Explosion-proof device for mining roadway

Abstract

The invention discloses a mining roadway explosion suppression device which comprises a shell, a containing pipe filled with a gas generating agent is fixedly arranged on the shell, a gas generator is arranged in the containing pipe, the space between the shell and the containing pipe is filled with a fire extinguishing agent, a nozzle used for discharging the fire extinguishing agent is arranged at one end of the shell, and the mining roadway explosion suppression device further comprises an isolating membrane arranged at the nozzle. The nozzle is blocked; the detection unit is used for detecting an explosion dangerous case and controlling the gas generator to trigger when the dangerous case occurs; the exhaust ring is located between the shell and the containing pipe, and an air jet opening is formed in the side, facing the nozzle, of the exhaust ring; the exhaust pipe is communicated between the accommodating pipe and the exhaust pipe, and the exhaust pipe is communicated with the air nozzle; the movable ring is located at the end, away from the nozzle, of the exhaust ring, the shell is used for driving the movable ring to be away from a moving part of the exhaust ring at a constant speed, an exhaust port is formed in the side, facing the exhaust ring, of the movable ring, and the containing pipe further communicates with a hose communicating with the exhaust port. The explosion-proof barrier has the effect of enhancing the continuous stability of the explosion-proof barrier.

Description

Technical Field

[0001] This invention relates to the field of mine safety equipment, and in particular to an explosion-proof device for mine roadways. Background Technology

[0002] Mining explosion-proof devices are special electrical equipment designed for flammable and explosive environments such as underground coal mines. They are used to prevent electric sparks, arcs, or high temperatures from igniting explosive mixtures such as methane and coal dust. Among them, explosion-proof devices mainly use high-pressure gas to drive the spraying of extinguishing agents, which quickly form an explosion-suppressing barrier, thereby isolating the spread of flames.

[0003] Related technology can be found in Chinese Patent No. CN120626245B, which discloses a self-generating gas-type automatic explosion-proof device for mine roadways, belonging to the field of explosion-proof device technology. It includes a device body and a support frame installed on the outside of the device body. The device body includes a housing, a mounting ring, a junction box, a nozzle, a protective membrane, and a gas generator. The device body is fixed to the inner wall of the support frame by clamps and bolts. A protective assembly is installed inside the housing. Two protective plates in the protective assembly cooperate to isolate the dry powder extinguishing agent from contact with the protective membrane, preventing direct contact between the dry powder extinguishing agent and the protective membrane. This prevents the continuous low-frequency vibration when the device is not triggered from causing the dry powder extinguishing agent to rub back and forth on the surface of the protective membrane, thus preventing the membrane from being damaged or torn at weak points, leading to leakage of the dry powder extinguishing agent and subsequent overflow of high-pressure gas. This ensures sufficient dosage and pressure of the subsequently sprayed dry powder extinguishing agent, improving the explosion-proof effect.

[0004] Regarding the aforementioned technologies, in the event of an emergency, in addition to the gas flow generated by the explosion, there is usually a continuous flame. Therefore, the explosion-proof device needs to be continuous to ensure the explosion-proof effect of the explosion-proof barrier. However, in the existing technology, when the extinguishing agent is propelled by the air flow, it is difficult to control the amount of extinguishing agent sprayed during the initial explosion and the subsequent replenishment amount, which makes the continuous stability of the explosion-proof barrier weak. Summary of the Invention

[0005] To enhance the continuous stability of explosion-proof barriers, this application provides an explosion-proof device for mine roadways.

