Quick plugging device for underground coal mine

Abstract

The invention discloses an underground coal mine quick plugging device, and particularly relates to the technical field of coal mine plugging, the underground coal mine quick plugging device comprises a counterweight plate, a pipe body is mounted on the rear side of the counterweight plate, an expansion belt sleeves the pipe body, a plurality of air holes used for communicating the expansion belt are formed in the outer part of the pipe body, a cavity is formed in the counterweight plate, and the expansion belt is arranged in the cavity. A connecting pipe communicating with the pipe body is installed in the cavity, and a second valve is installed outside the rear end of the connecting pipe. Two power pipes used for being communicated with the connecting pipe are arranged on the front side of the second valve. The first valve and the second valve are sequentially opened and closed, so that gas can be exhausted through the power pipe, the balance weight plate supported by the rolling wheels can be driven to move in the horizontally-arranged pipeline through pushing of the gas, then the gas is conveyed into the expansion belt, and the expansion belt is expanded to make contact with the inner wall of the pipeline; therefore, the expansion belt can be conveniently adjusted to a proper position for blocking treatment, and the expansion belt can adapt to pipelines arranged at different angles.

Description

Technical Field

[0001] This invention relates to the field of coal mine sealing technology, and more specifically to a rapid sealing device for underground coal mines. Background Technology

[0002] For the coal mining industry, pipelines are the core infrastructure for the efficient transportation of various media and energy. Given that coal mining depths typically reach hundreds of meters, the volume of pipelines used in this environment is considerable, and due to the depth effect, they must withstand high operating pressures, making leakage quite common. The traditional strategy for dealing with pipeline leaks is to isolate the leaking section from the entire pipeline system by closing the relevant valves, and then carry out maintenance work. However, this method has significant limitations. On the one hand, frequent valve operation can easily cause leaks such as water and air leaks in ordinary valves, increasing the complexity of maintenance work and incurring additional costs due to valve replacement. On the other hand, given the often long pipeline layout in mines, the time spent by construction personnel traveling between valves is considerable, failing to meet the need for rapid response. Furthermore, during on-site construction, if water accumulation in the pipeline affects welding or fusion processes, workers often use yellow mud for temporary sealing. However, it should be noted that yellow mud sealing is only suitable for short-term operations; after prolonged immersion in water, the structure of the yellow mud becomes loose, eventually leading to sealing failure.

[0003] As shown in the prior art published in CN217899231U, although this prior art utilizes the principle that polyurethane material expands radially after being compressed axially, and uses a driving bolt to continuously apply axial pressure to the polyurethane seal, the polyurethane seal will be squeezed radially against the pipe wall, thereby continuously increasing the friction and sealing tightness between the seal and the pipe wall, achieving a rapid sealing effect. This device has a simple structure, is easy to manufacture, can be reused multiple times, saves production costs, and improves sealing efficiency. However, this prior art has limited distance adjustment and cannot be adapted to long-distance sealing adjustments, resulting in certain limitations. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, this invention provides a rapid sealing device for underground coal mines. By sequentially opening and closing the first and second valves, gas can be discharged through the power pipe. The pushing of the gas can drive a counterweight plate supported by rollers to move inside the horizontally placed pipeline. By delivering the gas into the expansion band, the expansion band expands and contacts the inner wall of the pipeline, thereby facilitating the adjustment of the expansion band to a suitable position for sealing. It can also adapt to pipelines arranged at different angles, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid sealing device for underground coal mines, comprising a counterweight plate, a pipe body installed on the rear side of the counterweight plate, an expansion band sleeved on the outside of the pipe body, and multiple air holes for connecting the expansion band on the outside of the pipe body, a cavity inside the counterweight plate, a connecting pipe connected to the pipe body installed inside the cavity, and a second valve installed on the outside of the rear end of the connecting pipe;

[0006] The second valve has two power pipes for connecting the connecting pipe on its front side. The two power pipes are symmetrically distributed about the central axis of the connecting pipe, and the front side of the power pipe away from the connecting pipe passes through the counterweight plate and extends to the front side of the counterweight plate. The first valve is installed on the outside of the power pipe near the connecting pipe.

