EP3468897B1 - Leak prevention film for a fluid tank - Google Patents
Leak prevention film for a fluid tank Download PDFInfo
- Publication number
- EP3468897B1 EP3468897B1 EP17719990.8A EP17719990A EP3468897B1 EP 3468897 B1 EP3468897 B1 EP 3468897B1 EP 17719990 A EP17719990 A EP 17719990A EP 3468897 B1 EP3468897 B1 EP 3468897B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- tank
- ribs
- film
- knobs
- 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.)
- Active
Links
- 239000012530 fluid Substances 0.000 title claims description 25
- 230000002265 prevention Effects 0.000 title 1
- 239000000463 material Substances 0.000 claims description 19
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 230000003746 surface roughness Effects 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/04—Linings
-
- 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
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/24—Spillage-retaining means, e.g. recovery ponds
-
- 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
- B65D90/22—Safety features
- B65D90/46—Arrangements for carrying off, or preventing the formation of electrostatic charges
-
- 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
- B65D90/48—Arrangements of indicating or measuring devices
- B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
-
- 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
- B65D90/48—Arrangements of indicating or measuring devices
- B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
- B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within 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
- 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 leak protection film for lining a fluid tank, which film is made from a flexible, airtight, fluid-resistant material and is adapted to the internal shape of the tank.
- Leakage protection films are generally used to repair leaky fluid tanks or to retrofit single-walled fluid tanks with a double-walled leakage protection system. In the latter case, the airtight, fluid-resistant film is kept spaced from the wall of the tank in order to create a cavity between the film and the tank wall.
- the cavity can be pressurized or underpressure during operation of the tank and monitored for pressure constancy by means of a pressure measuring device. An increase in the overpressure or a decrease in the overpressure detected by the pressure measuring device indicates a leak in the film and / or the tank wall.
- a studded film e.g. made of metal
- an airtight, fluid-resistant cover layer e.g. a glass fiber composite layer.
- the use of nubbed plastic composites or air-permeable nonwovens is known as the spacer layer;
- a variety of airtight, fluid-resistant materials or material composites are used as the top layer, which are often applied in multiple layers.
- a spacer layer must first be applied to the inner wall of the tank, for example in the manner described, or a flexible spacer layer must first be applied to the film and the film, pre-assembled in this way, must be introduced into and into the tank be inflated. This requires additional processing steps and, in the second case, the difficulty of searching for a sufficiently stable and yet flexible spacer layer, which is also to be connected to the film with sufficient durability.
- the aim of the invention is to provide a leak protection film for lining a fluid tank, with which the fluid tank can be lined in a simple process and is then suitable for using a double-wall leak protection monitoring system.
- Such a film is inexpensive, can also be produced with great flexibility and is very durable due to its simple structure.
- the knobs do not run the risk of becoming detached from the rest of the film due to their direct formation from film material. Nevertheless, a secure support of the film on the tank wall and thus the continuity of the cavity are ensured, so that the fluid tank becomes a double-walled tank by lining the leak protection film alone.
- the outside of the film has ribs formed directly from the film material, on which the knobs are formed. With the same compressive strength the film can the film material is made thinner in the troughs that form between the ribs, so that the film becomes much lighter and more flexible overall.
- the ribs in at least two mutually crossing groups are arranged parallel to one another, with a knob being formed at each crossing point, or the ribs are arranged in a honeycomb structure, with a knob being formed at each honeycomb corner point. Both embodiments of the ribs result in a uniformly high compressive strength of the entire film without reducing its flexibility.
- the honeycomb structure enables a particularly material-saving and mechanically particularly stable leak protection film.
- the film including the knobs, preferably has a total thickness of a few tenths of a millimeter to a few millimeters, particularly preferably between one and three millimeters. Films of such total thickness can be flexibly produced from a large number of materials and reduce the tank volume only slightly. Furthermore, films of such thickness are sufficient to form a double-walled tank for a leak protection monitoring system.
- the film has between 70% and 90% of its total thickness on a rib and between 50% and 70% of its total thickness in a trough lying between the ribs.
- knobs are at a mutual distance of a few tenths of a millimeter to a few millimeters, preferably between half a millimeter and about two millimeters. Even a thin, flexible film achieves a consistently high compressive strength. Adjacent knobs can have the same mutual spacing in all directions; for easier production of the film, however, the distances between knobs of the film which are adjacent in different directions are preferably of different sizes. Further This allows the film to be given different flexibility in different directions, especially if the knobs are formed by ribs at the intersection or corner points.
