Fire-fighting equipment with self-protection function and design method

Abstract

The invention provides a water / foam circulating system, and relates to the technical field of emergency fire-fighting equipment around petrochemical fires, and the water / foam circulating system comprises a circulating device which is used for generating fire-fighting water / fire-fighting foam according to test requirements; and the water spraying device is connected with the circulating device and is used for spraying fire-fighting water / fire-fighting foam to the target spraying object. The water / foam circulation system provided by the invention can realize water / foam circulation, and the heat radiation tolerance limit value of the water / foam circulation system can be determined through a water / foam circulation test method.

Description

Technical Field

[0001] The invention relates to the technical field of emergency fire fighting equipment around petrochemical fires, and in particular to fire fighting equipment with a self-protection function and a design method. Background Art

[0002] Fire accidents frequently occur in the petrochemical industry due to the flammable and explosive properties of the medium. There are two types of fires in the petrochemical industry: pool fire and jet fire. Due to the high calorific value of the medium in the petrochemical industry, the thermal radiation released by petrochemical fires is high, which has a great impact on the surrounding people and equipment.

[0003] At present, the international community has established a rough thermal radiation damage criterion for people, common materials and equipment. The damage criterion for people is relatively detailed. The damage criterion for equipment or materials mainly includes: the critical thermal radiation of flammable materials (paper or thin wood chips) is 10kW / m 2 The critical thermal radiation of general materials (such as decorative furniture) is 20kW / m 2 The critical thermal radiation of flame-retardant materials (such as wood boards with a thickness of more than 25 mm) is 40 kW / m 2 The critical thermal radiation of plastic melting is 12.5kW / m 2 , the critical heat radiation of steel structure deformation is 25kW / m 2 The critical heat radiation for equipment damage is 37.5kW / m 2 .

[0004] For specific fire-fighting equipment, these destruction criteria lack practicality and it is difficult to accurately determine the actual fire resistance performance of fire-fighting equipment for two reasons: 1. Most fire-fighting equipment has its own water spray cooling protection, which can improve the fire-fighting equipment's tolerance to thermal radiation; 2. The presence of fluids such as water or foam inside the spray structure of the fire-fighting equipment can play a cooling role and also improve the tolerance to thermal radiation.

[0005] Moreover, currently, the water sprinkler device of the fire fighting equipment starts to spray immediately after entering the fire scene, and the flow rate is the maximum flow rate, which leads to a waste of water resources.

[0006] In view of the problems of the prior art, the present invention provides a fire-fighting equipment with a self-protection function and a design method. Summary of the invention

[0007] In order to overcome the defects of the prior art, the present invention provides a water / foam circulation system, wherein the water / foam circulation system (100) comprises:

[0008] A circulation device, which is used to generate fire water / fire foam according to test requirements;

[0009] A water spray device (3) is connected to the circulation device and is used to spray fire water / fire foam to a target spray object.

[0010] According to one embodiment of the present invention, the circulation device comprises: a water tank (4), a foam liquid tank (5), a water pump (6), and a foam liquid pump (7), wherein the water pump (6) is connected to the water tank (4), and the foam liquid pump (7) is connected to the foam liquid tank (5).

[0011] According to one embodiment of the present invention, the circulation device comprises: a foam proportion mixer (8) and a foam generator (9), wherein the foam proportion mixer (8) is connected to a water pump (6) and a foam liquid pump (7) respectively, and the foam generator (9) is connected to the foam proportion mixer (8).

[0012] According to one embodiment of the present invention, the circulation device comprises: a first valve (101), a spray device (11), and a fire water pool / foam pool (12), wherein the spray device (11) is connected to a foam generator (9), the first valve (101) is arranged between the spray device (11) and the foam generator (9), and the fire water pool / foam pool (12) is connected to the spray device (11).

[0013] According to one embodiment of the present invention, the circulation device comprises: a second valve (102), a third valve (103), a circulating water pump (13), and a circulating compressor (14), wherein the fire water pool / foam pool (12) is connected to the circulating water pump (13) and the circulating compressor (14), respectively, the second valve (102) is arranged between the fire water pool / foam pool (12) and the circulating water pump (13), and the third valve (103) is arranged between the fire water pool / foam pool (12) and the circulating compressor (14).

[0014] According to one embodiment of the present invention, the circulation device comprises: a cooling device (15), wherein one end of the cooling device (15) is connected between the first valve (101) and the injection device (11), and the other two ends are respectively connected to the circulation water pump (13) and the circulation compressor (14).

[0015] According to another aspect of the present invention, there is also provided a water / foam circulation test method, which is performed by the water / foam circulation system (100) as described in any one of the above items, and the method comprises:

[0016] According to the test requirements, firefighting water / firefighting foam is generated through the circulation device;

[0017] Spraying fire water / fire foam to the target spraying object through a water spraying device (3) connected to the circulation device;

[0018] The maximum heat radiation value that the water / foam circulation system (100) can withstand during a specified period of operation is determined, and the maximum heat radiation value is recorded as the heat radiation tolerance limit value of the water / foam circulation system (100).

[0019] According to one embodiment of the present invention, the heat radiation tolerance limit value of the water / foam circulation system (100) is determined by the following steps:

[0020] Under the test conditions, a petrochemical pool fire and / or jet fire is simulated, and the water / foam circulation system (100) is subjected to a preset heat radiation value and maintained unchanged;

[0021] The fire-fighting water / fire-fighting foam is circulated through the water / foam circulation system (100), the circulation time of the fire-fighting water / fire-fighting foam is recorded, and the state of the fire-fighting water / fire-fighting foam at the outlet of the spraying device (11) of the water / foam circulation system (100) entering the fire-fighting water pool / foam pool (12) during the circulation time is observed;

[0022] At the end of the cycle time, determining whether the fire water / fire foam at the outlet of the spray device (11) entering the fire water pool / fire foam pool (12) is gasified;

[0023] The heat radiation value received by the water / foam circulation system (100) is changed multiple times, and the heat radiation at which the fire-fighting water / fire-fighting foam begins to vaporize is recorded as the heat radiation tolerance limit value, and the time from the start of the fire-fighting water / fire-fighting foam circulation to the vaporization is recorded as the heat radiation tolerance limit time.

