Over thick wood chip crusher

Abstract

The invention discloses an over thick wood chip crusher provided with a machine shell and rotative compression rollers. The over thick wood chip crusher is characterized in that the machine shell is in a fixed box type structure and can be divided into an upper part and a lower part which can be detachable; two ends of the machine shell are provided with short supporting shafts; the machine shell is internally provided with an upper compression roller and a lower compression roller which do opposite retative motion; grooves and convex teeth regularly spread over the surface of each compression roller; the compression rollers are parallel mutually, arranged on the short supporting shafts through a rocker bearing block, and combined into two movable compression rollers which can relatively swing within a certain range; and a hydraulic cylinder is arranged between the two compression rollers. The invention has the advantages of no blockage, low crushed damage rate and favorable recrushing effect.

Description

technical field [0001] The invention relates to an over-thick wood chip processing device, which belongs to special equipment for stock preparation in pulping and papermaking. Background technique [0002] At present, domestic wood pulp mills generally use traditional wood chip re-shredders, small chippers, or the method of reflowing coarse wood chips into the chipper for re-cutting coarse and over-thick wood chips. The role of the old-fashioned re-chips is to Coarse wood chips are subjected to strong impact, so that the thick chips are crushed into sawdust. As a result of the treatment, more than 60% of the wood fibers are damaged, and the valuable wood resources cannot be effectively utilized. Sending the thick slices to the chipper for re-cutting cannot achieve the expected effect, because the wood blocks are light and unstressed, and it is impossible to be re-cut by the flying knife, but can only be crushed under the strong impact of the cutter head and the base , its f...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic wood pulp mills generally use traditional wood chip re-shredders, small chippers, or the method of reflowing coarse wood chips into the chipper for re-cutting coarse and over-thick wood chips. The role of the old-fashioned re-chips is to Coarse wood chips are subjected to strong impact, so that the thick chips are crushed into sawdust. As a result of the treatment, more than 60% of the wood fibers are damaged, and the precious wood resources cannot be effectively utilized.

Sending the thick slices to the chipper for re-cutting cannot achieve the expected effect, because the wood blocks are light and unstressed, and it is impossible to be re-cut by the flying knife, but can only be crushed under the strong impact of the cutter head and the base , its function is similar to that of a re-shredder hitting wood blocks, and the breakage rate is also very high

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