A coal mine gas extraction construction hole sealing device

Abstract

The utility model relates to the technical field of coal mine gas extraction, and specifically discloses a coal mine gas extraction construction hole sealing device, which comprises: an output pipeline and a main pipeline, a main body mounting plate is fixedly connected to the lower side of the outer wall of the main pipeline, a main extraction head is fixedly connected to the bottom end of the lower surface of the main pipeline, and a wall body connecting plate is arranged on the outer wall of the main pipeline. The adjusting mechanism is composed of an air pump, an air rod, an adjusting disc, a connecting block, a connecting shaft, a first connecting rod, a fixed plate, an adjusting plate, a guide plate and a second connecting rod. The air pump serves as a power source and can accurately adjust the position and angle of the main pipeline. The device is suitable for complex and diverse drilling environments in underground coal mines. Regardless of the drilling angle, depth or position, the device can realize accurate installation and positioning through the adjusting mechanism, greatly improving the versatility and construction efficiency of the device and reducing the construction difficulty and time cost caused by environmental differences.

Description

Technical Field

[0001] This utility model relates to the field of coal mine gas extraction technology, specifically a coal mine gas extraction construction sealing device. Background Technology

[0002] In coal mining, gas drainage is a crucial step in ensuring safe production and the rational use of energy. Coal mine gas is a combustible gas that is generated during coal formation. If it is not drained in time, the gas concentration accumulated underground can easily lead to explosions and other serious safety accidents when it encounters a source of ignition.

[0003] Currently, the sealing devices commonly used in coal mine gas drainage operations have many problems. Existing sealing devices lack stability in their connection to the wall or borehole, easily leading to loosening and displacement, affecting the sealing effect and gas drainage efficiency. Adjusting the device's position and angle to adapt to different construction conditions is complex and difficult to position precisely, increasing construction difficulty and time costs. Furthermore, the sealing performance needs improvement; traditional sealing methods may not effectively prevent gas leakage, resulting in reduced gas drainage and posing safety hazards. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sealing device for coal mine gas extraction construction, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coal mine gas extraction construction sealing device, comprising: an output pipe and a main pipe; a main mounting plate is fixedly connected to the lower side of the outer wall of the main pipe; a main extraction head is fixedly connected to the bottom end of the lower surface of the main pipe; a wall connecting plate is provided on the outer wall of the main pipe; a fixing bolt is movably connected inside the wall connecting plate; an adjustment mechanism is provided on the lower surface of the wall connecting plate; an inflation mechanism is provided inside the wall connecting plate; and a self-locking mechanism is provided between the output pipe and the main pipe.

[0006] Preferably, the adjusting mechanism includes an air pump, which is positioned on the lower surface of the wall connecting plate. An air rod is movably connected to the lower surface of the air pump, and an adjusting plate is movably connected to the output end of the lower surface of the air rod. The adjusting plate is movably connected to the outer wall of the main pipe. Two pairs of connecting blocks are fixedly connected to the lower surface of the adjusting plate. A connecting shaft is movably connected inside each connecting block. First connecting rods are movably connected to the left and right sides of the connecting shaft. A fixing plate is movably connected to one side of each first connecting rod. An adjusting plate is fixedly connected to one side of the fixing plate. Guide plates are fixedly connected to the left and right sides of the outer surface of the main pipe. A second connecting rod is movably connected to the outer wall of the guide plate and is connected to the fixing plate. An annular support plate is movably connected to the outer wall of the adjusting plate.

[0007] Preferably, the inflation mechanism includes an air inlet pipe, which is located inside the wall connecting plate. A high-pressure airbag is fixedly connected to one side of the air inlet pipe, and the high-pressure airbag is connected to the main pipe and the main mounting plate.

[0008] Preferably, the self-locking mechanism includes a self-locking device, which is positioned at the connection between the output pipe and the main pipe. The main pipe has a sliding groove inside, and a first compression spring is movably connected inside the sliding groove. The first compression spring is connected to the self-locking device. The output pipe has a ball groove inside, and a ball is movably connected inside the ball groove. Ball fixing grooves are fixed on the left and right sides of the ball groove.

[0009] Preferably, the outer wall of the output pipe is provided with a groove, a return spring is movably connected inside the groove, a fixing block is fixed inside the return spring, and a limit groove is provided inside the main pipe, and the limit groove is connected to the fixing block.

