Drilling and cleaning integrated coal seam drilling device and using method

Abstract

The invention belongs to the technical field of coal seam mining equipment, and particularly relates to a drilling and cleaning integrated coal seam drilling device and a using method. The device solves the problem of coal cinder residue during drilling, and comprises a rotary support frame; the drilling assembly is installed on the rotating supporting frame and comprises a multi-hole drill bit, a drilling rod and a drilling rod, the cleaning device is connected to the tail end of the multi-hole drill bit through a first rotating device, and the multi-hole drill bit is driven by the rotating device at the middle joint of the multi-hole drill bit and the cleaning device to conduct drilling and water injection; the supporting device is fixed to the rotating supporting frame, and the front end of the supporting device is connected with the cleaning device through a second rotating device; the backwater injection device is respectively communicated with the cleaning device and the interior of the porous drill bit; and the transmission device drives the water injection and return device to move forwards. According to the drilling device, accurate positioning of the drilling position is achieved, the drilling direction is changed, and the drilling quality is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal seam mining equipment, and in particular is a drilling and cleaning integrated coal seam drilling device and a use method thereof. Background Art

[0002] As the mine is mined deeper, the ground stress of the coal seam gradually increases, and disasters such as mine dust, coal and gas outbursts, and rock burst are becoming increasingly serious, threatening the safety of underground workers. Coal seam water injection plays an important role in preventing and controlling various disasters in mine production. High-pressure water injection can fractur the coal body, increase the porosity of the coal body, reduce the ground stress of the coal seam, improve the coal body structure, and increase the permeability of the coal seam, which can achieve the purpose of preventing geological disasters. Before water injection into the coal seam, the coal wall must be drilled. The quality of the drilling affects the quality of water injection into the coal seam. When drilling water into the coal seam, too fast a drilling speed will accelerate the crushing of the coal body, forming a large amount of a mixture of coal slag and water, blocking the pores and cracks in the borehole, and affecting the effect of water injection into the coal seam. Therefore, it is necessary to find a new type of drilling equipment and method to obtain better quality coal seam drilling. Summary of the invention

[0003] In order to solve the problem of coal slag residue after drilling, the present invention realizes the functions of accurate positioning of drilling position, changing drilling direction, etc., and provides a drilling and cleaning integrated coal seam drilling device and a use method.

[0004] The present invention adopts the following technical scheme: a drilling and cleaning integrated coal seam drilling device, comprising: Rotating the support frame; A drilling assembly, the drilling assembly is mounted on a rotating support frame, and the drilling assembly comprises: Multi-hole drill bit; A cleaning device, wherein the cleaning device is connected to the rear end of the multi-hole drill bit through a first rotating device, and the multi-hole drill bit is driven by the rotating device at the middle connection with the cleaning device to perform drilling and water injection; A supporting device, wherein the supporting device is fixed to the rotating supporting frame, and a front end of the supporting device is connected to the cleaning device via a second rotating device; A water injection and return device, the water injection and return device is respectively connected to the cleaning device and the inside of the porous drill bit, and the water injection and return device can be extended as the porous drill bit drills; A transmission device drives the water injection and return device to move forward.

[0005] In some embodiments, the rotating support frame includes a rotating block, one end of a guard plate is hinged on the rotating block, the middle part of the guard plate is hinged to one end of a telescopic rod, the other end of the telescopic rod is hinged to a movable groove, the drilling assembly is installed on the movable groove and can slide along the movable groove; wherein an angle adjuster is installed on the rotating block.

[0006] In some embodiments, a water injection hole is arranged on the surface of the porous drill bit, a water reservoir is arranged inside the porous drill bit, the water reservoir is connected with the water injection hole, and the water reservoir is connected with a water source through a water injection device.

