Screening device used after coal mining

Abstract

The invention discloses a screening device used after coal mining. The screening device comprises an inlet support, an outlet support, a conveying belt, a control cabinet, an alarm lamp, a motor, a left groove, a supporting mat, a distance inductor, a right groove, a strut, a stretchable rod, a connecting rod, a spring and photoelectric inductors. The screening device has the beneficial effects that the left groove and the right groove are formed in the side walls of the two sides of the inlet support and the outlet support, three sets of photoelectric inductors arranged at the upper portions,the middle portions and the lower portions are arranged inside the left groove and the right groove correspondingly, the three sets of photoelectric inductors on the left groove and the right grooveare correspondingly placed at different horizontal heights one by one, and therefore when the device is used, the number of coal mine passing through the screening device can be monitored and detected, the height and size of each coal mine can be judged, the condition that the coal mine with the small size and at the low height is not counted can be avoided, the inlet support and the outlet support run at the same time, the transferred coal mine is subject to comparison and detection two times, and the data accuracy is guaranteed.

Description

technical field [0001] The invention relates to a sieving device, in particular to a sieving device used for coal mine mining, and belongs to the field of coal mine machinery. Background technique [0002] Coal mines generally need to be screened after the mining is completed, and the screening process includes distinguishing between large and small coal mines, so as to facilitate sorting and screening. Therefore, screening requires the use of screening devices. The screening device realizes automatic statistical data, greatly saving manpower and material resources, and improving production and processing progress. [0003] However, the existing screening devices used for coal mine mining still have certain defects in use. Because the volume of the coal mines is generally uneven, there are large and small, so when the number of coal mines is counted, there will often be large volumes, Higher coal mines cannot pass through the import rack, and some smaller coal mines are eas...

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Problems solved by technology

[0003] However, the existing screening devices used for coal mine mining still have certain defects in use. Because the volume of the coal mines is generally uneven, there are large and small, so when the number of c

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