[0024] According to another aspect of the present invention, a storage medium is provided, which contains a series of instructions for executing the method steps as described in any one of the above.

[0025] According to another aspect of the present invention, there is also provided a fire-fighting equipment with a self-protection function, the fire-fighting equipment comprising:

[0026] A water / foam circulation system (100) as described in any one of the above items;

[0027] The self-protection system (200) is used to determine the self-protection spray flow rate according to the real-time thermal radiation value of the location where the water / foam circulation system (100) is located.

[0028] According to one embodiment of the present invention, the self-protection system (200) comprises:

[0029] A heat flow sensor (22) for detecting a real-time heat radiation value at a location where the water / foam circulation system (100) is located;

[0030] A calculation terminal (16) calculates the self-protection spray flow rate based on the real-time thermal radiation value detected by the thermal flow sensor (22).

[0031] According to one embodiment of the present invention, the self-protection system (200) comprises: a control system (18) and a self-spraying system (17), wherein the control system (18) is used to control the self-spraying system (17) to perform self-protection spraying according to the self-protection spraying flow rate.

[0032] According to another aspect of the present invention, a fire truck is provided, wherein the fire truck comprises the fire fighting equipment as described in any one of the above items.

[0033] According to another aspect of the present invention, a thermal radiation and spray flow rate testing system is also provided, the testing system comprising:

[0034] Firefighting equipment as described in any of the above items;

[0035] A test device (300) is used to simulate a petrochemical pool fire and / or a jet fire and measure the heat radiation value to which the fire fighting equipment is exposed.

[0036] According to one embodiment of the present invention, the testing device (300) comprises:

[0037] A simulated fire system (1) for simulating a petrochemical pool fire and / or a jet fire under test conditions;

[0038] A thermal radiation measuring system (21) is used to measure the thermal radiation received by the fire fighting equipment under test.

[0039] According to another aspect of the present invention, there is also provided a method for designing firefighting equipment with a self-protection function, the method comprising:

[0040] Under test conditions, a petrochemical pool fire and / or jet fire is simulated by a test system as described in any of the above items;

[0041] The water spray device (3) is turned on, and the test system is used to measure the heat radiation value received by the fire-fighting equipment at different spray flow rates of the water spray device (3).

[0042] Based on the relationship between the heat radiation value received by the fire-fighting equipment and the spray flow rate, combined with the heat radiation tolerance limit value and heat radiation tolerance limit time of the water / foam circulation system (100), the protection mechanism of the self-protection system (200) for the fire-fighting equipment is determined.

[0043] According to one embodiment of the present invention, the protection mechanism of the self-protection system (200) for the fire-fighting equipment is determined by the following expression:

[0044] R=k×q+b

[0045] Wherein, R is the heat radiation value received by the fire-fighting equipment; k is the coefficient; q is the spray flow rate of the water spray device (3), L / (min.m2); and b is the heat radiation tolerance limit value of the water / foam circulation system (100).

[0046] According to another aspect of the present invention, a storage medium is provided, which contains a series of instructions for executing the method steps as described in any one of the above.

[0047] The present invention provides a fire-fighting equipment with a self-protection function and a design method, which has the following advantages over the prior art:

[0048] (1) The water / foam circulation system provided by the present invention can realize water / foam circulation, and the heat radiation tolerance limit value of the water / foam circulation system can be determined by a water / foam circulation test method;

[0049] (2) The fire-fighting equipment with self-protection function provided by the present invention is equipped with a self-protection system, which can spray the fire-fighting equipment for self-protection;

[0050] (3) The present invention also provides a fire truck that can use a self-protection system to spray fire-fighting equipment for self-protection during the actual fire-fighting process;

[0051] (4) The thermal radiation and spray flow rate testing system provided by the present invention has the ability to simulate fire and measure thermal radiation. It can determine the protection mechanism of the self-protection system for fire-fighting equipment based on the relationship between the thermal radiation value received by the fire-fighting equipment and the spray flow rate, combined with the thermal radiation tolerance limit value and thermal radiation tolerance limit time of the water / foam circulation system through the fire-fighting equipment design method with self-protection function;

[0052] (5) In practical applications, the present invention can control the self-protection spray flow of fire-fighting equipment in real time to avoid wasting excessive water resources.

[0053] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0055] Figure 1 Shows a structural block diagram of a water / foam circulation system according to an embodiment of the present invention;

[0056] Figure 2 A flow chart of steps of a water / foam cycle test method according to an embodiment of the present invention is shown;

[0057] Figure 3 A flowchart showing the steps of a method for determining a heat radiation tolerance limit value of a water / foam circulation system according to an embodiment of the present invention is shown;

[0058] Figure 4 A structural block diagram of a fire-fighting equipment with a self-protection function according to an embodiment of the present invention is shown;

[0059] Figure 5 Shows a structural block diagram of a thermal radiation and spray flow rate testing system according to an embodiment of the present invention;

[0060] Figure 6 A flowchart of the steps of a method for designing fire-fighting equipment with a self-protection function according to an embodiment of the present invention is shown.

[0061] In the accompanying drawings, the same reference numerals are used for the same components. In addition, the accompanying drawings are not drawn according to the actual scale.

[0062] The meanings of the various reference numerals in the accompanying drawings are as follows: 100-water / foam circulation system; 3-water sprinkler device; 4-water tank; 5-foam liquid tank; 6-water pump; 7-foam liquid pump; 8-foam proportioning mixer; 9-foam generator; 101-first valve; 102-second valve; 103-third valve; 11-injection device; 12-fire water pool / foam pool; 13-circulating water pump; 14-circulating compressor; 15-cooling device; 200-self-protection system; 22-heat flow sensor; 16-computing terminal; 17-self-sprinkler system; 18-control system; 300-test equipment; 1-simulated fire system; 21-thermal radiation measurement system. DETAILED DESCRIPTION

[0063] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0064] The prior art (CN107506841B) provides a method and device for intelligent deployment of firefighting forces for oil tank area fires. By loading the three-dimensional model of the oil depot plant area, the three-dimensional model of people and vehicles, and the fire dynamics model on the GIS platform, a three-dimensional electronic sand table for firefighting operations in the oil depot plant area is constructed. The fire plume model and the thermal radiation model in the fire dynamics model are used to make scientific predictions of relevant flame parameters, danger ranges, and rescue operations ranges, and then a firefighting strategy is given for reference by firefighting operation commanders, which can realize the intelligent deployment of firefighting forces based on scientific predictions. The operational command level of firefighting commanders and the firefighting and rescue capabilities of fire brigades are improved, and casualties and property losses caused by fires are minimized. However, the above-mentioned prior art does not take into account the actual thermal radiation tolerance performance of firefighting equipment and the water-saving performance of firefighting equipment.

