Device and method for testing fire extinguishing performance of water additive type forest fire extinguishing agent

Abstract

The invention discloses a fire extinguishing performance testing device and method for a water additive type forest fire extinguishing agent, and aims to provide a testing device and method capable of quickly and conveniently screening a suitable fire extinguishing additive. The test device comprises a test box body, a fire source model assembly, a fire extinguishing agent quantitative supply assembly, a fire extinguishing agent release assembly and a measurement and control assembly. The fire source model assembly simulates a real fire source, the fire extinguishing agent quantitative supply assembly and the fire extinguishing agent release assembly ensure accurate release of a fire extinguishing agent, and the measurement and control assembly monitors the fire source and environmental parameters in real time. The testing method comprises the steps of preparing a wood crib, weighing a fire extinguishing agent to be tested, igniting the wood crib, starting the measurement and control system, extinguishing fire, recording and analyzing data and the like. The testing device and the testing method can efficiently and scientifically evaluate the performance of the water additive type forest fire extinguishing agent, and have the characteristics of simplicity and convenience in operation, high adaptability and high safety.

Description

Technical Field

[0001] The invention relates to a fire-fighting test device, in particular to a water-additive type forest fire-extinguishing agent fire-extinguishing performance test device and a test method. Background Art

[0002] Water additive forest fire extinguishing agent is a water-based fire extinguishing agent that changes the properties of water by adding specific additives to water, thereby enhancing its fire extinguishing ability. This type of fire extinguishing agent is mainly suitable for fighting forest fires. At present, the test of water-based fire extinguishing agents usually follows the test method for Class A fire extinguishing performance specified in the national standard "Water-based Fire Extinguishing Agents" GB 17835. This method requires that the fire extinguishing agent be filled in a portable fire extinguisher for testing, and the size of the wood pile required for the test is large, at least 1A level, that is, the size is 500mm×500mm×480mm (length×width×height), and it is made up of 72 pine wood strips of 40mm×40mm×500mm in size stacked in a specific way. This method is costly and complicated to operate, and it is difficult to quickly screen the main additives when conducting research on the formulation of water additive forest fire extinguishing agents. In addition, if a handheld ordinary sprayer is used to spray the fire extinguishing agent for a fire extinguishing test, the amount of fire extinguishing agent sprayed is difficult to quantify and is greatly affected by human operating factors, which lacks scientificity.

[0003] Therefore, the challenge faced by those skilled in the art is how to provide a water additive forest fire extinguishing agent fire extinguishing performance test device and establish a test method for quantitatively evaluating the effectiveness of fire extinguishing agent additives so as to quickly and conveniently screen suitable fire extinguishing additives. Summary of the invention

[0004] The purpose of the present invention is to provide a water additive type forest fire extinguishing agent fire extinguishing performance testing device and testing method.

[0005] To achieve the above object, the present invention is implemented according to the following technical solutions:

[0006] The fire extinguishing performance testing device of the water additive type forest fire extinguishing agent of the present invention comprises a test box, a fire source model component, a fire extinguishing agent quantitative supply component, a fire extinguishing agent release component and a measurement and control component. The fire source model component is arranged in the middle section of the test box, the release end of the fire extinguishing agent release component is located above or to the side of the fire source model component, the liquid supply end of the fire extinguishing agent quantitative supply component is connected to the liquid inlet end of the fire extinguishing agent release component, and the detection end of the measurement and control component is arranged in the test box and close to the fire source model component.

[0007] The fire source model assembly includes a test water tank, a combustion bracket, a metal mesh, and a wood pile. The lower end of the combustion bracket is located in the middle of the test water tank, the metal mesh is arranged at the upper end of the combustion bracket, and the wood pile is arranged on the metal mesh. The test water tank is located in the middle section of the test box body, the fire extinguishing agent release assembly is located above or to the side of the wood pile, and the detection end of the measurement and control assembly is located at the lower end of the test water tank and on the wood pile.

