Spiral drill rod type hole packer

Abstract

The invention relates to a spiral drill rod type hole packer, which belongs to the technical field of coal mine drilling, and comprises a filter pipe, at least one spiral feeding pipe, a spiral hole sealing pipe and a propelling pipe which are arranged in sequence, and the rear ends of the filter pipe, the spiral feeding pipe, the spiral hole sealing pipe and the propelling pipe can be detachably connected with a driving drill rod of a drilling machine; spiral grooves are formed in the circumferential directions of the spiral feeding pipe and the spiral hole sealing pipe to form a hole sealing agent conveying channel; plugging rings with exhaust holes are circumferentially arranged at the rear ends of the filter pipe and the spiral hole sealing pipe so as to realize plugging and exhaust of the hole sealing agent; the filter pipe, the spiral feeding pipe and the spiral hole sealing pipe are all provided with center holes and are communicated with one another to form a gas channel, the filter pipe is provided with a plurality of vent holes communicated with the center holes of the filter pipe to allow gas to pass through, and the rear end of the spiral hole sealing pipe is provided with a one-way valve to control on-off of the gas channel; the pushing pipe is used for pushing the spiral hole sealing pipe into the gas extraction hole. Compatibility of a hole packer and a drill rod structure is achieved, mechanical hole sealing can be achieved through a drilling mechanism, and resistance of hole sealing grouting can be reduced.

Description

technical field [0001] The invention belongs to the technical field of coal mine drilling, and relates to an auger rod type hole sealer. Background technique [0002] The gas sealer for coal mine mainly uses two plugs and one injection to form an annular airtight air space, and injects plugging materials into the airtight space from the outside, and the plugging materials solidify and fill the airtight space. The space for injecting the plugging material is formed by the gap between the gas drainage hole and the drainage pipe. Therefore, the larger the drainage pipe, the smaller the closed space, the smaller the grouting channel, and the greater the difficulty of grouting. The smaller the extraction pipe, the larger the grouting space, but the poorer the stability of the plugging material and the lower the strength, the more difficult the feeding of the plugging pipe will be, which will lead to the short length of the plugging pipe and the sealing effect. worse. [0003] T...

AI Technical Summary

Problems solved by technology

The smaller the extraction pipe, the larger the grouting space, but the worse the stability of the plugging material, the lower the strength, and the difficulty in feeding the sealing pipe will become greater, resulting in the length of the sealing pipe being too short, resulting in the sealing effect become worse

[0003] The main disadvantages of the existing sealing technology are: (1) slot-type grouting, the grouting pressure is high, and the resistance of the annular grouting channel is large; (2) the connection method of the hole sealing device cannot adapt to the drilling mechanism, and the two are independent two Set of devices, unable to achieve mechanized or automated hole sealing

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