EP0303839A1 - Foot for a pressurised-gas bottle made from highly alloyed chromium-nickel steels - Google Patents

Foot for a pressurised-gas bottle made from highly alloyed chromium-nickel steels Download PDF

Info

Publication number
EP0303839A1
EP0303839A1 EP88111638A EP88111638A EP0303839A1 EP 0303839 A1 EP0303839 A1 EP 0303839A1 EP 88111638 A EP88111638 A EP 88111638A EP 88111638 A EP88111638 A EP 88111638A EP 0303839 A1 EP0303839 A1 EP 0303839A1
Authority
EP
European Patent Office
Prior art keywords
foot
pressurised
welded
gas bottle
bottom part
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Withdrawn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
EP88111638A
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Gladbach
Martin Dr. Kesten
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0303839A1 publication Critical patent/EP0303839A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/084—Mounting arrangements for vessels for small-sized storage vessels, e.g. compressed gas cylinders or bottles, disposable gas vessels, vessels adapted for automotive use
    • 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
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • 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
    • F17C2203/0648—Alloys or compositions of metals

Definitions

  • the invention relates to a foot for pressurized gas containers made of high-alloy chrome-nickel steels according to the preamble of claim 1.
  • Pressurized gas containers for the storage and distribution of ultra-pure gases are made of rustproof, high-alloy chrome-nickel steels. As a rule, these are compressed gas cylinders with a content between 5 and 50 liters, which are made as a welded construction from a seamless or longitudinally welded cylindrical tube. This tube is closed by two welded-on floors. Since chrome-nickel steels have only a very low strength, pressurized gas containers made from them have to be cryoformed.
  • the prefabricated container is cooled to very low temperatures and plastically deformed by internal pressure until the container material has reached the strength required for later operational use.
  • the bottom of the bottle is expediently designed as a dished or arched base.
  • the base is easily deformable, so that the cryogenic deformation can be carried out easily. This is because it represents a relatively low flow restriction for the subsequent cylindrical container part and thereby changes into the hemisphere shape.
  • the only problem here is the bottle foot if it is formed in a conventional manner by welding a foot ring to the lower part of the compressed gas container. The possibility of welding the foot ring after the cryogenic deformation has been carried out must be disregarded, since subsequent heat treatment would reverse the increase in strength caused by cryogenic deformation. All welding work required to manufacture the pressurized gas container must therefore be carried out before cryogenic deformation.
  • the invention is therefore based on the object of providing a base for compressed gas containers made of high-alloy chromium-nickel steels which, on the one hand, does not hinder the implementation of the cryogenic deformation, and on the other hand makes welding work on the compressed gas container unnecessary after the cryogenic deformation has been carried out.
  • the detachably attached base part according to the invention on the lower part of the pressurized gas container enables the container base to deform freely and uniformly during cryogenic deformation.
  • the welding work required to attach the foot section can be carried out before cryoforming. This is simply the welding of preferably a threaded pin. This almost spot welding on the bottom of the container in no way hinders the cryogenic deformation of the bottom.
  • the drawing illustrates an embodiment of the invention in longitudinal section.
  • a compressed gas container made of a high-alloy chrome-nickel steel consisting of a cylindrical tube 1 and a base 2 welded to it.
  • a threaded pin 3 is welded in the middle of the base 2.
  • the cryogenic deformation is carried out with a welded-on threaded pin 3.
  • the bottom 2 takes on its final shape.
  • a foot part 4 which has a hole for the threaded pin 3 in the middle, is screwed on by means of a nut 5 and a locking ring 6 after the cryogenic deformation.
  • a plurality of threaded pins 3 can also be provided.
  • the foot part 4 is preferably made of shockproof plastic, which reduces the weight of the bottle and the noise during loading and transportation of the compressed gas container is reduced.

Landscapes

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

Abstract

Pressurised-gas bottles made of high-alloy chromium-nickel steels for the storage of ultra-pure gases are cryogenically worked to improve the strength properties. The foot ring normally welded to the bottom part of the pressurised-gas bottle in order to form the bottle foot, which bottom part consists of a cylindrical tube (1) and welded-on end (2), impairs the cryogenic working. Welding the foot ring to the bottom part after the cryogenic working would destroy the strength properties again. Therefore a detachable foot part (4) is attached to the bottom part of the pressurised-gas bottle. The foot part is preferably made of shock-proof plastic and is screwed on via a threaded stem (3) welded to the end. <IMAGE>

Description

Die Erfindung betrifft einen Fuß für Druckgasbehälter aus hochlegierten Chrom-Nickelstählen nach dem Oberbe­griff des Anspruches 1.The invention relates to a foot for pressurized gas containers made of high-alloy chrome-nickel steels according to the preamble of claim 1.

