EP0686120B1 - Recipient en metal pouvant supporter une surpression interne - Google Patents

Recipient en metal pouvant supporter une surpression interne Download PDF

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Publication number
EP0686120B1
EP0686120B1 EP94909025A EP94909025A EP0686120B1 EP 0686120 B1 EP0686120 B1 EP 0686120B1 EP 94909025 A EP94909025 A EP 94909025A EP 94909025 A EP94909025 A EP 94909025A EP 0686120 B1 EP0686120 B1 EP 0686120B1
Authority
EP
European Patent Office
Prior art keywords
notch
breaking point
recess
predetermined breaking
container
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
EP94909025A
Other languages
German (de)
English (en)
Other versions
EP0686120A1 (fr
Inventor
Bernd Schrepfer
Hans-Helmut Reichmann
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.)
Schaefer Werke GmbH
Original Assignee
Schaefer Werke 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 Schaefer Werke GmbH filed Critical Schaefer Werke GmbH
Publication of EP0686120A1 publication Critical patent/EP0686120A1/fr
Application granted granted Critical
Publication of EP0686120B1 publication Critical patent/EP0686120B1/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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/34—Coverings or external coatings
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/01—Beer barrels

Definitions

  • the invention relates to a container made of metal, which is resilient due to internal overpressure and the hollow body which holds the filling material consists of a substantially cylindrical jacket and two outwardly curved end bottoms, at least one of the end bottoms having a shape, preferably as a so-called bottom cup protrudes from the floor arch, at least one container connection piece is provided, which is preferably seated in the formation or floor cup, and in at least one of the end floors a predetermined breaking point is integrated, which consists of a notch formed on the outside thereof.
  • Such containers are mainly used for the transport and storage of liquids and are mainly used in the beverage industry for the reception of beer or non-alcoholic beverages. They are intended for operating pressures which are usually between 0 and 7 bar overpressure.
  • These containers are either only equipped with stand or grip rings made of metal, plastic or rubber, or they are provided with a complete casing made of these materials, which then forms the stand and grip ring, but also covers the cylindrical casing of the container.
  • the containers of this type are increasingly being equipped with an integrated overpressure protection, which is even prescribed by the authorities for certain applications.
  • the overpressure protection is intended to prevent improper handling of the container as well as incorrect operation or malfunction pressure reducers, the internal pressure of the container can rise to very high values until it bursts. In other words: at a defined pressure distance from the maximum burst pressure of the container, the resulting excess pressure should be derived safely by automatically opening the predetermined breaking point in the container wall.
  • this predetermined breaking point is provided as a defined weakening at various points on the container wall, preferably in the form of a notch, as has already been mentioned above.
  • this predetermined breaking point designed as a notch it must be noted that the remaining residual thickness of the container wall is selected so large that it is still technically manageable on the one hand, but on the other hand the service life of the container is not reduced under operating conditions.
  • a container of this type has a predetermined breaking point in the floor cup, the opening pressure of which is approximately 50 to 70% of the bursting pressure of a container without a predetermined breaking point.
  • the technically manageable minimum remaining thickness of the container wall without affecting the operational fatigue strength of the container is around 25 to 30% of the normal surrounding wall thickness.
  • DE-OS 35 33 406 already starts from a container which has a metal inner bladder and a plastic sheath firmly connected to it and in which the predetermined breaking point also fulfills its function in the encased form.
  • the response pressure the influence of the plastic sheathing, which increases the predetermined breaking point, is relatively small in this case with 50 to 70% of the container bursting pressure, especially since the thickness of the sheathing is made as small as possible solely for reasons of material costs in the area of the floor cup.
  • the plastic coating has the advantage that corrosion influence (crevice corrosion) on the predetermined breaking point designed as a mechanically introduced notch as well as mechanical damage are prevented and that undesired manipulations at the predetermined breaking point which is not visible from the outside are practically excluded.
  • DE-OS 37 37 977 a container is also known in which a predetermined breaking point is intended to derive the impermissible excess pressure, which is arranged in the transition region of the curvature of an end base to the cylindrical container wall, that is to say in the region of the so-called base brim.
  • the response pressure of the predetermined breaking point is still around 60 to 70% of the bursting pressure of a container without a predetermined breaking point if the minimum remaining thickness in the area of the predetermined breaking point notch is still a technically manageable size of at least 20 to 25% of the initial wall thickness and the predetermined breaking point is also should have sufficient alternating pressure strength for the normal operating pressures of the container.
  • DE-OS 37 37 977 is basically based on an unclad container, i.e.
  • the response pressure increases by at least about 5 to 10 bar depending on the type and shape of the cover. Naturally, this pressure increase is directly dependent on the stability or the thickness of the cover.
  • a predetermined breaking point has a certain residual risk that you can break due to a material or production defect before the predetermined breaking point has taken over its safety function.
  • This residual risk increases as a direct function of the ratio of the response pressure of the predetermined breaking point to the nominal burst pressure of the container. Ie, the higher the response pressure of the predetermined breaking point, the greater the existing residual risk.
