EP2581326B1 - Film bag inner liner for steel tank - Google Patents

Film bag inner liner for steel tank Download PDF

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Publication number
EP2581326B1
EP2581326B1 EP11184782.8A EP11184782A EP2581326B1 EP 2581326 B1 EP2581326 B1 EP 2581326B1 EP 11184782 A EP11184782 A EP 11184782A EP 2581326 B1 EP2581326 B1 EP 2581326B1
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EP
European Patent Office
Prior art keywords
sack
tank
foil
magnets
opening
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.)
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EP11184782.8A
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German (de)
French (fr)
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EP2581326A1 (en
Inventor
Ralf Pfeiffer
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Afriso Euro Index GmbH
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Afriso Euro Index GmbH
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Priority to EP11184782.8A priority Critical patent/EP2581326B1/en
Publication of EP2581326A1 publication Critical patent/EP2581326A1/en
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Publication of EP2581326B1 publication Critical patent/EP2581326B1/en
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    • 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
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/04—Linings
    • B65D90/046—Flexible liners, e.g. loosely positioned in the container
    • 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
    • B65D2313/00—Connecting or fastening means
    • B65D2313/04—Connecting or fastening means of magnetic type
    • 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
    • B65D2590/00—Component parts, details or accessories for large containers
    • B65D2590/02—Wall construction
    • B65D2590/04—Linings
    • B65D2590/043—Flexible liners
    • B65D2590/046—Bladders

Definitions

  • the present invention relates to a plastic film bag as an inner shell for a liquid tank, with a plurality of externally attached to the film bag in closed pockets magnet, as well as a tank lined with it.
  • Such a plastic film bag is for example by the WO 2010/046790 A1 known.
  • a PVC tank inner shell serves to make double-walled and environmentally safe storage tanks for liquid media that fall under a hazard class and to protect tanks against corrosion.
  • the inner shell is placed in the tank and inflated.
  • a monitoring space is created between the tank wall and the inner shell.
  • the interstitial space is evacuated, thereby securing the inner shell to the tank wall. This vacuum is permanently held and monitored with a leak detector.
  • the tank system is considered double-walled and meets the legal requirements for the storage of media that fall under a hazard class, such as water pollutants and flammable liquids.
  • the PVC tank inner shell only serves to store the rainwater and to protect the tank from corrosion.
  • the space between the tank wall and the inner shell is evacuated to keep the inner shell against the tank wall. If such a rainwater tank on a vacuum leak detector is dispensed with, the gap must be evacuated again at certain intervals.
  • WO 2010/046790 A1 is a liquid-tight inner envelope for a liquid tank for the transport of molasses is known, which is first filled in a flowable state.
  • a liner of thermally insulating material namely two layers of durable aluminum foil and an intermediate layer of woven material, wherein the layers are laminated together and the woven material may be polyester or polypropylene. Magnets are sewn into pockets on the liner, ie on the laminate layer. By sewing, the laminate layer is no longer liquid-tight and therefore unsuitable as an inner shell for a liquid tank.
  • a PVC film bag as an inner shell for a liquid tank with several inside the film bag attached magnets known.
  • the magnets are provided on the inner surface of the walls and fixed or embedded in the inner surface of the film bag.
  • the magnetic force is reduced by 2 mm due to the film thickness, and on the other hand there is a risk that the inner film will be damaged during a subsequent manual correction of the magnet position and therefore the film bag is no longer liquid-tight.
  • the film bag consists of a PVC film and the closed pockets are each formed by a piece of film, which is welded at the edge of the film bag.
  • the film bag is magnetically attached to the tank wall to keep the film bag without negative pressure in the tank.
  • magnets are attached to the film bag, which adhere to the tank wall.
  • the installation in the tank is carried out as in the prior art described above, but without complete fleece lining and without negative pressure.
  • the magnets are particularly preferably provided at least in the ceiling area of the film bag, advantageously at least in the upper half or in the two upper thirds of the foil bag. In the lower third of the film bag is always on the tank wall, so that no magnets are required here.
  • the invention also relates, in a further aspect, to a tank having the foil bag formed as above as the inner shell, the magnets of the foil bag adhering to the tank wall.
  • the positioning of the magnets on the tank wall takes place automatically when inflating the inner shell in the tank. If necessary, the position of the magnets or the inner shell must be manually corrected after inflation manually.
  • the magnet-affixed film bag provides an advantageous alternative to conventional internal coating of steel tanks to protect them from corrosion, and allows cost-effective conversion of steel tanks for rainwater harvesting. Unlike conventional, according to the invention neither a complete nonwoven lining of the tank nor a suction line including associated connections are necessary.
  • the magnetic attachment also allows easy and quick installation and disassembly of the foil bag.
  • a fleece lining may be installed between the bottom of the tank and the foil bag, which serves as a step protection.
  • Fig. 1 shows a horizontal cylindrical steel tank 1 (eg length 4 m, diameter 1.60 m) with a top-side tank opening 2.
  • the steel tank 1 is lined with an inner shell in the form of a PVC film bag 3, which introduced through the tank opening 2 into the tank interior was and is fixed by means of magnets 4 on the tank wall, ie on the tank shell side 5 and on the two tank end faces 6 .
  • the magnets 4 may be, for example, NdFeB round magnets with a diameter of 32 mm and a thickness of 7 mm.
  • the foil bag 3 is cylindrically prefabricated in accordance with the steel tank 1, so that the bag opening 7 is provided in the lateral surface 8 of the foil bag 3.
  • the magnets 4 are provided both on the upper cylinder jacket half and on the two cylinder end faces 9 of the film bag 3.
  • the magnets 4 are mounted on the lateral surface 8 from the vertex to the lower third of the foil bag 3 at a distance of about 1m to the length and the circumference.
  • the foil bag 3 has no magnets, since here the foil bag 3 always bears against the tank wall.
  • three magnets 4 are vertically one above the other, namely, top, middle, bottom, attached.
  • the magnets 4 are, as in Fig. 2 shown on the outside of the foil bag 3 arranged in closed plastic bags 10 and welded therein. For this purpose, the magnets 4 are placed on the outside of the foil bag 3 and placed over each a piece of film 11 , which is then welded to the edge of the film bag 3 to the film pocket 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

