EP0519168B1 - Vent valve of a container for the transport of dangerous liquids - Google Patents
Vent valve of a container for the transport of dangerous liquids Download PDFInfo
- Publication number
- EP0519168B1 EP0519168B1 EP92105482A EP92105482A EP0519168B1 EP 0519168 B1 EP0519168 B1 EP 0519168B1 EP 92105482 A EP92105482 A EP 92105482A EP 92105482 A EP92105482 A EP 92105482A EP 0519168 B1 EP0519168 B1 EP 0519168B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- splashproofing
- degassing
- closure
- valve according
- 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
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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
- B65D51/1605—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior
- B65D51/1616—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior by means of a filter
-
- 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
- B65D51/1644—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 the element being a valve
- B65D51/165—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 the element being a valve formed by a slit or narrow opening
Definitions
- the invention relates to a degassing valve in the closure of the filling and emptying opening of a stacking container for the transport of dangerous liquids according to the preamble of claim 1 (EP-A-0 382 146).
- Such containers are usually thin-walled and made of high density polyethylene (HDPE). They have stacking surfaces on the bottom and shoulders, which enable containers of the same type to be stacked one on top of the other up to a height of 3m.
- HDPE high density polyethylene
- EP-A-0 382 146 describes such a container closure, which is in the surface of its closure cap Degassing openings and on the inside of the closure cap has a molded sleeve into which a correspondingly porous sponge body is pressed by an overlapping cover cap. This has a medium, relatively large opening, the sponge body on its side facing this opening has a gas-impermeable film which covers this opening. When the pressure in the container increases, this film is displaced against the action of the sponge body to such an extent that the gas can get into and through this sponge body to the outside.
- such an arrangement does not offer adequate protection against liquid hammer during corresponding container movements, since the liquid can displace this film more strongly and gain access to the sponge body, penetrate it and is conveyed to the outside by the inflowing gas.
- DE-A-36 18 829 describes a degassing valve for a transport container for gas-secreting, in particular powdery goods, in the upper cover of which is formed from a thicker film, a convex inward-facing calotte is formed with an arcuate or straight continuous punched incision.
- This incision should have an opening width of 0.05 to 0.08mm, which is closed by a highly viscous silicone oil in the rest position. With internal pressure, the cut edges open so far that the sealing silicone oil releases the expanding gas.
- this closure is only suitable for such contents, such as light powders, in which no liquid contamination can occur.
- the oil is unsuitable as a sealant for aggressive content liquids.
- the object of the invention is a degassing valve that releases pressures below 0.1 to 0.15 bar, but withholds the liquid content during transportation-related buffing movements, surge loads and liquid hammer down to the smallest amounts and, on the other hand, is simple and cheap to manufacture.
- All parts of the degassing valve according to the invention can be made of polyethylene. You do not need to remove the valve beforehand when recycling the container.
- the closure cap 1 of a transport container for dangerous liquids has a bore 2 as a gas outlet opening, which leads into the interior of a valve sleeve 3 which is open at the bottom.
- a cylindrical sintering plug 4 which consists of very fine-pored, high molecular weight polyethylene, is pressed into this vetil sleeve with a precise peripheral fit.
- a cup-shaped surge protection cap 5 is pushed over the valve sleeve 3 from below and has an inner bead 6 in its wall, which is snapped into a recess 7 running around the valve sleeve 3.
- the surge protection cap 5 has circumferential sealing lips 9 on its inner wall above the inner bead 6, which seal against the outer wall of the valve sleeve 3.
- a continuous incision 10 is provided in the base 11 of the surge protection cap 5, the section plane of which is inclined at an acute angle, preferably 45 °, to the base 11 and extends from wall to wall of the surge protection cap 5. This cut is completely closed due to the elasticity of the material of the bottom 11 in the unloaded state.
- the sealing lips 12 and 13 formed by this slit let the overpressure through, but not the liquid content.
- the bevel of the incision 10 means that the interior of the container faces Surfaces 14 and 15 of the bottom 11 of different sizes.
- the surface 14 is accordingly the larger area of application for the pressure exerted by the liquid surge and is therefore raised more strongly, the protruding lip edge 16 of the surface 14 being pressed in a sealing manner against the sealing lip 12, as shown in FIG. 4. This results in a seal which is sufficient for liquids, but which still has sufficient play for the passage of the compressed gas.
