A leak-proof gas extraction device

Abstract

The utility model provides a leakage-proof gas extraction device, which belongs to the technical field of coal mining. The leakage-proof gas extraction device includes an extraction tube, an air bag and a sealing mechanism, wherein the extraction tube is long enough to be suitable for the depth of the hole; the air bag is arranged on the outside of the extraction tube; the sealing mechanism is located outside the extraction tube, and includes a pressing plate and a first sealing ring, wherein the first sealing ring is fixedly connected to the bottom of the pressing plate, and the first sealing ring is used for secondary sealing of the hole, wherein the pressing plate can squeeze the first sealing ring so that it fits tightly with the surface of the hole, and the pressing plate can be fixed at the hole, and the first sealing ring under the pressing plate is tightly attached to the ground at the hole by sliding and squeezing the pressing plate, and then the handle is pressed so that the four fixing rods slide downward and are inserted between the ground, and the pressing plate and the first sealing ring are fixed, and the secondary sealing ability is provided, and the sealing effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, and in particular to a leakage-proof gas extraction device. Background Art

[0002] Coal mine gas refers to natural gas, a large amount of gas generated by plants in the process of coal formation. Coal mine gas, also known as coalbed methane, is humus-type organic matter that is decomposed by bacteria to generate gas. Later, with the increase of sediment burial depth, over a long geological period, the coal seam is subjected to high temperature and high pressure and enters the carbonization and metamorphism stage of coal. The volatile matter in the coal decreases, and the fixed carbon increases, which generates a large amount of gas and stores it in the pores and cracks of the coal seam or rock formation. When mining the protective layer, the gas in the protected layer should be extracted at the same time. When mining the close protective layer, mining measures must be taken to prevent the gas in the initial decompression of the protected layer from protruding into the mining face of the protective layer and accidentally penetrating the coal seam. The gas extraction process is to first drill a mining hole on the ground, insert the extraction equipment into the mining hole to extract the gas.

[0003] After searching, a protective layer gas extraction device was disclosed in the Chinese Public Utility Model Patent Application No.: CN202320818818.9. By inserting the extraction tube into the mining hole and opening the air valve, the air bag can be inflated through the inflation tube. After inflation, the air valve is closed. After the air bag is inflated, the inner wall of the mining hole can be contacted, thereby sealing the extraction tube and the mining hole to prevent gas leakage. However, the interior of the hole is relatively complicated, and the air bag may not be able to fill the hole, that is, there will be a gap between the air bag and the hole, and some gas will escape, and the sealing effect is not good. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a leakage-proof gas extraction device that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model provides a leakage-proof gas extraction device, comprising

[0006] A pumping tube, the pumping tube being long enough to fit the depth of the hole;

[0007] An air bag, wherein the air bag is arranged outside the extraction tube;

[0008] The sealing mechanism is located outside the extraction tube and includes a pressure plate and a first sealing ring. The first sealing ring is fixedly connected to the bottom of the pressure plate. The first sealing ring is used for secondary sealing of the hole. The pressure plate can squeeze the first sealing ring to make it fit tightly with the surface of the hole. The pressure plate can be fixed at the hole.

[0009] In a preferred solution, the pressing plate is slidably connected to the extraction tube, a fixing rod is slidably mounted on the pressing plate, the bottom of the fixing rod is configured to be conical, and a positioning bolt is provided on the pressing plate.

[0010] In a preferred solution, four fixing rods are provided, and the four fixing rods are arranged equidistantly in a ring shape, and a handle is fixedly connected to the top of the fixing rod.

[0011] In a preferred solution, a slide groove is provided inside the pressure plate, a limiting ring is fixedly connected to the outer wall of the fixing rod, the limiting ring is slidably connected to the inner wall of the slide groove, and a spring is fixedly connected between the limiting ring and the inner wall of the slide groove.

[0012] In a preferred solution, an air pipe is fixedly connected to the extraction tube, one end of the air pipe is connected to the air bag, and an air valve is provided on the air pipe.

[0013] In a preferred solution, a connecting pipe is provided at the bottom of the extraction pipe, a second sealing ring is fixedly connected to one end of the connecting pipe close to the extraction pipe, and a filter is fixedly connected to the inner wall of the connecting pipe.

[0014] In a preferred solution, a disassembly mechanism is provided between the connecting pipe and the extraction pipe, and the disassembly mechanism comprises a mounting block, the mounting block is fixedly connected to the outer surface of the connecting pipe, and a limiting groove is provided on the outer side of the mounting block.

[0015] In a preferred solution, a fixing block is fixedly connected to the outer surface of the extraction tube, a mounting groove is provided at the bottom of the fixing block, and the mounting block is plugged into the inner wall of the mounting groove.

[0016] In a preferred solution, the fixed block is threadedly connected to a threaded rod, one end of the threaded rod is fixedly connected to a knob, an anti-slip protrusion is provided on the knob, the threaded rod is rotatably connected to a limit block through a bearing, the limit block is plugged into the inner wall of the limit groove, a sliding groove is provided inside the fixed block, and the limit block is slidably connected to the inner wall of the sliding groove.