The sack (3) has neodymium magnets (4) fastened at the sack and provided in a ceiling region of the sack in an upwardly aligned sack aperture (7). The sack aperture is provided in an outer surface of the sack. The magnets are provided at cylinder front ends (9) and the upper cylinder circumference half of the sack in the aperture. The magnets are arranged at an outer side at the sack and welded into the sack. The magnets are arranged in film pockets and glued to the sack, which is used for inside lining of a horizontal cylindrical steel tank (1). The tank is made of ferromagnetic material. An independent claim is also included for a tank.

Description

Die vorliegende Erfindung betrifft einen Kunststoff-Foliensack als Innenhülle für einen Flüssigkeitstank, mit mehreren außenseitig am Foliensack in geschlossenen Taschen befestigten Magneten, sowie auch einen damit ausgekleideten Tank.The present invention relates to a plastic film bag as an inner shell for a liquid tank, with a plurality of externally attached to the film bag in closed pockets magnet, as well as a tank lined with it.

Ein derartiger Kunststoff-Foliensack ist beispielsweise durch die WO 2010/046790 A1 bekannt geworden.Such a plastic film bag is for example by the WO 2010/046790 A1 known.

Eine PVC-Tankinnenhülle dient dazu, Tanks für die Lagerung von flüssigen Medien, die unter eine Gefährdungsklasse fallen, doppelwandig und umweltsicher zu machen und Tanks vor Korrosion zu schützen. Die Innenhülle wird in den Tank eingebracht und aufgeblasen. Durch Anbringen einer druckbeständigen Vliesauskleidung an der Tankwand wird zwischen Tankwand und Innenhülle ein Überwachungsraum geschaffen. Nachdem die Innenhülle aufgeblasen worden ist, wird der Überwachungsraum evakuiert und dadurch die Innenhülle an der Tankwand befestigt. Dieses Vakuum wird mit einem Leckanzeigegerät dauerhaft gehalten und überwacht. Dadurch gilt die Tankanlage als doppelwandig und erfüllt die gesetzlichen Vorgaben für die Lagerung von Medien, die unter eine Gefährdungsklasse fallen, wie wassergefährdende Stoffe und brennbare Flüssigkeiten.A PVC tank inner shell serves to make double-walled and environmentally safe storage tanks for liquid media that fall under a hazard class and to protect tanks against corrosion. The inner shell is placed in the tank and inflated. By attaching a pressure-resistant fleece lining to the tank wall, a monitoring space is created between the tank wall and the inner shell. After the inner shell has been inflated, the interstitial space is evacuated, thereby securing the inner shell to the tank wall. This vacuum is permanently held and monitored with a leak detector. As a result, the tank system is considered double-walled and meets the legal requirements for the storage of media that fall under a hazard class, such as water pollutants and flammable liquids.

