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Multi-claw drill suitable for loosening earth surface soil texture formed holes

A technology of loose ground and topsoil, which is applied in the direction of earthwork drilling, drill bits, drilling equipment, etc. It can solve the problems of bit bit drill pipe, difficult to pull out, and single function, so as to avoid drill sticking, slag discharge, dispersion fluency, and improve The effect of tunneling performance

Active Publication Date: 2015-03-25
CHINA METALLURGICAL CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the drill bit of above-mentioned this structure only has the hole-forming function that is applicable to general stable rock-soil body, and function is single; The phenomenon that the drill pipe is not easy to pull out

Method used

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  • Multi-claw drill suitable for loosening earth surface soil texture formed holes

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, a group claw drill suitable for forming holes in loose surface soil includes a drill body 1 and a drill shank 5 . On the axis of the drill body 1, a through hole 6 for ventilation and water is provided, a concave hole 7 is provided in the middle of the drill shank 5, and a tool bayonet 8 is symmetrically provided on the drill shank 5 and on the side wall of the concave hole 7. Two or more front claws 2 are evenly distributed on the front part of the drill body 1 (in this embodiment, there are two front claws 2), and a plurality of middle claws 3 are evenly distributed on the middle circumference of the drill body 1 (In this embodiment, there are four middle claws 3 ). On the circumference of the drill body 1 , a plurality of rear claws 4 are evenly distributed near the drill shank 5 (in this embodime...

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Abstract

The invention discloses a multi-claw drill suitable for loosening earth surface soil texture formed holes. The multi-claw drill comprises a drill bit body and a drill handle. Front claws are arranged on the front portion of the drill bit body, middle claws are arranged on the periphery of the middle of the drill bit body, and rear claws are arranged on the periphery of the drill bit body and close to the drill handle. The distance between the top end of the each rear claw and the axis of the drill bit body is larger than that between the top end of each middle claw and the axis of the drill bit body. The distance between the top end of each middle claw and the axis of the drill bit body is larger than that between the top end of each front claw to the axis of the drill bit body. The front claws, the middle claws and the rear claws are axially arranged on the drill bit body in a staggered mode. According to the multi-claw drill suitable for loosening the earth surface soil texture formed holes, the front claws have positioning and guiding functions in the drilling process, the middle claws have the heading hole-forming function, and the rear claws have the function of expanding the holes. The defect that a single-layer drill claw is only suitable for forming holes in surface layer hard rock and soil is overcome, due to the fact that the drill claws are layered and staggered, the heading performance of the drill claws is greatly improved, and construction quality and construction work efficiency are greatly improved in the construction work of slope support and hole forming of the loose earth surface soil texture.

Description

technical field [0001] The invention relates to a hole-forming drill bit in the field of construction engineering, in particular to a group-claw drill suitable for forming holes in loose surface soil. Background technique [0002] The drill bit can be used for drilling holes in the surface layer. The front claw of the drill bit is welded with an alloy head, which has certain wear resistance. [0003] The drill bit in the prior art mainly includes a drill body, a drill handle, drill claws distributed on the drill body, and the front end claw of the drill bit is welded with an alloy head. Concave holes for connecting drill rods are provided. [0004] But the drill bit of above-mentioned this structure only has the hole-forming function that is applicable to general stable rock-soil body, and function is single; The drill pipe is not easy to pull out. Therefore, there is an urgent need for a group claw drill that is suitable for forming holes in loose surface soil in the loo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/26E21B10/43
Inventor 陈国民宋平蒲建树
Owner CHINA METALLURGICAL CONSTR ENG GRP
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