Multifunctional experimental platform and system for flow state observation and pressure test of fire extinguishing agent

Abstract

The invention relates to the technical field of fire protection engineering, and discloses a multifunctional experiment platform for fire extinguishing agent flow state observation and pressure testing, the multifunctional experiment platform comprises at least one liquid storage pressurization unit, a multi-section experiment pipeline unit, a flow state observation unit and a data acquisition and control device, the multi-section experiment pipeline unit comprises a nozzle and a test experiment pipe; the flow state observation unit comprises a transparent closed box body and a closed observation cavity; wherein the test experiment pipe comprises a straight pipe experiment section and / or a bent pipe experiment section and / or a reducing experiment section, the straight pipe experiment section comprises at least two straight pipes, the bent pipe experiment section comprises at least one bent pipe, and the reducing experiment section comprises at least two reducing pipes. According to the multifunctional experiment platform, the vertical layout conforms to the natural flow direction of fluid, the structure is stable, the test experiment pipe is modularly designed, the test is flexible and efficient, the whole system is visible, controllable and high in recordability, and the experiment efficiency and safety are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of fire protection engineering technology, and in particular to a multifunctional experimental platform for the observation of the flow pattern and pressure testing of fire extinguishing agents, which is applicable to specific scenarios such as energy storage bins and battery packs, and is used for refined experimental research on the transport efficiency of novel fire extinguishing agents such as fine water mist and perfluorohexanone in complex pipeline systems. Background Technology

[0002] The statements in this section are merely to provide background information related to the disclosure of this invention and do not necessarily constitute prior art.

[0003] With the rapid development of electrochemical energy storage power stations, data centers, and other fields, the requirements for their internal precision fire suppression systems are increasing. The extinguishing agent is delivered from the storage tank through pump sets and pipeline distribution systems to the fire suppression point at the battery pack level. The entire process involves complex fluid dynamics. Friction along the pipeline and local resistance caused by fittings (such as elbows, reducers, and valves) lead to a gradual decrease in pressure. Improper pressure control can result in excessively high pressure damaging the battery pack structure, while insufficient pressure will prevent effective release and atomization of the extinguishing agent, leading to fire suppression failure.

[0004] Currently, the design of fire extinguishing agent delivery systems largely relies on computational fluid dynamics (CFD) simulations and theoretical calculations based on empirical formulas. However, these methods have significant limitations: First, the accuracy of simulation models is highly dependent on the setting of boundary conditions and physical property parameters, while the multiphase flow and transient flow characteristics of fire extinguishing agents in actual pipelines are difficult to simulate accurately; second, existing empirical formulas regarding friction coefficients and local resistance coefficients are mostly derived from experimental data of common fluids (such as water and air) in standard industrial pipelines, and their applicability and accuracy are questionable for certain fire extinguishing agents with non-Newtonian fluid properties, small pipe diameters (such as DN20-DN32), and complex structures such as specific quick-connect fittings.

[0005] Existing experimental setups also have significant shortcomings: most devices are limited in function or can only perform simple pressure tests, lacking synchronous visualization of fluid morphology; or the observation and testing sections are separate, making it impossible to establish a precise correspondence between pressure data and instantaneous flow states. Furthermore, these setups often suffer from low integration and poor flexibility, making it difficult to simulate actual engineering pipelines composed of straight pipes, reducing pipes, and bends, thus failing to provide comprehensive and reliable experimental data support for engineering design.

[0006] Therefore, there is an urgent need in this field for a comprehensive experimental platform that can highly integrate precise pressure measurement and high-definition flow observation, and can flexibly simulate various actual pipeline structures, in order to bridge the data gap between theoretical calculations, simulations and engineering practice. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, this invention provides a multifunctional experimental platform and system for observing and testing the flow regime of fire extinguishing agents. This platform enables synchronous, high-frequency acquisition of pressure data from key nodes in a pipeline system, with precise temporal correspondence to high-speed video recording of fluid morphology. It provides a clear observation window, allowing direct observation and recording of the flow state of the fire extinguishing agent within the pipeline (e.g., laminar, turbulent, vortex) and the jet pattern at the outlet (e.g., atomization angle, jet core length). Furthermore, it allows for flexible combination of different pipeline components to simulate real engineering pipeline layouts, thereby systematically measuring the friction coefficient and local resistance coefficient of various structures.

