Multi-scene foam fire extinguishing agent test bed

Abstract

The invention provides a multi-scene foam fire extinguishing agent test bed, and relates to the technical field of fire extinguishing agent performance testing, and the multi-scene foam fire extinguishing agent test bed comprises an adjustable injection system, a weighing system, a data monitoring system and a control system. The adjustable injection system comprises an adjustable sample support, multiple types of nozzles, a liquid supply system, a gas supply system and a foaming cavity, the size of the support can be flexibly adjusted, the nozzles cover a top nozzle which is vertically downward, a side nozzle and a flexible nozzle which can be flexibly installed, and the adjustable injection system is adaptive to multiple test scenes; the liquid supply system is provided with a multi-stage pump, three liquid storage tanks and a food-grade 304 stainless steel DN25 pipeline; the data monitoring system acquires parameters through a liquid level meter and a liquid and gas mass flow meter; the control system takes a programmable logic controller as a core and is equipped with a touch control integrated industrial computer. The system can reproduce a complex fire scene, realizes accurate control of a fire extinguishing medium injection state and quantitative consumption monitoring, is high in automation degree, and improves the test efficiency and scientific research value.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing agent performance testing technology, specifically a multi-scenario foam fire extinguishing agent test bench. Background Technology

[0002] As modern industry increasingly relies on advanced materials and complex electrical systems, fire scenarios are becoming more diverse and difficult to extinguish. This urgently requires the development of new, more efficient, and environmentally friendly fire extinguishing agents. However, current methods for evaluating the performance of these new agents remain largely qualitative. Traditional, simple testing platforms, such as timed tests using handheld fire extinguishers on standard oil pan fires, not only provide a rough measurement of agent consumption but also simulate overly simplistic fire scenarios. These platforms lack high-precision online monitoring methods for instantaneous flow rates and cumulative consumption of the agents, preventing researchers from scientifically calculating key indicators such as the minimum effective extinguishing dosage and the extinguishing efficiency per unit mass of agent. This severely restricts the economic efficiency and effectiveness evaluation of the agents.

[0003] To address the issue of limited fire scenario simulation, existing technologies have developed some test benches with preliminary scenario simulation capabilities, such as altering fire source layouts by adding different combustion plates. However, these benches still have significant shortcomings in achieving precise quantitative analysis of extinguishing agent performance. Specifically, these improved devices lack independent, high-precision control of agent injection parameters, failing to dynamically adjust key parameters such as injection pressure, flow rate, and foaming ratio. This prevents research from systematically exploring the impact of these parameter changes on extinguishing mechanisms and performance. Furthermore, even in devices incorporating simple flow meters, their data acquisition systems lack integration and automation, making it difficult to synchronously transmit and record multiple real-time parameters such as flow rate, pressure, and changes in combustible mass. Consequently, they cannot support the research, selection, and performance standardization of high-performance extinguishing agents. Therefore, there is an urgent need for a comprehensive test platform capable of precisely controlling the injection state of the extinguishing medium, real-time, high-precision quantitative monitoring of agent consumption, and reproducing various complex fire scenarios. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a comprehensive foam extinguishing agent test bench capable of precisely controlling the spraying state of the extinguishing medium, real-time high-precision quantitative monitoring of agent consumption, and reproducing various complex fire scenarios.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-scenario foam fire extinguishing agent test bench includes an adjustable spray system, a weighing system, a data monitoring system, and a control system. The adjustable spray system is used to achieve multi-mode spraying of the fire extinguishing medium and adapt to test scenarios. The weighing system is used to perform real-time online measurement of the test sample. The data monitoring system is used to collect parameters such as liquid level, liquid flow rate, and gas flow rate of the fire extinguishing medium. The control system is connected to the adjustable spray system, the weighing system, and the data monitoring system respectively, and is used to receive monitoring data, control the operation of the adjustable spray system, the weighing system, and the data monitoring system, and record test data.

[0007] Preferably, the adjustable spraying system includes an adjustable sample holder, a nozzle module, a liquid supply system, and an air supply system; the nozzle module is mounted on the adjustable sample holder; the liquid supply system is connected to the nozzle module via a pipe; a foaming chamber is provided on the pipe between the liquid supply system and the nozzle module; and the air supply system is connected to the pipe between the liquid supply system and the foaming chamber via a pipe.

