EP0424644A1 - Pressurized gas vessel having a safety device for arresting flash-backs - Google Patents

Pressurized gas vessel having a safety device for arresting flash-backs Download PDF

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Publication number
EP0424644A1
EP0424644A1 EP90116896A EP90116896A EP0424644A1 EP 0424644 A1 EP0424644 A1 EP 0424644A1 EP 90116896 A EP90116896 A EP 90116896A EP 90116896 A EP90116896 A EP 90116896A EP 0424644 A1 EP0424644 A1 EP 0424644A1
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EP
European Patent Office
Prior art keywords
baffle plate
valve
pressurized gas
gas container
safety device
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.)
Granted
Application number
EP90116896A
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German (de)
French (fr)
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EP0424644B1 (en
Inventor
Hans-Jürgen Dipl.-Ing. Sontag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
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Linde GmbH
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Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to AT90116896T priority Critical patent/ATE97474T1/en
Publication of EP0424644A1 publication Critical patent/EP0424644A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/06—Vessel construction using filling material in contact with the handled fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/018—Acetylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC

Definitions

  • the invention relates to pressurized gas containers with a porous filling compound soaked in a solvent and in which an explosive gas is contained in solution, a safety device being provided between a valve opening and the filling compound for discharging flashbacks.
  • the porous filling compound for example a monolithic block of calcium silicate compound, is impregnated with a solvent, for example acetone, in which, for example, acetylene is dissolved.
  • acetylene is a widely used welding gas. During welding, there may be flashbacks in the gas supply line that continue into the compressed gas tank. There, the acetylene ignites, which results in the decomposition of the gas, which is accompanied by the release of heat, which further increases the pressure and temperature.
  • the monolithic mass block is intended to limit the penetration of the flame beam and thus limit the heat release during gas ignition. So he has one against Flame retardant effect, which is further supported by the fact that, according to the safety regulations, free bottle volume per volume unit may only contain a certain amount of acetylene, for example 0.20 kg / l.
  • Such a pressure gas container is described in the form of an acetylene pressure gas bottle in DE-PS 510 486.
  • a bunch of resilient, fan-shaped metal strips are provided there to stop flashbacks, which are arranged in the gas bottle immediately below the valve opening and have the task of diverting the flame jet towards the heat-dissipating inner wall of the gas bottle in order to immediately extinguish the flames.
  • Disadvantages of this flame arrester are its complicated structure, which requires expensive and complex production, and the inconvenient and uncontrollable introduction of the device into the gas bottle.
  • the present invention is therefore based on the object of avoiding the disadvantages mentioned and of providing a pressurized gas container of the type mentioned at the outset which has an economically producible, simply constructed and reliably functioning safety device for discharging flashbacks.
  • the safety device consists of a baffle plate arranged perpendicular to the central valve opening axis and spaced from the inner wall of the compressed gas container.
  • a baffle plate is simple and inexpensive to manufacture and fulfills the purpose of diverting the flame jet entering the compressed gas container from the valve opening in the direction of the heat-dissipating metallic inner wall of the pressurized gas container and the likewise heat-dissipating metal mass of the valve.
  • the energy inherent in the flame beam is conducted outside through the metal.
  • the security device according to the invention further increases the security against flashback that is already present through the filling compound.
  • the baffle plate consists of a circular sheet steel plate, the diameter of which does not exceed the diameter of the bottle neck opening for the valve.
  • baffle plate The introduction of the baffle plate into the pressure gas container can be facilitated if the baffle plate is centrally penetrated by a wire pin, the two ends of which protrude beyond the baffle plate.