[0007] In some embodiments, a groove is provided on the outer side of the front end of the support device, a high-density sponge is provided in the groove, a retractable baffle is provided on the outer side of the groove, the retractable baffle is fixed to one end of the traction rod, and the retractable baffle is retracted by the traction rod controlled by the retractor; A drilling motor is arranged in the supporting device. There are four infrared emitters on the drilling motor. The drilling motor is connected to the infrared emitters through wires. The infrared rays emitted by the infrared emitters are projected onto the coal wall to determine the drilling position. The drilling motor is connected to the transmission device through a wire, the first rotating device and the second rotating device are connected to the drilling motor through a wire, and the drilling motor supplies power to the first rotating device and the second rotating device; A waste liquid pipe, the waste liquid pipe is connected to the water injection device; The front and rear ends of the support device clamp the water injection device through a fixer.

[0008] In some embodiments, the cleaning device includes a vacuum tube, in which a propeller and a crusher are arranged. The propeller is connected to the drilling motor via a wire, the drilling motor supplies power to the motor in the propeller, and the gears drive the motor to rotate. The crusher is connected to the drilling motor via a wire.

[0009] In some embodiments, the drilling motor is controlled by a motor controller, which includes a display screen and control buttons. The display screen is used to display the current state of the drilling assembly, and the control buttons are used to control the operation of the drilling assembly.

[0010] In some embodiments, the water injection device comprises: A reflux pipe, wherein the reflux pipe is installed on the supporting device, the front end of the reflux pipe is connected to the cleaning device, and the rear end of the reflux pipe is connected to the waste liquid pipe; A support water injection rod, wherein the support water injection rod passes through the inside of the return pipe, the front end of the support water injection rod passes through the inside of the cleaning device and is connected to the porous drill bit, the rear end of the support water injection rod is connected to the water source, and the support water injection rod injects water into the porous drill bit; The return pipe and the supporting water injection rod are driven forward by the transmission device.

[0011] In some embodiments, a plurality of holes are symmetrically arranged on both sides of the reflux pipe, and a shrink cover having the same size as the hole is arranged at the opening of each hole; The hole at the front end of the reflux pipe is connected to the groove provided with the high-density sponge through the connecting pipe, and a first protruding pipe is arranged in the connecting pipe, and the first protruding pipe is installed on the first protruding pipe spring; The hole at the rear end of the reflux pipe is communicated with the waste liquid pipe, a second protruding pipe is arranged in the waste liquid pipe, and the second protruding pipe is installed on a second protruding pipe spring.

[0012] In some embodiments, the retractable cover includes a shielding sheet and a spring, wherein the retractable cover at the rear end of the reflux pipe is used to couple with the second protruding pipe spring on the waste pipe, and the retractable cover at the front end of the reflux pipe is used to couple with the first protruding pipe; During the advancement of the water injection and return device, the first protruding tube and the second protruding tube are compressed when not coupled, the shrink cover maintains its original shape, and the water injection and return device is advanced forward; After coupling, the first protruding tube spring and the second protruding tube spring used to install the first protruding tube and the second protruding tube are harder than the spring for installing the baffle plate. The first protruding tube and the second protruding tube push open the baffle plate, and the reflux water flows into the reflux pipe and flows from the reflux pipe into the waste liquid pipe.

[0013] A method for using a drilling and cleaning integrated coal seam drilling device, comprising: Step A: Before drilling, rotate the support frame to adjust to the appropriate angle and telescopic length; Step B: Control the operation of the entire drilling assembly, the entire device starts to enter the working state, and can accurately locate the position where the hole needs to be drilled; Step C: adjusting the working strength of the multi-hole drill bit to drill the drilling assembly into the coal wall; Step D: After the support device enters the borehole, press the baffle switch. At this time, the retractor controls the traction rod to retract the retractable baffle into the support device, and the high-density sponge begins to expand to block the gap in the inner wall of the borehole; then loosen the fixture, connect the new section of the water injection and return device to the previous one, and after the connection, tighten the fixture, and the water injection and return device is pushed forward by gear transmission; Step E: The injected water is injected into the porous drill bit by supporting the water injection rod to form waste liquid together with the coal slag, which is then absorbed into the cleaning device and enters the connecting pipe after being treated; at this time, a part of the unabsorbed waste liquid flows to the high-density sponge, and after being absorbed, it is merged into the connecting pipe together with the waste liquid through the reflux pipe, and finally enters the waste liquid pipe and flows out of the device.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The drilling assembly of the present invention fully absorbs the coal slag generated during the drilling process through the dust suction pipe and the propeller, thereby solving the problem of coal slag residue remaining during drilling.

