Views: 0 Author: Site Editor Publish Time: 2022-11-29 Origin: Site
The lifting chain is an indispensable and important fishing gear for the crane. The length of the chain can be adjusted according to the lifting height of the lifting object, which plays an important role in improving the working efficiency of the crane and expanding the working range of the crane.
What care and maintenance measures are there for the lifting chain?
What is the scrapping standard for lifting chains?
What are the characteristics of the lifting chain?
1. The lifting chain should be mounted diagonally and vibration-free on the shaft. In the case of the same transmission assembly, the end faces of the two sprockets should be in the same plane. If the axle distance of the sprockets is less than 0.5 meters, the permissible deviation is 1mm; If the axle distance of the sprockets is more than 0.5 meters, the permissible deviation is 2 mm, but the phenomenon of friction on the side of the sprocket teeth is not permissible. If the two-wheel knitting is too large, it easily leads to chain breakage and accelerated wear. When replacing the sprockets, make sure that the offset is checked and adjusted.
2. The tension of the lifting chain should be reasonable. Tight tightening increases power consumption and the bearing wears out easily; The stiffness of the chain is: raised or pressed from the center of the chain, the axle distance of the two sprockets is approximately 2%-3%.
3. If the new lifting chain is too long or stretched after use, it will be difficult to adjust. The chain link can be removed depending on the situation, but must be an even number. The links should be guided through the back of the chain with externally inserted carriers, and the openings of the carriers should point in the opposite direction of rotation.
First, the permissible wear value of the lifting chain must not exceed 10% of the diameter of the circular chain rod or the thickness of the auxiliary equipment.
Secondly, the main ring should be scrapped from the plane in which the main ring is not bent if it is twisted by more than 10 degrees.
Third, no part of the lifting chain may be used if cracks, bends or twists occur and the phenomenon of jamming or stiff blocking between the ring hinges cannot be excluded.
Fourthly, the permanent elongation of both the chain and the single ring must not exceed 5% of the original length.
The lifting chain is made of alloy steel wire by braiding and welding with triple general pitch. And has passed the heat treatment and several correction tests. It has the characteristics of high strength, high toughness and wear resistance. The lifting chain is mainly used on tools and equipment such as hoists, rigging, scratches, etc. used and has the functions pulling, lifting and binding.
Qingdao Thinkwell Hardware, Machinery Co., Ltd.’s main products are 4.4 offroad recovery accessories, hoist and sling accessories, rod line hardware, marine hardware, etc. After more than ten years of development, the company has become a leader in the northern region of China in the field of 4.4 offroad salvage accessories.