Fire-fighting spraying system of electric vehicle based on fixed place

Abstract

The invention discloses a fire-fighting spraying system of an electric vehicle based on a fixed place. The fire-fighting spraying system comprises a smoke sensor, a PLC console, a top spraying part and a bottom spraying part, the bottom spraying part comprises a first water pump and a first valve; the top spraying part comprises a second water pump and a second valve; the smoke sensor is fixed at the top of a fixed place; a PLC controller is arranged in the PLC console, and the smoke sensor is in signal connection with the PLC controller; the PLC is in signal connection with the first water pump, the first valve, the second water pump and the second valve. The bottom spraying part is used for automatically and powerfully spraying the bottom of the electric automobile, the fire site is directly struck, and fire spreading is effectively restrained.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and more specifically, to a fire sprinkler system for electric vehicles based in a fixed location. Background Art

[0002] With the rapid transformation of the global automotive industry to the new energy sector, the number of electric vehicles has exploded. However, due to the unique energy system of electric vehicles, especially the large-capacity lithium battery pack, a series of new safety hazards have been brought about, among which the fire risk has become a focus of attention.

[0003] At present, according to the characteristics of electric vehicle fires, most electric vehicle fires are caused by power battery fires. The batteries and the high-voltage wiring harnesses of the batteries are mostly at the bottom of the car, and the battery flames spread from bottom to top.

[0004] However, the original design of existing fire sprinkler systems mostly failed to fully consider the particularity of electric vehicle fires, especially fires that start at the bottom. In the case of a fierce fire, it is impossible to carry out targeted fire extinguishing, and the sprinkler pipes cannot reach the root of the flames. It is often difficult to quickly control the situation in the early stages of the fire, and the fire can only be controlled from spreading. Summary of the invention

[0005] The present application provides a fire sprinkler system for an electric vehicle based on a fixed location, which utilizes a bottom sprinkler to automatically and powerfully spray the bottom of the electric vehicle, directly hitting the fire site and effectively suppressing the spread of the fire.

[0006] The present application provides a fire sprinkler system for an electric vehicle based on a fixed location, comprising a smoke sensor, a PLC console, a top sprinkler part and a bottom sprinkler part;

[0007] The bottom spraying part includes a first water pump and a first valve;

[0008] The top spraying part includes a second water pump and a second valve;

[0009] The smoke sensor is fixed on the top of a fixed place;

[0010] A PLC controller is arranged in the PLC console, and the smoke sensor is connected with the PLC controller by signal; the PLC controller is connected with the first water pump, the first valve, the second water pump and the second valve by signal.

[0011] Preferably, the bottom of the fixed place includes an operation area, an annular groove is provided on the outside of the operation area, a waste liquid groove and a spray water recovery groove are provided on the outside of the annular groove, and a third valve is provided between the annular groove and the waste liquid groove and the spray water recovery groove respectively;

[0012] The source of the top spray section and the bottom spray section is the spray water recovery tank.

[0013] Preferably, the bottom spray part includes a first spray main pipe and a first bottom spray pipe connected to the first spray main pipe, and the first bottom spray pipe is provided with a plurality of nozzle parts, each nozzle part facing the engine or power battery of the electric vehicle.

[0014] Preferably, each nozzle section includes a plurality of first nozzles arranged in a staggered manner.

[0015] Preferably, the bottom spray part further comprises a plurality of second bottom spray pipes connected to the first spray main pipe, and a plurality of second nozzles are arranged along the pipes of the second bottom spray pipes.

[0016] Preferably, the spray direction of the first nozzle is vertically upward, and the spray direction of the second nozzle is toward the central axis of the electric vehicle.

[0017] Preferably, the top spray part includes a second spray main pipe and a plurality of top spray pipes connected to the second spray main pipe, and a plurality of third nozzles are provided along the pipeline of the top spray pipe.

[0018] Preferably, on each top spray pipe, the spray direction of at least one third nozzle in the middle is vertically downward, and the spray directions of the third nozzles on both sides are obliquely downward in opposite directions.

