EP3266503B1 - Use of a sieve and method to create foam - Google Patents

Use of a sieve and method to create foam Download PDF

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Publication number
EP3266503B1
EP3266503B1 EP17177762.6A EP17177762A EP3266503B1 EP 3266503 B1 EP3266503 B1 EP 3266503B1 EP 17177762 A EP17177762 A EP 17177762A EP 3266503 B1 EP3266503 B1 EP 3266503B1
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EP
European Patent Office
Prior art keywords
cage
spray plate
extinguishing fluid
extinguishing
outlet opening
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.)
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EP17177762.6A
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German (de)
French (fr)
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EP3266503A1 (en
Inventor
Jens Stubenrauch
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Fabrik Chemischer Praparate Von Dr Richard Sthamer & Co KG GmbH
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Fabrik Chemischer Praparate Von Dr Richard Sthamer & Co KG GmbH
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Application filed by Fabrik Chemischer Praparate Von Dr Richard Sthamer & Co KG GmbH filed Critical Fabrik Chemischer Praparate Von Dr Richard Sthamer & Co KG GmbH
Priority to PL17177762T priority Critical patent/PL3266503T3/en
Priority to SI201730158T priority patent/SI3266503T1/en
Publication of EP3266503A1 publication Critical patent/EP3266503A1/en
Application granted granted Critical
Publication of EP3266503B1 publication Critical patent/EP3266503B1/en
Priority to HRP20200057TT priority patent/HRP20200057T1/en
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    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/16—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for preventing non-intended contact between spray heads or nozzles and foreign bodies, e.g. nozzle guards

Definitions

  • the invention relates to a sprinkler with a cage for producing extinguishing foam from a foaming agent-containing extinguishing fluid (for example water) for combating fires.
  • a foaming agent-containing extinguishing fluid for example water
  • Fire-extinguishing foam consists essentially of air, water and a surfactant-containing foaming agent.
  • the extinguishing foam can be distinguished into fluorosurfactant-containing foams ("AFFF” or "A3F” foam extinguishing agent) and fluorosurfactant-free extinguishing foam, whose different mode of action is briefly explained below.
  • AFFF foaming agent When using AFFF foaming agent, the fluorosurfactants, due to their chemical structure different from conventional hydrocarbon surfactants, cause a vapor-tight, aqueous liquid film of usually 10-30 ⁇ m thickness between the burning surface and the foam. This fluorosurfactant caused water film acts as a barrier against the escape of fumes and prevents an inflammation. Because of these properties AFFF foam agents are also referred to as “film-forming foams", which is reflected in its abbreviated form "AFFF" or "A3F” for "A qeous F ilm F orming F oam".
  • Another significant advantage associated with film formation is that the foam layer deposited on the film does not have to have an outstanding barrier function, ie the foam must have no or only a low foaming number.
  • AFFF Foaming agents with a foaming of less than 4, usually between 1.5 and 3.0 sufficient, since the main quenching effect caused by the fluorine surfactant gas-tight liquid film on the burning surface is effected.
  • These aforementioned low foaming numbers are achieved using conventional sprinklers designed for operation with water or AFFF foam extinguishers.
  • these conventional sprinklers can not afford a higher foaming number because of their design. But then it has to technically complex special sprinklers, for example, in the DE 195 39 991 C1 disclosed type of a heavy foam sprinkler, are used, which are about 40% to 70% more expensive and the construction much more complicated than the conventional sprinklers.
  • Such heavy foam sprinklers are installed in particular where AFFF extinguishing foams must not be used due to the harmful properties of the fluorosurfactant component (persistent, bioaccumulating, toxic) or conventional sprinklers previously operated with AFFF extinguishing foam have to be converted to heavy foam sprinklers due to the prohibition of fluorosurfactants. See, for example, the application restrictions of Directive 2006/122 / EC. Since fluorosurfactant-free extinguishing foam lacks the film barrier in the absence of fluorosurfactants, essentially only the foam layer acquires the required barrier function. However, this is effective only from a VerDumungsiere of 4, from which one usually speaks of foam and the use of special above-mentioned Schwerschaumsprinkler requires.
  • the cage according to the invention is an accessory for a conventional sprinkler and serves to produce extinguishing foam from a foaming agent-containing extinguishing fluid.
  • the conventional sprinkler comprises an extinguishing fluid outlet opening, one to the extinguishing fluid outlet opening in the axial direction opposite spray plate and sprays the extinguishing fluid through the spray plate with a VerDumungsress that without the inventive cage is well below that of low foam (starting with a VerDumungsiere of 4).
  • Exemplary shielded sprayers of this type are the Victaulic Shield Sprayer V2704 (K80) and the Tyco Shield Sprayer TY315 (K80).
  • a cylindrical gap formed between the base area (G) of the spray plate and the extinguishing fluid outlet opening can be defined, the diameter of which corresponds to the outer diameter (d 1 ) of the spray plate and its height (h 1 ) starting from the center of the base area (G ) corresponds to the distance to the extinguishing fluid outlet opening.
  • the cage provided for sprinklers of this type has screen openings with a diameter between 1.00 mm and 7.00 mm and / or grid openings with a width between 1.00 and 7.00 mm and a length between 2.00 mm and 9, 00 mm, preferably formed by an expanded mesh, on, which allow the passing through the cage extinguishing fluid flow in combination with its specific dimensions to refine heavy foam.
  • expanded metal is particularly suitable (not deburred) expanded metal, because the sharp edges of the material cause a particularly good foaming.
  • the cage according to the invention covers the aforementioned Sprinkler formatraum, wherein the height (h 2 ) of the cage corresponds to at least 0.20 times the outer diameter (d 1 ) of the spray plate.
  • the inner diameter (d 2 ) of the cage alternatively the non-circular minimum distance between the opposite inner sides of the cage, at the height of the spray plate in the installed state at least equal to Outer diameter (d 1 ) of the spray plate.
  • a light dimension (b) can be defined as a gap
  • this clear dimension lies between the inside of the cage (1) and the spray plate (4) at the level of the spray plate according to a preferred embodiment of the invention circumferentially between the 0.10 to 3.00 times, preferably between 0.50 to 2.00 times, more preferably between 0.75 to 1.50 times, more preferably between 1.00 and 1.25 times the outside diameter (d 1 ) of the spray plate.
  • the invention has recognized that the radial distance between cage and spray plate has a direct influence on the VerDumungsiere and thus advantageously can vary. Comparative tests have shown that the foaming number increases with increasing distance.
  • the cage has a height which allows most of the extinguishing fluid deflected by the spray plate to pass through the cage according to the invention.
  • This height (h 2 ) of the cage is advantageously at least 0.50 times, preferably 0.75 times, more preferably 1.00 times the outside diameter (d 1 ) of the spray plate and may be, for example, the height (h 1 ) correspond to the Sprinkler responsibleraums.
  • the height (h 2 ) of the cage can be defined such that it corresponds to the height (h 1 ) of the sprinkler space, preferably less than 0.75 times that of the height (h 1 ) of the sprinkler space, more preferably less than 0.50 times that of the height (h 1 ) of the sprinkler space.
  • the cage according to the invention may have any suitable shape, for example the shape of a hollow cylinder, a hollow cone, a hollow truncated cone, a Holpyramide, a hollow sphere or a combination of these forms, wherein the hollow cylinder shape is particularly preferred.
  • the cage may extend in the axial direction tapering beyond its area that surrounds the gap and, for example, open into an opening with an inner diameter that is larger than the outer diameter (d 1 ) of the spray plate. The latter is particularly advantageous to allow unhindered falling out of small parts of the commonly used trigger elements (bursting with liquid, fusible link, etc.) from the sprinkler, which otherwise caught in the cage sieve or grid openings can prevent their intended function as VerDumungsetti.
  • the cage is shaped as a wood cylinder, the (upper) end facing the extinguishing fluid outlet opening is open over the entire diameter surface, while the opposite end tapers axially at the level of the spray plate and opens into an opening below the Sprühtellers.
  • the cage grid openings have a width between 2.00 mm and 6.00 mm and a length between 3.00 mm and 8.00 mm, preferably a width between 2.50 mm and 4.50 mm and a Length between 5.00 mm and 7.00 mm.
  • the cage grid can further advantageously, an expanded metal mesh with a mesh width between 2.50 mm and 4.50 mm, a mesh length of 5.00 mm to 7.00 mm and a thickness of 0.40 mm to 0.80 mm, preferably a mesh width of 3.50 mm, a mesh length of 6.00 mm and a thickness of 0.60 mm.
  • the cage has screen openings with a diameter of 1.50 mm to 2.50 mm, preferably 1.75 mm to 2.25 mm, particularly preferably 2.00 mm.
  • the cage is preferably made of metal, for example made of steel, and particularly preferably made of stainless steel (eg stainless steel V2A).
  • the cage further comprises a holder for attaching the cage to the sprinkler.
  • This support may, for example, be designed as retaining arms which fix the cage with the base of the sprinkler in the region of the extinguishing fluid outlet opening on the sprinkler body or on its connecting thread arranged above it, for example via several (for example 2, 3, 4, 5 or 6) clamping feet.
  • the support arms or clamp feet can be provided with predetermined breaking points for easier shortening in order to be able to make a positioning of the cage in relation to the sprinkler in a simple manner depending on the sprinkler and the installation conditions.
  • a securing element for example a binding element (cable tie, metal strip, etc.) that radially surrounds the retaining arms or clamping feet.
  • the cage according to the invention is particularly suitable for conventional shielded sprinklers, which can be upgraded or retrofitted with the aid of the cage in order to achieve higher foaming values. This is especially true for Foaming agent-containing fluorosurfactant-free extinguishing fluids in which the advantage of the cage is particularly significant.
  • the cage according to the invention it is possible with the cage according to the invention to produce extinguishing foam having a foaming number of from 3 to 9, preferably from 4 to 8, more preferably from 4.5 to 7, particularly preferably from 5 to 6.
  • the invention furthermore relates to the use of a set or an assembly which, in addition to the sprinkler, comprises the above-described cage according to the invention.
  • the sprinkler itself is known from the prior art and comprises an extinguishing fluid outlet opening and a spray plate which is opposite the extinguishing fluid outlet opening in the axial direction, as described in more detail above in connection with the cage.
  • the arrangement of the set or assembly is such that the cage envelops the space formed on the base (G) of the spray plate such that the base (G) of the spray plate is flush with the underside of the cage remote from the extinguishing fluid outlet ,
  • the invention furthermore relates to the use of the above-described cage, set or assembly according to the invention for the production of extinguishing foam from a foaming agent-containing extinguishing fluid and to a method for producing extinguishing foam from a foaming agent-containing extinguishing fluid.
  • the method comprises the steps of providing a foaming agent-containing extinguishing fluid and an assembly described above, as well as the passage of the extinguishing fluid deflected from the extinguishing fluid outlet and the spray plate through the cage according to the invention, wherein the extinguishing foam is formed with the passage of the extinguishing fluid through the cage from the extinguishing fluid.
  • the foaming numbers are significantly lower than those for heavy foam starting at about 4.
  • the test series also shows that there are three different ones Fluorosurfactant-free extinguishing fluids, which are designed for deviating foaming behavior, show hardly any deviating expansion numbers when using the cage according to the invention.
  • FIG. 1 shows the structure of a conventional sprinkler 2 in combination with the inventive cage 1.
  • the sprinkler 2 has at its head part an external thread for screwing into a corresponding wall, floor or ceiling installation and at the opposite end an extinguishing fluid outlet opening 3.
  • the head part of the sprinkler. 3 resting on a bridge which comprises two side-down to a support together running supports which open into a support and formed on the underside of a spray plate 4 with a diameter d 1 , a base G and at a distance h 1 to the extinguishing fluid outlet opening 3 is.
  • the cage 1 has an upper cylindrical portion with a diameter d 2 and a lower conical portion, wherein the conical portion opens into an opening.
  • the upper cylindrical portion of the cage 1 with a height h 2 terminates at the level of the spray plate 4 and is spaced therefrom with a clearance b.
  • the cage comprises the intermediate space 5 between the spray plate 4 and the extinguishing fluid outlet opening 3 by means of (dashed) generatrices.
  • the cage 1 is clamped by means of retaining arms 6 to the head part of the sprinkler 2.