Für die Lagerung von Regenwasser oder von anderen flüssigen Medien, die keine Gefährdungsklasse haben, gelten keine gesetzlichen Vorgaben und ist daher keine überwachte Doppelwandigkeit des Tanks notwendig. Bei Lagerung von Regenwasser (kein Trinkwasser) dient die PVC-Tankinnenhülle lediglich dazu, das Regenwasser zu lagern und den Tank vor Korrosion zu schützen. Der zwischen Tankwand und Innenhülle befindliche Zwischenraum wird evakuiert, um die Innenhülle an der Tankwand zu halten. Wenn bei solchen Regenwassertanks auf ein Unterdruck-Leckanzeigegerät verzichtet wird, muss der Zwischenraum in gewissen Zeitabständen erneut evakuiert werden.For the storage of rainwater or other liquid media that have no hazard class, there are no legal requirements and therefore no monitored double-walledness of the tank is necessary. When storing rainwater (no drinking water), the PVC tank inner shell only serves to store the rainwater and to protect the tank from corrosion. The space between the tank wall and the inner shell is evacuated to keep the inner shell against the tank wall. If such a rainwater tank on a vacuum leak detector is dispensed with, the gap must be evacuated again at certain intervals.

Aus der eingangs genannten WO 2010/046790 A1 ist eine flüssigkeitsdichte Innen-hülle für einen Flüssigkeitstank zum Transport von Molasse bekannt, die zunächst in fließfähigem Zustand eingefüllt wird. Bei den beschriebenen Ausführungsbeispielen besteht ein Liner aus thermisch isolierendem Material, nämlich aus zwei Schichten aus strapazierfähiger Aluminiumfolie und einer dazwischenliegenden Schicht aus gewebtem Material, wobei die Schichten zusammenlaminiert sind und das gewebte Material Polyester oder Polypropylen sein kann. Magnete werden in Taschen an den Liner, also an das Schichtenlaminat, angenäht. Durch das Annähen ist das Schichtenlaminat aber nicht mehr flüssigkeitsdicht und daher als Innenhülle für einen Flüssigkeitstank ungeeignet.From the above WO 2010/046790 A1 is a liquid-tight inner envelope for a liquid tank for the transport of molasses is known, which is first filled in a flowable state. In the described embodiments, a liner of thermally insulating material, namely two layers of durable aluminum foil and an intermediate layer of woven material, wherein the layers are laminated together and the woven material may be polyester or polypropylene. Magnets are sewn into pockets on the liner, ie on the laminate layer. By sewing, the laminate layer is no longer liquid-tight and therefore unsuitable as an inner shell for a liquid tank.

Weiterhin ist aus der WO 2007/004216 A2 ein PVC-Foliensack als Innenhülle für einen Flüssigkeitstank mit mehreren innenseitig am Foliensack befestigten Magneten bekannt. Dabei sind die Magnete an der Innenfläche der Wände vorgesehen und in die Innenfläche des Foliensacks befestigt oder eingebettet. Allerdings wird bei Befestigung der Magnete an der Innenfläche des Foliensacks einerseits die Magnetkraft aufgrund der Foliendicke von 2 mm reduziert, und andererseits besteht die Gefahr, dass z.B. bei einer nachträglichen manuellen Korrektur der Magnetposition die Innenfolie beschädigt wird und daher der Foliensack nicht mehr flüssigkeitsdicht ist.Furthermore, from the WO 2007/004216 A2 a PVC film bag as an inner shell for a liquid tank with several inside the film bag attached magnets known. The magnets are provided on the inner surface of the walls and fixed or embedded in the inner surface of the film bag. However, when the magnets are fastened to the inner surface of the film bag, on the one hand the magnetic force is reduced by 2 mm due to the film thickness, and on the other hand there is a risk that the inner film will be damaged during a subsequent manual correction of the magnet position and therefore the film bag is no longer liquid-tight.