- the film is rough on its inside facing away from the knobs with a roughness depth between 20 ⁇ m and 200 ⁇ m, preferably about 100 ⁇ m.
- a rough inside is easier or more durable to be provided with an optional coating.
- the inside of the film is coated with an electrically conductive cover layer.
- a cover layer if properly grounded, promotes the dissipation of electrostatic charges and thereby reduces the risk of ignition, e.g. when assembly or maintenance personnel enter the tank.
- a large number of flexible natural or plastic materials can be considered as film material, which can be selected depending on the fluid to be taken up by the tank.
- the film material is a polyurethane.
- Polyurethane foils are resistant to petrol, diesel and mineral oil, very flexible, easy to process and durable.
- the film can be inserted into the fluid tank in a collapsed state and can be expanded therein. In this way, the fluid tank can be lined without the need for installation personnel inside the tank.
- FIG. 1 A fluid tank 1 is shown as it is used, for example, as an underground fuel storage container in petrol stations.
- the tank 1 has a tank wall 2 with, for example, the shape of a cuboid, a ball or (here :) a lying cylinder with cambered ends 3, 4 and an opening 5, via which the tank 1 is filled, emptied and / or, if necessary, even entered can.
- Usual installations such as level sensors, ventilation openings, reinforcing webs etc. of tank 1 are in Fig. 1 not shown for clarity.
- the tank 1 is designed to hold liquid or gaseous fuels or other frequently aggressive fluids Fig. 1 lined with a leak protection film 6.
- the film 6 is made of an airtight material that is resistant to the fluids to be absorbed.
- the film 6 - with the exception of the opening 6 - is completely adapted to the inner shape of the tank 1.
- the film 6 For lining a tank, for example when renovating or retrofitting, the film 6 is inserted, for example in a collapsed state, through the opening 5 into the interior of the tank and expanded therein. To expand, the film 6 is inflated inside the tank and / or the space between film 6 and tank wall 2 is evacuated according to a method known to the person skilled in the art. Assembly personnel are not required inside the tank. To insert the film 6 through the opening 5 of an existing one To allow tanks, the material of the film 6 is flexible. The more flexible the film 6, the easier it can be inserted through the opening 5 and expanded inside the tank, but the lower the mechanical strength of the film 6.
- the fluid tank 1 has according to Fig. 1 a continuous cavity 7 between the tank wall 2 and the film 6.
- the tank 1 is thus double-walled, so that a double-wall leak protection monitoring system can be set up if desired or necessary.
- the cavity 7 is put under vacuum (evacuated) or overpressure (pressurized) during operation of the tank 1 and monitored for pressure constancy by means of a pressure measuring device. If an increase in the negative pressure or a drop in the positive pressure is registered, a leak in the tank wall 2 and / or the film 6 is concluded therefrom.
- the film 6 has to according to a first embodiment not shown, on its outer side is to face the tank wall 2 S a knob 8, which are formed directly from the sheet material itself ( “in one piece”).
- the knobs 8 support the film 6 of the tank wall 2 when the tank 1 is fully lined. In this way, said continuous cavity 7 is formed between the tank wall 2 and the film 6 with the aid of the knobs 8.
- the film 6 has formed optional ribs 9 on its outside S a facing the tank wall 2.
- the knobs 8 are formed on the ribs 9, that is to say further from them, so that the film 6 is supported on the tank wall 2 exclusively by the knobs 8, not by the ribs 9, during operation of the tank 1. Between adjacent ribs 9 there are troughs 10 in which the film 6 has its smallest wall thickness w having.
- This smallest wall thickness w on a trough 10 lying between ribs 9 is - in the unloaded state of the film 6 - for example between 50% and 70% of the total thickness d of the film 6; in the area of one of the ribs 9, the wall thickness w 'of the film 6 can be, for example, between 70% and 90% of the total thickness d of the film 6.
- the ribs 9 can, for example, all be arranged parallel and / or interrupted parallel to one another - also in the form of waves or zigzags and thus parallel to one another piece by piece, if desired, in order to be more flexible, for example, at folding points of the collapsed film 6 or at edges in the tank wall 2.
- the ribs 9 in two groups G 1 , G 2 are each arranged parallel to one another, the ribs 9 of one group G 1 crossing those of the other group G 2 .