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  • 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)
  • Nozzles (AREA)
  • Housing For Livestock And Birds (AREA)

Description

Die Erfindung betrifft einen Sprinkler mit einem Käfig zur Erzeugung von Löschschaum aus einem Schaummittel enthaltenden Löschfluid (z.B. Wasser) zur Bekämpfung von Bränden.The invention relates to a sprinkler with a cage for producing extinguishing foam from a foaming agent-containing extinguishing fluid (for example water) for combating fires.

Feuerlöschschaum besteht in Wesentlichen aus Luft, Wasser und einem Tensid haltigen Schaummittel. In Bezug auf das Tensid haltige Schaummittel lässt sich der Löschschaum in Fluortensid enthaltende Schäume ("AFFF" oder "A3F" Schaumlöschmittel) und Fluortensid freien Löschschaum unterscheiden, deren unterschiedliche Wirkungsweise nachfolgend kurz erläutert wird.Fire-extinguishing foam consists essentially of air, water and a surfactant-containing foaming agent. With respect to the surfactant-containing foaming agent, the extinguishing foam can be distinguished into fluorosurfactant-containing foams ("AFFF" or "A3F" foam extinguishing agent) and fluorosurfactant-free extinguishing foam, whose different mode of action is briefly explained below.

Bei der Verwendung von AFFF Schaummittel bewirken die Fluortenside aufgrund ihrer zu herkömmlichen Kohlenwasserstofftensiden verschieden chemischen Struktur einen dampfdichten, wässerigen Flüssigkeitsfilm von üblicherweise 10-30 µm Dicke zwischen der brennenden Oberfläche und dem Schaum. Dieser Fluortensid verursachte Wasserfilm wirkt als Barriere gegen den Austritt von Brandgutdämpfen und unterbindet eine Widerentzündung. Aufgrund dieser Eigenschaften werden AFFF Schaummittel auch als "filmbildende Schäume" bezeichnet, was sich in deren Abkürzung "AFFF" oder "A3F" für "Aqeous Film Forming Foam" wiederspiegelt. Ein weiterer wesentlicher mit der Filmbildung einhergehender Vorteil besteht darin, dass der auf dem Film auflagernden Schaumschicht keine überragende Barrierefunktion zukommen muss, d.h. der Löschschaum keine oder nur eine geringe Verschäumungszahl aufweisen muss. In der Praxis ist daher eine effektive Brandbekämpfung unter Verwendung AFFF Schaummitteln mit einer Verschäumungszahl von weniger als 4, üblicherweise zwischen 1,5 und 3,0 ausreichend, da der Hauptlöscheffekt durch den Fluortensid verursachten gasdichten Flüssigkeitsfilm auf der brennenden Oberfläche bewirkt wird. Diese vorgenannten geringen Verschäumungszahlen werden bei der Verwendung herkömmlicher für den Betrieb mit Wasser oder AFFF Schaumlöschmitteln ausgelegten Sprinkler erreicht. Eine höhere Verschäumungszahl können diese herkömmlichen Sprinkler aufgrund ihrer Bauart jedoch nicht leisten. Dafür muss dann auf technisch aufwendige Spezialsprinkler, beispielsweise der in der DE 195 39 991 C1 offenbarten Bauart eines Schwerschaumsprinklers, zurückgegriffen werden, die ca. 40% bis 70% teurer und vom Aufbau deutlich komplizierter als die herkömmlichen Sprinkler sind.When using AFFF foaming agent, the fluorosurfactants, due to their chemical structure different from conventional hydrocarbon surfactants, cause a vapor-tight, aqueous liquid film of usually 10-30 μm thickness between the burning surface and the foam. This fluorosurfactant caused water film acts as a barrier against the escape of fumes and prevents an inflammation. Because of these properties AFFF foam agents are also referred to as "film-forming foams", which is reflected in its abbreviated form "AFFF" or "A3F" for "A qeous F ilm F orming F oam". Another significant advantage associated with film formation is that the foam layer deposited on the film does not have to have an outstanding barrier function, ie the foam must have no or only a low foaming number. In practice, therefore, is an effective fire fighting using AFFF Foaming agents with a foaming of less than 4, usually between 1.5 and 3.0 sufficient, since the main quenching effect caused by the fluorine surfactant gas-tight liquid film on the burning surface is effected. These aforementioned low foaming numbers are achieved using conventional sprinklers designed for operation with water or AFFF foam extinguishers. However, these conventional sprinklers can not afford a higher foaming number because of their design. But then it has to technically complex special sprinklers, for example, in the DE 195 39 991 C1 disclosed type of a heavy foam sprinkler, are used, which are about 40% to 70% more expensive and the construction much more complicated than the conventional sprinklers.

