CN107823821B - Water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time and application method thereof - Google Patents
Water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time and application method thereof Download PDFInfo
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- CN107823821B CN107823821B CN201711285785.1A CN201711285785A CN107823821B CN 107823821 B CN107823821 B CN 107823821B CN 201711285785 A CN201711285785 A CN 201711285785A CN 107823821 B CN107823821 B CN 107823821B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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Abstract
A water mist fire extinguishing system and an application method capable of accurately mixing fire extinguishing liquid in real time, wherein the system comprises a water tank, a water mist pump set and a water mist nozzle which are sequentially communicated through a pipeline, and further comprises a fire extinguishing liquid instant mixing system, wherein the fire extinguishing liquid instant mixing system comprises a pressure reducing and taking device, a fire extinguishing liquid capsule tank, a flow regulating device and a fire extinguishing liquid mixer which are sequentially communicated; the inlet of the pressure reducing and taking device is communicated with the water outlet of the water mist pump set, and the fire extinguishing fluid mixer is communicated with the water outlet of the water tank and the water inlet of the water mist pump set; and part of high-pressure water output by the water mist pump set flows through the fire-extinguishing fluid capsule tank after being decompressed by the pressure-reducing and pressure-taking device, the fire-extinguishing fluid in the fire-extinguishing fluid capsule tank is extruded out at constant pressure, is output in proportion by the flow regulating device to be accurately mixed with water in the fire-extinguishing fluid mixer, and is pressurized by the water mist pump set and then is sprayed out at high pressure. The fire extinguishing system has the advantages of simple structure, simplicity and convenience in operation, high mixing precision, high stability, good economy and the like.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time and an application method thereof.
Background
The water mist is a high-efficiency fire extinguishing technology, which utilizes a high-pressure water pump set and a water mist nozzle to decompose water flow into water with a diameter Dv under higher water pressure 50 Less than 200
、Dv 99 Less than 400
The water mist drops are used for extinguishing fire. In recent years, in order to further improve the fire extinguishing effect of water mist, water-based fire extinguishing fluid is premixed into water as a water mist additive and then refined into water mist to extinguish fire. However, most of these water-based fire extinguishing liquids are composed of basic salts (see the paper)Fire Safety Journal41 (2006) 39-45), fluorocarbon surfactants (as in the article)Procedia Engineering45 (2012), 649-654) and the like, which have certain corrosiveness, and can cause serious corrosion to water mist pump sets, water tanks, pipelines, valves and the like after long-term storage. Therefore, a need exists for a water mist fire suppression system that can accurately mix fire suppression fluid in real time. When the fire extinguishing system is not used for extinguishing fire at ordinary times, the fire extinguishing liquid and the water mist system are separated, and the fire extinguishing liquid does not corrode equipment and pipelines.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water mist fire extinguishing system which has the advantages of simple structure, simple and convenient operation, high mixing precision, high stability, good economy, long service life of equipment and capability of realizing real-time accurate mixing of water mist and fire extinguishing liquid in the fire extinguishing process and an application method thereof.
A water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time comprises a water tank, a water mist pump set and a water mist nozzle which are sequentially communicated through a pipeline, and further comprises a fire extinguishing liquid instant mixing system, wherein the fire extinguishing liquid instant mixing system comprises a pressure reducing and taking device, a fire extinguishing liquid capsule tank, a flow regulating device and a fire extinguishing liquid mixer which are sequentially communicated; the inlet of the pressure reducing and taking device is communicated with the water outlet of the water mist pump set, and the fire extinguishing fluid mixer is communicated with the water outlet of the water tank and the water inlet of the water mist pump set; and part of high-pressure water output by the water mist pump set flows through the fire-extinguishing fluid capsule tank after being decompressed by the decompression and pressure-taking device, the fire-extinguishing fluid in the fire-extinguishing fluid capsule tank is extruded at constant pressure, is output in proportion by the flow regulating device, is accurately mixed with water in the fire-extinguishing fluid mixer, and is pressurized by the water mist pump set and then is sprayed out at high pressure.
