An integrated drilling device for underground coal seam gas extraction in coal mines

Abstract

This invention discloses an integrated drilling device for underground coal seam gas extraction, relating to the field of underground coal mine gas disaster prevention technology. It includes a base plate, a mud-blocking ring fixedly connected to the center of the base plate, hinge seats fixedly connected to the four sides of the base plate, side plates rotatably connected to the hinge seats, mounting holes on the side plates, a clamping plate fixedly connected to the center of the top surface of the side plates, and support rods fixedly connected to the four corners of the base plate. The top ends of the support rods are fixedly connected to docking seats, and one end of the docking seats is fixedly connected to a fixing ring. This invention has a reasonable structure. Drilling holes in the side plates using the docking assembly facilitates the overall fixing of the base plate to the ground. Then, the drilling assembly and positioning assembly work together to facilitate direct docking of the gas pipeline with the square head after drilling, thereby improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of underground gas disaster prevention and control technology in coal mines, and in particular to an integrated device for underground gas extraction boreholes in coal seams. Background Technology

[0002] In recent years, with the development of the social economy, the demand for coal resources has continued to rise, and many mines have been mining deeper and deeper. This has not only directly led to the transformation of shallow, low-gas mines into deep, high-gas mines, but will also further increase the gas content and concentration in existing high-gas mines, making mine gas disasters more severe.

[0003] Currently, when drilling holes to extract gas from the ground, most operations involve manual drilling using a handheld drilling machine. Once the gas layer is reached, the drilled pipe is removed and inserted into the gas inlet pipe to collect the gas. This manual operation increases the workload, requires a large number of people to work together, and the efficiency of drilling to extract gas is very low. Summary of the Invention

[0004] The purpose of this application is to provide an integrated drilling device for underground coal seam gas extraction, which realizes the drilling of side plates through docking components, making it easy to fix the bottom plate as a whole on the ground. Then, by using the drilling components and positioning components together, the gas pipeline can be directly docked with the square head after drilling is completed, thereby improving work efficiency.

[0005] To achieve the above objectives, this application provides the following technical solution: an integrated drilling device for gas extraction in a coal seam underground mine, comprising a base plate, a mud-blocking ring fixedly connected to the center of the base plate, hinge seats fixedly connected to the four sides of the base plate, side plates rotatably connected to the hinge seats, mounting holes provided on the side plates, a clamping plate fixedly connected to the center of the top surface of the side plates, support rods fixedly connected to the four corners of the base plate, the top ends of the support rods fixedly connected to docking seats, one end of the docking seats fixedly connected to a fixing ring, a pair of side seats symmetrically fixedly connected to the outer surface of the fixing ring, a sliding rod fixedly connected to the pair of side seats, and a baffle plate fixedly connected to the bottom end of the sliding rod; further comprising a docking assembly, a drilling assembly, and a positioning assembly, the docking assembly being disposed on the base plate for storing the side plates, the drilling assembly being disposed on the fixing ring for drilling, and the positioning assembly being disposed on the fixing ring for use in conjunction with the drilling assembly.

[0006] Preferably, the docking assembly includes a rotating ring rotatably connected to the base plate, a fixed seat fixedly connected to the outer surface of the rotating ring, a pull rod fixedly connected to the fixed seat, the rotating ring having a plurality of limiting grooves, a sliding column slidably connected inside the limiting grooves, and the bottom end of the sliding column fixedly connected to the base plate.

[0007] Preferably, the rotating ring has several sets of guide grooves, and a shaft pin is slidably connected inside the guide groove. The top end of the shaft pin is fixedly connected to the adjusting block. The adjusting block has a slot and is slidably connected to a pair of limiting rods. One end of the pair of limiting rods is fixedly connected to the shaft seat, and the bottom end of the shaft seat is fixedly connected to the base plate.

[0008] Preferably, a collar is fixedly connected to the other end of the pair of limiting rods, and a first spring is sleeved on the collar. The two ends of the first spring are fixedly connected to the inside of the adjusting block and one side of the collar, respectively.

