A dry powder fire extinguishing device placed in the engine compartment of a vehicle

Abstract

The utility model discloses a dry powder fire extinguishing device placed in the automobile engine compartment relates to fire extinguishing device technical field, including the metal casing of jar shape, the top of metal casing is sealed and is installed the top cover, and the center of top cover is provided with the protective housing of downward extension, the lower part of the inside space of protective housing is provided with the gas production structure, and the upper part is provided with the fire transmission subassembly, and the top of protective housing is installed the electricity reception subassembly for receiving outside starting signal, the inside cavity of metal casing is filled with superfine dry powder fire extinguishing agent, and the bottom edge of metal casing is provided with the nozzle. The utility model discloses through with fire extinguishing agent, gas production structure and electric control starting device integration in metal casing, and ingeniously arrange in the engine compartment, realized the automatic monitoring and instantaneous response to the cabin fire. When receiving the fire signal, the device can start instantaneously, without manual intervention, effectively overcome the traditional hand-held fire extinguisher opening cabin cover difficult, the malpractice of operation delay.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing devices, and in particular to a dry powder fire extinguishing device placed in the engine compartment of an automobile. Background Technology

[0002] The engine compartment is filled with wires, oil lines, and components that operate at high temperatures for extended periods. The working environment is complex and presents various safety hazards, such as oil leaks, aging wiring, or short circuits. These factors can easily cause fires and pose a serious threat to the lives and property of drivers and passengers.

[0003] Traditional car fire extinguishers are mostly handheld fire extinguishers. However, these traditional extinguishers are inadequate when faced with fires that spontaneously combust in the engine compartment. Fires in the engine compartment spread extremely rapidly, quickly developing into large blazes. Furthermore, due to safety concerns and the possibility of the hood being deformed, it is difficult to open the hood for firefighting operations. This makes it challenging to effectively control and extinguish fires in the engine compartment using handheld fire extinguishers. Utility Model Content

[0004] The purpose of this invention is to address the limitations of traditional fire-fighting equipment in the existing technology by proposing a dry powder fire extinguishing device that can be placed in the engine compartment of a car.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A dry powder fire extinguishing device for placement in an automobile engine compartment includes a canister-shaped metal casing with a top cover sealed to the top. A protective shell extending downwards is located at the center of the top cover. A gas-generating structure is located in the lower part of the internal space of the protective shell, and a flaming assembly is located in the upper part. An electrical connection component for receiving external activation signals is installed at the top of the protective shell. The internal cavity of the metal casing is filled with ultrafine dry powder fire extinguishing agent, and a nozzle is located at the bottom edge of the metal casing. The electrical connection component, the flaming assembly, and the gas-generating structure are sequentially connected, enabling the high-pressure gas generated by the gas-generating structure to drive the ultrafine dry powder fire extinguishing agent to be ejected from the nozzle.

[0006] Preferably, the outer wall of the nozzle is threaded with an annular sealing cap, and a safety diaphragm is installed inside the sealing cap to block the nozzle.

[0007] Preferably, the gas-generating structure includes a gas-generating propellant column filled in the middle of the inner cavity of the protective shell and a cavity pipe filled in the bottom of the inner cavity of the protective shell.

[0008] Preferably, the protective shell has connecting grooves on both sides of its bottom, and sealing paper is installed in the connecting grooves. The inner side of the sealing paper is in contact with the gas-generating propellant column and the cavity pipe.

[0009] Preferably, the ignition assembly includes a sealing plug fitted at the end of the protective shell and a metal tube fixedly installed in the inner cavity of the protective shell. A ignition-transferring propellant is disposed in the inner cavity of the protective shell between the metal tube and the sealing plug. A piece of cotton paper is installed at the upper opening of the metal tube. A jet-shaped output end is provided at the lower end of the metal tube. A baffle is provided on the inner edge of the output end to prevent the ignition-transferring propellant from falling off.

[0010] Preferably, the power connection assembly includes a power connection port fixedly installed on the top of the protective shell, and the ignition head at the lower end of the power connection port is located inside the ignition column.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by integrating the extinguishing agent, gas-generating structure, and electronically controlled starting device into a metal casing and cleverly arranging it in the engine compartment, automatic monitoring and instantaneous response to fires within the compartment are achieved. Upon receiving a fire signal, the device can activate instantly without manual intervention, effectively overcoming the drawbacks of traditional portable fire extinguishers, such as difficulty in opening the hatch and operational delays. Its built-in gas-generating structure can rapidly generate powerful pressure, driving the ultra-fine dry powder extinguishing agent to precisely and efficiently cover the combustion source from the bottom nozzle, thereby achieving rapid suppression and extinguishing in the early stages of a fire. This greatly improves fire extinguishing efficiency and reliability, providing strong protection for vehicle safety. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the gas-generating structure of this utility model; Figure 3 This is a schematic diagram of the fire-transfer assembly structure of this utility model.

