Bidirectional spiral drill bit

Abstract

A bidirectional spiral drill bit disclosed by the invention comprises a top cover, an outer barrel-shaped drill bit body and an inner barrel-shaped drill bit body; the inner barrel-shaped drill bit body is arranged in the outer barrel-shaped drill bit body, a side scraper is arranged on the side wall of an inner drill bit pipe body, and the bottom of a rotating shaft connecting block is fixedly connected with the top of the inner drill bit pipe body through a second fixing screw. According to the bidirectional spiral drill bit, a side scraper is arranged on the outer wall of the inner barrel-shaped drill bit body; the side scraper is in contact with the inner wall of the outer drill bit pipe body; during rotation, the side scraper effectively scrapes off soil on the inner wall of the outerbarrel-shaped drill bit body; the problem that rotation is affected due to too much soil between the outer barrel-shaped drill bit body and the inner barrel-shaped drill bit body, and the abrasion problem are solved; the service life of the outer barrel-shaped drill bit body and the inner barrel-shaped drill bit body is greatly prolonged, the outer barrel-shaped drill bit body and the inner barrel-shaped drill bit body are opposite in rotation direction, bidirectional rotation is achieved, the excavation effect is better, the soil smashing effect is better, the bidirectional spiral drill bitis not prone to being adhered to soil, and therefore cleanliness of the bidirectional spiral drill bit is kept.

Description

technical field [0001] The invention relates to the technical field of drill bits, in particular to a bidirectional helical drill bit. Background technique [0002] Rotary drilling bit is a construction technology suitable for hole-forming operations in building foundation engineering. Widely used in municipal construction, highway bridges, high-rise buildings and other foundation construction projects, with different drilling tools, suitable for dry (short screw), or wet (rotary bucket) and rock formation (core drill) hole-forming operations, rotary drilling The drilling rig has the characteristics of large installed power, large output torque, large axial pressure, flexible maneuverability, high construction efficiency and multi-function. The rotary drilling rig is suitable for the soil and geological conditions in most areas of our country, and has a wide range of applications. It can basically meet the needs of bridge construction, high-rise building foundations and oth...

AI Technical Summary

Problems solved by technology

During construction, different drill bits are selected according to different soil and geological conditions, but when the drill bit is in use, the one-way rotation makes the inside easily stained with soil, especially the cylindrical drill bit, which has a bad influence on the use of the drill bit. It also reduces the effect of excavation

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