Fire extinguishing water spraying intensity detection method for propellant fire

Abstract

The invention discloses a fire extinguishing water spraying intensity detection method for propellant fire in the field of propellant fire extinguishing. A superspeed deluge system, an ignition system, a charging device and a weighing device are included. The ultra-high-speed deluge system comprises a high-speed detector, a control system, a quick opening valve, a sprinkler head, a water supply pipe, a pressure water supply device and an air supply device; the ignition system comprises a resistance wire, an ignition circuit and an ignition device.The fire extinguishing water spraying intensity detection method for the propellant fire is provided for solving the problems that the propellant fire cannot be extinguished through the water spraying intensity of an existing deluge system, and an ultra-high-speed deluge system cannot be effectively applied to a propellant production site. The problem that an existing propellant powder production place does not have a key parameter of fire extinguishing water spraying intensity is solved, effective application of the ultra-high-speed rain extinguishing technology in the propellant powder production place is achieved, and safety of production personnel and equipment is protected.

Description

Technical Field

[0001] The invention relates to the technical field of propellant fire extinguishing, in particular to a method for detecting the water spray intensity of propellant fire extinguishing. Background Art

[0002] Propellant is widely used in the military field as the energy source for launching projectiles from barreled weapons such as guns and artillery. It is an important guarantee for weapons and equipment to achieve precise strikes and long-range launches. Propellant is easily burned by friction, static electricity, heat and other stimuli during the production process. Propellant fire has the characteristics of fast burning speed, high heat generation, and easy transformation into detonation. In view of the combustion hazard in the production process of propellant, in addition to continuously improving the inherent safety of the process and the level of automated production, an effective fire extinguishing system is installed in the production site to extinguish the propellant combustion accident in the initial stage or limit its development and spread, which can prevent the accident from expanding, protect the safety of production personnel and reduce equipment losses. The automatic fire extinguishing system installed in the existing propellant production site is a deluge system. The water spray intensity of the severe hazard level II is 16L / (min·m 2 ) is designed, the water spray intensity of this system poses a great safety hazard for extinguishing propellant fires: first, the water spray intensity of this system is only suitable for some civil buildings or industrial buildings where fires develop relatively quickly, and is not suitable for propellant production sites. Second, the water spray intensity of this system is not enough to extinguish propellant fires and cannot effectively protect the safety of production personnel. An ultra-high-speed deluge system refers to a deluge system with a response time of no more than 100ms. It has the advantages of fast response time and high water spray intensity. Water spray intensity is the core technical parameter of the ultra-high-speed deluge system and is related to whether the system can effectively extinguish propellant fires. The lack of this key parameter, water spray intensity for extinguishing propellant fires, has severely restricted the application and development of ultra-high-speed deluge fire extinguishing technology in propellant production sites. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of the present invention to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] Aiming at the problems that the water spray intensity of the existing deluge system is unable to extinguish the propellant fire and the ultra-high-speed deluge system cannot be effectively applied in the propellant production site, the present invention provides a method for detecting the water spray intensity of extinguishing the propellant fire, solves the problem that the existing propellant production site does not have the key parameter of the water spray intensity of fire extinguishing, realizes the effective application of the ultra-high-speed deluge fire extinguishing technology in the propellant production site, and protects the safety of production personnel and equipment.

[0005] The present invention proposes a method for detecting the intensity of water spray for extinguishing a propellant fire, comprising an ultra-high-speed deluge system, an ignition system, a charging device, and a weighing device; the ultra-high-speed deluge system comprises a high-speed detector, a control system, a quick-opening valve, a sprinkler head, a water supply pipe, a pressure water supply device, and an air supply device; the ignition system comprises a resistance wire, an ignition circuit, and an ignition device; and the control system comprises a controller and a control circuit.

