Water-based fire extinguishing device

Abstract

The utility model discloses a water-based fire extinguishing device which comprises a liquid storage tank, a driving mechanism, a gas storage tank, a pump set and a foam generating device, an overturning partition plate is arranged in the liquid storage tank, the overturning partition plate divides the liquid storage tank into a medicament cavity and a water cavity, a medicament inlet and a water inlet are respectively arranged on the liquid storage tank, the medicament inlet is communicated with the medicament cavity, the water inlet is communicated with the water cavity, and the foam generating device is arranged on the driving mechanism. The driving mechanism can enable the overturning partition plate to rotate around the center axis of the overturning partition plate, a stirring mechanism is further arranged in the liquid storage tank, a liquid outlet is further formed in the liquid storage tank and used for discharging mixed liquid of chemicals and water out of the liquid storage tank, the liquid outlet is connected with the pump set, the pump set and the gas storage tank are connected with the foam generating device, and inert gas is stored in the gas storage tank. The device has the advantages that a non-pressure-storage structure is adopted, the size of the liquid storage tank can be set according to needs, chemicals and water are stored separately, and the storage life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing, in particular to a water-based fire extinguishing device. Background Art

[0002] Water-based fire extinguishers are non-toxic, harmless and pollution-free fire extinguishers. The main ingredients of the agent are surfactants and other substances mixed with treated pure water. It has the advantages of good fire extinguishing effect, environmental protection, harmlessness and easy use.

[0003] Lithium-ion batteries are commonly used energy storage units, especially in energy storage power stations. Several energy storage containers are usually set up in energy storage power stations, and several battery clusters are set up in each energy storage container. The battery cluster consists of several battery packs. The internal space of the energy storage container is small and tightly arranged. Once the lithium-ion battery has thermal runaway, it is very easy to cause a fire. Moreover, lithium-ion battery fires have the characteristics of fast ignition speed, high combustion temperature, and easy re-ignition. If the thermal runaway caused by the battery is not contained in time, it will cause serious accidents such as fire and explosion in the energy storage power station. It can be seen that the storage capacity of the fire extinguisher and the storage life of the fire extinguisher are important considerations for the selection of fire extinguishing devices in energy storage power stations. However, most of the current water-based fire extinguishers are small portable structures with limited storage capacity of the agent, which cannot meet the demand for fire extinguishing agents for lithium-ion battery fires. Moreover, most of the current water-based fire extinguishers are pressure storage fire extinguishers, which will cause pressure leakage during storage, resulting in insufficient starting pressure and the inability to start the fire extinguisher. In addition, the mixture of the agent and water in the water-based fire extinguisher will also produce chemical reactions due to long-term storage and lose its effect. Therefore, there is an urgent need for a water-based fire extinguishing device suitable for lithium-ion battery fires. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a water-based fire extinguishing device which adopts a non-pressure storage structure, can set the size of the liquid storage tank according to needs, stores the agent and water separately, and has a long storage life.

[0005] The purpose of the utility model is achieved through the following technical measures: a water-based fire extinguishing device, comprising a liquid storage tank, a driving mechanism, a gas storage tank, a pump group and a foam generating device, wherein a flip partition is provided in the liquid storage tank, and the flip partition separates the liquid storage tank into a medicine chamber and a water chamber, and a medicine inlet and a water inlet are respectively provided on the liquid storage tank, and the medicine inlet is communicated with the medicine chamber, and the water inlet is communicated with the water chamber, and the driving mechanism can rotate the flip partition around the central axis of the flip partition, and a stirring mechanism is also provided in the liquid storage tank, and a liquid outlet is also provided on the liquid storage tank, and the liquid outlet is used to discharge the mixture of medicine and water out of the liquid storage tank, and the liquid outlet is connected to the pump group, and the pump group and the gas storage tank are respectively connected to the foam generating device, and inert gas is stored in the gas storage tank.

[0006] Furthermore, the stirring mechanism includes a stirring motor, a stirring shaft and stirring fins. The stirring motor is arranged outside the liquid storage tank, the stirring motor is connected to one end of the stirring shaft, the other end of the stirring shaft extends into the liquid storage tank, and the stirring fins are arranged on the stirring shaft and located in the liquid storage tank.

[0007] Furthermore, a flow meter is provided between the pump group and the foam generating device.

[0008] Furthermore, a needle valve is provided between the gas storage tank and the foam generating device.

[0009] Furthermore, a pressure transmitter is provided at the outlet end of the needle valve.

[0010] Furthermore, a pressure reducing valve is provided at the inlet end of the needle valve.

[0011] Furthermore, the water-based fire extinguishing device also includes a control mechanism, and the control mechanism is used to control the water-based fire extinguishing device.

[0012] Furthermore, a sealing ring is provided on the circumferential side surface of the flip partition.

[0013] Furthermore, the rotation angle θ of the flip baffle is 0°<θ≤90°.

