WO1996009090A1 - Procedes et dispositifs d'emission de substances d'extinction du feu - Google Patents

Procedes et dispositifs d'emission de substances d'extinction du feu Download PDF

Info

Publication number
WO1996009090A1
WO1996009090A1 PCT/GB1995/002213 GB9502213W WO9609090A1 WO 1996009090 A1 WO1996009090 A1 WO 1996009090A1 GB 9502213 W GB9502213 W GB 9502213W WO 9609090 A1 WO9609090 A1 WO 9609090A1
Authority
WO
WIPO (PCT)
Prior art keywords
jets
nozzle
jet
outlets
directions
Prior art date
Application number
PCT/GB1995/002213
Other languages
English (en)
Inventor
Panos Papavergos
Original Assignee
Kidde Fire Protection Limited
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
Priority claimed from GB9419053A external-priority patent/GB2293762A/en
Application filed by Kidde Fire Protection Limited filed Critical Kidde Fire Protection Limited
Priority to AU35255/95A priority Critical patent/AU3525595A/en
Publication of WO1996009090A1 publication Critical patent/WO1996009090A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • 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
    • A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
    • A62C31/07—Nozzles specially adapted for fire-extinguishing with two or more outlets for different media

Definitions

  • the invention relates to methods of fire extinguishing
  • extinguishing comprising the steps of emitting at least two jets
  • spray nozzle for fire extinguishing purposes, comprising a body
  • portion formed with at least two outlets for producing respective
  • jets being a jet of liquid extinguishant which is atomised by the
  • a spray nozzle for fire extinguishing purposes comprising a body portion formed with a plurality of first outlets for respectively
  • the second outlets being positioned to direct the second jets in
  • each pair of intersecting jets being a jet of liquid
  • the second outlets being spaced from the first outlets in said first direction.
  • Figure 1 is a diagrammatic cross-section through one spray nozzle embodying the invention
  • Figure 2 is a cross-section through another spray nozzle
  • Figure 3 is a cross-section through part of a further spray
  • the water spray nozzle shown in Figure 1 comprises (in this
  • the end 8 is closed off by a wall defining
  • a frusto-conically shaped portion 12 integral with and surrounded
  • the frusto-conically shaped wall portion 12 defines five (in this
  • the radial .end wall portion 14 also defines five (in this example)
  • outlets 18 are equally spaced through outlets 18 and, again, two are shown.
  • the nozzle includes an insert part 20.
  • the insert has a further cylindrical wall 28 having an
  • a radial shoulder 32 integral with and extending annularly around the wall 22 incorporates through bores 34; two of these are shown
  • the shoulder 32 supports an outer cylindrical wall 36 defining
  • the insert 20 is securely mounted within the cylindrical body 5
  • the insert incorporates an O-ring 48 which seals against the
  • Each outlet 16 lies in the same radial plane (with respect to the
  • the nozzle is attached, by means of the internal thread 54, to a water supply pipe through which water is supplied at a pressure within the range 5 - 20 bar g and possibly up to 40 bar g.
  • the water passes into the central chamber 50 through the through bore 26 and into the annular chamber 52 through the bores 34. Thence, the water exits in jets through the outlets 16 and 18.
  • the water supply to all the outlets .16,18 comes from a common source.
  • the outlets 16 are inclined with respect to the outlets 18, and the outlets 16 and 18 are aligned with each other (all on same radius from axis) , the water jets from the outlets 16 impinge on those from the outlets 18, this impingement taking place close to the end wall 8 of the nozzle.
  • the emerging water jets impinge on one another, some or most of their kinetic energy is transferred to produce mutual shearing of the water, thus transforming the water jets into a rarified spray of fine drops.
  • the drops having acquired sufficient momentum from the remaining kinetic energy of the emerging jets, form a directional spray, the throw of which is determined by the spray angle and water throughput. Air is entrained from the ambient atmosphere into the spray and this inhibits coalescence of the drops downstream of the nozzle.
  • the spray of fine water drops thus produced is found to provide very effective fire extinguishment with the use of little water (as compared with deluge or sprinkler systems) .
  • the characteristics of the water spray are affected by the relative angles of the impinging water jets and the positions at
  • the average drop size may be between 80 and 300 micrometres with 99% of the drops measured on a volume basis
  • the water spray being less than 1000 micrometres.
  • outlets 16,18 are preferably about 1.0mm or less and desirably
  • the removable inner body 20 is advantageous from a manufacturing
  • body 20 is removable, clearance of blockages and the like, and
  • the inner body can include
  • Figure 2 shows another form of nozzle. Again, this is in two parts .
  • the outer body comprises a cylindrical wall 60 having an end wall 62 with a frusto-conical integral portion 64 similar to the
  • frusto-conically shaped wall portion 64 defines five (in this
  • radial end wall portion 66 also defines five (in this example) equally spaced through outlets 18 and, again, two are shown.
  • outlets 16 and 18 are arranged in the same way as the outlets 16
  • the inner body 68 of the nozzle of Figure 2 is of simpler
  • the inner body 68 included an O-ring 71
  • the inner and outer bodies 68 and 60 define a central chamber 74 in communication with the outlets 16 and an annular chamber 76 in communication with the outlets 18.
  • Chamber 74 is connected to a connection port 78.
  • Chamber 76 is connected to a connection port 80 which is formed
  • Port 78 is internally threaded at 84 to enable it to be connected
  • Port 80 is internally threaded at 86 to
  • a suitable gas such as air or nitrogen
  • exiting water jets are angled to the exiting air jets and aligned
  • the water drop size produced is of the same order as for the nozzle of Figu i 1, or less. Again, the
  • the applied water pressure may lie
  • pressure may be 4 bar g or less, again producing a consistent
  • the removable inner body 68 enables easier manufacture and
  • inner body may again include a filter (not shown) to reduce
  • Figure 3 shows part of a modified form of the nozzle of Figure
  • Figure 3 shows only the body 5 of the nozzle.
  • outlets 18 in Figure 1 differ from the outlets 18 in Figure 1 in that the outlets 18 in
  • outlets 16 are perpendicular to the axis through
  • the frusto-conically shaped portion 12 is shaped
  • the nozzle of Figure 3 is provided with a groove 52 which retains
  • the cap is blown off when the nozzle is
  • the water supply to the nozzles of Figures 1,2 and 3 can be from
  • Any suitable control system may be
  • any other suitable liquid extinguishant can be any other suitable liquid extinguishant.
  • flammable gas can be used.
  • each nozzle has a generally flat end in which are
  • nozzles In practice, a plurality of the nozzles would be used, rather than a single nozzle.
  • the nozzles would be arranged in an assembly so as to act together to produce an effective total water spray.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