[0008] The fire extinguishing agent quantitative supply component includes a fire extinguishing agent storage box, a water pump, a liquid level meter, and a flow meter. The fire extinguishing agent storage box stores fire extinguishing agent, the outlet of the fire extinguishing agent storage box is connected to the inlet of the water pump, the outlet of the water pump is connected to the inlet of the fire extinguishing agent release component, the liquid level meter is arranged on the outside of the fire extinguishing agent storage box and is connected to the inside of the fire extinguishing agent storage box, and the flow meter is arranged on the pipeline between the outlet of the water pump and the inlet of the fire extinguishing agent release component.

[0009] The fire extinguishing agent release assembly includes a lifting water supply pipe, a water supply pipe fixing frame, a fire extinguishing agent side nozzle, and a fire extinguishing agent top nozzle. One end of the lifting water supply pipe is a telescopic pipe structure. One side of the lifting water supply pipe is fixed to the inner wall of the test box through the water supply pipe fixing frame. The water supply pipe fixing frame and the lifting water supply pipe can be loosened and fixed. The outlet of the lifting water supply pipe is connected to the inlet of the fire extinguishing agent side nozzle or the fire extinguishing agent top nozzle. The outlet of the fire extinguishing agent side nozzle is located on one side of the woodpile, and the outlet of the fire extinguishing agent top nozzle is located above the woodpile.

[0010] The outlets of the fire extinguishing agent side nozzle and the fire extinguishing agent top nozzle are connected with nozzles, and the nozzles include one or more of conical nozzles, wide-angle nozzles, direct current nozzles, and atomizing nozzles. When connecting multiple or multiple nozzles, they are connected through a water distributor.

[0011] The measurement and control component includes a weighing device, a temperature acquisition system, an automatic igniter, an infrared thermal imager, and a camera. The temperature acquisition system has multiple temperature acquisition terminals distributed in multiple gap positions on the woodpile. The weighing device is arranged at the lower end of the test water storage tank, the automatic igniter is arranged in the woodpile, and the infrared thermal imager and the camera are used to collect temperature change images and actual images in the test box.

[0012] The testing method of the water additive type forest fire extinguishing agent fire extinguishing performance testing device comprises the following steps:

[0013] S1 prepares a woodpile and places it in a constant temperature and humidity chamber, and uses a wood moisture tester to test its moisture content. By adjusting the environmental conditions, the moisture content of the wood strips in the woodpile is controlled at 10%-14%;

[0014] S2 weighs the fire extinguishing agent to be tested with a mass of Q0 and puts it into the fire extinguishing agent storage box;

[0015] S3 Take a wood pile with moisture content that meets the requirements, weigh it and record its mass, which is the initial mass M0 of the wood pile;

[0016] S4 soaks the wood pile evenly with ignition liquid such as ethanol or n-heptane, with a soaking height of 2 cm and a soaking time of 5-10 minutes, takes out and weighs the mass of the wood pile, which is recorded as M1;

[0017] S5 places the woodpile on the combustion support, installs the temperature acquisition system and automatic igniter of the measurement and control components, and places the electronic igniter in the gap between the wood strips of the first layer of the woodpile;

[0018] S6 starts the weighing device, and starts data collection after zeroing. The real-time mass is recorded as M, and its absolute value can be calculated according to the following formula: |M|=M1-M0(1-φ), where φ is the weight loss rate of the wood pile, which can be set in the range of 20%-80%;

[0019] S7 starts the temperature acquisition system, infrared thermal imager and video camera to start recording;

[0020] S8 ignites the woodpile through an electronic igniter. At this time, the mass of the woodpile gradually decreases, and M is displayed as a negative value;

[0021] When the weight loss rate φ of the wood pile reaches the set value, the water pump is started to inject water or spray fire extinguishing, and the pre-combustion time t0 is recorded. The water pump flow is adjusted to meet the set water injection rate q i Or spray rate q s Water injection rate q i and spray rate q s The setting range is 30g / min-1000g / min;

[0022] S10 When the flame is extinguished and the temperature at each measuring point is lower than 50°C, turn off the water pump, and the weighing system, temperature data acquisition system, infrared thermal imager and camera continue to record for 5 minutes before turning off and saving the corresponding data;

[0023] S11 Weigh and record the mass M of the wood pile after fire extinguishing e , the mass Q of the remaining fire extinguishing agent in the fire extinguishing agent storage tank 6 and the pipeline r 、Test water tank receiving fire extinguishing agent quality Q u ;

[0024] S12 is calculated using the following formula:

[0025] The total mass of fire extinguishing agent released is Q = Q0-Q r g,

[0026] Effective fire extinguishing agent dosage Q e =QQu g,

[0027] Fire extinguishing efficiency

[0028] Fire extinguishing time t e The time is the time from the start of fire extinguishing to the time when the open flame is extinguished and all measured temperatures are below 50°C, which is determined by comprehensive temperature data and image data.

