EP0333924A2 - Flametrap with extensive heat exposure resistance - Google Patents

Flametrap with extensive heat exposure resistance Download PDF

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Publication number
EP0333924A2
EP0333924A2 EP88120693A EP88120693A EP0333924A2 EP 0333924 A2 EP0333924 A2 EP 0333924A2 EP 88120693 A EP88120693 A EP 88120693A EP 88120693 A EP88120693 A EP 88120693A EP 0333924 A2 EP0333924 A2 EP 0333924A2
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EP
European Patent Office
Prior art keywords
flame arrester
fitting according
melting
jacket
flame
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Granted
Application number
EP88120693A
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German (de)
French (fr)
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EP0333924B1 (en
EP0333924A3 (en
Inventor
Hubert Dipl.-Ing. Leinemann
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Individual
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Individual
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Priority to AT88120693T priority Critical patent/ATE72761T1/en
Publication of EP0333924A2 publication Critical patent/EP0333924A2/en
Publication of EP0333924A3 publication Critical patent/EP0333924A3/en
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Publication of EP0333924B1 publication Critical patent/EP0333924B1/en
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes

Definitions

  • the invention relates to a permanently fire-resistant flame arrester fitting with a hinged protective hood arranged above the flame arrester, which is held in the closed position by a melting element and opens when the melting element loses its stability when a permanent fire occurs.
  • Such flame arrester fittings have been known for a long time (see, for example, DE 949 100).
  • the flame arrester armatures installed at the end of an opening to be protected must ensure, due to the flame arrester, protection against ignition failure against atmospheric explosions as well as long-lasting burn-up (permanent fire).
  • the protective hood protects the flame arrester from the ingress of rain and snow or dirt particles from the atmosphere, which could impair the function of the flame arrester, namely the propagation of ignition into the interior of the protected container or the protected pipeline. If there is an ignition of escaping product-vapor or gas / air mixtures on the outside of the flame arrester, the Protective hood must be removed so that the flame arrester does not heat up to ignition temperature due to heat reflection.
  • the protective hood is no longer held in the closed position, but instead folds up or down due to a corresponding weight distribution or due to spring forces.
  • the melting elements In order to prevent the flame arresters from heating up too much, the melting elements must respond relatively quickly. In addition, they must have sufficient mechanical strength and, particularly when the devices are used in chemical plants, also good corrosion resistance.
  • Known melting elements are holding bolts or screw connections made of an easily burnable plastic (e.g. easily burnable acrylic glass) or of an easily meltable metal (e.g. a lead-zinc alloy).
  • the plastics used lack sufficient corrosion resistance with sufficient mechanical strength, while the easily fusible metals have inadequate strength with relatively good corrosion resistance.
  • the invention has for its object to provide a flame-retardant valve of the type mentioned at the outset with a melting element which has good corrosion resistance with sufficient mechanical strength.
  • the melting element has an outer, two-part jacket made of thermally conductive, stable material, the two jacket parts of which are held together by a melting core which is positively connected to the two jacket parts.
  • the different functions have been divided up into different parts of the melting element.
  • the Corrosion resistance is guaranteed by the sheath that surrounds the melting core as well as the mechanical stability, for example of screw connections, which can be easily attached to the stable material of the sheath.
  • the melting function i.e. the opening of the protective cover in the event of a permanent fire, is carried out by the melting core, which holds the two jacket parts together due to a positive fit, so that the two jacket parts separate from one another during the melting of the melting core due to a permanent fire, whereby the protective hood is opened.
  • the melting core which is preferably formed by a low-melting metal, is poured into the mating shell parts through an opening in the heated state.
  • the jacket parts can have an inner space that tapers conically to their abutting surface and is filled by the melting core.
  • the jacket parts have cylindrical interior spaces with radial anchoring grooves.
  • the opening for pouring the fusible core preferably has an internal thread with which the corresponding jacket part is screwed to the protective hood or to a stationary housing part of the fitting, so that the opening is closed again by the screw connection.
  • Both metal parts preferably have such internal threads, which are preferably designed with different diameters to avoid incorrect assembly.
  • the material of the jacket is preferably a solid, corrosion-resistant metal, preferably stainless steel.
  • the parting surfaces of the two shell parts are by the Opening the protective hood tending force preferably loaded on train.