[0008] The technical solution adopted in this invention is: a multifunctional experimental platform for observing the flow state and pressure testing of extinguishing agents, comprising at least one liquid storage and pressurization unit, the liquid storage and pressurization unit including a liquid storage tank, and a pressurization valve, a venting valve, a pressure gauge, an extinguishing agent addition vessel, a feed valve, and a liquid outlet connected to the liquid storage tank; a multi-segment experimental pipeline unit, the multi-segment experimental pipeline unit including a nozzle for spraying the flowing extinguishing agent in a sealed observation chamber, and a test experimental tube that can be quickly replaced between the liquid outlet and the nozzle; a flow state observation unit, the flow state observation unit including a transparent sealed box and a sealed observation chamber, the sealed observation chamber being connected to the liquid outlet of the liquid storage and pressurization unit through the multi-segment experimental pipeline unit to obtain the flowing extinguishing agent; and a data acquisition and control device, the data acquisition and control device... The device includes a central control unit, pressure sensors, and a camera. The central control unit is equipped with a data acquisition card and control software to synchronously trigger the pressure sensors and the high-speed camera, and to receive, store, and process pressure data from the pressure sensors. The pressure sensors are respectively installed on the pressurization valve, the liquid outlet, and the multi-segment experimental pipeline unit to acquire their corresponding pressure data. The camera is positioned to be aimed at the sealed observation chamber to record and observe the spray characteristics of the extinguishing agent under different environmental pressures. The nozzle is connected to the test experimental tube, which includes a straight pipe test section and / or a bent pipe test section and / or a variable diameter test section. The straight pipe test section includes at least two straight pipe sections, the bent pipe test section includes at least one bent pipe section, and the variable diameter test section includes at least two stages of variable diameter pipes.

[0009] In this technical solution, the data acquisition and control device also includes a weighing device, which is placed at the bottom of the flow observation unit and connected to the central control unit to monitor the weight change data of the flow extinguishing agent in the flow observation unit in real time, and to facilitate the use of the weight change data of the flow extinguishing agent to evaluate the fire extinguishing performance of the extinguishing agent.

[0010] In this technical solution, the nozzle is located on the side wall of the sealed observation chamber to better observe the flow of the extinguishing agent.

[0011] In this technical solution, a flow meter is connected to the test tube to observe its flow status in real time.

[0012] In this technical solution, the multi-segment experimental pipeline unit is connected to the liquid outlet and the nozzle respectively through a controllable pressure valve.

[0013] In this technical solution, the multifunctional experimental platform further includes a support platform, which includes a liquid storage frame for supporting the liquid storage and pressurization unit and an observation frame for supporting the flow state observation unit, wherein the liquid storage frame and the observation frame are arranged in a stepped manner.

[0014] In this technical solution, the transparent sealed box is made of acrylic or optical glass, that is, a material with high transparency and high strength, so as to observe the changes of the fire extinguishing agent inside.

[0015] In this technical solution, the liquid storage frame and the observation frame are provided with support feet at the bottom, and the support feet are rollers or pillar structures.

[0016] In this technical solution, the camera device is a high-speed camera, and the sealed observation cavity is filled with transparent gel or low-pressure air. A shadowless light source is also provided on the side of the sealed observation cavity.

[0017] In this technical solution, a sealed vacuum interlayer is provided on the outside of the transparent sealed box, which is either evacuated or filled with nitrogen.

[0018] A multifunctional experimental platform system for observing the flow state and pressure testing of extinguishing agents, comprising the aforementioned multifunctional experimental platform system, further comprising a data processing module, wherein the data processing module is used to acquire data from the central control unit, pressure sensor and camera device, and to perform modeling, visualization processing and display.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. High integration and synchronization: It creatively integrates liquid storage, pressurization, multi-segment pipeline testing, flow observation and data acquisition into a vertically compact device, achieving precise synchronization of pressure data and flow images at the millisecond level, providing invaluable first-hand experimental data for establishing accurate fluid-structure interaction models;

[0020] 2. Comprehensive and accurate data: By densely arranging pressure measurement points along multiple pipe sections, the friction loss along the straight pipe and the local pressure loss of each pipe fitting (reducer, elbow) can be accurately separated. Combined with high-speed imaging, the causal relationship between pressure loss and specific flow patterns (such as separation vortices, reattachment zones) can be intuitively revealed;

[0021] 3. Modular and highly flexible: The device adopts a modular design, allowing users to quickly replace pipe sections of different diameters and angles like "building blocks" according to experimental needs, easily constructing a variety of pipe combinations, which greatly expands the experimental range and applicability of the device.

