Multi-parameter coupling environment experiment platform and experiment method for compressed air foam performance research

Abstract

The invention discloses a multi-parameter coupling environment experiment platform for compressed air foam performance research and an experiment method. The multi-parameter coupling environment experiment platform comprises a simulation cabin, a combustion disc, a sampling mechanical arm, a heating assembly, a humidifying assembly, a foam performance testing system, a CAFS fire extinguishing system, a main vacuumizing pump assembly, a fine pumping stabilized pressure pump assembly, a water circulation cooling assembly and a control system. The multi-parameter coupling environment simulation experiment platform has the advantages that the multi-parameter coupling environment simulation experiment platform is built, the technical blank is filled up, extreme environment conditions are reproduced truly through cooperative work of all systems, the core pain point of lack of the multi-parameter coupling environment simulation platform at present is solved, and the experiment efficiency is improved. And an irreplaceable infrastructure is provided for deeply researching engineering parameters of a compressed air foam fire extinguishing system in an extreme environment.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing performance testing technology, specifically to a multi-parameter coupled environment experimental platform and experimental method for studying the performance of compressed air foam. Background Technology

[0002] Ultra-high voltage (UHV) power transmission technology, as the world's most advanced power transmission method, places crucial importance on the fire safety level of its stations to ensure the efficient and reliable operation of the power system. In plain environments, stationary compressed air foam (CAFS) fire suppression systems have been widely used in UHV converter stations and substations, demonstrating excellent performance in rapid fire suppression and effective fire spread control, significantly improving the fire safety level of UHV stations. However, with the further development of UHV projects, extreme environments characterized by significant differences in low temperature, low pressure, and humidity severely restrict the continued and in-depth application of CAFS systems in UHV stations, thus seriously threatening the fire safety of UHV stations in extreme environments.

[0003] In extreme environments, environmental parameters such as temperature, humidity, and pressure are coupled together. However, there is currently a lack of experimental platforms that can simulate extreme multi-parameter coupled environments, making it impossible to systematically quantify the influence of different environmental parameters on key parameters such as the generation, delivery characteristics, and fire extinguishing performance of compressed air foam. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to build a multi-parameter coupled environment simulation experimental platform.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A multi-parameter coupled environment experimental platform for studying the performance of compressed air foam includes a simulation chamber, a combustion pan, a sampling robotic arm, a heating component, a humidification component, a foam performance testing system, a CAFS fire extinguishing system, a main vacuum pump component, a fine pump pressure stabilizing pump component, a water circulation cooling component, and a control system. The simulation chamber is equipped with a combustion plate, a sampling robotic arm, a heating component, a humidification component, and a foam performance testing system. The sampling robotic arm is positioned near the combustion plate for sampling. The heating component is used to control the temperature inside the simulation chamber, and the humidification component is used to control the humidity inside the simulation chamber. The foam performance testing system includes a surface tension meter, a foam analyzer, a film-forming property testing device, and a liquid film stability testing device, which are used to test the performance of compressed air foam. The fire extinguishing end of the CAFS fire extinguishing system is located inside the simulation chamber and is positioned towards the combustion plate. The vacuum pump assembly's vacuum end is located inside the simulation chamber for rough evacuation of the air inside the simulation chamber; The vacuum pump end of the precision pump assembly is located inside the simulation chamber for precisely pumping air from inside the simulation chamber. The water circulation cooling assembly is located outside the simulation chamber to cool the main vacuum pump assembly, and the main vacuum pump assembly draws air from inside the simulation chamber into the water circulation cooling assembly for filtration. The sampling robotic arm, heating components, humidification components, foam performance testing system, CAFS fire extinguishing system, main vacuum pump components, fine pump pressure stabilizing pump components, and water circulation cooling components are all electrically connected to the control system.

[0006] This invention establishes a multi-parameter coupled environment simulation experimental platform, filling a technological gap. Through the collaborative work of various systems, it realistically reproduces extreme environmental conditions, solving the core pain point of the current lack of a multi-parameter coupled environment simulation platform. It provides an irreplaceable infrastructure for in-depth research on the engineering parameters of compressed air foam fire extinguishing systems under extreme environments.

[0007] Preferably, the simulation chamber is 5m long, 3m wide, and 3m high, and the simulation chamber is made of Q235 steel with a chamber thickness of 6mm.

[0008] Preferably, the pumping speed of the main vacuum pump assembly is 110 m / s. 3 / min, power of 132kw, rated voltage of 380V.

[0009] Preferably, the pumping speed of the fine pump pressure stabilizing pump assembly is 300m. 3 / h, power is 7.5kw, rated voltage is 380V.

[0010] Preferably, the heating component is a humidifier.

[0011] Preferably, the humidification component is a humidifier.