As a further improvement of the above technical solution:
preferably, a flow meter, a one-way valve and a switch valve are sequentially arranged on a communication pipeline between the flow regulating device and the fire extinguishing fluid mixer; and a safety valve is arranged on a pipeline communicated with the pressure reducing and taking device and the fire extinguishing liquid capsule tank.
Preferably, the water mist pump set is a plunger pump, the pressurizing pressure of the plunger pump is 1.5-16.0 MPa, and the pressure reducing and pressure taking device reduces the pressure of high-pressure water to the pressure of low pressure, wherein the pressure is 0.35-1.5MPa.
Preferably, the pressurization pressure is 2.5 to 10.0MPa, and the low pressure is 0.5 to 1.0MPa.
Preferably, the fire extinguishing liquid is a water-soluble fire extinguishing agent and comprises NaCl, KCl and KHCO in an alkali metal salt aqueous solution 3 And hydrocarbon surfactant, fluorocarbon surfactant in the organic surfactant aqueous solution; the mixing ratio of the fire extinguishing liquid and the water is 0.2 to 6 percent.
Preferably, the pressure reducing and taking device adopts one or a combination of a pressure reducing and stabilizing valve, an electric pressure regulating valve and a self-operated pressure regulating valve.
Preferably, the flow regulating device adopts one or a combination of a plurality of self-operated flow control valves, electric control flow control valves, pneumatic control flow regulating valves, proportional valves and static flow balance valves.
Preferably, fire-extinguishing fluid capsule tank is bilayer structure, including the capsule layer and the outer shell of nexine, the play water end of step-down pressure-taking device passes through the intermediate layer intercommunication between pipeline and capsule layer and the shell, and the intraformational fire-extinguishing fluid of capsule is exported after the extrusion of the interbedded constant pressure low pressure water that flows into.
Preferably, the fire-extinguishing fluid mixer is one of a pipeline mixer, a vortex mixer, a static mixer and a Venturi mixer.
The invention also discloses an application method of the water mist fire extinguishing system, which comprises the following steps:
firstly, adjusting a pressure reduction and taking device to a design pressure;
then calculating to obtain the total flow of water for fire extinguishing according to the quantity and the flow of the water mist nozzles;
and finally, regulating the constant-pressure replacement amount of the fire-extinguishing liquid by regulating a flow regulating device according to the set mixing ratio of the fire-extinguishing liquid and the total flow of the fire-extinguishing water to obtain the water mist mixed with the fire-extinguishing liquid in a fixed ratio, so that the mixed application of the fire-extinguishing liquid and water is realized.
Compared with the prior art, the invention has the advantages that:
1. the water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time is characterized in that a pressure reducing and taking device, a fire extinguishing liquid capsule tank and a flow regulating device are sequentially connected and then are combined to an outlet and an inlet of a water mist pump set, the flow regulating device can accurately control the flow of the fire extinguishing liquid, and the fire extinguishing liquid with a fixed mixing ratio is obtained so as to adapt to different fire extinguishing places and different fire extinguishing water flows. Partial high-pressure water of the fine water mist pump set flows through the fire-extinguishing fluid capsule tank after being decompressed by the decompression and pressure-taking device, the fire-extinguishing fluid in the fine water mist pump set is extruded out at constant pressure and is output in proportion by the flow regulating device to be accurately mixed with water in the fire-extinguishing fluid mixer, and the mixture is pressurized by the fine water mist pump set and then is sprayed out at high pressure, so that the instant accurate mixing of the fine water mist and the fire-extinguishing fluid in the fire-extinguishing process can be realized.
2. According to the water mist fire extinguishing system, the switch valve is arranged on the communication pipeline between the flow regulating device and the fire extinguishing liquid mixer, the switch valve is closed, the water mist pump group is opened, mixed fire extinguishing application of fire extinguishing liquid can be stopped, the fire extinguishing liquid mixing system is cleaned, and fire is extinguished by using water mist alone. A safety valve is arranged on a pipeline communicated with the pressure reducing and taking device and the fire extinguishing liquid capsule tank, so that the pressure safety of the fire extinguishing liquid tank can be ensured; when the pressure in the fire extinguishing liquid tank exceeds the safety upper limit of the safety valve, the safety valve starts to release the pressure, and the fire extinguishing liquid tank is protected.
