Pipeline blockage preventing structure and method for coal mine gas extraction

Abstract

The invention discloses a structure and a method for preventing blockage of a pipeline for coal mine gas extraction, and relates to the technical field of coal mine gas extraction, the structure comprises a base and an extraction pipe, a gas storage tank is mounted above the base, an extraction pump is mounted above a connecting block, a servo motor is mounted above a connecting frame, and the servo motor is connected with the base. And a sliding block is installed on the ball screw, a borescope lamp is installed on the left side of the reinforcing block, and a fixing ring is installed on the left side of the reinforcing block through a connecting strip. According to the pipeline blockage preventing structure and method for coal mine gas extraction, the filter cartridge and the filter screen are arranged, the extraction pump extracts gas in a drill hole through the connecting pipe and the extraction pipe, when the gas passes through the extraction pipe, the gas can sequentially pass through the filter cartridge and the filter screen, impurities in the gas are filtered out, the impurities passing through the filter cartridge can fall into the filter cartridge, and therefore the gas extraction efficiency is improved. Therefore, impurities in the gas are prevented from blocking the connecting pipe and the extraction pipe, the gas is doubly filtered, and the filtering effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas extraction, and in particular to a structure and method for preventing pipeline blockage in coal mine gas extraction. Background Art

[0002] The main component of coal mine gas is methane, which is a flammable and explosive gas. The gas may also contain other gas components such as carbon dioxide and nitrogen. The gas itself is non-toxic, but at high concentrations it will reduce the oxygen content in the air and cause suffocation.

[0003] Coal mine gas extraction refers to the use of extraction equipment to extract gas from coal seams and goafs to the ground, in order to reduce the amount of gas outflow during mining, prevent gas over-limit and accumulation, and prevent gas explosions and coal and gas outburst accidents. Specifically, gas extraction is to drill in coal seams and gas accumulation areas, connect the boreholes to a dedicated pipeline, and use extraction equipment to extract gas to the ground or discharge it into the total return air flow.

[0004] For example, the gas extraction device for improving the gas extraction concentration in coal mine tunnels with application number 202421117399.7 has a plugging function, which completely seals the extraction hole to ensure that the internal gas will not escape during the extraction process. At the same time, the external air cannot enter the extraction hole, ensuring the internal sealing and improving the gas extraction concentration. In conjunction with the filtering device, the air in the mixed gas is further filtered to reduce the air content in the extracted gas, greatly improving the gas extraction concentration. However, the device still has certain defects;

[0005] During the gas extraction process, impurities and coal slag in the coal mine will be pumped into the pipeline together, causing the impurities and coal slag to accumulate in the pipeline, resulting in blockage inside the pipeline, thereby reducing the gas extraction efficiency of the pipeline.

[0006] Therefore, we proposed a structure and method for preventing pipeline blockage in coal mine gas extraction in order to solve the problems raised above. Summary of the invention

[0007] The purpose of the present invention is to provide a structure and method for preventing pipeline blockage in coal mine gas extraction, so as to solve the problem raised by the above background technology that in the current market, impurities and coal slag in the coal mine are sucked into the pipeline during gas extraction, so that the impurities and coal slag are accumulated in the pipeline, resulting in blockage inside the pipeline, thereby reducing the gas extraction efficiency of the pipeline.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure and method for preventing pipeline blockage of coal mine gas extraction, comprising a base and an extraction pipe, a gas storage tank is installed above the base, and a connecting block is installed on the left side of the gas storage tank, an extraction pump is installed above the connecting block, and a connecting pipe and an exhaust pipe are installed on the left and right sides of the extraction pump, respectively, a connecting frame is installed above the gas storage tank, a servo motor is installed above the connecting frame, and a ball screw is installed below the servo motor through an output shaft, a slider is installed on the ball screw, and a reinforcing block is installed on the left side of the slider, a hole searchlight is installed on the left side of the reinforcing block, a fixing ring is installed on the left side of the reinforcing block through a connecting strip, and the extraction pipe is installed on the fixing ring;

[0009] A guide groove is provided on the left side of the extraction tube, a fixing block is installed on the inner upper surface of the extraction tube, and a right-angle groove is provided on the inner upper surface of the extraction tube, a limiting groove and an inclined thread groove are provided inside the fixing block, an outer cover is installed below the extraction tube, and a sealing cover is provided on the outer cover, a positioning bolt rod is passed through the sealing cover, and a filter cartridge is provided inside the extraction tube;

[0010] A filter screen is arranged at the left end of the extraction tube, and a guide rod and an abutment bar are installed on the right side of the filter screen. A plugging head is threadedly connected to the outer surface of the extraction tube.

