EP2532391A1 - Dispositif de generation de mousse d`une lance a incendie - Google Patents

Dispositif de generation de mousse d`une lance a incendie Download PDF

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Publication number
EP2532391A1
EP2532391A1 EP12167988A EP12167988A EP2532391A1 EP 2532391 A1 EP2532391 A1 EP 2532391A1 EP 12167988 A EP12167988 A EP 12167988A EP 12167988 A EP12167988 A EP 12167988A EP 2532391 A1 EP2532391 A1 EP 2532391A1
Authority
EP
European Patent Office
Prior art keywords
water
jets
emulsifier
generating device
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12167988A
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German (de)
English (en)
French (fr)
Inventor
Bruno Grandpierre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
POK
Original Assignee
POK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by POK filed Critical POK
Publication of EP2532391A1 publication Critical patent/EP2532391A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/002—Apparatus for mixing extinguishants with water
    • 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
    • A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids

Definitions

  • the present invention relates to the field of fire hoses.
  • foam generation devices are designed so as to avoid the insufficiency and inhomogeneity of the expansion of the water-emulsifier pre-mixture with the air during the formation of the foam projected through the nozzle of the spear nozzle, the expansion corresponding to the ratio between the volume of foam produced on the volume of foaming solution used.
  • the insufficiency and inhomogeneity of the expansion can limit the effectiveness of the foam to smother the fire and the range of the foam jet.
  • This foam generating device has a spearhead formed of a cylindrical or slightly convergent downstream tube having a first end in which air intakes are made and a second end through which the foam leaves, a cylindrical upstream tube disposed co -axially inside the downstream tube in the first end of the nozzle and a diverging cone arranged co-axially inside the cylindrical upstream tube.
  • the diverging cone is provided with grooves, the propagation front of an initial premix of water and emulsifier propagating in the cylindrical upstream tube around the splined divergent cone to create at the outlet of this upstream tube of the melt jets.
  • -mixture water-emulsifier divergent and separated from the initial premix formed by the water and the emulsifier.
  • the separation of the water-emulsifier pre-mixing jets makes it possible to create an external air flow suction effect towards the inside of the downstream tube of the lance nozzle and a mixture between the sucked air flows and the jet of air jets. water-emulsifier premix in the jet separation zones.
  • the foam generating device described in the European patent application EP 2,186,545 allows to create a final mixture of foams in jets having abundance values and in satisfactory quantity.
  • Such additional equipment is known today, such as, for example, electronic devices for injecting an emulsifier into water.
  • the present invention aims to overcome this main disadvantage of the prior art and proposes a device for generating foam of a fire hose, comprising a socket intended to be attached to a water supply pipe, a lance nozzle formed of a first end in which air intakes are made and a second end of the foam projection and an intermediate ring fixed between the sleeve and the first end of the spear and to create several separate streams of water flowing through it.
  • the foam generating device is remarkable in that the intermediate body is arranged to receive an emulsifying fluid and to pre-mix it with the water jets by suction and contact of the emulsifying fluid with the water jets, then to project the jets of premix water-emulsifier and to mix them with the air flows in the nozzle of lance.
  • the intermediate body makes it possible to avoid having to use additional equipment for premixing the water and the foam concentrate and to obtain a foam having the required qualities for the fight against fires. .
  • the intermediate body has an intermediate body having an injection chamber separate water jets and suction of the emulsifier in the water jets, the water jets being distributed in a ring upstream of the inputs of air.
  • the foam generation device makes it possible to advantageously combine the advantages of the self-suction of the emulsifier at the chamber and the mixing quality of the convergent jets of the water-emulsifier premix with the air flow by suction of air flows into the spear.
  • the injection and suction chamber has a volume delimited by: a substantially cylindrical axial wall having an opening for receiving a means for feeding the emulsifier, a first radial wall having first openings for communicating with the socket, and a second radial wall having second openings for communicating with the nozzle, each second opening being opposite a first opening, the first openings and the second openings being distributed along a ring in the radial walls.
  • the first radial wall of the intermediate body has a diverging cone projecting to divide the flow of water, the first openings being distributed in a ring at the periphery and around the diverging cone in the first radial wall.