  • the end opposite the valve opening is pointed and is fixed in the filling compound.
  • the other end of the wire pin serves as an assembly aid.
  • the baffle plate is concavely curved toward the valve opening in order to effect a more targeted flame beam deflection.
  • the baffle plate is attached to the inside of the compressed gas container valve at a distance from it. This creates a combination of valve and safety device.
  • the safety device therefore does not need to be installed separately, but is installed together with the valve.
  • the baffle plate is formed by the bottom of a nipple screwed into the valve cone, which has an axial bore connected to the valve bore and radial bores in the area near the bottom is provided, which are connected to the axial bore.
  • the radial holes direct the flame jet towards the steel jacket of the compressed gas tank.
  • the nipple is preferably designed as a hexagon nipple, with a radial bore being made centrally in each hexagon flank. In this way, the flame beam is distributed very regularly over the circumference of the hexagon.
  • the compressed gas container is an acetylene compressed gas bottle, the steel jacket 1 of which is a monolithic mass block 2 made of a highly porous calcium silicate mass surrounds.
  • a valve opening 3 is provided in a bottle neck 4.
  • a commercially available valve 5 is fastened in the valve opening 3.
  • the bottle neck 4 is surrounded by a neck ring 6, which has a screw thread 7 for receiving a screw cap.
  • the mass block 2 is spaced from the inner surface of the steel jacket 1 at least in the upper region of the compressed gas bottle.
  • a circular baffle plate 8 is arranged perpendicular to the central axis, which lies in a recess 9 at the upper end of the mass block 2 in the figure and whose diameter does not exceed the diameter of the valve opening 3.
  • the baffle plate 8 is penetrated centrally by a pin 10 which projects beyond both sides of the baffle plate and whose longer end opposite the valve opening 3 is pointed and fixed in the mass block 2.
  • the pin 10, more precisely its end facing the valve opening 3, serves on the one hand as an assembly aid when introducing the baffle plate 8 into the bottle interior, and on the other hand the baffle plate 8 is fixed by the end of the pin 10 protruding into the mass block 2.
  • the baffle plate 8 consists of sheet steel. As shown in FIG. 3, it is possible to concave the baffle plate 8 towards the valve opening 3. Furthermore, there are also variants, as shown in FIGS. 4 and 5, in which the baffle plate 8 is attached directly to the underside of the valve 5 via webs 11 and is screwed together with the latter into the valve opening 3.
  • FIG. 6 shows a valve 5, into the valve cone 12 of which a nipple 13 designed as a hexagonal nipple is screwed.
  • the nipple 13 has an axial bore 14 which connects to the valve bore IS of the valve 5.
  • the end of the nipple 13 arranged outside the valve cone 12 is formed by a base 16 which closes the axial bore 1S and takes over the function of the baffle plate.
  • the flame jet is derived through radial bores 17 in the area of the nipple 13 near the bottom, which are connected to the axial bore 14.
  • the bores 16 are made centrally in the hexagonal surfaces of the nipple.
  • the mode of operation is as follows:
  • the flame jet penetrating the compressed gas bottle in the event of a flashback through the valve 5 and the valve opening 3 is reflected by the baffle plate to the inner surface of the steel jacket 1 and to the metal mass of the valve 5, where the flame energy is recorded and forwarded to the outside.
  • the safety of such a compressed gas bottle is thus considerably improved in a simple manner.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A pressurized gas vessel is filled with a porous solid block 2 which is impregnated with solvent in which an explosive gas is dissolved. A safety device for arresting flashbacks, which consists of a baffle plate 8 arranged beneath a valve opening 3, deflects the flame jet penetrating in the event of a flashback towards the inner surface of the heat-absorbing steel shell 1 and towards the heat-absorbing metal mass of the valve 5 and directs the energy of the flame to the outside. This prevents an explosion of the pressurized gas vessel. A pin 10 which passes centrally through the baffle plate 8, the diameter of which does not exceed the diameter of the cylinder-neck opening for the valve 3, serves as an assembly aid and serves to fix the baffle plate 8 on the solid block 2. <IMAGE>