[0009] Preferably, the punching assembly includes a pair of support plates fixedly connected to the outer surface of the fixing ring. A handle is fixedly connected to the top surface of the pair of support plates, and a toothed plate is fixedly connected to the bottom end of the pair of support plates. A limiting plate is fixedly connected to the outer side of the toothed plate. Several sets of circular holes are opened on the limiting plate. Gears are meshed on the toothed plate, and the two ends of the gears are rotatably connected to the first positioning seat.

[0010] Preferably, one end of the first positioning seat is fixedly connected to the frame, and the two sides of the frame are fixedly connected to the second positioning seats. A pin is fixedly connected to the second positioning seat, one end of the pin is fixedly connected to the mounting block, and a pair of pulleys are rotatably connected to the mounting block. The pair of pulleys are slidably connected to the support rod.

[0011] Preferably, a liner is fixedly connected to the inner wall of the frame, a rotating rod is rotatably connected to the middle of the liner, a square head is fixedly connected to the top of the rotating rod, a threaded post is fixedly connected to the bottom of the rotating rod, a channel is opened inside the rotating rod, a perforated tube is threadedly connected to the threaded post, an external thread is fixedly connected to the outer surface of the top of the perforated tube, and replacement grooves are symmetrically opened on the surface of the perforated tube.

[0012] Preferably, the positioning component includes a pair of wall panels fixedly installed on the side of the frame, with a horizontal plate fixedly connected to the other end of each wall panel. A rod is movably inserted into the middle of the horizontal plate, with one end of the rod inserted into one of the circular holes. A retaining ring is fixedly installed on the rod, and a second spring is sleeved on the rod. The two ends of the second spring are fixedly connected to one side of the retaining ring and one side of the horizontal plate, respectively.

[0013] Preferably, the other end of the insertion rod is fixedly connected to a connector, the outer surface of the connector is fixedly connected to a locking rod, a positioning plate is fixedly connected to the outer side of the horizontal plate near the connector, the positioning plate has a through groove in the longitudinal position, and a number of arc-shaped grooves in the transverse position of the positioning plate, the through groove and the arc-shaped groove are interconnected, and one end of the locking rod is inserted into the through groove.

[0014] Preferably, a slide block is slidably connected to the support rod, the slide block is fixedly connected to the movable ring, and a bolt is threaded onto the slide block. One end of the bolt is attached to the surface of the support rod. Several sets of sockets are fixedly connected to the top surface of the movable ring. An adjusting rod is movably inserted into the socket. One end of the adjusting rod is fixedly connected to a limit ring, and the other end of the adjusting rod is fixedly connected to a pressure plate. A support block is fixedly connected to the middle of the pressure plate, and the support block is engaged inside the replacement groove.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The present invention has a reasonable structure. When the side plate is stored, the side plate is rotated. A clamping plate is fixedly connected to the side plate. The rotation of the side plate moves the clamping plate to the inclined surface of the adjusting block. Then, the adjusting block is pressed, so that the clamping plate is locked inside the slot. When the side plate is opened, the pull rod is pulled, which drives the rotating ring to rotate through the fixed seat. The limiting groove on the rotating ring slides on the sliding column, which increases the stability of the rotating ring. The rotation of the rotating ring causes the guide groove to pull the shaft pin on the adjusting block to move, so that the adjusting block can be retracted and the clamping plate can be disengaged from the slot, thus facilitating the opening of the side plate.

[0017] 2. In this invention, during the drilling operation, the output end of the drilling machine is connected to the square head. Then, the rotating rod on the square head is rotated by the operation of the drilling machine. A threaded column is fixedly connected to the bottom end of the rotating rod, and a drilling tube is threadedly connected to the threaded column. The drilling tube can be lengthened according to the drilling needs. When the bottom of the drilling tube is drilled into the gas layer, the gas enters the interior of the drilling tube. Then, the drilling machine on the square head is removed, and the gas pipe is threadedly connected to the square head. Then, the gas inside the drilling tube enters the channel for extraction.

