Fire extinguishing system and fire extinguishing operation method

Abstract

The invention relates to the technical field of fire fighting equipment, and discloses a fire extinguishing system and a fire extinguishing operation method. The fire extinguishing system comprises a mixing subsystem, a hydraulic drive subsystem, a gas circuit drive subsystem and a fire extinguishing agent supply subsystem. A hydraulic driving device in the hydraulic driving subsystem converts hydraulic potential energy into mechanical energy and drives an air compressor in the gas path driving subsystem to work, and on one hand, the gas path driving subsystem supplies compressed gas to a gas supply connector of a mixing device through a first gas path supply module; on the other hand, compressed gas for driving is provided for a feeding pump set in the fire extinguishing agent supply subsystem through a second gas path supply module, so that the feeding pump set is driven to supply the fire extinguishing agent to a feeding connector of a mixing device, and finally water and the fire extinguishing agent are mixed in the same mixing chamber of the mixing device and then are further mixed with the compressed air; therefore, the mixing effect is improved. The fire extinguishing system disclosed by the invention is convenient to carry, is not limited by sites, is larger in operation range and is more environment-friendly.

Description

Technical Field

[0001] The present application belongs to the technical field of fire fighting equipment, and specifically relates to a fire extinguishing system and a fire extinguishing operation method. Background Art

[0002] The compressed air fire extinguishing system has the remarkable characteristics of fast fire extinguishing speed, small water consumption at the fire scene, strong foam stability, environmental protection and pollution-free, heat insulation and radiation protection, and prevention of re-ignition.

[0003] The main power source of the existing compressed air fire extinguishing system relies on gasoline engines, which makes the entire compressed air fire extinguishing system large in size and heavy in weight. It needs to be fixed on a fire truck or fixed in a specific area for use. It cannot be carried into different fire extinguishing areas, resulting in a limited fire extinguishing range. At the same time, the operation of the gasoline engine will also cause environmental pollution problems. Summary of the invention

[0004] The purpose of this application is to provide a fire extinguishing system and a fire extinguishing operation method, which are used to solve the problem that the existing fire extinguishing system is large in size and weight and needs to be used in a fixed area, and cannot be carried into different fire extinguishing areas, resulting in a limited fire extinguishing range and polluting the environment.

[0005] In order to achieve the above-mentioned object, the first aspect of the present application provides a fire extinguishing system, comprising:

[0006] A mixing subsystem, comprising a mixing device for mixing fire extinguishing agents, a liquid inlet pipe for connecting to an external water supply system, and a liquid outlet pipe for connecting to a fire extinguishing gun, wherein the mixing device is provided with a mixing chamber and a material supply interface and a gas supply interface connected to the mixing chamber along the water flow direction;

[0007] A hydraulic drive subsystem, which is used to connect to the water supply system and includes a hydraulic drive device for converting hydraulic potential energy into mechanical energy;

[0008] The air circuit driving subsystem comprises an air compressor and an air distribution device, wherein the air compressor is drivingly connected to the hydraulic driving device, the air distribution device is connected to the air outlet of the air compressor, and the air distribution device is connected to the air supply interface via a first air circuit supply module;

[0009] The fire extinguishing agent supply subsystem includes a feed pump group, wherein the feed pump group is connected to the gas distribution device through a second gas supply module, and the gas distribution device drives the feed pump group to work through airflow;

[0010] Wherein, the feed end of the feed pump group is used for connecting to an external fire extinguishing agent storage container, and the discharge end of the feed pump group is connected to the feed interface.

[0011] As a further improvement of the above technical solution:

[0012] In some embodiments, the fire extinguishing system further includes a gas circuit control subsystem, and the gas circuit control subsystem includes:

[0013] An air path control module, connected to the first air path supply module and the second air path supply module respectively through a control air pipe, and used for controlling the on and off of the air flow supply in the first air path supply module and the second air path supply module through air flow;

[0014] The third gas supply module has one end connected to the gas distribution device and the other end connected to the gas control module, and is used to deliver a gas flow for control to the gas control module.

[0015] In some embodiments, along the air flow delivery direction in the third air supply module, the third air supply module includes a first one-way valve and a spare air storage container which are sequentially connected by pipelines;

[0016] Wherein, the cut-off direction of the first one-way valve is opposite to the air flow conveying direction in the third air supply module.

[0017] In some embodiments, along the water flow conveying direction in the mixing subsystem, the mixing subsystem further comprises a first stop valve and a pipeline adapter device arranged downstream of the mixing device;

[0018] The pipeline adapter is arranged between the first stop valve and the mixing device, and a flow-turbulating column cavity is arranged in the pipeline adapter;

[0019] Wherein, the first stop valve is connected to the air circuit control module via a control air pipe so as to be controlled by the air flow in the air circuit control module.

[0020] In some embodiments, along the air flow delivery direction in the first air supply module, the first air supply module includes an air volume regulating mechanism, a second stop valve and a second one-way valve connected in sequence by pipelines;

[0021] The second stop valve is connected to the air circuit control module via a control air pipe so as to be on and off controlled by the air flow in the air circuit control module, and the stop direction of the second one-way valve is opposite to the air flow delivery direction in the first air circuit supply module.

[0022] In some embodiments, the second gas supply module includes a third stop valve, and the third stop valve is arranged between the gas distribution device and the feed pump group;

[0023] Wherein, the third stop valve is connected to the air circuit control module via a control air pipe so as to be on and off controlled by the air flow in the air circuit control module.

[0024] In some embodiments, the fire extinguishing agent supply subsystem further comprises a fourth shut-off valve and a pipeline discharge device connected in sequence through a discharge pipeline, the discharge pipeline is connected to a feed delivery pipeline in the fire extinguishing agent supply subsystem, and the pipeline discharge device is located at the end of the discharge pipeline;

[0025] Wherein, the fourth stop valve is connected to the air circuit control module via a control air pipe so as to be on and off controlled by the air flow in the air circuit control module.

[0026] In some embodiments, the fire extinguishing agent supply subsystem further includes a backup storage container for storing the fire extinguishing agent, wherein the backup storage container is disposed on the feed delivery pipeline, or the backup storage container is disposed on the discharge pipeline and upstream of the fourth shut-off valve.