[0013] The numbers in the diagram represent: 1. Ultrafine dry powder extinguishing agent; 2. Metal casing; 3. Gas generation structure; 4. Flame transfer assembly; 5. Electrical connection assembly; 6. Protective casing; 7. Top cover; 8. Nozzle; 9. Safety diaphragm; 10. Sealing cover. 33. Gas-producing propellant column; 34. Hollow cavity pipe; 35. Connecting groove; 36. Sealing paper; 41. Power connection port; 42. Sealing plug; 43. Flame-transmitting charge; 44. Metal tube; 45. Output end; 46. Baffle; 47. Cotton paper. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0017] Example: This example provides a dry powder fire extinguishing device placed in the engine compartment of a car. See [link to example]. Figure 1-3 Specifically, it includes a canister-shaped metal shell 2, with a top cover 7 sealed on the top of the metal shell 2, and a protective shell 6 extending downward from the center of the top cover 7; a gas generating structure 3 is provided in the lower part of the internal space of the protective shell 6, a fire transmission component 4 is provided in the upper part, and an electrical connection component 5 for receiving external activation signals is installed at the top of the protective shell 6; the internal cavity of the metal shell 2 is filled with ultrafine dry powder extinguishing agent 1, and a nozzle 8 is provided at the bottom edge of the metal shell 2; the electrical connection component 5, the fire transmission component 4, and the gas generating structure 3 work in sequence and are connected, so that the high-pressure gas generated by the gas generating structure 3 can drive the ultrafine dry powder extinguishing agent 1 to be sprayed out from the nozzle 8.

[0018] In this embodiment, the metal casing 2 serves as the main container, bearing the internal pressure and storing the extinguishing agent. Its outer wall is fixedly connected to the inner wall of the engine compartment. The protective shell 6 acts as a "safe house" for critical components, isolating them from the extinguishing agent to ensure that the circuitry and pyrotechnics are not interfered with, while also guiding the generated gas.

[0019] In the specific implementation process, such as Figure 1As shown, the outer wall of the nozzle 8 is threaded with a circular sealing cap 10, and a safety diaphragm 9 is installed inside the sealing cap 10. The safety diaphragm 9 is used to block the nozzle 8.

[0020] In this embodiment, the safety diaphragm 9 is a precisely calculated weak point. Under normal circumstances, it seals the nozzle 8 to prevent moisture from entering and the extinguishing agent from becoming damp and clumping. When the device is activated and the internal pressure reaches the set value, it will automatically burst, releasing the extinguishing agent. More importantly, it acts as a safety pressure relief device; if a malfunction causes an abnormal increase in internal pressure, the diaphragm will burst first, preventing the casing from exploding. The sealing cap 10 is used to fix and tighten the safety diaphragm 9, ensuring its correct positioning and sealing.

[0021] In the specific implementation process, such as Figure 1 and Figure 2 As shown, the gas-generating structure 3 includes a gas-generating propellant column 33 filled in the middle of the inner cavity of the protective shell 6 and a cavity pipe 34 filled in the bottom of the inner cavity of the protective shell 6.

[0022] In this embodiment, the propellant column 33 is the core energy source. A specially formulated solid propellant, when ignited, undergoes a violent and controllable combustion reaction, producing a large amount of non-toxic and harmless inert gases (such as nitrogen and carbon dioxide) within milliseconds. The cavity conduit 34, located below the propellant column, serves as a collection and guiding channel for the high-pressure gas. It ensures that the generated high-temperature gas can be smoothly and concentratedly sprayed downwards, impacting the extinguishing agent.

[0023] In the specific implementation process, such as Figure 1 and Figure 2 As shown, the protective shell 6 has connecting grooves 35 on both sides of the bottom, and sealing paper 36 is installed at the connecting grooves 35. The inner side of the sealing paper 36 is in contact with the gas-generating propellant column 33 and the cavity pipe 34.

[0024] In this embodiment, the connecting groove 35 is the opening at the bottom of the protective shell 6, which is the necessary path for high-pressure gas to enter the shell space filled with extinguishing agent. The sealing paper 36 is another sealing barrier. Its function is to prevent moisture and ensure that the gas-generating propellant column 33 is absolutely dry during storage and maintains its effectiveness. When in operation, it is thinner than the safety diaphragm 9 and can be easily broken by the minimum pressure generated by the gas-generating structure 3, with minimal resistance to gas flow.

