EP1224134A1 - Leckschutzauskleidung fur tanks und verfahren zur ausrüstung von tanks mit einer leckschutzauskleidung - Google Patents
Leckschutzauskleidung fur tanks und verfahren zur ausrüstung von tanks mit einer leckschutzauskleidungInfo
- Publication number
- EP1224134A1 EP1224134A1 EP00975879A EP00975879A EP1224134A1 EP 1224134 A1 EP1224134 A1 EP 1224134A1 EP 00975879 A EP00975879 A EP 00975879A EP 00975879 A EP00975879 A EP 00975879A EP 1224134 A1 EP1224134 A1 EP 1224134A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- leg
- tank bottom
- leak protection
- parallel
- 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.)
- Granted
Links
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
- B65D90/48—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
- B65D90/503—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls under pressure or vacuum
-
- 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
Definitions
- the invention relates to a leak protection lining for tanks for storing water-endangering media, using flexible plastic films, and a method for equipping tanks with a leak protection lining.
- Flat-bottom tanks are made of steel or reinforced concrete and are mainly used to store fuels, mineral oils, acids, alkalis, solvents or the like. In practice, both single-walled and double-walled flat-bottom tanks are used. For environmental reasons, there is a need to monitor the flat-bottom tanks for leaks. To make this possible, single-walled storage tanks must be retrofitted with an additional leak protection lining. It is known e.g. also to weld in an additional intermediate floor made of metal and to evacuate the resulting chamber or to keep it at a pressure below atmospheric pressure, in order to detect leaks early by monitoring the pressure difference.
- EP 0 705 771 A1 describes a method for producing a double-walled tank from a single-walled tank. Flat profiles are welded onto the inner tank wall and sheets are welded onto the flat profiles.
- connection of the film to the tank wall is difficult since the connection points have to be media and vacuum tight.
- connection points have to be media and vacuum tight.
- it must also be taken into account that they are outdoors and are exposed to considerable temperature fluctuations. Additionally changing liquid levels in the containers also affect the expansion behavior of the container material.
- a flat-bottom tank with a leak protection lining which consists of at least one pressure-stable, cavity-forming insert and a media-resistant plastic film resting on this insert.
- the film covers the tank bottom and extends into the lower region of the inside of the tank wall and is attached to the inside at a short distance from the tank bottom by means of a clamping device.
- the insert covers the existing tank floor and extends at most to below the clamping device.
- the clamping device is preferably arranged at a distance of 100 to 500 mm from the tank bottom.
- the clamping device consists of bolts arranged at the same height, fixed in or on the tank wall at defined intervals and projecting inwards, onto which the clamping rails can be attached. Between the clamping rails and the film as well as the film and the inside of the tank wall, elastic sealing tapes are arranged all around. The clamping rails are locked under pressure on the bolts.
- Certain tanks have a bottom that is strongly inclined towards the center with a centrally located outlet. Due to the flow movement towards the center Liquid moves the film from the wall / floor transition area to the center of the container, causing inadmissible tensions in the film in this area. The stirring movements cause the film to "flutter", particularly when the liquid level in the tank is low, which means that there is a risk of the film tearing off. The same danger to the film system exists in the case of necessary cleaning processes if sludge deposited on the floor has to be removed.
- tanks used in the mineral oil industry have pipes in the lower region of the tank wall for removing the water layer that settles above the tank bottom. Lining such tanks with a flexible film system that is attached to the tank wall is extremely complicated and very expensive.
- the invention has for its object to provide a leak protection lining system for tanks using flexible films, which is suitable for universal tanks of different types, especially those with internals located near the floor, requires little installation effort and reliable leak protection monitoring in the tank bottom and the tank wall guaranteed. Furthermore, a suitable method for equipping tanks with a leak protection lining is to be created.
- the leak protection lining consists of a circumferential fastening bracket arranged in the corner area of the tank, between the tank wall and the tank bottom, each with an angle bracket running parallel to the tank wall and the tank bottom
- the leg running parallel to the tank wall is stable and connected to the tank wall in a media-tight manner.
- the mounting bracket is fixed in its position so that a suitable cavity for leakage monitoring is formed between it and the adjacent areas of the tank wall and the tank bottom.
- the cavity-forming insert in the area of the tank floor either completely covers the entire tank floor or only the area which is delimited by the peripheral leg on the bottom.
