Mining drill rod with drill-falling-preventing function

Abstract

The invention discloses a mining drill rod with a drill-falling-preventing function. The mining drill rod comprises a rod body, a male connector, a female connector, a falling-preventing connecting rod and a locking mechanism, wherein the male connector and the female connector are arranged at the two ends of the rod body correspondingly, the falling-preventing connecting rod is arranged in the male connector, and the locking mechanism is arranged in the female connector. When the drill rod is connected during drilling construction, the falling-preventing connecting rod enters an inner hole ofa fixing ring of the locking mechanism, when the male connector is screwed into the female connector by a certain depth, the small end face of the male connector makes contact with a variable-sectionpin of the locking mechanism, then the variable-section pin is pressed to move along the axis of the drill rod, a spring of the locking mechanism is compressed, and a clamping pin of the locking mechanism is pressed to move in the radial direction; and when a male connector shoulder makes contact with a female connector shoulder, at the moment, the variable-section pin presses the clamping pin toenter a clamping groove of the falling-preventing connecting rod, and drill rod mounting operation is completed. According to the mining drill rod, axial connection between the falling-preventing connecting rod and the locking mechanism after a thread of the male connector is broken is achieved, the drill rod at the deep position of the broken position can be lifted out, the drill-falling problemafter an existing drill rod is broken is effectively solved, and the safety of drilling construction is guaranteed.

Description

technical field [0001] The invention belongs to the field of underground drilling tools for coal mines, and in particular relates to a mining drill pipe with the function of preventing drill drop. Background technique [0002] Drilling is the most commonly used and most effective technical means for coal mine gas control, water damage prevention and ground stress relief, and drill pipe is an indispensable tool for drilling construction. During the drilling construction process, the drill rod transmits the power output by the drilling rig to the drill bit to achieve rock-breaking drilling. During the drilling process, the drill rod is subjected to various complex alternations such as feeding force, pulling force, torque, bending, vibration, friction, etc. Load, fatigue fracture will inevitably occur. [0003] At present, limited by the actual working conditions such as the space size of the underground roadway in the coal mine, the length of a single drill pipe is mainly 1m,...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects and deficiencies in the prior art, the present invention provides a mining drill pipe with the function of preventing drill pipe from falling out, so as to solve the problem of drill pipe dropout caused by the fracture of the drill pipe joint

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