Automatic isolation fireproof door for coal mine laneway

Abstract

The invention discloses a coal mine laneway automatic isolation fireproof door which comprises two isolation door frames arranged in parallel, vertical plates are fixedly arranged in the middles of the isolation door frames, a pedestrian transportation isolation door is rotationally connected to one side of each vertical plate, a transverse plate is fixedly connected to the side, away from the pedestrian transportation isolation door, of each vertical plate, and an isolation door above a floating groove is rotationally connected to the transverse plate; the vertical plate is rotationally connected with an upper isolation door of the rubber belt conveyor; a doorsill is fixedly arranged at the bottom of the isolation door frame and rotationally connected with a bottom isolation door. A middle isolation door is rotationally connected between the vertical plate and the isolation door frame. When a fire disaster occurs, closing actions of the pedestrian transportation isolation door, the isolation door on the upper portion of the rubber belt conveyor, the isolation door above the floating groove, the middle isolation door and the bottom isolation door are completed through the first pneumatic jack and the second pneumatic jack, and complete plugging is achieved at the connecting section where the rubber belt conveyor penetrates through the fireproof door. The sealing performance between the fireproof door and the rubber belt conveyor is improved, the risk of leakage and spreading of flames and poisonous gas is reduced, and the personal safety of underground operating personnel and the safety of a coal mine are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of safety protection of underground equipment in coal mines, in particular to an automatic isolation fire door for coal mine tunnels. Background Art

[0002] In underground coal mining, belt conveyors are deployed in the main transport tunnels of the mine to transport coal. As the core equipment for coal transportation, belt conveyors are typically deployed along the chute and main tunnel, transporting coal from the working face to the main tunnel. The coal is then transported to the pit yard or surface via transportation equipment within the main tunnel (such as transfer machines and belt conveyors) to ensure continuous production. Existing underground coal mine fire doors are typically single isolation doors, installed at the junction of the main tunnel and the chute (transport or return air tunnel) of the coal mining working face. During normal production, the fire door remains open, and the belt conveyor operates continuously. Coal is transported from the working face via the chute to the main tunnel, and then transported out through the main tunnel transportation system.

[0003] In related technologies, when a fire occurs near the coal mining face, the fire doors are closed to prevent the fire and smoke from entering the main tunnel, and the fire spread path is blocked through physical isolation and emergency closure mechanisms. Because the belt conveyor passes through the connection section of the fire door, when the fire door is closed, there is no obstruction between the fire door and the areas above the float trough belt, between the float trough belt and the bottom trough belt, and below the bottom trough belt. The sealing between the fire door and the belt conveyor is poor, and there is a risk of flames and toxic gases leaking and spreading from the above areas, which has an adverse impact on the personal safety of workers and the safety of the coal mine. Summary of the Invention

[0004] In order to improve the sealing between the belt conveyor and the fire door when a fire occurs and prevent the leakage and spread of flames and toxic gases, the present application provides an automatic isolation fire door for coal mine shafts and tunnels.

[0005] The present application provides an automatic fire-proof door for coal mine tunnels, which adopts the following technical solutions:

[0006] An automatic isolation fire door for a coal mine tunnel comprises two parallel isolation door frames:

[0007] A vertical plate is fixedly provided in the middle of the isolation door frame, one side of the vertical plate is rotatably connected to the pedestrian transport isolation door, and a horizontal plate is fixedly connected to the side of the vertical plate away from the pedestrian transport isolation door, and the horizontal plate is rotatably connected to the isolation door above the float trough that is adapted to the belt float trough of the belt conveyor;

[0008] The side of the vertical plate facing away from the pedestrian transport isolation door is rotatably connected to the upper isolation door of the belt conveyor. The upper isolation door of the belt conveyor is located between the horizontal plate and the upper end of the isolation door frame. The space between the horizontal plate and the upper end of the isolation door frame is set as the upper channel. The cross-sectional area of ​​the upper isolation door of the belt conveyor is adapted to that of the upper channel.

