A variable flow drilling and punching integrated nozzle

Abstract

The invention discloses an integrated flow-variable drilling and punching nozzle which is mounted on a drilling bit and comprises a nozzle body (7). An inner hexagonal nozzle water outlet is formed in the front part of the nozzle body; an outer thread (8) is formed in the external part of the nozzle body; a nozzle radial water inlet (9) is formed in the middle of the nozzle body; an inner clamp spring clamping groove is formed in the rear part of the nozzle body; a cylindrical inner clamp spring (11) is clamped in the inner clamp spring clamping groove; a water jet piston is positioned in a cylindrical inner cavity of the nozzle body and is tightly matched with the cylindrical inner cavity; a hollow nozzle water jet passageway (10) is arranged in the water jet piston; a spiral spring sleeves the thin part at the front end of the water jet piston and is mounted in the cylindrical inner cavity of the nozzle body. The integrated flow-variable drilling and punching nozzle can realize layer-penetration drilling construction and hydraulic power punching, adopted the integrated drilling bit, can meet the demands of cooling the drilling bit and discharging slag during low hydraulic pressure drilling construction, forms high pressure water jet for punching during punching through high-hydraulic-pressure hydraulic power, simplifies the hydraulic power punching technology, and improves the construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of coal mine underground mining, in particular to the technical fields of coal mine gas control, gas drainage drilling construction, drilling hydraulic punching and hydraulic slotting. Background technique [0002] Gas disaster is one of the most important disasters in high gas mines and gas outburst mines, and it is also one of the main bottlenecks restricting coal mine production. With the increase of mining depth, the gas content and gas pressure gradually increase, and the engineering volume and cost required to solve the gas problem are also increasing. Especially for a single low-permeability coal seam, the efficiency of gas drainage is low, and a large number of drilling Appropriate anti-reflection measures need to be taken to speed up the progress of gas control, achieve a balance between pumping, digging and mining, and ensure mine output. For a single low-permeability and high-gas coal seam, the h...

AI Technical Summary

Problems solved by technology

Most of the currently used hydraulic punching technology is to use ordinary drilling tools to drill holes first, and then return the drill to replace the hydraulic punching drilling tools for punching. Disadvantages of weak slag removal ability of hole drilling tools

Some drilling and punching integrated drill bits only have radial nozzles when punching holes, but no front nozzles, which has the disadvantage of incomplete water jet coverage

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