EP0017644B1 - Foam thrower for fire-extinguishing purposes - Google Patents
Foam thrower for fire-extinguishing purposes Download PDFInfo
- Publication number
- EP0017644B1 EP0017644B1 EP80890018A EP80890018A EP0017644B1 EP 0017644 B1 EP0017644 B1 EP 0017644B1 EP 80890018 A EP80890018 A EP 80890018A EP 80890018 A EP80890018 A EP 80890018A EP 0017644 B1 EP0017644 B1 EP 0017644B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foam
- air
- tube
- discharge nozzle
- liquid
- 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
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Classifications
-
- 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
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
Definitions
- the invention relates to a foam launcher for fire-fighting purposes with a launcher tube which has air passage openings and which coaxially connects to an outlet nozzle of a liquid feed line housing, the outlet nozzle being assigned a longitudinally adjustable, cylindrical central tube for internal air feed line.
- foam can be produced in two different ways, one with the foam generation tube placed on the mouthpiece by supplying a foam-forming substance through a longitudinal bore of the guide body in the water jet emerging from the mouthpiece and the other time with the foam generation tube removed by supplying air through the Longitudinal bore in a mixture of water and foaming agent, which must be fed to the mouthpiece, so that either a foam generator with an attached foam generation tube, in which a solution of foam-generating substances is then fed centrally, or a foam generator without foam generation tube, with which air can be fed centrally.
- a foam generator with an internal air supply and an outer foam generation tube which also allows a flow rate regulation of the liquid, cannot be suggested.
- a snow cannon is also known in which a double-conical outlet nozzle arranged inside an outer snow tube is supplied with a water-air mixture, which outlet nozzle cooperates with a nozzle body seated on an actuating rod, in order to shape the emerging mixture to influence and size of the radiation core and to be able to adapt the function of the snow cannon to the atmospheric conditions.
- a simple flow adjustment device for regulating the amount of water alone.
- the invention is therefore based on the object to remedy these deficiencies and to provide a foam thrower of the type described, in which not only external and internal admixture of the air to the liquid jet is ensured, but moreover the flow rate of the liquid varies in a very simple manner as desired can be.
- the outlet nozzle has a cylindrical end section in a manner known per se and the central tube has a control bead with a cylindrical control section which is thickened compared to the mouth cross section of the central tube, which control section can be inserted into the end section of the outlet nozzle for adjusting the flow rate of the liquid.
- the displaceability of the central tube which was previously only required for cleaning and detoxifying the outlet nozzle, can now be used in a simple manner for throttling the liquid flow passing through the outlet nozzle by inserting the control bead into the outlet nozzle with the central tube and thus changing the ring cross section of the nozzle accordingly, the Adjustment of the central tube can be carried out without difficulty in any way, for example manually, pneumatically, electrically, directly or remotely, etc.
- control bead can be produced in itself in any suitable manner, but it is particularly advantageous if the control bead consists of a sleeve or the like which is pulled onto the central tube. In this case it is possible to replace the control bead and thereby optionally change the throttling options.
- a liquid supply housing 1 with a corresponding connection piece 2 opens via an outlet nozzle 3 into a launcher tube 4 which has air passage openings 5 distributed around the circumference.
- a central tube 6 is provided for an internal air supply, which via a Hand lever 7 is longitudinally adjustable in a bearing bush 8 of the liquid supply housing 1 and projects with its mouth region 9 through the outlet nozzle 3.
- a control bead 10 is formed on the central tube 6, which has an outer cross section which is enlarged compared to the mouth region 9 and can be inserted into the outlet nozzle 3 by adjusting the central tube 6.
- the annular passage cross section 11 of the outlet nozzle is changed in accordance with the shape of the control bead 10, which enables the liquid flow through the outlet nozzle 3 to be regulated. Since this adjustability depends on the diameter of the cylindrical control section of the control bead, the type of regulation can be adjusted as desired to suit different conditions by appropriate selection of the control sections, the production of the control bead itself being irrelevant and therefore having its own sleeve, a jacket reinforcement of the central tube or even a specific one Shape of the central tube can serve as a control bead.
