Built-in negative pressure self-compensation type sealing assembly of gas drainage pipe for coal mine

Abstract

The utility model discloses a built-in negative pressure self-compensation type sealing assembly of a gas drainage pipe for a coal mine, which comprises a first pipeline, a sealing device is sleeved at the rear end of the first pipeline, two movable sleeve assemblies are sleeved at two ends of the sealing device, and a second pipeline is sleeved on the inner wall of one end, far away from the first pipeline, of the sealing device. Two clamping grooves are formed in the surface of the first pipeline and the surface of the second pipeline, four fixing frames are fixedly connected to the top of the sealing device, the four fixing frames are symmetrically distributed at the upper end and the lower end of the sealing device in pairs, and four compensation mechanisms are fixedly connected to the inner walls of the four fixing frames. According to the built-in negative-pressure self-compensation type sealing assembly of the gas drainage pipe for the coal mine, the movable sleeve assembly, the sliding sleeve and the matched balls are arranged, so that the first pipeline and the sealing device can be rapidly disassembled and assembled, compared with a traditional disassembling and assembling mode, the sealing assembly is more convenient to use, and regular inspection and maintenance of the sealing assembly are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline sealing, and in particular to a built-in negative pressure self-compensating sealing component for gas extraction pipes in coal mines. Background Technology

[0002] Gas extraction via gas pipes is a process that uses a specialized pipeline system to extract and release methane gas from coal seams, rock strata, and goafs. This process aims to reduce methane concentration in mines, prevent methane accumulation that could lead to explosions and other safety accidents, and also facilitate resource utilization.

[0003] Sealing technology is crucial during gas extraction. During extraction, the internal negative pressure causes pipe deformation, altering the sealing gap. Traditional sealing methods involve adding a gasket between the pipe and the sealing assembly. However, this method cannot adjust the sealing state according to changes in internal negative pressure, maintaining a stable seal. This can lead to incomplete sealing, resulting in gas leaks, affecting extraction efficiency and potentially causing safety accidents. Furthermore, the inconvenience of disassembling and assembling gas pipe sealing components creates problems for workers. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a self-compensating negative pressure sealing assembly for gas extraction pipes used in coal mines.

[0005] The following technical solution is adopted: a self-compensating negative pressure sealing assembly for gas extraction pipes in coal mines includes a first pipe, a sealing device fitted at the rear end of the first pipe, two movable sleeve assemblies fitted at both ends of the sealing device, a second pipe fitted on the inner wall of the end of the sealing device away from the first pipe, two slots opened on the surfaces of the first and second pipes, four fixed brackets fixedly connected to the top of the sealing device, the four fixed brackets being symmetrically distributed in pairs at the upper and lower ends of the sealing device, four compensation mechanisms fixedly connected to the inner walls of the four fixed brackets, and the lower ends of the four compensation mechanisms respectively penetrating the upper and lower ends of the sealing device and being located inside the sealing device.

[0006] Optionally, the sealing device includes a sealing tube, a negative pressure sensitive element is fixedly provided at the top end of the sealing tube, a limiting groove is opened at the rear end of the sealing tube, a first sealing ring is sleeved on the inner wall of the limiting groove, and four circular positioning holes are opened through the rear end of the sealing tube.

[0007] Optionally, the four circular positioning holes are arranged in a circumferential array at the rear end of the sealing tube, and four ball bearings are provided inside the four circular positioning holes.

[0008] Optionally, the movable sleeve assembly includes a sliding sleeve, the inner wall of which is fixedly connected to a spring, and the sliding sleeve is fixedly connected to a sealing tube via the spring.

[0009] Optionally, the compensation mechanism includes a cylinder, which is fixedly connected to the inner wall of the fixed frame. A guide rod is fixedly connected to the telescopic end of the cylinder. The guide rod is slidably connected to the inner wall of the circular hole. A support ring is fixedly connected to the bottom end of the guide rod. The support ring is slidably connected to the inner wall of the slide groove. A second sealing ring is fixedly connected to the bottom end of the support ring.