[0019] Preferably, the fixed place also includes a house frame covering the operating area, and a part of the second sprinkler main pipe and the entire top sprinkler pipe are fixed to the inner wall of the top surface of the house frame through a chain structure.

[0020] Preferably, a liquid level sensor and a water replenishment channel connected to an external water source are provided in the spray water recovery tank, the liquid level sensor is connected to a PLC controller signal, and the fourth valve in the water replenishment channel is connected to a PLC controller signal.

[0021] Preferably, a water spray gun is rotatably provided at the bottom of the fixed place, and the water spray gun is arranged outside the operating area.

[0022] Preferably, baffles are provided on the top surface and two opposite side surfaces of the house frame.

[0023] Preferably, the PLC console is provided with a manual switch, which is connected to the PLC controller signal

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0026] Figure 1A structural schematic diagram of an embodiment of a fire sprinkler system for electric vehicles based on a fixed location provided by the present application;

[0027] Figure 2 A schematic diagram of the structure of the top spray part provided for this application;

[0028] Figure 3 A schematic diagram of the structure of the bottom spray part provided for this application;

[0029] Figure 4 This is a schematic diagram of the structure of the spray water recovery tank provided in this application. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] The present application provides a fire sprinkler system for electric vehicles based on a fixed location, which uses the bottom sprinkler to automatically and powerfully spray the bottom of the electric vehicle to directly hit the fire site, and uses the top sprinkler to spray the top of the electric vehicle at the same time. The two-way action helps to quickly cool down and effectively suppress the spread of fire. Furthermore, the present application uses a spray water recovery tank to reuse the spray water, saving water resources. In addition, a manual water spray gun is also set on the periphery of the electric vehicle. When the fire is small, the user can flexibly adjust the manual water spray gun to achieve rapid fire extinguishing, shorten the response time, and pre-treat the fire scene as soon as possible.

[0035] It should be noted that in the present application, fixed places refer to places where electric vehicles cannot be moved, such as test sites, assembly sites, disassembly sites, etc. in the research and development and trial production process of electric vehicles. In such places, the internal structure and electrical system may be in an unstable or temporarily constructed state, and the fire risk factors are more complex and diverse. Therefore, it is necessary to build the fire sprinkler system provided in this application.

[0036] As an example, Figure 1 As shown, the bottom of the fixed place 50 includes an operation area 501, which is used for related operations of the electric vehicle, such as disassembly, assembly, etc. Figure 1 In the embodiment shown, a guide column 506 is provided in the operation area 501 to provide guidance for the hoist. At least some parts of the electric vehicle are lifted by the hoist to facilitate the operation of the operator. An annular groove 502 is provided on the outside of the operation area 501. A waste liquid tank 503 and a spray water recovery tank 504 are provided on the outside of the annular groove 502. A third valve is provided between the annular groove 502 and the waste liquid tank 503 and the spray water recovery tank 504. The third valve is connected to the PLC console 30 of the fire sprinkler system (see Figure 1 ) is connected to the PLC controller signal in the annular groove 502 to control the liquid in the annular groove 502 to flow into the waste liquid groove 503 or the spray water recovery groove 504. Figure 1 As shown, a waste liquid bucket 40 is also provided in the waste liquid tank 503 for collecting waste liquid.

[0037] Preferably, if Figure 4 As shown, a liquid level sensor 505 and a water replenishment channel 509 connected to an external water source are provided in the sprinkler water recovery tank 504. The liquid level sensor 505 is connected to the PLC controller signal in the PLC console 30 of the fire sprinkler system, and the fourth valve in the water replenishment channel 509 is connected to the PLC controller signal.

[0038] Preferably, the spray water recovery tank 504 is filled with perfluorohexanone, which has a good fire extinguishing and cooling effect. It leaves no traces after extinguishing the fire, does not leave any material residue on the surface of the equipment, does not corrode or stain electrical and electronic equipment, is conducive to protecting property safety, and is particularly suitable for protecting precision electronic equipment and valuables. It is also an environmentally friendly fire extinguishing material and is friendly to the ozone layer. Preferably, the concentration of perfluorohexanone is 6%.

[0039] Preferably, a liquid level sensor is provided in the waste liquid tank 503 to prevent the waste liquid from overflowing.

