An integrated drilling and cleaning device for coal seam boreholes and its usage method

Abstract

The present invention belongs to the technical field of coal seam mining equipment, and specifically relates to an integrated drilling and cleaning coal seam drilling device and a usage method thereof. The present invention solves the problem of coal slag residue during drilling, and includes a rotating support frame; a drilling assembly, the drilling assembly is installed on the rotating support frame, and the drilling assembly includes: a multi-hole drill bit; a cleaning device, 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 drills holes and injects water under the drive of the rotating device at the middle connection between the multi-hole drill bit and the cleaning device; a support device, the support device is fixed to the rotating support frame, and the front end of the support device is connected to the cleaning device through a second rotating device; a water injection and return device, the water injection and return device is respectively communicated with the inside of the cleaning device and the multi-hole drill bit; a transmission device, the transmission device drives the water injection and return device to move forward. The present invention realizes accurate positioning of the drilling position and change of the drilling direction, and effectively improves the quality of drilling.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal seam mining equipment, and specifically relates to an integrated drilling and cleaning coal seam drilling device and a usage method thereof. Background Art

[0002] As the mine is being mined deeper, the in-situ stress of the coal seam gradually increases, and disasters such as mine dust, coal and gas outburst, and rock burst become increasingly serious, threatening the safety of underground workers. Coal seam water injection plays an important role in preventing various disasters in mine production. By high-pressure water injection, the coal body can be fractured, the porosity of the coal body can be increased, the in-situ stress of the coal seam can be reduced, the structure of the coal body can be improved, and the permeability of the coal seam can be enhanced, so as to achieve the purpose of preventing geological disasters. Before coal seam water injection, it is necessary to drill holes in the coal wall first. The quality of the drilling affects the quality of coal seam water injection. When drilling holes in the coal seam for water injection, too fast drilling speed will cause the coal body to be crushed rapidly, forming a large amount of mixture of coal slag and water, blocking the pores and fissures in the drill hole, and affecting the effect of coal seam water injection. Therefore, it is necessary to find a new type of drilling equipment and method to obtain better-quality coal seam drill holes. Summary of the Invention

[0003] In order to solve the problem of residual coal slag during drilling and simultaneously achieve functions such as accurate positioning of the drilling position and change of the drilling direction, the present invention provides an integrated drilling and cleaning coal seam drilling device and a usage method thereof.

[0004] The present invention adopts the following technical solutions: An integrated drilling and cleaning coal seam drilling device, comprising:

[0005] A rotating support frame;

[0006] A drilling assembly, the drilling assembly is installed on the rotating support frame, and the drilling assembly includes:

[0007] A multi-hole drill bit;

[0008] A cleaning device, 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 drills holes and injects water under the drive of the rotating device at the middle connection part with the cleaning device;

[0009] A support device, the support device is fixed to the rotating support frame, and the front end of the support device is connected to the cleaning device through a second rotating device;

[0010] A water injection and return device, the water injection and return device is respectively communicated with the inside of the cleaning device and the multi-hole drill bit, and the water injection and return device can extend as the multi-hole drill bit drills;

[0011] A transmission device, the transmission device drives the water injection and return device to move forward.

[0012] In some embodiments, the rotating support frame includes a rotating block, one end of a guard plate is hinged to the rotating block, the middle of the guard plate is hinged to one end of a telescopic rod, the other end of the telescopic rod is hinged to a moving groove, and the drilling assembly is installed on the moving groove and can slide along the moving groove; an angle adjuster is installed on the rotating block.

[0013] In some embodiments, water injection holes are provided on the surface of the porous drill bit, a water storage device is provided inside the porous drill bit, the water storage device is communicated with the water injection holes, and the water storage device is communicated with a water source through a water injection and return device.

[0014] 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 outside the groove, the retractable baffle is fixed to one end of a traction rod, and the retractable baffle is retracted by the traction rod controlled by a retractor;

[0015] A drilling motor is provided inside the support device, there are four infrared emitters on the drilling motor, the drilling motor is connected to the infrared emitters through wires, and the infrared rays emitted by the infrared emitters are projected onto the coal wall to clarify the drilling position;

[0016] The drilling motor is connected to a transmission device through a wire, the first rotating device and the second rotating device are connected to the drilling motor through wires, and the drilling motor supplies power to the first rotating device and the second rotating device;

[0017] A waste liquid pipe, the waste liquid pipe is communicated with the water injection and return device;

[0018] The front and rear ends of the support device clamp the water injection and return device through a fixator.

[0019] In some embodiments, the cleaning device includes a dust suction pipe, a propeller and a crusher are provided inside the dust suction pipe, the propeller is connected to the drilling motor through a wire, the drilling motor supplies power to the motor in the propeller, and the rotation is realized by the drive of a gear; the crusher is connected to the drilling motor through a wire.