[0009] A threshold is fixed at the bottom of the isolation door frame, and the threshold is rotatably connected to the bottom isolation door. The space between the bottom groove tape and the threshold is set as the lower channel, and the cross-sectional area of ​​the bottom isolation door is adapted to the lower channel;

[0010] The space between the floating groove tape and the bottom groove tape is set as a groove chamber, and a middle isolation door adapted to the cross-sectional area of ​​the groove chamber is rotatably connected between the vertical plate and the isolation door frame.

[0011] Optionally, there is a cavity between the two isolation door frames, and the isolation door frames are connected to a material delivery pipe, which is connected to a fire-proof foaming material box group. The material delivery pipe passes through the corresponding isolation door frame on one side close to the isolation door frame and is connected to the cavity.

[0012] Optionally, the material delivery pipelines are all connected to pneumatic stop valves.

[0013] Optionally, both sides of the isolation door frame are provided with linkage components for controlling the synchronous closing of the isolation door above the float trough, the middle isolation door and the bottom isolation door, the linkage components include a second pneumatic jack, a first fixed pulley, a second fixed pulley, a first steel wire rope, a second steel wire rope and a third steel wire rope, the first fixed pulley and the second fixed pulley are fixedly connected to the isolation door frame, one end of the first steel wire rope, the second steel wire rope and the third steel wire rope are fixedly connected to the output end of the second pneumatic jack, the first steel wire rope is wrapped around the first fixed pulley and is fixedly connected to the isolation door above the float trough, the second steel wire rope is wrapped around the first fixed pulley and is fixedly connected to the middle isolation door, and the third steel wire rope is sequentially wrapped around the first fixed pulley and the second fixed pulley and is fixedly connected to the bottom isolation door.

[0014] Optionally, the horizontal plate is fixedly connected to a right-angle plate, the isolation door above the float trough is fixedly connected to a U-shaped block, the right-angle plate is provided with a positioning hole adapted to the U-shaped block, the U-shaped block is provided with a U-shaped groove, the output end of the second pneumatic jack is fixedly connected to a fourth steel wire rope, and the fourth steel wire rope is fixedly connected to a support pin adapted to the U-shaped groove.

[0015] Optionally, a first pneumatic jack is provided between the pedestrian transport isolation door and the upper isolation door of the belt conveyor on the same side, and the output end of the first pneumatic jack is rotatably connected to two isolation door actuating rods, and the two isolation door actuating rods are rotatably connected to the pedestrian transport isolation door and the upper isolation door of the belt conveyor respectively.

[0016] Optionally, the isolation door frames are provided with extraction and discharge pipe holes and a plurality of feng shui drainage pipeline holes, and the vertical plates are provided with a plurality of cable holes, and the extraction and discharge pipe holes, feng shui drainage pipeline holes and cable holes are all connected to the cavity.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When a fire occurs, the first and second pneumatic jacks complete the closing of the pedestrian transport isolation door, the upper isolation door of the belt conveyor, the isolation door above the float trough, the middle isolation door, and the bottom isolation door. This completely blocks the connection section where the belt conveyor passes through the fire door, improving the sealing between the fire door and the belt conveyor, preventing flames and toxic gases from passing through the fire door. This makes the fire isolation more thorough and reduces the risk of flames and toxic gases leaking and spreading, which is beneficial to protecting the personal safety of underground workers and the safety of the coal mine.

[0019] 2. After the fire door is closed, the pneumatic shut-off valve is opened, and the fire-fighting foam material in the fire-fighting foam material box group flows through the material delivery pipe and is sprayed into the cavity between the two isolation door frames. The fire-fighting foam material expands and solidifies in the cavity, filling and sealing the cavity to form a flame-retardant isolation zone. Fire prevention and fire extinguishing are linked together to form a double safety barrier, further suppressing the fire.

[0020] 3. The first pneumatic jack, the second pneumatic jack and the pneumatic stop valve are linked to the underground fire prevention and extinguishing monitoring and early warning system. The first pneumatic jack and the second pneumatic jack are used as the core actuators, and the pneumatic stop valve is used to provide advance warning and rapid response to fire, so as to realize the rapid closing of the fire door and the spraying of fire extinguishing materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an automatic isolation fire door for a coal mine tunnel in an embodiment of the present application.

