A sealing device for gas control

Abstract

This utility model relates to the field of gas control technology, specifically a sealing device for gas control. It includes an extraction pipe with a sealing plug fixedly fitted to its outer side. The sealing plug has a frustum-shaped structure, and the gap between the sealing plug and the extraction hole is sealed with silicone sealant. A first airbag sleeve, a second airbag sleeve, and a third airbag sleeve are also fixedly fitted to the outer side of the extraction pipe, arranged sequentially from top to bottom. The frustum-shaped sealing plug, combined with cured silicone sealant, forms a basic seal. Simultaneously, three independently controllable aramid-reinforced rubber airbags are sequentially inflated, constructing a multi-level progressive sealing barrier within the extraction hole. This structure significantly improves adaptability to gas pressure fluctuations and overall sealing strength. Combined with high-pressure resistant materials, it effectively ensures the sealing reliability during the extraction of high-gas-pressure coal seams, greatly reducing the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of gas control technology, specifically to a sealing device for gas control. Background Technology

[0002] Coal mine gas is one of the main hazards threatening coal mine safety. To eliminate the gas threat during fully mechanized coal mining, pre-drainage methods are generally used to control coal seam gas. For gas drainage, it is generally necessary to seal the wellhead and the drainage pipe during the drilling process to prevent gas leakage and potential safety hazards.

[0003] Application number CN202320157452.5 discloses a sealing device for gas control. This device uses an external air source to inflate a high-pressure rubber expansion hose through an air inlet pipe. After the high-pressure rubber expansion hose expands, it blocks the gas extraction hole, thereby completing the sealing operation of the gas extraction hole. At the same time, a sealing cover plate is set, and bolts and sealing gaskets are assembled to ensure a sealed installation between the top surface of the device and the ground, further improving the sealing performance of the extraction. In addition, the positioning plate firmly fixes the pipe body inside the extraction hole to prevent it from shaking.

[0004] However, this device only uses a single airbag to seal the opening, along with a sealing gasket and a sealing cap. For coal seams with large fluctuations in gas pressure, it is difficult to provide a stable and sufficient sealing force, and cannot effectively prevent gas leakage. It is also difficult to meet the requirements of high sealing performance and high reliability of gas drainage sealing in coal mine safety production. Therefore, a sealing device for gas control is proposed. Utility Model Content

[0005] The main objective of this invention is to provide a sealing device for gas control, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A sealing device for gas control includes an extraction pipe, a sealing plug fixedly sleeved on the outside of the extraction pipe, the sealing plug having a frustum-shaped structure, the gap between the sealing plug and the extraction hole being sealed with silicone sealant, a top plate fixedly connected to the top of the sealing plug, and a first airbag sleeve, a second airbag sleeve, and a third airbag sleeve fixedly sleeved on the outside of the extraction pipe, the first airbag sleeve, the second airbag sleeve, and the third airbag sleeve being arranged sequentially from top to bottom;

[0008] The first airbag is fixedly sleeved on the outer side of the first airbag sleeve, and the first airbag is connected to the inside of the first trachea through the first air outlet. The second airbag is fixedly sleeved on the outer side of the second airbag sleeve, and the second airbag is connected to the inside of the second trachea through the second air outlet. The third airbag is fixedly sleeved on the outer side of the third airbag sleeve, and the third airbag is connected to the inside of the third trachea through the third air outlet.

[0009] Specifically, the bottom end of the first air tube is inserted into the inside of the first airbag sleeve through a sealing plug and is sealed and connected to the first air outlet, and the top end of the first air tube is located above the top plate.

[0010] Specifically, the bottom end of the second air tube passes through the sealing plug and the first airbag sleeve and is fixedly inserted into the inside of the second airbag sleeve. The bottom end of the second air tube is sealed and connected to the second air outlet and is internally connected. The top end of the second air tube is located above the top plate.

[0011] Specifically, the bottom end of the third air tube passes through the sealing plug, the first airbag sleeve, and the second airbag sleeve and is fixedly inserted into the inside of the third airbag sleeve. The bottom end of the third air tube is sealed and connected to the third air outlet and is internally connected. The top end of the third air tube is located above the top plate.

[0012] Specifically, valves are fitted onto the outer sides of the first, second, and third trachea.

[0013] Specifically, a fixing rod is inserted through the interior of the top plate, and multiple fixing rods are provided.

