A soft fire extinguishing bomb for fire scene installation

Abstract

This invention relates to the field of fire extinguishing technology. The technical problems this invention aims to solve are high production costs, high daily labor intensity, and low efficiency. To address these problems, this invention provides a soft fire extinguishing grenade for installation at a fire scene. The invention includes: one end of the fire extinguishing grenade body inserted into a soft storage bag; a first triggering component or a second triggering component respectively used to tear open the soft storage bag to release the extinguishing medium; the first triggering component is used when the extinguishing medium is a liquid extinguishing agent; the second triggering component is used when the extinguishing medium is dry powder or foam; multiple blades are disposed within the fire extinguishing grenade body; a multi-stage piston drive unit introduces gas to drive the blades to swing and cut the soft storage bag; a heating wire ablates the soft storage bag, and gas is introduced into the fire extinguishing grenade body; simultaneously with the rupture of the soft storage bag, the gas in the fire extinguishing grenade body is released into the soft storage bag, applying spraying power to the extinguishing agent. This invention reduces production costs, cumbersome operations, and labor intensity, while achieving high efficiency.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing technology, and in particular to a soft fire extinguishing bomb that is installed at a fire scene. Background Technology

[0002] Mountainous forests, oil storage stations, and substations are located in unique geographical locations with poor transportation access. In the event of a fire, close proximity to the fire site is not an option for firefighters' safety. Therefore, using drones to drop fire extinguishing bombs is the preferred method of firefighting. Fires require three essential elements: oxygen, suitable temperature, and combustible materials. Isolating any one of these elements can extinguish the fire. Lowering the temperature is a cost-effective, relatively simple, and feasible solution.

[0003] Currently, most fire extinguishing bombs on the market use solid, rigid materials (such as metals and non-metals) as their rigid shells. These bombs are pre-filled with a specialized extinguishing agent and carbon dioxide or certain civilian pyrotechnics at the manufacturing plant before leaving the factory. The bombs are then placed in a fixed location in areas requiring firefighting capabilities. In the event of a fire or forest fire, they are transported to the designated location by vehicles and then dropped onto the fire by drones. Due to the harsh conditions at fire scenes, if a single fire extinguishing bomb weighs less than 50 kg, it can be operated manually with a drone, but the extinguishing agent concentration is insufficient, resulting in poor extinguishing effectiveness. If a single bomb weighs more than 50 kg (up to 100 kg), the extinguishing agent concentration increases, but transportation and manual operation become extremely difficult, leading to lower extinguishing efficiency.

[0004] Fire extinguishing bombs are equipped with different extinguishing agents for different types of fires. On the one hand, the procurement cost of extinguishing agents is relatively high. On the other hand, extinguishing agents that contain sensitive materials such as high-pressure carbon dioxide gas and civilian pyrotechnics are subject to restrictions on use, which can cause many inconveniences in storage and transportation, and also increase maintenance costs.

[0005] In summary, currently available fire extinguishing bombs have high production costs, cumbersome usage and daily operations, high labor intensity, high overall fire extinguishing costs, and low fire extinguishing efficiency. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a soft fire extinguishing grenade for installation at a fire scene, comprising: Soft storage bags, and fire extinguishing medium is added into the soft storage bags on site; The fire extinguishing bomb body is inserted into a soft storage bag at one end; A connecting assembly for connecting the fire extinguishing bomb body and the soft storage bag; Either a first triggering component or a second triggering component is used to tear open the soft storage bag to release the extinguishing medium; the first triggering component is used when the extinguishing medium is a liquid extinguishing agent; the second triggering component is used when the extinguishing medium is a dry powder or foam extinguishing agent. The first triggering component includes a multi-stage piston drive unit and multiple blades connected to the multi-stage piston drive unit; the multiple blades are disposed in the fire extinguishing bomb body and are spaced apart circumferentially along the fire extinguishing bomb body; the multi-stage piston drive unit introduces gas to drive the blades to swing outside the fire extinguishing bomb body to cut the soft storage bag; the gas in the fire extinguishing bomb body is released into the soft storage bag, applying pressure to the liquid fire extinguishing agent to disperse the fire extinguishing agent and control the fire extinguishing area.

[0008] The second triggering component includes a heating control unit and a heating wire connected to the heating control unit; the heating wire is arranged along the edge of the soft storage bag, the heating wire ablates the soft storage bag, and gas is introduced into the fire extinguishing bomb body; As the heating wire ablates the soft storage bag or the blade cuts the soft storage bag, the gas in the fire extinguishing bomb is released into the soft storage bag, applying spray pressure to the extinguishing agent to disperse the extinguishing agent and control the extinguishing area.

[0009] In one embodiment of the present invention, the multi-stage piston drive unit includes a base, a linkage piston, an isolation block, a firing piston, and a pressure application assembly. From top to bottom, the base, linkage piston, and isolation block are sequentially and sealed within the outer shell of the fire extinguishing bomb body. A first air chamber is located between the base and the linkage piston, a second air chamber is located between the linkage piston and the isolation block, and a third air chamber is located at the bottom of the isolation block. The blade is disposed in the third air chamber. Along the axial direction, the firing piston is slidably connected to the base. The firing piston is connected to the control box of the fire extinguishing bomb body via the pressure application assembly. Compressed gas is introduced into the first air chamber. Subsequently, the pressure application assembly releases the constraint on the firing piston, and the compressed gas applies an upward reverse thrust to the firing piston, driving the firing piston to slide upward away from the base. The compressed gas is released through the base, reducing its pressure. A pressure difference is formed between the first and second air chambers until the pressure in the second air chamber is greater than the pressure in the first air chamber, pushing the linkage piston towards the first air chamber until the linkage piston disengages from the isolation block, and the gas in the second air chamber enters the third air chamber. The gas in the third air chamber drives the blade to swing.

