EP0318657B1 - Récipient à protection incorporée contre la surpression - Google Patents

Récipient à protection incorporée contre la surpression Download PDF

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Publication number
EP0318657B1
EP0318657B1 EP88115536A EP88115536A EP0318657B1 EP 0318657 B1 EP0318657 B1 EP 0318657B1 EP 88115536 A EP88115536 A EP 88115536A EP 88115536 A EP88115536 A EP 88115536A EP 0318657 B1 EP0318657 B1 EP 0318657B1
Authority
EP
European Patent Office
Prior art keywords
container
wall
rupture groove
groove
end wall
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.)
Expired - Lifetime
Application number
EP88115536A
Other languages
German (de)
English (en)
Other versions
EP0318657A1 (fr
Inventor
Karl-Heinz Dipl.-Ing. Zinkann
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.)
BLEFA GMBH
Original Assignee
Blefa 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
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Application filed by Blefa GmbH filed Critical Blefa GmbH
Publication of EP0318657A1 publication Critical patent/EP0318657A1/fr
Application granted granted Critical
Publication of EP0318657B1 publication Critical patent/EP0318657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape
    • B65D7/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape of curved cross-section, e.g. cans of circular or elliptical cross-section
    • B65D7/045—Casks, barrels, or drums in their entirety, e.g. beer barrels, i.e. presenting most of the following features like rolling beads, double walls, reinforcing and supporting beads for end walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/42—Details of metal walls