[0065] The prior art (CN109543919A) provides a fire dynamic emergency decision-making system based on accident evolution and its implementation method. The system includes an unmanned aerial vehicle detection platform or a personal portable detection equipment, a data communication transmission device, an accident scene command vehicle information processing server, a command center server, and an emergency auxiliary decision-making command system platform for information exchange and decision analysis. According to the characteristics of the accident scene, the disposal technology requirements, and the dynamic information parameters of the accident scene, the dynamic changes of the fire scene temperature, thermal radiation, environmental wind speed, and gas concentration parameters monitored in real time at the accident scene, as well as the predicted accident evolution law and consequences, the appropriate dynamic disposal plan elements are automatically matched from the dynamic emergency plan element database, and a dynamic emergency disposal plan is generated; and it is output on each display terminal in a multi-layer plotting manner. The quantitative and graphical display of the accident development trend and the accident consequences is realized, providing decision support for the accident emergency disposal command. However, the above-mentioned prior art does not take into account the actual thermal radiation tolerance performance of fire-fighting equipment and the water-saving performance of fire-fighting equipment.

[0066] The prior art (CN111022934B) provides a method for assessing the hazard of thermal radiation from a jet fire caused by a leak in a gas pipeline, comprising the following steps: determining the pipeline parameters of the gas pipeline and the environmental parameters of the location where the gas pipeline is located; determining the impact range corresponding to each preset hazard level according to the pipeline parameters and the environmental parameters, wherein the preset hazard level is the hazard level of thermal radiation generated by the jet fire caused by a leak in the gas pipeline. By introducing pipeline parameters and environmental parameters, the influence of internal pressure, pipe diameter, and wind speed on the thermal radiation range of a jet fire caused by a leak in a gas pipeline is considered, and a formula for the impact distance of thermal radiation from a jet fire caused by a leak in the gas pipeline that depends on the changes in internal pressure, pipe diameter, and wind speed is proposed. When a full-diameter leak occurs in a gas pipeline, a basis can be provided for the division of the impact range of different hazard levels of thermal radiation from a jet fire caused by a leak in the gas pipeline, and technical support can be provided for the emergency rescue of full-diameter rupture accidents in the gas pipeline. However, the above-mentioned prior art does not take into account the actual thermal radiation tolerance performance of fire-fighting equipment and the water-saving performance of fire-fighting equipment.

[0067] Existing technology (Wang Zhuo. Numerical simulation and safety protection distance research of crude oil storage tank pool fire [D]. Northeast Petroleum University, 2021. DOI: 10.26995 / d.cnki.gdqsc.2021.000021.) For tank pool fire, the following research was carried out: First, the relevant methods of theoretical calculation and numerical simulation of pool fire were introduced, and the empirical formula and numerical simulation software for pool fire suitable for large crude oil storage tanks were selected. The fire simulation software FDS and its visualization program Smoke View and the supporting modeling software Pyrosim were introduced, the basic principles involved in the operation process of the FDS main program were described, and the specific process of using FDS software for numerical simulation of large tank pool fire was determined. Secondly, a fire model was established in the FDS software and numerical simulations were performed on crude oil storage tank pool fires of different models. The changing laws of flame heat release rate, flame temperature and fire plume morphology and the distribution of thermal radiation intensity during the tank pool fire were described, and the safe distance of oil depot staff and fire extinguishing personnel in the fire was determined based on the thermal radiation damage criterion. Then, the impact of the tank pool fire on its adjacent tanks was studied. Through fire simulation, the distribution of thermal radiation intensity of the adjacent tank walls at different tank distances was obtained and the damage range of the tank walls was predicted. The safe distance between tanks of various types was determined, and a spray cooling system was arranged for adjacent tanks in the model. The cooling effect of different cooling water intensities on the tank walls was analyzed. Finally, a tank pool fire in a specific scenario of a large oil depot tank area was simulated, and the safe distance of the oil depot staff and the safe distance of firefighters in the fire were obtained. The damage range of the adjacent tank walls was predicted, and spray measures were applied to the adjacent tanks. The spray cooling effect was analyzed, and the amount of water required for spraying at each cooling water intensity was calculated. However, the above-mentioned prior art does not take into account the actual thermal radiation tolerance performance of firefighting equipment and the water-saving performance of firefighting equipment.

[0068] In summary, in order to solve the problems of the current prior art, the present invention takes into account the actual fire resistance performance of fire-fighting equipment, the spray flow rate and protection effect of the water sprinkler device, and proposes a water / foam circulation system for fire emergency rescue in the petrochemical industry, a water / foam circulation test method, and fire-fighting equipment with self-protection function. The actual fire resistance performance of the fire-fighting equipment and the spray protection flow rate required at the location of the fire-fighting equipment are comprehensively considered to form a fire truck with water-saving capability, a thermal radiation and spray flow test system, and a fire-fighting equipment design method with self-protection function.

[0069] Figure 1 A structural block diagram of a water / foam circulation system according to an embodiment of the present invention is shown.

[0070] A water / foam circulation system 100 comprises: a circulation device and a water spray device 3. The circulation device is used to generate fire water / fire foam according to test requirements. The water spray device 3 is connected to the circulation device and is used to spray fire water / fire foam to a target spray object. In one embodiment, the target spray object is a petrochemical pool fire and / or jet fire in the petrochemical field.

