DE3723124A1 - Compressed-gas cylinder and method of producing it - Google Patents

Compressed-gas cylinder and method of producing it

Info

Publication number
DE3723124A1
DE3723124A1 DE19873723124 DE3723124A DE3723124A1 DE 3723124 A1 DE3723124 A1 DE 3723124A1 DE 19873723124 DE19873723124 DE 19873723124 DE 3723124 A DE3723124 A DE 3723124A DE 3723124 A1 DE3723124 A1 DE 3723124A1
Authority
DE
Germany
Prior art keywords
inner container
sleeve
walled
pressure
thick
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.)
Withdrawn
Application number
DE19873723124
Other languages
German (de)
Inventor
Theodor Dipl Ing Cyron
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.)
Siemens AG
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Priority to DE19873723124 priority Critical patent/DE3723124A1/en
Priority to PCT/DE1988/000433 priority patent/WO1989000658A1/en
Publication of DE3723124A1 publication Critical patent/DE3723124A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/10—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for protection against corrosion, e.g. due to gaseous acid
    • 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
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0123—Shape cylindrical with variable thickness or diameter
    • 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
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0604—Liners
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls
    • 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
    • F17C2221/05—Ultrapure 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
    • 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
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/012—Reducing weight
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/05—Improving chemical properties
    • F17C2260/053—Reducing corrosion
    • 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
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use
    • F17C2270/0518—Semiconductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A compressed-gas cylinder which is as light as possible, in particular for high-purity gases or corrosive gases, and a method of producing such cylinders from an outer, pressure-resistant sleeve made of a high-strength material and a thin-walled inner container made of high-grade steel with a thick-walled neck. The inner container is first pushed into the sleeve open at one end, and then this sleeve is narrowed from outside in a bottle shape. <IMAGE>

Description

Die vorliegende Erfindung betrifft eine möglichst leichte Druckgasflasche, insbesondere für Reinstgase oder aggressive Gase und ein Verfahren zur Herstellung solcher Flaschen.The present invention relates to the lightest possible Pressurized gas cylinder, especially for high-purity gases or aggressive ones Gases and a process for making such bottles.

Solche Druckgasflaschen sind erforderlich im Rahmen der ständig steigenden Anforderungen für Prüf- und Prozeßgase, beispielsweise in der Mikroelektronikentwicklung und -fertigung, wo die fabrikationstechnisch erreichbare Oberflächenreinheit der bisher verwendeten einwandigen Aluminium-Druckgasflaschen nicht mehr ausreicht, so daß in Zukunft Edelstahlflaschen notwendig werden. Die einwandigen Edelstahlflaschen sind aber in der Herstellung und vom Material her sehr teuer, insbesondere weil sie wegen der geringeren Werkstoff-Festigkeit dickwandiger ausgeführt werden müssen als gleich feste Stahlflaschen und somit auch das Transportgewicht erheblich vergrößern.Such Pressurized gas cylinders are required under the constant increasing requirements for test and process gases, for example in microelectronics development and -production where the technically achievable Surface cleanliness of the single wall used previously Aluminum compressed gas cylinders are no longer sufficient, so that in Future stainless steel bottles will be necessary. The single wall Stainless steel bottles are in the manufacture and material ago very expensive, especially because of the lower Material strength must be made thicker than equally strong steel bottles and thus also the transport weight enlarge significantly.

Aus dem deutschen Patent 23 64 377.8 ist eine Stahlflasche für einige bestimmte Gasgemische bekannt, bei der die Innenfläche galvanisch verzinnt oder verzinkt ist, um Reaktionen mit diesen Gasen zu vermeiden.From the German patent 23 64 377.8 is a steel bottle for some certain gas mixtures are known in which the inner surface is tin-plated or galvanized to react with them Avoid gases.