  • the separating surfaces can have an anti-rotation device to prevent rotation about an axis of rotation lying in the pulling direction, as a result of which, in the case of axial internal threads on the jacket parts, when the fastening screws are screwed in, a torsional force acting on the melting core is avoided.
  • the one jacket part is formed with an external hexagon and the other jacket part is round on the outside. If the melting element is then arranged centrally on the flame arrester, the casing part with the external hexagon can simultaneously form a holder for a frame holding the flame arresters. A wing screw holding the protective hood can be screwed into the outer round jacket part.
  • a chemical-resistant sealing compound can be introduced between the separating surfaces of the jacket parts.
  • Such a sealing compound can also seal the internal thread of the jacket parts.
  • FIG. 1 to 3 show a permanently fire-resistant flame arrester fitting 1, which is flanged to the end of a pipeline 2 in a conventional manner.
  • the flame arrester fitting 1 has a housing part 3 which conically widens the pipe cross section of the pipeline 2 and which carries at its extended end a frame 4 for a flame arrester 5 known per se.
  • the flame arrester 5 can be inserted into the opened frame 4, whereupon the frame 4 is closed by means of a bolt 6.
  • the flame arrestor 5 assembled in this way is covered by a protective hood 7, which can be swung open into the position shown in FIG. 3 on a swivel joint 8 attached to the housing part 3. In the closed state shown in FIG.
  • the protective hood 7 is under a pretension that tends to open, which in the exemplary embodiment shown is generated by a spring 9 on the swivel joint 8. Against this bias, the protective hood 7 is held in the closed state, ie covering the flame arrester 5, by means of a screw connection 10 which runs through the center of the flame arrester 5 and the protective hood 7.
  • the screw connection consists of a screw 11 projecting through a central opening in the frame 4 and the flame arrester 5, which is inserted from the pipe-side end of the frame 4.
  • the threaded end of the screw 11 projects into an internal thread of a first jacket part 12, which is held together with a second jacket part 13.
  • FIG. 2 illustrates that the cohesion of the two jacket parts 12, 13 is brought about by a fusible core 15 which holds the two jacket parts 12, 13 together by positive locking.
  • the fusible core 15 is preferably formed from a low-melting metal which is poured into the mated shell parts 12, 13.
  • the melting element can also be formed from other castable melting materials that have sufficient mechanical stability. It is also possible to produce the positive connection between the melt core 15 and the jacket parts 12, 13 in a manner other than by pouring the liquefied melt core 15, for example by a guide in the manner of a bayonet lock.
  • the preferred embodiment is the pouring of the melting core 15 into the jacket parts 12, 13 through one of the internal thread openings.
  • the melting core 15 loses its mechanical strength when a permanent fire occurs, the melting element 12, 13, 15 can no longer hold the protective hood 7 against the force of the spring 9 in the closed position, so that the protective hood 7 moves into the open position shown in FIG jumps.
  • the gas flowing out of the pipeline 2 can now burn freely above the flame arrestor 5, the flame arrestor preventing the ignition from penetrating into the pipeline 2 due to its cooling function towards the inside of the pipeline 2.
  • FIG. 4 illustrates the structure of an advantageous embodiment of a fusible element, in which the two jacket parts 12, 13 tapered inner spaces 17, 13 to their connecting surface 16. 18 which are filled in by the cast-in melting core 15. This shape enables a tensile connection of the two jacket parts 12, 13 to one another even with mechanically not so stable material.
  • jacket parts 12 ', 13' A likewise suitable shaping of jacket parts 12 ', 13' is shown in Figure 5.
  • the jacket parts 12 ', 13' have approximately cylindrical inner spaces 17 ', 18', which are provided with radial grooves 19 which are filled by the cast-in melting core 15 ', so that the melting core 15' has corresponding radial ribs.
  • the upper jacket part 13' has a bolt 20 projecting from the connecting surface 16 ', which in a corresponding Bore of the jacket part 12 'engages and prevents rotation against rotation about the central axis 21 of the melting element.
  • Both the jacket part 12 and the jacket part 12 ' are formed on the outside as a hexagon and also act as a nut for the screw 11 for holding the frame 4 together for the flame arrestor 5.
  • the upper jacket part 13' is preferably round on the outside to a mistaken approach Prevent tool while simultaneously actuating the external hexagon of the jacket part 12, 12 ', whereby the melting core 15, 15' could be destroyed.
  • a chemically resistant sealant is preferably introduced to prevent the penetration of corrosive agents to the fusible core 15, 15'.
  • the jacket parts 12, 12 'and 13, 13' are preferably formed from a heat-conducting metal, for which stainless steel in particular is suitable.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fuses (AREA)
  • Insulated Conductors (AREA)
  • Glass Compositions (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Hinges (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Gas Burners (AREA)
  • Safety Valves (AREA)

