An automatic explosion-proof device

Abstract

An automatic explosion-proof device includes a triggering device, a pressure-storing liquid storage device, a shock wave receiving and sensing device, and a spraying device. The triggering device includes a sleeve and a trigger piston disposed within the sleeve. The sleeve has a first inlet hole, and the pressure-storing liquid storage device communicates with the first inlet hole. The trigger piston has a hollow structure with a second inlet hole communicating with the hollow structure. The trigger piston has a first sealing part that can block the first inlet hole. One end of the trigger piston is connected to the shock wave receiving and sensing device. The hollow structure of the trigger piston communicates with the spraying device. Through the coordinated design of the pressure-storing liquid storage device and the triggering device, the need for regular inspection and replacement of the extinguishing medium is eliminated, increasing safety and reducing costs. The extinguishing liquid is sprayed from the spraying device under high pressure, reducing unnecessary personnel casualties. The triggering structure is simple, low in manufacturing cost, easy to install, and highly efficient in use.

Description

Technical Field

[0001] This utility model belongs to the technical field of mine safety equipment, specifically relating to an automatic explosion-proof device. Background Technology

[0002] Safety during construction in mines has always been a crucial issue in the mining industry, and ensuring safety during underground operations is clearly stipulated in relevant national standards.

[0003] Automatic explosion-proof devices are key equipment to prevent the spread of flames after an explosion in a mine. The working principle is that when an explosion occurs, the shock wave will reach the explosion-proof device before the flame. Therefore, the shock wave generated by the explosion will trigger the explosion-proof main unit. After triggering, under the action of high-pressure gas, the extinguishing powder in the storage hood will be sprayed out through the powder spraying nozzle to block the flame transmission.

[0004] However, the existing technology has the following drawbacks: 1. The extinguishing powder needs to be inspected and replaced regularly, otherwise it will clump together and cannot effectively stop the explosion in the event of an explosion, causing devastating damage to the entire underground construction; 2. The simultaneous spraying of high-pressure gas and extinguishing powder will have a strong impact on nearby workers, causing unnecessary casualties; 3. It is a one-way trigger, meaning that the explosion-proof main unit can only be triggered when an explosion occurs on the side where the shock wave receiver is located. Therefore, two explosion-proof devices are usually installed opposite each other in the tunnel to extinguish an explosion that occurs on either side, but this approach undoubtedly increases the cost of use. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, this utility model aims to provide an automatic explosion-proof device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows.

[0007] An automatic explosion-proof device includes a triggering device, a pressure-storing and liquid-retaining device, a shock wave receiving and sensing device, and a spraying device. The triggering device includes a sleeve and a trigger piston disposed within the sleeve. The sleeve has a first inlet hole, and the pressure-storing and liquid-retaining device communicates with the first inlet hole. The trigger piston has a hollow structure with a second inlet hole communicating with the hollow structure. The trigger piston has a first sealing part that can block the first inlet hole. One end of the trigger piston is connected to the shock wave receiving and sensing device, and the hollow structure of the trigger piston communicates with the spraying device. The pressure-storing and liquid-retaining device can be connected to the first inlet hole via a pipeline. A seal has been applied between the sleeve and the trigger piston to prevent high-pressure liquid leakage.

[0008] A further preferred embodiment is that the other end of the trigger piston is connected to the shock wave receiving and sensing device, the first sealing part divides the hollow structure of the trigger piston into a left chamber and a right chamber, and two second inlet holes are respectively located on the left and right sides of the first sealing part, communicating with the left chamber and the right chamber, and the left chamber and the right chamber are respectively connected to their respective spraying devices.

[0009] A further preferred embodiment is that the sleeve is provided with a liquid passage. When a shock wave arrives, the first sealing part moves to expose the first inlet hole, and the first inlet hole and the second inlet hole are connected through the liquid passage. The liquid passage increases the docking space between the first inlet hole and the second inlet hole, preventing the first inlet hole from failing to align and connect with the second inlet hole after the first sealing part and the trigger piston move due to the shock wave, thus preventing the high-pressure liquid from being sprayed out to extinguish the fire.