Demgegenüber ist es die Aufgabe der vorliegenden Erfindung, einen einfach und schnell montierbaren Foliensack für einen Tank bereitzustellen.In contrast, it is the object of the present invention to provide a simple and quick to install film bag for a tank.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Foliensack aus einer PVC-Folie besteht und die geschlossenen Taschen jeweils durch ein Folienstück gebildet sind, das randseitig mit dem Foliensack verschweißt ist.This object is achieved in that the film bag consists of a PVC film and the closed pockets are each formed by a piece of film, which is welded at the edge of the film bag.

Erfindungsgemäß wird der Foliensack an der Tankwand magnetbefestigt, um den Foliensack ohne Unterdruck im Tank zu halten. Dazu sind am Foliensack Magnete angebracht, die an der Tankwand haften. Der Einbau in den Tank erfolgt wie bei dem oben beschriebenen Stand der Technik, jedoch ohne komplette Vliesauskleidung und ohne Unterdruck.According to the film bag is magnetically attached to the tank wall to keep the film bag without negative pressure in the tank. For this purpose, magnets are attached to the film bag, which adhere to the tank wall. The installation in the tank is carried out as in the prior art described above, but without complete fleece lining and without negative pressure.

Besonders bevorzugt sind bei nach oben ausgerichteter Sacköffnung die Magnete zumindest im Deckenbereich des Foliensacks vorgesehen, vorteilhafterweise zumindest in der oberen Hälfte oder in den beiden oberen Dritteln des Foliensacks. Im unteren Drittel liegt der Foliensack stets an der Tankwand an, so dass hier keine Magnete erforderlich sind.When the bag opening is oriented upwards, the magnets are particularly preferably provided at least in the ceiling area of the film bag, advantageously at least in the upper half or in the two upper thirds of the foil bag. In the lower third of the film bag is always on the tank wall, so that no magnets are required here.

Die Erfindung betrifft in einem weiteren Aspekt auch einen Tank mit dem wie oben ausgebildeten Foliensack als Innenhülle, wobei die Magnete des Foliensacks an der Tankwand haften. Die Positionierung der Magnete an der Tankwand erfolgt automatisch beim Aufblasen der Innenhülle im Tank. Gegebenenfalls muss die Position der Magnete bzw. die Innenhülle nach dem Aufblasen manuell noch leicht korrigiert werden. Durch Auskleiden mit dem magnetbefestigten Foliensack können Stahltanks dauerhaft vor Korrosion geschützt und für die Lagerung von Regenwasser genutzt werden. Durch Auskleiden mit dem magnetbefestigten Foliensack können schon korrodierte Tanks oder bisher für andere Flüssigkeiten (z.B. Heizöl) genutzte Tanks saniert und/oder für die Lagerung von anderen Flüssigkeiten (z.B. Regenwasser) genutzt werden.The invention also relates, in a further aspect, to a tank having the foil bag formed as above as the inner shell, the magnets of the foil bag adhering to the tank wall. The positioning of the magnets on the tank wall takes place automatically when inflating the inner shell in the tank. If necessary, the position of the magnets or the inner shell must be manually corrected after inflation manually. By lining with the magnet-fixed foil bag steel tanks can be permanently protected against corrosion and used for the storage of rainwater. By lining with the magnetically-affixed film bag, corroded tanks or tanks previously used for other liquids (e.g., heating oil) can be rehabilitated and / or used for the storage of other liquids (e.g., rainwater).

Der magnetbefestigte Foliensack stellt eine vorteilhafte Alternative zur herkömmlichen Innenbeschichtung von Stahltanks dar, um diese vor Korrosion zu schützen, und ermöglicht ein kostengünstiges Umrüsten von Stahltanks zur Regenwassernutzung. Anders als herkömmlich sind erfindungsgemäß weder eine komplette Vliesauskleidung des Tanks noch eine Saugleitung samt zugehörigen Anschlüsse notwendig. Die Magnetbefestigung ermöglicht zudem eine einfache und schnelle Montage und auch Demontage des Foliensacks.The magnet-affixed film bag provides an advantageous alternative to conventional internal coating of steel tanks to protect them from corrosion, and allows cost-effective conversion of steel tanks for rainwater harvesting. Unlike conventional, according to the invention neither a complete nonwoven lining of the tank nor a suction line including associated connections are necessary. The magnetic attachment also allows easy and quick installation and disassembly of the foil bag.