[0015] The lasers of the four infrared transmitters on the drilling assembly of the present invention are projected onto the coal wall, which can accurately locate the drilling position.

[0016] The present invention can realize water injection drilling at the side and top of the coal seam by rotating the rotating support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a coal seam drilling device integrated with drilling and cleaning for drilling a coal seam in the present invention; Figure 2 is a schematic diagram of a rotating support frame; Figure 3 is a schematic diagram of a rotating block; Figure 4 is a schematic diagram of a mobile tank; Figure 5 is a schematic diagram of a drilling assembly; Figure 6 is a schematic diagram of a multi-hole drill bit and a cross-sectional view thereof; Figure 7 is a schematic diagram of a cleaning device; Figure 8 is a schematic diagram of the supporting device; Fig. 9 is a schematic diagram of the motor controller; Fig.10 is a schematic diagram of the water injection hole; Fig.11 A schematic diagram of the coupling of the protruding tube and the compression cover; Fig.12 A schematic diagram of the operation of the drilling device; Fig.13 Schematic diagram of three modes of drilling device; Fig.14 is a schematic diagram of a transmission device; Fig.15 is a schematic diagram of a first rotating device; Fig.16 is a schematic diagram of a second rotating device; The reference numerals in the figure are: 1-rotating support frame, 11-rotating block, 12-guard plate, 13-retractable rod, 14-moving slot, 111-angle adjuster, 1111-angle control button, 1112-angle display screen, 2-drilling assembly, 21-porous drill bit, 211-water injection hole, 212-water reservoir, 22-cleaning device, 23-support device, 24-motor controller, 25-water injection device, 221-dust suction pipe, 222-propeller, 223-crusher, 231-retractable baffle, 232-traction rod, 233-retractor, 234-drilling motor, 235-fixer, 236-waste liquid pipe, 237-infrared transmitter, 238-high-density sponge, 239- Connecting tube, 2391-first protruding tube, 2392-waterproof pad, 2393-first protruding tube spring, 2361-second protruding tube, 2362-second protruding tube spring, 241-display screen, 242-control button, 251-support water injection rod, 252-retractable cover, 253-reflux pipe, 2521-shielding piece, 26-first rotating device, 261-rotating motor, 262-slow gear, 263-medium speed gear, 264-high speed gear, 265-rotating shell, 266-fixed shell, 267-gear adjustment lever, 27-second rotating device, 271-fixed gear lever, 272-buckle, 28-transmission device, 281-knob, 282-patch, 283-puller. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, a drilling and cleaning integrated coal seam drilling device comprises: Rotate the support frame 1; The drilling assembly 2 is mounted on the rotating support frame 1, and the drilling assembly 2 includes: Multi-hole drill bit 21; A cleaning device 22, wherein the cleaning device 22 is connected to the rear end of the porous drill 21 through a first rotating device 26, and the porous drill 21 is driven by the rotating device at the middle connection with the cleaning device 22 to perform drilling and water injection; A supporting device 23, wherein the supporting device 23 is fixed to the rotating support frame 1, and a front end of the supporting device 23 is connected to the cleaning device 22 via a second rotating device 27; A water injection device 25, the water injection device 25 is connected to the cleaning device 22 and the inside of the porous drill bit 21 respectively, and the water injection device 25 can be extended as the porous drill bit 21 drills; The transmission device 28 drives the water injection and return device 25 to move forward.