[0007] In a preferred embodiment, the front end of the connecting tube penetrates through the counterweight plate and extends to the front side of the counterweight plate. An assembly ring is sleeved on the outside of the connecting tube, and a hollow shell is sleeved on the outside of the assembly ring. Multiple sets of auxiliary components for enhancing stability are installed inside the hollow shell. The auxiliary components are assembled and fixed by the hollow shell and the assembly ring to ensure the stability of the auxiliary components.

[0008] In a preferred embodiment, each set of auxiliary components includes a cylindrical body installed outside the assembly ring, and the cylindrical body is located inside a hollow shell. The cylindrical body is equipped with a spring and a positioning plate. The positioning plate is located on the side of the spring away from the assembly ring, and an adjusting column is installed on the side of the positioning plate away from the spring. The end of the adjusting column away from the positioning plate passes through the cylindrical body and the hollow shell in sequence and extends to the outside of the hollow shell. A roller is installed on the outside of the end of the adjusting column away from the hollow shell. By utilizing the elasticity of the spring, the extension length of the adjusting column can be easily compressed and adjusted. This facilitates the assembly of the auxiliary components into pipelines of different specifications, and makes it easier to place the expansion band at the center of the pipeline, so that the expansion band can be subjected to balanced force and avoid damage caused by excessive local stress in the expansion band.

[0009] In a preferred embodiment, an adjusting ring is sleeved on the front end of the assembly ring. The adjusting ring and the assembly ring are movably connected by a bearing. A connecting rope is installed on the rear end of the adjusting ring on the side corresponding to the cylinder. The end of the connecting rope away from the adjusting ring passes through the hollow shell and the cylinder in sequence and is fixed together with the positioning plate. The spring is sleeved on the outside of the connecting rope. By pulling the connecting rope, the positioning plate is moved inward, and the positioning plate moves the adjusting column inward. This facilitates placing the overall structure inside the pipeline. Then, the spring's rebound force pushes the positioning plate and the adjusting column outward, and the roller on the adjusting column contacts the pipeline. This supports and limits the overall structure, ensuring the stability of the expansion band.

[0010] In a preferred embodiment, limiting rings are fitted on both the outer front end and the outer rear end of the pipe body, and the expansion band is disposed between the two limiting rings. By setting the two limiting rings, the expansion direction of the expansion band can be limited, thereby facilitating the expansion band to seal the pipeline.

[0011] In a preferred embodiment, through holes are provided on both sides of the hollow shell, and the through holes correspond to the positions of the power pipe. By providing through holes inside the hollow shell, the through holes do not affect the gas emission of the power pipe, ensuring the stability of the power pipe and preventing the hollow shell from affecting the performance of the power pipe.

[0012] In a preferred embodiment, the diameter of the positioning plate is equal to the inner diameter of the cylinder, and the diameter of the positioning plate is greater than the diameter of the adjusting column. By setting the diameter of the positioning plate to be greater than the diameter of the adjusting column, the positioning plate can limit the adjusting column and prevent the adjusting column from detaching from the cylinder during the displacement process, thereby ensuring the stability of the adjusting column when it contracts.

[0013] In a preferred embodiment, a fixing ring is installed on the outer side of the front end of the connecting pipe, and a detachable gas supply pipe is installed inside the fixing ring. The gas supply pipe is assembled and fixed by the fixing ring, so that the gas supply pipe can deliver gas to the connecting pipe and the inside of the pipe body, thereby improving the convenience of gas delivery.

[0014] In a preferred embodiment, an installation ring is threadedly connected to the front end of the power pipe, and a dustproof net is installed inside the installation ring. The dustproof net can block external dust and other impurities, preventing external debris from falling into the power pipe and causing pollution, thus ensuring the performance of the power pipe. The threaded connection between the installation ring and the power pipe allows the operator to rotate the installation ring to separate it from the power pipe, thereby facilitating the disassembly and maintenance of the dustproof net.

