EP2186545A1 - Vorrichtung zur Schaumerzeugung für Feuerlösch-Strahlrohr - Google Patents

Vorrichtung zur Schaumerzeugung für Feuerlösch-Strahlrohr Download PDF

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Publication number
EP2186545A1
EP2186545A1 EP09290840A EP09290840A EP2186545A1 EP 2186545 A1 EP2186545 A1 EP 2186545A1 EP 09290840 A EP09290840 A EP 09290840A EP 09290840 A EP09290840 A EP 09290840A EP 2186545 A1 EP2186545 A1 EP 2186545A1
Authority
EP
European Patent Office
Prior art keywords
tube
premix
air
cylindrical tube
jets
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.)
Granted
Application number
EP09290840A
Other languages
English (en)
French (fr)
Other versions
EP2186545B1 (de
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 SA
Original Assignee
POK SA
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Filing date
Publication date
Application filed by POK SA filed Critical POK SA
Priority to PL09290840T priority Critical patent/PL2186545T3/pl
Publication of EP2186545A1 publication Critical patent/EP2186545A1/de
Application granted granted Critical
Publication of EP2186545B1 publication Critical patent/EP2186545B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
    • B01F25/3111—Devices specially adapted for generating foam, e.g. air foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31243—Eductor or eductor-type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31251—Throats
    • B01F25/312512—Profiled, grooved, ribbed throat, or being provided with baffles
    • 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
    • B05B7/0025—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 with a compressed gas supply
    • 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
    • B05B7/0025—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 with a compressed gas supply
    • B05B7/0031—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 with a compressed gas supply with disturbing means promoting mixing, e.g. balls, crowns