[0020] In some embodiments, the drilling motor is controlled by a motor controller, the motor controller 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.

[0021] In some embodiments, the water injection and return device includes:

[0022] A return pipe, the return pipe is installed on the support device, the front end of the return pipe is connected to the cleaning device, and the rear end of the return pipe is communicated with the waste liquid pipe;

[0023] A support water injection rod, 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 communicated with the porous drill bit, the rear end of the support water injection rod is communicated with a water source, and the support water injection rod injects water into the porous drill bit;

[0024] The return pipe and the supporting water injection rod are driven forward by a transmission device.

[0025] In some embodiments, a plurality of holes are symmetrically arranged on both sides of the return pipe, and a shrinkage cover that is exactly the same size as the hole opening is provided at the orifice of each hole;

[0026] The hole at the front end of the return pipe is communicated with a groove provided with a high-density sponge through a connecting pipe, and a first protruding pipe is arranged in the connecting pipe, and the first protruding pipe is installed on a first protruding pipe spring;

[0027] The hole at the rear end of the return pipe is communicated with a waste liquid pipe, and a second protruding pipe is arranged in the waste liquid pipe, and the second protruding pipe is installed on a second protruding pipe spring.

[0028] In some embodiments, the shrinkage cover includes a shielding piece and a spring, wherein the shrinkage cover at the rear end of the return pipe is used to be coupled with the second protruding pipe spring on the waste liquid pipe, and the shrinkage cover at the front end of the return pipe is used to be coupled with the first protruding pipe;

[0029] During the advancement of the water injection and return device, when not coupled, the first protruding pipe and the second protruding pipe are compressed, the shrinkage cover remains in its original state, and the water injection and return device advances forward;

[0030] After coupling, the first protruding pipe spring and the second protruding pipe spring for installing the first protruding pipe and the second protruding pipe are harder than the spring for installing the shielding piece. The first protruding pipe and the second protruding pipe push open the shielding piece, and the returned water flows into the return pipe and then flows from the return pipe into the waste liquid pipe.

[0031] A method for using an integrated coal seam borehole drilling and cleaning device includes:

[0032] Step A: Before starting drilling, rotate the support frame to adjust to a suitable angle and telescopic length;

[0033] Step B: Control the operation of the entire drilling assembly, and the entire device starts to enter the working state, and the position where drilling is required can be accurately positioned;

[0034] Step C: Adjust the working intensity of the multi-hole drill bit and drill the drilling assembly into the coal wall;

[0035] Step D: When 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 starts to expand to block the gaps on the inner wall of the borehole; then loosen the fixator, connect a new section of the water injection and return device to the previous water injection and return device. After connection, tighten the fixator, and the water injection and return device advances forward by gear transmission;

[0036] 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.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 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.

[0039] 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.

[0040] 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

[0041] 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;

[0042] Figure 2 is a schematic diagram of a rotating support frame;

[0043] Figure 3 is a schematic diagram of a rotating block;

[0044] Figure 4 is a schematic diagram of a mobile tank;

[0045] Figure 5 is a schematic diagram of a drilling assembly;

[0046] Figure 6 is a schematic diagram of a multi-hole drill bit and its cross-section;

[0047] Figure 7 is a schematic diagram of a cleaning device;

[0048] Figure 8 is a schematic diagram of the supporting device;

[0049] Figure 9 is a schematic diagram of the motor controller;

[0050] Figure 10 is a schematic diagram of the water injection hole;

[0051] Figure 11 is a schematic diagram of the coupling of the protruding tube and the compression cover;

[0052] Figure 12 A schematic diagram of the operation of the drilling device;

[0053] Figure 13 Schematic diagrams of three modes of the drilling device;

[0054] Figure 14 Schematic diagram of the transmission device;

[0055] Figure 15 Schematic diagram of the first rotating device;

[0056] Figure 16 Schematic diagram of the second rotating device;

[0057] The reference numerals in the figure are: 1 - rotating support frame, 11 - rotating block, 12 - guard plate, 13 - telescopic rod, 14 - moving groove, 111 - angle adjuster, 1111 - angle control button, 1112 - angle display screen, 2 - drilling assembly, 21 - multi - hole drill bit, 211 - water injection hole, 212 - water storage tank, 22 - cleaning device, 23 - support device, 24 - motor controller, 25 - water injection and return device, 221 - dust suction pipe, 222 - propeller, 223 - crusher, 231 - retractable baffle, 232 - towing rod, 233 - retractor, 234 - drilling motor, 235 - fixator, 236 - waste liquid pipe, 237 - infrared emitter, 238 - high - density sponge, 239 - connecting pipe, 2391 - first protruding pipe, 2392 - waterproof pad, 2393 - first protruding pipe spring, 2361 - second protruding pipe, 2362 - second protruding pipe spring, 241 - display screen, 242 - control button, 251 - support water injection rod, 252 - retractable cover, 253 - return pipe, 2521 - shielding piece, 26 - first rotating device, 261 - rotating motor, 262 - slow - speed gear, 263 - medium - speed gear, 264 - high - speed gear, 265 - rotating housing, 266 - fixed housing, 267 - gear shift lever, 27 - second rotating device, 271 - fixed gear lever, 272 - buckle, 28 - transmission device, 281 - knob, 282 - patch, 283 - puller. Detailed implementation manners