[0011] Preferably, traveling wheels are installed below the base, and four traveling wheels are provided, the traveling wheels are distributed in a rectangular structure, and a push rod is installed on the upper right side of the base.

[0012] With the above structural design, the device can be easily moved through the traveling wheels, and the device can be pushed to the position where gas extraction is required through the traveling wheels and the push rod.

[0013] Preferably, the connecting pipe is designed to be a retractable structure, the connecting pipe is connected to the extraction pipe, and the exhaust pipe is connected to the interior of the gas storage tank.

[0014] With the above-mentioned structural design, the extraction pump is started, and the extraction pump extracts the gas in the borehole through the connecting pipe and the extraction pipe. When the gas passes through the extraction pipe, it can pass through the filter cartridge and the filter net in turn to filter the impurities in the gas. The impurities in the filter cartridge can fall into the interior of the filter cartridge, thereby preventing the impurities in the gas from causing blockage of the connecting pipe and the extraction pipe. The extracted gas is then transported to the gas storage tank through the exhaust pipe.

[0015] Preferably, a guide frame is installed on the left side of the gas storage tank, and the guide frame passes through the reinforcement block. The reinforcement block is slidably connected to the guide frame, and the guide frame is connected to the slider through a bearing seat.

[0016] With the above structural design, when the ball screw rotates, the ball screw drives the slider to move up and down, and the slider drives the extraction tube to move up and down through the reinforcement block, the connecting strip and the fixed ring. The reinforcement block moves up and down along the guide frame, so that the extraction tube moves up and down more stably and will not deviate.

[0017] Preferably, two hole search lights are provided, and the filter cartridge can abut against the right-angle groove.

[0018] With the above structural design, it is convenient to observe the condition of the borehole through the hole search light, which facilitates the advancement of gas extraction work. When installing the filter cartridge, the upper end of the filter cartridge can be snap-connected with the right-angle groove in the extraction pipe, which is convenient for the installation of the filter cartridge.

[0019] Preferably, the positioning bolt rod is threadably connected to the inclined thread groove, and the inclined thread groove is communicated with the limiting groove.

[0020] With the above structural design, when the filter cartridge and filter screen need to be cleaned, the positioning bolt rod can be rotated to disengage the positioning bolt rod from the inclined thread groove. At this time, the positioning bolt rod is away from the abutment bar, releasing the extrusion limit on the abutment bar. At this time, the sealing cover can be removed, and the filter cartridge can be removed. At the same time, the filter screen on the left side can be directly pulled out to the left, and the disassembly of the filter cartridge and the filter screen can be completed at the same time.

[0021] Preferably, a rubber sealing block is provided on the sealing cover, a positioning bolt rod passes through the sealing cover, and a limiting nut is provided on the positioning bolt rod.

[0022] With the above structural design, the sealing cover seals the outer cover to prevent gas leakage inside the extraction pipe.

[0023] Preferably, the filter cartridge is designed as an inclined structure in the extraction tube, and the positioning bolt rod passes through the filter cartridge.

[0024] With the above-mentioned structural design, when installing the filter cartridge and the filter screen, the filter cartridge and the filter screen are inserted into the interior of the extraction tube, and the guide rod on the filter screen abuts against the guide groove on the extraction tube, so that the abutment strip on the filter screen is clamped in the limit groove, and then the positioning bolt rod is passed into the interior of the extraction tube along the hole groove on the sealing cover and the filter cartridge, and connected to the inclined threaded groove on the fixing block, and at the same time, the positioning bolt rod abuts against the abutment strip to complete the fixation of the abutment strip, thereby simultaneously completing the fixation of the filter screen and the filter cartridge.

[0025] Preferably, two guide rods are provided, and the guide rods can abut against the inside of the guide groove on the extraction tube, and the abutment bar can abut against the inside of the limit groove on the fixed block.

[0026] With the above structural design, the guide rod on the filter screen abuts against the guide groove on the extraction tube, which guides the abutment bar on the filter screen, so that the abutment bar is clamped in the limit groove.