[0010] In one embodiment of the present invention, the linkage piston includes a piston body and a linkage rod disposed at the bottom of the piston body; a throttling orifice is provided on the isolation block; and the bottom end of the linkage rod cooperates with the throttling orifice.

[0011] In one embodiment of the present invention, the first triggering component further includes a piston bracket and a plurality of support plates; the piston bracket is slidably connected in the outer shell of the fire extinguishing bomb body, and a third air chamber is formed between the piston bracket and the isolation block; the support plates and the blades are arranged in a one-to-one correspondence; one end of the support plate is movably connected to the piston bracket (e.g., hinged), and the other end is movably connected to the middle of the blade (e.g., hinged); one end of the blade is movably connected to the bottom end of the outer shell of the fire extinguishing bomb body (e.g., hinged); the other end of the blade is provided with a cutting edge.

[0012] In one embodiment of the invention, the blade swings in the plane containing the axis of the fire extinguishing bomb body.

[0013] In one embodiment of the present invention, the fire extinguishing bomb body is provided with a plurality of elongated release ports; the release ports are arranged one-to-one with the blades, and the release ports are parallel to the axis of the fire extinguishing bomb body; the blades swing out of the fire extinguishing bomb body through the release ports; the piston support moves down to a predetermined position, and the release port communicates with the third air chamber.

[0014] In one embodiment of the present invention, the pressure application assembly includes a pressure rod, a support, and a pressure release control unit; one end of the pressure rod is movably connected to the base, and the other end is connected to the pressure release control unit; the support is disposed in the middle of the pressure rod and abuts against the top of the firing piston; the pressure release control unit is used to control the firing piston to be constrained in the base or to disengage the firing piston from the base.

[0015] In one embodiment of the present invention, the pressure release control unit includes a base support, a motor, a control circuit, a speed-increasing element, an energy storage element, and a pressure plate; the motor is connected to the base support; the motor is connected to the control circuit; the motor is connected to the speed-increasing element; the energy storage element is connected to the speed-increasing element; the pressure plate is connected to the energy storage element, and the pressure plate has a notch; when the fire extinguishing bomb is in a ready-to-fire state, the pressure plate is connected to the base support, and the pressure plate abuts against the top of the pressure rod; after the fire extinguishing bomb is released, the pressure rod rotates through the notch to control the triggering time of the fire extinguishing bomb, so as to realize the fire extinguishing bomb spraying in the air at a specified height.

[0016] In one embodiment of the present invention, the speed-increasing component includes a meshing first gear and a second gear; the first gear is connected to a motor; the second gear is rotatably connected to a base bracket; the second gear, the energy storage component, and the pressure plate are coaxially connected.

[0017] In one embodiment of the present invention, the pressure release control unit includes an insulating support, a wire, and a heating unit; the insulating support is connected to the base; the other end of the pressure rod is connected to the insulating support via a wire; the wire is connected to the heating unit to control the triggering time of the fire extinguishing bomb, thereby enabling the fire extinguishing bomb to be sprayed in the air at a specified altitude.

[0018] The technical solution of the present invention has the following advantages compared with the prior art: The soft fire extinguishing bomb described in this invention is transported and stored separately from the bomb body, the soft storage bag, and the extinguishing agent. In use, the soft storage bag and the fire extinguishing bomb body are first assembled at the fire scene. The assembled fire extinguishing bomb is then mounted on a drone, and the required extinguishing agent is added to the soft storage bag. This reduces transportation difficulty, transportation costs, and maintenance costs; it also simplifies and reduces the labor intensity of fire extinguishing bomb usage and daily operations.

[0019] The fire extinguishing bomb uses a soft storage bag to simplify the fire extinguishing bomb and reduce the production and use costs of the fire extinguishing bomb product.

[0020] This application is for an emergency fire extinguishing bomb designed for forest fires. In environments with inconvenient transportation, the fire extinguishing bomb can be separated and transported. It uses ordinary water as the extinguishing medium and can be quickly loaded with water nearby at the fire site. It can be quickly mounted on a drone to achieve rapid fire extinguishing.

[0021] For emergency fire extinguishing bombs targeting oil storage stations and substations, they can be directly connected to fire trucks. On-site use of specialized dry powder or foam extinguishing agents is optional. They can be quickly installed and mounted on drones to achieve rapid fire suppression and improve fire extinguishing efficiency. Attached Figure Description