[0010] Preferably, both the output pipe and the main pipe are provided with mounting seats inside. Flow grooves are opened on the left and right sides of the mounting seats. A valve stem is fixedly connected inside the mounting seats. A second compression spring is movably connected to one side of the valve stem. A mounting plate is fixedly connected to one side of the second compression spring. A compression plate is fixedly connected to one side of the mounting plate.

[0011] Beneficial effects

[0012] This utility model provides a sealing device for coal mine gas drainage construction. Compared with the prior art, it has the following advantages:

[0013] (1) An adjustment mechanism consisting of an air pump, air rod, adjusting disc, connecting block, connecting shaft, first connecting rod, fixed plate, adjusting plate, guide plate, and second connecting rod is used. The air pump serves as the power source, transmitting power to the adjusting disc through the air rod, allowing it to rotate flexibly on the outer wall of the main pipeline. The connecting block, connecting shaft, first connecting rod, fixed plate, and adjusting plate constitute a transmission assembly. When the adjusting disc rotates, it drives the adjusting plate to adjust its position. The guide plate cooperates with the second connecting rod to provide guidance and stability, ensuring a smooth and precise adjustment process. Through the coordinated work of these parts, the position and angle of the main pipeline can be precisely adjusted, adapting to the complex and diverse drilling environment in coal mines. Regardless of different drilling angles, depths, or positions, the adjustment mechanism can achieve precise adjustment. Precise installation and positioning greatly improve the versatility and construction efficiency of the device, reducing construction difficulties and time costs caused by environmental differences. The inflation mechanism, consisting of an air inlet pipe and a high-pressure airbag, delivers gas to the airbag. When gas is injected into the airbag, it expands, tightly fitting the main pipe and mounting plate, effectively filling the gap between the device and the borehole wall. This creates a good seal, preventing gas leakage. Compared to traditional sealing devices, this significantly improves the sealing performance, ensuring the efficiency and safety of gas extraction, reducing the risk of explosions, poisoning, and other safety accidents caused by gas leaks, and providing strong protection for the lives of underground coal mine workers and the normal operation of production.

[0014] (2) The self-locking mechanism, consisting of a self-locking device, a chute, a first compression spring, a ball groove, a ball, a ball fixing groove, a recess, a return spring, a fixing block, and a limiting groove, allows the self-locking device to move flexibly within the chute under the action of the first compression spring. When the output pipe is connected to the main pipe, the ball, guided by the ball groove and the ball fixing groove, cooperates with the self-locking device to achieve initial locking. After the pipe is connected in place, the return spring and the fixing block in the recess engage with the limiting groove, further enhancing the stability of the connection. In the complex working environment of underground coal mines, such as in the presence of vibration or impact, these parts work together to prevent the pipe connection from loosening or falling off, ensuring the stability and reliability of the gas extraction system. This reduces gas extraction interruptions and maintenance costs caused by pipeline connection problems. The gas flow control mechanism, composed of a mounting base, flow channel, valve stem, second compression spring, mounting plate, and compression plate, provides support for the entire gas flow control structure. The flow channel ensures smooth gas flow within the pipeline. The valve stem can move under the action of the second compression spring, driving the mounting plate and compression plate to adjust the gas channel. By controlling the position of the valve stem, the gas flow rate can be adjusted and controlled according to actual extraction needs, achieving precise management of the gas extraction process. This improves the accuracy and efficiency of gas extraction, facilitates the optimization of gas extraction schemes, and enables the effective utilization of coal mine gas resources and safe production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a sealing device for coal mine gas extraction construction according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the adjustment mechanism structure according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the self-locking mechanism structure according to an embodiment of the present invention.