Description

Die Erfindung betrifft Druckgasbehälter mit einer darin befindlichen, von einem Lösungsmittel getränkten, porösen Füllmasse, in der ein explosibles Gas gelöst enthalten ist, wobei zwischen einer Ventilöffnung und der Füllmasse eine Sicherheitsvorrichtung zum Ableiten von Flammen­rückschlägen vorgesehen ist. Die poröse Füllmasse, beispielsweise ein monolithischer Masseblock aus Kalziumsilikatmasse, ist mit einem Lösungsmittel, z.B. Azeton, getränkt, in dem beispielsweise Acetylen gelöst ist. Acetylen ist ein viel verwendetes Schweißgas. Beim Schweißen kann es zu Flammenrückschlägen in die Gaszufuhrleitung kommen, die sich bis in den Druckgas­behälter fortsetzen. Dort kommt es dann zu einer Zündung des Acetylens, was eine Zersetzung des Gases zur Folge hat, die mit einer Freisetzung von Wärme einhergeht, wobei sich Druck und Temperatur weiter erhöhen. Dies führt meist zu einer Explosion des Druckgasbehälters. Der monolithische Masseblock soll ein Eindringen des Flammen­strahles begrenzen und damit die Wärmefreisetzung bei der Gaszündung beschränken. Er besitzt also eine gegen Flammenrückschläge sichernde Wirkung, die noch dadurch unterstützt wird, daß gemäß den sicherheitstechnischen Vorschriften pro Volumeneinheit freies Flaschenvolumen nur eine bestimmte Masse an Acetylenmenge vorhanden sein darf, beispielsweise 0,20 kg/l.The invention relates to pressurized gas containers with a porous filling compound soaked in a solvent and in which an explosive gas is contained in solution, a safety device being provided between a valve opening and the filling compound for discharging flashbacks. The porous filling compound, for example a monolithic block of calcium silicate compound, is impregnated with a solvent, for example acetone, in which, for example, acetylene is dissolved. Acetylene is a widely used welding gas. During welding, there may be flashbacks in the gas supply line that continue into the compressed gas tank. There, the acetylene ignites, which results in the decomposition of the gas, which is accompanied by the release of heat, which further increases the pressure and temperature. This usually leads to an explosion of the compressed gas container. The monolithic mass block is intended to limit the penetration of the flame beam and thus limit the heat release during gas ignition. So he has one against Flame retardant effect, which is further supported by the fact that, according to the safety regulations, free bottle volume per volume unit may only contain a certain amount of acetylene, for example 0.20 kg / l.

Beim Hantieren mit derartigen Druckgasbehältern kann es durch mechanische Beanspruchungen, die äußerlich auf den Druckgasbehälter einwirken, zu Brüchen des monolithischen Masseblocks kommen, wodurch bei einem Flammenrückschlag der Flammenstrahl in Abhängigkeit seiner Intensität leichter und weiter in die Füllmasse eindringen kann und Zerstörungen in der Masse anrichtet sowie eine größere Gasmenge zur Zündung bringt, was eine Druckgasbehälter­explosion sehr wahrscheinlich macht. Die sichernde Wirkung der porösen Füllmasse wird also vermindert, wobei das Ausmaß der Sicherheitsminderung nicht vorhersehbar ist.When handling such pressurized gas containers, mechanical stresses that act externally on the pressurized gas container can cause the monolithic mass block to break, which means that if the flame flashes back, depending on its intensity, the flame jet can penetrate more easily and further into the filling compound and cause damage to the mass as well causes a larger amount of gas to ignite, which makes a compressed gas container explosion very likely. The protective effect of the porous filling compound is therefore reduced, the extent of the safety reduction being unpredictable.