[0015] The technical effects and advantages of this invention are as follows:

[0016] 1. By opening and closing the first and second valves in sequence, gas can be discharged through the power pipe. The gas push can drive the counterweight plate supported by rollers to move inside the horizontally placed pipeline. Then, by delivering the gas to the expansion belt, the expansion belt expands and contacts the inner wall of the pipeline, thereby making it easy to adjust the expansion belt to a suitable position for sealing. It can also be adapted to pipelines with different angles.

[0017] 2. By rotating the adjusting ring, multiple connecting ropes are wound up, which in turn pulls the positioning plate and adjusting column inward, thereby adjusting the extension length of the adjusting column. Then, the spring's rebound force pushes the positioning plate outward, causing the roller on the adjusting column to contact the inner wall of the pipeline. This allows the equipment to be fixed at the center of pipelines of different specifications, ensuring that the expansion belt is subjected to balanced force, avoiding stress concentration and excessive shear force, and ensuring the service life of the expansion belt. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a side sectional view of the expansion band of the present invention;

[0020] Figure 3 This is a side sectional view of the counterweight plate of the present invention;

[0021] Figure 4 This is a side sectional view of the hollow shell of the present invention;

[0022] Figure 5 This is a front view of the cylindrical body of the present invention;

[0023] Figure 6 This is a front view of the hollow shell of the present invention;

[0024] Figure 7 This is a cross-sectional view of the cylindrical body of the present invention.

[0025] The attached diagram is labeled as follows: 1. Counterweight plate; 2. Pipe body; 3. Expansion band; 4. Air hole; 5. Cavity; 6. Connecting pipe; 7. Second valve; 8. Power pipe; 9. First valve; 10. Assembly ring; 11. Hollow shell; 12. Cylinder body; 13. Spring; 14. Positioning plate; 15. Adjusting column; 16. Roller; 17. Adjusting ring; 18. Connecting rope; 19. Limiting ring; 20. Through hole; 21. Fixing ring; 22. Air supply pipe; 23. Mounting ring; 24. Dustproof net. Detailed Implementation

[0026] 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.

[0027] Refer to the instruction manual appendix Figure 1-7The present invention provides a rapid sealing device for underground coal mines, including a counterweight plate 1, a pipe body 2 installed on the rear side of the counterweight plate 1, an expansion band 3 sleeved on the outside of the pipe body 2, and multiple air holes 4 for connecting the expansion band 3 on the outside of the pipe body 2, a cavity 5 opened inside the counterweight plate 1, a connecting pipe 6 connected to the pipe body 2 installed inside the cavity 5, and a second valve 7 installed on the outside of the rear end of the connecting pipe 6;

[0028] The second valve 7 has two power pipes 8 for connecting the connecting pipe 6. The two power pipes 8 are symmetrically distributed about the central axis of the connecting pipe 6. The front side of the power pipe 8 away from the connecting pipe 6 passes through the counterweight plate 1 and extends to the front side of the counterweight plate 1. The first valve 9 is installed on the outside of the power pipe 8 near the connecting pipe 6.

[0029] When using the above-mentioned equipment to seal underground pipelines in coal mines, the workers place the entire equipment inside the pipeline and position it at the center of the pipeline. Therefore, a counterweight plate 1 passes through the front end of the connecting pipe 6 and extends to the front side of the counterweight plate 1. An assembly ring 10 is fitted outside the connecting pipe 6, and a hollow shell 11 is fitted outside the assembly ring 10. Multiple sets of auxiliary components for enhancing stability are installed inside the hollow shell 11. Each set of auxiliary components includes a cylinder 12 installed outside the assembly ring 10, and the cylinder 12 is located inside the hollow shell 11. A spring 13 and a positioning plate 14 are located inside the cylinder 12. The positioning plate 14 is located on the side of the spring 13 away from the assembly ring 10, and an adjusting column 15 is installed on the side of the positioning plate 14 away from the spring 13. The end of the adjusting column 15 away from the positioning plate 14 passes through the cylinder 12 and the hollow shell 11 sequentially and extends to the outside of the hollow shell 11. A roller 16 is installed on the outside of the end of the adjusting column 15 away from the hollow shell 11.

