Large-depth down-the-hole hammer rotating pneumatic device

Abstract

The invention discloses a large-depth down-the-hole hammer rotating pneumatic device, and belongs to building construction machines. The invention discloses a down-the-hole hammer rotation power device, and aims to provide a down-the-hole hammer rotation power device with drilling depth not limited by length of a drill rod. The device comprises a rotating joint fixedly connected with a hoisting disc and a pneumatic rotating device communicated with the rotating joint in a butt joint mode. The lifting disc consists of an air inlet joint (10) and a lifting lug (9) which are fixed on a connecting plate (8). The rotary joint consists of an upper joint (1) communicated with an air inlet joint (10), a middle joint (2) fixedly connected with the upper joint, and a lower joint (3) rotationally butted and communicated with the middle joint. The pneumatic rotating device consists of a gas distribution cover (4), a middle pipe (5), a gas collection cover (6) and a spiral core body. The spiral core body is composed of a flow guide body (12) and a plurality of spiral blades (13) evenly distributed between the flow guide body and the inner wall of the middle pipe. Flexible connection can be achieved between a drilling machine and a drill rod through a steel rope, and the rotary power device is a down-the-hole hammer rotary power device.

Description

technical field [0001] The invention relates to a rotary power device for a down-the-hole hammer, in particular to a pneumatic device for driving the down-the-hole hammer to rotate, belonging to construction machinery. Background technique [0002] The down-the-hole hammer is a drilling tool used to form pile holes in the construction of building foundations. It is usually composed of an impactor and an impact hammer that are slidably connected by splines. The working principle of its hole formation is to use the power head installed on the drilling rig to drive the down-the-hole hammer to rotate through the drill pipe, and push the piston in the impactor through compressed air to force the impact hammer to make up and down reciprocating impact movements to achieve rock crushing; the broken rock The swarf is carried to the ground by the exhaust gas discharged by the DTH hammer, so as to realize hole cleaning and slag discharge. [0003] At present, the power head installed ...

AI Technical Summary

Problems solved by technology

[0004]1) The drilling depth is limited by the length of the drill pipe, which cannot meet the requirements of deep hole drilling;

[0005] 2) If the drill pipe is too long, not only will there be a large swing, the drill pipe will easily rub against the wall of the pile hole, and it will also lead to a decrease in transmission efficiency

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