Es hat daher bereits Vorschläge gegeben, zusätzliche Sicherheitseinrichtungen gegen Flammenrückschläge bei Druckgasbehältern vorzusehen. Ein derartiger Druckgas­behälter ist in Form einer Acetylen-Druckgasflasche in der DE-PS 510 486 beschrieben. Zum Aufhalten zurückschlagender Flammen ist dort ein Bündel federnder, fächerförmiger Metallstreifen vorgesehen, die in der Gasflasche unmittelbar unterhalb der Ventilöffnung angeordnet sind und die Aufgabe haben, den Flammenstrahl in Richtung zur wärmeableitenden Innenwandung der Gasflasche umzuleiten, um ein sofortiges Erlöschen der Flammen zu bewirken. Nachteilig an dieser Flammenableitungsvorrichtung ist deren komplizierter Aufbau, die eine teuere und aufwendige Herstellung bedingt, sowie das umständliche und nicht kontrollierbare Einbringen der Vorrichtung in die Gasflasche.There have therefore already been proposals to provide additional safety devices against flashbacks in compressed gas containers. Such a pressure gas container is described in the form of an acetylene pressure gas bottle in DE-PS 510 486. A bunch of resilient, fan-shaped metal strips are provided there to stop flashbacks, which are arranged in the gas bottle immediately below the valve opening and have the task of diverting the flame jet towards the heat-dissipating inner wall of the gas bottle in order to immediately extinguish the flames. Disadvantages of this flame arrester are its complicated structure, which requires expensive and complex production, and the inconvenient and uncontrollable introduction of the device into the gas bottle.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, die genannten Nachteile zu vermeiden und einen Druckgasbehälter der eingangs genannten Art zur Verfügung zu stellen, der eine wirtschaftlich herstellbare, einfach aufgebaute und zuverlässig funktionierende Sicherheits­vorrichtung zum Ableiten von Flammenrückschlägen aufweist.The present invention is therefore based on the object of avoiding the disadvantages mentioned and of providing a pressurized gas container of the type mentioned at the outset which has an economically producible, simply constructed and reliably functioning safety device for discharging flashbacks.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Sicherheitsvorrichtung aus einer senkrecht zur Ventil­öffnungs-Mittelachse angeordneten, von der Innenwandung des Druckgasbehälters beabstandeten Prallscheibe besteht. Eine derartige Prallscheibe ist einfach und billig herzu­stellen und erfüllt den Zweck, den aus der Ventilöffnung in den Druckgasbehälter eindringenden Flammenstrahl in Richtung zur wärmeableitenden metallischen Innenwandung des Druckgasbehälters und zur ebenfalls wärmeableitenden Metallmasse des Ventils hin umzuleiten. Die dem Flammen­strahl innenwohnende Energie wird über das Metall nach außen geleitet. Durch die erfindungsgemäße Sicherheits­vorrichtung wird die bereits durch die Füllmasse vorhandene Sicherheit gegen Flammenrückschlag weiter erhöht. Aus diesem Grund kann eine Anhebung der Beladung des Druckgasbehälters mit explosiblen Gas ins Auge gefaßt werden, wodurch der Behälter weniger oft befüllt werden muß. Beispielsweise kann bei kleineren Acetlyenflaschen mit einem geringeren Volumen als 20 l der deswegen auf 0,18 kg/l reduzierte Wert der Acetylenbeladung wieder auf den bei größeren Flaschen normalerweise üblichen Wert von 0,20 kg/l angehoben werden.This object is achieved in that the safety device consists of a baffle plate arranged perpendicular to the central valve opening axis and spaced from the inner wall of the compressed gas container. Such a baffle plate is simple and inexpensive to manufacture and fulfills the purpose of diverting the flame jet entering the compressed gas container from the valve opening in the direction of the heat-dissipating metallic inner wall of the pressurized gas container and the likewise heat-dissipating metal mass of the valve. The energy inherent in the flame beam is conducted outside through the metal. The security device according to the invention further increases the security against flashback that is already present through the filling compound. For this reason, an increase in the loading of the compressed gas container with explosive gas can be envisaged, as a result of which the container does not have to be filled as often. For example, in the case of smaller acetylene bottles with a smaller volume than 20 l, the value of the acetylene load, which is therefore reduced to 0.18 kg / l, can be raised again to the value of 0.20 kg / l, which is normally the case for larger bottles.

Es ist günstig, wenn die Prallscheibe aus einer kreisförmigen Stahlblechscheibe besteht, deren Durchmesser den Durchmesser der Flaschenhalsöffnung für das Ventil nicht überschreitet.It is advantageous if the baffle plate consists of a circular sheet steel plate, the diameter of which does not exceed the diameter of the bottle neck opening for the valve.

Dadurch können Druckbehälter, deren Füllmasse bereits beschädigt ist, nachträglich mit der erfindungsgemäßen Sicherheitsvorrichtung ausgerüstet werden. Das infolge der Beschädigung der Füllmasse abgesunkene Sicherheitsniveau kann somit ausgeglichen werden.As a result, pressure vessels whose filling mass is already damaged can be retrofitted with the safety device according to the invention. The safety level which has dropped as a result of the damage to the filling compound can thus be compensated for.

Das Einbringen der Prallscheibe in den Druckgasbehälter kann erleichtert werden, wenn die Prallscheibe zentrisch von einem Drahtstift durchsetzt ist, dessen beiden Enden über die prallscheibe hinausragen. Das der Ventilöffnung entgegengesetzte Ende ist angespitzt und wird in der Füllmasse fixiert. Das andere Ende des Drahtstifts dient als Montagehilfe.The introduction of the baffle plate into the pressure gas container can be facilitated if the baffle plate is centrally penetrated by a wire pin, the two ends of which protrude beyond the baffle plate. The end opposite the valve opening is pointed and is fixed in the filling compound. The other end of the wire pin serves as an assembly aid.