[0008] Preferably, the nozzle module includes a top nozzle, a side nozzle, and a flexible nozzle mounted on an adjustable sample holder; the top nozzle sprays vertically downwards; the side nozzle sprays in a direction adjustable within a pitch angle range of 0 to 45°; and the flexible nozzle is installed at a specific position on the adjustable sample holder according to usage requirements.

[0009] Preferably, the liquid supply system includes a base, a multistage pump, a first check valve, a pressure gauge, and a storage tank; the multistage pump and the storage tank are mounted on the base; the input end of the multistage pump is connected to the storage tank via a pipe, and the output end is connected to the nozzle module via a pipe; the first check valve and the pressure gauge are mounted on the pipe between the multistage pump and the foaming chamber.

[0010] Preferably, the liquid storage tank is configured with three tanks, which are used to store foam extinguishing agent, other types of special extinguishing agents and cleaning water, respectively.

[0011] Preferably, the air supply system includes an air compressor and a second check valve; the output end of the air compressor is connected to the pipeline between the liquid supply system and the foaming chamber via a pipeline; the second check valve is connected to the pipeline at the output end of the air compressor.

[0012] Preferably, the weighing system includes a stainless steel weighing platform and a weighing sensor; the stainless steel weighing platform is mounted on the adjustable sample holder; and the weighing sensor is mounted on the stainless steel weighing platform.

[0013] Preferably, the data monitoring system includes a level gauge, a liquid mass flow meter, and a gas mass flow meter; the level gauge is installed on the liquid storage tank; the liquid mass flow meter is installed on the pipeline at the output end of the multistage pump; and the gas mass flow meter is installed on the pipeline at the output end of the air compressor.

[0014] Preferably, the control system is integrated into an electrical control cabinet, with a programmable logic controller as the core, and equipped with a touch-screen integrated industrial computer as the human-machine interface.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The adjustable sample holder of the adjustable fire extinguishing spray system can flexibly adapt to test fire sources of different geometries and sizes. Combined with multi-angle and multi-mode nozzle configuration, it enables rapid reproduction of fire scenarios and flexible combination of fire extinguishing agent application strategies, providing reliable experimental conditions for systematically evaluating the performance of fire extinguishing agents under complex or special working conditions.

[0017] By adjusting the output pressure of the multi-stage pump and air compressor in the fire extinguishing spray system, combined with the weighing system 2 and the data monitoring system, the accuracy and reliability of key test data such as fire extinguishing agent consumption, pressure, flow rate, and liquid level are ensured, providing strong support for quantitative analysis.

[0018] The automated control system enables automatic control of the test process, real-time display of data, and intelligent management. It supports horizontal comparison and effect evaluation of various fire extinguishing methods such as water spray and foam on the same platform, greatly improving testing efficiency and scientific research value. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] in:

[0021] 1. Control system; 2. Side nozzle; 3. Top nozzle; 4. Adjustable sample holder; 5. Stainless steel weighing platform; 6. Second check valve; 7. Air supply system; 8. First check valve; 9. Base; 10. Multistage pump; 11. Liquid storage tank; 12. Foaming chamber. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a multi-scenario foam fire extinguishing agent test bench includes an adjustable spray system, a weighing system, a data monitoring system, and a control system 1. The adjustable spray system is used to realize multi-mode spraying of the fire extinguishing medium and adapt to test scenarios. The weighing system is used to perform real-time online measurement of the test sample. The data monitoring system is used to collect parameters such as liquid level, liquid flow rate, and gas flow rate of the fire extinguishing medium. The control system 1 is connected to the adjustable spray system, the weighing system, and the data monitoring system respectively, and is used to receive monitoring data, control the operation of the adjustable spray system, the weighing system, and the data monitoring system, and record test data.

[0024] Furthermore, the adjustable spray system includes an adjustable sample holder 4, a nozzle module, a liquid supply system, and a gas supply system 7. The nozzle module is mounted on the adjustable sample holder 4. The liquid supply system is connected to the nozzle module via a pipe. A foaming chamber 12 is provided on the pipe between the liquid supply system and the nozzle module. The gas supply system 7 is connected to the pipe between the liquid supply system and the foaming chamber 12 via a pipe. The adjustable holder is welded from carbon steel and measures approximately 2040mm (L) × 2010mm (W) × 2276.5mm (H). The adjustable holder includes a horizontal bar and a vertical bar, both of which are equipped with adjustment holes. The height and width can be adjusted by fixing with bolts. Sprayer mounting interfaces are reserved on the top and sides, allowing the top nozzle 3, side nozzle 2, and flexible nozzles to be fixed according to the needs of the testing scenario, adapting to test samples of different sizes and types.