Erforderlichenfalls kann zwischen Tankboden und Foliensack eine Vliesauskleidung verlegt sein, die als Trittschutz dient.If necessary, a fleece lining may be installed between the bottom of the tank and the foil bag, which serves as a step protection.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar. Ebenso können die vorstehend genannten und die noch weiter aufgeführten Merkmale je für sich oder zu mehreren in beliebigen Kombinationen Verwendung finden. Die gezeigten und beschriebenen Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter für die Schilderung der Erfindung.Further advantages and advantageous embodiments of the subject invention are the description, the drawings and claims removed. Likewise, the features mentioned above and the features listed further can be used individually or in combination in any combination. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.

Es zeigen:

Fig. 1
einen Stahltank mit dem erfindungsgemäßen magnetbefestigten Foliensack als Innenhülle; und
Fig. 2
eine Detailansicht des Foliensacks im Bereich eines der in Fig. 1 gezeigten, auf den Foliensack in Folientaschen eingeschweißten Magnete.
Show it:
Fig. 1
a steel tank with the magnetically fixed film bag according to the invention as an inner shell; and
Fig. 2
a detailed view of the foil bag in the area of one of Fig. 1 shown on the foil bag in foil pockets welded magnets.

Fig. 1 zeigt einen horizontal liegenden zylinderförmigen Stahltank 1 (z.B. Länge 4 m, Durchmesser 1,60 m) mit einer oberseitigen Tanköffnung 2. Der Stahltank 1 ist mit einer Innenhülle in Form eines PVC-Foliensacks 3 ausgekleidet, der durch die Tanköffnung 2 in das Tankinnere eingebracht wurde und mittels Magneten 4 an der Tankwand, also an der Tankmantelseite 5 und an den beiden Tankstirnseiten 6, befestigt ist. Die Magnete 4 können beispielsweise NdFeB-Rundmagnete mit einem Durchmesser von 32 mm und einer Dicke von 7 mm sein. Fig. 1 shows a horizontal cylindrical steel tank 1 (eg length 4 m, diameter 1.60 m) with a top-side tank opening 2. The steel tank 1 is lined with an inner shell in the form of a PVC film bag 3, which introduced through the tank opening 2 into the tank interior was and is fixed by means of magnets 4 on the tank wall, ie on the tank shell side 5 and on the two tank end faces 6 . The magnets 4 may be, for example, NdFeB round magnets with a diameter of 32 mm and a thickness of 7 mm.

Der Foliensack 3 ist entsprechend dem Stahltank 1 zylinderförmig vorkonfektioniert, so dass die Sacköffnung 7 in der Mantelfläche 8 des Foliensacks 3 vorgesehen ist. Bei nach oben ausgerichteter Sacköffnung 7 sind die Magnete 4 sowohl an der oberen Zylindermantelhälfte als auch an den beiden Zylinderstirnseiten 9 des Foliensacks 3 vorgesehen. Im gezeigten Ausführungsbeispiel sind die Magnete 4 an der Mantelfläche 8 vom Scheitel bis zum unteren Drittel des Foliensacks 3 im Abstand von ca. 1m auf die Länge und den Umfang angebracht. Im unteren Drittel, also im Bodenbereich, weist der Foliensack 3 keine Magnete auf, da hier der Foliensack 3 stets an der Tankwand anliegt. An den beiden Zylinderstirnseiten 9 sind drei Magnete 4 vertikal übereinander, nämlich oben, mittig, unten, angebracht.The foil bag 3 is cylindrically prefabricated in accordance with the steel tank 1, so that the bag opening 7 is provided in the lateral surface 8 of the foil bag 3. When the bag opening 7 is oriented upwards, the magnets 4 are provided both on the upper cylinder jacket half and on the two cylinder end faces 9 of the film bag 3. In the illustrated embodiment, the magnets 4 are mounted on the lateral surface 8 from the vertex to the lower third of the foil bag 3 at a distance of about 1m to the length and the circumference. In the lower third, ie in the bottom area, the foil bag 3 has no magnets, since here the foil bag 3 always bears against the tank wall. At the two cylinder end faces 9, three magnets 4 are vertically one above the other, namely, top, middle, bottom, attached.

