Closed door for underground coal mine

Abstract

The application discloses airtight door for underground coal mine, including sealing door assembly, the sealing door assembly is composed of door frame and sealing body, the sealing body is provided with pressure relief through hole, one side of the sealing body pressure relief through hole is fixedly connected with pressure relief assembly, the pressure relief assembly is composed of fixed valve body, exhaust pipe and control piston, one end of the pressure relief assembly is also fixedly connected with control assembly, the control assembly is connected between the control piston, the control assembly is used for controlling the position of the control piston in the fixed valve body, the application can realize the active and safe balance of the pressure difference inside and outside the door through the cooperative setting of the pressure relief assembly and the control assembly, thereby greatly reducing the opening and closing difficulty of the airtight door, avoiding the equipment damage caused by the brute force operation, and simultaneously having the guiding and cooling functions, effectively reducing the speed and temperature of the released gas, and effectively avoiding the risk that the high-temperature and high-pressure gas flow directly sprays to cause harm to the operator.

Description

Technical Field

[0001] This application relates to the field of underground sealing door technology, and in particular to sealing doors used in coal mines. Background Technology

[0002] Coal mine underground airtight doors are key facilities for ensuring safe production in mines. Their main function is to isolate dangerous areas such as goaf, fire zone, and gas accumulation zone, prevent the spread of disasters, and provide a safety barrier for personnel escape and rescue. Their sealing reliability, ease of opening and closing, and operational safety are directly related to the life safety of underground personnel and the overall safety of the mine.

[0003] In existing technologies, underground airtight doors in coal mines are mostly heavy steel structures, relying on sealing strips between the door leaf and the door frame to achieve static sealing. Due to the influence of mine ventilation systems and disaster environments, there is often a huge pressure difference between the inside and outside of the airtight door. Under positive pressure difference, high-pressure gas presses the door leaf tightly against the door frame; under negative pressure difference, the door leaf is firmly sucked in. Faced with door leaves weighing several tons and additional pressure resistance, operators often cannot open or close them manually, and may even need to use non-standard tools to force them open, which can easily lead to permanent damage to the door leaf, hinges, or sealing structure.

[0004] At the same time, in order to open the door to release pressure, ordinary and simple pressure release methods have the problem of uncontrollable pressure release process. At the moment of opening, the high-pressure airflow may carry coal dust out at high speed, causing impact injury to the human body.

[0005] In other words, existing technologies have the following technical problems: ordinary underground sealing doors are difficult to depressurize quickly under pressure differences, and depressurization can easily cause injury. Therefore, an underground sealing door for coal mines is proposed to address these problems. Summary of the Invention

[0006] This embodiment provides an underground airtight door for coal mines to solve the problems of ordinary underground sealing doors in the prior art, such as difficulty in quickly depressurizing under pressure difference and the risk of injury during depressurization.

[0007] According to one aspect of this application, an underground sealing door for coal mines is provided, including a sealing door assembly, the sealing door assembly comprising a door frame and a sealing body;

[0008] The sealing body is provided with a pressure relief through hole, and a pressure relief assembly is fixedly connected to one side of the pressure relief through hole of the sealing body. The pressure relief assembly consists of a fixed valve body, an exhaust pipe and a control piston.

[0009] A control component is also fixedly connected to one end of the pressure relief assembly. The control component is connected to the control piston and is used to control the position of the control piston within the fixed valve body.

[0010] Furthermore, the door frame and the sealing body are hinged together, a fixed valve body is fixedly connected to one side of the pressure relief hole of the sealing body, and a protective cover is fixedly connected to the other side of the pressure relief hole of the sealing body, and the protective cover is provided with filter holes.

[0011] Furthermore, an exhaust pipe is fixedly connected to the upper part of the fixed valve body, and the inner cavity of the exhaust pipe is connected to the inner cavity of the fixed valve body at a right angle. A control piston is slidably connected in the inner cavity of the fixed valve body.

