Regarding the rope, in terms of its ductility, it is mainly divided into two types, one is the dynamic rope, the other is the static rope. Many people do not understand the real meaning of the dynamic rope and the static rope, so Chenghua manufactures it according to the high altitude. The safety rope of the fall arrester will give you a popular science about static rope and dynamic rope.
Ductility may be understood by many people, that is, the rope can be stretched under the action of external force. For the same force, the longer the rope is stretched, the higher the ductility is. The higher the ductility, the greater the elasticity of the rope. In layman’s terms, the more elastic ropes are called “power ropes”. The smaller the elasticity, the almost unchanged under the action of external force, which is called “static rope”. So which of the two ropes is better?
There is no absolute difference between dynamic ropes and static ropes, because they act on different environments. The purpose of dynamic ropes is to absorb most of the energy through the rope under high impact force, and play an absolute role. The best cushioning effect, such as the rope used in bungee jumping, is the power rope for this purpose.
The static rope is to maintain the same height as far as possible under the action of external force, and this advantage of the static rope is clearly reflected in the hoisting operation. Through the low elasticity of the rope, the hoisting operation is guaranteed. Do it safely.
So here comes the problem. At present, most of the high-altitude fall arresters use the connection method of wire rope. You must know that the wire rope has no elasticity, which means that in the event of a high-altitude fall, the wire rope has no way to absorb any ability, and the impact The force will be attached to the human body almost unabated. But many fall arresters still use wire ropes. Why?
In fact, this problem is easy to understand, because the fall arrester is different from bungee jumping. The design of the high-altitude fall arrester is very precise. At the moment of falling, the ratchet and the pawl can complete the self-locking within 0.2 seconds, thereby ensuring that the production of small Once the fall arrester adopts a more elastic rope, it cannot prevent the drop from happening within 0.2 seconds, resulting in a great safety hazard.
Therefore, the high-altitude fall arrester uses more “static rope” wire ropes. rather than “power rope”
Post time: Aug-31-2022