[0006] It also includes a detection method based on a detection system, and the specific steps are as follows:

[0007] Step 1: Load a certain mass of propellant sample into the charging device, and then install the resistance wire into the propellant sample;

[0008] Step 2: Ignition is performed through the ignition system. When the high-speed detector recognizes the flame of the burning propellant sample, it sends an electrical signal to the control system, and then the quick opening valve is opened, and the sprinkler nozzle starts to spray water to extinguish the fire;

[0009] Step 3: During the fire extinguishing process, the water supply flow rate of the ultra-high-speed deluge system is recorded by a flow monitoring sensor; the remaining propellant sample is collected, dried, and then placed in the weighing device for weighing, and its mass is recorded;

[0010] Step 4: Use no less than 7 groups of different water spray intensities to carry out the above steps 1-3, and repeat the fire extinguishing test for each group of water spray intensity 3 times;

[0011] Step 5: Calculate the fire extinguishing water spray intensity of the propellant sample fire

[0012] By adopting the above technical scheme, this scheme can achieve rapid response in the initial stage of propellant fire by using ultra-high-speed rain shower system with different water spray intensities to conduct fire extinguishing tests, and can determine the fire extinguishing water spray intensity required for propellant fire, extinguish the propellant fire, prevent combustion from turning into detonation, thereby reducing accident losses and protecting the safety of production personnel and equipment.

[0013] Preferably, the ultra-high-speed rain shower system further comprises the following steps:

[0014] S1: Test system preparation. In this step, the valves in the air supply pipe and the water supply pipe are opened, and the valve in the water supply pipe is closed. Then, the valve of the water supply pipe is opened to start water supply to the pressure water supply device. After the water level reaches the preset high water level, the valve of the water supply pipe is closed to complete the water supply.

[0015] S2 is a step of adjusting the water supply, in which the required water supply flow is obtained by debugging the pressure of the pressure monitoring sensor in the water supply pipe and the sprinkler nozzles with different flow ranges. The required sprinkler nozzles are installed, and then the air compressor and the pressure reducing and stabilizing valve are set to the required pressure and set to the automatic start state. The air compressor automatically starts to replenish the pressure of the air tank and the pressure water supply device. After the pressure replenishment is completed, the air compressor stops running. The air tank and the pressure water supply device are provided with a pressure relief valve. When the pressure exceeds the rated pressure, the pressure relief valve automatically releases the pressure. Debug other devices of the ultra-high-speed sprinkler system so that they are all in a quasi-working state. By adopting the above technical scheme, this scheme can achieve the setting and adjustment effect of the water spray parameters of this system through the above steps.

[0016] Preferably, the charging device further comprises the following steps:

[0017] A1: Sample preparation step, in which the charging device is placed directly below the sprinkler head and the propellant sample is loaded into the charging device.

[0018] A2 is the step of installing the resistance wire. In this step, disconnect the power line of the ignition circuit of the ignition system, insert the resistance wire into the propellant sample, and connect the ignition circuit after the installation is completed.

[0019] By adopting the above technical solution, this solution can achieve the same combustion effect of the device as the fire in the production process by setting different amounts of propellant and different ignition positions.

[0020] Preferably, the ignition system further comprises the following steps:

[0021] B1 fire extinguishing test step, this step starts the ignition device to ignite the propellant sample. When the high-speed detector recognizes the flame of the propellant sample, it sends an electrical signal to the control system, and then opens the quick opening valve, and the sprinkler starts to spray water to extinguish the fire. The water supply flow of the ultra-high-speed rain system is recorded by the flow monitoring sensor during the fire extinguishing process.

[0022] By adopting the above technical solution, the present invention realizes the ignition effect of the present system through remotely controlled ignition.

[0023] Preferably, the weighing device further comprises the following steps:

[0024] C1: Remaining sample weighing step: After the fire extinguishing test is completed, the remaining propellant samples are collected, dried, weighed using a weighing device, and their mass is recorded.

[0025] By adopting the above technical solution, this solution can further calculate the fire extinguishing effect of different water spraying intensities by weighing the remaining propellant weight after the fire extinguishing test, thereby achieving the use effect of the device.

[0026] Preferably, the method further comprises the following steps of repeating multiple times:

[0027] D1: Test step for extinguishing propellant fire with different water spray intensities. This step selects no less than 7 groups of different water spray intensities for fire extinguishing test, and each group is tested 3 times;

[0028] D2 is a step for determining the intensity of the fire-fighting water spray. In this step, the mass of the propellant sample is combined with the average mass of the remaining propellant samples obtained from the fire-fighting tests with different water spray intensities and related parameter data, and the fire-fighting water spray intensity of the propellant sample fire is determined by calculation.

[0029] By adopting the above technical solution, the present solution can achieve multiple measurement effects of the present method through repeated experiments, thereby determining the effective fire extinguishing water spray intensity.