[0029] The beneficial effects of the present invention are:

[0030] The present invention is a water additive type forest fire extinguishing agent fire extinguishing performance test device and test method. Compared with the prior art, the present invention improves the use efficiency of the fire extinguishing agent and reduces the cost by accurately controlling the amount of fire extinguishing agent released and the spraying method. By quantitatively evaluating the effectiveness of fire extinguishing agent additives, a scientific evaluation of the performance of the fire extinguishing agent is achieved, and the accuracy of the research is improved. The device is compact in design, easy to operate, and easy to quickly assemble and disassemble, and is suitable for fire extinguishing performance tests in different environments. The present invention can adjust the supply amount and spray rate of the fire extinguishing agent according to different test requirements, and adapt to different fire extinguishing agent formulas and fire extinguishing conditions. By simulating a real fire environment, the risks in actual operations are reduced and the safety of testers is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0032] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0033] Figure 3 It is a schematic diagram of the other side structure of the interior of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the top sprinkler installed in the present invention;

[0035] Figure 5 It is a schematic diagram of the external structure of the present invention;

[0036] Figure 6 It is a temperature variation curve diagram of the experimental process of the present invention;

[0037] Figure 7 It is a weight change curve diagram of the experimental process of the present invention;

[0038] Figure 8 It is an image of the experimental process of the present invention.

[0039] In the figure: test box 1, test water storage tank 2, combustion bracket 3, metal mesh 4, wood pile 5, fire extinguishing agent storage box 6, water pump 7, liquid level meter 8, flow meter 9, lifting water supply pipe 10, water supply pipe fixing frame 11, fire extinguishing agent side nozzle 12, fire extinguishing agent top nozzle 13, weighing device 14, exhaust fan 15. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0041] like Figure 1-5 As shown: the fire extinguishing performance testing device of the water additive type forest fire extinguishing agent of the present invention comprises a test box 1, a fire source model component, a fire extinguishing agent quantitative supply component, a fire extinguishing agent release component and a measurement and control component, wherein the fire source model component is arranged in the middle section of the test box 1, the release end of the fire extinguishing agent release component is located above or to the side of the fire source model component, the liquid supply end of the fire extinguishing agent quantitative supply component is connected to the liquid inlet end of the fire extinguishing agent release component, and the detection end of the measurement and control component is arranged in the test box 1 and close to the fire source model component.

[0042] The fire source model assembly includes a test water tank 2, a combustion bracket 3, a metal mesh 4, and a wood pile 5. The lower end of the combustion bracket 3 is located in the middle of the test water tank 2, the metal mesh 4 is arranged at the upper end of the combustion bracket 3, and the wood pile 5 is arranged on the metal mesh 4. The test water tank 2 is located in the middle section of the test box 1, the fire extinguishing agent release assembly is located above or to the side of the wood pile 5, and the detection end of the measurement and control assembly is located at the lower end of the test water tank 2 and on the wood pile 5.

[0043] The fire extinguishing agent quantitative supply component includes a fire extinguishing agent storage tank 6, a water pump 7, a liquid level meter 8, and a flow meter 9. The fire extinguishing agent storage tank 6 stores fire extinguishing agent, the outlet of the fire extinguishing agent storage tank 6 is connected to the inlet of the water pump 7, the outlet of the water pump 7 is connected to the inlet of the fire extinguishing agent release component, the liquid level meter 8 is arranged on the outside of the fire extinguishing agent storage tank 6 and is connected to the inside of the fire extinguishing agent storage tank 6, and the flow meter 9 is arranged on the pipeline between the outlet of the water pump 7 and the inlet of the fire extinguishing agent release component.