[0030] In this way, the tension of the spring 13 can be used to push the positioning plate 14 and the adjusting column 15 outward, and make the roller 16 on the adjusting column 15 contact the inner wall of the pipeline. The rollers 16 on the multiple sets of adjusting columns 15 can provide multi-directional support for the overall equipment and fix the equipment at the center of the pipeline. This can make the expansion band 3 bear the force evenly, avoid stress concentration and excessive shear force, and ensure the service life of the expansion band 3.

[0031] To facilitate the adaptation of pipelines of different specifications, an adjusting ring 17 is fitted outside the front end of the assembly ring 10. The adjusting ring 17 is movably connected to the assembly ring 10 through a bearing. A connecting rope 18 is installed on the rear end of the adjusting ring 17 on the side corresponding to the cylinder 12. The end of the connecting rope 18 away from the adjusting ring 17 passes through the hollow shell 11 and the cylinder 12 in sequence and is fixed together with the positioning plate 14. The spring 13 is fitted outside the connecting rope 18.

[0032] This allows the adjusting ring 17, which is movably connected to the assembly ring 10, to rotate. The rotation of the adjusting ring 17 winds up multiple connecting ropes 18. The connecting ropes 18 move inward between the pulling positioning plate 14 and the adjusting column 15, thereby adjusting the extension length of the adjusting column 15. Then, the spring 13 pushes the positioning plate 14 outward, causing the roller 16 on the adjusting column 15 to contact the inner wall of the pipeline. This allows the equipment to be fixed inside pipelines of different specifications.

[0033] After fixing the expansion band 3 to the center of the pipeline, the operator needs to connect the gas supply equipment to the connecting pipe 6. Therefore, a fixing ring 21 is installed on the outside of the front end of the connecting pipe 6, and a detachable gas supply pipe 22 is installed inside the fixing ring 21. In this way, the gas supply pipe 22 can be assembled to the fixing ring 21, thereby connecting the gas supply pipe 22 to the connecting pipe 6. Then, the gas is delivered to the inside of the connecting pipe 6 through the gas supply pipe 22. Then, the first valve 9 is opened and the second valve 7 is closed, so that the gas can flow through the connecting pipe 6 to the inside of the power pipe 8. The gas is then discharged to the outside through the power pipe 8. With the push of the gas, the counterweight plate 1 supported by the roller 16 can be moved in the horizontally placed pipeline, thereby facilitating the adjustment of the expansion band 3 to the appropriate position for sealing.

[0034] To ensure gas discharge from the power pipe 8, through holes 20 are provided on both sides of the hollow shell 11, with the through holes 20 corresponding to the positions of the power pipe 8. This prevents the hollow shell 11 from obstructing the discharge of gas from the power pipe 8, thus ensuring gas discharge from the power pipe 8.

[0035] Furthermore, to prevent external impurities from entering the power pipe 8 and causing contamination, an installation ring 23 is threadedly connected inside the front end of the power pipe 8. A dustproof net 24 is installed inside the installation ring 23. In this way, the dustproof net 24 can block external impurities and prevent them from entering the power pipe 8, thus ensuring the performance of the power pipe 8.

[0036] After adjusting the expansion band 3 to the appropriate position, the operator closes the first valve 9 and opens the second valve 7, allowing gas to flow through the connecting pipe 6 into the inside of the pipe body 2, and then be discharged into the expansion band 3 through the air hole 4. Since the outer front end and the outer rear end of the pipe body 2 are both fitted with limiting rings 19, and the expansion band 3 is located between the two limiting rings 19, the expansion band 3 can expand and contact the inner wall of the pipeline after being limited by the limiting rings 19, thereby sealing the pipeline.