[0022] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a soft fire extinguishing bomb installed at a fire scene according to a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of another embodiment of a soft fire extinguishing bomb installed at a fire scene; Figure 3 yes Figure 1 The diagram shows the structure of the fire extinguishing bomb body and the first triggering component in the soft fire extinguishing bomb installed at the fire scene. Figure 4 yes Figure 1 The diagram shows the structure of the soft storage bag and connecting components in the soft fire extinguishing bomb installed at the fire scene. Figure 5 yes Figure 1 A schematic diagram showing the operation of a soft fire extinguishing bomb installed at a fire scene; Figure 6 yes Figure 1 The diagram shows the operation of the fire extinguishing bomb body and the first triggering component in a soft fire extinguishing bomb installed at a fire scene. Figure 7 yes Figure 1 A schematic diagram showing the operation of the pressure application component in a soft fire extinguishing bomb installed at a fire scene. Figure 8 yes Figure 1 A schematic diagram illustrating the operation of another embodiment of the pressure application component in a soft fire extinguishing grenade installed at a fire scene; Explanation of markings on the accompanying drawings: 100, soft storage bag; 110, feeding port; 200. Fire extinguishing bomb body; 210. Outer casing; 220. Control box; 230. First air chamber; 240. Second air chamber; 250. Third air chamber; 260. Release port; 300. Connecting assembly; 310. Clamping plate; 320. First screw; 330. Second screw; 400. First trigger assembly; 410. Blade; 420. Base; 421. Air nozzle; 422. Through hole; 423. First one-way valve; 430. Linkage piston; 431. Piston body; 432. Linkage rod; 433. Second one-way valve; 440. Isolation block; 441. Throttling port; 450. Firing piston; 460. Pressure application assembly; 461. Pressure rod; 462. Support column; 463. Base bracket; 464. Motor; 465. Control circuit; 466. Speed ​​increaser; 4661. First gear; 4662. Second gear; 467. Energy storage component; 468. Pressure plate; 4681. Notch; 4682. Safety pin; 469. Insulating support; 470. Wire; 471. Heating unit; 480. Piston bracket; 490. Support plate; 500, Second trigger component; 510, Heating control unit; 520, Heating wire. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0024] Reference Figures 1-8 As shown, an embodiment of the present invention provides a soft fire extinguishing grenade for use at a fire scene, comprising: A flexible storage bag 100 is provided for adding extinguishing media on-site. The flexible storage bag 100 is equipped with a filling port 110 for adding extinguishing media on-site. The flexible storage bag 100 can be made of flexible materials such as plastic bags, woven bags, paper bags, or composite materials.

[0025] The fire extinguishing bomb body 200 is inserted into a soft storage bag 100 at one end; the fire extinguishing bomb body 200 includes an outer shell 210 and a control box 220 connected to the top of the outer shell 210. Connecting component 300 is used to connect the fire extinguishing bomb body 200 and the soft storage bag 100; The first triggering component 400 or the second triggering component 500 are both used to tear open the soft storage bag 100 to release the extinguishing medium; the first triggering component 400 is used when the extinguishing medium is a liquid extinguishing agent (e.g., water); the second triggering component 500 is used when the extinguishing medium is a dry powder or foam extinguishing agent. The first triggering component 400 includes a multi-stage piston drive unit and a plurality of blades 410 connected to the multi-stage piston drive unit; the plurality of blades 410 are disposed in the fire extinguishing bomb body 200 and are spaced apart along the circumference of the fire extinguishing bomb body 200; the multi-stage piston drive unit introduces gas to drive the blades 410 to swing outside the fire extinguishing bomb body 200 to cut the soft storage bag 100. The second triggering assembly 500 includes a heating control unit 510 and a heating wire 520 connected to the heating control unit 510; the heating wire 520 is arranged in a circle along the edge of the soft storage bag 100, and the heating wire 520 ablates the soft storage bag 100, allowing gas to be introduced into the fire extinguishing bomb body 200 (in some embodiments, in the second triggering assembly 500, gas can be introduced into the fire extinguishing bomb body 200 through a multi-stage piston drive unit. In other embodiments, in the second triggering assembly 500, gas can also be introduced into the fire extinguishing bomb body 200 through other structures). As the heating wire 520 ablates the soft storage bag 100 or the blade 410 cuts the soft storage bag 100, the gas in the fire extinguishing bomb body 200 is released into the soft storage bag 100 to disperse the fire extinguishing agent and apply pressure to the fire extinguishing agent.

[0026] This application relates to an airborne soft fire extinguishing grenade for on-site loading in fire situations. The grenade body is formed by a soft storage bag 100, and its overall structure is separated from the extinguishing medium. It is suitable for on-site loading of extinguishing agents during fires. The first triggering component 400 or the second triggering component 500 is a separate unit, with its blade 410 folded and stored inside the outer casing 210. For ease of service and handling, the soft storage bag 100 and the fire extinguishing grenade body 200 are independently designed, packaged, and stored; and no extinguishing agent is added during manufacturing and transportation.

[0027] Specifically, the fire extinguishing bomb of this application is packaged separately from the soft storage bag 100 and the fire extinguishing bomb body 200. It does not require pre-filling with extinguishing agents or other energetic media. On-site, the soft storage bag 100 and the fire extinguishing bomb body 200 are assembled, and then the extinguishing agent is added to the soft storage bag 100 on-site. This makes the fire extinguishing bomb lightweight (≤1.5 kg / bomb), easy to transport, and multiple bombs can be carried by a single soldier. It is simple to operate and easy to maintain, offering significant advantages, especially for mountainous forest fire fighting locations with poor transportation. Furthermore, for forest fire fighting, the fire extinguishing bomb uses ordinary water as the extinguishing medium, which, compared to other extinguishing media (commonly dry powder), offers significant advantages in terms of lower extinguishing costs and better extinguishing effect. Secondly, the fire extinguishing bomb has a simple structure and does not contain other sensitive materials, resulting in lower production and daily maintenance costs and a high cost-effectiveness ratio for fire fighting.