[0022] Figure 2 Schematic diagram to highlight the location of the belt conveyor and isolation door frame.

[0023] Figure 3 A schematic diagram to highlight the position of the bottom trough tape and the middle isolation door.

[0024] Figure 4 This is a schematic diagram of the closed state of the automatic isolation fire door in a coal mine shaft.

[0025] Figure 5 This is a schematic diagram of the state when the support pin is inserted into the U-shaped block.

[0026] Figure 6 It is a schematic diagram of the state when the support pin is separated from the U-shaped block.

[0027] Figure 7 This is a schematic diagram of the control mechanism when the automatic isolation fire door of a coal mine shaft is linked with the fire prevention and extinguishing monitoring and early warning system.

[0028] Explanation of reference numerals: 100, belt conveyor; 110, belt float trough; 120, bottom trough belt; 1, isolation door frame; 2, vertical board; 3, pedestrian transport isolation door; 4, horizontal board; 5, isolation door above the float trough; 6, upper isolation door of belt conveyor; 7, threshold; 8, bottom isolation door; 9, middle isolation door; 91, card slot; 10, material delivery pipeline; 11, fire extinguishing foam material box group; 12, pneumatic stop valve; 13, Linkage assembly; 14. Second pneumatic jack; 15. First fixed pulley; 16. Second fixed pulley; 17. First steel wire rope; 18. Second steel wire rope; 19. Third steel wire rope; 20. Right-angle plate; 21. U-shaped block; 23. U-shaped groove; 24. Fourth steel wire rope; 25. Support pin; 26. First pneumatic jack; 27. Isolation door actuation connecting rod; 28. Extraction and release pipe hole; 29. ​​Fengshui drainage pipe hole; 30. Cable hole. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0030] The embodiment of the present application discloses an automatic isolation fire door for a coal mine tunnel.

[0031] Example

[0032] Reference Figure 1 and Figure 2 An automatic fire-proof door for a coal mine tunnel comprises two parallel isolation door frames 1, each with a vertical panel 2 fixed in the middle. A pedestrian transport isolation door 3 is pivotally connected to one side of the vertical panel 2, and the pedestrian transport isolation door 3 is approximately the same height as the isolation door frame 1. A horizontal panel 4 is fixedly connected to the side of the vertical panel 2 facing away from the pedestrian transport isolation door 3, and the end of the horizontal panel 4 facing away from the vertical panel 2 is fixedly connected to the isolation door frame 1. A belt conveyor upper isolation door 6 is pivotally connected to the side of the vertical panel 2 facing away from the pedestrian transport isolation door 3. Multiple hinges can be installed on the vertical panel 2 and the belt conveyor upper isolation door 6, with the outer hinges securing to the vertical panel 2 and the inner hinges securing to the belt conveyor upper isolation door 6. The belt conveyor upper isolation door 6 is located between the horizontal panel 4 and the upper end of the isolation door frame 1. The space between the horizontal panel 4 and the upper end of the isolation door frame 1 is defined as an upper passage, and the cross-sectional area of ​​the belt conveyor upper isolation door 6 matches that of the upper passage.

[0033] Reference Figure 3 and Figure 4A first pneumatic jack 26 is installed between the pedestrian transport isolation gate 3 and the upper isolation gate 6 of the belt conveyor on the same side. Operators can securely install the first pneumatic jack 26 on the tunnel roof. The output end of the first pneumatic jack 26 is rotatably connected to two isolation gate actuating rods 27. These two isolation gate actuating rods 27 are rotatably connected to the pedestrian transport isolation gate 3 and the upper isolation gate 6 of the belt conveyor, respectively. The two isolation gate actuating rods 27 are symmetrically arranged along the axis of the first pneumatic jack 26.