Derartige Schwerschaumsprinkler werden insbesondere dort verbaut, wo AFFF Löschschäume aufgrund der schädlichen Eigenschaften der Fluortensidkomponente (persistent, bioakkumulierend, toxisch) nicht verwendet werden dürfen oder herkömmliche zuvor mit AFFF Löschschaum betriebene Sprinkler aufgrund des Verbots von Fluortensiden auf Schwerschaumsprinkler umgerüstet werden müssen. Siehe dazu beispielsweise die Anwendungsbeschränkungen der Richtlinie 2006/122/EG. Da Fluortensid freiem Löschschaum in Ermangelung der Fluortenside die Filmbarriere fehlt, kommt im Wesentlichen allein der Schaumschicht die erforderliche Barrierefunktion zu. Diese ist jedoch erst effektiv ab einer Verschäumungszahl von 4, ab der man üblicherweise von Schwerschaum spricht und den Einsatz spezieller oben genannter Schwerschaumsprinkler erfordert.Such heavy foam sprinklers are installed in particular where AFFF extinguishing foams must not be used due to the harmful properties of the fluorosurfactant component (persistent, bioaccumulating, toxic) or conventional sprinklers previously operated with AFFF extinguishing foam have to be converted to heavy foam sprinklers due to the prohibition of fluorosurfactants. See, for example, the application restrictions of Directive 2006/122 / EC. Since fluorosurfactant-free extinguishing foam lacks the film barrier in the absence of fluorosurfactants, essentially only the foam layer acquires the required barrier function. However, this is effective only from a Verschäumungszahl of 4, from which one usually speaks of foam and the use of special above-mentioned Schwerschaumsprinkler requires.

Vorliegende Erfindung stellt sich die Aufgabe, den oben dargestellten Zielkonflikt, d.h.

  • einerseits dem gewünschten Verzicht auf Fluortenside in dem Löschmittel,
  • andererseits die gewünschte Vermeidung des Einsatzes oder die Umrüstung herkömmlicher Sprinkler mit einer unzureichenden Verschäumungszahl auf technisch aufwendigere Schwerschaumsprinkler,
auf möglichst einfache Art und Weise zu lösen, vorzugsweise im Wege einer "Universallösung" für herkömmliche Sprinkler mit Verschäumungszahlen von weniger als 4, so dass der Ersatz der herkömmlichen Sprinkler durch teurere Schwerschaumsprinkler (einschließlich des Aus- und Einbauaufwands und der damit verbundenen Dichtigkeitsproben) vermieden werden kann. Dabei soll die Lösung vorzugsweise sowohl für Fluortensid-haltige, als auch Fluortensidfreie Löschmittel praktikabel sein. Letzteres insbesondere vor dem Hintergrund diese Sprinkler auch in Zukunft bei einem drohendem vollständigen Verbot von Fluortensid haltigen Schaumlöschmitteln bestimmungsgemäß verwenden zu dürfen.The present invention has as its object the conflict of objectives described above, ie
  • on the one hand the desired waiver of fluorosurfactants in the extinguishing agent,
  • on the other hand the desired avoidance of the use or the conversion of conventional sprinklers with an insufficient foaming number on technically more complicated foam sprinklers,
to solve in the simplest possible way, preferably by means of a "universal solution" for conventional sprinklers with Verschäumungszahlen of less than 4, so that the replacement of conventional sprinklers by expensive Schwerschaumsprinkler (including the removal and installation effort and the associated tightness samples) avoided can be. The solution should preferably be practicable both for fluorosurfactant-containing, and fluorosurfactant-free extinguishing agent. The latter especially against the background of these sprinklers allowed to use in the future with a threatening complete ban on fluorosurfactant-containing foam extinguishers as intended.

