Air bag type fire extinguishing device for vehicle

Abstract

The utility model relates to an air bag type fire extinguishing device for a vehicle. The fire extinguishing device comprises an air bottle, an air bag, a container valve and a driving device, the air bag is arranged in the air bottle, a closed cavity is formed by the air bag and the air bottle, and the air bag is used for storing a fire extinguishing agent; the closed cavity is used for being filled with pressure gas; the container valve is arranged on the gas cylinder, and the container valve is used for controlling the fire extinguishing agent to be released from the gas cylinder; the driving device is connected with the container valve and used for controlling opening and / or closing of the container valve. By adopting the fire extinguishing device, the fire extinguishing agent can be stored stably; when fire extinguishing is needed, the fire extinguishing agent in the air bag can be rapidly sprayed out, so that rapid fire extinguishing is achieved; the fire extinguishing device can be overturned and installed at will, all spraying of the fire extinguishing agent is not affected at any angle, and the fire extinguishing device can be flexibly applied to narrow space or specific space.

Description

Technical Field

[0001] The present application relates to the technical field of fire extinguishing devices, and in particular to an airbag fire extinguishing device for a vehicle. Background Art

[0002] In the daily operation of electric buses, due to their special operating environment and working conditions, including frequent uphill and downhill climbs and potential rollovers, rollovers and other severe conditions, vehicle safety has become an important consideration. Especially under these extreme conditions, once a lithium battery thermal runaway event occurs, it will pose a great threat to the safety of the vehicle and passengers. In order to deal with the risk of thermal runaway of lithium batteries, electric buses are usually equipped with special fire extinguishing devices. Among these fire extinguishing devices, the use of siphons as a way to deliver fire extinguishing agents is a common design. However, when dealing with the harsh working conditions mentioned above, the design of the siphon exposes some key limitations.

[0003] The working principle of the existing siphon fire extinguishing device mainly relies on the pressure difference between the liquid's own gravity and the atmospheric pressure to drive the flow of the fire extinguishing agent. When the vehicle is operating normally, the siphon can effectively suck the fire extinguishing agent out from the bottom of the storage container and spray it toward the fire source through the nozzle to achieve an effective fire extinguishing effect. However, when the electric bus faces extreme conditions of rollover or overturning, the posture of the vehicle will change drastically, causing the position and angle of the siphon to change accordingly. In this case, the pressure balance in the siphon is broken, and the flow of the fire extinguishing agent becomes extremely difficult. Specifically, when the vehicle rolls over or overturns, the siphon may be deformed or displaced due to strong impact, or even broken. These changes make it impossible for the siphon to maintain good contact with the bottom of the storage container, resulting in the inability to absorb the fire extinguishing agent at the bottom. At the same time, due to the change in the vehicle's posture, the direction of gravity also changes, which hinders the flow of the fire extinguishing agent in the siphon, further reducing the fire extinguishing efficiency of the siphon. The fire extinguishing agent cannot be completely sprayed out from the siphon, and the thermal runaway of the lithium battery cannot be effectively suppressed, which will cause thermal diffusion of the lithium battery, thereby causing a fire, resulting in loss of life and property. Utility Model Content

[0004] In order to solve the problem that in the prior art siphon fire extinguishing device, the fire extinguishing agent cannot be completely sprayed out from the siphon under severe working conditions, and the thermal runaway of the lithium battery cannot be effectively suppressed.

[0005] The present application provides a vehicle airbag fire extinguishing device, comprising a gas cylinder, an airbag, a container valve and a driving device;

[0006] The airbag is arranged inside the gas cylinder and forms a closed chamber with the gas cylinder. The airbag is used to store the fire extinguishing agent; the closed chamber is used to be filled with pressurized gas;

[0007] The container valve is arranged on the gas cylinder, and the container valve is used to control the release of the fire extinguishing agent from the gas cylinder; the driving device is connected to the container valve, and the driving device is used to control the opening and / or closing of the container valve.