[0006] This application provides an explosion-proof device for mine roadways, employing the following technical solution: An explosion-proof device for a mine roadway includes a housing, a receiving tube fixed inside the housing, a gas-generating agent filled inside the receiving tube, a gas generator installed inside the receiving tube, a fire extinguishing agent filled between the housing and the receiving tube, and a nozzle for discharging the fire extinguishing agent at one end of the housing. The device also includes: An isolation membrane is installed at the nozzle and seals the nozzle; the isolation membrane ruptures when subjected to rated pressure. The detection unit, located on the outside of the housing and connected to the gas generator, is used to detect explosion hazards and control the gas generator to trigger when a hazard occurs. An exhaust ring is located between the housing and the receiving tube, and it divides the extinguishing agent into a front end and a rear end in the direction of the extinguishing agent pointing towards the nozzle. The front end is close to the nozzle, and the exhaust ring has an air outlet on the side facing the nozzle. An exhaust pipe is connected between the receiving pipe and the exhaust pipe, and the exhaust pipe is connected to the jet nozzle; The movable ring is located at the end of the exhaust ring away from the nozzle and is slidably connected to the housing along the axis of the exhaust ring. The housing is provided with a moving part, which is used to drive the movable ring away from the exhaust ring at a constant speed. The side of the movable ring facing the exhaust ring is provided with an exhaust port, and the receiving tube is also connected to a flexible hose that communicates with the exhaust port.

[0007] By adopting the above technical solution, the casing contains the extinguishing agent and prevents external substances from contaminating it through an isolation membrane. In the event of an emergency, the detection unit triggers and controls the gas generator to operate, causing the gas-generating agent in the container to produce a large amount of gas. The gas is discharged from the container pipe along the exhaust pipe and hose. The airflow along the exhaust pipe exits from the nozzle of the exhaust ring, causing the extinguishing agent at the front to break through the isolation membrane and be ejected, thus forming an explosion-proof barrier. In the subsequent process, the airflow ejected from the hose carries the extinguishing agent at the rear to be ejected from the nozzle. During this process, the moving part drives the movable ring to gradually move away from the exhaust ring, gradually driving the extinguishing agent to be ejected from front to back, thereby helping to ensure the spraying effect of the extinguishing agent and ensuring the continuous spraying effect of the extinguishing agent, thus improving the explosion-proof effect.

[0008] Optionally, it also includes: a reversing valve, disposed on the receiving pipe, for switching the connection between the receiving pipe and the exhaust pipe or hose.

[0009] By adopting the above technical solution, in the initial state, the receiving pipe is connected to the exhaust pipe. When gas is generated in the receiving pipe, the gas is first discharged through the exhaust pipe, thereby spraying out the extinguishing agent at the front end. After the extinguishing agent at the front end is sprayed out, the reversing valve switches and connects the hose to the receiving pipe, so that the airflow generated in the receiving pipe afterward flows to the extinguishing agent at the rear end. The airflow direction is distributed as needed, which helps to improve the working effect of the extinguishing agent.

[0010] Optionally, the barrier membrane includes an outer membrane and an inner membrane. The outer membrane and the inner membrane are parallel to each other and are both fixed to the nozzle. The inner membrane is located on the side of the outer membrane facing the extinguishing agent and prevents the extinguishing agent from directly contacting the outer membrane. The structural strength of the inner membrane is greater than that of the outer membrane. A puncture element is also provided on the shell. When the gas generator is triggered, the puncture element punctures and destroys the structure of the inner membrane.

[0011] By adopting the above technical solution, the inner membrane protects and blocks the extinguishing agent. By improving the structural strength of the inner membrane, the probability of the inner membrane being worn through by the extinguishing agent is reduced. When the gas generator is triggered, the puncture device first destroys the inner membrane, reducing the inner membrane's barrier to the extinguishing agent, so that the extinguishing agent only needs to break through the outer membrane. This reduces the probability of extinguishing agent leakage while reducing the obstruction encountered by the extinguishing agent during the spraying process.

[0012] Optionally, the puncture member includes a plurality of cutting blades, an elastic element, and a pushing element. The plurality of cutting blades are evenly distributed around the nozzle circumference and are slidably connected to the housing in a direction close to or away from the inner membrane. The elastic element is disposed between the housing and the cutting blades, and in its natural state, the elastic element pushes the cutting blades away from the inner membrane. The pushing element is connected to all the cutting blades and is used to push the cutting blades to divide the inner membrane.