[0012] Preferably, the CAFS fire extinguishing system includes a compressed air foam generator, a foam delivery pipe, foam branch pipes, a fixed bracket, and foam nozzles. The compressed air foam generator is located outside the simulation chamber. The output end of the compressed air foam generator is connected to one end of the foam delivery pipe, and the other end extends into the simulation chamber and is connected to multiple sets of foam branch pipes fixed on the fixed bracket. Each set of foam branch pipes is equipped with multiple foam nozzles, and the spray ends of the foam nozzles are all directed towards the combustion plate.

[0013] Preferably, the present invention also provides an experimental method for a multi-parameter coupled environment experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different environmental pressures, comprising the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Perform the following actions under standard atmospheric pressure conditions: close the simulation chamber door by starting the control system, and simultaneously start the heating and humidification components to heat and humidify the air flowing into the simulation chamber until the temperature stabilizes at 20±0.5℃ and the humidity stabilizes at 63±3%. S3: Once the ambient temperature and humidity reach and remain stable, input the preset ambient air pressure value corresponding to the target altitude obtained in S1 into the control system. Then, the control system sends a start command to the main vacuum pump assembly and the fine pump pressure stabilizing pump assembly. First, the main vacuum pump assembly coarsely pumps the air inside the simulated chamber, and then the fine pump pressure stabilizing pump assembly finely pumps the air inside the simulated chamber to reduce the pressure value inside the chamber until the pressure value is the preset ambient air pressure value corresponding to the target altitude obtained in S1. Record the time when the pressure reaches the target. S4: The CAFS fire extinguishing system is activated by the control system to generate compressed air foam to extinguish the fire on the combustion plate. Then, the sampling robotic arm in the simulation chamber is controlled by the control system to take samples of foam from the combustion plate and place them into the surface tension meter, foam analyzer, film-forming test device and liquid film stability test device for compressed air foam performance testing. The tests include solution surface tension, foaming height, 25% liquid separation time, foaming ratio and foam extinguishing performance on transformer oil under different ambient air pressures.

[0014] Preferably, the present invention also provides an experimental method for a multi-parameter coupled environmental experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different ambient temperatures, comprising the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Perform the following actions under standard atmospheric pressure conditions: close the simulation chamber door by starting the control system and start the humidification component to humidify the air flowing into the simulation chamber until the humidity stabilizes within the range of 63±3%. At the same time, the control system sends start commands to the main vacuum pump assembly and the fine pump pressure stabilizing pump assembly. First, the main vacuum pump assembly coarsely evacuates the air inside the simulation chamber, and then the fine pump pressure stabilizing pump assembly finely evacuates the air inside the simulation chamber to stabilize the air pressure inside the simulation chamber within the range of 101.3±0.1 kPa. S3: Once the ambient humidity and air pressure reach and remain stable, input the preset ambient temperature value corresponding to the target altitude obtained by S1 into the control system. Based on the actual temperature measurement result of S1, input the preset ambient temperature value into the control system and observe the actual simulated temperature result of the simulation chamber. S4: The CAFS fire extinguishing system is activated by the control system to generate compressed air foam to extinguish the fire on the combustion plate. Then, the sampling robotic arm in the simulation chamber is controlled by the control system to take samples of foam from the combustion plate and place them into the surface tension meter, foam analyzer, film-forming test device and liquid film stability test device for compressed air foam performance testing. The tests include solution surface tension, foaming height, 25% liquid separation time, foaming ratio and foam extinguishing performance on transformer oil under different ambient temperatures.

[0015] Preferably, the present invention also provides an experimental method for a multi-parameter coupled environmental experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different environmental humidity conditions, comprising the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Perform the following actions under standard atmospheric pressure conditions: close the simulation chamber door by starting the control system and start the heating components to heat the air flowing into the simulation chamber until the temperature stabilizes within the range of 20±0.5℃. At the same time, the control system sends start commands to the main vacuum pump assembly and the fine pump pressure stabilizing pump assembly. First, the main vacuum pump assembly coarsely pumps the air inside the simulation chamber, and then the fine pump pressure stabilizing pump assembly finely pumps the air inside the simulation chamber to stabilize the air pressure inside the simulation chamber within the range of 101.3±0.1 kPa. S3: Once the ambient temperature and air pressure reach and remain stable, input the preset ambient temperature value corresponding to the target altitude obtained by S1 into the control system. Based on the actual humidity measurement results of S1, input the preset ambient humidity value into the control system and observe the actual simulated humidity results of the simulation chamber. S4: The CAFS fire extinguishing system is activated by the control system to generate compressed air foam to extinguish the fire on the combustion plate. Then, the sampling robotic arm in the simulation chamber is controlled by the control system to take samples of foam from the combustion plate and place them into a surface tension meter, a foam analyzer, a film-forming test device, and a liquid film stability test device for compressed air foam performance testing. The tests include solution surface tension, foaming height, 25% liquid separation time, foaming ratio, and foam extinguishing performance on transformer oil under different ambient humidity conditions.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. A multi-parameter coupled environment simulation experimental platform was built, filling a technological gap. Through the collaborative work of various systems, extreme environmental conditions were realistically reproduced, solving the core pain point of the current lack of a multi-parameter coupled environment simulation platform. It provides an irreplaceable infrastructure for in-depth research on the engineering parameters of compressed air foam fire extinguishing systems under extreme environments.