[0010] Optionally, the inner diameter of the circle formed by the two second sealing rings is equal to the outer diameter of the second pipe.

[0011] Optionally, the outer diameter of the first sealing ring is equal to the inner diameter of the rear end of the sliding sleeve.

[0012] Optionally, the inner diameter of the cross-section at both ends of the circular positioning hole is slightly smaller than the inner diameter of the ball.

[0013] The technical effects that can be achieved by the technical means of this utility model are as follows:

[0014] (1) In this utility model, by setting up a movable sleeve component, sliding sleeve, and cooperating with ball bearings, the purpose of quickly disassembling and assembling the first pipe and the sealing device can be achieved. Compared with the traditional disassembly and assembly method, it is more convenient and convenient to regularly inspect and maintain the sealing component.

[0015] (2) In this utility model, by setting a compensation mechanism, compared with the traditional sealing method, it is ensured that during the gas extraction process, the compensation mechanism can automatically adjust the sealing state according to the change of negative pressure in the pipeline and maintain a stable sealing effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a partial half-section three-dimensional structural diagram of the present invention.

[0018] Figure 3 This is a three-dimensional half-section view of the sealing tube of this utility model.

[0019] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0020] Figure 5 This is a three-dimensional structural diagram of the compensation mechanism of this utility model.

[0021] In the diagram: 1. First pipe; 2. Movable sleeve assembly; 201. Sliding sleeve; 202. Spring; 3. Sealing device; 301. Sealing tube; 302. Negative pressure sensitive element; 303. Ball bearing; 304. First sealing ring; 305. Slide groove; 306. Circular hole; 307. Circular positioning hole; 308. Limiting groove; 4. Compensation mechanism; 401. Cylinder; 402. Support ring; 403. Second sealing ring; 404. Guide rod; 5. Fixing bracket; 6. Second pipe; 7. Slot. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be noted that the orientations or positional relationships indicated by terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] A preferred embodiment of the self-compensating negative pressure sealing assembly built into the gas extraction pipe for coal mines provided by this utility model is, for example... Figures 1 to 5 As shown: A self-compensating negative pressure sealing assembly for gas extraction pipes in coal mines includes a first pipe 1, a sealing device 3 fitted at the rear end of the first pipe 1, two movable sleeve assemblies 2 fitted at both ends of the sealing device 3, a second pipe 6 fitted on the inner wall of the end of the sealing device 3 away from the first pipe 1, two slots 7 opened on the surface of the first pipe 1 and the second pipe 6, four fixing brackets 5 fixedly connected to the top of the sealing device 3, the four fixing brackets 5 being symmetrically distributed in pairs at the upper and lower ends of the sealing device 3, four compensation mechanisms 4 fixedly connected to the inner wall of the four fixing brackets 5, the lower ends of the four compensation mechanisms 4 respectively penetrating the upper and lower ends of the sealing device 3 and being located inside the sealing device 3.

[0026] In this embodiment, the sealing device 3 includes a sealing tube 301, a negative pressure sensitive element 302 is fixedly provided at the top end of the sealing tube 301, a limiting groove 308 is provided at the rear end of the sealing tube 301, a first sealing ring 304 is sleeved on the inner wall of the limiting groove 308, four circular positioning holes 307 are provided through the rear end of the sealing tube 301, the four circular positioning holes 307 are circumferentially distributed at the rear end of the sealing tube 301, and four ball bearings 303 are provided inside the four circular positioning holes 307. The movable sleeve assembly 2 includes a sliding sleeve 201, a spring 202 is fixedly connected to the inner wall of the sliding sleeve 201, and the sliding sleeve 201 is fixedly connected to the sealing tube 301 through the spring 202. The outer diameter of the first sealing ring 304 is equal to the inner diameter of the rear end of the sliding sleeve 201.