[0014] Furthermore, a balancing valve is also provided on the liquid storage tank.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the application adopts a non-pressure storage structure and a pump group to realize the transportation of the mixed liquid, which can increase the storage life of the fire extinguishing device, and at the same time, there is no need to consider the restrictions of the opening pressure and the pressure bearing capacity of the liquid storage tank on the fire extinguishing device, and the size of the liquid storage tank can be set according to needs. Moreover, the agent and water of the application are stored separately, which can avoid the oxidation of the agent by dissolved oxygen in the water during storage, and further extend the storage life of the fire extinguishing device. In addition, the application can fill the agent and water through the agent inlet and the water inlet, realize the reuse of the fire extinguishing device, facilitate filling, and reduce the cost of the device. When filling the agent and water, the filling ratio of the agent to water can be selected according to needs to improve the applicability of the fire extinguishing device.

[0016] The utility model is described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Among them, 1. liquid storage tank, 2. flip partition, 3. medicine chamber, 4. water chamber, 5. medicine inlet, 6. water inlet, 7. liquid outlet, 8. gas storage tank, 9. pump group, 10. foam generating device, 11. stirring motor, 12. stirring shaft, 13. stirring fins, 14. flow meter, 15. needle valve, 16. pressure reducing valve, 17. pressure transmitter, 18. drive motor, 19. balance valve, 20. shell. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, a water-based fire extinguishing device includes a liquid storage tank 1, a driving mechanism, a gas storage tank 8, a pump group 9 and a foam generating device 10. The liquid storage tank 1 is provided with a flip partition 2, and the flip partition 2 separates the liquid storage tank 1 into a reagent chamber 3 and a water chamber 4. The reagent chamber 3 is used to store the fire extinguishing agent stock liquid, and the fire extinguishing agent stock liquid includes one or more of F-500 or Fireice fire extinguishing agent, and the water chamber 4 is used to store deionized water. Further, the flip partition 2 can separate the liquid storage tank 1 up and down or left and right, preferably up and down. Further, when the up and down separation is performed, preferably, the reagent chamber 3 is located above the water chamber 4. The liquid storage tank 1 is provided with a reagent inlet 5 and a water inlet 6, respectively, the reagent inlet 5 is connected to the reagent chamber 3, and the water inlet 6 is connected to the water chamber 4. The driving mechanism can rotate the flip partition 2 around the central axis of the flip partition 2, and the central axis is parallel to the flip partition 2. Specifically, the driving mechanism can be a driving motor 18. In the initial state, that is, when the flip baffle 2 is perpendicular to the wall of the liquid storage tank 1, the flip baffle 2 can achieve the sealing of the medicine chamber 3 and the water chamber 4. When the flip baffle 2 rotates, the flip baffle 2 is inclined relative to the wall of the liquid storage tank 1, and a gap is generated between the flip baffle 2 and the wall of the liquid storage tank 1. The medicine chamber 3 is connected to the water chamber 4, and the medicine in the medicine chamber 3 can flow into the water chamber 4 to achieve the mixing of the medicine and water. The liquid storage tank 1 is also provided with a stirring mechanism. When the medicine is mixed with water, the stirring device is used to mix the medicine and water. The liquid storage tank 1 is also provided with a liquid outlet 7, and the liquid outlet 7 is used to discharge the mixed liquid of the medicine and water from the liquid storage tank 1. Specifically, the liquid outlet 7 is located at the lower part or bottom of the liquid storage tank 1. The liquid outlet 7 is connected to the pump group 9, and the pump group 9 and the gas storage tank 8 are respectively connected to the foam generating device 10. The gas storage tank 8 stores an inert gas, and the inert gas is one or more of nitrogen and carbon dioxide. Inert gases can work together with water-based fire extinguishing agents to extinguish fires. On the one hand, they form an inert environment and cut off oxygen combustion aids. On the other hand, water-based fire extinguishing agents can improve fire extinguishing performance by capturing and encapsulating battery thermal runaway alkane fuels to form microcapsules, reduce their flammability and carry them away from the fire zone, thereby inhibiting the free radical chain reaction in the flame.

[0020] The stirring mechanism includes a stirring motor 11, a stirring shaft 12 and stirring fins 13. The stirring motor 11 is arranged outside the liquid storage tank 1. The stirring motor 11 is connected to one end of the stirring shaft 12. The other end of the stirring shaft 12 extends through the liquid storage tank 1. The stirring fins 13 are arranged on the stirring shaft 12 and are located in the liquid storage tank 1. Further, the stirring motor 11 is located below the liquid storage tank 1. The stirring fins 13 are located in the medicine chamber 3 or the water chamber 4. When the medicine is mixed with water, the stirring mechanism can achieve rapid and uniform mixing of the medicine and water to form a uniform mixed liquid.