[0017] 2. The simulation chamber has rapid pressure regulation capability and high control precision, ensuring the efficiency and repeatability of the experiment. It is both practical and safe, and can accommodate real fire extinguishing equipment for full-scale testing. It also allows personnel to enter and exit, making it easy to set up, observe and maintain, which greatly improves the convenience of the experiment and the authenticity of the data.

[0018] 3. By replacing manual operation with a sampling robotic arm, automation and safety are greatly improved, ensuring efficient and reliable experiments. The risks of personnel entering low-pressure, potentially toxic, or high-temperature experimental environments are completely avoided. At the same time, human intervention is reduced, and the standardization, repeatability, and automation of the experimental process are improved. It is particularly suitable for long-term or continuous experiments under hazardous conditions.

[0019] 4. The CAFS fire extinguishing system features fully adjustable parameters and high-precision output, enabling precise simulation and quantification of the impact of different engineering parameters on foam performance. The flow rate of the mixed liquid, the gas-liquid ratio, and the foam-liquid mixing ratio can all be independently and precisely adjusted and integrated into a mobile platform. This provides a highly flexible and engineering-practice-oriented standardized experimental platform for studying the generation, transport, and fire extinguishing performance of compressed air foam under extreme environments, directly supporting the optimized design and standardized application of fire extinguishing systems.

[0020] 5. The system employs a combined configuration of a main vacuum pump assembly and a fine-pump pressure stabilizing pump assembly, balancing pumping efficiency with pressure stability accuracy. The combined use of heating and humidification components ensures wide-range, high-precision temperature and humidity control. A water-circulating cooling system provides cooling for the main vacuum pump assembly, effectively handling the high heat load during simulated fires, ensuring the continuous and stable operation of the core power unit, and filtering the air extracted from the simulation chamber to prevent smoke pollution of the external environment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the foam performance testing system in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the CAFS fire extinguishing system in Embodiment 1 of the present invention; Figure 4 This is a diagram showing the simulation results of the atmospheric pressure in the simulated chamber in Embodiment 2 of the present invention; Figure 5 Figure 2 shows the experimental results of the change in foam liquid film thickness under different ambient air pressures in Embodiment 2 of the present invention. Figure 6 Figure 2 shows the experimental results of foam separation volume change under different ambient air pressures in Embodiment 2 of the present invention. Figure 7 Figure 2 shows the performance test results of the air compressor under different ambient air pressures in Embodiment 2 of the present invention. Figure 8 Figure 2 shows the performance test results of the water pump under different ambient air pressures in Embodiment 2 of the present invention. Figure 9 This is a simulation result of the ambient temperature in the simulation chamber according to Embodiment 3 of the present invention; Figure 10 This is a simulation result of the ambient humidity in the simulation chamber according to Embodiment 4 of the present invention. Detailed Implementation

[0022] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0025] Example 1 See Figures 1 to 3 This embodiment discloses a multi-parameter coupled environment experimental platform for studying the performance of compressed air foam, including a simulation chamber 1, a combustion plate 2, a sampling robotic arm 3, a main vacuum pump assembly 4, a fine pump pressure stabilizing pump assembly 5, a heating assembly (not shown in the figure), a humidification assembly (not shown in the figure), a foam performance testing system 6, a CAFS fire extinguishing system 7, a water circulation cooling assembly 8, and a control system 9.

[0026] In this embodiment, the simulation chamber 1 is 5m long, 3m wide, and 3m high. The simulation chamber is made of Q235 steel, and the inner wall lining is made of 304 stainless steel. The chamber body is 6mm thick and uses a 100×50m rectangular tube frame, which can bear a load of up to 3000kg / m. 2 The deck features a double door (inlet size 2000×900mm) on one side and a φ250mm observation window. There are also two φ250mm observation windows on the deck itself.

[0027] Furthermore, the simulation cabin 1 allows personnel to enter and exit. Multiple flange interfaces are reserved on the top and sides of the simulation cabin 1, and interfaces with different functions can be added according to actual needs.

[0028] The simulation chamber 1 is equipped with a combustion plate 2, a sampling robotic arm 3, a heating component, a humidification component, and a foam performance testing system 6.

