1. The limiter of the bridge crane is the main accessory responsible for controlling the operation of the hook of the bridge crane in the process of lifting and lowering. If the joint of the limiter is stuck, it is equivalent to failure, which will cause the main hook to continue to rise in the process of lifting, so that the steel wire rope can not withstand the impact of pressure, directly break, the hook is damaged, so that the goods fall, causing unnecessary life safety problems.
2. Because the hook of the bridge crane is pulled by the pull of the controller handle, if the driver does not pull the controller handle to zero during the working process, the hook will continue to rise, causing personnel accidents.
3. Because the crane is used for a long time, and the staff do not regularly check and repair it during the work, the limiter hides the hidden danger of failure, resulting in the phenomenon of jacking.
4. In the process of work, the staff mistakenly adjusted the lowering operation to the raising operation, resulting in the failure of the limiter, and at the same time, they did not activate the emergency driving switch in time, resulting in the jacking of the suspended objects.
5. In the process of installation, the installation staff forgot to modulate the corresponding sequence of the descending and ascending controllers, so that the contacts of the descending and ascending limiters failed, resulting in the jacking phenomenon.
6. After a long time of use, the screw on the limiter is loosened, so that the contact block cannot contact the limiter, resulting in jacking.