[0025] In the specific implementation process, such as Figure 2 and Figure 3 As shown, the ignition assembly 4 includes a sealing plug 42 that is clamped at the end of the protective shell 6 and a metal tube 44 that is fixedly installed in the inner cavity of the protective shell 6. A ignition charge 43 is provided in the inner cavity of the protective shell 6 between the metal tube 44 and the sealing plug 42. A piece of cotton paper 47 is installed at the upper opening of the metal tube 44. A jet-shaped output end 45 is provided at the lower end of the metal tube 44. A baffle 46 is provided on the inner edge of the output end 45 to prevent the ignition charge 43 from falling off.

[0026] In this embodiment, the sealing plug 42 seals the upper end of the protective shell 6, providing moisture and dust protection. The ignition-transferring propellant 43 is more sensitive than the gas-generating propellant 33 and is easily ignited by a small electric spark. Once ignited, it produces a stable and intense flame, ensuring reliable ignition of the main gas-generating propellant 33 below. The metal tube 44 serves as the pressure-bearing shell for the ignition-transferring propellant 43 and guides the flame downwards. The baffle 46 secures the propellant; the output end 45 is designed in a "jet-like" shape, which can converge the flame into a high-speed jet, ensuring precise and efficient ignition of the gas-generating propellant 33. The cotton paper 47 is located below the ignition charge 43, sealing the opening at the top of the metal tube 44 to prevent the ignition charge 43 from falling. When the ignition charge 43 is ignited, the cotton paper 47 will burn rapidly, allowing the flame to enter the metal tube 44. Unlike the baffle 46, which prevents the ignition charge 43 from falling into the gas-generating charge 33 when burning, the cotton paper 47 prevents the ignition charge 43 from burning before it is ignited.

[0027] In the specific implementation process, such as Figure 1 and Figure 3 As shown, the power connection assembly 5 includes a power connection port 41 fixedly installed on the top of the protective shell 6, and the ignition head at the lower end of the power connection port 41 is located inside the ignition charge 43.

[0028] In this embodiment, the power connection port 41 is connected to a wire from the fire detection controller (such as a temperature sensing cable). The ignition head is a miniature resistor or bridge wire, installed at the lower end of the power connection port 41 and embedded in the ignition charge 43. When the controller sends a current signal, the ignition head instantly heats up, directly igniting the surrounding ignition charge 43 and initiating the entire sequence.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dry powder fire extinguishing device placed in the engine compartment of an automobile, comprising a canister-shaped metal casing (2), characterized in that: The metal housing (2) is sealed with a top cover (7) on the top, and a protective shell (6) extending downward is provided at the center of the top cover (7). The lower part of the internal space of the protective shell (6) is provided with a gas generating structure (3), the upper part is provided with a fire transmission component (4), and the top of the protective shell (6) is provided with a power receiving component (5) for receiving external start signals. The internal cavity of the metal shell (2) is filled with ultrafine dry powder fire extinguishing agent (1), and a nozzle (8) is provided on the bottom edge of the metal shell (2). The power connection component (5), the fire transmission component (4), and the gas generation structure (3) work together in sequence, so that the high-pressure gas generated by the gas generation structure (3) can drive the ultrafine dry powder fire extinguishing agent (1) to be sprayed out from the nozzle (8).

2. The dry powder fire extinguishing device placed in the engine compartment of an automobile according to claim 1, characterized in that: The nozzle (8) has a threaded annular sealing cap (10) on its outer wall. A safety diaphragm (9) is installed inside the sealing cap (10) to block the nozzle (8).

3. A dry powder fire extinguishing device for placement in an automobile engine compartment according to claim 1, characterized in that: The gas-generating structure (3) includes a gas-generating propellant column (33) filled in the middle of the inner cavity of the protective shell (6) and a cavity tube (34) filled in the bottom of the inner cavity of the protective shell (6).

4. A dry powder fire extinguishing device placed in the engine compartment of an automobile according to claim 3, characterized in that: The protective shell (6) has connecting grooves (35) on both sides of its bottom. A sealing paper (36) is installed in the connecting groove (35). The inner side of the sealing paper (36) is in contact with the gas-generating column (33) and the cavity pipe (34).

5. A dry powder fire extinguishing device for placement in an automobile engine compartment according to claim 1, characterized in that: The ignition assembly (4) includes a sealing plug (42) fitted at the end of the protective shell (6) and a metal tube (44) fixedly installed in the inner cavity of the protective shell (6). A ignition charge (43) is provided in the inner cavity of the protective shell (6) between the metal tube (44) and the sealing plug (42). A piece of cotton paper (47) is installed at the upper opening of the metal tube (44). A jet-shaped output end (45) is provided at the lower end of the metal tube (44). A baffle (46) is provided on the inner edge of the output end (45) to prevent the ignition charge (43) from falling off.

6. A dry powder fire extinguishing device for placement in an automobile engine compartment according to claim 4, characterized in that: The power connection assembly (5) includes a power connection port (41) fixedly installed on the top of the protective shell (6), and the ignition head at the lower end of the power connection port (41) is located inside the ignition column (43).

Images