Fire extinguishing device and method

Abstract

The present invention belongs to the field of fire protection, and provides a fire extinguishing device and method. The fire extinguishing device includes a foam generating device and an air bag. The foam generating device includes a high-multiplicity foam fire extinguishing agent stock, a foam generating container and a gas generator. The foam generating container has a cavity for containing the high-multiplicity foam fire extinguishing agent stock, a foam outlet and a channel for foam circulation that connects the cavity with the foam outlet. The gas generator has a first air outlet located in the cavity. The air bag is sleeved at the foam outlet, and the interior of the air bag is connected to the foam outlet. The fire extinguishing device provided by the present invention is directly mounted on a drone and is deployed by the drone. It realizes the foaming process of the foam fire extinguishing agent in the air in a simple and fast manner, thereby breaking the current situation that foam fire extinguishing agents cannot be used for forest fires and improving the efficiency of drone fire extinguishing.

Description

Technical Field

[0001] The invention belongs to the field of fire protection, and in particular relates to a fire extinguishing device and method. Background Art

[0002] Forest fire is a natural disaster that is sudden, destructive, and difficult to handle and rescue. Using airplanes or helicopters to extinguish fires is currently an important way to extinguish forest fires. Among them, drone firefighting is widely used because it is not limited by the timing of firefighting, safe and reliable, and easy to operate. However, the load capacity of drones is a huge bottleneck. Drones are just a platform tool, and they mainly use mounted devices for firefighting, such as dry powder, water-based fire extinguishing agents, flame retardants, etc. The load is generally tens of kilograms, and the largest does not exceed 100 kilograms, so the firefighting efficiency is not high. Summary of the invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a fire extinguishing device and method, so as to improve the efficiency of fire extinguishing by drones.

[0004] In order to achieve the above-mentioned objectives, in a first aspect, the present invention provides a fire extinguishing device, comprising a foam generating device and an air bag, wherein the foam generating device comprises a high-multiplicity foam fire extinguishing agent concentrate, a foam generating container and a gas generator, wherein the foam generating container has a cavity for containing the high-multiplicity foam fire extinguishing agent concentrate, a foam outlet and a channel for foam circulation connecting the cavity with the foam outlet, the gas generator has a first air outlet located in the cavity, the air bag is sleeved at the foam outlet, and the interior of the air bag is connected to the foam outlet.

[0005] Furthermore, a foam refining device for refining the foam is arranged in the channel.

[0006] Furthermore, the foam thinning device includes a sponge and a fixing member for fixing the sponge in the channel.

[0007] Furthermore, the gas generator has a second gas outlet located in the channel, and the second gas outlet is arranged between the foam refinement device and the foam outlet.

[0008] Furthermore, a first air outlet ball is provided at the second air outlet, and a plurality of first air outlet holes communicating with the second air outlet are distributed on the surface of the first air outlet ball.

[0009] Furthermore, an air outlet plate is provided at the first air outlet, and a plurality of second air outlet holes communicating with the second air outlet are formed on the air outlet plate.

[0010] Furthermore, the gas generator has a third gas outlet located in the channel, and the third gas outlet is arranged between the foam refinement device and the cavity.

[0011] Furthermore, a second air outlet ball is provided at the third air outlet, and a plurality of third air outlet holes connected with the third air outlet are distributed on the surface of the second air outlet ball.

[0012] Furthermore, the gas generator comprises an igniter, and the igniter is a remote-controlled electronic igniter.

[0013] In a second aspect, the present invention provides a fire extinguishing method, using any one of the above-mentioned fire extinguishing devices, comprising the following steps:

[0014] Drones carry fire-fighting equipment above the fire scene;

[0015] The drone dropped fire-fighting equipment onto the fire below;

[0016] Before the fire extinguishing device is deployed or during its falling process, a gas with a certain pressure is generated in the gas generator, and the gas enters the cavity of the foam generating container, thereby generating foam;

[0017] The foam enters the airbag through the foam outlet together with the gas, and the airbag gradually expands under the action of the gas and foam;

[0018] When the pressure inside the airbag reaches the pressure limit of the airbag, the airbag explodes and the foam produced after the explosion is used to extinguish the fire.

