Water-based foam extinguishing agent performance test integrated device and test method

Abstract

The application discloses a water-based foam extinguishing agent performance test integrated device and a test method, which comprises a foaming device, a glass foam pipe and a metal foam pipe arranged in the foaming device, an operation terminal and an air compression device connected with the foaming device; the upper part of the glass foam pipe is provided with an opening, the opening is connected with a foam tank through a pipeline, and a feeding pump and a valve F1 are further arranged between the foam tank and the opening; the upper part of the metal foam pipe is provided with a first opening and a second opening, the first opening is connected with the foam tank through a pipeline provided with a valve F3, and the foam in the foam tank flows into the glass foam pipe and the metal foam pipe through the valve F1 and the valve F3 respectively; and the second opening is connected with a foam gun through a pipeline. The application simplifies the test equipment, concentrates three foam performances (foaming, stable foaming and extinguishing performance) in one device, and can measure the foaming multiple, liquid separation time and extinguishing time and other parameters of the foam extinguishing agent in sequence through simple parameter setting and valve switching.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foam extinguishing performance test, in particular to a water-based foam extinguishing agent performance test integrated device and test method. BACKGROUND

[0002] Water-based foam extinguishing agent is a commonly used high-efficiency extinguishing agent for extinguishing flammable liquid and general solid fire. The extinguishing agent generates a condensed foam floating layer on the surface of the liquid, which plays a role of suffocation and cooling. Foam extinguishing agent is divided into chemical foam, air foam, fluoroprotein foam, water film foam and anti-soluble foam, etc., and has a wide range of applications. In order to exert the high-efficiency extinguishing performance of foam extinguishing agent, it needs to meet certain indicators, including anti-freezing, melting, sediment, specific fluidity, pH value, surface tension, foaming multiple, liquid separation time, burning resistance time, and extinguishing time. Among them, the foaming performance (foaming multiple), the stable foam performance (liquid separation time) and the extinguishing performance (burning resistance time, extinguishing time) are the core indicators for evaluating water-based foam extinguishing agent. When foam extinguishing agent is applied in different fields, it is also necessary to consider whether the core indicators meet the requirements. At present, the standards related to foam extinguishing agent in the international field mainly include the International Organization for Standardization (ISO) standard and the National Fire Protection Association (NFPA) standard. In addition, the standards for foam extinguishing agent in different fields are also different, such as the standards of International Civil Aviation Organization (ICAO), European Union, United States, etc. in the civil aviation field. The standard classification of foam extinguishing agent in China is not perfect, and at present, it mainly depends on the national standard GB 15308-2006 "Foam Extinguishing Agent" implemented on July 1, 2007, which does not specify the indicators in different fields in detail. However, in view of the requirements of the international standards for foam extinguishing agent, China should also refine the indicators of foam extinguishing agent, especially the three core indicators.

[0003] Different types of foam extinguishing agents have different foaming, stable foam and extinguishing performances, and their application fields and application scenarios are also different. Therefore, when selecting foam extinguishing agent, it is particularly important to quickly and conveniently determine or verify whether the core indicators meet the extinguishing requirements. At present, the three core indicators of foam extinguishing agent need to be determined respectively, and the national standard of China also needs to be determined separately, and the test process is relatively complex and time-consuming.

[0004] The patent literature technology with the patent number 202011464327.6 and the patent name of a novel foam extinguishing agent foaming performance testing device and method in the prior art mainly tests the foaming performance and the foam stability of the foam extinguishing agent, and does not involve the test of the extinguishing performance, and each performance index is tested by a single device, the testing devices are numerous, a plurality of device operations need to be mastered, the device occupies a larger area, the device cost is higher, the test efficiency is low, and the test time is long. Therefore, a testing device and method capable of quickly and simply testing or evaluating three core indexes of the water-based foam extinguishing agent are urgently needed. The present application is a water-based foam extinguishing agent device integrating the foaming, foam stability and extinguishing performance tests. How to quickly and simply test or evaluate the three core indexes of the water-based foam extinguishing agent has important value. SUMMARY

[0005] To solve the problems in the prior art, the present application provides a water-based foam extinguishing agent performance test integrated device and testing method. The present application integrates the foaming, foam stability and extinguishing performance tests, concentrates the three foam performance (foaming, foam stability and extinguishing performance) tests on one device, and can obtain the foaming multiple, liquid separation time and extinguishing time of the foam extinguishing agent by simple parameter setting and valve switching. The one-time test of the three performances is realized by simple button switching, and the problems mentioned in the background art are solved.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a water-based foam extinguishing agent performance test integrated device, characterized in that the device comprises a foaming device, a glass foam pipe and a metal foam pipe arranged in the foaming device, an operation terminal and an air compression device connected with the foaming device.

