With the development of science and technology, steel cord conveyor belts have become the main conveying equipment in metallurgy, steel mills, coal mines and other industries due to their long transmission distance, heavy load, and large transportation volume. Various heavy industry enterprises have gradually increased their reliance on steel cord conveyor belts, and people are paying more and more attention to the quality and operating status of steel cord conveyor belts.
Long-term operation of steel cord conveyor belts is prone to failures such as wear, deformation, cord breakage, etc. Over time, the strength of the steel cord conveyor belt will decrease until it breaks. The most serious situation may cause casualties and bring huge economic losses to the company. In order to avoid the occurrence of the above situation, we briefly analyzes the reasons and solutions for the failure of the steel cord conveyor belt.
Taking coal mining as an example, the frequent failure of steel cord conveyor belts in coal mine conveyor systems is tearing or even breaking. The reason is that there are many other factors besides normal wear and tear that can cause this situation. In order to prevent the belt from breaking, the maintenance personnel of the conveyor system should try to extend the service life of the conveyor belt, reduce unnecessary downtime, and reduce the accident rate.
Steel cord conveyor belt joint twitching and cord breakage are common troubles. Serious damage to the cover rubber or corrosion of the joint terminal will cause the conveyor belt joint to twitch. Distinguish the trouble type can find out the cause of the trouble.
Due to space limit, the steel cores needs to bend repeatedly and constantly bypass the rollers and pulleys when the conveyor belt is running. The repeatedly bent belt core bears fatigue loads in each working cycle, which will cause repeated fatigue damage. The service life of the steel cord conveyor belt can be extended by comprehensively considering factors such as the conveyor’s driving device, installation size, and drum quality.
Steel cord conveyor belts are usually trough to increase the coal loading. When the steel cord conveyor belt transitions from the horizontal section to the trough section, the edges of the conveyor belt will bear greater tensile pressure than the middle. The uneven distribution of the belt tension will make the belt easier to break.
This will cause the conveyor belt to be damaged or even broken when it is stretched violently due to the sudden external pressure. At the same time, the material stuck in the guide trough or the distribution plate will also cause the risk of belt breakage.
Steel cord conveyor belts work for a long time, and the upper and lower covering layers will gradually appear wear, cracks, and aging. The cracking of the covering layer is caused by the joint cracks. If it is not repaired in time, the steel cord will be exposed, and water will penetrate into the conveyor belt and cause rust.
Early detection of steel cord fatigue, cord breakage, and twitching defects, and analysis and early treatment of the collected defects or damage can well avoid the occurrence of fracture accidents.