Gemäß einer Weiterbildung des Erfindungsgegenstandes ist die Prallscheibe zur Ventilöffnung hin konkav gewölbt, um eine gezielterte Flammenstrahlablenkung zu bewirken.According to a development of the subject matter of the invention, the baffle plate is concavely curved toward the valve opening in order to effect a more targeted flame beam deflection.

In einer vorteilhaften Ausgestaltung ist vorgesehen, daß die Prallscheibe an der Innenseite des Druckgasbehälter­ventiles mit Abstand zu diesem befestigt ist. Es entsteht dadurch eine Kombination aus Ventil und Sicherheits­vorrichtung. Die Sicherheitsvorrichtung braucht daher nicht getrennt eingebaut zu werden, sondern wird zusammen mit dem Ventil montiert.In an advantageous embodiment it is provided that the baffle plate is attached to the inside of the compressed gas container valve at a distance from it. This creates a combination of valve and safety device. The safety device therefore does not need to be installed separately, but is installed together with the valve.

Eine fertigungstechnisch sehr günstige Kombination aus Ventil und Sicherheitsvorrichtung ergibt sich dann, wenn gemäß einer günstigen Weiterbildung des Erfindungs­gedankens die Prallscheibe vom Boden eines in den Ventil­konus eingeschraubten Nippels gebildet wird, der eine mit der Ventilbohrung in Verbindung stehende Axialbohrung aufweist und im bodennahen Bereich mit radialen Bohrungen versehen ist, die an die Axialbohrung angeschlossen sind. Die radialen Bohrungen leiten den Flammenstrahl in Richtung zum Stahlmantel des Druckgasbehälters hin ab. Der Nippel ist vorzugsweise als Sechskantnippel ausgebildet, wobei in jede Sechskantflanke eine Radialbohrung zentral eingebracht ist. Auf diese Weise wird der Flammenstrahl sehr regelmäßig auf den Umfang des Sechskantes verteilt.A combination of valve and safety device that is very favorable in terms of production technology results when, according to a favorable further development of the inventive concept, the baffle plate is formed by the bottom of a nipple screwed into the valve cone, which has an axial bore connected to the valve bore and radial bores in the area near the bottom is provided, which are connected to the axial bore. The radial holes direct the flame jet towards the steel jacket of the compressed gas tank. The nipple is preferably designed as a hexagon nipple, with a radial bore being made centrally in each hexagon flank. In this way, the flame beam is distributed very regularly over the circumference of the hexagon.

Die Erfindung soll anhand der schematischen Figuren in mehreren Ausführungsbeispielen dargestellt werden.The invention is to be illustrated in several exemplary embodiments on the basis of the schematic figures.

Es zeigen:

  • Figur 1 einen Teilschnitt durch einen erfindungsgemäßen Druckgasbehälter
  • Figur 2 eine erfindungsgemäße Sicherheitsvorrichtung
  • Figur 3 eine zweite Ausführungsform der Sicherheits­vorrichtung
  • Figur 4 eine Kombination aus Ventil und Sicherheits­vorrichtung
  • Figur 5 eine Kombination aus Ventil und der abgeänderten Sicherheitsvorrichtung gemäß Figur 3.
  • Figur 6 eine Kombination aus Ventil und einer in einen Einschraubnippel integrierten Prallscheibe.
Show it:
  • 1 shows a partial section through a pressurized gas container according to the invention
  • Figure 2 shows a safety device according to the invention
  • Figure 3 shows a second embodiment of the safety device
  • Figure 4 shows a combination of valve and safety device
  • FIG. 5 shows a combination of valve and the modified safety device according to FIG. 3.
  • Figure 6 shows a combination of a valve and a baffle plate integrated in a screw-in nipple.