[0058] To make the objectives, 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 some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] As Figure 1 shown, an integrated drilling and cleaning coal seam drilling device includes:

[0060] A rotating support frame 1;

[0061] A drilling assembly 2, the drilling assembly 2 is installed on a rotating support frame 1, and the drilling assembly 2 includes:

[0062] A multi-hole drill bit 21;

[0063] A cleaning device 22, the cleaning device 22 is connected to the tail end of the multi-hole drill bit 21 through a first rotating device 26, and the multi-hole drill bit 21 drills and injects water under the drive of the rotating device at the middle connection part with the cleaning device 22;

[0064] A support device 23, the support device 23 is fixed to the rotating support frame 1, and the front end of the support device 23 is connected to the cleaning device 22 through a second rotating device 27;

[0065] A water injection and return device 25, the water injection and return device 25 is respectively communicated with the inside of the cleaning device 22 and the multi-hole drill bit 21, and the water injection and return device 25 can extend as the multi-hole drill bit 21 drills;

[0066] A transmission device 28, the transmission device 28 drives the water injection and return device 25 to move forward.

[0067] As Figure 2 shown, the rotating support frame 1 includes a rotating block 11, one end of a guard plate 12 is hinged on the rotating block 11, the middle part 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 installed on the moving groove 14 and can slide along the moving groove 14; wherein an angle adjuster 111 is installed 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. There is an angle display screen 1112 and angle control buttons 1111 on the angle adjuster 111 in four rows and two columns. The left column displays the information of the currently controlled device, and the right side displays the parameters that need to be adjusted. From top to bottom, it respectively displays 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 groove 14, and the telescopic length of the telescopic rod 13.

[0068] As Figure 6 shown, water injection holes 211 are arranged on the surface of the multi-hole drill bit 21, a water storage device 212 is arranged inside the multi-hole drill bit 21, the water storage device 212 is communicated with the water injection holes 211, and the water storage device 212 is communicated with a water source through the water injection and return device 25.

[0069] As Figure 8As shown, a groove is provided on the outer side of the front end of the support device 23. A high-density sponge 238 is arranged in the groove, and 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 contracted by the traction rod 232 controlled by the retractor 233;

[0070] A drilling motor 234 is arranged inside 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 clarify the drilling position;

[0071] The drilling motor 234 is connected to the transmission device 28 through wires. The first rotating device 26 and the second rotating device 27 are connected to the drilling motor 234 through wires, and the drilling motor 234 supplies power to the first rotating device 26 and the second rotating device 27;

[0072] A waste liquid pipe 236, and the waste liquid pipe 236 is communicated with the water injection and return device 25;

[0073] The front and rear ends of the support device 23 clamp the water injection and return device 25 through the fixator 235.

[0074] As Figure 7 shown, the cleaning device 22 includes a dust suction pipe 221. A propeller 222 and a crusher 223 are arranged inside the dust suction pipe 221. The propeller 222 is connected to the drilling motor 234 through wires. The drilling motor 234 supplies power to the motor in the propeller 222 and realizes rotation driven by gears; the crusher 223 is connected to the drilling motor 234 through wires.

[0075] As Figure 9 shown, the drilling motor 234 is controlled by the motor controller 24. The motor controller 24 includes a display screen 241 and control buttons 242. The display screen 241 is used to display the current state of the drilling assembly 2, and the control buttons 242 are used to control the operation of the drilling assembly 2.

[0076] As Figure 10 、 11 shown, the water injection and return device 25 includes:

[0077] A return pipe 253, and the return pipe 253 is installed on the support device 23. The front end of the return pipe 253 is connected to the cleaning device 22, and the rear end of the return pipe 253 is communicated with the waste liquid pipe 236;

[0078] A support water injection rod 251, and 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 communicated with the multi-hole drill bit 21. The rear end of the support water injection rod 251 is communicated with the water source, and the support water injection rod 251 injects water into the multi-hole drill bit 21;

[0079] The return pipe 253 and the support water injection rod 251 are driven forward by the transmission device 28.