Definitions

  • the invention relates to a pressurized metal container with overpressure protection, in particular a beer keg with an essentially cylindrical side wall and bulging end walls, at least one end wall being provided with a connecting piece, and the container wall being provided in the region of an end wall with a tear groove partially enclosing a surface area , through which the wall thickness is reduced to a predetermined residual thickness.
  • a container of the type described above is known from DE-OS 35 33 406, which has a bulge in the bottom, the surface of which is provided with a tear groove which only partially surrounds a surface area. This takes advantage of the fact that if the permissible maximum pressure is exceeded, the container wall tears open at a precisely specified point and the excess pressure can escape.
  • the invention has for its object to provide a container of the type mentioned, which has an integrated overpressure protection in the container itself, which responds reliably and is easy to manufacture.
  • the tear groove is arranged in the transition region of the curvature of the end wall adjoining the side wall.
  • the arrangement in this area of the container has the advantage that even with a large residual wall thickness defined by the tear groove, a reliable and flawless cracking occurs when a predetermined maximum pressure is exceeded. This is due to the fact that, under the influence of the internal pressure, the bulged end wall is subjected to considerable transverse expansion in this edge region, which leads to a crack if a limit stress which can be predetermined by the depth of the tear groove is exceeded.
  • the groove expediently has an approximately wedge-shaped cross section, so that when pressure is applied, the necessary crack due to the notch effect and the superimposition of tensile and bending stresses in the area of the tear groove.
  • the ends of the tear groove have a smaller radius of curvature Edge area of the curved end wall runs out.
  • This makes it possible to use a rotating cutting tool to produce a tear groove with a constant groove depth, the circular tear groove being interrupted by the fact that the tool can run freely in the edge region.
  • the arrangement of the tear groove is also advantageous for the use of a punching tool with a closed cutting contour, since the cutting contour is stressed much more favorably.
  • the ends of the tear groove end in a recess formed in the container wall, in which the wall thickness is practically unchanged.
  • This arrangement also has the advantage of simple manufacture.
  • an approximately punctiform depression is preferably formed at the edge of the curvature.
  • the tear groove can now be machined with a circumferential tool that runs freely in the area of the molded-in depression, so that the tear groove has the same depth over its entire length and thus a perfect functional reliability is provided. Except for the area of the depression, cracking can occur when the excess pressure is applied Use the tear groove at every point so that local deviations in the material properties can have no influence.
  • the depression is arranged on the side of the surface area enclosed by the tear groove facing away from the edge area of the curved end face.
  • This arrangement has the advantage that most of the tear groove runs in the area which is subjected to the greatest transverse expansion when pressurized.
  • the further advantage of this arrangement is that such a tear groove can also be attached to barrels already in operation, since only a very small depression has to be incorporated here, which can also be attached to a finished barrel, for example, with a ball impact.
  • the standing or carrying ring which is usually arranged in the case of kegs and projects over the curved end face in the extension of the side wall, does not hinder the subsequent attachment.
  • the tear groove is arranged on the end wall carrying the connecting piece.
  • Such kegs are usually connected to the pressure system with the connection piece pointing upwards. If, when the specified maximum pressure is exceeded, the integrated overpressure safety device comes into operation, which, depending on the size of the remaining wall thickness specified by the tear groove, can be between pressures of 20 to 30 bar, then the usually gaseous pressure medium blows upwards. The recoil forces acting on the container are thus directed downwards, so that the container can tip over due to the lateral arrangement.
  • Another advantage is that the pressure reduction takes place much faster due to the escape of the gaseous medium, the gas volume to be blown off being generally considerably less than the remaining liquid volume still in the barrel.
  • the opening which is created when the tear is opened is directed essentially against the inner wall of the support ring, so that here a deflection of the escaping gas jet takes place, which is practically without any movement of the keg triggering force remains.
  • the arrangement on the end wall forming the container bottom is possible and equally effective with regard to a relatively low "response pressure".
  • the disadvantage is that with a tearing pressure of, for example, 20 bar and an opening cross section sufficient for the pressure to decrease as quickly as possible, the reaction forces which act on the container through the then jet-like liquid are so great that the container is raised almost like a floor .
  • An arrangement in the top end face is therefore preferable, as kegs of this type can then be safely placed directly under the dispenser.
  • the tear groove has an approximately trapezoidal cross section. This has the advantage that the necessary remaining thickness of the container wall can be kept somewhat larger in the area of the tear groove.
  • the beer keg shown in Fig. 1 in a vertical section a so-called keg, consists of two sections 1 and 2, which are deep-drawn from metal and are firmly connected to each other after the incorporation of the rolling rings 3 in the central plane via the weld 4.
  • the bulged end wall 5 of part 1 is provided with a connection fitting 6.
  • a barrel sump 8 is formed in the bulged end wall 7 of part 2 forming the base part.
  • a base ring 9 or 10 is welded to both the base part 7 and the end wall 5 forming the cover part.
  • Fig. 2 shows in section the dome-shaped lid part 5 of the keg shown in Fig. 1.
  • the cover part merges with a radius of curvature R1 into the essentially cylindrical side wall 22, which is considerably smaller than the radius of curvature R2 of the spherical cap part.
  • This edge region 21 is surrounded on the outside by the welded-on stand ring 10.
  • the circular tear groove 14 is worked in with a rotating cutting tool, the path of movement of the tool being laid such that it ends in the edge region 21 of the curvature of the end wall 5 which has the smaller radius of curvature R1, so that the top view 3 shows an open circular contour.
  • a crack occurs in the apex region 23 of the tear groove 14 due to the transverse expansion in the end face 5.
  • the surface area 16 enclosed by the tear groove 14 is opened outwards, as shown in broken lines in FIG. 2. Due to the material deformation, the crack occurs at about 20 to 24 bar.
  • the tear groove 14 can be wedge-shaped in cross-section or else trapezoidal. This results in a more favorable tear behavior, especially with regard to the superimposition of tensile and bending stresses in the event of overpressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Safety Valves (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Claims (6)

