CN215995374U - Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station - Google Patents
Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station Download PDFInfo
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- CN215995374U CN215995374U CN202122282326.6U CN202122282326U CN215995374U CN 215995374 U CN215995374 U CN 215995374U CN 202122282326 U CN202122282326 U CN 202122282326U CN 215995374 U CN215995374 U CN 215995374U
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Abstract
An acoustic low-pressure water mist fire extinguishing prevention and control device for a battery box of an energy storage power station comprises a gas storage bottle group, a pressure reducing device, a water storage bottle group, a partition control valve, a water mist fire extinguishing nozzle, a connecting pipeline, a pipe fitting, a composite detector, a driving module and a linkage controller; the gas storage cylinder group is provided with a container valve connected with a pressure reducing device, the outlet of the pressure reducing device is divided into two paths, and one path of gas is connected with a gas interface of a water mist spray head arranged on the battery box through a first partition control valve; the other path of gas is connected to a water storage bottle group, and a liquid outlet of the water storage bottle group is connected with a partition control valve II and is connected with a liquid inlet interface of the spray head; the composite detector is arranged in the battery box, is connected with the driving module and the partition control valve outside the battery box, and is then connected to the linkage controller. The utility model is provided with a set of fire-extinguishing prevention and control device, which can quickly and effectively extinguish fire, can effectively inhibit the early thermal runaway behavior of the lithium battery, and has double protection effects of 'elimination' and 'prevention'.
Description
Technical Field
The utility model belongs to the technical field of fire extinguishing prevention and control devices, and particularly relates to an acoustic low-pressure water mist fire extinguishing prevention and control device for a battery box of an energy storage power station.
Background
The energy storage power station is also called as a lithium ion battery energy storage system and mainly used for providing a reservoir for clean energy. Clean energy represented by hydroelectric power, solar energy and wind energy is a main force for reducing carbon emission, but the biggest defect of the clean energy is instability. Electricity cannot be stored, the power grid can allocate power of the power plant to be on the grid according to the power consumption requirement of a user end, clean energy does not have thermal power and nuclear power, the clean energy is convenient to obtain, and solar energy and wind energy grid connection seriously depends on an energy storage system.
The battery box (pack) in the battery compartment of the energy storage power station is a key point of easily generating fire or explosion, and the energy storage power station generates a plurality of accidents of combustion and explosion at home and abroad. In 2021, the international lithium battery fire safety seminar in China, through research, test and demonstration for several years, a plurality of scientific research institutions put forward a relatively clear idea about the cause of thermal runaway of lithium batteries and the fire extinguishing medium adopted to efficiently extinguish fire and control fire, and the like:
the fine water mist is the best fire extinguishing scheme of the lithium ion battery, can be rapidly dispersed to the whole protection area, absorbs a large amount of heat, and enables the surface of a combustible to be rapidly cooled, so that the fire extinguishing and controlling effects are achieved.
And the lithium ion battery is extremely easy to re-combust, so that the fire extinguishing device is required to have the function of multiple intermittent spraying.
The fire extinguishing device can quickly and effectively extinguish fire, can effectively inhibit the early thermal runaway of the lithium ion battery, and has double protection effects of 'elimination' and 'prevention'.
Up to now, a fire extinguishing prevention and control device capable of simultaneously meeting the above requirements is still a blank.
Disclosure of Invention
The utility model aims to provide an acoustic low-pressure water mist fire extinguishing prevention and control device for a battery box of an energy storage power station, aiming at the defects of the fire extinguishing prevention and control technology of the battery box of the energy storage power station, so that the device has the advantages of high-efficiency cooling and quick fire extinguishing; can intermittently spray for many times and prevent re-combustion; the same fire-extinguishing control device realizes the dual protection functions of 'fire extinguishing' and 'fire prevention'.