Abstract

In a flame-trap fixture which is proof against slow combustion, having a protective cap (7) arranged above the flame trap (5), which cap can swing open and is secured in the closed position by a melting element (12, 13, 15; 12', 13', 15') and swings open when the melting element loses its mechanical strength on the occurrence of slow combustion, a mechanically strong, corrosion-resistant and fast- responding melting element can be produced if the melting element has an external two-part shell (12, 13; 12', 13') of heat-conducting, stable material, the two shell parts (12, 13; 12', 13') thereof being held together by a fusion core (15, 15') which is connected to the two shell parts (12, 13; 12', 13') by positive fitting. <IMAGE>

Description

Die Erfindung betrifft eine dauerbrandsichere Flammensperren­armatur mit einer oberhalb der Flammensperre angeordneten auf­klappbaren Schutzhaube, die in der geschlossenen Stellung durch ein Schmelzelement gehalten wird und aufklappt, wenn das Schmelz­element beim Auftreten eines Dauerbrandes seine Stabilität ver­liert.The invention relates to a permanently fire-resistant flame arrester fitting with a hinged protective hood arranged above the flame arrester, which is held in the closed position by a melting element and opens when the melting element loses its stability when a permanent fire occurs.

Derartige Flammsperrenarmaturen sind seit langem bekannt (vgl. z. B. DE 949 100). Die am Ende einer zu schützenden Öffnung installierten Flammensperrenarmaturen müssen aufgrund der Flam­mensperre eine Zünddurchschlagsicherheit gegen atmosphärische Explosionen sowie einem lang anhaltendem Abbrand (Dauerbrand) gewährleisten. Die Schutzhaube schützt die Flammensperre vor einem Eindringen von Regen und Schnee bzw. Schmutzpartikeln aus der Atmosphäre, die die Funktion der Flammensperre, nämlich die Fort­pflanzung einer Entzündung in das Innere des geschützten Behälters bzw. der geschützten Rohrleitung, beeinträchtigen könnten. Kommt es an der Außenseite der Flammensperre zu einer Entzündung von ausströmenden Produkt-Dampf- bzw. Gas/Luft-Gemischen, muß die Schutzhaube entfernt werden, damit es nicht durch Wärmereflexion zu einer Aufheizung der Flammensperre auf Zündtemperatur kommt. Durch das Schmelzen des Schmelzelementes wird die Schutzhaube nicht mehr in der geschlossenen Stellung gehalten, sondern klappt aufgrund einer entsprechenden Gewichtsverteilung oder aufgrund von Federkräften auf bzw. ab. Die Schmelzelemente müssen, um ein zu großes Aufheizen der Flammensperren zu verhindern, relativ schnell ansprechen. Darüber hinaus müssen sie eine ausreichende mecha­nische Festigkeit und, insbesondere bei einem Einsatz der Geräte in chemischen Anlagen, auch eine gute Korrosionsbeständigkeit aufweisen.Such flame arrester fittings have been known for a long time (see, for example, DE 949 100). The flame arrester armatures installed at the end of an opening to be protected must ensure, due to the flame arrester, protection against ignition failure against atmospheric explosions as well as long-lasting burn-up (permanent fire). The protective hood protects the flame arrester from the ingress of rain and snow or dirt particles from the atmosphere, which could impair the function of the flame arrester, namely the propagation of ignition into the interior of the protected container or the protected pipeline. If there is an ignition of escaping product-vapor or gas / air mixtures on the outside of the flame arrester, the Protective hood must be removed so that the flame arrester does not heat up to ignition temperature due to heat reflection. As a result of the melting of the melting element, the protective hood is no longer held in the closed position, but instead folds up or down due to a corresponding weight distribution or due to spring forces. In order to prevent the flame arresters from heating up too much, the melting elements must respond relatively quickly. In addition, they must have sufficient mechanical strength and, particularly when the devices are used in chemical plants, also good corrosion resistance.

Bekannte Schmelzelemente sind Haltebolzen bzw. Verschraubungen aus einem leicht abbrennbaren Kunststoff (z. B. leicht abbrennbares Acrylglas) oder aus einem leicht schmelzbaren Metall (z. B. eine Blei-Zink-Legierung). Den verwendeten Kunststoffen fehlt es bei einer ausreichenden mechanischen Festigkeit an einer ausreichen­den Korrosionsbeständigkeit, während die leicht schmelzbaren Metalle bei relativ guter Korrosionsbeständigkeit eine mangel­hafte Festigkeit aufweisen.Known melting elements are holding bolts or screw connections made of an easily burnable plastic (e.g. easily burnable acrylic glass) or of an easily meltable metal (e.g. a lead-zinc alloy). The plastics used lack sufficient corrosion resistance with sufficient mechanical strength, while the easily fusible metals have inadequate strength with relatively good corrosion resistance.

Der Erfindung liegt die Aufgabe zugrunde, eine dauerbrandsichere Flammensperrenarmatur der eingangs erwähnten Art mit einem Schmelzelement zu versehen, das eine gute Korrosionsbeständigkeit bei ausreichender mechanischer Festigkeit aufweist.The invention has for its object to provide a flame-retardant valve of the type mentioned at the outset with a melting element which has good corrosion resistance with sufficient mechanical strength.

Diese Aufgabe wird bei einer dauerbrandsicheren Flammensperren­armatur der eingangs erwähnten Art dadurch gelöst, daß das Schmelzelement einen äußeren, zweiteiligen Mantel aus wärme­leitendem, stabilem Material aufweist, dessen beide Mantelteile durch einen Schmelzkern zusammengehalten werden, der form­schlüssig mit den beiden Mantelteilen verbunden ist.This object is achieved in a permanently fire-resistant flame arrester fitting of the type mentioned at the outset in that the melting element has an outer, two-part jacket made of thermally conductive, stable material, the two jacket parts of which are held together by a melting core which is positively connected to the two jacket parts.

Bei dem in der erfindungsgemäßen Flammensperrenarmatur verwen­deten Schmelzelement sind die verschiedenen Funktionen auf ver­schiedene Teile des Schmelzelementes aufgeteilt worden. Die Korrosionsbeständigkeit wird durch den den Schmelzkern dicht umgebenden Mantel ebenso gewährleistet, wie die mechanische Stabilität, beispielsweise von Verschraubungen, die sich an dem stabilen Material des Mantels problemlos anbringen lassen. Die Schmelzfunktion, also das Öffnen der Schutzhaube bei einem Dauerbrand wird von dem Schmelzkern ausgeübt, der die beiden Mantelteile aufgrund eines Formschlusses zusammenhält, so daß sich die beiden Mantelteile beim Schmelzen des Schmelzkernes aufgrund eines Dauerbrandes voneinander lösen, wodurch die Schutzhaube ge­öffnet wird.In the melting element used in the flame arrester fitting according to the invention, the different functions have been divided up into different parts of the melting element. The Corrosion resistance is guaranteed by the sheath that surrounds the melting core as well as the mechanical stability, for example of screw connections, which can be easily attached to the stable material of the sheath. The melting function, i.e. the opening of the protective cover in the event of a permanent fire, is carried out by the melting core, which holds the two jacket parts together due to a positive fit, so that the two jacket parts separate from one another during the melting of the melting core due to a permanent fire, whereby the protective hood is opened.

