Fire extinguishing system driven by compressed air

Abstract

The invention relates to a fire extinguishing system driven by compressed air, which is characterized by comprising an air compressor, a first-stage liquid fire extinguishing unit and a second-stage CAFS fire extinguishing unit, when fire extinguishing is carried out, a liquid fire extinguishing mode is started in advance, namely, the first-stage liquid fire extinguishing unit is driven by the air compressor to output chemicals and align at an ignition point to extinguish fire, and the second-stage liquid fire extinguishing unit is driven by the air compressor to output chemicals and align at the ignition point to extinguish fire. If the liquid level of the agent is lower than the lowest liquid level and the fire behavior is continuous, the CAFS fire extinguishing mode is started, and in the CAFS fire extinguishing mode, pure water is output for fire extinguishing through a second-stage CAFS fire extinguishing unit through switching between electric valves, or compressed air foam mixed liquid is output under driving of an air compressor to continuously extinguish the fire at the ignition point till fire extinguishing is successfully finished. According to the liquid fire extinguishing and compressed air foam fire extinguishing system driven by compressed air, the problem that liquid fire extinguishing is not continuous is effectively solved, lithium battery reburning is prevented, safe and stable operation of an energy storage battery bin system is guaranteed, and the fire fighting capacity of the energy storage battery bin system is improved.

Description

Technical Field

[0001] The present invention relates to a fire extinguishing system, in particular to a fire extinguishing system driven by compressed air, and belongs to the technical field of fire protection of power electronic equipment. Background Art

[0002] Currently, the battery compartments of power electronic equipment primarily use lithium batteries. If a lithium battery fire occurs within a battery compartment, it presents significant differences from ordinary fires. This is because lithium batteries, as energetic materials, burn intensely and spread heat rapidly; they are highly toxic, produce large amounts of smoke, and are highly dangerous; they easily reignite and are difficult to extinguish. However, existing fire extinguishing agents, such as dry powder fire extinguishing agents, are virtually ineffective against lithium battery fires. Current gas fire extinguishing methods, such as heptafluoropropane and perfluorohexanone, are ineffective against fires, often causing them to reignite later. Furthermore, existing compressed air foam fire extinguishing technology relies on fire pumps, which not only draw a high starting current but also consume a significant electrical load. Summary of the Invention

[0003] The purpose of the present invention is to provide a fire extinguishing system driven by compressed air, which is a liquid fire extinguishing and compressed air foam fire extinguishing system driven by compressed air, effectively avoiding the problem of discontinuity of liquid fire extinguishing, preventing lithium battery re-ignition, ensuring the safe and stable operation of the energy storage battery compartment system, and improving its fire fighting capability.

[0004] In order to achieve the above object, the technical solution of the present invention is: a fire extinguishing system driven by compressed air, the innovation of which is that it includes an air compressor K1, a first-level liquid fire extinguishing unit and a second-level CAFS fire extinguishing unit,

[0005] The first-level liquid fire extinguishing unit includes a reagent tank C04, a gas-liquid mixer C05, a third electric valve V03, a fifth electric valve V05 and a sixth electric valve V06. The air outlet of the air compressor K1 is connected to the air inlet of the reagent tank CO4 through a first air pipe, and the first air pipe is provided with a third electric valve V03. The air outlet of the air compressor K1 is also connected to the air inlet of the gas-liquid mixer C05 through a second air pipe, and the second air pipe is provided with a fifth electric valve V05. The sixth electric valve V06 is provided on the liquid infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05. The liquid outlet of the reagent tank C04 is connected to the liquid inlet pipeline of the gas-liquid mixer C05.

[0006] The secondary CAFS fire extinguishing unit includes a foam liquid branch, a fire water branch, a liquid-liquid mixer C03, and a fourth electric valve V04. The liquid outlets of the foam liquid branch and the fire water branch are respectively connected to the corresponding liquid inlet pipelines of the liquid-liquid mixer C03. The liquid outlet of the liquid-liquid mixer C03 is connected to the liquid inlet pipeline of the agent tank C04. The air outlet of the air compressor K1 is also connected to the liquid outlets of the foam liquid branch and the fire water branch through a third air pipe, and the fourth electric valve V04 is provided on the third air pipe.

[0007] When extinguishing a fire, the liquid fire extinguishing mode is activated in advance, that is, the third electric valve V03 and the sixth electric valve V06 of the first-level liquid fire extinguishing unit are opened, the air compressor K1 is started, and the agent in the agent tank C04 is output through the gas-liquid mixer C05 and aimed at the fire point to extinguish the fire.

[0008] If the agent in the agent tank C04 is lower than the minimum liquid level and the fire continues, the CAFS fire extinguishing mode is activated. In the CAFS fire extinguishing mode, the electric valves are switched so that only the fire water branch is output, thus realizing the pure water fire extinguishing mode.