- the media-resistant film or sheet lying on the cavity-forming insert overlaps the bottom leg of the mounting bracket and is connected to this media-tight.
- the mounting bracket consists of a prefabricated component or of several individual parts that are connected in a media-tight manner as part of the installation of the leak protection lining to form a circumferential mounting bracket.
- the proposed leak protection lining leads to a number of advantages in comparison to the previously known and applied solutions.
- the critical area of tanks for the storage of chemical products is the transition area between tank wall and tank bottom, which is generally to be monitored for possible leaks.
- the arrangement of a spaced, circumferential fastening angle in this area on the one hand creates the necessary cavity for effective leakage monitoring and on the other hand enables tension-free fixing of the film or sheet lying on the cavity-forming insert.
- the connection points of the film with the mounting bracket are in constant contact with the medium to be stored, even at extremely low levels, and are not exposed to any shear force, which is known to be extremely critical for adhesive or welded connections.
- connection points are only exposed to the liquid pressure in the container and are not subject to changing temperature fluctuations, as is the case with the fastening of film systems in the area of the tank wall.
- the film covering and sealing the tank bottom is also not exposed to movements in the case of stirring elements arranged in the tank, which could lead to the film tearing off. Even when the tank is being emptied or cleaned, due to the stable position of the film in only one plane, no forces favoring tearing off the film act on it.
- the leak protection lining according to the invention can be produced inexpensively and only requires little assembly effort in comparison to the previously known solutions. It is particularly suitable for retrofitting already in Operational tanks suitable and universally applicable for tanks of different types and designs.
- FIG. 1 shows the detail of a tank in the tank wall / tank bottom area with a leak protection lining, in a perspective view
- FIG. 2 shows the section of a tank with a sloping bottom and a leak protection lining, as a cross-sectional representation
- FIG. 3 shows the corner area of a tank with a leak protection lining, the leg for fastening the film being equipped with a plastic coating, as a cross-sectional illustration
- FIG. 4 shows the corner region of a tank with a leak protection lining, the leg for fastening the film being designed as a flexible cloth, as a cross-sectional illustration,
- FIG. 5 shows the corner region of a tank with a leak protection lining, the fastening bracket being designed as a one-piece plastic component, as a cross-sectional illustration
- FIG. 6 shows the corner region of a tank with a leak protection lining, the leg running parallel to the tank wall having a collar with a subsequent cavity, as cross-sectional view
- FIG. 7 shows the corner area of a tank with a leak protection lining, the film or web of which is fastened with a mechanical clamping device, as a cross-sectional illustration and
- FIG. 8 shows the detail "X" according to FIG. 7 in an enlarged view.
- the steel tank shown in FIG. 1 is single-walled and consists of the tank wall 1 and the tank bottom 2, which are arranged at right angles to one another.
- a closed tank is intended, for example, for the storage of heating oil and has a length of 20 m and a height of 10 m.
- the tank also has a closable opening in the form of a manhole on the upper side (not shown).
- the empty tank is cleaned and the tank bottom 2 is checked for leaks, repaired if necessary and provided with a corrosion-inhibiting paint or sealed with a hardenable liquid plastic.
- the leak protection lining consists of a circumferential fastening bracket 4, which is installed in the corner area between the tank wall 1 and the tank bottom 2, a cavity-forming insert 3 and one media-resistant film or web 5 lying on the cavity-forming insert 3, which is attached circumferentially to the leg 4b, which runs parallel to the tank bottom 2, in a media-tight manner.
- the fastening bracket 4 is formed from several individual parts due to the relatively small opening as a manhole, which are connected to one another during the assembly of the leak protection lining.
- the fastening angle 4 consists of prefabricated angle sections 4 ′, 4 ′′, which each have a length of 2 m, for example.
- the individual angle sections consist of stainless steel with a material thickness of 6 mm and each have a leg length of 0,
- the individual angular sections 4 ', 4 "for forming the circumferential fastening bracket 4 are positioned by spacers 6 in such a way that a small distance of approximately 2 mm remains from the tank bottom 2 and the tank wall 1, through which the required cavity 7 for the Leakage monitoring is formed.
- the spacers 6 can be designed in various ways, for example as a cavity-forming insert or as integrally formed knobs or webs on the legs 4a and 4b. After the positioning of the angular sections 4 ', 4 ", they are fixed by means of a tack weld between the tank bottom 2 and the leg 4b running parallel to this.