[0027] Through the above scheme, pulling the sliding sleeve 201 compresses the spring 202, allowing the ball 303 to move inside the circular positioning hole 307. When the ball 303 is engaged in the slot 7, the sliding sleeve 201 is released. At this time, the inner wall of the sliding sleeve 201 completely covers the outer side of the circular positioning hole 307, preventing the ball 303 from moving inside the circular positioning hole 307, thus achieving the locking effect. When disassembly is required, pulling the sliding sleeve 201 allows the ball 303 to move within the circular positioning hole 307. Due to the slot 7... Due to the shape characteristics of the pipe, the second pipe 6 is pulled outward, and the ball 303 will move towards the outside of the circular positioning hole 307, thus allowing the second pipe 6 to be pulled out. It should be noted that after installation, the first sealing ring 304 plays a certain sealing role, preventing gas from escaping into the air from the circular positioning hole 307. The inner diameter of the cross-section of the upper and lower ends of the circular positioning hole 307 is slightly smaller than the inner diameter of the ball 303, which can confine the ball 303 inside the circular positioning hole 307 and prevent it from slipping out.

[0028] In this embodiment, the compensation mechanism 4 includes a cylinder 401, which is fixedly connected to the inner wall of the fixed frame 5. A guide rod 404 is fixedly connected to the telescopic end of the cylinder 401. The guide rod 404 is slidably connected to the inner wall of the circular hole 306. A support ring 402 is fixedly connected to the bottom end of the guide rod 404. The support ring 402 is slidably connected to the inner wall of the slide groove 305. A second sealing ring 403 is fixedly connected to the bottom end of the support ring 402. The inner diameter of the circle formed by the two second sealing rings 403 is equal to the outer diameter of the second pipe 6. This ensures that the second sealing ring 403 can always contact the second pipe 6, maintaining a tight seal.

[0029] Through the above scheme, the telescopic end of cylinder 401 is finely adjusted up and down. During this process, the telescopic end of cylinder 401 drives the guide rod 404 to slide inside the round hole 306, thereby driving the support ring 402 to slide on the inner wall of the slide groove 305. This controls the tightness of the upper and lower second sealing rings 403 to perform self-compensation, thereby ensuring that during the gas extraction process, the compensation mechanism 4 can automatically adjust the sealing state according to the change of negative pressure in the sealing pipe 301 to maintain a stable sealing effect.

[0030] Working principle: When operating and using this utility model, as follows... Figures 1 to 5 As shown, during installation, the second pipe 6 is inserted into the sealing pipe 301. Simultaneously, the sliding sleeve 201 is pulled, compressing the spring 202, allowing the ball bearing 303 to move within the circular positioning hole 307. When the ball bearing 303 is engaged in the groove 7, the sliding sleeve 201 is released. At this point, the inner wall of the sliding sleeve 201 completely covers the outer side of the circular positioning hole 307, preventing the ball bearing 303 from moving within the circular positioning hole 307, thus achieving a locking effect. It should be noted that after installation, the first sealing ring 304 provides a certain degree of sealing, preventing gas from escaping into the air through the circular positioning hole 307. When disassembly is required, the sliding sleeve 201 is pulled, allowing the ball bearing 303 to move within the circular positioning hole 307. Due to the shape of the groove 7... With its distinctive features, when the second pipe 6 is pulled outward, the ball bearing 303 moves outward toward the outer side of the circular positioning hole 307, thus pulling out the second pipe 6. By setting a negative pressure sensitive element 302, it can accurately sense changes in negative pressure inside the sealing pipe 301 and respond in a timely manner, thereby causing the extension end of the cylinder 401 to make slight up and down adjustments. During this process, the extension end of the cylinder 401 drives the guide rod 404 to slide inside the circular hole 306, thereby driving the support ring 402 to slide on the inner wall of the slide groove 305, controlling the tightness of the upper and lower second sealing rings 403 for self-compensation, thus ensuring that during the gas extraction process, the compensation mechanism 4 can automatically adjust the sealing state according to the changes in negative pressure inside the sealing pipe 301, maintaining a stable sealing effect.

