As the contractor of Laem Charbang Port crane project for Port Authority of Thailand. Yuantai is carrying out the assembly and commissioning of RTG and RMG cranes in Zhangjiagang port production base.
The RTG, RMG cranes are employed to the handling of international standard containers, which adopt advanced external parts and control systems to meet the needs of high efficiency and frequent operations.
1 Hoisting and hoisting are classified as special operations, hoisting workers are special operations workers, and it is necessary to carry out safety technical training. Only after passing the examination of the Labor Bureau and obtaining the qualification certificate, can they start to work.
2 When lifting and hoisting operations, use special personnel to command. The lifting and lifting command languages used by the commanding personnel for gesture signals, sound signals, semaphore signals, etc., are required to implement the consistent standards of national regulations.
3 The Crane must be fully inspected and repaired before use, safety protection equipment must be complete and easy to use, and it is prohibited to use equipment that does not meet safety requirements.
4 The personnel involved in the lifting and hoisting operations shall have a clear division of labor, unanimously obey the commands of the commander, and prohibit independent actions and multi-headed commands. .
1 No-load experiment should be carried out before the operation, and the operation can only be carried out after the work is normal.
2 The lifting point should coincide with the vertical line of the center of gravity of the heavy object during operation, and it is necessary to lift it straight. When the hanging object is walking, the height of the hanging object must exceed the height of the object on the ground by more than 0.5 meters, and it is forbidden to pass by people. Hanging objects shall not stay in the air for a long time.
3 After the operation is over, the electric hoist should be parked in a safe position, the hook should be raised, and the power supply should be blocked.
Yuantai made several overhead cranes for CSSC. The images show the delivery of overhead crane. The No.2 overhead crane is a 200/32t capacity overhead crane with span 41.3m and double trolleys. And No. 1 overhead crane have been installed and and debugged.
Yuantai Crane is leading crane manufacturer in China providing overhead crane, gantry crane, project crane, jib crane, container crane, metallurgy crane, etc.
At the beginning of the work, support the wire rope to hoist the grab in a proper position, and then lower the opening and closing wire rope. At this time, the weight of the lower cross beam forces the large axis of the cross beam below the bucket to open the bucket. When the bucket is opened to the two lugs When the bumps collide, the bucket opens to the maximum limit.
When the bucket is opened, the center distance between the upper beam pulley and the lower beam pulley is increased, and then the wire rope is supported to fall, and the opened grab is dropped on the loose accumulation to be grasped, and then the opening and closing wire rope is retracted to turn the upper beam pulley The center distance with the lower beam pulley is restored to the original position, thus completing the material grabbing process. The closed bucket is full of materials, and finally the opening and closing wire rope is lifted, the entire grab is also hoisted, and moved to the required unloading site by a crane, and the grab is opened to unload the grabbed materials.
With the vigorous development of the chemical industry, there are more and more explosion-proof electric hoists and various explosion-proof lifting tools. In recent years, there have been frequent explosions in chemical plants. Among them, the explosion-proof electric hoist accident is caused by a variety of reasons, and the supervision of pressure equipment may also be involved. Below is an example:
After the accident:
In November 1998, two explosion-proof electric hoists were used in the renovation project of the acetylene station of a certain factory. Since the electric hoist is used on the acetylene gas generator, it has no explosion-proof effect on acetylene gas, water gas, hydrogen and other gases, so the electric hoist is put into use in the first ten days of each month. When the lifting calcium carbide is added to the acetylene generator, the acetylene gas rushes to the top of the electric hoist and penetrates the explosion-proof junction box of the contactor on the electric hoist, causing a strong explosion. All electrical wiring at the scene burned down.
Cause Analysis:
the measures taken:
In order to make the explosion-proof electric hoist operate safely in the production place full of acetylene gas for a long time, the four AC contactors on the motor must be moved to the explosion-proof or explosion-proof power distribution room. Among the electrical components on the electric hoist, in addition to the frequent electrical sparks between the contacts of the AC contactor, other explosion-proof electrical components (such as electromagnetic brake coils, limit switches, motors, etc.) will not produce electrical sparks during normal operation. If a method can be found to distinguish between the AC contactor and the explosion-proof contactor on the electric hoist, this electric hoist will be able to operate safely for a long time in a production environment full of acetylene gas.