[0012] Furthermore, a sealing ring is also fixedly connected to the inner cavity of the fixed valve body.

[0013] Furthermore, a sealing gasket is fixedly connected to the surface of the sealing ring.

[0014] Furthermore, a guide pipe is fixedly connected to one end of the exhaust pipe, and the guide pipe is arranged in a reciprocating bending configuration.

[0015] Furthermore, both the guide tube and the heat-conducting fins are made of heat-conducting materials.

[0016] Furthermore, the control assembly includes a fixed base, a control slider, a connecting guide rod, and a control screw. The fixed base is fixedly disposed at one end of the fixed valve body. The fixed base has a sliding groove cavity inside. The control slider is slidably connected in the cavity of the fixed base. The connecting guide rod is fixedly connected to the side wall of the control slider. One end of the connecting guide rod extends into the cavity of the fixed valve body and slides with the fixed valve body. The connecting guide rod is fixedly connected to the control piston.

[0017] Furthermore, a control screw is rotatably connected between the two walls of the inner cavity of the fixed seat. The control screw passes through the control slider and is threadedly engaged with the control slider. A control disk is rotatably connected to one end of the fixed seat, and the control disk is fixedly connected to one end of the control screw.

[0018] Furthermore, one end of the guide tube is also fixedly connected to an exhaust angle adjuster, which includes a circular connecting seat, a rotating seat, and an L-shaped exhaust pipe. The bottom end of the guide tube is fixedly connected to a circular connecting seat, the circular connecting seat has a first channel inside, the rotating seat is rotatably arranged inside the circular connecting seat, the rotating seat has a second channel inside, the first channel and the second channel are interconnected, the bottom end of the rotating seat is fixedly connected to an L-shaped exhaust pipe, and one end of the L-shaped exhaust pipe is provided with a connector.

[0019] In order to solve the technical problems in the prior art, such as the difficulty in opening and closing ordinary underground sealing doors in coal mines when there is an internal and external pressure difference, the lack of safe and controllable pressure relief means, and the safety hazard of high-temperature gas ejection during the pressure relief process, this application, through the coordinated setting of pressure relief components and control components, can achieve active and safe balance of the internal and external pressure difference of the door, thereby greatly reducing the difficulty of opening and closing the sealing door, avoiding equipment damage caused by brute force operation, and having guiding and cooling functions, effectively reducing the speed and temperature of the released gas, and effectively avoiding the risk of direct injection of high-temperature and high-pressure gas flow causing injury to operators. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application;

[0022] Figure 2 This is a front view structural diagram of one embodiment of this application;

[0023] Figure 3 This is a top view structural diagram of one embodiment of this application;

[0024] Figure 4 This is a cross-sectional structural diagram of a pressure relief assembly according to an embodiment of this application;

[0025] Figure 5 This is a cross-sectional structural diagram of a control component according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of an exhaust angle adjuster according to an embodiment of this application;

[0027] Figure 7 This is one embodiment of the present application. Figure 6 A magnified structural diagram of point A.

[0028] In the diagram: 1. Sealing door assembly; 101. Door frame; 102. Sealing body; 2. Pressure relief assembly; 201. Fixed valve body; 202. Exhaust pipe; 203. Guide pipe; 204. Control piston; 205. Sealing ring; 206. Sealing gasket; 207. Heat-conducting fins; 3. Control assembly; 301. Fixed seat; 302. Control slider; 303. Connecting guide rod; 304. Control screw; 305. Control panel; 4. Exhaust angle adjuster; 401. Circular connecting seat; 4011. First channel; 402. Rotating seat; 4022. Second channel; 403. L-shaped exhaust pipe; 404. Connector; 5. Protective cover; 501. Filter hole. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] Please see Figure 1 and Figure 2 As shown, an underground airtight door for coal mines includes a sealing door assembly 1, which consists of a door frame 101 and a sealing body 102.