[0027] In some embodiments, the fire extinguishing agent supply subsystem further includes a third one-way valve, a mixing ratio regulator, and a fourth one-way valve which are sequentially connected along the fire extinguishing agent delivery direction through a feed delivery pipeline, the third one-way valve is connected to the outlet end of the feed pump group, and the outlet end of the fourth one-way valve is connected to the mixing device;

[0028] Wherein, the cut-off direction of the third one-way valve and the fourth one-way valve is opposite to the fire extinguishing agent conveying direction.

[0029] In some embodiments, the air circuit drive subsystem also includes a heat exchanger, the primary side of the heat exchanger is connected to the lubricating oil circulation pipeline of the air compressor, and the secondary side of the heat exchanger is connected to the water outlet of the hydraulic drive device through a heat dissipation pipeline.

[0030] In some embodiments, the mixing subsystem further comprises a mixing flow regulating device connected to the mixing device, and along the water flow conveying direction in the mixing subsystem, the mixing flow regulating device is arranged upstream of the mixing device and is controlled and regulated by the air flow;

[0031] Wherein, the fire extinguishing system further includes an air circuit control subsystem, the mixed flow regulating device has a pneumatic actuator, and the pneumatic actuator is connected to the air circuit control module in the air circuit control subsystem via a control air pipe.

[0032] In some embodiments, along the water flow conveying direction in the hydraulic drive subsystem, the hydraulic drive subsystem further comprises a driving flow regulating device arranged upstream of the hydraulic drive device, the driving flow regulating device being used to regulate the water inlet flow size of the hydraulic drive device;

[0033] The water inlet end of the driving flow regulating device is used to be externally connected to the water supply system, and the water outlet end of the hydraulic driving device returns to the water supply system through a return pipe.

[0034] In some embodiments, the air circuit driving subsystem further includes an air outlet regulating device, which is disposed between the air compressor and the air volume distribution device and is used to regulate the air intake volume of the air volume distribution device.

[0035] A second aspect of the present application provides a fire extinguishing operation method applicable to a fire extinguishing system, which is applied to the fire extinguishing system provided according to the first aspect above, and the fire extinguishing operation method comprises:

[0036] S100: Connect the mixing subsystem and the hydraulic drive subsystem to the water supply system, and install a fire extinguisher;

[0037] S200: Install the fire extinguishing agent storage container and empty the fire extinguishing agent supply subsystem;

[0038] S300: starting the external water supply system to supply water and ensuring that the outlet of the mixing subsystem connected to the fire extinguisher remains closed, so that all the water flow is used to drive the hydraulic drive device, and then the hydraulic drive device drives the air compressor to prepare compressed air;

[0039] S400: When the amount of compressed air prepared reaches a preset requirement, the fire extinguishing gun is activated to start the fire extinguishing operation;

[0040] The water supply pressure of the water supply system is P, and satisfies: 0.6MPa≤P≤0.8MPa.

[0041] Compared with the prior art, the present application provides a fire extinguishing system and a fire extinguishing operation method, wherein the fire extinguishing system includes a hydraulic drive system, and the hydraulic drive device in the hydraulic drive subsystem can directly convert hydraulic potential energy into mechanical energy and drive the air compressor in the gas circuit drive subsystem to work, thereby, the gas circuit drive subsystem supplies compressed gas to the gas supply interface of the mixing device through the first gas circuit supply module on the one hand, and on the other hand, the second gas circuit supply module provides the compressed gas for driving to the feed pump group in the fire extinguishing agent supply subsystem to drive the feed pump group to supply the fire extinguishing agent to the feed interface of the mixing device, and finally, in the same mixing chamber of the mixing device, water and fire extinguishing agent are first mixed and then further mixed with compressed air, thereby improving the mixing effect. In this way, the power source required for the fire extinguishing system provided by the present application is an external water supply system, and there is no need to configure a large engine for power supply, thereby the overall volume and weight are smaller, so it is easy to carry into different fire extinguishing areas, and it is not restricted by the site. The use range of fire extinguishing operations is greatly improved, and the hydraulic drive is more environmentally friendly.

[0042] Furthermore, the mixing of water, fire extinguishing agent and compressed air is completed in the same mixing chamber, and there is no need to configure two mixing devices separately, which saves one mixing device, makes the structure of the fire extinguishing system more compact, further reduces the volume and weight, and improves portability.

[0043] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0045] Figure 1 A schematic diagram of a pipe system of a fire extinguishing system provided in an embodiment of the present application;

[0046] Figure 2 for Figure 1 The fire extinguishing system shown hides the partial structural diagram of the hydraulic drive subsystem and the gas drive subsystem;

[0047] Figure 3 A schematic diagram of a structure in which a fire extinguishing system provided in an embodiment of the present application is integrated into a chassis;

[0048] Figure 4 A schematic diagram of the three-dimensional structure of the mixing device and the pipeline adapter device of the mixing subsystem in the fire extinguishing system provided in an embodiment of the present application after assembly;

[0049] Figure 5 for Figure 4 A cross-sectional view of the mixing device and the pipeline adapter after assembly.

