Drilling bucket and rotary drilling rig

Abstract

The invention discloses a drilling bucket and a rotary drilling rig, wherein the drilling bucket comprises a drilling bucket upper bottom part, a drilling bucket lower bottom part, and a drilling bucket barrel connecting the drilling bucket upper bottom part with the drilling bucket lower bottom part, and the maximum diameter of the drilling bucket barrel is larger than the maximum diameter of the drilling bucket upper bottom part and the maximum diameter of the drilling bucket lower bottom part. The drilling bucket provided by the invention adopts the invention of unequal diameters, the maximum diameter of the drilling bucket barrel is designed to be larger than the maximum diameter of other parts of the drilling bucket, then the drilling bucket barrel can be in tight fit with the hole wall in the drilling process and has certain drilling guide effect, the problem of deflective drilling is effectively solved, the impact on the drilling bucket and the lateral force transmitted upwards to structures like a drilling rod and a mast are reduced, the working stability of a main engine structure of the rotary drilling rig is improved, and meanwhile, the hole wall is fixed. The rotary drilling rig provided by the invention also has the benefits.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a drilling bucket and a rotary drilling machine with the drilling bucket. Background technique [0002] At present, the rotary drilling rig has been widely used in pile foundation construction. During the construction process, the rotary drilling rig transmits torque and pressure to the drill pipe, and the drill pipe transmits torque and pressure to the drilling tool (such as a drill bucket, etc.). The currently used drilling bucket structure is as follows: figure 1 As shown, it mainly includes the following parts: the upper bottom of the drilling bucket 1, mainly including the connecting square, the upper bottom of the drilling bucket, the unlocking guide rod of the drilling bucket, etc.; the drilling bucket cylinder 2 is a cylinder structure with a certain diameter; the drilling bucket The lower bottom 3 mainly includes the bottom of the bucket, picks and the like. The pi...

AI Technical Summary

Problems solved by technology

The picks of the drilling tool are usually staggered at the bottom of the drilling tool, and the outermost picks are usually inclined outwards. The diameter of the circle formed by the picks is actually slightly larger than the diameter of the drill bucket body 2, plus the drilling When the drilling tool itself shakes, when drilling into soft soil layers or geological structures that are prone to hole collapse, there will be a large gap between the hole wall of the drilled hole and the wall of the drilling tool barrel, and the gap size is usually 3cm to 10cm , the existence of the gap causes the drill bucket to produce a hole deviation during the drilling process, that is, the actual drilling position during the drilling process deviates from the expected drilling position, and the impact and swing generated at the drill bucket are easily transmitted to the drill pipe and then transmitted to the main structure such as the mast, causing the main structure such as the mast to shake, affecting the stability of the rotary drilling rig during work, and easily causing damage to the structural parts

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