In einer besonders bevorzugten Ausführungsform wird der Schmelz­kern, der vorzugsweise durch ein niedrig schmelzendes Metall ge­bildet ist, in die aneinandergepaßten Mantelteile durch eine Öffnung im aufgeheizten Zustand eingegossen. Dadurch lassen sich beliebig geeignete Formen für den Formschluss zwischen Schmelz­kern und Mantelteilen realisieren, die für die Stabilität der Verbindung von Schmelzkern und Mantelteilen maßgebend sind. So können die Mantelteile einen konisch zu ihrer Stoßfläche ver­jüngten Innenraum aufweisen, der durch den Schmelzkern ausgefüllt wird. In einer alternativen Ausführungsform weisen die Mantel­teile zylindrische Innenräume mit radialen Verankerungsnuten auf.In a particularly preferred embodiment, the melting core, which is preferably formed by a low-melting metal, is poured into the mating shell parts through an opening in the heated state. As a result, any suitable shapes for the interlocking between the melt core and the jacket parts can be realized, which are decisive for the stability of the connection between the melt core and the jacket parts. For example, the jacket parts can have an inner space that tapers conically to their abutting surface and is filled by the melting core. In an alternative embodiment, the jacket parts have cylindrical interior spaces with radial anchoring grooves.

Die Öffnung zum Eingießen des Schmelzkernes weist vorzugsweise ein Innengewinde auf, mit dem das entsprechende Mantelteil an der Schutzhaube oder an einem ortsfesten Gehäuseteil der Armatur ange­schraubt ist, so daß die Öffnung durch die Verschraubung wieder verschlossen ist.The opening for pouring the fusible core preferably has an internal thread with which the corresponding jacket part is screwed to the protective hood or to a stationary housing part of the fitting, so that the opening is closed again by the screw connection.

Vorzugsweise weisen beide Metallteile derartige Innengewinde auf, die zur Vermeidung von Fehlmontage vorzugsweise mit unterschied­lichen Durchmessern ausgebildet sind. Das Material des Mantels ist vorzugsweise ein festes, korrosionsbeständiges Metall, vorzugs­weise Edelstahl.Both metal parts preferably have such internal threads, which are preferably designed with different diameters to avoid incorrect assembly. The material of the jacket is preferably a solid, corrosion-resistant metal, preferably stainless steel.

Die Trennflächen der beiden Mantelteile werden durch die zum Öffnen der Schutzhauben neigende Kraft vorzugsweise auf Zug be­lastet. Dabei können die Trennflächen eine Verdrehsicherung gegen Verdrehen um eine in Zugrichtung liegende Drehachse aufweisen, wodurch bei axialen Innengewinden an den Mantelteilen beim Ein­schrauben der Befestigungsschrauben eine auf den Schmelzkern wirkende Torsionskraft vermieden wird.The parting surfaces of the two shell parts are by the Opening the protective hood tending force preferably loaded on train. The separating surfaces can have an anti-rotation device to prevent rotation about an axis of rotation lying in the pulling direction, as a result of which, in the case of axial internal threads on the jacket parts, when the fastening screws are screwed in, a torsional force acting on the melting core is avoided.

In einer bevorzugten Ausführungsform ist das eine Mantelteil mit einem Außensechskant und das andere Mantelteil außen rund ausge­bildet. Wenn dann das Schmelzelement zentrisch auf der Flammen­sperre angeordnet wird, kann das Mantelteil mit dem Außensechs­kant zugleich eine Halterung für einen die Flammensperren halten­den Rahmen bilden. In das außen runde Mantelteil kann eine die Schutzhaube haltende Flügelschraube eingeschraubt werden.In a preferred embodiment, the one jacket part is formed with an external hexagon and the other jacket part is round on the outside. If the melting element is then arranged centrally on the flame arrester, the casing part with the external hexagon can simultaneously form a holder for a frame holding the flame arresters. A wing screw holding the protective hood can be screwed into the outer round jacket part.

Um eine Restkorrosionsgefahr durch zum Schmelzkern über die Ver­bindungsflächen vordringende Agenzien zu verringern, kann zwischen die Trennflächen der Mantelteile eine chemikalienbeständige Dich­tungsmasse eingebracht sein. Eine derartige Dichtungsmasse kann auch die Innengewinde der Mantelteile abdichten.In order to reduce the risk of residual corrosion due to agents penetrating to the melt core via the connecting surfaces, a chemical-resistant sealing compound can be introduced between the separating surfaces of the jacket parts. Such a sealing compound can also seal the internal thread of the jacket parts.

