High-wind-pressure impactor

Abstract

The invention discloses a high-wind-pressure impactor and relates to the technical field of impact tools driven by fluid pressure. The high-wind-pressure impactor comprises a front joint, a rear joint, an outer sleeve, a one-way valve, a guide sleeve, a drill bit, a support seat and a distribution rod; the key improvement is that: the impactor further comprises a hollow tubular piston; two inclined holes are symmetrically arranged on the side wall of the piston, wherein the inclined holes are respectively communicated with a rear air chamber and a front air chamber and penetrate through the side wall of the piston; two first ring-shaped grooves are respectively arranged on the walls of an inner hole of the piston, where the two inclined holes penetrate through the wall of the piston; and the right end of the distribution rod and the inner hole of the piston are matched in a sealing and sliding way. The high-wind-pressure impactor has the advantages that: through the change of the structure of the piston, the effective working area can be increased, the impact force is greatly increased, the utilization rate of compressed air is increased, the working efficiency is improved, and the application range is enlarged.

Description

Technical field [0001] The invention relates to the technical field of impact tools driven by fluid pressure. Background technique [0002] The air pressure impactor currently used is a valved double-cylinder type. The outer casing and the cylinder form an inner and outer cylinder. The air distribution mechanism has a valve plate. The compressed air sent into the impactor through the drill rod is alternately sent through the valve plate displacement. To the front and rear air chambers of the piston, the piston is reciprocated to impact the drill bit, and the impact energy is applied to the rock. This type of impactor has some disadvantages. First, due to the complex structure, there are many parts that need to move each other, which consumes a lot of gas and energy. High energy consumption and low work efficiency. The second is the frequent action of the valve, which is easy to damage, which can cause failure. The third is the small application range and can only be used under lo...

AI Technical Summary

Problems solved by technology

[0002] The wind pressure impactor currently used is a valved double-cylinder type. The outer casing and the cylinder form an inner and outer cylinder. The air distribution mechanism has a valve plate. To the front and rear air chambers of the piston, the piston reciprocates to impact the drill bit, and the impact energy is applied to the rock. This type of impactor has some disadvantages. First, due to the complex structure, there are many parts that need to move with each other, and the gas consumption is large. High energy consumption and low work efficiency. Second, the valve moves frequently and is easily damaged, resulting in failure. Third, the scope of application is small and can only be used under low wind pressure. In order to solve the above problems, there is currently a valveless valve on the market. The single-cylinder type medium and low wind pressure down-the-hole impactor includes outer casing, drill bit, front joint, rear joint, check valve, gas distribution rod and valve seat, which can effectively reduce air consumption and energy consumption and prolong the use of the impactor However, in the application process, because the positioning sleeve, valve seat and valve rod are connected by pins, the stability is poor, and the service life of the valve rod and valve seat is short. At the same time, because the piston uses an axial air channel for gas distribution , and the volume of the front and rear air chambers is small, it can only be used for medium and low wind pressure operation, and the efficiency is low

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