[0050] Description of Reference Numerals

[0051] 100, mixing subsystem; 110, mixing device; 111, mixing chamber; 112, material supply interface; 113, air supply interface; 120, liquid inlet pipe; 130, liquid outlet pipe; 140, first stop valve; 150, pipeline adapter; 151, flow-disturbing column chamber; 160, mixing flow regulating device; 161, pneumatic actuator; 170, fifth one-way valve;

[0052] 200, hydraulic drive subsystem; 210, hydraulic drive device; 211, coupling mechanism; 220, drive flow regulating device;

[0053] 300, gas circuit drive subsystem; 310, air compressor; 320, gas distribution device; 330, first gas circuit supply module; 331, gas volume adjustment mechanism; 332, second stop valve; 333, second one-way valve; 340, second gas circuit supply module; 341, third stop valve; 350, gas outlet adjustment device; 360, heat exchanger;

[0054] 400, fire extinguishing agent supply subsystem; 410, feed pump group; 420, feed delivery pipeline; 430, third one-way valve; 440, mixing ratio regulator; 450, fourth one-way valve; 460, discharge pipeline; 470, fourth stop valve; 480, pipeline discharge device; 490, spare storage container;

[0055] 500, gas circuit control subsystem; 510, gas circuit control module; 511, control valve; 512, control gas pipe; 520, third gas circuit supply module; 521, first one-way valve; 522, spare gas storage container;

[0056] 600. Mixture storage container;

[0057] 700, chassis; 710, control panel;

[0058] 1000. Fire extinguisher; 2000. Water supply system; 3000. Fire extinguishing agent storage container. DETAILED DESCRIPTION

[0059] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0060] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0061] See also Figure 1 , Figure 2 and Figure 3 , this embodiment provides a fire extinguishing system that can be used for fire fighting.

[0062] In this embodiment, the fire extinguishing system includes a mixing subsystem 100, a hydraulic drive subsystem 200, a gas circuit drive subsystem 300, and a fire extinguishing agent supply subsystem 400. The mixing subsystem 100, the hydraulic drive subsystem 200, the gas circuit drive subsystem 300, and the fire extinguishing agent supply subsystem 400 can be integrated in the same chassis 700 to facilitate subsequent overall transportation and movement, and have better portability.

[0063] Please also read Figure 5The mixing subsystem 100 includes a mixing device 110 for mixing fire extinguishing agents, a liquid inlet pipe 120 for connecting to an external water supply system 2000, and a liquid outlet pipe 130 for connecting to a fire extinguishing gun 1000. The mixing device 110 is provided with a mixing chamber 111 and a material supply interface 112 and an air supply interface 113 connected to the mixing chamber 111 are provided along the water flow direction. The mixing chamber 111 is a through structure, with a liquid inlet at one end and a liquid outlet at the other end. The liquid inlet allows water to enter. Then, in the mixing chamber 111, the water is first mixed with the fire extinguishing agent coming out of the material supply interface 112, and then further mixed with the compressed air coming out of the air supply interface 113. The supply route of the fire extinguishing agent and the supply route of the compressed air are described in detail in the fire extinguishing agent supply subsystem 400 and the air circuit drive subsystem 300 below.

[0064] The hydraulic drive subsystem 200 is used to connect to an external water supply system 2000 and includes a hydraulic drive device 210 for converting hydraulic potential energy and kinetic energy into mechanical energy. In other words, the hydraulic drive device 210 can be driven by the water pressure of the external water supply system 2000 so that the hydraulic drive device 210 outputs power, which is output torque in this embodiment.

[0065] The air circuit driving subsystem 300 includes an air compressor 310 and an air distribution device 320. The air compressor 310 is transmission-connected to the hydraulic driving device 210. The air distribution device 320 is connected to the air outlet of the air compressor 310. The air distribution device 320 is connected to the air supply interface 113 via a first air circuit supply module 330.

[0066] The fire extinguishing agent supply subsystem 400 includes a feed pump group 410, which is connected to the gas distribution device 320 through the second gas supply module 340. The gas distribution device 320 drives the feed pump group 410 to work through the airflow, wherein the feed end of the feed pump group 410 is used to connect to the external fire extinguishing agent storage container 3000, and the discharge end of the feed pump group 410 is connected to the feed interface 112 through the feed delivery pipeline 420. The fire extinguishing agent storage container 3000 is used to store the fire extinguishing stock liquid used for fire extinguishing, such as foam liquid.

[0067] It can be understood that the fire extinguishing system includes a hydraulic drive system. The hydraulic drive device 210 in the hydraulic drive subsystem 200 can directly convert hydraulic potential energy into mechanical energy and drive the air compressor 310 in the air circuit drive subsystem 300 to work. Therefore, the air circuit drive subsystem 300 supplies compressed gas to the air supply interface 113 of the mixing device 110 through the first air circuit supply module 330 on the one hand, and provides driving compressed gas to the feed pump group 410 in the fire extinguishing agent supply subsystem 400 through the second air circuit supply module 340 on the other hand, so as to drive the feed pump group 410 to supply fire extinguishing agent to the feed interface 112 of the mixing device 110. Finally, water and fire extinguishing agent are first mixed in the same mixing chamber 111 of the mixing device 110 and then further mixed with compressed air, thereby improving the mixing effect.

[0068] In this way, the power source required for the fire extinguishing system provided in this embodiment is the external water supply system 2000, and there is no need to configure a large engine for power supply. As a result, the overall volume and weight are smaller, making it easier to carry into different fire extinguishing areas and not restricted by the site. This greatly increases the scope of fire extinguishing operations, and hydraulic drive is more environmentally friendly.

[0069] Furthermore, the mixing of water, fire extinguishing agent and compressed air is completed in the same mixing chamber 111, and there is no need to configure two mixing devices 110 for each mixing. This saves one mixing device 110, making the structure of the fire extinguishing system more compact, further reducing the volume and weight, and improving portability.

[0070] In order to more clearly describe the technical solution of the present application, the fire extinguishing system provided in this embodiment is described below, specifically as follows:

[0071] See also Figure 1 and Figure 2 The fire extinguishing system further includes an air circuit control subsystem 500 , which can be used to control the on / off and supply of airflow. The air circuit control subsystem 500 includes an air circuit control module 510 and a third air circuit supply module 520 .

[0072] The gas circuit control module 510 is connected to the first gas circuit supply module 330 and the second gas circuit supply module 340 respectively through the control gas pipe 512. One end of the third gas circuit supply module 520 is connected to the gas distribution device 320, and the other end is connected to the gas circuit control module 510. In this way, the third gas circuit supply module 520 can deliver the airflow supplied by the gas distribution device 320 to the gas circuit control module 510, thereby delivering the airflow for control to the gas circuit control module 510. It can be understood that the gas circuit control module 510 can control the on and off of the airflow supply in the first gas circuit supply module 330 and the second gas circuit supply module 340 through the airflow.