- two fine parallel continuous cuts 17 and 18 are provided in the base 11 of the surge protection cap 5, the sectional plane of which is perpendicular to the level of the base 11 and which completely close in the rest position.
- the web 19 formed between the two cuts 17 and 18 bulges outward and releases narrow crescent-shaped slots which are just gas-permeable but retain the liquid.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Description
Die Erfindung betrifft ein Entgasungsventil im Verschluß der Füll- und Entleerungsöffnung eines Stapelbehälters für den Transport gefährlicher Flüssigkeiten nach dem Oberbegriff des Anspruchs 1 (EP-A-0 382 146). Derartige Behälter sind meist dünnwandig und bestehen aus Polyethylen hoher Dichte (HDPE). Sie weisen an Boden und Schultern Stapelflächen auf, die ein Stapeln gleichartiger Behälter übereinander bis zur Höhe von 3m ermöglichen. Für die Zulassung dieser Behälter zum Bahn-, Straßen- und Lufttransport gefährlicher Flüssigkeiten bestehen nationale und internationale Vorschriften, nach denen die Behälter Entgasungsventile für die von den Inhaltsflüssigkeiten abgesonderten Gase aufweisen müssen, die jedoch ein Austreten der Inhaltsflüssigkeit bei Überkopfstellen der die Ausgußöffnung an ihrer Oberseite aufweisenden Behälter über bestimmte Zeit sowie bei Flüssigkeitsschlägen gegen die Innenseite des Entgasungsventils verhindern. Eine ungenügende Entlastung eines auftretenden Gasdruckes im Behälter führt zu dessen Aufblähen und durch Verlust seiner stapelfähigen Form zum Einsturz eines Stapels aus solchen Behältern und schließlich zum Platzen der Behälter. Das Entgasungsventil muß daher in der Regel bei 0,1 bis 0,15 bar spätestens öffnen und dann einen entsprechenden Querschnitt aufweisen, der einen ausreichenden Gasaustritt auch bei höheren Außentemperaturen zuläßt.The invention relates to a degassing valve in the closure of the filling and emptying opening of a stacking container for the transport of dangerous liquids according to the preamble of claim 1 (EP-A-0 382 146). Such containers are usually thin-walled and made of high density polyethylene (HDPE). They have stacking surfaces on the bottom and shoulders, which enable containers of the same type to be stacked one on top of the other up to a height of 3m. National and international regulations exist for the approval of these containers for the transport of dangerous liquids by rail, road and air, according to which the containers have degassing valves for the gases separated from the contents liquids must, however, prevent the content liquid from escaping for a certain time in the case of overhead locations of the containers having the pouring opening on their top side and in the event of liquid strikes against the inside of the degassing valve. Inadequate relief of a gas pressure occurring in the container leads to its inflation and, due to the loss of its stackable shape, to the collapse of a stack from such containers and finally to the container bursting. The degassing valve must therefore usually open at 0.1 to 0.15 bar at the latest and then have a corresponding cross-section that allows sufficient gas to escape even at higher outside temperatures.
Ein weiteres Erfordernis ist die Unangreifbarkeit des Materials solcher Entgasungsventile durch die oft äusserst aggressiven Inhaltsflüssigkeiten.Another requirement is the invulnerability of the material of such degassing valves due to the often extremely aggressive content liquids.
Das eigentliche Problem solcher Entgasungsventile ist jedoch die Trennung des auszuscheidenden Gases von der Flüssigkeit, deren Austreten durch das Entgasungsventil auch unter extremen Bedingungen wie längerem Überkopfstellen, Stößen, Abstürzen oder Flüssigkeitsschlägen bei stärkeren Beschleunigungen beim Transport verhindert werden soll. Diese Bedingungen konnten bei den bisher bekannten Verschlußventilen nie vollständig erfüllt werden.The real problem of such degassing valves, however, is the separation of the gas to be separated from the liquid, the escape of which is to be prevented by the degassing valve even under extreme conditions such as prolonged overturning, bumps, falls or liquid hammering when the vehicle is accelerated strongly during transport. These conditions could never be fully met with the previously known shut-off valves.