Der Druckgasbehälter sei in diesem Beispiel eine Acetylen-­Druckgasflasche, deren Stahlmantel 1 einen monolithischen Masseblock 2 aus einer hochporösen Kaliziumsilikatmasse umgibt. Am oberen Ende der Druckgasflasche ist eine Ventilöffnung 3 in einem Flaschenhals 4 vorgesehen. In der Ventilöffnung 3 ist ein handelsübliches Ventil 5 befestigt. Der Flaschenhals 4 ist von einem Halsring 6 umgeben, der ein Schraubgewinde 7 zur Aufnahme einer Schraubkappe aufweist.In this example, the compressed gas container is an acetylene compressed gas bottle, the steel jacket 1 of which is a monolithic mass block 2 made of a highly porous calcium silicate mass surrounds. At the upper end of the compressed gas bottle, a valve opening 3 is provided in a bottle neck 4. A commercially available valve 5 is fastened in the valve opening 3. The bottle neck 4 is surrounded by a neck ring 6, which has a screw thread 7 for receiving a screw cap.

Der Masseblock 2 ist zumindest im oberen Bereich der Druckgasflasche von der Innenoberfläche des Stahlmantels 1 beabstandet. In Verlängerung der Mittelachse der Ventil­öffnung 3 nach dem Flascheninneren hin ist senkrecht zur Mittelachse eine kreisförmige Prallscheibe 8 angeordnet, die in einer Ausnehmung 9 am in der Figur oberen Ende des Masseblocks 2 liegt und deren Durchmesser den Durchmesser der Ventilöffnung 3 nicht überschreitet. Die Prallscheibe 8 ist zentrisch von einem Stift 10 durchsetzt, der über beide Seiten der Prallscheibe hinausragt und dessen der Ventilöffnung 3 entgegengesetztes längeres Ende zugespitzt und in dem Masseblock 2 fixiert ist. Der Stift 10, genauer gesagt dessen der Ventilöffnung 3 zugewandtes Ende, dient einerseits als Montagehilfe beim Einbringen der Prall­scheibe 8 in das Flascheninnere, andererseits wird durch das in den Masseblock 2 hineinragende Ende des Stiftes 10 die Prallscheibe 8 fixiert. Die Prallscheibe 8 besteht aus Stahlblech. Wie in Figur 3 dargestellt, ist es möglich, die Prallscheibe 8 zur Ventilöffnung 3 hin konkav zu wölben. Weiterhin gibt es auch Varianten, wie in den Figuren 4 und 5 gezeigt, bei denen die prallscheibe 8 über Stege 11 direkt an der Unterseite des Ventiles 5 befestigt ist und zusammen mit diesem in die Ventilöffnung 3 eingeschraubt wird.The mass block 2 is spaced from the inner surface of the steel jacket 1 at least in the upper region of the compressed gas bottle. In the extension of the central axis of the valve opening 3 towards the inside of the bottle, a circular baffle plate 8 is arranged perpendicular to the central axis, which lies in a recess 9 at the upper end of the mass block 2 in the figure and whose diameter does not exceed the diameter of the valve opening 3. The baffle plate 8 is penetrated centrally by a pin 10 which projects beyond both sides of the baffle plate and whose longer end opposite the valve opening 3 is pointed and fixed in the mass block 2. The pin 10, more precisely its end facing the valve opening 3, serves on the one hand as an assembly aid when introducing the baffle plate 8 into the bottle interior, and on the other hand the baffle plate 8 is fixed by the end of the pin 10 protruding into the mass block 2. The baffle plate 8 consists of sheet steel. As shown in FIG. 3, it is possible to concave the baffle plate 8 towards the valve opening 3. Furthermore, there are also variants, as shown in FIGS. 4 and 5, in which the baffle plate 8 is attached directly to the underside of the valve 5 via webs 11 and is screwed together with the latter into the valve opening 3.

In Figur 6 ist ein Ventil 5 gezeigt, in dessen Ventilkonus 12 ein als Sechskantnippel ausgebildeter Nippel 13 einge­schraubt ist. Der Nippel 13 weist eine Axialbohrung 14 auf, die an die Ventilbohrung lS des Ventils 5 anschließt. Das außerhalb des Ventilkonus 12 angeordnete Ende des Nippels 13 wird von einem Boden 16 gebildet, der die Axial­bohrung 1S verschließt und die Funktion der Prallscheibe übernimmt. Die Ableitung des Flammenstrahls erfolgt durch radiale Bohrungen 17 im bodennahen Bereich des Nippels 13, die mit der Axialbohrung 14 in Verbindung stehen. Die Bohrungen 16 sind zentral in die Sechskantflächen des Nippels eingebracht.FIG. 6 shows a valve 5, into the valve cone 12 of which a nipple 13 designed as a hexagonal nipple is screwed. The nipple 13 has an axial bore 14 which connects to the valve bore IS of the valve 5. The end of the nipple 13 arranged outside the valve cone 12 is formed by a base 16 which closes the axial bore 1S and takes over the function of the baffle plate. The flame jet is derived through radial bores 17 in the area of the nipple 13 near the bottom, which are connected to the axial bore 14. The bores 16 are made centrally in the hexagonal surfaces of the nipple.

