Irregular mixed material screening device

Abstract

The invention discloses an irregular mixed material screening device. The irregular mixed material screening device comprises a frame, a vibration motor, and a vibration screen arranged on the frame;the vibration screen comprises a screening net plate; the screening net plate comprises a substrate; the substrate is provided with multiple discharge holes; the screening net plate further comprisesmultiple grooves downwards recessed from a plane of the substrate, and multiple convex parts projected on the plane of the substrate; the back end parts of the grooves communicate with the discharge holes; and the depths of the grooves are gradually reduced from back to front. The irregular mixed material screening device has the advantages of good screening effect, tidy materials, difficult blockage of screening holes, no deformation of the screening net plate, and efficient and reliable overall equipment operation.

Description

technical field [0001] The invention relates to a material separation device, in particular to a vibration screening device for irregular mixed materials such as stems, tea leaves and traditional Chinese medicines. Background technique [0002] When using vibrating equipment and screens to screen materials of different shapes and volumes, the traditional technology is to generally use rocker-type vibrating screens and shrapnel-type vibrating screens, but the transmission mechanisms of both are motor-driven eccentric assemblies. The structure of the assembly is complex, the noise is large, and the frequency and amplitude of vibration are limited, which is not conducive to screening. At this stage, there is a kind of exciting vibration equipment, which has the characteristics of high frequency, small amplitude and low noise. It will become the mainstream trend in the field of screening. . No matter which kind of vibrating equipment is used in the screening process, the screen...

AI Technical Summary

Problems solved by technology

[0002] When using vibrating equipment and screens to screen materials of different shapes and volumes, the traditional technology is to generally use rocker-type vibrating screens and shrapnel-type vibrating screens, but the transmission mechanisms of both are motor-driven eccentric assemblies. The structure of the assembly is complex, the noise is large, and the frequency and amplitude of vibration are limited, which is not conducive to screening. At this stage, there is a kind of exciting vibration equipment, which has the characteristics of high frequency, small amplitude and low noise. It will become the mainstream trend in the field of screening.

No matter which kind of vibrating equipment is used in the screening process, the screening screen is very important, which is directly related to the quality and efficiency of the screening. The current screening screens are roughly divided into two types, one is The punching screen, the processing technology of the punching screen is similar to the screen described in this patent, and its shape is all standard round holes, square holes, plum blossom holes, and cross holes, which cannot meet the complex shape of the screening material. When separating irregularly mixed materials, due to the entanglement between the materials, they often form agglomerates and block the surface of the screen, which not only reduces the efficiency but also consumes a lot of manual cleaning on-line. The other is the woven mesh, which is passed through the horizontal It is interlaced with the longitudinal wires, and the screening area is increased when the area of ​​the punching screen is the same, but the problem of clogging still exists. The biggest problem is that the strength of the woven mesh is not high, and it is easy to use on vibrating equipment. Loose and deformed, in short, neither of the two screens has substantially improved

[0003] The Chinese utility model patent with the notification number CN204861131U discloses an anti-clogging vibrating sieve plate for tobacco screening, which solves the problem that the traditional straight-through mesh is easy to block and requires manual cleaning, but because the mesh is a rectangular structure, the mesh The length-to-width ratio of the hole is relatively large, which causes the distance between the shredded tobacco on the fin plate to the right angle of the mesh is greater than the distance to the edge of the mesh, that is, the length of the shredded tobacco that falls from the fin plate is uneven, although it can prevent The effect of blocking the mesh, but for the environment that requires higher uniformity of shredded tobacco, the shredded tobacco that it sorts cannot meet the requirements. The Chinese utility model patent with the notification number CN205378841U discloses a vibrating sieve plate for tobacco. The patent fixes the shape and size of the mesh on the basis of CN204861131U, and the shredded tobacco will not slip from the edge of the fin plate. Theoretically, the length of the shredded tobacco falling through the mesh is the same, so when faced with complex shredded tobacco shapes, such as winding Irregular mixed shredded tobacco will not get the best screening effect, and the shredded tobacco that needs to be sieved is not high in purity. The notification number is CN 104070008, which discloses a spiral spring vibration screening equipment. The screen mesh woven by the edge of the spiral spring groove, the wire diameter of the woven screen mesh is generally relatively thin, and it is easy to produce serious deformation when used on vibrating equipment for a long time, resulting in the phenomenon of material deviation and blocking.

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