EP0345625A2 - Couvercle flottant pour un réservoir à liquides et procédé pour la fabrication d'un tel couvercle flottant - Google Patents

Couvercle flottant pour un réservoir à liquides et procédé pour la fabrication d'un tel couvercle flottant Download PDF

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Publication number
EP0345625A2
EP0345625A2 EP89109876A EP89109876A EP0345625A2 EP 0345625 A2 EP0345625 A2 EP 0345625A2 EP 89109876 A EP89109876 A EP 89109876A EP 89109876 A EP89109876 A EP 89109876A EP 0345625 A2 EP0345625 A2 EP 0345625A2
Authority
EP
European Patent Office
Prior art keywords
plates
cover
liquid
layer
floating
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
Application number
EP89109876A
Other languages
German (de)
English (en)
Other versions
EP0345625A3 (en
EP0345625B1 (fr
Inventor
Harald Zaudtke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ritter-Chemie & Co KG GmbH
Original Assignee
Ritter-Chemie & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ritter-Chemie & Co KG GmbH filed Critical Ritter-Chemie & Co KG GmbH
Priority to AT89109876T priority Critical patent/ATE97878T1/de
Publication of EP0345625A2 publication Critical patent/EP0345625A2/fr
Publication of EP0345625A3 publication Critical patent/EP0345625A3/de
Application granted granted Critical
Publication of EP0345625B1 publication Critical patent/EP0345625B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • B65D88/36—Large containers having floating covers, e.g. floating roofs or blankets with relatively movable sections
    • 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
    • B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
    • B65D90/42—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of particular materials for covering surface of liquids