Definitions

  • the present invention relates to the field of fire lances type foam lances.
  • the present invention relates more particularly to a device for generating foam of a fire hose.
  • a problem in the field of foam lances concerns the insufficiency and inhomogeneity of the expansion of the water-emulsifier pre-mixture and the air before projection through the nozzle of the lance nozzle.
  • This device can be improved, as shown schematically figure 8 , by making an orifice in the center of the valve connected to the outside air by a pipe connected to the outside of the valve.
  • This solution allows the extraction of outside air at the center of the premix jet and increases the contact area between the premix and the air, thus doubling the expansion.
  • This solution has the disadvantage of having to provide an air supply pipe which is initially perpendicular to the axis of the jet and then rotates at 90 ° to bring the air to the center of the cone.
  • This embodiment is therefore complex expensive and only allows to bring air into contact with the inner surface of the premix jet.
  • the present invention aims to overcome some disadvantages of the prior art by providing a foam generation device of a fire hose.
  • the second cylindrical tube is held in the axis by radial spacers and maintained along the axis upstream of the first tube by a screw whose head just obstruct the nozzle of the corrugated divergent cone and whose Threaded rod passes in the middle of the radial spacers and penetrates into the inner threaded circumference of the splined divergent cone nozzle.
  • the second cylindrical tube is recessed coaxial in the second end of the spout by a socket embedded in the outer periphery of the second cylindrical tube.
  • a retaining ring is mounted coaxially and integrally around the second cylindrical tube downstream of the socket and upstream of the first tube of the nozzle and has an outer diameter slightly smaller than the inner diameter of the second end. lance nozzle to allow the maintenance of the second cylindrical tube, approximately in the axis, by abutment against the inner wall of the second end, without preventing the suction of the outside air.
  • the flutes of the diverging cone have an increasing section at the same time as the section of the cone.
  • the thickness of the partitions forming the separation of the grooves determines the air penetration spaces and the homogeneity of the foam.
  • the propagation front of the premix reaches the fire hose through a pipe.
  • This pipe has an inner diameter equal to the outer diameter of a second cylindrical tube (3) slightly protruding from the fire hose to allow the end of the hose to be fitted on the periphery of the second cylindrical tube (3) protruding.
  • the propagation front of the premix reaches the fire lance through a first end of the second cylindrical tube (3).
  • the front propagates in the second cylindrical tube (3) through radially fixed spacers (4) in the second cylindrical tube (3).
  • These spacers (4) define in their center a cylindrical zone of the same axis as the second cylindrical tube (3).
  • This zone cylindrical is of length and radius smaller than the length and the radius of the second cylindrical tube (3) respectively and the length and the radius of said cylindrical zone are adapted to pass the threaded rod, but not the head, of a screw (5).
  • the front propagates in the second cylindrical tube (3) not only through the radial spacers (4), but also around a screw (5) disposed in the axis of the second cylindrical tube (3), whose the head is in abutment against the central ends of the spacers (4) and whose threaded rod passes in the center of the radial spacers to reach the complementarily taped inner periphery of the nozzle (2b) of a splined divergent cone (2).
  • the radial spacers (4) and the screw (5) allow the grooved divergent cone (2) to remain in the axis within the second cylindrical tube (3); the central ends of the struts (4) being gripped, from upstream to downstream of the propagation front, between the head of the screw (5) and the nozzle (2b) of the corrugated divergent cone (2).
  • the propagation front of the premix always propagates in the second cylindrical tube (3) but also around the diverging fluted cone (2). Due to the divergence of the corrugated cone (2), the space available for the flow of the premix in the second cylindrical tube (3) decreases as the forehead propagates to the end of the second cylindrical tube ( 3) only the spaces delimited by the splines (2a) of the diverging cone (2).
  • the device of the present invention ensures not only the progressive speed of the premix, proportional to the ejection power of the premix, but also the creation of divergent jets separated from each other.
  • the propagation front consists of powerful jets, divergent and separated from each other.
  • premix jets are then projected onto the inner surface of a cylindrical or slightly convergent first tube (1a) located at a first end of a spear tip (1).
  • the spout (1) is furthermore constituted by a second end (1b) located upstream of the first tube (1a) and of dimensions adapted to allow a flush-fitting socket (6) to be embedded therein and approximately at mid-length of the outer periphery of the second cylindrical tube (3), so that the second cylindrical tube (3) is held in the center of the second end (1b) in the axis of the spout (1) and engaged in the second end (1b) by a suitably selected distance depending on the divergence of the jets leaving the second cylindrical tube (3); this divergence being closely related to the divergence of the fluted cone (2).
  • said distance between the outlet of the second cylindrical tube (3) and the inlet of the first tube (1a) of the spout (1) must be chosen to be large enough to allow outside air to flow from the sockets.
  • air (1ba) formed in the second end (1b) towards the inside of the first tube (1a) of the spout (1) but must be chosen sufficiently small so that the jets of premix leaving the second cylindrical tube (3) be projected on the inner surface of the first tube (1a) and not at the level of the air intakes (1 ba).
  • the powerful jets, diverging and separated from each other leaving the second cylindrical tube (3) and projected on the inner surface of the first tube (1a) allow not only the passage of the outside air on the outer surface of the jets by viscosity and the passage of the outside air between the separated jets, up to the inside of the first tube (1 a) of the spout (1), but also a first mixture between the air and the premix in the separation zones of the jets.
  • the suction effect of the outside air between the separated jets into the first tube (1a) is created by the divergence and separation of the jets.
  • said suction effect is accentuated by the joining of the jets meeting the inner surface of the first tube (1a) to create a closed premix volume upstream of the nozzle of the first tube (1a) of the spout (1), for example at the level of the axis (AA) represented on the Figures 2 and 4 .
  • the creation of a closed volume is all the easier as the splines of the diverging cone (2) have a section increasing at the same time as the section of the cone (2) and the thickness of the partitions (2c) forming the separation of splines determines the air penetration spaces and the homogeneity of the foam.
  • the device can be subjected to significant torsions at the level of the socket (6) which can cause excessive spacing of the second cylindrical tube (3) with respect to the axis of the spout (1) up to the disintegration or breaking of the recessed socket (6).
  • the present invention proposes to mount coaxially and integrally on the outer periphery of the second cylindrical tube (3) between the bushing to be inserted (6) located upstream and the first tube (1a) of the spear nozzle (1) located downstream , a retaining ring (7) having an outer diameter slightly smaller than the inside diameter of the second end (1b) of the spout (1) (cf. figure 3 ) to abut against the inner wall of the second end in the event of twisting so as to limit any deformation of the recessed socket (6). It is of course required that this retaining ring (7) must be of suitable dimensions to fulfill its office without preventing the suction of the outside air from the air intakes (1ba) made in the second end (1b). the spear (1).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP09290840A 2008-11-18 2009-11-05 Vorrichtung zur Schaumerzeugung für Feuerlösch-Strahlrohr Active EP2186545B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09290840T PL2186545T3 (pl) 2008-11-18 2009-11-05 Urządzenie do wytwarzania piany przeznaczone dla prądownicy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0806450A FR2938444B1 (fr) 2008-11-18 2008-11-18 Dispositif de generation de mousse d'une lance a incendie