[0029] The sampling robotic arm 3 is positioned close to the combustion plate 2 and electrically connected to the control system 9. The sampling is controlled by the control system 9. The sampling robotic arm 3 is a vertical multi-joint automatic sampling robotic arm with 6-axis high-precision motion degrees of freedom, a weight of 44kg, and a maximum load of 8kg.

[0030] Specifically, the motion range of the six axes of the sampling robotic arm 3 is -170°~170°, -135°~100°, -62°~180°, -185°~185°, -125°~125°, and -360°~360°, respectively. The maximum speeds of the six axes are 400° / s, 340° / s, 370° / s, 535° / s, 411° / s, and 698° / s, respectively. The operating environment temperature of the sampling robotic arm 3 is 0-45℃, the ambient humidity is 20%-80%RH, and the ambient vibration is no greater than 0.5G. The allowable torque of the sampling robotic arm 3 is 9.5 N*m, and the allowable moment of inertia is 0.16 Kg*m. 2 The repeatability is ±0.02mm, the maximum coverage is 712mm, and the installation methods are upright, inverted, or side-mounted.

[0031] The heating component is used to control the internal temperature of the simulation chamber 1 and is electrically connected to the control system 9. The heating is controlled by the control system 9, and the heating is specifically electric, with a designed power of 6 kW. In this embodiment, the heating component is any one of the following heaters: SUREHEAT® MAX air heater, WBG 6 universal air heater, or Watlow modular duct heater.

[0032] The humidification component is used to control the humidity inside the simulation chamber 1 and is electrically connected to the control system 9. The humidification is controlled by the control system 9, specifically using dry steam humidification, with an evaporation rate of 3-5 kg / h. In this embodiment, the humidification component is any one of the following: Condair PS M200L S1 humidifier, Spirax Sarco S1 jet steam humidifier, or Fisair Diphusair FSH steam jet humidifier.

[0033] See Figure 2The foam performance testing system 6 includes a surface tension meter 61, a foam analyzer 62, a film-forming property testing device 63, and a liquid film stability testing device 64, which are electrically connected to the control system. It is used to test the performance of compressed air foam. The surface tension meter 61, the foam analyzer 62, the film-forming property testing device 63, and the liquid film stability testing device 64 are all set close to the sampling robotic arm 3, so that the above instruments are within the coverage area of ​​the sampling robotic arm 3.

[0034] See Figure 3 The extinguishing end of the CAFS fire extinguishing system 7 is located inside the simulation chamber 1 and faces the combustion plate 2. Specifically, the CAFS fire extinguishing system 7 includes a compressed air foam generator 71, a foam delivery pipe 72, foam branch pipes 73, a fixed bracket 74, and foam nozzles (not shown in the figure). The compressed air foam generator 71 is located outside the simulation chamber 1 and is electrically connected to the control system 9. The output end of the compressed air foam generator 71 is connected to one end of the foam delivery pipe 72. The other end of the foam delivery pipe 72 extends into the simulation chamber 1 and is connected to multiple sets of foam branch pipes 73 fixed on the fixed bracket 74. Each set of foam branch pipes 73 is equipped with multiple foam nozzles, and the spray ends of the foam nozzles are all oriented towards the combustion plate 2.

[0035] The compressed air foam generator 71 consists of an air compressor and air tank, a water pump and a liquid tank. The output pressure of the compressed air foam generator 71 is not less than 0.4 MPa, and the flow rate ranges from 0.5 to 20 L / min. It outputs compressed air foam with an air-liquid ratio error of ±1 under operating conditions such as 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, and 1:10. Furthermore, the compressed air foam generator 71 employs a water pump positive pressure injection foam liquid proportioning unit, carrying foam liquid with a mixing ratio of 1% or 3%. The compressed air foam generator 71 is mounted on a movable platform and can be moved selectively by manual or motor drive.

[0036] The main vacuum pump assembly 4, electrically connected to the control system 9, has its evacuation end located inside the simulation chamber for rough evacuation of the air inside the chamber. Its rough evacuation operation is controlled by the control system 9, and the pumping speed of the main vacuum pump assembly 4 is 110 m³ / s. 3 / min, power of 132kw, rated voltage of 380V.

[0037] The vacuum pump assembly 5, electrically connected to the control system 9, has its vacuum end located inside the simulation chamber for precisely evacuating the air inside the chamber. Its precise vacuum operation is controlled by the control system 9, and the pumping speed of the precise vacuum pump assembly 5 is 300 m³ / s. 3 / h, power of 7.5kw, rated voltage of 380V, and ultimate pressure of 0.5mbar.

[0038] The water circulation cooling component 8, which is electrically connected to the control system 9, is located outside the simulation chamber and is used to provide cooling water to the main vacuum pump component 4 for cooling. At the same time, the main vacuum pump component 4 draws the air inside the simulation chamber 1 into the water circulation cooling component 8 for filtration to prevent flue gas from polluting the external environment.