[0030] Preferably, the method also includes a calculation method for the water spray intensity in the above experimental data:

[0031] The pressure of the pressure monitoring sensor in the water supply pipe of the ultra-high-speed rain sprinkler system is adjusted to obtain the required water supply flow rate with the sprinkler heads of different flow ranges. Calculate the water spray intensity of the ultra-high-speed rain system, where: F is the water spray intensity of the ultra-high-speed rain system, in units of L / (s·m 2 ) ; Q is the water supply flow rate of the ultra-high-speed sprinkler system, in L / s; h is the vertical height of the sprinkler nozzle from the upper surface of the propellant sample, in m; θ is the spraying angle of the sprinkler nozzle, in degrees.

[0032] By adopting the above technical solution, this solution can obtain the water spray intensity of the ultra-high-speed rain sprinkler system through the above calculation formula, thereby facilitating subsequent numerical comparison.

[0033] Preferably, the method further includes a calculation method for determining the fire extinguishing water spray intensity of the propellant sample fire in the above experimental data:

[0034] When m c -m n+1 =m c -m n When 0(n≥1),

[0035] Where n is the number of experimental groups; m c is the mass of the propellant sample, in kg; m n is the average mass of the remaining propellant samples after the nth group of fire extinguishing tests, in kg; F n The water spray intensity for fire extinguishing is determined in L / (s·m 2 );Q n is the water supply flow rate of the nth group of ultra-high-speed sprinkler systems, in L / s; h is the vertical height of the sprinkler nozzle from the upper surface of the propellant sample, in m; θ nIt is the spraying angle of the sprinkler head, in degrees.

[0036] By adopting the above technical solution, the present solution can obtain the fire extinguishing water spray intensity of the propellant sample fire through the above calculation formula, and at the same time, the fire extinguishing water spray intensity is compared with the sample combustion volume to compare the fire extinguishing efficiency.

[0037] Preferably, the response time of the ultra-high-speed rain shower system is t≤100ms, including: high-speed detector response time t1≤20ms, control system response time t2≤10ms, fast opening valve response time t3≤50ms, and time t4≤80ms for spraying water to the surface of the propellant sample;

[0038] The ultra-high-speed sprinkler system: 1L / s≤Q≤60L / s, 0.2MPa≤pressure of the pressure water supply device P≤1.6MPa, 1L / s≤sprinkler flow rate Q1≤15L / s, 40°≤θ≤120°.

[0039] By adopting the above technical solution, this solution can achieve the effect of rapid and effective fire extinguishing by setting the response time.

[0040] Preferably, the high-speed detector is one or more of a red-ultraviolet composite type and an image type, the fast-opening valve is a pneumatic type or an electric type, the vertical height h of the sprinkler head from the upper surface of the propellant sample is 0.05m≤h≤1.50m, and the mass of the propellant sample m c 0.1kg≤m c ≤50kg, the stacking height h1 of the propellant sample is 1cm≤h1≤50cm, and the height h2 of the resistance wire inserted below the center surface of the propellant sample is h2<the critical height of the propellant sample from combustion to detonation.

[0041] By adopting the above technical scheme, this scheme stipulates the quality and ignition position of the propellant sample, thereby ensuring the consistency of this method with the fire development trend of the actual production process, and ensuring the effectiveness of this detection method in extinguishing propellant fires in the production process.

[0042] In summary, the present invention includes at least one of the following beneficial effects:

[0043] The present invention can determine the fire extinguishing water spray intensity of propellant fire under different production conditions by bringing relevant parameters and data into the formula, and the result is more accurate and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0045] Figure 1 A schematic diagram of a test system used in the present invention;

[0046] Figure 2 It is a flow chart of a method for detecting the intensity of water spray for extinguishing a propellant fire;

[0047] Figure 3 This is a table diagram of test data of Example 2;

[0048] Figure 4 This is a table diagram of test data of Example 3;

[0049] Figure 5 This is a table diagram of test data of Example 4;

[0050] Figure numerals: 1. air compressor; 2. air storage tank; 3. pressure water supply device; 4. quick opening valve; 5. sprinkler nozzle; 6. high-speed detector; 7. controller; 8. control circuit; 9. pressure monitoring sensor; 10. flow monitoring sensor; 11. valve; 12. pressure relief valve; 13. pressure reducing and stabilizing valve; 14. air supply pipe; 15. water supply pipe; 16. water supply pipe; 17. charging device; 18. propellant sample; 19. resistance wire; 20. ignition circuit; 21. ignition device. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1-5 The present invention is described in further detail.