- a knob 8 is formed, standing out further from these.
- the ribs form 9 parallelograms - in the example the 2a and 2b Rhombuses - in other cases rectangles or squares, with troughs 10 in between and knobs 8 formed at the corner points.
- 3a and 3b The example of 3a and 3b is that the 2a and 2b Similar, but the mutually parallel ribs 9 are arranged in three intersecting groups G 1 , G 2 , G 3 , so that the ribs 9 form triangles - here almost equilateral triangles - with intermediate troughs 10.
- the knobs 8 are again formed at the corner points.
- the ribs 9 can form more than three groups G 1 , G 2 , ..., generally G i , and / or can cross one another in a different way, so that, for example, unlike in the examples shown, they do not form congruent troughs 10.
- Individual ribs 9 or a group G i of parallel ribs 9 could also be formed less strongly, ie less raised, or the ribs 9 could be arranged irregularly at all.
- the ribs 9 of the example of the 4a and 4b are arranged in a honeycomb structure.
- the average Fig. 4b the different wall thicknesses w or w 'of the film 6 in the region of a trough 10 or the ribs 9 can be seen.
- Other honeycomb-like structures for example a sequence of quadrangles and octagons or the like, are alternatively possible.
- the film 6 is made, for example, of a polyurethane or another flexible, airtight, fluid-resistant material. It can have a total thickness d - including the knobs 8 - of a few tenths of a millimeter to a few millimeters, preferably between one and three millimeters.
- the knobs 8 also have a mutual spacing a of a few tenths of a millimeter to a few millimeters, preferably between half and about two millimeters, the distances a between knobs 8 adjacent to one another in different directions being generally of different sizes due to their structuring .
- the cross section of the knobs 8 can be round or - as in the examples shown - oval, but can also have a different shape.
- the film 6 can be smooth or rough on its inside S i facing away from the knobs 8 and in the latter case has, for example, a roughness depth, ie a difference between the maximum and minimum surface heights, between 20 ⁇ m and 200 ⁇ m, preferably about 100 ⁇ m.
- the film 6 is further provided on its inside S i with an electrically conductive cover layer 11 ( Fig. 4b ), for example a metal foil, an electrical conductive paste or the like, coated.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
Die vorliegende Erfindung betrifft eine Leckschutzfolie zum Auskleiden eines Fluidtanks, welche Folie aus einem flexiblen, luftdichten, fluid-resistenten Material gefertigt und an die Innenform des Tanks angepasst ist.The present invention relates to a leak protection film for lining a fluid tank, which film is made from a flexible, airtight, fluid-resistant material and is adapted to the internal shape of the tank.
Im Allgemeinen werden Leckschutzfolien zum Sanieren von undichten Fluidtanks oder zum Nachrüsten von einwandigen Fluidtanks mit einem Doppelwand-Leckschutzüberwachungssystem verwendet. Im letzteren Fall wird die luftdichte, fluid-resistente Folie von der Wandung des Tanks beabstandet gehalten, um zwischen Folie und Tankwandung einen Hohlraum zu erzeugen. Der Hohlraum kann im Betrieb des Tanks unter Unterdruck oder Überdruck gesetzt und mittels einer Druckmesseinrichtung auf Drucckonstanz überwacht werden. Ein von der Druckmesseinrichtung detektiertes Ansteigen des Überdrucks bzw. Abfallen des Überdrucks deutet auf ein Leck in der Folie und/oder der Tankwandung hin.Leakage protection films are generally used to repair leaky fluid tanks or to retrofit single-walled fluid tanks with a double-walled leakage protection system. In the latter case, the airtight, fluid-resistant film is kept spaced from the wall of the tank in order to create a cavity between the film and the tank wall. The cavity can be pressurized or underpressure during operation of the tank and monitored for pressure constancy by means of a pressure measuring device. An increase in the overpressure or a decrease in the overpressure detected by the pressure measuring device indicates a leak in the film and / or the tank wall.