[0022] 4. Strong Engineering Guidance Value: This invention fills a critical gap between small-scale experimental verification and full-scale engineering application of fire extinguishing agent delivery systems. The actual resistance coefficient obtained through this device can be directly used to optimize the design of a three-stage piping system, ensuring that the pressure reduction from the primary main pipe to the tertiary pack branch pipes is within a controllable, safe, and effective range, fundamentally avoiding discharge failure or battery pack structural damage caused by improper pressure design.

[0023] 5. Operational Safety and Visualization: The vertical layout conforms to the natural flow direction of fluids, ensuring structural stability. The enclosed design of the observation box not only protects the observation environment from external interference but also prevents contamination of the laboratory environment by fire extinguishing agent spray. The entire experimental process is visible, controllable, and recordable, greatly improving experimental efficiency and safety.

[0024] In summary, the multifunctional experimental platform for observing the flow pattern and pressure testing of fire extinguishing agents of the present invention has a vertical layout that conforms to the natural flow direction of fluids, a stable structure, and a modular design for the test tubes, making testing flexible and efficient. Furthermore, the entire system has high visibility, controllability, and recordability, which greatly improves the efficiency and safety of the experiment. Attached Figure Description

[0025] Figure 1 This is a front view of one embodiment of the multifunctional experimental platform; Figure 2 A three-dimensional structural diagram of another embodiment of the multifunctional experimental platform; Figure 3 for Figure 2 Main view of the multifunctional experimental platform; Figure 4 for Figure 3 AA section view; Figure 5 for Figure 2 A top view of the multifunctional experimental platform; Figure 6 This is the control principle diagram of the multifunctional experimental platform; The components are as follows: 10-Liquid storage and pressurization unit, 11-Liquid storage tank, 12-Pressure valve, 13-Vent valve, 14-Pressure gauge, 15-Fire extinguishing agent addition container, 16-Liquid outlet, 17-Feed valve; 20-Multi-segment experimental pipeline unit, 21-Test experimental tube, 22-Nozzle, 23-Flow meter, 24-Controllable pressure valve; 30-Flow observation unit, 31-Transparent sealed box, 32-Sealed observation chamber, 33-Sealed vacuum jacket, 34-Transparent gel or low-pressure air, 35-Shadowless light source; 40-Data acquisition and control device, 41-Central control unit, 42-Pressure sensor, 43-Camera device, 44-Weighing device, 45-Data processing module; 50-Support platform, 51-Liquid storage frame, 52-Observation frame, 53-Supporting foot. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the combination or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, in the description of the embodiments of this invention, the positional relationships of devices such as "upper," "lower," "front," "rear," "left," and "right" in all figures are based on… Figure 1 As the standard.

