Clustered reaming pneumatic impact equipment for horizontal directional drilling machine

Abstract

Clustered reaming pneumatic impact equipment for a horizontal directional drilling machine is composed of equipment of a support body, pneumatic impacters mounted on the support body, an air distribution device, an end cover, a drilling rod connecting device and the like. The support body is of a cylinder-shaped structure with a center rod, and locating circular holes are formed in two side plates of a cylinder and used for mounting the pneumatic impacters. Cylindrical threads are formed on joints of the pneumatic impacters, and the pneumatic impacters are fixed on the side plates of the support bodies through nuts. A stepped circular hole is formed in the center of the air distribution device, air vent hole channels are evenly distributed inside the air distribution device, provide high-pressure air for the impacters, and the air distribution device is connected with the support body through screws. The end cover provided with sealing cushions mounted on the air distribution device to form a sealing air cavity inside the air distribution device. The drilling rod connecting device is mounted at the center of the right side plate of the support body, and a thread structure is formed inside the drilling rod connecting device connected with a drilling rod of the horizontal directional drilling machine. The structure is simple and reliable, and the problem that large diameter reaming is difficult through the horizontal directional drilling machine in complex stratums such as rock and pebble gravel can be effectively solved.

Description

technical field [0001] The invention relates to a cluster type reaming pneumatic percussion device for a horizontal directional drilling rig, in particular to a cluster type pneumatic percussion device capable of reaming holes and laying pipes in complex formations such as rocks, pebbles and gravels. Background technique [0002] Underground pipelines are an important part of urban infrastructure, including water supply, drainage, gas, heat, electricity, and industrial pipelines. Due to the requirements for the protection of ground buildings and construction efficiency, more and more urban underground pipelines are laid using horizontal directional drilling technology. Horizontal directional drilling technology is to use the drilling equipment on the surface to drill into the bottom layer at a small incident angle relative to the ground to form a pilot hole, and then expand the diameter of the pilot hole to the required size step by step, and lay the pipeline of a technique...

AI Technical Summary

Problems solved by technology

[0006] (1) The manufacturing of large-diameter reverse reaming pneumatic impactors requires high processing technology, high manufacturing difficulty, high manufacturing cost, and is prone to processing quality problems

[0007] (2) The large-diameter reverse reaming pneumatic impactor is bulky and heavy, and the pullback force of the horizontal directional drilling rig during non-excavation construction cannot meet the pipe laying pullback requirements of the large-diameter reverse reaming pneumatic impactor

[0008] (3) Due to the large diameter, the structure of each part of the reverse reaming pneumatic impactor is heavy. Once a problem occurs during construction, it must be disassembled and repaired as a whole, which delays the construction progress and requires high maintenance costs.

After several reverse reaming pneumatic impactors are clustered together to form a whole, each drill bit cannot move relatively independently, loses its independence, and cannot achieve the purpose of rock breaking

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