Definitions

  • the invention relates to a floating cover for liquid containers according to the preamble of claim 1. Furthermore, the invention relates to a method for producing such a floating cover according to the preamble of claim 12.
  • Liquid containers for holding liquids which should not come into direct contact with the atmosphere usually have a cover which, for the sake of simplicity, is designed as a cover floating on the surface of the liquid.
  • This floating cover is usually designed to be gas-tight, so that gases released in the liquid stored in the liquid container do not reach the atmosphere and can influence it in particular by unpleasant odors.
  • the disadvantage of the known cover is the complex production.
  • a spraying and gluing device for the liquid containers to be covered has to be created for the production of the cover.
  • a precise adaptation of the foam body to the respective container to be covered is necessary, since it can only be glued to form a gas-tight cover if the upright edges of the foam body lie close together.
  • the object of the invention is a reliable gas-tight floating Ab to create cover that is easy to manufacture and easily applied to the liquid, regardless of the shape of the liquid container. It is a further object of the invention to provide a simple method for producing such floating covers and for simply applying them to the liquid.
  • the floating cover has the features of claim 1.
  • a continuous (cover) layer subsequently applied thereon, it is possible to use prefabricated bodies for the production of the floating cover, which, in contrast to the prior art, is not produced on site immediately before the cover is applied to the liquid Need to become.
  • the cover layer also enables larger gaps between adjacent bodies to be closed, so that essentially indiscriminately can be applied to the liquid in the liquid container, without specifically being adapted to the respective (plan) shape of the liquid container to be covered.
  • the selection of the suitable shape of the (foam) body does not require any restrictions. Bodies of different sizes and shapes can be used, and breakage of the bodies during transport to the liquid container to be covered is also harmless, so broken bodies can still be used.
  • the use has proven to be particularly advantageous predominantly of a rectangular plan (plate-shaped) body. These are available on the market as standardized plates, ie they do not require any adjustment to manufacture the floating cover. Above all, rectangular plates can be used to make one Base layer for any layout of the liquid container to be covered, especially also for round liquid containers.
  • the cover layer is foamed onto the base layer from plates arranged randomly next to one another.
  • the foaming can also fill larger gaps between adjacent plates while still providing a sufficient connection, which also ensures that the resulting floating cover is gas-tight.
  • the cover layer is approximately as dense as the base layer made of the plates placed on the liquid to be covered. This relatively thick base layer gives the floating cover an extraordinarily high level of inherent stability.
  • the floating cover is weight-loaded against lifting off from the liquid by appropriate ballast.
  • the ballast is preferably arranged evenly distributed around the circumference of the floating cover, running approximately evenly around the edge of the liquid container to be covered.
  • a suitable ballast is liquid, namely water, which is embedded in a corresponding circumferential depression in the cover layer. It is also advantageous to use solid ballast bodies, preferably made of wood, for weighting the floating cover. In a preferred embodiment of the invention, these ballast bodies are integrated into the cover layer.
  • the method according to the invention has the features of claim 12.
  • Each of these two production stages is also easy to carry out, since the base layer can be produced from any other body that is only to be placed loosely on the surface of the liquid to be covered.
  • the connection and the gas-tight covering of the base layer by the cover layer which can be easily produced from the edge of the liquid container by means of appropriate plastic (foam) cannons.
  • the method according to the invention is particularly advantageous in that the bodies, which preferably consist of prefabricated (rectangular) plates, need to be placed on the liquid in any desired manner, namely unoriented, in order to produce the base layer. This can be done from the edge of the liquid container to be covered.
  • the number of plates required for the base layer is expediently determined simply from the quantity of disoriented, but essentially non-overlapping, plates to be placed on the surface of the liquid container. If there are larger spaces between the plates that are no longer to be filled by an entire plate, these can be filled with smaller plates, in particular fragments of broken plates, so that possibly damaged plates can also be used during transport of the plates.
  • ballast bodies in order to weigh down especially the edge of the floating cover into the cover layer.
  • corresponding ballast bodies in particular wooden beams or blocks, are placed more or less regularly on plates located at the edge of the liquid container before the covering layer is foamed onto the base layer, the wooden blocks or beams inevitably in their place on the plates when the covering layer is foamed placed position are permanently fixed.
  • the ballast can be produced easily and with simple means.
  • the floating cover is designed for the gas-tight closure of a liquid, namely wastewater 11, arranged in a cylindrical liquid container 10.
  • the floating cover shown here thus serves in particular to evaporate the waste water 11 arranged in the liquid container 10 and thus to prevent unpleasant odors.
  • the floating cover according to the invention is composed of a lower layer, namely a support layer 12 floating on the waste water 11, and a cover layer 13 foamed thereon.
  • Both the base layer 12 and the cover layer 13 consist of foam plastic, namely polyurethane or polystyrene foam.
  • the base layer 12 consists of polystyrene foam with a density of approximately 15 kg / m 3
  • the cover layer 13 consists of polyurethane foam with a density of approximately 40 to 50 kg / m 3.
  • the thickness of the base layer 12 and the cover layer 13 are approximately the same, the cover layer 13 which is slightly corrugated due to the foaming in the surface preferably being approximately 50 mm above the plane of the base layer 12 facing the cover layer 13 and also the base layer in the region between the Cover layer 13 and the surface of the liquid is about 50 mm thick.
  • 1 shows the liquid container 10 with the surface of the waste water 11 partially covered by the support layer 12.
  • the base layer 12 consists of more or bodies of polystyrene foam arranged less randomly relative to one another, namely polystyrene foam sheets 14.
  • the sheets 14 in the exemplary embodiment shown are predominantly equally rectangular. But you can also have any other, for example square or round bases.
  • To complete the base layer 12 as many plates 14 are placed on the surface of the waste water 11 in the liquid container 10 as can be accommodated in the liquid container 10 without overlapping individual plates 14, that is to say in an almost common plate plane.
  • the cover layer 13 is applied to the base layer 12 explained in more detail above by simply foaming it in the liquid state. 2 and 3 clearly different spaces 18 between adjacent plates 14 or (smaller) plates 16 or 17, are foamed by the material of the cover layer 13 by this in the liquid state applied to the base layer 12 in polyurethane foam the gaps 18 flows in and at least partially fills them. 3 clearly shows that smaller spaces 18 are less completely filled than wider spaces 18, which can be filled more easily by the liquid foam. Alternatively, it is possible to go through correspondingly thinner foam to completely fill thinner gaps 18 by then the material of the cover layer 13 flows down to the surface of the waste water 11 in the liquid container 10 and is stopped by the latter in the flow.
  • the cover shown here is provided with a circumferential ballast on its edge. This is formed here from wooden beams 19 and wooden blocks 20. These are loosely placed on the plates 14, 16 and 17 resting on the edge 21 of the liquid container 10. A circumferential ballast of consecutive wooden beams 19 or wooden blocks 20 is thus formed on the base layer 12.
  • ballast bodies which protrude slightly from the cover layer 13 or connect approximately flush with the latter.
  • the ballast bodies define a thickness when the cover layer 13 is foamed, in that it is applied to the base layer 12 until the tops of the ballast bodies can easily be seen from it or are just covered.
  • ballast bodies which are not completely enclosed by the polyurethane foam of the cover layer 13 are expediently made of rot-proof wood or other rot-proof materials, in particular plastic.
  • (large) plates 14 are placed on the liquid container 10, which is almost completely filled with waste water 11, in any orientation of the plates 14 with respect to one another, as illustrated in FIG. 1.
  • As much (large) plates 14 are placed on the waste water 11 in the liquid container 10 as can be accommodated on the surface of the waste water 11 without overlapping the plates 14.
  • Larger free spaces 15 that may arise between the (large) plates 14 can - as in the present exemplary embodiment - be compensated for by smaller plates 16, 17 of different shapes. This creates a base layer 12 on the wastewater 11, in which gaps 18 of different sizes and shapes are created between the plates 14 and 16 and 17.
  • the cover layer 13 is likewise applied to the base layer 12 from the outer edge 21 of the liquid container 10.
  • foam is preferably foamed outward from the center of the liquid container 10, that is to say in the direction of the edge 21. It may also be expedient to drive a foam cannon - or also a plurality of foam cannons - from the outside around the edge 21 of the liquid container 10 during foaming.
  • ballast bodies are anchored in the cover at the same time.
  • wood is placed on the base layer 12 before the cover layer 13 is foamed beams 19 or wooden blocks 20 foamed into the top layer 13.
  • a recess running around the edge 21 can be formed therein. This is then hardened with the top layer 13 with ballast water or the like. (e.g. sand) filled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
EP89109876A 1988-06-08 1989-06-01 Couvercle flottant pour un réservoir à liquides et procédé pour la fabrication d'un tel couvercle flottant Expired - Lifetime EP0345625B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89109876T ATE97878T1 (de) 1988-06-08 1989-06-01 Schwimmende abdeckung fuer einen fluessigkeitsbehaelter und verfahren zur herstellung einer derartigen schwimmenden abdeckung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3819450 1988-06-08
DE3819450 1988-06-08
DE3821909 1988-06-29
DE3821909A DE3821909A1 (de) 1988-06-08 1988-06-29 Schwimmende abdeckung fuer einen fluessigkeitsbehaelter und verfahren zur herstellung einer derartigen schwimmenden abdeckung