[0019] Beneficial effects of the present invention: The fire extinguishing device and fire extinguishing method provided by the present invention, by being carried on a drone, realize the foaming process of the foam fire extinguishing agent in the air in a simple and fast manner, so that it can be directly used in forest fires where there is no large water source or large compressed foam equipment cannot reach the fire scene, thereby breaking the current situation where foam fire extinguishing agents cannot be used in forest fires and improving the fire extinguishing efficiency of drones. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 A schematic diagram of the structure of a fire extinguishing device provided in one embodiment of the present application;

[0022] Figure 2 A schematic structural diagram of a fire extinguishing device provided in another embodiment of the present application.

[0023] Reference numerals:

[0024] 10-foam generating device, 11-high multiple foam fire extinguishing agent concentrate, 12-foam generating container, 121-cavity, 122-channel, 123-foam outlet, 124-foam circulation hole, 13-gas generator, 131-first air outlet, 132-second air outlet, 133-third air outlet, 14-foam refinement device, 141-fixing part, 142-sponge, 15-first air outlet balloon, 16-second air outlet balloon, 17-air outlet disk, 20-air bag. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] like Figure 1-2 As shown, this embodiment provides a fire extinguishing device, including a foam generating device 10 and an air bag.

[0032] The foam generating device 10 comprises a high-multiplicity foam fire extinguishing agent stock solution 11, a foam generating container 12 and a gas generator 13. The foam generating container 12 has a cavity 121 for containing the high-multiplicity foam fire extinguishing agent stock solution 11, a foam outlet 123 and a channel 122 for foam circulation, which connects the cavity 121 with the foam outlet 123. The gas generator 13 has a first gas outlet 131 located in the cavity 121.

[0033] The high-multiplicity foam fire extinguishing agent concentrate 11 is formed by mixing a high-multiplicity foam fire extinguishing agent and water in a certain proportion. The high-multiplicity foam fire extinguishing agent concentrate 11 is injected into the cavity 121 through the foam outlet 123 or an injection port separately opened on the foam generating container 12. It is preferred that the high-multiplicity foam fire extinguishing agent concentrate 11 is injected into the above-mentioned cavity 121 some time before the fire extinguishing device is put into use, rather than being contained in the cavity 121 all the time, so as to facilitate transportation.

[0034] The gas generator 13 has a gas supply pipe, and a first gas outlet 131 is opened on the gas supply pipe and is located in the above-mentioned cavity 121. The gas generator 13 is installed outside the foam generating container 12, and the part of the gas supply pipe with the first gas outlet 131 extends from the outside of the foam generating container 12 into the foam generating container 12. Preferably, the first gas outlet 131 is located in the high-multiplicity foam fire extinguishing agent stock solution 11 and close to the bottom of the above-mentioned cavity 121, which is conducive to the rapid formation of foam.

[0035] The gas generator 13 is preferably an airbag gas generator 13, also known as an airbag inflator, which includes an igniter. The heat energy generated by the igniter ignites the gas generator to generate a large amount of gas, which breaks through the pressure valve and is released to the outside. The airbag gas generator 13 is a known prior art and will not be described in detail in this application. The igniter is preferably a remote-controlled electronic igniter, and the operator performs the ignition operation by holding a remote control on the ground, thereby conveniently controlling the start time of the gas generator 13. In addition, the igniter can also be controlled by other methods, such as by a controller or a delay circuit.

[0036] In addition to the preferred embodiment, in this embodiment, the gas generator 13 can also be a device including a compressed gas storage tank, which is filled with compressed gas of a certain compression ratio, and a solenoid valve is installed on the discharge pipeline of the compressed gas storage tank, and the solenoid valve is controlled by a controller. After the solenoid valve is opened, the compressed gas storage tank releases pressurized gas into the cavity 121, thereby generating foam. The gas generator 13 can also be a device including a blower installed outside the foam generating container 12, and air with a certain pressure is sent to the foam generating container 12 through the blower.

[0037] The airbag is sleeved at the foam outlet 123, and the interior of the airbag is communicated with the foam outlet 123. The airbag is made of rubber, so that its volume can change when inflated, and thus a certain amount of gas and foam can be contained.

[0038] In one embodiment, a foam refinement device 14 for refining foam is provided in the channel 122. After the high-multiplicity foam fire extinguishing agent stock solution 11 contacts the gas, it will quickly produce coarse foam with a high water content. The coarse foam has a poor fire extinguishing effect and is easy to explode in a fire. Therefore, the coarse foam produced is refined into fine foam by the foam refinement device 14, thereby improving the fire extinguishing effect. Preferably, the foam refinement device 14 includes a sponge 142 and a fixing member 141 for fixing the sponge 142 in the channel 122. The fixing member 141 is preferably a frame structure. The sponge 142 is placed in the frame structure. The fixing member 141 keeps the sponge 142 in the channel 122 at all times and will not be washed away by the gas and foam with a certain pressure. The coarse foam passes through the holes in the sponge 142 to form fine foam. Furthermore, the sponge 142 is preferably a low-density sponge. The holes of the low-density sponge are of appropriate size and have low resistance to the flow of foam.

