Drilling device for coal mining

Patent metadata

Field	Value
Publication number	US-12018534-B1
Application number	US-202418403435-A
Country	US
Kind code	B1
Filing date	Jan 3, 2024
Priority date	Aug 16, 2023
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A drilling device for coal mining is provided, including a placement board. The placement board is fixedly connected to a first support pillar and a second support pillar, and the first support pillar and the second support pillar are together fixedly connected to a transmission rod; the transmission rod is connected to support rods symmetrically distributed in a limited sliding manner, and the support rods symmetrically distributed are connected to a connecting rod in a sliding manner; the connecting rod is provided with grooves evenly distributed in a circumferential direction, the grooves are fixedly connected to pneumatic telescopic blocks, and the telescopic end of each pneumatic telescopic block is fixedly connected to an arc-shaped plate. The arc-shaped plate is extended in a circumferential direction to support the drilled hole close to the drill bit, preventing the collapse of the drilling wall close to the drill bit.

First claim

What is claimed is:

1. A drilling device for coal mining, comprising a placement board, wherein the placement board is fixedly connected to a first support pillar and a second support pillar, the first support pillar and the second support pillar are together fixedly connected to a transmission rod, the transmission rod is connected to support rods symmetrically distributed in a limited sliding manner, the support rods symmetrically distributed are connected to a connecting rod in a sliding manner, a first cavity is set inside the connecting rod, the connecting rod is fixedly connected to a first gas pipe interconnected with the first cavity of the connecting rod, the connecting rod is rotationally connected to a drill rod, a second cavity set inside of the drill rod is interconnected with a high-pressure gas pipe, the first support pillar is fixedly connected to a second motor, an output shaft of the second motor is fixedly connected to a first lead screw that is rotationally connected to the first support pillar and the second support pillar, the first lead screw is threadedly connected to a rectangular connecting block fixedly connected to the connecting rod, the rectangular connecting block is fixedly connected to the first motor, an output shaft of the first motor is fixedly connected to the drill rod, the rectangular connecting block is connected to the drill rod in a limited rotating manner, the drill rod is fixedly connected and interconnected with a drill bit, the connecting rod is fixedly connected to arc-shaped blocks evenly distributed in a circumferential direction, the connecting rod is provided with grooves evenly distributed in a circumferential direction, pneumatic telescopic blocks are fixedly connected to the grooves, the pneumatic telescopic blocks are interconnected with the first cavity of the connecting rod, a telescopic end of each pneumatic telescopic block is fixedly connected to an arc-shaped plate, the arc-shaped plate slides between adjacent arc-shaped blocks, and the connecting rod is provided with a blocking mechanism for drilling sealing;
the blocking mechanism comprises a first seal housing, the first seal housing is slidably connected to the support rods, the first seal housing is fixedly connected to a sealing inner ring, a dust filter screen is arranged between the sealing inner ring and the first seal housing, the sealing inner ring is fixedly connected to a first gas bag, the first gas bag is interconnected with a second gas pipe, the second gas pipe extends through the first seal housing and the sealing inner ring, the first seal housing is connected to a gas pump, the gas pump is slidably connected to the placement board through a connecting block; the first seal housing is slidably connected to the second seal housing, the second seal housing is fixedly connected to linear actuators symmetrically distributed, a telescopic end of each linear actuator is fixedly connected to the first seal housing, the second seal housing is fixedly connected to a second gas bag, the second gas bag is connected to a third gas pipe, the second seal housing is provided with a gas detector, the second seal housing is interconnected with an L-shaped dust removal pipe, the L-shaped dust removal pipe is fixedly connected to the placement board, a vertical part of the L-shaped dust removal pipe is provided with spray nozzles distributed in a circumferential direction, the L-shaped dust removal pipe is fixedly connected to a third motor that is fixedly connected to the placement board, a conveyor belt is arranged in the L-shaped dust removal pipe, an output shaft of the third motor is fixedly connected to a drive shaft of the conveyor belt, and the placement board is provided with a cutting mechanism;
the cutting mechanism comprises a connecting shaft, the connecting shaft is fixedly connected to the placement board, the connecting shaft is rotatably connected to a transmission gear, the placement board is provided with a rectangular groove, the placement board is slidably connected to an L-shaped gear rack, one end of the L-shaped gear rack close to the first support pillar is provided with a rectangular block sliding inside the rectangular groove, a transverse part of the L-shaped gear rack is formed in a wedge shape, the placement board is provided with a limit sliding groove, a limit block is slidably connected inside the limit sliding groove of the placement board, the limit block matches with the transverse part of the L-shaped gear rack, an elastic component is fixedly connected between the placement board and the limit block, a tension spring is arranged between the rectangular block of the L-shaped gear rack and the placement board, the telescopic end of each linear actuator is fixedly connected to an unlocking plate, the unlocking plate matches with the limit block, the connecting shaft is rotatably connected to a gas chamber, the gas chamber is provided with an outer ring and an inner ring, the inner ring is provided with a hole that matches the outer ring, the inner ring of the gas chamber is fixedly connected to the transmission gear, and input ends of the first gas pipe and the second gas pipe are interconnected to the outer ring of the gas chamber.

