which are small in size, light in weight and easy to use. They can be used alone, and some can also be used as lifting mechanisms for cranes.
There are many types of cranes, and their uses are also different, but they are all for the production and development of enterprises, to increase the speed of transporting goods, and to promote the development of the port economy. They also play an important role in the construction industry. Cranes involve many industries and are important mechanical equipment.
There are many crane manufacturers, but most small enterprises have not developed so well, and have even been eliminated by the society. Large and medium-sized crane enterprises have developed. Cranes are important machinery for engineering construction, and they are also widely used in port terminals. Port cranes are mainly used for handling, loading and unloading equipment, which promotes the development of port economy.
Some large-scale enterprises are introducing, digesting and absorbing the technologies and new methods of similar products from the world’s advanced industrial countries, popularizing and applying optimized design, designing towards modularization and generalization, and using fewer components to meet user needs to the greatest extent; The development of intelligence and information technology requires complete, systematic and large-scale development, the development of large-scale, high-efficiency, energy-saving, and special cranes to meet the requirements of product diversification, and effectively improve work efficiency and operational safety.
There are more and more crane companies, and the companies themselves must have a sense of crisis, seize market opportunities, strengthen the work of revising standards, and eliminate backward production capacity, which is conducive to participating in international competition and speeding up entry into the international market.
The main modes of cargo transportation include railway, highway, water transportation, aviation, pipelines, etc., as well as a very important position of the port in the logistics service chain. The port is a center for the distribution of commodities and alternative points of transportation. The development of the port economy is closely related to the application of mechanical equipment. In the past, manual handling was carried out, but now they are all carried by machinery, which improves efficiency, saves time and labor, and speeds up economic development.
There are more and more types of port cranes, and the development of large-scale, special-purpose loading and unloading machinery meets the needs of the development of large-scale ships, bulk transportation and container transportation. For example, large quayside container cranes in ports, tire gantry cranes, reach stackers, high-productivity grab ship unloaders, etc. Standardization, serialization, standardization, the main performance parameters of standardization and serialization, and the main parts and components of large cranes will play an active role in improving productivity, reducing production costs, and improving product performance and maintenance.
The crane is composed of a variety of different parts, so the lifting parts have a great influence on the crane. In order to ensure the best effect when using the crane, the parts must maintain good performance, and the maintenance of different parts is not the same.
The lubrication of lifting accessories must be regularly checked and maintained in accordance with its lubrication instructions, and lubricated with matching lubricants to prevent serious wear of the parts during normal operation. The bearing device must achieve good results in terms of fixation. To achieve good results, the first thing to consider is its size. If it is worn out, it must be repaired in time. If it is worn out, it must be replaced. The crane industry reduces labor intensity, greatly improves labor efficiency, and reduces operating costs to better complete construction.
There are more and more types of port cranes, and the development of large-scale, special-purpose loading and unloading machinery meets the needs of the development of large-scale ships, bulk transportation and container transportation. For example, large quayside container cranes in ports, tire gantry cranes, reach stackers, high-productivity grab ship unloaders, etc. Standardization, serialization, standardization, the main performance parameters of standardization and serialization, and the main parts and components of large cranes will play an active role in improving productivity, reducing production costs, and improving product performance and maintenance.
The crane is composed of a variety of different parts, so the lifting parts have a great influence on the crane. In order to ensure the best effect when using the crane, the parts must maintain good performance, and the maintenance of different parts is not the same.
The lubrication of lifting accessories must be regularly checked and maintained in accordance with its lubrication instructions, and lubricated with matching lubricants to prevent serious wear of the parts during normal operation. The bearing device must achieve good results in terms of fixation. To achieve good results, the first thing to consider is its size. If it is worn out, it must be repaired in time. If it is worn out, it must be replaced. The crane industry reduces labor intensity, greatly improves labor efficiency, and reduces operating costs to better complete construction.
Lifting equipment is an important equipment to promote economic development, but in many cases, some crane accidents will be heard. Therefore, the safety of hoisting machinery needs to be paid attention to. Cranes bring convenience to people’s work, but pay attention to safety issues.
The safety of the crane should be done from the usual maintenance and overhaul. Before and after the crane is used, pay attention to check whether the equipment is operating normally, whether the relevant parts are installed in place, and also need to install some protection facilities, such as anti-collision devices, limit devices, etc., to protect the equipment and reduce damage to the equipment.
The operation of the crane equipment must be correct, and the operating rules must not be violated, and it must not be overloaded. In normal times, there may be some bad weather such as wind and rain, so protective measures should be taken. Some cables and cables are prone to aging, so the crane’s operating environment changes, and a full range of protection devices must be made to use them with confidence.
After opening to the outside world, wharfs and ports are important operating locations, and wharf construction is a natural interface connecting the hinterland and maritime transportation. It is a hub and hub for land and water transportation. The wharf is a place for ships to berth, load and unload cargo, get on and off passengers, and supplement supplies. In the old society, they were handled manually. Now the development of machinery and equipment, cranes play an important role, reducing manpower, improving efficiency, and promoting economic development.
The crane is an important equipment for handling, loading and unloading. The use of high-quality materials and advanced design improves the efficiency of loading and unloading. There are many types of cranes, and cranes dedicated to docks require professional skills. Nowadays, there are more and more exchanges between various places, and the demand for cranes is also increasing. In some places, multiple quay cranes are required to function at the same time. Therefore, cranes are important equipment for modern economic development.
The safety of the crane should be done from the usual maintenance and overhaul. Before and after the crane is used, pay attention to check whether the equipment is operating normally, whether the relevant parts are installed in place, and also need to install some protection facilities, such as anti-collision devices, limit devices, etc., to protect the equipment and reduce damage to the equipment.
The operation of the crane equipment must be correct, and the operating rules must not be violated, and it must not be overloaded. In normal times, there may be some bad weather such as wind and rain, so protective measures should be taken. Some cables and cables are prone to aging, so the crane’s operating environment changes, and a full range of protection devices must be made to use them with confidence.
After opening to the outside world, wharfs and ports are important operating locations, and wharf construction is a natural interface connecting the hinterland and maritime transportation. It is a hub and hub for land and water transportation. The wharf is a place for ships to berth, load and unload cargo, get on and off passengers, and supplement supplies. In the old society, they were handled manually. Now the development of machinery and equipment, cranes play an important role, reducing manpower, improving efficiency, and promoting economic development.
The crane is an important equipment for handling, loading and unloading. The use of high-quality materials and advanced design improves the efficiency of loading and unloading. There are many types of cranes, and cranes dedicated to docks require professional skills. Nowadays, there are more and more exchanges between various places, and the demand for cranes is also increasing. In some places, multiple quay cranes are required to function at the same time. Therefore, cranes are important equipment for modern economic development.
Cranes are important machinery for transporting materials, reducing labor and improving efficiency, and are important mechanical equipment that conforms to social development. With the increase of production scale and the further improvement of automation and intelligence, the role of cranes will become more obvious in enterprise production. At the same time, the continuous development of cranes meets the needs of hoisting requirements in performance. The modern design and manufacturing capacity of port cranes has been continuously improved, and the development trend is obvious.
Port cranes develop large-scale, special-purpose loading and unloading machinery to meet the development needs of large-scale transportation, bulk cargo loading and unloading, and container transportation. For example, large quayside container cranes in ports, tire gantry cranes, reach stackers, high-productivity grab ship unloaders, etc. There is a greater demand for new structures, new materials, new processes, and new transmission mechanisms. The combination of mechanical technology and electronic technology, combined with a single design and mechanized operating system, combines advanced microcomputer control, optical fiber technology, and hydraulic technology to mechanical The drive and control system improves the working performance of the crane.
