Variable diameter barrel drill device

Abstract

The invention relates to a reducing barrel-type drill bit device which comprises a fixed rod. A connection part is fixedly arranged at the top of the fixed rod; a regulation rod is arranged in the fixed rod; the regulation rod is provided with regulation holes along a length direction of the regulation rod; a dowel runs through the fixed rod; the dowel is inserted in one regulation hole to fix thefixed rod and the regulation rod; the bottom of the regulation rod is fixedly connected with a drilling table; the upper part of the fixed rod is fixedly connected with a first rotating seat; at least two folding supporting units are arranged between the drilling table and the first rotating seat of the fixed rod along the circumferential direction; each folding supporting unit comprises a secondrotating seat, a first connection rod, a second connection rod and a connection seat; the second connection rods are rotationally connected between the first rotating seat and the connection seats; the first connection rods are rotationally connected between the connection seats and the second rotating seats; the bottom of the drilling table is fixedly connected with a first drilling part; the first connection rods are provided with second drilling parts; the second connection rods are provided with third drilling parts. According to the invention, working efficiency can be effectively improved, and labor intensity is reduced.

Description

technical field [0001] The invention relates to a rotary drilling rig for building construction, in particular to a variable-diameter cylindrical drill bit device for the rotary drilling rig. Background technique [0002] In civil engineering, the filling pile is used as the foundation of the building. Usually, a rotary drilling rig is used for drilling. The torque and pressure output by the rotary drilling rig are finally transmitted to the barrel drill. , in order to improve the drilling quality and drilling efficiency, it is necessary to drill in sections, first drill a number of small-sized holes in the pile diameter, and then drill holes of the same size as the pile, and then cycle down in turn Drilling to the required depth, although this improves the drilling quality and drilling efficiency, but the barrel drills of different sizes need to be replaced back and forth, and every time a cycle is completed, it needs to be replaced with a slag bucket to catch the drilling ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the prior art that it is time-consuming and labor-intensive to replace the drilling tool continuously and reduce the work efficiency, and proposes a variable-diameter barrel drill device

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