[0034] Reference Figure 3 and Figure 4 When a fire occurs, the output end of the first pneumatic jack 26 extends, driving the two isolation door actuation links 27 to rotate, and the angle between the two isolation door actuation links 27 gradually increases, thereby pushing the pedestrian transport isolation door 3 and the upper isolation door 6 of the belt conveyor away from each other. Finally, the end of the pedestrian transport isolation door 3 away from the first pneumatic jack 26 abuts against the isolation door frame 1, and the end of the upper isolation door 6 of the belt conveyor away from the first pneumatic jack 26 also abuts against the isolation door frame 1, realizing the closing action of the pedestrian transport isolation door 3 and the upper isolation door 6 of the belt conveyor.

[0035] Reference Figure 1 and Figure 3 The horizontal plate 4 is rotatably connected to an upper trough isolation door 5 that is compatible with the belt float trough 110 of the belt conveyor 100. A threshold 7 is fixed to the bottom of the isolation door frame 1, and the threshold 7 is rotatably connected to a bottom isolation door 8. The space between the bottom trough tape 120 and the threshold 7 is defined as a lower channel, and the bottom isolation door 8 is compatible with the cross-sectional area of ​​the lower channel. The space between the float trough tape and the bottom trough tape 120 is defined as a trough chamber. A middle isolation door 9 is rotatably connected between the vertical plate 2 and the isolation door frame 1. The middle isolation door 9 is rotatably connected to the isolation door frame 1 and the vertical plate 2 at both ends along the length direction. The rotatable connection can also be achieved by installing multiple hinges, with multiple hinges installed between the vertical plate 2 and the isolation door frame 1. The middle isolation door 9 is located between the upper trough isolation door 5 and the bottom isolation door 8, and is located near the bottom trough tape 120. The middle isolation door 9 is compatible with the cross-sectional area of ​​the trough chamber.

[0036] Reference Figure 1 and Figure 3 , the isolation door frame 1 is provided with a linkage assembly 13 on both sides along the length direction for controlling the synchronous closing of the isolation door 5 above the floating trough, the middle isolation door 9 and the bottom isolation door 8. The linkage assembly 13 includes a second pneumatic jack 14, a first fixed pulley 15, a second fixed pulley 16, a first steel wire rope 17, a second steel wire rope 18 and a third steel wire rope 19. The operator can fix the second pneumatic jack 14 on the frame of the belt conveyor 100.

[0037] Reference Figure 5 and Figure 6The horizontal plate 4 is fixedly connected to a right-angle plate 20. The right-angle plate 20 comprises two perpendicularly fixed right-angled blocks, one of which is parallel to and integral with the horizontal plate 4. A U-shaped block 21 is fixedly connected to the upper isolation door 5 of the float tank. The right-angle plate 20 has a positioning hole that fits within the U-shaped block 21. The U-shaped block 21 has a U-shaped groove 23. The output end of the second pneumatic jack 14 is fixedly connected to a fourth steel wire rope 24, which is fixedly connected to a support pin 25 that fits within the U-shaped groove 23.

[0038] Reference Figure 3 and Figure 5 When the belt conveyor 100 is in operation, the upper trough isolation door 5, the middle isolation door 9, and the bottom isolation door 8 are all parallel to the length of the belt conveyor 100. At this point, the U-shaped block 21 passes through the positioning hole, the support pin 25 passes through the U-shaped groove 23 and contacts the right-angle plate 20, and the upper trough isolation door 5 and the cross plate 4 are perpendicular, ensuring that the upper trough isolation door 5 remains parallel to the length of the belt conveyor 100. Furthermore, the fourth steel wire rope 24 is not tensioned and does not pull on the support pin 25.

[0039] Reference Figure 3 and Figure 5 The first fixed pulley 15 and the second fixed pulley 16 of the linkage assembly 13 are fixedly connected to the isolation door frame 1, the second fixed pulley 16 is located directly below the first fixed pulley 15, one end of the first steel wire rope 17, one end of the second steel wire rope 18, and one end of the third steel wire rope 19 are all fixedly connected to the output end of the second pneumatic jack 14, the end of the first steel wire rope 17 away from the second pneumatic jack 14 is wrapped around the first fixed pulley 15 and fixedly connected to the isolation door 5 above the float tank, the end of the second steel wire rope 18 away from the second pneumatic jack 14 is wrapped around the first fixed pulley 15 and the middle isolation door 9, and the end of the third steel wire rope 19 away from the second pneumatic jack 14 is wrapped around the first fixed pulley 15 and the second fixed pulley 16 in sequence and fixedly connected to the bottom isolation door 8.