[0009] Alternatively, the fourth electric valve V04 is opened, and under the action of the compressed air continuously output by the air compressor K1, the foam liquid branch and the fire water branch respectively output foam liquid and fire water to the liquid-liquid mixer C03 to form a foam mixture, and then send it to the gas-liquid mixer C05 through the agent tank C04. At the same time, the fifth electric valve V05 is opened, and the gas output by the air compressor K1 enters the gas-liquid mixer C05. At this time, under the mixing action of the foam mixture and the gas in the gas-liquid mixer C05, the compressed air-foam mixture is output to continuously extinguish the fire point until the fire is successfully extinguished.

[0010] In the above technical solution, a gas flow regulating branch is also provided on the first air circuit pipe connecting the air outlet of the air compressor K1 and the air inlet of the reagent tank CO4. The gas flow regulating branch includes a bypass branch, and the bypass branch is provided with three branch pipes in parallel. The first branch pipe is provided with a first automatic exhaust valve V11, the second branch pipe is provided with a fifth pressure transmitter PT05 and a seventh inspection ball valve V47 in series, and the third branch pipe is provided with a safety valve V14 and an eighth inspection ball valve V48 in series.

[0011] In the above technical solution, the medicine tank C04 is provided with a third liquid level gauge LIT03 for monitoring the highest and lowest liquid levels in the medicine tank C04 and connected to its pipeline. At the same time, the pipeline is provided with a fifth inspection ball valve V45 and a sixth inspection ball valve V46 connected in parallel.

[0012] In the above technical solution, a fifth liquid discharge valve V55 is further provided on the pipeline connecting the liquid outlet provided at the bottom of the medicine tank C04 and the liquid inlet of the gas-liquid mixer C05.

[0013] In the above technical solution, a third flowmeter FIT03 for monitoring the compressed air flow is also provided on the second air circuit pipe connecting the air outlet of the air compressor K1 and the air inlet of the gas-liquid mixer C05, and a fourth manual inspection valve V34 is also provided on the infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05.

[0014] In the above technical solution, the foam liquid branch includes a foam liquid tank C01 and a foam output pipe. The liquid outlet of the foam liquid tank C01 is connected to the liquid inlet corresponding to the liquid-liquid mixer C03 through the foam output pipe, and the foam output pipe is provided with a second pneumatic diaphragm pump P2, a second check valve V22, a first flowmeter FIT01 and a third pressure transmitter PT03. The second pneumatic diaphragm pump P2 is connected to the third air circuit pipe of the air outlet of the air compressor K1.

[0015] In the above technical solution, the foam liquid branch also includes a foam liquid standby conducting branch, which includes a foam liquid standby conducting pipe connected to the third air circuit pipe, and the foam liquid standby conducting pipe is provided with a first pressure transmitter PTO1, a first electric valve V01 and a seventh electric valve V07. The first pneumatic diaphragm pump P2 and the second pneumatic diaphragm pump P2 are connected to different outlets of the seventh electric valve V07, and the outlet of the first pneumatic diaphragm pump P2 is connected to the inlet of the first check valve V21, the outlet of the first check valve V21 is connected to the foam output pipe, and the connection point is located between the second check valve V22 and the first flowmeter FIT01.

[0016] In the above technical solution, a first manual inspection valve V31 and a third drain valve V53 are further provided on the foam output pipe.

[0017] In the above technical solution, the foam liquid tank C01 is provided with a liquid filling port, and a first liquid level gauge LIT01 connected to its pipeline for monitoring the highest and lowest levels of the foam liquid in the foam liquid tank C01. At the same time, the pipeline is provided with a first inspection ball valve V41 and a second inspection ball valve V42 connected in parallel. A first drain valve V51 is also provided at the bottom of the foam liquid tank C01.

[0018] In the above technical solution, the fire water branch includes a fire water tank C02 and a fire water output pipe. The water outlet of the fire water tank C02 is connected to the liquid inlet corresponding to the liquid-liquid mixer C03 through the fire water output pipe, and the fire water output pipe is provided with a third pneumatic diaphragm pump P3, a third check valve V23, a second flow meter FIT02 and a fourth pressure transmitter PT04. The third pneumatic diaphragm pump P3 is connected to the third air circuit pipe of the air outlet of the air compressor K1.

[0019] In the above technical solution, the fire water branch also includes a fire water standby conducting branch, which includes a fire water standby conducting pipe connected to the third air pipe, and the fire water standby conducting pipe is provided with a second pressure transmitter PTO2, a second electric valve V02 and an eighth electric valve V08 on the pipeline. The third pneumatic diaphragm pump P3 and the fourth pneumatic diaphragm pump P4 are connected to different outlets of the eighth electric valve V08, and the inlet of the fourth pneumatic diaphragm pump P4 is connected to the outlet pipeline of the fire water tank C02, and a third manual inspection valve V33 is provided on the pipeline, the outlet of the fourth pneumatic diaphragm pump P4 is connected to the inlet of the fourth check valve V24, the outlet of the fourth check valve V24 is connected to the fire water output pipe, and the connection point is located between the third check valve V23 and the second flow meter FIT02.