[0027] Preferably, the method of use specifically comprises the following steps:

[0028] S1. Drill a hole at the location where gas extraction is to be carried out in advance, push the device to the location where gas extraction is required through the traveling wheel and the push rod, align the extraction tube with the location of the drill hole, and if the extraction tube and the drill hole are at different heights, start the servo motor, the servo motor drives the ball screw to rotate through the output shaft, the ball screw drives the slider to move up and down, the slider drives the extraction tube to move up and down through the reinforcing block, the connecting strip and the fixing ring, and aligns the extraction tube with the drill hole;

[0029] S2. Rotate the plugging head to make it contact with the surface of the borehole, so that the sealing pad on the surface of the plugging head can seal the gas when it is extracted, thus preventing the gas from overflowing and causing a major safety hazard;

[0030] S3, start the extraction pump, the extraction pump extracts the gas in the borehole through the connecting pipe and the extraction pipe. When the gas passes through the extraction pipe, it can pass through the filter cartridge and the filter net in sequence to filter the impurities in the gas. The impurities in the filter cartridge can fall into the inside of the filter cartridge, thereby preventing the impurities in the gas from causing blockage of the connecting pipe and the extraction pipe. The extracted gas is then transported to the gas storage tank through the exhaust pipe;

[0031] S4. When the filter cartridge and filter screen need to be cleaned, the positioning bolt rod can be rotated to disengage the positioning bolt rod from the inclined threaded groove. At this time, the positioning bolt rod is away from the abutment bar, and the extrusion limit on the abutment bar is released. At this time, the sealing cover can be removed to remove the filter cartridge, and the filter screen on the left side can be directly pulled out to the left, and the disassembly of the filter cartridge and the filter screen is completed at the same time. When installing the filter cartridge and the filter screen, the filter cartridge and the filter screen are inserted into the interior of the extraction tube, and the guide rod on the filter screen abuts against the guide groove on the extraction tube, so that the abutment bar on the filter screen is clamped in the limit groove, and then the positioning bolt rod is passed into the interior of the extraction tube along the hole groove on the sealing cover and the filter cartridge, and connected with the inclined threaded groove on the fixing block. At the same time, the positioning bolt rod abuts against the abutment bar to complete the fixation of the abutment bar, thereby completing the fixation of the filter screen and the filter cartridge at the same time.

[0032] Compared with the prior art, the beneficial effects of the present invention are: the pipeline blockage structure and method for preventing coal mine gas extraction are:

[0033] 1. A filter cartridge and a filter net are provided. The extraction pump extracts the gas in the borehole through the connecting pipe and the extraction pipe. When the gas passes through the extraction pipe, it can pass through the filter cartridge and the filter net in turn to filter the impurities in the gas. The impurities in the filter cartridge can fall into the inside of the filter cartridge, thereby preventing the impurities in the gas from causing blockage of the connecting pipe and the extraction pipe. The gas is double filtered, and the filtering effect is better;

[0034] 2. A positioning bolt rod is provided. When the filter cartridge and the filter screen need to be cleaned, the positioning bolt rod can be rotated to disengage the positioning bolt rod from the inclined thread groove. At this time, the positioning bolt rod is away from the abutment bar, and the extrusion limit of the abutment bar is released. At this time, the sealing cover can be removed to remove the filter cartridge. At the same time, the filter screen on the left side can be directly pulled out to the left. At the same time, the filter cartridge and the filter screen are disassembled, which is convenient for maintenance of the filter cartridge and the filter screen;

[0035] 3. A ball screw is provided. When the height of the extraction tube and the drill hole are different, the servo motor is started. The servo motor drives the ball screw to rotate through the output shaft, and the ball screw drives the slider to move up and down. The slider drives the extraction tube to move up and down through the reinforcing block, the connecting strip and the fixing ring, so that the extraction tube is aligned with the drill hole, which is convenient for adjusting the height of the extraction tube;

[0036] 4. A borehole search light is provided, which facilitates observation of the borehole condition and facilitates the advancement of gas extraction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a partial cross-sectional structural schematic diagram of the present invention;

[0038] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0039] Figure 3 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0040] Figure 4 This is a schematic diagram of the structure of the filter cartridge and filter screen when installed;

[0041] Figure 5 This is a schematic diagram of the structure of the filter cartridge and the filter screen when they are disassembled;

[0042] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0043] Figure 7 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0044] Figure 8 It is a schematic diagram of the filter cartridge structure of the present invention;

[0045] Fig. 9 This is a schematic diagram of the filter structure of the present invention;

[0046] Fig.10 It is a schematic diagram of the position structure of the reinforcement block and the guide frame of the present invention.