[0010] A further preferred embodiment is that the liquid passage is formed by the space enclosed by the inner wall of the sleeve, the first sealing part, and the outer wall of the trigger piston.

[0011] A further preferred embodiment is that a second sealing part is provided on the right side of the trigger piston away from the first sealing part, and the liquid passage is formed by the space enclosed by the inner wall of the right side of the sleeve, the first sealing part, the outer wall of the trigger piston, and the second sealing part.

[0012] A further preferred embodiment is that a second liquid channel and a first liquid passage are respectively provided on the left and right sides of the first sealing part. The first liquid passage is formed by the space enclosed by the inner wall of the right side of the sleeve, the first sealing part, and the outer wall of the trigger piston. The second liquid passage is formed by the space enclosed by the inner wall of the left side of the sleeve, the first sealing part, and the outer wall of the trigger piston.

[0013] A further preferred embodiment is that a third sealing part and a second sealing part are provided on both sides of the trigger piston away from the first sealing part. The first liquid passage is formed by the space enclosed by the right inner wall of the sleeve, the first sealing part, the outer wall of the trigger piston, and the second sealing part. The second liquid passage is formed by the space enclosed by the left inner wall of the sleeve, the first sealing part, the outer wall of the trigger piston, and the third sealing part.

[0014] A further preferred embodiment is that the shock wave receiving and sensing device consists of a shock wave receiver and is connected to the trigger piston.

[0015] A further preferred embodiment is that the shock wave receiving and sensing device consists of a shock wave receiver and a push rod, the shock wave receiver is mounted on the push rod, the push rod has a hollow structure, and the trigger piston is connected to the spraying device through the push rod.

[0016] A further preferred embodiment is that the high-pressure fire extinguishing liquid stored in the pressure storage device can be high-pressure carbon dioxide liquid, high-pressure liquid nitrogen, or a mixture of high-pressure gas and water.

[0017] A further preferred embodiment is that there are at least two pressure storage and liquid storage devices, and at least two spraying devices on one side of the trigger piston, which are connected to the hollow structure of the trigger piston (12).

[0018] A further preferred embodiment is that the pressurized liquid storage devices are connected in parallel via T-junctions, with a check valve and a shut-off valve installed on each parallel connection pipeline. The spraying devices are also connected in parallel via T-junctions. This parallel design of multiple pressurized liquid storage devices increases the quantity of extinguishing media, correspondingly increasing the extinguishing time. The check valves prevent backflow of high-pressure liquid, and the shut-off valves control the high-pressure liquid in the pressurized liquid storage devices to be in a ready-to-spray or prohibited-from-spray state. The parallel connection of multiple spraying devices increases the extinguishing range.

[0019] This invention offers the following advantages over existing technologies: By combining a pressurized liquid storage device with a triggering device, the need for regular inspection and replacement of the extinguishing medium is eliminated, extending the service life of the explosion-proof device and preventing the failure to effectively halt the spread of an explosion, thus increasing safety and reducing operating costs. The extinguishing liquid is sprayed from the spraying device under high pressure, avoiding the direct impact of a high-pressure gas-extinguishing powder mixture on nearby workers and reducing unnecessary casualties. The triggering structure is simple, low-cost, easy to install, and highly efficient. The combination of the pressurized liquid storage device and the triggering device, along with the left and right liquid passages within the triggering device and shock wave receiving sensors connected to both ends of the trigger piston, ensures that an explosion on either side of the tunnel can trigger extinguishing, improving safety and reducing costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the structure in the working state of the first embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0023] Figure 4This is a schematic diagram of the third embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the fourth embodiment of the present utility model.

[0025] Figure 6 This is a structural schematic diagram of the fourth embodiment of the present invention in its working state.

[0026] Figure 7 This is a schematic diagram of the fifth embodiment of the present utility model.

[0027] Figure 8 This is a schematic diagram of the sixth embodiment of the present utility model.

[0028] Among them, 1. triggering device; 11. sleeve; 111. first inlet hole; 12. triggering piston; 121. first sealing part; 122. second inlet hole; 123. second sealing part; 124. right chamber; 125. left chamber; 126. third sealing part.