[0018] 3. In this invention, when the frame moves, the connector is pulled. The pulling of the connector causes the retaining ring on the insertion rod to compress the second spring, thereby facilitating one end of the insertion rod to disengage from the inside of the round hole. As the connector moves, the locking rod slides inside the through groove. Then, the connector is rotated, and the locking rod is locked inside one of the arc-shaped grooves, thereby facilitating the fixing of the insertion rod position and allowing the frame to move freely up and down. When the perforated tube is lengthened, the movable ring is moved to the side of the perforated tube, and then the bolt is rotated to fix the position of the movable ring. The adjusting rod is pushed to facilitate the movement of the support block on the pressure plate into the replacement groove to fix the perforated tube, thereby facilitating the replacement of the perforated tube or the lengthening of the pipe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the device body;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the fixed ring;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the base plate;

[0023] Figure 4 This is a schematic diagram of a rotating three-dimensional structure;

[0024] Figure 5 This is a schematic diagram of the three-dimensional frame structure;

[0025] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating rod;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the movable ring;

[0027] Figure 8 for Figure 3 Enlarged structural diagram at point A in the middle;

[0028] Figure 9 for Figure 5 Enlarged structural diagram at point B.

[0029] In the diagram: 1. Base plate; 101. Mudguard ring; 102. Hinge seat; 103. Side plate; 104. Mounting hole; 105. Clamping plate; 106. Support rod; 107. Connecting seat; 108. Fixing ring; 109. Side seat; 110. Sliding rod; 112. Baffle plate; 2. Rotary ring; 201. Fixing seat; 202. Pull rod; 203. Limiting groove; 204. Sliding column; 205. Guide groove; 206. Shaft pin; 207. Adjusting block; 208. Clamping groove; 209. Limiting rod; 210. Shaft seat; 211. Collar; 212. First spring; 3. Support plate; 301. Handle; 302. Gear plate; 303. Limiting plate; 304. Round hole; 305. Gear; 306. First 307. Positioning seat; 308. Frame; 309. Second positioning seat; 310. Insert post; 311. Mounting block; 312. Pulley; 313. Liner plate; 314. Rotating rod; 315. Square head; 316. Threaded post; 317. Channel; 318. Perforated tube; 319. External thread; 4. Replacement groove; 4. Wall panel; 401. Horizontal plate; 402. Insert rod; 403. Retaining ring; 404. Second spring; 405. Connecting joint; 406. Locking rod; 407. Positioning plate; 408. Through groove; 409. Arc groove; 5. Slide seat; 501. Movable ring; 502. Bolt; 503. Socket; 504. Adjusting rod; 505. Limiting ring; 506. Pressure plate; 507. Support block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example: Reference Figure 1 - Figure 9The diagram shows an integrated drilling device for underground coal seam gas extraction, comprising a base plate 1, a mud-blocking ring 101 fixedly connected to the center of the base plate 1, hinge seats 102 fixedly connected to the four sides of the base plate 1, side plates 103 rotatably connected to the hinge seats 102, mounting holes 104 formed on the side plates 103, a clamping plate 105 fixedly connected to the center of the top surface of the side plates 103, and support rods 106 fixedly connected to the four corners of the base plate 1. The top ends of the support rods 106 are fixedly connected to docking seats 107. One end of 7 is fixedly connected to the fixing ring 108. A pair of side seats 109 are symmetrically fixedly connected to the outer surface of the fixing ring 108. A slide rod 110 is fixedly connected to the pair of side seats 109. A baffle 112 is fixedly connected to the bottom end of the slide rod 110. It also includes a docking assembly, a drilling assembly and a positioning assembly. The docking assembly is set on the base plate 1 for storing the side plate 103. The drilling assembly is set on the fixing ring 108 for drilling. The positioning assembly is set on the fixing ring 108 for use in conjunction with the drilling assembly.

