DE838249C - Air foam generation pipe for fire extinguishing purposes - Google Patents

Air foam generation pipe for fire extinguishing purposes

Info

Publication number
DE838249C
DE838249C DEM319A DE838249DA DE838249C DE 838249 C DE838249 C DE 838249C DE M319 A DEM319 A DE M319A DE 838249D A DE838249D A DE 838249DA DE 838249 C DE838249 C DE 838249C
Authority
DE
Germany
Prior art keywords
foam
star
conical
air foam
guide surface
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
Application number
DEM319A
Other languages
German (de)
Inventor
Johannes Feulner
Dipl-Ing Johannes Schoen
Georg Schuette
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.)
MINIMAX VERTRIEBS GmbH
Original Assignee
MINIMAX VERTRIEBS GmbH
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 MINIMAX VERTRIEBS GmbH filed Critical MINIMAX VERTRIEBS GmbH
Application granted granted Critical
Publication of DE838249C publication Critical patent/DE838249C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30Injector mixers
    • B01F25/31Injector mixers in conduits or tubes through which the main component flows
    • B01F25/311Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
    • B01F25/3111Devices specially adapted for generating foam, e.g. air foam
    • B01F25/31112Devices specially adapted for generating foam, e.g. air foam with additional mixing means other than injector mixers, e.g. screen or baffles
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/005Delivery of fire-extinguishing material using nozzles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • 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)

Description

Luftschaumerzeugungsrohr für Feuerlösdizwecke Die Erfindung betrifft ein Luftschaumerzeugungsrohr für Feuerlöschzwecke, das hinter dem Fangrohr ein sich in der Strömungsrichtung erweiterndes kegelförmiges Sieb enthält. Bei den bekannten Luftschaumerzeugungsrohren dieser Art, insbesondere bei denjenigen für größere Leistungen, wird durch das in dem Schaumrohr enthaltene kegelförmige Sieb, das an sich zur Verbesserung des Schaumes dient, eine gewisse Turbulenz erzeugt, die sich derart auswirkt, daß der aus der Schaumaustrittsdüse austretende Strahl eine gewisse unerwünschte Auflockerung zeigt. Ziel der Erfindung ist, hier Abhilfe zu schaffen.Air foam generation pipe for fire release purposes The invention relates to an air foam generation pipe for fire extinguishing purposes, which is located behind the catch pipe Contains conical sieve widening in the direction of flow. With the known Air foam generation pipes of this type, especially those for larger capacities, is through the conical sieve contained in the foam tube, which in itself improves of the foam is used, a certain turbulence is generated, which has such an effect that the jet emerging from the foam outlet nozzle a certain undesirable loosening up shows. The aim of the invention is to remedy this.

Zu diesem Zweck ist gemäß der Erfindung bei dem Luftschaumerzeugungsrohr innerhalb des Siehes ein Leitflächenstern angeordnet. Durch diesen Lcit'flichenskr'i wird der durch das Kegelsieb hindurchtretende Schaum in verschiedenen Teilströmungen geführt und hierdurch beruhigt und zu einer geradlinigen Strömung gezwungen. Um eine möglichst vollkommene Wirkung zu erzielen, ist es zweckmäßig, die äußere Form des Leitflächensterns derjenigen des Siebes anzupassen. Der Leitflächenstern liegt hierzu vorteilhaft mit seinen Längsrändern an der Innenwandung des Siebes an. Um die Führung des Schaumes bis nahe an den Schaumaustritt beizubehalten, weist der Leitflächenstern zweckmäßig einen Ansatz auf, mit dem er in die Schaumaustrittsdüse hineinragt. Bei Luftschaumerzeugungsrohren, die sich von ihrem größten Querschnitt, an dem das Kegelsieb endet, nach der Austrittsdüse hin wieder verjüngen, ist der Ansatz des Leitflächensterns in Anpassung an die umgebende Schaumrohrwandung vorzugsweise kegelförmig ausgebildet. Auf diese Weise erhält der Leitflächenstern etwa die Gestalt eines Doppelkegels. To this end, according to the invention, is in the air-foam generation pipe a baffle star is arranged within the sieve. Through this public policy the foam passing through the conical sieve becomes in different partial flows guided and thereby calmed and forced to a straight flow. Around To achieve the best possible effect, it is advisable to use the external shape of the guide surface star to match that of the sieve. The baffle star lies this is advantageous with its longitudinal edges on the inner wall of the sieve. Around to maintain the guidance of the foam up to close to the foam outlet, the Leitflächenstern expediently on an approach with which it enters the foam outlet nozzle protrudes. In the case of air foam generation pipes, which differ from their largest cross-section, at which the conical sieve ends, taper again towards the outlet nozzle, is the Approach of the guide surface star in adaptation to the surrounding foam tube wall is preferred conical educated. In this way, the baffle star is roughly shaped like a Double cone.

