Gantry cranes often experience twisting when lifting heavy loads, with no warning signs. The rotation of the hook can disrupt the normal operation of the lifting process and severely threaten the safety of the operators. There are various reasons for the hook to twist, which can be specifically analyzed into 7 categories.
The greater the weight a single wire rope can bear, the higher the likelihood of the hook rotating.
2. The hook wire rope is woven in odd numbers, which is easier for the hook to rotate than even numbers. Moreover, with fewer matching wires, the likelihood of the hook rotating is greater.
3. The larger the crane, the greater the lifting height, meaning the longer the steel wire rope between the top of the boom and the hook, resulting in a higher possibility of the hook rotating.
During the lifting process, external forces such as human or wind pushing the hook cause it to rotate, leading to unstable operation by the driver, which results in the swinging of the hook and heavy load, causing the hook to rotate.
5. The manner in which the hook is wrapped causes the hook to be unbalanced, leading to rotation and other issues.
The smaller the外形尺寸 of the hook assembly and the size of its pulley, the greater the likelihood of the hook rotating.
The speed of the crane's lifting and lowering hook operation is uneven, particularly when heavy loads are being lifted off the ground, increasing the likelihood of the hook rotating.