Bei allen aufgezeigten Varianten ist die Wirkungsweise wie folgt: Der bei einem Flammenrückschlag durch das Ventil 5 und die Ventilöffnung 3 in die Druckgasflasche eindrin­gende Flammenstrahl wird von der Prallscheibe zu der Innenoberfläche des Stahlmantels 1 und zu der Metallmasse des Ventils 5 hin reflektiert, wo die Flammenergie aufgenommen und nach außen weitergeleitet wird. Dadurch wird ein tiefes Eindringen der Flammenstrahlen in den Masseblock 2 und somit eine Flaschenexplosion verhindert. Die Sicherheit einer solchen Druckgasflasche wird somit auf einfache Art und Weise erheblich verbessert.In all the variants shown, the mode of operation is as follows: The flame jet penetrating the compressed gas bottle in the event of a flashback through the valve 5 and the valve opening 3 is reflected by the baffle plate to the inner surface of the steel jacket 1 and to the metal mass of the valve 5, where the flame energy is recorded and forwarded to the outside. This prevents the flame jets from penetrating deeply into the mass block 2 and thus prevents a bottle explosion. The safety of such a compressed gas bottle is thus considerably improved in a simple manner.

Claims (6)

1. Druckgasbehälter mit einer darin befindlichen, von einem Lösungsmittel getränkten, porösen Füllmasse, in der ein explosibles Gas gelöst enthalten ist, wobei eine zwischen einer Ventilöffnung und der Füllmasse angeordnete Sicherheitsvorrichtung zum Ableiten von Flammenrückschlägen vorgesehen ist, dadurch gekennzeichnet, daß die Sicherheitsvorrichtung aus einer senkrecht zur Ventilöffnungs-Mittelachse angeordneten, von der Innenwandung der Druckgasflasche beabstandeten Prallscheibe (8) besteht.1. Pressurized gas container with a porous filling compound soaked in a solvent therein, in which an explosive gas is contained in solution, a safety device arranged between a valve opening and the filling compound being provided for discharging flashbacks, characterized in that the safety device consists of a There is a baffle plate (8) arranged perpendicular to the central axis of the valve opening and spaced from the inner wall of the compressed gas bottle. 2. Druckgasbehälter nach Anspruch 1, dadurch gekennzeichnet, daß die Prallscheibe (8) aus einer kreisförmigen Stahlblechscheibe besteht, deren Durchmesser den Durchmesser der Flaschenhalsöffnung für das Ventil (3) nicht überschreitet.2. Pressurized gas container according to claim 1, characterized in that the baffle plate (8) consists of a circular sheet steel plate, the diameter of which does not exceed the diameter of the bottle neck opening for the valve (3). 3. Druckgasbehälter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Prallscheibe (8) zur Ventilöffnung (3) hin konkav gewölbt ist.3. Pressurized gas container according to claim 1 or 2, characterized in that the baffle plate (8) to the valve opening (3) is concavely curved. 4. Druckgasbehälter nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Prall­scheibe (8) zentrisch von einem Stift (10) durchsetzt ist, dessen beiden Enden über die Prallscheibe (8) hinausragen, wobei das der Ventilöffnung (3) entgegengesetzte Ende angespitzt und in der Füllmasse (2) fixiert ist.4. Pressurized gas container according to one of the preceding claims, characterized in that the baffle plate (8) is penetrated centrally by a pin (10), the two ends of which protrude beyond the baffle plate (8), the opposite end of the valve opening (3) being pointed and is fixed in the filling compound (2). 5. Druckgasbehälter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Prallscheibe (8) an der Innenseite des Ventiles (5) mit Abstand zu diesem befestigt ist.5. Pressurized gas container according to one of claims 1 to 3, characterized in that the baffle plate (8) on the inside of the valve (5) is attached at a distance from this. 6. Druckgasbehälter nach Anspruch 5, dadurch gekennzeichnet, daß die Prallscheibe vom Boden (16) eines in den Ventilkonus (12) eingeschraubten Nippels (13) gebildet wird, der eine mit der Ventilbohrung (15) in Verbindung stehende Axialbohrung (14) aufweist und im bodennahen Bereich mit radialen Bohrungen (17) versehen ist, die an die Axialbohrung (14) ange­schlossen sind.6. Pressurized gas container according to claim 5, characterized in that the baffle plate is formed from the bottom (16) of a screwed into the valve cone (12) nipple (13) which has an axial bore (14) in communication with the valve bore (15) and in the area near the ground is provided with radial bores (17) which are connected to the axial bore (14).
EP90116896A 1989-09-06 1990-09-03 Pressurized gas vessel having a safety device for arresting flash-backs Expired - Lifetime EP0424644B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90116896T ATE97474T1 (en) 1989-09-06 1990-09-03 COMPRESSED GAS TANK WITH A SAFETY DEVICE FOR DRAINING FLAME STRIKES.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3929649 1989-09-06
DE3929649 1989-09-06
DE4015337A DE4015337A1 (en) 1989-09-06 1990-05-12 COMPRESSED GAS CONTAINER WITH A SAFETY DEVICE FOR DISCHARGING FLAME RETURNS
DE4015337 1990-05-12