[0031] The sealing body 102 is provided with a pressure relief through hole, and a pressure relief assembly 2 is fixedly connected to one side of the pressure relief through hole of the sealing body 102. The pressure relief assembly 2 consists of a fixed valve body 201, an exhaust pipe 202 and a control piston 204.

[0032] A control component 3 is also fixedly connected to one end of the pressure relief component 2. The control component 3 is connected to the control piston 204. The control component 3 is used to control the position of the control piston 204 inside the fixed valve body 201.

[0033] To address the technical problems of existing coal mine underground sealed doors, such as difficulty in opening and closing when there is an internal and external pressure difference, lack of safe and controllable pressure relief methods, and the safety hazard of high-temperature gas ejection during pressure relief, this application achieves active and safe balance of the internal and external pressure difference through the coordinated setting of pressure relief component 2 and control component 3. This greatly reduces the difficulty of opening and closing the sealed door, avoids equipment damage caused by brute force, and also has guiding and cooling functions, effectively reducing the speed and temperature of the released gas, and effectively avoiding the risk of direct injection of high-temperature and high-pressure gas into the operator.

[0034] For specific technical solutions, please refer to Figure 1 and Figure 2 As shown, the door frame 101 is hinged to the sealing body 102. A fixed valve body 201 is fixedly connected to one side of the pressure relief hole of the sealing body 102, and a protective cover 5 is fixedly connected to the other side of the pressure relief hole of the sealing body 102. The protective cover 5 is provided with filter holes 501. Through this technical solution, the protective cover 5 can effectively prevent large pieces of coal gangue, debris and other objects from blocking the pressure relief hole, ensuring the long-term unobstructed flow of the pressure relief channel. The filter holes 501 allow gas to pass through while playing a preliminary filtering role, which is particularly suitable for use in underground coal mines.

[0035] As a preferred technical solution, please refer to Figure 3 and Figure 4 As shown, an exhaust pipe 202 is fixedly connected to the upper part of the fixed valve body 201. The inner cavity of the exhaust pipe 202 is interconnected with the inner cavity of the fixed valve body 201 and is set at a right angle. A control piston 204 is slidably connected in the inner cavity of the fixed valve body 201. Through this technical solution, the right-angled exhaust pipe 202 changes the direction of gas flow, from direct horizontal injection to upward discharge. This initially avoids the airflow being directed towards the alleyway that personnel may pass through. By controlling the sliding of the control piston 204 in the fixed valve body 201, the opening, closing and opening degree of the pressure relief channel can be realized, thereby realizing the control function of pressure relief flow.

[0036] As a further technical solution, see [link / reference] Figure 5 As shown, a sealing ring 205 is also fixedly connected in the inner cavity of the fixed valve body 201. Through this technical solution, when the control piston 204 slides to the closed position, its end will be tightly fitted with the sealing ring 205, forming the first reliable sealing interface, ensuring the airtightness of the pressure relief assembly in the non-working state, and preventing gas leakage.

[0037] For a preferred technical solution, please refer to Figure 5 As shown, a sealing gasket 206 is fixedly connected to the surface of the sealing ring 205. Through this technical solution, when the pressure relief assembly 2 is in a closed state, the control piston 204 presses against the sealing gasket 206. By utilizing the elastic deformation of the sealing gasket 206 material, a tighter and more airtight soft seal can be formed, further ensuring the overall isolation performance of the airtight door and effectively preventing the leakage of harmful gases downhole.