[0028] Furthermore, when this fire extinguishing bomb is in operation, the blade 410 cuts and breaks the bag simultaneously, enabling the directional release of high-pressure gas inside the fire extinguishing bomb body 200. The high-pressure gas enters the soft storage bag 100, which can quickly disperse the clumps and accumulations of extinguishing agent, and continuously apply pressure to the extinguishing agent (providing the ejection power for the extinguishing agent), thereby achieving rapid atomization and wide-area spraying of the extinguishing agent, increasing the spray area and diffusion coverage of the extinguishing agent, and enhancing the fire extinguishing, cooling, and smoke suppression effects; it can quickly extinguish the fire point and achieve a highly efficient fire extinguishing function.

[0029] This application uses pneumatically driven liquid extinguishing agent soft storage bag 100 to break the bag, without relying on complex circuitry. It is resistant to high temperatures, electromagnetic interference and high temperature interference in fire scenes, and has strong adaptability to harsh fire scene environments.

[0030] This application specifically targets airborne soft fire extinguishing grenades for use in mountain forest fires, specifically fire extinguishing grenades in a standby state. The soft storage bag 100 and the grenades themselves are packaged and stored separately. During use, they are assembled at the fire scene and filled with ordinary water as the extinguishing agent. The soft storage bag 100 is cracked by the blade 410 of the first triggering component 400. Furthermore, considering the different characteristics of the extinguishing agents used in mountain forest fires and oil storage station / substation fires, while ensuring versatility as much as possible, this application also includes a corresponding design where dry powder or other extinguishing agents are added to the soft storage bag 100 on-site, and then the heating wire 520 of the second triggering component 500 causes the grenades to crack through ablation.

[0031] Airborne soft fire extinguishing bombs used at oil storage stations and substations are in standby status. The soft storage bag (100) and the fire extinguishing bomb body (200) are stored and packaged separately. A key feature is that they are assembled on-site at the fire scene and filled with a special dry powder or foam extinguishing agent. Their external dimensions are consistent with forest fire extinguishing bombs. The soft storage bag (100) is cracked using a pre-embedded heating wire (520) through ablation.

[0032] Furthermore, the multi-stage piston drive unit includes a base 420, a linkage piston 430, an isolation block 440, a firing piston 450, and a pressure application assembly 460; from top to bottom, the base 420, linkage piston 430, and isolation block 440 are sequentially and sealed within the outer shell 210 of the fire extinguishing bomb body 200; the space between the base 420 and the linkage piston 430 is a first air chamber 230, the space between the linkage piston 430 and the isolation block 440 is a second air chamber 240, and the bottom of the isolation block 440 is a third air chamber 250; the blade 410 is disposed in the third air chamber 250; along the axial direction, the firing piston 450 is slidably connected to the base 420; the firing piston 450 is connected to the control box 220 of the fire extinguishing bomb body 200 via the pressure application assembly 460; Compressed gas is introduced into the first chamber 230; then the pressure application assembly 460 releases the constraint on the firing piston 450, and the compressed gas applies an upward reverse thrust to the firing piston 450 to drive the firing piston 450 to slide upward away from the base 420; the compressed gas is released through the base 420 to reduce its pressure; a pressure difference is formed between the first chamber 230 and the second chamber 240 until the pressure in the second chamber 240 is greater than the pressure in the first chamber 230, pushing the linkage piston 430 to move towards the first chamber 230 until the linkage piston 430 disengages from the isolation block 440, and the gas in the second chamber 240 enters the third chamber 250; the gas in the third chamber 250 drives the blade 410 to swing.

[0033] Specifically, this application adopts a multi-stage linkage structure consisting of a first, second, and third air chamber in conjunction with a base 420, a linkage piston 430, an isolation block 440, and a firing piston 450. It relies on air pressure difference to unlock step by step and transmit power in stages, replacing a single drive structure. The action is triggered sequentially and has high fault tolerance. It avoids the problem of component jamming and failure caused by instantaneous high pressure impact, ensuring that the blade 410 extends stably and cuts the soft storage bag accurately, with a high success rate of bag breaking.

[0034] Multiple blades 410 are arranged at intervals along the inner circumference of the fire extinguishing bomb body 200. The multi-stage piston drive unit is integrated inside the outer shell 210 of the fire extinguishing bomb body 200. The overall structure is compact and does not occupy additional installation space. The circumferentially arranged blades 410 can cut the soft storage bag 100 at multiple points, resulting in a larger opening and smoother and faster release of the fire extinguishing agent.

[0035] This application achieves controllable triggering of the bag-breaking action by constraining the pressure application component 460 and unlocking the firing piston 450, thus avoiding accidental activation of the device.

[0036] Furthermore, the linkage piston 430 includes a piston body 431 and a linkage rod 432 disposed at the bottom of the piston body 431; the isolation block 440 is provided with a throttle port 441; the bottom end of the linkage rod 432 cooperates with the throttle port 441.

[0037] In some possible embodiments, the base 420 is provided with a nozzle 421 that communicates with the first air chamber 230. Compressed gas (e.g., compressed air) can be injected into the first air chamber 230 from the nozzle 421.

[0038] In some possible embodiments, the base 420 is provided with a through hole 422, and the firing piston 450 is slidably connected in the through hole 422, thereby realizing the sliding connection between the firing piston 450 and the base 420. In addition, when the firing piston 450 is disengaged from the base 420, the compressed gas in the first gas chamber 230 can be released through the through hole 422.

