CN-121993044-A - Diameter-variable pressure-relief drill rod structure

CN121993044ACN 121993044 ACN121993044 ACN 121993044ACN-121993044-A

Abstract

The invention relates to the technical field of drill rods and discloses a variable-diameter pressure relief drill rod structure which comprises a tail inner rod, wherein a cross bracket is adopted to rotate and connected with an adjusting disc assembly in the rear end of the tail inner rod, the inner side end of a reaming member is in sliding connection with the adjusting disc assembly, a motor fixed in the middle of the rear end of the cross bracket is used for driving the adjusting disc assembly to rotate, the reaming member stretches and reduces relative to the tail inner rod through rotation of the adjusting disc assembly, a follow-up gear member meshed with a central gear at the front end of the adjusting disc assembly is further arranged on the cross bracket, a locking assembly is arranged at the front end of the cross bracket through an extension plate, and the locking assembly is used for fixing the adjusting disc assembly and the reaming member through clamping the follow-up gear member. The invention has flexible and accurate diameter variation and strong adaptability, can perform operations with different drilling diameters in different sections of various roadways, improves more flexibility and efficiency for drilling pressure relief technology, and ensures the operation safety.

Inventors

HUANG AIXIN
TANG ZHI
CHENG SHIYANG
LIAO WEINAN
YU MINGQIU
LV JINGUO
WANG ZIAN
ZHAO YUE

Assignees

辽宁工程技术大学鄂尔多斯研究院

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (8)

1. The diameter-variable pressure-relief drill rod structure comprises a tail inner rod and is characterized in that the front end of the tail inner rod is connected with a drill bit, the tail inner rod is circularly and equidistantly connected with a reaming piece in a telescopic mode, the rear end of the tail inner rod is rotatably connected with an adjusting disc assembly through a cross bracket, and the inner side end of the reaming piece is in sliding connection with the adjusting disc assembly; the motor fixed in the middle of the rear end of the cross bracket is used for driving the rotation of the adjusting disc assembly, and the rotation of the adjusting disc assembly realizes the expansion and the reduction of the reaming piece relative to the inner rod of the end section; The cross support is further provided with a follow-up gear piece meshed with the central gear at the front end of the adjusting disc assembly, the front end of the cross support is provided with a locking assembly through an extension plate, and the locking assembly is used for fixing the adjusting disc assembly and the reaming piece through clamping the follow-up gear piece.
2. The variable diameter pressure relief drill rod structure of claim 1, wherein an external thread column is arranged at the center of the rear end of the drill bit, and the external thread column is in threaded connection with an internal thread connecting hole at the front end of the inner rod of the end section.
3. The diameter-variable pressure relief drill rod structure of claim 1, wherein the surface of the inner rod of the end section is circular and is uniformly distributed with through grooves which are communicated with a central cavity at the rear end of the inner rod of the end section; The reaming piece comprises a sliding block inserted through the through groove, an arc-shaped reaming plate connected with the outer side end of the sliding block and an inward-shrinking arc-shaped sloping plate connected with the side edge of the arc-shaped reaming plate, and reaming protrusions are arranged on the surfaces of the arc-shaped reaming plate and the inward-shrinking arc-shaped sloping plate.
4. The structure of the variable diameter pressure relief drill rod of claim 3, wherein a first sliding connection rod is arranged at the inner side end of the sliding block; The cross support supports the inner wall of the central cavity, the adjusting disc assembly comprises an I-shaped rotary disc, a first sliding chute is arranged on the side wall of the I-shaped rotary disc, and two ends of the first sliding chute are in sliding connection with the corresponding first sliding chute.
5. The structure of a variable diameter pressure relief drill pipe of claim 4, wherein the central gear is centrally fixed at the front end of the I-shaped rotary table, and a rotary shaft fixed at the middle of the central gear penetrates through the cross support and then is connected with the output end of the motor.
6. The structure of a variable diameter pressure relief drill pipe as set forth in claim 1, wherein the follower gear comprises a rotating rod movably connected to the cross bracket, a front end gear fixed at the front end of the rotating rod, and a driven gear fixed at the rear end of the rotating rod, the front end gear being engaged with the sun gear.
7. The structure of the variable diameter pressure relief drill rod of claim 1, wherein the locking assembly comprises an electric cylinder, a cross moving seat with an output end fixed on the electric cylinder, a driving arm connected with the cross moving seat in a sliding way, and an arc-shaped buckle tooth seat with a front end fixed on the driving arm; The driving arm is movably connected between the two corresponding groups of extension plates by adopting a pin shaft.
8. The structure of the variable diameter pressure relief drill pipe of claim 7, wherein the rear end of the extension plate is fixedly provided with a cross fixing seat, the electric cylinder is centrally fixed at the rear end of the cross fixing seat, and a piston rod at the output end of the electric cylinder penetrates through the cross fixing seat and is fixedly connected with the cross moving seat; The U-shaped seat on the cross movable seat is slidably connected between the two corresponding groups of extension plates, and a second sliding connection rod is fixed at the rear end of the driving arm; the U-shaped seat is characterized in that a second sliding chute is arranged on the side wall of the U-shaped seat, and two ends of the second sliding rod are in sliding connection with the corresponding second sliding chute.