In der deutschen Offenlegungsschrift 27 13 590.6 wird ein Druckbehälter aus Stahl zur Aufbewahrung von gasförmigem Wasserstoff vorgeschlagen, bei dem die Innenoberfläche des Druckbehälters mit einer Schutzschicht aus einem besonderen Metall versehen ist. Als Schutzschicht werden Metalle der ersten oder zweiten Nebengruppe oder der dritten Hauptgruppe des periodischen Systems vorgeschlagen, insbesondere Zink, Cadmium, Silber, Gold oder Blei. Schutzschichten dieser Art sollen für Wasserstoff undurchlässig sein. Über die Aufbringung dieser Schutzschicht wird nur gesagt, daß sie galvanisch oder mechanisch auf die innere Oberfläche der Druckbehälter aufgebracht werden kann.In German Offenlegungsschrift 27 13 590.6 a Steel pressure vessel for storing gaseous Proposed hydrogen, in which the inner surface of the Pressure vessel with a protective layer made of a special Metal is provided. Metals are used as a protective layer first or second subgroup or the third main group of the periodic system, especially zinc, Cadmium, silver, gold or lead. Protective layers of this kind are said to be impermeable to hydrogen. About the  Application of this protective layer is only said to be galvanically or mechanically on the inner surface of the Pressure vessels can be applied.

In dem deutschen Patent 31 03 646.5 wird ein Druckbehälter für Gase, insbesondere aus Leichtmetall, mit einem gewickelten faserverstärkten Kunststoffmantel, vorgeschlagen.In the German patent 31 03 646.5 a pressure vessel for Gases, especially made of light metal, with a wound fiber-reinforced plastic jacket, proposed.

Aufgabe der vorliegenden Erfindung ist eine leichte Druckgasflasche, insbesondere für Reinstgase oder korrosive Gase sowie ein Verfahren zur Herstellung dieser Druckflaschen. Diese Druckflaschen sollen weder die darin enthaltenen Gase verunreinigen noch mit ihnen chemisch reagieren.The object of the present invention is an easy one Pressurized gas bottle, especially for high-purity or corrosive Gases and a process for producing these pressure bottles. These pressure bottles are said not to contain the gases contained therein contaminate still react chemically with them.

Zur Lösung dieser Aufgabe wird eine Druckflasche und Verfahren zu ihrer Herstellung nach den beiliegenden Ansprüchen vorgeschlagen.A pressure bottle and method is used to solve this task for their manufacture according to the attached claims suggested.

Diese Druckflasche besteht aus einer äußeren druckfesten Hülse, insbesondere aus einem hochfesten Stahl und einem im wesentlichen dünnwandigen Innenbehälter aus Edelstahl. Dieser Innenbehälter hat einen dickwandigen Hals zur Aufnahme eines Gewindes für die an solchen Druckflaschen üblichen Armaturen. Die äußere druckfeste Hülse umgibt den Innenbehälter eng anliegend und auch dessen dickwandigen Hals, damit die an der Absperrarmatur bzw. an diesem dickwandigen Hals angreifenden Kräfte direkt an die äußere Hülle weitergeleitet werden.This pressure bottle consists of an outer pressure-resistant sleeve, in particular from a high-strength steel and a essential thin-walled inner container made of stainless steel. This Inner container has a thick-walled neck to hold one Thread for the fittings customary on such pressure bottles. The outer pressure-resistant sleeve tightly surrounds the inner container tight and also its thick-walled neck, so that the on the Shut-off valve or attacking this thick-walled neck Forces are transmitted directly to the outer shell.

Nach Anspruch 2 hat der dickwandige Hals des Innenbehälters außen ein oder mehrere Ringnuten, in die die äußere druckfeste Hülle hineingepreßt ist, um eventuelle Axialkräfte zwischen beiden zu übertragen und den Spalt abzudichten.According to claim 2, the thick-walled neck of the inner container outside one or more ring grooves into which the outer pressure-resistant Shell is pressed in between axial forces to transfer both and seal the gap.

Nach dem 3. Anspruch wird der dünnwandige Innenbehälter zunächst in die an einem Ende offene äußere Hülse eingeschoben und dann erst die äußere Hülse verformt bzw. verengt, wie es bei der Herstellung von einwandigen Druckflaschen üblich ist. Der Innenbehälter wird normalerweise aus mehreren Teilen zusammengesetzt, die anschließend verschweißt und mit üblichen Methoden geprüft werden können. Dabei ist es zweckmäßig, dem Innenbehälter eine Form zu geben, die der späteren Innenform der äußeren Hülse entspricht.According to the 3rd claim, the thin-walled inner container first inserted into the outer sleeve open at one end  and only then deformed or narrowed the outer sleeve as it did is common in the production of single-walled pressure bottles. The inner container is usually made up of several parts assembled, which are then welded together with usual Methods can be checked. It is useful to To give the inner container a shape that corresponds to the later inner shape corresponds to the outer sleeve.

