Intelligent hole sealing device for gas extraction and using method thereof

Abstract

The invention discloses a gas extraction intelligent hole sealing device and a using method thereof. The gas extraction intelligent hole sealing device comprises a material injection pipe, a detection assembly is arranged between the material injection pipe and a feeding pipe, a supporting assembly is arranged outside the material injection pipe, a mounting sleeve is mounted between the material injection pipe and the feeding pipe, and a leather bag sleeve is mounted in the mounting sleeve. The protection assembly is installed in the leather bag sleeve, the pressure sensor is installed on one side of the installation sleeve, the interior of the feeding pipe, the interior of the leather bag sleeve and the interior of the material injection pipe form a mortar flowing channel, and the exterior of the leather bag sleeve and the interior of the installation sleeve form a water storage cavity. By means of the arrangement mode that the material injection pipe, the feeding pipe and the detection assembly are matched, when mortar flows among the material injection pipe, the feeding pipe and the leather bag sleeve, the mortar can extrude the leather bag sleeve, so that pressure is transmitted into water flow in the leather bag sleeve, and then the pressure sensor detects the pressure of the water flow; therefore, the pressure of the injected mortar can be indirectly detected.

Description

Technical Field

[0001] This invention relates to the field of sealing devices, and in particular to an intelligent sealing device for gas extraction and its usage method. Background Technology

[0002] Gas extraction refers to the process of controlling and utilizing gas generated in coal mines or other underground mining projects. Methane in coal mines is a flammable and explosive gas, mainly a mixture of gases produced during the decomposition of coal. It contains methane as the main component, as well as other gases such as ethane and propane. These gases form a mixture of flammable gases in coal mines.

[0003] When sealing gas extraction boreholes, mortar is usually injected directly into the borehole to seal it. During the mortar injection, the pressure of the mortar injection needs to be detected to determine the sealing status of the gas borehole. Pressure sensors are usually used to detect fluid pressure. However, when detecting mortar injection pressure, the flowing mortar can not only damage the pressure sensor but also block the sensor's detection inlet, thus affecting the detection of mortar injection pressure. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent sealing device for gas extraction and its usage method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gas extraction intelligent sealing device, comprising an injection pipe, wherein a feed pipe is provided at the top of the injection pipe;

[0006] A detection component is provided between the injection pipe and the feed pipe, and a support component is provided outside the injection pipe. The detection component includes:

[0007] An installation sleeve is installed between the injection pipe and the feed pipe;

[0008] A bladder sleeve and a protective assembly, wherein the bladder sleeve is installed inside an installation sleeve, and the protective assembly is installed inside the bladder sleeve;

[0009] A pressure sensor is mounted on one side of the mounting sleeve.

[0010] Preferably, the inside of the feed pipe, the inside of the bladder sleeve, and the inside of the injection pipe form a mortar flow channel, the outside of the bladder sleeve and the inside of the mounting sleeve form a water storage chamber, a detection hole corresponding to a pressure sensor is opened on one side of the mounting sleeve, the pressure sensor is used to detect the water pressure inside the water storage chamber, and a threaded hole is opened on the front of the mounting sleeve, and a sealing bolt is threaded into the inner cavity of the threaded hole.

[0011] Preferably, the injection pipe and the feed pipe are both fixedly connected to a first flange plate at the end facing the mounting sleeve, and a second flange plate is provided at the end of the mounting sleeve. A fixing bolt is provided between the first flange plate and the second flange plate, and the end of the bladder sleeve is turned outward and pressed between the first flange plate and the second flange plate.

[0012] Preferably, the protective component includes:

[0013] A protective plate, the outer side of which is fitted against the inner wall of the bladder sleeve;

[0014] A positioning collar, wherein the positioning collar is located at the end of the protective plate, and the side of the positioning collar opposite to the positioning collar is in contact with the first flange plate;

[0015] A limiting collar is fitted onto the outside of the protective plate.