- the abutting abutting narrow sides of the angular sections 4', 4" are welded to one another in a media-tight manner, such as illustrated by the weld 8 shown.
- a V-shaped circumferential weld 9 is attached to the upper edge of the leg 4a running parallel to the tank wall 1, through which the leg 4a is connected to the tank wall 1 in a media-tight manner.
- the necessary connecting pieces 10 for leakage monitoring are installed in the tank wall 1, in the region of the leg 4a running parallel to the tank wall 1. A commercially available vacuum leakage indicator is connected to this.
- the cavity-forming insert 3 is placed on the tank bottom 2 on the free space enclosed on the bottom side by the peripheral leg 4b.
- This consists, for example, of a fleece-lined flexible PEHD grid, which is rolled out and, as shown in FIG. 1, rests against the inward-facing end face of the circumferential leg 4b.
- the height of the insert 3 is dimensioned so that an almost paragraph-free connection to the leg 4b is guaranteed.
- a media-tight film or web 5 is placed on the insert 3, the dimensions of which are cut such that it overlaps the circumferential leg 4b by an amount which is greater than half the depth of the leg 4b.
- a flexible polypropylene film can be used as the film a thickness of 1.5 mm can be used.
- the film or sheet can consist of different materials, provided that it is permanently resistant to the medium to be stored.
- the PEHD grid as a cavity-forming insert can consist of several individual
- the area of tanks particularly at risk of corrosion, the transition from wall to floor, can be completely monitored for any leaks that occur.
- FIG. 2 shows the lower part of a tank with a sloping bottom 2 with an outlet cone 11 as a cross section.
- the circumferential mounting bracket 4 consists of prefabricated angle sections, the leg 4b running parallel to the tank bottom 2 already having the required angle of inclination.
- the cavity-forming insert 3 covers the entire tank bottom 2.
- the mounting bracket 4 lies on the insert 3 with its leg 4 b on the bottom. At the points where the leg 4b is welded to the tank bottom 2, the insert 3 has corresponding recesses.
- the bottom leg 4b has an inwardly directed, beveled end piece, e.g. in the form of a wedge to ensure a smooth transition of the film 5 in the overlap area.
- the circumferential mounting bracket 4 can also be used as a complete, prefabricated component.
- the embodiment variant shown in FIG. 3 differs only in the following from the variant according to FIG. 1.
- the two legs 4a and 4b of the angle sections 4 ', 4 "of the fastening angle 4 are delivered as individual parts and are only welded to an angle during assembly in the tank, which is indicated by the weld seam 12.
- the leg 4b running parallel to the tank bottom 2 is provided on its upper side, in the overlap area with the film 5, with a weldable or glueable plastic coating 13.
- an adhesive coating the inside of the overlap area of the film can also be provided 5 already with an adhesive be coated, the adhesive layer being covered by a peelable film. Bonding or welding the film requires a relatively small amount of manual work and can be implemented using the technology which is conventional per se.
- FIG. 4 A further embodiment variant is shown in FIG. 4, in which the legs of the mounting bracket 4 consist of different materials.
- the leg 4a running parallel to the tank wall 1 is made of stainless steel and the leg 4c running parallel to the tank bottom 2 is designed as a flexible flap which is made of a suitable plastic, for example an elastomeric material, and is molded onto the leg 4a.
- a suitable plastic for example an elastomeric material
- Mounting bracket be designed as a stable component.
- the flexible tabs 4c of the individual angular sections are then designed such that they overlap and are welded or glued together. If the flexible tab is made of an elastomer, a media-resistant sheet 5 made of the same material can also be used. The media-tight connection can then be made by vulcanization during assembly.
- FIG. 5 shows an embodiment in which the cavity 7 between the fastening angle 4 and the adjacent sections of the tank wall 1 and the bottom 2 is formed by cavity-forming inserts 3 and 14.
- the mounting bracket 4 is designed as a one-piece plastic component which bears against the cavity-forming inserts 3 and 14.
- the position of the mounting bracket 4 is essentially fixed by a flexible circumferential plastic bracket 15, which is attached to the inside of the tank wall 1 and the upper part of the leg 4a of the mounting bracket 4 by gluing.
- the plastic holder can also be formed by a hardenable, permanently elastic coating composition to be applied, which may also be used in conjunction with a reinforcing agent.
