Soil-layer broaching bit

Abstract

The utility model relates to the field of drilling tools in geotechnical engineering industries, and particularly relates to a soil-layer broaching bit. The utility model aims to provide a soil-layer broaching bit for solving the problems that cut soil bodies are easily accumulated, the broaching diameter is small, and the broaching bit is easily blocked and the like in the process of broaching. The soil-layer broaching bit provided by the invention comprises a pedestal (1), vanes (2), an airflow distributor (3), a bit head (4), a piston (5), a clamping pin (6), an expanding spring (7), airflow through holes (8), airflow holes (9) and an air hole (10). The main principle of the soil-layer broaching bit is as follows: an airflow is blown out of a plurality of airflow holes (9) which are opposite to the airflow direction in an aeration pipe and different in direction through the airflow distributor (3) and blown to the vanes (2), and the airflow is blown to the cut soil bodies from the airflow through holes (8) on the vanes (2), so that the cut soil bodies are blown out of the holes, thereby not only ensuring the smoothness of the interior of a drilled hole, but also enabling the bit not to be blocked. The soil-layer broaching bit provided by the invention has the advantages that the fault rate is low, the broaching diameter is large, and the bit head has less possibility of being blocked.

Description

technical field [0001] The invention relates to the field of drilling tools in the geotechnical engineering industry, in particular to a soil layer reaming drill bit. Background technique [0002] In the geotechnical engineering industry, such as pouring foundation, foundation reinforcement, slope treatment, etc., it is often necessary to expand the bottom of the borehole or other areas in order to increase the load-bearing area. It cannot be completed, and a professional reaming drill is required to complete it. [0003] At present, the existing reaming bits, especially the pneumatic reaming bits, the wind direction is all downward or blowing to the side, so that the soil cut off during reaming is very easy to block the existing borehole, and the drill bit is buried. On the other hand, compared with the original drilling, after the reaming operation, the diameter of the reaming is very small. When the drilling is small and the required reaming is large, the existing drill ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a soil layer reaming drill bit that solves the proble

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