In conclusion, the water mist fire extinguishing system can realize the instant mixing of the water mist and the fire extinguishing liquid in the fire extinguishing process, and has the advantages of simple structure, high mixing precision, high stability, good economy and the like. The application method of the invention is simple and convenient to operate.
Drawings
FIG. 1 is a schematic diagram of a water mist fire suppression system of the present invention with real-time precise mixing of fire suppression fluid.
Illustration of the drawings:
1. a water mist pump set; 2. a water tank; 3. a pressure reducing and taking device; 4. a safety valve; 5. a fire extinguishing liquid capsule tank; 6. fire extinguishing fluid; 7. a flow regulating device; 8. a flow meter; 9. a one-way valve; 10. a water mist spray head; 11. an on-off valve; 12. a fire extinguishing fluid mixer.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, the water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time according to the embodiment includes a water tank 2, a water mist pump set 1, a water mist nozzle 10 and a fire extinguishing liquid instant mixing system, wherein the water tank 2, the water mist pump set 1 and the water mist nozzle 10 are sequentially communicated through a pipeline, and the fire extinguishing liquid instant mixing system includes a pressure reducing and taking device 3, a fire extinguishing liquid capsule tank 5, a flow regulating device 7 and a fire extinguishing liquid mixer 12 which are sequentially communicated; the inlet of the pressure reducing and taking device 3 is communicated with the water outlet of the water mist pump set 1, and the fire extinguishing fluid mixer 12 is communicated with the water outlet of the water tank 2 and the water inlet of the water mist pump set 1; part of high-pressure water output by the water mist pump set 1 flows through the fire-extinguishing fluid capsule tank 5 after being decompressed by the decompression pressure-taking device 5, the fire-extinguishing fluid 6 in the fire-extinguishing fluid capsule tank is extruded out at constant pressure and is output in proportion by the flow regulating device 7 to be accurately mixed with water in the fire-extinguishing fluid mixer 12, and then is pressurized by the water mist pump set 1 and is sprayed out at high pressure. The invention can realize real-time accurate mixing of the water mist and the fire extinguishing liquid in the fire extinguishing process, and has the advantages of simple structure, simple and convenient operation, high mixing accuracy, high stability and good economical efficiency.
In the embodiment, a flow meter 8, a one-way valve 9 and a switch valve 11 are sequentially arranged on a communication pipeline between the flow regulating device 7 and the fire extinguishing fluid mixer 12; wherein the flowmeter is used for measuring the flow of the fire-extinguishing fluid to realize the adjustment of the flow of the fire-extinguishing fluid. The check valve is used for preventing water at the inlet of the water mist pump set from flowing into the fire extinguishing liquid tank. The switch valve can adopt one of a stop valve, a butterfly valve, a ball valve, an electromagnetic valve and an electric ball valve, and is used for stopping mixed fire extinguishing application of fire extinguishing liquid after being closed.
In this embodiment, the fire extinguishing fluid mixer 12 is one of a line mixer, a vortex mixer, a static mixer, and a venturi mixer. The flow regulating device 7 adopts one or a combination of a plurality of self-operated flow control valves, electric control flow control valves, pneumatic control flow regulating valves, proportional valves and static flow balance valves for accurately controlling the flow of fire extinguishing liquid so as to aim at different fire extinguishing places to use different fire extinguishing water flows. The method for adjusting the mixed flow of the fire-extinguishing fluid comprises the following steps of performing a correction test on the mixed flow before field application, wherein the correction process comprises the following steps: according to the designed fire extinguishing liquid mixing ratio and the pressure reduction and pressure taking pressure, aiming at different water mist fire extinguishing flows, the opening degree of the flow regulating device is obtained through tests, and the water mist and the fire extinguishing liquid with the designed mixing ratio are obtained.