Die Erfindung soll im folgenden anhand von in der Zeichnung darge­stellten Ausführungsbeispielen näher erläutert werden. Es zeigen:

  • Figur 1 - eine dauerbrandsichere Armatur mit geschlossener Schutzkappe
  • Figur 2 - ein Detail A aus Figur 1
  • Figur 3 - die Armatur aus Figur 1 mit aufgeklappter Schutz­haube nach Auftreten eines Dauerbrandes
  • Figur 4 - ein Schmelzelement in teilweise geschnittener Dar­stellung
  • Figur 5 - ein weiteres Schmelzelement in teilweise ge­schnittener Darstellung.
The invention will be explained in more detail below with reference to exemplary embodiments shown in the drawing. Show it:
  • Figure 1 - a permanently fire-proof fitting with a closed protective cap
  • Figure 2 - a detail A from Figure 1
  • Figure 3 - the armature of Figure 1 with the protective hood open after the occurrence of a permanent fire
  • Figure 4 - a melting element in a partially sectioned representation
  • Figure 5 - another melting element in a partially sectioned representation.

Die Figuren 1 bis 3 zeigen eine dauerbrandsichere Flammensperren­armatur 1, die in üblicher Weise an das Ende einer Rohrleitung 2 angeflanscht ist. Die Flammensperrenarmatur 1 weist ein konisch den Rohrquerschnitt der Rohrleitung 2 erweiterndes Gehäuseteil 3 auf, das an seinem erweiterten Ende einen Rahmen 4 für eine an sich bekannte Flammensperre 5 trägt. Die Flammensperre 5 ist in den aufgeklappten Rahmen 4 einlegbar, woraufhin der Rahmen 4 mittels eines Bolzens 6 geschlossen wird. Die so montierte Flammensperre 5 wird von einer Schutzhaube 7 überdeckt, die an einem an dem Gehäuseteil 3 angesetzten Drehgelenk 8 in die in Figur 3 dargestellte Position aufklappbar ist. Die Schutzhaube 7 steht in dem in Figur 1 dargestellten geschlossenen Zustand unter einer zum Aufklappen neigenden Vorspannung, die in dem dargestell­ten Ausführungsbeispiel durch eine Feder 9 am Drehgelenk 8 erzeugt wird. Gegen diese Vorspannung wird die Schutzhaube 7 im geschlossenen, d. h. die Flammensperre 5 abdeckenden Zustand durch eine Verschraubung 10 gehalten, die durch den Mittelpunkt der Flammensperre 5 und der Schutzhaube 7 hindurch verläuft. Die Ver­schraubung besteht aus einer durch eine zentrale Öffnung des Rahmens 4 und der Flammensperre 5 hindurch ragenden Schraube 11, die vom rohrleitungsseitigen Ende des Rahmens 4 eingesteckt ist. Das Gewindeende der Schraube 11 ragt in eine Innengewinde eines ersten Mantelteils 12, das mit einem zweiten Mantelteil 13 zusammengehalten wird. In ein nach oben offenes axiales Innen­gewinde des zweiten Mantelteils 13 greift eine Flügelschraube 14, die durch eine zentrale Öffnung der Schutzhaube 7 hindurchgesteckt ist.Figures 1 to 3 show a permanently fire-resistant flame arrester fitting 1, which is flanged to the end of a pipeline 2 in a conventional manner. The flame arrester fitting 1 has a housing part 3 which conically widens the pipe cross section of the pipeline 2 and which carries at its extended end a frame 4 for a flame arrester 5 known per se. The flame arrester 5 can be inserted into the opened frame 4, whereupon the frame 4 is closed by means of a bolt 6. The flame arrestor 5 assembled in this way is covered by a protective hood 7, which can be swung open into the position shown in FIG. 3 on a swivel joint 8 attached to the housing part 3. In the closed state shown in FIG. 1, the protective hood 7 is under a pretension that tends to open, which in the exemplary embodiment shown is generated by a spring 9 on the swivel joint 8. Against this bias, the protective hood 7 is held in the closed state, ie covering the flame arrester 5, by means of a screw connection 10 which runs through the center of the flame arrester 5 and the protective hood 7. The screw connection consists of a screw 11 projecting through a central opening in the frame 4 and the flame arrester 5, which is inserted from the pipe-side end of the frame 4. The threaded end of the screw 11 projects into an internal thread of a first jacket part 12, which is held together with a second jacket part 13. A wing screw 14, which is inserted through a central opening of the protective hood 7, engages in an upwardly open axial internal thread of the second jacket part 13.

Figur 2 verdeutlicht, daß der Zusammenhalt der beiden Mantelteile 12, 13 durch einen Schmelzkern 15 bewirkt wird, der die beiden Mantelteile 12, 13 durch Formschluß zusammenhält. Der Schmelz­kern 15 wird vorzugsweise aus einem niedrig schmelzenden Metall gebildet, das in die zusammengesteckten Mantelteile 12, 13 eingegossen wird. Das Schmelzelement kann jedoch auch aus anderen gießbaren schmelzenden Materialien gebildet sein, die eine aus­reichende mechanische Stabilität aufweisen. Es ist auch möglich, den Formschluß zwischen Schmelzkern 15 und den Mantelteilen 12, 13 in anderer Weise als durch Eingießen des verflüssigten Schmelzkernes 15 herzustellen, beispielsweise durch eine Führung nach Art eines Bajonetverschlusses. Die bevorzugte Ausführungs­form ist jedoch das Eingießen des Schmelzkernes 15 in die Mantelteile 12, 13 durch eine der Innengewindeöffnungen hindurch.FIG. 2 illustrates that the cohesion of the two jacket parts 12, 13 is brought about by a fusible core 15 which holds the two jacket parts 12, 13 together by positive locking. The fusible core 15 is preferably formed from a low-melting metal which is poured into the mated shell parts 12, 13. However, the melting element can also be formed from other castable melting materials that have sufficient mechanical stability. It is also possible to produce the positive connection between the melt core 15 and the jacket parts 12, 13 in a manner other than by pouring the liquefied melt core 15, for example by a guide in the manner of a bayonet lock. However, the preferred embodiment is the pouring of the melting core 15 into the jacket parts 12, 13 through one of the internal thread openings.