[0040] Reference Figure 3 and Figure 5 When the belt conveyor 100 is in working condition, the second pneumatic jack 14 cooperates with the second steel wire rope 18 and the third steel wire rope 19 to make the middle isolation door 9 and the bottom isolation door 8 in a taut state. At this time, the middle isolation door 9 and the bottom isolation door 8 are both parallel to the length direction of the belt conveyor 100.

[0041] Reference Figure 3 and Figure 6When a fire occurs, the output end of the second pneumatic jack 14 contracts, pulling all the steel cables to move. The second pneumatic jack 14 pulls the fourth steel cable 24, which in turn pulls the support pin 25 toward the end away from the cross plate 4. After the support pin 25 disengages the U-shaped groove 23, the U-shaped block 21 disengages from the positioning hole under the weight of the floating trough upper isolation door 5. The floating trough upper isolation door 5 rotates downward around its pivot point with the cross plate 4. Simultaneously, the second pneumatic jack 14 pulls the first steel cable 17, ultimately achieving contact between the isolation door frame 1 and both sides of the length of the floating trough upper isolation door 5. At this point, the end of the floating trough upper isolation door 5 facing away from the cross plate 4 is located within the belt float trough 110 of the belt conveyor 100 and contacts the upper surface of the belt.

[0042] Reference Figure 3 and Figure 4 When the output end of the second pneumatic jack 14 contracts and pulls the second steel wire rope 18 to move, the central isolation door 9 gradually rotates upward around the rotation point between the isolation door frame 1 and the vertical plate 2, thereby causing the central isolation door 9 to abut against the isolation door frame 1, thereby achieving the central isolation door 9 blocking the cross section of the slot chamber along the height direction of the isolation door frame 1. When the central isolation door 9 is closed, it will interfere with the frame of the belt conveyor 100. Therefore, slots 91 that cooperate with the frame are opened at both ends of the central isolation door 9. When the central isolation door 9 rotates, the frame is locked into the slots 91, ensuring that the cross section of the slot chamber is in a blocked state when the central isolation door 9 is closed.

[0043] Reference Figure 3 and Figure 6 When the output end of the second pneumatic jack 14 contracts and pulls the third steel wire rope 19 to move, the bottom isolation door 8 gradually rotates upward around the rotation point between it and the threshold 7, thereby making the bottom isolation door 8 abut against the isolation door frame 1, so that the bottom isolation door 8 blocks the cross section of the lower channel along the height direction of the door frame.

[0044] Reference Figure 1 and Figure 4 When a fire occurs, the first pneumatic jack 26 and the second pneumatic jack 14 are used to close the pedestrian transport isolation door 3, the upper isolation door 6 of the belt conveyor, the isolation door 5 above the float trough, the middle isolation door 9 and the bottom isolation door 8, and complete blocking is achieved at the connection section where the belt conveyor 100 passes through the fire door of this application, thereby improving the sealing between the fire door and the belt conveyor 100, preventing flames and toxic gases from passing through the fire door, making the fire isolation more thorough, and reducing the risk of flames and toxic gases leaking and spreading, which is beneficial to ensuring the personal safety of underground workers and the safety of coal mines.

[0045] Reference Figure 1 and Figure 4The pedestrian transport isolation door 3, the upper isolation door 6 of the belt conveyor, the isolation door 5 above the float trough, the middle isolation door 9 and the bottom isolation door 8 on the above-mentioned two isolation door frames 1 are all symmetrically arranged along the cross-section in the middle of the two isolation door frames 1. The fire door of this application is set as a double-layer to achieve layered blocking of the spread of fire and toxic gases, and the fire prevention effect is better. In addition, the fire door is made of cold-rolled steel plates, which has good explosion resistance, can reduce the damage of the blast shock wave, and has high reliability. Key components (such as the isolation door frame 1, the pedestrian transport isolation door 3, the first pneumatic jack 26, and the second pneumatic jack 14) are made of wear-resistant and corrosion-resistant materials, require a long maintenance cycle, and have low maintenance costs.