  • the intermediate body has a first substantially cylindrical end axial wall for attaching it to the socket and a second substantially cylindrical end axial wall for securing it to the spout.
  • the intermediate body has several means for guiding and accelerating the water jets housed in the first openings and opening into the injection and suction chamber, these guiding and accelerating means allowing their exit into the injection and suction chamber the entrainment of the emulsifier in the jets of water, by suction and contact of the emulsifier with the water jets.
  • the injection and suction chamber makes it possible to create a vacuum that achieves the self-suction of the water. emulsifier in the water jets.
  • the guiding and accelerating means are first tubes having a convergent cross-section portion allowing the flow of the water jets to be accelerated so as to suck up the foam concentrate. their output.
  • the first tubes are injectors which have a convergent frustoconical cross-section portion followed by a right cross section.
  • the intermediate body has several means for guiding and premixing the emulsifier in the water jets, these guiding and pre-mixing means being housed in the second openings and opening into the injection chamber and suction.
  • the guiding and pre-mixing means are second tubes whose passage section allows premixing of the emulsifier with each jet of water received by a tube.
  • the second tubes have a right cross section.
  • the second tubes have a length greater than the length of the first end of the nozzle and allowing the water-emulsifier premix jets to exit downstream of the air inlets, once the tubes housed in the second openings .
  • FIG. 1 to 9 discloses a foam generation device (1) of a fire lamp having an intermediate body (2) which, in accordance with the invention, enables entrainment of an emulsifying fluid in separate jets of water and mixing of airflow with each of the water-emulsifier premix jets to produce a fire-fighting foam.
  • the term 'axial' used later in the description qualifies any element extending parallel to the longitudinal axis of the foam generating device (1), the term 'radial' any element extending perpendicularly to the longitudinal axis. of the foam generating device (1) and the terms 'upstream' and 'downstream' refer to the orientation of the fluid flow which is made in an axial direction from left to right on the Figures 1, 2,3 , 5, 6 and 9 .
  • the intermediate body (2) of substantially cylindrical shape is located between a downstream end of a bushing (3) and the first upstream end of a spear tip (4).
  • the sleeve (3) is an inlet nozzle and is fixed by its upstream end to a water supply pipe by screwing.
  • the spearhead (4) is known and is advantageously that described in the European patent EP 2 168 545 .
  • the body (4) has at its first upstream end (4a) air intakes (4b) and at its second downstream end (4c) a convergent frustoconical wall against which the water-emulsifier premix jets and the flow streams mix together to form the fire-fighting foam.
  • the intermediate body (2) according to the invention is arranged in such a way as to create separate water jets which pass through it axially and to pre-mix the emulsifying fluid with the water jets separated by suction and contact of the emulsifying fluid with the jets of water, the foam fluid being distributed around each jet of water.
  • the water-emulsifier premix jets are mixed with the air flows in the lance nozzle (4), the air flows enveloping the water-emulsifier premix jets over their entire periphery. at their exit from the intermediate body (2) in the spout (4), which allows to produce a foam with an expansion value having remarkable properties.
  • the intermediate body (2) has an injection and suction chamber (5) having a volume arranged to allow the injection of water jets separated into a ring and the suction of the emulsifier in the jets of water.
  • means for guiding and accelerating (6) the flow of water jets communicate with the chamber (5).
  • the means for guiding and accelerating (6) the water jets have passages of the water jets having an axial shrinkage of their cross section to achieve at their exit the suction of the emulsifier in the water jets by venturi effect due to the acceleration of the jets of water.
  • the guiding and accelerating means (6) are so-called “first tubes (60)" which open at an upstream end into the bushing (3) and at a downstream end into the chamber (5). ) injection and aspiration.
  • injectors or "eductors” which have a first portion of convergent cross section whose entry opens into the sleeve (3), this first part being followed by a second section section transverse right whose exit opens into the chamber (5) of injection and suction.
  • first openings (8) or "upstream openings" of the intermediate body (2) are arranged in first openings (8) or "upstream openings" of the intermediate body (2), these first openings (8) being arranged in a ring, which is illustrated in particular on the figure 7 .
  • the first openings (8) are regularly spaced on the ring.
  • the guiding and premixing means (7) have passages of the water-emulsifier jets having a length for mixing the emulsifier with the water jets and to keep the water-emulsifier jets separated from each other.
  • these guiding and pre-mixing means are tubes (7) called “second tubes (61)" or channels opening through an upstream end into the chamber (5) of injection and suction and by a downstream end in the nozzle (4).