[0073] See also Figure 2, along the air flow conveying direction in the third air supply module 520, the third air supply module 520 includes a first one-way valve 521 and a spare air storage container 522 which are sequentially connected by pipelines. Among them, the cut-off direction of the first one-way valve 521 is opposite to the air flow conveying direction in the third air supply module 520 to prevent the air flow in the spare air storage container 522 from flowing back. The spare air storage container 522 can store a certain amount of air flow, and when the air compressor 310 is not working, the air flow in the spare air storage container 522 can continue to control the operation of the air control module 510.

[0074] The air circuit control module 510 is provided with a plurality of control valves 511, each of which is connected to at least one control air pipe 512. The control valve 511 can control the on-off of the air flow supply in the corresponding control air pipe 512. Optionally, the control valve 511 can be controlled by a controller configured in the fire extinguishing system, and the controller can be powered by a built-in small-capacity battery or an external power supply.

[0075] Optionally, the controller is a single chip microcomputer or a PLC controller. Of course, in some embodiments, the on-off of the control valve 511 can also be manually controlled.

[0076] See also Figure 1 and Figure 2 , along the water flow conveying direction in the mixing subsystem 100, the mixing subsystem 100 further includes a first stop valve 140 arranged downstream of the mixing device 110. That is to say, the first stop valve 140 is located at the liquid outlet side of the mixing device 110, and the first stop valve 140 is connected to the mixing device 110. Among them, the first stop valve 140 is connected to the air circuit control module 510 through the control air pipe 512, so as to be controlled by the air flow in the air circuit control module 510. In this way, the air circuit control module 510 can control the switch of the first stop valve 140 through the air flow, thereby controlling whether the mixed liquid mixed in the mixing device 110 is conveyed to the fire extinguishing gun 1000.

[0077] Please also read Figure 4 and Figure 5 Furthermore, the mixing subsystem 100 further includes a pipeline adapter 150, which is disposed between the first stop valve 140 and the mixing device 110. In this embodiment, the pipeline adapter 150 can be directly mounted on the mixing device 110, and a spoiler column cavity 151 is disposed in the pipeline adapter 150. The liquid outlet direction of the liquid outlet of the mixing device 110 is the radial direction of the spoiler column cavity 151, so that the mixed liquid discharged from the mixing device 110 enters along the radial direction of the spoiler column cavity 151 and hits the inner wall of the spoiler column cavity 151 to form turbulence, and then enters the first stop valve 140 after being stirred and mixed evenly, further improving the mixing effect.

[0078] Among them, the pipeline adapter 150 not only intensifies the mixing effect, but also abandons the traditional right-angle elbow structure (adopting a disturbed column cavity), so the pipeline can be turned with a small turning radius. This structure is extremely suitable for compact structures or small-sized space installation. It can save installation space when used in fire extinguishing systems, making the internal structure of the entire fire extinguishing system more compact and the external dimensions smaller.

[0079] In this embodiment, the mixing chamber 111 is a single-chamber structure, and the cross-sectional shape of the mixing chamber 111 along the axial direction is a Venturi tube shape. In this way, when the water flow enters the mixing chamber 111, the water pressure first passes through a section of a tapered pipe to achieve pressurization, thereby accelerating the water flow rate to form a negative pressure in the mixing chamber 111, thereby accelerating the injection amount of the fire extinguishing agent and compressed air, and at the same time accelerating the mixing under the action of the high-pressure water flow to improve the mixing effect.

[0080] In some embodiments, the mixing subsystem 100 further includes a mixing flow regulating device 160 connected to the mixing device 110. The mixing flow regulating device 160 is arranged upstream of the mixing device 110 along the water flow conveying direction in the mixing subsystem 100 and is connected to the mixing device 110 through a pipeline. The mixing flow regulating device 160 is used to adjust the water flow rate of the mixing device 110.

[0081] Furthermore, the mixed flow regulating device 160 is controlled and regulated by airflow. Specifically, the mixed flow regulating device 160 has a pneumatic actuator 161, wherein the pneumatic actuator 161 of the mixed flow regulating device 160 is connected to the air circuit control module 510 in the air circuit control subsystem 500 through a control air pipe 512. The air circuit control module 510 controls the action of the pneumatic actuator 161 through airflow, thereby adjusting the opening size of the valve in the mixed flow regulating device 160 to achieve the purpose of flow regulation.

[0082] It is understandable that the mixed flow regulating device 160 can regulate the liquid flow entering the mixing chamber 111 to achieve the effect of controlling the fire extinguishing system to spray dry or wet mixed liquid. For example, it can be adjusted to a dry foam mode to spray dry compressed air foam mixed liquid, or it can also spray wet compressed air foam mixed liquid.

[0083] Optionally, the pneumatic actuator 161 is preferably a pneumatic push rod, and a driving rod and a driving connecting plate are installed on the push rod end, which can be assembled on the control rod of the valve in the mixing flow regulating device 160.

[0084] In some embodiments, a fifth one-way valve 170 is further provided upstream of the mixing flow regulating device 160 , and the cut-off direction of the fifth one-way valve 170 is opposite to the water flow direction in the mixing subsystem 100 , thereby preventing the water entering the mixing subsystem 100 from flowing back.

[0085] See also Figure 1 and Figure 2 , along the air flow conveying direction in the first air supply module 330, the first air supply module 330 includes an air volume regulating mechanism 331, a second stop valve 332 and a second one-way valve 333 which are sequentially connected by pipelines. Among them, the air volume regulating mechanism 331 can be used to adjust the size of the air flow in the first air supply module 330, and the air volume regulating mechanism 331 can also be electrically controlled by the controller, or manually controlled. The second stop valve 332 is connected to the air circuit control module 510 through the control air pipe 512, so that the air flow in the air circuit control module 510 controls the on-off. In this way, the control principle of the second stop valve 332 is consistent with the control principle of the first stop valve 140 mentioned above. The outlet of the second one-way valve 333 is connected to the air supply interface 113 of the mixing device 110, and the cut-off direction of the second one-way valve 333 is opposite to the air flow delivery direction in the first air supply module 330. In this way, the air flow entering the mixing device 110 can be prevented from flowing back or the water in the mixing chamber 111 can be prevented from entering the first air supply module 330, thereby ensuring the normal operation of the first air supply module 330.