[0046] Reference Figure 1 and Figure 2 There is a cavity between the two isolation door frames 1. The upper ends of the isolation door frames 1 are connected to a material delivery pipe 10. The material delivery pipe 10 is connected to a fire-proof foaming material box group 11. The fire-proof foaming material box group 11 is fixedly installed on the top of the tunnel. The fire-proof foaming material box group 11 stores fire-proof foaming material. The fire-proof foaming material has good self-foaming performance, flow and diffusion properties, and stacking properties. At the same time, it can achieve high-multiple expansion and rapid dense filling. It has the characteristics of being non-flammable, non-combustible, and non-shrinking after curing. In addition, the cured foam body does not collapse or crack under high-temperature fire sources or high-temperature environments (the fire-proof foaming material in this embodiment uses the Pratt fire-proof material JTF-Ⅱ produced by Xuzhou Ji'an Mining Technology Co., Ltd.).

[0047] Reference Figure 1 and Figure 2 A material delivery pipe 10 is provided on one side of the isolation door frame 1, passing through the corresponding isolation door frame 1 and communicating with the cavity. Each material delivery pipe 10 is connected to a pneumatic shut-off valve 12. When the fire door is closed, the cavity is in a sealed state. By opening the pneumatic shut-off valve 12, the fire-fighting foaming material in the fire-fighting foaming material box group 11 flows through the material delivery pipe 10 and is sprayed into the cavity between the two layers of isolation door frames 1. The material expands, foams, and solidifies in the cavity, thereby filling and sealing the cavity and forming a flame-retardant isolation zone, which can further suppress the fire.

[0048] Reference Figure 1 and Figure 2, the length of the isolation door frame 1 is greater than the width of the belt conveyor 100, so the fire-proof extinguishing foam material can flow to the bottom through the gap between the isolation door frame 1 on both sides of the belt conveyor 100. At the same time, the solidified fire-proof extinguishing foam material improves the sealing between the fire door and the belt conveyor 100, further preventing flames and toxic gases from passing through the fire door, and reducing the risk of flames and toxic gases leaking and spreading. After solidification, the fire-proof extinguishing foam material is combined with the fire isolation door to achieve a linkage between fire prevention and fire extinguishing. It not only reflects the physical isolation effect of the fire door, but also realizes the active fire extinguishing function, forming a double safety barrier. After being closed, it can prevent the fire and toxic gases from spreading to the other side of the fire door. At the same time, it can increase the explosion impact performance of the fire isolation door, further improving safety.

[0049] Reference Figure 1 and Figure 4 The isolation door frame 1 is provided with a pumping pipe hole 28 and multiple drainage pipe holes 29, and the vertical panels 2 are provided with a plurality of cable holes 30. The pumping pipe holes 28, drainage pipe holes 29, and cable holes 30 are all connected to the cavity. When the fire door is open, the pumping pipe holes 28, drainage pipe holes 29, and cable holes 30 are reserved for pipelines. The pumping pipe holes 28 are used for the installation of ventilation ducts, the drainage pipe holes 29 are used for the installation of drainage pipes, and the cable holes 30 are used for the installation of underground cable lines.

[0050] Reference Figure 1 and Figure 4 In the event of a fire, the holes in the isolation door frame 1 and the vertical plate 2 may have gaps, which could allow flames and toxic gases to leak and spread. After the fire-proof foam material fills and seals the cavity, due to its inherent flow and diffusion properties, it will fill and seal the gaps in the holes, further preventing flames and toxic gases from passing through the fire door, thereby improving the fire door's sealing performance and safety.