[0039] Furthermore, the water circulation cooling component 8 is equipped with a 4kW cooling tower and a 7.5kW circulation pump, with a rated heat dissipation capacity of 10m³. 3 / h.

[0040] In this embodiment, the control system is controlled by a PLC console, specifically including a display system, a control input system, a voice interaction system, and a video monitoring system. It can realize the control of environmental parameters such as pressure, temperature, and humidity, as well as the integrated control of the sampling robotic arm 3, heating component, humidification component, foam performance testing system 6, CAFS fire extinguishing system 7, main vacuum pump component 4, fine pump pressure stabilizing pump component 5, and water circulation cooling component 8.

[0041] Example 2 This embodiment also discloses an experimental method for a multi-parameter coupled environment experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different environmental pressures, including the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Referring to standard GB 311.1-1997 "Insulation Coordination of High Voltage Transmission and Transformation Equipment", the following actions are performed under standard atmospheric pressure conditions: the control system 9 is activated to close the door of simulation chamber 1, and the heating and humidification components are activated simultaneously to heat and humidify the air flowing into simulation chamber 1 until the temperature stabilizes at 20±0.5℃ and the humidity stabilizes at 63±3%. S3: Once the ambient temperature and humidity reach and remain stable, input the preset ambient air pressure value corresponding to the target altitude obtained in S1 into the control system 9. Then, the control system 9 sends a start command to the main vacuum pump assembly 4 and the fine pump pressure stabilizing pump assembly 5. First, the main vacuum pump assembly 4 coarsely pumps the air inside the simulation chamber 1, and then the fine pump pressure stabilizing pump assembly 5 finely pumps the air inside the simulation chamber 1 to reduce the pressure value inside the chamber until the pressure value is the preset ambient air pressure value corresponding to the target altitude obtained in S1. Observe the actual simulated air pressure result of the simulation chamber, calculate the simulation error = (|simulated value - measured value| / measured value) × 100%, and record the pressure reaching the target value (the time when the system pressure reaches the preset simulated value). S4: The compressed air foam generator 71 is activated by the control system 9 to generate compressed air foam for fire extinguishing on the combustion pan 2. Specifically, standard 3% aqueous film-forming foam (AFFF) is diluted at a volume ratio of VAFFF:V water = 3:97 to obtain a foam extinguishing agent solution. Then, the sampling robotic arm 3 in the simulation chamber 1 is controlled by the control system 9 to sample the foam from the combustion pan 2 and place it into the surface tension meter 61, foam analyzer 62, film-forming property testing device 63, and liquid film stability testing device 64 for foam performance testing. The tests measure the solution surface tension, foaming height, 25% separation time, foaming ratio, and foam extinguishing performance against transformer oil under different ambient air pressures. In addition, the system performance, such as the performance of the air compressor and water pump, can also be tested under different ambient air pressures.

[0042] The results of the environmental pressure simulation are shown in Table 1: Table 1

[0043] Simulation results under different environmental pressures show that the simulation error is 0.3%-0.66%, all less than 1%, and the pressure reach-standard time is 16-18 minutes. The environmental pressure simulation results are good. Figure 4 As shown.

[0044] The test results of foam performance and foam fire extinguishing performance under different ambient air pressures are shown in Table 2: Table 2

[0045] In addition, changes in foam liquid film thickness and foam separation volume, such as Figure 5 and Figure 6 As shown in the figure, the performance test results of the compressed air foam fire extinguishing system are as follows: Figure 7 and Figure 8 As shown.

[0046] Example 3 This embodiment also discloses an experimental method for a multi-parameter coupled environment experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different ambient temperatures, including the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Referring to standard GB 311.1-1997 "Insulation Coordination of High Voltage Transmission and Transformation Equipment", the following actions are performed under standard atmospheric pressure conditions: The control system 9 is activated to close the door of the simulation chamber 1 and start the humidification component to humidify the air flowing into the simulation chamber 1 until the humidity stabilizes within the range of 63±3%. At the same time, the control system 9 sends a start command to the main vacuum pump assembly 4 and the fine pump pressure stabilizing pump assembly 5. First, the main vacuum pump assembly 4 coarsely pumps the air inside the simulation chamber 1, and then the fine pump pressure stabilizing pump assembly 5 finely pumps the air inside the simulation chamber 1 to stabilize the air pressure inside the simulation chamber 1 within the range of 101.3±0.1 kPa. S3: Once the ambient humidity and air pressure reach and remain stable, input the preset ambient temperature value corresponding to the target altitude obtained in S1 into the control system 9. Based on the actual temperature measurement result in S1, input the preset ambient temperature value into the control system 9, observe the actual simulated temperature result of the simulation chamber, and calculate the simulation error = (|simulated value - measured value| / measured value) × 100%; S4: The compressed air foam generator 71 is activated by the control system 9 to generate compressed air foam for fire extinguishing on the combustion pan 2. Specifically, standard 3% aqueous film-forming foam (AFFF) is diluted at a volume ratio of VAFFF:V water = 3:97 to obtain a foam extinguishing agent solution. Then, the sampling robotic arm 3 in the simulation chamber 1 is controlled by the control system 9 to sample the foam from the combustion pan 2 and place it into the surface tension meter 61, foam analyzer 62, film-forming property testing device 63, and liquid film stability testing device 64 for foam performance testing. The tests measure the solution surface tension, foaming height, 25% separation time, foaming ratio, and foam extinguishing performance on transformer oil under different ambient temperatures. In addition, the system performance, such as the performance of the air compressor and water pump, can also be tested under different ambient air pressures.