[0086] It can be understood that the air volume of the air compressor 310 is determined by the torque provided by the hydraulic drive device 210, the outlet pressure is set to a fixed pressure by the self-control mold, and the opening and closing of the air inlet valve can be controlled by monitoring the gas pressure at the outlet end. Among them, the air volume adjustment mechanism 331 and the air volume distribution device 320 can further adjust the air volume entering the mixing device 110.

[0087] See also Figure 2 The second gas supply module 340 includes a third stop valve 341, which is disposed between the gas distribution device 320 and the feed pump group 410. The third stop valve 341 is connected to the gas control module 510 through a control air pipe 512, so that the gas flow in the gas control module 510 controls the on-off, thereby controlling the start and stop of the feed pump group 410. It can be understood that the control principle of the third stop valve 341 is consistent with the control principle of the first stop valve 140 described above.

[0088] It should be noted that the gas distribution device 320 can distribute the compressed air produced by the air compressor 310 to the first gas supply module 330, the second gas supply module 340 and the third gas supply module 520. In some embodiments, the fourth gas supply module or the fifth gas supply module can also be arranged according to the system structure. Thus, in this embodiment, the gas distribution device 320 has at least three gas outlets, and the gas distribution device 320 can be manually controlled to distribute compressed gas to the corresponding gas outlets, and of course it can also be electrically controlled.

[0089] Furthermore, the air circuit driving subsystem 300 also includes an air outlet regulating device 350 , which is disposed between the air compressor 310 and the air distribution device 320 and is used to regulate the air intake volume of the air distribution device 320 .

[0090] The air outlet regulating device 350 is installed at the air outlet of the air compressor 310 and can monitor the air outlet pressure. When the shut-off valves of the three routes of the air outlet of the air compressor 310 are closed, the air circuit pressure will continue to increase, which may easily cause a "pipe burst" accident. To avoid this situation, the air outlet regulating device 350 feeds back information to the pneumatic regulating module of the regulating device according to the size of the air outlet pressure. The pneumatic regulating module controls the opening of the air inlet of the air compressor 310. In this way, even if the hydraulic drive device 210 continues to provide power to the air compressor 310, the air compressor 310 can automatically control the air production volume, so that the overall system can operate normally and stably.

[0091] Please also read Figure 2 The fire extinguishing agent supply subsystem 400 further includes a third one-way valve 430, a mixing ratio regulator 440 and a fourth one-way valve 450 which are sequentially connected along the fire extinguishing agent delivery direction through the feed delivery pipeline 420. The third one-way valve 430 is connected to the outlet end of the feed pump group 410, and the outlet end of the fourth one-way valve 450 is connected to the mixing device 110. The cut-off direction of the third one-way valve 430 and the fourth one-way valve 450 is opposite to the fire extinguishing agent delivery direction.

[0092] In some embodiments, the fire extinguishing agent supply subsystem 400 further includes a fourth stop valve 470 and a pipeline discharge device 480 which are sequentially connected through a discharge pipeline 460, the discharge pipeline 460 is connected to the feed delivery pipeline 420 in the fire extinguishing agent supply subsystem 400, and the pipeline discharge device 480 is located at the end of the discharge pipeline 460. The fourth stop valve 470 is connected to the gas circuit control module 510 through a control gas pipe 512 to be controlled by the air flow in the gas circuit control module 510. In this embodiment, the control principle of the fourth stop valve 470 is consistent with the control principle of the first stop valve 140 described above.

[0093] It can be understood that the fourth stop valve 470 is responsible for the vacuum self-priming function of the feed delivery pipeline 420 connected to the feed pump group 410. After the feed pump group 410 works normally, the feed delivery pipeline 420 will contain segmented air, which affects the flow rate and quality of the fire extinguishing agent sucked up by the feed pump group 410. The fourth stop valve 470 is set on the branch discharge pipeline 460. After opening the fourth stop valve 470, the air can be discharged from the pipeline discharge device 480 in time. When the pipeline discharge device 480 discharges excess fire extinguishing agent, the fourth stop valve 470 is closed at this moment. At this time, the fire extinguishing agent can fill the feed delivery pipeline 420, and then enter the mixing ratio regulator 440 to adjust the required ratio, and finally enter the mixing device 110 through the feed interface 112. Among them, the fourth stop valve 470 is controlled by the air circuit control module 510, and the injection or closing is controlled by one key.

[0094] In this embodiment, the fire extinguishing agent supply subsystem 400 further includes a spare storage container 490 for storing the fire extinguishing agent, and the spare storage container 490 is disposed on the feed delivery pipeline 420, or the spare storage container 490 is disposed on the discharge pipeline 460 and is located upstream of the fourth stop valve 470. The capacity of the spare storage container 490 is smaller than that of the fire extinguishing agent storage container 3000, and can also be understood as a small tank to reduce the weight and space occupied in the fire extinguishing system.

[0095] The fire extinguishing agent storage container 3000 is external, and is sucked by the feed pump group 410, and the required ratio is adjusted by the mixing ratio regulator 440 on the feed delivery pipeline 420, and then enters the mixing device 110. Excess fire extinguishing agent can be temporarily stored in the spare storage container 490 to ensure that the fire extinguishing system can continue to work when the fire extinguishing agent storage container 3000 is replaced, ensuring the continuity of the fire extinguishing work.

[0096] Optionally, the mixing ratio regulator 440 preferably has a stepless adjustment structure, and can cover all medium inputs such as Class A and Class B fire extinguishing agent concentrates with a mixing ratio of 0.3%, 1%, 3%, and 6% according to product configuration. It should be understood that the above is only an example and is not intended to limit the scope of protection of this application.