[0044] The fire extinguishing agent release assembly includes a lifting water supply pipe 10, a water supply pipe fixing frame 11, a fire extinguishing agent side nozzle 12, and a fire extinguishing agent top nozzle 13. One end of the lifting water supply pipe 10 is a telescopic pipe structure. One side of the lifting water supply pipe 10 is fixed to the inner wall of the test box 1 through the water supply pipe fixing frame 11. The water supply pipe fixing frame 11 and the lifting water supply pipe 10 can be loosened and fixed. The outlet of the lifting water supply pipe 10 is connected to the inlet of the fire extinguishing agent side nozzle 12 or the fire extinguishing agent top nozzle 13. The outlet of the fire extinguishing agent side nozzle 12 is located on one side of the woodpile 5, and the outlet of the fire extinguishing agent top nozzle 13 is located above the woodpile 5.

[0045] The outlets of the fire extinguishing agent side nozzle 12 and the fire extinguishing agent top nozzle 13 are connected with nozzles, which include one or more of conical nozzles, wide-angle nozzles, direct current nozzles, and atomizing nozzles. When connecting multiple or multiple nozzles, they are connected through a water distributor.

[0046] The measurement and control component includes a weighing device 14, a temperature acquisition system, an automatic igniter, an infrared thermal imager, and a camera. The temperature acquisition system has multiple temperature acquisition terminals, which are distributed in multiple gap positions on the woodpile 5. The weighing device 14 is arranged at the lower end of the test water storage tank 2, and the automatic igniter is arranged in the woodpile 5. The infrared thermal imager and the camera are used to collect temperature change images and actual images in the test box 1.

[0047] The testing method of the water additive type forest fire extinguishing agent fire extinguishing performance testing device comprises the following steps:

[0048] S1 prepares a woodpile 5 and places it in a constant temperature and humidity chamber, and uses a wood moisture tester to test its moisture content, and controls the moisture content of the wood strips of the woodpile 5 to be between 10% and 14% by adjusting the environmental state;

[0049] S2 weighs the fire extinguishing agent to be tested with a mass of Q0 and puts it into the fire extinguishing agent storage box 6;

[0050] S3 takes a wood pile 5 whose moisture content meets the requirements, weighs and records its mass, which is the initial mass M0 of the wood pile 5;

[0051] S4 soaks the wood pile evenly with ignition liquid such as ethanol or n-heptane, with a soaking height of 2 cm and a soaking time of 5-10 minutes, takes out and weighs the mass of the wood pile, which is recorded as M1;

[0052] S5: placing the woodpile 5 on the combustion support 3, installing the temperature acquisition system and automatic igniter of the measurement and control components, and placing the electronic igniter in the gap between the first layer of wood strips of the woodpile 5;

[0053] S6 starts the weighing device 14, and starts data collection after zeroing. The real-time mass is recorded as M, and its absolute value can be calculated according to the following formula: |M|=M1-M0(1-φ), where φ is the weight loss rate of the wood pile, which can be set in the range of 20%-80%;

[0054] S7 starts the temperature acquisition system, infrared thermal imager and video camera to start recording;

[0055] S8 ignites the wood pile 5 through the electronic igniter, at which time the mass of the wood pile 5 gradually decreases, and M is displayed as a negative value;

[0056] S9 When the weight loss rate φ of the wood pile 5 reaches the set value, the water pump 7 is started to inject water or spray fire extinguishing, and the pre-combustion time t0 is recorded. The flow rate of the water pump 7 is adjusted to meet the set water injection rate q i Or spray rate q s Water injection rate q i and spray rate q s The setting range is 30g / min-1000g / min;

[0057] S10 When the flame is extinguished and the temperature of each measuring point is lower than 50°C, the water pump 7 is turned off, and the weighing system, temperature data acquisition system, infrared thermal imager and camera continue to record for 5 minutes and then turn off, and save the corresponding data;

[0058] S11 Weigh and record the mass M of the wood pile 5 after the fire is extinguished e , the mass Q of the remaining fire extinguishing agent in the fire extinguishing agent storage tank 6 and the pipeline r 、Test water tank 2 receives fire extinguishing agent mass Q u ;

[0059] S12 is calculated using the following formula:

[0060] The total mass of fire extinguishing agent released is Q = Q0-Q r g,

[0061] Effective fire extinguishing agent dosage Q e =QQ u g,

[0062] Fire extinguishing efficiency

[0063] Fire extinguishing time t e The time is the time from the start of fire extinguishing to the time when the open flame is extinguished and all measured temperatures are below 50°C, which is determined by comprehensive temperature data and image data.