[0017] By sliding and squeezing the pressure plate, the first sealing ring under the pressure plate is made to fit tightly against the ground at the hole, and then the handle is pressed to make the four fixing rods slide downward and insert between the ground to fix the pressure plate and the first sealing ring, which has secondary sealing capability and better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the overall structure provided by the embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the cross-sectional structure of a pressing plate provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the cross-sectional structure of the connecting pipe provided in an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the cross-sectional structure of a fixing block provided in an embodiment of the utility model;

[0022] In the figure: 1. extraction tube; 2. sealing mechanism; 201. pressure plate; 202. first sealing ring; 203. fixing rod; 204. handle; 205. slide groove; 206. limiting ring; 207. spring; 3. disassembly mechanism; 301. mounting block; 302. limiting groove; 303. fixing block; 304. mounting groove; 305. threaded rod; 306. knob; 307. limiting block; 308. sliding groove; 4. air bag; 5. air pipe; 6. positioning bolt; 7. connecting pipe; 8. second sealing ring; 9. filter. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-Figure 4 The utility model provides a technical solution: a leakage-proof gas extraction device, comprising an extraction tube 1, an airbag 4 and a sealing mechanism 2, wherein the extraction tube 1 is long enough to be suitable for the depth of the hole; the airbag 4 is arranged on the outside of the extraction tube 1; the sealing mechanism 2 is located outside the extraction tube 1, and comprises a pressing plate 201 and a first sealing ring 202, wherein the first sealing ring 202 is fixedly connected to the bottom of the pressing plate 201, and the first sealing ring 202 is used for secondary sealing of the hole, the pressing plate 201 can squeeze the first sealing ring 202 to make it fit closely with the hole surface, the pressing plate 201 can be fixed at the hole, the airbag 4 is used for primary sealing, and the sealing mechanism 2 is used for secondary sealing;

[0025] The pressing plate 201 is slidably connected with the extraction pipe 1, and a fixing rod 203 is slidably installed on the pressing plate 201. The bottom of the fixing rod 203 is set to be conical. There are four fixing rods 203, and the four fixing rods 203 are arranged in a ring and equidistantly. The top of the fixing rod 203 is fixedly connected with a handle 204, and a positioning bolt 6 is arranged on the pressing plate 201. A sliding groove 205 is opened inside the pressing plate 201. The outer wall of the fixing rod 203 is fixedly connected with a limiting ring 206, and the limiting ring 206 is slidably connected to the inner wall of the sliding groove 205. A spring 207 is fixedly connected between the limiting ring 206 and the inner wall of the sliding groove 205. By sliding and The pressing plate 201 is squeezed so that the first sealing ring 202 below the pressing plate 201 is in close contact with the ground at the hole, and then the handle 204 is pressed so that the four fixing rods 203 slide downward and are inserted between the ground, fixing the pressing plate 201 and the first sealing ring 202, which has a secondary sealing ability and a better sealing effect. After the extraction is completed, the handle 204 is pulled upward to remove the fixing rod 203 from the ground. At this time, under the rebound effect of the spring 207, the fixing rod 203 is driven back to the initial position through the limit ring 206 to avoid the cone of the fixing rod 203 being exposed. When not in use, the pressing plate 201 is fixed with the positioning bolt 6;

[0026] The extraction tube 1 is fixedly connected with an air pipe 5, one end of which is connected with the air bag 4. The air pipe 5 is provided with an air valve. The air valve is opened to inflate the air bag 4 through the air pipe 5, so that the air bag 4 fits the inner wall of the hole and performs a primary seal.

[0027] A connecting pipe 7 is provided at the bottom of the extraction pipe 1. A second sealing ring 8 is fixedly connected to one end of the connecting pipe 7 close to the extraction pipe 1. A filter screen 9 is fixedly connected to the inner wall of the connecting pipe 7. The second sealing ring 8 is used to improve the sealing between the connecting pipe 7 and the extraction pipe 1. The filter screen 9 is used to filter out dust and particles to improve the purity of the extracted gas.

[0028] A disassembly mechanism 3 is provided between the connecting pipe 7 and the extraction pipe 1, and the disassembly mechanism 3 includes a mounting block 301, the mounting block 301 is fixedly connected to the outer surface of the connecting pipe 7, a limiting groove 302 is provided on the outer side of the mounting block 301, a fixing block 303 is fixedly connected to the outer surface of the extraction pipe 1, a mounting groove 304 is provided at the bottom of the fixing block 303, the mounting block 301 is plugged into the inner wall of the mounting groove 304, a threaded rod 305 is threadedly connected to the fixing block 303, one end of the threaded rod 305 is fixedly connected to a knob 306, an anti-slip protrusion is provided on the knob 306, and the threaded rod 305 is rotatably connected to the limiting block 3 through a bearing 07, the limit block 307 is plugged into the inner wall of the limit groove 302, and a sliding groove 308 is opened inside the fixed block 303. The limit block 307 is slidably connected to the inner wall of the sliding groove 308. By turning the knob 306, the knob 306 drives the threaded rod 305 to rotate outward, and the threaded rod 305 drives the limit block 307 to slide into the sliding groove 308, and then the limit block 307 is moved out of the limit groove 302, and the connecting pipe 7 can be pulled downward to pull the mounting block 301 out of the mounting groove 304. The connecting pipe 7 is disassembled to facilitate the flushing and cleaning of the filter screen 9 to prevent clogging by dust particles, thereby ensuring the efficiency of subsequent extraction.