[0071] In one embodiment, Figure 1 As shown, the circulation device comprises: a water tank 4, a foam liquid tank 5, a water pump 6, and a foam liquid pump 7, wherein the water pump 6 is connected to the water tank 4, and the foam liquid pump 7 is connected to the foam liquid tank 5. Specifically, Figure 1 As shown, the water tank 4 is used to store fire water, and the water pump 6 is connected to the water tank 4 to pump out the fire water stored in the water tank 4. The foam liquid tank 5 is used to store fire foam liquid, and the foam liquid pump 7 is connected to the foam liquid tank 5 to pump out the fire foam liquid stored in the foam liquid tank 5.

[0072] In one embodiment, Figure 1 As shown, the circulation device includes: a foam proportion mixer 8 and a foam generator 9, wherein the foam proportion mixer 8 is connected to the water pump 6 and the foam liquid pump 7 respectively, and the foam generator 8 is connected to the foam proportion mixer 9.

[0073] Specifically, if Figure 1 As shown, for the water spray fire fighting equipment, the fire fighting water pumped out by the water pump 6 passes through the foam proportioning mixer 8 and the foam generator 9 to generate fire fighting water.

[0074] Specifically, if Figure 1 As shown, for the foam spraying fire fighting equipment, the foam proportioning mixer 8 is connected to the water pump 6 and the foam liquid pump 7 respectively, and is used to mix the fire fighting water pumped by the water pump 6 and the fire fighting foam pumped by the foam liquid pump 7 in a preset proportion. The foam generator 9 is connected to the foam proportioning mixer 8, and generates fire fighting foam based on the mixture mixed by the foam proportioning generator 8.

[0075] In one embodiment, Figure 1 As shown, the circulation device comprises: a first valve 101, an injection device 11, and a fire water pool / foam pool 12, wherein the injection device 11 is connected to the foam generator 9, the first valve 101 is arranged between the injection device 11 and the foam generator 9, and the fire water pool / foam pool 12 is connected to the injection device 11. Specifically, Figure 1 As shown, the spray device 11 is connected to the foam generator 9 and is used to spray the fire water / fire foam transmitted by the foam generator 9. The first valve 101 is connected between the foam generator 9 and the spray device 11 and is used to control whether to transmit the fire water / fire foam generated by the foam generator 9 to the spray device 11. The fire water pool / foam pool 12 is connected to the spray device 11 and is used to store fire water / fire foam.

[0076] In one embodiment, Figure 1 As shown, the circulation device includes: a second valve 102, a third valve 103, a circulating water pump 13, and a circulating compressor 14, wherein the fire water pool / foam pool 12 is connected to the circulating water pump 13 and the circulating compressor 14 respectively, the second valve 102 is arranged between the fire water pool / foam pool 12 and the circulating water pump 13, and the third valve 103 is arranged between the fire water pool / foam pool 12 and the circulating compressor 14. Specifically, Figure 1 As shown, the second valve 102 is arranged between the fire water pool / foam pool 12 and the circulating water pump 13, and is used to control whether the circulating water pump 13 can pump out fire water / fire foam from the fire water pool / foam pool 12. The third valve 103 is arranged between the fire water pool / foam pool 12 and the circulating compressor 14, and is used to control whether the circulating compressor 14 can pump out fire water / fire foam from the fire water pool / foam pool 12.

[0077] In one embodiment, Figure 1 As shown, the circulation device includes: a cooling device 15, wherein one end of the cooling device 15 is connected between the first valve 101 and the injection device 11, and the other two ends are respectively connected to the circulating water pump 13 and the circulating compressor 14. Specifically, the cooling device 15 is respectively connected to the circulating water pump 13 and the circulating compressor 14, and is used to receive the fire water / fire foam output by the circulating water pump 13 and the circulating compressor 14. The cooling device 15 is also connected between the first valve 101 and the injection device 11, and is used to deliver the cooled fire water / fire foam to the injection device 11.

[0078] Figure 2 A flow chart of the steps of a water / foam cycle test method according to an embodiment of the present invention is shown.

[0079] like Figure 2As shown, in step S201, fire water / fire foam is generated by a circulation device according to test requirements.

[0080] In step S201, for water spray fire fighting equipment, Figure 1 As shown, the first valve 101 is opened, the second valve 102 is opened, the fire-fighting equipment water pump 6 is opened, and the fire-fighting water in the fire-fighting equipment water tank 4 is pumped out. The fire-fighting water passes through the fire-fighting equipment foam proportioning mixer 8 and the fire-fighting equipment foam generator 9, and enters the fire-fighting equipment injection device 11 through the first valve 101. After passing through the injection device 11, the fire-fighting water enters the fire-fighting water pool / foam pool 12, and then passes through the second valve 102 to enter the circulating water pump 13. The circulating water pump 13 is opened, and the fire-fighting water passes through the circulating water pump 13 and enters the cooling device 15 to achieve the cooling of the fire-fighting water. The fire-fighting water enters the pipeline between the first valve 101 and the fire-fighting equipment injection device 11 through the circulating pipeline. At this time, the fire-fighting equipment water pump 6 and the first valve 101 are closed to realize the circulation of the fire-fighting water.

[0081] In step S201, for foam firefighting equipment, Figure 1 As shown, the first valve 101 is opened, the third valve 103 is opened, the fire-fighting equipment fire water pump 6 and the fire-fighting equipment foam liquid pump 7 are opened, the fire-fighting water in the fire-fighting equipment water tank 4 and the foam liquid in the fire-fighting equipment foam liquid tank 5 are pumped out, and the fire-fighting water and the foam liquid are mixed in the fire-fighting equipment foam proportioning mixer 8. The mixed foam liquid flows through the fire-fighting equipment foam generator 9 to foam to form foam, and then passes through the fire-fighting equipment injection device 11 and is sprayed into the fire-fighting water pool / foam pool 12, and then passes through the third valve 103 and enters the circulation compressor 14, is pressurized by the circulation compressor 14, enters the cooling device 15, and realizes the cooling of the foam, and finally enters the pipeline between the first valve 101 and the fire-fighting device injection device 11 through the circulation pipeline. At this time, the fire-fighting equipment water pump 6, the fire-fighting equipment foam liquid pump 7 and the first valve 101 are closed to realize the circulation of the fire-fighting foam.