[0031] The above are merely illustrative embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model. Furthermore, it should be noted that the components of this utility model are not limited to the overall application described above. Each technical feature described in the specification of this utility model can be used individually or in combination as needed. Therefore, this utility model naturally covers other combinations and specific applications related to the points of this utility model.

Claims

1. A built-in negative pressure self-compensation type sealing assembly for gas drainage pipe in coal mine, comprising a first pipeline (1), characterized in that: The rear end of the first pipeline (1) is provided with a sealing device (3), two movable sleeve assemblies (2) are arranged at the two ends of the sealing device (3), a second pipeline (6) is arranged on the inner wall of the end of the sealing device (3) away from the first pipeline (1), two clamping grooves (7) are formed on the surfaces of the first pipeline (1) and the second pipeline (6), four fixed frames (5) are fixedly connected to the top of the sealing device (3), the four fixed frames (5) are symmetrically distributed at the upper and lower ends of the sealing device (3), four compensation mechanisms (4) are fixedly connected to the inner walls of the four fixed frames (5), and the upper end and the lower end of the sealing device (3) are respectively penetrated by the four compensation mechanisms (4) and arranged in the sealing device (3). The sealing device (3) comprises a sealing pipe (301), a negative pressure sensitive element (302) is fixedly arranged at the top end of the sealing pipe (301), a limiting groove (308) is formed at the rear end of the sealing pipe (301), a first sealing ring (304) is arranged on the inner wall of the limiting groove (308), and four circular positioning holes (307) are formed at the rear end of the sealing pipe (301).

2. The gas drainage pipe negative pressure self-compensation type sealing assembly for coal mine according to claim 1, characterized in that: The four circular positioning holes (307) are arranged in a circumferential array at the rear end of the sealing pipe (301), and four rolling balls (303) are arranged in the four circular positioning holes (307).

3. The gas drainage pipe negative pressure self-compensation type sealing assembly built-in for coal mine according to claim 1, characterized in that: The movable sleeve assembly (2) comprises a sliding sleeve (201), the inner wall of the sliding sleeve (201) is fixedly connected with a spring (202), and the sliding sleeve (201) is fixedly connected with the sealing pipe (301) through the spring (202).

4. The gas drainage pipe negative pressure self-compensation type sealing assembly built-in for coal mine according to claim 1, characterized in that: The compensation mechanism (4) comprises a gas cylinder (401), the gas cylinder (401) is fixedly connected with the inner wall of the fixed frame (5), the telescopic end of the gas cylinder (401) is fixedly connected with a guide rod (404), the guide rod (404) is slidably connected with the inner wall of the circular hole (306), the bottom end of the guide rod (404) is fixedly connected with a supporting ring (402), the supporting ring (402) is slidably connected with the inner wall of the sliding groove (305), and the bottom end of the supporting ring (402) is fixedly connected with a second sealing ring (403).

5. The gas drainage pipe negative pressure self-compensation type sealing assembly built-in for coal mine according to claim 4, characterized in that: The inner diameter of the circle formed by the two second sealing rings (403) is equal to the outer diameter of the second pipeline (6).

6. The gas drainage pipe with built-in negative pressure self-compensation type sealing assembly for coal mine according to claim 1, characterized in that: The outer diameter of the first sealing ring (304) is equal to the inner diameter of the rear end of the sliding sleeve (201).

7. The gas drainage pipe with built-in negative pressure self-compensation type sealing assembly for coal mine according to claim 1, characterized in that: The inner diameters of the upper and lower ends of the circular positioning hole (307) are slightly smaller than the inner diameter of the rolling ball (303).

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