Screening net adjusting and anti-blocking device

Abstract

A screening net adjusting and anti-blocking device comprises a feeding device, a breaking device, a supporting device, a screening device and an anti-blocking and adjusting device. Adjusting columns are arranged below screening columns, screening holes in the screening columns can be blocked when the adjusting columns ascend, and therefore the opening and closing number of the multiple screening holes can be adjusted in the screening process at any time. Due to the fact that the radii of the screening holes formed in the screening columns from top to bottom are gradually increased, the particle size of screened materials can be adjusted. The positions of the adjusting columns are decided by the particle size of the materials which need to be screened, the adjusting columns ascend to pass through leaking holes to arrive at the position above a screening plate and can push out the large-particle-size materials which block the screening holes, and therefore the large-particle-size materials are prevented from blocking the leaking holes. The purposes of adjusting the size of the screening holes and preventing the leaking holes from being blocked are achieved by the same device, the structure is simple, and operation is convenient.

Description

technical field [0001] The invention relates to the technical field of screens, in particular to an adjustment and anti-blocking device for screens. Background technique [0002] Sieves can be divided into flat sieves, drum sieves, conical sieves, etc. in terms of shape; they can be divided into hand sieves, vibrating sieves, and rotary sieves in terms of driving mode and screening method; Single-layer sieve and multi-layer sieve; in the sieving process, all types of sieves will encounter the problem of screen blockage, that is, after screening to a certain extent, large particles will block the sieve holes, resulting in small particles that cannot Through the sieve hole, the method of preventing the sieve hole from being blocked in the prior art is mostly to set a rotatable brush above the sieve or to set a brush outside the sieve to clean the inside of the sieve during the rotation of the sieve; However, setting the rotating brush above the screen can only clean the scree...

AI Technical Summary

Problems solved by technology

[0002] Sieves can be divided into flat sieves, drum sieves, conical sieves, etc. in terms of shape; they can be divided into hand sieves, vibrating sieves, and rotary sieves in terms of driving mode and screening method; Single-layer sieve and multi-layer sieve; in the sieving process, all types of sieves will encounter the problem of screen blockage, that is, after screening to a certain extent, large particles will block the sieve holes, resulting in small particles that cannot Through the sieve hole, the method of preventing the sieve hole from being blocked in the prior art is mostly to set a rotatable brush above the sieve or to set a brush outside the sieve to clean the inside of the sieve during the rotation of the sieve; However, setting the rotating brush above the screen can only clean the screen surface when the screen stops vibrating and sieving. Setting the brush outside the screen is mostly used for drum screen cleaning, that is, the circular rotation of the drum can make the brush clean the inside of the screen. However, it is not easy to clean the plate screen with an external brush, and the external brush cannot penetrate into the inside of the screen when cleaning the inside of the screen, and the cleaning is not thorough enough.

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