Auger Bit with Openable and Closeable Bottom Guard

Abstract

The invention relates to the field of underwater construction equipment, in particular to an auger bit with an openable bottom baffle. The auger bit further comprises a spiral-vane bit shank, a centering sleeve at the bottom of the bit and cutter teeth. The auger bit is characterized by further comprising a tubular side baffle and at least two layers of horizontal baffles disposed at the bottom of the tubular side baffle. The tubular side baffle is fixed at the bottom of the bit shank. Each horizontal baffle is provided with an opening. The horizontal baffles relatively rotate to open or close the openings. With the openable bottom baffle, soil is prevented from falling back into a hole when the bit is turned out. In addition, the hollow shank and the through holes on the centering sleeve and the shank guarantee evacuation of the bottom of the hole when the bit is turned out, so that the problem of shrinkage is avoided.

Description

technical field [0001] The invention relates to the field of underground construction equipment, in particular to an auger bit with an openable and closable bottom baffle. Background technique [0002] When the traditional auger bit is used in soft soil, silt, sand and other loose formations, due to the lack of sufficient resistance or barrier measures at the bottom of the drill bit, when the drill bit is pulled out, the sand attached to the drill bit will easily fall back into the hole; moreover, Due to the difficulty of grout filling up and down the drill bit, it is easy to cause a vacuum phenomenon at the bottom of the hole when the drill bit is pulled out, resulting in problems such as shrinkage cavities. Contents of the invention [0003] The object of the present invention is to provide an auger bit with an openable and closed bottom baffle, which can be applied to loose strata such as soft soil, silt, sandy ground, etc., and avoid vacuuming in holes when the bit is ...

AI Technical Summary

Problems solved by technology

[0002] When the traditional auger bit is used in soft soil, silt, sand and other loose formations, because there is not enough resistance or blocking measures at the bottom of the drill bit, when the drill bit is pulled out, the sand attached to the drill bit will easily fall back into the hole; moreover, Due to the difficulty of grout filling up and down the drill bit, it is easy to cause a vacuum phenomenon at the bottom of the hole when the drill bit is pulled out, resulting in problems such as shrinkage cavities

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