[0039] In this embodiment, in addition to the preferred implementation, the foam refinement device 14 can also be a metal mesh plate or a ceramic mesh plate with one or more layers of filter mesh structure, or a metal plate or a ceramic plate with a honeycomb hole structure.

[0040] In one embodiment, the gas generator 13 has a second gas outlet 132 located in the channel 122, and the second gas outlet 132 is arranged between the foam refinement device 14 and the foam outlet 123. The second gas outlet 132 can be opened on the same gas supply pipe as the first gas outlet 131, in which case the gas supply pipe passes through the foam refinement device 14, or it can be opened on another gas supply pipe separately, and the other gas supply pipe is also a part of the gas generator 13. The fine foam formed from the foam refinement device 14 has too high a density and is not easy to flow quickly. By supplying gas through the second gas outlet 132, the density of the foam can be reduced, the flow speed of the foam can be increased, and the time for the airbag to expand to a suitable volume can be reduced.

[0041] Preferably, a first outlet ball 15 is provided at the second outlet 132, and a plurality of first outlet holes connected to the second outlet 132 are distributed on the surface of the first outlet ball 15, and the first outlet holes are usually evenly distributed on the surface of the first outlet ball 15. By providing the first outlet ball 15, the second outlet 132 is evenly supplied with air, which is more conducive to reducing the foam density and increasing the flow speed of the foam.

[0042] In one embodiment, an air outlet plate 17 is provided at the first air outlet 131, and a plurality of second air outlet holes connected to the second air outlet 132 are formed on the air outlet plate 17, and the second air outlet holes are evenly distributed on the surface of the air outlet plate 17 or mainly distributed on the lower surface of the air outlet plate 17. Preferably, the air outlet plate 17 is located in the high-multiplicity foam fire extinguishing agent stock solution 11 and is close to the bottom of the cavity 121. As the high-multiplicity foam fire extinguishing agent stock solution 11 is continuously reduced, the disc-shaped structure of the air outlet plate 17 is conducive to prolonging the immersion time of the air outlet plate 17 in the high-multiplicity foam fire extinguishing agent stock solution 11, thereby maintaining the rapid formation state of foam for a long time.

[0043] In one embodiment, the gas generator 13 has a third gas outlet 133 located in the channel 122, and the third gas outlet 133 is arranged between the foam thinning device 14 and the cavity 121. Similar to the previous embodiment, the third gas outlet 133 can be opened on the same gas supply pipe together with the first gas outlet 131 and the second gas outlet 132, or can be opened on a separate gas supply pipe. The foam formed by the gas entering the high-multiplicity foam fire extinguishing agent stock solution 11 is relatively large at the beginning and has a high water content. By adding the third gas outlet 133 before the foam thinning device 14 for gas supply, the large foam column can be turned into small foam, thereby accelerating the flow speed of the foam.

[0044] Preferably, a second outlet ball 16 is provided at the third outlet 133, and a plurality of third outlet holes connected to the third outlet 133 are distributed on the surface of the second outlet ball 16. Usually, the third outlet holes are evenly distributed on the surface of the second outlet ball 16. By providing the second outlet ball 16, the third outlet 133 is evenly supplied with air, which is more conducive to accelerating the flow speed of the foam.

[0045] In the above-mentioned embodiments, Figure 1 As shown in FIG. 1 , as a preferred embodiment, the foam generating device 10 is located below the airbag, that is, the heavier foam generating device 10 faces downward and the lighter airbag faces upward, which is conducive to the downward deployment of the fire extinguishing device. However, in a worse embodiment, such as Figure 2 As shown, the foam generating device 10 can also be located above the airbag, that is, the heavier foam generating device 10 faces upward and the heavier airbag faces downward. In this way, the structure of the foam generating container 12 is different. Specifically, since the airbag is at the bottom, the foam outlet 123 should face downward. By opening a foam circulation hole 124 at the upper part of the cavity 121, the foam formed in the cavity 121 first flows upward and then flows downward through the foam circulation hole 124. The space outside the cavity 121 is the channel 122 for foam circulation, and the foam refinement device 14, the first outlet balloon 15 and the second outlet balloon 16 described in the above embodiments are located in the channel 122.

