Spiral drill rod of coal mining machine

Abstract

The invention discloses a spiral drill rod of a coal mining machine. The spiral drill rod comprises a drill rod cylinder assembly and a drill rod blade fixed to the periphery of the drill rod cylinderassembly, the drill rod cylinder assembly comprises a drill rod cylinder, unlocking devices are arranged at the end, opposite to a mounting guiding connection shaft, of the drill rod cylinder and located on the inner side of a drill rod stabilizer assembly at the end, opposite to the mounting guiding connection shaft, of the drill rod cylinder, and the pair of unlocking devices are symmetricallydistributed in the radial direction of the drill rod cylinder; and each unlocking device comprises an unlocking column, an upper ring, an unlocking spring and a lower ring, the upper ends of the unlocking columns make contact with the upper rings, the upper rings are embedded in the drill rod cylinder, the unlocking columns penetrate through the unlocking springs, the upper ends of the unlocking springs are connected with the unlocking columns, the lower ends of the unlocking springs are connected with the lower rings, the lower ends of the unlocking columns penetrate through the lower rings,and the lower rings are embedded in the drill rod cylinder. The spiral drill rod is high in bearing capacity, easy to manufacture and convenient to demount and mount.

Description

technical field [0001] The invention relates to a drill rod, in particular to an auger drill rod for a coal shearer. Background technique [0002] In many coal fields in southern my country, there are mostly thin and extremely thin coal seams. However, due to the difficulty of mining thin coal seams and the immature mining technology, the mining of thin and extremely thin coal seams has been sluggish. Coal mining with drill shearer is a more effective method for mining extremely thin coal seams. [0003] However, from the perspective of the use of the existing drilling shearer, there are disadvantages such as difficult connection of drill pipes, long time consumption, low overall rigidity and unstable connection. Contents of the invention [0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an auger drill pipe for a coal shearer, which has a high bearing capacity, low requirements on the coaxiality of the front an...

AI Technical Summary

Problems solved by technology

[0003] However, judging from the use of existing drilling shearers, there are disadvantages such as difficult connection of drill pipes, long time consumption, low overall rigidity and unstable connection.

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