  • the second tubes (61) are arranged in second openings (9) or "downstream openings" of the intermediate body (2), these second openings (9) being arranged in a ring opposite or facing each other. screws of the first openings (8), as illustrated on the Figures 5, 6 , 8 and 9 .
  • the second openings (9) are evenly spaced on the ring.
  • the second tubes (61) have a length such that once mounted in the second openings (9), their downstream end is located at or downstream of the air inlets (4b) of the spout (4).
  • tubes (61) with a cross section but they could have any type of section for the passage channel of the water-emulsifier jets, for example a diverging frustoconical section.
  • the first tubes (60) and the second tubes (61) are arranged facing each other in the pre-mixing chamber (5) because of the positioning opposite the first openings (8) and the second openings (9).
  • a distance is provided between the downstream ends of the first tubes (60) and the upstream ends of the second tubes (61) opening into the injection and suction chamber (5) to enable the jets of water to be discharged from the first tubes. (60) in the chamber (5) and the inlet in the second tubes (61) of water jets sucking and contacting the emulsifier.
  • the intermediate body (2) has an upstream portion oriented in the foam generating device (1) to the sleeve (3) and for making the jets of water, a central portion for sucking and injecting a quantity of the emulsifying fluid in each water jet, and a downstream part oriented in the foam generation device (1) towards the lance nozzle (4) and making it possible to mix the sucked-up emulsifying fluid with the spray jets. water.
  • the upstream part comprises a substantially cylindrical axial longitudinal wall (10) inserted and fixed inside the sleeve (3), a first radial wall (11) upstream, having the first openings (8) located on its periphery and around a projecting element (12) having substantially the shape of a diverging cone.
  • This projecting element (12) is centered on the first radial wall (11). It divides the flow of water in the sleeve (3), while limiting the turbulence in these jets of water, the water is then again divided into water jets in the first tubes (60).
  • the central part is formed by a hollow body forming the injection and suction chamber (5) between the water jets and the emulsifying fluid, the hollow body being connected and communicating on the one hand axially with the sleeve (3). ) and with the nozzle (4) and on the other hand radially with means for supplying the emulsifying fluid equipped with an opening valve.
  • the hollow body is formed on the one hand by a substantially cylindrical axial central longitudinal wall (13) having a radial opening (14) on which the means of supplying the emulsifier is connected, and on the other hand, by the first upstream radial wall (11) and a second downstream radial wall (15), these walls (11, 15) being parallel and substantially circular and extending perpendicularly to the axial longitudinal wall (13) so as to form the volume of the injection and suction chamber (5).
  • the downstream portion of the intermediate body (2) comprises the second downstream radial wall (15) and a substantially cylindrical axial longitudinal wall (16) inserted and fixed inside the first upstream end of the spout (4).
  • the second radial wall (15) has the second openings (9) which are located opposite the first openings (8), these second openings (9) being traversed each by the second tubes (61) downstream premix of the water and foam concentrate.
  • first openings (8) and second openings (9) are not fixed and depends on the dimensions of the first radial wall (11) and the second radial wall (15).
  • O-rings (17) guarantee the tightness of the device and are arranged between a shoulder of the first tubes (60) and the outer face of the first upstream radial wall (11) and a shoulder of the second tubes (61) and the outer face the second downstream radial wall (15).
  • the spout (4) has on its outer axial wall lugs (18) for fixing plates to project the foam in a particular form of nozzle outlet spearhead (4), as shown on the figure 5 .
  • the intermediate injection and suction chamber (5) is filled with an emulsifier and the quantity of emulsifier is sucked by each second downstream tube (61). allows a pre-mixing of jets water-emulsifier substantially homogeneous in each second downstream tube (61).
  • the foam generation device makes it possible to obtain, while using the self-suction of the emulsifier (that is to say without having to use additional equipment to make the water-emulsifier mixture) of the foams having in particular low expansion by the suction of the air flow at the first upstream end of the spearbolts (4) around the jets of water-emulsifier separated in a ring.
  • the expansion values may be between 10 and 28 depending on the emulsifier used.
  • the foam generation device according to the invention makes it possible to obtain increased ranges of 10 to 20% compared with known devices.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
EP12167988A 2011-06-06 2012-05-15 Dispositif de generation de mousse d`une lance a incendie Withdrawn EP2532391A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1154886A FR2975917B1 (fr) 2011-06-06 2011-06-06 Dispositif de generation de mousse d'une lance a incendie

