Fine multi-stage automatic cyclic crushing device and working process thereof

Abstract

The invention discloses a fine multi-stage automatic cyclic crushing device. The fine multi-stage automatic cyclic crushing device comprises a crushing box body, wherein the crushing box body is fixedto a supporting rack, a first transmission gear is mounted at the bottom end of the left side wall of the crushing box body, a second transmission gear engaged to the first transmission gear is mounted on the side wall of the crushing box body; meanwhile, two first power gears engaged to the two transmission gears are fixed to the top of the crushing box body, and two primary crushing roller engaged to each other are fixedly mounted on the two first power gears. As the two crushing rollers are arranged to act at the same time, a material is fined and crushed, and meanwhile, an arc-shaped screen is arranged at the lower end of the device for screening the sieved material. Meanwhile, a cyclic scraping mechanism is arranged to scrape large particle material in the arc-shaped screen to the secondary crushing roller to be crushed again, so as to be automatically cyclically crushed, and therefore, the work efficiency is improved, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the field of road and bridge construction, and relates to a refined multi-stage automatic circulation crushing device and its working process. Background technique [0002] In the process of road and bridge construction, raw materials such as sand and gravel are needed to prepare concrete. The particle sizes of sand and gravel in concrete used for road bridges in different regions and for different purposes are not the same. In the existing sand and gravel crushing process, usually It is to crush the sand directly through the pulverizer in one step, and then sieve it through the sieving device, and then crush the large-grained sand after the sieving, which needs to be crushed many times, and additional sieving is required during the crushing process. Screening by the device not only reduces work efficiency, but also increases the cost of powder screening. Contents of the invention [0003] The object of the present invention...

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Problems solved by technology

[0002] In the process of road and bridge construction, raw materials such as sand and gravel are needed to prepare concrete. The particle sizes of sand and gravel in concrete used for road bridges in different regions and for different purposes are not the same. In the existing sand and gravel crushing process, usually It is to crush the sand directly through the pulverizer in one step, and then sieve it through the sieving device, and then crush the large-grained sand after the sieving, which needs to be crushed many times, and additional sieving is required during the crushing process. Equipment for screening, not only reduces work efficiency, but also increases the cost of powder screening

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