The crane is an important machine for modern material handling. It has realized mechanical automation and increased the labor force. It has a great promotion effect on the development of my country’s engineering construction and economic construction. The crane is one of the widely used equipment now. There are many types of cranes, such as port cranes, single-beam cranes, marine cranes, etc., no matter what kind of lifting equipment, they are vulnerable, heavy and dangerous.
With the establishment of a large number of construction crane leasing companies, the market behavior of construction crane leasing has become more and more common, providing various options for construction companies to upgrade their engineering equipment. However, there are still many weak links and potential performance hazards, such as the shortage of management personnel of machinery and equipment, users and maintenance personnel, and the low quality of lifting machinery and equipment leasing companies, and the safe use and management of lifting machinery and equipment. Safety hazards. Establish a complete corporate management system, improve the quality of employees and their understanding of lifting equipment, and better manage and use these equipment.
Port cranes develop large-scale, special-purpose loading and unloading machinery to meet the development needs of large-scale transportation, bulk cargo loading and unloading, and container transportation. For example, large quayside container cranes in ports, tire gantry cranes, reach stackers, high-productivity grab ship unloaders, etc. There is a greater demand for new structures, new materials, new processes, and new transmission mechanisms. The combination of mechanical technology and electronic technology, combined with a single design and mechanized operating system, combines advanced microcomputer control, optical fiber technology, and hydraulic technology to mechanical The drive and control system improves the working performance of the crane.
The crane is an important machine for modern material handling. It has realized mechanical automation and increased the labor force. It has a great promotion effect on the development of my country’s engineering construction and economic construction. The crane is one of the widely used equipment now. There are many types of cranes, such as port cranes, single-beam cranes, marine cranes, etc., no matter what kind of lifting equipment, they are vulnerable, heavy and dangerous.
With the establishment of a large number of construction crane leasing companies, the market behavior of construction crane leasing has become more and more common, providing various options for construction companies to upgrade their engineering equipment. However, there are still many weak links and potential performance hazards, such as the shortage of management personnel of machinery and equipment, users and maintenance personnel, and the low quality of lifting machinery and equipment leasing companies, and the safe use and management of lifting machinery and equipment. Safety hazards. Establish a complete corporate management system, improve the quality of employees and their understanding of lifting equipment, and better manage and use these equipment.
Dock cranes mainly play an important role in handling and loading and unloading. Some of them cannot be handled manually and require mechanical equipment to improve efficiency. Wharf cranes are large-scale mechanical equipment, and some common problems will always occur during use, such as oil injection at the oil injection port of the hydraulic oil tank. When encountering this phenomenon, it is necessary to find the cause and deal with it in time.
There is a leak in the oil suction pipe of the quay crane or the oil seal of the oil pump is damaged, and the oil is injected into the oil injection port caused by the air mixed in the hydraulic oil. Check whether the diameter of the oil return port is too small. If it is necessary to increase the oil return port in time. The oil temperature in the hydraulic oil tank of the quay crane is too high. Take appropriate measures to lower the oil temperature or replace the hydraulic oil.
Problems should be checked and solved in time, and special attention should be paid to these aspects in use to avoid problems and prolong the service life. The production and development of quay cranes must conform to the development trend of the society, combined with the concept of energy conservation and environmental protection, to achieve sustainable development.
Generally, the safety of mechanical equipment in port terminals is of great concern to everyone, and the development of the port economy is inseparable from the role of these mechanical equipment. But in life, people often hear some safety accidents that make people’s creeps. Therefore, safety must be the first priority.
There are many factors affecting the safety of quay cranes. First of all, the quality of quay cranes and whether the equipment itself has potential safety hazards. The crane itself must be used with safety devices to reduce accidents and the quality must stand the test. First, there is no problem with the quality of the equipment itself, and then there are external factors, such as unstable voltage, incorrect operation, weather problems, etc., in many aspects.
Operators of quay cranes must be trained and capable of handling emergency tasks, and there must be no people around during the operation, especially under the crane. If it encounters strong wind and heavy rain, stop the operation to avoid unnecessary losses.
There is a leak in the oil suction pipe of the quay crane or the oil seal of the oil pump is damaged, and the oil is injected into the oil injection port caused by the air mixed in the hydraulic oil. Check whether the diameter of the oil return port is too small. If it is necessary to increase the oil return port in time. The oil temperature in the hydraulic oil tank of the quay crane is too high. Take appropriate measures to lower the oil temperature or replace the hydraulic oil.
Problems should be checked and solved in time, and special attention should be paid to these aspects in use to avoid problems and prolong the service life. The production and development of quay cranes must conform to the development trend of the society, combined with the concept of energy conservation and environmental protection, to achieve sustainable development.
Generally, the safety of mechanical equipment in port terminals is of great concern to everyone, and the development of the port economy is inseparable from the role of these mechanical equipment. But in life, people often hear some safety accidents that make people’s creeps. Therefore, safety must be the first priority.
There are many factors affecting the safety of quay cranes. First of all, the quality of quay cranes and whether the equipment itself has potential safety hazards. The crane itself must be used with safety devices to reduce accidents and the quality must stand the test. First, there is no problem with the quality of the equipment itself, and then there are external factors, such as unstable voltage, incorrect operation, weather problems, etc., in many aspects.
Operators of quay cranes must be trained and capable of handling emergency tasks, and there must be no people around during the operation, especially under the crane. If it encounters strong wind and heavy rain, stop the operation to avoid unnecessary losses.
Anti-rust work of quay cranes is essential
2021年3月18日 日常Dock cranes are generally used in docks. They work in the open air. They need to withstand wind and rain. In harsh environments, they must protect the dock cranes and reduce equipment losses. Among the many protection work, the anti-rust work of the dock crane is indispensable.
Where the paint film on the metal structure is damaged, the surface of the component should be cleaned up, and then painted with anti-rust paint and decorative paint film, which can reduce metal corrosion in rain and snow. In the movable parts of the crane, such as the connecting pin of the sling and the crane, the guide wheels, the wheels of the trolley, etc., rust prevention must be done carefully. Clean the surface of the parts first, and then lubricate these parts with No.-10 or No.-20 diesel oil to make an oil film on the metal surface, and then apply a layer of grease, but not too thick.
The anti-rust protection of the crane is indispensable. The crane is a frequently used equipment. Safety and reliability are the main ones. Only the good performance of some parts can ensure the reliable operation of the crane.
Now that there are more and more construction machinery, manpower can no longer meet the development needs of the society, and cannot keep up with the development of the times. Machinery and equipment are constantly being updated to keep up with the times, and so are port cranes.
Port cranes are used for port cargo transportation. They are all carefully designed and produced equipment, and their performance has been greatly improved. During the use of the crane, there will be some unexpected situations. For example, the wheels of the crane are easy to slip in rain, which affects the normal use. Port cranes are generally used outdoors, so this situation is often encountered, and this aspect should be paid attention to in the design of the crane. You can use anti-skid chains to fix on tires that are prone to slipping. This is to increase the friction between the tire and the ground, thereby reducing the chance of slipping.
Generally speaking, do not use the crane in rainy days, take good measures to prevent rain, pay attention to clear the rain before operation, keep the crane in good working condition, and ensure the safe and stable completion of the lifting task.
Where the paint film on the metal structure is damaged, the surface of the component should be cleaned up, and then painted with anti-rust paint and decorative paint film, which can reduce metal corrosion in rain and snow. In the movable parts of the crane, such as the connecting pin of the sling and the crane, the guide wheels, the wheels of the trolley, etc., rust prevention must be done carefully. Clean the surface of the parts first, and then lubricate these parts with No.-10 or No.-20 diesel oil to make an oil film on the metal surface, and then apply a layer of grease, but not too thick.
