Fully hydraulic down-the-hole rotary percussion drill bit for piling in rock and soil layer

Abstract

The invention discloses a full-hydraulic down-hole rotating impact combined drill bit for pilling a rock and soil layer. The full-hydraulic down-hole rotating impact combined drill bit comprises a rotary power unit and a combined hydraulic impact hammer unit, wherein working torque of the rotary power unit in the full-hydraulic down-hole rotating impact combined drill bit is output by a hydraulic motor or a hydraulic speed reducer through a gear group, meanwhile, the hydraulic motor or the hydraulic speed reducer drives a hollow shaft, a hydraulic oil rotary joint and the combined hydraulic impact hammer unit to rotate, and thus rotary grinding is realized; meanwhile, impact power of the combined hydraulic impact hammer unit in the full-hydraulic down-hole rotating impact combined drill bit is output by a hydraulic hammer and is transmitted to an alloy-embedded hammer plate on an impact hammer fixing main body, the impact power of the alloy-embedded hammer plate directly acts on a rock layer, and thus impact crushing is realized; through the simultaneous action of the rotary grinding and the impact crushing, quick excavation construction is realized.

Description

technical field [0001] The invention belongs to a drilling tool for pile foundation engineering, and in particular relates to a rock-soil layer piling construction drill bit with small limitations and easy operation. Background technique [0002] In the prior art, in the construction of pile foundations in rock and soil layers, the drilling equipment or pneumatic down-the-hole hammer in the rotary cutting mode is mostly used for piling construction in the rock and soil layers, but the output torque of the rotary cutting drilling equipment and the drilling Under the requirement of high inlet pressure, the configuration requirements of the whole machine are high, the cost of drilling equipment is high, and the damage rate of drill bit and main engine is also high. In addition, the pneumatic down-the-hole hammer cannot drill super-large and ultra-deep rock pile holes, and it cannot solve the technical problem that the wall of the pneumatic down-the-hole hammer is easy to collap...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, in the construction of pile foundations in rock and soil layers, the drilling equipment or pneumatic down-the-hole hammer in the rotary cutting mode is mostly used for piling construction in the rock and soil layers, but the output torque of the rotary cutting drilling equipment and the drilling Under the requirement of high-inlet pressure, the configuration requirements of the whole machine are high, the cost of drilling equipment is high, and the damage rate of drill bit and main engine is also high

In addition, the pneumatic down-the-hole hammer cannot drill super-large and ultra-deep rock pile holes, and it cannot solve the technical problem that the wall of the pneumatic down-the-hole hammer is easy to collapse

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