US3601199A - Process and device for producing extinguishing foam - Google Patents

Process and device for producing extinguishing foam Download PDF

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Publication number
US3601199A
US3601199A US3601199DA US3601199A US 3601199 A US3601199 A US 3601199A US 3601199D A US3601199D A US 3601199DA US 3601199 A US3601199 A US 3601199A
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United States
Prior art keywords
jet
foam
producing
expansion
air
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Expired - Lifetime
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English (en)
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Georges Rotvand
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Individual
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    • 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
    • B01F25/3123—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements
    • B01F25/31232—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements used simultaneously
    • 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
    • B01F25/31242—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 the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit

Definitions

  • the present invention concerns a process and device for producing a long-range jet of extinguishing foam, more particularly for extinguishing hydrocarbon fires. It is indeed known that the construction of large-capacity hydrocarbon tanks more than 20 meters high and of proportionately large diameter makes it necessary to use extinguishing devices producing long-range jets of foam should fire occur. It.
  • a less-well formed foam containing a relatively small proportion of air for a given proportion of liquid enables longer range jets to be obtained, but it is less stable, the emulsion of which it is formed breaking up more rapidly upon contact with the flaming liquid.
  • the object of the present invention is to obtain a long-range jet of foam having good extinguishing properties, and according to the invention there is provided a method of producing a jet of extinguishing from containing air, comprising producing a first jet of foam exhibiting more expansion above a more dense and more liquid second jet, the second jet forming a carrier vehicle for the first jet.
  • the two superimposed jets are not necessarily in direct contact with one another: the lower and more liquid jet may propel the upper and less dense jet indirectly by way of the layer of air which separates them, and which is itself propelled by the lower jet and propels the upper jet.
  • apparatus comprising at least a first foam tube operable to produce a first jet of a first degree of expansion and a second tube operable to produce a jet of a lower degree of expansion the jets being operable with the first tube above the second tube.
  • FIG. 1 is a view in longitudinal section of an appliance according to a first form of embodiment
  • FIG. 2 is a transverse section along Il-II in FIG. 1, and
  • FIG. 3 is a view in elevation of a second form of embodiment of the appliance.
  • an embodiment of apparatus comprises two pairs of foam tubes consisting of two juxtaposed upper tubes 1, 1 and two juxtaposed lower tubes 2, 2' disposed plumb with the first two respectively.
  • These four, tubes are fed with foaming liquid by a pipe 3 terminating in a divergent portion 4 equipped with a collar 5 to which four airaspirators 7, 7 8, 8' are bolted with the aid of the collar 6, the tubes 1, l, 2, 2' being linked to the said aspira'tors.
  • These airaspirators consist of cylindrical casings in the walls of which there are lateral air-aspirator orifices such as 9, 9', 9", 10, 10', 10'', and in which are fitted nozzles fed with foaming liquid via the pipe 3.
  • the nozzles of the upper tubes and of the lower tubes are of difierent shapes producing foam exhibiting different expansion.
  • the nozzles 11 of the lower tubes comprise a short convergent inlet 12 followed by a cylindrical passage 13 opening out into a cavitation chamber 14 of larger diameter than the inlet and outlet orifices.
  • nozzles 16 of the upper tubes which give rise to a more aerated foam, comprise a convergent passage 17 over almost their entire length, and terminate in a short cylindrical or slightly divergent passage 18 not extended by a cavitation chamber.
  • This appliance is capable of supplying four jets each having for example a delivery of 50 m. of foaming liquid per hour, the expansion being of the order of 6 to 7 for the upper tubes and 4 to 5 for the lower tubes.
  • the range of the resultant jet thus formed may be 10 percent greater than that of a jet consisting of a foam having a uniform expansion of 6 to 7.
  • FIG. 3 illustrates another form of embodiment of the ap piiance according to the invention wherein the upper tubes 1, 1' are longer than the lower tubes 2, 2', which enables a finer and lighter foam to be obtained in the tubes 1, 1' by virtue of a longer turbulent path in them.
  • both upper and lower tubes may be of identical construction, means being provided to feed to the upper and lower tubes respectively different foaming liquids producing different degrees of expansion.
  • the lower layer consists of a fluid foam spreading rapidly over the surface of the flaming liquid and surmounted by a more creamy layer which forms a thicker extinguishing cushion and collapses less rapidly, this layer effectively preventing the flames from being fed with combustion air.
  • a method of producing a jet of extinguishing foam containing air comprising producing a first foam jet exhibiting more expansion above a more dense and more liquid second foam jet, the second jet forming a carrier vehicle for the first jet.
  • a method of producing a jet of extinguishing foam containing air comprising producing a first foam jet exhibiting more expansion above a more dense and more liquid second foam jet, the second jet forming a carrier vehicle for the first jet, and wherein the first jet is propelled indirectly by the second jet by a layer of air which separates them.
  • Apparatus according to claim 5 wherein said two tubes comprise two identical'foam-forming tubes and two different sources of foaming liquids fed to said tubes respectively to produce different degrees of expansion.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Nozzles (AREA)
US3601199D 1968-05-03 1969-05-01 Process and device for producing extinguishing foam Expired - Lifetime US3601199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR150450 1968-05-03