[0020] In the above technical solution, a second manual inspection valve V32 and a fourth drain valve V54 are further provided on the fire water output pipe.

[0021] In the above technical solution, the fire water tank C02 is provided with a water supply port, and a second liquid level gauge LIT03 for monitoring the highest and lowest levels of the fire water in the fire water tank C02 and connected to its pipeline. At the same time, the pipeline is provided with a third inspection ball valve V43 and a fourth inspection ball valve V44 connected in parallel, and a second drain valve V52 is also provided at the bottom of the fire water tank C02.

[0022] In the above technical solution, a second automatic exhaust valve V12 is further provided on the third air pipe.

[0023] The above technical solution further includes an air compressor K2 arranged in parallel with the air compressor K1, and the first air pipe, the second air pipe and the third air pipe are all connected to the air outlet of the air compressor K2.

[0024] The positive effects of the present invention are: after adopting the fire extinguishing system driven by compressed air, since it includes an air compressor K1, a first-level liquid fire extinguishing unit and a second-level CAFS fire extinguishing unit,

[0025] The first-level liquid fire extinguishing unit includes a reagent tank C04, a gas-liquid mixer C05, a third electric valve V03, a fifth electric valve V05 and a sixth electric valve V06. The air outlet of the air compressor K1 is connected to the air inlet of the reagent tank CO4 through a first air pipe, and the first air pipe is provided with a third electric valve V03. The air outlet of the air compressor K1 is also connected to the air inlet of the gas-liquid mixer C05 through a second air pipe, and the second air pipe is provided with a fifth electric valve V05. The sixth electric valve V06 is provided on the liquid infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05. The liquid outlet of the reagent tank C04 is connected to the liquid inlet pipeline of the gas-liquid mixer C05.

[0026] The secondary CAFS fire extinguishing unit includes a foam liquid branch, a fire water branch, a liquid-liquid mixer C03, and a fourth electric valve V04. The liquid outlets of the foam liquid branch and the fire water branch are respectively connected to the corresponding liquid inlet pipelines of the liquid-liquid mixer C03. The liquid outlet of the liquid-liquid mixer C03 is connected to the liquid inlet pipeline of the agent tank C04. The air outlet of the air compressor K1 is also connected to the liquid outlets of the foam liquid branch and the fire water branch through a third air pipe, and the fourth electric valve V04 is provided on the third air pipe.

[0027] When extinguishing a fire, the liquid fire extinguishing mode is activated in advance, that is, the third electric valve V03 and the sixth electric valve V06 of the first-level liquid fire extinguishing unit are opened, the air compressor K1 is started, and the agent in the agent tank C04 is output through the gas-liquid mixer C05 and aimed at the fire point to extinguish the fire.

[0028] If the agent in the agent tank C04 is lower than the minimum liquid level and the fire continues, the CAFS fire extinguishing mode is activated. In the CAFS fire extinguishing mode, the electric valves are switched so that only the fire water branch is output, thus realizing the pure water fire extinguishing mode.

[0029] Alternatively, the fourth electric valve V04 is opened, and under the action of the compressed air continuously output by the air compressor K1, the foam liquid branch and the fire water branch respectively output foam liquid and fire water to the liquid-liquid mixer C03 to form a foam mixture, which is then sent to the gas-liquid mixer C05 through the agent tank C04. At the same time, the fifth electric valve V05 is opened, and the gas output by the air compressor K1 enters the gas-liquid mixer C05. At this time, under the action of the mixing of the foam mixture and the gas in the gas-liquid mixer C05, the compressed air-foam mixture is output to the fire point to continuously extinguish the fire until the fire is successfully extinguished.

[0030] Therefore, the fire extinguishing system driven by compressed air of the present invention has the following beneficial effects:

[0031] (1) The present invention uses compressed air to first drive the liquid in the agent tank to extinguish the fire, avoiding the pressure inside the agent tank under normal conditions, and then drives the foam liquid and water to mix to form compressed air foam liquid to extinguish the fire. This can avoid the problem of unsustainable gas fire extinguishing, prevent the battery from reigniting, ensure the safe and stable operation of the energy storage battery cabin system, and improve its firefighting capability;

[0032] (2) The present invention utilizes compressed air to drive the foam liquid and water, and calibrates the flow rate by pressure, thereby avoiding the demand for large current required by the pump group, thereby further ensuring the safety and stability of the system operation.

[0033] (3) The present invention can realize the conversion between liquid fire extinguishing, pure water mode and compressed air foam mode by controlling the switching between different electric valves.