[0046] The present application also provides a fire extinguishing method, which uses the fire extinguishing device in any of the above embodiments and specifically includes the following steps:

[0047] S1. The drone carries the fire extinguishing device to the top of the fire scene. The fire extinguishing device is mounted on the drone through the carrying device on the drone, and the drone flies to a certain height above the fire scene to be extinguished under the control of the ground control system.

[0048] S2. The drone drops the fire extinguishing device to the fire scene below. The drone drops the fire extinguishing device according to the control signal received.

[0049] S3. Before the fire extinguishing device is deployed or in the process of falling, the gas generator generates gas with a certain pressure, and the gas enters the cavity of the foam generating container, thereby generating foam. That is, in both cases, the gas generator starts to work. In the first case, the fire extinguishing device has started to work some time before being deployed, generating pressurized gas, and then continues to generate pressurized gas after being deployed. In the second case, the fire extinguishing device starts to generate pressurized gas during the process of falling after being deployed.

[0050] S4. The foam enters the airbag through the foam outlet together with the gas. The airbag gradually expands under the action of the gas and foam, and the airbag continues to fall toward the fire scene below.

[0051] S5. When the pressure inside the airbag reaches the pressure limit of the airbag, the airbag explodes, and the foam produced after the explosion is used to extinguish the fire. Specifically, the airbag reaches a suitable height above the fire scene, and under the dual pressure of the high-temperature gas at this height and the inside of the airbag, the airbag explodes, so that during the explosion, the foam in the airbag sprays all around, falls and covers the upper part of the burning object, isolates oxygen and reduces the temperature to play a role in extinguishing the fire. At the same time, the shock wave generated by the explosion of the airbag is also conducive to extinguishing the fire. In this implementation step, the explosion of the airbag can also be actively detonated by a detonating device installed on the airbag, and the detonation method is preferably detonated by remote control.

[0052] Preferably, in step S3, the gas generator starts to produce pressurized gas by remote control.

[0053] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A fire extinguishing device, characterized in that: The invention comprises a foam generating device and an air bag, wherein the foam generating device comprises a high-multiplicity foam fire extinguishing agent stock solution, a foam generating container and a gas generator, wherein the foam generating container has a cavity for containing the high-multiplicity foam fire extinguishing agent stock solution, a foam outlet and a channel for foam circulation connecting the cavity with the foam outlet, the gas generator has a first air outlet located in the cavity, the air bag is sleeved at the foam outlet, and the interior of the air bag is connected to the foam outlet; A foam refining device for refining foam is arranged in the channel; The foam thinning device comprises a sponge and a fixing member for fixing the sponge in the channel; The gas generator has a second gas outlet located in the passage, and the second gas outlet is arranged between the foam attenuating device and the foam outlet.

2. The fire extinguishing device according to claim 1, characterized in that: A first air outlet ball is disposed at the second air outlet, and a plurality of first air outlet holes communicating with the second air outlet are distributed on the surface of the first air outlet ball.

3. The fire extinguishing device according to claim 2, characterized in that: An air outlet plate is arranged at the first air outlet, and a plurality of second air outlet holes communicating with the second air outlet are opened on the air outlet plate.

4. The fire extinguishing device according to claim 3, characterized in that: The gas generator has a third gas outlet located in the channel, and the third gas outlet is arranged between the foam attenuating device and the cavity.

5. The fire extinguishing device according to claim 4, characterized in that: A second air outlet ball is disposed at the third air outlet, and a plurality of third air outlet holes communicating with the third air outlet are distributed on the surface of the second air outlet ball.

6. The fire extinguishing device according to claim 1, characterized in that: The gas generator comprises an igniter, and the igniter is a remote-controlled electronic igniter.

7. A fire extinguishing method, using the fire extinguishing device as described in any one of claims 1 to 6, characterized in that: The following steps are involved: Drones carry fire-fighting equipment above the fire scene; The drone dropped fire-fighting equipment onto the fire below; Before the fire extinguishing device is deployed or during its falling process, a gas with a certain pressure is generated in the gas generator, and the gas enters the cavity of the foam generating container, thereby generating foam; The foam enters the airbag through the foam outlet together with the gas, and the airbag gradually expands under the action of the gas and foam; When the pressure inside the airbag reaches the pressure limit of the airbag, the airbag explodes and the foam produced after the explosion is used to extinguish the fire.

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