Zu diesem Zweck ist es, z.B. aus der
Um das zeitraubende und gefährliche Arbeiten beim Aufbringen der Tankauskleidung zu vereinfachen, wurde vorgeschlagen, bereits vorkonfektionierte, an die Innenform des auszukleidenden Fluidtanks angepasste, aufblasbare Leckschutzfolien in drucklosem Zustand in den Tank einzuführen und anschließend darin aufzublasen, siehe beispielsweise die
Die Erfindung setzt sich zum Ziel, eine Leckschutzfolie zum Auskleiden eines Fluidtanks zu schaffen, mit welcher der Fluidtank in einem einfachen Verfahren ausgekleidet werden kann und danach zur Verwendung eines Doppelwand-Leckschutzüberwachungssystem geeignet ist.The aim of the invention is to provide a leak protection film for lining a fluid tank, with which the fluid tank can be lined in a simple process and is then suitable for using a double-wall leak protection monitoring system.
Dieses Ziel wird gemäß der Erfindung mit einer Leckschutzfolie gemäß Anspruch 1 erreicht.This aim is achieved according to the invention with a leak protection film according to
Eine derartige Folie ist kostengünstig, auch in hoher Flexibilität herstellbar und aufgrund des einfachen Aufbaus sehr haltbar. Die Noppen laufen aufgrund ihrer direkten Ausformung aus Folienmaterial nicht Gefahr, sich vom Rest der Folie abzulösen. Dennoch sind eine sichere Abstützung der Folie an der Tankwandung und damit die Durchgängigkeit des Hohlraums sichergestellt, sodass der Fluidtank durch Auskleiden alleine mit der genannten Leckschutzfolie zum Doppelwandtank wird.Such a film is inexpensive, can also be produced with great flexibility and is very durable due to its simple structure. The knobs do not run the risk of becoming detached from the rest of the film due to their direct formation from film material. Nevertheless, a secure support of the film on the tank wall and thus the continuity of the cavity are ensured, so that the fluid tank becomes a double-walled tank by lining the leak protection film alone.
Dabei hat die Folie an ihrer Außenseite direkt aus dem Folienmaterial ausgeformte Rippen, an welchen die Noppen ausgeformt sind. Bei gleicher Druckfestigkeit der Folie kann dadurch das Folienmaterial in zwischen den Rippen sich ausbildenden Mulden dünner ausgeführt werden, sodass die Folie in Summe wesentlich leichter und flexibler wird.The outside of the film has ribs formed directly from the film material, on which the knobs are formed. With the same compressive strength the film can the film material is made thinner in the troughs that form between the ribs, so that the film becomes much lighter and more flexible overall.
Ferner sind entweder die Rippen in zumindest zwei einander kreuzenden Gruppen jeweils zueinander parallel angeordnet, wobei an jedem Kreuzungspunkt eine Noppe ausgeformt ist, oder sind die Rippen in Wabenstruktur angeordnet, wobei an jedem Wabeneckpunkt eine Noppe ausgeformt ist. Beide Ausführungsformen der Rippen bewirken eine gleichmäßig hohe Druckfestigkeit der gesamten Folie, ohne dabei ihre Flexibilität zu reduzieren. Die Wabenstruktur ermöglicht eine besonders materialsparende und dabei mechanisch besonders stabile Leckschutzfolie.Furthermore, either the ribs in at least two mutually crossing groups are arranged parallel to one another, with a knob being formed at each crossing point, or the ribs are arranged in a honeycomb structure, with a knob being formed at each honeycomb corner point. Both embodiments of the ribs result in a uniformly high compressive strength of the entire film without reducing its flexibility. The honeycomb structure enables a particularly material-saving and mechanically particularly stable leak protection film.
Bevorzugt hat die Folie einschließlich der Noppen eine Gesamtdicke von einigen Zehntel Millimetern bis einigen Millimetern, besonders bevorzugt zwischen einem und drei Millimetern. Folien solcher Gesamtdicke sind aus einer Vielzahl von Materialien einfach flexibel herstellbar und reduzieren das Tankvolumen nur geringfügig. Ferner reichen bereits Folien solcher Dicke zur Ausbildung eines Doppelwandtanks für ein Leckschutzüberwachungssystem aus.The film, including the knobs, preferably has a total thickness of a few tenths of a millimeter to a few millimeters, particularly preferably between one and three millimeters. Films of such total thickness can be flexibly produced from a large number of materials and reduce the tank volume only slightly. Furthermore, films of such thickness are sufficient to form a double-walled tank for a leak protection monitoring system.
