US2043599A - Device for producing foam - Google Patents
Device for producing foam Download PDFInfo
- Publication number
- US2043599A US2043599A US707808A US70780834A US2043599A US 2043599 A US2043599 A US 2043599A US 707808 A US707808 A US 707808A US 70780834 A US70780834 A US 70780834A US 2043599 A US2043599 A US 2043599A
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- US
- United States
- Prior art keywords
- foam
- gas
- pipe
- receptacle
- injector
- 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
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/002—Apparatus for mixing extinguishants with water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/26—Foam
Definitions
- This invention relates to a device for creating and conducting foam -in a mechanical manner.
- condensed gas or liquefied gas for instance, carbon dioinde
- a lar element placed within a liquid, which may be the foam-forming liquid itself, for complete evaporation or pre-heating.
- Condensed or liquefied gases have a very high pressure. Therefore the mixture and conducting of the foam-forming substances towards the place of fire can bearranged-in pipes under high pressure, resulting, from a point of ecnonomy, in the very great advantage of permitting piping of rather small diameter to be used, because the gas and liquid mixture at the existent high pressure remains in its characteristic liquefied condition and consequently has a correspondingly low'frictional coeflicient.
- a certain release of the pressure of the gas and liquid mixture takes place, and thus the formation of the foam is effected, for instance,by a widening of the piping at or near its end.
- a is a pressure-proof steel-bottle, provided with a discharge pipe b.
- the branch-pipe 0 leads tangentially into a cylindrical receptacle d, serving as duction of the pipe 0 into this receptacle has the purpose of throwing by centrifugal force against the wall of the receptacle any snow which might form, in order to eiiect an evaporation thereof at this point.
- a pipe-coil might be also used or in order to insure a complete evaporation of the liquefied gas; the latter may be allowed to-enter from below into a receptacle partly filled with water.
- the exit-pipe e of the vaporizer leads to the injector I which has at its rear end a flange g for the .connecion of a water-pipe.
- the water may vaporizer or pre-heater.
- the tangential intro may be drawn inby the injector.
- the injector is provided with a flange h for connecting the foam piping.
- the latter may contain, as above mentioned, a distributing element at the'beginning or at the end, or at both points.
- a concentrated foam-forming solution which is mixed within the injectorchamber l with the water entering the same, aches the injector througha pipe i coming fro the receptacle k.
- a container for a highly compressed gas a vaporizing receptacle connected with said container for vaporizing the compressed gas, a container for a foam-forming solution, an injector-like .mixing chamber for said gas under pressure and said solution, a conduit for the vaporized gas extending between said vaporizing. receptacle and said mixing chamber, said conduit ending within acaaaoe 2.
- a container for a highly compressed gas a vaporizing receptacle connected with said container for vaporizing the compressed gas, a container for a foam- -forming solution, a mixing chamber 5 for said gas under pressure and-said solution, a conduit for the vaporized gas extending between said vapo rizlng receptacle and said mixing chamher, a connection from theup'per part of said container to said conduit, a reducing valve in'10 said connection, a'connection from the lower part tainer for a foam-forming ingredient, an injector device for mixing said gas and foam-form ingre- 20 1 trans, a conduit for said gas extending into the forward end of said injector device near the exhaust end thereof, an inlet for water in the rear part of said injector device, a supply pipe extending from saidcontainer for the foam-forming in- 25 gredient and opening into said injector device between said gas and water inlets, and a pipe leading from the exhaust end of
Description
June 9, 1936.
E. WALDSCHMIDT I 2,043,599
DEVICE FOR PRODUCING FOAM Filed Jan. 22, 1934 Inone device of this kind, air with a certain,
Patented June 9, 1936 PATENT oFF-lcn I 2.04am
nrzvron ron rnonucnva roan Erich Wald achmidt, Berlln-Charlottenlmrg, Germany, alsignor, by mane assignments, to Pyrene-Mlnimax Corporation, a corporation of Delaware Application January 22. 1934. sci-m No. 707,808
' In Germany Janna-r120. 1933 4 Claims. (oi. zency This invention relates to a device for creating and conducting foam -in a mechanical manner.
