Pneumatic submerged orifice impact hammer

Abstract

The invention relates to a pneumatic submerged orifice impact hammer, and belongs to the technical field of rock drilling devices. The hammer is composed of an outer cylinder, a piston, a gas distribution rod, a front joint, a rear joint and a drill bit, the rear joint is mounted at one end of the outer cylinder, the drill bit is mounted on the other end of the outer cylinder, a check valve is fixedly mounted in a reducer hole of the rear joint through an assembling base, the gas distribution rod is mounted on one side of the check valve, the piston is slidingly mounted on the gas distributionrod, when the impact hammer works, in the process of impacting the drill bit to be reset by the piston, the end face of the rear joint can limit the axial motion of the piston, the breaking problem,prone to happening in the piston tail and caused by reset impact, of an existing impact device can be avoided, meanwhile, gas in a rear gas chamber can enter a slag discharging channel through a gas way, and can be directly used for blowing shaft bottom rock powder, the cleaning effect and the work efficiency of a shaft bottom can be improved, the advantages of being simple in structure, and facilitating part replacing are achieved, and the drilling efficiency and adaptation to the hard and complex bottom layer can be greatly improved.

Description

technical field [0001] The invention relates to a pneumatic down-the-hole impact hammer, which belongs to the technical field of rock drilling equipment. Background technique [0002] Rock and soil drilling engineering has occupied an increasingly important place in the current economic construction of our country. Its application fields not only involve mineral exploration and development, but more and more involve construction, water supply, municipal administration, transportation, environment, etc. . With the accelerated pace of economic globalization, this type of project is getting bigger and bigger in the international and domestic markets, and the requirements are getting higher and higher. At present, China's economy will remain at the climax of economic and industrial construction, with a new round of rapid development and mineral resource development, the market demand will be greater and continue to grow in the impactor. The birth and development of the pneumat...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a pneumatic down-the-hole impact hammer that can effectively improve the rock breaking efficiency of the drill bit, has a simple structure, facilitates the replacement of parts, and solves the problem that the existing impactor is prone to breakage at the piston tail

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