WO2001092137A1 - Couvercle flottant, reservoir equipe d'un tel couvercle, et procede de couverture d'un tel reservoir - Google Patents

Couvercle flottant, reservoir equipe d'un tel couvercle, et procede de couverture d'un tel reservoir Download PDF

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Publication number
WO2001092137A1
WO2001092137A1 PCT/DK2001/000376 DK0100376W WO0192137A1 WO 2001092137 A1 WO2001092137 A1 WO 2001092137A1 DK 0100376 W DK0100376 W DK 0100376W WO 0192137 A1 WO0192137 A1 WO 0192137A1
Authority
WO
WIPO (PCT)
Prior art keywords
reservoir
edge
cover
film
chamber
Prior art date
Application number
PCT/DK2001/000376
Other languages
English (en)
Inventor
Bjarne Kongsgaard
Original Assignee
Echberg Manutech Systems A/S U.Stiftelse
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 Echberg Manutech Systems A/S U.Stiftelse filed Critical Echberg Manutech Systems A/S U.Stiftelse
Priority to AU63770/01A priority Critical patent/AU6377001A/en
Publication of WO2001092137A1 publication Critical patent/WO2001092137A1/fr

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
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • A01C3/02—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure
    • A01C3/028—Covers, roofs or other structures for covering manure storage places

