A Quickly Changing Drill Bit for Earthquake Engineering Survey

Abstract

The invention relates to the field of drill bit connection technology, in particular to a quick-change drill bit for seismic engineering survey, including a drill bit, a connecting device and a drill rod; the other end of the connecting device is fixedly connected to the drill rod; the connecting device includes a connecting body, a piston and a drill rod. Clamping device; the connecting body is provided with a first accommodation cavity, a piston cavity and a threaded cavity; one end of the clamping device is located in the first accommodating cavity, and the other end is located at the lower end of the connecting body; one end of the piston is located in the piston cavity, and the other end is located in the threaded cavity Inside; the communication between the piston chamber and the first accommodation chamber; liquid is installed in the first accommodation chamber; the clamping device includes a connecting piece, a traction piece and a fixing piece; the traction piece can scale and float on the surface of the liquid, and the traction piece is elastic buoyancy The ball; one end of the connecting piece is connected with the traction piece, and the other end is connected with the fixing piece, and the fixing piece passes through the first accommodating cavity, and one end of the fixing piece is located at the lower part of the first accommodating cavity. The drill bit can be replaced quickly, and the structure is simple and the service life is long.

Description

technical field [0001] The invention relates to the technical field of drill bit connection, in particular to a quick-change drill bit for seismic engineering investigation. Background technique [0002] When digging or drilling a hole, the drill bit rotates around the vertical axis and moves axially at the same time. The soil is cut under the action of the torque and axial force of the drill bit, and is destroyed and loosened under the action of the extrusion and centrifugal force of the working blades, forming a soil flow and pressing to the pit wall, and at the same time, it is lifted to the surface along the page. When the soil flow moves to the place where there is no pit wall, the broken soil is thrown around the pit due to the centrifugal force, and the entire pit digging process is completed. Moreover, the drill bit will release heat during the working process, causing the drill bit to wear quickly during use, with a short service life and needs to be replaced frequ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention aims at the troublesome replacement of the drill bit in the prior art, and the safety problem caused by the high temperature generated when the drill bit is working, and the safety problem caused by the cooperation failure, and provides a quick-change drill bit for seismic engineering investigation.

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