The acetylene station did not take the above measures due to improper selection of explosion-proof products. At the same time, moving the AC contactor on the explosion-proof electric hoist to the explosion-proof or explosion-proof power distribution room also facilitates the daily maintenance of electrical equipment. The switches of the original explosion-proof electric hoist installed at the production site are often not overhauled and regularly inspected. The practice of the new product proved that after the switch was moved into the explosion-proof power distribution room, the accident rate was reduced by more than 80%.
1 No-load experiment should be carried out before the operation, and the operation can only be carried out after the work is normal.
2 The lifting point should coincide with the vertical line of the center of gravity of the heavy object during operation, and it is necessary to lift it straight. When the hanging object is walking, the height of the hanging object must exceed the height of the object on the ground by more than 0.5 meters, and it is forbidden to pass by people. Hanging objects shall not stay in the air for a long time.
3 After the operation is over, the electric hoist should be parked in a safe position, the hook should be raised, and the power supply should be blocked.
MD1 wire rope electric hoist has the characteristics of compact structure, light weight, safety and reliability.
Primary use: MD1 wire rope electric hoist can be installed on various cranes or suspended on I-beams, and can lift heavy objects in a straight line or a curve. The fixed Wire Rope Hoist can be installed on a fixed bracket for vertical or different angle hoisting. MD1 electric wire rope hoist is widely used in the working conditions of enterprises, railways, wharfs, warehouses, yards and other places. It is an indispensable machine for improving working conditions and improving labor efficiency.
The wire rope hoist is a kind of electric hoist with large market demand, and it is a well-known product in the electric hoist. MD1 electric wire rope hoist is a commonly used electric wire rope hoist. The MD1 electric wire rope hoist has some vulnerable parts, which are prone to problems during use.
The main wearing parts of MD1 electric hoist include rope guide, sealing ring, brake ring, high-speed pinion at the shaft end of the rotating motor, etc. These parts are easily damaged during normal use. These wearing parts are not covered by the warranty and belong to normal wear and tear.
Vulnerable parts should be checked daily and replaced in time to avoid more serious problems. Many machines have wearing parts, but this does not mean that these wearing parts can be replaced with inferior quality. The wearing parts of Dongqi MD1 electric hoist are of excellent quality. Even so, their “vulnerable physique” cannot be changed, and it can only be said that they can properly extend their lifespan.
Crane rollover accidents have been reported on the Internet from time to time, which is indeed something worthy of our attention. Safety comes first. Regarding useful methods to prevent the crane from tipping over, the following points should be noted:
Compact design
The advanced design concept enables the European-style double beam crane to have a lightweight structure and excellent performance. At the same time, it reduces the operating limit distance of the hook to a certain extent, effectively improves the space utilization rate, and also enables customers to reduce plant investment costs. The use of Yuantai European-style double-beam crane will bring you a richer return on investment.
Fast and stable loading
The standard configuration of the double-beam European-style crane is that both the trolley and the large trolley are frequency-converted, which makes the driving run smoothly, and the positioning is fast, which effectively solves the sway of the reproduced object.
Safer and more reliable, with maintenance-free design
The European-style double-beam crane adopts advanced technology from the design and selection of materials to the manufacturing process, which shows its superiority especially during frequent operations. The perfect brake system greatly improves safety and reliability. The high-performance brake adopts dust-proof design, can be automatically adjusted, and has a safe service life of more than 1 million times. The moving gear is processed accurately, and the tooth surface is hardened and ground, which can ensure the long-term trouble-free operation of the European-style crane.
Better performance
As an important logistics equipment, European-style double-girder cranes can cause incalculable losses due to production shutdowns or malfunctions. European-style double girder cranes adhere to the consistent excellent quality of products and will be your high-quality choice in the logistics field.