[0082] like Figure 2 As shown, in step S202, fire water / fire foam is sprayed to the target spraying object through the water spraying device 3 connected to the circulation device.

[0083] like Figure 2 As shown, in step S203 , the maximum heat radiation value that the water / foam circulation system 100 can withstand during the specified working time is determined, and the maximum heat radiation value is recorded as the heat radiation tolerance limit value of the water / foam circulation system 100 .

[0084] Figure 3 A flow chart showing steps of a method for determining a heat radiation tolerance limit value of a water / foam circulation system according to an embodiment of the present invention is shown.

[0085] In one embodiment, the heat radiation tolerance limit value of the water / foam circulation system 100 is determined through steps S301 - S304 .

[0086] like Figure 3 As shown, in step S301, in a test state, a petrochemical pool fire and / or a jet fire is simulated, so that the water / foam circulation system 100 is subjected to a preset heat radiation value and maintained unchanged.

[0087] Specifically, in step S301, after the fire water / foam circulation is realized, in the test state, a water sprinkler device 3 and a thermal radiation measurement system 21 are arranged in front of the circulation device, and a simulated fire system 1 is arranged in front of the thermal radiation measurement system 21. According to the test requirements, the power of the simulated fire system 1 is adjusted, and the thermal radiation received by the water / foam circulation system 100 is measured by the thermal radiation measurement system 21 until the requirements are met; according to the test requirements, the water sprinkler device 3 can be turned on or off.

[0088] like Figure 3 As shown, in step S302, the fire water / fire foam is circulated through the water / foam circulation system 100, the circulation time of the fire water / fire foam is recorded, and the state of the fire water / fire foam at the outlet of the fire water pool / foam pool 12 when the injection device 11 of the water / foam circulation system 100 enters the circulation time is observed.

[0089] Specifically, in step S302, the power of the simulated fire system 1 is adjusted to make the water / foam circulation system 100 receive a certain heat radiation value, and then remain unchanged. The fire water / fire foam is made to circulate, and the working time T of the water / foam circulation system 100 is recorded as the circulation time, and the state of the fire water / fire foam at the outlet of the spray device 11 of the water / foam circulation system 100 entering the fire water / foam pool 12 is observed.

[0090] like Figure 3 As shown, in step S303, at the end of the cycle time, it is determined whether the fire water / fire foam at the outlet of the spray device 11 entering the fire water pool / foam pool 12 is vaporized.

[0091] like Figure 3 As shown, in step S304, the thermal radiation value received by the water / foam circulation system 100 is changed multiple times, the thermal radiation when the fire water / fire foam begins to vaporize is recorded as the tolerance thermal radiation limit value, and the time from the start of circulation to vaporization of the fire water / fire foam is recorded as the tolerance thermal radiation limit time.

[0092] Specifically, in steps S303-S304, at time T, it is determined whether the fire water / foam is vaporized, and the heat radiation value received by the water / foam circulation system 100 is changed multiple times to cancel the heat radiation when the fire water / foam begins to vaporize as the critical heat radiation. In this way, the real fire resistance performance of the water / foam circulation system 100 can be obtained.

[0093] The water / foam circulation system 100 provided by the present invention can realize water / foam circulation, can determine the thermal radiation tolerance limit value of the water / foam circulation system through a water / foam circulation test method, can perform fire resistance property tests on fire-fighting equipment, realize long-term fire resistance tests on fire-fighting equipment, and obtain true fire resistance properties.

[0094] Figure 4 A structural block diagram of a fire-fighting equipment with a self-protection function according to an embodiment of the present invention is shown.

[0095] A firefighting equipment with a self-protection function comprises: a water / foam circulation system 100 and a self-protection system 200. The self-protection system 200 is used to determine the self-protection spray flow rate according to the real-time thermal radiation value of the location of the water / foam circulation system 100.

[0096] In one embodiment, Figure 4 As shown, the self-protection system 200 includes: a heat flow sensor 22 and a computing terminal 16. The heat flow sensor 22 is used to detect the thermal radiation value of the location of the water / foam circulation system 100. The computing terminal 16 calculates the self-protection spray flow rate based on the thermal radiation value detected by the heat flow sensor 22.

[0097] Specifically, if Figure 4 As shown, the heat flux sensor 22 detects that the heat radiation at the location of the fire-fighting equipment is R, and the computing terminal 16 calculates the self-protection spray flow q of the fire-fighting equipment according to the protection mechanism of the self-protection system 200 for the fire-fighting equipment.

[0098] In one embodiment, Figure 4 As shown, the self-protection system 200 includes: a control system 18 and a self-spraying system 17, wherein the control system 18 is used to control the self-spraying system 17 to perform self-protection spraying according to the self-protection spraying flow rate.

[0099] In one embodiment, the thermal flow sensor 22 is placed on the fire-fighting equipment or fire truck at the position closest to the fire source; the computing terminal 16 and the control system 18 are arranged in the cab of the fire truck; the sprinkler system 17 is arranged next to the thermal flow sensor 22, and the nozzle opens upward, and the falling water curtain forms a water curtain between the fire-fighting equipment or fire truck and the fire source.

[0100] Specifically, if Figure 4As shown, the control system 18 controls the self-spraying system 17 according to the self-protection spraying flow q of the fire-fighting equipment to spray the spraying water of the flow rate to reduce the temperature of the fire-fighting equipment and protect the fire-fighting equipment.

[0101] In practical applications, the present invention belongs to fire-fighting equipment with a self-protection function, and the fire-fighting equipment is provided with a heat flow sensor 22, a computing terminal 16, a self-sprinkling system 17 and a control system 18. Specifically, the heat flow sensor 22 detects that the heat radiation at the location of the fire-fighting equipment is R, and the computing terminal 16 calculates the self-protection spray flow rate q of the fire-fighting equipment according to the protection mechanism of the self-protection system 200 for the fire-fighting equipment, and controls the self-sprinkling system 17 through the control system 18 to spray the spray water of the flow rate.

