EP0719590A1 - Vorrichtung zum Versprühen von einem Flüssigkeit-Luft-Gemisch - Google Patents

Vorrichtung zum Versprühen von einem Flüssigkeit-Luft-Gemisch Download PDF

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Publication number
EP0719590A1
EP0719590A1 EP95402955A EP95402955A EP0719590A1 EP 0719590 A1 EP0719590 A1 EP 0719590A1 EP 95402955 A EP95402955 A EP 95402955A EP 95402955 A EP95402955 A EP 95402955A EP 0719590 A1 EP0719590 A1 EP 0719590A1
Authority
EP
European Patent Office
Prior art keywords
liquid
air
mixture
deflector
expansion chamber
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
EP95402955A
Other languages
English (en)
French (fr)
Other versions
EP0719590B1 (de
Inventor
Jacques Chenu
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.)
Elf Antar France
Original Assignee
Elf Antar France
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 Elf Antar France filed Critical Elf Antar France
Publication of EP0719590A1 publication Critical patent/EP0719590A1/de
Application granted granted Critical
Publication of EP0719590B1 publication Critical patent/EP0719590B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/522—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings
    • 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
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid

Definitions

  • the present invention relates to a device for spraying a mixture of air and liquid intended to protect installations against the thermal radiation of materials in combustion in their vicinity, or to fight against fires of said installations.
  • a pressurized liquid which can either be water or a mixture of water and emulsifying product.
  • the projection device simultaneously generates foam.
  • the foam thus produced or the feed water must be sprayed largely from homogeneous mining in the form of a jet of flat shape to have good efficiency.
  • the invention finds its application in industrial installations for the production or storage of flammable products and more generally in buildings and installations which present a fire risk.
  • French patent 2,220,985 describes a device for sprinkling by foam and water, comprising a calibrated orifice for the arrival of liquid, an axial air inlet, a hollow body forming a diverging convergent assembly followed by a hollow cylinder at l 'end of which is mounted a deflector and an outlet of the liquid air mixture. In the vicinity of the narrowest part of the diverging converging assembly is mounted a divider in the axis of the flow of liquid leaving the calibrated orifice.
  • the jet of water or foam obtained with this device has the shape of a hollow cone.
  • This device is well suited to operate with its axis directed vertically to protect horizontal surfaces.
  • the air inlet and its position relative to the liquid stream, as well as the diameter of the calibrated orifice are fixed, and therefore cannot be adapted to the quality of the emulsifiers used or to the quality of the foam to be obtained.
  • French Patent 2,291,798 describes a base for spraying a frothy fluid, consisting of a cylindrical axial bore, onto which open holes arranged in the axial direction, as well as an outlet orifice, constituted by a deep adial milling which opens on the front end of the axial bore of this nozzle, and having parallel limiting walls forming an angle of approximately 80 ° with axial drilling.
  • the rear limitation surface abuts at the height of the center line of the axial bore.
  • This type of nozzle is well suited for spraying a frothy fluid, that is to say producing a cloud of fine droplets, but does not produce a jet of water foam suitable for fighting fires.
  • water and water and emulsifier mixtures used in industrial firefighting facilities often contain suspended particles. These come in particular from the oxidation of the pipes which constitute the distribution and storage networks for these liquids.
  • the object of the present invention is precisely to remedy these drawbacks and in particular to provide a very effective device for fighting fire and protecting against thermal radiation from materials in combustion nearby, by spraying foam or water.
  • This device is particularly suitable for spraying foam or water on vertical walls.
  • the device of the invention is much less expensive than known devices and easier to maintain.
  • the present invention provides a device for projecting a mixture of air and liquid comprising a hollow cylindrical body forming an expansion chamber provided with means for connection to a source of pressurized liquid, an orifice calibrated placed towards its upstream end, a deflector closing its downstream end, an air inlet in communication with the expansion chamber, and a radial outlet of the mixture of air and liquid in the form of a slot with parallel limiting walls adjacent to the deflector, said deflector being flat and arranged perpendicular to the axis of the cylindrical body.
  • connection means, the calibrated orifice, the body and the deflector constitute a one-piece assembly, produced according to the technique of mechanical welding.
  • the calibrated orifice is constituted by a removable washer placed between the upstream end of the body and the connection means.
  • the air inlet consists of at least one lateral opening in the wall of the body.
  • the body is provided with means for adjusting the air flow entering the expansion chamber.
  • the means for adjusting the air flow entering the expansion chamber are constituted by a rotating ring and sliding placed around the body to the right of the air inlet, provided with at least one lateral orifice and locking means in position relative to the body.