Nach dem 4. Anspruch wird der Innenbehälter nach dem Verengen der äußeren Hülse hydraulisch- oder pneumatisch-plastisch aufgeweitet, damit er sich nahezu spaltfrei an die äußere Hülle anlegt. Nach diesem Verfahren werden eventuelle Spalte, die sich aufgrund von Fertigungsungenauigkeiten ergeben können, vermieden.According to the 4th claim, the inner container after the narrowing the outer sleeve is hydraulic or pneumatic-plastic expanded so that it adheres to the outer shell almost without any gaps creates. After this procedure, any column that can arise due to manufacturing inaccuracies, avoided.

Nach dem 5. Anspruch erhält der Innenbehälter absichtlich einige Wellen. Mit einer umlaufenden Welle wird erreicht, daß der Innenbehälter sich an beiden Enden an den Boden bzw. Hals der äußeren Hülle anlegt. Mit Längswellen im zylindrischen Teil des Innenbehälters wird seine Einführung in die äußere Hülle erleichtert. Auch diese Wellen werden durch das anschließende Aufweiten an der äußeren Hülle zum Anliegen gebracht.After the 5th claim, the inner container intentionally receives some waves. With a rotating shaft it is achieved that the inner container is attached to the bottom or neck at both ends the outer shell. With longitudinal waves in the cylindrical part the inner container is its introduction into the outer shell facilitated. These waves are also caused by the subsequent Widening brought to bear on the outer shell.

Nach dem 6. Anspruch wird der Spalt zwischen Innenbehälter und äußerer Hülse vor dem Aufweiten evakuiert, damit hier keine wesentlichen Gas- oder Luftmengen zurückbleiben können.According to the 6th claim, the gap between the inner container and outer sleeve evacuated before expansion, so that none substantial amounts of gas or air can remain.

Fig. 1 zeigt einen senkrechten Längsschnitt durch eine erfindungsgemäße Druckflasche, und zwar in der rechten Hälfte vor dem Verformen und in der linken Hälfte nach dem Verformen der äußeren Hülse. Fig. 1 shows a vertical longitudinal section through a pressure bottle according to the invention, in the right half before the deformation and in the left half after the deformation of the outer sleeve.

Die äußere Hülse 1 besteht zunächst aus einem einseitig offenen, beispielsweise im Tiefziehverfahren hergestellten Behälter. Der Innenbehälter besteht in diesem Fall aus einem halbkugeligen Boden 2, einem zylindrischen Mantel 3, einem Übergangsstück 4 und einem dickwandigen Hals 5, wobei die Teile 2 bis 5 durch Schweißnähte miteinander verbunden sind, die einwandfrei geprüft werden können. Teil 5 enthält noch eine umlaufende Ringnut 6 mit abgerundeten Kanten, in die beim späteren Umformen die äußere Hülse 1 hineingepreßt wird. Nach dem Einschieben des Innenbehälters, bestehend aus den Teilen 2 bis 5 wird die äußere Hülse 1 verformt bzw. verengt, wie es bei der Herstellung von einwandigen Druckflaschen üblich ist. Dabei ist es sinnvoll, dem Innenbehälter, der sich ja wesentlich leichter verformen läßt, von vornherein die Form zu geben, die sich beim späteren Verformen der äußeren Hülse 1 ergibt. Nach dem Umformen kann die Hülse 1 bei 7 mit dem Hals 5 verschweißt werden. Die Teile 2 bis 4 sind wegen der deutlicheren Darstellung dicker gezeichnet als notwendig. Eine Wandstärke von 0,5-0,8 mm ist ausreichend und läßt sich einwandfrei verschweißen.The outer sleeve 1 initially consists of a container which is open on one side and is manufactured, for example, by deep-drawing. In this case, the inner container consists of a hemispherical base 2 , a cylindrical jacket 3 , a transition piece 4 and a thick-walled neck 5 , the parts 2 to 5 being connected to one another by welds which can be checked without any problems. Part 5 also contains a circumferential annular groove 6 with rounded edges, into which the outer sleeve 1 is pressed during later shaping. After inserting the inner container, consisting of parts 2 to 5 , the outer sleeve 1 is deformed or narrowed, as is customary in the production of single-walled pressure bottles. It makes sense to give the inner container, which is much easier to deform, from the outset the shape that results from the later deformation of the outer sleeve 1 . After forming, the sleeve 1 can be welded to the neck 5 at 7 . Parts 2 to 4 are drawn thicker than necessary because of the clearer representation. A wall thickness of 0.5-0.8 mm is sufficient and can be welded perfectly.