Gelöst wird diese Aufgabe durch Verwendung eines einem vorgenannte herkömmliche Sprinkler ergänzenden Käfigs mit Merkmalen gemäß den beigefügten unabhängigen Ansprüchen, der es erlaubt herkömmliche Sprinkler mit unzureichender Verschäumungszahl von üblicherweise weniger als 4 auf einfache Art und Weise zu Schwerschaumsprinklern umzurüsten. Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen offenbart. Im Einzelnen:
Der erfindungsgemäße Käfig ist ein Ergänzungsteil für einen herkömmlichen Sprinkler und dient zur Erzeugung von Löschschaum aus einem Schaummittel enthaltenden Löschfluid. Der herkömmliche Sprinkler umfasst eine Löschfluidaustrittsöffnung, einen zu der Löschfluidaustrittsöffnung in axialer Richtung gegenüberliegenden Sprühteller und versprüht das Löschfluid über den Sprühteller mit einer Verschäumungszahl, die ohne dem erfindungsgemäßen Käfig deutlich unterhalb der von Schwerschaum (beginnend mit einer Verschäumungszahl von 4) liegt. Beispielhaft genannte Schirmsprinkler dieser Bauart sind der Victaulic Schirmsprinkler V2704 (K80) und der Tyco Schirmsprinkler TY315 (K80). Bei Sprinklern dieser herkömmlichen Bauart lässt sich ein zwischen der Grundfläche (G) des Sprühtellers und der Löschfluidaustrittsöffnung gebildeter zylindrischer Zwischenraum definieren, dessen Durchmesser dem Außendurchmesser (d1) des Sprühtellers entspricht und dessen Höhe (h1) ausgehend von dem Mittelpunkt der Grundfläche (G) dem Abstand zu der Löschfluidaustrittsöffnung entspricht. Erfindungsgemäß weist der für Sprinkler dieser Bauart vorgesehene Käfig Sieböffnungen mit einem Durchmesser zwischen 1,00 mm und 7,00 mm und/oder Gitteröffnungen mit einer Breite zwischen 1,00 und 7,00 mm und einer Länge zwischen 2,00 mm und 9,00 mm, vorzugsweise gebildet durch ein Streckgitter, auf, die es erlauben den durch den Käfig hindurchtretenden Löschfluidstrom in Kombination mit seinen spezifischen Abmessungen zu Schwerschaum zu veredeln. Als Streckgitter ist besonders (nicht entgratetes) Streckmetall geeignet, weil die scharfen Kanten des Materials eine besonders gute Verschäumung bewirken. Die auch auf den Sprinkler abgestimmten Abmessungen erlauben es den erfindungsgemäßen Käfig den zuvor erwähnten Sprinklerzwischenraum zu ummanteln, wobei die Höhe (h2) des Käfigs mindestens dem 0,20-fachen des Außendurchmessers (d1) des Sprühtellers entspricht. Des Weiteren entspricht der Innendurchmesser(d2) des Käfigs, alternativ der nicht kreisrunde Mindestabstand zwischen den gegenüberliegenden Innenseiten des Käfigs, auf Höhe des Sprühtellers im eingebauten Zustand mindestens dem Außendurchmesser (d1) des Sprühtellers. Sofern der erfindungsgemäße Käfig mit seiner Innenseite nicht unmittelbar am Sprühteller radial anliegt, d.h. sich ein lichtes Maß (b) als Zwischenraum definieren lässt, so liegt dieses lichte Maß zwischen der Innenseite des Käfigs (1) und dem Sprühteller (4) auf Höhe des Sprühtellers gemäß einer bevorzugten Ausführungsform der Erfindung umlaufend zwischen dem 0,10 bis 3,00-fachen, vorzugsweise zwischen dem 0,50 bis 2,00-fachen, weiter vorzugsweise zwischen dem 0,75 bis 1,50-fachen, weiter vorzugsweise zwischen dem 1,00 und 1,25-fachen des Außendurchmessers (d1) des Sprühtellers. Die Erfindung hat erkannt, dass der radiale Abstand zwischen Käfig und Sprühteller unmittelbaren Einfluss auf die Verschäumungszahl hat und damit vorteilhafterweise variieren lässt. Vergleichsversuche haben gezeigt, dass sich mit zunehmenden Abstand die Verschäumungszahl ansteigt. Von besonderen Vorteil ist dabei ein 0,75 bis 1,50-facher Abstand bezogen auf den Außendurchmessers (d1) des Sprühtellers, bei der sich besonders vorteilhafte Verschäumungszahlen von 4-7 einstellen und der Schaum (im Unterschied zu Schaum mit höheren Abstand bedingten höheren Verschäumungszahlen) noch ausreichend homogen ist.This object is achieved by using a cage supplementing the aforementioned conventional sprinkler having features according to the appended independent claims, which allows conventional sprinklers with insufficient foaming number of usually less than 4 to be easily converted into heavy foam sprinklers. Advantageous embodiments of the invention are disclosed in the subclaims. In detail:
The cage according to the invention is an accessory for a conventional sprinkler and serves to produce extinguishing foam from a foaming agent-containing extinguishing fluid. The conventional sprinkler comprises an extinguishing fluid outlet opening, one to the extinguishing fluid outlet opening in the axial direction opposite spray plate and sprays the extinguishing fluid through the spray plate with a Verschäumungszahl that without the inventive cage is well below that of low foam (starting with a Verschäumungszahl of 4). Exemplary shielded sprayers of this type are the Victaulic Shield Sprayer V2704 (K80) and the Tyco Shield Sprayer TY315 (K80). In sprinklers of this conventional type, a cylindrical gap formed between the base area (G) of the spray plate and the extinguishing fluid outlet opening can be defined, the diameter of which corresponds to the outer diameter (d 1 ) of the spray plate and its height (h 1 ) starting from the center of the base area (G ) corresponds to the distance to the extinguishing fluid outlet opening. According to the invention, the cage provided for sprinklers of this type has screen openings with a diameter between 1.00 mm and 7.00 mm and / or grid openings with a width between 1.00 and 7.00 mm and a length between 2.00 mm and 9, 00 mm, preferably formed by an expanded mesh, on, which allow the passing through the cage extinguishing fluid flow in combination with its specific dimensions to refine heavy foam. As expanded metal is particularly suitable (not deburred) expanded metal, because the sharp edges of the material cause a particularly good foaming. The also matched to the sprinkler dimensions allow the cage according to the invention to cover the aforementioned Sprinklerzwischenraum, wherein the height (h 2 ) of the cage corresponds to at least 0.20 times the outer diameter (d 1 ) of the spray plate. Furthermore, the inner diameter (d 2 ) of the cage, alternatively the non-circular minimum distance between the opposite inner sides of the cage, at the height of the spray plate in the installed state at least equal to Outer diameter (d 1 ) of the spray plate. If the cage according to the invention with its inside does not lie directly on the spray plate radially, ie a light dimension (b) can be defined as a gap, this clear dimension lies between the inside of the cage (1) and the spray plate (4) at the level of the spray plate according to a preferred embodiment of the invention circumferentially between the 0.10 to 3.00 times, preferably between 0.50 to 2.00 times, more preferably between 0.75 to 1.50 times, more preferably between 1.00 and 1.25 times the outside diameter (d 1 ) of the spray plate. The invention has recognized that the radial distance between cage and spray plate has a direct influence on the Verschäumungszahl and thus advantageously can vary. Comparative tests have shown that the foaming number increases with increasing distance. Of particular advantage is a 0.75 to 1.50 times the distance based on the outer diameter (d 1 ) of the spray plate, in which set particularly advantageous Verschäumungszahlen 4-7 and the foam (in contrast to foam with higher distance conditional higher Verschäumungszahlen) is still sufficiently homogeneous.

Vorteilhafterweise weist der Käfig eine Höhe auf, die es ermöglicht den Großteil des von der Sprühteller umgelenkten Löschfluids durch den erfindungsgemäßen Käfig hindurchzuleiten. Diese Höhe (h2) des Käfigs beträgt vorteilhafterweise mindestens dem 0,50-fachen, vorzugsweise dem 0,75-fachen, weiter vorzugsweise dem 1,00-fachen des Außendurchmessers (d1) des Sprühtellers und kann beispielsweise der Höhe (h1) des Sprinklerzwischenraums entsprechen. Ausgehend von der Höhe (h1) des Sprinklerzwischenraums lässt sich die Höhe (h2) des Käfigs gemäß einer bevorzugten Ausführungsform aus so definieren, dass sie der Höhe (h1) des Sprinklerzwischenraums, vorzugsweise weniger als dem 0,75-fachen der der Höhe (h1) des Sprinklerzwischenraums, weiter vorzugsweise weniger als dem 0,50-fachen der der Höhe (h1) des Sprinklerzwischenraums entspricht.Advantageously, the cage has a height which allows most of the extinguishing fluid deflected by the spray plate to pass through the cage according to the invention. This height (h 2 ) of the cage is advantageously at least 0.50 times, preferably 0.75 times, more preferably 1.00 times the outside diameter (d 1 ) of the spray plate and may be, for example, the height (h 1 ) correspond to the Sprinklerzwischenraums. Starting from the height (h 1 ) of the sprinkler gap, the height (h 2 ) of the cage according to a preferred embodiment can be defined such that it corresponds to the height (h 1 ) of the sprinkler space, preferably less than 0.75 times that of the height (h 1 ) of the sprinkler space, more preferably less than 0.50 times that of the height (h 1 ) of the sprinkler space.

Der erfindungsgemäße Käfig kann jede geeignete Form aufweisen, beispielsweise die Form eines Hohlzylinder, eines Hohlkegel, eines Hohlkegelstumpf, einer Holpyramide, einer Hohlkugel oder eine Kombination dieser Formen, wobei die Hohlzylinderform besonders bevorzug ist. Des Weiteren kann sich der Käfig über seinen den Zwischenraum ummantelnden Bereich hinaus in axiale Richtung verjüngend erstrecken und beispielsweise in eine Öffnung mit einem Innendurchmesser münden, der größer als der Außendurchmesser (d1) des Sprühtellers ist. Letzteres ist insbesondere von Vorteil um ein ungehindertes Herausfallen von Kleinteilen der üblicherweise verwendeten Auslöseelemente (Berstelement mit Flüssigkeit, Schmelzlot etc.) aus dem Sprinkler zu ermöglichen, die andernfalls im Käfig gefangen die Sieb- bzw. Gitteröffnungen von ihrer bestimmungsgemäßen Funktion als Verschäumungselemente abhalten können. Gemäß einer besonders bevorzugten Ausführungsform ist der Käfig als Holzylinder geformt, dessen der Löschfluidaustrittsöffnung zugewandtes (oberes) Ende über die gesamte Durchmesserfläche offen ist, während sich das gegenüberliegende Ende auf Höhe des Sprühtellers axial verjüngt und in eine Öffnung unterhalb des Sprühtellers mündet.The cage according to the invention may have any suitable shape, for example the shape of a hollow cylinder, a hollow cone, a hollow truncated cone, a Holpyramide, a hollow sphere or a combination of these forms, wherein the hollow cylinder shape is particularly preferred. Furthermore, the cage may extend in the axial direction tapering beyond its area that surrounds the gap and, for example, open into an opening with an inner diameter that is larger than the outer diameter (d 1 ) of the spray plate. The latter is particularly advantageous to allow unhindered falling out of small parts of the commonly used trigger elements (bursting with liquid, fusible link, etc.) from the sprinkler, which otherwise caught in the cage sieve or grid openings can prevent their intended function as Verschäumungselemente. According to a particularly preferred embodiment, the cage is shaped as a wood cylinder, the (upper) end facing the extinguishing fluid outlet opening is open over the entire diameter surface, while the opposite end tapers axially at the level of the spray plate and opens into an opening below the Sprühtellers.