[0008] Furthermore, the airbag is provided with at least one fire extinguishing agent outlet, and the fire extinguishing agent outlet is communicated with the valve port of the container valve.

[0009] Furthermore, it comprises a fire extinguishing agent delivery pipe, and the container valve is connected with the battery box through the fire extinguishing agent delivery pipe.

[0010] Furthermore, a pressure sensor is provided on the container valve, and the pressure sensor is used to monitor the gas pressure in the gas cylinder in real time, and send out an alarm signal when the gas pressure is lower than a set value.

[0011] Furthermore, it also includes a signal controller connected to the driving device, and the signal controller is used to control the driving device to start according to the received fire signal.

[0012] Furthermore, the driving device is an electric explosion driver, an electromagnetic driver, a pneumatic or hydraulic driver.

[0013] Furthermore, the gas cylinder is in the shape of a cylinder, a sphere, a cube or a special shape.

[0014] Furthermore, the material of the gas cylinder is brass, carbon steel, aluminum alloy, stainless steel or copper alloy.

[0015] Furthermore, the airbag is made of synthetic rubber material.

[0016] Furthermore, the pressurized gas is nitrogen, compressed air, argon, carbon dioxide or helium.

[0017] Implementing the embodiments of the utility model has the following beneficial effects:

[0018] The airbag fire extinguishing device of the present application has an airbag filled with a fire extinguishing agent in a gas cylinder, and the fire extinguishing agent in the airbag is pushed out by pressurized gas. The fire extinguishing agent is stored in the airbag and isolated from the external environment, which effectively prevents the fire extinguishing agent from being affected by environmental factors such as temperature and humidity and deteriorating. The flexible material of the airbag can adapt to the volume change of the fire extinguishing agent when the temperature changes, further ensuring the stability of the fire extinguishing agent. The coordinated design of the gas cylinder and the airbag has safety advantages such as explosion-proof and leak-proof, ensuring that no secondary damage to vehicles and personnel will be caused in extreme cases. When fire extinguishing is needed, the drive device can act quickly to open the container valve and push the fire extinguishing agent in the airbag to spray out, so as to achieve rapid fire extinguishing.

[0019] Compared with the traditional siphon fire extinguishing device, the airbag fire extinguishing device of the present application can be flipped and installed 360° at will, and any angle will not affect the full spraying of the fire extinguishing agent, and can be flexibly applied to small spaces or specific spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of an airbag fire extinguishing device for a vehicle according to an embodiment of the utility model.

[0022] Among them, the corresponding reference numerals in the figure are: 1-gas cylinder, 11-sealed chamber, 2-air bag, 3-container valve, 4-driving device, 5-fire extinguishing agent, 7-pressure sensor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be understood that the terms "upper, lower, inside, outside, top, bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, or are for the components themselves in the vertical, perpendicular or gravity direction, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0025] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in this article are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "parts" and "pieces" appearing in this article can represent either a single part or a combination of multiple parts. Terms such as "installation", "setting", "connection" and the like appearing in this article 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 represent that one component is directly attached to another component, or it can represent that one component is attached to another component through an intermediate, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0026] The embodiment of the present application provides a vehicle airbag fire extinguishing device, which can be fixed on the outside of the vehicle's lithium battery box through a fixing frame in actual application, so that when the vehicle's lithium battery thermal runaway occurs, the fire extinguishing agent can be sprayed into the battery box to suppress the thermal runaway of the lithium battery and avoid the thermal diffusion of the lithium battery, which may cause a fire. In the embodiment of the present application, the fire extinguishing agent 5 is a perfluorohexanone fire extinguishing agent. Perfluorohexanone is a colorless, odorless, transparent liquid at room temperature, which is easy to vaporize. It can extinguish fires by suppressing the combustion chain reaction, and can also reduce the temperature of the combustible surface, reduce the oxygen concentration on the combustible surface, and further suppress combustion.