Zur sicheren Ausbildung des durchgängigen Hohlraums mit der flexiblen Folie ist es günstig, wenn die Folie an einer Rippe zwischen 70% und 90% ihrer Gesamtdicke und in einer zwischen Rippen liegenden Mulde zwischen 50% bis 70 % ihrer Gesamtdicke hat.For the safe formation of the continuous cavity with the flexible film, it is favorable if the film has between 70% and 90% of its total thickness on a rib and between 50% and 70% of its total thickness in a trough lying between the ribs.
Besonders vorteilhaft ist es, wenn die Noppen einen gegenseitigen Abstand von einigen Zehntel Millimetern bis einigen Millimetern, bevorzugt zwischen einem halben und etwa zwei Millimetern, haben. Auch eine dünne, flexible Folie erzielt dadurch eine gleichmäßig hohe Druckfestigkeit. Dabei können benachbarte Noppen jeweils in alle Richtungen gleiche gegenseitige Abstände haben; zur einfacheren Herstellung der Folie sind jedoch bevorzugt die Abstände zwischen in verschiedenen Richtungen benachbarten Noppen der Folie unterschiedlich groß. Ferner kann dadurch der Folie in verschiedenen Richtungen unterschiedliche Flexibilität verliehen werden, insbesondere wenn die Noppen an Kreuzungs- bzw. Eckpunkten von Rippen ausgeformt sind.It is particularly advantageous if the knobs are at a mutual distance of a few tenths of a millimeter to a few millimeters, preferably between half a millimeter and about two millimeters. Even a thin, flexible film achieves a consistently high compressive strength. Adjacent knobs can have the same mutual spacing in all directions; for easier production of the film, however, the distances between knobs of the film which are adjacent in different directions are preferably of different sizes. Further This allows the film to be given different flexibility in different directions, especially if the knobs are formed by ribs at the intersection or corner points.
Gemäß einer weiteren bevorzugten Ausführungsform ist die Folie an ihrer den Noppen abgewandten Innenseite rau mit einer Rautiefe zwischen 20 µm und 200 µm, bevorzugt etwa 100 µm. Eine raue Innenseite ist einfacher bzw. haltbarer mit einer optionalen Beschichtung zu versehen.According to a further preferred embodiment, the film is rough on its inside facing away from the knobs with a roughness depth between 20 μm and 200 μm, preferably about 100 μm. A rough inside is easier or more durable to be provided with an optional coating.
Besonders günstig ist es, wenn die Folie an ihrer Innenseite mit einer elektrisch leitfähigen Deckschicht beschichtet ist. Eine solche Deckschicht fördert, wenn sie ordnungsgemäß geerdet ist, ein Ableiten elektrostatischer Ladungen und reduziert dadurch die Gefahr von Entzündungen, z.B. wenn Montage- oder Wartungspersonal den Tank betritt.It is particularly favorable if the inside of the film is coated with an electrically conductive cover layer. Such a cover layer, if properly grounded, promotes the dissipation of electrostatic charges and thereby reduces the risk of ignition, e.g. when assembly or maintenance personnel enter the tank.
Als Folienmaterial kommt ein Vielzahl flexibler Natur- oder Kunststoffe in Frage, welche je nach vom Tank aufzunehmendem Fluid ausgewählt werden können. Für das Auskleiden eines Kraftstofftanks ist es vorteilhaft, wenn das Folienmaterial ein Polyurethan ist. Folien aus Polyurethan sind benzin-, diesel- und mineralölbeständig, sehr flexibel, einfach zu verarbeiten und langlebig.A large number of flexible natural or plastic materials can be considered as film material, which can be selected depending on the fluid to be taken up by the tank. For lining a fuel tank, it is advantageous if the film material is a polyurethane. Polyurethane foils are resistant to petrol, diesel and mineral oil, very flexible, easy to process and durable.
Um das Auskleiden des Fluidtanks zu vereinfachen, ist es besonders günstig, wenn die Folie in einem kollabierten Zustand in den Fluidtank einführbar und darin expandierbar ist. Auf diese Weise kann der Fluidtank ausgekleidet werden, ohne dass dazu Montagepersonal im Tankinneren erforderlich ist.In order to simplify the lining of the fluid tank, it is particularly advantageous if the film can be inserted into the fluid tank in a collapsed state and can be expanded therein. In this way, the fluid tank can be lined without the need for installation personnel inside the tank.