[0013] By adopting the above technical solution, under the action of the elastic element, the cutting blades move away from the outer film. When the pushing element works, all the cutting blades cooperate to cut the inner film circumferentially, which helps to improve the uniformity of the inner film cutting and helps the extinguishing agent to penetrate the inner film.

[0014] Optionally, the pushing member includes a connecting rod and a piston rod. A movable hole is provided on the inner side of the housing along the length direction. The connecting rod is located in the movable hole and is slidably connected to the housing along the movable hole. All cutting blades are fixedly provided with the same connecting ring. The connecting rod is fixedly connected to the connecting ring. The cutting blades and the connecting ring are located between the inner layer film and the outer layer film. The cutting blades are arranged in the direction from the outer layer film to the inner layer film. A piston cylinder is fixedly connected to the side of the receiving tube away from the nozzle. The piston rod is located in the piston cylinder and is slidably connected to the piston cylinder along the axial direction. A flat rod is fixedly connected to the end of the connecting rod away from the nozzle. The end of the piston rod away from the nozzle passes through the piston cylinder and is fixedly connected to the flat rod. In the natural state of the elastic member, the end of the piston rod is close to the receiving tube.

[0015] By adopting the above technical solution, in the initial state, the piston rod is close to the receiving tube. When the gas in the receiving tube bursts, under the action of the piston cylinder, the piston rod drives the connecting rod to move through the flat rod, so that the moving rod drives the connecting ring to move, thereby enabling the cutting blade to overcome the resistance of the elastic element and cut the inner film. The movement of the cutting blade is directly controlled by the gas, so that the cutting blade moves synchronously during the gas generation process, which helps to improve the response speed of the cutting blade.

[0016] Optionally, the inner side of the housing has a movable groove along the length direction, and a movable ring is fixedly connected to a slider adapted to the movable groove. The slider is located in the movable groove and is slidably connected to the inner wall of the movable groove. The moving part is installed at the end of the housing away from the nozzle, and the moving part is activated after the receiving tube and the hose are connected, and drives the slider to move along the movable groove.

[0017] By adopting the above technical solution, the housing accommodates and guides the slider through the movable groove. When the moving part is working, it drives the slider to move along the movable groove, thereby driving the movable ring to move at a constant and stable speed.

[0018] Optionally, a sealing plate is fixedly connected to the housing along the length of the movable groove. The sealing plate prevents the extinguishing agent from entering the movable groove. A cutting blade is fixedly connected to the slider, which is directly opposite the end of the sealing plate. When the slider moves along the movable groove, the cutting blade cuts the sealing plate.

[0019] By adopting the above technical solution, the sealing plate prevents the extinguishing agent from entering the movable groove, thereby reducing the probability of the extinguishing agent interfering with the movement of the slider. When the movable ring moves, the sealing plate is cut by the cutting blade, thereby reducing the resistance caused by the sealing plate to the slider and the movable ring. When the winding component is not started, the slider is attracted and fixed by the magnetic positioning component, which helps to improve the placement stability of the movable ring.

[0020] Optionally, the movable ring is rotatably connected to a stirring ring on the side opposite to the exhaust ring. The stirring ring has several stirring blades arranged circumferentially on its inner side. The movable ring is provided with a transmission component connected to the stirring ring. When the movable ring moves along the movable groove, the transmission component drives the stirring ring to rotate.

[0021] By adopting the above technical solution, the moving ring moves under the action of the transmission component, causing the stirring ring to rotate. This causes the stirring ring to drive the stirring blade to cut the extinguishing agent, thereby helping to reduce the probability of the extinguishing agent clumping and affecting the extinguishing effect.

[0022] Optionally, the exhaust port is divided into a main nozzle and a secondary nozzle. The main nozzle is located on the side of the movable ring facing the exhaust ring and is arranged circumferentially along the movable ring. The secondary nozzle is located on the side of the movable ring away from the exhaust port. Both the main nozzle and the secondary nozzle are connected to the hose, and the diameter of the main nozzle is larger than the diameter of the secondary nozzle.