[0039] In some possible embodiments, the throttle orifice 441 includes a large-diameter section and a small-diameter section that are interconnected. The bottom end of the linkage rod 432 engages with the large-diameter section, and the diameter of the small-diameter section is smaller than that of the large-diameter section. In this way, it is possible to prevent the linkage rod 432 from passing through the isolation block 440 and entering the third gas chamber 250 under abnormal circumstances, while also enabling gas in the second gas chamber 240 to enter the third gas chamber 250.

[0040] When the product leaves the factory, the linkage rod 432 is located in the throttle port 441. When the pressure in the second air chamber 240 is greater than the pressure in the first air chamber 230, the linkage piston 430 is pushed to move towards the first air chamber 230. Then the linkage rod 432 disengages from the isolation block 440, and the gas in the second air chamber 240 enters the third air chamber 250.

[0041] In some embodiments, the base 420, piston body 431, isolation block 440 and piston support 480 are respectively sealed to the inner wall of the outer casing 210 by sealing rings.

[0042] In some embodiments, the first triggering component 400 further includes a first one-way valve 423 and a second one-way valve 433; the first one-way valve 423 is connected to the bottom of the base 420; the second one-way valve 433 is connected to the bottom of the linkage piston 430. The first one-way valve 423 and the second one-way valve 433 prevent compressed air in the first air chamber 230 from flowing backward and leaking through the air nozzle 421.

[0043] Furthermore, the first triggering assembly 400 also includes a piston support 480 and a plurality of support plates 490; the piston support 480 is slidably connected in the outer shell 210 of the fire extinguishing bomb body 200, and a third air chamber 250 is formed between the piston support 480 and the isolation block 440; the support plates 490 and the blades 410 are arranged in a one-to-one correspondence; one end of the support plate 490 is movably connected to the piston support 480 (e.g., hinged), and the other end is movably connected to the middle part of the blade 410 (e.g., hinged); one end of the blade 410 is movably connected to the bottom end of the outer shell 210 of the fire extinguishing bomb body 200 (e.g., hinged); the other end of the blade 410 is provided with a blade edge.

[0044] In some possible implementations, there are six blades 410 and six support plates 490.

[0045] Specifically, the gas entering the third gas chamber 250 pushes the piston support 480 downward, and under the action of the support plate 490, drives the blade 410 to swing beyond the fire extinguishing bomb body 200 until the blade 410 cuts the soft storage bag 100. This application drives the blade 410 to swing by the movement of the piston support 480, which is structurally stable and reliable, ensuring cutting force.

[0046] In some comparative embodiments, the soft storage bag 100 is cut laterally, thereby cutting the bottom of the soft storage bag 100 in half, so that the extinguishing agent in the soft storage bag 100 is released downwards under its own weight. This results in a smaller extinguishing area and reduced extinguishing effectiveness.

[0047] Furthermore, in order to solve the above problems, the blade 410 of this embodiment swings in the plane containing the axis of the fire extinguishing bomb body 200.

[0048] Specifically, in this embodiment, when the blade 410 cuts the soft storage bag 100, it can form multiple longitudinal (elongated) ruptures on the soft storage bag 100, thereby creating a spraying state when the extinguishing agent is released from the soft storage bag 100, thus increasing the extinguishing area.

[0049] Furthermore, the fire extinguishing bomb body 200 is provided with multiple elongated release ports 260; each release port 260 is corresponding to a blade 410, and the release port 260 is parallel to the axis of the fire extinguishing bomb body 200; the blade 410 swings out of the fire extinguishing bomb body 200 through the release port 260; the piston support 480 descends to a predetermined position, and the release port 260 communicates with the third gas chamber 250.

[0050] Specifically, in this embodiment, the release port 260 facilitates the blade 410's swing through the bag, and allows pressurized gas in the third gas chamber 250 to be ejected outwards from the release port 260 when or after the soft storage bag 100 is cut. In other words, as the soft storage bag 100 is cut, water or other liquid extinguishing agent flows outwards, while the residual pressure of the gas in the third gas chamber 250 further propels the water or other liquid extinguishing agent to spray outwards, creating a pattern similar to natural rainfall. This increases the coverage area of ​​the water or other liquid extinguishing agent, reduces the combustion temperature of the space around the fire, and quickly extinguishes the fire, achieving a highly efficient fire extinguishing function. Furthermore, the release port 260 in this application is located at the same position as the blade 410 cutting the soft storage bag 100, further enhancing the effect of propelling the water or other liquid extinguishing agent to spray outwards.

[0051] Furthermore, the pressure application assembly 460 includes a pressure rod 461, a support column 462, and a pressure release control unit; one end of the pressure rod 461 is movably connected to the base 420 (for example, one end of the pressure rod 461 is hinged to the base 420 via a pin), and the other end is connected to the pressure release control unit; the support column 462 is located in the middle of the pressure rod 461 and abuts against the top of the firing piston 450; the pressure release control unit is used to control whether the firing piston 450 is constrained in the base 420 or disengaged from the base 420.

