Five-bit spiral-drill coal mining device convenient for switching drilling rods

Abstract

The invention discloses a five-bit spiral-drill coal mining device convenient for switching drilling rods. The five-bit spiral-drill coal mining device comprises a supporting frame, a moving frame, a guiding rail, a hydraulic propelling oil cylinder, a hydraulic braking motor, a torque and rotating-speed sensor, a transmission box, the drilling rods, spiral bits, a tightening device, a lifting hydraulic cylinder, an auxiliary hydraulic oil cylinder, a drilling-rod supporting frame, a drilling-rod lifting frame and a drilling-rod bottom supporting frame and the like, wherein the hydraulic braking motor supplies power to the spiral bits and drives the spiral bits to rotate so as to realize cutting of a coal seam. A bit-feeding mechanism transfers the drilling rods to be switched to the switching position, and the automatic switching of the drilling rods is finished by cooperative work of the lifting hydraulic cylinder, the auxiliary hydraulic cylinder, the tightening device and the hydraulic propelling oil cylinder. The five-bit spiral-drill coal mining device disclosed by the invention has the advantages that hydraulic driving is adopted, the structure is simple and compact and the installation and the disassembly are convenient; compared with the prior art, the five-bit spiral-drill coal mining device disclosed by the invention has the beneficial effects that the needed time for switching the drilling rods is greatly reduced, the labor and the materials are saved, the efficiency for switching the drilling rods is improved, and support is provided for safe and high-efficiency mining of underground thin and ultrathin coal seams.

Description

technical field [0001] The invention relates to mining machinery and equipment, in particular to a five-drill auger coal mining device which facilitates the exchange of drill rods. Background technique [0002] my country is the largest coal producer and consumer in the world. With the economic growth, the demand for coal is increasing. 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, but the mining volume only accounts for about 8% of the total output, which is far lower than the proportion of its reserves. All coal mining enterprises are facing the problem of mining thin and extremely thin coal seams, especially the reserves of medium-thick coal seams are decreasing day by day. The development of mining technology for thin and extremely thin coal seams is extremely important, and its mining has become a global problem that needs to be solved urgently. [0003] The ...

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Problems solved by technology

[0003] The mining of thin and extremely thin coal seams in my country has successively experienced blast mining, coal cutter-blast mining combined mining, ordinary mechanized coal mining and comprehensive mechanized coal mining, but it is difficult to mine ultra-thin coal seams with a thickness of less than 0.8m , resulting in a huge waste of coal resources

[0004] Since thin and extremely thin coal seams are difficult to mine, my country introduced a three-bit shearer from Ukraine at the end of the last century. Compared with plows and drum shearers, it has significant advantages in mining thin and extremely thin coal seams: The ultra-thin coal seam has been effectively ...

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