[0040] like Figure 1 As shown, the fire sprinkler system for electric vehicles based on fixed locations provided by the present application includes a smoke sensor, a PLC console 30 , a top sprinkler 10 and a bottom sprinkler 60 .

[0041] The bottom spray part 60 includes a first water pump and a first valve, and the source of the bottom spray part is the spray water recovery tank 504. The top spray part 10 includes a second water pump and a second valve, and the source of the top spray part 10 is the spray water recovery tank 504.

[0042] The PLC console 30 is provided with a PLC controller, which is connected to the first water pump, the first valve, the second water pump and the second valve by signal. The PLC controller controls the opening or closing of the first valve and the second valve and the opening degree of the valve, and the PLC controller controls the motor speed of the first water pump and the second water pump to control the spray flow of the bottom spray part 60 and the top spray part 10.

[0043] The smoke sensor is fixed on the top of the fixed place 50, and the smoke sensor is connected to the PLC controller by signal. The smoke sensor sends the smoke density signal detected in the fixed place to the PLC controller, and the PLC controller determines whether a fire occurs according to the smoke density signal.

[0044] Preferably, the PLC console 30 is provided with a manual switch, which is connected to the PLC controller signal. If the smoke sensor fails to work, the operator can turn on the manual switch when a fire occurs, thereby controlling the bottom spray part 60 and the top spray part 10 to start through the PLC controller.

[0045] As an example, Figure 1 and 3 As shown, the bottom spraying part 60 includes a first spraying main pipe 61 and a first bottom spraying pipe 62 connected to the first spraying main pipe 61. The free end of the first spraying main pipe 61 extends into the spraying water recovery tank 504. The first bottom spraying pipe 62 is located directly below the central axis of the electric vehicle. A plurality of nozzle parts 65 are provided on the first bottom spraying pipe 62, and each nozzle part 65 faces the engine or power battery of the electric vehicle. Each nozzle part 65 includes a plurality of first nozzles 66 arranged in a staggered manner. The staggered arrangement can expand the overall spraying area of ​​the nozzle part, so that the sprayed part of the electric vehicle is quickly cooled down.

[0046] exist Figure 3 In the embodiment shown, each nozzle portion 65 is provided with seven first nozzles 66 arranged in a staggered manner to form a circular spraying area. The first bottom spray pipe 62 is provided with three nozzle portions 65, the nozzle portion farthest from the first spray main pipe 61 is used for spraying the engine, and the other two nozzle portions are used for spraying the power battery.

[0047] Preferably, the bottom spraying part 60 further includes a plurality of second bottom spraying pipes 63 connected to the first spraying main pipe 61 , and a plurality of second nozzles 64 are provided along the second bottom spraying pipes 63 . Figure 3 In the illustrated embodiment, the bottom spray portion 60 is provided with two second bottom spray pipes 63 which are symmetrical with respect to the first spray main pipe 61 .

[0048] In this preferred embodiment, as an example, the spraying directions of the first nozzle 66 and the second nozzle 64 are both vertically upward.

[0049] Preferably, if Figure 3 As shown, the spray direction of the first nozzle 66 is vertically upward, and the spray direction of the second nozzle 64 is toward the central axis of the electric vehicle, thereby concentrating the spray water on the engine or the power battery, thereby increasing the cooling speed.

[0050] As an embodiment, the spray pressure of the first nozzle 66 and the second nozzle 64 is 0.05 MPa.

[0051] As an example, Figure 1 and 2 As shown, the top spraying part 10 includes a second spraying main pipe 11 and a plurality of top spraying pipes 12 connected to the second spraying main pipe 11. The lower end of the second spraying main pipe 11 extends into the spraying water recovery tank 504. A plurality of third nozzles 13 are arranged along the top spraying pipe 12.

[0052] As an embodiment, the injection pressure of the third nozzle 13 is 0.05 MPa.

[0053] As an embodiment, the spraying directions of all the third nozzles 13 are vertically downward. Figure 2 shown.