[0052] Embodiment 1

[0053] like Figure 1-5 As shown, in order to solve the existing problems, in this embodiment, the present invention discloses a method for detecting the intensity of water spray for extinguishing a propellant fire, comprising an ultra-high-speed deluge system, an ignition system, a charging device 17, and a weighing device; the ultra-high-speed deluge system comprises a high-speed detector 6, a control system, a quick-opening valve 4, a sprinkler head 5, a water supply pipe 16, a pressure water supply device 3, and an air supply device; the ignition system comprises a resistance wire 19, an ignition circuit 20, and an ignition device 21, and the control system comprises a controller 7 and a control circuit 8.

[0054] The ultra-high-speed rain shower system also includes the following steps:

[0055] S1 detection system preparation, in this step, the valves 11 in the air supply pipe 14 and the water supply pipe 16 are opened, and the valve 11 in the water supply pipe 15 is closed. Then the valve 11 of the water supply pipe 15 is opened to start water supply to the pressure water supply device 3, and after the water level is replenished to the preset high water level, the valve 11 of the water supply pipe 15 is closed to complete the water supply;

[0056] S2 is a step of adjusting the water supply. This step is to obtain the required water supply flow rate by adjusting the pressure of the pressure monitoring sensor 9 in the water supply pipe 16 and the sprinkler heads 5 with different flow ranges. Install the required sprinkler heads 5, then set the air compressor 1 and the pressure reducing and stabilizing valve 13 to the required pressure and set them to the automatic start state. The air compressor 1 automatically starts to replenish the pressure of the air tank 2 and the pressure water supply device 3. After the pressure replenishment is completed, the air compressor 1 stops running. The air tank 2 and the pressure water supply device 3 are provided with a pressure relief valve 12. When the pressure exceeds the rated pressure, the pressure relief valve 12 automatically releases the pressure. Debug other devices of the ultra-high-speed rain sprinkler system so that they are all in a quasi-working state.

[0057] The charging device 17 further comprises the following steps:

[0058] S3 is a sample preparation step, in which the charge device 17 is placed directly below the sprinkler head 5 and the propellant sample 18 is loaded into the charge device 17 .

[0059] S4 is a step of installing the resistance wire 19, in which the power line of the ignition circuit 20 of the ignition system is disconnected, and the resistance wire 19 is inserted into the propellant sample 18. After the installation is completed, the ignition circuit 20 is connected.

[0060] The ignition system also includes the following steps:

[0061] S5 is a fire extinguishing test step, in which the ignition device 21 is started to ignite the propellant sample 18. When the high-speed detector 6 recognizes the flame of the propellant sample 18, it sends an electrical signal to the control system, and then opens the quick opening valve 4, and the sprinkler head 5 starts to spray water to extinguish the fire. During the fire extinguishing process, the flow monitoring sensor 10 records the water supply flow of the ultra-high-speed rain system.

[0062] The weighing device also includes the following steps:

[0063] S6 is a step of weighing the remaining samples. After the fire extinguishing test is completed, the remaining propellant sample 18 is collected, dried, weighed using a weighing device, and the mass thereof is recorded.

[0064] It also includes the following multiple repetitions:

[0065] S7: Test step for extinguishing propellant fire with different water spray intensities. This step selects no less than 7 groups of different water spray intensities for fire extinguishing test, and each group is tested 3 times;

[0066] S8 is a step for determining the intensity of the fire extinguishing water spray. In this step, the mass of the propellant sample 18 is combined with the average mass of the remaining propellant sample 18 obtained from the fire extinguishing tests with different water spray intensities and related parameter data, and the fire extinguishing water spray intensity of the propellant sample 18 is determined through calculation.

[0067] It also includes the calculation method for the water spray intensity in the above experimental data:

[0068] The pressure of the pressure monitoring sensor 9 in the water supply pipe 16 of the ultra-high-speed rain shower system is adjusted to obtain the required water supply flow rate of the sprinkler nozzle 5 with different flow ranges. Calculate the water spray intensity of the ultra-high-speed rain system, where: F is the water spray intensity of the ultra-high-speed rain system, in units of L / (s·m 2 ); Q is the water supply flow rate of the ultra-high-speed sprinkler system, in L / s; h is the vertical height of the sprinkler nozzle 5 from the upper surface of the propellant sample 18, in m; θ is the spraying angle of the sprinkler nozzle 5, in °.