- the drive for moving the central tube is not bound to the hand lever shown, but is possible in any suitable version.
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Description
Die Erfindung betrifft einen Schaumwerfer für Feuerlöschzwecke mit einem Luftdurchtrittsöffnungen aufweisenden Werferrohr, das koaxial an eine Austrittsdüse eines Flüssigkeitszuleitungsgehäuses anschließt, wobei der Austrittsdüse ein längsverstellbares, zylindrisches Zentralrohrfür innere Luftzuleitung zugeordnet ist.The invention relates to a foam launcher for fire-fighting purposes with a launcher tube which has air passage openings and which coaxially connects to an outlet nozzle of a liquid feed line housing, the outlet nozzle being assigned a longitudinally adjustable, cylindrical central tube for internal air feed line.
Um eine gute Schaumentwicklung zu erreichen, muß dafür gesorgt sein, daß dem Flüssigkeitsstrahl im Werfer eine ausreichende Menge Luft zugeführt und zugemischt werden kann. Es haben sich daher Werfer als besonders geeignet erwiesen, bei denen die Luft nicht nur durch entsprechende Durchtrittsöffnungen des Werferrohres dem Flüssigkeitsstrahl von außen zugeführt wird, sondern zusätzlich auch noch direkt in den Flüssigkeitsstrahl einströmen kann. Dazu ragt, wie die DE-A-1434944 zeigt, ein zentrales Luftrohr in die Austrittsdüse des Flüssigkeitszuleitungsgehäuses, so daß durch die nun ringförmige Austrittsdüse der Flüssigkeitsstrahl einen hohlen Sprühkegel bildet, in den durch das Luftrohr Luft eingesaugt wird. Die äußere und innere Zumischung der Luft zum Flüssigkeitsstrahl garantiert die gewünschte Schaumentwicklung. Zur Beeinflussung des Verschäumungsgrades ist es dabei möglich, die Luftdurchtrittsöffnungen des Werferrohres und die Ansaugöffnungen des Luftrohres teilweise oder ganz zu verschließen, wodurch unterschiedlich stabile Schäume oder sogar reine Flüssigkeitsstrahlen erzielt werden können. Der Nachteil dieser Schaumwerfer ist bisher die fehlende Regulierbarkeit des Flüssigkeitsstromes, wodurch eine Anpassung der Durchflußmenge an die jeweils gegebenen löschtechnischen Erfordernissse unmöglich ist.In order to achieve good foaming, it must be ensured that a sufficient amount of air can be added to the liquid jet in the turret and admixed. Throwers have therefore proven to be particularly suitable in which the air is not only fed to the liquid jet from the outside through corresponding through-openings of the thrower tube, but can also additionally flow directly into the liquid jet. For this purpose, as DE-A-1434944 shows, a central air tube protrudes into the outlet nozzle of the liquid supply housing, so that through the now annular outlet nozzle the liquid jet forms a hollow spray cone into which air is sucked in through the air tube. The external and internal admixture of air to the liquid jet guarantees the desired foam development. To influence the degree of foaming, it is possible to partially or completely close the air passage openings of the launcher tube and the suction openings of the air tube, as a result of which differently stable foams or even pure liquid jets can be achieved. The disadvantage of these foam throwers is the lack of controllability of the liquid flow, which makes it impossible to adapt the flow rate to the extinguishing requirements.