[0034] In summary, the present invention utilizes air drive, and does not require additional supporting facilities due to the large starting current of the water pump, thereby greatly saving the power distribution load. In addition, the present invention utilizes air to drive a variety of equipment and realizes a variety of fire extinguishing modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0036] Figure 2 It is the starting principle diagram of the present invention;

[0037] Figure 3 It is the fire extinguishing logic diagram of the present invention;

[0038] In the figure: foam liquid tank C01, fire water tank C02, liquid-liquid mixer C03, agent tank C04, gas-liquid mixer C05, the first to eighth electric valves V01-V08, the first to third flow meters FIT01-FIT03, the first to fifth pressure transmitters PT01-PT05, air compressors K1 and K2, the first to fourth pneumatic diaphragm pumps P1-P4, the first to fourth check valves V21-V24, the first to fourth manual inspection valves V31-V34, the first to eighth inspection ball valves V41-V48, the first to fifth drain valves V51-V55, the first to second automatic exhaust valves V11-V12, the first air line pipe 100, the second air line pipe 200, the third air line pipe 300, the foam output pipe 400, the foam liquid spare conduction pipe 500, the fire water output pipe 600, the fire water spare conduction pipe 700, DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and given embodiments, but the present invention is not limited thereto.

[0040] like Figure 1 、 2As shown in FIG3 , a fire extinguishing system driven by compressed air includes an air compressor K1, a first-level liquid fire extinguishing unit and a second-level CAFS fire extinguishing unit.

[0041] The primary liquid fire extinguishing unit includes a reagent tank C04, a gas-liquid mixer C05, a third electric valve V03, a fifth electric valve V05 and a sixth electric valve V06. The air outlet of the air compressor K1 is connected to the air inlet of the reagent tank CO4 through a first air pipe 100, and the first air pipe 100 is provided with a third electric valve V03. The air outlet of the air compressor K1 is also connected to the air inlet of the gas-liquid mixer C05 through a second air pipe 200, and the second air pipe 200 is provided with a fifth electric valve V05. The sixth electric valve V06 is provided on the liquid infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05. The liquid outlet of the reagent tank C04 is connected to the liquid inlet pipeline of the gas-liquid mixer C05.

[0042] The secondary CAFS fire extinguishing unit includes a foam liquid branch, a fire water branch, a liquid-liquid mixer C03, and a fourth electric valve V04. The liquid outlets of the foam liquid branch and the fire water branch are respectively connected to the corresponding liquid inlet pipelines of the liquid-liquid mixer C03. The liquid outlet of the liquid-liquid mixer C03 is connected to the liquid inlet pipeline of the agent tank C04. The air outlet of the air compressor K1 is also connected to the liquid outlets of the foam liquid branch and the fire water branch through a third air line 300. The fourth electric valve V04 is also installed on the third air line.

[0043] When extinguishing a fire, the liquid fire extinguishing mode is activated in advance, that is, the third electric valve V03 and the sixth electric valve V06 of the first-level liquid fire extinguishing unit are opened, the air compressor K1 is started, and the agent in the agent tank C04 is output through the gas-liquid mixer C05 and aimed at the fire point to extinguish the fire.

[0044] If the agent in the agent tank C04 is lower than the minimum liquid level and the fire continues, the CAFS fire extinguishing mode is activated. In the CAFS fire extinguishing mode, the electric valves are switched so that only the fire water branch is output, thus realizing the pure water fire extinguishing mode.

[0045] Alternatively, the fourth electric valve V04 is opened, and under the action of the compressed air continuously output by the air compressor K1, the foam liquid branch and the fire water branch respectively output foam liquid and fire water to the liquid-liquid mixer C03 to form a foam mixture, and then send it to the gas-liquid mixer C05 through the agent tank C04. At the same time, the fifth electric valve V05 is opened, and the gas output by the air compressor K1 enters the gas-liquid mixer C05. At this time, under the mixing action of the foam mixture and the gas in the gas-liquid mixer C05, the compressed air-foam mixture is output to continuously extinguish the fire point until the fire is successfully extinguished.

[0046] Further, such as Figure 1As shown, to facilitate adjustment of the flow rate of compressed air output by the air compressor and thus ensure stable air flow delivery, a gas flow regulation branch is also provided on the first air line pipe 100 connecting the air outlet of the air compressor K1 and the air inlet of the reagent tank CO4. The gas flow regulation branch includes a bypass branch, and the bypass branch is provided with three parallel branch pipes. The first branch pipe is provided with a first automatic exhaust valve V11, the second branch pipe is provided with a fifth pressure transmitter PT05 and a seventh inspection ball valve V47 connected in series, and the third branch pipe is provided with a safety valve V14 and an eighth inspection ball valve V48 connected in series. The compressed air pressure is monitored in real time by the fifth pressure transmitter. If the compressed air flow rate output by the air compressor exceeds the set requirement, the first automatic exhaust valve V11 and the safety valve V14 are used to release the compressed air and relieve the pressure. To facilitate maintenance of the gas flow regulation branch, a inspection ball valve is also provided on this branch.