[0020] like Figure 2 As shown, the rotating support frame 1 includes a rotating block 11, on which one end of a guard plate 12 is hinged, the middle of the guard plate 12 is hinged to one end of a telescopic rod 13, the other end of the telescopic rod 13 is hinged to a moving groove 14, and the drilling assembly 2 is mounted on the moving groove 14 and can slide along the moving groove 14; wherein an angle adjuster 111 is mounted on the rotating block 11. The angle adjuster 111 is powered by a wire, and can adjust the relative angle between the rotating block 11 and the guard plate 12, the relative angle between the guard plate 12 and the telescopic rod 13, the relative angle between the telescopic rod 13 and the moving groove 14, and the telescopic length of the telescopic rod 13. The angle adjuster 111 has four rows and two columns of angle display screens 1112 and angle control buttons 1111. The left column displays the information of the currently controlled device, and the right column displays the parameters to be adjusted. From top to bottom, the relative angle information between the rotating block 11 and the guard plate 12, the relative angle information between the guard plate 12 and the telescopic rod 13, the relative angle information between the telescopic rod 13 and the moving slot 14, and the telescopic length of the telescopic rod 13 are respectively displayed.

[0021] like Figure 6 As shown, a water injection hole 211 is arranged on the surface of the porous drill bit 21 , a water reservoir 212 is arranged inside the porous drill bit 21 , the water reservoir 212 is connected with the water injection hole 211 , and the water reservoir 212 is connected with a water source through a water injection device 25 .

[0022] like Figure 8 As shown, a groove is arranged outside the front end of the support device 23, a high-density sponge 238 is arranged in the groove, a retractable baffle 231 is arranged outside the groove, the retractable baffle 231 is fixed to one end of the traction rod 232, and the retractable baffle 231 is retracted by the traction rod 232 controlled by the retractor 233; A drilling motor 234 is provided in the support device 23. There are four infrared emitters 237 on the drilling motor 234. The drilling motor 234 is connected to the infrared emitters 237 through wires. The infrared rays emitted by the infrared emitters 237 are projected onto the coal wall to determine the drilling position. The drilling motor 234 is connected to the transmission device 28 through a wire, and the first rotating device 26 and the second rotating device 27 are connected to the drilling motor 234 through a wire, and the drilling motor 234 supplies power to the first rotating device 26 and the second rotating device 27; A waste liquid pipe 236, wherein the waste liquid pipe 236 is connected to the water injection device 25; The front and rear ends of the support device 23 clamp the water injection device 25 through the fixer 235.

[0023] like Figure 7 As shown, the cleaning device 22 includes a dust suction tube 221, in which a propeller 222 and a crusher 223 are arranged. The propeller 222 is connected to a drilling motor 234 via a wire, and the drilling motor 234 supplies power to the motor in the propeller 222, which is driven by gears to rotate; the crusher 223 is connected to the drilling motor 234 via a wire.

[0024] like Fig. 9 As shown, the drilling motor 234 is controlled by a motor controller 24 , and the motor controller 24 includes a display screen 241 and a control button 242 . The display screen 241 is used to display the current state of the drilling assembly 2 , and the control button 242 is used to control the operation of the drilling assembly 2 .

[0025] like Fig.10 , 11 As shown, the water injection device 25 includes: A reflux pipe 253, wherein the reflux pipe 253 is installed on the supporting device 23, the front end of the reflux pipe 253 is connected to the cleaning device 22, and the rear end of the reflux pipe 253 is connected to the waste liquid pipe 236; A support water injection rod 251, wherein the support water injection rod 251 passes through the inside of the return pipe 253, the front end of the support water injection rod 251 passes through the inside of the cleaning device 22 and is connected to the porous drill bit 21, and the rear end of the support water injection rod 251 is connected to the water source, and the support water injection rod 251 injects water into the porous drill bit 21; The return pipe 253 and the supporting water injection rod 251 are driven forward by the transmission device 28 .

[0026] A plurality of holes are symmetrically arranged on both sides of the return pipe 253, and a shrink cover 252 having the same size as the hole is arranged at the opening of each hole; The hole at the front end of the return pipe 253 is connected to the groove provided with the high-density sponge 238 through the connecting pipe 239. A first protruding pipe 2391 is provided in the connecting pipe 239. The first protruding pipe 2391 is installed on the first protruding pipe spring 2393. The hole at the rear end of the reflux pipe 253 is connected to the waste liquid pipe 236 . A second protruding pipe 2361 is arranged in the waste liquid pipe 236 . The second protruding pipe 2361 is installed on the second protruding pipe spring 2362 .