[0064] Example:

[0065] The main body of the test box 1 is a metal frame structure, and the enclosure is made of metal plates, which are divided into two layers, and the bottom is provided with movable casters. The upper layer of the test box 1 is used as a combustion chamber, and an openable tempered glass observation window is set on the front. A smoke exhaust fan 15 is set on the top of the combustion chamber to exhaust the test smoke. Grille openings are set at the lower part of the left and right sides of the combustion chamber for air intake to ensure sufficient oxygen supply for combustion in the combustion chamber. The lower layer of the combustion test box assembly is not provided with a bottom plate, which is used to place the quantitative supply assembly of the fire extinguishing agent.

[0066] The woodpile 5 is composed of 50 pine wood strips, the moisture content of the wood strips is controlled to be 10-14%, the cross section of the wood strips is a square of (10±1) mm, and 5 strips are stacked in 10 layers, and each layer of wood strips is stacked at 90° with the next layer. The wood strips on each layer are arranged at the same spacing to form a square with the same width and length of the wood strips, and the wood strips on the outer edge of the woodpile 5 are nailed together. The combustion bracket 3 is a stainless steel square bracket, and a stainless steel metal mesh 4 is applied on it, and the mesh hole size is 6mm×6mm. The water pump 7 can adjust the power supply voltage through the voltage regulator to adjust the water flow.

[0067] The side nozzle 12 or the top nozzle 13 of the fire extinguishing agent is installed on the upper part or the side of the wood pile 5, and the nozzle faces the wood pile 5. The fire is extinguished by water injection or spraying. In the water injection method, the nozzle is set close to the upper surface of the simulated building block 5, and the fire extinguishing agent is added to the surface of the simulated building block 5 at a certain rate. In the spraying method, the nozzle is set at a certain distance from the wood pile 5, and is set above or on the side of the wood pile 5. The fire extinguishing agent is sprayed out in atomized form to form a cone-shaped mist to cover the simulated building block 5.

[0068] The temperature acquisition system consists of a laptop computer, a temperature data acquisition module and a thermocouple. The thermocouple probes are set inside and above the woodpile 5. The measuring points inside the woodpile 5 are located in the gaps between the first, fifth and ninth layers of wood strips.

[0069] The weighing system is composed of a laptop computer, a weight data acquisition module, and a weighing device 14. It is used to measure the mass change of the wood pile 5 during the test. The test water storage tank 2 is used to receive the useless water lost during the fire extinguishing process. The automatic igniter is composed of a DC power supply and an electronic ignition head, and is used to ignite the wood pile 5.

[0070] 1) Weigh a water-additive forest fire extinguishing agent with a mass of Q0 = 2000 g and put it into the fire extinguishing agent storage box 6;

[0071] 2) Take a wood pile 5, test its moisture content to be 11.2%, initial mass M0 = 248.63g, soak the first and second layers of wood strips in ethanol for 10 minutes and weigh them, mass M1 = 268.03g;

[0072] 3) The fire extinguishing agent supply assembly is adjusted to the standby state, and the fire extinguishing agent release assembly adopts a water mist nozzle in a top spraying mode;

[0073] 4) Place the woodpile 5 on the combustion support 3 and install the thermocouple and the electronic ignition head;

[0074] 5) Start the temperature acquisition system to start collecting temperature data, start the weighing device 14 and start collecting weight data after zeroing;

[0075] 6) starting the DC power supply to supply power to the electronic ignition head to ignite the wood pile 5;

[0076] 7) When the weight loss rate φ of the wood pile 5 reaches 75%, fire extinguishing is started, that is, the real-time mass |M|=M1-M0(1-φ)=268.03g-248.63g×(1-75%)=205.9g, and the pre-combustion time t0=297.7s;