[0023] By adopting the above technical solution, the airflow ejected from the secondary nozzle blows the stationary extinguishing agent, thereby causing the extinguishing agent to be lifted and ejected from the casing along with the airflow ejected from the main nozzle, which helps to improve the diffusion effect of the extinguishing agent.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The housing contains the extinguishing agent and prevents external substances from contaminating it through an isolation membrane. In the event of an emergency, the detection unit triggers and controls the gas generator, causing the gas-generating agent in the housing to produce a large amount of gas. The gas is discharged from the housing pipe along the exhaust pipe and hose. The airflow along the exhaust pipe exits from the nozzle of the exhaust ring, causing the extinguishing agent at the front to break through the isolation membrane and be ejected, thus forming an explosion-proof barrier. In the subsequent process, the airflow ejected from the hose carries the extinguishing agent at the rear to be ejected from the nozzle. During this process, the moving part drives the movable ring to gradually move away from the exhaust ring, gradually driving the extinguishing agent to be ejected from front to back, thereby helping to ensure the spraying effect of the extinguishing agent and ensuring the continuous spraying effect of the extinguishing agent, thus improving the explosion-proof effect. 2. In the initial state, the receiving pipe is connected to the exhaust pipe. When gas is generated in the receiving pipe, the gas is first discharged through the exhaust pipe, thereby spraying out the extinguishing agent at the front end. After the extinguishing agent at the front end is sprayed out, the reversing valve switches and connects the hose to the receiving pipe, so that the airflow generated in the receiving pipe afterward flows to the extinguishing agent at the rear end. The airflow direction is distributed as needed, which helps to improve the working effect of the extinguishing agent. 3. In the initial state, the piston rod is close to the receiving tube. When the gas in the receiving tube explodes, under the action of the piston cylinder, the piston rod drives the connecting rod to move through the flat rod, so that the moving rod drives the connecting ring to move, thereby enabling the cutting blade to overcome the resistance of the elastic element and cut the inner film. The movement of the cutting blade is directly controlled by the gas, so that the cutting blade moves synchronously during the gas generation process, which helps to improve the response speed of the cutting blade. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0026] Figure 2 This is a schematic diagram designed to highlight the positions of the exhaust ring and the moving ring.

[0027] Figure 3 This is a schematic diagram designed to highlight the installation structure of the stirring ring.

[0028] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Nozzle; 12. Movable groove; 13. Sealing plate; 2. Receiving tube; 21. Gas generator; 22. Piston tube; 3. Isolation membrane; 31. Outer membrane; 32. Inner membrane; 4. Detection unit; 5. Exhaust ring; 51. Jet nozzle; 61. Exhaust pipe; 62. Hose; 63. Reversing valve; 7. Movable ring; 71. Exhaust port; 711. Main nozzle; 712. Secondary nozzle; 72. Slider; 73. Cutting blade; 74. Stirring ring; 741. Stirring blade; 751. Rack; 752. Gear set; 8. Moving part; 91. Cutting blade; 92. Elastic part; 931. Connecting rod; 932. Piston rod; 933. Flat rod; 94. Connecting ring. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] This application discloses an explosion-proof device for mine roadways.

[0031] Example Reference Figure 1 and Figure 2 An explosion-proof device for mine roadways includes a housing 1, within which a receiving cylinder is installed, containing a gas-generating agent. A gas generator 21 is also installed inside the receiving cylinder; when triggered, the gas-generating agent reacts, generating a large amount of gas within the receiving cylinder. A detection unit 4 is installed on the outside of the housing 1, comprising a gas detection sensor, a temperature detection sensor, and a gas pressure detection sensor. In the event of an explosion hazard, triggering any of these sensors will activate the gas-generating point.