[0016] Preferably, the protective plate has a groove on the side facing the bladder sleeve, the limiting collar is engaged inside the groove, the outer wall of the limiting collar is in contact with the inner wall of the bladder sleeve, the end of the protective plate is fixedly connected to a limiting rod, the top of the positioning collar has a limiting hole, the outer wall of the limiting rod is slidably engaged with the inner cavity of the limiting hole, the first flange plate has a limiting groove on the side facing the protective plate, and the end of the outer wall of the limiting rod is slidably engaged with the inner cavity of the limiting groove.

[0017] Preferably, the support assembly includes:

[0018] The mounting collar and the fixing block are fixedly connected to the outside of the injection tube, and the mounting collar is slidably engaged with the outside of the injection tube by the fixing block;

[0019] A support plate and a foot plate, wherein the foot plate is fixedly connected to the end of the support plate, and one end of the outer wall of the support plate is engaged with a mounting collar and a fixing block;

[0020] A fixed bracket and a locking assembly are provided, wherein the fixed bracket is fixedly connected to the top of the support plate, and the locking assembly is engaged between the fixed bracket and the mounting collar.

[0021] Preferably, the inner wall of the mounting collar is provided with a groove, the outer wall of the fixing block is slidably sleeved with the inner cavity of the groove, the outer wall of the mounting collar is provided with a connecting groove, the inner cavity of the connecting groove is interconnected with the inner cavity of the groove, one end of the outer wall of the support plate is slidably sleeved with the inner cavity of the connecting groove, one end of the support plate is fixedly connected with a positioning block, one side of the fixing block is provided with a positioning groove, the outer wall of the positioning block is slidably engaged with the inner cavity of the positioning groove, and the end of the fixing bracket is fixedly connected with an arc plate, one side of the arc plate is in contact with the outer wall of the injection pipe.

[0022] Preferably, the locking component includes:

[0023] A support block, wherein the support block is disposed between the mounting collar and the fixing bracket;

[0024] A positioning rod and a limiting spring are provided. The positioning rod is engaged between the mounting collar and the support plate in a direction parallel to the axis of the injection tube, and the limiting spring is located at the top of the positioning rod.

[0025] A limiting block is fixedly connected to the top of the support block. The bottom of the fixed bracket is provided with a docking groove, and the outer wall of the limiting block is slidably engaged with the inner cavity of the docking groove.

[0026] Preferably, the top of the mounting collar has a connecting hole that matches the positioning rod, the top of the support plate has a locking hole, the bottom of the outer wall of the positioning rod is slidably engaged with the inner cavity of the locking hole, the bottom of the support block has a mounting groove, a connecting block is slidably sleeved inside the mounting groove, the bottom of the connecting block is fixedly connected to the positioning rod, the top of the inner wall of the mounting groove is symmetrically fixedly connected to guide rods, the outer wall of the guide rod is slidably sleeved with a limiting spring, the bottom of the outer wall of the guide rod is slidably inserted into the connecting block, a handle is fixedly connected to the side of the connecting block, a sliding hole is opened on the side of the support block, and the outer wall of the handle is slidably sleeved with the inner cavity of the sliding hole.

[0027] This invention also provides a method for using an intelligent sealing device for gas extraction, comprising the following specific steps:

[0028] Step 1: When sealing the gas extraction hole, first assemble the installation sleeve, bladder sleeve and protective components between the injection pipe and the feed pipe, then install the support components on the outside of the injection pipe and insert the injection pipe into the gas extraction hole;

[0029] Step 2: Inject mortar through the feed pipe. The mortar enters the inside of the bladder sleeve through the feed pipe, and then flows into the gas extraction hole through the injection pipe. When the mortar flows inside the bladder sleeve, it squeezes the inner wall of the bladder sleeve through the gap between the protective components, thereby transmitting the pressure of the mortar injection to the water flow between the bladder sleeve and the installation sleeve. The pressure sensor detects the pressure of the water flow between the bladder sleeve and the installation sleeve to obtain the pressure of the mortar injection.

[0030] Step 3: After the grouting and sealing of the gas extraction hole is completed, the injection pipe is pulled out from the gas extraction hole, the support components are disassembled, and the installation sleeve is separated from the feed pipe and injection pipe. The installation sleeve, bladder sleeve, protective components, feed pipe and injection pipe are disassembled and cleaned.