Druckgasbehälter für die Speicherung und Verteilung von ultrareinen Gasen werden aus rostfreien, hochlegierten Chrom-Nickelstählen hergestellt. In der Regel handelt es sich hierbei um Druckgasflaschen mit einem Inhalt zwischen 5 und 50 Litern, die als Schweißkonstruktion aus einem nahtlosen oder längsnahtgeschweißten zylin­drischen Rohr hergestellt werden. Dieses Rohr wird durch zwei angeschweißte Böden verschlossen. Da Chrom-Nickel­stähle nur eine sehr geringe Festigkeit besitzen, müssen Druckgasbehälter, die daraus gefertigt werden, kryover­formt werden.Pressurized gas containers for the storage and distribution of ultra-pure gases are made of rustproof, high-alloy chrome-nickel steels. As a rule, these are compressed gas cylinders with a content between 5 and 50 liters, which are made as a welded construction from a seamless or longitudinally welded cylindrical tube. This tube is closed by two welded-on floors. Since chrome-nickel steels have only a very low strength, pressurized gas containers made from them have to be cryoformed.

Dabei wird der vorgefertigte Behälter auf sehr tiefe Temperaturen angekühlt und durch Innendruck plastisch verformt, bis das Behältermaterial die für den späteren Betriebseinsatz erforderliche Festigkeit erreicht hat.The prefabricated container is cooled to very low temperatures and plastically deformed by internal pressure until the container material has reached the strength required for later operational use.

Zweckmäßigerweise wird der Flaschenboden als Klöpper-­oder Korbbogenboden ausgeführt. In dieser Form ist der Boden gut verformbar, so daß sich die Kryoverformung leicht durchführen läßt. Er stellt nämlich eine ver­hältnismäßig geringe Fließbehinderung für den an­schließenden zylindrischen Behälterteil dar und geht dabei in die Halbkugelform über. Schwierigkeiten be­reitet hier lediglich der Flaschenfuß, wenn er auf konventionelle Art durch Anschweißen eines Fußringes an den unteren Teil des Druckgasbehälters gebildet wird. Die Möglichkeit, den Fußring nach Durchführung der Kryoverformung anzuschweißen, muß außer Betracht bleiben, da eine nachträgliche Wärmebehandlung die durch Kryoverformung hervorgerufene Festigkeitssteige­rung wieder rückgängig machen würde. Alle für die Her­stellung des Druckgasbehälters erforderlichen Schweißar­beiten müssen daher vor der Kryoverformung durchgeführt sein.The bottom of the bottle is expediently designed as a dished or arched base. In this form, the base is easily deformable, so that the cryogenic deformation can be carried out easily. This is because it represents a relatively low flow restriction for the subsequent cylindrical container part and thereby changes into the hemisphere shape. The only problem here is the bottle foot if it is formed in a conventional manner by welding a foot ring to the lower part of the compressed gas container. The possibility of welding the foot ring after the cryogenic deformation has been carried out must be disregarded, since subsequent heat treatment would reverse the increase in strength caused by cryogenic deformation. All welding work required to manufacture the pressurized gas container must therefore be carried out before cryogenic deformation.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Fuß für Druckgasbehälter aus hochlegierten Chrom-Nickel­stählen zu schaffen, welcher einerseits die Durchführung der Kryoverformung nicht behindert, andererseits Schweiß­arbeiten am Druckgasbehälter nach Durchführung der Kryo­verformung unnötig macht.The invention is therefore based on the object of providing a base for compressed gas containers made of high-alloy chromium-nickel steels which, on the one hand, does not hinder the implementation of the cryogenic deformation, and on the other hand makes welding work on the compressed gas container unnecessary after the cryogenic deformation has been carried out.

Ausgehend von dem im Oberbegriff des Anspruches 1 berück­sichtigten Stand der Technik ist diese Aufgabe erfindungs­gemäß gelöst mit den im kennzeichnenden Teil des An­spruches 1 angegebenen Merkmalen.Starting from the prior art taken into account in the preamble of claim 1, this object is achieved according to the invention with the features specified in the characterizing part of claim 1.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.

