The vibrating screen is a sorting device that can be classified, dehydrated, deslimed and sorted. The vibration of the sieve body is used to loosen, stratify and sieve the material to achieve the purpose of material separation. The screening effect of the vibrating screen not only has a great impact on the value of the product, but also has a direct impact on the efficiency of the next operation, and plays an important role in the production and quality of the gravel production line. The vibrating screen has simple structure, stable operation, high screening efficiency and large processing capacity. The screen mesh is the main working part of the screening process and the main wearing parts. After the screen is worn or damaged in the long-term operation, it will cause confusion of materials at all levels and seriously affect the quality of the finished product; improper operation and use will cause the screen to break too fast. Today, let us know the reasons and solutions for the excessive damage of the vibrating screen.
1. Reason: The screen generally has an upper sieve layer and a lower force layer. It is required that the two layers are closely adhered to each other. If the screen pre-tensioning process is poor, when the force layer at the bottom of the screen is tight. If the sieve layer is not tightened, the distance between the screen and the vibrating screen is too large, and the contact part of the screen frame cannot be effectively pressed, which is one of the reasons for the screen damage being too fast.
Solution: Check the progress of the screen frequently, check whether the screen is compacted, ensure the tension of the screen, reduce the power of the screen, and ensure that the screen layer on the screen and the lower layer of the force are tightly fitted.
2. Reason: During the screening process of the vibrating screen, the width of the vibrating screen determines its processing capacity, and the length determines its screening effect. If the feeding amount is too large during the feeding process of the vibrating screen, the equipment cannot screen, or uneven feeding width, causing material accumulation, it is easy to make the screen unevenly stressed and accelerate the damage.
Solution: Dispense the material evenly when placing the material. In the feeding mode with strong impact, the buffer hopper is added to the vibrating screen, and the direct impact of the material on the screen will consume the exciting force generated by the vibration source, which is more likely to cause damage to the screen and fatigue of the screen.
3. Reason: If the quality of the screen is not reached, it will be easily damaged under the action of high strength, especially when screening large materials such as large stones, if the quality of the screen is not up to the material. Screening requires tearing or abrasion under high-intensity vibration and friction.
Solution: High-manganese steel wire mesh with high elasticity and high wear resistance should be selected, which is not only durable, but also has a long service life and higher screening efficiency.
4. Reason: If the screen is not tensioned, during the operation of the equipment, high amplitude vibration will cause the screen to vibrate, usually broken or damaged along the edge of the screen or the edge of the bead, and because the screen is not tensioned, the sieve The level of the surface is not enough, and the screen is easily deformed, and the material is liable to accumulate at a certain position, causing uneven stress on the screen and causing damage.
Solution: When installing or replacing the screen, 3-4 people should work at the same time, spread the screen on the screen frame, then put the screen compression ring, and use the screw symmetry according to the vertical direction of the screen. Fix it. After the screen is not folded and evenly tightened, insert the screws into the screw holes and slowly rotate them one by one.