  • the invention is based on the object to further reduce the risk described above and for certain applications of the container to create an integrated in a bottom and designed as a notch predetermined breaking point, the response pressure is about 25% of the nominal burst pressure of a container without a predetermined breaking point, which but still has a technically controllable residual metal thickness of about 25% of the thickness of the surrounding metal wall surface and at which the maximum burst pressure is maintained even if the predetermined breaking point is covered by a sheathing or by stand or grip rings made of plastic or rubber is.
  • this complex task is fundamentally achieved in that the notch of the predetermined breaking point has different depths and at the same time has its maximum depth in that region of the end floor which, when subjected to a defined, exceeds the permissible operating pressure internal compression is subject to the greatest deformation.
  • the maximum depth of the notch is in the range of the maximum expansion of the end base and the position of the notch is arranged transversely to the direction of the maximum expansion of the end base.
  • the predetermined breaking point can be arranged both in the upper and in the lower end floor.
  • the response pressure is independent of this.
  • it can be an advantage to arrange the predetermined breaking point in the upper floor, because in the case of the standing positioning of the container when the predetermined breaking point responds, the pressure reduction via the compressed gas, which is generally located at the top, takes place faster than by pushing out the liquid in the container via a Breakage point in the lower end floor.
  • the predetermined breaking point opens with a residual metal thickness of 0.2 mm in the area of the notch and with a plastic coating at an overpressure of maximum 25 bar, this container without a predetermined breaking point has a burst pressure of 95 to 100 bar.
  • the casing also experiences a maximum expansion at this point and thus has the least influence on the increase in the opening pressure of the predetermined breaking point.
  • This effect is reinforced by the fact that the smallest wall thickness of the sheathing of the end floor is also located in this area.
  • the predetermined breaking point in the form of a notch is preferably produced using a cutting, rotating tool. However, it can also be removed by e.g. a laser device can be achieved.
  • the annularly closed notch preferably has opposite regions of different depths.
  • the surface area wholly or partially enclosed by the notch preferably has a diameter of approximately 15 to 25 mm.
  • the notches produced by laser processing or in some other way can also have other geometric shapes. E.g. they can enclose a partial circle with a circumference of 240 to 300 ° and also consist of a notch of constant depth. In any case, however, the notch should have a shape which, after opening the predetermined breaking point, does not tend to conduct the crack in the base of the notch over the edge of the notch into the end floor wall surface. This prevents the risk of the end floor tearing open.
  • the base cup of one or each end base is usually formed by a shape arranged centrally in the base arch. That is, the notch of the predetermined breaking point assigned to it is located at its maximum depth about the radius of the formation from the center of this base curvature.
  • Fig. 1 a trained as a beverage container 1 and resilient by internal pressure is shown, which consists of a thin-walled inner container made of metal, which is completely equipped with a casing 3 made of a partially foamed plastic.
  • the inner container 2 consists of two deep-drawn half-shells 2a and 2b, which are connected to one another by a central weld 4, and of a connecting sleeve 5.
  • the two half-shells 2a and 2b have an upper end plate 6a and a lower end plate 6b, each of which consists of there is a partial spherical surface 7a or 7b and a shape arranged centrally therein and designed as a so-called base cup 8a or 8b.
  • the formations 8a and 8b protrude outward from the envelope of the partial spherical surfaces 7a and 7b out and usually have a central flat surface 9a or 9b.
  • the connecting sleeve 5 is inserted into the surface 9a of the formation 8a in the upper end base 6a.
  • a predetermined breaking point designed as an annular notch 10 is arranged in the partial spherical surface 7a of the upper end base 6a near the transition 11 to the upper formation 8a. At this point, the area of greatest elongation of this end base 6a is located under the action of an internal pressure load on the inner container 2.
  • the partial spherical surface 7a in the vicinity of the transition region 11 to the base cup 8a has undergone a maximum of elongation and thus such an increase in tension that the predetermined breaking point has already opened in region 12 of the smallest remaining thickness of the notch or else at one still further pressure increase will occur.
  • the relatively thin-walled part of the casing 3 also breaks open after a slight increase in pressure , which covers the notch 10.
  • the predetermined breaking point which is thus fully open, can then safely release the excess pressure.
  • the lowest point 12 of the notch 10 is diametrically opposite the highest point 14. If the notch 10 is introduced by a rotating tool, it has proven to be advantageous to use this tool in such a way that, with a notch diameter D between 15 and 25 mm, the deviation ⁇ of the tool axis from the perpendicular to the wall surface 13 is approximately 1.0 to 1 Is 5 °.
  • the notch forming it extends in the area of the maximum expansion of the end base 6a transversely to the direction of this maximum expansion, so that it there at the point of its maximum depth 12 when the defined one is exceeded internal pressure in container 1 tears open.
  • the notch 10 has a circular shape, as can be seen in FIG. 2 of the drawing, with a maximum depth 12 of approximately 75% and a minimum depth 14 of approximately 25% of the normal thickness S of the surrounding wall surface 13 has.
  • the notch 10 of the predetermined breaking point for example by laser processing, is made as part of a circle with a circumferential angle between 240 to 300 °, then it is important to place the notch 10 on the partial spherical surface 7a or 7b of the end base 6a or 6b to apply that the bisector of this circumferential angle forms a tangent to a concentric circle on the partial spherical surface 7a or 7b of the end base 6a or 6b. In this case in particular, the notch 10 can then also have a constant depth dimension.
  • the notch 10 serving as overpressure protection or predetermined breaking point then naturally comes with its deepest point 12 to lie more or less far from the center of the partial spherical surface 7a in question at the base curvature of the end base 6b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Discharge Heating (AREA)