[0025] Furthermore, the nozzle module includes a top nozzle 3, a side nozzle 2, and a flexible nozzle mounted on the adjustable sample holder 4; the top nozzle 3 sprays vertically downwards; the side nozzle 2 sprays in a pitch angle range of 0 to 45°; and the flexible nozzle is installed at a specific position on the adjustable sample holder 4 according to usage requirements.

[0026] Furthermore, the liquid supply system includes a base 9, a multistage pump 10, a first check valve 8, a pressure gauge, and a storage tank 11; the multistage pump 10 is a 25CDL2-130 model; the multistage pump 10 and the storage tank 11 are mounted on the base 9; the input end of the multistage pump 10 is connected to the storage tank 11 via a pipe, and the output end is connected to the nozzle module via a pipe; the first check valve 8 and the pressure gauge are mounted on the pipe between the multistage pump 10 and the foaming chamber 12.

[0027] Furthermore, the storage tank 11 is equipped with three tanks, which are used to store foam extinguishing agents, other types of special extinguishing agents, and cleaning water, respectively. The storage tank 11 is a cylindrical structure with a capacity of 100L. The first tank is dedicated to storing foam extinguishing agents to ensure the purity and chemical stability of the foam liquid. The second tank is used to store other types of special extinguishing agents to avoid cross-contamination between different formulations. The third tank independently stores cleaning water for periodically flushing the pipeline system to prevent residual crystals from clogging or corroding the pipeline.

[0028] Furthermore, the air supply system 7 includes an air compressor and a second check valve 6; the output end of the air compressor is connected to the pipeline between the liquid supply system and the foaming chamber 12 via a pipeline; the second check valve 6 is connected to the pipeline at the output end of the air compressor. The air flow rate reaches 250L / min.

[0029] Furthermore, the weighing system includes a stainless steel weighing platform 5 and a weighing sensor; the stainless steel weighing platform 5 is mounted on an adjustable sample holder 4; the weighing sensor is mounted on the stainless steel weighing platform 5, with a range of 0~1000kg, an accuracy class of 0.2% RO, and an output sensitivity of 2.0±0.1mv / v; it is capable of real-time online accurate measurement of the sample.

[0030] Furthermore, the data monitoring system includes a level gauge, a liquid mass flow meter, and a gas mass flow meter; the level gauge is installed on the storage tank 11; the liquid mass flow meter is installed on the pipeline at the output end of the multistage pump 10; and the gas mass flow meter is installed on the pipeline at the output end of the air compressor.

[0031] Furthermore, the control system 1 is integrated into the electrical control cabinet, with a programmable logic controller as its core, and equipped with a touch-screen integrated industrial computer as the human-machine interface.

[0032] Furthermore, the piping in this test bench uses food-grade 304 stainless steel DN25 pipes for media transportation.

[0033] Example:

[0034] The operation steps are as follows:

[0035] According to the requirements of the test scenario, adjust the height and width of the adjustable sample holder 4, place the test sample (such as a simulated flammable liquid combustion device) on the weighing platform, select the working nozzle and fix it.

[0036] As needed, inject foam extinguishing agent into the first storage tank of storage tank 11, inject other types of extinguishing agents into the second storage tank, inject sufficient cleaning water into the third storage tank, and close the inlet and outlet valves of the storage tanks.

[0037] The test parameters are set via the touch-screen computer of control system 1;

[0038] Open the return water valve of the liquid supply system to release the residual pressure in the pipeline and prevent the multistage pump 10 from starting under pressure; start the air compressor and multistage pump 10, and close the return water valve after the water pump outlet pressure stabilizes at 0.63MPa.

[0039] Turn on the air mass flow meter control switch and nozzle valve. After the flow rate of the foam extinguishing agent is precisely regulated by the liquid mass flow meter, it enters the foaming chamber 12 and mixes with the air supplied by the air mass flow meter to form a foam jet stream that evenly covers the surface of the test sample.