[0029] 2. Pressure storage and liquid storage device.

[0030] 3. Shock wave receiving sensor; 31. Shock wave receiver; 32. Push rod.

[0031] 4. Spraying device.

[0032] 5. Liquid passage; 51. First liquid passage; Second liquid passage.

[0033] 6. Tee fittings.

[0034] 7. Check valve.

[0035] 8. Shut-off valve.

[0036] 9. Sealing ring. Implementation

[0037] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0038] Meanwhile, the terms “center,” “longitudinal,” “lateral,” “up,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application.

[0039] First embodiment

[0040] As attached Figure 1 and Figure 2 As shown, an automatic explosion-proof device includes a triggering device 1, a pressure storage device 2 storing high-pressure fire extinguishing liquid, a shock wave receiving sensor 3, and a spraying device 4. The triggering device 1 includes a sleeve 11 and a triggering piston 12 disposed within the sleeve 11. The sleeve 11 is provided with a first inlet hole 111, and the pressure storage device 2 communicates with the first inlet hole 111. The triggering piston 12 is a hollow structure, and is provided with a second inlet hole 122 communicating with the hollow structure. The triggering piston 12 is provided with a first sealing part 121 that can block the first inlet hole 111. One end of the triggering piston 12 is connected to the shock wave receiving sensor 3, and the hollow structure of the triggering piston 12 is connected to the spraying device 4.

[0041] When the shock wave arrives, the shock wave receiving and sensing device 3 receives the force of the shock wave and pushes the trigger piston 12 to move inside the sleeve 11, causing the first sealing part 121 to move and expose the first inlet hole 111 on the sleeve 11. At this time, the first inlet hole 111 is connected to the second inlet hole 122. The high-pressure liquid in the pressure storage and liquid storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire.

[0042] The sleeve 11 is provided with a liquid passage 5, which increases the docking space between the first inlet hole 111 and the second inlet hole 122. This prevents the first inlet hole 111 and the second inlet hole 122 from failing to be directly aligned and connected after the first sealing part 121 and the trigger piston 12 move due to the shock wave, thus preventing the high-pressure liquid from being sprayed out to extinguish the fire.

[0043] The liquid passage 5 is formed by the space enclosed by the inner wall of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. Taking the first sealing part 121 and the trigger piston 12 as cylindrical as an example, the diameter of the first sealing part 121 is larger than the diameter of the trigger piston 12 and fits tightly against the inner wall of the sleeve 11, thereby forming the liquid passage 5, which facilitates the passage of high-pressure liquid.

[0044] A second sealing part 123 is provided on the trigger piston 12 at a position away from the first sealing part 121. The liquid passage 5 is formed by the space enclosed by the inner wall of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the second sealing part 123. Taking the first sealing part 121, the second sealing part 123, and the trigger piston 12 as cylindrical as an example, the diameters of the first sealing part 121 and the second sealing part 123 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the liquid passage 5. This facilitates the passage of high-pressure liquid and, more effectively, prevents high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the liquid passage 5.

[0045] The shock wave receiving and sensing device 3 consists of a shock wave receiver 31 and a push rod 32. The shock wave receiver 31 is mounted on the push rod 32, which has a hollow structure. The trigger piston 12 is connected to the spraying device 4 through the push rod 32. The shock wave is received by the shock wave receiver 31, which causes the push rod 32 to push the trigger piston 12 to move within the sleeve 11. When the first sealing part 121 moves to expose the first inlet hole 111 on the sleeve 11, the first inlet hole 111 and the second inlet hole 122 are connected through the liquid passage 5. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 and the hollow push rod 32 to extinguish the fire.

[0046] The high-pressure fire extinguishing liquid stored in the pressure storage device 2 can be high-pressure carbon dioxide liquid, high-pressure liquid nitrogen, or a mixture of high-pressure gas and water, etc.