[0102] The present invention is equipped with a self-protection system 200, which can determine the self-protection spray flow rate according to the thermal radiation value of the location of the water / foam circulation system 100; in practical applications, the present invention can control the self-protection spray flow rate of fire-fighting equipment in real time to avoid wasting excessive water resources.

[0103] According to another aspect of the present invention, a fire truck is provided, comprising a fire fighting equipment with a self-protection function. The fire truck provided by the present invention can use the self-protection system 200 to spray the fire fighting equipment for self-protection during the actual fire extinguishing process.

[0104] Figure 5 A structural block diagram of a thermal radiation and spray flow testing system according to an embodiment of the present invention is shown.

[0105] A thermal radiation and spray flow test system comprises: a fire-fighting equipment with a self-protection function and a test device 300. The test device 300 is used to simulate a petrochemical pool fire and / or a jet fire and measure the thermal radiation value received by the fire-fighting equipment.

[0106] In one embodiment, Figure 5 As shown, the test equipment 300 includes: a simulated fire system 1 and a thermal radiation measurement system 21 .

[0107] Specifically, the simulated fire system 1 is used to simulate a petrochemical pool fire and / or a jet fire in a test state. The thermal radiation measurement system 21 is used to measure the thermal radiation received by the water / foam circulation system 100 or the fire fighting equipment in a test state.

[0108] Furthermore, in one embodiment, the simulated fire system 1 may adopt a simulated fire system in the prior art (a testing system for fire resistance of petrochemical components, CN113030369A).

[0109] In actual use, according to Figure 2After the fire water / foam circulation is realized by the method shown, in the test state, a water sprinkler device 3 and a thermal radiation measuring system 21 are arranged in front of the circulation device, and a simulated fire system 1 is arranged in front of the thermal radiation measuring system 21.

[0110] A thermal radiation and spray flow testing system proposed in the present invention can realize the fire resistance performance test of foam / water fire fighting equipment under the condition of continuous foam / water circulation, truly obtain the limit value and time of the fire fighting equipment's tolerance to thermal radiation, and determine the protection mechanism of the self-protection system 200 for the water / foam circulation system 100.

[0111] Figure 6 A flowchart of the steps of a method for designing fire-fighting equipment with a self-protection function according to an embodiment of the present invention is shown.

[0112] like Figure 6 As shown, in step S601, under the test state, a thermal radiation and spray flow test system is used to simulate a petrochemical pool fire and / or a jet fire.

[0113] Specifically, in step S601, Figure 2 The method shown realizes the fire water / fire foam circulation. After the fire water / foam circulation is realized, in the test state, a water sprinkler device 3 and a thermal radiation measurement system 21 are arranged in front of the circulation device, and a simulated fire system 1 is arranged in front of the thermal radiation measurement system 21. According to the test requirements, the power of the simulated fire system 1 is adjusted, and the thermal radiation received by the water / foam circulation system 100 is measured by the thermal radiation measurement system 21 until the requirements are met.

[0114] like Figure 6 As shown, in step S602, the water sprinkler device 3 is turned on, and the heat radiation value received by the fire-fighting equipment under different sprinkler flow rates of the water sprinkler device 3 is measured by the test system.

[0115] Specifically, in step S602, when the fire fighting equipment has water sprinkler protection, the water sprinkler 3 is turned on, and the water sprinkler 3 is turned on according to the same Figure 3 The same method as the steps shown is used to test the heat radiation value that the fire-fighting equipment can withstand under a certain fixed sprinkler protection flow rate.

[0116] like Figure 6 As shown, in step S603, based on the relationship between the heat radiation value received by the fire-fighting equipment and the spray flow rate, combined with the heat radiation tolerance limit value and heat radiation tolerance limit time of the water / foam circulation system 100, the protection mechanism of the self-protection system 200 for the fire-fighting equipment is determined.

[0117] Specifically, in step S603, different spraying flows are changed to obtain the corresponding heat radiation tolerance value of the fire-fighting equipment, and the relationship curve between the heat radiation tolerance value of the fire-fighting equipment and the spraying flow is obtained to determine the protection mechanism of the self-protection system 200 for the fire-fighting equipment. For example, the relationship curve between the heat radiation tolerance value of the fire-fighting equipment and the spraying flow is R=25q+39, then when the heat flow sensor 22 detects that the current heat radiation value of the fire-fighting equipment is R, the computing terminal 16 calculates the self-protection spraying flow q, and the control system 18 controls the self-protection spraying system 17 to perform self-protection spraying according to the self-protection spraying flow q.

[0118] In one embodiment, the protection mechanism of the self-protection system 200 for the firefighting equipment is determined by the following expression:

[0119] R=k×q+b

[0120] Wherein, R is the heat radiation value received by the fire-fighting equipment; k is the coefficient; q is the spray flow rate of the water spray device (3), L / (min.m2); and b is the heat radiation tolerance limit value of the water / foam circulation system (100).

[0121] The present invention can test the relationship between the spray flow rate of fire-fighting equipment and the tolerance to thermal radiation, thereby obtaining the self-protection spray flow rate of the fire-fighting equipment at that position, realizing automatic calculation and control of the fire-fighting equipment spray protection water, and reducing the waste of water resources.

[0122] The fire-fighting equipment and design method with a self-protection function provided by the present invention can also be used in conjunction with a computer-readable storage medium, on which a computer program is stored. The computer program is executed to run a water / foam circulation test method and a fire-fighting equipment design method with a self-protection function.

[0123] A computer program can run computer instructions, which include computer program code. The computer program code may be in source code form, object code form, executable file, or some intermediate form.

[0124] Computer-readable storage media may include: any entity or device that can carry computer program code, recording media, USB flash drives, mobile hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0125] It should be noted that the content contained in computer-readable storage media can be appropriately increased or decreased based on the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, based on legislation and patent practices, computer-readable storage media do not include electrical carrier signals and telecommunications signals.

[0126] In one embodiment, a thermal radiation and spray flow testing system proposed in the present invention can be used to implement fire resistance performance testing of foam / water fire fighting equipment under foam / water continuous circulation conditions, and truly obtain the limit value and time of the fire fighting equipment's tolerance to thermal radiation.