[0052] Furthermore, the pressure release control unit includes a base bracket 463, a motor 464, a control circuit 465, a speed-increasing element 466, an energy storage element 467, and a pressure plate 468. The motor 464 is connected to the base bracket 463; the motor 464 is connected to the control circuit 465; the motor 464 is connected to the speed-increasing element 466; the energy storage element 467 is connected to the speed-increasing element 466; the pressure plate 468 is connected to the energy storage element 467, and the pressure plate 468 has a notch 4681. When the fire extinguishing bomb is in a ready-to-fire state, the pressure plate 468 is connected to the base bracket 463, and the pressure plate 468 abuts against the top of the pressure rod 461. After the fire extinguishing bomb is released, the pressure rod 461 rotates through the notch 4681. In some embodiments, the pressure plate 468 is fixedly connected to the base bracket 463 by a safety pin 4682. The safety pin 4682 is connected to the drone by a rope; after the bomb is released, the safety pin 4682 is removed under the action of the fire extinguishing bomb's gravity. This serves as the start timer for the fire extinguishing bomb's delay, ensuring the bomb's aerial spraying altitude.

[0053] In some possible implementations, the energy storage element 467 is an elastic circular spring. The outer end of the spring is fixed to the base support 463, and the inner end of the spring is rotatably connected to the base support 463, storing energy by pre-rotating and compressing it under external force.

[0054] Specifically, in the fire extinguishing bomb ready-to-fire state, with the safety pin 4682 locked, the pressure plate 468 is relatively fixed to the base bracket 463, and the end face of the pressure plate 468 contacts the pressure rod 461, thereby stopping the pressure rod 461. After the drone drops the bomb, the safety pin 4682 is removed, the energy storage component 467 releases the stored energy, thereby driving the pressure plate 468 and the speed-increasing component 466 to rotate, causing the motor 464 to rotate at high speed. Motor 464 converts mechanical energy into electrical energy output voltage. Control circuit 465 operates based on the output voltage of motor 464, constantly releasing voltage energy to generate an electromagnetic damping load on motor 464, controlling the rotation speed of pressure plate 468. This allows pressure plate 468 to rotate at a controllable speed. When the notch 4681 of pressure plate 468 aligns with pressure rod 461, pressure rod 461 loses its restraining force and rotates along the pin shaft, creating space for movement. This allows firing piston 450 to lose its restraining force and move outward under the thrust of compressed air until firing piston 450 detaches from base 420. In this embodiment, control circuit 465 can adjust the energy release power, further control the rotation speed of pressure plate 468, and precisely control the alignment time of notch 4681 of pressure plate 468 with pressure rod 461, achieving precise control of the fire extinguishing bomb's spray at a predetermined altitude in the air, thereby achieving efficient, high-quality, and precise fire extinguishing.

[0055] Furthermore, the speed-increasing component 466 includes a meshing first gear 4661 and a second gear 4662; the first gear 4661 is connected to the motor 464; the second gear 4662 is rotatably connected to the base bracket 463; the second gear 4662, the energy storage component 467, and the pressure plate 468 are coaxially connected. In some embodiments, the second gear 4662, the inner end of the spring, and the pressure plate 468 are rotatably connected to the base bracket 463 via a main shaft.

[0056] Specifically, the first gear 4661 and the second gear 4662 mesh to form a gear speed-increasing mechanism.

[0057] In some possible embodiments, the connecting assembly 300 includes two clamping plates 310 and a plurality of first screws 320; the two clamping plates 310 are symmetrically clamped on the top of the soft storage bag 100 and connected by the plurality of first screws 320; the clamping plates 310 are connected to the fire extinguishing bomb body 200. In some possible embodiments, after a portion of the fire extinguishing bomb body 200 is inserted into the soft storage bag 100, the two clamping plates 310 connect and fix the soft storage bag 100 and the fire extinguishing bomb body 200 circumferentially. The top end of the clamping plate 310 is connected to the control box 220 by a second screw 330, thereby connecting and fixing the soft storage bag 100 and the fire extinguishing bomb body 200 axially.

[0058] Specifically, in this embodiment, the soft storage bag 100 and the fire extinguishing bomb body 200 are connected and fixed in the circumferential and axial directions, making the connection between the two more stable and reliable.

[0059] Furthermore, the pressure release control unit includes an insulating support 469, a wire 470 (e.g., nylon thread), and a heating unit 471; the insulating support 469 is connected to the base 420; the other end of the pressure rod 461 is connected to the insulating support 469 via the wire 470; the wire 470 is connected to the heating unit 471.

[0060] Specifically, in this embodiment, the heating unit 471 is energized and heats up, instantly burning out the wire 470. One end of the pressure rod 461 loses its constraint and rotates, causing the firing piston 450 to lose control. The firing piston 450 moves upward under the thrust of compressed air, simultaneously pushing the pressure rod 461 to rotate along the pin shaft to create space for movement, and the firing piston 450 disengages from the base 420. This embodiment rapidly triggers the firing piston 450 to disengage from the base 420 by instantly breaking the wire 470, and through a delay setting, the time when the firing piston 450 disengages from the base 420 can be accurately controlled.