[0018] In the diagram: 1. Output pipe; 101. Main pipe; 102. Main mounting plate; 103. Main extraction head; 2. Wall connecting plate; 201. Fixing bolt; 3. Air pump; 301. Air rod; 302. Adjusting plate; 303. Connecting block; 304. Connecting shaft; 305. First connecting rod; 306. Fixing plate; 307. Adjusting plate; 308. Guide plate; 309. Second connecting rod; 309a. Annular support plate; 4. Air inlet pipe ; 401, High-pressure airbag; 5, Self-locking device; 501, Slide groove; 502, First compression spring; 503, Ball groove; 503a, Ball; 503b, Ball fixing groove; 504, Groove; 504a, Return spring; 504b, Fixing block; 504c, Limiting groove; 505, Mounting base; 505a, Flow groove; 505b, Valve stem; 505c, Second compression spring; 505d, Mounting plate; 505e, Compression plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see Figure 1-3As shown in this embodiment, a coal mine gas drainage construction sealing device is proposed. The gas drainage construction sealing device includes: an output pipe 1 and a main pipe 101. A main mounting plate 102 is fixedly connected to the lower side of the outer wall of the main pipe 101. A main extraction head 103 is fixedly connected to the bottom end of the lower surface of the main pipe 101. A wall connecting plate 2 is provided on the outer wall of the main pipe 101. A fixing bolt 201 is movably connected inside the wall connecting plate 2. An adjustment mechanism is provided on the lower surface of the wall connecting plate 2. An inflation mechanism is provided inside the wall connecting plate 2. A self-locking mechanism is provided between the output pipe 1 and the main pipe 101. The main mounting plate 102 fixedly connected to the lower side of the outer wall of the main pipe 101 provides a stable installation foundation for the entire device. When installed underground, it can be connected to other fixed components to enhance the stability of the device in complex geological environments and prevent the device from shifting due to factors such as vibration and pressure in the coal mine, thus ensuring gas drainage. The gas extraction operation proceeded steadily. The combination of the wall connecting plate 2 and the fixing bolt 201 on the outer wall of the main pipeline 101 achieved a firm connection between the device and the coal mine tunnel wall. By tightening the fixing bolt 201, the wall connecting plate 2 could be tightly fixed to the wall, so that the entire sealing device was firmly installed in the construction position, avoiding the device from loosening and affecting the gas extraction effect and safety. The installation was simple and the disassembly and maintenance were also relatively convenient, which improved the flexibility and efficiency of the construction. The adjustment mechanism on the lower surface of the wall connecting plate 2 included parts such as the air pump 3, the air rod 301, and the adjustment plate 302. When facing drilling at different angles and depths, the operator started the air pump 3. The air pump 3 drove the adjustment plate 302 to rotate on the outer wall of the main pipeline 101 through the air rod 301, which in turn drove the connecting block 303, the connecting shaft 304, the first connecting rod 305 and other parts to work together to achieve precise adjustment of the position and angle of the main pipeline 101.

[0022] Preferably, the adjusting mechanism includes an air pump 3, which is positioned on the lower surface of the wall connecting plate 2. An air rod 301 is movably connected to the lower surface of the air pump 3. An adjusting disc 302 is movably connected to the output end of the lower surface of the air rod 301, and the adjusting disc 302 is movably connected to the outer wall of the main pipe 101. Two pairs of connecting blocks 303 are fixedly connected to the lower surface of the adjusting disc 302. A connecting shaft 304 is movably connected inside the connecting blocks 303. First connecting rods 305 are movably connected to the left and right sides of the connecting shaft 304. A fixing plate 306 is movably connected to one side of the first connecting rod 305. An adjusting plate 307 is fixedly connected to one side of the 06. Guide plates 308 are fixedly connected to the left and right sides of the outer surface of the main pipe 101. A second connecting rod 309 is movably connected to the outer wall of the guide plate 308, and the second connecting rod 309 is connected to the fixed plate 306. An annular support plate 309a is movably connected to the outer wall of the adjusting plate 307. The air pump 3, as the power core, is installed on the lower surface of the wall connecting plate 2. Its stable power output characteristic provides a reliable power source for the entire adjustment process. The air pump 3 transmits power to the adjusting plate 302 through the air rod 301, which has a flexible movable connection. The adjustment plate 302, as a transmission hub, has two pairs of connecting blocks 303 fixed to its lower surface. These, along with the connecting shaft 304, provide a stable connection point for the first connecting rod 305. When the adjustment plate 302 rotates, the first connecting rod 305 swings accordingly, thereby moving the fixed plate 306 and the adjustment plate 307. Furthermore, the annular support plate 309a, movably connected to the outer wall of the adjustment plate 307, plays a crucial role in improving the performance of the adjustment mechanism. The annular support plate 309a surrounds the adjustment plate 307. 07. During the adjustment process, the external force on the adjustment plate 307 can be evenly distributed to avoid deformation or adjustment deviation of the adjustment plate 307 due to uneven local force. In the complex geological environment of underground coal mines, the angle and position of the borehole often vary greatly. The adjustment mechanism needs to frequently and significantly adjust the posture of the main pipeline 101. At this time, the annular support plate 309a can effectively enhance the structural strength and stability of the adjustment plate 307, so that it can maintain a precise movement trajectory when pushing the main pipeline 101 to adjust its position and angle, and ensure that the main pipeline 101 and the borehole are accurately matched.

