CN-122014119-A - Drill rod convenient for quick discharge of slag from drill hole

CN122014119ACN 122014119 ACN122014119 ACN 122014119ACN-122014119-A

Abstract

The invention discloses a drill rod facilitating rapid discharge of slag from a drill hole, which belongs to the technical field of underground coal mine drilling equipment and comprises a connecting rod and a drill bit coaxially connected to the bottom end of the connecting rod; the bottom of the drill bit is coaxially provided with a group of central auxiliary crushing cutters, a plurality of groups of edge auxiliary crushing cutters and a plurality of groups of main crushing cutters, a slag discharging cavity which is convenient for slag at the bottom of the drill bit to flow to the top of the drill bit is arranged beside each main crushing cutter, the top of the side wall of each edge auxiliary crushing cutter is provided with slag discharging ports which are convenient for slag at the side part of the drill bit to flow to the top of the drill bit, and all the slag discharging ports are mutually communicated with the slag discharging cavity one by one. Through the collaborative design of the slag discharging cavity and the slag discharging port, a continuous slag flow channel from the bottom of the drill bit to the top is formed, the large slag generated by crushing can directly enter the slag discharging cavity, the side slag is gathered into the slag discharging cavity through the slag discharging port, and finally drilling holes are rapidly discharged along with drilling fluid or air flow, so that repeated crushing caused by accumulation of the slag at the bottom of the drill bit is avoided, and the cutter load and heat accumulation are reduced.

Inventors

KONG FANJUN
LIU JIGONG
WANG MINGXIU
LIU SHOUBING
BAO XINCHENG
MI SHIJUN
LIU HUI

Assignees

肥城矿业集团单县能源有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260228

Claims (8)

1. A drill rod facilitating rapid discharge of slag from a drill hole comprises a connecting rod vertically arranged and a drill bit coaxially connected to the bottom end of the connecting rod; The drill bit is characterized in that the bottom of the drill bit is coaxially provided with a group of central auxiliary crushing cutters positioned at the center of the drill bit, a plurality of groups of peripheral array edge auxiliary crushing cutters arranged around the central auxiliary crushing cutters, a plurality of groups of main crushing cutters arranged between the central auxiliary crushing cutters and the peripheral array edge auxiliary crushing cutters, a slag discharging cavity which is convenient for slag at the bottom of the drill bit to flow to the top of the drill bit is arranged beside each main crushing cutter, slag discharging ports which are convenient for slag at the side part of the drill bit to flow to the top of the drill bit are arranged at the top of the side wall of each peripheral auxiliary crushing cutter, and all the slag discharging ports are mutually communicated with the slag discharging cavities one by one.
2. The drill pipe for facilitating rapid discharge of slag from a borehole of claim 1, wherein the crushing portion of the central auxiliary crushing cutter is a vertically downward tapered crushing cutter.
3. The drill rod for facilitating rapid discharge of slag from a drill hole according to claim 2, wherein the top of the central auxiliary crushing cutter is connected with a vertically arranged positioning rod, the positioning rod is inserted into a positioning hole formed in the center of the drill bit, a positioning groove which is concave inwards is formed in the side wall of the positioning rod, a jackscrew which can be abutted against the positioning groove is arranged on the side face of the drill bit, and the jackscrew is completely hidden in the drill bit.
4. The drill pipe for facilitating rapid discharge of slag from a borehole according to claim 1, wherein the crushing portion of the edge assist crushing tool is a vertically downward facing annular crushing tool.
5. The drill pipe of claim 4, wherein the edge assist breaker is removably attached to the drill bit by a first screw that is completely concealed within the drill bit.
6. The drill pipe for facilitating rapid discharge of slag from a borehole according to claim 1, wherein the crushing portion of the main crushing cutter is a downwardly inclined crushing cutter.
7. The drill pipe of claim 6, wherein the primary crushing cutter is detachably connected to the drill bit by a second screw, wherein the second screw is completely concealed within the drill bit.
8. The drill rod for facilitating rapid discharge of slag from a borehole according to claim 1, wherein the heights of the crushing parts of the center auxiliary crushing cutter, the edge auxiliary crushing cutter and the main crushing cutter are sequentially increased, wherein the center auxiliary crushing cutter firstly contacts a target for crushing, and then the edge auxiliary crushing cutter and finally the main crushing cutter.