The anti-rust protection of the crane is indispensable. The crane is a frequently used equipment. Safety and reliability are the main ones. Only the good performance of some parts can ensure the reliable operation of the crane.
Now that there are more and more construction machinery, manpower can no longer meet the development needs of the society, and cannot keep up with the development of the times. Machinery and equipment are constantly being updated to keep up with the times, and so are port cranes.
Port cranes are used for port cargo transportation. They are all carefully designed and produced equipment, and their performance has been greatly improved. During the use of the crane, there will be some unexpected situations. For example, the wheels of the crane are easy to slip in rain, which affects the normal use. Port cranes are generally used outdoors, so this situation is often encountered, and this aspect should be paid attention to in the design of the crane. You can use anti-skid chains to fix on tires that are prone to slipping. This is to increase the friction between the tire and the ground, thereby reducing the chance of slipping.
Generally speaking, do not use the crane in rainy days, take good measures to prevent rain, pay attention to clear the rain before operation, keep the crane in good working condition, and ensure the safe and stable completion of the lifting task.
Port cranes are large-scale mechanical equipment, which are widely used in ports, which greatly promote the economic construction of ports, improve the efficiency of port transportation, and accelerate the development of society. The port economy promotes exchanges between various regions and is an important part of my country’s economy.
The development of port cranes is also an inevitable trend in society. Nowadays, there are more and more port cranes, and there are more types to meet various needs. The use of port cranes should pay attention to the correct operation, and the lubrication of mechanical equipment is very important. Due to the different working conditions, the lubrication of crane accessories needs to be maintained and checked regularly according to the specifications of the manual, and lubricated with qualified grease, so that the machine can operate normally and overcome early wear.
The transportation of materials is an important part of human production and life. In the past, manual transportation was carried out, especially in ports and docks. There were many workers carrying goods. With the development of the times, it is inevitable that machinery will replace manual labor. The development of cranes is rapid. The development of port cranes and dock cranes reduces manpower, improves work efficiency, and promotes the economy of the terminal.
Due to the continuous expansion of industrial production scale and increasing production efficiency, the demand for large cranes is increasing, and the requirements for cranes are also getting higher and higher, and there are higher requirements in terms of performance, efficiency, and safety.
my country has become the world’s largest crane market, but some large cranes are still not competitive, and there is still great potential for development in engines, hydraulic parts, and electronic control systems. For technological breakthroughs related to super-large tonnage, more hopes are placed on domestic large-scale enterprises with strong technical strength. Because large-tonnage products are technology-oriented, small and medium-sized enterprises lack some technology and funds, and it is difficult to develop them.
The development of port cranes is also an inevitable trend in society. Nowadays, there are more and more port cranes, and there are more types to meet various needs. The use of port cranes should pay attention to the correct operation, and the lubrication of mechanical equipment is very important. Due to the different working conditions, the lubrication of crane accessories needs to be maintained and checked regularly according to the specifications of the manual, and lubricated with qualified grease, so that the machine can operate normally and overcome early wear.
The transportation of materials is an important part of human production and life. In the past, manual transportation was carried out, especially in ports and docks. There were many workers carrying goods. With the development of the times, it is inevitable that machinery will replace manual labor. The development of cranes is rapid. The development of port cranes and dock cranes reduces manpower, improves work efficiency, and promotes the economy of the terminal.
Due to the continuous expansion of industrial production scale and increasing production efficiency, the demand for large cranes is increasing, and the requirements for cranes are also getting higher and higher, and there are higher requirements in terms of performance, efficiency, and safety.
my country has become the world’s largest crane market, but some large cranes are still not competitive, and there is still great potential for development in engines, hydraulic parts, and electronic control systems. For technological breakthroughs related to super-large tonnage, more hopes are placed on domestic large-scale enterprises with strong technical strength. Because large-tonnage products are technology-oriented, small and medium-sized enterprises lack some technology and funds, and it is difficult to develop them.
Wharf cranes and port cranes are important mechanical equipment used in port terminals to move goods, which can improve economic exchanges in various regions, promote economic development, and have a great role in promoting the wharf economy. Qualification inspection of quay cranes is very important, if it does not meet the requirements of use, it will cause safety failures.
You can first roughly observe whether the parts of each part meet the specifications for use and whether they are in good condition. After turning each mechanism by hand without jamming, when the motor of each mechanism is turned on, each mechanism should be able to operate normally, each limit switch can work reliably, the driving wheel of the trolley is in full contact on the track, and the large and small vehicles run along the full length of the track. The gnawing and three-legged phenomenon.
It is necessary to carry out static load test and dynamic load test on the crane to check the load-bearing capacity of the crane and the functions of various mechanisms and brakes. The static load test inspects the structural load-bearing capacity of each part of the crane, and the static load test of each lifting mechanism should be carried out separately. The dynamic load test is to verify the functions of the various mechanisms and brakes of the crane.
The crane can only be inspected and used after all parts of the crane are qualified to ensure that the safety devices are in place, operate the crane correctly, and reduce the occurrence of failures.
Cranes are large-scale machinery and equipment with many applications. Cranes can be seen in ports, wharfs, and urban construction. The crane needs to be overhauled after a period of time. This is to check whether there are bad accessories, replace some aging equipment, and improve the performance of the crane.
If it is determined to be overhauled, the first thing to ensure is personal safety. When adjusting the gap of the adjusting brake of the lifting accessories, replacing the worn clutch or the friction plate, the seat of the driving room can be easily adjusted up and down, and it can also deal with the safety problems that simply lead to the injury of the driving and repairing personnel and the malfunction of the machine.
Some parts that need to be replaced should be replaced in time, and the places that need to be lubricated should be lubricated in time. Pay attention to the precautions for lubrication. Some parts that need to be adjusted should be adjusted well to facilitate the operator to better operate the equipment. If the machine parts are damaged, serious oil leakage, water leakage, air leakage and electricity leakage, etc., when it is necessary to disassemble the main components for repair, it is good to have professional maintenance personnel to repair it. The overhaul of the crane is to improve the performance of the crane and extend the service life.
You can first roughly observe whether the parts of each part meet the specifications for use and whether they are in good condition. After turning each mechanism by hand without jamming, when the motor of each mechanism is turned on, each mechanism should be able to operate normally, each limit switch can work reliably, the driving wheel of the trolley is in full contact on the track, and the large and small vehicles run along the full length of the track. The gnawing and three-legged phenomenon.
It is necessary to carry out static load test and dynamic load test on the crane to check the load-bearing capacity of the crane and the functions of various mechanisms and brakes. The static load test inspects the structural load-bearing capacity of each part of the crane, and the static load test of each lifting mechanism should be carried out separately. The dynamic load test is to verify the functions of the various mechanisms and brakes of the crane.
The crane can only be inspected and used after all parts of the crane are qualified to ensure that the safety devices are in place, operate the crane correctly, and reduce the occurrence of failures.
Cranes are large-scale machinery and equipment with many applications. Cranes can be seen in ports, wharfs, and urban construction. The crane needs to be overhauled after a period of time. This is to check whether there are bad accessories, replace some aging equipment, and improve the performance of the crane.
If it is determined to be overhauled, the first thing to ensure is personal safety. When adjusting the gap of the adjusting brake of the lifting accessories, replacing the worn clutch or the friction plate, the seat of the driving room can be easily adjusted up and down, and it can also deal with the safety problems that simply lead to the injury of the driving and repairing personnel and the malfunction of the machine.