- amount of pressure in very fine streams, is led into a liquid capable of forming foam. In another the gas and the foam-forming liquid are introduced into a device in which an intensive turbulent mixture of these substances takes place creating the foam. This procees requires the use with another material produces-a suction effect by of power.
of machinery and a considerable consumption In another process the material which is mixed which the latter is sucked in.- This process operates at acomparatively low pressure, so that the production of the foam begins in the mixing chamber or just beyond it. Therefore the conducting conduit for the foam mixture must have a large cross-section in view of the high-frictional coefficient of the foam, which in the case of long conduits, greatly influences the cost of the apparatus and the installation.
In" accordance with another process, pumps are used which suck in the air and the foam-forming fluid and mix them in a mixing apparatus. In this case also, machines having a high power consumption are necessary. Furthermore since the formation of the foam takes place in the mixing apparatus the conducting conduits associated therewith also require large cross-sections.
In applying the present invention, condensed gas or liquefied gas, for instance, carbon dioinde,
is used, stored in the well known steelbottles as a source of gas and energy. Even when requiring the production of very considerable quantities of foam, only a few such bottles with condensed or liquefied gas are necessary.
To extinguish, for instance, the confiagaration of an oil-tanksof about 30 m. diameter about 100,000 liters of foam would be required. To adhere to the cited example of the carbon dioxide, the required quantity of gas would be only 6 botles, each of a capacity. of 30 kilos contents. An
lar element, placed within a liquid, which may be the foam-forming liquid itself, for complete evaporation or pre-heating.
Condensed or liquefied gases have a very high pressure. Therefore the mixture and conducting of the foam-forming substances towards the place of fire can bearranged-in pipes under high pressure, resulting, from a point of ecnonomy, in the very great advantage of permitting piping of rather small diameter to be used, because the gas and liquid mixture at the existent high pressure remains in its characteristic liquefied condition and consequently has a correspondingly low'frictional coeflicient. Previous to the flowing of the foam to the place of fire a certain release of the pressure of the gas and liquid mixture takes place, and thus the formation of the foam is effected, for instance,by a widening of the piping at or near its end. It is of particular advantage when using carbonic acid that this gas is absorbed strongly by water when under high pressure, thus resulting in a considerable reduction of volume. For the foam-formation, or its improvement, it is already known to employ suitably porous bodies, such as, for instance, cylindrical receptacles with insets of fibrous fabrics, wire-screens, Raschigrings or the like, which'may be arranged at the beginning of the foam-conduitat the injectoras well as at the other end, at the place of consumption, or both, at the beginning and at the end. a
The accompanying drawing represents a diagrammatic view, partly in section, one form of device in accordance with the invention.
a is a pressure-proof steel-bottle, provided with a discharge pipe b. The branch-pipe 0 leads tangentially into a cylindrical receptacle d, serving as duction of the pipe 0 into this receptacle has the purpose of throwing by centrifugal force against the wall of the receptacle any snow which might form, in order to eiiect an evaporation thereof at this point. From the bottom of this receptacle it leads a pipe e, the entrance-opening of which is situated at some distance from the bottom of the receptacle, in order to prevent any clogging up of the pipe by carbon dioxide snow which may have formed here. In place of the receptacle d a pipe-coil might be also used or in order to insure a complete evaporation of the liquefied gas; the latter may be allowed to-enter from below into a receptacle partly filled with water.