[0054] Preferably, on each top spray pipe 12, the spray direction of at least one third nozzle in the middle is vertically downward, and the spray directions of the third nozzles on both sides are obliquely downward in opposite directions. Figure 2 In the orientation shown, the third nozzle at the left end is inclined toward the second spray main pipe 11 , and the third nozzle at the right end is inclined away from the second spray main pipe 11 .

[0055] On the basis of the above, preferably, Figure 1 As shown, the fixed place 50 also includes a house frame 508 covering the operating area 501, and a part of the second sprinkler main pipe 11 and the entire top sprinkler pipe 12 are fixed to the inner wall of the top surface of the house frame 508 through a chain structure.

[0056] like Figure 2 As shown, the chain structure includes a chain bracket and a chain 14 installed on the chain bracket. A hook lock 15 is provided at the upper end of the chain bracket. The hook lock 15 is connected to the inner wall of the top surface of the house frame 508 through bolts. A hook lock clamp 16 is provided at the lower end of the chain bracket. The clamp 16 is fastened to the top sprinkler pipe 12, thereby fixing the top sprinkler pipe 12 on the house frame 508.

[0057] Preferably, baffles 507 are provided on the top surface and two opposite sides of the housing frame 508. The baffles are made of fireproof materials, and high-grade fireproof materials can isolate flames in the first place and prevent the flames from spreading.

[0058] Preferably, a water spray gun 20 is rotatably provided at the bottom of the fixed place 50, and the water spray gun 20 is arranged outside the operation area 501. A valve for controlling the start of the water spray gun 20 is provided on the PLC console 30, and the valve is used to control the on and off of the spray water in the water spray gun 20.

[0059] As an embodiment, the water spray gun 20 includes a rotating base rotatably arranged (for example, by a ball link) on the bottom of the fixed place 50, a gun handle detachably arranged on the rotating base, and a water gun head fixed on the gun handle, and the water gun head is connected to the water source in the fire fighting pipe through a pipe. The operator can rotate the gun handle to adjust the spray angle while keeping the gun handle on the rotating base, or separate the gun handle from the rotating base to adjust the spray angle and spray distance, thereby realizing manual fire extinguishing.

[0060] Preferably, the PLC console is also provided with an emergency stop switch, which is respectively connected to the first water pump, the first valve, the second water pump and the second valve signals for controlling these valves and water pumps to stop working in an emergency.

[0061] When there is no fire risk, the PLC controller determines that the fixed place is safe through the smoke concentration signal. At this time, the PLC controller controls the valve of the spray water recovery tank to close and the valve of the waste liquid tank to open. The harmful liquids produced by the brake fluid and refrigerant caused by the disassembly of the electric vehicle will flow into the waste liquid barrel in the waste liquid tank. The sewage will be treated separately to achieve independent recovery of spray water and waste liquid. At the same time, the PLC controller will judge whether the waste liquid tank is full in real time based on the liquid level signal transmitted by the liquid level sensor of the waste liquid tank.

[0062] When a fire occurs in a disassembled electric vehicle, thick smoke will be emitted, and the smoke sensor will trigger an alarm. The analog signal output by the smoke sensor is output to the PLC controller through analog quantity. The PLC controller controls the top and bottom spray parts to start above and below the vehicle, and controls the speed of the water pump and the opening of the valve according to the preset spray mode and strategy, and adjusts the spray water volume and coverage. For example, in the early stage of a fire, the PLC controller controls the top and bottom spray parts to spray the center area of ​​the flame (such as the engine and power battery parts) with a large amount of water and a more concentrated coverage area to suppress the development of the fire. At the same time, the valve of the spray water recovery tank is opened, and the valve of the waste liquid tank is closed. The fire extinguishing liquid sprayed from the vehicle body flows into the annular groove and then into the spray water recovery tank, which serves as a reserve energy for the next fire extinguishing. If the smoke sensor detects an increase in smoke concentration, the PLC controller controls the water spray volume of the top sprinkler and the bottom sprinkler; if the smoke sensor detects a decrease in smoke concentration, the current water spray volume is maintained or reduced. After a preset time, if the smoke concentration is less than the threshold, the PLC controller controls the top sprinkler and the bottom sprinkler to close; otherwise, the top sprinkler and the bottom sprinkler are controlled to continue working.