In this embodiment, the pressure reducing and taking device 3 adopts one or a combination of a pressure reducing and stabilizing valve, an electric pressure regulating valve and a self-operated pressure regulating valve. A safety valve 4 is arranged on a pipeline communicated with the pressure reduction and taking device 3 and the fire extinguishing liquid capsule tank 5 and is used for ensuring the pressure safety of the fire extinguishing liquid tank; when the pressure in the fire-extinguishing fluid tank exceeds the safety upper limit of the safety valve, the safety valve starts to release the pressure, and the fire-extinguishing fluid tank is protected.
In this embodiment, fire-extinguishing fluid capsule jar 5 is bilayer structure, including the capsule layer and the outer shell of nexine, and the play water end of step-down pressure-taking device 3 passes through the intermediate layer intercommunication between pipeline and capsule layer and the shell, and the intraformational fire-extinguishing fluid 6 of capsule is exported after being extruded by the low pressure water of the constant pressure that flows into the intermediate layer. Because the pressure of the capsule which is extruded is constant, the output fire extinguishing liquid is basically constant, the stability is good, and the mixing precision is high.
In this embodiment, the water mist pump unit 1 is a plunger pump, and the pressurizing pressure thereof is 1.5 to 16.0 MPa (preferably 2.5 to 10.0 MPa), and the pressure reducing and pressure taking device 3 reduces the pressure of the high-pressure water to a low pressure of 0.35 to 1.5MPa (preferably 0.5 to 1.0 MPa).
In this embodiment, the fire-extinguishing liquid 6 is a water-soluble fire-extinguishing agent, including NaCl, KCl, KHCO in alkali metal salt water solution 3 And hydrocarbon surfactant, fluorocarbon surfactant in the organic surfactant aqueous solution; the mixing ratio of the fire extinguishing liquid 6 and the water which are accurately mixed is 0.2-6 percent and can be adjusted step by step.
The application method of the water mist fire extinguishing system for accurately mixing fire extinguishing liquid in real time comprises the following steps:
firstly, adjusting a pressure reducing and taking device 3 (a self-operated pressure adjusting valve group) to 0.8 MPa; and then calculating to obtain the total flow of the fire extinguishing water according to the quantity and the flow of the water mist spray heads. In this embodiment, 30 water mist nozzles are shared, and the flow rate of each nozzle is 10L/min, so the total flow rate of water mist for fire extinguishing is
。
According to the set mixing ratio of the fire extinguishing liquid of 5 percent and the total flow rate of the water for fire extinguishing of 300L/min, the mixing amount of the fire extinguishing liquid is known
. Therefore, by adjusting the flow adjusting device 7 (self-operated flow control valve bank), the valve bank opening with the mixing ratio of fire-extinguishing liquid of 5% is obtained through experiments, and the fire-extinguishing liquid and water mist mixed fire-extinguishing application with the mixing ratio of 5% is realized.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described examples. It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit of the invention.
Claims (9)
1. The utility model provides a can real-time accurate water mist fire extinguishing systems who mixes fire-extinguishing liquid, includes water pitcher (2), water mist pump group (1) and water mist nozzle (10) that communicate in proper order through the pipeline, its characterized in that: the system also comprises an instant fire-extinguishing liquid mixing system, wherein the instant fire-extinguishing liquid mixing system comprises a pressure reduction and taking device (3), a fire-extinguishing liquid capsule tank (5), a flow regulating device (7) and a fire-extinguishing liquid mixer (12) which are sequentially communicated; the inlet of the pressure reducing and taking device (3) is communicated with the water outlet of the water mist pump set (1), and the fire extinguishing fluid mixer (12) is communicated with the water outlet of the water tank (2) and the water inlet of the water mist pump set (1); part of high-pressure water output by the water mist pump set (1) is decompressed by the decompression pressure-taking device (5) and then flows through the fire-extinguishing liquid capsule tank (5), fire-extinguishing liquid (6) in the water mist pump set is extruded out at constant pressure and is output in proportion by the flow regulating device (7) to be accurately mixed with water in the fire-extinguishing liquid mixer (12), and then is pressurized by the water mist pump set (1) and then is sprayed out at high pressure;
a flow meter (8), a one-way valve (9) and a switch valve (11) are sequentially arranged on a communication pipeline between the flow regulating device (7) and the fire extinguishing fluid mixer (12); a safety valve (4) is arranged on a pipeline communicated with the pressure reducing and taking device (3) and the fire extinguishing liquid capsule tank (5); the one-way valve (9) is used for preventing water at the water inlet of the water mist pump set (1) from flowing into the fire extinguishing liquid capsule tank (5).
