New energy automobile fire diffusion prevention system in closed or semi-closed space

Abstract

The invention provides a new energy automobile fire diffusion prevention system in a closed or semi-closed space. The system comprises a fire-fighting smoke exhaust fan, a ventilation pipeline, a ventilation valve, an exhaust hood, a flame-retardant pipeline, a flame-retardant valve, a main pipeline and a fan. When a fire behavior is detected, the ventilation valve and the fire-fighting smoke exhaust fan are opened, the fire-fighting smoke exhaust fan extracts air, a local negative pressure area is created above a fire-catching vehicle, pressure difference is formed, smoke is guided to be exhausted through a pipeline, and meanwhile, an air curtain wall is formed around the fire-catching vehicle through the exhaust hood to isolate oxygen in the surrounding environment from participating in combustion. Meanwhile, the flame-retardant pipeline installed underground the parking space starts to work, the flame-retardant valve is opened, flame-retardant gas is sprayed to the vehicle on fire, a flame-retardant gas barrier is formed around the vehicle on fire, an air curtain wall is assisted in isolating oxygen, participating in combustion reaction and absorbing heat to reduce the flame temperature, and safety guarantee is provided for surrounding vehicles which are not on fire. The risk of fire diffusion can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fire safety technology, and in particular to a new energy vehicle fire spread prevention system in a closed or semi-closed space. Background Art

[0002] New energy vehicles, especially electric vehicles (EVs), are gradually replacing traditional fuel vehicles worldwide. This is due to their lower environmental impact, lower operating costs, and support from national policies. However, as the number of such vehicles increases, their safety has also become a focus of attention. Currently, about 34% of electric vehicle fires occur during the stationary stage and 24% during the charging stage, indicating that new energy vehicles parked in garages have a higher risk of combustion and explosion.

[0003] When a car burns and explodes, a large amount of flammable, explosive and harmful gases will be produced. Once an explosion occurs, due to the production of harmful gases, people who are not wearing safety measures approaching the burning point have certain risks, and ordinary fire-fighting measures, such as dry powder, carbon dioxide and other fire-fighting agents, cannot completely prevent the combustion of new energy vehicles. Even if the fire is initially controlled, the fire will rekindle. In addition, the temperature of car fires is relatively high. The smoke exhaust fire dampers installed in traditional fuel garages will automatically close at 280°C, and the smoke temperature of new energy vehicle fires can easily exceed 280°C. Therefore, with the accumulation of high-temperature smoke, the fire is very easy to spread and ignite surrounding vehicles, causing a situation where the fire burns the camp. At present, there is no effective way to deal with the burning of new energy vehicles in the garage except waiting for the arrival of firefighters. Summary of the invention

[0004] The present application provides a new energy vehicle fire prevention system in a closed or semi-enclosed space, which can be used to solve the problem of new energy vehicles burning and exploding when parked in a closed or semi-enclosed space and spreading to surrounding vehicles. By combining the flame-retardant pipes installed underground, the flame-retardant gas is sprayed out to participate in the combustion reaction to reduce the temperature and the degree of fire, ensuring that the smoke exhaust system can continue to operate, and can timely discharge flammable, explosive and harmful gases, effectively controlling the spread of the fire and achieving the purpose of fire extinguishing.

[0005] The present application provides a new energy vehicle fire spread prevention system in a closed or semi-closed space, the system comprising a fire smoke exhaust fan, a ventilation duct, an exhaust hood, a ventilation valve, a flame retardant duct, a flame retardant valve, a main duct and a fan, and a fire sensor provided in an underground garage; the system is arranged in a closed or semi-closed parking lot;

[0006] The ventilation duct is installed in the space above the parking space;

[0007] The ventilation valve is installed below the ventilation duct and directly above the exhaust hood, and is connected to the ventilation duct by a connector;

[0008] The exhaust hood is suspended directly above each parking space, located below the ventilation valve, and connected to the ventilation valve;

[0009] The flame retardant pipe is laid along the parking line, buried underground, arranged vertically on the ground, and the air outlet is below the ground;

[0010] The flame retardant valve is installed on the pipeline between the flame retardant pipeline and the main pipeline, and is connected by a connector;

[0011] The main pipeline is installed at the front or rear of the vehicle; the main pipeline is connected to the flame-retardant pipeline;

[0012] The fan is installed at one end of the main pipeline.

[0013] Furthermore, the ventilation valve is in an open state under normal conditions. When a fire occurs, only the target ventilation valve above the burning vehicle remains open, and the ventilation valves above the remaining vehicles are closed, ensuring that the exhaust airflow has a sufficient flow rate to form a negative pressure area.

[0014] Furthermore, the minimum height of the exhaust hood from the ground is 2.2m, and the size of the exhaust hood should not be too large, so that the air curtain formed just surrounds the burning vehicle;

[0015] The shape of the exhaust hood opening includes any one of a circle and a rectangle.

[0016] Furthermore, the flame-retardant pipe surrounds the entire parking space and has small holes facing the ground for spraying flame-retardant gas toward the burning vehicle.