  1. Récipient pressurisable en métal avec protection contre la surpression, en particulier fût à bière, avec paroi latérale essentiellement cylindrique et parois d'about bombées, dans lequel au moins une paroi d'about est dotée d'un raccord, la paroi du récipient est dotée, au niveau d'une paroi d'about, d'une rainure de rupture entourant en partie une portion de surface, rainure qui réduit à une épaisseur résiduelle prédéterminée l'épaisseur de la paroi, caractérisé en ce que la rainure de rupture (14) est disposée dans la partie de transition (21) de la courbure de la paroi d'about (5) se raccordant à la paroi latérale (22).
  2. Récipient selon la revendication 1, caractérisé en ce que la rainure de rupture (14) se perd à ses extrémités dans le bord du bombement de la paroi d'about (5) présentant un rayon de courbure (R1) inférieur.
  3. Récipient selon la revendication 1, caractérisé en ce que la rainure de rupture (14) se perd à ses extrémités dans une dépression formée dans la paroi du récipient, dans laquelle l'épaisseur de paroi est pratiquement inchangée.
  4. Récipient selon la revendication 3, caractérisé en ce que la dépression est disposée du côté de la portion de surface (16) entourée par la rainure de rupture (14), opposé à la partie de paroi (21) de la paroi d'about bombée (5).
  5. Récipient selon une des revendications 1 à 4, caractérisé en ce que la rainure de rupture (14) présente une section de forme sensiblement trapézoïdale.
  6. Récipient selon une des revendications 1 à 5, caractérisé en ce que la rainure de rupture (14) est disposée sur la paroi d'about (5) portant le raccord (6).
EP88115536A 1987-11-08 1988-09-22 Récipient à protection incorporée contre la surpression Expired - Lifetime EP0318657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737977 1987-11-08
DE19873737977 DE3737977A1 (de) 1987-11-08 1987-11-08 Behaelter mit integrierter ueberdrucksicherung

Publications (2)

Publication Number Publication Date
EP0318657A1 EP0318657A1 (fr) 1989-06-07
EP0318657B1 true EP0318657B1 (fr) 1992-04-22

Family

ID=6340099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115536A Expired - Lifetime EP0318657B1 (fr) 1987-11-08 1988-09-22 Récipient à protection incorporée contre la surpression

Country Status (2)

Country Link
EP (1) EP0318657B1 (fr)
DE (2) DE3737977A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9303113U1 (de) * 1993-03-05 1994-04-14 Schäfer Werke GmbH, 57290 Neunkirchen Druckbelastbarer Metallbehälter
DE4437748C2 (de) * 1994-09-20 1996-07-04 Schuetz Werke Gmbh Co Kg Verfahren zum Rekonditionieren von genormten Spundfässern aus Kunststoff
DE20115158U1 (de) * 2001-09-14 2002-02-14 Schäfer Werke GmbH, 57290 Neunkirchen Getränke-Ausschankeinrichtung
FR2875765B1 (fr) * 2004-09-30 2008-10-10 Peugeot Citroen Automobiles Sa Dispositif de protection d'un reservoir d'eau de lavage des elements vitres d'un vehicule automobile
DE102010044338B4 (de) 2009-09-08 2023-05-04 SCHäFER WERKE GMBH Behälter mit einer Sicherheitsberststelle
DE102012106643B8 (de) * 2012-07-23 2014-03-27 Progress-Werk Oberkirch Ag Verfahren zum Herstellen eines Druckbehälters sowie derartiger Druckbehälter
US8939314B1 (en) 2013-07-30 2015-01-27 Progress-Werk-Oberkirch AG Method for producing a pressure vessel and pressure vessel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533406A1 (de) * 1985-08-23 1987-03-05 Schaefer Werke Gmbh Druckfester metallbehaelter zur aufnahme von fluessigkeiten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT52598B (de) * 1910-12-05 1912-03-11 Berlin Anhaltische Maschb Ag Tank für feuergefährliche Flüssigkeiten.
GB1007594A (en) * 1961-03-24 1965-10-13 Grundy Teddington Ltd Improvements in metal casks and like containers and methods of making same
US3484817A (en) * 1967-11-07 1969-12-16 Black Swalls & Bryson Inc Safety pressure relief device
US4416388A (en) * 1982-09-20 1983-11-22 Sexton Can Company, Inc. Pressure relief device
US4610370A (en) * 1985-12-30 1986-09-09 Amoco Corporation Pressure release vent

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533406A1 (de) * 1985-08-23 1987-03-05 Schaefer Werke Gmbh Druckfester metallbehaelter zur aufnahme von fluessigkeiten

Also Published As

Publication number Publication date
DE3737977A1 (de) 1989-05-24
DE3870416D1 (de) 1992-05-27
EP0318657A1 (fr) 1989-06-07
DE3737977C2 (fr) 1991-12-05

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