[0032] Reference Figure 2 and Figure 3 One end of the housing 1 is connected to a nozzle 11, and an isolation membrane 3 is provided at the nozzle 11. The isolation membrane 3 includes an inner membrane 32 and an outer membrane 31, wherein the inner membrane 32 is located on the side of the outer membrane 31 facing the extinguishing agent and seals the extinguishing agent. The inner membrane 32 has greater strength and abrasion resistance than the outer membrane 31, thereby reducing the probability of extinguishing agent leakage or contamination. An annular cavity is left between the receiving tube 2 and the housing 1, and the annular cavity is filled with extinguishing agent. An exhaust ring 5 is fixed inside the housing 1, which divides the fire extinguisher into a front end and a rear end, wherein the front end is located between the exhaust ring 5 and the inner membrane 32.

[0033] Reference Figure 2 and Figure 3 A movable ring 7 is provided on the inner side of the housing 1. The movable ring 7 is located on the side of the exhaust ring 5 away from the nozzle 11. A movable groove 12 is formed along the length of the housing 1. A slider 72 corresponding to the movable groove 12 is fixedly connected to the outer side of the movable ring 7. The slider 72 is located in the movable groove 12 and contacts the inner wall of the movable groove 12. The housing 1 supports and guides the slider 72 through the movable groove 12, so that the movable ring 7 can move stably along the movable groove 12.

[0034] Reference Figure 2 and Figure 3 The housing 1 is provided with a movable component 8. In this embodiment, the movable component 8 includes a motor and a lead screw. The lead screw is located in any movable slot 12 and is rotatably connected to the housing 1 around its own axis. The lead screw passes through the slider 72 in the corresponding receiving slot and is threadedly connected to the slider 72. When the lead screw rotates, it drives the corresponding slider 72 to move along the movable slot 12. The motor is mounted on the housing 1 to drive the lead screw to rotate.

[0035] Reference Figure 2 and Figure 3 A sealing plate 13 is fixedly attached to the inner wall of the movable groove 12. The sealing plate 13 seals the movable groove 12, thereby preventing the extinguishing agent from entering the movable groove 12. The sealing plate 13 is made of a deformable material, such as wax, paper, or plastic. A cutting blade 73 is fixedly connected to the slider 72, which is directly opposite the sealing plate 13. When the slider 72 moves away from the exhaust ring 5, the slider 72 cuts the sealing plate 13 with the cutting blade 73, thereby reducing the resistance caused by the sealing plate 13 to the slider 72.

[0036] Reference Figure 2 and Figure 3 An exhaust ring 5 has a jet port 51 circumferentially opened on the side facing the nozzle 11. An exhaust pipe 61 is provided inside the housing 1, located in any movable slot 12, and one end of the exhaust pipe 61 is connected to the jet port 51. The movable ring 7 is provided with an exhaust port 71, which includes a main nozzle 711 and a secondary nozzle 712. The main nozzle 711 is located on the side of the movable ring 7 facing the nozzle, and the secondary nozzle 712 is located on the side of the movable ring 7 away from the nozzle, and the diameter of the secondary nozzle 712 is smaller than that of the main nozzle 711. The receiving pipe 2 is also connected to a hose 62, which is located in another receiving slot, and its other end is connected to both the main nozzle 711 and the secondary nozzle 712. The receiving pipe 2 is also equipped with a reversing valve 63, which is used to control the connection or disconnection between the receiving pipe 2 and the exhaust pipe 61 or the hose 62. In the initial state, the receiving pipe 2 is connected to the exhaust pipe 61.

[0037] Reference Figure 2 and Figure 3 When the detection unit 4 detects a hazard, the gas generator 21 is triggered, causing the gas-generating agent in the containment tube 2 to produce a large amount of gas. The gas then flows from the exhaust pipe 61 to the exhaust ring 5. After being ejected from the nozzle 51, the gas drives the extinguishing agent at the front end to move towards the nozzle 11. Furthermore, to facilitate the extinguishing agent's penetration of the inner membrane 32, a piercing element is provided between the inner membrane 32 and the outer membrane 31. The piercing element includes an elastic element 92, multiple cutting blades 91, and a pushing element. All cutting blades 91 are evenly distributed around the nozzle 11 and are slidably connected to the housing 1 in the direction close to or away from the inner membrane 32. All cutting blades 91 are connected to the same connecting ring 94. The elastic element 92 is installed between the connecting ring 94 and the housing 1. The elastic element 92 is a spring, with one end abutting against the connecting ring 94 and the other end abutting against the housing 1. In its natural state, the elastic element 92 pushes the connecting ring 94 away from the inner membrane 32.