[0031] The technical effects and advantages of this invention are as follows:

[0032] (1) The present invention utilizes the combination of injection pipe, feed pipe and detection component. The detection component includes installation sleeve, pressure sensor, bladder sleeve, protective component and sealing bolt. When mortar flows between injection pipe, feed pipe and bladder sleeve, mortar can squeeze bladder sleeve, thereby transmitting pressure to the water flow inside bladder sleeve. Then the pressure sensor detects the pressure of the water flow, and can indirectly detect the pressure of the injected mortar.

[0033] (2) The present invention utilizes the combination of injection pipe and support component. The support component includes installation collar, fixing block, support plate, fixing bracket, locking component and positioning block. Under the action of locking component, support plate, positioning block, installation collar and fixing block can be interlocked with each other to support injection pipe and ensure stability of injection pipe when injecting mortar. Furthermore, by disassembling locking component, support plate, installation collar and fixing block can be disassembled to facilitate subsequent handling and transportation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 This is a schematic diagram of the internal structure of the mounting sleeve of the present invention.

[0036] Figure 3 This is a schematic diagram of the overall structure of the protective plate of the present invention.

[0037] Figure 4 This is a schematic diagram of the overall structure of the support component of the present invention.

[0038] Figure 5 This is a schematic diagram of the overall structure of the mounting collar of the present invention.

[0039] Figure 6This is a schematic diagram of the internal structure of the side of the mounting collar portion of the present invention.

[0040] Figure 7 This is a schematic diagram of the internal structure of the support block of the present invention.

[0041] In the diagram: 1. Injection pipe; 2. Feed pipe; 3. Detection assembly; 31. Mounting sleeve; 32. Pressure sensor; 33. Leather sleeve; 34. Protective assembly; 341. Protective plate; 342. Positioning collar; 343. Limiting collar; 344. Slot; 345. Limiting rod; 35. Sealing bolt; 36. First flange plate; 37. Second flange plate; 38. Fixing bolt; 4. Support assembly; 41. Mounting collar ; 411, Slot; 412, Connecting slot; 413, Connecting hole; 42, Fixing block; 43, Support plate; 44, Foot plate; 45, Fixing bracket; 46, Locking assembly; 461, Support block; 462, Positioning rod; 463, Limiting spring; 464, Limiting block; 465, Mounting slot; 466, Connecting block; 467, Guide rod; 468, Handle; 469, Sliding hole; 47, Positioning block; 48, Arc plate. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention provides, for example Figure 1-7 The intelligent sealing device for gas extraction shown includes an injection pipe 1, a feed pipe 2 at the top of the injection pipe 1, a detection component 3 between the injection pipe 1 and the feed pipe 2, and a support component 4 outside the injection pipe 1. The detection component 3 includes an installation sleeve 31, a bladder sleeve 33, a protective component 34, and a pressure sensor 32. The installation sleeve 31 is installed between the injection pipe 1 and the feed pipe 2, the bladder sleeve 33 is installed inside the installation sleeve 31, the protective component 34 is installed inside the bladder sleeve 33, and the pressure sensor 32 is installed on one side of the installation sleeve 31. When mortar flows between the feed pipe 2, the bladder sleeve 33, and the injection pipe 1, the mortar can transmit pressure between the bladder sleeve 33 and the installation sleeve 31. The pressure sensor 32 detects the pressure between the bladder sleeve 33 and the installation sleeve 31, thus indirectly obtaining the pressure during mortar injection.