  • the upstream end of the body is cut at a bevel and constitutes the air inlet into the expansion chamber, the calibrated orifice being located upstream of the connection means on the source of liquid.
  • the radial outlet of the mixture of air and liquid consists of a slot cut in the wall of the body and whose angular opening is greater than 180 °.
  • the device comprises at least one rigid wire which enters through the radial outlet and passes through the body and the calibrated orifice.
  • the device of the invention is used to project a mixture of air and liquid in order to protect equipment against fires.
  • connection means 3, the calibrated orifice 4, the body 1 and the deflector 6 constitute the one-piece assembly produced economically according to the mechanized welding technique, shown in FIG. 1.
  • the air and liquid projection device is connected to a source of pressurized liquid by the connection means 3, for example a threaded end piece.
  • Liquid is water when you want to protect equipment from a nearby fire by cooling it.
  • the liquid is a mixture of water and an emulsifier when you want to protect equipment by spraying foam.
  • the pressurized liquid passes through the calibrated orifice 4 which determines its flow for a given pressure.
  • the liquid jet which forms at the outlet of the calibrated orifice 4 crosses the expansion chamber 2 where it mixes with the air which is sucked in by suction through the side inlet 8, then strikes the deflector 6 flat arranged perpendicular to the axis of the cylindrical body.
  • a mixture of air and water is formed in the expansion chamber 2 when the pressurized liquid is water and foam when the pressurized liquid is a mixture of water and an emulsifying product. .
  • the mixture of air and liquid strikes the flat deflector 6 and leaves the body 1 via the radial outlet 9. There is thus produced a jet of air and liquid, or foam, homogeneous, of flat shape, the plane of this jet being perpendicular to the axis of the body 1 of the projection device.
  • FIG. 2 Another embodiment of the invention is shown in Figure 2 in which the calibrated orifice 4 is constituted by a removable washer 10 placed between the upstream end 5 of the body and the connection means 3.
  • the device is provided with means 11 for adjusting the air flow entering the expansion chamber 2 to obtain a foam of desired quality.
  • the means for adjusting the air flow entering the expansion chamber represented in FIG. 4 are constituted by a rotating and sliding ring 12 placed around the body 1 in line with the air inlet 8, provided with at least one orifice 13 lateral and locking means 14 in position relative to the body.
  • a ring 12 comprising several lateral holes 13 of different diameters smaller than the diameter of the air inlet orifice 8.
  • the air flow is adjusted by placing a hole 13 in the ring 12, of more or less diameter, opposite the air inlet 8, as a function of the desired air flow, which allows '' get different qualities of foam.
  • the ring 12 is locked in position relative to the body 1, by means of a needle screw 14.
  • the radial outlet 9 of the mixture of air and liquid as shown in detail in FIG. 5, consists of a slot 15 cut from the wall of the body 1, the angular opening 16 of which is greater than 180 °. This opening is chosen according to the more or less open shape of the flat jet to be obtained.
  • the c rps 1 is cut in a bevel 17 at its upstream end, the calibrated ori ice 4 being located directly on the means 19 for supplying liquid.
  • the air enters through the opening resulting from the bevel cut 17 from the upstream end of the body 1.
  • the cut angle of the bevel is adjusted to obtain the desired quality of foam, from a mixture of and a given emulsifier product, a given calibrated orifice diameter, and a given pressure of the liquid in the supply line of said liquid.
  • a last feature shown in Figure 6 is a rigid wire 18 introduced into the radial outlet 9 of the body 1 and which passes through said body and 1 orifice 4 calibrated.
  • This rigid wire 18 vibrates under the effect of the flows of liquid and of mixture of air and liquid in which it is placed.
  • the resulting movements in the calibrated orifice 4 have the effect of releasing said orifice and in particular preventing its obstruction by rust particles which may be in suspension in the feed liquid.
  • This rigid wire 18 constitutes an effective means of automatic cleaning of the elements of the air and liquid spray device object of the invention. Its use is not limited to the embodiment shown in FIG. 6, it is also valid for all the other embodiments.
  • devices according to the invention were mounted on a cylindrical tank with a vertical axis used for the storage of liquid hydrocarbons.

Landscapes

  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Nozzles (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP95402955A 1994-12-29 1995-12-28 Vorrichtung zum Versprühen von einem Flüssigkeit-Luft-Gemisch Expired - Lifetime EP0719590B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9415887A FR2728808A1 (fr) 1994-12-29 1994-12-29 Dispositif de projection d'un melange d'air et de liquide
FR9415887 1994-12-29

Publications (2)

Publication Number Publication Date
EP0719590A1 true EP0719590A1 (de) 1996-07-03
EP0719590B1 EP0719590B1 (de) 1998-08-26

Family

ID=9470427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402955A Expired - Lifetime EP0719590B1 (de) 1994-12-29 1995-12-28 Vorrichtung zum Versprühen von einem Flüssigkeit-Luft-Gemisch

Country Status (3)

