Solution To Plugging Fault Of Screen Mesh For Vibrating Screen2020-04-28

Summary

As the main wearing part of the vibrating screen, the screen mesh directly contacts the materials in the production process, which has an important influence on the production of the vibrating screen. Understand the correct selection and use of the s

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As the main wearing part of the vibrating screen, the screen mesh directly contacts the materials in the production process, which has an important influence on the production of the vibrating screen. Understand the correct selection and use of the screen, know the cause and solution of the screen plugging failure during the operation of the vibrating screen, and solve the problem quickly, which can save maintenance time, improve labor productivity, and ensure the orderly and normal production.

The screen is an important part of the vibrating screen. The correct selection and use of the screen directly determine the gradation and quality of the product. High-quality screens must meet the following conditions:

Screen plugging is one of the common faults in the operation of the vibrating screen. The screen plugging is formed by various factors, including the shape of the stone, the number of critical particles in the mesh, the thickness of the mesh wire, and the mesh The shape is one of the factors.

1. The shape of the stone

In the crushed stone production line, the content of needle-like stone material should be as low as possible to prevent the clogging of the screen. Generally, the stone yard adopts secondary crushing. The front row uses the jaw crusher. Its crushing principle is extrusion crushing, which is easy to produce flaky stones. The second time uses the impact crusher. Its crushing principle is impact crushing. If the size of the stone crushed by the front row sub-jaw crusher is too small, more flakes will be produced. In order to reduce the ratio of needle flakes, the front row crushing size should not be too small.

2. The combination of screen mesh and wire diameter

Practice has proved that the same mesh, too thick steel wire will cause a significant increase in the probability of plugging.

3. The shape of the mesh

The square mesh is generally used for the screen, and the anti-blocking mesh is used for the small mesh. If the plugging is serious, the rectangular hole can also be used without affecting the particle size of the stone. However, from the perspective of service cycle, attention should be paid to the mesh direction, otherwise it will affect the service cycle of the screen.

4. Reasonably adjust the screen tension

Reasonable adjustment of the screen tension is an effective method to reduce the screen plugging. The reasonable tension makes the screen and the supporting beam produce a slight secondary vibration, thereby effectively reducing the occurrence of hole plugging. The specific method is, Make the tension hook into a constant force tension mechanism, that is, add a spring to the tension bolt.

In addition to plugging holes in the screen, during the operation of the vibrating screen, the screen will also have other failures. The common types are as follows:

1. The screen steel wire breaks linearly at the pressure plate

Cause Of Issue:

The tension bolt is loose; the screen is too long; part of the support beam is de-welded or deformed; the tension plate is worn; one tension plate is installed with two screens, etc.

Elimination Method:

Tighten the bolts; re-determine the length of the screen; weld the support beam at all positions; change the tension plate; the length of the screen is matched with the tension plate, etc.

2. Low penetration rate

Cause Of Issue:

The mesh opening rate is low.

Elimination Method:

Reselect the wire mesh of the screen, etc.

3. Serious plugging

Cause Of Issue:

The content of needle flake stone particles is too large; the screen wire is too thick; the critical particles of stone material and mesh are more.

Elimination Method:

Change the stone crushing method; reasonable match of mesh wire; change the mesh form, etc.

4. Straighten the edge and deform the angle

Cause Of Issue:

If the angle (or strength) of the tensioning hook is not enough, the tensioning hook will be deformed; the tensioning position is not in place and the focus point is not accurate.

Remedy:

Change the tensioning hook again; pay attention to the correct installation, requiring the tensioning hook to be at the bottom of the screen hook, etc.

5. Serious wear in the middle of the screen

Cause Of Issue:

Poor material flow or sink in the middle of the screen, etc.

Remedy:

Improve the diversion capacity or the middle height of the screen into an upward arc, etc.

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