In EP-A-0 382 146 ist ein solcher Behälterverschluß beschrieben, der in der Oberfläche seiner Verschlußkappe Entgasungsöffnungen und auf der Innenseite der Verschlußkappe eine angeformte Hülse aufweist, in die ein entsprechend poröser Schwammkörper durch eine übergreifende Abdeckkappe eingepreßt ist. Diese weist eine mittlere relativ große Öffnung auf, der Schwammkörper an seiner dieser Öffnung zugewandten Seite eine gasundurchlässige Folie, die diese Öffnung abdeckt. Bei Druckanstieg im Behälter wird diese Folie gegen die Wirkung des Schwammkörpers soweit verdrängt, daß das Gas in und durch diesen Schwammkörper nach außen gelangen kann. Eine solche Anordnung bietet aber keinen ausreichenden Schutz gegen Flüssigkeitsschläge bei entsprechenden Behälterbewegungen, da die Flüssigkeit diese Folie stärker verdrängen und Zugang zu dem Schwammkörper erhalten kann, diesen durchdringt und vom nachströmenden Gas nach außen gefördert wird.EP-A-0 382 146 describes such a container closure, which is in the surface of its closure cap Degassing openings and on the inside of the closure cap has a molded sleeve into which a correspondingly porous sponge body is pressed by an overlapping cover cap. This has a medium, relatively large opening, the sponge body on its side facing this opening has a gas-impermeable film which covers this opening. When the pressure in the container increases, this film is displaced against the action of the sponge body to such an extent that the gas can get into and through this sponge body to the outside. However, such an arrangement does not offer adequate protection against liquid hammer during corresponding container movements, since the liquid can displace this film more strongly and gain access to the sponge body, penetrate it and is conveyed to the outside by the inflowing gas.
In DE-A-36 18 829 wird ein Entgasungsventil für einen Transportbehälter für gasabsondernde, insbesondere pulverförmige Güter beschrieben, in dessen aus einer stärkeren Folie gebildeten oberen Abdeckung eine konvex nach innen weisende Kalotte mit einem bogenförmigen oder geraden durchgehenden ausgestanzten Einschnitt ausgebildet ist. Dieser Einschnitt soll eine Öffnungsweite von 0,05 bis 0,08mm haben, die von einem hochviskosen Silikonöl in Ruhelage verschlossen wird. Bei Innendruck öffnen sich die Schnittränder so weit, daß das abdichtende Silikonöl das expandierende Gas freigibt. Dieser Verschluß ist jedoch nur für solche Inhaltsgüter, wie leichte Pulver geeignet, bei denen keine Flüssigkeitsbelastungen auftreten können.DE-A-36 18 829 describes a degassing valve for a transport container for gas-secreting, in particular powdery goods, in the upper cover of which is formed from a thicker film, a convex inward-facing calotte is formed with an arcuate or straight continuous punched incision. This incision should have an opening width of 0.05 to 0.08mm, which is closed by a highly viscous silicone oil in the rest position. With internal pressure, the cut edges open so far that the sealing silicone oil releases the expanding gas. However, this closure is only suitable for such contents, such as light powders, in which no liquid contamination can occur.
Vor allem ist das Öl als Dichtmittel bei aggressiven Inhaltsflüssigkeiten ungeeignet.Above all, the oil is unsuitable as a sealant for aggressive content liquids.
Aufgabe der Erfindung ist ein Entgasungsventil, das Drücke bereits unterhalb 0,1 bis 0,15 bar freigibt, aber die Inhaltsflüssigkeit bei transportbedingten Schwabbelbewegungen, Schwallbelastungen und Flüssigkeitsschlägen bis auf geringste Mengen zurückhält und andererseits in der Herstellung einfach und billig ist.The object of the invention is a degassing valve that releases pressures below 0.1 to 0.15 bar, but withholds the liquid content during transportation-related buffing movements, surge loads and liquid hammer down to the smallest amounts and, on the other hand, is simple and cheap to manufacture.
Die Lösung der Aufgabe ergibt sich aus den Ansprüchen.The solution to the problem arises from the claims.
Alle Teile des erfindungsgemäßen Entgasungsventils können, wie der von ihm verschlossene Behälter selbst, aus Polyethylen gefertigt werden. Das Ventil braucht man dann beim Recycling des Behälters nicht vorher auszubauen.All parts of the degassing valve according to the invention, like the container which it closes itself, can be made of polyethylene. You do not need to remove the valve beforehand when recycling the container.
Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnungen näher erläutert. Diese zeigen in
Figur 1- einen Axialschnitt durch ein erfindungsgemäßes Entgasungsventil;
Figur 2- eine Draufsicht auf das gleiche Ventil in Richtung des Pfeils II in
Figur 1; Figur 3- einen vergrößerten Teilausschnitt aus
Figur 1 in belastetem Zustand; Figur 4- eine Draufsicht wie in
Figur 2 auf eine weitere Ausführungsform.
