Drill rod connecting device

Abstract

The invention relates to the field of drilling machines, in particular to a drill rod connecting device. The drill rod connecting device includes a female joint and a male joint, the male joint is fixed to an end socket of a drill rod, and the female joint is fixed to a drilling machine; the male joint is of a polygon cylinder structure, a ladder hole for containing the male joint is formed in thecenter of the female joint, and the ladder hole includes a polygon hole segment and a threaded hole segment; the polygon hole segment is located at one side close to the drilling machine, the hole diameter of the threaded hole segment is larger than that of the polygon hole segment, and the shapes of the polygon hole segment and the cross section of the male joint cylinder are consistent and thesizes are identical, a rod body of the drill rod is sleeved with a threaded sleeve, and one end of the barrel is placed in the threaded hole segment and forms a thread fit with the threaded hole segment. The male joint is connected to the female joint, and the fixing of the drill rod can be achieved by tightening the barrel. The cooperative relationship of polygon bore logs between the male jointand the female joint can provide positive torque and reverse torque, and the problem that the drill rod is prone to falling off when the drilling machine reversely rotates is solved.

Description

technical field [0001] The invention relates to the field of drilling rigs, in particular to a connecting device for drill rods. Background technique, [0002] In the geotechnical engineering investigation of lines in plains, hills and other areas, because line engineering often crosses fields and rivers, the traffic conditions are generally poor, and low-voltage lines do not have too high requirements for geological conditions, and only need to determine the range of the bearing layer Inner rock and soil mechanical parameters. From this, a kind of artificial auger drilling tool is gradually developed, each drill pipe is one meter, which is light and efficient. Its main components are: handle, drill pipe, threaded drilling tools, etc. The drill tool is drilled by manually rotating the handle, the drill tool is lifted up to take out the soil, and the state of the rock and soil is roughly obtained through empirical judgment of the soil. [0003] The current connection metho...

AI Technical Summary

Problems solved by technology

[0004] 1. The threads of the male and female joints are easily blocked by soil when they are disassembled and used at the construction site. The soil will harden after drying. When it is used next time, it will be inconvenient to twist the threads when the joints are installed; And the thread will be deformed due to collision during installation, which will affect the next joint installation

[0005] 2. The length of the current male joint is equal to the depth of the female joint. If soil is mixed into the female joint, there will be a gap between the male joint and the female joint during installation, and the soil is easy to squeeze in when drilling.

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