[0014] By adopting the above technical solution

[0015] The beneficial effects of this utility model are:

[0016] The gas control sealing device described in this utility model uses a frustum-shaped sealing plug combined with cured glass glue to form a basic seal. At the same time, three layers of independently controllable aramid-reinforced rubber airbags are sequentially inflated to construct a multi-level progressive sealing barrier within the extraction hole. This structure significantly improves the adaptability to gas pressure fluctuations and the overall sealing strength. Combined with high-pressure resistant materials, it effectively ensures the sealing reliability during the extraction process of high-gas-pressure coal seams and greatly reduces the risk of leakage. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the planar structure of the present invention;

[0021] In the diagram: 1. Fixed insertion rod; 2. Top plate; 3. Suction pipe; 4. Valve; 5. Sealing plug; 6. First air inlet pipe; 7. First air outlet; 8. First airbag sleeve; 9. Second airbag sleeve; 10. Second air outlet; 11. Second air pipe; 12. Third airbag sleeve; 13. Third air outlet; 14. Third air pipe; 15. Silicone sealant; 16. Third airbag; 17. Second airbag; 18. First airbag. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] As one embodiment of this utility model, such as Figures 1-3 As shown, the gas control sealing device of this utility model includes an extraction pipe 3, a sealing plug 5 fixedly sleeved on the outside of the extraction pipe 3, the sealing plug 5 is arranged in a frustum shape, the gap between the sealing plug 5 and the extraction hole is sealed with glass glue 15, the top of the sealing plug 5 is fixedly connected to a top plate 2, and a first airbag sleeve 8, a second airbag sleeve 9, and a third airbag sleeve 12 are also fixedly sleeved on the outside of the extraction pipe 3, the first airbag sleeve 8, the second airbag sleeve 9, and the third airbag sleeve 12 are arranged in order from top to bottom;

[0024] The first airbag 18 is fixedly sleeved on the outer side of the first airbag sleeve 8. The first airbag 18 is connected to the interior of the first air tube 6 through the first air outlet 7. The second airbag 17 is fixedly sleeved on the outer side of the second airbag sleeve 9. The second airbag 17 is connected to the interior of the second air tube 11 through the second air outlet 10. The third airbag 16 is fixedly sleeved on the outer side of the third airbag sleeve 12. The third airbag 16 is connected to the interior of the third air tube 14 through the third air outlet 13.

[0025] In use, the extraction pipe 3 with the sealing plug 5 is inserted into the extraction hole. The frustum-shaped sealing plug 5 will form a tight fit with the hole wall as the insertion depth increases. At this time, glass glue 15 is injected into the gap between the sealing plug 5 and the extraction hole. The fluidity of the glass glue fills the irregular gaps. After it cures, it forms a preliminary sealing barrier, reducing the possibility of gas leakage directly from the hole. Then, by inflating the first airbag 18, the second airbag 17, and the third airbag 16, the three airbags seal the extraction hole, forming a multi-layer sealing structure.

[0026] It should be noted that the three-layer airbag can be made of aramid-reinforced rubber composite material. Aramid fibers possess excellent properties such as high strength, high modulus, high temperature resistance, and chemical corrosion resistance. By combining aramid fibers with rubber, an aramid-reinforced rubber composite material is created for use in airbags. The aramid fibers effectively enhance the mechanical properties of the rubber, making it less prone to deformation and rupture under high gas pressure, thus improving the airbag's pressure resistance. Simultaneously, combined with the good elasticity and sealing properties of rubber, it ensures that the airbag fits tightly against the extraction hole wall after inflation, maintaining a highly efficient seal.

[0027] The present invention also includes that the bottom end of the first air tube 6 passes through the sealing plug 5 and is fixedly inserted into the inside of the first airbag sleeve 8 and is sealed and connected to the first air outlet 7 and internally connected, and the top end of the first air tube 6 is located above the top plate 2.

[0028] The present invention also includes that the bottom end of the second air tube 11 passes through the sealing plug 5 and the first airbag sleeve 8 and is fixedly inserted into the inside of the second airbag sleeve 9, the bottom end of the second air tube 11 is sealed and connected to the second air outlet 10 and communicates internally, and the top end of the second air tube 11 is located above the top plate 2.

[0029] The present invention also includes that the bottom end of the third air tube 14 passes through the sealing plug 5, the first airbag sleeve 8, and the second airbag sleeve 9 and is fixedly inserted into the interior of the third airbag sleeve 12; the bottom end of the third air tube 14 is sealed and connected to the third air outlet 13 and communicates internally; and the top end of the third air tube 14 is located above the top plate 2.

[0030] In use, the top of the first air pipe 6 is connected to an inflation device (such as a manual air pump or a small air compressor). After opening valve 4, gas flows downward along the air pipe. Since the bottom of the first air pipe 6 is sealed to the first air outlet 7, gas can only enter the first air bladder 18 through the first air outlet 7. As gas is continuously injected, the first air bladder 18 gradually expands and adheres tightly to the inner wall of the extraction hole, forming the first sealing line, mainly blocking any possible cracks or channels above the sealing block 5. The second air pipe 11 and the third air pipe 14 are inflated using the same operation for the second air bladder 17 and the third air bladder 16.

[0031] This utility model also includes valves 4 sleeved on the outer sides of the first air pipe 6, the second air pipe 11, and the third air pipe 14.