[0127] For fire water / cannon, the rated flow rate is 100L / s and the rated pressure is 0.8MPa. Open the first valve 101, open the second valve 102, open the fire equipment water pump 6, and pump out the fire water in the fire equipment water tank 4. The fire water passes through the fire equipment foam proportioning mixer 8 and the fire equipment foam generator 9, and passes through the first valve 101 to enter the fire equipment injection device 11. After passing through 11, the fire water enters the fire water pool / foam pool 12, and then passes through the second valve 102 to enter the circulating water pump 13. Turn on the circulating water pump 13, and the fire water passes through the circulating water pump 13 to enter the cooling device 15 to achieve the cooling of the fire water, and enters the pipeline between the first valve 101 and the fire equipment injection device 11 through the circulation pipeline. At this time, close the fire equipment water pump 6 and the first valve 101 to achieve the circulation of fire water / fire foam.

[0128] After the fire water / foam circulation is realized, the thermal radiation measurement system 21 is set up, and the simulated fire system 1 is arranged in front of the thermal radiation measurement system.

[0129] According to the test requirements, the power of the simulated fire system 1 is adjusted, and the heat radiation received by the fire fighting equipment is measured by the heat radiation measurement system 21, so that the measured value is 30kW / m 2 , and then keep it unchanged, let the fire water / foam circulate, cancel the working time of the fire protection equipment 2h as the circulation time, observe the outlet of the fire monitor 11 entering the fire water / foam pool 12, at 2h, the fire water / foam has not been gasified; according to 0.5kW / m 2 Increase the intervals gradually, gradually increase the heat radiation generated by the fire system, and repeat the test to see if it is gasified, until 39kW / m 2 When the water starts to vaporize, the fire fighting equipment can withstand a heat radiation of 39kW / m 2 .

[0130] When the fire-fighting equipment is protected by water spray, the water spray device 3 is turned on, and the heat radiation value that the fire-fighting equipment can withstand under a fixed spray protection flow rate is tested in the same way.

[0131] By changing different spray flow rates, the corresponding heat radiation tolerance value of the fire-fighting equipment is obtained, and the relationship curve between the heat radiation tolerance value of the fire-fighting equipment and the spray flow rate is obtained, R=25q+39. q is the spray flow rate, L / (min.m2).

[0132] In actual application, the heat flux sensor 22 detects that the heat radiation at the location of the fire-fighting equipment is R. The computing terminal 16 calculates the spraying flow of the fire-fighting equipment based on the relationship curve between the heat radiation tolerance value of the fire-fighting equipment and the spraying flow, and controls the self-spraying system 17 through the control system 18 to spray the spraying water of the flow. A 5000 cubic meter diesel tank with a diameter of 21m and a height of 16.5m has a full-area fire. When the distance from the center of the liquid pool is 13m, the heat radiation intensity is 49kW / m 2 At this time, the self-protection water spray flow rate is 0.4L / (min.m2).

[0133] In one embodiment, a 5000 cubic meter diesel tank with a diameter of 21 meters and a height of 16.5 meters caught fire in the entire area. When the distance from the center of the liquid pool was 12 meters, the heat radiation intensity was 64kW / m 2 At this time, the self-protection water spray flow rate is 1L / (min.m2).

[0134] In one embodiment, a 5000 cubic meter diesel tank with a diameter of 21 meters and a height of 16.5 meters caught fire in the entire area. When the distance from the center of the liquid pool was 11 meters, the heat radiation intensity was 109 kW / m 2 At this time, the self-protection water spray flow rate is 2.8L / (min.m2).

[0135] In summary, the present invention provides a fire-fighting equipment with a self-protection function and a design method, which has the following advantages compared with the prior art:

[0136] (1) The water / foam circulation system provided by the present invention can realize water / foam circulation, and the heat radiation tolerance limit value of the water / foam circulation system can be determined by a water / foam circulation test method;

[0137] (2) The fire-fighting equipment with self-protection function provided by the present invention is equipped with a self-protection system, which can spray the fire-fighting equipment for self-protection;

[0138] (3) The present invention also provides a fire truck that can use a self-protection system to spray fire-fighting equipment for self-protection during the actual fire-fighting process;

[0139] (4) The thermal radiation and spray flow rate testing system provided by the present invention has the ability to simulate fire and measure thermal radiation. It can determine the protection mechanism of the self-protection system for fire-fighting equipment based on the relationship between the thermal radiation value received by the fire-fighting equipment and the spray flow rate, combined with the thermal radiation tolerance limit value and thermal radiation tolerance limit time of the water / foam circulation system through the fire-fighting equipment design method with self-protection function;

[0140] (5) In practical applications, the present invention can control the self-protection spray flow of fire-fighting equipment in real time to avoid wasting excessive water resources.

[0141] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0142] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0143] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0144] Certain terms are used throughout this application document to indicate specific system components. As those skilled in the art will recognize, different names can usually be used to indicate the same components, so this application document is not intended to distinguish those components that are only different in name but not in function. In this application document, the terms "comprise", "include" and "have" are used in an open form, and therefore should be interpreted as meaning "including but not limited to...". In addition, the terms "substantially", "substantially" or "approximately" that may be used in this article relate to the tolerances of the corresponding terms accepted by the industry. The term "coupling" as may be used in this article includes direct coupling and indirect coupling via other components, elements, circuits, or modules, wherein for indirect coupling, the components, elements, circuits, or modules between them do not change the information of the signal but can adjust its current level, voltage level, and / or power level. Inferred coupling (for example, one of the elements is coupled to another element by inference) includes direct and indirect coupling between two elements in the same way as "coupling".

[0145] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0146] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0147] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A water / foam circulation system, characterized in that: The water / foam circulation system (100) comprises: A circulation device, which is used to generate fire water / fire foam according to test requirements; A water spray device (3) is connected to the circulation device and is used to spray fire water / fire foam to a target spray object.

2. A water / foam circulation system as claimed in claim 1, characterized in that: The circulation device comprises: a water tank (4), a foam liquid tank (5), a water pump (6), and a foam liquid pump (7), wherein the water pump (6) is connected to the water tank (4), and the foam liquid pump (7) is connected to the foam liquid tank (5).

