Multifunctional scour-preventing jet flow drilling and joint-cutting spray head for coal bed

Abstract

The invention belongs to a high-pressure water jet flow equipment unit and particularly relates to a multifunctional scour-preventing jet flow drilling and joint-cutting spray head for a coal bed, comprising a drilling rod (13), a drill bit connecting body (12), an outer sleeve (1) and a water flowing hole (1-1); the center of the drill bit connecting body (12) is in threaded connection with a low-pressure water outlet control valve body (11); a water outlet (10) is arranged at the center of the low-pressure water outlet control valve body (11) and communicated with the water flowing hole (1-1) at the center of the outer sleeve (1); a step is arranged in the water outlet (10); a low-pressure water outlet control spring (9) is arranged at the inner end of the step; the left end of the spring (9) is connected with a sliding block (8); two high-pressure control valve bodies (6) are in threaded connection in the symmetrical positions of the circumferential wall of the outer sleeve (1); and conical spray nozzles (5) are arranged in the high-pressure control valve bodies (6). The multifunctional scour-preventing jet flow drilling and joint-cutting spray head for the coal bed has the advantages of simple structure, easy manufacture, low cost and improvement on the production of a coal mine.

Description

technical field [0001] The invention belongs to a high-pressure water jet equipment component used in coal mines for coal seam drilling and slit pressure relief to prevent coal mine rock burst disasters, and in particular relates to a multifunctional coal seam anti-shock jet drilling slit nozzle. Background technique [0002] The structures of high-pressure water jet drilling and slitting nozzles used in engineering are mainly divided into the following categories: The first type is forced rotation and self-rotation nozzles. The forced rotation nozzles are large in size and complex in structure. The self-rotating nozzle has a complex structure and requires a speed limiting device. This type of nozzle is mainly used in projects such as ship rust removal and seam cutting; the second type is the internal rotary nozzle, which requires high jet pressure and is difficult to achieve with general equipment. This type of nozzle is mainly used in building cleaning and pipeline cleanin...

AI Technical Summary

Problems solved by technology

[0002] The structures of high-pressure water jet drilling and slitting nozzles used in engineering are mainly divided into the following categories: The first type is forced rotation and self-rotation nozzles. The forced rotation nozzles are large in size and complex in structure.

Self-rotating nozzle, complex structure, and speed limiting device

This type of nozzle is mainly used in projects such as ship rust removal and seam cutting; the second type is the internal rotary nozzle, which requires high pressure for the jet flow, which is difficult to achieve with general equipment. This type of nozzle is mainly used in building cleaning and pipeline cleaning projects. The third type is multi-nozzle fixed nozzles with irregular holes. This type of nozzles is mainly used in oil field drilling and auxiliary excavation projects. In general: the existing nozzles have complex structures and single functions, and are mainly used in petroleum engineering. , pipeline cleaning, ship derusting and other projects, it is not suitable for mining projects

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