[0047] Further, such as Figure 1 As shown, in order to facilitate the monitoring of the lowest liquid level in the agent tank and use it as a signal for whether to start the CAFS fire extinguishing mode, and to facilitate the maintenance of the liquid level gauge, the agent tank C04 is provided with a third liquid level gauge LIT03 for monitoring the highest and lowest liquid levels in the agent tank C04 and connected to its pipeline. At the same time, the pipeline is provided with a fifth inspection ball valve V45 and a sixth inspection ball valve V46 connected in parallel.

[0048] Further, such as Figure 1 As shown, in order to conveniently drain the agent in the agent tank so as to replace it with fresh agent and ensure the fire extinguishing performance of the agent, a fifth drain valve V55 is also provided on the pipeline connecting the liquid outlet at the bottom of the agent tank C04 and the liquid inlet of the gas-liquid mixer C05.

[0049] Furthermore, the CO4 outlet pipe of the chemical tank is connected to a gas-liquid mixer and an electric valve. Using compressed air as the driving source, the tank is unpressurized when there is no fire, thus avoiding the risk of leakage under pressure. In the event of a fire, the air compressor starts, the outlet electric valve opens, and the compressed air drives the chemical to extinguish the fire.

[0050] When the agent in the agent tank C04 is used up and CAFS fire extinguishing is carried out, the air compressor starts normally, and the compressed air is also used as the driving source to drive the pneumatic diaphragm pump, open the corresponding electric valve, and monitor the flow meter after the pump. The valve opening is used to control the driving pressure before the pump and thus control the delivery liquid flow. The system balances the flow according to the set foam mixture ratio.

[0051] Further, such as Figure 1As shown, in order to facilitate real-time monitoring of the flow of compressed gas entering the gas-liquid mixer, a third flowmeter FIT03 for monitoring the compressed air flow is provided on the second air circuit pipe connecting the air outlet of the air compressor K1 and the air inlet of the gas-liquid mixer C05. In order to facilitate the maintenance of the flowmeter, a fourth manual inspection valve V34 is also provided on the infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05.

[0052] Further, such as Figure 1 As shown, to enable precise and safe switching between different fire extinguishing modes, the foam liquid branch includes a foam liquid tank C01 and a foam output pipe 400. The liquid outlet of the foam liquid tank C01 is connected to the corresponding liquid inlet of the liquid-liquid mixer C03 via the foam output pipe 400. The foam output pipe 400 is also equipped with a second pneumatic diaphragm pump P2, a second check valve V22, a first flowmeter FIT01, and a third pressure transmitter PT03. The second pneumatic diaphragm pump P2 is connected to the third air line at the outlet of the air compressor K1. When CAFS fire extinguishing mode is activated, to ensure that the foam in the foam output pipe 400 enters the liquid-liquid mixer and prevents backflow, the flow rate and pressure can be monitored in real time to adjust the precise foam output.

[0053] Further, such as Figure 1 As shown, in order to ensure the stable operation of the fire extinguishing system, the foam liquid delivery pump group is one in use and one in standby, which are switched regularly to ensure that the system can continue to operate normally even during maintenance. The foam liquid branch also includes a foam liquid standby conducting branch, which includes a foam liquid standby conducting pipe 500 connected to the third air line pipe 300. The foam liquid standby conducting pipe 500 is provided with a first pressure transmitter PTO1, a first electric valve V01 and a seventh electric valve V07. Different outlets of the seventh electric valve V07 are connected to the first pneumatic diaphragm pump P2 and the second pneumatic diaphragm pump P2, and the outlet of the first pneumatic diaphragm pump P2 is connected to the inlet of the first check valve V21. The outlet of the first check valve V21 is connected to the foam output pipe 400, and the connection point is located between the second check valve V22 and the first flowmeter FIT01. The seventh electric valve V07 is used to switch the two pneumatic diaphragm pumps to a state of one in use and one in standby, and ensure that the foam liquid standby conduction branch does not flow back.

[0054] Further, such as Figure 1 As shown, in order to facilitate maintenance and drainage, the foam output pipe 400 is further provided with a first manual maintenance valve V31 and a third drainage valve V53.

[0055] Further, such as Figure 1As shown, in order to facilitate the detection of the amount of foam in the tank and to ensure timely replenishment of foam, the foam liquid tank C01 is provided with a liquid filling port and a first liquid level gauge LIT01 connected to its pipeline for monitoring the highest and lowest levels of the foam liquid in the foam liquid tank C01. At the same time, the pipeline is provided with a first inspection ball valve V41 and a second inspection ball valve V42 connected in parallel. In order to facilitate the discharge of all foam in the foam liquid tank, a first drain valve V51 is also provided at the bottom of the foam liquid tank C01.

