Rotary excavating drill bit

Abstract

The invention relates to a rotary excavating drill bit which comprises a drum, wherein a cover plate is arranged on an opening of the drum; a connecting square head is arranged on the outer surface of the cover plate; an opening device penetrates through the cover plate and is arranged in the drum; a drill bit component is moveably connected with the drum through a pin shaft; the drill bit component comprises an annular body; a plurality of cutting drills are arranged at the bottom edge of the annular body; inclined angles exist between the axes of the cutting drills and the axes of the annular body; a hook plate is arranged on the inner surface of the annular body; connecting lugs are symmetrically arranged on the inner surface on the other side of the annular body; a hook hole is formed in the hook plate; and the axle holes are formed in the connecting lugs. Due to the design, the rotary excavating drill bit is suitable for the drilling piling operation of the puddle and large gravel-containing soil foundation. The defect that the traditional flat-base and conical-base rotary excavating drill bits cannot continue construction if encountering with large gravels can be overcome, so that the construction efficiency of the rotary excavating drill bit can be greatly increased.

Description

technical field [0001] The invention relates to the field of rotary drilling rig drilling tools, and is particularly suitable for rotary drilling hole-forming operations in high backfill areas where the backfill soil layer contains a large amount of slightly weathered sandstone, block stones, gravels, pebbles and the like. Background technique [0002] In the process of civil construction, rotary drilling rigs are often used for drilling and piling operations on the foundation. The rotary drilling rig is one of the most important parts of the rotary drilling rig, and its structural performance has an important impact on the working efficiency of the rotary drilling rig. At present, the rotary drilling bit suitable for soil layer geology is a double-bottom rotary drilling bit. There are multiple bottom plates at the bottom, and cutting teeth are arranged in the center and around the bottom plate. The soil enters the cylinder from the gap in the bottom plate. When encountering...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rotary drilling bit, which has a simple structure and can be applied to the drilling and piling operations of foundations containing large gravels, pebbles, and breeze fossil blocks in clay and soil layers, and can overcome the traditional The flat-bottomed and cone-bottomed rotary drilling bits encounter the disadvantage that large stones cannot continue construction, thus greatly improving the construction efficiency of the rotary drilling bit, ensuring the construction progress, and improving the construction quality at the same time

Images