[0038] Reference Figure 2 and Figure 3The pushing component includes a connecting rod 931 and a piston rod 932. A piston cylinder is fixedly connected to the end of the receiving tube 2 away from the nozzle 11. The piston rod 932 is located inside the piston cylinder and is slidably connected to the piston cylinder along its axial direction. The end of the piston rod 932 away from the nozzle 11 passes through the piston cylinder and extends to the outside of the piston cylinder. The connecting rod 931 is arranged along the axial direction of the housing 1, and the housing 1 has a movable hole for the connecting rod 931 to move. One end of the connecting rod 931 is fixedly connected to a connecting ring 94, and the connecting rod 931 moves along the movable hole, causing the connecting ring 94 to move.

[0039] Reference Figure 2 and Figure 3 A flat rod 933 is fixedly connected to the end of the connecting rod 931 away from the nozzle 11, and a flat rod 933 is fixedly connected to the end of the piston rod 932 away from the nozzle 11. Under the action of the elastic element 92, the piston rod 932 is initially close to the receiving tube 2. When high-pressure gas is generated in the receiving tube 2, the piston rod 932 is pushed by the gas pressure, causing the piston rod 932 to quickly move away from the receiving tube 2. Under the connecting action of the flat rod 933, the piston rod 932 moves, driving the connecting rod 931 to move, so that the connecting rod 931 drives the connecting ring 94 to overcome the resistance of the elastic element 92 and move towards the inner membrane 32.

[0040] Reference Figure 2 and Figure 3 As the connecting ring 94 moves, the cutting disc 91 punctures and cuts the inner membrane 32, thereby reducing the resistance encountered by the extinguishing agent when it breaks through the inner membrane 32. The puncture process of the inner membrane precedes the ejection process of the extinguishing agent. At this time, the outer membrane 31 blocks the extinguishing agent, which helps to ensure the explosion effect of the extinguishing agent. After the extinguishing agent at the front end breaks through the outer membrane 31, it is ejected from the nozzle 11, thus forming an explosion barrier. After the gas generator 21 is triggered, the reversing valve 63 and the motor are triggered in sequence. When the reversing valve 63 is working, it cuts off the exhaust pipe 61 from the receiving pipe 2 and connects the hose 62 to the receiving pipe 2. This allows the gas in the receiving pipe 2 to enter the hose 62 and move towards the movable ring 7.

[0041] Reference Figure 2 and Figure 3 After the gas is ejected from the main nozzle 711, it drives the extinguishing agent at the rear end to continue to be ejected from the nozzle. During this process, the gas ejected from the secondary nozzle 712 blows the extinguishing agent that has not been lifted, thereby improving the ejection effect of the extinguishing agent. The extinguishing agent is sprayed twice in succession. After the explosion barrier is formed, the extinguishing agent is continuously replenished, which helps to improve the sustainability of the explosion barrier.

[0042] Reference Figure 2 and Figure 3During the replenishment of extinguishing agent, the motor drives the movable ring 7 away from the exhaust ring 5 at a constant speed via a lead screw, thereby maintaining an optimal distance between the movable ring 7 and the remaining extinguishing agent inside the housing 1, facilitating the removal of the extinguishing agent from the housing 1 by gas. A stirring ring 74 is coaxially rotatably connected to the side of the movable ring 7 away from the exhaust ring 5, and multiple stirring blades 741 are fixedly connected circumferentially to the inner side of the stirring ring 74.