[0038] To effectively cool the high-temperature gas during depressurization and prevent injury from jetting gas, a guide pipe 203 is fixedly connected to one end of the exhaust pipe 202. The guide pipe 203 is designed with reciprocating bends to extend the flow path and residence time of the high-temperature gas flow. Several heat-conducting fins 207 are also fixedly connected to the outer surface of the guide pipe 203. With this technical solution, when the high-temperature gas flows through the reciprocating bends of the guide pipe 203, its flow resistance increases, and the flow velocity is buffered. Simultaneously, the contact area and contact time between the gas and the inner wall of the pipe significantly increase. Heat is transferred through the pipe wall to the heat-conducting fins 207, which greatly increase the heat exchange area with the downhole air. Through air convection and thermal radiation, heat is rapidly dissipated, thereby achieving effective cooling of the high-temperature vented gas.

[0039] As a further technical solution, both the guide tube 203 and the heat-conducting fins 207 are made of heat-conducting materials, such as copper alloy or aluminum alloy, to ensure that heat can be efficiently transferred from the gas to the fins and dissipated into the environment, achieving the best passive cooling effect.

[0040] For specific technical solutions, please refer to Figure 4 and Figure 5 As shown, the control component 3 includes a fixed base 301, a control slider 302, a connecting guide rod 303, and a control screw 304. The fixed base 301 is fixedly disposed at one end of the fixed valve body 201. The fixed base 301 has a sliding groove cavity inside. The control slider 302 is slidably connected in the cavity of the fixed base 301. The connecting guide rod 303 is fixedly connected to the side wall of the control slider 302. One end of the connecting guide rod 303 extends into the cavity of the fixed valve body 201 and slides with the fixed valve body 201. The connecting guide rod 303 is fixedly connected to the control piston 204. Through this technical solution, the linear motion of the control piston 204 is converted into the precise guided motion of the control slider 302 in the fixed base 301, resulting in a stable structure and reliable transmission.

[0041] As a preferred technical solution, a control screw 304 is rotatably connected between the two walls of the inner cavity of the fixed base 301. The control screw 304 passes through the control slider 302 and is threadedly engaged with the control slider 302. A control disk 305 is rotatably connected to one end of the fixed base 301. The control disk 305 is fixedly connected to one end of the control screw 304. With this technical solution, the operator only needs to rotate the control disk 305 to convert the rotational motion into precise linear movement of the control slider 302 and the control piston 204 through the mechanical principle of the control screw 304 and the control slider 302. This structure has the advantages of labor saving, self-locking, and controllable opening, making the operation process safe and stable.

[0042] As a further technical solution, one end of the guide pipe 203 is also fixedly connected to an exhaust angle adjuster 4. The exhaust angle adjuster 4 includes a circular connecting seat 401, a rotating seat 402, and an L-shaped exhaust pipe 403. The bottom end of the guide pipe 203 is fixedly connected to the circular connecting seat 401. The circular connecting seat 401 has a first channel 4011 inside. The rotating seat 402 is rotatably arranged inside the circular connecting seat 401. The rotating seat 402 has a second channel 4022 inside. The first channel 4011 and the second channel 4022 are interconnected. An L-shaped exhaust pipe 403 is fixedly connected to the bottom of the seat 402. One end of the L-shaped exhaust pipe 403 is provided with a connector 404. With this technical solution, the operator can manually rotate the seat 402, thereby driving the L-shaped exhaust pipe 403 to rotate 360 ​​degrees in the horizontal plane. This allows the direction of the final exhaust port to be flexibly adjusted. Depending on the specific layout of the underground roadway and the wind direction, the treated gas can be directed to a safe area that is uninhabited, open, or downwind, further improving the safety and flexibility of the operation. The connector 404 can be used to connect a longer exhaust hose to guide the gas to a safer location further away.