Publications (1)

Publication Number Publication Date
US3601199A true US3601199A (en) 1971-08-24

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ID=8649770

Family Applications (1)

Application Number Title Priority Date Filing Date
US3601199D Expired - Lifetime US3601199A (en) 1968-05-03 1969-05-01 Process and device for producing extinguishing foam

Country Status (4)

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US (1) US3601199A (nl)
ES (1) ES366712A1 (nl)
FR (1) FR1578908A (nl)
GB (1) GB1212494A (nl)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780812A (en) * 1971-07-06 1973-12-25 M Lambert Method and apparatus for generating fire-fighting foam
WO2001087422A1 (fr) * 2000-05-15 2001-11-22 Sergei Gennadievich Kuprin Procede de formation d'un jet de mousse de moyen debit et a grande portee et dispositif de realisation de ce procede
US20120305272A1 (en) * 2011-06-06 2012-12-06 Pok S.A. Foam generating device for fire hoses
CN103331007A (zh) * 2013-07-04 2013-10-02 章丘市消防器材有限责任公司 中倍数消防泡沫炮
CN105013118A (zh) * 2015-07-27 2015-11-04 佛山高富中石油燃料沥青有限责任公司 一种改进的沥青生产用的消防装置
CN105107118A (zh) * 2015-09-11 2015-12-02 中国石油化工股份有限公司 远射程中倍数泡沫喷射器
US11440996B2 (en) 2017-12-27 2022-09-13 Zhejiang Nhu Co., Ltd. Preparation method of polyphenylene sulfide resin, and polyphenylene sulfide resin prepared thereby

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313952A1 (fr) * 1975-06-10 1977-01-07 Biro Fils Procede d'utilisation de mousses a bas et a moyen foisonnement pour l'extinction d'incendie de produits liquefies

Citations (3)

* 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
US3368760A (en) * 1963-06-05 1968-02-13 Charles C. Perry Method and apparatus for providing multiple liquid jets
US3384182A (en) * 1966-06-28 1968-05-21 Savas Method and apparatus for extinguishing fires utilizing a single aqueous solution of a salt and a foaming agent

Patent Citations (3)

* 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
US3368760A (en) * 1963-06-05 1968-02-13 Charles C. Perry Method and apparatus for providing multiple liquid jets
US3384182A (en) * 1966-06-28 1968-05-21 Savas Method and apparatus for extinguishing fires utilizing a single aqueous solution of a salt and a foaming agent

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780812A (en) * 1971-07-06 1973-12-25 M Lambert Method and apparatus for generating fire-fighting foam
WO2001087422A1 (fr) * 2000-05-15 2001-11-22 Sergei Gennadievich Kuprin Procede de formation d'un jet de mousse de moyen debit et a grande portee et dispositif de realisation de ce procede
US20120305272A1 (en) * 2011-06-06 2012-12-06 Pok S.A. Foam generating device for fire hoses
CN103331007A (zh) * 2013-07-04 2013-10-02 章丘市消防器材有限责任公司 中倍数消防泡沫炮
CN105013118A (zh) * 2015-07-27 2015-11-04 佛山高富中石油燃料沥青有限责任公司 一种改进的沥青生产用的消防装置
CN105107118A (zh) * 2015-09-11 2015-12-02 中国石油化工股份有限公司 远射程中倍数泡沫喷射器
US11440996B2 (en) 2017-12-27 2022-09-13 Zhejiang Nhu Co., Ltd. Preparation method of polyphenylene sulfide resin, and polyphenylene sulfide resin prepared thereby

Also Published As

Publication number Publication date
FR1578908A (nl) 1969-08-22
ES366712A1 (es) 1971-03-16
GB1212494A (en) 1970-11-18

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