[0043] Reference Figure 2 and Figure 3 The movable ring 7 is equipped with a transmission component. When the movable ring 7 moves, the transmission component drives the stirring ring 74 to rotate. Specifically, the transmission component includes a gear set 752 and a rack 751. The rack 751 is embedded in the inner wall of the movable groove 12 and is arranged along the length of the movable groove 12. The gear set 752 is mounted on the slider 72 and is arranged between the rack 751 and the drive ring. Under the action of the rack 751, when the slider 72 moves along the movable groove 12, the gear set 752 drives the drive ring to rotate. By utilizing the transmission and steering action of the gears, the movable ring 7 moves and drives the stirring ring 74 to rotate synchronously. This allows the stirring ring 74 to stir the extinguishing agent through the stirring blade 741, reducing the probability of the extinguishing agent agglomerating and affecting its use.

[0044] The implementation principle of an explosion-proof device for a mine roadway according to an embodiment of this application is as follows: An exhaust ring 5 and a movable ring 7 are installed inside the housing 1 to divide the extinguishing agent into a front and rear end. When the gas generator 21 is triggered and a large amount of gas is generated in the receiving pipe 2, the gas is guided to the jet nozzle 51 of the exhaust ring 5 through the exhaust pipe 61, thereby spraying out the extinguishing agent at the front end, thus forming an explosion-proof barrier. Furthermore, the movable ring 7 is subsequently moved, causing the remaining airflow in the receiving pipe 2 to carry the extinguishing agent at the rear end to continue to rise and be sprayed out from the nozzle 11, thereby continuously replenishing the extinguishing agent, improving the continuity of the explosion-proof barrier, and further enhancing the safety effect. The inner membrane 32 is made of wear-resistant material, which helps reduce the probability of the extinguishing agent being contaminated. Furthermore, by setting a cutting disc 91, the inner membrane 32 is pre-damaged when the gas generator 21 is triggered, thereby helping to reduce the resistance encountered by the extinguishing agent at the front end during explosion.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An explosion-proof device for a mine roadway, comprising a housing (1), a receiving tube (2) fixedly disposed inside the housing (1), the receiving tube (2) being filled with a gas-generating agent, and a gas generator (21) being disposed inside the receiving tube (2), a fire extinguishing agent being filled between the housing (1) and the receiving tube (2), and a nozzle (11) for discharging the fire extinguishing agent being disposed at one end of the housing (1), characterized in that, Also includes: An isolation membrane (3) is installed at the nozzle (11) and seals the nozzle (11). When subjected to rated pressure, the isolation membrane (3) ruptures. The detection unit (4) is located outside the housing (1) and connected to the gas generator (21) to detect explosion hazards and control the gas generator (21) to trigger when an hazard occurs. An exhaust ring (5) is located between the housing (1) and the receiving tube (2), and divides the extinguishing agent into a front end and a rear end along the direction of the extinguishing agent pointing to the nozzle (11), wherein the front end is close to the nozzle (11), and the exhaust ring (5) has an air outlet (51) on the side facing the nozzle (11). An exhaust pipe (61) is connected between the receiving pipe (2) and the exhaust pipe (61), and the exhaust pipe (61) is connected to the jet nozzle (51); The movable ring (7) is located at the end of the exhaust ring (5) away from the nozzle (11) and is slidably connected to the housing (1) along the axis of the exhaust ring (5). The housing (1) is provided with a moving part (8), which is used to drive the movable ring (7) away from the exhaust ring (5) at a constant speed. The movable ring (7) is provided with an exhaust port (71) on the side facing the exhaust ring (5). The receiving tube (2) is also connected to a flexible tube (62) that is connected to the exhaust port (71).

2. The explosion-proof device for mine roadways according to claim 1, characterized in that, It also includes: a reversing valve (63), which is installed on the receiving pipe (2) and is used to switch the connection between the receiving pipe (2) and the exhaust pipe (61) or the hose (62).

3. The explosion-proof device for mine roadways according to claim 1, characterized in that: The barrier membrane includes an outer membrane (31) and an inner membrane (32). The outer membrane (31) and the inner membrane (32) are parallel to each other and are both fixed to the nozzle (11). The inner membrane (32) is located on the side of the outer membrane (31) facing the extinguishing agent and prevents the extinguishing agent from directly contacting the outer membrane (31). The structural strength of the inner membrane (32) is greater than that of the outer membrane (31). A puncture element is also provided on the shell (1). When the gas generator (21) is triggered, the puncture element punctures and destroys the structure of the inner membrane (32).