[0077] 8) Adjust the input voltage of the water pump 7 to make the spray rate q s 600g / min; 9) When the open flame is observed to be extinguished and the temperatures of each measuring point collected by the temperature collection system are all below 50°C, turn off the water pump 7;

[0078] 10) Weigh and record the mass M of the wood pile after the fire is extinguished e =164.06g, the mass of the remaining fire extinguishing agent in the fire extinguishing agent storage tank 6 and the pipeline is Q r =1281.16g, the mass of fire extinguishing agent received by the test water storage tank 2 is Q u =303.3g;

[0079] 11) After the temperature acquisition system and weighing device 14 continue to record for 5 minutes, save and generate data charts;

[0080] 12) Total mass of fire extinguishing agent released Q = Q0-Q r (g)=2000g-1281.16g=718.84g,

[0081] Effective fire extinguishing agent dosage Q e =QQ u (g)=718.84g-303.3g=415.54g,

[0082] Fire extinguishing efficiency

[0083] Fire extinguishing time t e =401-330=71s

[0084] The temperature change curve obtained during the experiment is as follows Figure 6 As shown; the weight change curve is as follows Figure 7 The experimental process is shown in Figure 8 shown.

[0085] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A water additive type forest fire extinguishing agent fire extinguishing performance testing device, characterized in that: The invention comprises a test box (1), a fire source model component, a fire extinguishing agent quantitative supply component, a fire extinguishing agent release component and a measurement and control component, wherein the fire source model component is arranged in the middle section of the test box (1), the release end of the fire extinguishing agent release component is located above or to the side of the fire source model component, the liquid supply end of the fire extinguishing agent quantitative supply component is connected to the liquid inlet end of the fire extinguishing agent release component, and the detection end of the measurement and control component is arranged in the test box (1) and close to the fire source model component.

2. The water additive type forest fire extinguishing agent fire extinguishing performance testing device according to claim 1, characterized in that: The fire source model assembly comprises a test water storage tank (2), a combustion support (3), a metal mesh (4), and a wood pile (5); the lower end of the combustion support (3) is located in the middle of the test water storage tank (2); the metal mesh (4) is arranged at the upper end of the combustion support (3); the wood pile (5) is arranged on the metal mesh (4); the test water storage tank (2) is located in the middle section of the test box (1); the fire extinguishing agent release assembly is located above or to the side of the wood pile (5); and the detection end of the measurement and control assembly is located at the lower end of the test water storage tank (2) and on the wood pile (5).

3. The water additive type forest fire extinguishing agent fire extinguishing performance testing device according to claim 2, characterized in that: The fire extinguishing agent quantitative supply component comprises a fire extinguishing agent storage box (6), a water pump (7), a liquid level meter (8), and a flow meter (9); the fire extinguishing agent storage box (6) stores fire extinguishing agent; the outlet of the fire extinguishing agent storage box (6) is connected to the inlet of the water pump (7); the outlet of the water pump (7) is connected to the inlet of the fire extinguishing agent release component; the liquid level meter (8) is arranged on the outside of the fire extinguishing agent storage box (6) and is connected to the inside of the fire extinguishing agent storage box (6); the flow meter (9) is arranged on the pipeline between the outlet of the water pump (7) and the inlet of the fire extinguishing agent release component.

4. The fire extinguishing performance testing device of water additive type forest fire extinguishing agent according to claim 3 is characterized in that: The fire extinguishing agent release assembly comprises a lifting water supply pipe (10), a water supply pipe fixing frame (11), a fire extinguishing agent side nozzle (12), and a fire extinguishing agent top nozzle (13); one end of the lifting water supply pipe (10) is a telescopic pipe structure; one side of the lifting water supply pipe (10) is fixed to the inner wall of the test box (1) through the water supply pipe fixing frame (11); the water supply pipe fixing frame (11) and the lifting water supply pipe (10) can be loosened and fixed; the outlet of the lifting water supply pipe (10) is connected to the inlet of the fire extinguishing agent side nozzle (12) or the fire extinguishing agent top nozzle (13); the outlet of the fire extinguishing agent side nozzle (12) is located on one side of the wood pile (5); and the outlet of the fire extinguishing agent top nozzle (13) is located above the wood pile (5).

