What should we pay attention to when using elevator wire rope?

Steel wire rope is a load-bearing element in the elevator, which bears almost all the weight of the elevator. The quality of steel wire rope will directly affect the safety of elevator operation. The correct selection, use and maintenance of elevator traction wire rope is not only related to the safety and normal operation of the elevator, but also very important to prolong its own service life.

Structure of elevator wire rope

Steel wire rope is a rope made of several steel wires twisted according to certain rules. According to different classification methods, it can be divided into various forms of steel wire rope, but in essence, it is composed of rope making steel wire, rope core and rope grease.

Generally speaking, the service life of steel wire rope will be greatly affected by dynamic tension. At the same time, the service life of steel wire rope will also be affected by the uneven load of steel wire rope. Even for elevators of the same batch and manufacturer, the service life of some elevator wire ropes is 5 years, while that of some elevator wire ropes may be 10 years. The main reason is not only the influence of the quality of the wire rope itself, but also the uneven tension of the wire rope.

Reasons for uneven tension of elevator wire rope

There are two main reasons for the uneven tension of elevator traction wire rope: first, after the elevator is running, the structural elongation of each wire rope may be inconsistent; Second, when installing the elevator, there may be inconsistent static tension of the foundation.

Whether in the elevator inspection stage or the elevator installation stage, it is only necessary to observe the height of the tension adjustment spring, and the uneven tension of the elevator wire rope will be checked. At the same time, after the elevator has been running for a period of time, the structural elongation of the elevator traction wire rope will occur, resulting in great changes in the tension of the wire rope. These factors may cause uneven tension of the elevator wire rope.

Influence of uneven tension of elevator wire rope

Uneven tension of elevator wire rope will cause uneven wear of rope groove and wire rope; If uneven wear exists for a long time, it will inevitably lead to different parameters such as circumferential speed (each steel wire rope), diameter size (each groove pitch circle), and then induce obvious relative sliding of the steel wire rope in the rope groove.

As we all know, in the process of elevator operation, the running speed of the steel wire rope is inversely proportional to its own wear, but the elevator operation requires that all the steel wire ropes can run the same stroke. In this way, it is bound to make the two elevator steel wire ropes with different wear appear relative slip. In the long run, the wear of the steel wire rope will be further increased, and the wear will increase, It will increase the relative slip, resulting in a serious vicious circle.

The final result is that the degree of wire rope damage to the rope groove and its own wear will increase significantly, which will cause the rope groove to be completely scrapped or the wire rope to be completely unusable in a very short time.

Precautions for installing steel wire rope

Replacing elevator steel wire rope is a complex and high-intensity work involving many safety factors. In order to work safely and efficiently and avoid safety accidents, we need reasonable and scientific management and construction.

Attention shall be paid to the construction site:

1. Workers working at heights must wear safety helmets, safety belts and complete personal protective equipment. Those who are not physically fit are strictly prohibited from working at this position.

2. Obvious warning signs must be set up on the construction site. If public places are involved, protective fences must be set up to prevent irrelevant personnel from entering the construction site at will, so as to prevent non operators from entering the construction site at will and avoid accidental injury.

3. Each post shall wear walkie talkie, and it must ensure clear communication and clear instructions during operation.

4. During the construction process, the personnel must obey the operation instructions of the only engineering guidance. No one shall issue the operation instructions at will or work in violation of the instructions issued by the engineering guidance without authorization, so as to ensure the effectiveness of the response mechanism.

Construction site survey and tool preparation:

1. The construction personnel shall conduct field survey on the elevator shaft, corridor, landing and machine room on site in advance to prevent injury caused by falling, falling, electric shock and involvement in equipment.

2. The lighting of machine room, shaft and corridor shall be sufficient.

3. There are no obstructions at the moving parts of the operation.

4. The platform formed in the machine room shall be equipped with protective rods.

5. There should be a safe distance from the rotating parts.

6. The wiring of equipment in the machine room shall be standard and safe.