Definitions

  • the present invention concerns a floating cover for an upwardly open liquid reservoir, comprising an edge area connected with the edge of the reservoir.
  • the invention furthermore concerns a reservoir comprising such a cover.
  • the invention concerns a method for covering an upwardly open reservoir comprising an edge in that a cover is connected with the edge of the reservoir.
  • the known floating lids are not suited for collecting gases exuding from the liquid manure, e.g. by biological gasification, by aeration, by nitrification or by other processes. Covers secured at an edge area at the upper edge of the reservoir are also known. In these situations, we are speaking of a solid cover which may be relatively costly when the case is containers with a large surface area.
  • cover of the kind mentioned in the introduction which is peculiar in that the cover comprises an upper film extending beyond the edge of the reser- voir, that a rim area thereof is connected with an area adjacent to the edge, that the upper film is supported by an inflatable chamber provided below and formed in that a lower film is fastened to the upper film and forming the chamber together with the film, and which imparts a vault extending up over the edge of the reservoir to the upper film and rests against a part of the reservoir or the liquid therein.
  • the cover is connected airtight with the edge of the reservoir, and that in the cover there are provided air locks for extracting gases from the interspace between the cover and the liquid in the reservoir.
  • extracting gases which e.g. may be formed by gasification of liquid manure, sewage, or similar in a digestion tank, a liquid manure tank or similar liquid reservoir. These gases may be led to external gas tanks or directly to places of consumption.
  • the reservoir according to the invention is peculiar in having a round, oval or polygonal cross-section, and that along one or more points along the outer side of the upper film, within the walls of the reservoir, there are provided openings for the passage of equipment associated with the reservoir, and that the film is provided in close connection with such equipment.
  • the reservoir may preferably be provided with a centrally located agitator aerating the liquid which preferably is liquid manure or other biological sewage.
  • the cover will rest on a net, allowing the agitator to be located floating on the liquid surface.
  • the cover may rest on legs or annular supports arranged on the liquid surface so that the agitator is situated within such legs or supports.
  • the method according to the invention is peculiar in that the cover comprises an upper film which is connected with and extends beyond the edge of the reservoir, that a rim area of the film is connected with an area adjacent to the edge, that a film provided beneath is connected with the upper film for forming a chamber, that the chamber is brought to support the upper film by inflating so that it is imparted a vault extending over the edge of the reservoir as the chamber at its underside rest against a part of the reservoir or the liquid therein.
  • the cover comprises an upper film and an inflated chamber provided beneath, it is possible to provide a vault ensuring that the rain hitting the upper side of the upper film runs out over the edge of the reservoir.
  • the inflatable chamber By means of the inflatable chamber, it is possible in a simple way to ensure that the cover maintains an upwardly directed vault. This is regulated by a little pressure provided in the chamber. It is possible to provide the inflatable chamber between two films resting on nets or the like extending over the upper level of the reservoir, e.g. at level with the upper edge of the reservoir. Alternatively, it is possible to form a chamber of an upper and lower film where the lower film is resting directly on the liquid surface.
  • the cover is suited for used by collecting gases exuding from the liquid manure, e.g. by biological gasification, by aerating, by nitrification or by other processes when the cover is connected airtight with the reservoir.
  • the collecting may occur through air locks mounted in the cover and which may be opened and closed manually or by means of control systems opening and closing in dependence of gas concentration, gas pressure or other parameters.
  • venting means are provided. These venting means may let out a certain amount of air as the liquid level in the reservoir is rising. Venting means may thus comprise means for registering the liquid level in the reservoir, which are regulating the ventilation as a result of this regulation.
  • a particular simple embodiment comprises the venting means in a float resting on the liquid surface and which is connected with a spring biased valve.
  • the float opens the valve via a rod connection and empties a part of the air in the chamber when the liquid level and thereby the float are lifted, and pushes with a force overcoming the spring force in the valve due to the force of buoyancy acting on the float.
  • it is possible to adjust the pressure in the chamber so that the upper film will constantly maintain a vault extending with the edge of the reservoir and thereby ensuring that rain water is not collected at the top of the upper film but runs out over the edge of the reservoir.
  • the chamber is resting on a support construction mounted permanently in the reservoir, it is possible to provide a simple roof construction.
  • By providing the inflatable chamber between two layers of film it is possible to distend the film and to inflate it when it is resting on the net.
  • no great requirements to the strength in the support construction On the basis thereof it is possible to use a net or the like which is distended over the reservoir.