[0017] Furthermore, another installation form of the flame retardant pipe is that the flame retardant pipe is facing the center of the parking space, that is, the position of the lithium battery pack under the new energy vehicle.

[0018] Furthermore, the flame retardant valve is usually in a closed state. When a disaster occurs, the flame retardant valve corresponding to the burning vehicle below is opened, and the flame retardant gas in the main pipeline is sprayed toward the burning vehicle;

[0019] Furthermore, the main pipeline is filled with flame-retardant gas or flame-retardant liquids such as water and fine water mist, connected to all other flame-retardant pipelines, and controlled by flame-retardant valves;

[0020] When the main pipeline contains flame-retardant liquid, the fan is replaced by a water pump.

[0021] Furthermore, the fan is installed at the end of the main pipeline to provide power for the system when it starts to spray the flame-retardant gas, thereby ensuring that the flame-retardant gas can be spread around the burning vehicle at the first moment of the disaster.

[0022] Furthermore, the flame-retardant pipeline is installed underground, and the flame-retardant valve and the main pipeline are installed under the ground or on the ground.

[0023] Furthermore, when a fire occurs, the fire smoke exhaust fan quickly exhausts air, using the high-speed flowing air to create a pressure difference with the surrounding environment, so that the pressure in the area directly above the parking space is lower than the surrounding environment, creating a local negative pressure area above the burning vehicle;

[0024] The airflow guides the smoke to be discharged outward through the ventilation duct, and forms an air curtain wall around the burning vehicle body with the help of the shape of the exhaust hood, isolating the oxygen in the environment from participating in the combustion and limiting the spread of flames and harmful gases;

[0025] At the same time, the flame-retardant pipe sprays flame-retardant gas or flame-retardant liquid from bottom to top around the burning vehicle, assisting in forming an air curtain wall, participating in the combustion reaction to absorb the heat of combustion to reduce the temperature of the flame, thereby providing additional safety protection for surrounding vehicles that are not on fire.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] 1. Using the principle of pressure difference, a local negative pressure area is created. The air curtain formed can strongly isolate the oxygen in the environment from participating in combustion, which can reduce the fire intensity. The airflow can be used to limit the flame to the burning vehicle, reducing the possibility of it spreading to surrounding vehicles.

[0028] 2. Installing flame-retardant pipes underground can deliver the fire-extinguishing medium to the fire source, the lithium battery pack, more easily, thereby reducing the fire from the source, effectively solving the problem that the automatic sprinkler device in the underground garage is difficult to reach the fire source, and increasing the possibility of fire extinguishing for new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An isometric structural diagram of a surrounding flame-retardant piping system provided in an embodiment of the present application;

[0030] Figure 2 A side view of a surrounding flame-retardant pipe provided in an embodiment of the present application;

[0031] Figure 3 An isometric structural diagram of a flame-retardant pipe system provided in an embodiment of the present application;

[0032] Figure 4 A side view of a flame-retardant pipe provided in an embodiment of the present application;

[0033] Among them, the serial numbers represent the following meanings: 1-fire smoke exhaust fan; 2-ventilation duct; 3-exhaust hood; 4-ventilation valve; 5-new energy vehicle; 6-flame retardant duct; 7-flame retardant valve; 8-main duct; 9-fan; 10-ground. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0035] The following first introduces the embodiments of the present application in conjunction with the accompanying drawings.

[0036] Embodiment 1

[0037] like Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a new energy vehicle fire spread prevention system in a closed or semi-closed space, comprising a fire smoke exhaust fan (1), a ventilation duct 2, an exhaust hood 3, a ventilation valve 4, a flame retardant duct 6, a flame retardant valve 7, a main duct 8 and a fan 9.

[0038] Specifically, when a fire occurs, the remaining ventilation valves 4 are closed, and the ventilation valve 4 above the burning vehicle remains open.

[0039] The fire smoke exhaust fan starts to exhaust smoke. Due to the closure of other ventilation valves, only the ventilation valve above the burning vehicle is open. Therefore, the air from this exhaust port will be discharged at a higher flow rate, which will form an air curtain around the burning vehicle, isolating the oxygen in the environment from participating in the combustion and limiting the spread of the flame.

[0040] At the same time, the flame retardant valve 7 and the fan 9 are opened in the event of a disaster, and the main pipeline transports flame retardant gas into the flame retardant pipeline.

[0041] The flame retardant valve 7 and the fan 9 are opened in the event of a disaster. After the flame retardant pipe 6 is filled with gas, the flame retardant gas is sprayed toward the burning vehicle. The flame retardant gas surrounds the burning vehicle, participates in the combustion reaction, reduces the fire, and assists in forming an air curtain.

[0042] Embodiment 2

[0043] like Figure 3 and Figure 4 As shown, an embodiment of the present invention proposes another form of a new energy vehicle fire spread prevention system in a closed or semi-closed space, including a fire smoke exhaust fan 1, a ventilation duct 2, an exhaust hood 3, a ventilation valve 4, a flame retardant duct 6, a flame retardant valve 7, a main duct 8 and a fan 9.