[0047] Second embodiment

[0048] As attached Figure 3As shown, an automatic explosion-proof device includes a triggering device 1, a pressure storage device 2 storing high-pressure fire extinguishing liquid, a shock wave receiving sensor 3, and a spraying device 4. The triggering device 1 includes a sleeve 11 and a trigger piston 12 disposed within the sleeve 11. The sleeve 11 has a first inlet hole 111, and the pressure storage device 2 communicates with the first inlet hole 111. The trigger piston 12 has a hollow structure and a second inlet hole 122 communicating with the hollow structure. The trigger piston 12 has a first sealing part 121 that can block the first inlet hole 111. One end of the trigger piston 12 is connected to the shock wave receiving sensor 3, and the hollow structure of the trigger piston 12 communicates with the spraying device 4. The shock wave receiving sensor 3 consists of a shock wave receiver 31, which is directly disposed on the trigger piston 12.

[0049] When the shock wave arrives, the shock wave receiver 31 of the shock wave receiving and sensing device 3 receives the force of the shock wave and pushes the trigger piston 12 to move inside the sleeve 11, causing the first sealing part 121 to move and expose the first inlet hole 111 on the sleeve 11. At this time, the first inlet hole 111 is connected to the second inlet hole 122. The high-pressure liquid in the pressure storage and liquid storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire.

[0050] The sleeve 11 is provided with a liquid passage 5, which increases the docking space between the first inlet hole 111 and the second inlet hole 122. This prevents the first inlet hole 111 and the second inlet hole 122 from failing to be directly aligned and connected after the first sealing part 121 and the trigger piston 12 move due to the shock wave, thus preventing the high-pressure liquid from being sprayed out to extinguish the fire.

[0051] The liquid passage 5 is formed by the space enclosed by the inner wall of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. Taking the first sealing part 121 and the trigger piston 12 as cylindrical as an example, the diameter of the first sealing part 121 is larger than the diameter of the trigger piston 12 and fits tightly against the inner wall of the sleeve 11, thereby forming the liquid passage 5, which facilitates the passage of high-pressure liquid.

[0052] A second sealing part 123 is provided on the trigger piston 12 at a position away from the first sealing part 121. The liquid passage 5 is formed by the space enclosed by the inner wall of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the second sealing part 123. Taking the first sealing part 121, the second sealing part 123, and the trigger piston 12 as cylindrical as an example, the diameters of the first sealing part 121 and the second sealing part 123 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the liquid passage 5. This facilitates the passage of high-pressure liquid and, more effectively, prevents high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the liquid passage 5.

[0053] The high-pressure fire extinguishing liquid stored in the pressure storage device 2 can be high-pressure carbon dioxide liquid, high-pressure liquid nitrogen, or a mixture of high-pressure gas and water, etc.

[0054] Third embodiment

[0055] As attached Figure 4 As shown, an automatic explosion-proof device, based on the first embodiment, includes at least two pressurized liquid storage devices 2 and at least two spraying devices 4. The pressurized liquid storage devices 2 are connected in parallel via tee fittings 6, and each parallel connection pipeline is equipped with a check valve 7 and a shut-off valve 8. The spraying devices 4 are also connected in parallel via tee fittings 6. The parallel design of multiple pressurized liquid storage devices 2 increases the amount of extinguishing medium and correspondingly increases the extinguishing time. The parallel design of multiple spraying devices increases the extinguishing range. A check valve 7 is installed on the pipeline connecting the pressure storage device 2 and the first inlet port 111 to prevent backflow of high-pressure liquid. A shut-off valve 8 is installed to control the high-pressure liquid in the pressure storage device 2 to be in a state ready to be sprayed or a state prohibited from spraying. For example, closing the shut-off valve 8 during transportation can effectively prevent the trigger piston 12 from moving the first sealing part 121 under bumpy conditions, causing the first inlet port 111 to connect with the second inlet port 122 and resulting in the high-pressure liquid being sprayed out. Or, when pressurizing and filling the pressure storage device 2, it can prevent accidental contact that causes the trigger piston 12 to move the first sealing part 121, causing the first inlet port 111 to connect with the second inlet port 122 and resulting in the high-pressure liquid being sprayed out.