Claims (8)

  1. Récipient (1) en métal, pouvant résister à une surpression interne, dont le corps creux destiné à recevoir le produit est constitué par une enveloppe essentiellement cylindrique et par deux fonds (6a et 6b) courbés vers l'extérieur, au moins un des deux fonds (6a et 6b) présentant un évidement central (8a et 8b) qui est de préférence en saillie par rapport à la courbure (7a ou 7b) présentée par le fond de manière analogue à une tasse, au moins une tubulure de raccordement (5) du récipient étant prévue de préférence dans l'évidement (8a) ou la tasse et un point de rupture étant intégré dans au moins un des deux fonds (6a et 6b), constitué par une rainure (10) se trouvant sur la face extérieure dudit fond, caractérisé en ce que la rainure (10) du point de rupture présente des profondeurs différentes (12, 14) et en ce que la profondeur maximale (12) se trouve dans la zone du fond (6a) où la déformation sera la plus grande sous l'effet d'une sollicitation provoquée par une pression dépassant la pression de fonctionnement autorisée.
  2. Récipient selon la revendication 1, caractérisé en ce que la profondeur maximale (12) de la rainure (10) est située dans la zone d'allongement maximale du fond (6a ou 6b) et en ce que la position de la rainure (10) est transversale par rapport à la direction de l'allongement maximal du fond (6a ou 6b).
  3. Récipient selon une quelconque des revendications 1 et 2, caractérisé en ce que la profondeur maximale (12) de la rainure (10) dans la surface partiellement sphérique (7a ou 7b) du fond (6a ou 6b) se trouve à proximité immédiate de la zone transition (11) vers l'évidement (8a ou 8b) formant la tasse.
  4. Récipient selon une quelconque des revendications 1 à 3, caractérisé en ce que la rainure (10) est circulaire et une profondeur maximale (12) d'environ 75 % ainsi qu'une profondeur minimale (14) d'environ 25 % de la paroi (13) qui l'entoure.
  5. Récipient selon une quelconque des revendications 1 à 4, caractérisé en ce que la nervure (10) est exécutée sous forme d'un cercle d'un angle périphérique de 240° à 300° et en ce la bissectrice de cet angle périphérique est une tangente par rapport au cercle concentrique sur la face partiellement sphérique (7a ou 7b) du fond (6a ou 6b).
  6. Récipient selon la revendication 5, caractérisé en ce que la rainure (10) est fabriquée à l'aide d'un traitement au Laser et présente une profondeur régulière.
  7. Récipient selon une quelconque des revendications 1 à 6, caractérisé en ce que la tasse est formée par un évidement (8a ou 8b) disposé au centre de la surface partiellement sphérique (7a ou 7b) du fond (6a ou 6b).
  8. Récipient selon une quelconque des revendications 1 à 5, caractérisé en ce que l'évidement (8a ou 8b) est disposé de manière décentrée dans la surface partiellement sphérique (7a ou 7b) du fond (6a ou 6b) et en ce que la rainure (10) de protection contre les surpressions ou point de rupture est prévue avec sa zone la plus profonde (12) à une distance plus ou moins éloignée du centre de la surface partiellement sphérique (7a ou 7b).
EP94909025A 1993-03-05 1994-02-23 Recipient en metal pouvant supporter une surpression interne Expired - Lifetime EP0686120B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9303113U DE9303113U1 (de) 1993-03-05 1993-03-05 Druckbelastbarer Metallbehälter
DE9303113U 1993-03-05
PCT/EP1994/000510 WO1994020375A1 (fr) 1993-03-05 1994-02-23 Recipient en metal pouvant supporter une surpression interne