Gemäß der DE-C-652 241 gibt es auch schon einen Luftschaumerzeuger mit einem Leitkörper, der gegenüber einem Mundstück axial verschiebbar ist, um die Strahlenform ändern zu können. Außerdem läßt sich hier auf zwei verschiedene Arten Schaum erzeugen, und zwar einmal bei auf das Mundstück aufgesetztem Schaumerzeugungsrohr durch Zufuhr eines schaumbildenden Stoffes durch eine Längsbohrung des Leitkörpers in den aus dem Mundstück austretenden Wasserstrahl und das andere Mal bei abgenommenem Schaumerzeugungsrohr durch Zufuhr von Luft durch die Längsbohrung in ein Gemisch aus Wasser und Schaumbildner, das dem Mundstück zugeleitet werden muß, so daß entweder ein Schaumerzeuger mit aufgesetztem Schaumerzeugungsrohr, bei dem dann zentral eine Lösung schaumerzeugender Stoffe zugeführt wird, oder ein Schaumerzeuger ohne Schaumerzeugungsrohr vorliegt, bei dem zentral Luft zuführbar ist. Ein Schaumerzeuger mit innerer Luftzuführung und äußerem Schaumerzeugungsrohr, der noch dazu eine Durchflußmengenregulierung der Flüssigkeit ermöglicht, kann dadurch nicht nahegelegt werden.According to DE-C-652 241 there is already an air foam generator with a guide body which is axially displaceable relative to a mouthpiece in order to be able to change the beam shape. In addition, foam can be produced in two different ways, one with the foam generation tube placed on the mouthpiece by supplying a foam-forming substance through a longitudinal bore of the guide body in the water jet emerging from the mouthpiece and the other time with the foam generation tube removed by supplying air through the Longitudinal bore in a mixture of water and foaming agent, which must be fed to the mouthpiece, so that either a foam generator with an attached foam generation tube, in which a solution of foam-generating substances is then fed centrally, or a foam generator without foam generation tube, with which air can be fed centrally. A foam generator with an internal air supply and an outer foam generation tube, which also allows a flow rate regulation of the liquid, cannot be suggested.
Aus der FR-A-2 376 384 ist weiters eine Schneekanone bekannt, bei der einer innerhalb eines äußeren Schneerohres angeordneten doppelkegeligen Austrittsdüse ein Wasser-Luftgemisch zugeleitet wird, welche Austrittsdüse mit einem an einer Betätigungsstange sitzenden Düsenkörper zusammenwirkt, um das austretende Gemisch hinsichtlich der Form und Größe des Strahlenkernes zu beeinflussen und die Funktion der Schneekanone an die atmosphärischen Bedingungen anpassen zu können. Abgesehen davon, daß es hier keine innere Luftzufuhr gibt, findet sich auch keine Anregung für eine einfache Durchflußmengenverstelleinrichtung zur Regulierung der Wassermenge allein.From FR-A-2 376 384 a snow cannon is also known in which a double-conical outlet nozzle arranged inside an outer snow tube is supplied with a water-air mixture, which outlet nozzle cooperates with a nozzle body seated on an actuating rod, in order to shape the emerging mixture to influence and size of the radiation core and to be able to adapt the function of the snow cannon to the atmospheric conditions. Apart from the fact that there is no internal air supply, there is no suggestion for a simple flow adjustment device for regulating the amount of water alone.
Der Erfindung liegt daher die Aufgabe zugrunde, diese Mängel zu beseitigen und einen Schaumwerfer der eingangs geschilderten Art zu schaffen, bei dem nicht nur äußere und innere Zumischung der Luft zum Flüssigkeitsstrahl gewährleistet ist, sondern darüber hinaus noch auf einfachste Weise die Durchsatzmenge der Flüssigkeit wunschgemäß variiert werden kann.The invention is therefore based on the object to remedy these deficiencies and to provide a foam thrower of the type described, in which not only external and internal admixture of the air to the liquid jet is ensured, but moreover the flow rate of the liquid varies in a very simple manner as desired can be.