[0047] The results of the ambient temperature simulation are shown in Table 3: Table 3

[0048] From Table 3 and Figure 9 Simulation results for different ambient temperatures show that the simulation error is 0.3%-0.58%, all less than 1%, indicating good simulation results for ambient temperatures.

[0049] The test results of foam performance and foam fire extinguishing performance under different ambient temperatures are shown in Table 4: Table 4

[0050] Example 4 This embodiment also discloses an experimental method for a multi-parameter coupled environment experimental platform for studying the performance of compressed air foam, used to simulate the performance of compressed air foam under different ambient humidity conditions, including the following steps: S1: Based on the actual distribution of the UHV projects, obtain the measured environmental parameters of temperature, air pressure, and humidity at four altitudes: 43m, 1492m, 2400m, and 3629m. S2: Referring to standard GB 311.1-1997 "Insulation Coordination of High Voltage Transmission and Transformation Equipment", the following actions are performed under standard atmospheric pressure conditions: The control system 9 is activated to close the door of the simulation chamber 1 and start the heating components to heat the air flowing into the simulation chamber 1 until the temperature stabilizes within the range of 20±0.5℃. At the same time, the control system 9 sends start commands to the main vacuum pump assembly 4 and the fine pump pressure stabilizing pump assembly 5. First, the main vacuum pump assembly 4 coarsely pumps the air inside the simulation chamber 1, and then the fine pump pressure stabilizing pump assembly 5 finely pumps the air inside the simulation chamber 1 to stabilize the air pressure inside the simulation chamber 1 within the range of 101.3±0.1 kPa. S3: Once the ambient temperature and air pressure reach and remain stable, input the preset ambient temperature value corresponding to the target altitude obtained by S1 into the control system 9. Based on the actual humidity measurement result of S1, input the preset ambient humidity value into the control system, observe the actual simulated humidity result of the simulation chamber, and calculate the simulation error = (|simulated value - measured value| / measured value) × 100%; S4: The compressed air foam generator 71 is activated by the control system 9 to generate compressed air foam for fire extinguishing on the combustion pan 2. Specifically, standard 3% aqueous film-forming foam (AFFF) is diluted at a volume ratio of VAFFF:V water = 3:97 to obtain a foam extinguishing agent solution. Then, the sampling robotic arm 3 in the simulation chamber 1 is controlled by the control system 9 to sample the foam from the combustion pan 2 and place it into the surface tension meter 61, foam analyzer 62, film-forming property testing device 63, and liquid film stability testing device 64 for foam performance testing. The tests measure the solution surface tension, foaming height, 25% separation time, foaming ratio, and foam extinguishing performance against transformer oil under different ambient humidity conditions. In addition, the system performance, such as the performance of the air compressor and water pump, can also be tested under different ambient air pressures.

[0051] The simulation results of environmental humidity are shown in Table 5: Table 5

[0052] From Table 5 and Figure 10 Simulation results for different environmental humidity levels show that the simulation error is 0.29%-0.65%, all less than 1%, indicating good environmental humidity simulation results.

[0053] Table 6 shows the test results of foam performance and foam fire extinguishing performance under different ambient humidity conditions: Table 6

[0054] In summary, the multi-parameter coupled environment experimental platform for studying the performance of compressed air foam disclosed in this invention has the following advantages: 1. A multi-parameter coupled environment simulation experimental platform was built, filling a technological gap. Through the collaborative work of various systems, extreme environmental conditions were realistically reproduced, solving the core pain point of the current lack of a multi-parameter coupled environment simulation platform. It provides an irreplaceable infrastructure for in-depth research on the engineering parameters of compressed air foam fire extinguishing systems under extreme environments.

[0055] 2. The simulation chamber 2 has the ability to quickly adjust pressure and has high control precision, which ensures the efficiency and repeatability of the experiment. It is both practical and safe. It can accommodate real fire extinguishing equipment for full-scale testing and can also allow personnel to enter and exit, which is convenient for setup, observation and maintenance, greatly improving the convenience of the experiment and the authenticity of the data.

