EP0719590B1 - Dispositif de projection d'un mélange d'air et de liquide - Google Patents

Dispositif de projection d'un mélange d'air et de liquide Download PDF

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Publication number
EP0719590B1
EP0719590B1 EP95402955A EP95402955A EP0719590B1 EP 0719590 B1 EP0719590 B1 EP 0719590B1 EP 95402955 A EP95402955 A EP 95402955A EP 95402955 A EP95402955 A EP 95402955A EP 0719590 B1 EP0719590 B1 EP 0719590B1
Authority
EP
European Patent Office
Prior art keywords
air
liquid
mixture
constituted
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.)
Expired - Lifetime
Application number
EP95402955A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0719590A1 (fr
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/fr
Application granted granted Critical
Publication of EP0719590B1 publication Critical patent/EP0719590B1/fr
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 projection of a mixture of air and liquid intended for protect installations against thermal radiation of materials in combustion near them, or to fight against the fires of said installations.
  • liquid under pressure which can be either water or a mixture of water and an emulsifier.
  • the projection device at the same time generates foam.
  • the foam thus produced or the feed water must be projected largely from homogeneous mining under shape of a flat shape jet to have a good efficiency.
  • the invention finds its application in industrial facilities for the production or storage of flammable products and more generally in buildings and facilities that present a risk of fire.
  • French patent 2,220,985 describes a device foam and water coolant, with a calibrated orifice liquid inlet, axial air inlet, body hollow forming a diverging convergent assembly followed by a hollow cylinder at the end of which a deflector is mounted and an outlet for the liquid air mixture. In the vicinity of the narrowest part of the diverging converging assembly a divider is mounted in the axis of the liquid stream 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 work with its axis directed vertically to protect surfaces horizontal.
  • the distance from the projection devices compared to the walls to be protected makes them difficult accessible for maintenance.
  • 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 emulsifying products used nor the quality of the foam to be obtained.
  • French patent 2,291,798 describes a basis for spraying of a frothy fluid, consisting of a cylindrical axial bore, onto which drilled holes in the radial direction, as well as an orifice output, consisting of deep adial milling which leads to the front end of the axial drilling of this nozzle, and having parallel limiting walls forming an angle of about 80 ° with the axial hole. Of plus the rear limiting surface is up to par from the center line of the axial bore.
  • This type of nozzle is well suited for spraying of a frothy fluid that is to say the production of a cloud fine droplets, but does not produce a jet of foam of water suitable for fire fighting.
  • water and water mixtures and emulsifier used in industrial plants for firefighting often contain suspended particles. These come in particular from the oxidation of the pipes which constitute the networks of distribution and storage of these liquids.
  • the object of the present invention is precisely to remedy these drawbacks and in particular to provide a very effective fire fighting and protection against thermal radiation of materials combustion nearby, by spraying with foam or water.
  • This device is particularly suitable for projection of 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 spraying a mixture of air and liquid having a hollow cylindrical body forming a chamber expansion device provided with means of connection to a source of liquid under pressure, from a calibrated orifice placed towards its upstream end, a deflector closing its end downstream, from an air inlet in communication with the room expansion, and a radial outlet of the mixture of air and slit-like liquid with parallel limiting walls adjacent to the deflector, characterized in that said deflector is flat and arranged perpendicular to the axis of the cylindrical body and said parallel boundary walls of the outlet are perpendicular to the axis of the cylindrical body.
  • connection means, the calibrated orifice, the body and the deflector constitute a monobloc assembly, produced according to the mechanic welding technique.
  • the calibrated orifice is constituted by a removable washer placed between the upstream end of the body and the means of connection.
  • the air inlet is constituted by at least one opening lateral in the body wall.
  • the body is provided with means for adjusting the incoming air flow in the expansion chamber.
  • the means for regulating the air flow entering the room expansion consist of a rotating ring and sliding around the body to the right of the entrance air, provided with at least one lateral orifice and means for locking in position relative to the body.
  • the radial outlet of the mixture of air and liquid is constituted by a slit cut in the wall of the body and of which the angular opening is greater than 180 °.
  • the device comprises at least one rigid wire which enters through the radial outlet and crosses the body and the calibrated orifice.
  • the device of the invention is used to spray 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 assembly monobloc produced economically using the mechanic technique welding, shown in Figure 1.
  • the air and liquid projection device is connected to a source of pressurized liquid by means 3 connection, for example a threaded end.
  • Liquid is water when you want to protect a equipment of a nearby fire, by cooling it.
  • the liquid is a mixture of water and a product emulsifier when you want to protect equipment by foam projection.
  • Pressurized liquid passes through port 4 calibrated which determines its flow for a given pressure.
  • the jet of liquid which forms at the outlet of orifice 4 calibrated, crosses the expansion chamber 2 where it mixes to the air which is sucked by suction through the inlet 8 side, then hits the flat deflector 6 arranged perpendicular to the axis of the cylindrical body.
  • a mixture is formed in the expansion chamber 2 air and water when the pressurized liquid is water and foam when the pressurized liquid is a mixture of water and an emulsifier.
  • the mixture of air and liquid hits the deflector 6 flat and leaves the body 1 through the radial outlet 9. It thus produces a jet of air and liquid, or foam, homogeneous, flat, the plane of this jet being perpendicular to the axis of the body 1 of the device projection.
  • 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 means 3 of connection.
  • the device is provided with means 11 for adjusting the flow rate of air entering the expansion chamber 2 to obtain a desired quality foam.
  • the means of adjusting the air flow entering the expansion chamber shown in Figure 4 are constituted by a rotating and sliding ring 12 placed around the body 1 to the right of the air inlet 8, provided with at least one lateral orifice 13 and blocking means 14 in position relative to the body.
  • a ring 12 comprising several lateral holes 13 of diameters different smaller than the diameter of the inlet 8 of air.
  • the air flow is adjusted by setting look of the air inlet 8, a hole 13 of the ring 12, of larger or smaller diameter depending on air flow desired, which allows to obtain 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 for the mixture of air and liquid as shown in detail in Figure 5 is constituted by a slot 15 cut in the wall of the body 1, the angular opening 16 of which is greater than 180 °. This opening is chosen according to the shape more or less open of the flat jet to be obtained.
  • a final characteristic of the device of the invention is a rigid wire introduced into the radial outlet 9 of the body 1 and which passes through said body and the calibrated orifice 4.
  • This rigid wire vibrates under the effect of the flow of liquid and mixing. air and liquid in which it is placed.
  • the resulting displacements in the orifice 4 calibrated have the effect of releasing said orifice and in particular to prevent its obstruction by particles of rust that may be suspended in the liquid feed.
  • This rigid wire is an effective means of automatic cleaning of the elements of the air and liquid projector object of the invention valid for all other embodiments.
  • devices according to the invention were mounted on a cylindrical tank with vertical axis used for the storage of liquid hydrocarbons.