Verliert beim Auftreten eines Dauerbrandes der Schmelzkern 15 seine mechanische Festigkeit, kann das Schmelzelement 12, 13, 15 die Schutzhaube 7 nicht mehr gegen die Kraft der Feder 9 in der geschlossenen Stellung halten, so daß die Schutzhaube 7 in die in Figur 3 dargestellte geöffnete Stellung springt. Das aus der Rohr­leitung 2 ausströmende Gas kann nun oberhalb der Flammensperre 5 frei abbrennen, wobei die Flammensperre aufgrund ihrer abkühlen­den Funktion zum Innern der Rohrleitung 2 hin einen Durchtritt der Entzündung in die Rohrleitung 2 verhindert.If the melting core 15 loses its mechanical strength when a permanent fire occurs, the melting element 12, 13, 15 can no longer hold the protective hood 7 against the force of the spring 9 in the closed position, so that the protective hood 7 moves into the open position shown in FIG jumps. The gas flowing out of the pipeline 2 can now burn freely above the flame arrestor 5, the flame arrestor preventing the ignition from penetrating into the pipeline 2 due to its cooling function towards the inside of the pipeline 2.

Figur 4 verdeutlicht den Aufbau einer vorteilhaften Ausführungs­form eines Schmelzelementes, bei dem die beiden Mantelteile 12, 13 konisch zu ihrer Verbindungsfläche 16 verjüngte Innenräume 17, 18 aufweisen, die durch den eingegossenen Schmelzkern 15 ausge­füllt sind. Diese Formgebung ermöglicht auch bei mechanisch nicht so stabilem Material eine zugfeste Verbindung der beiden Mantel­teile 12, 13 miteinander.FIG. 4 illustrates the structure of an advantageous embodiment of a fusible element, in which the two jacket parts 12, 13 tapered inner spaces 17, 13 to their connecting surface 16. 18 which are filled in by the cast-in melting core 15. This shape enables a tensile connection of the two jacket parts 12, 13 to one another even with mechanically not so stable material.

Eine ebenfalls geeignete Formgebung von Mantelteilen 12′, 13′, ist in Figur 5 dargestellt. Die Mantelteile 12′, 13′ weisen etwa zylindrische Innenräume 17′, 18′ auf, die mit radialen Nuten 19 versehen sind, die von dem eingegossenen Schmelzkern 15′ ausge­füllt werden, so daß der Schmelzkern 15′ entsprechende radiale Rippen aufweist.A likewise suitable shaping of jacket parts 12 ', 13' is shown in Figure 5. The jacket parts 12 ', 13' have approximately cylindrical inner spaces 17 ', 18', which are provided with radial grooves 19 which are filled by the cast-in melting core 15 ', so that the melting core 15' has corresponding radial ribs.

Um den Schmelzkern 15′ vor einer Torsionsbelastung beim Einschrau­ben der Schraube 11 bzw. Flügelschraube 14 in das Mantelteil 12′ bzw. 13′ zu schützen, weist das obere Mantelteil 13′ einen aus der Verbindungsfläche 16′ hervorstehenden Bolzen 20 auf, der in eine entsprechende Bohrung des Mantelteils 12′ eingreift und eine Verdrehsicherung gegenüber einer Drehung um die Mittelachse 21 des Schmelzelements verhindert.In order to protect the fusible core 15 'from a torsional load when screwing in the screw 11 or wing screw 14 into the jacket part 12' or 13 ', the upper jacket part 13' has a bolt 20 projecting from the connecting surface 16 ', which in a corresponding Bore of the jacket part 12 'engages and prevents rotation against rotation about the central axis 21 of the melting element.

Sowohl das Mantelteil 12 als auch das Mantelteil 12′ sind außen als Sechskant ausgebildet und fungieren zugleich als Mutter für die Schraube 11 zum Zusammenhalten des Rahmens 4 für die Flammen­sperre 5. Das obere Mantelteil 13′ ist außen vorzugsweise rund ausgebildet, um einen irrtümlichen Ansatz eines Werkzeuges bei gleichzeitiger Betätigung des Außensechskants des Mantelteils 12, 12′ zu verhindern, wodurch der Schmelzkern 15, 15′ zerstört werden könnte.Both the jacket part 12 and the jacket part 12 'are formed on the outside as a hexagon and also act as a nut for the screw 11 for holding the frame 4 together for the flame arrestor 5. The upper jacket part 13' is preferably round on the outside to a mistaken approach Prevent tool while simultaneously actuating the external hexagon of the jacket part 12, 12 ', whereby the melting core 15, 15' could be destroyed.