[0051] Reference Figure 1 and Figure 7 At the same time, the first pneumatic jack 26, the second pneumatic jack 14 and the pneumatic stop valve 12 in this application can be linked with the underground fire prevention and extinguishing monitoring and early warning system. With the first pneumatic jack 26 and the second pneumatic jack 14 as the core actuators, in conjunction with the pneumatic stop valve 12, advance warning and rapid response to fires are provided, achieving rapid closure of fire doors and discharge of fire extinguishing materials. Using full pneumatic drive, there is no risk of electrical sparks, which meets the explosion-proof requirements of high-gas coal mines. In addition, fire-fighting foaming materials are reserved for use simultaneously to increase the airtightness of fire doors, expand the coverage of fire-fighting materials, reduce the oxygen supply in the fire tunnel, and ensure the personal safety of workers and the safety of coal mines.

[0052] Reference Figure 1 and Figure 7When linked to a fire prevention and extinguishing monitoring and early warning system, the system includes a server equipped with a controller for receiving and issuing control signals. The underground fire sensing system is electrically connected to the server and includes a carbon monoxide sensor, a methane sensor, and a temperature sensor. The carbon monoxide sensor can be the GTH1000 mining-grade carbon monoxide sensor, the methane sensor can be the KG9001C high- and low-concentration methane sensor, and the temperature sensor can be the GWD100 mining-grade temperature sensor.

[0053] Reference Figure 1 and Figure 7 The server is also electrically connected to a pneumatic switch system, which includes a pneumatic on / off switch for the first pneumatic jack 26, the second pneumatic jack 14, and the pneumatic shut-off valve 12. When a fire occurs, any sensor in the fire sensing system senses the fire and transmits a sensing signal to the controller. After receiving the sensing signal, the controller transmits a control signal to the pneumatic switch system. The pneumatic switch system controls the first pneumatic jack 26 and the second pneumatic jack 14 to extend their output terminals, closing the pedestrian transport isolation door 3, the upper isolation door 6 of the belt conveyor, the upper isolation door 5 of the float trough, the middle isolation door 9, and the bottom isolation door 8, achieving complete sealing at the connection section where the belt conveyor 100 passes through the fire door. Then control to open the pneumatic stop valve 12, and the fire-proof foaming material in the fire-proof foaming material box group 11 is sprayed into the cavity between the two layers of isolation door frames 1, expands and foams in the cavity and solidifies, thereby filling and sealing the cavity, forming a flame-retardant isolation zone, isolating oxygen and completing the closure of the tunnel.

[0054] The implementation principle of the automatic isolation fire door of a coal mine tunnel in the embodiment of the present application is as follows: when a fire occurs, the pedestrian transport isolation door 3, the upper isolation door 6 of the belt conveyor, the isolation door 5 above the float trough, the middle isolation door 9 and the bottom isolation door 8 are closed by the first pneumatic jack 26 and the second pneumatic jack 14, and the connection section where the belt conveyor 100 passes through the fire door of the present application is completely blocked, thereby improving the sealing between the fire door and the belt conveyor 100, preventing flames and toxic gases from passing through the fire door, making the fire isolation more thorough, reducing the risk of flames and toxic gases leaking and spreading, and being beneficial to protecting the personal safety of underground workers and the safety of the coal mine. After the fire door is closed, by opening the pneumatic stop valve 12, the fire extinguishing foam material in the fire extinguishing foam material box group 11 flows through the feed pipe 10 and is sprayed into the cavity between the two layers of isolation door frames 1, expands and foams in the cavity and solidifies, filling and sealing the cavity to form a flame-retardant isolation belt, thereby further suppressing the fire.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this invention based on specific circumstances.