Gemäß einer bevorzugten Ausführungsform der Erfindung weisen die Käfiggitteröffnungen eine Breite zwischen 2,00 mm und 6,00 mm und einer Länge zwischen 3,00 mm und 8,00 mm, vorzugsweise eine Breite zwischen 2,50 mm und 4,50 mm und einer Länge zwischen 5,00 mm und 7,00 mm auf. Das Käfiggitter kann des Weiteren vorteilhafterweise ein Streckgitter mit einer Maschenbreite zwischen 2,50 mm und 4,50 mm, einer Maschenlänge von 5,00 mm bis 7,00 mm und einer Dicke von 0,40 mm bis 0,80 mm, vorzugsweise einer Maschenbreite von 3,50 mm, eine Maschenlänge von 6,00 mm und einer Dicke von 0,60 mm sein. Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung weist der Käfig Sieböffnungen mit einem Durchmesser von 1,50 mm bis 2,50 mm, vorzugsweise 1,75 mm bis 2,25 mm, besonders bevorzugt von 2,00 mm auf. Der Käfig ist bevorzugt aus Metall, z.B. aus Stahl, und besonders bevorzugt aus Edelstahl hergestellt (z.B. Edelstahl V2A).According to a preferred embodiment of the invention, the cage grid openings have a width between 2.00 mm and 6.00 mm and a length between 3.00 mm and 8.00 mm, preferably a width between 2.50 mm and 4.50 mm and a Length between 5.00 mm and 7.00 mm. The cage grid can further advantageously, an expanded metal mesh with a mesh width between 2.50 mm and 4.50 mm, a mesh length of 5.00 mm to 7.00 mm and a thickness of 0.40 mm to 0.80 mm, preferably a mesh width of 3.50 mm, a mesh length of 6.00 mm and a thickness of 0.60 mm. According to a further preferred embodiment of the invention, the cage has screen openings with a diameter of 1.50 mm to 2.50 mm, preferably 1.75 mm to 2.25 mm, particularly preferably 2.00 mm. The cage is preferably made of metal, for example made of steel, and particularly preferably made of stainless steel (eg stainless steel V2A).

Gemäße einer bevorzugten Ausführungsform der Erfindung weist der Käfig des Weiteren eine Halterung zum Befestigen des Käfigs am Sprinkler auf. Dies Halterung kann beispielsweise als Haltearme ausgebildet sein, die den Käfig mit der Basis des Sprinklers im Bereich der Löschfluidaustrittsöffnung am Sprinklerkorpus oder an seinem darüber angeordneten Anschlussgewinde befestigen, beispielsweise über mehrere (z.B. 2, 3, 4, 5 oder 6) Klemmfüße. Die Haltearme bzw. Klemmfüße können zum leichteren Einkürzen mit Sollbruchstellen versehen sein um in Abhängigkeit vom Sprinkler und den Einbaugegebenheiten auf einfache Art und Weise eine Positionierung des Käfigs in Bezug auf den Sprinkler vornehmen zu können. Für einen sicheren Halt der Haltearme bzw. Klemmfüße am Sprinkler können diese zusätzlich mit einem Sicherungselement, beispielsweise einem um die Haltearme oder Klemmfüße radial umfassenden Bindeelement (Kabelbinder, Metallband etc.) gesichert sein.According to a preferred embodiment of the invention, the cage further comprises a holder for attaching the cage to the sprinkler. This support may, for example, be designed as retaining arms which fix the cage with the base of the sprinkler in the region of the extinguishing fluid outlet opening on the sprinkler body or on its connecting thread arranged above it, for example via several (for example 2, 3, 4, 5 or 6) clamping feet. The support arms or clamp feet can be provided with predetermined breaking points for easier shortening in order to be able to make a positioning of the cage in relation to the sprinkler in a simple manner depending on the sprinkler and the installation conditions. For a secure hold of the retaining arms or clamping feet on the sprinkler, these can additionally be secured with a securing element, for example a binding element (cable tie, metal strip, etc.) that radially surrounds the retaining arms or clamping feet.

Wie eingangs erwähnt ist der erfindungsgemäße Käfig insbesondere für herkömmliche Schirmsprinkler geeignet, die mit Hilfe des Käfigs auf- bzw. nachgerüstet werden können um höhere Verschäumungswerte zu erreichen. Dies gilt insbesondere für Schaummittel enthaltende Fluortensid-freie Löschfluide, bei denen der Vorteil des Käfigs besonders zum Tragen kommt. Bei diesen herkömmlichen Sprinklern lässt sich mit dem erfindungsgemäßen Käfig vorzugsweise Löschschaum mit einer Verschäumungszahl von 3 bis 9, vorzugsweise von 4-8, weiter vorzugsweise von 4,5 bis 7, besonders bevorzugt von 5-6 erzeugen.As mentioned above, the cage according to the invention is particularly suitable for conventional shielded sprinklers, which can be upgraded or retrofitted with the aid of the cage in order to achieve higher foaming values. This is especially true for Foaming agent-containing fluorosurfactant-free extinguishing fluids in which the advantage of the cage is particularly significant. In these conventional sprinklers, it is possible with the cage according to the invention to produce extinguishing foam having a foaming number of from 3 to 9, preferably from 4 to 8, more preferably from 4.5 to 7, particularly preferably from 5 to 6.

Gegenstand der Erfindung ist des Weiteren Verwendung eines Sets oder einer Baugruppe, die neben dem Sprinkler den oben beschriebenen erfindungsgemäßen Käfig umfasst. Der Sprinkler selbst ist aus dem Stand der Technik bekannt und umfasst eine Löschfluidaustrittsöffnung und einem zu der Löschfluidaustrittsöffnung in axialer Richtung gegenüberliegenden Sprühteller, wie oben bereits im Zusammenhang mit dem Käfig näher beschrieben. Gemäß einer bevorzugten Ausführungsform der Erfindung ist die Anordnung des Sets oder der Baugruppe so, der Käfig den auf der Grundfläche (G) des Sprühtellers gebildeten Zwischenraum ummantelt, so dass die Grundfläche (G) des Sprühtellers mit der von der Löschfluidaustrittsöffnung abgewandten Unterseite des Käfigs fluchtet.The invention furthermore relates to the use of a set or an assembly which, in addition to the sprinkler, comprises the above-described cage according to the invention. The sprinkler itself is known from the prior art and comprises an extinguishing fluid outlet opening and a spray plate which is opposite the extinguishing fluid outlet opening in the axial direction, as described in more detail above in connection with the cage. According to a preferred embodiment of the invention, the arrangement of the set or assembly is such that the cage envelops the space formed on the base (G) of the spray plate such that the base (G) of the spray plate is flush with the underside of the cage remote from the extinguishing fluid outlet ,

Gegenstand der Erfindung ist des Weiteren die Verwendung des oben beschriebenen erfindungsgemäßen Käfigs, Sets oder der Baugruppe für die Erzeugung von Löschschaum aus einem Schaummittel enthaltenden Löschfluid sowie ein Verfahren zur Erzeugung von Löschschaum aus einem Schaummittel enthaltenden Löschfluid. Das Verfahren umfasst die Schritte der Bereitstellung eines Schaummittel enthaltenden Löschfluids und einer oben erläuterten Baugruppe, sowie die Durchleitung des aus der Löschfluidaustrittsöffnung und vom Sprühteller umgelenkten Löschfluids durch den erfindungsgemäßen Käfig, wobei der Löschschaum mit Durchtritt des Löschfluids durch den Käfig aus dem Löschfluid entsteht.The invention furthermore relates to the use of the above-described cage, set or assembly according to the invention for the production of extinguishing foam from a foaming agent-containing extinguishing fluid and to a method for producing extinguishing foam from a foaming agent-containing extinguishing fluid. The method comprises the steps of providing a foaming agent-containing extinguishing fluid and an assembly described above, as well as the passage of the extinguishing fluid deflected from the extinguishing fluid outlet and the spray plate through the cage according to the invention, wherein the extinguishing foam is formed with the passage of the extinguishing fluid through the cage from the extinguishing fluid.

