Ultra-large-diameter rotary excavating drill bit

Abstract

The invention relates to an ultra-large-diameter rotary excavating drill bit. The ultra-large-diameter rotary excavating drill bit comprises a barrel, a cutting disc and an opening and closing device,wherein the barrel and a base plate are connected in an opening and closing mode, a base plate reinforcing box body is arranged on the base plate, a cutting disc reinforcing plate is welded to the middle of the lower surface of the cutting disc, a center shaft penetrates through the base plate, the base plate reinforcing box body, the cutting disc and the cutting disc reinforcing plate; cutting toothed plate reinforcing ribs are arranged on the lower surface of the cutting disc; the value of the inclination angle beta of a cutting toothed plate relative to the cutting disc is 45 to 60 degrees; and reinforcing structures are designed for the barrel, an upper plate and the base plate. The ultra-large-diameter rotary excavating drill bit has the advantages that (1) the strength and the working reliability of the cutting toothed plate are increased, and the stress of cutting teeth is relatively reduced; (2) a double-lining-plate structure is adopted in a position, where a rotary shaft sleeve is installed, of the barrel, so that the tearing risk of a connecting welding seam is reduced; (3) the construction safety and the opening and closing stability of the base plate can be guaranteedby double opening and closing mechanisms; and (4) the rigidity and the wear resistance of the barrel, the upper plate and the base plate are increased through the structural strengthening design of the barrel, the base plate and the upper plate, so that the requirement of large load capacity is met.

Description

technical field [0001] The invention relates to a rotary drilling device, in particular to a super large diameter rotary drilling bit used for a rotary drilling machine. Background technique [0002] With the rapid development of economy and science and technology, a large number of super high-rise buildings, medium and long-span bridges, port waterway wharves, ocean engineering, etc. have emerged, which makes foundation design and construction face huge challenges. Large-scale civil engineering pile foundation construction is an important foundation link in civil engineering construction. At present, the rotary drilling rig is an important equipment for pile foundation construction. With the continuous expansion of civil engineering, the performance of the rotary drilling rig is also improving. More than three meters) pile foundation construction needs. The ultra-large caliber rotary drilling bit has fast drilling speed, large force, and high excavation efficiency. The tr...

AI Technical Summary

Problems solved by technology

The ultra-large caliber rotary drilling bit has fast drilling speed, large force, and high excavation efficiency. The traditional structure of the rotary drilling bit cannot adapt to the working state of the ultra-large caliber rotary drilling bit. The existing rotary drilling bits mainly have the following problems: 1. 1. The cylinder body, upper plate, and lower plate have insufficient rigidity and wear resistance, and the load-bearing state is easy to defo

Images