Die Erfindung löst diese Aufgabe dadurch, daß die Austrittsdüse in an sich bekannter Weise einen zylindrischen Endabschnitt besitzt und das Zentralrohr einen gegenüber dem Mündungsquerschnitt des Zentralrohres verdickten Steuerwulst mit zylindrischem Steuerabschnitt aufweist, welcher Steuerabschnitt zur Durchflußmengenverstellung der Flüssigkeit in den Endabschnitt der Austrittsdüse einschiebbar ist. Die bisher ausschließlich zur Reinigung und Entschlackung der Austrittsdüse erforderliche Verschiebbarkeit des Zentralrohres läßt sich nun auf einfache Weise zur Drosselung des die Austrittsdüse durchsetzenden Flüssigkeitsstromes heranziehen, indem mit dem Zentralrohr der Steuerwulst in die Austrittsdüse eingeschoben und damit der Ringquerschnitt der Düse entsprechend verändert wird, wobei die Verstellung des Zentralrohres schwierigkeitslos auf beliebige Art, beispielsweise händisch, pneumatisch, elektrisch, direkt oder ferngesteuert usw., vorgenommen werden kann.The invention solves this problem in that the outlet nozzle has a cylindrical end section in a manner known per se and the central tube has a control bead with a cylindrical control section which is thickened compared to the mouth cross section of the central tube, which control section can be inserted into the end section of the outlet nozzle for adjusting the flow rate of the liquid. The displaceability of the central tube, which was previously only required for cleaning and detoxifying the outlet nozzle, can now be used in a simple manner for throttling the liquid flow passing through the outlet nozzle by inserting the control bead into the outlet nozzle with the central tube and thus changing the ring cross section of the nozzle accordingly, the Adjustment of the central tube can be carried out without difficulty in any way, for example manually, pneumatically, electrically, directly or remotely, etc.
Der Steuerwulst ist an und für sich auf jede geeignete Art herstellbar, doch ist es besonders günstig, wenn der Steuerwulst aus einer auf das Zentralrohr aufgezogenen Manschette od. dgl. besteht. In diesem Fall ist es nämlich möglich, den Steuerwulst auszuwechseln und dadurch die Drosselmöglichkeiten wahlweise zu ändern.The control bead can be produced in itself in any suitable manner, but it is particularly advantageous if the control bead consists of a sleeve or the like which is pulled onto the central tube. In this case it is possible to replace the control bead and thereby optionally change the throttling options.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes rein schematisch im Horizontalschnitt dargestellt.In the drawing, an embodiment of the subject matter of the invention is shown purely schematically in horizontal section.
Ein Flüssigkeitszuleitungsgehäuse 1 mit einem entsprechenden Anschlußstutzen 2 mündet über eine Austrittsdüse 3 in ein Werferrohr 4, das am Umfang verteilt Luftdurchtrittsöffnungen 5 aufweist. Koaxial zum Werferrohr 4 und zur Austrittsdüse 3 ist ein Zentralrohr 6 für eine innere Luftzufuhr vorgesehen, das über einen Handhebel 7 längsverstellbar in einer Lagerbüchse 8 des Flüssigkeitszuleitungsgehäuses 1 geführt ist und mit seinem Mündungsbereich 9 durch die Austrittsdüse 3 ragt. Auf dem Zentralrohr 6 ist ein Steuerwulst 10 ausgebildet, der einen gegenüber dem Mündungsbereich 9 vergrößerten Außenquerschnitt besitzt und durch Verstellen des Zentralrohres 6 in die Austrittsdüse 3 einschiebbar ist. Dadurch wird der ringförmige Durchtrittsquerschnitt 11 der Austrittsdüse entsprechend der Form des Steuerwulstes 10 verändert, was eine Regulierung des Flüssigkeitsstromes durch die Austrittsdüse 3 ermöglicht. Da diese Regulierbarkeit vom Durchmesser des zylindrischen Steuerabschnittes des Steuerwulstes abhängt, kann durch entsprechende Wahl der Steuerabschnitte die Regulierungsart auf verschiedene Verhältnisse wunschgemäß abgestimmt werden, wobei die Herstellung des Steuerwulstes selbst keine Rolle spielt und daher eine eigene Manschette, eine Mantelverstärkung des Zentralrohres oder sogar eine bestimmte Form des Zentralrohres als Steuerwulst dienen kann. Auch der Antrieb zum Verschieben des Zentralrohres ist nicht an den dargestellten Handhebel gebunden, sondern in jeder geeigneten Ausführung möglich.A