Anhand der beigefügten Beispiele und Figuren wird die vorliegende Erfindung nachfolgend näher beschrieben.Reference to the accompanying examples and figures, the present invention will be described in more detail below.

Beispiel 1example 1

In einer Testreihe wurden nachfolgende Sprinkler ohne (A) bzw. mit erfindungsgemäßen Käfig (B, C, D) sowie ein Referenz-Schwerschaumsprinkler (E) getestet und die Verschäumungen entsprechend DIN EN 1568 gemessen. Der Test wurde mit 3 verschiedenen Fluortensid-freien Löschfluiden, wie in der nachfolgenden Tabelle spezifiziert, bei unterschiedlichen Drücken (1 bar, 2 bar und 3 bar) durchgeführt. Da keine signifikanten Unterschiede bei unterschiedlichen untersuchten Drücken festzustellen sind, gibt die nachfolgende Tabelle die gemessenen Verschäumungszahlen bei einem Druck von 2 bar an.

  1. A - Tyco Schirmsprinkler (stehend) TY315 (K80) ohne Käfig (Referenz) ;
  2. B - Victaulic Schirmsprinkler (stehend) V2704 (K80) mit dem erfindungsgemäßen Käfigring direkt anliegend an der Außenkante des Sprühtellers und hergestellt aus Edelstahl (V2A)-Streckmetall mit einer Maschenbreite von 3,5 mm, einer Maschenlänge von 6 mm und einer Blechdicke von 0,6 mm;
  3. C - Victaulic Schirmsprinkler (stehend) V2704 (K80) mit dem erfindungsgemäßen Käfigring mit einem umlaufenden lichtem Maß von 4 cm zu der Außenkante des Sprühtellers und hergestellt aus Edelstahl (V2A)-Streckmetall mit einer Maschenbreite von 3,5 mm, einer Maschenlänge von 6 mm und einer Blechdicke von 0,6 mm;
  4. D - Jomos Schirmsprinkler (hängend) (K80) mit dem erfindungsgemäßen Käfig in Siebform aus V2A-Edelstahl mit einem Sieböffnungsdurchmesser von 2 mm und beabstandet zu der Außenkante des Sprühtellers auf Sprühtellerhöhe mit umlaufend 3,5 cm;
  5. E - Minimax Schwerschaumsprinkler (hängend) MX5 (K80) analog der in DE 195 39 991 C1 beschriebenen und von vorliegender Erfindung technisch grundverschiedener Bauart. Dieser Schaumwassersprinkler weist in Fließrichtung des Löschschaums hinter dem Sprinkler und entlang der Sprinklerlängsachse einen Sprühteller mit Öffnungen und nachfolgend ein Schaumsieb auf. Der Löschschaum trifft im freien Strahl aus der Sprinkleraustrittsöffnung auf den Sprühteller. Dabei wird ein Teil des Löschschaums durch den Sprühteller verteilt, während ein anderer Teil des Löschschaumes durch die Sprühtelleröffnungen tritt und durch das dahinterliegende Schaumsieb zu großen Schaumblasen veredelt wird.
Verschäumungszahl für Löschfluid A B C D E Moussol-APS 1/3 F-0 #3471 2,11 4,02 8,69 6,97 4,97 Sthamex 3% F-15 #9348 2,40 4,80 10,58 7,37 6,35 Silvara 1% F-15 2,36 3,72 8,25 6,40 5,32 In a series of tests, subsequent sprinklers without (A) or with a cage according to the invention (B, C, D) and a reference heavy foam sprinkler (E) were tested and the foams were measured in accordance with DIN EN 1568. The test was carried out with 3 different fluorosurfactant-free extinguishing fluids, as specified in the table below, at different pressures (1 bar, 2 bar and 3 bar). Since there are no significant differences for different pressures tested, the following table gives the measured foaming rates at a pressure of 2 bar.
  1. A - Tyco shield sprayer (upright) TY315 (K80) without cage (reference);
  2. B - Victaulic Shade Sprinkler (upright) V2704 (K80) with the cage ring of the invention directly adjacent to the outer edge of the spray plate and made of stainless steel (V2A) expanded metal with a mesh width of 3.5 mm, a mesh length of 6 mm and a sheet thickness of 0 , 6 mm;
  3. C - Victaulic Shade Sprinkler (upright) V2704 (K80) with the cage ring according to the invention with a circumferential light measure of 4 cm to the outer edge of the spray plate and made of stainless steel (V2A) expanded metal with a mesh width of 3.5 mm, a mesh length of 6 mm and a sheet thickness of 0.6 mm;
  4. D - Jomos screen sprayer (suspended) (K80) with the cage according to the invention in screen form made of V2A stainless steel with a sieve opening diameter of 2 mm and spaced to the outer edge of the spray plate at the spray plate height with circulating 3.5 cm;
  5. E - Minimax heavy foam sprinkler (suspended) MX5 (K80) similar to the one in DE 195 39 991 C1 described and of the present invention technically fundamentally different design. This foam water sprinkler has in the flow direction of the extinguishing foam behind the sprinkler and along the Sprinklerlängsachse a spray plate with openings and subsequently a foam screen. The extinguishing foam hits in the free jet from the sprinkler outlet opening on the spray plate. In this case, a portion of the extinguishing foam is distributed through the spray plate, while another part of the extinguishing foam passes through the Sprühtelleröffnungen and is refined by the underlying foam screen to large foam bubbles.
Foaming number for extinguishing fluid A B C D e Moussol APS 1/3 F-0 # 3471 2.11 4.02 8.69 6.97 4.97 Sthamex 3% F-15 # 9348 2.40 4.80 10.58 7.37 6.35 Silvara 1% F-15 2.36 3.72 8.25 6.40 5.32

Der herkömmliche Sprinkler als solches (A), d.h. ohne dem erfindungsgemäßen Käfig, zeigte wie erwartet keine ausreichende Verschäumung. Die Verschäumungszahlen liegen deutlich unter der für Schwerschaum beginnend mit etwa 4. Eine entsprechend ausreichende Verschäumung wird jedoch unter Anwendung des erfindungsgemäßen Käfigs erzielt (B, C, D) der eine Schwerschaumerzeugung mit Verschäumungswerten analog den bautechnisch verschiedenen Referenz-Schwerschaumsprinkler (E) ermöglicht. Die Testreihe zeigt ebenfalls, dass drei verschiedene Fluortensid freie Löschfluide, die für abweichende Anschäumverhalten konzipiert sind, kaum abweichende Verschäumungszahlen beim Einsatz des erfindungsgemäßen Käfigs zeigen.The conventional sprinkler as such (A), ie without the cage according to the invention, as expected, did not show sufficient foaming. The foaming numbers are significantly lower than those for heavy foam starting at about 4. A correspondingly adequate foaming, however, achieved using the cage according to the invention (B, C, D) of a foam production with foaming analogous to the structurally different reference Schwerschaumsprinkler (E) allows. The test series also shows that there are three different ones Fluorosurfactant-free extinguishing fluids, which are designed for deviating foaming behavior, show hardly any deviating expansion numbers when using the cage according to the invention.