Die Erfindung wird nachstehend anhand von in den beigeschlossenen Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. In den Zeichnungen zeigen:
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Fig. 1 einen mit einer erfindungsgemäßen Leckschutzfolie ausgekleideten Doppelwand-Fluidtank; - die
Fig. 2a und 2b einen Ausschnitt einer ersten Variante der Leckschutzfolie vonFig. 1 in der Draufsicht (Fig. 2a ) bzw. als Detail A vonFig. 1 im Schnitt (Fig. 2b ) entlang der Schnittlinie B-B vonFig. 2a ; - die
Fig. 3a und 3b einen Ausschnitt einer zweiten Variante der Leckschutzfolie vonFig. 1 in der Draufsicht (Fig. 3a ) bzw. als Detail A vonFig. 1 im Schnitt (Fig. 3b ) entlang der Schnittlinie C-C vonFig. 3a ; und - die
Fig. 4a und 4b einen Ausschnitt einer dritten Variante der Leckschutzfolie vonFig. 1 in der Draufsicht (Fig. 4a ) bzw. als Detail A vonFig. 1 im Schnitt (Fig. 4b ) entlang der Schnittlinie D-D vonFig. 4a .
-
Fig. 1 a double-walled fluid tank lined with a leak protection film according to the invention; - the
2a and 2b a section of a first variant of the leak protection film fromFig. 1 in top view (Fig. 2a ) respectively. as detail A ofFig. 1 on average (Fig. 2b ) along the section line BB fromFig. 2a ; - the
3a and 3b a section of a second variant of the leak protection film fromFig. 1 in top view (Fig. 3a ) or as detail A ofFig. 1 on average (Fig. 3b ) along the section line CC ofFig. 3a ; and - the
4a and 4b a section of a third variant of the leak protection film fromFig. 1 in top view (Fig. 4a ) or as detail A ofFig. 1 on average (Fig. 4b ) along the section line DD ofFig. 4a .
In
Zur Aufnahme von flüssigen oder gasförmigen Kraftstoffen oder anderen vielfach aggressiven Fluiden ist der Tank 1 gemäß
Zum Auskleiden eines Tanks, z.B. beim Sanieren oder Nachrüsten, wird die Folie 6 beispielsweise in einem kollabierten Zustand durch die Öffnung 5 in das Tankinnere eingeführt und darin expandiert. Zum Expandieren wird gemäß einem dem Fachmann bekannten Verfahren die Folie 6 im Tankinneren aufgeblasen und/oder der Raum zwischen Folie 6 und Tankwandung 2 evakuiert. Montagepersonal ist dazu im Tankinneren nicht erforderlich. Um das Einführen der Folie 6 durch die Öffnung 5 eines bestehenden Tanks zu ermöglichen, ist das Material der Folie 6 flexibel. Je flexibler die Folie 6 ist, desto einfacher lässt sie sich durch die Öffnung 5 einführen und im Tankinneren expandieren, desto geringer ist allerdings auch die mechanische Belastbarkeit der Folie 6.For lining a tank, for example when renovating or retrofitting, the
Der Fluidtank 1 hat gemäß
Die Folie 6 hat dazu gemäß einer ersten, nicht näher dargestellten Ausführungsform an ihrer der Tankwandung 2 zuzuwendenden Außenseite Sa Noppen 8, welche direkt aus dem Folienmaterial selbst ("in einem Guss") ausgeformt sind. Die Noppen 8 stützen die Folie 6 der Tankwandung 2 ab, wenn der Tank 1 fertig ausgekleidet ist. Auf diese Weise wird der genannte durchgängige Hohlraum 7 zwischen Tankwandung 2 und Folie 6 mithilfe der Noppen 8 ausgebildet.The
Anhand der
In der Ausführungsform gemäß den
Die Rippen 9 können z.B. alle zueinander parallel - auch wellen- oder zickzackförmig und somit stückweise zueinander parallel - angeordnet und/oder unterbrochen sein, wenn gewünscht, um beispielsweise an Faltungsstellen der kollabierten Folie 6 oder an Kanten in der Tankwandung 2 flexibler zu sein. Im Beispiel der
Das Beispiel der
Es versteht sich, dass die Rippen 9 mehr als drei Gruppen G1, G2, ..., allgemein Gi, bilden können und/oder einander in anderer Weise kreuzen können, sodass sie beispielsweise - anders als in den dargestellten Beispielen - keine kongruenten Mulden 10 bilden. Auch könnten einzelne Rippen 9 oder ein Gruppe Gi paralleler Rippen 9 weniger stark ausgeformt, d.h. weniger erhaben, oder die Rippen 9 überhaupt unregelmäßig angeordnet sein.It goes without saying that the
Die Rippen 9 des Beispiels der
