Low-transparency thick coal seam fault gas extraction device and use method thereof

Abstract

The application discloses a low-transparency thick coal seam fault gas extraction device, relates to the related technical field of coal mine gas extraction, and comprises a supporting assembly, a rotating assembly, a pressing-down assembly and an extraction assembly. The middle part of the supporting assembly is provided with the rotating assembly. The application also provides a use method of the low-transparency thick coal seam fault gas extraction device. The supporting assembly can be erected above a thick coal seam fault drilling hole, the clamping assembly can clamp the extraction assembly to position the extraction assembly, the pressing-down assembly can press the extraction assembly into the drilling hole to lay the extraction assembly, the extraction assembly is composed of a pipe body and a pipe head, the outer side of the pipe head is provided with a movable arc-shaped baffle, and the baffle can shield and protect the gas extraction hole when the pipe head moves in the drilling hole, so that rock blocks and coal blocks are prevented from entering the gas extraction hole and causing the gas extraction hole to be blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine gas extraction, in particular to a low-transmissivity thick coal seam fault gas extraction device and a use method thereof. BACKGROUND

[0002] Thick coal seam refers to a coal seam with a thickness of more than 3.5m in underground mining or more than 10m in open-pit mining. In China, the yield of thick coal seam accounts for about 45% of the total coal yield, and China is a country with large reserves and large mining of thick coal seams. Thick coal seam is the main coal seam for high-yield and high-efficiency mining in China, and has an advantage in resource reserves. Because of its large thickness, various mining methods can be selected. After the coal seam is fractured under the action of gravity, under the continuous action of force, the two sides of the rock mass along the fracture surface will have a significant relative displacement, which is called fault.

[0003] In the process of thick coal seam mining, gas outburst often occurs at the fault of thick coal seam, which threatens the safety of personnel in the coal mine. Gas refers to harmful gas mainly composed of methane in the mine, and sometimes refers to methane alone. Therefore, in order to eliminate the danger of gas and improve the safety of personnel in the mine, a borehole is often drilled in the coal seam, and a gas extraction pipe is placed in the borehole to extract the gas in the fault of thick coal seam. However, the gas extraction pipe will collide with the inner wall of the borehole during insertion, which causes the rock and coal in the inner wall of the borehole to enter the gas extraction pipe, which may cause the gas extraction pipe to be blocked and affect the gas extraction work. Moreover, it is laborious to directly insert the gas extraction pipe into the borehole, which is not conducive to the laying of the gas extraction pipe. Therefore, it is necessary to invent a low-transmissivity thick coal seam fault gas extraction device to solve the above problems. SUMMARY

[0004] The present application aims to provide a low-transmissivity thick coal seam fault gas extraction device and a use method thereof to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a low-transmissivity thick coal seam fault gas extraction device, comprising a support assembly, a rotating assembly arranged in the middle of the support assembly, a pressing assembly arranged above the support assembly, and an extraction assembly arranged in the middle of the rotating assembly; the top of the rotating assembly is provided with a plurality of clamping assemblies arranged in a circumferential array.

[0006] The extraction assembly comprises a pipe body and a pipe head; the bottom end of the pipe head is fixedly connected with a fixed pipe, the bottom end of the fixed pipe is fixedly connected with a conical block, a plurality of gas extraction holes arranged in an annular array are formed through the outer side wall of the fixed pipe, a one-way valve plate is hinged in the gas extraction hole, a filter screen connected with the pipe head is inserted into the inside of the fixed pipe, and a plurality of arc-shaped baffles arranged in an annular array are arranged on the outside of the fixed pipe.

[0007] Preferably, the inner side wall bottom end of the arc-shaped baffle is movably connected with the outer side wall bottom end of the fixed tube through a pin shaft, an annular block is connected with the outer side of the fixed tube in a sleeved manner, the top of the annular block is connected with the bottom of the tube head through an extension spring, the outer side wall of the annular block is connected with a plurality of movable arms arranged in an annular array through a pin shaft, one end of the movable arm is connected with the middle part of the inner side wall of the arc-shaped baffle through a pin shaft, and the top of the annular block is provided with a guide column.

[0008] Preferably, one side of the fixed plate is provided with a through hole, a sliding rod is slidably connected in the through hole, a stop block is arranged at the top of the sliding rod, the bottom of the sliding rod extends into the fixed tube through the filter screen, a sliding groove is arranged on the circumferential side wall of the end in the fixed tube, a wedge-shaped sliding block is connected with the sliding groove through a compression spring in the sliding groove, the side of the one-way valve plate close to the filter screen is provided with a locking block which is locked with the wedge-shaped sliding block, a reset spring is sleeved on the top of the sliding rod, one end of the reset spring is connected with the fixed plate, and the other end of the reset spring is connected with the stop block.

[0009] Preferably, a limiting block is arranged at the middle part of the sliding rod, a guide block is arranged on the circumferential side wall of the sliding rod below the limiting block, a half-turn spiral groove is arranged at the top of the bottom end of the half-turn spiral groove, and a vertical groove is arranged at the top of the bottom end of the half-turn spiral groove.

[0010] Preferably, the support assembly comprises an annular support plate, a circular through groove is arranged at the middle part of the annular support plate, and the bottom end of the annular support plate is fixedly connected with an annular extension frame.

[0011] Preferably, a transmission gear is fixedly connected to the bottom end of the lifting lead screw below the annular support plate, a connecting plate is fixedly connected to the top end of the positioning sliding rod and movably connected with the top end of the lifting lead screw, a drive motor is arranged on the top of the annular support plate and penetrates the annular support plate, the output shaft of the drive motor penetrates the annular support plate, and a drive gear is connected to the end of the output shaft of the drive motor penetrating the annular support plate.