Des Weiteren zeigen

Fig. 1
einen Sprinkler mit dem erfindungsgemäßen Käfig in Seitenansicht zeigt und
Fig. 2
die oben unter Beispiel 1 untersuchten Sprinkler mit den verwendeten Adaptern.
Further show
Fig. 1
shows a sprinkler with the cage according to the invention in side view and
Fig. 2
the sprinklers studied above under Example 1 with the adapters used.

Figur 1 zeigt den Aufbau eines herkömmlichen Sprinklers 2 in Kombination mit dem erfindungsgemäßen Käfig 1. Der Sprinkler 2 weist an seinem Kopfteil ein Außengewinde zum Einschrauben in eine entsprechende Wand-, Boden- oder Deckeninstallation auf und am gegenüberliegenden Ende eine Löschfluidaustrittsöffnung 3. Der Kopfteil des Sprinklers 3 ruht auf einer Brücke, die zwei seitlich nach unten zu einem Träger zusammen laufende Stützen umfasst, die in einen Träger münden und an dessen Unterseite ein Sprühteller 4 mit einem Durchmesser d1, einer Grundfläche G und in einem Abstand h1 zur der Löschfluidaustrittsöffnung 3 angeformt ist. Der Käfig 1 weist einen oberen zylindrischen Bereich mit einem Durchmesser d2 und einen unteren konischen Bereich auf, wobei der konische Bereich in eine Öffnung mündet. Der obere zylindrische Bereich des Käfigs 1 mit einer Höhe h2 endet auf dem Niveau des Sprühtellers 4 und ist zu diesem mit einem lichten Maß b beabstandet. Der Käfig umfasst den zwischen Sprühteller 4 und Löschfluidaustrittsöffnung 3 mittels (gestrichelten) Mantellinien dargestellten Zwischenraum 5. Der Käfig 1 ist über Haltearme 6 mit dem Kopfteil des Sprinklers 2 verklammert. FIG. 1 shows the structure of a conventional sprinkler 2 in combination with the inventive cage 1. The sprinkler 2 has at its head part an external thread for screwing into a corresponding wall, floor or ceiling installation and at the opposite end an extinguishing fluid outlet opening 3. The head part of the sprinkler. 3 resting on a bridge which comprises two side-down to a support together running supports which open into a support and formed on the underside of a spray plate 4 with a diameter d 1 , a base G and at a distance h 1 to the extinguishing fluid outlet opening 3 is. The cage 1 has an upper cylindrical portion with a diameter d 2 and a lower conical portion, wherein the conical portion opens into an opening. The upper cylindrical portion of the cage 1 with a height h 2 terminates at the level of the spray plate 4 and is spaced therefrom with a clearance b. The cage comprises the intermediate space 5 between the spray plate 4 and the extinguishing fluid outlet opening 3 by means of (dashed) generatrices. The cage 1 is clamped by means of retaining arms 6 to the head part of the sprinkler 2.

Figur 2 zeigt

  1. A - den Tyco Schirmsprinkler (stehend) TY315 (K80) ohne Käfig (Referenz);
  2. B - den Victaulic Schirmsprinkler (stehend) V2704 (K80) mit dem erfindungsgemäßen Käfigring direkt anliegend an der Außenkante des Sprühtellers und hergestellt aus Edelstahl (V2A)-Streckmetall mit einer Maschenbreite von 3,5 mm, einer Maschenlänge von 6 mm und einer Blechdicke von 0,6 mm;
  3. C - den Victaulic Schirmsprinkler (stehend) V2704 (K80) mit dem erfindungsgemäßen Käfigring mit einem umlaufenden lichtem Maß von 4 cm zu der Außenkante des Sprühtellers und hergestellt aus Edelstahl (V2A)-Streckmetall mit einer Maschenbreite von 3,5 mm, einer Maschenlänge von 6 mm und einer Blechdicke von 0,6 mm;
  4. D - den Jomos Schirmsprinkler (hängend) (K80) mit dem erfindungsgemäßen Käfig in Siebform aus V2A-Edelstahl mit einem Sieböffnungsdurchmesser von 2 mm und beabstandet zu der Außenkante des Sprühtellers auf Sprühtellerhöhe mit umlaufend 3,5 cm;
  5. E - den Minimax Schwerschaumsprinkler (hängend) MX5 (K80) analog der in DE 195 39 991 C1 beschriebenen und von vorliegender Erfindung technisch grundverschiedener Bauart.
FIG. 2 shows
  1. A - the Tyco shield sprinkler (upright) TY315 (K80) without cage (reference);
  2. B - the Victaulic Shade Sprinkler (upright) V2704 (K80) with the cage ring according to the invention directly adjacent to the outer edge of the spray plate and made of stainless steel (V2A) expanded metal with a mesh width of 3.5 mm, a mesh length of 6 mm and a sheet thickness of 0.6 mm;
  3. C - the Victaulic Shade Sprinkler (upright) V2704 (K80) with the cage ring according to the invention with a circumferential light measure of 4 cm to the outer edge of the spray plate and made of stainless steel (V2A) expanded metal with a mesh width of 3.5 mm, a mesh length of 6 mm and a sheet thickness of 0.6 mm;
  4. D - the Jomos screen sprayer (suspended) (K80) with the cage according to the invention in screen form of V2A stainless steel with a Sieböffnungsdurchmesser of 2 mm and spaced from the outer edge of the spray plate on spray plate height with circulating 3.5 cm;
  5. E - the Minimax heavy foam sprinkler (suspended) MX5 (K80) similar to the one in DE 195 39 991 C1 described and of the present invention technically fundamentally different design.

Claims (17)