[0037] Meanwhile, to ensure the extension and retraction stability of the aforementioned adjusting column 15, the diameter of the positioning plate 14 is equal to the inner diameter of the cylinder 12, and the diameter of the positioning plate 14 is greater than the diameter of the adjusting column 15. In this way, the positioning plate 14 can be used to limit the adjusting column 15, prevent the adjusting column 15 from separating from the cylinder 12 during the extension and retraction process, and ensure the stability of the adjusting column 15 when it moves.

[0038] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 rapid sealing device for underground coal mines, comprising a counterweight plate (1), characterized in that: The counterweight plate (1) is equipped with a tube body (2) on its rear side. An expansion band (3) is sleeved on the outside of the tube body (2), and multiple air holes (4) for connecting the expansion band (3) are opened on the outside of the tube body (2). A cavity (5) is opened inside the counterweight plate (1), and a connecting pipe (6) connected to the tube body (2) is installed inside the cavity (5). A second valve (7) is installed on the outside of the rear end of the connecting pipe (6). The second valve (7) has two power pipes (8) for connecting the connecting pipe (6) on its front side. The two power pipes (8) are symmetrically distributed about the central axis of the connecting pipe (6). The front side of the power pipe (8) away from the connecting pipe (6) passes through the counterweight plate (1) and extends to the front side of the counterweight plate (1). The first valve (9) is installed on the outside of the power pipe (8) near the connecting pipe (6).

2. The rapid sealing device for underground coal mines according to claim 1, characterized in that: The front end of the connecting tube (6) passes through the counterweight plate (1) and extends to the front side of the counterweight plate (1). An assembly ring (10) is sleeved on the outside of the connecting tube (6). A hollow shell (11) is sleeved on the outside of the assembly ring (10). Multiple sets of auxiliary components for enhancing stability are installed inside the hollow shell (11).

3. The rapid sealing device for underground coal mines according to claim 2, characterized in that: Each set of auxiliary components includes a cylinder (12) installed outside the assembly ring (10), and the cylinder (12) is located inside the hollow shell (11). The cylinder (12) is provided with a spring (13) and a positioning plate (14). The positioning plate (14) is located on the side of the spring (13) away from the assembly ring (10), and an adjusting column (15) is installed on the side of the positioning plate (14) away from the spring (13). The end of the adjusting column (15) away from the positioning plate (14) passes through the cylinder (12) and the hollow shell (11) in sequence and extends to the outside of the hollow shell (11). A roller (16) is installed on the outside of the end of the adjusting column (15) away from the hollow shell (11).

4. The rapid sealing device for underground coal mines according to claim 3, characterized in that: An adjusting ring (17) is sleeved on the front end of the assembly ring (10). The adjusting ring (17) and the assembly ring (10) are movably connected by a bearing. A connecting rope (18) is installed on the rear end of the adjusting ring (17) corresponding to the side of the cylinder (12). The end of the connecting rope (18) away from the adjusting ring (17) passes through the hollow shell (11) and the cylinder (12) in sequence and is fixed together with the positioning plate (14). The spring (13) is sleeved on the outside of the connecting rope (18).

5. The rapid sealing device for underground coal mines according to claim 1, characterized in that: The tube body (2) is fitted with limiting rings (19) on both the front and rear exteriors, and the expansion band (3) is located between the two limiting rings (19).

6. The rapid sealing device for underground coal mines according to claim 2, characterized in that: The hollow shell (11) has through holes (20) on both sides, and the through holes (20) are positioned in a front-to-back correspondence with the power pipe (8).

7. The rapid sealing device for underground coal mines according to claim 3, characterized in that: The diameter of the positioning plate (14) is equal to the inner diameter of the cylinder (12), and the diameter of the positioning plate (14) is greater than the diameter of the adjusting column (15).

8. The rapid sealing device for underground coal mines according to claim 1, characterized in that: A fixing ring (21) is installed on the front end of the connecting pipe (6), and a detachable air supply pipe (22) is installed inside the fixing ring (21).

9. A rapid sealing device for underground coal mines according to claim 1, characterized in that: The front end of the power pipe (8) is internally threaded with an installation ring (23), and a dustproof net (24) is installed inside the installation ring (23).

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