Secondary vibration screening method for screen surface and large-scale vibrating screen

Abstract

The invention discloses a secondary vibration screening method for a screen surface, belongs to the field of vibration screening machines, and solves the problem that holes of the screen surface of a large-scale vibrating screen is easy to plug. In the screening method, a screening operation which can clear screen holes is performed on materials on the screen surface under the action that a screen frame vibrates according to designed work frequency and vibration amplitude and under the action of secondary vibration of the screen surface. The screen frame of the large-scale vibration screen is mainly formed by assembling two side plates, a plurality of lower beams and 2 to 4 upper beams; the screen surface is formed by arranging a plurality of screen plates; each screen plate is arranged on a support base on each lower beam of the screen frame; a side protecting plate is respectively arranged inside the side plate of the screen frame; a gap is reserved between each side protecting plate and each screen plate; a gap is reserved between each two adjacent screen plates of the screen surface; and a non-metal elastic material strip is respectively embedded between the side protecting plate and the screen plate as well as between the screen plates. The method has the characteristics of high screening performance, high screening efficiency and long service life, and can be used for screening operations of various materials and wet materials which are different to screen.

Description

Technical field: [0001] The invention belongs to the field of vibrating screening machinery, and mainly relates to the instantaneous unbalanced force generated by materials under the designed working frequency vibration and the secondary vibration of the sieve plate, so as to realize the secondary vibration screening of the screen surface for screening without blocking holes method and a large vibrating sieve. Background technique: [0002] During the operation of the vibrating screen, the phenomenon of clogging the screen holes often occurs, because during the screening operation of the vibrating screen, materials close to the mesh size are always blocked in the mesh holes, which is not easy to clean; In the process, it is also very easy to block the mesh. Since the vibrating screen is screened in a state of regular motion trajectory, it is difficult for the blocked material to change its position, and the more blocked it becomes, the more serious it becomes. In addition,...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a secondary vibration screening method for the screen surface and a large-scale vibrating screen. This method causes the sieve plate forming the screen surface to generate secondary vibration, solves the problem of material plugging, increases the screen penetration rate, and at the same time It also slows down the impact of the material on the screen surface and improves the service life of the screen plate

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