[0056] Fourth embodiment

[0057] As attached Figure 5 and Figure 6As shown, an automatic explosion-proof device includes a triggering device 1, a pressure-storing liquid storage device 2 containing high-pressure fire extinguishing liquid, a shock wave receiving sensor 3, and a spraying device 4. The triggering device 1 includes a sleeve 11 and a triggering piston 12 disposed within the sleeve 11. The sleeve 11 has a first inlet hole 111, and the pressure-storing liquid storage device 2 communicates with the first inlet hole 111. The triggering piston 12 is a hollow structure with a second inlet hole 122 communicating with the hollow structure. The triggering piston 12 has a first sealing part 121 that can block the first inlet hole 111. One end of the trigger piston 12 is connected to the shock wave receiving sensor 3, and the hollow structure of the trigger piston 12 is connected to the spraying device 4. The other end of the trigger piston 12 is connected to the shock wave receiving sensor 3. The first sealing part 121 divides the hollow structure of the trigger piston 12 into a left chamber 125 and a right chamber 124. There are two second inlet holes 122 respectively located on the left and right sides of the first sealing part 121, which are connected to the left chamber 125 and the right chamber 124. The left chamber 125 and the right chamber 124 are respectively connected to their respective spraying devices 4.

[0058] When the shock wave arrives from the right, the shock wave receiving and sensing device 3 connected to the right end of the trigger piston 12 receives the force of the shock wave and pushes the trigger piston 12 to move to the left inside the sleeve 11, causing the first sealing part 121 to move and expose the first inlet hole 111 on the sleeve 11. At this time, the first inlet hole 111 communicates with the second inlet hole 122 located on the right side of the first sealing part 121. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire. If the shock wave comes from the left, the shock wave receiving sensor 3 connected to the left end of the trigger piston 12 receives the force of the shock wave and pushes the trigger piston 12 to move to the right inside the sleeve 11, causing the first sealing part 121 to move and expose the inlet hole 111 on the sleeve 11. At this time, the inlet hole 111 communicates with the second inlet hole 122 located on the left side of the first sealing part 121. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire.

[0059] The first sealing part 121 has a second liquid passage 52 and a first liquid passage 51 respectively on its left and right sides. The first liquid passage 51 is formed by the space enclosed by the inner wall of the right side of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. The second liquid passage 52 is formed by the space enclosed by the inner wall of the left side of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. Taking the first sealing part 121 and the trigger piston 12 as cylindrical as an example, the diameter of the first sealing part 121 is larger than the diameter of the trigger piston 12, and they fit tightly against the inner wall of the sleeve 11. Thus, the second liquid passage 52 and the first liquid passage 51 are formed on the left and right sides of the first sealing part 121 to facilitate the passage of high-pressure liquid. The provision of the first liquid passage 51 and the second liquid passage 52 increases the docking space between the first inlet hole 111 and the second inlet hole 122, preventing the first inlet hole 111 and the second inlet hole 122 from failing to be directly aligned and connected after the first sealing part 121 and the trigger piston 12 move due to the shock wave, thus preventing the high-pressure liquid from being sprayed out to extinguish the fire.

[0060] A second sealing part 123 is provided on the right side of the trigger piston 12 away from the first sealing part 121. The first liquid passage 51 is formed by the space enclosed by the inner wall of the right side of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the second sealing part 123. Taking the first sealing part 121, the second sealing part 123, and the trigger piston 12 as cylindrical, the diameters of the first sealing part 121 and the second sealing part 123 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the first liquid passage 51. This facilitates the passage of high-pressure liquid and also optimizes the prevention of high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the first liquid passage 51.

[0061] A third sealing part 126 is provided on the left side of the trigger piston 12, away from the first sealing part 121. The second liquid passage 52 is formed by the space enclosed by the left inner wall of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the third sealing part 126. Taking the first sealing part 121, the third sealing part 126, and the trigger piston 12 as cylindrical, the diameters of the first sealing part 121 and the third sealing part 126 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the second liquid passage 52. This facilitates the passage of high-pressure liquid and, more effectively, prevents high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the second liquid passage 52.