[0047] In the figure: 1. base; 2. traveling wheel; 3. push rod; 4. gas storage tank; 5. connecting block; 6. extraction pump; 7. connecting pipe; 8. exhaust pipe; 9. connecting frame; 10. servo motor; 11. ball screw; 12. slider; 13. reinforcement block; 14. guide frame; 15. bore searchlight; 16. connecting strip; 17. fixing ring; 18. extraction pipe; 19. guide groove; 20. fixing block; 21. right angle groove; 22. limiting groove; 23. inclined thread groove; 24. outer cover; 25. sealing cover; 26. positioning bolt rod; 27. filter cartridge; 28. filter screen; 29. ​​guide rod; 30. abutment strip; 31. plugging head. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1-Figure 10The present invention provides a technical solution: a structure and method for preventing pipeline blockage in coal mine gas extraction, comprising a base 1, a traveling wheel 2, a push rod 3, a gas storage tank 4, a connecting block 5, an extraction pump 6, a connecting pipe 7, an exhaust pipe 8, a connecting frame 9, a servo motor 10, a ball screw 11, a slider 12, a reinforcing block 13, a guide frame 14, a hole search light 15, a connecting strip 16, a fixing ring 17, an extraction pipe 18, a guide groove 19, a fixing block 20, a right-angle groove 21, a limiting groove 22, an inclined thread groove 23, an outer cover 24, a sealing cover 25, a positioning bolt rod 26, a filter cartridge 27, a filter screen 28, a guide rod 29, abutting strips 30 and a plugging head 31. A gas storage tank 4 is installed above the base 1, a traveling wheel 2 is installed below the base 1, and a traveling wheel 2 is installed below the base 1. There are four wheels 2, and the traveling wheels 2 are distributed in a rectangular structure. A push rod 3 is installed on the upper right side of the base 1. The traveling wheel 2 is used to facilitate the movement of the device. The device is pushed to the position where gas needs to be extracted through the traveling wheel 2 and the push rod 3, and a connecting block 5 is installed on the left side of the gas storage tank 4. An extraction pump 6 is installed above the connecting block 5, and a connecting pipe 7 and an exhaust pipe 8 are installed on the left and right sides of the extraction pump 6 respectively. The connecting pipe 7 is designed with a retractable structure. The connecting pipe 7 is connected to the extraction pipe 18, and the exhaust pipe 8 is connected to the inside of the gas storage tank 4. The extraction pump 6 is started, and the extraction pump 6 extracts the gas in the borehole through the connecting pipe 7 and the extraction pipe 18. When the gas passes through the extraction pipe 18, it can pass through the filter cartridge 27 and the filter screen 28 in sequence to remove impurities in the gas. The gas is filtered, and the impurities in the filter cartridge 27 can fall into the interior of the filter cartridge 27, thereby preventing the impurities in the gas from causing blockage of the connecting pipe 7 and the extraction pipe 18, and then the extracted gas is transported to the gas storage tank 4 through the exhaust pipe 8. A connecting frame 9 is installed above the gas storage tank 4, and a servo motor 10 is installed above the connecting frame 9, and a ball screw 11 is installed below the servo motor 10 through an output shaft, a slider 12 is installed on the ball screw 11, and a reinforcement block 13 is installed on the left side of the slider 12, a guide frame 14 is installed on the left side of the gas storage tank 4, and the guide frame 14 runs through the reinforcement block 13, the reinforcement block 13 is slidably connected to the guide frame 14, and the guide frame 14 is connected to the slider 12 through a bearing seat, and when the ball screw 11 rotates The ball screw 11 drives the slider 12 to move up and down, and the slider 12 drives the extraction tube 18 to move up and down through the reinforcement block 13, the connecting strip 16 and the fixing ring 17. The reinforcement block 13 moves up and down along the guide frame 14, so that the extraction tube 18 moves up and down more stably and will not deviate. A hole search light 15 is installed on the left side of the reinforcement block 13. Two hole search lights 15 are provided. The filter cartridge 27 can be abutted against the right-angle groove 21. The hole search light 15 is convenient for observing the hole condition of the borehole, which is convenient for advancing the extraction of gas. When installing the filter cartridge 27, the upper end of the filter cartridge 27 can be clamped with the right-angle groove 21 in the extraction tube 18, which is convenient for the installation of the filter cartridge 27. A fixing ring 17 is installed on the left side of the reinforcement block 13 through the connecting strip 16.A pumping tube 18 is installed on the fixing ring 17.