  • venting means are not necessary as the chamber may maintain a permanently inflated pressure.
  • the chamber may be formed by a lower film being fastened to the upper film along an edge area thereof.
  • the film may have any shape adapted to the reservoir.
  • the film may thus be round, oval or polygonal depending on the shape of the reservoir.
  • the lower film may have any shape enabling formation of a chamber which keeps the other film distended with its vaulted configuration over the reservoir.
  • the lower film is preferably provided with a dimension approximating the inner area of the reservoir and is fastened to the upper film at its edge area.
  • the lower film may only be provided over a central part and/or as several columnar chambers which are provided by using several lower films forming separate inflatable chambers which are resting on liquid surface and/or a supporting construction secured to the reservoir. It is also possible to use an annular downwardly directed part which has the shape as one or more annular chambers abutting on the inner side of the side wall of the reservoir.
  • the film is preferably formed of one or more pieces of material made into shape.
  • the lower film with have less elasticity than the upper film.
  • the cover is peculiar in that the reservoir is formed with largely vertical, freely standing walls, and that the fastening edge of the reservoir comprises an annular collar which is clamped on the outer side of the reservoir and comprises fastening means in the shape of rings or similar which are interact- ing with corresponding fastening means in the shape of hooks or similar formed in the edge area of the upper film.
  • the cover is very light, it will be necessary to have a suitable fastening to the reservoir or an area bordering on the reservoir. Alternatively, it is also possible to avoid the collar and to perform a fastening with fastening means, e.g. hooks, rings or the like which are fastened directly at the edge of the reservoir and/or the side wall of the reservoir.
  • the fastening of the cover may occur by using elastic straps which are e.g. known from fastening tarpaulins on lorries. Alternatively, the fastening may be established by means of an elastic rope which is passed through eyelets in cover and reser- voir. Alternatively, by inflating an annular chamber formed by a downwardly directed part of the cover there may be formed a fastening of the cover which is only established by friction between the cover and the inner side of the side wall of the reservoir.
  • a reservoir there is preferably provided openings for passages and equipment, as e.g. pumps, aerators, drain-pipes and supply pipes and the like which may be necessary for using the container.
  • the film will be provided in close connection with an equipment.
  • the close connection may preferably be provided by using an upwardly directed elastic collar enclosing the equipment and which is welded, bonded, or in similar way fastened to the upper film.
  • the cover and the reservoir occurs very simply by the upper film with an inflatable chamber provided beneath being connected with and extending beyond the edge of the reservoir.
  • the rim area of the film is connected with an edge area of the upper side of the reservoir.
  • the chamber is then inflated and brought to support on the liquid surface and/or a solid support on the reservoir until the upper film assumes the desired vaulted shape over the edge of the reservoir. If the chamber is resting directly on the liquid surface, by empty reservoir it will be inflated so that it is approximately extends toward the bottom of the reservoir.
  • venting means there is provided ventilation of the chamber corresponding to the rise in the liquid level so that the upper film retains its vaulted configuration and without an unsuitable high pressure is formed in the chamber.
  • film any plastic and/or rubber film with or without reinforcements. Also, the case may be impregnated canvas or other means enabling security against penetration of rain water. If the film is used directly for forming the inflatable chamber, the film is simultaneously to be of a kind which is airtight.
  • the support provided by the inflatable chamber not only ensures draining of rain water but additionally is dimensioned with such strength as to withstand snow pressure in area with risk of snow.
  • the cover With the film according to the invention it is suitable that the support provided by the inflatable chamber not only ensures draining of rain water but additionally is dimensioned with such strength as to withstand snow pressure in area with risk of snow.
  • plastic films small friction is attained, enabling great self-cleaning effect for snow layers on top of the cover.
  • Fig. 1 shows a side view of a first embodiment of a reservoir and a cover according to the invention
  • Fig. 2 shows a view from above of the cover and reservoir in Fig. 1,
  • FIGS. 3-5 show views corresponding to Fig. 1 for illustrating alternative embodiments for cover and reservoir according to the invention
  • Fig. 6 shows a perspective view for illustrating a further embodiment for a cover and a reservoir according to the invention
  • Fig. 7 shows a view corresponding to Fig. 1 for illustrating an embodiment with an airtight cover.
  • the side walls 2 have an upper edge area 5.
  • a cover 6 comprising an upper film 7 which is provided with an upward directed vaulted shape.
  • a lower film 8 is fastened at its edge region 9 in an airtight manner to the under side of the upper film 7 so that an inflatable chamber is formed.
  • the chamber 10 may be inflated by means of pump and inflating valve (not shown).
  • the upper film 6 rest at a rim area 11 which possibly may be provided with suitable reinforcements on the rim area 5 of the reservoir.
  • fastening means 13 in the shape of hooks interacting with eyelets 14 which are fastened on the upper edge area of the side walls 2.