[0043] Preferably, a friction damping is provided between the circular connecting seat 401 and the rotating seat 402. The friction damping is a moderate friction force provided by materials such as polytetrafluoroethylene gaskets or rubber O-rings. Its function is to ensure that the rotating seat 402 can maintain its position stably after being adjusted to the required angle, and will not easily change its direction due to airflow vibration or slight touch, thus ensuring the stability of the exhaust direction.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sealed door for use in underground coal mines, including a sealing door assembly (1), wherein the sealing door assembly (1) is composed of a door frame (101) and a sealing body (102); Its features are: The sealing body (102) is provided with a pressure relief through hole, and a pressure relief assembly (2) is fixedly connected to one side of the pressure relief through hole of the sealing body (102). The pressure relief assembly (2) consists of a fixed valve body (201), an exhaust pipe (202), and a control piston (204). A control component (3) is also fixedly connected to one end of the pressure relief component (2). The control component (3) is connected to the control piston (204). The control component (3) is used to control the position of the control piston (204) inside the fixed valve body (201).

2. The airtight door for underground coal mines according to claim 1, characterized in that: The door frame (101) is hinged to the sealing body (102). A fixed valve body (201) is fixedly connected to one side of the pressure relief hole of the sealing body (102). A protective cover (5) is fixedly connected to the other side of the pressure relief hole of the sealing body (102). A filter hole (501) is provided on the protective cover (5).

3. The airtight door for underground coal mines according to claim 1, characterized in that: An exhaust pipe (202) is fixedly connected to the upper part of the fixed valve body (201). The inner cavity of the exhaust pipe (202) is connected to the inner cavity of the fixed valve body (201) at a right angle. A control piston (204) is slidably connected in the inner cavity of the fixed valve body (201).

4. The airtight door for underground coal mines according to claim 1, characterized in that: A sealing ring (205) is also fixedly connected to the inner cavity of the fixed valve body (201).

5. The airtight door for underground coal mines according to claim 4, characterized in that: A sealing gasket (206) is fixedly connected to the surface of the sealing ring (205).

6. The airtight door for underground coal mines according to claim 3, characterized in that: A guide pipe (203) is fixedly connected to one end of the exhaust pipe (202). The guide pipe (203) is arranged in a reciprocating bending manner, and a number of heat-conducting fins (207) are fixedly connected to the outer surface of the guide pipe (203).

7. The airtight door for underground coal mines according to claim 6, characterized in that: Both the guide tube (203) and the heat-conducting fins (207) are made of heat-conducting materials.

8. The airtight door for underground coal mines according to claim 1, characterized in that: The control component (3) includes a fixed seat (301), a control slider (302), a connecting guide rod (303), and a control screw (304). The fixed seat (301) is fixedly disposed at one end of the fixed valve body (201). The fixed seat (301) has a sliding groove cavity inside. The control slider (302) is slidably connected in the cavity of the fixed seat (301). The connecting guide rod (303) is fixedly connected to the side wall of the control slider (302). One end of the connecting guide rod (303) extends into the cavity of the fixed valve body (201) and slides with the fixed valve body (201). The connecting guide rod (303) is fixedly connected to the control piston (204).

9. The airtight door for underground coal mines according to claim 8, characterized in that: A control screw (304) is rotatably connected between the two walls of the inner cavity of the fixed base (301). The control screw (304) passes through the control slider (302) and is threadedly engaged with the control slider (302). A control disk (305) is rotatably connected to one end of the fixed base (301). The control disk (305) is fixedly connected to one end of the control screw (304).

10. The airtight door for underground coal mines according to claim 6, characterized in that: One end of the guide pipe (203) is also fixedly connected to an exhaust angle adjuster (4). The exhaust angle adjuster (4) includes a circular connecting seat (401), a rotating seat (402), and an L-shaped exhaust pipe (403). The bottom end of the guide pipe (203) is fixedly connected to the circular connecting seat (401). The circular connecting seat (401) has a first channel (4011) inside. The rotating seat (402) is rotatably arranged inside the circular connecting seat (401). The rotating seat (402) has a second channel (4022) inside. The first channel (4011) and the second channel (4022) are interconnected. The bottom end of the rotating seat (402) is fixedly connected to the L-shaped exhaust pipe (403). One end of the L-shaped exhaust pipe (403) is provided with a connector (404).

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