[0032] Specifically, it should be noted that the output end of the punching machine is connected to the square head 314. The operation of the punching machine causes the rotating rod 313 on the square head 314 to rotate. The rotation of the rotating rod 313 drives the punching tube 317 to rotate and perform punching work. When it is necessary to extract underground gas, the gas pipeline is connected to the square head 314. Then the underground gas enters the interior of the punching tube 317 and is extracted through the channel 316.

[0033] In one embodiment of this invention, the docking assembly includes a rotating ring 2 rotatably connected to a base plate 1. A fixing seat 201 is fixedly connected to the outer surface of the rotating ring 2, and a pull rod 202 is fixedly connected to the fixing seat 201. The rotating ring 2 has several sets of limiting grooves 203, and a sliding column 204 is slidably connected inside the limiting grooves 203. The bottom end of the sliding column 204 is fixedly connected to the base plate 1. The rotating ring 2 has several sets of guide grooves 205, and a shaft pin 206 is slidably connected inside the guide grooves 205. The top end is fixedly connected to the adjusting block 207. The adjusting block 207 has a slot 208. The adjusting block 207 is slidably connected to a pair of limiting rods 209. One end of the pair of limiting rods 209 is fixedly connected to the bearing seat 210. The bottom end of the bearing seat 210 is fixedly connected to the base plate 1. The other end of the pair of limiting rods 209 is fixedly connected to a collar 211. A first spring 212 is sleeved on the collar 211. The two ends of the first spring 212 are fixedly connected to the inside of the adjusting block 207 and one side of the collar 211, respectively.

[0034] Specifically, when storing the side plate 103, the side plate 103 is rotated. A retaining plate 105 is fixedly connected to the side plate 103. The rotation of the side plate 103 causes the retaining plate 105 to move to the inclined surface of the adjusting block 207. Then, the adjusting block 207 is pressed, so that the retaining plate 105 is locked inside the retaining groove 208. When opening the side plate 103, the pull rod 202 is pulled, which drives the rotating ring 2 to rotate through the fixed seat 201. The limiting groove 203 on the rotating ring 2 slides on the sliding column 204, increasing the stability of the rotating ring 2. The rotation of the rotating ring 2 causes the guide groove 205 to pull the shaft pin 206 on the adjusting block 207 to move, thereby facilitating the retraction of the adjusting block 207 and causing the retaining plate 105 to disengage from the retaining groove 208, thus facilitating the opening of the side plate 103.

[0035] In one embodiment of this invention, the punching assembly includes a pair of support plates 3 fixedly connected to the outer surface of the fixing ring 108. A handle 301 is fixedly connected to the top surface of the pair of support plates 3, and a toothed plate 302 is fixedly connected to the bottom end of the pair of support plates 3. A limiting plate 303 is fixedly connected to the outer side of the toothed plate 302. The limiting plate 303 has several sets of circular holes 304. A gear 305 meshes on the toothed plate 302. Both ends of the gear 305 are rotatably connected to a first positioning seat 306. One end of the first positioning seat 306 is fixedly connected to a frame 307. Second positioning seats 308 are fixedly connected to both sides of the frame 307. Insert pins 309 are fixedly connected to the second positioning seats 308. One end of the insert 309 is fixedly connected to the mounting block 310. A pair of pulleys 311 are rotatably connected to the mounting block 310. The pair of pulleys 311 are slidably connected to the support rod 106. A liner 312 is fixedly connected to the inner wall of the frame 307. A rotating rod 313 is rotatably connected to the middle of the liner 312. A square head 314 is fixedly connected to the top of the rotating rod 313. A threaded post 315 is fixedly connected to the bottom of the rotating rod 313. A channel 316 is opened inside the rotating rod 313. A perforated tube 317 is threadedly connected to the threaded post 315. An external thread 318 is fixedly connected to the outer surface of the top of the perforated tube 317. A replacement groove 319 is symmetrically opened on the surface of the perforated tube 317.