  1. Use of a cage (1) for producing extinguishing foam from an extinguishing fluid containing foaming agent and a sprinkler (2), comprising
    - an extinguishing fluid outlet opening (3),
    - a spray plate (4) located in the axial direction opposite the extinguishing fluid outlet opening (3) and having a base surface (G) and an outer diameter (d1) and
    - a cylindrical interspace (5) which is formed between the base surface (G) of the spray plate (4) and the extinguishing fluid outlet opening (3), of which the diameter corresponds to the outer diameter (d1) of the spray plate (4) and of which the height (h1), starting from the centre of the base surface (G), corresponds to the distance to the extinguishing fluid outlet opening (3),
    characterized in that the cage (1) encases the said cylindrical interspace (5) between the base surface (G) of the spray plate (4) and the extinguishing fluid outlet opening (3), and wherein the cage (1)
    a) has sieve openings with a diameter between 1.00 mm and 7.00 mm and/or lattice openings with a width between 1.00 and 7.00 mm and a length between 2.00 mm and 9.00 mm, preferably formed by an expanded mesh,
    b) encases the aforesaid cylindrical interspace (5) between the base surface (G) of the spray plate (4) and the extinguishing fluid outlet opening (3) and has dimensions which permit the said interspace (5) to be encased as follows, radially with a height (h2) and a width (d2) :
    - the height (h2) of the cage (1) corresponds to at least 0.2 times the outer diameter (d1) of the spray plate (4),
    - the inner diameter (d2) of the cage (1), alternatively the non-circular minimum spacing between the opposite inner sides of the cage (1), at the height of the spray plate (4) corresponds to at least the outer diameter (d1) of the spray plate (4) .
  2. Use of a cage (1) according to Claim 1, characterized in that the clear dimension (b) between the inner side of the cage (1) and the spray plate (4), running around at the height of the spray plate, is between 0.10 to 3.00 times, preferably between 0.5 to 2.00 times, more preferably between 0.75 to 1.50 times, more preferably between 1.00 and 1.25 times, the outer diameter (d1) of the spray plate (4).
  3. Use of a cage (1) according to either of the preceding claims, characterized in that the height (h2) of the cage (1) corresponds at least to 0.5 times, preferably 0.75 times, more preferably 1.00 times, the outer diameter (d1) of the spray plate (4), more preferably corresponds to the height (h1) of the interspace (5).
  4. Use of a cage (1) according to one of the preceding claims, characterized in that the height (h2) of the cage (1) corresponds to the height (h1) of the interspace (5), preferably to less than 0.75 times the height (h1) of the interspace (5), more preferably to less than 0.5 times the height (h1) of the interspace (5).
  5. Use of a cage (1) according to one of the preceding claims, characterized in that the cage (1) has a shape which is selected from the group comprising hollow cylinder, hollow cone, hollow truncated cone, hollow pyramid, hollow sphere or a combination of these shapes.
  6. Use of a cage (1) according to one of the preceding claims, characterized in that the cage (1) extends in a manner tapering in the axial direction over its region encasing the interspace (5).
  7. Use of a cage (1) according to Claim 6, characterized in that the region that tapers in the axial direction ends in an opening with an inner diameter which is greater than the outer diameter (d1) of the spray plate (4).
  8. Use of a cage (1) according to one of the preceding claims, characterized in that the lattice openings have a width between 2.00 mm and 6.00 mm and a length between 3.00 mm and 8.00 mm, preferably a width between 2.50 mm and 4.50 mm and a length between 5.00 mm and 7.00 mm.
  9. Use of a cage (1) according to one of the preceding claims, characterized in that the expanded mesh has a mesh width between 2.50 mm and 4.50 mm, a mesh length of 5.00 mm 7.00 mm and a thickness of 0.40 mm to 0.80 mm, preferably a mesh width of 3.50 mm, a mesh length of 6.00 mm and a thickness of 0.60 mm.
  10. Use of a cage (1) according to one of Claims 1-7, characterized in that the sieve openings have a diameter of 1.50 mm to 2.50 mm, preferably 1.75 mm to 2.25 mm, particularly preferably of 2.00 mm.
  11. Use of a cage (1) according to one of the preceding claims, characterized in that the cage (1) is made of metal, preferably of steel, more preferably of stainless steel.
  12. Use of a cage (1) according to one of the preceding claims, characterized in that the cage (1) has a holder (6) for fixing the cage (1) to the sprinkler (2).
  13. Use of a cage (1) according to one of the preceding claims, characterized in that the extinguishing fluid does not comprise any foaming agent containing fluorinated surfactant.
  14. Use of a cage (1) according to one of the preceding claims, characterized in that the extinguishing foam produced by the cage has an expansion ratio of 3 to 9, preferably of 4-8, more preferably of 4.5 to 7, particularly preferably of 5-6.
  15. Use of a set or an assembly for producing extinguishing foam from an extinguishing fluid containing foaming agent, the said set or assembly comprising
    i) a sprinkler (2) for spraying an extinguishing fluid, having
    - an extinguishing fluid outlet opening (3),
    - a spray plate (4) located in the axial direction opposite the extinguishing fluid outlet opening (3) and having a base surface (G) and an outer diameter (d1) and
    - a cylindrical interspace (5) which is formed between the base surface (G) of the spray plate (4) and the extinguishing fluid outlet opening (3), of which the diameter corresponds to the outer diameter (d1) of the spray plate (4) and
    ii) a cage (1) for use according to one of the preceding claims, characterized in that the cage (1) encases the said cylindrical interspace (5) between the base surface (G) of the spray plate (4) and the extinguishing fluid outlet opening (3).
  16. Use of a set or an assembly according to Claim 15, characterized in that the cage (1) encases the interspace (5) formed on the base surface (G) of the spray plate (4), so that the base surface (G) of the spray plate (4) is aligned with the underside of the cage (1) facing away from the extinguishing fluid outlet opening (3).
  17. Method for producing extinguishing foam from an extinguishing fluid containing foaming agent, comprising the steps:
    i) providing an extinguishing fluid containing foaming agent and an assembly for use according to either of Claims 15-16, and
    ii) leading the extinguishing fluid out of the extinguishing fluid outlet opening (3) deflected by the spray plate (4) through the cage (1), wherein the extinguishing foam is produced from the extinguishing fluid as the extinguishing fluid passes through the cage (1).
EP17177762.6A 2016-07-07 2017-06-26 Use of a sieve and method to create foam Active EP3266503B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL17177762T PL3266503T3 (en) 2016-07-07 2017-06-26 Use of a sieve and method to create foam
SI201730158T SI3266503T1 (en) 2016-07-07 2017-06-26 Use of a sieve and method to create foam
HRP20200057TT HRP20200057T1 (en) 2016-07-07 2020-01-15 Use of a sieve and method to create foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016212391.2A DE102016212391B4 (en) 2016-07-07 2016-07-07 Schaumwassersprinkler

Publications (2)

Publication Number Publication Date
EP3266503A1 EP3266503A1 (en) 2018-01-10
EP3266503B1 true EP3266503B1 (en) 2019-10-16

Family

ID=59215629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17177762.6A Active EP3266503B1 (en) 2016-07-07 2017-06-26 Use of a sieve and method to create foam

Country Status (13)

Country Link
US (1) US10603532B2 (en)
EP (1) EP3266503B1 (en)
CN (1) CN107583221B (en)
DE (1) DE102016212391B4 (en)
DK (1) DK3266503T3 (en)
ES (1) ES2767362T3 (en)
HR (1) HRP20200057T1 (en)
HU (1) HUE047992T2 (en)
LT (1) LT3266503T (en)
PL (1) PL3266503T3 (en)
PT (1) PT3266503T (en)
RU (1) RU2700725C2 (en)
SI (1) SI3266503T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH713571A1 (en) * 2017-03-15 2018-09-28 Jomos Eurosprinkler Ag Foams and foam sprinklers.
DE202022102724U1 (en) 2022-05-18 2022-07-14 Gi-Ro Technik Gmbh & Co. Kg Protective cage for a sprinkler head attached to a fire-fighting water line

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Publication number Priority date Publication date Assignee Title
US3797746A (en) * 1972-08-17 1974-03-19 Hodgman Mfg Co Inc Sprinkler guard
JP2604717Y2 (en) * 1993-04-23 2000-06-05 千住スプリンクラー株式会社 Sealing plate for sprinkler head
US5803363A (en) * 1993-11-02 1998-09-08 Sumitomo Chemical Company, Limited Liquid sprinkler having a hemispherical head with a pattern of nozzle openings
JP3073876B2 (en) 1994-03-31 2000-08-07 ホーチキ株式会社 Fire fighting foam head
DE19539991C1 (en) 1995-10-27 1997-02-27 Preussag Ag Minimax Fire-fighting water-foam sprinkler
US5893418A (en) * 1997-12-15 1999-04-13 The Reliable Automatic Sprinkler Co., Inc. Sprinkle guard
US6484809B1 (en) * 2000-05-09 2002-11-26 Innatech, Llc Molded sprinkler cover assembly and method for manufacturing the same
ES2335982T3 (en) * 2003-12-17 2010-04-07 Claude Ciocca FIRE EXTINGUISHING SYSTEM WITH FOAM.
US20070256844A1 (en) * 2006-04-20 2007-11-08 Blasing Joseph M Method and apparatus for lock out-tag out of sprinkler heads
US7699116B2 (en) * 2007-12-13 2010-04-20 Fm Global Technologies Anti-skipping sprinkler
JP5161664B2 (en) 2008-06-12 2013-03-13 ホーチキ株式会社 Closed foam fire extinguishing head
US9302132B2 (en) 2009-03-25 2016-04-05 The Viking Corporation Sprinkler skipping shield with improved airflow

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
PL3266503T3 (en) 2020-05-18
LT3266503T (en) 2020-01-10
SI3266503T1 (en) 2020-03-31
CN107583221A (en) 2018-01-16
DE102016212391B4 (en) 2019-06-13
RU2017123573A (en) 2019-01-09
DE102016212391A1 (en) 2018-01-11
US10603532B2 (en) 2020-03-31
US20180064974A1 (en) 2018-03-08
RU2017123573A3 (en) 2019-07-30
PT3266503T (en) 2020-01-22
CN107583221B (en) 2020-06-16
DK3266503T3 (en) 2020-01-27
HUE047992T2 (en) 2020-05-28
RU2700725C2 (en) 2019-09-19
HRP20200057T1 (en) 2020-04-03
EP3266503A1 (en) 2018-01-10
ES2767362T3 (en) 2020-06-17

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