[0056] 3. By replacing manual operation with sampling robotic arm 3, automation and safety are greatly improved, ensuring efficient and reliable experiments. It completely avoids the risk of personnel entering low-pressure, potentially toxic or high-temperature experimental environments, while reducing human intervention and improving the standardization, repeatability and automation of experimental procedures. It is particularly suitable for long-term or continuous experiments under hazardous conditions.

[0057] 4. The CAFS fire extinguishing system 7 features fully adjustable parameters and high-precision output, which can accurately simulate and quantify the impact of different engineering parameters on foam performance. The flow rate of the mixed liquid, the gas-liquid ratio, and the foam-liquid mixing ratio can all be independently and accurately adjusted and integrated into a mobile platform. This provides a highly flexible and engineering-practice-oriented standardized experimental platform for studying the generation, transport, and fire extinguishing performance of compressed air foam under extreme environments, directly supporting the optimized design and standardized application of fire extinguishing systems.

[0058] 5. The system employs a composite configuration of the main vacuum pump assembly 4 and the fine pump pressure stabilizing pump assembly 5, balancing pumping efficiency with pressure stability accuracy. The combined use of heating and humidification components ensures a wide range and high precision in temperature and humidity regulation. The water circulation cooling assembly 8 provides cooling for the main vacuum pump assembly 4, effectively handling the high heat load during simulated fires, ensuring the continuous and stable operation of the core power unit, and filtering the air extracted from the simulation chamber 1 to prevent smoke pollution of the external environment.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A multi-parameter coupling environment experiment platform for compressed air foam performance research, characterized in that: The simulation cabin, the combustion disc, the sampling mechanical arm, the heating assembly, the humidifying assembly, the foam performance test system, the CAFS fire extinguishing system, the main vacuum pump assembly, the fine vacuum pump assembly, the water circulation cooling assembly and the control system are included. The combustion disc, the sampling mechanical arm, the heating assembly, the humidifying assembly and the foam performance test system are arranged in the simulation cabin. The sampling mechanical arm is arranged close to the combustion disc for sampling. The heating assembly is used for controlling the temperature inside the simulation cabin. The humidifying assembly is used for controlling the humidity inside the simulation cabin. The foam performance test system includes a surface tension meter, a foam analyzer, a film forming test device and a liquid film stability test device and is used for compressed air foam performance. The fire extinguishing end of the CAFS fire extinguishing system is arranged in the simulation cabin and faces the combustion disc.

2. The multi-parameter coupling environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The vacuum end of the main vacuum pump assembly is arranged in the simulation cabin for rough pumping of the air inside the simulation cabin.

3. The multi-parameter coupling environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The main vacuum pump assembly has a pumping speed of 110 m 3 / min, a power of 132 kw and a rated voltage of 380 V.

4. The multi-parameter coupled environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The extraction rate of the fine extraction pressure stabilizing pump assembly is 300 m 3 / h, power is 7.5 kw, and rated voltage is 380 V.

5. The multi-parameter coupled environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The vacuum end of the fine vacuum pump assembly is arranged in the simulation cabin for fine pumping of the air inside the simulation cabin.

6. The multi-parameter coupled environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The water circulation cooling assembly is arranged outside the simulation cabin for cooling of the main vacuum pump assembly.

7. The multi-parameter coupled environmental experimental platform for compressed air foam performance research according to claim 1, characterized in that: The sampling mechanical arm, the heating assembly, the humidifying assembly, the foam performance test system, the CAFS fire extinguishing system, the main vacuum pump assembly, the fine vacuum pump assembly and the water circulation cooling assembly are electrically connected with the control system.