Es ist bereits ein Luftschaumerzeugungsrohr für Feuerlöschzwecke bekanntgeworden, bei dem ein vorzeitiges Auflösen und Zerflattern des aus der Rohrmündung austretenden Schaumstrahls dadurch vermieden wird, daß das Schaumerzeugungsrohr an seinem hinteren Ende als Doppelrohr ausgebildet ist und das innere Rohr infolge seiner besonderen kegeligen Ausbildung in Verbindung mit dem äußeren, am Ende enger werdenden Mischrohr zur Erzielung eines kegelförmigen Schaumringstrahles beim Austritt des Schaumes aus der Rohrmündung dient. Das bekannte Rohr enthält jedoch kein sich ir! der 'Strömungsrichtung erweiterndes kegelförmiges Sieb und auch keinen den Schaumstrom gleichrichtenden Leitflächenstern. It is already an air foam generation pipe for fire extinguishing purposes became known, in which a premature dissolution and fluttering of the from the muzzle escaping foam jet is avoided in that the foam generation pipe is designed as a double tube at its rear end and the inner tube as a result its special conical training in connection with the outer, narrower at the end developing mixing tube to achieve a conical foam ring jet at the outlet of the foam from the pipe mouth is used. However, the known pipe does not contain itself ir! the 'flow direction widening conical sieve and neither the foam flow rectifying baffle star.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. An exemplary embodiment of the invention is shown in the drawing.

Abb. I zeigt ein Luftschaumerzeugungsrohr gemäß der Erfindung in einem axialen Schnitt und Abb. 2 dasselbe Schaumrohr in einem Schnitt senkrecht zur Achse gemäß der Linie A-B der Abb. 1. Fig. I shows an air foam generating tube according to the invention in fig an axial section and Fig. 2 the same foam tube in a vertical section to the axis according to the line A-B of Fig. 1.

Die verschäumungsfähige Lösung tritt in Richtung von links durch die mit dem Schlauch verbundene Eingangskupplung I ein und wird durch die Zerteilerdüse 2 zerstäubt. Durch Injektorwirkung wird Luft von außen durch die Öffnungen 3 angesaugt. Das Gemisch aus Schaummittellösung und Luft durchströmt das Fangrohr 4 und trifft auf das durch einen Zentrierstern 5 gehaltene Kegelsieb 6 auf, das sich innerhalb des sich kegelförmig erweiternden Teiles 7 des Schaumrohres befindet und das zur Umwandlung des Schaumgemisches in einen gleichmäßig feinporigen, haltbaren Schaum wesentlich beiträgt. Nach Durchtritt durch das Kegelsieb 6 wird der Schaum durch den sich über die ganze Länge des Kegelsiebes erstreckenden Leitflächenstern 8 in einzelnen Strömungsbahnen geführt und dadurch beruhigt und zu einer geradlinigen Strömung gezwungen. Die Trennwände des Leitflächensterns können sowohl glatt und geschlossen als auch aufgerauht und durchbrochen sein. The foamable solution passes in the direction from the left the input coupling I connected to the hose and is through the splitter nozzle 2 atomized. Air is sucked in from the outside through the openings 3 by means of the injector effect. The mixture of foam concentrate solution and air flows through the catch tube 4 and hits on the held by a centering star 5 conical screen 6, which is within of the conically widening part 7 of the foam tube is and the for Conversion of the foam mixture into a uniform, fine-pored, durable foam contributes significantly. After passing through the conical sieve 6, the foam is through the guide surface star 8 extending over the entire length of the conical screen in guided individual flow paths and thereby calmed down and a rectilinear one Forced flow. The partitions of the baffle star can be both smooth and closed as well as roughened and perforated.