Claims (1)
- A foam thrower for fire-extinguishing purposes, comprising a throwing tube (4), which has air passage openings (5) and coaxially succeeds a discharge nozzle (3) of a liquid supply housing (1), wherein the discharge nozzle (3) has associated with it a longitudinally adjustable cylindrical central pipe (6) for an internal supply of air, characterized in that the discharge nozzle (3) comprises in known manner a cylindrical end portion and the central pipe (6) comprises a control bulge (10), which is enlarged relative to the outlet cross-section of the central pipe (6) and has a cylindrical control portion, which is displaceable into the end portion of the discharge nozzle (3) for changing the flow rate of the liquid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0229079A AT365460B (en) | 1979-03-28 | 1979-03-28 | FOAMLAMP FOR FIRE-EXTINGUISHING PURPOSES |
| AT2290/79 | 1979-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0017644A1 EP0017644A1 (en) | 1980-10-15 |
| EP0017644B1 true EP0017644B1 (en) | 1984-04-04 |
Family
ID=3531603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80890018A Expired EP0017644B1 (en) | 1979-03-28 | 1980-02-13 | Foam thrower for fire-extinguishing purposes |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0017644B1 (en) |
| AT (1) | AT365460B (en) |
| DE (1) | DE3067310D1 (en) |
| DK (1) | DK131280A (en) |
| GR (1) | GR64439B (en) |
| NO (1) | NO800751L (en) |
| PL (1) | PL120094B1 (en) |
| YU (1) | YU39695B (en) |
| ZA (1) | ZA801210B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111063A (en) * | 2019-12-21 | 2020-05-08 | 国安达股份有限公司 | Special fire monitor for compressed air foam |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE702979C (en) * | 1932-12-13 | 1941-02-25 | Elektro Technik G M B H | Air foam generator |
| CH178366A (en) * | 1933-09-22 | 1935-07-15 | Feuerwehrgeraete Und Spritzenf | Device for generating water and foam jets for fire extinguishing purposes. |
| DE652241C (en) * | 1933-10-29 | 1937-10-27 | Feuerwehrgeraete U Spritzenfab | Air foam generator for fire extinguishing purposes |
| CH224514A (en) * | 1939-07-25 | 1942-11-30 | Albach & Co Sirenen & Armature | Air foam generator. |
| AT172999B (en) * | 1949-02-24 | 1952-11-10 | Minimax Ag | Device for generating air foam |
| FR1373855A (en) * | 1963-08-22 | 1964-10-02 | Le Materiel Ind De Prot M A I | Improvements to fire hoses, especially for the production of physical foam |
| FR2376384A1 (en) * | 1976-12-30 | 1978-07-28 | Cecil | Snow cannon for making ski slopes - has adjustable nozzles for water and air to suit different ambient conditions |
-
1979
- 1979-03-28 AT AT0229079A patent/AT365460B/en not_active IP Right Cessation
-
1980
- 1980-02-13 DE DE8080890018T patent/DE3067310D1/en not_active Expired
- 1980-02-13 EP EP80890018A patent/EP0017644B1/en not_active Expired
- 1980-02-25 YU YU504/80A patent/YU39695B/en unknown
- 1980-03-03 ZA ZA00801210A patent/ZA801210B/en unknown
- 1980-03-12 GR GR61416A patent/GR64439B/en unknown
- 1980-03-14 NO NO800751A patent/NO800751L/en unknown
- 1980-03-24 PL PL1980222971A patent/PL120094B1/en unknown
- 1980-03-27 DK DK131280A patent/DK131280A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO800751L (en) | 1980-09-29 |
| PL120094B1 (en) | 1982-02-27 |
| YU50480A (en) | 1983-04-30 |
| DK131280A (en) | 1980-09-29 |
| EP0017644A1 (en) | 1980-10-15 |
| DE3067310D1 (en) | 1984-05-10 |
| GR64439B (en) | 1980-03-21 |
| ATA229079A (en) | 1981-06-15 |
| ZA801210B (en) | 1981-03-25 |
| YU39695B (en) | 1985-03-20 |
| PL222971A1 (en) | 1980-12-01 |
| AT365460B (en) | 1982-01-25 |
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