4. The explosion-proof device for mine roadways according to claim 3, characterized in that: The puncture device includes a plurality of cutting blades (91), an elastic element (92), and a pushing element. The plurality of cutting blades (91) are evenly distributed around the nozzle (11) and are slidably connected to the housing (1) in the direction of being close to or away from the inner membrane (32). The elastic element (92) is disposed between the housing (1) and the cutting blades (91), and the elastic element (92) pushes the cutting blades (91) away from the inner membrane (32) in its natural state. The pushing element is connected to all the cutting blades (91) and is used to push the cutting blades (91) to divide the inner membrane (32).

5. The explosion-proof device for a mine roadway according to claim 4, characterized in that: The pushing component includes a connecting rod (931) and a piston rod (932). A movable hole is provided along the length of the inner side of the housing (1). The connecting rod (931) is located within the movable hole and is slidably connected to the housing (1) along the movable hole. All cutting blades (91) are fixedly provided with the same connecting ring (94). The connecting rod (931) and the connecting ring (94) are fixedly connected. Both the cutting blades (91) and the connecting ring (94) are located between the inner membrane (32) and the outer membrane (31), and the cutting blades (91) are along the outer membrane (31). The piston cylinder is fixedly connected to the side of the receiving tube (2) away from the nozzle (11) and the direction of the inner membrane (32) is facing. The piston rod (932) is located inside the piston cylinder and is slidably connected to the piston cylinder along the axial direction. The end of the connecting rod (931) away from the nozzle (11) is fixedly connected to the flat rod (933). The end of the piston rod (932) away from the nozzle (11) passes through the piston cylinder and is fixedly connected to the flat rod (933). In the natural state of the elastic element (92), the end of the piston rod (932) is close to the receiving tube (2).

6. The explosion-proof device for a mine roadway according to claim 2, characterized in that: The inner side of the housing (1) has a movable groove (12) along the length direction. The movable ring (7) is fixedly connected to a slider (72) that is adapted to the movable groove (12). The slider (72) is located in the movable groove (12) and is slidably connected to the inner wall of the movable groove (12). The moving part (8) is installed at the end of the housing (1) away from the nozzle (11). The moving part (8) is activated after the receiving tube (2) and the hose (62) are connected, and drives the slider (72) to move along the movable groove (12).

7. The explosion-proof device for mine roadways according to claim 6, characterized in that: The housing (1) is fixedly connected with a sealing plate (13) along the length of the movable groove (12). The sealing plate (13) prevents the extinguishing agent from entering the movable groove (12). The slider (72) is fixedly connected with a cutting blade (73) that is directly opposite the end of the sealing plate (13). When the slider (72) moves along the movable groove (12), it cuts the sealing plate (13) with the cutting blade (73).

8. The explosion-proof device for a mine roadway according to claim 6, characterized in that: The movable ring (7) is rotatably connected to a stirring ring (74) on the side away from the exhaust ring (5). Several stirring blades (741) are arranged circumferentially on the inner side of the stirring ring (74). The movable ring (7) is provided with a transmission component connected to the stirring ring (74). When the movable ring (7) moves along the movable groove (12), the transmission component drives the stirring ring (74) to rotate.

9. The explosion-proof device for mine roadways according to claim 1, characterized in that: The exhaust port (71) is divided into a main nozzle (711) and a secondary nozzle (712). The main nozzle (711) is located on the side of the movable ring (7) facing the exhaust ring (5) and is arranged around the circumference of the movable ring (7). The secondary nozzle (712) is located on the side of the movable ring (7) away from the exhaust port (71). Both the main nozzle (711) and the secondary nozzle (712) are connected to the hose (62), and the diameter of the main nozzle (711) is larger than the diameter of the secondary nozzle (712).

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