[0080] A plurality of holes are symmetrically arranged on both sides of the return pipe 253, and a shrinkage cover 252 that is exactly the same size as the hole opening is arranged at the orifice of each hole;

[0081] The hole at the front end of the return pipe 253 is communicated with the groove provided with the high-density sponge 238 through the connecting pipe 239. A first protruding pipe 2391 is arranged in the connecting pipe 239, and the first protruding pipe 2391 is installed on the first protruding pipe spring 2393;

[0082] The hole at the rear end of the return pipe 253 is communicated 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 installed on the second protruding pipe spring 2362.

[0083] The shrinkage cover 252 includes a shielding piece 2521 and a spring. A spring installation member is arranged in the return pipe 253, and the end of the spring is fixed on the spring installation member in the return pipe 253. Among them, the shrinkage cover 252 at the rear end of the return pipe 253 is used to be coupled with the second protruding pipe spring 2362 on the waste liquid pipe 236, and the shrinkage cover 252 at the front end of the return pipe 253 is used to be coupled with the first protruding pipe 2391;

[0084] During the advancement of the water injection and return device 25, when not coupled, the first protruding pipe 2391 and the second protruding pipe 2361 are compressed, the shrinkage cover 252 maintains its original state, and the water injection and return device 25 advances forward;

[0085] After coupling, the first protruding pipe spring 2393 and the second protruding pipe spring 2362 for installing the first protruding pipe 2391 and the second protruding pipe 2361 are harder than the spring for installing the shielding piece 2521. The first protruding pipe 2391 and the second protruding pipe 2361 push open the shielding piece 2521, and the returned water flows from the high-density sponge 238 into the return pipe 253 and flows from the return pipe 253 into the waste liquid pipe 236.

[0086] A waterproof pad 2392 is added to the end of the connecting pipe 239 for leak prevention.

[0087] As Figure 14 shown, the drilling motor 234 is connected to the transmission device 28 through a wire. Under the control of the drilling motor 234, the two-side knobs 281 rotate, driving the puller 283 to move forward and backward. When the puller 283 moves forward, the patch 282 closely adheres 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 separates from the water injection and return device 25, preparing to pull the water injection and return device 25 forward next time.

[0088] AsFigure 15 As shown in the figure, the drilling motor 234 is connected to the first rotating device 26 through the water injection and return device 25. The wire passes through the fixed housing 266 to connect to the rotating motor 261. A gear shift lever 267 is provided on the output shaft of the rotating motor 261. A slow-speed gear 262, a medium-speed gear 263, and a high-speed gear 264 are provided on the gear shift lever 267. The gear shift lever 267 adjusts the slow-speed gear 262, the medium-speed gear 263, and the high-speed gear 264 to mesh with the gears of the rotating housing 265 respectively, so that the rotating housing 265 rotates. The rotating housing 265 is connected to the multi-hole drill bit 21, so that the rotating housing drives the multi-hole drill bit 21 to rotate together.

[0089] As Figure 16 shown in the figure, the structures of the first rotating device 26 and the second rotating device 27 are basically the same. The difference is that the first rotating device 26 can control the movement of three gears through the gear shift lever 267 to achieve the purpose of adjusting the rotation speed. The second rotating device 27 only has a slow-speed gear on the fixed gear lever 271. The dust suction pipe 221 is connected to the second rotating device 27 through a 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.

[0090] A method for using an integrated drilling and cleaning coal seam drilling device includes:

[0091] Step A: Before starting drilling, rotate the support frame 1 to adjust to an appropriate angle and telescopic length;

[0092] Step B: Control the operation of the entire drilling assembly 2, and the entire device starts to enter the working state and can accurately locate the position where drilling is required;

[0093] Step C: Adjust the working intensity of the multi-hole drill bit 21 and drill the drilling assembly 2 into the coal wall;

[0094] Step D: When the support device 23 enters the drill hole, press the baffle switch. At this time, 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 starts to expand to block the gaps in the inner wall of the drill hole; then loosen the fixator 235, connect a new section of the water injection and return device 25 to the previous water injection and return device 25. After connection, tighten the fixator 235, and the water injection and return device 25 advances forward by gear transmission;

[0095] 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.

[0096] 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 a 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); The cleaning device (22) comprises a dust suction pipe (221), a propeller (222) and a crusher (223) are arranged in the dust suction pipe (221), the propeller (222) and the drilling motor (234) are connected via a wire, the drilling motor (234) supplies power to the motor in the propeller (222), and the motor is driven by the gear to rotate; the crusher (223) and the drilling motor (234) are connected via a wire; 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; 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); 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), wherein the waste liquid pipe (236) is 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 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).

6. The drilling and cleaning integrated coal seam drilling device according to claim 5, 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).

7. The drilling and cleaning integrated coal seam drilling device according to claim 6, 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).

8. A method for using the integrated drilling and cleaning coal seam drilling device according to claim 7, characterized in that: include: Step A: Before drilling, rotate the support frame (1) to adjust it 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 accurately locates 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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