[0012] Preferably, the rotating assembly includes an annular movable plate located inside the circular through groove. The lower surface of the annular movable plate is movably connected by bearings to a plurality of rollers with an "H"-shaped cross-section arranged in an annular array. The rollers are adapted to the circular through groove. An annular extension plate is provided below the annular movable plate and is movably connected to the rollers. A plurality of protruding teeth arranged in an annular array are fixedly connected to the outer side of the annular extension plate. The protruding teeth mesh with the drive gear and the transmission gear. A clamping assembly arranged in a circumferential array is provided on the top of the annular movable plate.

[0013] Preferably, the clamping assembly includes a set of support arms hinged to the top of the annular movable plate, and each set of support arms has two arms; one end of the inner sidewall of each support arm is movably connected to a movable frame via a pin, and both ends of the inner sidewall of the movable frame are fixedly connected to arc-shaped connecting rods, and both ends of the arc-shaped connecting rods are sleeved with positioning wheels; the middle of each arc-shaped connecting rod is movably connected to an electric telescopic rod via a pin, and the ends of the two electric telescopic rods away from the arc-shaped connecting rods are hinged to the annular movable plate.

[0014] Preferably, the pressing assembly includes an arc-shaped movable seat, a screw sleeve that is threadedly connected to the lifting screw is embedded in the middle of the movable seat, positioning sleeves that are sleeved with positioning slide rods are embedded at both ends of the movable seat, a pressure plate is fixedly connected to the inner side of the movable seat, and a rotating pressure ring is provided at the bottom of the pressure plate.

[0015] Preferably, multiple tube bodies are provided and connected end to end; a sealing gasket is provided between two adjacent tube bodies; the top of the inner sidewall of each tube body is provided with an internal thread; the outer side of the bottom end of each tube body is provided with an external thread that matches the internal thread; a positioning bolt is inserted into a threaded hole at the top of the outer sidewall of each tube body; a positioning threaded hole that matches the positioning bolt is provided at the bottom of the outer sidewall of each tube body; the inner wall at the top of the inner sidewall of each tube head is provided with a connecting thread that matches the external thread; a threaded hole is provided on the peripheral sidewall of each tube head; a fixing bolt that matches the threaded hole is inserted into the threaded hole.

[0016] This invention also provides a method for using a gas extraction device for faults in low-permeability, thick coal seams, specifically including the following steps:

[0017] Step 1: Install the equipment. Vertically set up the support assembly with the borehole and level it. Connect the tube body and tube head of the extraction assembly, and then clamp the tube body with the clamping assembly.

[0018] Step 2: Lay the extraction assembly. Control the rotating assembly to drive the clamping assembly to rotate. The clamping assembly rotates and drives the pipe body to rotate. At the same time, the pressing assembly applies pressure to the top of the pipe body, causing the pipe body to move downward, thus realizing the laying of the extraction assembly.

[0019] Step three, the outer wall of the laying process pipe head is cleaned, in the laying process, the pipe body is repeatedly exhausted and inflated through the air extraction device and the air inflation device, when the gas pressure in the pipe body reaches the first preset gas pressure during inflation, the exhaust is carried out, the annular block pushes the top of the arc-shaped baffle to repeatedly expand and contract outward, thereby cleaning the coal falling between the arc-shaped baffle and the fixed pipe; when encountering a soft coal seam, the arc-shaped baffle continues to expand and extrude the soft coal seam of the borehole wall by inflating the pipe body to an internal gas pressure of the second preset gas pressure, thereby supporting and guiding the borehole;

[0020] Step four, cleaning after entering the fault, when the pipe head is inserted into the thick coal seam fault, the pipe body is repeatedly exhausted to negative pressure and inflated to an internal pressure equal to the second preset gas pressure through the air extraction device and the air inflation device, the arc-shaped baffle is repeatedly expanded and vibrated to clean the arc-shaped baffle, and the fixed plate moves up and down to move the sliding rod in the locked state up and down and impact the lock block to clean the outer wall of the one-way valve piece;

[0021] Step five, extraction, the sliding rod and the lock block are unlocked by inflating the pipe body to an internal gas pressure reaching the third preset gas pressure, the third preset gas pressure is greater than the second preset gas pressure, the sliding rod is rotated and drives the guide block and the wedge-shaped sliding block to reset, thereby preparing for the next work; then the air extraction device is used for extraction work;

[0022] Step six, the device is pulled out, after the extraction work is completed, the pipe body drives the pipe head to move upward, thereby realizing the pulling out of the extraction assembly from the borehole.

[0023] The technical effects and advantages of the present application are as follows:

[0024] 1、The present application sets up support assembly, clamping assembly and down pressure assembly, support assembly can be erected above thick coal seam fault borehole, clamping assembly can clamp extraction assembly to realize positioning of extraction assembly, down pressure assembly can press extraction assembly into borehole to realize laying of extraction assembly, extraction assembly is composed of pipe body and pipe head, movable arc-shaped baffle is arranged on the outer side of pipe head, when pipe head moves in borehole, arc-shaped baffle can shield and protect air extraction hole to avoid rock and coal entering air extraction hole to cause air extraction hole blockage, thereby improving laying efficiency of extraction assembly and avoiding blockage of extraction assembly by coal and rock.

[0025] 2、The present application sets up rotating assembly, rotating assembly can rotate inside support assembly, clamping assembly includes multiple positioning wheels, positioning wheels can position extraction assembly without affecting upward and downward movement of extraction assembly, when down pressure assembly applies pressure to extraction assembly, clamping assembly drives extraction assembly to rotate to insert extraction assembly into borehole during rotation, thereby facilitating laying of extraction assembly.