Claims (6)

1. Druckgasflasche mit einer äußeren druckfesten Hülse und einer inneren korrosionsbeständigen metallischen Schicht, dadurch gekennzeichnet, daß die Druckgasflasche innen einen dünnwandigen Innenbehälter (2, 3, 4) aus Edelstahl mit einem dickwandigen Hals (5) enthält, der von der äußeren Hülse (1) umgeben ist.1. Pressurized gas bottle with an outer pressure-resistant sleeve and an inner corrosion-resistant metallic layer, characterized in that the pressurized gas bottle contains a thin-walled inner container ( 2 , 3 , 4 ) made of stainless steel with a thick-walled neck ( 5 ) from the outer sleeve ( 1 ) is surrounded. 2. Druckflasche nach Anspruch 1, dadurch gekennzeichnet, daß der dickwandige Hals (5) des Innenbehälters außen ein oder mehrere Ringnuten (6) hat, in die die äußere Hülse (1) hineingepreßt ist.2. Pressure bottle according to claim 1, characterized in that the thick-walled neck ( 5 ) of the inner container has one or more annular grooves ( 6 ) on the outside, into which the outer sleeve ( 1 ) is pressed. 3. Verfahren zur Herstellung von Druckgasflaschen mit einer äußeren druckfesten Hülse und einer inneren korrosions­ beständigen metallischen Schicht, dadurch gekennzeichnet, daß ein dünnwandiger Innenbehälter (2, 3, 4) aus Edelstahl mit einem dickwandigen Hals (5) in eine an einem Ende offene äußere Hülse (1) eingeschoben wird und die Hülse (1) anschließend von außen flaschenförmig verengt wird.3. A method for producing compressed gas cylinders with an outer pressure-resistant sleeve and an inner corrosion-resistant metallic layer, characterized in that a thin-walled inner container ( 2 , 3 , 4 ) made of stainless steel with a thick-walled neck ( 5 ) in an open at one end outer Sleeve ( 1 ) is inserted and the sleeve ( 1 ) is then narrowed from the outside in a bottle shape. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Innenbehälter (2, 3, 4) nach dem Verengen der Hülse (1) hydraulisch- oder pneumatisch­ plastisch aufgeweitet wird.4. The method according to claim 3, characterized in that the inner container ( 2 , 3 , 4 ) after the narrowing of the sleeve ( 1 ) is hydraulically or pneumatically expanded. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Innenbehälter (2, 3, 4) vor dem Aufweiten in Längs- und/oder Umfangsrichtung Wellen enthält.5. The method according to claim 4, characterized in that the inner container ( 2 , 3 , 4 ) contains waves before expansion in the longitudinal and / or circumferential direction. 6. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Spalt zwischen Innenbehälter (2, 3, 4) und Hülse (1) vor dem Aufweiten evakuiert wird.6. The method according to claim 4, characterized in that the gap between the inner container ( 2 , 3, 4 ) and sleeve ( 1 ) is evacuated before widening.
DE19873723124 1987-07-13 1987-07-13 Compressed-gas cylinder and method of producing it Withdrawn DE3723124A1 (en)

Priority Applications (2)

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DE19873723124 DE3723124A1 (en) 1987-07-13 1987-07-13 Compressed-gas cylinder and method of producing it
PCT/DE1988/000433 WO1989000658A1 (en) 1987-07-13 1988-07-11 Double-walled compressed gas cylinder

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DE19873723124 DE3723124A1 (en) 1987-07-13 1987-07-13 Compressed-gas cylinder and method of producing it

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815347A1 (en) * 1988-05-02 1989-11-16 Mannesmann Ag MULTI-PIECE PRESSURE TANK
CN104384284A (en) * 2014-09-11 2015-03-04 中材科技(成都)有限公司 Drawing production process of CNG encircled gas bottle liner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815347A1 (en) * 1988-05-02 1989-11-16 Mannesmann Ag MULTI-PIECE PRESSURE TANK
CN104384284A (en) * 2014-09-11 2015-03-04 中材科技(成都)有限公司 Drawing production process of CNG encircled gas bottle liner
CN104384284B (en) * 2014-09-11 2017-05-10 中材科技(成都)有限公司 Drawing production process of CNG encircled gas bottle liner

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