[0029] Specifically, the working process or working principle of the leakage-proof gas extraction device is as follows: insert the extraction pipe 1 into the hole, first open the air valve to inflate the air bag 4 through the air pipe 5, so that the air bag 4 fits against the inner wall of the hole to perform a primary seal, then slide and squeeze the pressure plate 201, so that the first sealing ring 202 under the pressure plate 201 is in close contact with the ground at the hole, and then press the handle 204 to make the four fixing rods 203 slide downward and insert between the ground, fix the pressure plate 201 and the first sealing ring 202, and perform a secondary seal.

[0030] The gas is extracted through the connecting pipe 7 and the extraction pipe 1, and the dust and particulate matter mixed in the gas are blocked by the filter 9, which improves the purity of the extracted gas. After the extraction is completed, the knob 306 can be turned, and the knob 306 drives the threaded rod 305 to rotate outward, and the threaded rod 305 drives the limit block 307 to slide into the sliding groove 308, and then the limit block 307 is moved out of the limit groove 302, and the connecting pipe 7 can be pulled downward to pull the mounting block 301 out of the mounting groove 304, and the connecting pipe 7 can be disassembled to facilitate the flushing and cleaning of the filter 9 to prevent clogging by dust particles.

Claims

1. A gas extraction device with leakage prevention, characterized in that: include An extraction tube (1), the extraction tube (1) being long enough to fit the depth of the hole; An air bag (4), wherein the air bag (4) is arranged on the outside of the extraction tube (1); The sealing mechanism (2) is located outside the extraction tube (1), and comprises a pressure plate (201) and a first sealing ring (202). The first sealing ring (202) is fixedly connected to the bottom of the pressure plate (201). The first sealing ring (202) is used for secondary sealing of the hole. The pressure plate (201) can squeeze the first sealing ring (202) to make it fit tightly with the surface of the hole. The pressure plate (201) can be fixed at the hole.

2. A leak-proof gas extraction device according to claim 1, characterized in that: The pressing plate (201) is slidably connected to the extraction pipe (1), a fixing rod (203) is slidably mounted on the pressing plate (201), the bottom of the fixing rod (203) is configured to be conical, and a positioning bolt (6) is provided on the pressing plate (201).

3. A leak-proof gas extraction device according to claim 2, characterized in that: Four fixing rods (203) are provided, and the four fixing rods (203) are arranged in a ring shape and at equal intervals. A handle (204) is fixedly connected to the top of the fixing rod (203).

4. The anti-leakage gas extraction device according to claim 3, characterized in that: A slide groove (205) is provided inside the pressure plate (201); a limit ring (206) is fixedly connected to the outer wall of the fixing rod (203); the limit ring (206) is slidably connected to the inner wall of the slide groove (205); and a spring (207) is fixedly connected between the limit ring (206) and the inner wall of the slide groove (205).

5. The anti-leakage gas extraction device according to claim 4, characterized in that: The extraction tube (1) is fixedly connected to an air pipe (5), one end of the air pipe (5) is connected to the air bag (4), and an air valve is provided on the air pipe (5).

6. The anti-leakage gas extraction device according to claim 5, characterized in that: A connecting pipe (7) is provided at the bottom of the extraction pipe (1); a second sealing ring (8) is fixedly connected to one end of the connecting pipe (7) close to the extraction pipe (1); and a filter screen (9) is fixedly connected to the inner wall of the connecting pipe (7).

7. The anti-leakage gas extraction device according to claim 6, characterized in that: A disassembly mechanism (3) is provided between the connecting pipe (7) and the extraction pipe (1), and the disassembly mechanism (3) comprises a mounting block (301), the mounting block (301) is fixedly connected to the outer surface of the connecting pipe (7), and a limiting groove (302) is provided on the outer side of the mounting block (301).

8. The anti-leakage gas extraction device according to claim 7, characterized in that: A fixing block (303) is fixedly connected to the outer surface of the extraction tube (1), a mounting groove (304) is provided at the bottom of the fixing block (303), and the mounting block (301) is plugged into the inner wall of the mounting groove (304).

9. The anti-leakage gas extraction device according to claim 8, characterized in that: The fixing block (303) is threadedly connected to a threaded rod (305), one end of the threaded rod (305) is fixedly connected to a knob (306), an anti-slip protrusion is provided on the knob (306), the threaded rod (305) is rotatably connected to a limit block (307) via a bearing, the limit block (307) is plugged into the inner wall of the limit groove (302), a sliding groove (308) is provided inside the fixing block (303), and the limit block (307) is slidably connected to the inner wall of the sliding groove (308).

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