[0044] Specifically, the interior of the feed pipe 2, the interior of the bladder sleeve 33, and the interior of the injection pipe 1 form a mortar flow channel. The exterior of the bladder sleeve 33 and the interior of the mounting sleeve 31 form a water storage chamber. A detection hole corresponding to the pressure sensor 32 is opened on one side of the mounting sleeve 31. The pressure sensor 32 is used to detect the water pressure inside the water storage chamber, so that the pressure inside the mortar flow channel is transmitted to the water flow inside the water storage chamber. The pressure sensor 32 can detect the pressure of the water flow inside the water storage chamber, and the water flow inside the water storage chamber is stable and will not damage the pressure sensor 32. A threaded hole is opened on the front of the mounting sleeve 31, and a sealing bolt 35 is threaded into the inner cavity of the threaded hole. After the bladder sleeve 33 and the protective component 34 are assembled, water can be injected into the water storage chamber through the threaded hole, and then the threaded hole is sealed with the sealing bolt 35. The injection pipe 1 and the feed pipe 2 are both fixedly connected to the end facing the mounting sleeve 31 with a first flange plate 36. The end of the mounting sleeve 31 is provided with a second flange plate 37. A fixing bolt 38 is provided between the first flange plate 36 and the second flange plate 37. The end of the bladder sleeve 33 is turned outward and pressed between the first flange plate 36 and the second flange plate 37. The first flange plate 36 and the second flange plate 37 can also fix the bladder sleeve 33. By separating the first flange plate 36 and the second flange plate 37, the bladder sleeve 33 can be disassembled and maintained.

[0045] Furthermore, the protective assembly 34 includes a protective plate 341, a positioning collar 342, and a limiting collar 343. The outer side of the protective plate 341 is fitted against the inner wall of the bladder sleeve 33. The positioning collar 342 is located at the end of the protective plate 341, and the side of the positioning collar 342 facing away from the positioning collar 342 is fitted against the first flange plate 36. The limiting collar 343 is sleeved on the outer side of the protective plate 341. A groove 344 is formed on the side of the protective plate 341 facing the bladder sleeve 33, and the limiting collar 343 is engaged inside the groove 344. The outer wall of the limiting collar 343 is fitted against the inner wall of the bladder sleeve 33. Multiple protective plates 341 and multiple limiting collars 343 can protect and limit the inner wall of the bladder sleeve 33, which can not only improve the stability of the shape of the bladder sleeve 33, but also reduce the damage to the bladder sleeve 33 caused by mortar flow, and prevent... There is a gap between the protective plate 341 and the limiting collar 343, so that the mortar can pass through the gap between the protective plate 341 and the limiting collar 343 to transmit pressure to the bladder sleeve 33. The end of the protective plate 341 is fixedly connected to the limiting rod 345. The top of the positioning collar 342 is provided with a limiting hole. The outer wall of the limiting rod 345 is slidably sleeved with the inner cavity of the limiting hole. The first flange plate 36 is provided with a limiting groove on the side facing the protective plate 341. The end of the outer wall of the limiting rod 345 is slidably engaged with the inner cavity of the limiting groove. The limiting rod 345 and the positioning collar 342 can improve the stability of the assembly of the protective plate 341 and the limiting collar 343. By disassembling the first flange plate 36 and the second flange plate 37, the positioning collar 342, multiple protective plates 341 and limiting collar 343 can be disassembled and cleaned to prevent mortar from solidifying on the outside and affecting its subsequent use.

[0046] Specifically, the support assembly 4 includes an installation collar 41, a fixing block 42, a support plate 43, a foot plate 44, a fixing bracket 45, and a locking assembly 46. The fixing block 42 is fixedly connected to the outside of the injection pipe 1. The installation collar 41 is slidably engaged with the outside of the injection pipe 1 through the fixing block 42. The foot plate 44 is fixedly connected to the end of the support plate 43. One end of the outer wall of the support plate 43 is engaged with the installation collar 41 and the fixing block 42, and the bottom of the foot plate 44 is at the same level as the bottom of the installation collar 41. Thus, when the injection pipe 1 is inserted into the gas extraction hole, the foot plate 44 and the installation collar 41 can limit the insertion depth of the injection pipe 1 and ensure the stability of the injection pipe 1 during injection, preventing the injection pipe 1 from tilting. The fixing bracket 45 is fixedly connected to the top of the support plate 43. The locking assembly 46 is engaged between the fixing bracket 45 and the installation collar 41. The inner wall of the installation collar 41 has an opening. The mounting plate 43 has a slot 411, and the outer wall of the fixing block 42 is slidably sleeved with the inner cavity of the slot 411. The outer wall of the mounting ring 41 has a connecting groove 412, and the inner cavity of the connecting groove 412 is connected to the inner cavity of the slot 411. One end of the outer wall of the support plate 43 is slidably sleeved with the inner cavity of the connecting groove 412. One end of the support plate 43 is fixedly connected with a positioning block 47. One side of the fixing block 42 has a positioning groove, and the outer wall of the positioning block 47 is slidably engaged with the inner cavity of the positioning groove. The support plate 43 can be engaged with the fixing block 42 through the positioning block 47, thereby ensuring the stability of the connection between the mounting ring 41 and the fixing block 42, that is, the stability of the mounting ring 41 installed outside the injection pipe 1. The end of the fixed bracket 45 is fixedly connected with an arc plate 48, and one side of the arc plate 48 is in contact with the outer wall of the injection pipe 1. The fixed bracket 45 and the arc plate 48 can improve the stability of the support plate 43 and the foot plate 44 relative to the injection pipe 1 when they are working.