[0028] like Figure 1 and Figure 2 , Figure 3As shown, a multifunctional experimental platform for observing the flow state and pressure testing of fire extinguishing agents includes at least one liquid storage and pressurization unit 10, a multi-segment experimental pipeline unit 20, a flow state observation unit 30, and a data acquisition and control device 40. The liquid storage and pressurization unit 10 includes a liquid storage tank 11, and a pressurization valve 12, a venting valve 13, a pressure gauge 14, a fire extinguishing agent addition container 15, a feed valve 17, and a liquid outlet 16 connected to the liquid storage tank 11. The multi-segment experimental pipeline unit 20 includes a nozzle 22 for spraying the flow extinguishing agent within a sealed observation chamber 32, and a test tube 21 that can be quickly replaced between the liquid outlet 16 and the nozzle 22. The flow state observation unit 30 includes a transparent sealed box 31 and a sealed observation chamber 32. The sealed observation chamber 32 is connected to the liquid outlet 16 of the liquid storage and pressurization unit 10 via the multi-segment experimental pipeline unit 20 to obtain the flow extinguishing agent. The data acquisition... The control device 40 includes a central control unit 41, a pressure sensor 42, and a camera device 43. The central control unit 41 is equipped with a data acquisition card and control software to synchronously trigger the pressure sensor and the high-speed camera, and to receive, store, and process pressure data from the pressure sensor 42. The pressure sensor 42 is respectively installed on the pressurization valve 12, the liquid outlet 16, and the multi-segment experimental pipeline unit 20 to acquire their corresponding pressure data. The camera device 43 is positioned to be aimed at the sealed observation chamber 32 to record and observe the spray characteristics of the extinguishing agent under different environmental pressures. The nozzle 22 is connected to the test experimental tube 21, which includes a straight pipe test section and / or a bent pipe test section and / or a variable diameter test section. The straight pipe test section includes at least two straight pipe sections, the bent pipe test section includes at least one bent pipe section, and the variable diameter test section includes at least two stages of variable diameter pipes.

[0029] In the specific implementation process, the storage tank 11 is made of a corrosion-resistant and pressure-bearing material (such as stainless steel or transparent polycarbonate). The pressure valve 12 is connected to an external gas source (such as an air compressor or nitrogen cylinder) to apply controllable gas pressure to the storage tank 11, serving as the power source to drive the extinguishing agent to flow in the pipeline, simulating pumping pressure. The vent valve 13 / pressure relief valve is used to release the pressure inside the tank after the experiment, or to ensure system safety during calibration and maintenance. The pressure gauge 14 is a mechanical pressure gauge used to visually display the real-time pressure value inside the storage tank, serving as a preliminary reference for the system pressure. A level gauge (optional) can also be installed on the storage tank 11 to display the remaining amount of extinguishing agent in the tank.

[0030] Figure 1As shown, the test tube 21 includes a straight pipe test section and / or a bent pipe test section and / or a reducing pipe test section. The straight pipe test section includes at least two straight pipe sections, the bent pipe test section includes at least one bent pipe section, and the reducing pipe test section includes at least two stages of reducing pipes. It adopts a modular design concept, with pipe sections of different functions connected sequentially by standard connectors (such as flanges and quick-connect fittings). The main pipe section types include: (1) Straight pipe test section: Provide at least two different pipe diameters (such as DN32 and DN20), with a length of 1-3 meters, to study the friction resistance characteristics of the extinguishing agent flowing in the straight pipe; (2) Variable Diameter Test Section: This section integrates at least two stages of variable diameter structures, such as a sudden reduction tube from DN32 to DN25, and a sudden reduction tube from DN25 to DN20. The variable diameter joint is used to study the local pressure loss caused by the sudden change in pipe diameter; (3) Bend test section: This section contains one or more bends with adjustable bend angles (e.g., 30°, 45°, 90°) and bends with different pipe diameters (e.g., DN32 equal diameter bend, DN32 to DN25 reducing bend) to study local pressure loss under different combinations of bending angles and pipe diameters.

[0031] In at least one embodiment, such as Figure 1 As shown, the data acquisition and control device 40 also includes a weighing device 44, which is placed at the bottom of the flow observation unit 30 and connected to the central control unit 41. This weighing device 44 monitors the weight change data of the flowing extinguishing agent within the flow observation unit 30 in real time, facilitating the evaluation of the extinguishing agent's performance using this data. The data acquisition and control device 40 primarily performs pressure testing and consists of multiple high-precision, high-frequency response pressure sensors. These sensors are precisely positioned at key locations on the test tube, including but not limited to: the inlet and outlet of each pipe section, before and after the reducer, and before and after bends. The pressure sensors are connected to the central control unit via signal lines or transmit data wirelessly using methods such as ZigBee or LoRa. The camera device 43 mainly consists of one or more high-speed cameras. Facing the observation box, the camera device records the instantaneous flow changes, atomization process, and jet development of the extinguishing agent after it is ejected from the nozzle at an extremely high frame rate (e.g., over 1000 frames per second). To ensure image quality, the system is also equipped with a high-brightness LED shadowless light source 35.