The technical scheme for realizing the purpose of the utility model is as follows:
an acoustic low-pressure water mist fire extinguishing prevention and control device for a battery box of an energy storage power station comprises a gas storage bottle group, a pressure reducing device, a water storage bottle group, a partition control valve, an acoustic low-pressure water mist fire extinguishing nozzle, a connecting pipeline and a pipe fitting; the device comprises a composite detector, a driving module and a linkage controller. The gas storage cylinder group is provided with a container valve group which can be automatically opened and closed and is connected with a pressure reducing device, the outlet of the pressure reducing device is divided into two paths, and one path of gas is connected with a gas interface of a water mist spray head arranged on the battery box through a first partition control valve; the other path of gas is connected to a water storage bottle group, and a liquid outlet of the water storage bottle group is connected with the other partition control valve II and is connected with a liquid inlet interface of the spray head. The composite detector is arranged in the battery box, is connected with the driving module outside the battery box, the first partition control valve and the second partition control valve and then is connected to the coupling controller; a canister valve block on the gas canister block is also coupled to the linkage controller.
The acoustic low-pressure water mist fire extinguishing nozzle comprises a bolt, a nut, a body, a cone, a resonance body, a shell and an upper cover, wherein the resonance body and the cone are connected together through the bolt; the cone and the body are connected into a whole by a nut; the upper end of the body is provided with a nozzle air inlet interface, and an elastic washer is arranged at the connection position of the nut in consideration of the impact effect of air flow. The shell is in threaded connection with the body, the upper cover is in threaded connection with the shell and the body, a gas distribution hole is formed in the inner wall of the body, and a horn-shaped cavity is formed between the body and the outer conical surface of the cone and communicated with the gas distribution hole. The water diversion slotted hole is arranged at the lower end of the body near the outer diameter, the water inlet ports of the nozzles are arranged on the side walls of the shell and the body, the water inlet ports are communicated with the water diversion slotted hole, the sealing rings for preventing water leakage are arranged at the gaps between the body and the shell at the upper and lower positions of the water inlet port holes, and the gap between the body and the resonance body forms a fine water mist spray outlet. The low-pressure water mist nozzle is a double-fluid low-pressure open nozzle, and gas generates sound waves at the nozzle, so that water flowing out of the nozzle is rapidly atomized for extinguishing fire.
The gas storage cylinder group stores nitrogen gas with certain pressure, the electromagnetic driving device on the container valve opens the container valve to release the gas after receiving the starting signal, the container valve has the function of automatic opening and closing, and the container valve is provided with a pressure gauge and a safety relief device. The pressure reducing device is preset with pressure reducing outlet pressure, and the high-pressure gas released by the gas storage cylinder group is reduced in pressure and then is conveyed to a downstream pipeline. The pressure reducing device is provided with a pressure gauge or a pressure sensor. The water storage bottle group stores water with certain mass, the air inlet end of the bottle valve is provided with a one-way valve, and the water outlet is connected to the first partition control valve.
And the first zone control valve and the second zone control valve can receive control signals and automatically open, so that the water mist spray nozzles spray water mist to the corresponding protection zones, and the control valves are used for cooling and extinguishing fire.
The composite detector has the functions of detecting temperature, smoke and carbon monoxide, and sends out an alarm signal when indexes in the protection area exceed values.
The linkage controller has the functions of automatic starting and manual starting, the container valve and the partition control valve of a certain protection area can be opened according to preset spraying time, the container valve is automatically closed when the spraying time is up, the container valve is automatically opened after the set gap time, the second spraying is carried out, and the operation is not less than three times.
The working principle of the utility model is as follows:
(1) a composite detector arranged in the battery box detects that the index of temperature or smoke or carbon monoxide in the box exceeds the value, an alarm signal is sent to a linkage controller, the linkage controller opens a container valve and a partition control valve of the battery box according to preset spraying time, the container valve divides airflow into two paths through a pressure reducing device after being opened, and one path is directly conveyed to a water mist spray head to generate ultrasonic waves; and the other path of water of the water storage bottle group is conveyed to the fine water mist spray head and is acted by ultrasonic waves to form superfine water mist, the superfine water mist is sprayed into the battery box to cool and extinguish fire, the spraying time is up, the container valve is automatically closed, the container valve is automatically opened after the set gap time, the spraying for the second time is carried out, and the operation is not less than three times.