[0047] In particular, the locking assembly 46 includes a support block 461, a positioning rod 462, a limiting spring 463, and a limiting block 464. The support block 461 is disposed between the mounting collar 41 and the fixed bracket 45. The positioning rod 462 is engaged between the mounting collar 41 and the support plate 43 along a direction parallel to the axis of the injection tube 1. The limiting spring 463 is disposed at the top of the positioning rod 462. The limiting block 464 is fixedly connected to the top of the support block 461. A mating groove is provided at the bottom of the fixed bracket 45. The outer wall of the limiting block 464 is connected to the inner wall of the mating groove. The cavity sliding engagement, with limiting block 464 improving the stability of the engagement between support block 461 and fixed bracket 45, features a connecting hole 413 at the top of mounting collar 41 that matches positioning rod 462. A locking hole is provided at the top of support plate 43. The bottom of the outer wall of positioning rod 462 slides into the inner cavity of the locking hole. Positioning rod 462 ensures the stability of the engagement between support plate 43 and mounting collar 41, thereby ensuring the stability of the engagement between positioning block 47 at the end of support plate 43 and fixed block 42, and thus ensuring the stability of the engagement between mounting collar 41 and support plate 45. Plate 43 is stably installed on the outside of injection pipe 1. A mounting groove 465 is provided at the bottom of support block 461. A connecting block 466 is slidably sleeved inside the mounting groove 465. The bottom of the connecting block 466 is fixedly connected to the positioning rod 462. Guide rods 467 are symmetrically fixedly connected to the top of the inner wall of the mounting groove 465. The outer wall of the guide rod 467 is slidably sleeved with a limiting spring 463. The bottom of the outer wall of the guide rod 467 is slidably inserted into the connecting block 466, and the limiting spring 463 is located at the top of the connecting block 466. A handle 468 is fixedly connected to the side of the 6. A sliding hole 469 is opened on the side of the support block 461. The outer wall of the handle 468 is slidably sleeved with the inner cavity of the sliding hole 469. The handle 468 drives the connecting block 466 and the positioning rod 462 to rise, so that the positioning rod 462 is separated from the support plate 43 and the mounting collar 41. The support plate 43 can be slidably pulled out, and the support plate 43 drives the positioning block 47 to separate from the fixed block 42. The mounting collar 41 can be disassembled to facilitate the disassembly of the support assembly 4 outside the injection pipe 1.

[0048] This invention also provides a method for using an intelligent sealing device for gas extraction, comprising the following specific steps:

[0049] When sealing the gas extraction hole, first assemble the installation sleeve 31, the bladder sleeve 33 and the protective component 34 between the injection pipe 1 and the feed pipe 2, then install the support component 4 on the outside of the injection pipe 1 and insert the injection pipe 1 into the gas extraction hole.

[0050] Mortar is injected through the feed pipe 2 and enters the interior of the bladder sleeve 33 through the feed pipe 2. Then it flows into the gas extraction hole through the injection pipe 1. When the mortar flows inside the bladder sleeve 33, it squeezes the inner wall of the bladder sleeve 33 through the gap between the protective components 34, thereby transmitting the pressure of the mortar injection to the water flow between the bladder sleeve 33 and the mounting sleeve 31. The pressure sensor 32 detects the pressure of the water flow between the bladder sleeve 33 and the mounting sleeve 31 to obtain the pressure of the mortar injection.