8. The experimental method of the multi-parameter coupled environmental experimental platform for compressed air foam performance research according to any one of claims 1 to 7, characterized in that: The simulation cabin has a length of 5m, a width of 3m and a height of 3m. The heating assembly is a humidifier. The humidifying assembly is a humidifier. The CAFS fire extinguishing system includes a compressed air foam generating device, a foam delivery pipe, foam branch pipes, a fixing support and foam nozzles. The compressed air foam generating device is arranged outside the simulation cabin. The output end of the compressed air foam generating device is connected with one end of the foam delivery pipe. The other end of the foam delivery pipe extends into the simulation cabin and is in communication with a plurality of foam branch pipes fixed on the fixing support. A plurality of foam nozzles are arranged on each foam branch pipe. The spray ends of the foam nozzles all face the combustion disc. The simulation cabin is used for simulating compressed air foam performance under different environmental pressures. S1: According to the actual distribution of extra-high voltage projects, the measured temperature, pressure and humidity environmental parameters at altitudes of 43m, 1492m, 2400m and 3629m are obtained. S2: The following actions are performed under the condition of standard atmospheric pressure: the cabin door of the simulation cabin is closed by starting the control system, and the heating assembly and the humidifying assembly are started synchronously to heat and humidify the air flowing into the simulation cabin until the temperature is stabilized at 20±0.5℃ and the humidity is stabilized at 63±3%. S3: When the environmental temperature and humidity reach and remain stable, the preset environmental pressure value corresponding to the target altitude obtained in S1 is input into the control system, and then the control system sends a starting instruction to the main vacuum pump assembly and the fine vacuum pump assembly. The air inside the simulation cabin is first rough pumped by the main vacuum pump assembly and then fine pumped by the fine vacuum pump assembly to reduce the pressure value in the cabin until the pressure value is the preset environmental pressure value corresponding to the target altitude obtained in S1, and the time when the pressure reaches the standard is recorded. S4: Start the CAFS fire extinguishing system to generate compressed air foam to extinguish the burning disc through the control system, then control the sampling mechanical arm in the simulation cabin to sample the foam sample in the burning disc through the control system, and place it in the surface tension instrument, foam analyzer, film forming test device and liquid film stability test equipment respectively to test the performance of compressed air foam, including solution surface tension, foaming height, 25% liquid separation time, foaming multiple and foam extinguishing performance on transformer oil under different environmental pressures.

9. The experimental method of the multi-parameter coupled environmental experimental platform for compressed air foam performance research according to any one of claims 1 to 7, characterized in that: For simulating the performance of compressed air foam under different environmental temperatures, the following steps are included: S1: According to the actual distribution of UHV projects, obtain the measured temperature, pressure and humidity environmental parameters at altitudes of 43m, 1492m, 2400m and 3629m; S2: Perform the following actions under standard atmospheric pressure conditions: close the cabin door of the simulation cabin by starting the control system, and start the humidifying assembly to humidify the air flowing into the simulation cabin until the humidity is stabilized in the range of 63±3%, and the control system sends a start instruction to the main vacuum pump assembly and the fine vacuum pump assembly, first coarsely pumping the air in the simulation cabin through the main vacuum pump assembly, and then finely pumping the air in the simulation cabin through the fine vacuum pump assembly to stabilize the internal pressure of the simulation cabin in the range of 101.3±0.1kPa; S3: After the environmental humidity and pressure are stabilized, input the preset environmental temperature value corresponding to the target altitude obtained in S1 into the control system, input the preset environmental temperature value in the control system according to the actual measured temperature result in S1, and observe the actual simulation temperature result of the simulation cabin; S4: Start the CAFS fire extinguishing system to generate compressed air foam to extinguish the burning disc through the control system, then control the sampling mechanical arm in the simulation cabin to sample the foam sample in the burning disc through the control system, and place it in the surface tension instrument, foam analyzer, film forming test device and liquid film stability test equipment respectively to test the performance of compressed air foam, including solution surface tension, foaming height, 25% liquid separation time, foaming multiple and foam extinguishing performance on transformer oil under different environmental pressures.

10. The experimental method of the multi-parameter coupled environmental experimental platform for compressed air foam performance research according to any one of claims 1 to 7, characterized in that: For simulating the performance of compressed air foam under different environmental temperatures, the following steps are included: S1: According to the actual distribution of UHV projects, obtain the measured temperature, pressure and humidity environmental parameters at altitudes of 43m, 1492m, 2400m and 3629m; S2: Perform the following actions under standard atmospheric pressure conditions: close the cabin door of the simulation cabin by starting the control system, and start the humidifying assembly to humidify the air flowing into the simulation cabin until the humidity is stabilized in the range of 63±3%, and the control system sends a start instruction to the main vacuum pump assembly and the fine vacuum pump assembly, first coarsely pumping the air in the simulation cabin through the main vacuum pump assembly, and then finely pumping the air in the simulation cabin through the fine vacuum pump assembly to stabilize the internal pressure of the simulation cabin in the range of 101.3±0.1kPa; S3: After the ambient temperature and pressure reach and remain stable, input the preset ambient temperature value corresponding to the target altitude obtained in S1 in the control system, input the preset ambient humidity value in the control system according to the actual measured humidity result in S1, and observe the actual simulation humidity result of the simulation cabin; S4: Start the CAFS fire extinguishing system to generate compressed air foam to extinguish the burning disc, then control the sampling mechanical arm in the simulation cabin to sample the foam sample in the burning disc through the control system, and respectively place it into the surface tension instrument, foam analyzer, film forming property testing device and liquid film stability testing equipment to test the performance of the compressed air foam, and test the solution surface tension, foaming height, 25% liquid separation time, foaming multiple and foam fire extinguishing performance on transformer oil under different ambient humidity.

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