In die Verbindungsfläche 16, 16′ ist vorzugsweise ein chemisch beständiges Dichtmittel eingebracht, um das Eindringen von korrodierenden Agenzien zum Schmelzkern 15, 15′ zu verhindern.In the connecting surface 16, 16 ', a chemically resistant sealant is preferably introduced to prevent the penetration of corrosive agents to the fusible core 15, 15'.

Die Mantelteil 12, 12′ bzw. 13, 13′ sind vorzugsweise aus einem wärmeleitenden Metall gebildet, wofür insbesondere Edelstahl in Frage kommt.The jacket parts 12, 12 'and 13, 13' are preferably formed from a heat-conducting metal, for which stainless steel in particular is suitable.

Claims (16)

1. Dauerbrandsichere Flammensperrenarmatur mit einer oberhalb der Flammensperre (5) angeordneten aufklappbaren Schutz­haube (7), die in der geschlossenen Stellung durch ein Schmelzelement (12, 13, 15; 12′, 13′, 15′) gehalten wird und aufklappt, wenn das Schmelzelement beim Auftreten eines Dauerbrandes seine mechanische Stablität verliert, dadurch gekennzeichnet, daß das Schmelzelement einen äußeren zwei­teiligen Mantel (12, 13; 12′, 13′) aus wärmeleitendem, stabilem Material aufweist, dessen beide Mantelteile (12, 13; 12′, 13′) durch einen Schmelzkern (15, 15′) zusammengehalten werden, der formschlüssig mit den beiden Mantelteilen (12, 13; 12′, 13′) verbunden ist.1. Permanently fire-resistant flame arrester fitting with a hinged protective hood (7) arranged above the flame arrester (5), which is held in the closed position by a melting element (12, 13, 15; 12 ', 13', 15 ') and opens when that Melting element loses its mechanical stability when a permanent fire occurs, characterized in that the melting element has an outer two-part jacket (12, 13; 12 ′, 13 ′) made of thermally conductive, stable material, the two jacket parts (12, 13; 12 ′, 13 ') Are held together by a fusible core (15, 15') which is positively connected to the two jacket parts (12, 13; 12 ', 13'). 2. Flammensperrenarmatur nach Anspruch 1, dadurch gekennzeich­net, daß der Schmelzkern (15, 15′) in die aneinandergepaßten Mantelteile (12, 13; 12′, 13′) durch eine Öffnung im aufge­heizten Zustand eingegossen worden ist.2. Flame barrier fitting according to claim 1, characterized in that the melting core (15, 15 ') in the mating jacket parts (12, 13; 12', 13 ') has been poured through an opening in the heated state. 3. Flammensperrenarmatur nach Anspruch 1 oder 2, dadurch gekenn­ zeichnet, daß der Schmelzkern durch ein niedrig schmelzendes Metall gebildet ist.3. flame arrester fitting according to claim 1 or 2, characterized records that the melting core is formed by a low melting metal. 4. Flammensperrenarmatur nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Material des Mantels (12, 13; 12′, 13′) festes, korrosionsbeständiges Metall ist.4. flame arrester fitting according to one of claims 1 to 3, characterized in that the material of the casing (12, 13; 12 ', 13') is solid, corrosion-resistant metal. 5. Flammensperrenarmatur nach Anspruch 4, dadurch gekennzeich­net, daß das Metall Edelstahl ist.5. flame arrester fitting according to claim 4, characterized in that the metal is stainless steel. 6. Flammensperrenarmatur nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Öffnung zum Eingießen des Schmelzkerns (15, 15′) ein Innengewinde aufweist.6. flame arrester fitting according to one of claims 2 to 5, characterized in that the opening for pouring the melting core (15, 15 ') has an internal thread. 7. Flammensperrenarmatur nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß beide Mantelteile (12, 13; 12′, 13′) ein axiales Innengewinde aufweisen.7. flame arrester fitting according to one of claims 1 to 6, characterized in that both jacket parts (12, 13; 12 ', 13') have an axial internal thread. 8. Flammensperrenarmatur nach Anspruch 7, dadurch gekennzeich­net, daß die beiden Innengewinde mit unterschiedlichen Durch­messern ausgeführt sind.8. flame arrester fitting according to claim 7, characterized in that the two internal threads are designed with different diameters. 9. Flammensperrenarmatur nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß die Mantelteile (12, 13) einen konisch zu ihrer Stoßfläche (16) verjüngten Innenraum (17, 18) aufweisen, der durch den Schmelzkern (15) ausgefüllt ist.9. flame arrester fitting according to one of claims 2 to 8, characterized in that the jacket parts (12, 13) have a conical to their abutment surface (16) tapered interior (17, 18) which is filled by the melting core (15). 10. Flammensperrenarmatur nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß die Mantelteile (12′, 13′) zylindrische Innenräume (17′, 18′) mit radialen Verankerungs­nuten (19) aufweisen, die durch den Schmelzkern (15′) aus­gefüllt sind.10. flame arrester fitting according to one of claims 2 to 8, characterized in that the jacket parts (12 ', 13') cylindrical inner spaces (17 ', 18') with radial anchoring grooves (19) which are filled by the melting core (15 ') are. 11. Flammensperrenarmatur nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Mantelteile (12, 13; 12′, 13′) durch die Schutzhaube (7) auf Zug belastete Trennflächen (16, 16′) aufweisen.11. Flame arrester fitting according to one of claims 1 to 10, characterized in that the jacket parts (12, 13; 12 ', 13') through the protective hood (7) stressed separating surfaces (16, 16 ') have. 12. Flammensperrenarmatur nach einem Anspruch 11, dadurch gekenn­zeichnet, daß die Trennflächen (16′) eine Verdrehsicherung (20) gegen Verdrehen um eine in Zugrichtung liegende Dreh­achse (21) aufweisen.12. flame arrester fitting according to claim 11, characterized in that the separating surfaces (16 ') have an anti-rotation device (20) against rotation about an axis of rotation lying in the pulling direction (21). 13. Flammensperrenarmatur nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß das eine Mantelteil (12, 12′) mit einem Außensechskant und das andere Mantelteil (13, 13′) außen rund ausgebildet ist.13. Flame arrester fitting according to one of claims 1 to 12, characterized in that the one jacket part (12, 12 ') with an external hexagon and the other jacket part (13, 13') is round on the outside. 14. Flammensperrenarmatur nach einem der Ansprüche 1 bis 13, da­durch gekennzeichnet, daß das Schmelzelement (12, 13, 15; 12′, 13′, 15′) zentrisch auf der Flammensperre (5) angeordnet ist.14. Flame arrester fitting according to one of claims 1 to 13, characterized in that the melting element (12, 13, 15; 12 ', 13', 15 ') is arranged centrally on the flame arrester (5). 15. Flammensperrenarmatur nach Anspruch 13 und 14, dadurch gekennzeichnet, daß das Mantelteil (12, 12′) mit dem Außen­sechskant zugleich eine Halterung für einen die Flammensperre (5) haltenden Rahmen (4) bildet.15. Flame arrester fitting according to claim 13 and 14, characterized in that the casing part (12, 12 ') with the external hexagon also forms a holder for a flame arrester (5) holding frame (4). 16. Flammensperrenarmatur nach einem der Ansprüche 1 bis 15, da­durch gekennzeichnet, daß zwischen die Trennflächen (16, 16′) der Mantelteile (12, 13; 12′, 13′) eine chemikalienbeständige Dichtungsmasse eingebracht ist.16. Flame arrester fitting according to one of claims 1 to 15, characterized in that between the parting surfaces (16, 16 ') of the jacket parts (12, 13; 12', 13 ') a chemical-resistant sealant is introduced.
EP88120693A 1988-02-25 1988-12-10 Flametrap with extensive heat exposure resistance Expired - Lifetime EP0333924B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88120693T ATE72761T1 (en) 1988-02-25 1988-12-10 CONTINUOUSLY FIRE PROOF FLAME BARRIER FITTING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3805845 1988-02-25
DE3805845A DE3805845C1 (en) 1988-02-25 1988-02-25

