Four-drill auger miner

Abstract

The invention discloses a four-drill auger miner particularly suitable for mining an ultrathin coal seam and a protective coal seam with the minimum thickness of 0.45 meter and the inclination of 0 to 25 degrees. The four-drill auger miner mainly comprises an explosion-proof motor, a hydraulic coupler, a fine-adjustment hydraulic cylinder, an air duct, a speed reducer, a fine-adjustment device, a frame, a fixing box, drills and a drill pipe, wherein the explosion-proof motor is connected with the speed reducer by the hydraulic coupler; the output shaft of the speed reducer is connected with the drill pipe which is connected with the transmission shaft of the fixing box; the fixing box is provided with four drills which have opposite rotation directions, symmetrically; and the four drills are divided into right rotating drills and left rotating drills which are arranged in pairs, and are driven to move through gear meshing so as to complete cutting. The cutting efficiency and coal capacity of the four-drill auger miner are improved greatly; and the anger miner has balanced stress and stable running in use, and the drills are convenient to maintain after being worn drills. Therefore, the working stability of the complete machine is improved. The four-drill auger miner has the advantages of compact and reasonable structure, high interchangeability and easy maintenance.

Description

technical field [0001] The invention relates to a four-bit drilling coal mining machine, which is especially suitable for the mining of extremely thin coal seams with a minimum thickness of 0.45m and an inclination angle of 0-25° and liberated seams. Background technique [0002] my country's thin and extremely thin coal seams are widely distributed and have large reserves. The proven reserves account for as much as 20% of the total coal reserves, while the output only accounts for about 8% of the total output, which is far lower than the proportion of the reserves. All major mining bureaus across the country are facing the problem of thin and extremely thick coal seam mining, especially as the reserves of thick and medium-thick coal seams in old mining areas are increasingly depleted, the problem of thin and extremely thin coal seam mining is more prominent. Taking a comprehensive view of the current situation of coal mining in the country, the mining of thin and extremely ...

AI Technical Summary

Problems solved by technology

However, the three-bit drilling shearer has the disadvantages of low cutting efficiency, poor coal loading effect, and time-consuming connection of drill pipes; moreover, the middle drill bit diameter of the three-bit drilling shearer is small, the coal delivery effect is poor and coal blocking , the three drill bits are different, poor interchangeability, inconvenient maintenance

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