Das gemäß der Erfindung am unteren Teil des Druckgasbe­hälters lösbar angebrachte Fußteil ermöglicht es, daß sich der Behälterboden bei der Kryoverformung frei und gleichmäßig verformen kann. Die zur Befestigung des Fußteils erforderlichen Schweißarbeiten können vor der Kryoverformung durchgeführt werden. Es handelt sich hier­bei lediglich um das Anschweißen von vorzugsweise einem Gewindezapfen. Diese nahezu punktförmige Schweißung am Behälterboden behindert die Kryoverformung des Bodens in keiner Weise.The detachably attached base part according to the invention on the lower part of the pressurized gas container enables the container base to deform freely and uniformly during cryogenic deformation. The welding work required to attach the foot section can be carried out before cryoforming. This is simply the welding of preferably a threaded pin. This almost spot welding on the bottom of the container in no way hinders the cryogenic deformation of the bottom.

Die Zeichnung veranschaulicht ein Ausführungsbeispiel der Erfindung im Längsschnitt.The drawing illustrates an embodiment of the invention in longitudinal section.

Dargestellt ist der untere Teil eines Druckgasbehälters aus einem hochlegierten Chrom-Nickelstahl, bestehend aus einem zylindrischen Rohr 1 und einem an dieses ange­schweißten Boden 2. Erfindungsgemäß ist in der Mitte des Bodens 2 ein Gewindezapfen 3 angeschweißt. Die Kryoverformung wird mit angeschweißtem Gewindezapfen 3 durchgeführt. Hierbei nimmt der Boden 2 seine endgültige Form an. Zur Bildung des Flaschenfußes wird nach der Kryoverformung mittels einer Mutter 5 und eines Sicherungs­ringes 6 ein Fußteil 4 angeschraubt, welcher in der Mitte eine Bohrung für den Gewindezapfen 3 besitzt. Bei größe­ren Druckgasbehältern können auch mehrere Gewindezapfen 3 vorgesehen werden. Der Fußteil 4 besteht vorzugsweise aus stoßfestem Kunststoff, wodurch das Flaschengewicht verringert und die Geräuschentwicklung beim Verladen und beim Transport der Druckgasbehälter vermindert wird.The lower part of a compressed gas container made of a high-alloy chrome-nickel steel is shown, consisting of a cylindrical tube 1 and a base 2 welded to it. According to the invention, a threaded pin 3 is welded in the middle of the base 2. The cryogenic deformation is carried out with a welded-on threaded pin 3. Here, the bottom 2 takes on its final shape. To form the bottle base, a foot part 4, which has a hole for the threaded pin 3 in the middle, is screwed on by means of a nut 5 and a locking ring 6 after the cryogenic deformation. In the case of larger compressed gas containers, a plurality of threaded pins 3 can also be provided. The foot part 4 is preferably made of shockproof plastic, which reduces the weight of the bottle and the noise during loading and transportation of the compressed gas container is reduced.

Claims (4)

1. Fuß für Druckgasbehälter aus hochlegierten Chrom-­Nickelstählen, bestehend aus einem Fußteil (4), wel­ches an dem aus einem zylindrischen Rohr (1) und an­geschweißten Boden (2) bestehenden unteren Teil des Druckgasbehälters angebracht ist,
dadurch gekennzeichnet,
daß das Fußteil lösbar angebracht ist.1. foot for compressed gas containers made of high-alloy chrome-nickel steel, consisting of a foot part (4) which is attached to the lower part of the compressed gas container consisting of a cylindrical tube (1) and welded-on base (2),
characterized,
that the foot part is detachably attached. 2. Fuß nach Anspruch 1,
dadurch gekennzeichnet,
daß das Fußteil über zumindest einen am Boden ange­schweißten Gewindezapfen angeschraubt ist.2. foot according to claim 1,
characterized,
that the foot part is screwed on at least one threaded pin welded to the floor. 3. Fuß nach Anspruch 2,
dadurch gekennzeichnet,
daß das Fußteil über einen am Boden angeschweißten Gewindezapfen (3) angeschraubt ist.3. foot according to claim 2,
characterized,
that the foot part is screwed onto a threaded pin (3) welded to the floor. 4. Fuß nach einem der Ansprüche 1-3,
dadurch gekennzeichnet,
daß das Fußteil aus stoßfestem Kunststoff besteht.4. foot according to one of claims 1-3,
characterized,
that the foot part is made of shockproof plastic.
EP88111638A 1987-08-17 1988-07-20 Foot for a pressurised-gas bottle made from highly alloyed chromium-nickel steels Withdrawn EP0303839A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8711147U 1987-08-17
DE8711147U DE8711147U1 (en) 1987-08-17 1987-08-17 Base for pressure gas containers made of high-alloy chrome-nickel steels