[0062] The shock wave receiving and sensing device 3 consists of a shock wave receiver 31 and a push rod 32. The shock wave receiver 31 is mounted on the push rod 32, which has a hollow structure. The trigger piston 12 is connected to the spraying device 4 through the push rod 32. The shock wave is received by the shock wave receiver 31, and under the action of the shock wave, the push rod 32 pushes the trigger piston 12 to move within the sleeve 11. When the first sealing part 121 moves to the left or right, exposing the first inlet hole 111 on the sleeve 11, the first inlet hole 111 and the second inlet hole 122 are connected through the first liquid passage 51 or the second liquid passage 52. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 and the hollow push rod 32, thus extinguishing the fire.

[0063] The high-pressure fire extinguishing liquid stored in the pressure storage device 2 can be high-pressure carbon dioxide liquid, high-pressure liquid nitrogen, or a mixture of high-pressure gas and water, etc.

[0064] Fifth embodiment

[0065] As attached Figure 7 As shown, an automatic explosion-proof device includes a triggering device 1, a pressure-storing liquid storage device 2 containing high-pressure fire extinguishing liquid, a shock wave receiving and sensing device 3, and a spraying device 4. The triggering device 1 includes a sleeve 11 and a triggering piston 12 disposed within the sleeve 11. The sleeve 11 has a first inlet hole 111, and the pressure-storing liquid storage device 2 communicates with the first inlet hole 111. The triggering piston 12 is a hollow structure with a second inlet hole 122 communicating with the hollow structure. The triggering piston 12 has a first sealing part 121 that can block the first inlet hole 111. One end of the triggering piston 12 is connected to the shock wave receiving and sensing device 4. The device 3 is connected, the hollow structure of the trigger piston 12 is connected to the spraying device 4, and the other end of the trigger piston 12 is connected to the shock wave receiving sensor 3. The first sealing part 121 divides the hollow structure of the trigger piston 12 into a left chamber 125 and a right chamber 124. There are two second inlet holes 122 respectively located on the left and right sides of the first sealing part 121, which are connected to the left chamber 125 and the right chamber 124. The left chamber 125 and the right chamber 124 are respectively connected to their respective spraying devices 4. The shock wave receiving sensor 3 is composed of a shock wave receiver 31 and is directly mounted on the trigger piston 12.

[0066] When the shock wave arrives from the right, the shock wave receiver 31 located at the right end of the trigger piston 12 receives the force of the shock wave and pushes the trigger piston 12 to move to the left inside the sleeve 11, causing the first sealing part 121 to move and expose the first inlet hole 111 on the sleeve 11. At this time, the first inlet hole 111 communicates with the second inlet hole 122 located on the right side of the first sealing part 121. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire. If the shock wave comes from the left, the shock wave receiver 31 located at the left end of the trigger piston 12 receives the force of the shock wave and pushes the trigger piston 12 to move to the right inside the sleeve 11, causing the first sealing part 121 to move and expose the inlet hole 111 on the sleeve 11. At this time, the first inlet hole 111 communicates with the second inlet hole 122 located on the left side of the first sealing part 121. The high-pressure liquid in the pressure storage device 2 passes through the first inlet hole 111 and the second inlet hole 122, and is sprayed out from the spraying device 4 through the hollow trigger piston 12 to extinguish the fire.

[0067] The first sealing part 121 has a second liquid passage 52 and a first liquid passage 51 respectively on its left and right sides. The first liquid passage 51 is formed by the space enclosed by the inner wall of the right side of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. The second liquid passage 52 is formed by the space enclosed by the inner wall of the left side of the sleeve 11, the first sealing part 121, and the outer wall of the trigger piston 12. Taking the first sealing part 121 and the trigger piston 12 as cylindrical as an example, the diameter of the first sealing part 121 is larger than the diameter of the trigger piston 12, and they fit tightly against the inner wall of the sleeve 11. Thus, the second liquid passage 52 and the first liquid passage 51 are formed on the left and right sides of the first sealing part 121 to facilitate the passage of high-pressure liquid. The provision of the first liquid passage 51 and the second liquid passage 52 increases the docking space between the first inlet hole 111 and the second inlet hole 122, preventing the first inlet hole 111 and the second inlet hole 122 from failing to be directly aligned and connected after the first sealing part 121 and the trigger piston 12 move due to the shock wave, thus preventing the high-pressure liquid from being sprayed out to extinguish the fire.

