Treatment of belt wear phenomenon of belt conveyor
Date：2019-06-17 11:39 Source：未知Views:
In the mine field, the main purpose of the belt conveyor is to transport materials and articles. There are two main delivery items. The first is the crushed material; the second is the material of the finished product.
The wide application of belt conveyor has three advantages. The first advantage is that the belt conveyor has a long transport distance; the second advantage is that the belt conveyor has a large volume of material; the third advantage is that the belt conveyor is capable of efficiently transporting the material.
The design and application of belt conveyors in China are relatively late. The belt conveyors were designed only in the 1980s. At present, the belt conveyors in China have been designed very advanced and have a leading position in the world. The transport speed of belt conveyor in China can reach 5.9m/s, mostly from 1.5m/s to 4.1m/s. Due to the particularity of long-distance belt conveyor, the cost of the conveyor is increasing continuously, and the part of the cost increase is the conveyor belt. So to reduce the cost of the belt conveyor, we have to find a way on the conveyor belt.
1. Conveyor belt in belt conveyor
Conveyor belt is the standard elastic equipment, is the most important part of the conveyor, is a typical constant torque load; it is also one of the most expensive components, its price accounts for 1 / 4 ≤ 1 / 2 of the total price of the conveyor. In belt conveyor, conveyor belt is not only traction component, but also bearing component, which not only plays the role of transmission power and transportation, but also plays the role of supporting material load. The conveyor belt is composed of a core and a covering layer, which bears tension, while the covering layer protects the core from damage and corrosion.
2. Causes of wear and tear of conveyor belt during operation
Because of the long distance and uninterrupted transportation of materials, the belt fatigue phenomenon will appear to a great extent. Once this fatigue phenomenon can not be fundamentally solved, there will be wear and tear of the conveyor belt. The wear causes of conveyor belt in belt conveyor are analyzed from three aspects. The first aspect is that the wear of the vulcanized joint of the conveyor belt at the joint can lead to the wear of the conveyor belt. The second aspect is that the wear of the skirt plate in the belt conveyor leads to the wear of the belt. The third aspect is the wear guide in the middle position of the conveyor belt in the belt conveyor. Wear and tear of conveyor belt.
2.1 the wear of the vulcanized joint of the conveyor belt at the joint can lead to the wear of the conveyor belt.
In the process of blocking the conveyer belt, the vulcanization is a kind of work which will not be much. Because the material of the conveyer belt is different from the improper vulcanization mode, the vulcanization joint at the joint can be worn, and if the treatment is not carried out in time, the wear of the joint can be increased. The wear resistance of the conveying belt is deteriorated, the local abrasion is caused, the steel wire rope of the conveying belt and the nylon core of the conveying belt are seriously exposed, the service life of the conveying belt is influenced, and the operating cost of the enterprise is increased.
2.2 The wear of the apron part in the belt conveyor results in the wear of the conveyor belt
on the basis of the condition of the peripheral leakage material in the material transportation process of the belt conveyor, a plurality of belt conveying opportunities are provided with a material guide groove to carry out the reverse movement of the materials, The edge of the skirt of the guide chute during the transport of the belt conveyor will cause wear to the conveyor belt of the belt conveyor. The most severe part of the belt's wear is the adhesive layer on both sides of the conveyor belt. The longitudinal direction of the conveyor belt will expose the wire rope of the conveyor belt or the nylon core of the conveyor belt. In this process, the belt conveyor will be present when the wire rope or the nylon core of the conveyor belt is present .
Once the material leakage of the fixed point of the belt conveyor occurs, it will cause a certain degree of impact on the belt of the belt conveyor, and the final result of this impact will be very serious wear and tear to the belt. There are two main results of this wear condition. The first is the wear of the belt along the running direction of the belt conveyor, which leads to the fracture of the wire rope or the nylon core of the belt. The second result is that the repeated uninterrupted leakage of the material will lead to the superimposed belt in the middle of the conveyor belt, which will seriously affect the operation and production of the belt conveyor.
3. Treatment method of belt wear
In the process of production, a very important way to improve the production efficiency is to properly protect the wear and tear of the conveyor belt, at the same time, we should try our best to reduce the change frequency of the conveyor belt and ensure the normal operation of the production in a certain period. The treatment method of belt wear in belt conveyor is mainly expounded and analyzed from four aspects today. The first aspect is to optimize the vulcanization conveyor belt technology, local thermal vulcanization technology. The second aspect is to optimize the vulcanization conveyor belt technology, local cold vulcanization technology. The third aspect is to adopt the bureau in the process of bonding the conveyor belt. Cold adhesive technology. The fourth aspect is the use of spraying repair method in the repair process of conveyor belt.
3.1 Optimization of vulcanization conveyor belt technology for belt conveyor, local thermal vulcanization technology
The main construction object of local thermal vulcanization technology of conveyor belt is the vulcanization wear of small area conveyor belt. In the actual production, the local vulcanization joint is worn out, so it is very important and practical to use the vulcanization heat treatment technology of conveyor belt. The treatment of thermal vulcanization can also effectively restore the operation and performance of the conveyor, but this new technology has a serious drawback. In the process of dealing with the local small area wear of the vulcanized joint of the conveyor belt, a lot of manpower and material resources are needed, and the time consumed is very long. Therefore, when using this technology, it is necessary to evaluate the input-output ratio first and refer to the actual situation on the spot. The situation makes the right choice.
3.2 Optimization of belt conveyor vulcanization conveyor technology and local cold vulcanization technology.
The local cooling treatment of conveyor belt is mainly aimed at the grinding of wear position. After grinding, the cold-treated vulcanizate is evenly smeared on the worn surface, which can also effectively restore the performance of the conveyor belt. The disadvantage of this technology is that the implementation time is too long, and it takes more than 12 hours at outdoor room temperature. After practical feedback, although this method is effective, but the position quality of processing is poor.
3.3 in the process of bonding conveyor belt, local cold adhesive technology has four outstanding advantages.
The first advantage is that the material input is small in the repair process; the second advantage is that the time required for the repair is short; the third advantage is that after the repair, the conveyor has stronger wear resistance; and the fourth advantage is that the conveyor belt has good reinforcement after the repair. This method is therefore widely used in practical use.
3.4 the method of using spraying to repair the conveyor belt
This technique is applicable to the local wear problem of continuous pieces. This technology adopts special equipment spraying polyurea elastomer technology, mixes two kinds of liquid materials through special equipment, then uses high pressure spraying on the belt wear surface, calculates the thickness according to the wear degree to form a wear-resistant layer.