Some parts that need to be replaced should be replaced in time, and the places that need to be lubricated should be lubricated in time. Pay attention to the precautions for lubrication. Some parts that need to be adjusted should be adjusted well to facilitate the operator to better operate the equipment. If the machine parts are damaged, serious oil leakage, water leakage, air leakage and electricity leakage, etc., when it is necessary to disassemble the main components for repair, it is good to have professional maintenance personnel to repair it. The overhaul of the crane is to improve the performance of the crane and extend the service life.
Hoisting machinery equipment is a large-scale equipment, and manufacturers must undergo strict inspections during the production process, and they must also be inspected before leaving the factory. Sometimes it may be because the inspection fails, leading to safety accidents during crane operation, so inspection before leaving the factory is indispensable.
The crane equipment is mainly maintained by dedicated personnel. After the equipment is delivered, its daily maintenance work shall be taken care of by the driver or equipment operation full-time personnel. The installation and maintenance unit has the obligation to supervise and inspect the contents of daily maintenance. Effective lubrication needs to be carried out according to its regulations. It is necessary to pay attention to the normal production of mechanical operation. Cleaning work and shift work are required during the operation, so that the appearance of the equipment is tidy and normal operation. The production and development of cranes has greatly promoted my country’s economic construction, and cranes play an important role in ports and construction industries.
There are many types of cranes, including gantry cranes, port cranes, ship cranes, bridge cranes, etc. Choose different cranes for different occasions. Cranes are important equipment used for handling, loading and unloading. With the development of science and technology and the progress of society, the trend of innovation and development of cranes is obvious.
The development of crane production is inseparable from the advancement of science and technology, combined with computer technology, improves the efficiency of production, reduces errors in the production process, and can detect the performance of the product. The crane has further developed new transmission components and simplified the mechanism. The three-in-one operating mechanism integrates a motor, a reducer and a brake. It has the advantages of compact structure, beautiful appearance, convenient disassembly and assembly, simple adjustment, stable operation, and large supporting range.
New products have been widely used. Only continuous innovation and improvement of crane performance are of great help to the safe and stable operation. Now the crane operation is relatively simple, and it is not as dangerous as before, and safety measures have been increased.
The crane equipment is mainly maintained by dedicated personnel. After the equipment is delivered, its daily maintenance work shall be taken care of by the driver or equipment operation full-time personnel. The installation and maintenance unit has the obligation to supervise and inspect the contents of daily maintenance. Effective lubrication needs to be carried out according to its regulations. It is necessary to pay attention to the normal production of mechanical operation. Cleaning work and shift work are required during the operation, so that the appearance of the equipment is tidy and normal operation. The production and development of cranes has greatly promoted my country’s economic construction, and cranes play an important role in ports and construction industries.
There are many types of cranes, including gantry cranes, port cranes, ship cranes, bridge cranes, etc. Choose different cranes for different occasions. Cranes are important equipment used for handling, loading and unloading. With the development of science and technology and the progress of society, the trend of innovation and development of cranes is obvious.
The development of crane production is inseparable from the advancement of science and technology, combined with computer technology, improves the efficiency of production, reduces errors in the production process, and can detect the performance of the product. The crane has further developed new transmission components and simplified the mechanism. The three-in-one operating mechanism integrates a motor, a reducer and a brake. It has the advantages of compact structure, beautiful appearance, convenient disassembly and assembly, simple adjustment, stable operation, and large supporting range.
New products have been widely used. Only continuous innovation and improvement of crane performance are of great help to the safe and stable operation. Now the crane operation is relatively simple, and it is not as dangerous as before, and safety measures have been increased.
Now the development of construction, electric power, transportation and other industries has entered a climax, and the development of crane equipment has been rapidly improved. Cranes are important equipment for large-scale infrastructure construction, and specialization is the development trend of the machinery industry.
As an important part of the automated production process, simple operation, safety, reliability and easy maintenance are the basic requirements for cranes. In addition, cost-effective cranes will be more popular in the future. For this reason, cranes are specialized to meet the continuous development and application of various work requirements, such as special cranes for nuclear power, paper making, garbage disposal, etc., professional and special cranes can also meet various working environments such as dock cranes, grab cranes, etc. , It has greatly improved in anti-corrosion, explosion-proof, insulation, etc. The performance of special cranes for railways and ships is also increasing, and their adaptability to the environment is also increasing.
The development of cranes in our country is getting better and better. We should pay attention to mechanical technology, study and put forward corresponding countermeasures to improve the sustainable development of equipment. Although China has entered the high-end field, it is in independent innovation, establishing its own brand, and promoting strategy. Development, innovation leads development, and long-term development does our best to realize the industry, and the cultivation of intellectual property awareness should be strengthened.
Nowadays, there are more and more crane manufacturers, more and more machinery and equipment on the market, and the homogeneity is more serious, leading to the situation of backward production capacity. The improper handling of some manufacturers has further affected the development.
Some companies adopt some irrational promotion methods, not only the credit sales model: low down payment or even zero down payment to find more orders, but these radical promotion methods are undoubtedly a huge risk in the development of the company, and some users do not even have to repay Their debt crisis capability will eventually lead to the risk that the company will eventually be difficult to recover. This factor will directly affect the production and business operations of cranes, etc., and even lead to the break of the capital chain, which is greatly detrimental to the development of the company.
If crane manufacturers want to develop, they need to continuously improve their production technology, adopt high-quality materials and advanced designs, improve the performance and quality of cranes, and promote the development of the industry.
As an important part of the automated production process, simple operation, safety, reliability and easy maintenance are the basic requirements for cranes. In addition, cost-effective cranes will be more popular in the future. For this reason, cranes are specialized to meet the continuous development and application of various work requirements, such as special cranes for nuclear power, paper making, garbage disposal, etc., professional and special cranes can also meet various working environments such as dock cranes, grab cranes, etc. , It has greatly improved in anti-corrosion, explosion-proof, insulation, etc. The performance of special cranes for railways and ships is also increasing, and their adaptability to the environment is also increasing.
The development of cranes in our country is getting better and better. We should pay attention to mechanical technology, study and put forward corresponding countermeasures to improve the sustainable development of equipment. Although China has entered the high-end field, it is in independent innovation, establishing its own brand, and promoting strategy. Development, innovation leads development, and long-term development does our best to realize the industry, and the cultivation of intellectual property awareness should be strengthened.
Nowadays, there are more and more crane manufacturers, more and more machinery and equipment on the market, and the homogeneity is more serious, leading to the situation of backward production capacity. The improper handling of some manufacturers has further affected the development.
Some companies adopt some irrational promotion methods, not only the credit sales model: low down payment or even zero down payment to find more orders, but these radical promotion methods are undoubtedly a huge risk in the development of the company, and some users do not even have to repay Their debt crisis capability will eventually lead to the risk that the company will eventually be difficult to recover. This factor will directly affect the production and business operations of cranes, etc., and even lead to the break of the capital chain, which is greatly detrimental to the development of the company.
If crane manufacturers want to develop, they need to continuously improve their production technology, adopt high-quality materials and advanced designs, improve the performance and quality of cranes, and promote the development of the industry.
The development of the hoisting industry has greatly promoted the construction of our country’s economy. It has an important role in cargo handling, equipment hoisting, and infrastructure construction, such as dock cranes, gantry cranes, ship cranes, etc. These mechanical equipment Development has promoted social progress.
As the market’s demand for material handling equipment continues to grow, Chinese companies’ competitiveness in the international market is also increasing. At the same time, as market competition intensifies, the technical content of the heavy-duty transportation industry has also greatly improved.
With the continuous expansion of industrial production scale and the improvement of production efficiency, the proportion of material handling costs is gradually increasing, and the demand is large, and there are more and more high-speed, automated cranes. The working speed of the crane is getting faster and faster, the degree of automation is getting higher and higher, and the energy consumption and reliability will put forward higher requirements, which requires the standardization and efficiency of the development of the high-quality crane industry. Therefore, the future development of the crane industry takes up a lot of space.