[0026] 3、The present application sets up the extraction assembly, the extraction assembly includes the tube body and the tube head, and the fixed tube is arranged below the tube head, the fixed tube is provided with the air extraction hole, the arc baffle is arranged outside the fixed tube, the arc baffle can protect the air extraction hole in the process of the tube head movement, and when the tube head is inserted into the thick coal seam fault, the arc baffle can be automatically opened, so that the gas extraction work is facilitated, and the inside of the fixed tube is provided with the filter screen, so that the coal ash is prevented from entering the extraction assembly, so that the stable gas extraction work is ensured.

[0027] 4、The present application sets up the extraction assembly, the first aspect, the external coal slag coal block is prevented from entering the fixed tube, so that the tube body is prevented from being blocked, even if the coal block is pressed and resisted by the one-way valve piece during the pipe conveying process, the one-way valve door cannot be opened, so that the coal block cannot enter the tube body; the second aspect, when the soft coal seam is encountered, the arc baffle is continuously expanded outward by filling the gas with the second preset gas pressure in the tube body, so that the arc baffle presses the soft coal seam of the borehole inner wall, so that the borehole is supported and guided; the third aspect, the steps of repeatedly extracting and filling the gas with the second preset gas pressure are repeated, so that the arc baffle is repeatedly expanded and vibrated, so that the arc baffle is cleaned, and the one-way valve piece is vibrated, and then the outer wall of the one-way valve piece is cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the overall structure schematic diagram of the present application;

[0029] Figure 2 It is the support assembly structure schematic diagram of the present application;

[0030] Figure 3 It is the support assembly structure bottom view schematic diagram of the present application;

[0031] Figure 4 It is the rotation assembly and support assembly position relationship bottom view schematic diagram of the present application;

[0032] Figure 5 It is the rotation assembly and clamping assembly structure connection schematic diagram of the present application;

[0033] Figure 6 It is the rotation assembly structure bottom view of the present application;

[0034] Figure 7 It is the clamping assembly structure schematic diagram of the present application;

[0035] Figure 8 It is the clamping assembly and extraction assembly position relationship top view schematic diagram of the present application;

[0036] Figure 9 It is the down pressure assembly structure schematic diagram of the present application;

[0037] Figure 10 Structure diagram of the extraction assembly of the present application;

[0038] Figure 11 Structure diagram of the pipe body of the present application;

[0039] Figure 12 Structure diagram of the pipe head of the present application;

[0040] Figure 13 Structure diagram of the annular block of the present application;

[0041] Figure 14 Structure diagram of the arc-shaped baffle of the present application;

[0042] Figure 15 Structure diagram of the arc-shaped baffle contraction of the present application;

[0043] Figure 16 Structure diagram of the baffle opening state of the present application;

[0044] Figure 17 Three-dimensional sectional view of the structure in the present application Figure 16

[0045] Enlarged structure diagram of part A in the present application Figure 18 Figure 17 Enlarged structure diagram of part B in the present application

[0046] Enlarged structure diagram of part C in the present application Figure 19 Figure 17

[0047] Figure 20 Figure 17

[0048] ​​​​In the figure: 1, support assembly; 101, annular support plate; 102, circular through slot; 103, annular extension frame; 104, lifting screw; 105, positioning slide rod; 106, transmission gear; 107, connecting plate; 108, drive gear; 109, support screw; 2, rotating assembly; 201, annular movable plate; 202, roller; 203, annular extension plate; 204, protruding teeth; 3, pressing assembly; 301, movable seat; 302, pressing plate; 4, extraction assembly; 401, pipe body; 402, pipe head; 403, fixed pipe; 404, conical block; 405, air extraction hole; 406, one-way valve piece; 407, filter screen; 408, arc-shaped baffle; 409, annular block; 410, extension spring; 411, movable arm; 412, guide column; 413, fixed plate; 414, sliding rod; 415, stop block; 416, sliding groove; 417, compression spring; 418, wedge-shaped sliding block; 419, locking block; 420, return spring; 421, limiting block; 422, guide block; 423, half-circle spiral groove; 424, vertical groove; 425, half-circle spiral return groove; 5, clamping assembly; 501, support arm; 502, movable frame; 503, arc-shaped connecting rod; 504, positioning wheel; 505, electric telescopic rod; 6, arc-shaped plate; 7, inclined plate; 8, inclined guide plate. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0050] The present application provides a low-transparency thick coal seam fault gas extraction device as shown in Figures 1 to 20 The present application provides a low-transparency thick coal seam fault gas extraction device as shown in

[0051] The support assembly 1 comprises an annular support plate 101, and a circular through slot 102 is formed in the middle of the annular support plate 101; the bottom end of the annular support plate 101 is fixedly connected with an annular extension frame 103, and the annular support plate 101 is movably connected with a lifting screw 104 through a bearing; the two sides of the lifting screw 104 are provided with positioning slide rods 105 fixedly connected with the annular support plate 101.

[0052] The bottom end of the lifting screw rod 104 is fixedly connected with a transmission gear 106 located below the annular support plate 101, and the top end of the positioning sliding rod 105 is fixedly connected with a connecting plate 107 movably connected with the top end of the lifting screw rod 104; the top of the annular support plate 101 is provided with a drive motor with an output shaft penetrating through the annular support plate 101, and one end of the drive motor output shaft penetrating through the annular support plate 101 is connected with a drive gear 108.

[0053] The outer side of the annular extension frame 103 is threadedly connected with a support screw 109, the bottom end of the support screw 109 is movably connected with a support base through a bearing, and the top end of the support screw 109 is fixedly connected with a hand wheel; specifically, the support assembly 1 is erected above the thick coal seam fault drilling, the support screw 109 is rotated by the hand wheel to adjust the position of the support base, and the position of the support base is adjusted in sequence, so that the device can be leveled, the support assembly 1 is perpendicular to the drilling, and the pipe body 401 can be vertically inserted into the drilling.