Die Magnete 4 sind, wie in Fig. 2 gezeigt, außenseitig am Foliensack 3 in geschlossenen Folientaschen 10 angeordnet und darin eingeschweißt. Dazu werden die Magnete 4 auf die Außenseite des Foliensacks 3 gelegt und darüber jeweils ein Folienstück 11 aufgelegt, das dann randseitig mit dem Foliensack 3 zu der Folientasche 10 verschweißt wird.The magnets 4 are, as in Fig. 2 shown on the outside of the foil bag 3 arranged in closed plastic bags 10 and welded therein. For this purpose, the magnets 4 are placed on the outside of the foil bag 3 and placed over each a piece of film 11 , which is then welded to the edge of the film bag 3 to the film pocket 10.

Die Positionierung der Magnete 4 an der Tankwand 5, 6 erfolgt automatisch beim Aufblasen des Foliensack 3 im Stahltank 1. Im Bodenbereich, also zwischen Tankboden 12 und Foliensack 3, ist eine Vliesauskleidung 13 verlegt, die als Trittschutz dient.The positioning of the magnets 4 on the tank wall 5, 6 takes place automatically when inflating the foil bag 3 in the steel tank 1. In the bottom area, ie between tank bottom 12 and foil bag 3, a fleece lining 13 is laid, which serves as kick protection.

Claims (6)

  1. Foil sack (3) of plastic material as inner liner for a liquid tank (1) comprising several magnets (4) that are attached to the outside of the foil sack (3) in closed pockets (10), characterized in that the foil sack (3) consists of a PVC foil and each closed pocket (10) is formed by a piece of foil (11) whose edge is welded to the foil sack (3).
  2. Foil sack according to claim 1, characterized in that, when the sack opening (7) is aligned in an upward direction, the magnets (4) are provided at least in a ceiling area of the foil sack (3) that surrounds the sack opening (7).
  3. Foil sack according to any one of the preceding claims, characterized in that, when the sack opening (7) is aligned in an upward direction, the magnets (4) are provided at least in the upper half, in particular, at least in the two upper thirds of the foil sack (3).
  4. Foil sack according to any one of the preceding claims, characterized in that the sack opening (7) is provided in the lateral area of a cylindrical foil sack (3) and, when the sack opening (7) is aligned in an upward direction, the magnets (4) are provided on the two cylinder front faces (9) and at least on the upper half of the cylinder circumference of the foil sack (3).
  5. Tank (1) of ferromagnetic material, in particular, a steel tank, comprising a tank opening (2) on the upper side, and comprising a foil sack (3) that lines the inside of the tank (1) according to any one of the preceding claims, wherein the magnets (4) of the foil sack (3) adhere to the tank wall (5, 6).
  6. Tank according to claim 5, characterized in that a liner of non-woven material (13) is placed between tank bottom (12) and foil sack (3) as impact protection.
EP11184782.8A 2011-10-12 2011-10-12 Film bag inner liner for steel tank Active EP2581326B1 (en)

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EP2581326B1 true EP2581326B1 (en) 2013-12-18

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Publication number Priority date Publication date Assignee Title
US9526309B2 (en) * 2013-04-29 2016-12-27 George-Michael Huyke-Phillips Magnetized liner for storage and holding bags
DE202021101418U1 (en) 2021-03-19 2021-03-26 W + H Tankschutz Gmbh Inner lining for a tank

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Publication number Priority date Publication date Assignee Title
DE2601094A1 (en) * 1976-01-14 1977-07-21 Mierau Albert Plastic lined pressurised water tank - has porous plastics blanket vacuum formed to tank metal beneath plastics lining
IL169519A (en) * 2005-07-04 2011-08-31 Terrasafe Environmental Prot Ltd Internal container
GB0819482D0 (en) * 2008-10-23 2008-12-03 Trans Ocean Distrib Ltd Thermal insulation of shipping containers

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