The production and use of cranes have brought convenience to production and life. Cranes play an indispensable position in engineering construction and port terminals. Now the production and development of enterprises cannot be separated from the use of mechanical equipment.
There are many types of cranes. Port cranes are important machinery in port terminals and play an important role in the development of port economy. Price is a point that buyers pay more attention to. After all, this is also a small cost, and there are some customers who don’t know much about cranes. They believe that the crane can be used as long as it can be used. Few people know the high maintenance cost of cranes. We do not recommend the more expensive the better, but to meet their own production needs, the crane configuration is determined according to the frequency of use.
Crane equipment must meet the needs of use. Price is one aspect of the choice. The important thing is whether the requirements of the equipment meet the needs of use, whether the parts required by the equipment can operate well, etc. These are all aspects that need to be considered when selecting a crane.
As the market’s demand for material handling equipment continues to grow, Chinese companies’ competitiveness in the international market is also increasing. At the same time, as market competition intensifies, the technical content of the heavy-duty transportation industry has also greatly improved.
With the continuous expansion of industrial production scale and the improvement of production efficiency, the proportion of material handling costs is gradually increasing, and the demand is large, and there are more and more high-speed, automated cranes. The working speed of the crane is getting faster and faster, the degree of automation is getting higher and higher, and the energy consumption and reliability will put forward higher requirements, which requires the standardization and efficiency of the development of the high-quality crane industry. Therefore, the future development of the crane industry takes up a lot of space.
The production and use of cranes have brought convenience to production and life. Cranes play an indispensable position in engineering construction and port terminals. Now the production and development of enterprises cannot be separated from the use of mechanical equipment.
There are many types of cranes. Port cranes are important machinery in port terminals and play an important role in the development of port economy. Price is a point that buyers pay more attention to. After all, this is also a small cost, and there are some customers who don’t know much about cranes. They believe that the crane can be used as long as it can be used. Few people know the high maintenance cost of cranes. We do not recommend the more expensive the better, but to meet their own production needs, the crane configuration is determined according to the frequency of use.
Crane equipment must meet the needs of use. Price is one aspect of the choice. The important thing is whether the requirements of the equipment meet the needs of use, whether the parts required by the equipment can operate well, etc. These are all aspects that need to be considered when selecting a crane.
Lifting equipment is widely used and plays an important role in engineering construction, as well as its role in port and dock handling. With the development of my country’s shipping and the development of logistics and transportation, the degree of automation of the mechanical equipment of the port and terminal is getting higher and higher. The continuous improvement of mechanization and automation technology of port cranes has greatly promoted the economy.
The requirements of mechanical equipment such as cranes are getting higher and higher, and the structure is becoming more and more complicated. Sometimes motor equipment failures occur. If the problem cannot be detected in time, the phenomenon that will affect the failure of the mechanical and electrical equipment gradually increases, which directly affects The quality and progress of operations reduce the economic benefits of the port.
Therefore, crane detection technology has been greatly improved. In the past, it was judged from the senses, and based on professional knowledge and experience, it can now be diagnosed through computer technology, sensor technology and dynamic monitoring technology. And intelligent detection technology has gradually been developed, which can quickly determine where the fault is and solve the problem.
The production and development of hoisting machinery has brought great convenience to people’s lives, but the production of machinery and equipment requires increased technical investment, time and research and development efforts, so that high-quality port cranes can be produced.
The development of science and technology has promoted the progress of port cranes, and greatly improved the design, structure and performance. Energy conservation is the theme of society, and it is necessary to carry out energy-saving production and transformation of equipment to further improve its carrying capacity, stability, and safety. The society is always progressing, people’s requirements are getting higher and higher, the demand is more, and the technology of updating products will not stop.
Manufacturers must have professional talents. Manufacturers must invest in research and development funds and increase their energy to produce and design advanced equipment. Although the port cranes have made great progress, they still need to work hard and break through themselves in order to keep up with the society. pace.
The requirements of mechanical equipment such as cranes are getting higher and higher, and the structure is becoming more and more complicated. Sometimes motor equipment failures occur. If the problem cannot be detected in time, the phenomenon that will affect the failure of the mechanical and electrical equipment gradually increases, which directly affects The quality and progress of operations reduce the economic benefits of the port.
Therefore, crane detection technology has been greatly improved. In the past, it was judged from the senses, and based on professional knowledge and experience, it can now be diagnosed through computer technology, sensor technology and dynamic monitoring technology. And intelligent detection technology has gradually been developed, which can quickly determine where the fault is and solve the problem.
The production and development of hoisting machinery has brought great convenience to people’s lives, but the production of machinery and equipment requires increased technical investment, time and research and development efforts, so that high-quality port cranes can be produced.
The development of science and technology has promoted the progress of port cranes, and greatly improved the design, structure and performance. Energy conservation is the theme of society, and it is necessary to carry out energy-saving production and transformation of equipment to further improve its carrying capacity, stability, and safety. The society is always progressing, people’s requirements are getting higher and higher, the demand is more, and the technology of updating products will not stop.
Manufacturers must have professional talents. Manufacturers must invest in research and development funds and increase their energy to produce and design advanced equipment. Although the port cranes have made great progress, they still need to work hard and break through themselves in order to keep up with the society. pace.
Hoisting machinery is generally a large-scale mechanical equipment, composed of many parts, and the quality of the parts is greatly related to the performance of the crane. Port cranes are large-scale electromechanical equipment. They are generally customized products according to the actual production needs and use functions of users. They have unique functions and require a complete quality management system to avoid quality problems.
Quality management is an important aspect of the crane industry and has a great impact on market competitiveness. Improving the quality of cranes is to solve the current common problems of large machinery. Solving the frequently occurring problems of port cranes requires functional improvement, technological innovation, design innovation and quality control for each product. The quality improvement and control of processed products one by one are mainly reflected in two aspects: processing and design. Grasping the design work of lifting machinery products is the source of product quality. It is a key node to ensure the quality of port cranes. The quality control of additional products is equal to the quality control in the production process. The quality of each part of the product is controlled so that it can meet the needs of the market. In order to meet the performance of port cranes, the first thing to pay attention to is the quality problem, and quality management is very necessary.
Research on Energy Saving Direction of Dock Cranes
With the rapid economic development, there is an increasing demand for cranes in the construction industry, terminal freight and metallurgical industries, and cranes are developing in the direction of large-scale automation and multi-function complexity. However, the energy consumption of lifting motors is getting higher and higher. However, the global energy crisis has deteriorated at the same time, and energy conservation and emission reduction are also a national policy implemented by my country. Therefore, how to improve the energy efficiency of quay cranes, reduce power consumption, and achieve the goal of energy saving and consumption reduction has become the focus of research in the industry.
With the development of technology, the energy-saving control mode of cranes has been studied and developed more and more widely. The development and application of more and more advanced crane control systems. The development and application of energy-saving motors are very helpful to the energy-saving of cranes. Energy-saving frequency converter control has been widely used in frequency converters, technology-integrated torque control modes, etc. Various energy-saving designs and researches have made certain achievements in cranes. It is believed that in the near future, the energy saving effect of the crane will reach the ideal state.
Cranes are important tools and equipment to realize mechanization and automation, reducing heavy labor and improving the productivity of modern industrial enterprises. With the development of modern industry, the expansion of production scale and the improvement of automation, as an important material handling equipment, its role is getting bigger and bigger, and it is more and more widely used in the modern production process, such as in Ports, docks, etc.
Cranes are important tools and equipment to realize mechanization and automation, reducing heavy labor and improving the productivity of modern industrial enterprises. With the development of modern industry, the expansion of production scale and the improvement of automation, as an important material handling equipment, its role is getting bigger and bigger, and it is more and more widely used in the modern production process, such as in Ports, docks, etc.