[0068] A second sealing part 123 is provided on the right side of the trigger piston 12 away from the first sealing part 121. The first liquid passage 51 is formed by the space enclosed by the inner wall of the right side of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the second sealing part 123. Taking the first sealing part 121, the second sealing part 123, and the trigger piston 12 as cylindrical, the diameters of the first sealing part 121 and the second sealing part 123 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the first liquid passage 51. This facilitates the passage of high-pressure liquid and also optimizes the prevention of high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the first liquid passage 51.

[0069] A third sealing part 126 is provided on the left side of the trigger piston 12, away from the first sealing part 121. The second liquid passage 52 is formed by the space enclosed by the left inner wall of the sleeve 11, the first sealing part 121, the outer wall of the trigger piston 12, and the third sealing part 126. Taking the first sealing part 121, the third sealing part 126, and the trigger piston 12 as cylindrical, the diameters of the first sealing part 121 and the third sealing part 126 are larger than the diameter of the trigger piston 12 and are tightly fitted to the inner wall of the sleeve 11, thereby forming the second liquid passage 52. This facilitates the passage of high-pressure liquid and, more effectively, prevents high-pressure liquid from flowing out from the position where the trigger piston 12 extends out of the sleeve 11 when passing through the second liquid passage 52.

[0070] The high-pressure fire extinguishing liquid stored in the pressure storage device 2 can be high-pressure carbon dioxide liquid, high-pressure liquid nitrogen, or a mixture of high-pressure gas and water, etc.

[0071] Sixth embodiment

[0072] As attached Figure 4As shown, an automatic explosion-proof device, based on a first embodiment, includes at least two pressurized liquid storage devices 2 and at least two spraying devices 4 on each side of the trigger piston. The pressurized liquid storage devices 2 are connected in parallel via T-joints 6, with a check valve 7 and a shut-off valve 8 installed on each parallel connecting pipe. The spraying devices 4 are also connected in parallel via T-joints 6. The parallel design of multiple pressurized liquid storage devices 2 increases the quantity of extinguishing media, correspondingly increasing the extinguishing time. The parallel design of multiple spraying devices increases the extinguishing range. A check valve 7 is installed on the pipeline connecting the pressure storage device 2 and the first inlet port 111 to prevent backflow of high-pressure liquid. A shut-off valve 8 is installed to control the high-pressure liquid in the pressure storage device 2 to be in a state ready to be sprayed or a state prohibited from spraying. For example, closing the shut-off valve 8 during transportation can effectively prevent the trigger piston 12 from moving the first sealing part 121 under bumpy conditions, causing the first inlet port 111 to connect with the second inlet port 122 and resulting in the high-pressure liquid being sprayed out. Or, when pressurizing and filling the pressure storage device 2, it can prevent accidental contact that causes the trigger piston 12 to move the first sealing part 121, causing the first inlet port 111 to connect with the second inlet port 122 and resulting in the high-pressure liquid being sprayed out.

[0073] The second and third embodiments omit structural diagrams in the working state, but the working principle can be referred to the first embodiment.

[0074] The fifth and sixth embodiments omit structural diagrams in the working state, but the working principle can be referred to the fourth embodiment.

[0075] The spraying device 4 and the shock wave receiver 31 are existing technologies.

[0076] The connection between the piston 12 and the sleeve 11 inside the triggering device 1 is sealed with sealing materials such as sealing rings 9 or sealing gaskets, so that no high-pressure liquid will leak out when it is not in operation, and it will not be sprayed out from a position other than the spraying device 4 when it is in operation.