The exit-pipe e of the vaporizer leads to the injector I which has at its rear end a flange g for the .connecion of a water-pipe. The water may vaporizer or pre-heater. The tangential intromay be drawn inby the injector. At the discharge end, the injector is provided with a flange h for connecting the foam piping. The latter may contain, as above mentioned, a distributing element at the'beginning or at the end, or at both points. A concentrated foam-forming solution, which is mixed within the injectorchamber l with the water entering the same, aches the injector througha pipe i coming fro the receptacle k. A pipe m branches of! from the pipe e and this pipe m leads to the top-part of there:
ceptacle lcfor the foam-forming solution. This conduit is provided with a reduction-valve a, preventing an excess of pressure within the receptacle It. All the pressures prevailing in the receptacles (land It, as ,well as in the injectorchamber 1 and at the injector-exit, can be indicated at special gauges M NF, M and M Having thus described my said invention, what I claim to be protected by Letters Patent is:
1. In an-apparatus' of the class described, a container for a highly compressed gas, a vaporizing receptacle connected with said container for vaporizing the compressed gas, a container for a foam-forming solution, an injector-like .mixing chamber for said gas under pressure and said solution, a conduit for the vaporized gas extending between said vaporizing. receptacle and said mixing chamber, said conduit ending within acaaaoe 2. In anapparatus of the class described, a container for a highly compressed gas, a vaporizing receptacle connected with said container for vaporizing the compressed gas, a container for a foam- -forming solution, a mixing chamber 5 for said gas under pressure and-said solution, a conduit for the vaporized gas extending between said vapo rizlng receptacle and said mixing chamher, a connection from theup'per part of said container to said conduit, a reducing valve in'10 said connection, a'connection from the lower part tainer for a foam-forming ingredient, an injector device for mixing said gas and foam-form ingre- 20 1 dient, a conduit for said gas extending into the forward end of said injector device near the exhaust end thereof, an inlet for water in the rear part of said injector device, a supply pipe extending from saidcontainer for the foam-forming in- 25 gredient and opening into said injector device between said gas and water inlets, and a pipe leading from the exhaust end of said injector device adapted to convey the mixture therefrom for expansion at suitable points and the production 30 of foam thereat.
- 4. The combination claimed in claim 3 wherein theconduit for the gas extends into the forward end of said injector device and directs the gas through the exhaust end thereof. 35
ERICK WALDSCHMIDT.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2043599X | 1933-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2043599A true US2043599A (en) | 1936-06-09 |
Family
ID=7982321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US707808A Expired - Lifetime US2043599A (en) | 1933-01-20 | 1934-01-22 | Device for producing foam |
Country Status (1)
Country | Link |
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US (1) | US2043599A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2418858A (en) * | 1943-03-18 | 1947-04-15 | Urquhart Radcliffe Morris | Apparatus for making cellular masses |
US2645292A (en) * | 1951-04-16 | 1953-07-14 | Gen Aniline & Film Corp | Apparatus for extinguishing fires |
US2861787A (en) * | 1956-06-20 | 1958-11-25 | Iowa State College Res Found | Apparatus for mixing finely-divided solids with liquids |
US2864714A (en) * | 1954-02-09 | 1958-12-16 | Nat Foam System Inc | Method of producing aerated cementitious material |
US2917395A (en) * | 1957-06-24 | 1959-12-15 | Iowa State College Res Found | Method for combining a bituminous binder with an aggregate material |
US3107519A (en) * | 1960-04-28 | 1963-10-22 | Drew Chem Corp | Defoaming tester |
US3231134A (en) * | 1961-09-01 | 1966-01-25 | Lorant Joseph John | Spraying liquids |
US5086846A (en) * | 1989-11-29 | 1992-02-11 | Carlson Richard F | Foam-dispensing apparatus |
-
1934
- 1934-01-22 US US707808A patent/US2043599A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2418858A (en) * | 1943-03-18 | 1947-04-15 | Urquhart Radcliffe Morris | Apparatus for making cellular masses |
US2645292A (en) * | 1951-04-16 | 1953-07-14 | Gen Aniline & Film Corp | Apparatus for extinguishing fires |
US2864714A (en) * | 1954-02-09 | 1958-12-16 | Nat Foam System Inc | Method of producing aerated cementitious material |
US2861787A (en) * | 1956-06-20 | 1958-11-25 | Iowa State College Res Found | Apparatus for mixing finely-divided solids with liquids |
US2917395A (en) * | 1957-06-24 | 1959-12-15 | Iowa State College Res Found | Method for combining a bituminous binder with an aggregate material |
US3107519A (en) * | 1960-04-28 | 1963-10-22 | Drew Chem Corp | Defoaming tester |
US3231134A (en) * | 1961-09-01 | 1966-01-25 | Lorant Joseph John | Spraying liquids |
US5086846A (en) * | 1989-11-29 | 1992-02-11 | Carlson Richard F | Foam-dispensing apparatus |
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