[0061] The fire extinguishing method described in this application is as follows: 1. When the extinguishing medium is a liquid extinguishing agent When a forest fire occurs and the fire extinguishing bomb needs to be activated, the soft storage bag 100 is fastened to the clamping plate 310 by the first screw 320, and then the fire extinguishing bomb body 200 and the soft storage bag 100 are connected to form a complete fire extinguishing bomb assembly by the second screw 330, which is then mounted on a drone. Fire extinguishing agent is added to the soft storage bag 100 mounted on the drone through the feeding port 110, enabling the fire extinguishing bomb of this application to have fire extinguishing function. Compressed air is injected into the first triggering assembly 400 through the air nozzle 421 using an electric air pump or a manual air pump. The compressed air flows into the first air chamber 230 and builds up a pressure of 1 MPa after being restricted by the first one-way valve 423 and the second one-way valve 433. The compressed air inside the first air chamber 230 applies a reverse thrust (upward) to the firing piston 450. Initially, the control force applied to the firing piston 450 by the pressure application component 460 is balanced with the aforementioned reverse thrust. At this time, the firing piston 450 is in a stationary, ready-to-fire state, and the firing piston 450 is sealed to the through hole 422 by a sealing ring, thereby preventing compressed air from leaking from the firing piston 450.

[0062] The drone takes off and, after reaching its flight altitude, releases the bomb. After the drone releases the bomb, an internal timer begins. When the fire extinguishing bomb freely falls to a predetermined altitude above the target point, the pressure application component 460 releases its constraint control over the firing piston 450 (the drone's flight altitude is determined based on the fire situation, and the aerial spraying altitude of the fire extinguishing bomb is preset before controlling the pressure application component 460 to operate). After losing control, the firing piston 450 moves upward under the action of a reverse thrust until it detaches from the base 420. At this point, the through hole 422 connects the first air chamber 230 to the outside. The compressed air in the first chamber 230 is released through the through hole 422, reducing its pressure. The second chamber 240 is isolated from the first chamber 230 by the first one-way valve 423, preventing compressed air from flowing from the second chamber 240 to the first chamber 230. A pressure difference is formed between the second chamber 240 and the first chamber 230, with the pressure in the second chamber 240 being greater than that in the first chamber 230. This pushes the linkage piston 430 towards the first chamber 230 until the throttle port 441 is opened. Thus, the compressed air stored in the second chamber 240 flows to the third chamber 250 through the throttle port 441, simultaneously pushing the piston support 480 downward. The piston support 480 is linked with the support plate 490 and the blade 410. The blade 410 rotates around the axis, and multiple blades 410 simultaneously rotate and spread outward by approximately 100°, thereby longitudinally cutting multiple positions of the soft storage bag 100. As the piston support 480 moves downward to cut the soft storage bag 100, or when cutting a portion of it, the release port 260 connects the third air chamber 250 with the soft storage bag 100. This allows the compressed air in the third air chamber 250 to spray the extinguishing agent in the soft storage bag 100, causing the extinguishing agent in the soft storage bag 100 to spray outward and spread, increasing the spray area of ​​the extinguishing medium.

[0063] 2. When the extinguishing agent is dry powder or foam extinguishing agent When the extinguishing agent is dry powder or foam, the soft storage bag 100 with the pre-embedded heating wire 520 is assembled on-site with the fire extinguishing bomb body 200 using the above-mentioned method. Compressed air (≤1MPa) is added to the first air chamber 230 using an electric air pump or a manual air pump, the delay time is set, and the power supply to the heating control unit 510 is turned on. Then, the device is mounted on the bomb rack of the UAV, and the fire extinguishing bomb mounted on the bomb rack is filled with special dry powder or foam extinguishing agent through the feeding port 110, completing the preparation work before bombing. The drone takes off and cruises to a certain altitude to drop bombs. The heating control unit 510 supplies power to the heating wire 520 after a specified delay, which ablates the soft storage bag 100 and causes it to rupture. At this time, under the coordinated action of the linkage piston 430, the isolation block 440, the firing piston 450, and the piston support 480 (the linkage of the linkage piston 430, the isolation block 440, the firing piston 450, and the piston support 480 is the same as described above), the compressed air inside the second air chamber 240 is ejected from the throttle port 441 into the third air chamber 250. The high-speed airflow then sprays the extinguishing agent inside the soft storage bag 100, causing the dry powder or foam extinguishing agent of the fire extinguishing bomb to be sprayed at a certain altitude in the air, increasing the spray area and the extinguishing area.

[0064] The soft storage bag 100 and the fire extinguishing bomb body 200 of this application are manufactured separately and transported independently. There is no need to pre-fill the fire extinguishing agent during the storage and transportation stage, which avoids the risks of fire extinguishing agent leakage, agent deterioration, accidental triggering of high-pressure components, and the risk of explosion / damage to the finished product during storage and transportation. It reduces safety hazards in the production, storage and transfer process and is suitable for long-distance and complex environment transportation (especially forest fires).

[0065] The equipment can be assembled and filled with extinguishing agents at the fire scene. It can flexibly select the corresponding type and dosage of extinguishing agent according to the type of fire (solid fire, liquid fire, special fire situation), without the need for fixed pre-filled agents, adapting to the fire extinguishing needs of multiple scenarios, and has a high degree of equipment versatility.