Landscapes

  • Nozzles (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP95402955A 1994-12-29 1995-12-28 Dispositif de projection d'un mélange d'air et de liquide Expired - Lifetime EP0719590B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=9470427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402955A Expired - Lifetime EP0719590B1 (fr) 1994-12-29 1995-12-28 Dispositif de projection d'un mélange d'air et de liquide

Country Status (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9614979D0 (en) * 1996-07-17 1996-09-04 Newteam Ltd Aerating arrangement primarily for a shower head
GB9721297D0 (en) 1997-10-07 1997-12-10 Lurmark Ltd Spray nozzle

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL36427C (enrdf_load_stackoverflow) * 1932-12-02
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
DE2454725A1 (de) * 1974-11-19 1976-05-26 Lechler Apparatebau Kg Duese zum verspruehen eines schaumfoermigen mediums, insbesondere von pflanzenschutzmitteln
FR2303605A1 (fr) * 1975-03-12 1976-10-08 Rotvand Georges Generateur de mousse
US3961754A (en) * 1975-09-12 1976-06-08 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
US5275763A (en) * 1992-10-26 1994-01-04 Toshiharu Fukai Nozzle for generating bubbles
DE9308745U1 (de) * 1993-06-11 1993-08-12 Aerosol Technik Lindal Gmbh, 23843 Bad Oldesloe Spenderkopf für ein Schaumaerosol

Also Published As

Publication number Publication date
DE69504290T2 (de) 1999-04-01
FR2728808B1 (enrdf_load_stackoverflow) 1997-02-21
DE69504290D1 (de) 1998-10-01
FR2728808A1 (fr) 1996-07-05
EP0719590A1 (fr) 1996-07-03

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