[0032] When in use, valve 4 is easy for on-site operators to open and close quickly. After inflation is complete, valve 4 is closed to prevent gas leakage from the airbag and thus prevent seal failure.

[0033] It should be noted that valve 4 is equipped with a pressure sensor that can detect the inflation pressure inside the three air bladders. A sensor mounting interface is added to the valve body of valve 4, and a threaded sealing connection is used to ensure that the original opening and closing function of valve 4 is not affected. The sensor probe should protrude from the inner wall of the flow channel and directly contact the gas medium to obtain accurate pressure data.

[0034] This utility model also includes a fixed insertion rod 1 inserted through the interior of the top plate 2, and the fixed insertion rod 1 has multiple rods.

[0035] When in use, the roof plate 2 serves as the supporting structure for the entire device. When the fixing rod 1 penetrates the roof plate 2 and is driven into the coal and rock mass around the extraction hole, it can provide a stable anchoring force.

[0036] In use, during the sealing operation, the extraction pipe 3 and its outer fixed sleeves, the first airbag sleeve 8, the second airbag sleeve 9, and the third airbag sleeve 12 are inserted into the gas extraction hole. Since the sealing sleeve 5 has a frustum-shaped structure, after insertion into the extraction hole, the gap between it and the extraction hole is filled with silicone sealant 15. After the sealant cures, it provides a preliminary seal. Subsequently, multiple fixing rods 1 inserted through the top plate 2 are used to stably fix the entire device on the plane of the extraction hole, preventing displacement during subsequent operations. Then, the first air pipe 6, the second air pipe 11, and the third air pipe 14 are inflated. Taking the first air tube 6 as an example, its bottom end is inserted through the sealing plug 5 and fixedly connected to the inside of the first airbag sleeve 8 and sealed with the first air outlet 7. When air is filled into the first air tube 6, the gas enters the first airbag 18 through the first air outlet 7, causing the first airbag 18 to expand, thereby tightly fitting the inner wall of the extraction hole and playing a sealing role. Similarly, when air is filled into the second air tube 11, the gas enters the second airbag 17 through the second air outlet 10, and the second airbag 17 expands to further strengthen the seal. When air is filled into the third air tube 14, the third airbag 16 expands through the third air outlet 13. The three layers of airbags seal the extraction hole, forming a multi-layer sealing structure to ensure that there is no leakage during gas extraction.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing device for gas control, comprising an extraction pipe (3), characterized in that, A sealing plug (5) is fixedly sleeved on the outside of the suction pipe (3). The sealing plug (5) is set in a frustum-shaped structure. The gap between the sealing plug (5) and the extraction hole is sealed with glass glue (15). A top plate (2) is fixedly connected to the top of the sealing plug (5). A first airbag sleeve (8), a second airbag sleeve (9), and a third airbag sleeve (12) are also fixedly sleeved on the outside of the suction pipe (3). The first airbag sleeve (8), the second airbag sleeve (9), and the third airbag sleeve (12) are arranged in order from top to bottom. The first airbag sleeve (8) is fixedly fitted with a first airbag (18), which is connected to the inside of the first trachea (6) through a first air outlet (7). The second airbag sleeve (9) is fixedly fitted with a second airbag (17), which is connected to the inside of the second trachea (11) through a second air outlet (10). The third airbag sleeve (12) is fixedly fitted with a third airbag (16), which is connected to the inside of the third trachea (14) through a third air outlet (13).

2. The sealing device for gas control according to claim 1, characterized in that, The bottom end of the first air tube (6) is inserted into the inside of the first airbag sleeve (8) through the sealing plug (5) and is sealed and connected to the first air outlet (7) and internally connected. The top end of the first air tube (6) is located above the top plate (2).

3. A sealing device for gas control according to claim 1, characterized in that, The bottom end of the second air tube (11) passes through the sealing plug (5) and the first airbag sleeve (8) and is fixedly inserted into the inside of the second airbag sleeve (9). The bottom end of the second air tube (11) is sealed and connected to the second air outlet (10) and communicates internally. The top end of the second air tube (11) is located above the top plate (2).

4. A sealing device for gas control according to claim 1, characterized in that, The bottom end of the third air tube (14) passes through the sealing plug (5), the first airbag sleeve (8), and the second airbag sleeve (9) and is fixedly inserted into the inside of the third airbag sleeve (12). The bottom end of the third air tube (14) is sealed and connected to the third air outlet (13) and communicates internally. The top end of the third air tube (14) is located above the top plate (2).

5. A sealing device for gas control according to claim 1, characterized in that, A valve (4) is fitted on the outside of the first air pipe (6), the second air pipe (11), and the third air pipe (14).

6. A sealing device for gas control according to claim 1, characterized in that, The top plate (2) is internally connected to a fixed rod (1), and there are multiple fixed rods (1).

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