3. A water / foam circulation system as claimed in claim 2, characterized in that: The circulation device comprises: a foam proportion mixer (8) and a foam generator (9), wherein the foam proportion mixer (8) is connected to a water pump (6) and a foam liquid pump (7) respectively, and the foam generator (9) is connected to the foam proportion mixer (8).

4. A water / foam circulation system as claimed in claim 3, characterized in that: The circulation device comprises: a first valve (101), a spray device (11), and a fire water pool / foam pool (12), wherein the spray device (11) is connected to a foam generator (9), the first valve (101) is arranged between the spray device (11) and the foam generator (9), and the fire water pool / foam pool (12) is connected to the spray device (11).

5. A water / foam circulation system as claimed in claim 4, characterized in that: The circulation device comprises: a second valve (102), a third valve (103), a circulating water pump (13), and a circulating compressor (14), wherein the fire water pool / foam pool (12) is connected to the circulating water pump (13) and the circulating compressor (14) respectively, the second valve (102) is arranged between the fire water pool / foam pool (12) and the circulating water pump (13), and the third valve (103) is arranged between the fire water pool / foam pool (12) and the circulating compressor (14).

6. A water / foam circulation system as claimed in claim 5, characterized in that: The circulation device comprises: a cooling device (15), wherein one end of the cooling device (15) is connected between the first valve (101) and the injection device (11), and the other two ends are respectively connected to the circulation water pump (13) and the circulation compressor (14).

7. A water / foam cycle test method, characterized in that: Executed by the water / foam circulation system (100) according to any one of claims 1 to 6, the method comprises: According to the test requirements, firefighting water / firefighting foam is generated by the circulation device; Spraying fire water / fire foam to the target spraying object through a water spraying device (3) connected to the circulation device; The maximum heat radiation value that the water / foam circulation system (100) can withstand during a specified period of operation is determined, and the maximum heat radiation value is recorded as the heat radiation tolerance limit value of the water / foam circulation system (100).

8. A water / foam cycle test method as claimed in claim 7, characterized in that: The heat radiation tolerance limit of the water / foam circulation system (100) is determined by the following steps: Under the test conditions, a petrochemical pool fire and / or jet fire is simulated, and the water / foam circulation system (100) is subjected to a preset heat radiation value and maintained unchanged; The fire-fighting water / fire-fighting foam is circulated through the water / foam circulation system (100), the circulation time of the fire-fighting water / fire-fighting foam is recorded, and the state of the fire-fighting water / fire-fighting foam at the outlet of the spraying device (11) of the water / foam circulation system (100) entering the fire-fighting water pool / foam pool (12) during the circulation time is observed; At the end of the cycle time, determining whether the fire water / fire foam at the outlet of the spray device (11) entering the fire water pool / fire foam pool (12) is gasified; The heat radiation value received by the water / foam circulation system (100) is changed multiple times, and the heat radiation at which the fire-fighting water / fire-fighting foam begins to vaporize is recorded as the heat radiation tolerance limit value, and the time from the start of the fire-fighting water / fire-fighting foam circulation to the vaporization is recorded as the heat radiation tolerance limit time.

9. A storage medium, characterized in that: It contains a series of instructions for executing the method steps as claimed in claim 7 or 8.

10. A fire-fighting equipment with self-protection function, characterized in that: The fire fighting equipment includes: The water / foam circulation system (100) according to any one of claims 1 to 6; The self-protection system (200) is used to determine the self-protection spray flow rate according to the real-time thermal radiation value of the location where the water / foam circulation system (100) is located.

11. The fire-fighting equipment with self-protection function as claimed in claim 10, characterized in that: The self-protection system (200) comprises: A heat flow sensor (22) for detecting a real-time heat radiation value at a location where the water / foam circulation system (100) is located; A calculation terminal (16) calculates the self-protection spray flow rate based on the real-time thermal radiation value detected by the thermal flow sensor (22).

12. A fire-fighting equipment with self-protection function as claimed in claim 10 or 11, characterized in that: The self-protection system (200) comprises: a control system (18) and a self-spraying system (17), wherein the control system (18) is used to control the self-spraying system (17) to perform self-protection spraying according to the self-protection spraying flow rate.

13. A fire truck, characterized in that: The fire truck comprises the fire fighting equipment according to any one of claims 10-12.

14. A thermal radiation and spray flow test system, characterized in that: The test system comprises: The fire fighting equipment according to any one of claims 10 to 12; A test device (300) is used to simulate a petrochemical pool fire and / or a jet fire and measure the heat radiation value to which the fire fighting equipment is exposed.

15. The thermal radiation and spray flow rate testing system according to claim 14, wherein the testing device (300) comprises: A simulated fire system (1) for simulating a petrochemical pool fire and / or a jet fire under test conditions; A thermal radiation measuring system (21) is used to measure the thermal radiation received by the fire fighting equipment under test.

16. A method for designing firefighting equipment with self-protection function, characterized in that: The method comprises: In the test state, a petrochemical pool fire and / or a jet fire is simulated by a test system according to claim 14 or 15; The water spray device (3) is turned on, and the test system is used to measure the heat radiation value received by the fire-fighting equipment at different spray flow rates of the water spray device (3). Based on the relationship between the heat radiation value received by the fire-fighting equipment and the spray flow rate, combined with the heat radiation tolerance limit value and heat radiation tolerance limit time of the water / foam circulation system (100), the protection mechanism of the self-protection system (200) for the fire-fighting equipment is determined.

17. A method for designing firefighting equipment with self-protection function as claimed in claim 16, characterized in that: The protection mechanism of the self-protection system (200) for the fire-fighting equipment is determined by the following expression: R=k×q+b Wherein, R is the heat radiation value received by the fire-fighting equipment; k is the coefficient; q is the spray flow rate of the water spray device (3), L / (min.m2); and b is the heat radiation tolerance limit value of the water / foam circulation system (100).

18. A storage medium, characterized in that: It contains a series of instructions for executing the method steps as claimed in any one of claims 16-17.

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