[0054] The rotating assembly 2 includes an annular movable plate 201 located inside the circular through slot 102, the lower surface of the annular movable plate 201 is movably connected with a plurality of "H"-shaped rollers 202 arranged in an annular array through bearings, the rollers 202 are matched with the circular through slot 102, the lower side of the annular movable plate 201 is provided with an annular extension plate 203 movably connected with the rollers 202, the outer side of the annular extension plate 203 is fixedly connected with a plurality of annular array distributed protrusions 204, the protrusions 204 are engaged with the drive gear 108 and the transmission gear 106, and the top of the annular movable plate 201 is provided with a plurality of circumferentially arrayed clamping assemblies 5.

[0055] The clamping assembly 5 includes a group of supporting arms 501 hinged to the top of the annular movable plate 201, and each group of supporting arms 501 is provided with two; one end of the inner side wall of the supporting arm 501 is movably connected with a movable frame 502 through a pin shaft, both ends of the inner side wall of the movable frame 502 are fixedly connected with arc-shaped connecting rods 503, both ends of the arc-shaped connecting rod 503 are sleeved with positioning wheels 504, the middle part of each arc-shaped connecting rod 503 is movably connected with an electric telescopic rod 505 through a pin shaft, and one end of the electric telescopic rod 505 away from the arc-shaped connecting rod 503 is hinged to the annular movable plate 201; specifically, the extension and retraction of the electric telescopic rod 505 is controlled to drive the arc-shaped connecting rod 503 to move, and then drive the positioning wheel 504 to move, so that the positioning wheel 504 is attached to the outer side wall of the pipe body 401; since the arc-shaped connecting rod 503 is arranged in an arc-shaped structure, there is an included angle between the adjacent two positioning wheels 504, at this time, a plurality of positioning wheels 504 can form an annular structure, so that the positioning of the pipe body 401 can be realized, and the clamping action of the pipe body 401 can be realized.

[0056] The down-pressing assembly 3 comprises an arc-shaped movable seat 301, the middle part of the movable seat 301 is inlaid with a lead screw sleeve which is threadedly connected with the lifting lead screw 104, both ends of the movable seat 301 are inlaid with positioning sliding sleeves which are sleeved with the positioning sliding rods 105, the inner side of the movable seat 301 is fixedly connected with a pressing plate 302, and the bottom of the pressing plate 302 is provided with a rotating pressing ring; so as to facilitate the rotary insertion of the pipe body 401 into the drill hole, specifically, the driving motor drives the transmission gear 106 to rotate through the driving gear 108 and the protruding teeth 204, the transmission gear 106 rotates and drives the lifting lead screw 104 to rotate, under the joint action of the movable seat 301 and the lifting lead screw 104 and the movable seat 301 and the positioning sliding rod 105, the movable seat 301 moves downward, the movable seat 301 drives the pressing plate 302 to move downward, and then drives the rotating pressing ring to move downward, the rotating pressing ring applies pressure to the top end of the pipe body 401, so that the pipe body 401 moves downward, thereby realizing the laying of the extraction assembly 4.

[0057] The extraction assembly 4 comprises a pipe body 401 and a pipe head 402; the bottom end of the pipe head 402 is fixedly connected with a fixed pipe 403, the bottom end of the fixed pipe 403 is fixedly connected with a tapered block 404, a plurality of gas extraction holes 405 which are arranged in an annular array are formed through the outer side wall of the fixed pipe 403, one-way valve plates 406 are hinged in the gas extraction holes 405, a filter screen 407 which is connected with the pipe head 402 is inserted into the inside of the fixed pipe 403, and a plurality of arc-shaped baffles 408 which are arranged in an annular array are arranged on the outside of the fixed pipe 403; the arc-shaped baffle 408 comprises an arc-shaped plate 6, the bottom end of the arc-shaped plate 6 is fixedly connected with an inclined plate 7, and the top end of the arc-shaped plate 6 is fixedly connected with an inclined guide plate 8; specifically, the filter screen 407 is arranged in an annular structure, and the arrangement of the filter screen 407 can avoid the coal ash in the fault from entering the fixed pipe 403.

[0058] The bottom end of the inner side wall of the arc-shaped baffle 408 is movably connected with the bottom end of the outer side wall of the fixed pipe 403 through a pin shaft, the fixed pipe 403 is sleeved with an annular block 409, the top part of the annular block 409 is connected with the bottom part of the pipe head 402 through an extension spring 410, the outer side wall of the annular block 409 is connected with a plurality of movable arms 411 which are arranged in an annular array through pin shafts, and one end of the movable arm 411 is connected with the middle part of the inner side wall of the arc-shaped baffle 408 through a pin shaft; the top part of the annular block 409 is provided with a guide column 412, the guide column 412 penetrates through the pipe head 402, and the end located in the pipe head 402 is provided with a fixed plate 413.

[0059] The fixed plate 413 is provided with a through hole on one side, a sliding rod 414 is slidably connected in the through hole, the top of the sliding rod 414 is provided with a stop block 415, the bottom of the sliding rod 414 penetrates through the filter screen 407 and extends into the fixed tube 403, a sliding groove 416 is formed in the circumferential wall of the end located in the fixed tube 403, a wedge-shaped sliding block 418 which is slidably connected with the sliding groove 416 is connected in the sliding groove 416 through a compression spring 417; the one-way valve piece 406 is provided with a locking block 419 which is locked with the wedge-shaped sliding block 418 on the side close to the filter screen 407, a reset spring 420 is sleeved on the top of the sliding rod 414, one end of the reset spring 420 is connected with the fixed plate 413, and the other end is connected with the stop block 415.

