CN102029030B - Method and device for generating foam in high-speed gas jet - Google Patents

Method and device for generating foam in high-speed gas jet Download PDF

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Publication number
CN102029030B
CN102029030B CN 200910035880 CN200910035880A CN102029030B CN 102029030 B CN102029030 B CN 102029030B CN 200910035880 CN200910035880 CN 200910035880 CN 200910035880 A CN200910035880 A CN 200910035880A CN 102029030 B CN102029030 B CN 102029030B
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foam
water
liquid film
jet
fire
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CN 200910035880
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CN102029030A (en
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姬永兴
尹志
程继国
刘凡
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Jiangsu Kawei Special Purpose Vehicle Manufacturing Co Ltd
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Jiangsu Kawei Special Purpose Vehicle Manufacturing Co Ltd
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Abstract

The invention discloses a method and a device for generating foam in high-speed gas jet. The method comprises the following steps of: jetting foam extinguishing fluid to form liquid film jet, impacting a liquid film by using high-speed airflow to tear the liquid film, mixing the torn liquid film and gas to generate foam beads so as to form foam jet which does not contain flowable liquid water. A turbojet fire fighting truck has the function of jetting a foam extinguishing agent, and extinguishing efficiency is greatly improved; when a foam jetting button is not pressed, the turbojet fire fighting truck jets gas-water mist jet to disperse toxic fume in a fire scene, control fire, cool the fire scene and rescue people in the fire scene; and when the foam jetting button is pressed, the turbojet fire fighting truck jets gas-foam jet to quickly extinguish large oil gas fire and prevent oil gas from reburing, so that the turbojet fire fighting truck with the jet power of thousands of kilowatts becomes truly large fire fighting equipment.