Country Link
EP (1) EP0719590B1 (de)
DE (1) DE69504290T2 (de)
FR (1) FR2728808A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002250A1 (en) * 1996-07-17 1998-01-22 Newteam Limited Aerating arrangement primarily for a shower head
WO1999017886A1 (en) * 1997-10-07 1999-04-15 Lurmark Limited Spray nozzle

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763601A (fr) * 1932-12-02 1934-05-03 Procédé de projection de peinture sous basse pression
FR980879A (fr) * 1948-12-24 1951-05-18 Tuyère de pulvérisation à jet horizontal
FR1002584A (fr) * 1946-10-29 1952-03-07 Walther & Cie Ag Pulvérisateur en nappe
FR1101871A (fr) * 1954-04-08 1955-10-11 Robinetterie S A J Soc D Perfectionnement aux appareils à jet, tels que pulvérisateurs et atomiseurs
GB776783A (en) * 1954-01-18 1957-06-12 Edward Haftke Improvements in foam generators
US3066870A (en) * 1959-10-05 1962-12-04 Edwin E Hanson Spray nozzle
FR2291798A1 (fr) * 1974-11-19 1976-06-18 Lechler Apparatebau Kg Buse pour la vaporisation d'un fluide mousseux notamment de produits pour la protection des vegetaux
FR2303605A1 (fr) * 1975-03-12 1976-10-08 Rotvand Georges Generateur de mousse
US4058262A (en) * 1976-02-13 1977-11-15 Bete Fog Nozzle Inc. Fluid spray for generating rectangular coverage
US4071195A (en) * 1975-09-12 1978-01-31 Economics Laboratory, Inc. Spray and foam producing nozzle apparatus
US5054688A (en) * 1989-12-20 1991-10-08 Robwen, Inc. Foam producing nozzle
US5234167A (en) * 1989-11-16 1993-08-10 Afa Products, Inc. One-piece foamer nozzle
DE9308745U1 (de) * 1993-06-11 1993-08-12 Aerosol Technik Lindal Gmbh, 23843 Bad Oldesloe, De
EP0596155A1 (de) * 1992-10-26 1994-05-11 Toshiharu Fukai Düse zur Erzeugung von Blasen

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763601A (fr) * 1932-12-02 1934-05-03 Procédé de projection de peinture sous basse pression
FR1002584A (fr) * 1946-10-29 1952-03-07 Walther & Cie Ag Pulvérisateur en nappe
FR980879A (fr) * 1948-12-24 1951-05-18 Tuyère de pulvérisation à jet horizontal
GB776783A (en) * 1954-01-18 1957-06-12 Edward Haftke Improvements in foam generators
FR1101871A (fr) * 1954-04-08 1955-10-11 Robinetterie S A J Soc D Perfectionnement aux appareils à jet, tels que pulvérisateurs et atomiseurs
US3066870A (en) * 1959-10-05 1962-12-04 Edwin E Hanson Spray nozzle
FR2291798A1 (fr) * 1974-11-19 1976-06-18 Lechler Apparatebau Kg Buse pour la vaporisation d'un fluide mousseux notamment de produits pour la protection des vegetaux
FR2303605A1 (fr) * 1975-03-12 1976-10-08 Rotvand Georges Generateur de mousse
US4071195A (en) * 1975-09-12 1978-01-31 Economics Laboratory, Inc. Spray and foam producing nozzle apparatus
US4058262A (en) * 1976-02-13 1977-11-15 Bete Fog Nozzle Inc. Fluid spray for generating rectangular coverage
US5234167A (en) * 1989-11-16 1993-08-10 Afa Products, Inc. One-piece foamer nozzle
US5054688A (en) * 1989-12-20 1991-10-08 Robwen, Inc. Foam producing nozzle
EP0596155A1 (de) * 1992-10-26 1994-05-11 Toshiharu Fukai Düse zur Erzeugung von Blasen
DE9308745U1 (de) * 1993-06-11 1993-08-12 Aerosol Technik Lindal Gmbh, 23843 Bad Oldesloe, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002250A1 (en) * 1996-07-17 1998-01-22 Newteam Limited Aerating arrangement primarily for a shower head
WO1999017886A1 (en) * 1997-10-07 1999-04-15 Lurmark Limited Spray nozzle
GB2345011A (en) * 1997-10-07 2000-06-28 Lurmark Ltd Spray nozzle
GB2345011B (en) * 1997-10-07 2001-08-08 Lurmark Ltd Spray nozzle
US6338444B1 (en) 1997-10-07 2002-01-15 Lurmark Limited Spray nozzle

Also Published As

Publication number Publication date
FR2728808A1 (fr) 1996-07-05
DE69504290D1 (de) 1998-10-01
EP0719590B1 (de) 1998-08-26
DE69504290T2 (de) 1999-04-01
FR2728808B1 (de) 1997-02-21

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