Drill rod structure based on rotary drilling rig

Abstract

The invention discloses a drill rod structure based on a rotary drilling rig, and relates to the technical field of drill rods. The drill rod structure solves the problems of poor assembly firmness and inconvenience in assembly operation of a drill rod of an existing rotary drilling rig, the drill rod structure comprises a square head and a main rod body, second fixing screws are embedded in the bottoms of connecting strips through threads correspondingly. When the device is assembled, the main rod body, a second bearing disc and an embedded table are assembled into a set of fixed structure, then a first bearing disc, the second bearing disc and the main rod body are fastened into a set of structure, and finally the outer side of the main rod body is welded to an arc-shaped notch in the outer side of the second bearing disc, so that the overall firmness is improved; after the device is fixed, the first bearing disc, the second bearing disc and the main rod body are fixedly connected through multiple sets of structures, the number of connecting structures is large, pressure borne by the connecting structures during drilling can be dispersed by all the structures, therefore, the pressure borne by each connecting structure can be reduced, the overall firmness degree can be greatly improved, only one position needs to be welded, and operation is very convenient during assembling.

Description

technical field [0001] The invention relates to the technical field of drill rods, in particular to a drill rod structure based on a rotary excavator. Background technique [0002] In the hole-forming process of concrete pouring piles below the surface, the rotary drilling rig is one of the commonly used foundation engineering construction equipment. Rotary drilling rigs usually use friction-type or machine-locking drill pipes, and with corresponding drill bits / drilling tools, they can complete various foundation drilling operations. The square head located at the lower part of the drill pipe is connected with different specifications of drill bits / drilling tools through the pin shaft parts, so as to realize the transmission of rotational torque. Whether it is a friction type or a machine lock type drill pipe, most of them are made of multi-sections stacked on each other, and the innermost section of the drill pipe is the longest, with a square head at the bottom and a main...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a drill rod structure based on a rotary drilling machine, so as to solve the problem that the existing rotary drilling machine drill rods in the above-mentioned background technology all pass through the circular insert on the top of the square head and the main body when assembling. The bottom of the rod body is fitted, and then assembled by welding. However, even if there are more welding positions after fixing in this way, there are fewer connecting and supporting structures. When drilling, most of the pressure will directly act on this connecting structure. However, the welding part cannot withstand too much pressure, and the firmness is still poor when used, and the multiple welding during assembly is a waste of time and inconvenient to assemble.

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