Quality management is an important aspect of the crane industry and has a great impact on market competitiveness. Improving the quality of cranes is to solve the current common problems of large machinery. Solving the frequently occurring problems of port cranes requires functional improvement, technological innovation, design innovation and quality control for each product. The quality improvement and control of processed products one by one are mainly reflected in two aspects: processing and design. Grasping the design work of lifting machinery products is the source of product quality. It is a key node to ensure the quality of port cranes. The quality control of additional products is equal to the quality control in the production process. The quality of each part of the product is controlled so that it can meet the needs of the market. In order to meet the performance of port cranes, the first thing to pay attention to is the quality problem, and quality management is very necessary.
Research on Energy Saving Direction of Dock Cranes
With the rapid economic development, there is an increasing demand for cranes in the construction industry, terminal freight and metallurgical industries, and cranes are developing in the direction of large-scale automation and multi-function complexity. However, the energy consumption of lifting motors is getting higher and higher. However, the global energy crisis has deteriorated at the same time, and energy conservation and emission reduction are also a national policy implemented by my country. Therefore, how to improve the energy efficiency of quay cranes, reduce power consumption, and achieve the goal of energy saving and consumption reduction has become the focus of research in the industry.
With the development of technology, the energy-saving control mode of cranes has been studied and developed more and more widely. The development and application of more and more advanced crane control systems. The development and application of energy-saving motors are very helpful to the energy-saving of cranes. Energy-saving frequency converter control has been widely used in frequency converters, technology-integrated torque control modes, etc. Various energy-saving designs and researches have made certain achievements in cranes. It is believed that in the near future, the energy saving effect of the crane will reach the ideal state.
Cranes are important tools and equipment to realize mechanization and automation, reducing heavy labor and improving the productivity of modern industrial enterprises. With the development of modern industry, the expansion of production scale and the improvement of automation, as an important material handling equipment, its role is getting bigger and bigger, and it is more and more widely used in the modern production process, such as in Ports, docks, etc.
Cranes are important tools and equipment to realize mechanization and automation, reducing heavy labor and improving the productivity of modern industrial enterprises. With the development of modern industry, the expansion of production scale and the improvement of automation, as an important material handling equipment, its role is getting bigger and bigger, and it is more and more widely used in the modern production process, such as in Ports, docks, etc.
Factors for unqualified crane inspection
2021年1月26日 日常Large-scale crane machinery and equipment, no matter what type it is, need to undergo strict inspections, but in many cases, cranes fail to pass the inspection. There are many factors, mainly the following points.
Incomplete equipment information
During the inspection of the crane, there are often differences between the crane’s product mark and the provisions of the "Crane Transport Machinery Compilation Method". According to the requirements of the crane, the working level of the crane will be divided into A1-A8 and other levels.
Unreasonable crane settings
In the crane production process, some parts are missing. According to the requirements of the crane safety regulations, the crane must have a voltage loss protection function, through the start button switch and contactor for voltage loss protection, but did not start. The tonnage on the crane is often replaced by an emergency switch when it is started. Over time, the emergency switch will wear out, which will affect the crane’s response ability in emergency situations and lead to safety accidents.
Ignore the installation of the grounding wire
The safety regulations of the crane clearly stipulate that the connection between the cab and the crane itself shall not be less than two when bolted. In the crane, workers often pay attention to whether the quality of the electrical equipment meets the specifications and ignore them. Therefore, when the crane is working, the personal safety of the driver is often damaged.
Design is not standard
In various parts of the crane, the installation of the main line contactor will be ignored by many designers, so it will not leave too much space for the installer to install the main line contactor. The contact points of all operating systems are easy to stick, in this case, it will adversely affect the crane’s work.
Incomplete equipment information
During the inspection of the crane, there are often differences between the crane’s product mark and the provisions of the "Crane Transport Machinery Compilation Method". According to the requirements of the crane, the working level of the crane will be divided into A1-A8 and other levels.
Unreasonable crane settings
In the crane production process, some parts are missing. According to the requirements of the crane safety regulations, the crane must have a voltage loss protection function, through the start button switch and contactor for voltage loss protection, but did not start. The tonnage on the crane is often replaced by an emergency switch when it is started. Over time, the emergency switch will wear out, which will affect the crane’s response ability in emergency situations and lead to safety accidents.
Ignore the installation of the grounding wire
The safety regulations of the crane clearly stipulate that the connection between the cab and the crane itself shall not be less than two when bolted. In the crane, workers often pay attention to whether the quality of the electrical equipment meets the specifications and ignore them. Therefore, when the crane is working, the personal safety of the driver is often damaged.
Design is not standard
In various parts of the crane, the installation of the main line contactor will be ignored by many designers, so it will not leave too much space for the installer to install the main line contactor. The contact points of all operating systems are easy to stick, in this case, it will adversely affect the crane’s work.
Safety is the primary requirement for the production and development of various industries. The cultivation and improvement of safety awareness is very necessary, especially in the hoisting industry with potential safety hazards. The operation of cranes in port terminals must pay attention to safety issues. The safety of quay cranes must be guaranteed to reduce accidents.
Safety education is essential
Safety education should run through the entire production process and should not be underestimated. At the construction site, there is a lot of noise, and safety knowledge and safety regulations must be used to ensure safety. The problem of safety education is the format of most companies. Only when the government supervision department grasps the safety issue, the company will notice, in fact, it needs to pay attention to it.
Safety management on construction site
The equipment safety precautions before and after use are not in place, and the reliability of safety precautions is poor. The user does not understand the mechanical performance, and does not understand the operation and operation precautions of the quay crane, which is not acceptable. The construction site needs to be supervised by management personnel to reduce accidents.
Electrical equipment does not meet standards
In electrical equipment, non-compliance with standards is more common. The main switch capacity is too large or too small, copper wires instead of fuses, end connections and other irrelevant equipment, cables, wires aging, wiring confusion, loose terminals, unmarked , SWI, etc. TCH damage, zero grounding protection or protection failure, grounding insulation resistance, etc.
Maintenance of equipment is essential
Equipment use and management personnel should be familiar with equipment conditions, master equipment principles, structure, performance, use, operation, maintenance, maintenance, and troubleshooting. Operators are undocumented and lack professional training. Operators neglect safety inspections during long-term use of equipment, often causing major disasters due to minor problems. It is very important for equipment maintenance.
Safety education is essential
Safety education should run through the entire production process and should not be underestimated. At the construction site, there is a lot of noise, and safety knowledge and safety regulations must be used to ensure safety. The problem of safety education is the format of most companies. Only when the government supervision department grasps the safety issue, the company will notice, in fact, it needs to pay attention to it.
Safety management on construction site
The equipment safety precautions before and after use are not in place, and the reliability of safety precautions is poor. The user does not understand the mechanical performance, and does not understand the operation and operation precautions of the quay crane, which is not acceptable. The construction site needs to be supervised by management personnel to reduce accidents.
Electrical equipment does not meet standards
In electrical equipment, non-compliance with standards is more common. The main switch capacity is too large or too small, copper wires instead of fuses, end connections and other irrelevant equipment, cables, wires aging, wiring confusion, loose terminals, unmarked , SWI, etc. TCH damage, zero grounding protection or protection failure, grounding insulation resistance, etc.
Maintenance of equipment is essential
Equipment use and management personnel should be familiar with equipment conditions, master equipment principles, structure, performance, use, operation, maintenance, maintenance, and troubleshooting. Operators are undocumented and lack professional training. Operators neglect safety inspections during long-term use of equipment, often causing major disasters due to minor problems. It is very important for equipment maintenance.