[0021] A flow meter 14 is also provided between the pump group 9 and the foam generating device 10. The flow rate of the mixed liquid entering the foam generating device 10 can be controlled by the flow meter 14. A needle valve 15 is also provided between the gas storage tank 8 and the foam generating device 10. The needle valve 15 controls the flow rate of the gas in the gas storage tank 8 entering the foam generating device 10, and then the foaming ratio can be adjusted by controlling the flow meter 14 and the needle valve 15, and the foaming ratio can be adjusted as needed.

[0022] The outlet end of the needle valve 15 is also provided with a pressure transmitter 17 , through which the gas pressure can be monitored in real time.

[0023] The inlet end of the needle valve 15 is also provided with a pressure reducing valve 16 , through which the outlet air pressure of the air storage tank 8 is reduced to protect the needle valve 15 and the pressure transmitter 17 .

[0024] The water-based fire extinguishing device also includes a control mechanism, which is used to control the water-based fire extinguishing device. Specifically, the control mechanism can be used to control the start and stop of the driving mechanism, the pump group 9 and the stirring device, and to adjust the flow meter 14 and the needle valve 15, and can also receive the pressure signal of the pressure transmitter 17.

[0025] A sealing ring is provided on the circumferential side surface of the flip baffle 2. When the flip baffle 2 is perpendicular to the wall surface of the liquid storage tank 1, the sealing ring increases the sealing performance between the flip baffle 2 and the wall surface of the liquid storage tank 1.

[0026] The rotation angle θ of the flip baffle 2 is 0°<θ≤90°.

[0027] The liquid storage tank 1 is also provided with a balancing valve 19. When the mixture of the medicine and water is discharged through the liquid outlet 7, the balancing valve 19 is used to balance the internal pressure of the liquid storage tank 1 to facilitate the discharge of the mixture.

[0028] The fire extinguishing device further comprises a housing 20 , which is used to accommodate a liquid storage tank 1 , a driving mechanism, an air storage tank 8 , a pump group 9 , a stirring mechanism, a foam generating device 10 , a flow meter 14 , a pressure reducing valve 16 , a needle valve 15 and a pressure transmitter 17 .

[0029] In the present application, when the battery has a thermal runaway fire, the driving mechanism and the stirring mechanism can be started at the same time, and the driving mechanism starts the rotation of the flip partition 2, the agent is mixed with water, and a uniform mixed liquid is formed under the stirring action of the stirring mechanism. After starting the driving mechanism and the stirring mechanism, a delay of a period of time can be made, and then the liquid outlet 7, the pump group 9, the pressure reducing valve 16 and the needle valve 15 are opened, and the mixed liquid and the inert gas enter the foam generating device 10 for foaming to form a water-based fire extinguishing agent, which can be transported to the fire location through the fire extinguishing agent delivery pipeline for fire extinguishing.

[0030] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0031] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water-based fire extinguishing device, characterized in that: The invention comprises a liquid storage tank, a driving mechanism, an air storage tank, a pump group and a foam generating device. The liquid storage tank is provided with a flip partition, and the flip partition separates the liquid storage tank into a medicine chamber and a water chamber. The liquid storage tank is provided with a medicine inlet and a water inlet respectively, and the medicine inlet is connected with the medicine chamber, and the water inlet is connected with the water chamber. The driving mechanism can rotate the flip partition around the central axis of the flip partition. The liquid storage tank is also provided with a stirring mechanism, and the liquid storage tank is also provided with a liquid outlet, and the liquid outlet is used to discharge the mixture of medicine and water out of the liquid storage tank. The liquid outlet is connected with the pump group, and the pump group and the air storage tank are respectively connected with the foam generating device. Inert gas is stored in the air storage tank.

2. The water-based fire extinguishing device according to claim 1, characterized in that: The stirring mechanism includes a stirring motor, a stirring shaft and stirring fins. The stirring motor is arranged outside the liquid storage tank. The stirring motor is connected to one end of the stirring shaft. The other end of the stirring shaft extends into the liquid storage tank. The stirring fins are arranged on the stirring shaft and located in the liquid storage tank.

3. The water-based fire extinguishing device according to claim 1, characterized in that: A flow meter is also provided between the pump group and the foam generating device.

4. The water-based fire extinguishing device according to claim 1, characterized in that: A needle valve is also provided between the gas storage tank and the foam generating device.

5. The water-based fire extinguishing device according to claim 4, characterized in that: The outlet end of the needle valve is also provided with a pressure transmitter.

6. The water-based fire extinguishing device according to claim 4, characterized in that: The inlet end of the needle valve is also provided with a pressure reducing valve.

7. The water-based fire extinguishing device according to claim 1, characterized in that: The water-based fire extinguishing device further comprises a control mechanism, and the control mechanism is used to control the water-based fire extinguishing device.

8. The water-based fire extinguishing device according to claim 1, characterized in that: A sealing ring is arranged on the circumferential side surface of the flip partition.

9. The water-based fire extinguishing device according to claim 1, characterized in that: The rotation angle θ of the flip partition is 0°<θ≤90°.

10. The water-based fire extinguishing device according to claim 1, characterized in that: The liquid storage tank is also provided with a balancing valve.

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