In the use of the hook group, the form of the damage ring visible from the appearance often has the wear of the hook portion and the breakage of the pulley rim.
In the use of the hook group, the form of the damage ring visible from the appearance often has the wear of the hook portion and the breakage of the pulley rim.
The wear of the hook portion is a normal phenomenon, mainly for the weight to be lifted, it is necessary to adjust the center of gravity by itself, forcing the wire rope or spreader to slide and wear at the hook.
The rim of the pulley is broken, mainly caused by the collision. The reason is that the hook group does not rise to the necessary height, the car is unsteady or the slanting sling, and the heavy hook causes a strong swing to cause the pulley to collide with other objects. The driver is also in violation of the operating procedures, does not check the lifting position of the limit switch, does not pay attention to the lifting of the hook, and causes the hook to "govern", so that the pulley is damaged.
Hidden dangers that are not easy to occur in the hook group are often the bottom diameter of the tail thread of the hook or the empty sipe between the thread and the rod, and cracks occur due to stress concentration. The hook nut should be removed during maintenance, and the dirt on the upper side should be cleaned and carefully checked. Also check the hook nut and hook bolts frequently, or other parts of the connection method are loose or cut, to prevent the hook from falling off. Also check the corrosion of the hook nuts at the end of the hook and apply grease if necessary.
The insulating mats and insulating sleeves on the insulating hook group shall not be broken. They should be inspected frequently to eliminate dust in time and should be dried immediately after damp. Lubricate the lubrication points and hinge points regularly, and the thrust bearings under the hook nuts should be refueled regularly.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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