(2) After the container valve is opened, the high-pressure gas of the gas storage bottle group flows out, is decompressed by the decompression device and is output.
(3) The gas output by pressure reduction is divided into two paths, one path of the gas is conveyed to the water storage bottle group, the water in the water storage bottle group is pressed out, and the water flows through the opened partition control valve and is conveyed to the water mist spray head; the other path of gas is delivered to a water mist spray head through a pipeline and a partition control valve.
(4) The acoustic low-pressure water mist spray head arranged on the lithium ion battery box generates ultrasonic waves under the action of gas to atomize water rapidly, and the generated water mist is sprayed into the battery box rapidly to cool and extinguish fire.
The utility model has the following remarkable effects:
1. fire extinguishing and suppression: set up one set of fire prevention and control device and can effectually put out the conflagration fast, can effectively restrain the early thermal runaway action of lithium cell again, played the duplicate protection effect of "disappearing" and "preventing".
(1) Fire extinguishing: the fire of the lithium battery is extinguished under the double actions of nitrogen and water mist, and the nitrogen serves as an inhibitor and can dilute the oxygen concentration; the fine water mist quickly spreads to the whole battery box space, the temperature in the box is quickly reduced, so that the fire is quickly extinguished, and the extinguishing time of a single battery box is not more than 10 s.
(2) Inhibition: when the temperature in the battery box reaches a critical point, the system is started to spray, the spraying time is not less than the fire extinguishing time, and the fine water mist is rapidly dispersed to the whole space of the battery box, so that the temperature in the box is rapidly reduced. After an interval of 5min, a second spray was started. The method can perform three to four times of interval spraying, thereby realizing effective inhibition of the early thermal runaway behavior of the lithium battery.
2. According to the utility model, the particle size distribution of the droplets sprayed by the acoustic low-pressure fine water mist spray nozzle is tested, the average particle size range of the fine water mist generated by the spray nozzle is 50-300 mu m, the specific surface area of the water mist is improved by millions times, and the fine water mist instantly vaporizes when encountering flames and absorbs heat to form steam, so that the temperature of a fire scene is reduced, a high-efficiency anoxic environment is formed, and the optimal fire extinguishing principle of cooling and suffocation is achieved.
3. The utility model can not cause short circuit of fire hazard of electrical appliances, and common water can normally extinguish fire below 6000V and is not conductive; if distilled water is selected, the fire can be extinguished under the condition of high pressure of 10KV, and the fire cannot be extinguished and does not conduct electricity, and the explosion reaction with hot oil cannot happen.
4. The utility model has obvious energy-saving effect:
(1) the fire-extinguishing prevention and control device has low pressure grade, is in a low-pressure range, reduces the consumption of water and nitrogen, and meets the requirement of energy conservation.
(2) Due to the adoption of the low-pressure atomization technology, the cost of the fire extinguishing prevention and control device is greatly reduced.
5. The fire extinguishing agent is composed of nitrogen and water, and does not contain other chemicals, carbon dioxide and other substances harmful to the environment.
6. The fire extinguishing prevention and control device can simultaneously protect a plurality of battery boxes.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention.
FIG. 2 is a schematic view of the structure of the acoustic low pressure water mist head of the present invention.
In fig. 1: 1-gas storage bottle group, 2-water storage bottle group, 3-water storage bottle valve, 4-gas pipe, 5-container valve, 6-pressure reducing device, 7-gas pipe, 8-water pipe, 9-pipeline, 10-linkage controller, 11-partition control valve I, 12-low-pressure water mist sprayer, 13-water mist sprayer nozzle, 14-battery box, 15-composite detector, 16-driving module, 17-sprayer water inlet pipe, 18-partition control valve II, 19-sprayer air inlet pipe, 20-bottle storage cabinet and 21-control circuit.