[0051] After the grouting and sealing of the gas extraction hole is completed, the injection pipe 1 is pulled out from the gas extraction hole, the support assembly 4 is disassembled, and then the installation sleeve 31 is separated from the feed pipe 2 and the injection pipe 1. The installation sleeve 31, the bladder sleeve 33, the protective assembly 34, the feed pipe 2 and the injection pipe 1 are disassembled and cleaned.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas extraction intelligent sealing device, comprising an injection pipe (1), wherein a feed pipe (2) is provided at the top of the injection pipe (1); Its features are, A detection component (3) is provided between the injection pipe (1) and the feed pipe (2), and a support component (4) is provided outside the injection pipe (1). The detection component (3) includes: Installation sleeve (31) is installed between injection pipe (1) and feed pipe (2); A bladder sleeve (33) and a protective component (34), wherein the bladder sleeve (33) is installed inside the mounting sleeve (31) and the protective component (34) is installed inside the bladder sleeve (33); Pressure sensor (32) is mounted on one side of mounting sleeve (31).

2. The intelligent sealing device for gas extraction according to claim 1, characterized in that, The inside of the feed pipe (2), the inside of the bladder sleeve (33) and the inside of the injection pipe (1) form a mortar flow channel. The outside of the bladder sleeve (33) and the inside of the mounting sleeve (31) form a water storage chamber. A detection hole corresponding to the pressure sensor (32) is opened on one side of the mounting sleeve (31). The pressure sensor (32) is used to detect the water pressure inside the water storage chamber. A threaded hole is opened on the front of the mounting sleeve (31). A sealing bolt (35) is threaded into the inner cavity of the threaded hole.

3. The intelligent sealing device for gas extraction according to claim 2, characterized in that, The injection pipe (1) and the feed pipe (2) are both fixedly connected to the end of the mounting sleeve (31) with a first flange plate (36). The end of the mounting sleeve (31) is provided with a second flange plate (37). A fixing bolt (38) is provided between the first flange plate (36) and the second flange plate (37). The end of the bladder sleeve (33) is turned outward and pressed between the first flange plate (36) and the second flange plate (37).

4. The intelligent sealing device for gas extraction according to claim 3, characterized in that, The protective component (34) includes: The protective plate (341) is attached to the inner wall of the bladder sleeve (33); Positioning collar (342), the positioning collar (342) is located at the end of the protective plate (341), and the side of the positioning collar (342) facing away from the positioning collar (342) is in contact with the first flange plate (36); A limiting collar (343) is sleeved on the outside of the protective plate (341).

5. The intelligent sealing device for gas extraction according to claim 4, characterized in that, The protective plate (341) has a slot (344) on the side facing the bladder sleeve (33). The limiting collar (343) is engaged inside the slot (344). The outer wall of the limiting collar (343) is in contact with the inner wall of the bladder sleeve (33). A limiting rod (345) is fixedly connected to the end of the protective plate (341). A limiting hole is opened at the top of the positioning collar (342). The outer wall of the limiting rod (345) is slidably sleeved with the inner cavity of the limiting hole. A limiting groove is opened on the side of the first flange plate (36) facing the protective plate (341). The end of the outer wall of the limiting rod (345) is slidably engaged with the inner cavity of the limiting groove.

6. The intelligent sealing device for gas extraction according to claim 1, characterized in that, The support assembly (4) includes: The mounting collar (41) and the fixing block (42) are fixedly connected to the outside of the injection tube (1), and the mounting collar (41) is slidably engaged with the outside of the injection tube (1) through the fixing block (42); A support plate (43) and a foot plate (44), wherein the foot plate (44) is fixedly connected to the end of the support plate (43), and one end of the outer wall of the support plate (43) is engaged with the mounting collar (41) and the fixing block (42); A fixed bracket (45) and a locking assembly (46) are provided, wherein the fixed bracket (45) is fixedly connected to the top of the support plate (43), and the locking assembly (46) is engaged between the fixed bracket (45) and the mounting collar (41).