[0050] A guide groove 19 is provided on the left side of the extraction tube 18, a fixing block 20 is installed on the inner upper surface of the extraction tube 18, and a right-angle groove 21 is provided on the inner upper surface of the extraction tube 18, a limiting groove 22 and an inclined thread groove 23 are provided inside the fixing block 20, an outer cover 24 is installed below the extraction tube 18, and a sealing cover 25 is provided on the outer cover 24, and a positioning bolt rod 26 is passed through the sealing cover 25, and the positioning bolt rod 26 is threadedly connected with the inclined thread groove 23, and the inclined thread groove 23 is threadedly connected with the inclined thread groove 23. The groove 23 is connected to the limiting groove 22. When the filter cartridge 27 and the filter screen 28 need to be cleaned, the positioning bolt rod 26 can be rotated to disengage the positioning bolt rod 26 from the inclined thread groove 23. At this time, the positioning bolt rod 26 is away from the abutment bar 30, and the extrusion limit of the abutment bar 30 is released. At this time, the sealing cover 25 is removed, and the filter cartridge 27 can be removed. At the same time, the filter screen 28 on the left side can be directly pulled out to the left, and the removal of the filter cartridge 27 and the filter screen 28 is completed at the same time. A rubber sealing block is arranged, a positioning bolt rod 26 passes through the sealing cover 25, and a limiting nut is arranged on the positioning bolt rod 26. The sealing cover 25 seals the outer cover 24 to prevent gas leakage inside the extraction pipe 18. A filter cartridge 27 is arranged inside the extraction pipe 18. The filter cartridge 27 is designed with an inclined structure inside the extraction pipe 18, and the positioning bolt rod 26 passes through the filter cartridge 27. When installing the filter cartridge 27 and the filter screen 28, the filter cartridge 27 and the filter screen 28 are inserted into the interior of the extraction pipe 18. The guide rod 29 on the filter screen 28 abuts against the guide groove 19 on the extraction tube 18, so that the abutment strip 30 on the filter screen 28 is clamped in the limiting groove 22, and then the positioning bolt rod 26 is passed into the interior of the extraction tube 18 along the hole grooves on the sealing cover 25 and the filter cartridge 27, and connected with the inclined threaded groove 23 on the fixing block 20. At the same time, the positioning bolt rod 26 abuts against the abutment strip 30 to complete the fixation of the abutment strip 30, thereby simultaneously completing the fixation of the filter screen 28 and the filter cartridge 27.

[0051] A filter screen 28 is provided at the left end of the extraction tube 18, and a guide rod 29 and an abutment strip 30 are installed on the right side of the filter screen 28. Two guide rods 29 are provided, and the guide rods 29 can abut against the inside of the guide groove 19 on the extraction tube 18, and the abutment strip 30 can abut against the inside of the limiting groove 22 on the fixed block 20. The guide rod 29 on the filter screen 28 abuts against the guide groove 19 on the extraction tube 18, guiding the abutment strip 30 on the filter screen 28, so that the abutment strip 30 is clamped in the limiting groove 22, and the outer surface of the extraction tube 18 is threadedly connected with a plugging head 31.

[0052] The specific method of use includes the following steps:

[0053] S1. Drill the location for gas extraction in advance, push the device to the location where gas extraction is required through the traveling wheel 2 and the push rod 3, align the extraction tube 18 with the location of the drill hole, and if the extraction tube 18 is at a different height from the location of the drill hole, start the servo motor 10, the servo motor 10 drives the ball screw 11 to rotate through the output shaft, the ball screw 11 drives the slider 12 to move up and down, the slider 12 drives the extraction tube 18 to move up and down through the reinforcing block 13, the connecting bar 16 and the fixing ring 17, and aligns the extraction tube 18 with the drill hole location;

[0054] S2, rotating the plugging head 31, making the plugging head 31 contact the surface of the borehole, and using the sealing gasket on the surface of the plugging head 31 to seal the gas during extraction, thereby preventing gas from overflowing and causing a major safety hazard;