[0023] Preferably, the inflation mechanism includes an air inlet pipe 4, which is located inside the wall connecting plate 2. A high-pressure airbag 401 is fixedly connected to one side of the air inlet pipe 4, and the high-pressure airbag 401 is connected to the main pipe 101 and the main mounting plate 102. The air inlet pipe 4 is built into the wall connecting plate 2. This concealed and reasonable layout not only saves downhole space but also effectively protects the air inlet pipe 4 from collisions and wear in the complex downhole environment, ensuring the stability of gas delivery. The air inlet pipe 4 serves as a gas transmission channel, with one end connected to an external gas supply device and the other end fixedly connected to the high-pressure airbag 401, enabling stable and rapid delivery of gas into the high-pressure airbag 401. The high-pressure airbag 401 is connected between the main pipe 101 and the main mounting plate 102. When gas is injected into it by the air inlet pipe 4, the high-pressure airbag 401 expands rapidly. Its high elasticity and flexibility allow it to fit tightly against the main pipe 101, the main mounting plate 102 and the borehole wall, effectively filling any tiny gaps between them. In underground coal mines, due to complex geological conditions, the borehole wall is often uneven. Traditional sealing methods are difficult to completely eliminate gaps, leading to an increased risk of gas leakage. However, the expansion and sealing characteristics of the high-pressure airbag 401 can adaptively fill these irregular gaps, forming a complete and tight sealed space, firmly confining the gas within the extraction channel.

[0024] Preferably, the self-locking mechanism includes a self-locking device 5, which is positioned at the connection between the output pipe 1 and the main pipe 101. The main pipe 101 has a groove 501 inside, and a first compression spring 502 is movably connected inside the groove 501, and the first compression spring 502 is connected to the self-locking device 5. The output pipe 1 has a ball groove 503 inside, and a ball 503a is movably connected inside the ball groove 503. Ball fixing grooves 503b are fixed to the left and right sides of the ball groove 503. The outer wall of the output pipe 1 has a groove 504 inside. A return spring 504a is movably connected, and a fixing block 504b is fixedly connected inside the return spring 504a. A limit groove 504c is opened inside the main pipe 101, and the limit groove 504c is connected to the fixing block 504b. Both the output pipe 1 and the main pipe 101 are provided with mounting seats 505. Flow grooves 505a are opened on the left and right sides of the mounting seats 505. A valve stem 505b is fixedly connected inside the mounting seat 505. A second compression spring 505c is movably connected to one side of the valve stem 505b. A mounting plate 505d is fixedly connected to one side of the second compression spring 505c.A compression plate 505e is fixedly attached to one side of the mounting plate 505d. The self-locking device 5, as a core component, is installed at the connection between the output pipe 1 and the main pipe 101. It cooperates with the sliding groove 501 and the first compression spring 502 inside the main pipe 101 to form a basic locking structure. When the output pipe 1 and the main pipe 101 are connected, the self-locking device 5, under the elastic force of the first compression spring 502, can move flexibly within the sliding groove 501, thus accurately adapting to the structure on the output pipe 1. The ball groove 503, ball 503a, and ball fixing groove 503b inside the output pipe 1 further enhance the reliability of the connection. The ball 503a can be placed in the ball groove... The ball bearing 503a rolls within the pipe during the connection process. During this process, the ball bearing 503a interacts with the self-locking device 5. When they are fully engaged, the ball bearing 503a engages with the ball bearing fixing groove 503b, achieving initial locking and effectively preventing relative sliding of the pipe in the horizontal direction. The groove 504 on the outer wall of the output pipe 1, the return spring 504a, and the fixing block 504b work in conjunction with the limiting groove 504c inside the main pipe 101 to further enhance the stability of the connection. After the pipe connection is completed, the return spring 504a pushes the fixing block 504b into the limiting groove 504c, forming a mechanical lock to prevent the pipe from detaching in the axial direction. In underground coal mines, the working environment is complex, with frequent vibrations... In situations involving impacts, traditional pipeline connections are prone to loosening and detachment, which can disrupt gas extraction operations and even lead to safety accidents. The self-locking mechanism, through multiple locking mechanisms, ensures a tight connection between the output pipeline 1 and the main pipeline 101 at all times, allowing for stable operation even under harsh conditions. This effectively reduces the risk of extraction interruptions due to pipeline connection problems, and decreases maintenance frequency and costs. Furthermore, the mounting base 505, flow channel 505a, valve stem 505b, second compression spring 505c, mounting plate 505d, and compression plate 505e inside the output pipeline 1 and main pipeline 101 together constitute the gas flow control structure. The mounting base 505 serves as its... The components provide the installation base, and the flow channel 505a ensures a smooth flow path for the gas. Under the action of the second compression spring 505c, the valve rod 505b can adjust the gas channel by moving the mounting plate 505d and the compression plate 505e. When gas flow needs to be controlled, the operator can push the valve rod 505b with external force to change the contact area between the compression plate 505e and the gas channel, thereby achieving precise control of the gas flow. This gas flow control function allows the sealing device to flexibly adjust its working state according to actual extraction needs, improving the efficiency and accuracy of gas extraction, helping to optimize gas extraction schemes, and achieving efficient utilization of coal mine gas resources.

