Cyclone high wind pressure down-hole hammer with tail pipe

Abstract

The invention relates to a cyclone high wind pressure down-hole hammer with a tail pipe. The cyclone high wind pressure down-hole hammer with the tail pipe comprises a rear joint, a check valve, a gas distribution rod, a piston, an inner cylinder, an outer sleeve, a clamp ring, a front joint and a drill. The check valve is a single-direction valve and provided with a valve seat and a spring. The piston is a thin and long piston with a hole channel. The tail end of the piston is arranged in a center air hole of the piston and provided with a drill tail pipe. The gas distribution rod and a gas entering seat at the rear end of the check valve are of an integral structure. The inner cylinder is arranged outside the gas distribution rod and the piston. When the piston moves, matching ends of the piston and the gas distribution rod are always arranged in the inner cylinder. Part of the piston and the outer sleeve form an empty cavity in between. The rest of the piston is matched with the inner cylinder. The gas distribution rod is integrated with the check valve. The cyclone high wind pressure down-hole hammer with the tail pipe is simple in structure, capable of achieving functions of positioning, absorbing shock and gas entering and stable and reliable in working. Contacted area between the piston and the inner cylinder is reduced, the inner cylinder is wear-resistant and a work pressure range of the hammer is wide.

Description

technical field [0001] The invention relates to a pneumatic impact device, in particular to a high wind pressure down-the-hole impactor with a cyclone and a tailpipe. Background technique [0002] The valveless down-the-hole hammer is a typical pneumatic impact device. It is the drilling tool of the down-the-hole drilling rig and the working mechanism of the drilling rig for drilling. This equipment is mainly used for drilling blast holes with a diameter of 65-305mm and a hole depth of 60m. [0003] Generally speaking, the drilling efficiency of a down-the-hole drilling rig depends largely on the performance of the impactor. At present, the valveless down-the-hole impactor used on the market is a DHD series piston tailpipe valveless double-cylinder structure down-the-hole impactor represented by Ingersoll Rand Corporation of the United States. Its characteristic is that when the piston moves, the big end impacts the drill bit, and the small end of the piston interacts with...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned non-valve double-cylinder submersible impactor has the following disadvantages: 1. There is a rubber ring between the valve seat and the rear joint, which can absorb a certain amount of energy by itself when the impactor is working. After a period of time, the aging and deformation of the rubber will cause vibration and seriously affect the matching accuracy of the various components, thereby reducing the work efficiency and shortening the working life of the impactor

2. The inner cylinder is a thin-walled part with complex processing and high production cost; because it is a vulnerable part, it is one of the key points that affect the service life and stability of the impactor

4. There are more intake and exhaust passages, resulting in greater air pressure loss

5. There are many air distribution channels on the piston, the air channel turns and the distance is long, and the gas pressure loss is large, which makes it sensitive to heat treatment reaction, stress concentration, and often fails early due to process and structural reasons.

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