In fig. 2: 22-upper cover, 23-shell, 24-water mist nozzle, 25-resonance body, 26-bolt, 27-cone, 28-body, 29-nut, 30-nozzle water inlet interface and 31-nozzle air inlet interface.
Detailed Description
The embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, an acoustic low-pressure water mist fire extinguishing and preventing and controlling device for a battery box of an energy storage power station is characterized in that a gas storage bottle group 1, a container valve 5, a pressure reducing device 6, a water storage bottle group 2 and a water storage bottle valve 3 are arranged in a bottle storage cabinet 20 of the device; the air pipe 7 is connected to the first zone control valve 11, and the water pipe 8 is connected to the second zone control valve 18; the nozzle air inlet pipe 19 is connected with the first partition control valve 11 and the nozzle air inlet interface 31, and the nozzle water inlet pipe 17 is connected with the second partition control valve 18 and the nozzle water inlet interface 30.
The low-pressure water mist sprayer 12 is fixed on the battery box 14, and the water mist sprayer nozzle 13 is positioned inside the battery box 14.
The composite detector 15 is arranged inside the battery box 14, is connected with the driving module 16, the first partition control valve 11 and the second partition control valve 18 outside the box through a control line 21 and is connected to the linkage controller 10, and the container valve 5 on the gas storage cylinder group 1 is connected to the linkage controller 10 through the control line 21.
The acoustic low-pressure water mist fire extinguishing nozzle 12 comprises a bolt 26, a nut 29, a body 28, a cone 27, a resonance body 25, a shell 23 and an upper cover 22, wherein the resonance body 25 and the cone 27 are connected together through the bolt 26; the cone 27 and the body 28 are connected into a whole by a nut 29; the body 28 is provided with a nozzle inlet port 31 and a characteristic washer is provided at the coupling position of the nut 29 in consideration of the impact of the air flow. The upper cover 22 is in threaded connection with the shell 23, a gas diversion hole is formed in the inner wall of the body 28, a water diversion slotted hole is formed in the body, a sprayer water inlet interface 30 is arranged on the shell 23, a sealing ring for preventing water leakage is arranged at the gap between the body 28 and the shell 23, and a fine water mist nozzle 24 is formed between the body 28 and the resonance body 25. The resonator body 25 is specially designed to comply with acoustic principles.
The working flow of the fire extinguishing prevention and control of the device of the utility model is described below with reference to fig. 1 and 2:
the gas storage bottle group 1 stores nitrogen with the pressure of 15MPa, the water storage bottle group 2 stores water with certain mass, and the container valve 5, the first partition control valve 11 and the second partition control valve 18 are in a closed state; the linkage controller 10 and the composite detector 15 are in operation.
When a composite detector 15 in a certain battery box 14 detects that the index of temperature or smoke or carbon monoxide in the box exceeds the value, an alarm signal is sent to a linkage controller 10, the linkage controller 10 opens a container valve 5 and a first subarea control valve 11 and a second subarea control valve 18 of the battery box according to preset spraying time, the container valve 5 divides airflow into two paths through a pressure reducing device 6 after opening, and one path is conveyed to a resonance body 25 of a water mist spray head 12 through a gas conveying pipe 7 and the opened first subarea control valve 11 to generate ultrasonic waves; the other path enters a water storage bottle group 2 through a gas pipe 4, water in the water storage bottle group 2 is pressurized and then is conveyed to a fine water mist spray nozzle 12 through a water conveying pipe 8 through a partition control valve II 18 and is subjected to ultrasonic action to form ultra-fine water mist, the ultra-fine water mist is sprayed into a battery box 14 at a fine water mist spray nozzle 13 to be cooled and put out of fire, the linkage controller 10 automatically closes the container valve 5 when the spraying time is up, and after the set gap time, the linkage controller 10 automatically opens the container valve 5 to carry out the second spraying, and the steps are not less than three times.