Publications (1)

Publication Number Publication Date
EP0303839A1 true EP0303839A1 (en) 1989-02-22

Family

ID=6811129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111638A Withdrawn EP0303839A1 (en) 1987-08-17 1988-07-20 Foot for a pressurised-gas bottle made from highly alloyed chromium-nickel steels

Country Status (3)

Country Link
EP (1) EP0303839A1 (en)
JP (1) JPS6465399A (en)
DE (1) DE8711147U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1036112C (en) * 1989-04-14 1997-10-15 武田药品工业株式会社 Diamino-vinyl compounds

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2784169B1 (en) * 1998-10-02 2000-12-15 Schneider Ind GAS CYLINDER
FR2790306B1 (en) * 1999-02-25 2001-04-06 Gaz De Petrole FOOT GAS BOTTLE IN PLASTIC MATERIAL

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456831A (en) * 1957-08-16 1969-07-22 Avesta Jernverks Ab Austenitic stainless steel pressure vessels
GB1558409A (en) * 1977-10-06 1980-01-03 Boc Ltd Fluid storage vessels
FR2435663A1 (en) * 1978-09-05 1980-04-04 Vmw Ranshofen Berndorf Ag METAL CONTAINER SUCH AS A PRESSURIZED GAS BOTTLE WHOSE INSERTS ARE FIXED BY BOLTS WELDED BY HIGH FREQUENCY WELDING

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456831A (en) * 1957-08-16 1969-07-22 Avesta Jernverks Ab Austenitic stainless steel pressure vessels
GB1558409A (en) * 1977-10-06 1980-01-03 Boc Ltd Fluid storage vessels
FR2435663A1 (en) * 1978-09-05 1980-04-04 Vmw Ranshofen Berndorf Ag METAL CONTAINER SUCH AS A PRESSURIZED GAS BOTTLE WHOSE INSERTS ARE FIXED BY BOLTS WELDED BY HIGH FREQUENCY WELDING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1036112C (en) * 1989-04-14 1997-10-15 武田药品工业株式会社 Diamino-vinyl compounds

Also Published As

Publication number Publication date
JPS6465399A (en) 1989-03-10
DE8711147U1 (en) 1987-10-01

Similar Documents

Publication Publication Date Title
DE3736579C3 (en) Pressure tank for storing gases of high purity
DE364413T1 (en) HERMETIC METAL PIPE CONNECTION.
DE971689C (en) Breathing apparatus with a compressed gas storage container designed as a flat component
EP0303840B1 (en) Valve bushing for the receipt of the gas bottle valve of a pressurised-gas container made from highly alloyed chromium-nickel steels
DE2050779C2 (en) Tanker for the transport of liquefied gas at very low temperatures
EP0303839A1 (en) Foot for a pressurised-gas bottle made from highly alloyed chromium-nickel steels
DE1259917B (en) Inner container of a tank for low-boiling liquefied gases
EP0314608A2 (en) Method of and apparatus for producing three-dimensional sculpture works on a desired reduced scale
DE19639997B4 (en) Safety device for a cylindrical pressure gas container
DE761221C (en) Jacketed pressurized gas cylinder
DE3809290A1 (en) COOLING DEVICE
DE3133316A1 (en) CYLINDRICAL CONTAINER WITH FOOT RING AND CLUTCH DEVICE
EP0372373A2 (en) Coupling for technical gases and fluids
DE3815347C2 (en)
DE1837013U (en) REEL, IN PARTICULAR FOR TEXTILE PURPOSES.
DE1160455B (en) Coiled high pressure gas container
DE3608563C2 (en)
DE69408997T2 (en) TOWER-SHAPED DEVICE IN BALL CONTAINERS FOR TRANSPORTING LIQUID GAS
AT204955B (en) Large containers for transporting industrial gases, in particular natural gas, preferably on railroad cars
DE1951945C (en) Axially sprung coupling rod for pushing boat units lying next to one another
DE1885741U (en) PIPE WITH ENDS THICKENED BY RINGS OR PIECES OF PIPE.
DE6947647U (en) GAS-TIGHT PASS-THROUGH
DE10313146A1 (en) Pressurized container, to hold a gas under pressure for storage and transport, is a pipe with longitudinal welds and closed at the ends by bonded flanges, with an opening for filling/emptying
Figlhuber et al. Inspection and testing facility for pipesockets
DE1107147B (en) Metal container for liquids

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890823