Description

In high-speed gas jet, generate the device of foam
Technical field
The invention belongs to fire-fighting domain, particularly a kind of method and device that in the high-speed gas jet of turbojet engine, foam fire-fighting liquid is generated foam.
Background technology
Turbojet fire engine serves as to spray power with the huge aviation turbojet engine of power; With the high-speed gas jet is carrier; Eject the thin jet spray of big flow high rate of fire, its injection capacity/complete vehicle quality is the maximum motor driven type fire-fighting equipment of injection capacity than surpassing 100 kilowatts/ton.Present many countries are used for putting out fast the oil gas big fire developing whirlpool spray fire plant, blow down toxic smog.For example, Hungary is installed in 2 P11 Φ-300 turbojet engines on the T-34 tank side by side, and high-speed gas jet cuts into thin jet spray with the direct current water of injecting, and becomes the huge whirlpool spray fire plant of injection capacity, is used for putting out fast the oil well big fire; Russia is installed in 1 BK-1 type turbojet engine on the truck chassis, sprays the spray water jet, becomes the turbojet fire engine of high maneuverability; Germany is installed in automobile chassis side by side with 2 retired La Zhake (Larzac) turbofans that are used for Alpha's jet trainer, sprays at a high speed thin water smoke, becomes the turbofan fire fighting truck.Spray fire plants in these whirlpools are putting out the oil gas big fire, are dispersing toxic smog that fire produces, aspect the cooling of the scene of a fire, are bringing into play important function.But they also exist an important shortcoming: can not the spray foam extinguishing chemical.This not only influences the further raising of its blow-off velocity, and must rely on and other foam truck combined operation, could stop the resume combustion of oil gas fire.
In conventional foam truck, air gets into spray gun mixes back generation foam with foam fire-fighting liquid method and is divided into negative pressure method, just three types of platen press, nethike embrane methods.These methods can not make foam fire-fighting liquid generate foam in the high-speed gas jet of turbojet engine, and this is the reason place that the countries in the world turbojet fire engine can not the spray foam extinguishing chemical.China is the country that develops turbojet fire engine the earliest; The method that 90101257.2 and the 200810019411.X patent of invention of China provides vortex jetting fire extinguisher and sprayed thin water smoke; Its nozzle also designs in high velocity air, spraying thin water smoke, does not relate to the injection method of fire foam.
Summary of the invention
The object of the present invention is to provide a kind of big flow foam fire-fighting liquid in high-speed gas jet, to generate the method and the device of foam, the big flow foam hose stream of its high rate of fire can instantaneous covering large tracts of land very, put out the oil gas fire fast and stop its resume combustion.
The technical solution that realizes the object of the invention is: a kind of method that in high-speed gas jet, generates foam; It is the shaped liquid film jet that foam fire-fighting liquid is sprayed; High velocity air and liquid film colliding; Liquid film is torn and is generated foam beads with the gas blending, becomes the foam hose stream that does not contain flowable aqueous water.
A kind of device of realizing the above-mentioned method of foam that in high-speed gas jet, generates is imported water in the water pump through conveyance conduit by water tank, and the import conveyance conduit of water pump also is connected with pump formula proportioner; Aqueous foam-forming solution or class A foam liquid from the foam solution case get in the import conveyance conduit of water pump through pump formula proportioner and electromagnetic switch; The mixed liquid of water after the water pump pressurization or water and foam gets in the liquid film nozzle through the annular duct road, injects in the air-water energy exchange spray tube with the shaped liquid film jet; With high velocity air bump from turbojet engine; Liquid film is torn, and generates the foam beads jet that does not contain flowable aqueous water with the gas blending, penetrates at a high speed.
The present invention compared with prior art, its remarkable advantage is: (1) makes turbojet fire engine have the means of spray foam extinguishing chemical, and fire-fighting efficiency significantly improves.When not pressing the spray foam button, turbojet fire engine ejects gas-thin jet spray and is used to disperse scene of a fire toxic smog, and the control intensity of a fire for scene of a fire cooling, is used for the scene of a fire and rescues the people; After pressing " spray foam " button, eject gas-foam hose stream, be used for putting out fast the oil gas big fire and stop its resume combustion, the turbojet fire engine that makes injection capacity reach thousands of kilowatts becomes real " giant " fire-fighting equipment.(2) invented MJPZ extinguishing chemical or class A foam extinguishing chemical sprayed and be the new method of foam hose stream; AFFF that turbojet fire engine ejects or class A foam pearl jet do not contain flowable aqueous water; Also be called as " dry foam "; Not only become the bubble rate high, and can form the large tracts of land foam blanket, the advantage that the big flow fire foam that ejects shrouds big fire in addition without trickling; Its high-speed jet has makes foam penetrate the ability in the flame, makes turbojet fire engine be suitable for putting out fast the big fire of petrochemical factory, booster station, gas station, oil gas well, aircraft etc. more.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is the present invention generates the device of foam in high-speed gas jet a general structure sketch map.
Fig. 2 is annular duct of the present invention road and the installation diagram of liquid film nozzle on air-water energy exchange spray tube.
Fig. 3 is the A-A cutaway view of Fig. 2 of the present invention.
Fig. 4 is a liquid film nozzle arrangements profile of the present invention.
Fig. 5 is the B-B cutaway view of Fig. 4 of the present invention.
Reference numeral and corresponding part thereof among the figure: water tank 1, water pump 2, conveyance conduit 3, proportioner 4, electromagnetic switch 5, fire foam case 6, liquid film nozzle 7, air-water energy exchange spray tube 8, annular duct road 9
The specific embodiment
The present invention generates the method for foam in high-speed gas jet, foam fire-fighting liquid is sprayed be the shaped liquid film jet, and high velocity air and liquid film colliding, liquid film are torn and generated foam beads with the gas blending, become the foam hose stream that does not contain flowable aqueous water.
In conjunction with Fig. 1 and Fig. 2, realize the device of the above-mentioned method of foam that in high-speed gas jet, generates, water to be imported in the water pump 2 through conveyance conduit 3 by water tank 1, the import conveyance conduit 3 of water pump 2 also is connected with pump formula proportioner 4; Aqueous foam-forming solution or class A foam liquid from foam solution case 6 get in the import conveyance conduit 3 of water pump 2 through pump formula proportioner 4 and electromagnetic switch 5; Water after water pump 2 pressurizations or water and the mixed liquid of foam, 9 get in the liquid film nozzle 7 through the annular duct road, inject in the air-water energy exchange spray tube 8 with the shaped liquid film jet; With high velocity air bump from turbojet engine; Liquid film is torn, and generates the foam beads jet that does not contain flowable aqueous water with the gas blending, penetrates at a high speed.Wherein, the quantity of liquid film nozzle 7 can be 8~16, and the pressure that gets into the foam fire-fighting liquid of liquid film nozzle is 0.8~1.2MP, and flow is 60~100kg/s.The exit end face of liquid film nozzle 7 is fan-shaped; Covering of the fan extended corner β is 60~90 °; The gap in the exit of the injection channel that forms between the covering of the fan up and down is 2~3mm; The liquid film that liquid film nozzle 7 penetrates becomes 40~60 ° angle with the flow direction α that the air-flow in the tube 8 is sprayed in the air-water energy exchange, and liquid film nozzle 7 is 45~60 ° with the angle of air-water energy exchange spray tube 8 axis formation, like Fig. 3, Fig. 4 and Fig. 5.
Embodiment: combine Fig. 1 and Fig. 2, water is imported in the water pump 2 through conveyance conduit 3 by water tank 1, the import conveyance conduit 3 of water pump 2 also is connected with proportioner 4; Aqueous foam-forming solution or class A foam liquid from foam solution case 6 get in the import conveyance conduit 3 of water pump 2 through pump formula proportioner 4 and electromagnetic switch 5; The flow-rate ratio of mixing with water in the entering conveyance conduit 3 of its setting is set at 1%, 3%, 6% when using the MJPZ extinguishing chemical; Be set at 0.5%, 1%, 3% when using the class A foam extinguishing chemical, also can set as required.
Water after water pump 2 pressurizations or water and the mixed liquid of fire foam; 9 get in the liquid film nozzle 7 through the annular duct road; Inject in the air-water energy exchange spray tube 8 with the shaped liquid film jet, with the high velocity air bump from turbojet engine, liquid film is torn; Generate the foam beads jet that does not contain flowable aqueous water with the gas blending, penetrate at a high speed.When the discharge in getting into air-water energy exchange spray tube 8 was 60kg/s, the range of foam hose stream can reach 90~100m, and the instantaneous covering of foam scene of a fire area is 200m 2
Import fire foam in predefined ratio to water pump 2 imports by pumping formula foam proportioner 4 when electromagnetic switch 5 is opened, this moment, turbojet fire engine ejected " gas--foam hose stream "; When electromagnetic switch 5 was not opened, pumping formula foam proportioner 4 was not worked, and turbojet fire engine only ejects " air-water mist dual-phase jet ", was used to control the intensity of a fire, drives away toxic and harmful, reduced fire scene temperature, was beneficial to rescue.