[0025] In use, before gas extraction, the sealing device is first installed and fixed to the wall of the coal mine tunnel using the wall connecting plate 2 and fixing bolts 201. The main mounting plate 102 on the lower side of the outer wall of the main pipe 101 provides additional support and fixing points for the device, ensuring its stability in the complex underground environment. The main extraction head 103 at the bottom of the lower surface of the main pipe 101 is aligned with the borehole to prepare for gas extraction. When the installation position of the device needs to be adjusted to adapt to boreholes of different angles and depths, the adjustment mechanism is activated, and the air pump 3 installed on the lower surface of the wall connecting plate 2 starts to work. The air pump 3 transmits power to the adjustment plate 302 through the air rod 301. The adjustment plate 302 can rotate flexibly on the outer wall of the main pipe 101 to adjust the gas extraction. Two pairs of connecting blocks 303 on the lower surface of the adjusting disc 302 are connected to the first connecting rod 305 via a connecting shaft 304. When the adjusting disc 302 rotates, it drives the first connecting rod 305 to swing, thereby pushing the fixed plate 306 and the adjusting plate 307 to move. At the same time, the guide plates 308 on both sides of the outer surface of the main pipe 101 cooperate with the second connecting rod 309 to provide guidance and stable support for the adjustment process, ensuring that the adjusting plate 307 can accurately adjust the position and angle of the main pipe 101 to precisely match the borehole. After the main pipe 101 is matched with the borehole, the inflation mechanism is activated to seal it. The air inlet pipe 4 located inside the wall connecting plate 2 is connected to an external air supply device to supply air to the high-pressure airbag 40 fixed between the main pipe 101 and the main mounting plate 102. 1. Gas is injected, and the high-pressure airbag 401 expands under the gas pressure, tightly fitting the main pipe 101, the main mounting plate 102, and the borehole wall, filling the tiny gaps between them to form a sealed space. This effectively prevents gas leakage and ensures the safety and efficiency of the gas extraction process. After the device is positioned and sealed, the output pipe 1 is connected to the main pipe 101. The self-locking device 5 is installed at the connection between the two. The sliding groove 501 and the first compression spring 502 inside the main pipe 101 provide the self-locking device 5 with room to move and elasticity. When the output pipe 1 is connected to the main pipe 101, the self-locking device 5 moves under the action of the first compression spring 502, engaging with the balls 503 in the ball groove 503 inside the output pipe 1. The interaction between the two components allows the ball bearing 503a to engage with the ball bearing fixing groove 503b when they are properly aligned, achieving initial locking and preventing the pipes from sliding relative to each other in the horizontal direction. Simultaneously, the return spring 504a within the groove 504 on the outer wall of the output pipe 1 pushes the fixing block 504b into the limiting groove 504c inside the main pipe 101, forming a mechanical lock and preventing the pipes from detaching in the axial direction. This ensures a secure and reliable connection between the output pipe 1 and the main pipe 101. The output pipe 1, together with the mounting base 505, flow groove 505a, valve stem 505b, second compression spring 505c, mounting plate 505d, and compression plate 505e inside the main pipe 101, constitute the gas flow control structure. The mounting base 505 provides the mounting foundation for other components.The flow channel 505a is the passage for gas flow. When the gas flow rate needs to be adjusted, the operator applies external force to push the valve rod 505b. During its movement, the valve rod 505b overcomes the elastic force of the second compression spring 505c, causing the mounting plate 505d and the compression plate 505e to move. This changes the contact area between the compression plate 505e and the gas passage, thereby achieving precise control of the gas flow rate to meet different gas extraction needs.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sealing device for coal mine gas drainage construction, the gas drainage construction sealing device comprising: The output pipe (1) and the main pipe (101) are provided. A main mounting plate (102) is fixedly connected to the lower side of the outer wall of the main pipe (101). A main extraction head (103) is fixedly connected to the bottom end of the lower surface of the main pipe (101). A wall connecting plate (2) is provided on the outer wall of the main pipe (101). A fixing bolt (201) is movably connected inside the wall connecting plate (2). The wall connecting plate (2) is characterized in that an adjustment mechanism is provided on the lower surface of the wall connecting plate (2), an inflation mechanism is provided inside the wall connecting plate (2), and a self-locking mechanism is provided between the output pipe (1) and the main pipe (101).

