Selective crusher for underground use

Abstract

The invention relates to a selective crusher for underground use, which comprises a supporting stand, a supporting roller mechanism and a revolving drum body, wherein the supporting roller mechanism is arranged on the supporting stand, and the revolving drum body is horizontally installed on the supporting roller mechanism through a rolling ring which is arranged around the drum body and is matched with a supporting roller in the supporting roller mechanism; the inner cavity of the roller is provided with a pre-screening section, a pushing and screening section, a crushing and screening section and a discharge section sequentially backwards from the feed end, wherein a pre-screening section discharge opening is arranged below the pre-screening section, and a discharge chute is arranged below the crushing and screening section; a center shaft which is coaxial with the roller and is driven by a power source to rotate is installed in the roller, a beater plate is arranged on the shaft body of the center shaft at the section matched with the pre-screening section, a rotor in the shape of an oblique tooth is arranged on the shaft body of the center shaft at the section matched with thecrushing and screening section, and a spiral discharge auger is arranged on the shaft body of the center shaft at the section matched with the discharge section; and a plurality of axially arranged lifting plates and nail plates are installed on the inner wall of the screening drum of the crushing and screening section at intervals.

Description

technical field [0001] The invention relates to an underground selective crusher suitable for separating raw coal and gangue after underground mining. Background technique [0002] In the process of coal mining, gangue, ironware and other debris are inevitably produced. In recent years, with the development of coal mining technology, especially the application of fully mechanized mining, continuous mining and top coal caving technology, a large amount of top coal has been mixed into the coal mining process. The bottom plate and the mixed gangue make the quality of the coal deteriorate, causing huge pressure and harm to the coal washing and processing system, and the lifting capacity of the mine is also greatly consumed and wasted, and because the raw coal is directly lifted into the shaft, the amount of gangue on the ground continues to increase. A large number of "gangue hills" have been formed. It not only occupies a large amount of cultivated land, but also causes seriou...

AI Technical Summary

Problems solved by technology

[0009] But this invention also has some defects: first, the power is introduced from one end, the chain transmission system, the body is subjected to a large torque, the noise is large, and it is difficult to reinforce the large sprocket; secondly, there is no angle between the axis and the horizontal when the body is installed, which is not conducive to The propulsion of gangue or debris, the machine does not have a large axial force, and the components of the solid machine have many failures; third, the discharge device is relatively simple, etc.

[0010] At the same time, this invention lacks the consideration of underground mining, and is not suitable for underground raw coal discharge.

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