Screening device for coal mining

Abstract

The invention discloses a screening device for coal mining. The screening device comprises a feeding port, and a conveying pipe is installed at the bottom of the feeding port; the crushing mechanism communicates with the bottom end of the conveying pipe, the crushing mechanism comprises a transversely-arranged crushing cylinder, and a crushing assembly is installed in the crushing cylinder; the screening mechanism communicates with one side of the bottom end of the crushing barrel, the screening mechanism comprises a screening chamber, and a coarse screening net and a fine screening net are sequentially and obliquely arranged in an inner cavity of the screening chamber; the circulating mechanism comprises a circulating chamber, the circulating chamber communicates with the screening chamber and is located above the fine screening net, the other end of the circulating chamber communicates with the bottom of the feeding opening through a feeding barrel, and a spiral conveying belt is rotationally connected into the feeding barrel; the whole device can achieve screening and filtering, unqualified raw materials are circularly crushed again, machining procedures are reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal mines, in particular to a screening device for coal mine development. Background technique [0002] Screening is to use a sieve to make the fine-grained materials smaller than the sieve holes pass through the screen surface, while the coarse-grained materials larger than the sieve holes stay on the screen surface, so as to complete the process of separating coarse and fine materials. It consists of two stages: material stratification and fine-grain penetration screening. Material stratification is the condition for completing separation, and fine-grain penetration screening is the purpose of separation. When the existing coal mine screening equipment is in use, the material is usually transported directly to the screening. Screening is carried out in the equipment, and the larger materials are collected and transported, and then crushed and screened again. The overall process is more, which affects t...

AI Technical Summary

Problems solved by technology

[0002] Screening is to use a sieve to make the fine-grained materials smaller than the sieve holes pass through the sieve surface, while the coarse-grained materials larger than the sieve holes stay on the sieve surface, thereby completing the process of separating coarse and fine materials. This separation process can be regarded as Material stratification and fine-grained screening are composed of two stages. Material stratification is the condition for separation, and fine-grained screening is the purpose of separation. When the existing coal mine screening equipment is used, the material is usually directly transported to the screening Screening is carried out in the equipment. For the transportation of the larger materials that are screened out for collection, they are crushed again and screened again. The overall process is more, which affects the screening efficiency.

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