Die Folie 6 ist beispielsweise aus einem Polyurethan oder einem anderen flexiblen, luftdichten, fluid-resistenten Material gefertigt. Sie kann ein Gesamtdicke d - einschließlich der Noppen 8 - von einigen Zehntel Millimetern bis einigen Millimetern, bevorzugt zwischen einem und drei Millimetern, haben. Auch die Noppen 8 haben einen gegenseitigen Abstand a von einigen Zehntel Millimetern bis einigen Millimetern, bevorzugt zwischen einem halben und etwa zwei Millimetern, wobei die Abstände a zwischen in verschiedenen Richtungen benachbarten Noppen 8 ein und derselben Folie 6 aufgrund ihrer Strukturierung im Allgemeinen unterschiedlich groß sind. Ferner kann der Querschnitt der Noppen 8 rund oder - wie in den dargestellten Beispielen - oval sein, aber auch eine andere Form haben.The
Die Folie 6 kann an ihrer den Noppen 8 abgewandten Innenseite Si glatt oder rau sein und hat im letzteren Fall beispielsweise eine Rautiefe, d.h. eine Differenz aus maximaler und minimaler Oberflächenhöhe, zwischen 20 µm und 200 µm, bevorzugt etwa 100 µm. Optional ist die Folie 6 ferner an ihrer Innenseite Si mit einer elektrisch leitfähigen Deckschicht 11 (
Die Erfindung ist nicht auf die dargestellten Ausführungsformen beschränkt, sondern umfasst alle Varianten, Modifikationen und Kombinationen, die in den Rahmen der angeschlossenen Ansprüche fallen.The invention is not limited to the illustrated embodiments, but includes all variants, modifications and combinations that fall within the scope of the attached claims.
Claims (9)
- Leak protection sheet for lining a fluid tank (1), which sheet (6) is made of a flexible, airproof, fluid resistant material for adaptation to an inner shape of the tank (1), wherein the sheet (6) has knobs (8) on an outer side (Sa), which knobs (8) are directly formed out of the sheet material, for facing the tank wall (2), for supporting the sheet (6) on the tank wall (2) in the lined tank (1), and for forming a continuous cavity (7) between the tank wall (2) and the sheet (6), characterized in that the sheet (6) further has ribs (9) on its outer side (Sa), which ribs (9) are directly formed out of the sheet material such that the sheet material is made thinner in vats (10) which form between the ribs (9), on which ribs (9) the knobs (8) are formed further protruding therefrom, wherein either the ribs (9) are arranged parallel with each other in at least two groups (Gi) crossing each other and a knob (8) is formed on each crossing point, or the ribs (9) are arranged in a honeycomb structure and a knob (8) is formed on each honeycomb corner.
- Leak protection sheet according to claim 1, characterized in that the sheet (6) has at a rib (9) between 70% and 90% of its total thickness (d) and at a vat (10) lying between ribs (9) between 50% and 70% of its total thickness (d).
- Leak protection sheet according to claim 1 or 2, characterized in that the sheet (6) including the knobs (8) has a total thickness (d) of a few tenth of a millimetre up to a few millimetres, preferably between one and three millimetres.
- Leak protection sheet according to any one of claims 1 to 3, characterized in that the knobs (8) have a mutual distance (a) of a few tenth of a millimetre up to a few millimetres, preferably between a half and approximately two millimetres.
- Leak protection sheet according to claim 4, characterized in that the distances (a) between knobs (8) of the sheet (6) which are adjacent in different directions are different in size.
- Leak protection sheet according to any one of claims 1 to 5, characterized in that the sheet (6) is rough on its inner side (Si) opposite of the knobs (8) with a surface roughness between 20 µm and 200 µm, preferably approximately 100 µm.
- Leak protection sheet according to claim 6, characterized in that the sheet (6) is coated on its inner side (Si) with an electroconductive coating (11).
- Leak protection sheet according to any one of claims 1 to 7, characterized in that the sheet material is a polyurethane.