- Figure 1
- an axial section through a degassing valve according to the invention;
- Figure 2
- a plan view of the same valve in the direction of arrow II in Figure 1;
- Figure 3
- an enlarged partial section of Figure 1 in the loaded state;
- Figure 4
- a plan view as in Figure 2 of a further embodiment.
Die Verschlußkappe 1 eines Transportbehälters für gefährliche Flüssigkeiten weist eine Bohrung 2 als Gasaustrittsöffnung auf, die in den Innenraum einer unten offenen Ventilhülse 3 führt. In dieser Vetilhülse ist mit genauer peripherer Passung ein zylindrischer Sinterpfropfen 4 eingepreßt, der aus sehr feinporigem höchstmolekularem Polyethylen besteht. Über die Ventilhülse 3 ist von unten eine becherförmige Schwallschutzkappe 5 aufgeschoben, die in ihrer Wandung einen Innenwulst 6 aufweist, der in eine an der Ventilhülse 3 umlaufende Ausnehmung 7 eingerastet ist. Die Schwallschutzkappe 5 weist an ihrer Innenwandung oberhalb des Innenwulstes 6 umlaufende Dichtlippen 9 auf, die gegenüber der Aussenwand der Ventilhülse 3 abdichten.The
Ein durchgehender Einschnitt 10 ist im Boden 11 der Schwallschutzkappe 5 vorgesehen, dessen Schnittebene zum Boden 11 um einen spitzen Winkel, vorzugsweise 45° geneigt ist und von Wand zu Wand der Schwallschutzkappe 5 reicht. Dieser Schnitt ist infolge der Elastizität des Materials des Bodens 11 in unbelastetem Zustand vollständig geschlossen. Die von diesem Schlitz gebildeten Dichtlippen 12 und 13 lassen das im Überdruck stehende Ges durch, nicht aber die Inhaltsflüssigkeit. Durch die Schräge des Einschnittes 10 sind die dem Behälterinnenraum zugewandten Oberflächen 14 und 15 des Bodens 11 verschieden groß. Die Fläche 14 ist demnach die größere Beaufschlagungsfläche für den durch Flüssigkeitsschwall ausgeübten Druck und wird daher stärker angehoben, wobei die vorstehende Lippenkante 16 der Fläche 14 an die Dichtlippe 12 dichtend angepreßt wird, wie Figur 4 dies zeigt. Dies ergibt eine für Flüssigkeiten ausreichende Dichtung, die jedoch für den Durchgang des Druckgases noch genügend Spiel aufweist.A
Bei stärkeren Flüssigkeitsschlägen durchtretende Flüssigkeit dringt zwar in Tropfen in den Sinterpfropfen 4 ein, gelangt aber wegen der durch den sehr hohen Grad seiner Feinporigkeit bedingten langen und engen Wege, insbesondere infolge der Hydrophobie des Polyethylens, nicht bis auf die andere Seite des Sinterpfropfens 4.In the event of stronger liquid strikes, liquid penetrates drops into the
Bei der in Figur 5 dargestellten Ausführungsform, die im übrigen der oben beschriebenen gleicht, sind im Boden 11 der Schwallschutzkappe 5 zwei feine parallele durchgehende Schnitte 17 und 18 vorgesehen, deren Schnittebene zur Ebene des Bodens 11 senkrecht liegen und die in Ruhelage vollständig schließen. Bei entsprechendem Innendruck wölbt sich der zwischen den beiden Schnitten 17 und 18 gebildete Steg 19 nach außen und gibt schmale sichelförmige Schlitze frei, die gerade gasdurchlässig sind, die Flüssigkeit aber zurückhalten.In the embodiment shown in FIG. 5, which is otherwise the same as that described above, two fine parallel continuous cuts 17 and 18 are provided in the
- 11
- VerschlußkappeSealing cap
- 22nd
- Bohrung in 1Hole in 1st
- 33rd
- VentilhülseValve sleeve
- 44th
- SinterpfropfenSintering plug
- 55
- SchwallschutzkappeSurge protection cap
- 66
- InnenwulstInner bead
- 77
- umlaufende Ausnehmungcircumferential recess
- 99
- DichtlippenSealing lips
- 1010th
- Einschnitte in 11Incisions in 11
- 1111
-
Boden der Schwallschutzkappe 5Bottom of the
surge protection cap 5 - 12,1312.13
- Dichtlippen zu 10Sealing lips to 10
- 14,1514.15
-
Teile des Bodens 11Parts of the
floor 11 - 1616
- LippenkanteLip edge
- 17,1817.18
- parallele Schnitteparallel cuts
- 1919th
- Stegweb
Claims (5)