[0036] Specifically, during the drilling operation, the output end of the drilling machine is connected to the square head 314. Then, the drilling machine rotates the rotating rod 313 on the square head 314. A threaded post 315 is fixedly connected to the bottom end of the rotating rod 313, and a drilling tube 317 is threadedly connected to the threaded post 315. The drilling tube 317 can be lengthened according to the drilling needs. When the bottom of the drilling tube 317 is drilled into the gas layer, the gas enters the interior of the drilling tube 317. Then, the drilling machine on the square head 314 is removed, and a gas pipe is threadedly connected to the square head 314. The gas inside the drilling tube 317 then enters the interior of the channel 316 for extraction.

[0037] In one embodiment of this invention, the positioning assembly includes a pair of wall panels 4 fixedly installed on the side of the frame 307. A horizontal plate 401 is fixedly connected to the other end of each wall panel 4. A rod 402 is movably inserted into the middle of the horizontal plate 401. One end of the rod 402 is inserted into one of the circular holes 304. A retaining ring 403 is fixedly installed on the rod 402. A second spring 404 is sleeved on the rod 402. Both ends of the second spring 404 are fixedly connected to one side of the retaining ring 403 and one side of the horizontal plate 401, respectively. A connector 405 is fixedly connected to the other end of the rod 402. A locking rod 406 is fixedly connected to the outer surface of the connector 405. A positioning plate 407 is fixedly connected to the outer side of the horizontal plate 401 near the connector 405. The positioning plate 407 has a longitudinally oriented opening. The through groove 408 and the positioning plate 407 have several sets of arc-shaped grooves 409 in their transverse positions. The through groove 408 and the arc-shaped grooves 409 are interconnected. One end of the locking rod 406 is inserted into the through groove 408. A slide block 5 is slidably connected to the support rod 106. The slide block 5 is fixedly connected to the movable ring 501. A bolt 502 is threaded onto the slide block 5. One end of the bolt 502 is attached to the surface of the support rod 106. Several sets of sockets 503 are fixedly connected to the top surface of the movable ring 501. An adjusting rod 504 is movably inserted into the socket 503. One end of the adjusting rod 504 is fixedly connected to a limit ring 505. The other end of the adjusting rod 504 is fixedly connected to a pressure plate 506. A support block 507 is fixedly connected to the middle position of the pressure plate 506. The support block 507 is locked inside the replacement groove 319.

[0038] Specifically, when the frame 307 moves, it pulls the connector 405. The pulling of the connector 405 causes the retaining ring 403 on the insertion rod 402 to compress the second spring 404, thus facilitating one end of the insertion rod 402 to disengage from the inside of the round hole 304. As the connector 405 moves, the locking rod 406 slides inside the through groove 408. Then, the connector 405 is rotated, causing the locking rod 406 to be locked inside one of the arc-shaped grooves 409, thus facilitating the fixation of the insertion rod 402 and allowing the frame 307 to move freely up and down. When the perforated tube 317 is lengthened, the movable ring 501 is moved to the side of the perforated tube 317, and then the bolt 502 is rotated to fix the position of the movable ring 501. The adjusting rod 504 is pushed to facilitate the movement of the support block 507 on the pressure plate 506 into the replacement groove 319 to fix the perforated tube 317, thus facilitating the replacement of the perforated tube 317 or the lengthening of the pipe.

[0039] The working principle of this invention is as follows: When the side plate 103 is stored, it is rotated. A retaining plate 105 is fixedly connected to the side plate 103. The rotation of the side plate 103 causes the retaining plate 105 to move to the inclined surface of the adjusting block 207. Then, the adjusting block 207 is pressed, so that the retaining plate 105 is locked inside the retaining groove 208. When the side plate 103 is opened, the pull rod 202 is pulled, which drives the rotating ring 2 to rotate through the fixed seat 201. The limiting groove 203 on the rotating ring 2 slides on the sliding column 204, increasing the stability of the rotating ring 2. The rotation of the rotating ring 2 causes the guide groove 205 to pull the shaft pin 206 on the adjusting block 207 to move, thereby facilitating the retraction of the adjusting block 207 and causing the retaining plate 105 to disengage from the retaining groove 208, thus facilitating the opening of the side plate 103.

