Novel down-the-hole sampling coring pneumatic percussion drilling tool

Abstract

The invention discloses a novel down-the-hole sampling coring pneumatic percussion drilling tool. The novel down-the-hole sampling coring pneumatic percussion drilling tool comprises a connector connected with one end of an outer cylinder, the other end of the outer cylinder is connected with a drive chuck, the tail end of a center drill bit is slidably connected into the drive chuck, a drill bitvent hole and a drill bit center hole are formed in the center drill bit, a limiting mechanism is arranged at the sliding connection position between the drive chuck and the tail end of the center drill bit and moves by a step pitch, a piston center hole, a piston first radial through hole, a piston large-diameter tangential section, a piston second radial through hole, a piston axial through holeand a piston inner circumferential annular groove are formed in a piston, the tail end of a gas distribution pipe is in communication with the connector, a gas distribution pipe radial through hole is formed in the head end of the gas distribution pipe, a gas distribution seat gas inlet channel and a gas distribution seat center hole are formed in a gas distribution seat in a penetrating manner,reciprocating switching impact is realized through selective connection of the holes, and the head end of a collecting pipe is inserted into the tail end of the drill bit center hole for coring. The drilling tool can meet the requirements for efficient rock drilling and convenient coring, and the integration level is high.

Description

technical field [0001] The invention relates to the technical field of impactor manufacturing, in particular to a novel down-the-hole sampling coring pneumatic percussion drilling tool. Background technique [0002] Pneumatic down-the-hole hammer, also known as pneumatic down-the-hole hammer, is a pneumatic mechanical drilling tool for engineering that uses compressed air as power to push the hammer (piston) to hit the drill bit to form holes. During the rock drilling process, the impactor and the drill bit are connected through the drill pipe and dive into the hole to break the rock at the same time. The working efficiency is not affected by the depth of the hole, hence the name of the down-the-hole impactor. Pneumatic down-the-hole hammer drilling technology is widely used in blast hole construction, hydrological well drilling, geological core exploration, reservoir dam foundation curtain grouting, engineering geological exploration, trenchless pipeline laying, building fo...

AI Technical Summary

Problems solved by technology

In the prior art, when collecting samples from the rock center, it is often encountered that the collected samples are polluted and lost due to untimely collection.

Moreover, the integrated structure of the impactor and the coring assembly is not perfect, and it cannot meet the perfect cooperation between high-efficiency percussion rock drilling and coring. Therefore, this drilling tool still has a lot of room for improvement

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