The use and maintenance of chain hoists
'' '' In
'' '' lifting operations, chain hoists are used frequently.
'' '' Correct operation and reasonable maintenance , which can not only improve work efficiency, but also extend the service life of the hoist.
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Before using the chain hoist, a detailed inspection should be made, such as whether the hook, chain and shaft are deformed and damaged, whether the pin at the end of the chain is firmly fixed, and whether the transmission part is flexible. , whether the hand zipper has slipping or chain hanging phenomenon.
When using, first tighten the chain hoist slightly, check whether there are any changes in each part, and then try whether the self-locking condition of the friction plate, disc and ratchet ring (commonly known as the brake) is intact. Only after the inspection is confirmed to be in good condition can work continue.
When using, check whether the lifting chain is twisted. If there is any twisting, it should be wrapped clearly before use.
When lifting, the chain hoist cannot be used exceeding the lifting capacity. When using it in any direction, the direction of the zipper should be the same as the direction of the sprocket. Pay attention to prevent the hand zipper from coming out of the groove. The force of the zipper should be uniform and not too fast or too hard.
During the use of the chain hoist, the number of people zippering should be determined based on the lifting capacity of the chain hoist. If the hand zipper cannot be pulled, the cause should be identified and the number of people should not be increased to avoid accidents.
When the lifted heavy object needs to be stopped midway for a long time, the hand zipper should be tied to the lifting chain to prevent self-locking failure due to too long time.
The rotating parts should be oiled frequently to ensure lubrication and reduce wear. But do not leak lubricating oil into the friction bakelite to prevent self-locking failure.
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