[0040] During the drilling operation, the output end of the drilling machine is connected to the square head 314. Then, the drilling machine is operated to rotate the rotating rod 313 on the square head 314. A threaded post 315 is fixedly connected to the bottom end of the rotating rod 313, and a drilling tube 317 is threadedly connected to the threaded post 315. The drilling tube 317 can be lengthened according to the drilling needs. When the bottom of the drilling tube 317 is drilled into the gas layer, the gas enters the interior of the drilling tube 317. Then, the drilling machine on the square head 314 is removed, and the gas pipe is threadedly connected to the square head 314. Then, the gas inside the drilling tube 317 enters the interior of the channel 316 for extraction.

[0041] When the frame 307 moves, it pulls the connector 405. The pulling of the connector 405 causes the retaining ring 403 on the insertion rod 402 to compress the second spring 404, thus facilitating one end of the insertion rod 402 to disengage from the inside of the round hole 304. As the connector 405 moves, the locking rod 406 slides inside the through groove 408. Then, the connector 405 is rotated, causing the locking rod 406 to be locked inside one of the arc-shaped grooves 409, thus facilitating the fixation of the insertion rod 402 and allowing the frame 307 to move freely up and down. When the perforated tube 317 is lengthened, the movable ring 501 is moved to the side of the perforated tube 317, and then the bolt 502 is rotated to fix the position of the movable ring 501. The adjusting rod 504 is pushed to facilitate the movement of the support block 507 on the pressure plate 506 into the replacement groove 319 to fix the perforated tube 317, thus facilitating the replacement of the perforated tube 317 or the lengthening of the pipe.

[0042] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated drilling device for underground gas extraction in a coal seam, comprising a base plate (1), characterized in that, A mudguard ring (101) is fixedly connected to the middle of the base plate (1). A hinge seat (102) is fixedly connected to the four sides of the base plate (1). A side plate (103) is rotatably connected to the hinge seat (102). An installation hole (104) is provided on the side plate (103). A clamping plate (105) is fixedly connected to the middle of the top surface of the side plate (103). A support rod (106) is fixedly connected to the four corners of the base plate (1). The top end of the support rod (106) is fixedly connected to the docking seat (107). One end of the docking seat (107) is fixedly connected to the fixing ring (108). A pair of side seats (109) are symmetrically fixedly connected to the outer surface of the fixing ring (108). A sliding rod (110) is fixedly connected to the pair of side seats (109). A baffle plate (112) is fixedly connected to the bottom end of the sliding rod (110). It also includes a docking component, a drilling component and a positioning component. The docking component is set on the base plate (1) for storing the side plate (103). The drilling component is set on the fixing ring (108) for drilling. The positioning component is set on the fixing ring (108) for use in conjunction with the drilling component. The drilling assembly includes a pair of support plates (3) fixedly connected to the outer surface of the fixed ring (108). A handle (301) is fixedly connected to the top surface of the pair of support plates (3). A toothed plate (302) is fixedly connected to the bottom end of the pair of support plates (3). A limiting plate (303) is fixedly connected to the outer side of the toothed plate (302). Several sets of round holes (304) are opened on the limiting plate (303). A gear (305) meshes on the toothed plate (302). The two ends of the gear (305) are rotatably connected to the first positioning seat (306). One end of the first positioning seat (306) is fixedly connected to the frame (307). The two sides of the frame (307) are fixedly connected to the second positioning seat (308). A pin (309) is fixedly connected to the second positioning seat (308). One end of the pin (309) is fixedly connected to the second positioning seat (308). The end is fixedly connected to the mounting block (310), and a pair of pulleys (311) are rotatably connected to the mounting block (310). The pair of pulleys (311) are slidably connected to the support rod (106). A liner plate (312) is fixedly connected to the inner wall of the frame (307). A rotating rod (313) is rotatably connected to the middle position of the liner plate (312). A square head (314) is fixedly connected to the top of the rotating rod (313). A threaded column (315) is fixedly connected to the bottom of the rotating rod (313). A channel (316) is opened inside the rotating rod (313). A perforated tube (317) is threadedly connected to the threaded column (315). An external thread (318) is fixedly connected to the outer surface of the top of the perforated tube (317). A replacement groove (319) is symmetrically opened on the surface of the perforated tube (317).