[0060] The middle of the sliding rod 414 is provided with a limiting block 421, the lower part of the sliding rod 414 is provided with a guide block 422 on the side wall, the top of the filter screen 407 is provided with a half spiral groove 423 matched with the guide block 422, the top of the bottom end of the half spiral groove 423 is provided with a vertical groove 424; the bottom of the filter screen 407 is provided with a half spiral reset groove 425 matched with the wedge-shaped sliding block 418; the top end of the bottom of the half spiral reset groove 425 is provided with a vertical groove 424; specifically, through the half spiral groove 423 and the guide block 422, when the gas is filled into the pipe body 401, under the action of the gas pressure, the fixed plate 413 pushes the guide column 412 and the limiting block 421 to move downward, the guide column 412 moves downward and pushes the annular block 409 to move downward, because the middle part of the arc-shaped baffle 408 is hinged with the annular block 409 through the movable arm 411, and the bottom of the arc-shaped baffle 408 is hinged with the outer wall of the fixed pipe 403, under the pushing action of the annular block 409, the top of the arc-shaped baffle 408 rotates outward, the bottom rotates inward, the limiting block 421 moves downward to drive the sliding rod 414 to move downward, the sliding rod 414 moves downward to drive the wedge-shaped sliding block 418 to move downward and abut against the lock block 419, under the wedge-shaped cooperation, the wedge-shaped sliding block 418 is extruded and compressed spring 417 is stored in the sliding groove 416, so as to pass through the lock block 419; further, the locking of the one-way valve plate 406 and the sliding rod 414 can be completed, under the continuous inflation, the guide block 422 slides and inserts into the half spiral groove 423, under the action of the half spiral groove 423, the sliding rod 414 rotates by half, the sliding rod 414 rotates and drives the wedge-shaped sliding block 418 to rotate to the side not abutting against the lock block 419, then the gas is discharged through the air exhaust device, under the action of the extension spring 410, the fixed plate 413 moves upward, the fixed plate 413 moves upward and pushes the sliding rod 414 to move upward through the reset spring 420, because the bottom end of the half spiral groove 423 is provided with a vertical groove 424, then the guide block 422 slides out along the vertical groove 424, and the sliding rod 414 and the lock block 419 are unlocked, under the continuous pushing action of the extension spring 410, the wedge-shaped sliding block 418 slides into the half spiral reset groove 425, under the spiral guiding action of the half spiral reset groove 425, the sliding rod 414 rotates, so that the sliding rod 414 rotates and drives the guide block 422 and the wedge-shaped sliding block 418 to reset, thereby preparing for the next work.

[0061] The pipe body 401 is provided with a plurality of pipe bodies 401 connected end to end; a sealing gasket is arranged between the two adjacent pipe bodies 401; the inner side wall top end of the pipe body 401 is provided with an internal thread; the outer side of the bottom end of the pipe body 401 is provided with an external thread matched with the internal thread; a positioning bolt is inserted and connected in the screw hole opened at the outer side wall top end of the pipe body 401; and the outer side wall bottom end of the pipe body 401 is provided with a positioning screw hole matched with the positioning bolt; specifically, the external thread at the bottom end of the adjacent pipe body 401 is connected with the internal thread at the top end, and then the plurality of pipe bodies 401 are connected end to end through the positioning bolt; the inner side wall top end of the pipe head 402 is provided with a connecting thread matched with the external thread; a threaded hole is opened in the circumferential side wall of the pipe head 402; and a fixing bolt matched with the threaded hole is inserted and connected in the threaded hole; specifically, the pipe body 401 of the extraction assembly 4 is threadedly spliced with the pipe head 402, and the fixing bolt is passed through the threaded hole and connected with the threaded hole, so that the pipe body 401 is fixedly connected with the pipe head 402.

[0062] In use, first, the support assembly 1 is erected above the thick coal seam fault drilling, the support screw 109 is rotated by rotating the hand wheel, so that the position of the support can be adjusted, the position of the support is adjusted in turn, the leveling of the device can be realized, so that the support assembly 1 is perpendicular to the drilling, and then the pipe body 401 can be inserted into the drilling vertically; then the pipe body 401 and the pipe head 402 of the extraction assembly 4 are screwed together, and the fixing bolt is connected with the threaded hole by penetrating the threaded hole, so that the pipe body 401 and the pipe head 402 are fixedly connected; then the butt-jointed pipe body 401 and the pipe head 402 are inserted into the annular movable plate 201, and then the extension of the electric telescopic rod 505 is controlled, so that the arc-shaped connecting rod 503 is pushed to move, and then the positioning wheel 504 is driven to move, so that the positioning wheel 504 is attached to the outer side wall of the pipe body 401. Since the arc-shaped connecting rod 503 is arranged in an arc-shaped structure, there is an included angle between the adjacent two positioning wheels 504, and at this time, the plurality of positioning wheels 504 can form a ring structure, so that the positioning effect of the pipe body 401 can be realized, and then the clamping effect of the pipe body 401 can be realized; then the driving motor is started by controlling the driving motor, the driving motor is started and drives the driving gear 108 to rotate, the driving gear 108 rotates and drives the transmission gear 106 to rotate through the protruding teeth 204, the protruding teeth 204 rotate and drive the annular extension plate 203 to rotate, and then the annular movable plate 201 is driven to rotate; since the annular movable plate 201 is connected with the annular support plate 101 through the roller 202, the annular movable plate 201 can rotate in the circular through slot 102 in the middle of the annular support plate 101, the annular movable plate 201 can drive the clamping assembly 5 to rotate, and then the positioning wheel 504 is driven to rotate, the clamped pipe body 401 is driven to rotate by the positioning wheel 504, the transmission gear 106 is rotated, the lifting lead screw 104 is driven to rotate by the transmission gear 106, and under the joint action of the movable seat 301 and the lifting lead screw 104 and the movable seat 301 and the positioning slide rod 105, the movable seat 301 moves downward, the movable seat 301 drives the pressing plate 302 to move downward, and then the rotating pressing ring moves downward, the rotating pressing ring applies pressure to the top end of the pipe body, so that the pipe body 401 moves downward, and then the laying of the extraction assembly 4 is realized; with the conveying of the pipe body 401, when a section of the pipe body 401 is inserted into the hole, the device is stopped, another section of the pipe body 401 is selected for splicing, and then the pipe head 402 is inserted into the thick coal seam fault.