Publications (3)

Publication Number Publication Date
EP0345625A2 true EP0345625A2 (fr) 1989-12-13
EP0345625A3 EP0345625A3 (en) 1990-12-27
EP0345625B1 EP0345625B1 (fr) 1993-12-01

Family

ID=25868913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109876A Expired - Lifetime EP0345625B1 (fr) 1988-06-08 1989-06-01 Couvercle flottant pour un réservoir à liquides et procédé pour la fabrication d'un tel couvercle flottant

Country Status (2)

Country Link
EP (1) EP0345625B1 (fr)
DE (2) DE3821909A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123559A (en) * 1984-10-26 1992-06-23 Qiu Zhang F Built-up inner floating ceiling for use in an oil storage tank
AT395192B (de) * 1990-04-06 1992-10-12 Kunststoff Verbund Systeme Ges Schwimmfaehiges modulelement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504740A1 (de) * 1995-02-14 1996-08-22 Ladwig Karl Heinz Geruchsarme Abdeckung für Behälter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307508A (en) * 1939-10-04 1943-01-05 Du Pont Preventing evaporation from oil storage tanks
DE815624C (de) * 1950-06-25 1952-01-24 Carl-Hans Dr-Ing Biedendieck Schutzdecke fuer Tanks
FR1467256A (fr) * 1965-12-17 1967-01-27 Chausson Usines Sa élément composite flottant et application de cet élément à la réalisation de couvercles flottants
US3462040A (en) * 1965-12-01 1969-08-19 James Galloway Device for reducing the evaporation of water from dams,tanks and like water storage units
GB2148374A (en) * 1983-10-19 1985-05-30 Bignier Schmid Laurent Liquid-storage tank with floating roof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1541092A (fr) * 1967-08-23 1968-10-04 Giovanola Freres Sa Couvercle flottant de fermeture à joint gonflable
DE3032763A1 (de) * 1980-08-30 1982-07-22 Schwarz Apparate- und Behälterbau GmbH, 7295 Dornstetten Schwimmdecke zur oberflaechen-abdeckung einer fluessigkeit
DE8628901U1 (de) * 1986-10-30 1987-01-08 Fritz Reinke Engineering, 6120 Erbach Abdeckung für mit Flüssigkeit gefüllte Becken

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307508A (en) * 1939-10-04 1943-01-05 Du Pont Preventing evaporation from oil storage tanks
DE815624C (de) * 1950-06-25 1952-01-24 Carl-Hans Dr-Ing Biedendieck Schutzdecke fuer Tanks
US3462040A (en) * 1965-12-01 1969-08-19 James Galloway Device for reducing the evaporation of water from dams,tanks and like water storage units
FR1467256A (fr) * 1965-12-17 1967-01-27 Chausson Usines Sa élément composite flottant et application de cet élément à la réalisation de couvercles flottants
GB2148374A (en) * 1983-10-19 1985-05-30 Bignier Schmid Laurent Liquid-storage tank with floating roof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123559A (en) * 1984-10-26 1992-06-23 Qiu Zhang F Built-up inner floating ceiling for use in an oil storage tank
AT395192B (de) * 1990-04-06 1992-10-12 Kunststoff Verbund Systeme Ges Schwimmfaehiges modulelement

Also Published As

Publication number Publication date
DE58906278D1 (de) 1994-01-13
EP0345625A3 (en) 1990-12-27
DE3821909A1 (de) 1989-12-21
EP0345625B1 (fr) 1993-12-01

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