Cause analysis of common damage to belt conveyor belts below 100 meters

The belt conveyor is one of the most important transportation equipment in the coal mining industry. The conveyor belt is an important part of the belt conveyor. The mechanism is also the carrying mechanism. The quality of the conveyor belt has a great impact on the performance of the belt conveyor. In addition, the price of the conveyor belt is also more expensive, accounting for about 50% to 70% of the cost of the entire conveyor.

Practice has shown that the replacement of conveyor belts in transportation is mostly caused by the damage of the conveyor belt. Reasonable judgment and attempts to extend the service life of the conveyor belt have important practical significance for ensuring safe production and reducing transportation costs.

1 Reasons for conveyor belt damage

The laying length of the conveyor belt is large, especially in the underground, and the working conditions are poor and it is easy to cause damage. The main forms and causes of conveyor belt damage are:

1) The overlap height between the transfer machine and the belt conveyor tail is not enough, or the tail buffer roller loses its elasticity. When a large piece of material falls from the transfer machine, it will form a large impact and break the upper cover of the conveyor belt. , Even the core of the belt is broken, forming a hole. Especially when the material is entrained with sharp objects, such as steel bars, it is easy to scratch the conveyor belt, causing the conveyor belt to tear longitudinally.

2) The belt edges of the conveyor belt are worn. It is mainly due to the misalignment of the conveyor belt, which causes friction between the conveyor belt and the frame, and causes the belt edge to be fuzzed and cracked. The belt edge is the easiest to damage because it has a small area and is not wear-resistant. After the belt edge is worn, water is immersed from the damaged place, and the canvas layer will gradually rot over time, and the steel rope core will corrode and break.

3) The conveyor belt overlap does not meet the requirements. If the joints are uneven, uneven or straight, the conveyor belt will be broken due to uneven force.

4) The conveyor belt is of poor manufacturing quality or improper use and storage. For example, the conveyor belt used on the ground is exposed to the sun for a long time in summer, and the surface of the conveyor belt is frozen in winter, which causes the rubber of the conveyor belt to harden and age. In addition, due to the excessive tension of the conveyor belt or the too short laying distance of the conveyor belt during use, the number of deflection exceeds the limit, and it is also easy to cause the conveyor belt to age and damage in advance.