[0027] The following combination Figure 1 An embodiment of the present application provides an airbag-type fire extinguishing device for a vehicle, comprising a gas cylinder 1, an airbag 2, a container valve 3 and a drive device 4; the airbag 2 is arranged inside the gas cylinder 1 and forms a closed chamber 11 with the gas cylinder 1, and the airbag 2 is used to store a fire extinguishing agent 5; the closed chamber 11 is used to be filled with pressurized gas; the container valve 3 is arranged on the gas cylinder 1, and the container valve 3 is used to control the release of the fire extinguishing agent 5 from the gas cylinder 1; the drive device 4 is connected to the container valve 3, and the drive device 4 is used to control the opening and / or closing of the container valve 3.

[0028] Specifically, an airbag 2 is provided inside the gas cylinder 1, and the airbag 2 is filled with a fire extinguishing agent 5. In the closed chamber 11 between the airbag 2 and the gas cylinder 1, a certain pressure of pressure gas is filled, which is used to push the fire extinguishing agent 5 in the airbag 2 to spray out when needed. The container valve 3 is connected to the outlet of the airbag 2, and when the container valve 3 is opened, the fire extinguishing agent 5 can flow out through the container valve 3. The driving device 4 is connected to the container valve 3 and is used to control the opening of the container valve 3 when a fire extinguishing signal is received. The airbag type fire extinguishing device of the present application stores the fire extinguishing agent 5 through the airbag 2, which is isolated from the external environment, effectively preventing the fire extinguishing agent from being affected by environmental factors such as temperature and humidity and deteriorating. At the same time, the flexible material of the airbag 2 can adapt to the volume change of the fire extinguishing agent 5 when the temperature changes, further ensuring the stability of the fire extinguishing agent. The coordinated design of the gas cylinder 1 and the airbag 2 has safety advantages such as explosion-proof and leakage-proof, ensuring that no secondary damage will be caused to vehicles and personnel in extreme cases. When fire extinguishing is required, the driving device 4 can act quickly after receiving the fire extinguishing signal to open the container valve 3. After the container valve 3 is opened, the pressure gas can quickly push the fire extinguishing agent 5 in the airbag 2 to spray out, so as to achieve rapid fire extinguishing. Compared with the traditional siphon fire extinguishing device, the airbag fire extinguishing device can be turned and installed 360 degrees at will, and any angle will not affect the full spraying of the fire extinguishing agent 5, and can be flexibly applied to small spaces or specific spaces.

[0029] Furthermore, at least one fire extinguishing agent outlet is provided on the airbag 2 , and the fire extinguishing agent outlet is communicated with the valve port of the container valve 3 .

[0030] Furthermore, the airbag fire extinguishing device includes a fire extinguishing agent delivery pipe, and the container valve 3 is connected to the battery box through the fire extinguishing agent delivery pipe. When the container valve 3 is opened, the fire extinguishing agent 5 can quickly enter the battery box through the fire extinguishing agent delivery pipe to extinguish the fire, and is directly delivered to the fire source, thereby improving the fire extinguishing efficiency.

[0031] Furthermore, a pressure sensor 7 is provided on the container valve 3. The pressure sensor 7 is used to monitor the gas pressure in the gas cylinder 1 in real time and send an alarm signal when the gas pressure is lower than a set value. In some possible implementations, the pressure sensor 7 may be a pressure switch or a pressure transmitter. The pressure sensor 7 can detect the abnormal pressure of the pressurized gas in the gas cylinder 1 in time to ensure the normal operation of the fire extinguishing device.

[0032] In other embodiments, a temperature sensor and a humidity sensor may be added to comprehensively monitor the working status of the gas cylinder to ensure the normal operation of the fire extinguishing device.