[0063] When the pipe head 402 is inserted into the drill hole, first connect the pipe body 401 with the inflation device, fill the gas with a preset pressure into the pipe body 401 through the inflation device, because the one-way valve sheet 406 can only open inwardly, due to the inflation, the gas pressure inside the space composed of the pipe body 401 and the pipe head 402 becomes larger and larger, under the action of the gas pressure, the fixed plate 413 pushes the guide column 412 and the limiting block 421 to move downward, the guide column 412 moves downward and pushes the annular block 409 to move downward, because the middle part of the arc-shaped baffle 408 is hinged with the annular block 409 through the movable arm 411, and the bottom of the arc-shaped baffle 408 is hinged with the outer wall of the fixed pipe 403, under the pushing action of the annular block 409, the top of the arc-shaped baffle 408 rotates outwardly, and the bottom rotates inwardly, the limiting block 421 moves downward to drive the sliding rod 414 to move downward, the sliding rod 414 moves downward to drive the wedge-shaped sliding block 418 to move downward and abut against the lock block 419, under the wedge-shaped cooperation, the wedge-shaped sliding block 418 is squeezed to compress the spring 417 and is then accommodated in the sliding groove 416, so as to pass the lock block 419; so as to complete the locking of the one-way valve sheet 406 and the sliding rod 414; at this time, due to the limiting of the lock block 419 to the top of the wedge-shaped sliding block 418, the guide column 412 cannot move upward, and due to the abutment of the one-way valve sheet 406 and the sliding rod 414, the locking of the one-way valve sheet 406 and the sliding rod 414 is realized; then exhaust through the exhaust device, because the one-way valve sheet 406 and the sliding rod 414 are locked at this time, the gas outside the exhaust hole 405 cannot enter the pipe body 401 through the exhaust hole 405, so as to avoid the external coal cinder and coal block from entering the fixed pipe 403, so as to avoid the blockage of the pipe body 401, even if the one-way valve sheet 406 is squeezed and abutted by the coal block during the pipe conveying process, the one-way valve 401 cannot be opened, so as to avoid the coal block from entering the pipe body 401, due to the exhaust and pressure relief of the pipe body 401, under the action of the extension spring 410, the fixed plate 413 is pushed to move upward after overcoming the elastic force of the return spring 420; during the pipe conveying process, the gas is filled into the pipe body 401 until the internal gas pressure reaches the first preset gas pressure, then the internal gas of the pipe body 401 is exhausted until the internal gas pressure is less than the first preset gas pressure and greater than the above-mentioned preset gas pressure, the above-mentioned filling and exhausting control is repeated, the fixed plate 413 pushes the guide column 412 and the annular block 409 to move upward and downward repeatedly, the annular block 409 pushes the top of the arc-shaped baffle 408 to expand and contract outwardly repeatedly, so as to clean the coal falling between the arc-shaped baffle 408 and the fixed pipe 403; when the soft coal layer is encountered, the gas is filled into the pipe body 401 until the internal gas pressure reaches the second preset gas pressure, the second preset gas pressure is greater than the first preset gas pressure, and the second preset gas pressure is not enough to make the guide column 412 slide into the half-circle spiral groove 423; due to the gas filled with the second preset gas pressure, the guide column 412 and the annular block 409 are pushed downward by the fixed plate 413, so as to make the arc-shaped baffle 408 continue to expand outwardly, so as to make the arc-shaped baffle 408 squeeze the soft coal layer of the inner wall of the drill hole, so as to form the support and guide for the drill hole.

[0064] With the feeding of the pipe body 401, when the pipe head 402 is inserted into the thick coal seam fault, the pipe body 401 is drawn to negative pressure by the air extraction device, under the action of the negative pressure, the fixed plate 413 drives the guide column 412 to move upward after overcoming the expansion spring 410, so that the expansion spring 410 is compressed to the shortest, so that the coal blocks between the expansion spring 410 are crushed or the coal slurry is extruded, and then the pipe body 401 is filled with gas of the second preset gas pressure, so that the fixed plate 413 drives the guide column 412 to move downward, the guide column 412 drives the annular block 409 to move downward, the top of the arc-shaped baffle 408 expands outward, and the bottom rotates inward, on the one hand, the annular block 409 cleans the outer wall of the fixed pipe 403; then repeat the above steps of drawing to negative pressure and filling gas to the gas pressure reaching the second preset gas pressure, so that the arc-shaped baffle 408 repeatedly expands and vibrates, thereby cleaning the arc-shaped baffle 408, and the fixed plate 413 moves up and down to push the sliding rod 414 in the locked state at this time up and down and impact the lock block 419, thereby vibrating the one-way valve plate 406, and then cleaning the outer wall of the one-way valve plate 406.