[0056] Further, such as Figure 1 As shown, in order to achieve effective supply of fire water, the fire water branch includes a fire water tank C02 and a fire water output pipe 600. The water outlet of the fire water tank C02 is connected to the liquid inlet corresponding to the liquid-liquid mixer C03 through the fire water output pipe 600, and the fire water output pipe 600 is provided with a third pneumatic diaphragm pump P3, a third check valve V23, a second flow meter FIT02 and a fourth pressure transmitter PT04. The third pneumatic diaphragm pump P3 is connected to the third air circuit pipe 300 of the air outlet of the air compressor K1.

[0057] Further, such as Figure 1 As shown, in order to ensure the stable operation of the fire extinguishing system, the fire water delivery pump group is one in use and one in standby, and is switched regularly to ensure that the system can continue to operate normally even during maintenance. The fire water branch also includes a fire water standby conduction branch, which includes a fire water standby conduction pipe 700 connected to the third gas pipe 300. The fire water standby conduction pipe 700 is provided with a second pressure transmitter PTO2, a second electric valve V02 and an eighth electric valve V08. The third and fourth pneumatic diaphragm pumps P3 and P4 are connected to different outlets of the eighth electric valve V08. The inlet of the fourth pneumatic diaphragm pump P4 is connected to the outlet pipeline of the fire water tank C02, which is equipped with a third manual service valve V33. The outlet of the fourth pneumatic diaphragm pump P4 is connected to the inlet of a fourth check valve V24. The outlet of the fourth check valve V24 is connected to the fire water output pipe 600, and the connection point is located between the third check valve V23 and the second flowmeter FIT02. The eighth electric valve V08 switches the operation of the two pneumatic diaphragm pumps, keeping one in active and the other in standby mode, and prevents backflow of the foam liquid in the standby conduction branch.

[0058] Further, such as Figure 1 As shown, in order to facilitate the inspection and discharge of fire water, a second manual inspection valve V32 and a fourth drain valve V54 are further provided on the fire water output pipe 600.

[0059] Further, such as Figure 1As shown, in order to monitor the amount of fire water in real time and replenish it, the fire water tank C02 is provided with a water replenishment port, and a second liquid level gauge LIT03 for monitoring the highest and lowest levels of the fire water in the fire water tank C02 and connected to its pipeline. At the same time, the pipeline is provided with a third inspection ball valve V43 and a fourth inspection ball valve V44 connected in parallel. In order to facilitate the rapid discharge of fire water, a second drain valve V52 is also provided at the bottom of the fire water tank C02.

[0060] Further, such as Figure 1 As shown, in order to prevent the compressed air pressure in the third air pipe from being too high and to quickly achieve exhaust and pressure relief, the third air pipe 300 is further provided with a second automatic exhaust valve V12.

[0061] Further, such as Figure 1 As shown, in order to prevent the entire machine from stopping when the air compressor stops working, an air compressor K2 is also included in parallel with the air compressor K1, and the first air pipe 100, the second air pipe 200 and the third air pipe 300 are all connected to the air outlet of the air compressor K2.

[0062] like Figure 2 、 3 As shown, the working process of the present invention is:

[0063] When extinguishing a fire, the liquid fire extinguishing mode is activated in advance, that is, the third electric valve V03 and the sixth electric valve V06 of the first-level liquid fire extinguishing unit are opened, the air compressor K1 is started, and the agent in the agent tank C04 is output through the gas-liquid mixer C05 and aimed at the fire point to extinguish the fire.

[0064] If the agent in the agent tank C04 is lower than the minimum liquid level and the fire persists, the CAFS fire extinguishing mode is activated, that is, the fourth electric valve V04 is opened. Under the action of the compressed air continuously output by the air compressor K1, the foam liquid branch and the fire water branch respectively output foam liquid and fire water to the liquid-liquid mixer C03 to form a foam mixture, and then send it to the gas-liquid mixer C05 through the agent tank C04. At the same time, the fifth electric valve V05 is opened, and the gas output by the air compressor K1 enters the gas-liquid mixer C05. At this time, under the mixing action of the foam mixture and the gas in the liquid mixer C05, the compressed air-foam mixture is output to the fire point to continuously extinguish the fire until the fire is successfully extinguished.

[0065] The present invention combines gas fire extinguishing and compressed air fire extinguishing modes. In the fire extinguishing mode, the gas in the agent tank is first extinguished. When the liquid level in the agent tank is detected to be low, the CAFS fire extinguishing mode is turned on, the corresponding electric valve is opened, and compressed air foam is formed through the liquid-liquid mixer and the gas-liquid mixer, and transported through the pipeline for fire extinguishing.