[0055] S3, start the extraction pump 6, the extraction pump 6 extracts the gas in the borehole through the connecting pipe 7 and the extraction pipe 18, when the gas passes through the extraction pipe 18, it can pass through the filter cartridge 27 and the filter screen 28 in sequence, filter the impurities in the gas, and the impurities in the filter cartridge 27 can fall into the inside of the filter cartridge 27, so as to prevent the impurities in the gas from causing the blockage of the connecting pipe 7 and the extraction pipe 18, and then the extracted gas is transported to the gas storage tank 4 through the exhaust pipe 8;

[0056] S4. When it is necessary to clean the filter cartridge 27 and the filter screen 28, the positioning bolt rod 26 can be rotated to disengage the positioning bolt rod 26 from the inclined thread groove 23. At this time, the positioning bolt rod 26 is away from the abutment bar 30, and the extrusion limit of the abutment bar 30 is released. At this time, the sealing cover 25 can be removed to remove the filter cartridge 27, and the filter screen 28 on the left side can be directly pulled out to the left. At the same time, the removal of the filter cartridge 27 and the filter screen 28 is completed. When installing the filter cartridge 27 and the filter screen 28, insert the filter cartridge 27 and the filter screen 28 into the filter cartridge 27 and the filter screen 28. The guide rod 29 on the filter screen 28 is abutted against the guide groove 19 on the extraction tube 18, so that the abutment strip 30 on the filter screen 28 is clamped in the limit groove 22, and then the positioning bolt rod 26 is passed into the interior of the extraction tube 18 along the hole grooves on the sealing cover 25 and the filter cartridge 27, and connected with the inclined threaded groove 23 on the fixing block 20, and at the same time, the positioning bolt rod 26 is abutted against the abutment strip 30 to complete the fixation of the abutment strip 30, thereby completing the fixation of the filter screen 28 and the filter cartridge 27 at the same time.

[0057] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for preventing pipeline blockage in coal mine gas extraction, comprising a base (1) and an extraction pipe (18), characterized in that: A gas storage tank (4) is installed above the base (1), and a connecting block (5) is installed on the left side of the gas storage tank (4), an extraction pump (6) is installed above the connecting block (5), and a connecting pipe (7) and an exhaust pipe (8) are installed on the left and right sides of the extraction pump (6), respectively; a connecting frame (9) is installed above the gas storage tank (4), a servo motor (10) is installed above the connecting frame (9), and a ball screw (11) is installed below the servo motor (10) through an output shaft, a slider (12) is installed on the ball screw (11), and a reinforcing block (13) is installed on the left side of the slider (12), a hole searchlight (15) is installed on the left side of the reinforcing block (13), a fixing ring (17) is installed on the left side of the reinforcing block (13) through a connecting strip (16), and an extraction pipe (18) is installed on the fixing ring (17); A guide groove (19) is provided on the left side of the extraction tube (18); a fixing block (20) is installed on the inner upper surface of the extraction tube (18); a right-angle groove (21) is provided on the inner upper surface of the extraction tube (18); a limiting groove (22) and an inclined thread groove (23) are provided inside the fixing block (20); an outer cover (24) is installed below the extraction tube (18); a sealing cover (25) is provided on the outer cover (24); a positioning bolt rod (26) passes through the sealing cover (25); and a filter cartridge (27) is provided inside the extraction tube (18); A filter screen (28) is provided at the left end of the extraction tube (18), and a guide rod (29) and an abutment bar (30) are installed on the right side of the filter screen (28). A plugging head (31) is threadedly connected to the outer surface of the extraction tube (18).

2. The pipeline blockage prevention structure for coal mine gas extraction according to claim 1 is characterized in that: Traveling wheels (2) are installed below the base (1), and four traveling wheels (2) are provided. The traveling wheels (2) are distributed in a rectangular structure, and a push rod (3) is installed on the upper right side of the base (1).

3. The pipeline blocking structure for preventing coal mine gas extraction according to claim 1 is characterized in that: The connecting pipe (7) is designed to be a retractable structure, the connecting pipe (7) is connected to the extraction pipe (18), and the exhaust pipe (8) is connected to the interior of the gas storage tank (4).

