Impact-prevention pressure relief drill rod self-rotation joint

Abstract

The invention discloses an impact-prevention pressure relief drill rod self-rotation joint. The impact-prevention pressure relief drill rod self-rotation joint comprises a lower joint pipe, a casing pipe, a center pipe, a pressing cover, a check ring and an upper joint, the center pipe is embedded in the casing pipe, a boss structure is arranged on the center pipe, deep groove ball bearings are arranged on the upper end and the lower end of the boss structure, the check ring is located below the deep groove ball bearing on the lower portion of the boss structure, the pressing cover is fixed below the check ring, the upper end of the lower joint pipe is in threaded connection with the lower end of the casing pipe, the lower end of the upper joint is in threaded connection with the upper endof the center pipe, the two sides of the upper joint are symmetrically provided with a first-stage nozzle and a second-stage nozzle, water spraying holes are formed in the first-stage nozzle and thesecond-stage nozzle, and the water spraying hole in the left side and the water spraying hole in the right side are opposite in direction. Compared with the prior art, the self-rotation joint has thebeneficial effects that the structure is reliable, water pressure impact in the joint can be adjusted while self-rotation is achieved, and in addition, through self structural design, the joint innerpipeline self locking is achieved after water injection is stopped.

Description

technical field [0001] The invention relates to a water injection joint when a mine drilling rig performs wet drilling, in particular to a self-rotating joint of an anti-scouring pressure relief drill pipe. Background technique [0002] With the continuous development of science and technology, the demand for coal in the production of many enterprises is also increasing, so the coal industry is also developing at a high speed. Although coal mine production is becoming more and more mechanized, a large amount of coal dust will still be generated during coal mining operations. And gas, gas has hidden dangers of explosion, which seriously restricts the safe production of coal mines. Coal dust endangers the health of mining workers, and the incidence of pneumoconiosis among coal miners is also increasing. source. In recent years, for the sake of the physical and mental health and life safety of coal miners, the coal industry has carried out a lot of exploration in the control o...

AI Technical Summary

Problems solved by technology

[0003] In the water injection joints of the existing mining drilling rigs for wet drilling, when the water injection is stopped, the water injection backflow or other factors may cause external impurities to enter the joints, causing the joints to be blocked. At the same time, the structure of the joints is mostly fixed. structure, its spray area and range are limited, it cannot realize the self-rotation function and cannot control the water pressure in the water injection joint

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