In addition to the deviation fault, the conveyor belt is prone to tear damage in the process of use. The common tear ways are longitudinal and transverse tear, and the transverse tear is generally caused by the quality problems of the conveyor belt itself. Next, the manufacturer of Emerson conveyor belt will introduce the causes and solutions of longitudinal tear of conveyor belt.
The longitudinal tear of conveyor belt mainly occurs at the loading point at the tail of the machine. The main reason is that the materials falling from the blanking port often carry foreign matters, which usually have sharp edges and are easy to damage the conveyor belt. When these foreign matters fall down and get stuck on the blanking port, shelf or idler, they will form the top pressure and continuous scratch on the surface of the conveyor belt, and the more tightly they get stuck, the greater the pressure on the conveyor belt will be, so that the scratch on the conveyor belt will be deepened rapidly, and finally the conveyor belt will be pierced and torn. If found in time, immediately brake the belt, can also reduce the loss. If not found in time, it will cause serious consequences.
1、 Causes of belt tear
1. Belt tearing caused by impurities in conveying materials
When the conveying materials are mixed with foreign matters, such as ironware, wood sticks and so on, they will cause partial damage to the belt body when they fall. In serious cases, they will directly penetrate the conveyor belt and get stuck in the funnel, chute, frame or idler (g) ǔ n) On the other hand, the conveyor belt runs forward at high speed, causing longitudinal tearing of the conveyor belt.
There are large pieces of material in the material, which are stuck in the funnel baffle and buffer idler (G ǔ n) Once the surface of the conveyor belt is punctured and scratched, the wound will deepen rapidly, and finally the conveyor belt will be scratched through to form a tearing belt. From the micro structure of rubber conveyor belt, the conveyor belt is mainly composed of skeleton material, covering layer and backing material, of which the covering layer is the key part to determine its performance and application. According to the different raw materials used in the covering layer, the conveyor belt industry can be divided into two categories: heavy conveyor belt and light conveyor belt. The former uses rubber (including natural rubber and synthetic rubber) as the main raw material, so it is also called rubber conveyor belt, and its application scope is concentrated in heavy industry and infrastructure construction; The latter mainly uses polymer materials, mainly used in food, electronics and other light industries. Therefore, the key to prevent the conveyor belt from tearing is to remove the large materials and foreign matters.
2. Belt tearing caused by improper installation of conveyor auxiliary equipment
In addition to the threat of the material itself, the drop of the conveyor belt itself is also a major cause of tearing in the transportation process. Rubber conveyor belt with tropical, wear-resistant belt, burning resistant belt, oil resistant belt, alkali resistant belt, alkali resistant belt, tropical, cold resistant belt and other characteristics. It is mainly used for solid material transportation in mining, metallurgy, iron and steel, coal, hydropower, building materials, chemical industry, grain and other enterprises. If the lining plate of vibration device, hammer head of pulverizer and adjusting block of blanking port fall off, the conveyor belt may be torn.
3. Belt tearing caused by imperfect structure of conveyor
The design of the belt conveyor is unreasonable, the drop of the blanking point at the tail of the machine is large (the maximum drop of the working area is nearly 10 meters), which causes the material to impact the lower conveyor belt at a high speed, and it is easy to insert the conveyor belt at the blanking point, causing the conveyor belt to tear.
4. Belt tearing caused by blockage
The transfer chute is small, which is easy to hinder the passage of materials and impurities, resulting in the tearing of the conveyor belt.
5. Intermediate idler (g) ǔ n) Tear caused by falling
The conveyor belt is directly pressed on the supporting intermediate idler (g) ǔ n) The heavy load makes the conveyor belt press the support tightly, and the support cuts through the conveyor belt like a knife, causing tearing.
6. Tear at nose
Because the machine head is full of materials, the materials are wedged into the connecting beams on both sides of the drum and the machine head, resulting in belt tearing; Or head sweeper scraper central hanging wire and other sharp foreign bodies, resulting in tearing.
7. Tearing caused by conveyor component failure
Such as idler (G ǔ n) If the end cover is not welded well, the rotating end cover cuts the conveyor belt like a rotating blade. When the wire rope in the conveyor belt breaks, the broken wire rope head will be exposed to the rubber cover from the belt joint, the sticking point or the serious wear (a basic type of component failure). When the exposed wire rope reaches a certain length, it may be twisted into the drum, idler, etc. with the operation of the conveyor belt, the wire rope will be pulled out from the cover rubber of the conveyor belt, causing core pulling tear.