Der Leitflächenstern ragt mit einem Ansatz IO bis in die Schaumaustrittsdüse g hinein. Der Ansatz IO ist vorzugsweise ebenfalls kegelförmig ausgebildet und liegt mit seinen Längsrändern an der Innenwandung des sich verjüngenden Strahlrohrteils 1I an. Der gesamte Leitflächenstern hat daher die Gestalt eines Doppelkegels.The baffle star protrudes with a shoulder IO into the foam outlet nozzle g into it. The approach IO is preferably also conical and is located with its longitudinal edges on the inner wall of the tapered jet pipe part 1I at. The entire baffle star therefore has the shape of a double cone.

Der Leitflächenstern hat im ganzen die Wirkung, daß der Schaum in einem geschlossenen Strahl aus dem Schaumrohr austritt und diese Geschlossenheit über die gesamte Wurfweite im wesentlichen beibehält. Außerdem trägt der Leitflächenstern auch zur Verbesserung der Schaumqualität bei. The overall effect of the baffle star is that the foam in a closed jet emerges from the foam tube and this closeness Maintains essentially over the entire throw. In addition, the baffle star carries also contributes to improving the foam quality.

PATENTANSPR(CHL: I. Luftschaumerzeugungsrohr für Feuerlöschzwecke, das hinter dem Fangrohr ein sich in der Strömungsrichtung erweiterndes kegelförmiges Sieb enthält, dadurch gekennzeichnet, daß innerhalb des Siebes (6) ein Leitflächenstern (8) angeordnet ist. PATENT APPLICATION (CHL: I. Air foam generation pipe for fire extinguishing purposes, the one behind the catching tube is a conical one that widens in the direction of flow Contains sieve, characterized in that a guide surface star inside the sieve (6) (8) is arranged.

2. Luftschaumerzeugungsrohr nachAnspruch 1, dadurch gekennzeichnet, daß der Leitflächenstern (8) mit seinen Längsrändern an der Innenwandung des Siebes (6) anliegt. 2. Air foam generation pipe according to Claim 1, characterized in that that the guide surface star (8) with its longitudinal edges on the inner wall of the screen (6) is present.

Claims (1)

3. Luftschaumerzeugungsrohr nach Anspruch I oder 2, dadurch gekennzeichnet, daß der Leitflächenstern (8) einen Ansatz (IO) aufweist, mit dem er in die Schaumaustrittsdüse (9) hineinragt. 3. Air foam generation pipe according to claim I or 2, characterized in that that the guide surface star (8) has an approach (IO) with which it enters the foam outlet nozzle (9) protrudes. 4. Luftschaumerzeugungsrohr nachAnspruch 3, das sich von seinem größten Querschnitt, an dem das kegelförmige Sieb endet, nach.der Schaumaustrittsdüse hin wieder verjüngt, dadurch gekennzeichnet, daß der Ansatz (Io) des Leitflächensterns (8) kegelförmig ausgebildet ist und mit seinen Längsrändern an der Innenwandung des sich verjüngenden Strahlrohrteils (ii) anliegt, so daß der Leitflächenstern (8, Io) die Gestalt eines Doppelkegels hat. 4. An air foam generating tube according to claim 3, which differs from its largest Cross-section, at which the conical sieve ends, towards the foam outlet nozzle tapered again, characterized in that the approach (Io) of the guide surface star (8) is conical and with its longitudinal edges on the inner wall of the tapered jet pipe part (ii) rests, so that the guide surface star (8, Io) has the shape of a double cone. Angezogene Druckschriften: Deutsche Patentschriften Nr. 631 477, 7in 740. Attached publications: German patent specifications No. 631 477, 7in 740.
DEM319A 1949-10-31 1949-11-01 Air foam generation pipe for fire extinguishing purposes Expired DE838249C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0000319 1949-10-31