[0065] After cleaning is completed, the pipe body 401 is filled with gas to an internal gas pressure reaching a third preset gas pressure, the third preset gas pressure is greater than the second preset gas pressure, under the action of the gas pressure, the fixed plate 413 drives the sliding rod 414 to move downward, and the guide block 422 slides and inserts into the half-circle spiral groove 423, under the action of the half-circle spiral groove 423, the sliding rod 414 rotates by half a circle, the sliding rod 414 rotates and drives the wedge-shaped sliding block 418 to rotate to the side not in contact with the lock block 419, then the air extraction device is used for exhaust, under the action of the expansion spring 410, the fixed plate 413 moves upward, the fixed plate 413 moves upward by the reset spring 420 to push the sliding rod 414 to move upward, because the bottom end of the half-circle spiral groove 423 is provided with a vertical groove 424, then the guide block 422 slides out along the vertical groove 424, and the sliding rod 414 is unlocked with the lock block 419, under the continued driving action of the expansion spring 410, the wedge-shaped sliding block 418 slides into the half-circle spiral reset groove 425, under the spiral guiding action of the half-circle spiral reset groove 425, the sliding rod 414 rotates, so that the sliding rod 414 rotates and drives the guide block 422 and the wedge-shaped sliding block 418 to reset, thereby preparing for the next work; then the air extraction device is used for extraction work, because the sliding rod 414 is unlocked with the lock block 419 at this time, the one-way valve plate 406 can be opened inward, so that the extraction can be smoothly carried out.

[0066] After the extraction work is completed, the pipe body 401 is subjected to an upward force by the pipe pulling device, at this time the pipe body 401 drives the pipe head 402 to move upward, when the pipe head 402 moves upward to the bottom of the drill hole, the inclined surface of the upper surface of the inclined guide plate 8 is extruded by the inner wall of the drill hole, so that the inclined guide plate 8 drives the arc-shaped baffle 408 to move, and then the arc-shaped baffle 408 moves, at this time the arc-shaped baffle 408 will not affect the movement of the pipe head 402 in the drill hole, and the pipe body 401 and the pipe head 402 can be pulled out of the drill hole.

[0067] The application also provides a use method of the low-transparency thick coal seam fault gas extraction device, which specifically comprises the following steps:

[0068] Step one, install the equipment, vertically erect the supporting assembly 1 with the drill hole and level it; butt the pipe body 401 and the pipe head 402 of the extraction assembly 4, and then clamp the pipe body 401 through the clamping assembly 5;

[0069] Step two, lay the extraction assembly, control the rotating assembly 2 to drive the clamping assembly 5 to rotate, the clamping assembly 5 rotates and drives the pipe body 401 to rotate, and at the same time the downward pressing assembly 3 applies pressure to the top end of the pipe body, so that the pipe body 401 moves downward, and the laying of the extraction assembly 4 is realized;

[0070] Step three, clean the outer wall of the pipe head during the laying process, repeatedly exhaust and inflate the pipe body 401 through the air extraction equipment and the air inflation equipment, and when the gas pressure in the pipe body 401 reaches the first preset gas pressure during inflation, exhaust the gas, so that the annular block 409 pushes the top of the arc-shaped baffle 408 to repeatedly expand and contract outward, thereby cleaning the coal falling between the arc-shaped baffle 408 and the fixed pipe 403; when soft coal seams are encountered, inflate the pipe body 401 to an internal gas pressure of the second preset gas pressure, so that the arc-shaped baffle 408 continues to expand and extrude the soft coal seams of the inner wall of the drill hole, thereby supporting and guiding the drill hole;

[0071] Step four, clean after entering the fault, when the pipe head 402 is inserted into the thick coal seam fault, repeatedly exhaust the pipe body 401 to a negative pressure and inflate the pipe body 401 to an internal pressure equal to the second preset gas pressure through the air extraction equipment and the air inflation equipment, so that the arc-shaped baffle 408 repeatedly expands and vibrates to clean the arc-shaped baffle 408, and the fixed plate 413 moves up and down to push the sliding rod 414 in the locked state to move up and down and impact the lock block 419, thereby cleaning the outer wall of the one-way valve plate 406;

[0072] Step five, extraction, inflate the pipe body 401 to an internal gas pressure reaching the third preset gas pressure, which is greater than the second preset gas pressure, so that the sliding rod 414 and the lock block 419 are unlocked, and the sliding rod 414 rotates and drives the guide block 422 and the wedge-shaped sliding block 418 to reset, thereby preparing for the next work; then perform the extraction work through the air extraction equipment;

[0073] Step six, device pulling out, after the extraction work is completed, the pipe body 401 is subjected to an upward force by the pipe pulling device, at this time the pipe body 401 drives the pipe head 402 to move upward, so as to realize the pulling out of the extraction assembly 4 from the borehole.

[0074] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A gas extraction device for faults in low-permeability thick coal seams, comprising a support assembly, characterized in that, A rotating component is provided in the middle of the support component, a pressing component is provided above the support component, and an extraction component is provided in the middle of the rotating component; a clamping component is provided on the top of the rotating component in a circular array. The extraction assembly includes a tube body and a tube head; a fixed tube is fixedly connected to the bottom end of the tube head, and a conical block is fixedly connected to the bottom end of the fixed tube. Multiple air extraction holes arranged in a ring array are opened through the outer side wall of the fixed tube. A one-way valve plate is hinged in the air extraction hole. A filter screen connected to the tube head is inserted into the inside of the fixed tube. Multiple arc-shaped baffles arranged in a ring array are provided on the outer side of the fixed tube. The bottom end of the inner wall of the arc-shaped baffle is movably connected to the bottom end of the outer wall of the fixed tube via a pin. An annular block is sleeved on the outer side of the fixed tube. The top of the annular block is connected to the bottom of the tube head via a telescopic spring. Multiple movable arms arranged in a circular array are connected to the outer wall of the annular block via pins. One end of each movable arm is connected to the middle of the inner wall of the arc-shaped baffle via a pin. A guide post is provided at the top of the annular block. The guide post passes through the tube head, and a fixed plate is provided at one end inside the tube head. The fixed plate has a through hole on one side, and a sliding rod is slidably connected in the through hole. The top of the sliding rod has a stop block, and the bottom of the sliding rod passes through the filter screen and extends into the fixed tube. A groove is opened on the peripheral wall of one end of the sliding rod located in the fixed tube. A wedge-shaped slider is slidably connected to the groove through a compression spring. The one-way valve plate has a locking block on the side near the filter screen that locks with the wedge-shaped slider. A return spring is sleeved on the top of the sliding rod. One end of the return spring is connected to the fixed plate, and the other end is connected to the stop block. A limiting block is provided in the middle of the sliding rod, and a guide block is provided on the side wall of the sliding rod below the limiting block. A semi-circular spiral groove that cooperates with the guide block is opened at the top of the filter screen, and a vertical groove is opened at the top of the bottom end of the semi-circular spiral groove. A semi-circular spiral reset groove that cooperates with the wedge-shaped slider is opened at the bottom of the filter screen, and a vertical groove is opened at the bottom of the top end of the semi-circular spiral reset groove.