The fire extinguishing process with the generation of water mist according to the utility model is described further below with reference to fig. 2:
the water path and the gas path in the acoustic low-pressure water mist fire extinguishing nozzle 12 are separated. The gas with the pressure of 0.5MPa +/-0.3 MPa enters the nozzle gas inlet interface 31 to reach the body 28, is divided by the gas dividing holes, enters a cavity formed by the body 28 and the outer conical surface of the cone 27, is sprayed out by secondary division formed by the body 28 and the cone 27, strikes the resonance body 25, and is sprayed out by the water mist nozzle 24. Water with the pressure of 0.03MPa-0.1MPa enters the circular ring formed by the shell 23 and the body 28 from the water inlet interface 30 of the spray head, and because the left and the right are sealed by the sealing rings, the water cannot leak from the interior of the spray head and then is sprayed out from the water diversion slotted hole. At this time, the water flowing out of the head is instantaneously atomized into fine mist droplets by the sound wave generated from the resonating body 25, and the fine mist droplets are ejected from the fine mist ejection openings 24 and rapidly spread throughout the space.
Tests prove that the average particle size range of the fine water mist generated by the acoustic low-pressure fine water mist nozzle 12 is 50-300 mu m, the specific surface area of the water mist is increased by millions, the water mist is instantly vaporized when encountering flames and absorbs heat to form steam, the temperature of a fire scene is reduced, a high-efficiency anoxic environment is formed, and the optimal fire extinguishing principle, namely cooling, suffocation and dust removal, is achieved.
Claims (2)
1. An acoustic low-pressure water mist fire extinguishing prevention and control device for a battery box of an energy storage power station is characterized by comprising a gas storage bottle group, a pressure reducing device, a water storage bottle group, a partition control valve, an acoustic low-pressure water mist fire extinguishing nozzle, a connecting pipeline and a pipe fitting; the composite detector, the driving module and the linkage controller are arranged on the base; the gas storage cylinder group is provided with a container valve group which can be automatically opened and closed and is connected with a pressure reducing device, the outlet of the pressure reducing device is divided into two paths, and one path of gas is connected with a gas interface of a water mist spray head arranged on the battery box through a first partition control valve; the other path of gas is connected to a water storage bottle group, and a liquid outlet of the water storage bottle group is connected with the other partition control valve II and is connected with a liquid inlet interface of the spray head; the composite detector is arranged in the battery box, is connected with the driving module outside the battery box, the first partition control valve and the second partition control valve and then is connected to the coupling controller; a canister valve block on the gas canister block is also coupled to the linkage controller.
2. The acoustic low-pressure water mist fire extinguishing prevention and control device for the battery box of the energy storage power station as claimed in claim 1, wherein the acoustic low-pressure water mist fire extinguishing nozzle comprises a bolt, a nut, a body, a cone, a resonance body, a shell and an upper cover, and the resonance body and the cone are connected together through the bolt; the cone and the body are connected into a whole by a nut; the upper end of the body is provided with a nozzle air inlet interface, and an elastic washer is arranged at the connection position of the nut in consideration of the impact effect of airflow; the shell is in threaded connection with the body, the upper cover is in threaded connection with the shell and the body, a gas diversion hole is formed in the inner wall of the body, and a horn-shaped cavity is formed between the body and the outer conical surface of the cone and communicated with the gas diversion hole; the water diversion slotted hole is arranged at the lower end of the body near the outer diameter, the water inlet ports of the nozzles are arranged on the side walls of the shell and the body, the water inlet ports are communicated with the water diversion slotted hole, the sealing rings for preventing water leakage are arranged at the gaps between the body and the shell at the upper and lower positions of the water inlet port holes, and the gap between the body and the resonance body forms a fine water mist spray outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282326.6U CN215995374U (en) | 2021-09-22 | 2021-09-22 | Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282326.6U CN215995374U (en) | 2021-09-22 | 2021-09-22 | Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station |
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| CN215995374U true CN215995374U (en) | 2022-03-11 |
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| CN202122282326.6U Active CN215995374U (en) | 2021-09-22 | 2021-09-22 | Acoustic low-pressure water mist fire extinguishing prevention and control device for battery box of energy storage power station |
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