[0063] When the fire sprinkler system continues to extinguish the flame, if the water volume in the sprinkler water recovery tank is insufficient, when the liquid level is lower than the set warning level, the liquid level sensor transmits a signal to the PLC controller, and the PLC controller starts the automatic water replenishment program, automatically controls the fourth valve connected to the water replenishment channel and the fire hydrant to open, and the connected fire water flows into the sprinkler water recovery tank through the water replenishment channel under the action of gravity, realizing automatic water replenishment; when the liquid level returns to the normal level, the fourth valve is closed. The entire process does not require manual intervention and is completely completed automatically by the PLC controller, ensuring the continued effectiveness of the fire sprinkler system during long-term fire extinguishing operations.

[0064] If the smoke sensor fails to work, the operator can turn on the manual switch of the PLC console to control the start of the top and bottom sprinkler parts. In this mode, the speed of the water pump motor and the opening of the valve are fixed. When the fire is small, the operator can open the valve of the water spray gun and operate the water spray gun to spray water in a targeted manner at the flamed part.

[0065] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A fire sprinkler system for electric vehicles based on a fixed location, characterized in that: It includes smoke sensor, PLC console, top sprinkler and bottom sprinkler; The bottom spraying part includes a first water pump and a first valve; The top spraying part includes a second water pump and a second valve; The smoke sensor is fixed on the top of a fixed place; A PLC controller is provided in the PLC console, and the smoke sensor is connected to the PLC controller by signal; the PLC controller is connected to the first water pump, the first valve, the second water pump and the second valve by signal.

2. The fire sprinkler system for electric vehicles based on fixed locations according to claim 1, characterized in that: The bottom of the fixed place includes an operation area, an annular groove is provided on the outside of the operation area, a waste liquid groove and a spray water recovery groove are provided on the outside of the annular groove, and a third valve is provided between the annular groove and the waste liquid groove and the spray water recovery groove respectively; The source of the top spray part and the bottom spray part is the spray water recovery tank.

3. The fire sprinkler system for electric vehicles based on a fixed location according to claim 1, characterized in that: The bottom spray part includes a first spray main pipe and a first bottom spray pipe connected to the first spray main pipe. The first bottom spray pipe is provided with a plurality of nozzle parts, and each nozzle part faces the engine or power battery of the electric vehicle.

4. The fire sprinkler system for electric vehicles based on fixed locations according to claim 3 is characterized in that: Each nozzle section includes a plurality of first nozzles arranged in a staggered manner.

5. The fire sprinkler system for electric vehicles based on fixed locations according to claim 4, characterized in that: The bottom spray part also includes a plurality of second bottom spray pipes connected to the first spray main pipe, and a plurality of second nozzles are arranged along the pipeline of the second bottom spray pipe.

6. The fire sprinkler system for electric vehicles based on fixed locations according to claim 5, characterized in that: The spray direction of the first nozzle is vertically upward, and the spray direction of the second nozzle is toward the central axis of the electric vehicle.

7. The fire sprinkler system for electric vehicles based on a fixed location according to claim 2, characterized in that: The top spray part includes a second spray main pipe and a plurality of top spray pipes connected to the second spray main pipe, and a plurality of third nozzles are arranged along the pipeline of the top spray pipe.

8. The fire sprinkler system for electric vehicles based on fixed locations according to claim 7, characterized in that: On each top spray pipe, the spray direction of at least one third nozzle in the middle is vertically downward, and the spray directions of the third nozzles on both sides are oriented obliquely downward in opposite directions.

9. The fire sprinkler system for electric vehicles based on fixed locations according to claim 7, characterized in that: The fixed place also includes a house frame covering the operating area, and a part of the second sprinkler main pipe and the entire top sprinkler pipe are fixed to the inner wall of the top surface of the house frame through a chain structure.

10. The fire sprinkler system for electric vehicles based on a fixed location according to claim 2, characterized in that: A liquid level sensor and a water replenishment channel connected to an external water source are provided in the spray water recovery tank, the liquid level sensor is connected to the PLC controller signal, and the fourth valve in the water replenishment channel is connected to the PLC controller signal.

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