[0007] The upper part of the metal foam pipe is provided with a first opening and a second opening, the first opening is connected with the foam tank through a pipeline provided with a valve F3, the foam of the foam tank flows into the glass foam pipe and the metal foam pipe through the valve F1 and the valve F3 respectively, and the second opening is connected with the foam gun through a pipeline.

[0008] Preferably, a foam liquid overflow pipe with a plurality of overflow ports is arranged below the first opening in the metal foam pipe, and a turbine is further arranged in the metal foam pipe. The turbine comprises turbine blades and a turbine shaft, the turbine blades and the turbine shaft are integrally formed, the turbine shaft is rotationally connected with the upper and lower interfaces of the metal foam pipe, and the turbine shaft can be driven to rotate by the air compression device and drive the turbine to rotate.

[0009] Preferably, a plurality of electrically conductive interfaces are arranged on the glass foam pipe, and the electrically conductive interfaces are connected with the foaming device through electrically conductive wires.

[0010] Preferably, the bottom of the glass foam tube is provided with a foaming net, and different sizes of foam are prepared by replacing foaming nets with different mesh sizes.

[0011] Preferably, the bottom of the foam gun is provided with a foam gun support for fixing the foam gun.

[0012] Preferably, the device further comprises an oil pan arranged at the outlet position of the foam gun.

[0013] In addition, to achieve the above-mentioned purpose, the application further provides a test method of the water-based foam extinguishing agent performance test integrated device, the test method comprises:

[0014] Step 1, start the foaming device, and open the test software program interface on the operation terminal;

[0015] Step 2, load the sample to be tested into the foam tank, open the feeding pump, and the foam flows into the glass foam tube and the metal foam tube through valves F1 and F3 respectively, after the feeding is completed, open valve F2 and start the air compression device, and start the inflation and foaming, and the foam stability performance test;

[0016] Step 3, when the foam liquid flowing into the glass foam tube reaches a certain volume, F1 is automatically closed, the glass foam tube automatically tests the foaming multiple and the liquid separation time parameters, and the foaming multiple, 25% liquid separation time and 50% liquid separation time data are directly read on the operation terminal;

[0017] Step 4, open valves F3 and F4 at the same time, the foam liquid flowing into the metal foam tube is injected into the air through the air compression device, and then drives the turbine to rotate and foam; 2cm thick water layer is placed in the oil pan, 4cm thick aviation kerosene is placed on the water layer, the oil pan is ignited to make the aviation kerosene pre-burn for 60s, the valve opening degree is controlled to maintain the flow rate of 2.5L / min, the foam gun is opened, and the foaming liquid is sprayed to the oil pan for extinguishing by the foam gun, and the foaming device continues to supply foam for 120±2s;

[0018] Step 5, record the 90% fire control time, 99% fire control time, fire extinguishing time and burn resistance time, and complete the test.

[0019] Preferably, the foam gun spraying extinguishing is divided into liquid-on spraying extinguishing and liquid-under spraying extinguishing.

[0020] The beneficial effects of the present application are: through technical improvement, the fire extinguishing performance component is combined with the foaming and stabilizing component, the performance test of three aspects can be considered, and the differences of the fire extinguishing performance (fire control time, fire extinguishing time, and fire resistance time) of the water-based foam fire extinguishing agent on the liquid and during liquid injection can be tested, so that the performance advantages and disadvantages of the water-based foam fire extinguishing agent can be simply, quickly and effectively evaluated, and the present application can be applied to scientific research work, third-party self-detection and the like. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A test device structure schematic diagram for liquid injection of the present application embodiment 1 is shown in the figure.