Nowadays, economic development has promoted the development of transportation, and the exchanges between different places have become larger and larger, which has accelerated the development of society, improved the pace of people’s lives, and narrowed the distance between people. Ports are also places where goods are transported, and cranes are needed to carry goods. There are many types of port cranes and competition is relatively high.
Types of port cranes
Port cranes include gantry cranes, container cranes, ship cranes, etc. The quayside container cranes can work at the front of the terminal, loading and unloading containers and other important lifting equipment. The dedicated container yard loading and unloading operation lifting equipment, the rail-mounted container gantry crane can move on the track, and the container loading and unloading crane can be carried out within a certain range.
How to improve market competitiveness
It is necessary to train professional, international and modern technical personnel, develop new theories, new technologies and new methods, and promote the development of intelligence and energy saving in the crane industry, and strive to improve and test the manufacturing technology of technology. Improve service level, provide a complete set of engineering solutions based on customers’ special needs, ensure product quality, improve product durability, and do after-sales service and maintenance work.
Cranes are the most used construction machinery in modern society, and they are widely used in the construction industry, ports and docks. The development of science and technology and the advancement of electronic technology have promoted the automation process of the industry.
There are many types of crane equipment, including gantry cranes, dock cranes, ship cranes, port cranes, floating cranes, cantilever cranes and other types. The market competitiveness is relatively high. Due to the continuous expansion of industrial production scale and increasing production efficiency, the proportion of material handling costs in the production process is gradually increasing, and the demand for large, high-speed and automated cranes is also increasing. The working speed of the crane is getting faster and faster, the degree of automation is getting higher and higher, and higher requirements for energy consumption and reliability will be put forward.
There is a lot of room for the development of the crane industry, and refinement is the key direction of the company’s future development. Different customers and different applicable occasions require different equipment, professional mechanical equipment can improve economic efficiency, and automation technology improves the mechanical performance of the equipment.
Types of port cranes
Port cranes include gantry cranes, container cranes, ship cranes, etc. The quayside container cranes can work at the front of the terminal, loading and unloading containers and other important lifting equipment. The dedicated container yard loading and unloading operation lifting equipment, the rail-mounted container gantry crane can move on the track, and the container loading and unloading crane can be carried out within a certain range.
How to improve market competitiveness
It is necessary to train professional, international and modern technical personnel, develop new theories, new technologies and new methods, and promote the development of intelligence and energy saving in the crane industry, and strive to improve and test the manufacturing technology of technology. Improve service level, provide a complete set of engineering solutions based on customers’ special needs, ensure product quality, improve product durability, and do after-sales service and maintenance work.
Cranes are the most used construction machinery in modern society, and they are widely used in the construction industry, ports and docks. The development of science and technology and the advancement of electronic technology have promoted the automation process of the industry.
There are many types of crane equipment, including gantry cranes, dock cranes, ship cranes, port cranes, floating cranes, cantilever cranes and other types. The market competitiveness is relatively high. Due to the continuous expansion of industrial production scale and increasing production efficiency, the proportion of material handling costs in the production process is gradually increasing, and the demand for large, high-speed and automated cranes is also increasing. The working speed of the crane is getting faster and faster, the degree of automation is getting higher and higher, and higher requirements for energy consumption and reliability will be put forward.
There is a lot of room for the development of the crane industry, and refinement is the key direction of the company’s future development. Different customers and different applicable occasions require different equipment, professional mechanical equipment can improve economic efficiency, and automation technology improves the mechanical performance of the equipment.
The boom is an important part of the crane, which has a great effect on the lifting of goods. It is lifted by the function of the boom. If the boom is deformed, it will be a great threat to the safety of the port crane. The deformation of the lifting boom can be repaired by welding to meet the relevant technical requirements.
The crane boom is the main load-bearing component, and it needs to be replaced or repaired to operate after deformation, but it is not cost-effective to replace the new boom. The purchase price of the new boom is high, the transportation is inconvenient, and the delay is long. In order to save cost and time, welding can be repaired according to the actual situation on site. After the boom is repaired, it needs to reach the technical parameter requirements of the crane. Therefore, it is very important to choose a reasonable repair technique.
Material selection
If you want to repair, you need to clarify the shape and material of the deformed boom, generally rectangular, pentagonal and polygonal, and the material selection of the boom must meet the requirements of the crane’s bending strength index.
Preparation before welding
The deformed parts should be processed and sorted before welding. After disassembling the deformed boom, use a gas cutting machine to cut the deformed part of the groove plate and web. The cut part is shown on the right, and the remaining part of the boom is polished. ,Remove the exterior paint and all kinds of stolen goods, put the already cut boom on the hydraulic machine for shaping, straightening, and fixing it on the platform with clips.
Selection of welding technology
When welding, ensure the penetration and easy processing. Because the thickness of the material is greater than 6mm, the groove should be opened with manual arc welding for flexible and convenient application. Mainly butt welding, using manual arc welding, the welding method is single-sided welding and double-sided forming.
The crane boom is the main load-bearing component, and it needs to be replaced or repaired to operate after deformation, but it is not cost-effective to replace the new boom. The purchase price of the new boom is high, the transportation is inconvenient, and the delay is long. In order to save cost and time, welding can be repaired according to the actual situation on site. After the boom is repaired, it needs to reach the technical parameter requirements of the crane. Therefore, it is very important to choose a reasonable repair technique.
Material selection
If you want to repair, you need to clarify the shape and material of the deformed boom, generally rectangular, pentagonal and polygonal, and the material selection of the boom must meet the requirements of the crane’s bending strength index.
Preparation before welding
The deformed parts should be processed and sorted before welding. After disassembling the deformed boom, use a gas cutting machine to cut the deformed part of the groove plate and web. The cut part is shown on the right, and the remaining part of the boom is polished. ,Remove the exterior paint and all kinds of stolen goods, put the already cut boom on the hydraulic machine for shaping, straightening, and fixing it on the platform with clips.
Selection of welding technology
When welding, ensure the penetration and easy processing. Because the thickness of the material is greater than 6mm, the groove should be opened with manual arc welding for flexible and convenient application. Mainly butt welding, using manual arc welding, the welding method is single-sided welding and double-sided forming.
The quality of cranes is linked to safety, and the use of cranes promotes economic development. Especially with the development of trade economy, the application of port cranes is increasing, and the types are also increasing, and the quality problem is becoming increasingly prominent.
Manufacturers should pay attention to strengthening management
In order to maintain the outstanding competitiveness of the enterprise, it is necessary to deal with some problems in the daily management of port cranes and make continuous improvements. In addition, the quality of the machinery must be strictly controlled during the production process. Therefore, manufacturers are faced with the problem of how to improve mechanical products and how to control the quality of products in the process of mechanical production. Only after determining these issues, we can formulate measures to prevent security incidents accordingly.
Installation and disassembly of crane
Port cranes are classified as large electromechanical products, and the installation equipment does not have high qualifications, so the quality of port crane operators cannot be guaranteed. Moreover, the installation and dismantling of port cranes should be contracted to a professional company to complete, and specific rules will generally be made in the contract, requiring the contractor to complete the port crane’s installation to dismantling. The whole process from driving to leaving, and supervision and management of this process.
The quality of port cranes varies greatly
There are many crane manufacturers, and the quality varies greatly. This has a great relationship with the production enterprises. Some enterprises are willing to invest funds to improve the quality of the equipment, but some enterprises lack the technology in the production and manufacturing, which leads to the quality big different. Relevant departments need to strengthen supervision and eliminate poor quality products.
Insufficient use and maintenance of cranes
Port cranes are exposed to the sun and rain. After a long time of use, the quality will decrease, and some parts will be rusted, which will affect the safety of use. Therefore, the maintenance of the crane is very important.