[0044] Specifically, when a fire occurs, the remaining ventilation valves 4 are closed, and the ventilation valve 4 above the burning vehicle remains open.

[0045] The fire smoke exhaust fan starts to exhaust smoke. Due to the closure of other ventilation valves, only the ventilation valve above the burning vehicle is open. Therefore, the air from this exhaust port will be discharged at a higher flow rate, which will form an air curtain around the burning vehicle, isolating the oxygen in the environment from participating in the combustion and limiting the spread of the flame.

[0046] At the same time, the flame retardant valve 7 and the fan 9 are opened in the event of a disaster, and the main pipeline transports flame retardant gas into the flame retardant pipeline.

[0047] The flame retardant valve 7 and the fan 9 are opened in the event of a disaster. After the flame retardant pipe 6 is filled with gas, the flame retardant gas is sprayed toward the lithium battery at the bottom of the train car, participating in the combustion reaction, reducing the fire, and assisting in forming an air curtain.

[0048] The above is a detailed introduction to the new energy vehicle fire spread prevention system in a closed or semi-closed space provided by the patent of the present invention. For a general technician in this field, according to the idea of ​​the embodiment of the patent of the present invention, there will be changes in the specific implementation method. In summary, the content of this specification should not be understood as a limitation on the patent of the present invention.

Claims

1. A new energy vehicle fire spread prevention system in a closed or semi-closed space, characterized in that: The system comprises a fire smoke exhaust fan (1), a ventilation duct (2), an exhaust hood (3), a ventilation valve (4), a flame retardant duct (6), a flame retardant valve (7), a main duct (8) and a fan (9), as well as a fire sensor provided in an underground garage; the system is arranged in a closed or semi-closed parking lot; The ventilation duct (2) is installed in the space above the parking space; The ventilation valve (4) is installed below the ventilation duct and directly above the exhaust hood (3), and is connected to the ventilation duct (2) by a connecting piece; The exhaust hood (3) is suspended directly above each parking space, located below the ventilation valve (4), and connected to the ventilation valve (4); The flame retardant pipe (6) is laid along the parking line, buried underground, arranged vertically on the ground, and the air outlet is below the ground; The flame retardant valve (7) is installed on the pipeline between the flame retardant pipeline (6) and the main pipeline (8), and is connected by a connector; The main pipeline (8) is installed at the front or rear of the vehicle; the main pipeline (8) is connected to the flame-retardant pipeline (6); The fan (9) is installed at one end of the main pipeline (8).

2. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The ventilation valve (4) is in an open state under normal conditions. When a fire occurs, only the target ventilation valve above the burning vehicle remains open, and the ventilation valves (4) above the remaining vehicles are closed.

3. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The minimum height of the exhaust hood (3) from the ground is 2.2 m; The shape of the exhaust hood opening includes any one of a circle and a rectangle.

4. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The flame retardant pipe (6) surrounds the entire parking space and has small holes facing the ground for spraying flame retardant gas toward the burning vehicle.

5. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 4, characterized in that: Another installation form of the flame retardant pipe (6) is that the flame retardant pipe (6) is directly opposite to the center of the parking space, that is, the position of the lithium battery pack under the new energy vehicle.

6. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The flame retardant valve (7) is normally in a closed state. When a disaster occurs, the flame retardant valve corresponding to the bottom of the burning vehicle opens, and the flame retardant gas in the main pipeline is sprayed toward the burning vehicle.

7. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The main pipeline (8) is filled with flame-retardant gas or flame-retardant liquid, is connected to all other flame-retardant pipelines (6), and is controlled by a flame-retardant valve (7); When the main pipeline is filled with flame-retardant liquid, the fan (9) is replaced with a water pump.

8. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The fan (9) is installed at the end of the main pipeline (8) to provide power when the system starts to spray the flame-retardant gas, thereby ensuring that the flame-retardant gas can be spread around the burning vehicle at the first moment of the disaster.

9. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: The flame retardant pipeline (6) is installed underground, and the flame retardant valve (7) and the main pipeline (8) are installed under the ground or on the ground.

10. A new energy vehicle fire spread prevention system in a closed or semi-closed space according to claim 1, characterized in that: When a fire occurs, the fire smoke exhaust fan quickly exhausts air and uses the flowing air to create a pressure difference with the surrounding environment, making the pressure in the area directly above the parking space lower than the surrounding environment, creating a local negative pressure area above the burning vehicle; The airflow guides the smoke to be discharged outward through the ventilation duct, and forms an air curtain wall around the burning vehicle body with the help of the shape of the exhaust hood, isolating the oxygen in the environment from participating in the combustion and limiting the spread of flames and harmful gases; At the same time, the flame-retardant pipe sprays flame-retardant gas or flame-retardant liquid from bottom to top around the burning vehicle, assisting in forming an air curtain wall, participating in the combustion reaction to absorb the heat of combustion to reduce the temperature of the flame.

Images