  • the hooks may be fastened on a collar 15 as schematically illustrated in Fig. 3.
  • the inflatable chamber is connected with venting means 16. These comprise a valve
  • valve 17 which is biased by a spring 18 towards its closed position.
  • the valve 17 is connected with a float 20 resting on the liquid surface.
  • the force of buoyancy will surmount the force in the spring 18 and be opened so that a part of the air may escape from the chamber 10.
  • a balancing of the spring force and the force of buoyancy occurs so that the valve 17 is closed again.
  • the establishment of a pressure in the chamber 10 within predetermined limits which are determined by dimensioning of springs 18 and size of floats 20.
  • Fig. 2 the upper film 7 is illustrated as seen from above. With stippled lines are indicated separating lines 21 between separate pieces of material 22 shaped for providing the desired vaulted form. Alternatively, the upper film 7 may be provided in one piece. It is also possible to provide the pieces of material 22 as webs of material ex- tending in parallel.
  • openings 23 which are intended for the passage of equipment for use in the reservoir 1. If t e reservoir 1 is a liquid manure tank, such equipment may comprise supply pipe, drain-pipe, aerator, agitator, and the like. At the lead-ins there may be provided sealings in the form of collars fastened around the equipment and to the upper film 7. If the openings 23 are formed in a rim area outside the chamber 10, such a sealing will be unnecessary.
  • the rain water may be collected in containers for use in irrigation, high pressure flushing of machines and equipment and cleaning of stables and the like.
  • the rain water may be led directly to recipient.
  • Fig. 3 is illustrated an embodiment where the cover is resting on a net 25 distended at the upper edge 5 of the reservoir.
  • the net may be formed of plastic, metal or rope. It does not need to have great strength as the support construction 6 is very light. In this embodiment there will be no need for venting means.
  • the cover 6 When the chamber 10 is inflated, the cover 6 will form a firm, vaulted upper side without need for regulation depending on the liquid level 4 in the reservoir 1.
  • Fig. 4 differs from Fig. 1 in that the chamber 10 is provided with a relatively limited dimension and is forming approximately a central column for the upper film 7.
  • Fig. 5 differs from Figs. 1 and 4 by several chambers 10 being provided, e.g. in a number of four, which are providing a column effect supporting the upper film 7 so that it maintains its vaulted shape.
  • the venting means are omitted for the sake of clarity.
  • Fig. 6 shows a further embodiment where the upper film has been omitted.
  • the chamber is formed by an annular hose 26 that may rest directly on the liquid surface or on a net in the reservoir 1.
  • the annular hose 26 is connected with a number of upwardly extending hoses 27 forming a vaulted support structure.
  • four upwardly extending hose sections 27 are provided.
  • the hose 26 and the hose sections 27 may be mutually connected or may be formed with separate chambers.
  • an upper film 7 (not shown) which is fastened in a way corresponding to that shown in the other Figures.
  • Fig . 7 shows a reservoir 1 where the cover 6 is resting on the liquid surface 4 via an annular chamber 10.
  • the downwardly directed part 10' of the chamber is arranged so that it presses against the inner side of the side wall 2 of the reservoir.
  • the downwardly directed part 10' thus contributes to sealing the interspace 28 formed inside under the cover 6.
  • the downwardly directed part is, as indicated with stippled lines
  • Tins ensures that venting occurs stepwise, whereby is ensured that the downwardly directed part 10' will collapse or bend in the desired positions.
  • an aerator 29 in the surface layer of the liquid. This aerator 29 aerates the liquid manure for nitrifying and homogenising the liquid in the reservoir.
  • an air lock 30 which via a pipe 31 leads gases to an external container (not shown).
  • the cover 6 is connected to the upper edge area 5 of the reservoir 1 at its edge area 32 by a sealing means 33, e.g. a soft plastic or rubber hose which establishes an airtight connection as the edge area 32 of the cover 6 is clamped to the edge area 5 of the reservoir with a clamping means 34 clamping the film firmly against the outer side of the sealing means 33.
  • the cover is provided with fastening stays 35 which may be provided in a number between 4 and 60, preferably between 8 and 16 for normal liquid manure tanks.
  • the distance between stays will preferably be 1 - 10 m. Only it is to be ensured that the stays are securing a permanent clamping to edge area of reservoir. I.e. in large reservoirs as e.g. liquid manure lagoons that may be between 300 and 500 m long, there may be a greater number of stays.
  • the net 25 may be fastened to the stays 35.
  • the stays 35 are fastened in anchor points 36 outside the reservoir, e.g. earth rods or earth anchors.
  • anchor points 36 e.g. earth rods or earth anchors.
  • the reservoir 1 may alternatively have a polygonal cross-section and not a circular cross-section as illustrated.
  • the reservoir 1 may have an oval shape.
  • the cover is provided with an inflatable chamber imparting the upper film 7 with the necessary vault for rain water to be led away from the container so that it is avoided that rain water is collected on the surface and necessitate use of pump means or similar for removing rain water from the upper side of the film. Also, the connection between cover and reservoir is pref- erably to be airtight.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental Sciences (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Bag Frames (AREA)