2. The drilling device for coal mining according to claim 1 , wherein an end of each pneumatic telescopic block close to the drill bit is formed in a triangular shape to reduce an accumulation of dust during the drilling process.

3. The drilling device for coal mining according to claim 1 , wherein a frictional force between the first seal housing and the second seal housing is greater than a frictional force between the first seal housing and the connecting rod.

4. The drilling device for coal mining according to claim 1 , wherein a diameter of the drilled hole drilled by the drill bit is greater than a diameter of an outer ring of the second seal housing.

5. The drilling device for coal mining according to claim 4 , wherein an inner ring of the gas chamber that matches a connection between an outer ring of the gas chamber and the second gas pipe is formed in an arc-shaped groove.

6. The drilling device for coal mining according to claim 1 , further comprising a replacement mechanism configured for switching the drill bit, wherein the replacement mechanism is arranged on two sides of the first support pillar and the second support pillar; the replacement mechanism comprises a first load-bearing plate, the first load-bearing plate is rotatably connected to the transmission rod, and the transmission rod is rotatably connected to a second load-bearing plate, the first load-bearing plate and the second load-bearing plate are symmetrically distributed; and the first load-bearing plate is fixedly connected to a first L-shaped connecting plate, the first L-shaped connecting plate is fixedly connected to a self-locking motor, and an output shaft of the self-locking motor is fixedly connected to the transmission rod.

7. The drilling device for coal mining according to claim 6 , further comprising the explosive filling assembly, wherein the explosive filling assembly is configured to fill the hole with explosives, and the explosive filling assembly is arranged between the first support pillar and the second support pillar; the explosive filling assembly comprises a connecting cylinder, the connecting cylinder is provided with symmetrically distributed sliding grooves, two ends of the connecting cylinder are fixedly connected to the first support pillar and the second support pillar, the connecting cylinder is fixedly connected to a fixing ring, and the connecting cylinder is slidably connected to a moving ring; the fixing ring is rotatably connected to a second lead screw, the moving ring and the second lead screw are in threaded fit, the con

Assignees

• Univ Shandong Science & Tech

Inventors

• Guo Weiyao
• Zhang Yueying
• Zhao Yongqiang
• Guo Wenjing
• Zhang Chengguo
• Wang Xiangyu
• Zhao Tongbin
• Tan Yunliang

Classifications

• E21B21/015

  Means engaging the bore entrance, e.g. hoods for collecting dust · CPC title

• E21C37/00

  Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14) · CPC title

• E21B19/081 Primary

  Screw-and-nut feed mechanisms · CPC title

• E21B3/02

  Surface drives for rotary drilling · CPC title

• E21B21/011

  Dust eliminating or dust removing while drilling · CPC title