[0022] Figure 2 A test device structure schematic diagram for liquid injection of the present application embodiment 2 is shown in the figure.

[0023] In the figure, 1 is an operation terminal, 2 is a foam tank, 3 is a feeding pump, 4 is an air compression device, 5 is a foaming device, 6 is a glass foam pipe, 7 is an electrically conductive interface, 8 is a foaming net, 9 is a metal foam pipe, 10 is a foam liquid overflow pipe, 11 is a turbine, 12 is a foam gun, 13 is a foam gun support, and 14 is an oil pan. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0025] A water-based foam fire extinguishing agent performance test integrated device, as shown in the figure, comprises a foaming device 5, a glass foam pipe 6 and a metal foam pipe 9 arranged inside the foaming device, an operation terminal 1 and an air compression device 4 connected with the foaming device. Figure 1 The upper part of the glass foam pipe 6 is provided with an opening, the opening is connected with a foam tank 2 through a pipeline, and a feeding pump 3 and a valve F1 are further arranged between the foam tank 2 and the opening.

[0026] Further, the upper part of the metal foam pipe 9 is provided with a first opening and a second opening, the first opening is connected with the foam tank 2 through a pipeline provided with a valve F3, the foam of the foam tank 2 flows into the glass foam pipe 6 and the metal foam pipe 9 through the valve F1 and the valve F3 (valve opening degree is controllable, i.e. flow is controllable) respectively, and the second opening is connected with a foam gun 12 through a pipeline.

[0027] Further, the metal foam pipe 9 is provided with a foam overflow pipe 10 with multiple overflow ports below the first opening, and a turbine 11 is also arranged in the metal foam pipe 9, the turbine 11 includes turbine blades and a turbine shaft, the turbine blades are integrally formed with the turbine shaft, the turbine shaft is rotationally connected with the upper and lower interfaces of the metal foam pipe, and the turbine shaft can be driven to rotate by the air compression device 4 to drive the turbine to rotate. The operation terminal can be an external computer.

[0028] Further, the glass foam pipe 6 is provided with multiple electrical lead interfaces 7, and the electrical lead interfaces 7 are connected with the foaming device 5 through electrical leads. The bottom of the glass foam pipe 6 is provided with a foaming net 8, and different sizes of foam can be prepared by replacing foaming nets with different mesh sizes.

[0029] Further, the bottom of the foam gun 12 is provided with a foam gun support 13, and the foam gun support is used for fixing the foam gun.

[0030] Further, the device also includes an oil pan 14, and the oil pan is arranged at the outlet position of the foam gun. The foam flow led out by the metal foam pipe sprays the burning flame in the oil pan 14 to extinguish the flame.

[0031] Sufficient foam extinguishing agent samples to be tested are prepared, the specifications of the foaming net 8 are confirmed and installed, the caliber of the foam gun 12 is confirmed and the pipeline is connected, and the size of the oil pan 14 and the type of oil product contained in the oil pan are confirmed. The specifications of the foaming net include φ10, φ20, φ50, φ100 mm, etc., the caliber of the foam gun includes φ30, φ60, φ100 mm, etc., and the size of the oil pan includes φ20, φ40, φ60, φ80 cm, etc.

[0032] During the experiment, the foaming device 5 and the external computer are sequentially turned on, the test software program interface in the computer is opened, the sample to be tested is loaded into the foam tank 2, the valves F1 and F2 are opened, the charging pump 3 and the air compression device 4 are turned on, the system automatically performs the inflation and foaming and the stability performance test, and the test results are displayed on the computer end. The foaming multiple, 25% liquid separation time and 50% liquid separation time data can be directly read. After the foaming and stability performance test is completed, the fire extinguishing performance test can also be performed simultaneously. After the oil pan is ignited for 60 seconds, the valves F3 and F4 are opened, the foam gun continuously sprays foam extinguishing agent, and the 90% fire control time (the time experienced from the start of spraying foam extinguishing agent to the extinguishing of 90% of the oil pan flame), the 99% fire control time (the time experienced from the start of spraying foam extinguishing agent to the extinguishing of 99% of the oil pan flame), the fire extinguishing time (the time experienced from the start of spraying foam extinguishing agent to the complete extinguishing of the oil pan flame), and the anti-burning time (the time experienced from the start of the ignition pot in the oil pan to the complete destruction of the foam in the oil pan and the achievement of the free burning state of the flame according to the experimental conditions specified in the national standard GB15308-2006) are manually recorded.