[0027] The retractable cover 252 includes a shielding piece 2521 and a spring. A spring mounting piece is provided in the reflux pipe 253. The end of the spring is fixed on the spring mounting piece in the reflux pipe 253. The retractable cover 252 at the rear end of the reflux pipe 253 is used to couple with the second protruding pipe spring 2362 on the waste liquid pipe 236. The retractable cover 252 at the front end of the reflux pipe 253 is used to couple with the first protruding pipe 2391. During the advancement of the water injection and return device 25, the first protruding tube 2391 and the second protruding tube 2361 are compressed when not coupled, the shrink cover 252 maintains its original state, and the water injection and return device 25 is advanced forward; After coupling, the first protruding tube spring 2393 and the second protruding tube spring 2362 used to install the first protruding tube 2391 and the second protruding tube 2361 are harder than the spring for installing the shielding piece 2521. The first protruding tube 2391 and the second protruding tube 2361 push open the shielding piece 2521, and the refluxed water flows from the high-density sponge 238 into the reflux pipe 253, and flows from the reflux pipe 253 into the waste liquid pipe 236.

[0028] A waterproof pad 2392 is added to the end of the connecting pipe 239 to prevent leakage.

[0029] like Fig.14 As shown, the drilling motor 234 is connected to the transmission device 28 through a wire, and the knobs 281 on both sides rotate under the control of the drilling motor 234, driving the puller 283 to move forward and backward. When the puller 283 moves forward, the patch 282 is closely attached to the water injection and return device 25, driving the water injection and return device 25 to move forward; when the puller 283 moves backward, the patch 282 is separated from the water injection and return device 25, preparing to pull the water injection and return device 25 forward next time.

[0030] like Fig.15 As shown, the drilling motor 234 is connected to the first rotating device 26 through the water injection device 25, and the wire is connected to the rotating motor 261 through the fixed shell 266. The gear adjustment lever 267 is set on the output shaft of the rotating motor 261, and the gear adjustment lever 267 is set on the slow gear 262, the medium speed gear 263 and the high speed gear 264. The gear adjustment lever 267 adjusts the slow gear 262, the medium speed gear 263 and the high speed gear 264 to engage with the gears of the rotating shell 265 respectively, so that the rotating shell 265 rotates, and the rotating shell 265 is connected to the porous drill bit 21, so that the rotating shell drives the porous drill bit 21 to rotate together.

[0031] like Fig.16As shown, the first rotating device 26 and the second rotating device 27 have basically the same structure, except that the first rotating device 26 can control the movement of three gears through the gear adjustment rod 267 to adjust the rotation speed. The second rotating device 27 has only one slow gear on the fixed gear rod 271. The dust suction pipe 221 is connected to the second rotating device 27 through the buckle 272, and the rotation of the second rotating device 27 drives the rotation of the dust suction pipe 221. The second rotating device 27 is connected to the drilling motor 234 through a wire, and the drilling motor 234 supplies power to the second rotating device 27.