Publications (2)

Publication Number Publication Date
EP0424644A1 true EP0424644A1 (en) 1991-05-02
EP0424644B1 EP0424644B1 (en) 1993-11-18

Family

ID=25884833

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Application Number Title Priority Date Filing Date
EP90116896A Expired - Lifetime EP0424644B1 (en) 1989-09-06 1990-09-03 Pressurized gas vessel having a safety device for arresting flash-backs

Country Status (6)

Country Link
EP (1) EP0424644B1 (en)
AU (1) AU631004B2 (en)
CZ (1) CZ278162B6 (en)
DE (2) DE4015337A1 (en)
ES (1) ES2048381T3 (en)
SK (1) SK433090A3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191112133A (en) * 1911-05-19 1911-12-30 Friedrich Wanz Device for the Prevention of Ignition when Opening Bottles containing Gas Under Pressure.
CH146108A (en) * 1930-03-19 1931-03-31 Elektrochemische Ges Mit Besch Device on hollow bodies containing explosive substances to prevent the propagation of explosions.
EP0055424A1 (en) * 1980-12-25 1982-07-07 Nihon Coyne Kabushiki Kaisha Flash-back arrestor for high pressure gas cylinders

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE510486C (en) * 1930-10-20 Vulkan Akt Ges Fuer Bergbau Un Protection device for Dissous bottles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191112133A (en) * 1911-05-19 1911-12-30 Friedrich Wanz Device for the Prevention of Ignition when Opening Bottles containing Gas Under Pressure.
CH146108A (en) * 1930-03-19 1931-03-31 Elektrochemische Ges Mit Besch Device on hollow bodies containing explosive substances to prevent the propagation of explosions.
EP0055424A1 (en) * 1980-12-25 1982-07-07 Nihon Coyne Kabushiki Kaisha Flash-back arrestor for high pressure gas cylinders

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPIL, no. 81-65354D, Derwent Publications Ltd, London, GB; & JP-B-56 034 760 (NIPPON KOIN K.K.) 12-08-1981; & JP-A-54 047 119 (NIPPON KOIN K.K.) 13-04-1979 *

Also Published As

Publication number Publication date
DE4015337C2 (en) 1991-11-07
ES2048381T3 (en) 1994-03-16
DE4015337A1 (en) 1991-03-21
SK278195B6 (en) 1996-03-06
EP0424644B1 (en) 1993-11-18
SK433090A3 (en) 1996-03-06
CZ278162B6 (en) 1993-09-15
AU6201690A (en) 1991-03-14
AU631004B2 (en) 1992-11-12
CS9004330A2 (en) 1991-10-15
DE59003536D1 (en) 1993-12-23

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