- the individual angular sections which can be designed with a tongue and groove as a plug connection, are either connected to one another in a media-tight manner by gluing or welding.
- the overlap area of the film 5 is also connected to the leg 4b of the fastening bracket 4 by gluing or welding.
- This version is used in particular when the tank wall 1 to be retrofitted with a leak protection lining already has a plastic coating or is provided with a rubber coating.
- the leg 4a of the plastic mounting bracket 4 has at its upper end a collar 16, which is followed by an undercut in the direction of the tank bottom 2, through which the cavity 7 for leakage monitoring is formed, which is filled with a cavity-forming insert 14 is. This is necessary so that in the operating state, due to the applied liquid pressure, no shear forces can act on the adhesive connections between the tank wall / collar and film / leg.
- the leg 4a can of course also be equipped with a molded-on spacer.
- the collar 16 is connected to the tank wall 1 in a media-tight manner by gluing.
- the collar 16 can preferably also be wedge-shaped, with an acute-angled profile pointing upward.
- the leak protection lining finally shown in FIG.
- FIG. 7 is designed analogously to that shown in FIGS. 1 and 3, only with the difference of a different type of fastening of the film or web 5 on the corresponding leg 4b of the fastening angle 4.
- the fastening of the film or Path 5 on the leg 4b takes place by means of a mechanical clamping device 17, which is shown enlarged in FIG.
- a mechanical clamping device 17 On the leg 4b running parallel to the tank bottom 2, threaded bolts 17a projecting upwards are arranged at equal distances from one another at a constant distance from the other leg 4a.
- a circumferential sealing band 17b is first put on without wrinkles, which is provided with precisely fitting holes in accordance with the spacing of the bolts 17a.
- the sealing tape 17b consists of a media-resistant, elastic plastic material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Examining Or Testing Airtightness (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19950466 | 1999-10-20 | ||
DE19950466A DE19950466C2 (de) | 1999-10-20 | 1999-10-20 | Leckschutzauskleidung für Tanks und Verfahren zur Ausrüstung von Tanks mit einer Leckschutzauskleidung |
PCT/EP2000/010249 WO2001028893A1 (de) | 1999-10-20 | 2000-10-18 | Leckschutzauskleidung für tanks und verfahren zur ausrüstung von tanks mit einer leckschutzauskleidung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1224134A1 true EP1224134A1 (de) | 2002-07-24 |
EP1224134B1 EP1224134B1 (de) | 2003-11-19 |
Family
ID=7926243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00975879A Expired - Lifetime EP1224134B1 (de) | 1999-10-20 | 2000-10-18 | Leckschutzauskleidung fur tanks und verfahren zur ausrüstung von tanks mit einer leckschutzauskleidung |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP1224134B1 (de) |
AT (1) | ATE254572T1 (de) |
AU (1) | AU1385301A (de) |
CA (1) | CA2387587A1 (de) |
CZ (1) | CZ294183B6 (de) |
DE (2) | DE19950466C2 (de) |
HU (1) | HUP0203252A2 (de) |
NO (1) | NO20021869L (de) |
PL (1) | PL354252A1 (de) |
WO (1) | WO2001028893A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20104828U1 (de) | 2001-03-20 | 2001-07-05 | Utek Umweltschutztechnologien GmbH, 06785 Oranienbaum | Verbindungssystem zur Befestigung einer flexiblen Kunststoffolie zur Leckschutzauskleidung an der Innenseite der Tankwandung eines Lagertanks |
DE10144149A1 (de) * | 2001-09-07 | 2003-03-27 | Lm Tankschutz Gmbh | Leckschutzeinrichtung für einen Tankbehälter |