Abstract

La présente invention concerne un couvercle flottant destiné à un réservoir à liquide ouvrant par le haut, une zone du bord du couvercle étant en liaison avec le bord du réservoir. Le couvercle comprend un film supérieur dépassant les bords du réservoir. Une zone du rebord lui appartenant est en liaison avec une zone adjacente du bord. Le film supérieur repose sur une chambre gonflable ménagée en dessous, ce qui donne au film supérieur une forme en voûte dépassant en hauteur le bord du réservoir et reposant sur une partie du réservoir ou du liquide qu'il convient.
PCT/DK2001/000376 2000-05-30 2001-05-30 Couvercle flottant, reservoir equipe d'un tel couvercle, et procede de couverture d'un tel reservoir WO2001092137A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63770/01A AU6377001A (en) 2000-05-30 2001-05-30 Floating cover, reservoir comprising such a cover and method for covering such reservoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200000853A DK200000853A (da) 2000-05-30 2000-05-30 Flydende overdækning, reservoir omfattende en sådan overdækning samt en fremgangsmåde til hindring af regnvands nedtrængning i et sådan reservoir
DKPA200000853 2000-05-30

Publications (1)

Publication Number Publication Date
WO2001092137A1 true WO2001092137A1 (fr) 2001-12-06

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ID=8159530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2001/000376 WO2001092137A1 (fr) 2000-05-30 2001-05-30 Couvercle flottant, reservoir equipe d'un tel couvercle, et procede de couverture d'un tel reservoir

Country Status (3)

Country Link
AU (1) AU6377001A (fr)
DK (1) DK200000853A (fr)
WO (1) WO2001092137A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877964A1 (fr) * 2004-11-17 2006-05-19 Andre Chauveau Dispositif de couverture de bassin de reception de liquide
FR2877963A1 (fr) * 2004-11-17 2006-05-19 Andre Chauveau Dispositif generateur d'air et dispositif de couverture associe a un tel dispositif generateur d'air
EP1658762A1 (fr) 2004-11-17 2006-05-24 André Chauveau Dispositif de couverture de bassin de réception de liquide et dispositif générateur d'air associé à un tel dispositif
ES2368634A1 (es) * 2009-04-07 2011-11-21 Universidad De Vigo Sistema flotante para la captación de biogás.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108529030B (zh) * 2018-06-15 2024-03-01 江苏龙禾轻型材料有限公司 全接液焊接式内浮盘

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533110A (en) * 1969-02-25 1970-10-13 Joseph G Gisondi Swimming pool cover
US3608099A (en) * 1969-10-20 1971-09-28 Domain Ind Inc Swimming pool cover
DE2427815A1 (de) * 1974-06-08 1976-01-02 Universa Handels Gmbh Abdeckung, insbesondere fuer der witterung ausgesetzte behaelter
US4953239A (en) * 1988-08-24 1990-09-04 Gadsby Harold S Inflatable pool cover
FR2652373A1 (fr) * 1989-09-26 1991-03-29 Azur Inter Services Couverture et dispositifs de protection par enveloppe gonflable pour des bassins tels que des piscines.
US5144704A (en) * 1990-11-01 1992-09-08 Genzel Charles C J Swimming pool cover with multiple air compartments
US5373590A (en) * 1992-05-13 1994-12-20 Svae; Bjorn Spa cover

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533110A (en) * 1969-02-25 1970-10-13 Joseph G Gisondi Swimming pool cover
US3608099A (en) * 1969-10-20 1971-09-28 Domain Ind Inc Swimming pool cover
DE2427815A1 (de) * 1974-06-08 1976-01-02 Universa Handels Gmbh Abdeckung, insbesondere fuer der witterung ausgesetzte behaelter
US4953239A (en) * 1988-08-24 1990-09-04 Gadsby Harold S Inflatable pool cover
FR2652373A1 (fr) * 1989-09-26 1991-03-29 Azur Inter Services Couverture et dispositifs de protection par enveloppe gonflable pour des bassins tels que des piscines.
US5144704A (en) * 1990-11-01 1992-09-08 Genzel Charles C J Swimming pool cover with multiple air compartments
US5373590A (en) * 1992-05-13 1994-12-20 Svae; Bjorn Spa cover

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877964A1 (fr) * 2004-11-17 2006-05-19 Andre Chauveau Dispositif de couverture de bassin de reception de liquide
FR2877963A1 (fr) * 2004-11-17 2006-05-19 Andre Chauveau Dispositif generateur d'air et dispositif de couverture associe a un tel dispositif generateur d'air
EP1658762A1 (fr) 2004-11-17 2006-05-24 André Chauveau Dispositif de couverture de bassin de réception de liquide et dispositif générateur d'air associé à un tel dispositif
ES2368634A1 (es) * 2009-04-07 2011-11-21 Universidad De Vigo Sistema flotante para la captación de biogás.

Also Published As

Publication number Publication date
AU6377001A (en) 2001-12-11
DK200000853A (da) 2001-12-01

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