Belt conveyors play a very important role in material transportation. Based on this important role, we need to pay attention to the operation of the belt conveyor during the operation of the belt conveyor. The more vulnerable part of the belt conveyor is the conveyor belt on the equipment. It should be noted that the conveyor belt in the belt conveyor is very expensive, and the high quality conveyor belt is more expensive, so it is used for the belt conveyor. The operation and maintenance costs must pay attention to the wear of the conveyor belt, and it is best to effectively prevent or reduce the wear of the conveyor belt. Today, we will systematically analyze the various types of belt conveyor belts and the causes of wear.
In the mining sector, the main purpose of belt conveyors is to transport materials and items. There are two main items to transport. The first is the broken material; the second is the finished material.
There are three main advantages to having a wide range of belt conveyors. The first advantage is that the belt conveyor has a long transport distance; the second advantage is that the belt conveyor has a large amount of material transport; the third advantage is that the belt conveyor can efficiently transport the material.
The design and application of belt conveyors in China was relatively late. The design of belt conveyors began in the 1980s. At this stage, the design of belt conveyors in China has been very advanced and has a leading position in the world. status. The conveyor speed of belt conveyors in China can reach 5.9m/s, mostly from 1.5m/s to 4.1m/s. Due to the special nature of the long-distance belt conveyor, the cost of the conveyor is increasing, and the part with increased cost is the conveyor belt. Therefore, in order to reduce the cost of the belt conveyor, we have to find a way on the conveyor belt.
1. Conveyor belt in belt conveyor
The conveyor belt is a standard elastomeric device and is the most important component of the conveyor. It is a typical constant torque load; it is also one of the most expensive components, and its price accounts for 1/4 to 1/2 of the total price of the conveyor. . In the belt conveyor, the conveyor belt is both a traction member and a load-bearing member; it not only plays the role of transmitting power and transportation, but also acts as a supporting material. The conveyor belt is composed of a core body and a cover layer, and the core body is subjected to tensile force, and the cover layer protects the core body from damage and corrosion.
2. Reasons for the wear of the conveyor belt during operation
Belt conveyors will cause the conveyor belt to fatigue to a large extent due to the long-distance uninterrupted transportation of materials. Once this fatigue phenomenon is not solved fundamentally, the belt wear will occur. Regarding the wear and tear of the conveyor belt in the belt conveyor during operation, Xiaobian mainly analyzes from three aspects. The first aspect is that the wear of the vulcanized joint at the joint of the conveyor belt in the belt conveyor can cause wear of the conveyor belt. The second aspect is that the wear of the skirt portion of the belt conveyor causes wear of the conveyor belt. The third aspect is the wear of the conveyor belt in the middle of the conveyor belt in the belt conveyor.
2.1 The belt in the belt conveyor wears the vulcanized joint at the joint, which can cause the belt to wear.
In the process of bonding, the vulcanization is a kind of work that must not be done. Due to the different materials of the conveyor belt, improper vulcanization is adopted, and the vulcanized joint at the joint will be worn. If it is not treated in time, The wear at the joint will be intensified, resulting in poor wear resistance of the conveyor belt, local wear and tear, severely exposing the steel wire rope of the conveyor belt and the nylon core of the conveyor belt, etc., which affects the service life of the conveyor belt and increases the enterprise's Operating costs.
2.2 Wear of the skirt part of the belt conveyor causes wear of the conveyor belt
Based on the peripheral leakage condition during the material transportation process of the belt conveyor, many belt conveyors set the guide trough to carry out the material reversal. Once the design of the skirt of the guide trough is unreasonable or the installation is unreasonable, it will appear. During the transport of the belt conveyor, the skirt edges of the guide troughs wear on the conveyor belt of the belt conveyor. In this case, the most severe part of the conveyor belt wear is the rubber layer on both sides of the conveyor belt. In the longitudinal direction of the conveyor belt, the wire rope of the conveyor belt or the nylon core of the conveyor belt or the like is exposed. In this process, when the steel wire rope or the nylon core of the conveyor belt is erected, the condition that the roller of the belt conveyor wraps around the wire rope occurs, which seriously causes the wire rope of the conveyor belt to be torn off, resulting in the entire belt. Wear and tear. The occurrence of this situation will seriously affect the operational safety and production of the belt conveyor.
2.3 Wear in the middle of the conveyor belt in the belt conveyor causes wear of the conveyor belt
Once the belt conveyor has a fixed point material leakage, it will cause a certain degree of impact on the conveyor belt of the belt conveyor. The end result of this impact is very serious wear on the conveyor belt. There are two main outcomes in this wear condition. The first is the wear of the conveyor belt along the running direction of the belt conveyor, causing the steel wire rope of the conveyor belt to break or the nylon core to break. The second result is that repeated uninterrupted leakage of material can cause the overlap of the conveyor belt in the middle position, seriously affecting the operation and production of the belt conveyor.
3, the treatment method of conveyor belt wear
In the process of production, a very important way to improve production efficiency is to properly protect the wear of the conveyor belt, and at the same time reduce the frequency of change of the conveyor belt as much as possible to ensure normal operation within a certain period of time. Regarding the treatment method of belt wear in belt conveyors, Xiaobian is mainly elaborated and analyzed from four aspects. The first aspect is the technology to optimize the belt conveyor vulcanization conveyor belt, local thermal vulcanization technology. The second aspect is the technology to optimize the belt conveyor vulcanization conveyor belt, local cold vulcanization technology. The third aspect is the use of a local cold bonding technique in the process of bonding the conveyor belt. The fourth aspect is the use of spray repair in the repair of the conveyor belt.
3.3 In the process of bonding conveyor belts, the local cold-adhesive technology of the local cold-adhesive technology conveyor belt has four outstanding advantages.
The first advantage is that the material input is small during the repair process; the second advantage is that the time required for repair is short; the third advantage is that the conveyor has strong wear resistance after repair; the fourth advantage is the conveyor belt It has a good reinforcement after repair. Therefore, this method is widely used in practical use.
3.4 Method of using spray repair during the repair of the conveyor belt
This technique is suitable for the local wear problem of continuous filming. The technology uses special equipment to spray polyurea elastomer technology, the two liquid materials are mixed through special equipment, and then sprayed onto the wear surface of the conveyor belt by high pressure, and the thickness is measured according to the degree of wear to form a wear layer.