[0033] Furthermore, in some possible implementations, the airbag fire extinguishing device further includes a signal controller connected to the driving device 4, and the signal controller is used to control the driving device 4 to start according to the received fire extinguishing signal, and then open the container valve 3, so that the fire extinguishing agent 5 enters the battery box through the fire extinguishing agent delivery pipe to extinguish the fire. Specifically, the signal controller can directly control the driving device 4 to start and open the container valve 3 according to the fire extinguishing signal such as temperature and smoke fed back by the battery box; in some possible implementations, the signal controller can also be integrated into the central control system of the vehicle to realize linkage with other safety systems.

[0034] Furthermore, the drive device 4 can be an electric explosion drive, an electromagnetic drive, a pneumatic or hydraulic drive device. Specifically, the container valve 3 includes a valve core, and the valve core is connected to the output end of the drive device 4. Exemplarily, when the electric explosion drive is used to open the container valve 3, when the fire extinguishing agent needs to be released, electric energy is applied to the electrode of the electric explosion drive. The electric energy is transmitted to the electric explosive through the electrode, causing the electric explosive to heat up rapidly and explode. The explosion of the electric explosive produces high-temperature and high-pressure gas, which expands rapidly and exerts a huge driving force on the output rod. The output rod moves rapidly under the action of the high-pressure gas, pushing the valve core of the container valve 3, so that it overcomes the spring force or other resistance, thereby opening the valve. When the valve of the container valve 3 is opened, the fire extinguishing agent can flow from the gas cylinder through the fire extinguishing agent delivery pipe, and finally reach the fire source for extinguishing the fire. In other possible implementations, the electromagnetic driver uses the electromagnetic principle to generate power to drive the container valve 3 to open; the pneumatic driver uses compressed gas as a power source to push the container valve 3 to open; the hydraulic driver uses liquid pressure as a power source to drive the container valve 3 to open.

[0035] Further, the shape of the gas cylinder 1 is a cylinder, a sphere, a cube or a special shape. The material of the gas cylinder 1 is brass, carbon steel, aluminum alloy, stainless steel or copper alloy.

[0036] In the embodiment of the present application, the various shape options of the gas cylinder 1 enable the fire extinguishing device to be flexibly installed in the limited space of the vehicle, with greater adaptability. Brass and copper alloys have good corrosion resistance, while carbon steel and stainless steel can provide high strength and durability. Aluminum alloys and certain stainless steel materials can provide lightweight solutions while reducing production costs. The material selection of the gas cylinder must ensure safety in high pressure and high temperature environments. The material of the gas cylinder of the present application ensures its performance under normal use conditions, while ensuring durability under extreme conditions such as high temperature, impact and vibration.

[0037] Furthermore, the airbag 2 is made of a synthetic rubber material. Specifically, the airbag 2 can be made of NBR (nitrile rubber) or EPDM (ethylene-propylene diene-monomethylstyrene rubber) to ensure good elasticity and sealing. In the embodiment of the present application, the airbag 2 can adapt to the volume change of the fire extinguishing agent 5 when the temperature changes, further ensuring the stability of the fire extinguishing agent.

[0038] Further, the pressurized gas is nitrogen, compressed air, argon, carbon dioxide or helium. The pressurized gas is used to provide the necessary pressure in the gas cylinder to ensure the rapid and effective release of the fire extinguishing agent 5. The pressurized gas is not easy to burn or explode, and should have good safety during storage and use in the gas cylinder, be harmless to the environment, and will not cause pollution to the environment even in the event of leakage. It can effectively maintain the pressure in the gas cylinder and remain stable even under long-term storage or extreme temperature conditions.

