Novel compound impact type gravel crusher

Abstract

The invention discloses a novel compound impact type gravel crusher, which is suitable for crushing of concrete aggregate resource machine-made sand. The gravel crusher mainly comprises a crushing cavity and an impeller, wherein the inner edges of counterattack plates (8) in a crushing cavity body (1) of the crushing cavity are tooth-shaped; the multiple counterattack plates (8) are fixed in the crushing cavity body (1) through counterattack plate racks (7) to form a circular tooth-shaped crushing surface; four bluff type section gaps spaced at equal distances are designed on the outer edge surface of an impeller body (2) of the impeller; impact hammers (18) are embedded into the section gaps; the section gaps on the outer edge of the impeller body (2) and the counterattack plates (8) form a crushing area; materials thrown out of material outlets (14) are impacted on the counterattack plates (8) to complete primary crushing; the crushed materials form a material curtain in the crushing area after being bounced, and then are intensively impacted by the impact hammers (18) rotating along with the impeller body (2) to complete secondary crushing; and therefore, compound type dual impact crushing is realized. By the adoption of the design of the two cavity material outlets (14), the material feeding particle size is effectively increased, the crushing ratio is improved, and the yield of machine-made sand is increased.

Description

technical field [0001] The invention belongs to the technical field of crushers for mining machinery, and relates to a novel composite impact sandstone crusher. Background technique [0002] With the continuous mining of natural sand and gravel, the output has been severely reduced, in short supply, and even exhausted in most areas. Therefore, the development of concrete aggregate resources - the production of machine-made sand to replace the use of natural sand and gravel is the most effective way to make up for the shortcoming of natural sand and gravel reduction and ensure market supply and demand. At present, there are many kinds of equipment for machine-made sand production. Among these machine-made sand production equipment, PL vertical impact crusher is the most used in the market because of its structural advantages of sand making and shaping. However, during use, it was found that the PL vertical impact crusher has three deficiencies: 1. The material outlet on the ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention designs and discloses a new composite impact sandstone crusher. Through the latest design of the present invention, the deficiencies in the prior art are overcome and solved: 1. The impact plate is designed so that the impact plate can be moved to the central area by adjusting the impact plate frame, so that the worn impact plate still has the crushing function and does not need to be replaced completely; 2. The material outlet on the impeller body adopts a two-cavity outlet design, Make the width of the material outlet much larger than the design size of the three-cavity outlet, allowing more raw materials with larger particle size to enter the crusher without causing blockage, so as to improve the crushing ratio and optimize the material gradation; 3. The impeller body The composite impact design is adopted, and the outer edge of the impeller is designed to have four cliff-shaped section gaps, and an impact hammer is installed on the section gaps, so that a crushing zone is formed between the section gap of the impeller body and the counterattack plate in the crushing chamber, and the impact is in the After the crushed material on the impact plate rebounds, a material curtain is formed in the above crushing area, so that the material is strongly impacted by the impact hammer rotating with the impeller at high speed and crushed again, so as to improve the crushing yield

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