Mining drilling and cutting integrated drill bit

Abstract

The invention discloses a mining drilling and cutting integrated drill bit which comprises a main shaft. An annular gland is arranged at the front end of the main shaft, the rear end of the main shaft is used for being connected with a high-pressure drill pipe, and a spray nozzle is arranged on the main shaft. An elastic piece is arranged in the inner cavity of the main shaft, a sealing element is fixedly arranged at the front end of the elastic piece, the sealing element seals the central cavity of the annular gland when the elastic piece stretches, a clearance is reserved between the sealing element and the main shaft, a connecting piece is fixedly arranged at the front end of the sealing element, a clearance is reserved between the connecting piece and the gland, and a drill bit body is fixedly arranged on the front section of the connecting piece. A tubular protecting piece is coaxially arranged on the rear section of the drill bit body, the tubular protecting piece is located outside the gland and the main shaft, and the length of the tubular protecting piece meets the following condition that the rear end of the tubular protecting piece is located in front of the water orifice of the spray nozzle when the sealing element seals the central cavity of the annular gland. The mining drilling and cutting integrated drill bit is novel in structure and achieves the integration of drilling and cutting, the switching of drilling and cutting is simple and reliable, abrasive materials are not added, and pure water cutting is carried out.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment for coal mines, and in particular relates to a mine drilling and cutting integrated drill bit. Background technique [0002] The research on high-pressure water jet anti-outburst technology began in the 1980s. At present, foreign high-pressure water jet anti-outburst technology has been very mature and widely used in road cleaning, industrial rust removal, ammunition rust removal, oil well corrosion protection, metal and Non-metal sheet cutting, jet grouting, broken pavement, broken soybean protein isolate, coal mine gas drainage, etc., especially in Australia, the application of high-pressure water-assisted drilling and kerf anti-reflection technology in ground and underground drilling has been very mature. The world takes the lead. [0003] Domestic high-pressure water jet anti-outburst anti-reflection technology research began in the 1990s. There were researches on abrasive high-p...

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Problems solved by technology

[0003] Domestic high-pressure water jet anti-outburst anti-reflection technology research began in the 1990s. There were researches on abrasive high-pressure water jet anti-outburst equipment and technology. Due to the addition of abrasives, the process is complicated, and it is suitable for shallow outburst anti-outburst gas drainage drilling; and Using high-pressure water jet equipment for rotary cutting of drilling rigs and water delivery of drill pipes, the joints of drill pipes are prone to leakage, and the problem of maintaining pressure needs to be solved; and high-pressure water jet anti-outburst equipment cannot realize the integration of drilling and cutting, and there is a problem of easy blockage of waterways

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