Description

Drill rod convenient for quick discharge of slag from drill hole Technical Field The invention relates to the technical field of underground coal mine drilling equipment, in particular to a drill rod which is convenient for quickly discharging slag from a drill hole. Background In the underground coal mine or roadway construction process, the drilling operation is a common basic process and is mainly used for key links such as gas extraction, water exploration, anchor rod installation and the like. The diameter of the drilled hole is mainly determined by the diameter of the drill bit, and the crushing efficiency and the working stability of the drill bit directly influence the drilling progress and the service life of equipment. The existing drill bit for coal mines has the following general technical problems: The slag discharging structure is lacking, a special channel for discharging slag is not specially arranged in the design of the traditional drill bit, and when the bottom of the drill bit is rotated at a high speed to crush rock, a cutter can only stop fragments formed by crushing the rock layer in the bottom of the drill bit or a cutter gap. The fragments cannot be discharged in time, and can only be crushed by a cutter rotating subsequently for two times or even multiple times until the fragments are crushed into fine fragments, and then the fragments can be slowly discharged along with drilling fluid; The overheating and life-time attenuation are that a great amount of friction heat is generated between the cutter and fragments by repeating the crushing process, slag is not smoothly discharged, so that the heat in the drill bit cannot be taken away by slag flowing, the content temperature is easy to rise, the abrasion and annealing softening of cutter materials can be accelerated by high temperature, meanwhile, the mechanical strength of the steel of the drill bit body is reduced, and the life of the drill bit is finally influenced. Disclosure of Invention The invention aims to solve the technical problems of providing a drill rod which is convenient for rapidly discharging slag from a drilled hole, and by optimizing the slag discharging structure design in the drill bit, slag generated by crushing can rapidly flow to the top of the drill bit and be discharged, so that the work load of the drill bit is reduced, the overheat risk is reduced, the service life and the drilling efficiency of the drill bit are obviously improved, and the problems of slag discharging structure deficiency, overheat and service life attenuation of the traditional drill bit are solved. In order to achieve the above purpose, the present invention provides the following technical solutions: A drill rod facilitating rapid discharge of slag from a drill hole comprises a connecting rod vertically arranged and a drill bit coaxially connected to the bottom end of the connecting rod; the core improvement points of the drill bit are that the bottom of the drill bit is coaxially provided with a group of central auxiliary crushing cutters positioned at the center of the drill bit, a plurality of groups of peripheral array edge auxiliary crushing cutters arranged around the central auxiliary crushing cutters, a plurality of groups of main crushing cutters arranged between the central auxiliary crushing cutters and the peripheral array edge auxiliary crushing cutters, a slag discharging cavity which is convenient for slag at the bottom of the drill bit to flow to the top of the drill bit is arranged beside each main crushing cutter, the top of the side wall of each peripheral auxiliary crushing cutter is provided with slag discharging ports which are convenient for slag at the side part of the drill bit to flow to the top of the drill bit, and all the slag discharging ports are mutually communicated with the slag discharging cavity one by one. Through adopting above-mentioned scheme, through the collaborative design of sediment chamber and row's cinder notch, form from drill bit bottom (main broken region) to the continuous slag charge flow channel of top (with the connecting rod link), the big piece slag charge that the breakage produced can directly get into sediment chamber, and the lateral part slag charge is through the sediment mouth and is assembled into sediment chamber, finally discharges the drilling along with drilling fluid or air current fast, avoids the slag charge to pile up the repeated breakage that leads to in the drill bit bottom, reduces cutter load and heat accumulation. As a drill rod preferred implementation mode which is convenient for rapidly discharging slag from a drill hole, the crushing part of the central auxiliary crushing cutter is a vertical downward conical crushing cutter, the conical structure of the central auxiliary crushing cutter enables crushing force to be concentrated in the central area of the drill bit, the core part of a rock stratum is crushed preferentially, initial crushing holes are fo