[0097] See also Figure 1 The air circuit driving subsystem 300 also includes a heat exchanger 360, the primary side of which is connected to the lubricating oil circulation pipeline of the air compressor 310, and the secondary side of which is connected to the water outlet of the hydraulic driving device 210 through the heat dissipation pipeline. In this way, the cooling medium of the heat exchanger 360 preferably comes from an external pressure water source; the external water source exchanges heat with the lubricating oil of the air compressor 310 to cool the lubricating oil, thereby ensuring that the air compressor 310 operates stably and safely for a long time.

[0098] Along the water flow conveying direction in the hydraulic drive subsystem 200, the hydraulic drive subsystem 200 further includes a driving flow regulating device 220 arranged upstream of the hydraulic drive device 210, and the driving flow regulating device 220 is used to adjust the water inlet flow of the hydraulic drive device 210. Among them, the water inlet end of the driving flow regulating device 220 is used to connect to the external water supply system 2000, and the water outlet end of the hydraulic drive device 210 returns to the water supply system 2000 through the return pipe.

[0099] In some embodiments, the fire extinguishing system further includes a mixture storage container 600, and a discharge port of the mixture storage container 600 is connected to the mixing device 110. The mixture storage container 600 can store other types of mixtures or spare fire extinguishing agents to improve the fire extinguishing effect.

[0100] See also Figures 1 to 5 This embodiment also provides a fire extinguishing operation method applicable to the fire extinguishing system, which is applied to the fire extinguishing system provided according to the above embodiment 1. The fire extinguishing operation method includes the following steps:

[0101] S100: Connect the mixing subsystem 100 and the hydraulic driving subsystem 200 to the water supply system 2000, and install the fire extinguisher 1000.

[0102] S200: Install the fire extinguishing agent storage container 3000 and empty the fire extinguishing agent supply subsystem 400.

[0103] S300: Start the external water supply system 2000 to supply water and ensure that the outlet of the mixing subsystem 100 connected to the fire extinguisher 1000 remains closed, so that all the water flow is used to drive the hydraulic drive device 210, and then the hydraulic drive device 210 drives the air compressor 310 to prepare compressed air.

[0104] S400: When the prepared amount of compressed air reaches the preset requirement, the fire extinguishing gun 1000 is started to start the fire extinguishing operation;

[0105] Among them, the water supply pressure of the water supply system 2000 is P, and satisfies: 0.6MPa≤P≤0.8MPa.

[0106] See also Figures 1 to 5 In order to more clearly understand the solution of the present application, the following is a supplementary description of the components in the fire extinguishing system:

[0107] The water source supplied by the external water supply system 2000 is divided into two routes to enter the fire extinguishing system, one of which enters the hydraulic drive device 210 through the driving flow regulating device 220, and uses the hydraulic potential energy and kinetic energy to convert it into mechanical energy through the hydraulic drive device 210, and then transmits it through the coupling mechanism 211 to drive the air compressor 310 to make the air compressor 310 work normally; the other route of pressurized water passes through the fifth one-way valve 170, the mixing flow regulating device 160, the mixing device 110, the pipeline adapter 150, and the first stop valve 140, and is finally transported to the fire extinguishing gun 1000 for fire extinguishing through the liquid outlet pipe 130, and then the fire extinguishing gun 1000 sprays the mixed liquid to extinguish the fire.

[0108] In this embodiment, the system is driven by an external water source with a certain pressure, wherein the water source preferably comes from a fire pump with a pressure of not less than 0.6MPa and not more than 0.8MPa. Municipal roadside fire hydrants, hand pumps, and fire water in buildings can be selected to improve the flexibility of fire extinguishing.

[0109] The hydraulic driving device 210 may be a hydraulic motor or a water turbine device.

[0110] The pipes in the fire extinguishing system can all be selected as high-quality anti-corrosion hard pipes, such as anodized aluminum alloy pipes or stainless steel pipes.

[0111] A filter can be added to the pipeline of the external water supply system 2000, which can filter out impurities and dirt, and ensure the normal operation of the fire extinguishing system.

[0112] The air compressor 310 is equipped with a heat dissipation exchanger 360 , which is connected to the water outlet of the hydraulic drive device 210 through a heat dissipation pipeline to take water and exchange heat with the lubricating oil in the air compressor 310 to achieve the heat dissipation requirement of the air compressor 310 .

[0113] In the initial state, the first stop valve 140 is closed by default, which can ensure that all water sources enter the hydraulic drive device 210. At this time, the air compressor 310 produces compressed air, passes through the air outlet adjustment device 350, and then enters the first air supply module 330, the second air supply module 340 and the third air supply module 520 of the fire extinguishing system through at least three routes through the air distribution device 320.

[0114] The first path passes through the first gas supply module 330, specifically, enters the mixing device 110 through the gas volume adjustment mechanism 331, the second stop valve 332 and the second one-way valve 333 for mixing;

[0115] The second route passes through the second gas supply module 340, specifically enters the feed pump group 410 through the third stop valve 341 to drive the feed pump group 410 to work, and the feed pump group 410 absorbs the fire extinguishing agent in the fire extinguishing agent storage container 3000 through the external suction port into the feed delivery pipeline 420, wherein the fire extinguishing agent takes foam liquid as an example. When the feed pump group 410 is just started, there should be air in the pipeline (feed delivery pipeline 420) connected to the feed pump group 410. If the pipeline is not emptied, it will affect The amount of foam liquid sucked and the accuracy of the amount of injection are affected, so a pipeline discharge device 480 and a fourth stop valve 470 are added here. When the feed pump group 410 is working, the fourth stop valve 470 is opened to exhaust the air in the pipeline connected to the feed pump group 410, and the excess foam liquid can be stored in the spare storage container 490. The sucked uniform foam liquid passes through the third one-way valve 430, the mixing ratio regulator 440 and the fourth one-way valve 450 and then enters the mixing device 110 to mix with water;

[0116] The third route enters the gas circuit control module 510 through the third gas circuit supply module 520, specifically through the first one-way valve 521 and the spare gas storage container 522. The spare gas storage container 522 provides power for the gas circuit control module 510 and is operated and controlled by the control valve 511 in the gas circuit control module 510.

[0117] The spare gas storage container 522 can store compressed gas with a capacity of not less than 1L and a pressure of not less than 8 bar. The stored gas can be used to temporarily control the gas circuit control module 510 after the system loses power source.