Publications (2)

Publication Number Publication Date
EP0686120A1 EP0686120A1 (fr) 1995-12-13
EP0686120B1 true EP0686120B1 (fr) 1996-12-18

Family

ID=6890146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94909025A Expired - Lifetime EP0686120B1 (fr) 1993-03-05 1994-02-23 Recipient en metal pouvant supporter une surpression interne

Country Status (8)

Country Link
US (1) US6241116B1 (fr)
EP (1) EP0686120B1 (fr)
JP (1) JPH08507277A (fr)
AT (1) ATE146429T1 (fr)
CA (1) CA2157505A1 (fr)
DE (2) DE9303113U1 (fr)
ES (1) ES2096458T3 (fr)
WO (1) WO1994020375A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044338A1 (de) 2009-09-08 2011-03-10 SCHäFER WERKE GMBH Behälter mit einer Sicherheitsberststelle
EP2505546A1 (fr) 2011-03-30 2012-10-03 Schäfer Werke GmbH Récipient de réception boissons liquides sous pression avec zone cassable de sécurité
DE102012021626A1 (de) 2011-11-08 2013-05-08 SCHäFER WERKE GMBH Behälter, insbesondere Getränkebehälter, mit einer Sicherheitsberststelle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1668525A (zh) * 2001-09-06 2005-09-14 戴维·W·斯图尔特 具有前起拔器的锤子和锤头
US6881345B2 (en) * 2001-10-16 2005-04-19 Macquoid Malcolm Disposable fluid changing kit and method of disposing of the same
US6886711B2 (en) * 2002-08-22 2005-05-03 Samtech Corporation High-pressure tank and method for fabricating the same
RU2393375C2 (ru) * 2008-08-27 2010-06-27 Сергей Владимирович ЛУКЬЯНЕЦ Баллон высокого давления
PL2480815T3 (pl) * 2009-09-22 2013-12-31 Faber Ind Spa Butla gazowa
GB201221141D0 (en) * 2012-11-23 2013-01-09 Petainer Large Container Ip Ltd keg closure with venting mechanism

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US832509A (en) * 1905-09-18 1906-10-02 Leon W Bossert Outlet-box.
US2307043A (en) * 1939-12-05 1943-01-05 American Can Co Container
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
AT322438B (de) * 1972-09-25 1975-05-26 Hoell Metallwarenfab Karl Behälter zur aufnahme von unter druck stehenden medien
US4347942A (en) * 1980-11-24 1982-09-07 Pressure-Pak Container Co., Inc. Pressure relief device and method of fabrication thereof
US4597505A (en) * 1984-04-09 1986-07-01 Continental Disc Corporation Rupture disc with selectively positioned initial buckling
DE3533406A1 (de) * 1985-08-23 1987-03-05 Schaefer Werke Gmbh Druckfester metallbehaelter zur aufnahme von fluessigkeiten
US4722874A (en) * 1986-08-01 1988-02-02 Moli Energy Limited Electrochemical cell pressure relief devices
DE3737977A1 (de) 1987-11-08 1989-05-24 Hoesch Ag Behaelter mit integrierter ueberdrucksicherung
US5063958A (en) * 1991-01-24 1991-11-12 The United States Of Americas As Represented By The Secretary Of The Navy Burst diaphragm sequence valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044338A1 (de) 2009-09-08 2011-03-10 SCHäFER WERKE GMBH Behälter mit einer Sicherheitsberststelle
DE102010044338B4 (de) 2009-09-08 2023-05-04 SCHäFER WERKE GMBH Behälter mit einer Sicherheitsberststelle
EP2505546A1 (fr) 2011-03-30 2012-10-03 Schäfer Werke GmbH Récipient de réception boissons liquides sous pression avec zone cassable de sécurité
DE102011015516A1 (de) 2011-03-30 2012-10-04 SCHäFER WERKE GMBH Behälter zur Aufnahme von unter Druck stehenden Getränkeflüssigkeiten
DE102012021626A1 (de) 2011-11-08 2013-05-08 SCHäFER WERKE GMBH Behälter, insbesondere Getränkebehälter, mit einer Sicherheitsberststelle

Also Published As

Publication number Publication date
ATE146429T1 (de) 1997-01-15
WO1994020375A1 (fr) 1994-09-15
CA2157505A1 (fr) 1994-09-15
EP0686120A1 (fr) 1995-12-13
JPH08507277A (ja) 1996-08-06
DE9303113U1 (de) 1994-04-14
DE59401341D1 (de) 1997-01-30
ES2096458T3 (es) 1997-03-01
US6241116B1 (en) 2001-06-05

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