[0040] During the test, the weighing system monitors the change in sample weight in real time, and the data monitoring system collects the flow rate of liquid mass flow meter 32, the flow rate of air mass flow meter, the system pressure and the liquid level of storage tank 11, and transmits them to the control system 1.

[0041] The touch screen computer of control system 1 displays the waveform of each parameter in real time and automatically records the data. After the test, the air mass flow meter and nozzle valve are closed first, and then the multi-stage pump 10 is stopped. The valve of the third storage tank and the return water valve are opened, and the clean water is delivered through the liquid supply system to rinse the pipes and nozzles to prevent foam residue from clogging them.

[0042] After rinsing, turn off all equipment and export the test data through control system 1. Store the data in file formats such as Excel, Word, and PDF for easy viewing and editing.

Claims

1. A multi-scenario foam fire extinguishing agent test bench, characterized in that, It includes an adjustable spraying system, a weighing system, a data monitoring system, and a control system. The adjustable spraying system is used to achieve multi-mode spraying of the extinguishing medium and adapt to test scenarios. The weighing system is used to perform real-time online measurement of the test sample. The data monitoring system is used to collect parameters such as liquid level, liquid flow rate, and gas flow rate of the extinguishing medium. The control system is connected to the adjustable spraying system, the weighing system, and the data monitoring system respectively, and is used to receive monitoring data, control the operation of the adjustable spraying system, the weighing system, and the data monitoring system, and record test data.

2. The multi-scenario foam fire extinguishing agent test bench as described in claim 1, characterized in that, The adjustable spraying system includes an adjustable sample holder, a nozzle module, a liquid supply system, and an air supply system; the nozzle module is mounted on the adjustable sample holder; the liquid supply system is connected to the nozzle module via a pipe; a foaming chamber is provided on the pipe between the liquid supply system and the nozzle module; and the air supply system is connected to the pipe between the liquid supply system and the foaming chamber via a pipe.

3. The multi-scenario foam fire extinguishing agent test bench as described in claim 2, characterized in that, The nozzle module includes a top nozzle, a side nozzle, and a flexible nozzle mounted on an adjustable sample holder; the top nozzle sprays vertically downwards; the side nozzle sprays in a direction adjustable within a pitch angle range of 0 to 45°; and the flexible nozzle is installed at a specific position on the adjustable sample holder according to usage requirements.

4. The multi-scenario foam fire extinguishing agent test bench as described in claim 2, characterized in that, The liquid supply system includes a base, a multistage pump, a first check valve, a pressure gauge, and a storage tank; the multistage pump and the storage tank are mounted on the base; the input end of the multistage pump is connected to the storage tank via a pipe, and the output end is connected to the nozzle module via a pipe; the first check valve and the pressure gauge are mounted on the pipe between the multistage pump and the foaming chamber.

5. The multi-scenario foam fire extinguishing agent test bench as described in claim 4, characterized in that, The liquid storage tank is configured with three tanks, which are used to store foam extinguishing agent, other types of special extinguishing agents, and cleaning water, respectively.

6. The multi-scenario foam fire extinguishing agent test bench as described in claim 4, characterized in that, The air supply system includes an air compressor and a second check valve; the output end of the air compressor is connected to the pipeline between the liquid supply system and the foaming chamber via a pipeline; the second check valve is connected to the pipeline at the output end of the air compressor.

7. The multi-scenario foam fire extinguishing agent test bench as described in claim 2, characterized in that, The weighing system includes a stainless steel weighing platform and a weighing sensor; the stainless steel weighing platform is mounted on the adjustable sample holder; the weighing sensor is mounted on the stainless steel weighing platform.

8. A multi-scenario foam fire extinguishing agent test bench as described in claim 6, characterized in that, The data monitoring system includes a level gauge, a liquid mass flow meter, and a gas mass flow meter; the level gauge is installed on the liquid storage tank; the liquid mass flow meter is installed on the pipeline at the output end of the multistage pump; and the gas mass flow meter is installed on the pipeline at the output end of the air compressor.

9. A multi-scenario foam fire extinguishing agent test bench as described in claim 1, characterized in that, The control system is integrated into the electrical control cabinet, with a programmable logic controller as its core and equipped with a touch-screen industrial computer as the human-machine interface.

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