5. The water additive type forest fire extinguishing agent fire extinguishing performance testing device according to claim 4, characterized in that: The outlets of the fire extinguishing agent side nozzle (12) and the fire extinguishing agent top nozzle (13) are connected with nozzles, and the nozzles include one or more of a conical nozzle, a wide-angle nozzle, a direct current nozzle, and an atomizing nozzle. When connecting multiple or more nozzles, they are connected through a water distributor.

6. The water additive type forest fire extinguishing agent fire extinguishing performance testing device according to claim 4, characterized in that: The measurement and control assembly comprises a weighing device (14), a temperature acquisition system, an automatic igniter, an infrared thermal imager, and a camera. The temperature acquisition system has a plurality of temperature acquisition terminals, which are distributed in a plurality of gap positions on the woodpile (5). The weighing device (14) is arranged at the lower end of the test water storage tank (2), the automatic igniter is arranged in the woodpile (5), and the infrared thermal imager and the camera are used to collect temperature change images and actual images in the test box (1).

7. The water additive type forest fire extinguishing agent fire extinguishing performance testing device according to claim 5, characterized in that: An exhaust fan (15) is arranged on the top of the test box (1).

8. A method for testing the fire extinguishing performance testing device of a water additive type forest fire extinguishing agent as claimed in claim 6, characterized in that: The following steps are involved: (S1) preparing a wood pile (5) and placing it in a constant temperature and humidity chamber, testing its moisture content with a firewood moisture content tester, and controlling the moisture content of the wood strips of the wood pile (5) to be between 10% and 14% by adjusting the environmental conditions; (S2) weighing a fire extinguishing agent to be tested with a mass of Q0 and placing it in a fire extinguishing agent storage box (6); (S3) taking a wood pile (5) whose moisture content meets the requirements, weighing and recording its mass, which is the initial mass M0 of the wood pile (5); (S4) soaking the wood pile evenly with an ignition liquid such as ethanol or n-heptane, with a soaking height of 2 cm and a soaking time of 5-10 min, taking out and weighing the mass of the wood pile, which is recorded as M1; (S5) placing the woodpile (5) on the combustion support (3), installing the temperature acquisition system and automatic igniter of the measurement and control assembly, and placing the electronic igniter in the gap between the first layer of wood strips of the woodpile (5); (S6) starting the weighing device (14), adjusting the weight to zero and starting data collection, the real-time mass is recorded as M, and its absolute value can be calculated according to the following formula: |M|=M1-M0(1-φ), where φ is the weight loss rate of the wood pile, which can be set in the range of 20%-80%; (S7) starting the temperature acquisition system, the infrared thermal imager and the camera to start recording; (S8) igniting the wood pile (5) by an electronic igniter, at which time the mass of the wood pile (5) gradually decreases, and M is displayed as a negative value; (S9) When the weight loss rate φ of the wood pile (5) reaches the set value, the water pump (7) is started to inject water or spray fire extinguishing, and the pre-combustion time t0 is recorded. The flow rate of the water pump (7) is adjusted to meet the set water injection rate q i Or spray rate q s Water injection rate q i and spray rate q s The setting range is 30g / min-1000g / min; (S10) When the flame is extinguished and the temperature at each measuring point is lower than 50° C., the water pump (7) is turned off, and the weighing system, temperature data acquisition system, infrared thermal imager and camera continue to record for 5 minutes and then turned off, and the corresponding data is saved; (S11) Weigh and record the mass M of the wood pile (5) after the fire is extinguished e , the mass Q of the remaining fire extinguishing agent in the fire extinguishing agent storage tank (6) and the pipeline r 、Test water tank (2) receives fire extinguishing agent mass Q u ; (S12) Perform data analysis and calculation according to the following formula: The total mass of fire extinguishing agent released is Q = Q0-Q r (g) Effective fire extinguishing agent dosage Q e =QQ u (g) Fire extinguishing efficiency Fire extinguishing time t e The time is the time from the start of fire extinguishing to the time when the open flame is extinguished and all measured temperatures are below 50°C, which is determined by comprehensive temperature data and image data.

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