DE10223930C1 (de) * | 2002-05-10 | 2003-11-06 | Mueller Patent Entwicklungs Un | Anordnung zum, auch nachrüstbaren, Leckageschutz für metallische Tanks oder Behälter |
EP2055404B1 (de) * | 2007-10-29 | 2010-05-05 | OnO Waterprotection GmbH | Noppenfolie sowei Verfahren zur Herstellung derselben |
DE102012000385A1 (de) * | 2012-01-06 | 2013-07-11 | GREEN PROTECTION GmbH | Abdichtungssystem für Innenflächen von Betonseitenwänden von Siloanlagen, Siloanlage mit demselben und Verfahren zum Überprüfen des Dichtigkeitszustands einer derartigen Siloanlage |
ITVR20120180A1 (it) * | 2012-09-07 | 2014-03-08 | Ag | Metodo per realizzare una parete interna di metallo in un serbatoio e serbatoio avente una doppia parete. |
US20250066114A1 (en) * | 2023-08-25 | 2025-02-27 | Dutchland, Inc. | Tank Wall Connection |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6751479U (de) * | 1968-09-27 | 1969-02-13 | Erhard Joos | Lagerbehaelter fuer fluessigkeiten |
CH653643A5 (de) * | 1981-07-02 | 1986-01-15 | Neo Vac Ag | Doppelwandiger tank und verfahren zur herstellung desselben. |
DE9104188U1 (de) * | 1991-04-06 | 1991-06-06 | IBB Intraplan Beratungs- u. Betreuungs GmbH, 24558 Henstedt-Ulzburg | Tank für wassergefährliche, insbesondere brennbare Flüssigkeiten |
DE4217717A1 (de) * | 1992-05-29 | 1993-12-02 | Wolff Walsrode Ag | Verwendung einer elektrisch leitfähigen Polyurethan-Folie zur Herstellung von flexiblen Einlagen für Behälter zur Lagerung brennbarer Flüssigkeiten |
DE4435237C1 (de) * | 1994-10-04 | 1996-02-22 | Quast Gmbh & Co Kg Geb | Verfahren und Vorrichtung zur Herstellung eines doppelwandigen Tanks |
DE29513086U1 (de) * | 1995-08-14 | 1995-11-16 | Wülfing und Hauck GmbH + Co KG, 34260 Kaufungen | Innenverkleidung für Flüssigkeits-, insbesondere Benzintanks und damit hergestellter Tank |
WO1998013278A1 (de) * | 1996-09-27 | 1998-04-02 | Merkler, H. | Tank für flüssigkeiten, insbesondere für chemisch aggressive flüssigkeiten |
DE29807285U1 (de) * | 1998-04-22 | 1998-07-30 | Utek Umweltschutztechnologien GmbH, 06785 Oranienbaum | Flachbodentank mit Leckschutzauskleidung |
DE29918485U1 (de) * | 1999-10-20 | 2000-11-30 | Utek Umweltschutztechnologien GmbH, 06785 Oranienbaum | Leckschutzauskleidung für Tanks |
-
1999
- 1999-10-20 DE DE19950466A patent/DE19950466C2/de not_active Expired - Fee Related
-
2000
- 2000-10-18 CZ CZ20021349A patent/CZ294183B6/cs not_active IP Right Cessation
- 2000-10-18 AT AT00975879T patent/ATE254572T1/de not_active IP Right Cessation
- 2000-10-18 PL PL00354252A patent/PL354252A1/xx not_active IP Right Cessation
- 2000-10-18 EP EP00975879A patent/EP1224134B1/de not_active Expired - Lifetime
- 2000-10-18 HU HU0203252A patent/HUP0203252A2/hu unknown
- 2000-10-18 AU AU13853/01A patent/AU1385301A/en not_active Abandoned
- 2000-10-18 WO PCT/EP2000/010249 patent/WO2001028893A1/de active Search and Examination
- 2000-10-18 CA CA002387587A patent/CA2387587A1/en not_active Abandoned
- 2000-10-18 DE DE50004521T patent/DE50004521D1/de not_active Expired - Fee Related
-
2002
- 2002-04-19 NO NO20021869A patent/NO20021869L/no unknown
Non-Patent Citations (1)
Title |
---|
See references of WO0128893A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50004521D1 (de) | 2003-12-24 |
NO20021869D0 (no) | 2002-04-19 |
CZ20021349A3 (cs) | 2003-06-18 |
HUP0203252A2 (en) | 2003-05-28 |
CA2387587A1 (en) | 2001-04-26 |
WO2001028893A1 (de) | 2001-04-26 |
PL354252A1 (en) | 2003-12-29 |
EP1224134B1 (de) | 2003-11-19 |
ATE254572T1 (de) | 2003-12-15 |
NO20021869L (no) | 2002-04-22 |
CZ294183B6 (cs) | 2004-10-13 |
AU1385301A (en) | 2001-04-30 |
DE19950466C2 (de) | 2001-08-16 |
DE19950466A1 (de) | 2001-05-10 |
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