Publications (3)

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EP0333924A2 true EP0333924A2 (en) 1989-09-27
EP0333924A3 EP0333924A3 (en) 1990-03-28
EP0333924B1 EP0333924B1 (en) 1992-02-26

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EP88120693A Expired - Lifetime EP0333924B1 (en) 1988-02-25 1988-12-10 Flametrap with extensive heat exposure resistance

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EP (1) EP0333924B1 (en)
AT (1) ATE72761T1 (en)
DE (2) DE3805845C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104841076A (en) * 2015-06-02 2015-08-19 精凯(天津)阀门制造有限公司 Pipe end flame arrester

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR569764A (en) * 1923-08-14 1924-04-17 Device for automatic control of aircraft and other fire extinguishers
US1953582A (en) * 1933-09-13 1934-04-03 William L Belknap Heat responsive link
GB419116A (en) * 1933-10-09 1934-11-06 Francis Sales Woidich Improvements in and relating to fire-protecting apparatus for storage tanks
GB803862A (en) * 1955-04-07 1958-11-05 Lindley Ltd H A fusible link
DE2534525A1 (en) * 1975-07-31 1977-02-03 Sening Fa F A Flame screen for inflammable materials tanker vehicle - has edges cast directly into wall of housing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949100C (en) * 1955-01-27 1956-09-13 Robert Leinemann With a flame arrester to protect against the impact of flames and explosions, respiratory system for fuel storage containers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR569764A (en) * 1923-08-14 1924-04-17 Device for automatic control of aircraft and other fire extinguishers
US1953582A (en) * 1933-09-13 1934-04-03 William L Belknap Heat responsive link
GB419116A (en) * 1933-10-09 1934-11-06 Francis Sales Woidich Improvements in and relating to fire-protecting apparatus for storage tanks
GB803862A (en) * 1955-04-07 1958-11-05 Lindley Ltd H A fusible link
DE2534525A1 (en) * 1975-07-31 1977-02-03 Sening Fa F A Flame screen for inflammable materials tanker vehicle - has edges cast directly into wall of housing

Also Published As

Publication number Publication date
EP0333924B1 (en) 1992-02-26
DE3805845C1 (en) 1989-06-01
EP0333924A3 (en) 1990-03-28
ATE72761T1 (en) 1992-03-15
DE3868626D1 (en) 1992-04-02

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