[0077] The pressure storage and liquid storage device 2 can be connected to the first inlet hole 111 via a pipeline.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic explosion-proof device, comprising a triggering device (1), a pressure storage and liquid storage device (2), a shock wave receiving and sensing device (3), and a spraying device (4), characterized in that: The triggering device (1) includes a sleeve (11) and a triggering piston (12) disposed in the sleeve (11). The sleeve (11) is provided with a first inlet hole (111). The pressure storage and liquid storage device (2) is connected to the first inlet hole (111). The triggering piston (12) is a hollow structure and is provided with a second inlet hole (122) connected to the hollow structure. The triggering piston (12) is provided with a first sealing part (121) that can block the first inlet hole (111). One end of the triggering piston (12) is connected to the shock wave receiving and sensing device (3). The hollow structure of the triggering piston (12) is connected to the spraying device (4).

2. The automatic explosion-proof device according to claim 1, characterized in that: The other end of the trigger piston (12) is connected to the shock wave receiving sensor (3). The first sealing part (121) divides the hollow structure of the trigger piston (12) into a left chamber (125) and a right chamber (124). There are two second inlet holes (122) respectively located on the left and right sides of the first sealing part (121) and communicating with the left chamber (125) and the right chamber (124). The left chamber (125) and the right chamber (124) are respectively connected to their respective spraying devices (4).

3. An automatic explosion-proof device according to claim 1, characterized in that: A liquid passage (5) is provided inside the sleeve (11).

4. An automatic explosion-proof device according to claim 3, characterized in that: The liquid passage (5) is formed by the space enclosed by the inner wall of the sleeve (11), the first sealing part (121), and the outer wall of the trigger piston (12).

5. An automatic explosion-proof device according to claim 3, characterized in that: A second sealing part (123) is provided on the right side of the trigger piston (12) away from the first sealing part (121). The liquid passage (5) is composed of the space enclosed by the inner wall of the right side of the sleeve (11), the first sealing part (121), the outer wall of the trigger piston (12), and the second sealing part (123).

6. An automatic explosion-proof device according to claim 2, characterized in that: The first sealing part (121) is provided with a second liquid passage (52) and a first liquid passage (51) on the left and right sides respectively. The first liquid passage (51) is formed by the space enclosed by the inner wall of the right side of the sleeve (11), the first sealing part (121), and the outer wall of the trigger piston (12). The second liquid passage (52) is formed by the space enclosed by the inner wall of the left side of the sleeve (11), the first sealing part (121), and the outer wall of the trigger piston (12).

7. An automatic explosion-proof device according to claim 6, characterized in that: On the trigger piston (12), a third sealing part (126) and a second sealing part (123) are provided on both sides away from the first sealing part (121). The first liquid passage (51) is formed by the space enclosed by the inner wall of the right side of the sleeve (11), the first sealing part (121), the outer wall of the trigger piston (12), and the second sealing part (123). The second liquid passage (52) is formed by the space enclosed by the inner wall of the left side of the sleeve (11), the first sealing part (121), the outer wall of the trigger piston (12), and the third sealing part (126).

8. An automatic explosion-proof device according to any one of claims 1 to 7, characterized in that: The shock wave receiving and sensing device (3) consists of a shock wave receiver (31) and is connected to the trigger piston (12).

9. An automatic explosion-proof device according to any one of claims 1 to 7, characterized in that: The shock wave receiving and sensing device (3) consists of a shock wave receiver (31) and a push rod (32). The shock wave receiver (31) is mounted on the push rod (32). The push rod (32) has a hollow structure. The trigger piston (12) is connected to the spraying device (4) through the push rod (32).

10. An automatic explosion-proof device according to any one of claims 1 to 7, characterized in that: The high-pressure fire extinguishing liquid stored in the pressure storage device (2) is a mixture of high-pressure gas and water, or high-pressure liquid nitrogen or high-pressure carbon dioxide liquid.

11. An automatic explosion-proof device according to any one of claims 1 to 7, characterized in that: There are at least two pressure storage and liquid storage devices (2), and at least two spraying devices (4) on one side of the trigger piston (12) and connected to the hollow structure of the trigger piston (12).

12. An automatic explosion-proof device according to claim 11, characterized in that: The pressure storage and liquid storage device (2) is connected in parallel through a three-way connector (6), and a check valve (7) and a shut-off valve (8) are respectively installed on each parallel connecting pipeline. The spraying device (4) is connected in parallel through a three-way connector (6).

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