[0069] Also included is a calculation method for determining the fire extinguishing water spray intensity of the propellant sample 18 fire in the above experimental data:

[0070] When m c -m n+1 =m c -m n When 0(n≥1),

[0071] Where n is the number of experimental groups; m c is the mass of propellant sample 18, in kg; m n is the average mass of the remaining propellant sample 18 after the nth group of fire extinguishing tests, in kg; F n The water spray intensity for fire extinguishing is determined in L / (s·m 2 );Q n is the water supply flow rate of the nth group of ultra-high-speed sprinkler systems, in L / s; h is the vertical height of the sprinkler head 5 from the upper surface of the propellant sample 18, in m; θ n is the spraying angle of the sprinkler head 5, in degrees.

[0072] The response time of the ultra-high-speed rain shower system is t≤100ms, including: the response time of the high-speed detector 6 is t1≤20ms, the response time of the control system is t2≤10ms, the response time of the fast-opening valve 4 is t3≤50ms, and the time of spraying water to the surface of the propellant sample 18 is t4≤80ms;

[0073] The ultra-high-speed shower system: 1L / s≤Q≤60L / s, 0.2MPa≤pressure of the pressure water supply device 3 P≤1.6MPa, 1L / s≤flow rate of the sprinkler nozzle 5 Q1≤15L / s, 40°≤θ≤120°.

[0074] The high-speed detector 6 is one or more of a red-ultraviolet composite type and an image type, the fast-opening valve 4 is a pneumatic type or an electric type, the vertical height h of the sprinkler head 5 from the upper surface of the propellant sample 18 is 0.05m≤h≤1.50m, and the mass of the propellant sample 18 is m c 0.1kg≤m c ≤50kg, the stacking height h1 of the propellant sample 18 is 1cm≤h1≤50cm, and the height h2 of the resistance wire 19 inserted below the center surface of the propellant sample 18 is h2<the critical height of the propellant sample 18 from combustion to detonation.

[0075] Embodiment 2

[0076] like Figure 1-5 As shown, in order to solve the existing problems in this embodiment, based on the same concept as the above-mentioned embodiment 1, the fire extinguishing water spray intensity detection method for a propellant fire also includes the following experimental data:

[0077] In this case, 7 groups of water spray intensities corresponding to water supply flow rates of 1.5L / s, 2.0L / s, 2.5L / s, 3.0L / s, 3.5L / s, 4.0L / s, and 4.5L / s were selected for fire extinguishing test. Each group was tested 3 times. In this case, the mass of propellant sample 18 was selected to be 5kg, and the stacking height of propellant sample 18 was selected to be 10cm. You can also select the corresponding mass of propellant sample 18, stacking height of propellant sample 18, water spray intensity, and ignition position for fire extinguishing test according to actual production conditions;

[0078] Test data see Figure 3 , the mass of propellant sample 18 and the average mass of the remaining propellant sample 18 obtained from the fire extinguishing test with different water spray intensities and related parameter data are substituted into the formula for determining the water spray intensity for fire extinguishing of propellant sample 18. After calculation, it is determined that the water spray intensity for fire extinguishing of propellant sample 18 in this case is 6.4L / (s·m 2 ).

[0079] Embodiment 3

[0080] like Figure 1-5 As shown, in order to solve the existing problems in this embodiment, based on the same concept as the above-mentioned embodiment 1, the fire extinguishing water spray intensity detection method for a propellant fire also includes the following experimental data:

[0081] In this case, 7 groups of water spray intensities corresponding to water supply flow rates of 3.0L / s, 3.5L / s, 4.0L / s, 4.5L / s, 5.0L / s, 5.5L / s, and 6.0L / s were selected for fire extinguishing test, and each group was tested 3 times. In this case, the mass of propellant sample 18 was selected to be 10kg, and the stacking height of propellant sample 18 was selected to be 15cm. You can also select the corresponding mass of propellant sample 18, stacking height of propellant sample 18, water spray intensity, and ignition position for fire extinguishing test according to actual production conditions;

[0082] Test data see Figure 4 , the mass of propellant sample 18 and the average mass of the remaining propellant sample 18 obtained from the fire extinguishing test with different water spray intensities and related parameter data are substituted into the formula for determining the water spray intensity of the fire extinguishing of propellant sample 18. After calculation, it is determined that the water spray intensity of the fire extinguishing of the propellant sample 18 in this case is 11.8L / (s·m 2 ).