[0032] A method for using a drilling and cleaning integrated coal seam drilling device, comprising: Step A: Before drilling, rotate the support frame 1 to adjust it to a suitable angle and telescopic length; Step B: Control the operation of the entire drilling assembly 2, so that the entire device starts to enter a working state and can accurately locate the position where the hole needs to be drilled; Step C: adjusting the working strength of the porous drill bit 21 to drill the drilling assembly 2 into the coal wall; Step D: After the support device 23 enters the borehole, the baffle switch is pressed, and the retractor 233 controls the traction rod 232 to retract the retractable baffle 231 into the support device 23, and the high-density sponge 238 begins to expand to block the gap in the inner wall of the borehole; then loosen the fixture 235, connect a new section of the water injection and return device 25 with the previous water injection and return device 25, and after the connection, tighten the fixture 235, and the water injection and return device 25 is pushed forward by gear transmission; Step E: The injected water is injected into the porous drill bit 21 by supporting the water injection rod 251 to form waste liquid together with the coal slag, and then absorbed into the cleaning device 22, and enters the connecting pipe 239 after treatment; at this time, a part of the unabsorbed waste liquid flows to the high-density sponge 238, and after absorption, it is merged into the connecting pipe 239 together with the waste liquid through the reflux pipe 253, and finally enters the waste liquid pipe 236 and flows out of the device.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling and cleaning integrated coal seam drilling device, characterized in that: include: Rotating the support frame (1); A drilling assembly (2), wherein the drilling assembly (2) is mounted on the rotating support frame (1), and the drilling assembly (2) comprises: Multi-hole drill bit (21); A cleaning device (22), wherein the cleaning device (22) is connected to the rear end of the porous drill bit (21) via a first rotating device (26), and the porous drill bit (21) performs drilling and water injection under the drive of the rotating device at the middle connection with the cleaning device (22); A supporting device (23), wherein the supporting device (23) is fixed to the rotating supporting frame (1), and a front end of the supporting device (23) is connected to the cleaning device (22) via a second rotating device (27); A water injection and return device (25), the water injection and return device (25) being connected to the cleaning device (22) and the interior of the porous drill bit (21) respectively, and the water injection and return device (25) being able to extend as the porous drill bit (21) drills; A transmission device (28), wherein the transmission device (28) drives the water injection and return device (25) to move forward.

2. The integrated drilling and cleaning coal seam drilling device according to claim 1, characterized in that: The rotating support frame (1) comprises a rotating block (11), one end of a guard plate (12) is hingedly connected to the rotating block (11), the middle part of the guard plate (12) is hingedly connected to one end of a telescopic rod (13), the other end of the telescopic rod (13) is hingedly connected to a movable groove (14), and the drilling assembly (2) is mounted on the movable groove (14) and can slide along the movable groove (14); wherein an angle adjuster (111) is mounted on the rotating block (11).

3. The drilling and cleaning integrated coal seam drilling device according to claim 1, characterized in that: A water injection hole (211) is provided on the surface of the porous drill bit (21), a water reservoir (212) is provided inside the porous drill bit (21), the water reservoir (212) is connected to the water injection hole (211), and the water reservoir (212) is connected to a water source via a water injection and return device (25).

4. The drilling and cleaning integrated coal seam drilling device according to claim 1, characterized in that: The support device (23) is provided with a groove on the outside of the front end, a high-density sponge (238) is provided in the groove, a retractable baffle (231) is provided on the outside of the groove, the retractable baffle (231) is fixed to one end of the traction rod (232), and the retractable baffle (231) is retracted by the traction rod (232) controlled by the retractor (233); A drilling motor (234) is arranged in the support device (23), and four infrared emitters (237) are arranged on the drilling motor (234). The drilling motor (234) is connected to the infrared emitters (237) via wires, and infrared rays emitted by the infrared emitters (237) are projected onto the coal wall to identify the drilling position; The drilling motor (234) is connected to the transmission device (28) via a wire, the first rotating device (26) and the second rotating device (27) are connected to the drilling motor (234) via a wire, and the drilling motor (234) supplies power to the first rotating device (26) and the second rotating device (27); a waste liquid pipe (236), the waste liquid pipe (236) being in communication with the water injection device (25); The front and rear ends of the support device (23) clamp the water return device (25) via a fixer (235).

5. The drilling and cleaning integrated coal seam drilling device according to claim 4, characterized in that: The cleaning device (22) comprises a dust suction pipe (221), wherein a propeller (222) and a crusher (223) are arranged in the dust suction pipe (221), wherein the propeller (222) and the drilling motor (234) are connected via a wire, and the drilling motor (234) supplies power to the motor in the propeller (222), which is driven by the gear to rotate; and the crusher (223) and the drilling motor (234) are connected via a wire.

6. The drilling and cleaning integrated coal seam drilling device according to claim 5, characterized in that: The drilling motor (234) is controlled by a motor controller (24), and the motor controller (24) comprises a display screen (241) and a control button (242). The display screen (241) is used to display the current state of the drilling component (2), and the control button (242) is used to control the operation of the drilling component (2).