[0066] Of course, in CAFS fire extinguishing mode, pure water fire extinguishing mode can be achieved by switching between electric valves to output only the fire water branch. Specifically, electric valves V01 and V05 are closed, and electric valves V02 and V06 are opened. The fire water output pipe 600 is driven by an air diaphragm pump, and water flows through the liquid-liquid mixer C03, the reagent tank C04, and the gas-liquid mixer C05, outputting pure water and flowing into the battery compartment.

[0067] Therefore, the present invention has the advantages that:

[0068] (1) The present invention uses compressed air to first drive the liquid in the agent tank to extinguish the fire, avoiding the pressure inside the agent tank under normal conditions, and then drives the foam liquid and water to mix to form compressed air foam liquid to extinguish the fire. This can avoid the problem of unsustainable gas fire extinguishing, prevent the battery from reigniting, ensure the safe and stable operation of the energy storage battery cabin system, and improve its firefighting capability;

[0069] (2) The present invention utilizes compressed air to drive the foam liquid and water, and calibrates the flow rate by pressure, thereby avoiding the demand for large current required by the pump group, thereby further ensuring the safety and stability of the system operation.

[0070] (3) The present invention can realize the conversion between liquid fire extinguishing, pure water mode and compressed air foam mode by controlling the switching between different electric valves.

[0071] In summary, the present invention utilizes air drive, and does not require additional supporting facilities due to the large starting current of the water pump, thereby greatly saving the power distribution load. In addition, the present invention utilizes air to drive a variety of equipment and realizes a variety of fire extinguishing modes.

[0072] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A fire extinguishing system driven by compressed air, characterized in that: Including air compressor K1, first-level liquid fire extinguishing unit and second-level CAFS fire extinguishing unit, The first-level liquid fire extinguishing unit includes a reagent tank C04, a gas-liquid mixer C05, a third electric valve V03, a fifth electric valve V05 and a sixth electric valve V06. The air outlet of the air compressor K1 is connected to the air inlet of the reagent tank CO4 through a first air pipe, and the first air pipe is provided with a third electric valve V03. The air outlet of the air compressor K1 is also connected to the air inlet of the gas-liquid mixer C05 through a second air pipe, and the second air pipe is provided with a fifth electric valve V05. The sixth electric valve V06 is provided on the liquid infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05. The liquid outlet of the reagent tank C04 is connected to the liquid inlet pipeline of the gas-liquid mixer C05. The secondary CAFS fire extinguishing unit includes a foam liquid branch, a fire water branch, a liquid-liquid mixer C03, and a fourth electric valve V04. The liquid outlets of the foam liquid branch and the fire water branch are respectively connected to the corresponding liquid inlet pipelines of the liquid-liquid mixer C03. The liquid outlet of the liquid-liquid mixer C03 is connected to the liquid inlet pipeline of the agent tank C04. The air outlet of the air compressor K1 is also connected to the liquid outlets of the foam liquid branch and the fire water branch through a third air pipe, and the fourth electric valve V04 is provided on the third air pipe. When extinguishing a fire, the liquid fire extinguishing mode is activated in advance, that is, the third electric valve V03 and the sixth electric valve V06 of the first-level liquid fire extinguishing unit are opened, the air compressor K1 is started, and the agent in the agent tank C04 is output through the gas-liquid mixer C05 and aimed at the fire point to extinguish the fire. If the agent in the agent tank C04 is lower than the minimum liquid level and the fire continues, the CAFS fire extinguishing mode is activated. In the CAFS fire extinguishing mode, the electric valves are switched so that only the fire water branch is output, thus realizing the pure water fire extinguishing mode. Alternatively, the fourth electric valve V04 is opened, and under the action of the compressed air continuously output by the air compressor K1, the foam liquid branch and the fire water branch respectively output foam liquid and fire water to the liquid-liquid mixer C03 to form a foam mixture, and then send it to the gas-liquid mixer C05 through the agent tank C04. At the same time, the fifth electric valve V05 is opened, and the gas output by the air compressor K1 enters the gas-liquid mixer C05. At this time, under the mixing action of the foam mixture and the gas in the gas-liquid mixer C05, the compressed air-foam mixture is output to continuously extinguish the fire point until the fire is successfully extinguished.

2. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: A gas flow regulating branch is also provided on the first air circuit pipe connecting the air outlet of the air compressor K1 and the air inlet of the medicine tank CO4. The gas flow regulating branch includes a bypass branch, and the bypass branch is provided with three branch pipes in parallel. The first branch pipe is provided with a first automatic exhaust valve V11, the second branch pipe is provided with a fifth pressure transmitter PT05 and a seventh inspection ball valve V47 in series, and the third branch pipe is provided with a safety valve V14 and an eighth inspection ball valve V48 in series.

3. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: The medicine tank C04 is provided with a third liquid level gauge LIT03 connected to its pipeline for monitoring the highest and lowest liquid levels in the medicine tank C04. At the same time, the pipeline is provided with a fifth inspection ball valve V45 and a sixth inspection ball valve V46 connected in parallel.

4. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: A fifth liquid discharge valve V55 is also provided on the pipeline connecting the liquid outlet provided at the bottom of the medicine tank C04 and the liquid inlet of the gas-liquid mixer C05.

5. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: A third flowmeter FIT03 for monitoring the compressed air flow is also provided on the second air circuit pipe connecting the air outlet of the air compressor K1 and the air inlet of the gas-liquid mixer C05. A fourth manual inspection valve V34 is also provided on the liquid infusion pipeline connected to the liquid outlet of the gas-liquid mixer C05.

6. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: The foam liquid branch includes a foam liquid tank C01 and a foam output pipe. The liquid outlet of the foam liquid tank C01 is connected to the corresponding liquid inlet of the liquid-liquid mixer C03 through the foam output pipe, and a second pneumatic diaphragm pump P2, a second check valve V22, a first flowmeter FIT01 and a third pressure transmitter PT03 are provided on the foam output pipe. The second pneumatic diaphragm pump P2 is connected to the third air circuit pipe of the air outlet of the air compressor K1.

7. The fire extinguishing system driven by compressed air according to claim 6, characterized in that: The foam liquid branch also includes a foam liquid standby conducting branch, which includes a foam liquid standby conducting pipe connected to the third air circuit pipe, and the foam liquid standby conducting pipe is provided with a first pressure transmitter PTO1, a first electric valve V01 and a seventh electric valve V07. The first pneumatic diaphragm pump P2 and the second pneumatic diaphragm pump P2 are connected to different outlets of the seventh electric valve V07, and the outlet of the first pneumatic diaphragm pump P2 is connected to the inlet of the first check valve V21, the outlet of the first check valve V21 is connected to the foam output pipe, and the connection point is located between the second check valve V22 and the first flowmeter FIT01.

8. The fire extinguishing system driven by compressed air according to claim 6, characterized in that: The foam output pipe is also provided with a first manual inspection valve V31 and a third drain valve V53.

9. The fire extinguishing system driven by compressed air according to claim 6, characterized in that: The foam liquid tank C01 is provided with a liquid filling port and a first liquid level gauge LIT01 connected to its pipeline for monitoring the highest and lowest levels of the foam liquid in the foam liquid tank C01. At the same time, the pipeline is provided with a first inspection ball valve V41 and a second inspection ball valve V42 connected in parallel. A first drain valve V51 is also provided at the bottom of the foam liquid tank C01.

10. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: The fire water branch includes a fire water tank C02 and a fire water output pipe. The water outlet of the fire water tank C02 is connected to the liquid inlet corresponding to the liquid-liquid mixer C03 through the fire water output pipe, and the fire water output pipe is provided with a third pneumatic diaphragm pump P3, a third check valve V23, a second flowmeter FIT02 and a fourth pressure transmitter PT04. The third pneumatic diaphragm pump P3 is connected to the third air circuit pipe of the air outlet of the air compressor K1.

11. The fire extinguishing system driven by compressed air according to claim 10, characterized in that: The fire water branch also includes a fire water standby conducting branch, which includes a fire water standby conducting pipe connected to the third air pipe, and the fire water standby conducting pipe is provided with a second pressure transmitter PTO2, a second electric valve V02 and an eighth electric valve V08. The third pneumatic diaphragm pump P3 and a fourth pneumatic diaphragm pump P4 are connected to different outlets of the eighth electric valve V08, and the inlet of the fourth pneumatic diaphragm pump P4 is connected to the outlet pipeline of the fire water tank C02, and a third manual inspection valve V33 is provided on the pipeline, the outlet of the fourth pneumatic diaphragm pump P4 is connected to the inlet of the fourth check valve V24, the outlet of the fourth check valve V24 is connected to the fire water output pipe, and the connection point is located between the third check valve V23 and the second flow meter FIT02.

12. The fire extinguishing system driven by compressed air according to claim 10, characterized in that: The fire water output pipe is also provided with a second manual inspection valve V32 and a fourth drain valve V54.

13. The fire extinguishing system driven by compressed air according to claim 10, characterized in that: The fire water tank C02 is provided with a water replenishment port, and a second liquid level gauge LIT03 connected to its pipeline for monitoring the highest and lowest levels of the fire water in the fire water tank C02. At the same time, the pipeline is provided with a third inspection ball valve V43 and a fourth inspection ball valve V44 connected in parallel. The bottom of the fire water tank C02 is also provided with a second drain valve V52.

14. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: The third gas pipe is also provided with a second automatic exhaust valve V12.

15. The fire extinguishing system driven by compressed air according to claim 1, characterized in that: It also includes an air compressor K2 arranged in parallel with the air compressor K1, and the first air pipe, the second air pipe and the third air pipe are all connected to the air outlet of the air compressor K2.

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