2. The integrated drilling device for underground coal seam gas extraction according to claim 1, characterized in that: The docking assembly includes a rotating ring (2) rotatably connected to the base plate (1). A fixed seat (201) is fixedly connected to the outer surface of the rotating ring (2). A pull rod (202) is fixedly connected to the fixed seat (201). The rotating ring (2) has several sets of limiting grooves (203). A sliding column (204) is slidably connected inside the limiting groove (203). The bottom end of the sliding column (204) is fixedly connected to the base plate (1).

3. The integrated drilling device for underground coal seam gas extraction according to claim 2, characterized in that: The rotating ring (2) is provided with several sets of guide grooves (205). A shaft pin (206) is slidably connected inside the guide groove (205). The top end of the shaft pin (206) is fixedly connected to the adjusting block (207). The adjusting block (207) is provided with a slot (208). The adjusting block (207) is slidably connected to a pair of limiting rods (209). One end of the pair of limiting rods (209) is fixedly connected to the bearing seat (210). The bottom end of the bearing seat (210) is fixedly connected to the base plate (1).

4. The integrated drilling device for underground coal seam gas extraction according to claim 3, characterized in that: The other end of the pair of limiting rods (209) is fixedly connected to a collar (211), and a first spring (212) is sleeved on the collar (211). The two ends of the first spring (212) are fixedly connected to the inside of the adjusting block (207) and one side of the collar (211), respectively.

5. The integrated drilling device for underground coal seam gas extraction according to claim 1, characterized in that: The positioning assembly includes a pair of wall panels (4) fixedly installed on the side of the frame (307). A horizontal plate (401) is fixedly connected to the other end of the wall panel (4). A rod (402) is movably inserted into the middle of the horizontal plate (401). One end of the rod (402) is inserted into one of the circular holes (304). A retaining ring (403) is fixedly installed on the rod (402). A second spring (404) is sleeved on the rod (402). The two ends of the second spring (404) are fixedly connected to one side of the retaining ring (403) and one side of the horizontal plate (401), respectively.

6. The integrated drilling device for underground gas extraction in coal seams according to claim 5, characterized in that: The other end of the insertion rod (402) is fixedly connected to a connector (405). A locking rod (406) is fixedly connected to the outer surface of the connector (405). A positioning plate (407) is fixedly connected to the outer side of the horizontal plate (401) near the connector (405). A through groove (408) is opened in the longitudinal position of the positioning plate (407). Several sets of arc grooves (409) are opened in the transverse position of the positioning plate (407). The through groove (408) and the arc groove (409) are interconnected. One end of the locking rod (406) is inserted into the through groove (408).

7. The integrated drilling device for underground gas extraction in coal seams according to claim 6, characterized in that: A slide block (5) is slidably connected to the support rod (106). The slide block (5) is fixedly connected to the movable ring (501). A bolt (502) is threadedly connected to the slide block (5). One end of the bolt (502) is attached to the surface of the support rod (106). Several sets of sockets (503) are fixedly connected to the top surface of the movable ring (501). An adjusting rod (504) is movably inserted into the socket (503). A limit ring (505) is fixedly connected to one end of the adjusting rod (504). A pressure plate (506) is fixedly connected to the other end of the adjusting rod (504). A support block (507) is fixedly connected to the middle position of the pressure plate (506). The support block (507) is locked inside the replacement groove (319).

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