Buse (5) de pulvérisation d'eau conçue pour l'extinction du feu, possédant un premier groupe d'orifices de sortie (18) qui sont dirigés axialement et émettent dans l'atmosphère ambiante des jets d'eau dirigés axialement, ainsi qu'un second groupe d'orifices de sortie (16) qui sont inclinés par rapport à l'axe de la buse et émettent des jets d'eau qui viennent heurter les jets d'eau dirigés axialement. Tous les orifices de sortie d'eau sont raccordés à une alimentation commune en eau sous pression. Les jets d'eau dirigés contre les jets axiaux provoquent l'atomisation de l'eau qui est pulvérisée en fines gouttelettes. Dans un autre mode de réalisation, l'un des groupes d'orifices de sortie peut être alimenté par un gaz comprimé tel que de l'air, au lieu d'être alimenté par de l'eau.
PCT/GB1995/002213 1994-09-20 1995-09-19 Procedes et dispositifs d'emission de substances d'extinction du feu WO1996009090A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35255/95A AU3525595A (en) 1994-09-20 1995-09-19 Fire extinguishant discharge methods and apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9419053.5 1994-09-20
GB9419053A GB2293762A (en) 1994-09-20 1994-09-20 Extinguishing fires
GB9509601.2 1995-05-11
GB9509601A GB2293322A (en) 1994-09-20 1995-05-11 Extinguishing fires

Publications (1)

Publication Number Publication Date
WO1996009090A1 true WO1996009090A1 (fr) 1996-03-28

Family

ID=26305664

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002213 WO1996009090A1 (fr) 1994-09-20 1995-09-19 Procedes et dispositifs d'emission de substances d'extinction du feu

Country Status (2)

Country Link
AU (1) AU3525595A (fr)
WO (1) WO1996009090A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8313717B2 (en) 2005-05-20 2012-11-20 Grundfos Nonox A/S Atomization of fluids by mutual impingement of fluid streams
CN103028217A (zh) * 2011-09-29 2013-04-10 上海磊诺工业气体有限公司 嵌装式气体喷嘴
JP2021085389A (ja) * 2019-11-29 2021-06-03 株式会社日立産機システム 給液式スクリュー圧縮機

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506434A (fr) *
US2252698A (en) * 1939-10-20 1941-08-19 Leslie M Button Universal nozzle
US2323464A (en) * 1942-05-21 1943-07-06 Akron Brass Mfg Company Inc Spray nozzle
DE880097C (de) * 1951-01-16 1953-06-18 Kloeckner Humboldt Deutz Ag Duese, insbesondere fuer die Brandloeschung
EP0388033A2 (fr) * 1989-03-14 1990-09-19 The British Petroleum Company P.L.C. Buse de pulvérisation anti-incendie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506434A (fr) *
US2252698A (en) * 1939-10-20 1941-08-19 Leslie M Button Universal nozzle
US2323464A (en) * 1942-05-21 1943-07-06 Akron Brass Mfg Company Inc Spray nozzle
DE880097C (de) * 1951-01-16 1953-06-18 Kloeckner Humboldt Deutz Ag Duese, insbesondere fuer die Brandloeschung
EP0388033A2 (fr) * 1989-03-14 1990-09-19 The British Petroleum Company P.L.C. Buse de pulvérisation anti-incendie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8313717B2 (en) 2005-05-20 2012-11-20 Grundfos Nonox A/S Atomization of fluids by mutual impingement of fluid streams
CN103028217A (zh) * 2011-09-29 2013-04-10 上海磊诺工业气体有限公司 嵌装式气体喷嘴
JP2021085389A (ja) * 2019-11-29 2021-06-03 株式会社日立産機システム 給液式スクリュー圧縮機

Also Published As

Publication number Publication date
AU3525595A (en) 1996-04-09

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