4. The pipeline blockage prevention structure for coal mine gas extraction according to claim 3 is characterized in that: A guide frame (14) is installed on the left side of the gas storage tank (4), and the guide frame (14) penetrates the reinforcing block (13). The reinforcing block (13) and the guide frame (14) are slidably connected, and the guide frame (14) and the slider (12) are connected via a bearing seat.

5. The pipeline blocking structure for preventing coal mine gas extraction according to claim 1 is characterized in that: The borehole probe lamps (15) are provided with two, and the filter cartridge (27) can abut against the right-angle groove (21).

6. The pipeline blocking structure for preventing coal mine gas extraction according to claim 1 is characterized in that: The positioning bolt rod (26) is threadedly connected with the inclined thread groove (23), and the inclined thread groove (23) is communicated with the limiting groove (22).

7. The pipeline blocking structure for preventing coal mine gas extraction according to claim 1 is characterized in that: The sealing cover (25) is provided with a rubber sealing block, a positioning bolt rod (26) passes through the sealing cover (25), and a limiting nut is provided on the positioning bolt rod (26).

8. The pipeline blockage prevention structure for coal mine gas extraction according to claim 1 is characterized in that: The filter cartridge (27) is designed to be an inclined structure in the extraction tube (18), and the positioning bolt rod (26) passes through the filter cartridge (27).

9. The pipeline blockage prevention structure for coal mine gas extraction according to claim 1 is characterized in that: Two guide rods (29) are provided, and the guide rods (29) can abut against the inside of the guide groove (19) on the extraction tube (18), and the abutment bar (30) can abut against the inside of the limit groove (22) on the fixed block (20).

10. The method for using the pipeline blockage prevention structure for coal mine gas extraction according to claim 1, characterized in that: The method of use specifically comprises the following steps: S1. Drill a hole at the location where gas is to be extracted in advance, push the device to the location where gas needs to be extracted through the traveling wheel (2) and the push rod (3), align the extraction pipe (18) with the location of the drill hole, and if the extraction pipe (18) and the location of the drill hole are at different heights, start the servo motor (10), the servo motor (10) drives the ball screw (11) to rotate through the output shaft, the ball screw (11) drives the slider (12) to move up and down, and the slider (12) drives the extraction pipe (18) to move up and down through the reinforcing block (13), the connecting strip (16) and the fixing ring (17), so as to align the extraction pipe (18) with the location of the drill hole; S2, rotating the plugging head (31) to make the plugging head (31) contact the surface of the borehole, so that the sealing pad on the surface of the plugging head (31) plays a sealing role when extracting gas, thereby preventing gas from overflowing and causing a major safety hazard; S3, starting the extraction pump (6), the extraction pump (6) extracts the gas in the borehole through the connecting pipe (7) and the extraction pipe (18), and when the gas passes through the extraction pipe (18), it can pass through the filter cartridge (27) and the filter net (28) in sequence to filter the impurities in the gas, and the impurities in the filter cartridge (27) can fall into the interior of the filter cartridge (27), thereby preventing the impurities in the gas from causing the blockage of the connecting pipe (7) and the extraction pipe (18), and then the extracted gas is transported to the gas storage tank (4) through the exhaust pipe (8); S4. When it is necessary to clean the filter cartridge (27) and the filter screen (28), the positioning bolt rod (26) can be rotated to disengage the positioning bolt rod (26) from the inclined thread groove (23). At this time, the positioning bolt rod (26) is away from the abutment bar (30), and the extrusion limit of the abutment bar (30) is released. At this time, the sealing cover (25) is removed, and the filter cartridge (27) can be removed. At the same time, the filter screen (28) on the left side can be directly pulled out to the left, and the removal of the filter cartridge (27) and the filter screen (28) is completed at the same time. When installing the filter cartridge (27) and the filter screen (28), the filter cartridge (27) and the filter screen (28) are inserted into the drawer. Inside the extraction tube (18), the guide rod (29) on the filter screen (28) abuts against the guide groove (19) on the extraction tube (18), so that the abutment strip (30) on the filter screen (28) is clamped in the limit groove (22), and then the positioning bolt rod (26) is passed into the interior of the extraction tube (18) along the hole grooves on the sealing cover (25) and the filter cartridge (27), and connected with the inclined thread groove (23) on the fixing block (20), and at the same time, the positioning bolt rod (26) abuts against the abutment strip (30), completing the fixing of the abutment strip (30), thereby simultaneously completing the fixing of the filter screen (28) and the filter cartridge (27).

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