Publications (1)

Publication Number Publication Date
EP2532391A1 true EP2532391A1 (fr) 2012-12-12

Family

ID=46046030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12167988A Withdrawn EP2532391A1 (fr) 2011-06-06 2012-05-15 Dispositif de generation de mousse d`une lance a incendie

Country Status (7)

Country Link
US (1) US20120305272A1 (pt)
EP (1) EP2532391A1 (pt)
CN (1) CN102836508A (pt)
AU (1) AU2012202832A1 (pt)
BR (1) BR102012011547A2 (pt)
FR (1) FR2975917B1 (pt)
RU (1) RU2012119994A (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021204306A1 (en) * 2020-04-10 2021-10-14 Jetex Innovation S.R.O. Fire extinguishing equipment with fire nozzle
CZ309237B6 (cs) * 2020-04-10 2022-06-08 Jetex Innovation S.R.O. Hasicí zařízení s požární proudnicí

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102439593B1 (ko) 2013-10-02 2022-09-02 에어로코어 테크놀로지스 엘엘씨 제트 엔진용 세정 방법
US11643946B2 (en) 2013-10-02 2023-05-09 Aerocore Technologies Llc Cleaning method for jet engine
US10315206B2 (en) 2016-08-04 2019-06-11 Brian Cvetezar Spray gun
US10919058B2 (en) 2016-08-04 2021-02-16 Brian Cvetezar Spray gun
CN106390343A (zh) * 2016-10-19 2017-02-15 江苏津泰机电有限公司 吸气式细水雾泡沫两用喷头
US11376638B2 (en) 2019-03-27 2022-07-05 Michael Nugent Directionally adjustable foam generating attachment for a hose

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577451A (en) * 1949-02-24 1951-12-04 Standard Oil Dev Co Apparatus for the production of air foam and air foam fire-extinguishing installations
US2609240A (en) * 1949-12-13 1952-09-02 Pyrene Mfg Co Controlled discharge foam nozzle
US5445226A (en) * 1993-05-04 1995-08-29 Scott Plastics Ltd. Foam generating apparatus for attachment to hose delivering pressurized liquid
DE102008025325A1 (de) * 2008-05-27 2009-04-16 VOGT AG Feuerwehrgeräte- und Fahrzeugbau Strahlpumpenverdichter zum Erzeugen von Druckluftschaum CAFS-(Compressed Air Foam System)
EP2168545A1 (en) 2008-09-24 2010-03-31 Atom Medical Corporation Incubator with canopy obstruction sensor
EP2186545A1 (fr) 2008-11-18 2010-05-19 Pok S.A. Dispositif de génération de mousse d'une lance à incendie

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1782366A (en) * 1925-10-07 1930-11-18 Amdyco Corp Method of and apparatus for producing fire-extinguishing foam
US2057218A (en) * 1934-08-30 1936-10-13 Pyrene Minimax Corp Method and apparatus for producting fire extinguishing foam
US2556239A (en) * 1947-04-01 1951-06-12 Richard L Tuve Foam fire fighting method
GB806920A (en) * 1955-09-19 1959-01-07 Pyrene Co Ltd Improvements relating to foam generators
US2990885A (en) * 1958-08-28 1961-07-04 Akron Brass Mfg Co Inc Method and apparatus for producing fire extinguishing foam
FR1578908A (pt) * 1968-05-03 1969-08-22
FR2619023B1 (fr) * 1987-08-07 1991-04-12 Lamort E & M Injecteur melangeur sous pression
FR2623730A1 (fr) * 1987-11-27 1989-06-02 Dion Biro Guy Installation de fabrication de mousses, notamment pour la realisation d'elements de construction cellulaires permettant la fabrication de mousses avec de tres faibles proportions d'agent emulsifiant comprises entre 1 et 15 pour mille
EP0608140A3 (en) * 1993-01-22 1995-12-13 Cca Inc Mechanical foam fire fighting equipment and method.
CN2334435Y (zh) * 1998-07-22 1999-08-25 张建军 一种消防枪
CN2577898Y (zh) * 2002-11-25 2003-10-08 刘欣传 空气泡沫枪
CN201783418U (zh) * 2010-07-08 2011-04-06 何邦正 多功能泡沫洗车喷枪

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577451A (en) * 1949-02-24 1951-12-04 Standard Oil Dev Co Apparatus for the production of air foam and air foam fire-extinguishing installations
US2609240A (en) * 1949-12-13 1952-09-02 Pyrene Mfg Co Controlled discharge foam nozzle
US5445226A (en) * 1993-05-04 1995-08-29 Scott Plastics Ltd. Foam generating apparatus for attachment to hose delivering pressurized liquid
DE102008025325A1 (de) * 2008-05-27 2009-04-16 VOGT AG Feuerwehrgeräte- und Fahrzeugbau Strahlpumpenverdichter zum Erzeugen von Druckluftschaum CAFS-(Compressed Air Foam System)
EP2168545A1 (en) 2008-09-24 2010-03-31 Atom Medical Corporation Incubator with canopy obstruction sensor
EP2186545A1 (fr) 2008-11-18 2010-05-19 Pok S.A. Dispositif de génération de mousse d'une lance à incendie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021204306A1 (en) * 2020-04-10 2021-10-14 Jetex Innovation S.R.O. Fire extinguishing equipment with fire nozzle
CZ309237B6 (cs) * 2020-04-10 2022-06-08 Jetex Innovation S.R.O. Hasicí zařízení s požární proudnicí

Also Published As

Publication number Publication date
AU2012202832A1 (en) 2012-12-20
US20120305272A1 (en) 2012-12-06
FR2975917B1 (fr) 2014-02-14
FR2975917A1 (fr) 2012-12-07
CN102836508A (zh) 2012-12-26
BR102012011547A2 (pt) 2013-06-25
RU2012119994A (ru) 2013-11-20

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