[0118] After the fire extinguishing system works, there will be residual liquid in the pipeline and residual gas in the spare gas storage container 522. If the residual is not discharged in time, it will easily scale and accumulate in the pipeline and container. The spare gas storage container 522 is also easy to oxidize, which is not conducive to product transportation. Therefore, a pipeline discharge device 480 is set. The pipeline discharge device 480 is preferably controlled by a manual stop valve, and the discharge valve is manually operated to release the residual liquid and gas.

[0119] Part of the pressurized water, fire extinguishing agent (foam liquid) and compressed air are mixed in the mixing chamber 111 and enter the pipeline adapter 150 for uniform mixing and foaming. The mixture storage container 600 built into the fire extinguishing system can choose to inject the stored mixture into the mixing chamber 111 through pneumatic power. Then the first stop valve 140 is controlled to open to spray wet compressed air foam mixture for fire extinguishing. By controlling the pneumatic actuator 161, the water flow entering the mixing chamber 111 is adjusted to adjust the dry foam mode to spray dry compressed air foam mixture.

[0120] The mixing device 110 of the fire extinguishing system provided in this embodiment is provided with at least one mixing chamber 111, which can mix at least one type of mixed medium, and the mixed medium includes but is not limited to chemical raw materials such as foam liquid and dry powder. The mixing chamber 111 adopts the structure of a first-of-its-kind single mixing chamber to mix the fire extinguishing agent and the compressed gas at the same time. The pipe spacing between the injection port for injecting the fire extinguishing agent and the injection port for injecting the compressed gas in the mixing chamber 111 is less than or equal to 100mm, and the injection angle and the injection port adopt a special structure. The injection ports are at a certain angle with the water flow direction, and the angle is between 30° and 60°, preferably 45° injection angle, so that water, fire extinguishing agent, and compressed gas are fully mixed and foamed in a certain proportion. The mixing relationship among the three is as follows:

[0121] Taking foam fire extinguishing agent as an example, the definition of foaming multiple E is: the ratio of a certain volume of foam to the volume of mixed liquid when the ambient temperature is 20°C. The formula is: E = Vρ / m; where V is the foam volume, m is the net weight of the foam liquid, and ρ is the density of the foam liquid.

[0122] To ensure the injection volume, the foam liquid pressure is greater than the water supply pressure, specifically, the foam liquid pressure is slightly greater than the water supply pressure. The injection flow rate is controlled by the mixing ratio regulator 440 at a fixed ratio, such as 0.3%, 0.7%, 1%, etc.;

[0123] In this embodiment, the air pressure of the compressed air is greater than the supplied water pressure, specifically, the air pressure of the compressed air is slightly greater than the supplied water pressure. The ratio of the injected flow rate of the compressed air to the ejected flow rate of the mixed liquid is the gas-liquid ratio, and the gas-liquid ratio is ≥6 according to the foaming multiple requirement; the water, foam liquid, and compressed gas are fully mixed and foamed, and as a result, the foaming multiple of the compressed air foam mixed liquid produced by the mixing chamber 111 is not lower than the international standard requirements, and is equal to the foaming effect produced by the outlet of the fire gun of a conventional compressed air foam fire truck;

[0124] The spoiler column cavity 151 in the pipeline adapter 150 can disturb the mixed liquid and enhance the mixing effect; the spoiler column cavity 151 is a cylindrical cavity, and the pipeline adapter 150 and the mixing device 110 are quickly installed in a snap-on form. In addition to intensifying the mixing effect, because the traditional right-angle elbow structure is abandoned, the pipeline can be turned with a small turning radius. This structure is extremely suitable for compact structures or small-size space installation.

[0125] The controller can be integrated on the control panel 710 of the chassis 700, and the control panel 710 can control each subsystem in the fire extinguishing system. The chassis 700 can also be provided with an interface, which is connected using a conventional fire interface, and can quickly match a fire hose and quickly form a hydraulic drive circulation pipeline.

[0126] It should be noted that in the present application, unless otherwise specified, the terms "upstream", "downstream", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0127] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0128] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0129] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0130] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fire extinguishing system, characterized in that: include: A mixing subsystem (100) comprises a mixing device (110) for mixing fire extinguishing agents, a liquid inlet pipe (120) for connecting to an external water supply system (2000), and a liquid outlet pipe (130) for connecting to a fire extinguishing gun (1000); the mixing device (110) is provided with a mixing chamber (111) and is also provided with a material supply interface (112) and a gas supply interface (113) communicating with the mixing chamber (111) along a water flow direction; A hydraulic drive subsystem (200), used to be externally connected to the water supply system (2000) and comprising a hydraulic drive device (210) for converting hydraulic potential energy into mechanical energy; The air circuit drive subsystem (300) comprises an air compressor (310) and an air distribution device (320), wherein the air compressor (310) is drivingly connected to the hydraulic drive device (210), the air distribution device (320) is connected to the air outlet of the air compressor (310), and the air distribution device (320) is connected to the air supply interface (113) via a first air circuit supply module (330); The fire extinguishing agent supply subsystem (400) comprises a feed pump group (410), wherein the feed pump group (410) is connected to the gas distribution device (320) via a second gas supply module (340), and the gas distribution device (320) drives the feed pump group (410) to work via airflow; The feed end of the feed pump group (410) is used to be connected to an external fire extinguishing agent storage container (3000), and the discharge end of the feed pump group (410) is connected to the feed interface (112).

2. The fire extinguishing system according to claim 1, characterized in that: The fire extinguishing system further comprises a gas circuit control subsystem (500), wherein the gas circuit control subsystem (500) comprises: an air path control module (510), connected to the first air path supply module (330) and the second air path supply module (340) respectively through a control air pipe (512), and used for controlling the on and off of air flow supply in the first air path supply module (330) and the second air path supply module (340) through air flow; A third gas supply module (520) is connected to the gas distribution device (320) at one end and to the gas control module (510) at the other end, and is used to deliver a controlled airflow to the gas control module (510).