Publications (2)

Publication Number Publication Date
EP2186545A1 true EP2186545A1 (de) 2010-05-19
EP2186545B1 EP2186545B1 (de) 2013-01-09

Family

ID=40765554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09290840A Active EP2186545B1 (de) 2008-11-18 2009-11-05 Vorrichtung zur Schaumerzeugung für Feuerlösch-Strahlrohr

Country Status (6)

Country Link
US (1) US20100122823A1 (de)
EP (1) EP2186545B1 (de)
CN (1) CN101732815B (de)
AU (1) AU2009238303B2 (de)
FR (1) FR2938444B1 (de)
PL (1) PL2186545T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2532391A1 (de) 2011-06-06 2012-12-12 Pok Vorrichtung zur Schaumerzeugung für Feuerlöschstrahlrohr
CN103585733A (zh) * 2012-08-18 2014-02-19 成都措普科技有限公司 消防车底盘自保装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151620A (zh) * 2011-03-24 2011-08-17 李新君 泡沫喷头
CN107670863A (zh) * 2017-11-14 2018-02-09 上海沥森环保科技有限公司 一种高压洗车机泡沫喷头及其应用
CN112972946A (zh) * 2021-03-04 2021-06-18 湖北江南专用特种汽车有限公司 一种压缩空气泡沫生成装置及其控制方法
CN115155350B (zh) * 2022-06-10 2024-02-23 中国石油化工股份有限公司 乙烯与氧气混合用的混合器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB488168A (en) * 1937-02-09 1938-07-01 Leon Wariginaire Improvements in or relating to foam-generating fire extinguishing appliances
DE934932C (de) * 1950-12-16 1955-11-10 Metz Carl Feuerloesch-Strahlrohr
US5330105A (en) * 1993-03-26 1994-07-19 Valkyrie Scientific Proprietary, L.C. Aspirating nozzle and accessory systems therefor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1779680A (en) * 1924-11-03 1930-10-28 Rayfield Mfg Company Oil burner
US2210476A (en) * 1939-01-30 1940-08-06 Peabody Engineering Corp Adjustable air register
US2513417A (en) * 1946-02-05 1950-07-04 American La France Foamite Airfoam nozzle
US2990885A (en) * 1958-08-28 1961-07-04 Akron Brass Mfg Co Inc Method and apparatus for producing fire extinguishing foam
US3236281A (en) * 1963-12-19 1966-02-22 United States Steel Corp Method and apparatus for burning a mixture of liquid and gaseous fuels
US5779158A (en) * 1996-04-16 1998-07-14 National Foam, Inc. Nozzle for use with fire-fighting foams
US7261248B2 (en) * 2004-08-09 2007-08-28 Curtis Harold D Spray nozzle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB488168A (en) * 1937-02-09 1938-07-01 Leon Wariginaire Improvements in or relating to foam-generating fire extinguishing appliances
DE934932C (de) * 1950-12-16 1955-11-10 Metz Carl Feuerloesch-Strahlrohr
US5330105A (en) * 1993-03-26 1994-07-19 Valkyrie Scientific Proprietary, L.C. Aspirating nozzle and accessory systems therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2532391A1 (de) 2011-06-06 2012-12-12 Pok Vorrichtung zur Schaumerzeugung für Feuerlöschstrahlrohr
CN103585733A (zh) * 2012-08-18 2014-02-19 成都措普科技有限公司 消防车底盘自保装置

Also Published As

Publication number Publication date
US20100122823A1 (en) 2010-05-20
AU2009238303B2 (en) 2014-04-03
FR2938444A1 (fr) 2010-05-21
PL2186545T3 (pl) 2013-06-28
CN101732815A (zh) 2010-06-16
CN101732815B (zh) 2013-08-28
EP2186545B1 (de) 2013-01-09
AU2009238303A1 (en) 2010-06-03
FR2938444B1 (fr) 2010-12-17

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