The motion principle of the steel wire rope inside the casing of the speed differential anti fall device

The steel wire rope of the speed difference anti fall device has the characteristics of being extendable and retractable, which is the key to its ability to play a protective role in high-altitude operations. The term 'able to elongate' referred to here means that the steel wire rope can freely extend with the slow movement and lifting process of the worker; 'Can shrink' refers to the automatic recovery of the steel wire rope into the casing after the operation is completed and the load is released.

This type of telescopic movement is not uncommon and is reflected in common devices such as vacuum cleaners and spring hoists. Its movement principle is actually very simple, thanks to the coil spring device inside the speed difference anti fall device. When the steel wire rope is pulled out, the internal coil spring unfolds accordingly, and the kinetic energy is converted into elastic potential energy; And when the external force is released, the elastic potential energy is converted back into kinetic energy, and under the action of this energy conversion, the steel wire rope naturally recovers into the anti fall device shell.

Under the synergistic effect of the coil spring device and manpower, the steel wire rope can achieve free extension and contraction. However, it should be noted that the elasticity of the coil spring is not permanently fixed. Once its elasticity decreases or even disappears, the steel wire rope cannot be extended or retracted normally. At this time, it is necessary to replace the coil spring with the same specification and model to restore the equipment's function.