- Leak protection sheet according to any one of claims 1 to 8, characterized in that the sheet (6) can be collapsed for introducing into a fluid tank (1) and expanded therein for lining the tank (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50534/2016A AT518760B1 (en) | 2016-06-13 | 2016-06-13 | Leak protection film for a fluid tank |
PCT/AT2017/060105 WO2017214646A1 (en) | 2016-06-13 | 2017-04-24 | Leak prevention film for a fluid tank |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3468897A1 EP3468897A1 (en) | 2019-04-17 |
EP3468897B1 true EP3468897B1 (en) | 2020-04-01 |
Family
ID=58640649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17719990.8A Active EP3468897B1 (en) | 2016-06-13 | 2017-04-24 | Leak prevention film for a fluid tank |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3468897B1 (en) |
AT (1) | AT518760B1 (en) |
RU (1) | RU2734886C2 (en) |
WO (1) | WO2017214646A1 (en) |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1147089B (en) * | 1960-05-19 | 1963-04-11 | Hovalwerk Ag Ospelt | Storage container with inner bladder for liquids, especially for heating oil |
DE1812891A1 (en) * | 1968-12-05 | 1970-06-18 | Gerhard Weiske | Storage containers are leakproofed by inserting a |
CA943884A (en) * | 1971-02-25 | 1974-03-19 | Arthur P. Martin | Collapsible suction-wall liner |
CH603443A5 (en) * | 1976-09-14 | 1978-08-15 | Schaerer Max Alexander | Leak-proof double walled liquid storage container |
US4613922A (en) * | 1984-01-11 | 1986-09-23 | Neo Vac Aktiengesellschaft | Double-grounded wall tank, and method of its manufacture |
CH672110A5 (en) * | 1986-04-07 | 1989-10-31 | Adisa Entwicklungs Ag | |
EP0754635A1 (en) * | 1995-07-17 | 1997-01-22 | Adisa Service und Entwicklungs AG | Double-walled tank and method of making the same |
US5802631A (en) * | 1996-07-01 | 1998-09-08 | Friedman; Jerome | Pool liner installation method and apparatus |
PT1602597E (en) * | 2004-04-30 | 2007-02-28 | Majon Engineering And Consulti | Knobbed internal liner for tank container |
CH705340B1 (en) * | 2007-02-02 | 2013-02-15 | Ono Waterprot Gmbh | A double-walled tank. |
ES2345800T3 (en) * | 2007-10-29 | 2010-10-01 | Ono Waterprotection Gmbh | PROTUBERANCE SHEET. |
ATE543756T1 (en) * | 2007-12-05 | 2012-02-15 | Ono Waterprot Gmbh | SPACER STRUCTURE FOR THE LEAK PROTECTION LINING OF A TANK, LEAK PROTECTION LINING AND TANK WITH SUCH A SPACER STRUCTURE |
RU108028U1 (en) * | 2010-09-17 | 2011-09-10 | Открытое акционерное общество "Первая грузовая компания" | SOFT DEPOSIT IN THE CAR |
ITVR20120180A1 (en) * | 2012-09-07 | 2014-03-08 | Ag | METHOD FOR MAKING AN INTERNAL METAL WALL IN A TANK AND TANK WITH A DOUBLE WALL. |
EP2950954A1 (en) * | 2013-02-04 | 2015-12-09 | Fenotec GmbH Leckschutzsysteme | Interior lining for a tank or a container, and arrangement |
CN205087390U (en) * | 2015-11-06 | 2016-03-16 | 洛阳展腾焊材有限公司 | Vertical glass steel storage tank |
CN207712732U (en) * | 2017-12-28 | 2018-08-10 | 大连百利天华制药有限公司 | Water for injection storage tank on freeze-dried powder production line |
-
2016
- 2016-06-13 AT ATA50534/2016A patent/AT518760B1/en active
-
2017
- 2017-04-24 RU RU2018141214A patent/RU2734886C2/en active
- 2017-04-24 WO PCT/AT2017/060105 patent/WO2017214646A1/en active Search and Examination
- 2017-04-24 EP EP17719990.8A patent/EP3468897B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
AT518760B1 (en) | 2018-04-15 |
RU2018141214A (en) | 2020-05-25 |
AT518760A1 (en) | 2017-12-15 |
EP3468897A1 (en) | 2019-04-17 |
WO2017214646A1 (en) | 2017-12-21 |
RU2018141214A3 (en) | 2020-09-04 |
RU2734886C2 (en) | 2020-10-23 |
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