Claims (1)

1. a device that in high-speed gas jet, generates foam is imported water in the water pump [2] through conveyance conduit [3] by water tank [1], and the import conveyance conduit [3] of water pump [2] also is connected with pump formula proportioner [4]; Aqueous foam-forming solution or class A foam liquid from foam solution case [6] get in the import conveyance conduit [3] of water pump [2] through pump formula proportioner [4] and electromagnetic switch [5]; It is characterized in that: the mixed liquid of water after water pump [2] pressurization or water and foam; Get in the liquid film nozzle [7] through annular duct road [9]; Inject in the air-water energy exchange spray tube [8] with the shaped liquid film jet, with the high velocity air bump from turbojet engine, liquid film is torn; Generate the foam beads jet that does not contain flowable aqueous water with the gas blending, penetrate at a high speed;
Wherein the exit end face of liquid film nozzle [7] is fan-shaped; The covering of the fan extended corner is 60 °~90 °; The gap in the exit of the injection channel that forms between the covering of the fan up and down is 2~3mm; The liquid film that penetrates from liquid film nozzle [7] becomes 40 °~60 ° angle with the flow direction that the air-flow the tube [8] is sprayed in the air-water energy exchange, and liquid film nozzle [7] is 45 °~60 ° with the angle of air-water energy exchange spray tube [8] axis formation.
CN 200910035880 2009-09-28 2009-09-28 Method and device for generating foam in high-speed gas jet Active CN102029030B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200910035880 CN102029030B (en) 2009-09-28 2009-09-28 Method and device for generating foam in high-speed gas jet

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Application Number Priority Date Filing Date Title
CN 200910035880 CN102029030B (en) 2009-09-28 2009-09-28 Method and device for generating foam in high-speed gas jet

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CN102029030A CN102029030A (en) 2011-04-27
CN102029030B true CN102029030B (en) 2012-12-12

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103007472B (en) * 2012-12-05 2015-08-19 中国人民解放军海军装备技术研究所 Compressed air foam extinguishing agent ejecting gun and method thereof
CN110987935A (en) * 2019-12-25 2020-04-10 中国科学院力学研究所 Optical system for dynamic test of surface of annular liquid film

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2208431Y (en) * 1994-10-21 1995-09-27 南京航空航天大学 Remote air-jetting type-extinguishing vehicle
CN2340456Y (en) * 1997-07-04 1999-09-29 中国人民解放军空军第一研究所 Multifunctional Vortex jetting fire engine
CN2455279Y (en) * 2000-12-30 2001-10-24 中国人民解放军第5704工厂 Vortex fire engine
CN101214409A (en) * 2008-01-04 2008-07-09 明光市浩淼消防科技发展有限公司 Fire-fighting vehicle-mounted vortex jetting fire extinguisher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2208431Y (en) * 1994-10-21 1995-09-27 南京航空航天大学 Remote air-jetting type-extinguishing vehicle
CN2340456Y (en) * 1997-07-04 1999-09-29 中国人民解放军空军第一研究所 Multifunctional Vortex jetting fire engine
CN2455279Y (en) * 2000-12-30 2001-10-24 中国人民解放军第5704工厂 Vortex fire engine
CN101214409A (en) * 2008-01-04 2008-07-09 明光市浩淼消防科技发展有限公司 Fire-fighting vehicle-mounted vortex jetting fire extinguisher

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