[0056] In the description of this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An automatic fireproof door for a coal mine tunnel, comprising two parallel isolated door frames (1), characterized in that: A vertical plate (2) is fixedly provided in the middle of the isolation door frame (1), one side of the vertical plate (2) is rotatably connected to a pedestrian transport isolation door (3), a side of the vertical plate (2) facing away from the pedestrian transport isolation door (3) is fixedly connected to a horizontal plate (4), and the horizontal plate (4) is rotatably connected to an isolation door (5) above the float groove that is compatible with the belt float groove (110) of the belt conveyor (100); The side of the vertical plate (2) facing away from the pedestrian transport isolation door (3) is rotatably connected to the upper isolation door (6) of the belt conveyor. The upper isolation door (6) of the belt conveyor is located between the horizontal plate (4) and the upper end of the isolation door frame (1). The space between the horizontal plate (4) and the upper end of the isolation door frame (2) is set as an upper channel. The cross-sectional area of ​​the upper isolation door (6) of the belt conveyor is adapted to the cross-sectional area of ​​the upper channel. A threshold (7) is fixedly provided at the bottom of the isolation door frame (1), the threshold (7) is rotatably connected to the bottom isolation door (8), the space between the bottom groove tape (120) and the threshold (7) is set as a lower channel, and the cross-sectional area of ​​the bottom isolation door (8) is adapted to that of the lower channel; The space between the floating groove tape (110) and the bottom groove tape (120) is set as a groove chamber, and a middle isolation door (9) adapted to the cross-sectional area of ​​the groove chamber is rotatably connected between the vertical plate (2) and the isolation door frame (1).

2. The automatic isolation fire door for coal mine tunnels according to claim 1, characterized in that: There is a cavity between the two isolation door frames (1), and the isolation door frames (1) are both connected to a material delivery pipe (10), which is connected to a fire-proof foaming material box group (11). The material delivery pipe (10) is passed through a corresponding isolation door frame (1) on one side close to the isolation door frame (1) and is connected to the cavity.

3. The automatic isolation fire door for coal mine tunnels according to claim 2, characterized in that: The material delivery pipelines (10) are all connected to pneumatic stop valves (12).

4. The automatic isolation fire door for coal mine tunnels according to claim 1, characterized in that: Both sides of the isolation door frame (1) are provided with a linkage assembly (13) for controlling the synchronous closing of the isolation door (5) above the float tank, the middle isolation door (9) and the bottom isolation door (8). The linkage assembly (13) includes a second pneumatic jack (14), a first fixed pulley (15), a second fixed pulley (16), a first steel wire rope (17), a second steel wire rope (18) and a third steel wire rope (19). The first fixed pulley (15) and the second fixed pulley (16) are both fixedly connected to the isolation door frame (1). The first steel wire rope (17) and the second steel wire rope (18) are fixedly connected to the isolation door frame (1). One end of the wire rope (17), the second wire rope (18), and the third wire rope (19) are all fixedly connected to the output end of the second pneumatic jack (14); the first wire rope (17) is wound around the first fixed pulley (15) and is fixedly connected to the isolation door (5) above the float tank; the second wire rope (18) is wound around the first fixed pulley (15) and is fixedly connected to the middle isolation door (9); the third wire rope (19) is wound around the first fixed pulley (15) and the second fixed pulley (16) in sequence and is fixedly connected to the bottom isolation door (8).

5. The automatic isolation fire door for coal mine tunnels according to claim 4, characterized in that: The horizontal plate (4) is fixedly connected to a right-angle plate (20), the isolation door (5) above the float tank is fixedly connected to a U-shaped block (21), the right-angle plate (20) is provided with a positioning hole adapted to the U-shaped block (21), the U-shaped block (21) is provided with a U-shaped groove (23), the output end of the second pneumatic jack (14) is fixedly connected to a fourth steel wire rope (24), and the fourth steel wire rope (24) is fixedly connected to a support pin (25) adapted to the U-shaped groove (23).

6. The automatic isolation fire door for coal mine tunnels according to claim 1, characterized in that: A first pneumatic jack (26) is provided between the pedestrian transport isolation door (3) and the upper isolation door (6) of the belt conveyor on the same side. The output end of the first pneumatic jack (26) is rotatably connected to two isolation door actuating connecting rods (27). The two isolation door actuating connecting rods (27) are rotatably connected to the pedestrian transport isolation door (3) and the upper isolation door (6) of the belt conveyor, respectively.

7. The automatic isolation fire door for coal mine tunnels according to claim 1, characterized in that: The isolation door frame (1) is provided with a pumping pipe hole (28) and a plurality of fengshui drainage pipe holes (29), and the vertical plate (2) is provided with a plurality of cable holes (30). The pumping pipe hole (28), the fengshui drainage pipe hole (29) and the cable hole (30) are all connected to the cavity.

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