3. The fire extinguishing system according to claim 2, characterized in that: Along the air flow conveying direction in the third air supply module (520), the third air supply module (520) comprises a first one-way valve (521) and a spare air storage container (522) which are sequentially connected by pipelines; Wherein, the cut-off direction of the first one-way valve (521) is opposite to the air flow conveying direction in the third air supply module (520).

4. The fire extinguishing system according to claim 2, characterized in that: Along the water flow conveying direction in the mixing subsystem (100), the mixing subsystem (100) further comprises a first stop valve (140) and a pipeline adapter (150) arranged downstream of the mixing device (110); The pipeline adapter (150) is arranged between the first stop valve (140) and the mixing device (110), and a flow-turbulating column cavity (151) is provided in the pipeline adapter (150); The first stop valve (140) is connected to the air path control module (510) via a control air pipe (512) so as to be controlled by the air flow in the air path control module (510).

5. The fire extinguishing system according to claim 2, characterized in that: Along the air flow conveying direction in the first air supply module (330), the first air supply module (330) comprises an air volume regulating mechanism (331), a second stop valve (332) and a second one-way valve (333) which are sequentially connected by pipelines; The second stop valve (332) is connected to the air circuit control module (510) via a control air pipe (512) so as to be on and off controlled by the air flow in the air circuit control module (510), and the stop direction of the second one-way valve (333) is opposite to the air flow conveying direction in the first air circuit supply module (330).

6. The fire extinguishing system according to claim 2, characterized in that: The second gas supply module (340) comprises a third stop valve (341), and the third stop valve (341) is arranged between the gas distribution device (320) and the feed pump group (410); The third stop valve (341) is connected to the air path control module (510) via a control air pipe (512) so as to be on and off controlled by the air flow in the air path control module (510).

7. The fire extinguishing system according to claim 2, characterized in that: The fire extinguishing agent supply subsystem (400) further comprises a fourth stop valve (470) and a pipeline discharge device (480) which are connected in sequence via a discharge pipeline (460), wherein the discharge pipeline (460) is connected to a feed delivery pipeline (420) in the fire extinguishing agent supply subsystem (400), and the pipeline discharge device (480) is located at the end of the discharge pipeline (460); The fourth stop valve (470) is connected to the air circuit control module (510) via a control air pipe (512) so as to be on and off controlled by the air flow in the air circuit control module (510).

8. The fire extinguishing system according to claim 7, characterized in that: The fire extinguishing agent supply subsystem (400) further includes a backup storage container (490) for storing the fire extinguishing agent, wherein the backup storage container (490) is disposed on the feed delivery pipeline (420), or the backup storage container (490) is disposed on the discharge pipeline (460) and is located upstream of the fourth shut-off valve (470).

9. The fire extinguishing system according to any one of claims 1 to 8, characterized in that: The fire extinguishing agent supply subsystem (400) further comprises a third one-way valve (430), a mixing ratio regulator (440) and a fourth one-way valve (450) which are sequentially connected along the fire extinguishing agent conveying direction and through the supply conveying pipeline (420), wherein the third one-way valve (430) is connected to the outlet end of the supply pump group (410), and the outlet end of the fourth one-way valve (450) is connected to the mixing device (110); Wherein, the shutoff direction of the third one-way valve (430) and the fourth one-way valve (450) is opposite to the fire extinguishing agent delivery direction.

10. The fire extinguishing system according to claim 1, characterized in that: The air circuit drive subsystem (300) further comprises a heat dissipation exchanger (360), wherein the primary side of the heat dissipation exchanger (360) is connected to the lubricating oil circulation pipeline of the air compressor (310), and the secondary side of the heat dissipation exchanger (360) is connected to the water outlet of the hydraulic drive device (210) via a heat dissipation pipeline.

11. The fire extinguishing system according to claim 1, characterized in that: The mixing subsystem (100) further comprises a mixing flow regulating device (160) connected to the mixing device (110); along the water flow conveying direction in the mixing subsystem (100), the mixing flow regulating device (160) is arranged upstream of the mixing device (110) and is controlled and regulated by the air flow; The fire extinguishing system further comprises an air circuit control subsystem (500), the mixed flow regulating device (160) comprises a pneumatic actuator (161), and the pneumatic actuator (161) is connected to an air circuit control module (510) in the air circuit control subsystem (500) via a control air pipe (512).

12. The fire extinguishing system according to claim 1, characterized in that: Along the water flow conveying direction in the hydraulic drive subsystem (200), the hydraulic drive subsystem (200) further comprises a drive flow regulating device (220) arranged upstream of the hydraulic drive device (210), wherein the drive flow regulating device (220) is used to regulate the water inlet flow of the hydraulic drive device (210); The water inlet end of the driving flow regulating device (220) is used to be externally connected to the water supply system (2000), and the water outlet end of the hydraulic driving device (210) returns to the water supply system (2000) through a return pipe.

13. The fire extinguishing system according to claim 1, characterized in that: The air circuit driving subsystem (300) further comprises an air outlet regulating device (350), wherein the air outlet regulating device (350) is arranged between the air compressor (310) and the air volume distribution device (320) and is used to regulate the air intake volume of the air volume distribution device (320).

14. A fire extinguishing operation method, characterized in that: Applied to the fire extinguishing system according to any one of claims 1 to 13, the fire extinguishing operation method comprises: S100: connecting the mixing subsystem (100) and the hydraulic driving subsystem (200) to the water supply system (2000), and installing the fire extinguisher (1000); S200: installing the fire extinguishing agent storage container (3000) and emptying the fire extinguishing agent supply subsystem (400); S300: starting the external water supply system (2000) to supply water and ensuring that the outlet of the mixing subsystem (100) connected to the fire extinguisher (1000) remains closed, so that all the water flow is used to drive the hydraulic drive device (210), and then the hydraulic drive device (210) drives the air compressor (310) to prepare compressed air; S400: When the prepared amount of compressed air reaches a preset requirement, the fire extinguishing gun (1000) is activated to start the fire extinguishing operation; Wherein, the water supply pressure of the water supply system (2000) is P, and satisfies: 0.6MPa≤P≤0.8MPa.

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