Manufacturers should pay attention to strengthening management
In order to maintain the outstanding competitiveness of the enterprise, it is necessary to deal with some problems in the daily management of port cranes and make continuous improvements. In addition, the quality of the machinery must be strictly controlled during the production process. Therefore, manufacturers are faced with the problem of how to improve mechanical products and how to control the quality of products in the process of mechanical production. Only after determining these issues, we can formulate measures to prevent security incidents accordingly.
Installation and disassembly of crane
Port cranes are classified as large electromechanical products, and the installation equipment does not have high qualifications, so the quality of port crane operators cannot be guaranteed. Moreover, the installation and dismantling of port cranes should be contracted to a professional company to complete, and specific rules will generally be made in the contract, requiring the contractor to complete the port crane’s installation to dismantling. The whole process from driving to leaving, and supervision and management of this process.
The quality of port cranes varies greatly
There are many crane manufacturers, and the quality varies greatly. This has a great relationship with the production enterprises. Some enterprises are willing to invest funds to improve the quality of the equipment, but some enterprises lack the technology in the production and manufacturing, which leads to the quality big different. Relevant departments need to strengthen supervision and eliminate poor quality products.
Insufficient use and maintenance of cranes
Port cranes are exposed to the sun and rain. After a long time of use, the quality will decrease, and some parts will be rusted, which will affect the safety of use. Therefore, the maintenance of the crane is very important.
Now crane equipment is a relatively common equipment for loading, unloading and handling. Crane equipment is used when manpower cannot handle it. That is to say, cranes are a good helper for people and are very important in work and life and promote the development of the national economy. Port cranes promote economic trade in ports, and sometimes require reinforcement to extend service life and improve safety performance.
Reinforcement plan
The chassis is a beam structure, which is mainly subjected to bending stress, and the stress is concentrated at the position where the distal end of the leg is combined with the center rotation, and the cross section of the chassis is a box structure. According to these actual conditions and combined with the construction requirements, we decided to use the opposite vertical slabs and horizontal slabs to reinforce the slabs, and to weld the two slabs with a diagonally-stayed slab into one body. In this way, the three slabs form a stable The tripod structure, through theoretical calculations, has increased its strength by more than 15%, which meets actual requirements.
Material quality
The material is close to that of the crane to ensure the welding effect, and the performance of the material must meet the strength requirements. After selecting the material, the base material and the new material were sampled separately and then welded together to conduct a destruction test. The result was that the base material was broken, indicating that the strength of the new material and the welded part was greater than the base material, ensuring the construction quality and strength requirements.
Welding process
It mainly requires six aspects including cleaning and preheating, welding rod drying, processing reinforcement plate, welding machine, welding construction procedure and post-welding heat preservation, so as to ensure the construction quality.
Strength test
Check whether the welded parts have missing welding and burn-through phenomena, and whether they meet the requirements of use. After the reinforcement is completed, the structural parts must be inspected to determine the percentage increase in the strength of the chassis structural parts, and then compared with the actual requirement of 15%, so as to conclude whether the construction is qualified.
Reinforcement plan
The chassis is a beam structure, which is mainly subjected to bending stress, and the stress is concentrated at the position where the distal end of the leg is combined with the center rotation, and the cross section of the chassis is a box structure. According to these actual conditions and combined with the construction requirements, we decided to use the opposite vertical slabs and horizontal slabs to reinforce the slabs, and to weld the two slabs with a diagonally-stayed slab into one body. In this way, the three slabs form a stable The tripod structure, through theoretical calculations, has increased its strength by more than 15%, which meets actual requirements.
Material quality
The material is close to that of the crane to ensure the welding effect, and the performance of the material must meet the strength requirements. After selecting the material, the base material and the new material were sampled separately and then welded together to conduct a destruction test. The result was that the base material was broken, indicating that the strength of the new material and the welded part was greater than the base material, ensuring the construction quality and strength requirements.
Welding process
It mainly requires six aspects including cleaning and preheating, welding rod drying, processing reinforcement plate, welding machine, welding construction procedure and post-welding heat preservation, so as to ensure the construction quality.
Strength test
Check whether the welded parts have missing welding and burn-through phenomena, and whether they meet the requirements of use. After the reinforcement is completed, the structural parts must be inspected to determine the percentage increase in the strength of the chassis structural parts, and then compared with the actual requirement of 15%, so as to conclude whether the construction is qualified.
Mechanical paint spraying method
2020年12月24日 日常First, the top ranking spraying-mist spray
1. Viscosity-14-16 seconds (20°)
2. Spit volume--1/2-2/3
3. Painting pressure--4.0-5.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-fully open, technicians are spraying
6. When spraying-slightly faster
Spray the whole body loosely and thinly to initially merge with the underlying coating film. At the same time, confirm whether there is a shrinkage hole. If there is, increase the air pressure (6.5 bar) on the area slightly and apply concentrated spraying to fill the shrinkage hole.
2. The second spray-fixed color spray
1. Viscosity-14-16 seconds (20°)
2. Discharge volume--2/3-3/4
3. Painting pressure-4.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-full open
6. When spraying-slightly faster
The second spray is used to fix the color. Don’t pay too much attention to the spray marks and metal stains, just spray one layer to fix the color. The moving speed of the spraying tool is better. Repeating the spraying once can generally solve the problem. If the color is not enough, you can use the second spraying method to spray again.
3. The third spray-correction spray
1. Viscosity-11-13 seconds (20°)
2. Spit volume--1/2-2/3
3. Painting pressure-4.5-5.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-full open
6. When spraying-slightly faster
This spraying is to trim the paint stains and spray marks left after the fixed-color spraying, and make the mechanical texture better.
main feature
(1) Contamination resistance.
(2) Durability: including freeze-thaw resistance, scrubbing resistance, and aging resistance.
(3) Alkali resistance: The decorative objects of paint are mainly alkaline materials, so alkali is an important characteristic of paint.
(4) Low film-forming temperature: Each coating has a low film-forming temperature, and different coatings have different low film-forming temperatures.
1. Viscosity-14-16 seconds (20°)
2. Spit volume--1/2-2/3
3. Painting pressure--4.0-5.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-fully open, technicians are spraying
6. When spraying-slightly faster
Spray the whole body loosely and thinly to initially merge with the underlying coating film. At the same time, confirm whether there is a shrinkage hole. If there is, increase the air pressure (6.5 bar) on the area slightly and apply concentrated spraying to fill the shrinkage hole.
2. The second spray-fixed color spray
1. Viscosity-14-16 seconds (20°)
2. Discharge volume--2/3-3/4
3. Painting pressure-4.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-full open
6. When spraying-slightly faster
The second spray is used to fix the color. Don’t pay too much attention to the spray marks and metal stains, just spray one layer to fix the color. The moving speed of the spraying tool is better. Repeating the spraying once can generally solve the problem. If the color is not enough, you can use the second spraying method to spray again.
3. The third spray-correction spray
1. Viscosity-11-13 seconds (20°)
2. Spit volume--1/2-2/3
3. Painting pressure-4.5-5.0 bar
4. The distance of the spraying tool-25-30cm
5. Standard spray blessing-full open
6. When spraying-slightly faster
This spraying is to trim the paint stains and spray marks left after the fixed-color spraying, and make the mechanical texture better.
main feature
(1) Contamination resistance.
(2) Durability: including freeze-thaw resistance, scrubbing resistance, and aging resistance.
(3) Alkali resistance: The decorative objects of paint are mainly alkaline materials, so alkali is an important characteristic of paint.
(4) Low film-forming temperature: Each coating has a low film-forming temperature, and different coatings have different low film-forming temperatures.
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