Air distribution system of rapid and energy-saving down-the-hole hammer for water well

Abstract

The invention discloses an air distribution system of a rapid and energy-saving down-the-hole hammer for a water well. The air distribution system comprises an outer pipe, an internal cylinder, a guide sleeve, an air distributor and a piston, wherein the outer surface of the internal cylinder and the inner surface of the outer pipe are matched to form a total air inlet passage of the air distribution system; the piston, the outer pipe and the guide sleeve are matched to form a front air chamber; the outer surface of the piston and the inner surface of the outer pipe are matched to form a front air chamber air inlet passage leading to the front air chamber; the piston, the internal cylinder and the air distributor are matched to form a rear air chamber. With adoption of the technical scheme, the air distribution system has the following technical effects: the problem of lapping damage and breakage of a matched surface of the piston and the internal cylinder of the down-the-hole hammer can be solved completely, the structure is reasonable, the pneumatic down-the-hole hammer is high in working pressure and low in air consumption, and 30% of energy is saved; single impact force is large, and the rock breaking capability is high; the working frequency and the working efficiency are high, the energy consumption is low, and the drilling speed is increased by 20%-35%.

Description

technical field [0001] The invention relates to a pneumatic down-the-hole drilling tool for agricultural irrigation water wells, in particular to an air distribution system for a fast energy-saving pneumatic down-the-hole hammer for large-caliber water wells. Background technique [0002] In recent years, the drought in the north has been getting worse, especially in Shandong, where large-aperture pneumatic DTH hammers have become more and more widely used on water wells. As the water level continues to drop, the depth of water well construction is getting deeper and deeper. The supporting equipment air compressor The pressure parameters are also continuously improved, up to 30Bar / 35m 3 / min. At present, most of the known pneumatic down-the-hole hammers for water wells have such problems: first, the mating surface between the piston of the down-the-hole hammer and the inner cylinder is too long, and the problem of grinding and fracture of the mating surface is prone to occu...

AI Technical Summary

Problems solved by technology

At present, most of the known pneumatic down-the-hole hammers for water wells have such problems: first, the mating surface between the piston of the down-the-hole hammer and the inner cylinder is too long, and the problem of grinding and fracture of the mating surface is prone to occur due to the loss of positioning accuracy during the working process; Second, due to the congenital deficiency of the gas distribution system of the known down-the-hole hammer, the structure is not optimized enough, the working pressure of the pneumatic down-the-hole hammer is low, generally at 19Bar, the speed of the air compressor remains high, the air consumption is large, and the economic benefit of the user is poor; third, As the diameter of water well construction continues to increase, the weight of the drill bit increases after the diameter of the drill bit increases. According to the principle of mirror transmission such as impact theory, the known down-the-hole hammer piston is light in weight, the energy loss in the hammer working process is large, and the single impact energy is small. , the rock-breaking ability is poor; Fourth, the known pneumatic DTH hammer has low operating frequency due to structural limitations. For the construction of large-aperture water wells, the total rock drilling efficiency is low and the energy consumption is high; finally, according to the analysis of relevant theories of fluid mechanics, Some mechanism design of pneumatic DTH hammer is unreasonable, the pressure loss is large, and the energy saving effect is poor

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