7. The drilling and cleaning integrated coal seam drilling device according to claim 5, characterized in that: The water injection and return device (25) comprises: A reflux pipe (253), wherein the reflux pipe (253) is mounted on the support device (23), the front end of the reflux pipe (253) is connected to the cleaning device (22), and the rear end of the reflux pipe (253) is connected to the waste liquid pipe (236); A supporting water injection rod (251), wherein the supporting water injection rod (251) passes through the interior of the return pipe (253), the front end of the supporting water injection rod (251) passes through the interior of the cleaning device (22) to communicate with the porous drill bit (21), and the rear end of the supporting water injection rod (251) is connected to a water source, and the supporting water injection rod (251) injects water into the porous drill bit (21); The return pipe (253) and the supporting water injection rod (251) are driven forward by the transmission device (28).

8. The drilling and cleaning integrated coal seam drilling device according to claim 7, characterized in that: A plurality of holes are symmetrically arranged on both sides of the return pipe (253), and a shrink cover (252) having a size completely consistent with the hole opening is arranged at the hole opening of each hole; The hole at the front end of the return pipe (253) is connected to the groove provided with the high-density sponge (238) through the connecting pipe (239), and a first protruding pipe (2391) is provided in the connecting pipe (239), and the first protruding pipe (2391) is installed on the first protruding pipe spring (2393); The hole at the rear end of the reflux pipe (253) is in communication with the waste liquid pipe (236), a second protruding pipe (2361) is arranged in the waste liquid pipe (236), and the second protruding pipe (2361) is mounted on a second protruding pipe spring (2362).

9. The drilling and cleaning integrated coal seam drilling device according to claim 8, characterized in that: The retractable cover (252) comprises a shielding sheet (2521) and a spring, wherein the retractable cover (252) at the rear end of the return pipe (253) is used to couple with the second protruding pipe spring (2362) on the waste liquid pipe (236), and the retractable cover (252) at the front end of the return pipe (253) is used to couple with the first protruding pipe (2391); During the advancement of the water injection and return device (25), the first protruding tube (2391) and the second protruding tube (2361) are compressed when not coupled, the shrink cover (252) maintains its original state, and the water injection and return device (25) is advanced forward; After coupling, the first protruding tube spring (2393) and the second protruding tube spring (2362) used to install the first protruding tube (2391) and the second protruding tube (2361) are harder than the spring used to install the shielding sheet (2521). The first protruding tube (2391) and the second protruding tube (2361) push the shielding sheet (2521) away, and the refluxed water flows into the reflux tube (253), and then flows from the reflux tube (253) into the waste liquid tube (236).

10. A method for using the integrated drilling and cleaning coal seam drilling device according to claim 9, characterized in that: include: Step A: Before drilling, rotate the support frame (1) to adjust to a suitable angle and telescopic length; Step B: Controlling the operation of the entire drilling assembly (2), the entire device starts to enter a working state, and can accurately locate the position where the hole needs to be drilled; Step C: adjusting the working strength of the multi-hole drill bit (21) to drill the drilling assembly (2) into the coal wall; Step D: After the support device (23) enters the borehole, the baffle switch is pressed, and the retractor (233) controls the traction rod (232) to retract the retractable baffle (231) into the support device (23), and the high-density sponge (238) begins to expand to block the gap in the inner wall of the borehole; then the fixing device (235) is loosened, and a new section of the water injection and return device (25) is connected to the previous water injection and return device (25). After the connection, the fixing device (235) is tightened, and the water injection and return device (25) is pushed forward by the gear transmission; Step E: The injected water is injected into the porous drill bit (21) by means of the supporting water injection rod (251) and together with the coal slag forms waste liquid, which is then absorbed into the cleaning device (22) and enters the connecting pipe (239) after being processed; at this time, a portion of the unabsorbed waste liquid flows to the high-density sponge (238), and after being absorbed, it flows into the connecting pipe (239) together with the waste liquid through the reflux pipe (253), and finally enters the waste liquid pipe (236) and flows out of the device.

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