7. The intelligent sealing device for gas extraction according to claim 6, characterized in that, The inner wall of the mounting collar (41) is provided with a groove (411), the outer wall of the fixing block (42) is slidably sleeved with the inner cavity of the groove (411), the outer wall of the mounting collar (41) is provided with a connecting groove (412), the inner cavity of the connecting groove (412) is interconnected with the inner cavity of the groove (411), one end of the outer wall of the support plate (43) is slidably sleeved with the inner cavity of the connecting groove (412), one end of the support plate (43) is fixedly connected with a positioning block (47), one side of the fixing block (42) is provided with a positioning groove, the outer wall of the positioning block (47) is slidably snapped with the inner cavity of the positioning groove, the end of the fixing bracket (45) is fixedly connected with an arc plate (48), one side of the arc plate (48) is in contact with the outer wall of the injection pipe (1).

8. The intelligent sealing device for gas extraction according to claim 7, characterized in that, The locking component (46) includes: A support block (461) is disposed between the mounting collar (41) and the fixing bracket (45); The positioning rod (462) and the limiting spring (463) are provided. The positioning rod (462) is engaged between the mounting collar (41) and the support plate (43) in a direction parallel to the axis of the injection tube (1). The limiting spring (463) is provided at the top of the positioning rod (462). A limiting block (464) is fixedly connected to the top of the support block (461). The bottom of the fixed bracket (45) is provided with a docking groove, and the outer wall of the limiting block (464) is slidably engaged with the inner cavity of the docking groove.

9. The intelligent sealing device for gas extraction according to claim 8, characterized in that, The top of the mounting collar (41) has a connecting hole (413) that matches the positioning rod (462), and the top of the support plate (43) has a locking hole. The bottom of the outer wall of the positioning rod (462) is slidably engaged with the inner cavity of the locking hole. The bottom of the support block (461) has a mounting groove (465), and a connecting block (466) is slidably fitted inside the mounting groove (465). The bottom of the connecting block (466) is fixedly connected to the positioning rod (462). Guide rods (467) are symmetrically fixedly connected to the top of the inner wall of the mounting groove (465). The outer wall of the guide rod (467) is slidably sleeved with the limiting spring (463). The bottom of the outer wall of the guide rod (467) is slidably inserted and sleeved with the connecting block (466). A handle (468) is fixedly connected to the side of the connecting block (466). A sliding hole (469) is opened on the side of the support block (461). The outer wall of the handle (468) is slidably sleeved with the inner cavity of the sliding hole (469).

10. A method of using an intelligent sealing device for gas extraction according to any one of claims 1-9, characterized in that, The specific usage steps are as follows: Step 1: When sealing the gas extraction hole, first assemble the installation sleeve (31), the bladder sleeve (33) and the protective component (34) between the injection pipe (1) and the feed pipe (2), then install the support component (4) on the outside of the injection pipe (1) and insert the injection pipe (1) into the gas extraction hole; Step 2: Inject mortar through the feed pipe (2). The mortar enters the interior of the bladder sleeve (33) through the feed pipe (2) and then flows into the gas extraction hole through the injection pipe (1). When the mortar flows inside the bladder sleeve (33), the mortar squeezes the inner wall of the bladder sleeve (33) through the gap between the protective components (34), thereby transmitting the pressure of the mortar injection to the water flow between the bladder sleeve (33) and the installation sleeve (31). The pressure sensor (32) detects the pressure of the water flow between the bladder sleeve (33) and the installation sleeve (31) to obtain the pressure of the mortar injection. Step 3: After the grouting and sealing of the gas extraction hole is completed, the injection pipe (1) is pulled out from the gas extraction hole, the support assembly (4) is disassembled, and the installation sleeve (31) is separated from the feed pipe (2) and the injection pipe (1). The installation sleeve (31), the bladder sleeve (33), the protective assembly (34), the feed pipe (2) and the injection pipe (1) are disassembled and cleaned.

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