Publications (1)

Publication Number Publication Date
DE838249C true DE838249C (en) 1952-05-05

Family

ID=7290641

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM319A Expired DE838249C (en) 1949-10-31 1949-11-01 Air foam generation pipe for fire extinguishing purposes

Country Status (2)

Country Link
DE (1) DE838249C (en)
NL (1) NL77490C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103415327A (en) * 2010-10-19 2013-11-27 威尔法尔Hc有限责任公司 Focused stream, aerated foam projecting nozzle including fixed wand system and method, as well as possibly portable center pointing nozzle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631477C (en) * 1932-12-13 1936-06-20 Komet Kompagnie Fuer Optik Mec Air foam generator for fire extinguishing purposes
DE711740C (en) * 1938-02-09 1941-10-06 Martin Friedel Air foam generation pipe for fire extinguishing purposes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631477C (en) * 1932-12-13 1936-06-20 Komet Kompagnie Fuer Optik Mec Air foam generator for fire extinguishing purposes
DE711740C (en) * 1938-02-09 1941-10-06 Martin Friedel Air foam generation pipe for fire extinguishing purposes

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103415327A (en) * 2010-10-19 2013-11-27 威尔法尔Hc有限责任公司 Focused stream, aerated foam projecting nozzle including fixed wand system and method, as well as possibly portable center pointing nozzle
EP2629854A4 (en) * 2010-10-19 2015-03-11 Willfire Hc Llc Fixed systems and methods for extinguishing industrial tank fires, with and without fixed roof, including aerated foam projecting nozzles and center directed nozzles
EP2629852A4 (en) * 2010-10-19 2015-07-01 Tyco Fire & Security Gmbh Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
EP3042699A1 (en) * 2010-10-19 2016-07-13 Tyco Fire & Security GmbH Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
US9586069B2 (en) 2010-10-19 2017-03-07 Dwight P. Williams Fixed systems and methods for extinguishing industrial tank fires, with and without fixed roof, including aerated foam projecting nozzles and center directed nozzles
US10086223B2 (en) 2010-10-19 2018-10-02 Tyco Fire & Security Gmbh Fixed systems and methods for extinguishing industrial tank fires, with and without fixed roof, including aerated foam projecting nozzles and center directed nozzles
US10300317B2 (en) 2010-10-19 2019-05-28 Tyco Fire Products Lp Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
US10835770B2 (en) 2010-10-19 2020-11-17 Tyco Fire Products Lp Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
US10918896B2 (en) 2010-10-19 2021-02-16 Tyco Fire Products Lp Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
US11065485B2 (en) 2010-10-19 2021-07-20 Tyco Fire Products Lp Fixed systems and methods for extinguishing industrial tank fires, with and without fixed roof, including aerated foam projecting nozzles and center directed nozzles
US11338160B2 (en) 2010-10-19 2022-05-24 Tyco Fire Products Lp Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
US12017101B2 (en) 2010-10-19 2024-06-25 Tyco Fire Products Lp Fixed systems and methods for extinguishing industrial tank fires, with and without fixed roof, including aerated foam projecting nozzles and center directed nozzles

Also Published As

Publication number Publication date
NL77490C (en) 1955-03-15

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