2. The sealing device for coal mine gas drainage construction according to claim 1, characterized in that: The adjusting mechanism includes an air pump (3), which is positioned on the lower surface of the wall connecting plate (2). An air rod (301) is movably connected to the lower surface of the air pump (3). An adjusting disc (302) is movably connected to the output end of the lower surface of the air rod (301), and the adjusting disc (302) is movably connected to the outer wall of the main pipe (101). Two pairs of connecting blocks (303) are fixedly connected to the lower surface of the adjusting disc (302). A connecting shaft (304) is movably connected inside the connecting blocks (303). The left and right sides are movably connected to a first connecting rod (305), and a fixed plate (306) is movably connected to one side of the first connecting rod (305). An adjusting plate (307) is fixedly connected to one side of the fixed plate (306). Guide plates (308) are fixedly connected to the left and right sides of the outer surface of the main pipe (101). A second connecting rod (309) is movably connected to the outer wall of the guide plate (308), and the second connecting rod (309) is connected to the fixed plate (306). An annular support plate (309a) is movably connected to the outer wall of the adjusting plate (307).

3. The sealing device for coal mine gas extraction construction according to claim 2, characterized in that: The inflation mechanism includes an air inlet pipe (4), which is located inside the wall connecting plate (2). A high-pressure airbag (401) is fixed to one side of the air inlet pipe (4), and the high-pressure airbag (401) is connected to the main pipe (101) and the main mounting plate (102).

4. A sealing device for coal mine gas extraction construction according to claim 3, characterized in that: The self-locking mechanism includes a self-locking device (5), which is located at the connection between the output pipe (1) and the main pipe (101). The main pipe (101) has a sliding groove (501) inside, and a first compression spring (502) is movably connected inside the sliding groove (501). The first compression spring (502) is connected to the self-locking device (5). The output pipe (1) has a ball groove (503) inside, and a ball (503a) is movably connected inside the ball groove (503). Ball fixing grooves (503b) are fixed on the left and right sides of the ball groove (503).

5. A sealing device for coal mine gas extraction construction according to claim 4, characterized in that: The outer wall of the output pipe (1) is provided with a groove (504), and a return spring (504a) is movably connected inside the groove (504). A fixing block (504b) is fixed inside the return spring (504a). A limiting groove (504c) is provided inside the main pipe (101), and the limiting groove (504c) is connected to the fixing block (504b).

6. A coal mine gas drainage construction sealing device according to claim 5, characterized in that: Both the output pipe (1) and the main pipe (101) are provided with mounting bases (505). Flow grooves (505a) are opened on the left and right sides of the mounting bases (505). A valve stem (505b) is fixedly connected inside the mounting bases (505). A second compression spring (505c) is movably connected to one side of the valve stem (505b). A mounting plate (505d) is fixedly connected to one side of the second compression spring (505c). A compression plate (505e) is fixedly connected to one side of the mounting plate (505d).

Images