[0032] The central control unit 41 is typically an industrial computer or a high-performance PLC. Its built-in data acquisition card and control software are responsible for: synchronously triggering pressure sensors and high-speed cameras to ensure strict data alignment on the timeline; receiving, storing, and processing pressure data from all sensors; controlling the opening of the pressurization valve to achieve precise step or constant pressure control of the system; and performing post-analysis of the acquired pressure and image data, such as calculating drag coefficients and analyzing flow field morphology.

[0033] In at least one embodiment, the nozzle 22 is disposed on the side wall of the sealed observation chamber 32 in order to better observe the flow of the extinguishing agent. Specifically, during implementation, it can also be fixed to the side wall of the sealed observation chamber 32 for stable operation.

[0034] In at least one embodiment, such as Figure 1 As shown, a flow meter 23 is connected to the test tube 21 to observe the flow status of the extinguishing agent in real time.

[0035] In at least one embodiment, such as Figure 1 As shown, the multi-segment experimental pipeline unit 20 is connected to the liquid outlet 16 and the nozzle 22 through the controllable pressure valve 24, thereby obtaining more precise control over the flow state observation of the extinguishing agent.

[0036] In at least one embodiment, such as Figure 1 and Figure 2 As shown, the multifunctional experimental platform also includes a support platform 50, which includes a liquid storage frame 51 for supporting the liquid storage and pressurization unit 10, and an observation frame 52 for supporting the flow observation unit 30. The liquid storage frame 51 and the observation frame 52 are arranged in a stepped manner, from... Figure 1 as well as Figure 5 As can be seen, this facilitates the installation, disassembly, and replacement of the flow observation unit 30.

[0037] In at least one embodiment, such as Figure 1 and Figure 4 As shown, the transparent sealed box 31 is made of acrylic or optical glass, that is, a material with high transparency and high strength, so as to observe the changes of the fire extinguishing agent inside.

[0038] In at least one embodiment, such as Figure 1 and Figure 2 As shown, the liquid storage frame 51 and the observation frame 52 are provided with support feet 53 at the bottom. The support feet 53 are either rollers or pillar structures. When they are rollers, they are easy to move. When they are pillars, they are easy to support and fix.

[0039] In at least one embodiment, the camera device 43 is a high-speed camera, and the sealed observation chamber 32 is filled with transparent gel or low-pressure air 34. A shadowless light source 35 is also provided on the side of the sealed observation chamber 32, so that the jet pattern of the extinguishing agent sprayed from the nozzle can be clearly observed without interference. The high-speed camera can capture the image, which can be processed and analyzed together with the pressure data to determine the characteristics of the extinguishing agent. The camera device 43 is facing the sealed observation chamber 32 and records the instantaneous flow changes, atomization process and jet development of the extinguishing agent after it is sprayed from the nozzle at an extremely high frame rate, such as more than 1,000 frames per second. To ensure image quality, the system is also equipped with a high-brightness LED shadowless light source.

[0040] In at least one embodiment, such as Figure 4 As shown, a sealed vacuum interlayer 33 is also provided outside the transparent sealed box 31, which is evacuated or filled with nitrogen to study the spray characteristics of the extinguishing agent under different environmental pressures.

[0041] The multifunctional experimental platform system for fire extinguishing agent flow observation and pressure testing has the above-mentioned multifunctional experimental platform system. The multifunctional experimental platform system also includes a data processing module 45. The data processing module 45 is used to acquire data from the central control unit 41, pressure sensor 42 and camera device 43, and perform modeling, visualization processing and display.

[0042] This results in a multifunctional experimental platform system with the following characteristics: 1. Synchronous monitoring: Enables synchronous, high-frequency acquisition of pressure data at key nodes of the pipeline system, and ensures precise temporal correspondence with high-speed video recordings of fluid morphology; 2. Visual observation: Provides a clear observation window, enabling direct observation and recording of the flow state of the extinguishing agent in the pipeline (such as laminar flow, turbulent flow, vortex) and the spray pattern at the outlet (such as atomization angle and jet core length); 3. Modular testing: It can flexibly combine different pipeline components to simulate the layout of real engineering pipelines, thereby systematically measuring the friction coefficient and local resistance coefficient of various structures; 4. Engineering guidance: Obtain real and reliable resistance coefficient data through experiments, providing a solid data foundation for the refined design of fire extinguishing agent delivery systems, pump selection, pipeline optimization, and verification of computer models.