[0066] This application involves storage and transportation without any agent load, and the core driving components of the device are kept in a dry, non-corrosive environment for a long time. This reduces the corrosion and wear of precision components such as pistons, blades 410, and gas chambers by extinguishing agents, extends the service life of the device, and reduces the cost of daily inspection, maintenance, and replacement.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A soft fire extinguishing grenade for use at a fire scene, characterized in that: include: A soft storage bag is used to add fire extinguishing medium to the soft storage bag on site. One end of the fire extinguishing bomb is inserted into the soft storage bag; A connecting component for connecting the fire extinguishing bomb body and the soft storage bag; Either a first triggering component or a second triggering component is used to tear open the soft storage bag to release the extinguishing medium; when the extinguishing medium is a liquid extinguishing agent, the first triggering component is used; when the extinguishing medium is a dry powder or foam extinguishing agent, the second triggering component is used. The first triggering component includes a multi-stage piston drive unit and a plurality of blades connected to the multi-stage piston drive unit; the plurality of blades are disposed in the fire extinguishing bomb body and are spaced apart along the circumference of the fire extinguishing bomb body; the multi-stage piston drive unit is supplied with gas to drive the blades to swing outside the fire extinguishing bomb body to cut the soft storage bag; The second triggering component includes a heating control unit and a heating wire connected to the heating control unit; the heating wire is arranged along the edge of the soft storage bag, the heating wire ablates and cuts the soft storage bag, and gas is introduced into the fire extinguishing bomb body; As the heating wire ablates the soft storage bag or the blade cuts the soft storage bag, the gas in the fire extinguishing bomb body is released into the soft storage bag to disperse the fire extinguishing agent and apply spray pressure to the fire extinguishing agent.

2. The soft fire extinguishing grenade installed at a fire scene according to claim 1, characterized in that: The multi-stage piston drive unit includes a base, a linkage piston, an isolation block, a firing piston, and a pressure application assembly. From top to bottom, the base, the linkage piston, and the isolation block are sequentially and sealed within the outer shell of the fire extinguishing bomb body. A first air chamber is located between the base and the linkage piston, a second air chamber is located between the linkage piston and the isolation block, and a third air chamber is located at the bottom of the isolation block. The blade is disposed in the third air chamber. Along the axial direction, the firing piston is slidably connected to the base. The firing piston is connected to the fire extinguishing bomb body via the pressure application assembly. Compressed gas is introduced into the first air chamber; then the pressure application component releases the constraint on the firing piston, and the compressed gas drives the firing piston to slide upward away from the base; the compressed gas is released to reduce its pressure; until the pressure in the second air chamber is greater than the pressure in the first air chamber, the linkage piston is pushed to move towards the first air chamber until the linkage piston disengages from the isolation block, and the gas in the second air chamber enters the third air chamber; the gas in the third air chamber drives the blade to swing.

3. The soft fire extinguishing grenade installed at a fire scene according to claim 2, characterized in that: The linkage piston includes a piston body and a linkage rod disposed at the bottom of the piston body; the isolation block is provided with a throttling orifice; the bottom end of the linkage rod cooperates with the throttling orifice.

4. The soft fire extinguishing grenade installed at a fire scene according to any one of claims 2 to 3, characterized in that: The first triggering component also includes a piston bracket and multiple support plates; the piston bracket is slidably connected in the fire extinguishing bomb body, and a third air chamber is formed between the piston bracket and the isolation block; the support plates are arranged in a one-to-one correspondence with the blades; one end of the support plate is movably connected to the piston bracket, and the other end is movably connected to the middle of the blade; one end of the blade is movably connected to the fire extinguishing bomb body; the other end of the blade is provided with a cutting edge.

5. The soft fire extinguishing grenade installed at a fire scene according to claim 4, characterized in that: The blade swings in the plane containing the axis of the fire extinguishing bomb body.

6. The soft fire extinguishing grenade installed at a fire scene according to claim 5, characterized in that: The fire extinguishing bomb body is provided with multiple elongated release ports; each release port is arranged in a corresponding manner to the blade, and the release port is parallel to the axis of the fire extinguishing bomb body; the blade swings out of the fire extinguishing bomb body through the release port; the piston support moves down to a predetermined position, and the release port communicates with the third air chamber.

7. The soft fire extinguishing grenade installed at a fire scene according to claim 2, characterized in that: The pressure application assembly includes a pressure rod, a support, and a pressure release control unit; one end of the pressure rod is movably connected to the base, and the other end is connected to the pressure release control unit; the support is located in the middle of the pressure rod and abuts against the top of the firing piston; the pressure release control unit is used to control the firing piston to be constrained in the base or to disengage from the base.

8. The soft fire extinguishing grenade installed at a fire scene according to claim 7, characterized in that: The pressure relief control unit includes a base bracket, a motor, a control circuit, a speed-increasing element, an energy storage element, and a pressure plate; the motor is connected to the base bracket; the motor is connected to the control circuit; the motor is connected to the speed-increasing element; the energy storage element is connected to the speed-increasing element; the pressure plate is connected to the energy storage element, and the pressure plate has a notch; when the fire extinguishing bomb is in a ready-to-fire state, the pressure plate is connected to the base bracket, and the pressure plate abuts against the top of the pressure rod; after the fire extinguishing bomb is released, the pressure rod rotates through the notch.

9. The soft fire extinguishing grenade installed at a fire scene according to claim 8, characterized in that: The speed-increasing component includes a meshing first gear and a second gear; the first gear is connected to the motor; the second gear is rotatably connected to the base bracket; the second gear, the energy storage component, and the pressure plate are coaxially connected.

10. The soft fire extinguishing grenade installed at a fire scene according to claim 7, characterized in that: The pressure release control unit includes an insulating support, a wire, and a heating element; the insulating support is connected to the base; the other end of the pressure rod is connected to the insulating support via the wire; and the wire is connected to the heating element.

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