[0033] There are two ways of liquid above injection and liquid below injection for fire extinguishing performance test. Liquid below injection is a way of applying foam extinguishing agent below the surface of flammable liquid, making it rise and spread on the surface of flammable liquid to form a fire extinguishing foam layer. For testing the difference of fire extinguishing efficiency of foam extinguishing agent in different injection ways when extinguishing B class fire, the fire extinguishing performance parameters (90% control fire time, 99% control fire time, fire extinguishing time and 1% anti-burning time) can be tested by liquid above injection and liquid below injection respectively.

[0034] Example 1

[0035] An integrated test device is used as shown in Figure 1 The extinguishing method is liquid above injection. According to the different critical micelle concentration values (CMC) of the samples to be tested, solutions with a concentration of 1.2-1.5 times the CMC value of the samples are prepared. For example, for a four-carbon chain fluorocarbon surfactant-based foam extinguishing agent, a 10L, 20mmol / L solution to be tested is prepared. Turn on the test device switch and the air compression device. The foam nozzle diameter is φ50, the foam gun caliber is φ30, the oil pan size is φ40, the liquid above injection method is used. After preparation, add the solution to be tested to the foam tank, open the valves F1 and F2, and the system automatically performs the foaming and foam stability performance test according to the settings. The test time is about 30-60min. The experimental results show that the foaming multiple is 8.2, the 25% liquid separation time is 806s, and the 50% liquid separation time is 1624s. After the foaming and foam stability performance test is completed, a 2cm thick water layer is placed in the oil pan, a 4cm thick aviation kerosene is placed on the water layer, the oil pan is ignited to pre-burn the aviation kerosene for 60s, then the valves F3 and F4 are opened, the flow rate is set to 2.5L / min, the foam gun is started, the foaming device continues to supply foam for 120±2s, and the time taken for the foam gun to start spraying foam and the oil pan flame to be extinguished is recorded by a stopwatch, which is 59s, i.e. the fire extinguishing time is 59s.

[0036] Example 2

[0037] An integrated test device is used as shown in Figure 2The test device is shown to adopt a liquid injection mode, and a fluorocarbon surfactant type foam extinguishing agent based on a six-carbon chain is tested. The test device is configured to 10 L and 15 mmol / L of the test liquid. The test device switch is turned on, the air compression device is turned on, the foam mesh diameter is selected to be φ50, the foam gun caliber is φ30, the oil pan size is φ40, the liquid injection mode is adopted, the test liquid is added to the foam tank after preparation, the valves F1 and F2 are opened, the system automatically performs the foaming and foam stability performance test according to the setting, and the test time is about 30-60 min. The experimental results show that the foaming multiple is 7.8, the 25% liquid separation time is 885 s, and the 50% liquid separation time is 1852 s. After the foaming and foam stability performance test is completed, a 2 cm thick water layer is placed in the oil pan, a 4 cm thick aviation kerosene is placed on the water layer, the oil pan is ignited to pre-burn the aviation kerosene for 60 s, then the feeding valve is opened, the valve opening degree is controlled to maintain a flow rate of 2.5 L / min, the foam gun is opened to extinguish the fire, the foaming device continues to supply foam for 120±2 s, and the time from the start of the foam gun to the reduction of the flame height to 0.3-0.4 m is recorded by a stopwatch, that is, the 90% fire control time is 37 s, and the time from the start of the foam gun to the extinguishing of the oil pan fire is recorded as 42 s, that is, the fire extinguishing time is 42 s. After the foam supply is completed, the flame in the fire-resistant tank will continue to burn until the foam layer in the oil pan appears a suspended flame, and the time interval is recorded as 185 s, that is, the 1% fire-resistant time is 185 s.

[0038] The test device is simplified, three foam performance (foaming, foam stability and fire extinguishing performance) tests are concentrated in one device, and the foaming multiple, liquid separation time and fire extinguishing time of the foam extinguishing agent and other parameters can be measured in sequence by simple parameter setting and valve switching.