[0043] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A multifunctional experimental platform for observing the flow pattern and pressure testing of fire extinguishing agents, characterized in that, include: At least one liquid storage pressurization unit (10), the liquid storage pressurization unit (10) including a liquid storage tank (11), and a pressurization valve (12), a venting valve (13), a pressure gauge (14), a fire extinguishing agent addition vessel (15), a feed valve (17), and a liquid outlet (16) connected to the liquid storage tank (11); and A multi-segment experimental pipeline unit (20), comprising a nozzle (22) for spraying fluidized fire extinguishing agent within a sealed observation chamber (32), and a quickly replaceable test tube (21) positioned between the outlet (16) and the nozzle (22); and A flow observation unit (30) includes a transparent sealed box (31) and a sealed observation chamber (32). The sealed observation chamber (32) is connected to the outlet (16) of the liquid storage and pressurization unit (10) via a multi-segment experimental pipeline unit (20) to obtain the flow extinguishing agent; and The data acquisition and control device (40) includes a central control unit (41), a pressure sensor (42), and a camera device (43). The central control unit (41) is equipped with a data acquisition card and control software to synchronously trigger the pressure sensor and the camera device (43), and to receive, store, and process pressure data from the pressure sensor (42). The pressure sensor (42) is respectively installed on the pressurization valve (12), the liquid outlet (16), and the multi-segment experimental pipeline unit (20) to acquire their corresponding pressure data. The camera device (43) is positioned to be aimed at the sealed observation chamber (32) to record and observe the spray characteristics of the extinguishing agent under different environmental pressures in a timely manner. Wherein: and the nozzle (22) is connected to the test tube (21), the test tube (21) includes a straight tube test section and / or a bent tube test section and / or a variable diameter test section, the straight tube test section includes at least two straight tubes, the bent tube test section includes at least one bent tube, and the variable diameter test section includes at least two stages of variable diameter tubes.

2. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to claim 1, characterized in that: The data acquisition and control device (40) also includes a weighing device (44), which is placed at the bottom of the flow observation unit (30) and connected to the central control unit (41).

3. The multifunctional experimental platform for observing the flow pattern and pressure testing of extinguishing agents according to claim 2, characterized in that: The nozzle (22) is located on the side wall of the sealed observation chamber (32).

4. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to claim 3, characterized in that: A flow meter (23) is connected to the test tube (21), and the multi-segment test pipeline unit (20) is connected to the outlet (16) and the nozzle (22) respectively through the controllable pressure valve (24).

5. The multifunctional experimental platform for observing the flow pattern and pressure testing of extinguishing agents according to claim 4, characterized in that: The multifunctional experimental platform also includes a support platform (50), which includes a liquid storage frame (51) for supporting the liquid storage pressurization unit (10) and an observation frame (52) for supporting the flow observation unit (30), wherein the liquid storage frame (51) and the observation frame (52) are arranged in a stepped manner.

6. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to claim 5, characterized in that: The transparent sealed enclosure (31) is made of acrylic or optical glass.

7. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to claim 6, characterized in that: Support feet (53) are provided at the bottom of the liquid storage frame (51) and the observation frame (52).

8. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to claim 7, characterized in that: The camera device (43) is a high-speed camera, and the sealed observation chamber (32) is filled with transparent gel or low-pressure air (34), while the side of the sealed observation chamber (32) is also equipped with a shadowless light source (35).

9. The multifunctional experimental platform for observing the flow regime and testing the pressure of extinguishing agents according to any one of claims 1-8, characterized in that: A sealed vacuum interlayer (33) is provided on the outside of the transparent sealed box (31), which is either evacuated or filled with nitrogen.

10. A multifunctional experimental platform system for observing the flow regime and testing the pressure of extinguishing agents, characterized in that, The system has any one of the claims 1-9. The system further includes a data processing module (45), which is used to acquire data from the central control unit (41), pressure sensor (42) and camera device (43), and to perform modeling, visualization and display.

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