2. The water mist fire suppression system of claim 1, wherein: the water mist pump set (1) is a plunger pump, the pressurizing pressure of the water mist pump set is 1.5-16.0 MPa, and the pressure reducing and taking device (3) reduces the pressure of high-pressure water to the low pressure of 0.35-1.5MPa.
3. The water mist fire suppression system of claim 2, wherein: the pressurizing pressure is 2.5-10.0MPa, and the low pressure is 0.5-1.0MPa.
4. The water mist fire suppression system of claim 1, wherein: the fire extinguishing liquid (6) is a water-soluble fire extinguishing agent and comprises NaCl, KCl and KHCO3 in an alkali metal salt aqueous solution and a hydrocarbon surfactant and a fluorocarbon surfactant in an organic surfactant aqueous solution; the mixing ratio of the fire extinguishing liquid (6) and water which are accurately mixed is 0.2-6%.
5. The water mist fire suppression system of claim 1, wherein: the pressure reducing and taking device (3) adopts one or a combination of a pressure reducing and stabilizing valve, an electric pressure regulating valve and a self-operated pressure regulating valve.
6. The water mist fire suppression system of claim 1, wherein: the flow regulating device (7) adopts one or a combination of a plurality of self-operated flow control valves, electric control flow control valves, pneumatic control flow regulating valves, proportional valves and static flow balance valves.
7. The water mist fire suppression system of claim 1, wherein: fire-extinguishing fluid capsule jar (5) are bilayer structure, including the capsule layer and the outer shell layer of nexine, the play water end of step-down pressure-taking device (3) passes through the intermediate layer intercommunication between pipeline and capsule layer and the shell layer, and intraformational fire-extinguishing fluid of capsule (6) are exported after the extrusion of the low pressure water of constant pressure that flows into the intermediate layer.
8. The water mist fire suppression system of claim 1, wherein: the fire extinguishing fluid mixer (12) is one of a pipeline mixer, a vortex mixer, a static mixer and a Venturi mixer.
9. A method of using the water mist fire suppression system of claim 1, wherein: the method comprises the following steps: firstly, adjusting a pressure reduction and taking device (3) to a design pressure; then, calculating and obtaining the total flow of water for fire extinguishing according to the quantity and the flow of the water mist spray heads (10); and finally, according to the set mixing ratio of the fire-extinguishing liquid, the constant-pressure replacement amount of the fire-extinguishing liquid is adjusted by combining the total flow of the fire-extinguishing water and adjusting a flow adjusting device (7), so that the water mist mixed with the fire-extinguishing liquid in a fixed ratio is obtained, and the mixed application of the fire-extinguishing liquid and water is realized.
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| CN110926233B (en) * | 2019-12-04 | 2021-07-06 | 中国人民解放军火箭军工程大学 | Voltage stabilizing device for high-pressure water mist throttling system and voltage stabilizing control method thereof |
| CN111569312A (en) * | 2020-04-21 | 2020-08-25 | 杨根喜 | Constant-pressure spraying and mixing method and device for solid fire extinguishing composition |
| CN111840881B (en) * | 2020-09-03 | 2022-01-25 | 威特龙消防安全集团股份公司 | Preparation method of gel fire extinguishing agent |
| CN113521618A (en) * | 2021-06-17 | 2021-10-22 | 苏州步高电气科技有限公司 | High-pressure fine water spray fire extinguishing system suitable for multiple occasions |
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