Description

Diameter-variable pressure-relief drill rod structure Technical Field The invention relates to the technical field of drill rods, in particular to a variable-diameter pressure relief drill rod structure. Background Rock burst is a dynamic phenomenon of severe coal rock destruction occurring in mine roadways or working surfaces. In order to improve the safety of tunneling operation, a large-diameter drill rod is generally adopted for drilling and pressure relief, high stress is released or transferred to the deep part, and the stress concentration phenomenon in a tunneling area is eliminated. However, the existing pressure relief drill rod structure has the defects that firstly, the aperture is fixed and not adjustable, the pressure relief drill rod structure cannot adapt to pressure relief drilling requirements of different geological conditions and different stress distribution areas, and has extremely poor flexibility, secondly, the reaming structure is loosely connected with the drill rod main body, an accurate driving positioning mechanism is lacked, the reaming diameter adjustment precision is low, and the diameter deviation is easy to occur due to the influence of vibration in the drilling process, so that the pressure relief effect is unstable. Disclosure of Invention The invention aims to provide a variable-diameter pressure relief drill rod structure so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a variable diameter release drilling rod structure, includes last section interior pole, the front end of last section interior pole is connected with the drill bit, be circular equidistant telescopic connection on the last section interior pole and have reaming spare, the inside cross support that adopts of last section interior pole rear end rotates and is connected with the regulating disk subassembly, reaming spare inboard end and regulating disk subassembly sliding connection; the motor fixed in the middle of the rear end of the cross bracket is used for driving the rotation of the adjusting disc assembly, and the rotation of the adjusting disc assembly realizes the expansion and the reduction of the reaming piece relative to the inner rod of the end section; The cross support is further provided with a follow-up gear piece meshed with the central gear at the front end of the adjusting disc assembly, the front end of the cross support is provided with a locking assembly through an extension plate, and the locking assembly is used for fixing the adjusting disc assembly and the reaming piece through clamping the follow-up gear piece. Preferably, an external thread column is arranged at the center of the rear end of the drill bit, and the external thread column is in threaded connection with an internal thread connecting hole at the front end of the inner rod of the tail section. Preferably, through grooves are distributed on the surface of the inner rod of the end section at equal intervals in a circular shape, and the through grooves are communicated with a central cavity at the rear end of the inner rod of the end section; The reaming piece comprises a sliding block inserted through the through groove, an arc-shaped reaming plate connected with the outer side end of the sliding block and an inward-shrinking arc-shaped sloping plate connected with the side edge of the arc-shaped reaming plate, and reaming protrusions are arranged on the surfaces of the arc-shaped reaming plate and the inward-shrinking arc-shaped sloping plate. Preferably, a first sliding connection rod is arranged at the inner side end of the sliding block; The cross support supports the inner wall of the central cavity, the adjusting disc assembly comprises an I-shaped rotary disc, a first sliding chute is arranged on the side wall of the I-shaped rotary disc, and two ends of the first sliding chute are in sliding connection with the corresponding first sliding chute. Preferably, the central gear is centrally fixed at the front end of the I-shaped rotary table, and a rotary shaft fixed in the middle of the central gear penetrates through the cross support and then is connected with the output end of the motor. Preferably, the follow-up gear piece comprises a rotating rod movably connected on the cross bracket, a front end gear with the front end fixed to the rotating rod and a driven gear with the rear end fixed to the rotating rod, and the front end gear is meshed with the central gear. Preferably, the locking component comprises an electric cylinder, a cross moving seat fixed at the output end of the electric cylinder, a driving arm connected with the cross moving seat in a sliding way and an arc-shaped buckle tooth seat fixed at the front end of the driving arm; The driving arm is movably connected between the two corresponding groups of extension plates by adopting a pin shaft. Preferably,