[0083] Embodiment 4

[0084] like Figure 1-5 As shown, in order to solve the existing problems in this embodiment, based on the same concept as the above-mentioned embodiment 1, the fire extinguishing water spray intensity detection method for a propellant fire also includes the following experimental data:

[0085] In this case, 7 groups of water spray intensities corresponding to water supply flow rates of 12L / s, 16L / s, 20L / s, 24L / s, 28L / s, 32L / s, and 36L / s were selected for fire extinguishing test, and each group was tested 3 times. In this case, the mass of propellant sample 18 was selected to be 20kg, and the stacking height of propellant sample 18 was selected to be 20cm. You can also select the corresponding mass of propellant sample 18, stacking height of propellant sample 18, water spray intensity, ignition position, etc. for fire extinguishing test according to actual production conditions.

[0086] Test data see Figure 5 , the mass of propellant sample 18 and the average mass of the remaining propellant sample 18 obtained from the fire extinguishing test with different water spray intensities and related parameter data are substituted into the formula for determining the water spray intensity of the fire extinguishing of propellant sample 18. After calculation, it is determined that the water spray intensity of the fire extinguishing of the propellant sample 18 in this case is 333.3L / (s·m 2 ).

[0087] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the intensity of water spray for extinguishing a propellant fire, characterized in that: The invention comprises a detection system, wherein the detection system comprises an ultra-high-speed shower system, an ignition system, a charge device (17) and a weighing device; the ultra-high-speed shower system comprises a high-speed detector (6), a control system, a quick-opening valve (4), a sprinkler head (5), a water supply pipe (16), a pressure water supply device (3) and an air supply device; the control system comprises a controller (7) and a control circuit (8); the ignition system comprises a resistance wire (19), an ignition circuit (20) and an ignition device (21); It also includes a detection method based on a detection system, and the specific steps are as follows: Step 1: Load a certain mass of a propellant sample (18) into the charge loading device (17), and then install a resistance wire (19) into the propellant sample (18); Step 2: Ignition is performed through the ignition system. When the high-speed detector (6) recognizes the flame of the propellant sample (18) burning, it sends an electrical signal to the control system, and then the quick-opening valve (4) is opened, and the sprinkler head (5) starts to spray water to extinguish the fire; Step 3: During the fire extinguishing process, the water supply flow rate of the ultra-high-speed deluge system is recorded by the flow monitoring sensor (10); the remaining propellant sample (18) is collected, dried, and then placed in the weighing device for weighing, and its mass is recorded; Step 4: Use no less than 7 groups of different water spray intensities to carry out the above steps 1-3, and repeat the fire extinguishing test for each group of water spray intensity 3 times; Step 5: Calculate the fire extinguishing water spray intensity of the propellant sample (18) fire.

2. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 1, characterized in that: The method of operating the ultra-high-speed rain shower system also includes the following steps: S1: Detection system preparation. In this step, the valves (11) in the air supply pipe (14) and the water supply pipe (16) are placed in an open state, the valve (11) in the water supply pipe (15) is placed in a closed state, and then the valve (11) of the water supply pipe (15) is opened to start water supply to the pressure water supply device (3). After the water level is replenished to a preset high water level, the valve (11) of the water supply pipe (15) is closed to complete the water supply; S2 is a step of adjusting the water supply, in which the required water supply flow is obtained by adjusting the pressure of the pressure monitoring sensor (9) in the water supply pipe (16) and the sprinkler nozzles (5) of different flow ranges, the required sprinkler nozzles (5) are installed, and then the air compressor (1) and the pressure reducing and stabilizing valve (13) are set to the required pressure and set to the automatic start state. The air compressor (1) automatically starts to replenish the pressure of the air storage tank (2) and the pressure water supply device (3). After the pressure replenishment is completed, the air compressor (1) stops running, and the other devices of the ultra-high-speed sprinkler system are adjusted so that they are all in a quasi-working state.

3. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 2, characterized in that: The method for operating the charging device (17) comprises the following steps: A1: a sample preparation step, in which a charge device (17) is placed directly below the sprinkler head (5), and a propellant sample (18) is loaded into the charge device (17); A2 is a step of installing the resistance wire (19), in which the power line of the ignition circuit (20) of the ignition system is disconnected, the resistance wire (19) is inserted into the propellant sample (18), and the ignition circuit (20) is connected after the installation is completed.

4. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 3, characterized in that: The method of operation of the ignition system comprises the following steps: B1 fire extinguishing test step, in which the ignition device (21) is started to ignite the propellant sample (18), and when the high-speed detector (6) recognizes the flame of the burning propellant sample (18), an electrical signal is sent to the control system, and then the quick opening valve (4) is opened, and the sprinkler head (5) starts to spray water to extinguish the fire. During the fire extinguishing process, the water supply flow of the ultra-high-speed sprinkler system is recorded through the flow monitoring sensor (10).

5. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 4, characterized in that: The weighing device also includes the following steps: C1: Remaining sample weighing step. After the fire extinguishing test is completed, the remaining propellant sample (18) is collected, dried, weighed using a weighing device, and its mass is recorded.

6. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 5, characterized in that: It also includes the following multiple repetitions: D1: Test step for extinguishing propellant fire with different water spray intensities. This step selects no less than 7 groups of different water spray intensities for fire extinguishing test, and each group is tested 3 times; D2 is a step for determining the intensity of the fire extinguishing water spray, in which the mass of the propellant sample (18) is combined with the average mass of the remaining propellant sample (18) obtained from the fire extinguishing test with different water spray intensities and related parameter data, and the fire extinguishing water spray intensity of the propellant sample (18) is determined by calculation.

7. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 6, characterized in that: It also includes the calculation method for the water spray intensity in the above experimental data: The pressure of the pressure monitoring sensor (9) in the water supply pipe (16) of the ultra-high-speed sprinkler system is adjusted with the sprinkler heads (5) of different flow ranges to obtain the required water supply flow rate. The formula Calculate the water spray intensity of the ultra-high-speed rain system, where: F is the water spray intensity of the ultra-high-speed rain system, in units of L / (s·m 2 ), Q is the water supply flow rate of the ultra-high-speed sprinkler system, in L / s, h is the vertical height of the sprinkler head (5) from the upper surface of the propellant sample (18), in m, and θ is the spraying angle of the sprinkler head (5), in degrees.

8. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 7, characterized in that: Also included is a calculation method for determining the fire extinguishing water spray intensity of the propellant sample (18) fire in the above experimental data: When m c -m n+1 =m c -m n When (n≥1), Where n is the number of experimental groups, m is c is the mass of the propellant sample (18), in kg; m n is the average mass of the remaining propellant sample (18) after the nth group of fire extinguishing tests, in kg, F n The water spray intensity for fire extinguishing is determined in L / (s·m 2 ), Q n is the water supply flow rate of the nth group of ultra-high-speed sprinkler systems, in L / s, h is the vertical height of the sprinkler head (5) from the upper surface of the propellant sample (18), in m, θ n is the spraying angle of the sprinkler head (5), in degrees.

9. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 8, characterized in that: The response time of the ultra-high-speed shower system is t≤100ms, including: the response time of the high-speed detector (6) is t1≤20ms, the response time of the control system is t2≤10ms, the response time of the fast opening valve (4) is t3≤50ms, and the time of spraying water to the surface of the propellant sample (18) is t4≤80ms; The ultra-high-speed shower system: 1L / s≤Q≤60L / s, 0.2MPa≤pressure water supply device (3) pressure P≤1.6MPa, 1L / s≤sprinkler nozzle (5) flow rate Q1≤15L / s, 40°≤θ≤120°.

10. A method for detecting the intensity of water spray for extinguishing a propellant fire according to claim 9, characterized in that: The high-speed detector (6) is one or more of a red-ultraviolet composite type and an image type, the fast-opening valve (4) is a pneumatic type or an electric type, the vertical height h of the sprinkler head (5) from the upper surface of the propellant sample (18) is 0.05m≤h≤1.50m, and the mass of the propellant sample (18) is m c 0.1kg≤m c ≤50kg, the stacking height h1 of the propellant sample (18) is 1cm≤h1≤50cm, and the height h2 of the resistance wire (19) inserted below the central surface of the propellant sample (18) is h2<the critical height of the propellant sample (18) from combustion to detonation.

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