[0039] Although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A test method for an integrated device for testing the performance of water-based foam fire extinguishing agents, characterized in that, The device includes an oil pan (14), a foaming device (5), a glass foam tube (6) and a metal foam tube (9) installed inside the foaming device, an operating terminal (1) connected to the foaming device, and an air compressor (4); the upper part of the glass foam tube (6) is provided with an opening, which is connected to the foam tank (2) through a pipeline, and a feeding pump (3) and a valve F1 are also provided between the foam tank (2) and the opening; the oil pan is located at the outlet of the foam gun; The upper part of the metal foam tube (9) is provided with a first opening and a second opening. The first opening is connected to the foam tank (2) through a pipe with valve F3. The foam in the foam tank (2) flows into the glass foam tube (6) and the metal foam tube (9) through valves F1 and F3 respectively. The second opening is connected to the foam gun (12) through a pipe. The air compressor (4) is connected to the glass foam tube (6) through a pipe with valve F2 and to the metal foam tube (9) through a pipe with valve F4. The testing method for the integrated performance testing device for water-based foam fire extinguishing agents includes: Step 1: Start the foaming device (5) and open the test software program interface on the operation terminal (1); Step 2: Load the sample to be tested into the foam tank (2), turn on the feeding pump (3), and the foam flows into the glass foam tube (6) and the metal foam tube (9) through valves F1 and F3 respectively. After the feeding is completed, open valve F2 and start the air compressor (4) to start the inflation, foaming and foam stabilization performance test. Step 3: When the foam liquid flowing into the glass foam tube (6) reaches a certain volume, F1 is automatically turned off. The glass foam tube (6) automatically tests the foaming ratio and liquid separation time parameters. The foaming ratio, 25% liquid separation time and 50% liquid separation time data are directly read on the operation terminal. Step 4: Simultaneously open valves F3 and F4. The foam liquid flowing into the metal foam pipe (9) is injected with air by the air compressor device (4) and drives the turbine to rotate and foam. Put a 2cm thick water layer into the oil pan (14), and put a 4cm thick aviation kerosene layer on the water layer. Ignite the oil pan to pre-ignite the aviation kerosene for 60s. Control the valve opening to maintain a flow rate of 2.5L / min. Turn on the foam gun (12). The foam liquid is sprayed into the oil pan through the foam gun to extinguish the fire. The foaming device (5) continuously supplies foam for 120±2s. Step 5: Record the 90% fire control time, 99% fire control time, fire extinguishing time, and fire resistance time to complete the test.

2. The testing method of the integrated device for testing the performance of water-based foam fire extinguishing agents according to claim 1, characterized in that: The metal foam tube (9) is provided with a foam liquid overflow pipe (10) with multiple overflow ports located directly below the first opening. The metal foam tube (9) is also provided with a turbine (11). The turbine (11) includes turbine blades and a vortex rod. The turbine blades and the vortex rod are integrally formed. The vortex rod is rotatably connected to the upper and lower interfaces of the metal foam tube. The vortex rod can be driven to rotate by the air compression device (4) and drive the turbine to rotate.

3. The test method of the integrated device for testing the performance of water-based foam fire extinguishing agents according to claim 1, characterized in that: The glass foam tube (6) is provided with several electrical conductivity interfaces (7), which are connected to the foaming device (5) through electrical conductors.

4. The test method of the integrated device for testing the performance of water-based foam fire extinguishing agents according to claim 1, characterized in that: The bottom of the glass foam tube (6) is provided with a foaming net (8), and foams of different sizes can be prepared by changing the foaming net with different mesh sizes.

5. The test method of the integrated device for testing the performance of water-based foam fire extinguishing agents according to claim 1, characterized in that: The foam gun (12) is provided with a foam gun bracket (13) at the bottom, which is used to fix the foam gun.

6. The test method of the integrated device for testing the performance of water-based foam fire extinguishing agents according to claim 1, characterized in that: The foam gun spray fire extinguishing method is divided into above-liquid spray fire extinguishing and below-liquid spray fire extinguishing.

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