[0039] The airbag fire extinguishing device of the present application is provided with an airbag filled with a fire extinguishing agent in a gas cylinder, and the fire extinguishing agent in the airbag is pushed out by pressurized gas. The fire extinguishing agent is stored in the airbag and isolated from the external environment, which effectively prevents the fire extinguishing agent from being affected by environmental factors such as temperature and humidity and deteriorating. The flexible material of the airbag can adapt to the volume change of the fire extinguishing agent when the temperature changes, further ensuring the stability of the fire extinguishing agent. The coordinated design of the gas cylinder and the airbag has safety advantages such as explosion-proof and leak-proof, ensuring that no secondary damage to vehicles and personnel will be caused in extreme cases. When fire extinguishing is required, the driving device can act quickly, open the container valve, and push the fire extinguishing agent in the airbag to spray out to achieve rapid fire extinguishing. Compared with the traditional siphon fire extinguishing device, the present airbag fire extinguishing device can be flipped and installed 360° at will, and any angle will not affect the full spraying of the fire extinguishing agent, and can be flexibly applied to small spaces or specific spaces.

[0040] Obviously, the embodiments described above are only embodiments of a part of the embodiments of this specification, rather than all embodiments. Based on the embodiments in the embodiments of this specification, ordinary technicians in this field can make other different forms of changes or modifications without making creative work, which should all fall within the scope of protection of the embodiments of this specification.

[0041] Those skilled in the art will readily come to other implementations of the embodiments of this specification after considering the specification and practicing the utility model disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the embodiments of this specification, which follow the general principles of the embodiments of this specification and include common knowledge or customary technical means in the art that are not disclosed in the embodiments of this specification. The description and embodiments are to be considered merely as exemplary, and the true scope and spirit of the embodiments of this specification are indicated by the following claims.

[0042] It should be understood that the embodiments of the present specification are not limited to the precise structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present specification is limited only by the appended claims.

Claims

1. A vehicle airbag fire extinguishing device, characterized in that: It comprises a gas cylinder (1), an air bag (2), a container valve (3) and a driving device (4); The airbag (2) is arranged inside the gas cylinder (1) and forms a closed chamber (11) with the gas cylinder (1); the airbag (2) is used to store the fire extinguishing agent (5); and the closed chamber (11) is used to be filled with pressurized gas; The container valve (3) is arranged on the gas cylinder (1), and the container valve (3) is used to control the release of the fire extinguishing agent (5) from the gas cylinder (1); the driving device (4) is connected to the container valve (3), and the driving device (4) is used to control the opening and / or closing of the container valve (3).

2. A vehicle airbag fire extinguishing device according to claim 1, characterized in that: The air bag (2) is provided with at least one fire extinguishing agent outlet, and the fire extinguishing agent outlet is communicated with the valve port of the container valve (3).

3. The vehicle airbag fire extinguishing device according to claim 1, characterized in that: It comprises a fire extinguishing agent delivery pipe, and the container valve (3) is connected to the battery box through the fire extinguishing agent delivery pipe.

4. The vehicle airbag fire extinguishing device according to claim 3, characterized in that: The container valve (3) is provided with a pressure sensor (7), and the pressure sensor (7) is used to monitor the gas pressure in the gas cylinder (1) in real time, and to send out an alarm signal when the gas pressure is lower than a set value.

5. The vehicle airbag fire extinguishing device according to claim 3, characterized in that: It also comprises a signal controller connected to the driving device (4), the signal controller being used to control the driving device (4) to start according to a received fire signal.

6. The vehicle airbag fire extinguishing device according to claim 1, characterized in that: The driving device (4) is an electric explosion driver, an electromagnetic driver, a pneumatic or hydraulic driver.

7. The vehicle airbag fire extinguishing device according to claim 1, characterized in that: The gas cylinder (1) is in the shape of a cylinder, a sphere, a cube or a special shape.

8. The vehicle airbag fire extinguishing device according to claim 7, characterized in that: The material of the gas cylinder (1) is brass, carbon steel, aluminum alloy, stainless steel or copper alloy.

9. The vehicle airbag fire extinguishing device according to claim 1, characterized in that: The airbag (2) is made of synthetic rubber material.

10. The vehicle airbag fire extinguishing device according to claim 1, characterized in that: The pressurized gas is nitrogen, compressed air, argon, carbon dioxide or helium.

Images