- Degassing valve in the closure of the filling and pouring opening of a stackable container for handling dangerous liquids, whose closure cap (1) comprises a degassing opening (2) and, ahead thereof on the inside of said closure cap (1), a valve sleeve (3) for accommodating a gas-permeable filter body (4) pressed therein, which is sealed by a covering cap (5) having one or more openings (10, 17, 18) in its bottom (11) parallel to the surface of said closure cap (1),
characterized in that said filter body is a sintered plug (4) of a very finely porous macromolecular polyethylene, and that said closure cap is a splashproofing cap (5) in whose bottom (11) are provided one or two minute continuous straight cuts (1, 17, 18) which do not intersect and which close in the unloaded condition so as to constitute a tight seal. - Degassing valve according to Claim 1,
characterized in that only one straight cut (10) is provided in said bottom (11) of said splashproofing cap (5), whose cutting plane extends obliquely with respect to the plane of said bottom (11). - Degassing valve according to Claim 1,
characterized in that two substantially parallel straight cuts (17, 18) are provided in said bottom (11) of said splashproofing cap (5), whose cutting plane is normal to the plane of said bottom (11). - Degassing valve according to Claims 1, 2, 3,
characterized in that said valve sleeve (3) presents a peripheral recess (7) and said splashproofing cap (5) includes an interior bead adapted to be engaged into said recess (7). - Degassing valve according to Claims 1, 2, 3, 4, 5,
characterized in that said splashproofing cap (5) presents sealing lips (9) in the region of its upper edge on its inside.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9107432U DE9107432U1 (en) | 1991-06-17 | 1991-06-17 | Degassing valve |
| DE9107432U | 1991-06-17 | ||
| DE9112190U DE9112190U1 (en) | 1991-09-30 | 1991-09-30 | Degassing valve |
| DE9112190U | 1991-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0519168A1 EP0519168A1 (en) | 1992-12-23 |
| EP0519168B1 true EP0519168B1 (en) | 1995-06-07 |
Family
ID=25958300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92105482A Expired - Lifetime EP0519168B1 (en) | 1991-06-17 | 1992-03-30 | Vent valve of a container for the transport of dangerous liquids |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0519168B1 (en) |
| DE (1) | DE59202439D1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1265433B1 (en) * | 1993-12-23 | 1996-11-22 | Luigi Goglio | DEGASATION VALVE FOR AROMATIC PRODUCTS, IN PARTICULAR COFFEE |
| GR2002256Y (en) * | 1998-06-25 | 2000-07-04 | Argo Aeve | Liquid-impermeable and air-permeable caps |
| JP4880239B2 (en) * | 2005-03-28 | 2012-02-22 | 積水成型工業株式会社 | Degassing lid for plastic containers |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB641201A (en) * | 1940-04-25 | 1950-08-09 | Pennsylvania Salt Mfg Co | Improvements in or relating to vented containers |
| US3059799A (en) * | 1960-08-09 | 1962-10-23 | Sealright Oswego Falls Corp | Milk bottle cap |
| US4122943A (en) * | 1976-10-21 | 1978-10-31 | Jules Silver | Valved two compartment dispensing container |
| AU516870B2 (en) * | 1977-01-17 | 1981-06-25 | Creighton Looker & John Louis Marion Edwin | Twopart stopper with venting slit |
| DE8233621U1 (en) * | 1982-11-30 | 1983-02-03 | Rhein-Conti Kunststofftechnik GmbH, 6800 Mannheim | Gas-permeable container closure |
| DE3720939A1 (en) * | 1987-06-25 | 1989-01-05 | Merck Patent Gmbh | DEGASSING CAP FOR LIQUID CONTAINERS |
| DE3903509A1 (en) * | 1989-02-06 | 1990-08-09 | Unilever Nv | CONTAINER CAP WITH INTERNAL PRESSURE LIMITER |
-
1992
- 1992-03-30 DE DE59202439T patent/DE59202439D1/en not_active Expired - Lifetime
- 1992-03-30 EP EP92105482A patent/EP0519168B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0519168A1 (en) | 1992-12-23 |
| DE59202439D1 (en) | 1995-07-13 |
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