2. The low-permeability thick coal seam fault gas extraction device according to claim 1, characterized in that, The support assembly includes an annular support plate with a circular through groove in the middle; an annular extension frame is fixedly connected to the bottom end of the annular support plate; a lifting screw is movably connected to the annular support plate via bearings; and positioning slide rods fixedly connected to the annular support plate are provided on both sides of the lifting screw.

3. The low-permeability thick coal seam fault gas extraction device according to claim 2, characterized in that, The bottom end of the lifting screw is fixedly connected to a transmission gear located below the annular support plate, and the top end of the positioning slide rod is fixedly connected to a connecting plate that is movably connected to the top end of the lifting screw; the top of the annular support plate is provided with a drive motor whose output shaft passes through the annular support plate, and one end of the drive motor output shaft that passes through the annular support plate is connected to a drive gear; the outer side of the annular extension frame is threadedly connected to a support screw, the bottom end of the support screw is movably connected to a support via a bearing, and the top end of the support screw is fixedly connected to a handwheel.

4. The low-permeability thick coal seam fault gas extraction device according to claim 3, characterized in that, The rotating assembly includes an annular movable plate located inside a circular through groove. The lower surface of the annular movable plate is movably connected to multiple rollers with an "H"-shaped cross-section arranged in a circular array via bearings. The rollers are adapted to the circular through groove. An annular extension plate is provided below the annular movable plate and is movably connected to the rollers. Multiple protruding teeth arranged in a circular array are fixedly connected to the outer side of the annular extension plate. The protruding teeth mesh with the drive gear and the transmission gear. A clamping assembly arranged in a circumferential array is provided on the top of the annular movable plate.

5. A low-permeability, thick coal seam fault gas extraction device according to claim 4, characterized in that, The clamping assembly includes a set of two support arms hinged to the top of the annular movable plate. One end of the inner sidewall of each support arm is movably connected to a movable frame via a pin. Both ends of the inner sidewall of the movable frame are fixedly connected to arc-shaped connecting rods. Both ends of the arc-shaped connecting rods are sleeved with positioning wheels. The middle of each arc-shaped connecting rod is movably connected to an electric telescopic rod via a pin. The ends of the two electric telescopic rods away from the arc-shaped connecting rods are hinged to the annular movable plate.

6. A low-permeability, thick coal seam fault gas extraction device according to claim 2, characterized in that, The pressing assembly includes an arc-shaped movable seat, in which a screw sleeve connected to the lifting screw is embedded in the middle. Both ends of the movable seat are inlaid with positioning sleeves that are sleeved with positioning slide rods. A pressure plate is fixedly connected to the inner side of the movable seat, and a rotating pressure ring is provided at the bottom of the pressure plate.

7. A method for using a low-permeability, thick coal seam fault gas extraction device, comprising the following steps: [Details of the steps described in claim 4 are missing from the provided text.] Step 1: Install the equipment. Vertically set up the support assembly with the borehole and level it. Connect the tube body and tube head of the extraction assembly, and then clamp the tube body with the clamping assembly. Step 2: Lay the extraction assembly. Control the rotating assembly to drive the clamping assembly to rotate. The clamping assembly rotates and drives the pipe body to rotate. At the same time, the pressing assembly applies pressure to the top of the pipe body, causing the pipe body to move downward, thus realizing the laying of the extraction assembly. Step 3: Cleaning the outer wall of the pipe head during the laying process. During the laying process, the pipe body is repeatedly vented and inflated using air extraction and inflation equipment. When inflating, the gas pressure inside the pipe body reaches the first preset pressure, and then the gas is vented. This causes the annular block to push the top of the arc-shaped baffle to repeatedly expand and contract outward, thereby cleaning the coal that falls between the arc-shaped baffle and the fixed pipe. When encountering a soft coal seam, the pipe body is inflated until the internal air pressure reaches the second preset pressure, causing the arc-shaped baffle to continue to expand outward and squeeze the soft coal seam on the inner wall of the borehole, thereby supporting and guiding the borehole. Step 4: Cleaning after entering the fault. When the pipe head is inserted into the thick coal seam fault, the pipe body is repeatedly pumped to negative pressure and filled with air until the internal pressure is equal to the second preset air pressure through the air extraction equipment and air filling equipment. This causes the arc-shaped baffle to expand and vibrate repeatedly to clean the arc-shaped baffle. At the same time, the fixed plate moves up and down, which pushes the sliding rod, which is in the locked state at this time, to move up and down and hit the locking block to clean the outer wall of the one-way valve plate. Step 5: Extraction. By inflating the tube to the third preset air pressure, which is greater than the second preset air pressure, the sliding rod is unlocked from the locking block, and the sliding rod rotates, causing the guide block and wedge slider to reset, thus preparing for the next operation; then the extraction is carried out using the air extraction equipment. Step Six: Device Pulling Out. After the extraction work is completed, use the tube pulling device to apply an upward force to the tube body. At this time, the tube body drives the tube head to move upward, thereby realizing the extraction component being pulled out of the borehole.

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