EP1158852A1 - Equipment for flat-bottom floating cage - Google Patents

Equipment for flat-bottom floating cage

Info

Publication number
EP1158852A1
EP1158852A1 EP00905474A EP00905474A EP1158852A1 EP 1158852 A1 EP1158852 A1 EP 1158852A1 EP 00905474 A EP00905474 A EP 00905474A EP 00905474 A EP00905474 A EP 00905474A EP 1158852 A1 EP1158852 A1 EP 1158852A1
Authority
EP
European Patent Office
Prior art keywords
fish
base
flat
floating
ring
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.)
Withdrawn
Application number
EP00905474A
Other languages
German (de)
French (fr)
Inventor
Svein Harald J Rgensen
Kjell Midling
K Re Aas
Jonny Pettersen
Roy Tore Eliassen
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.)
Refa AS
Original Assignee
Refa AS
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 Refa AS filed Critical Refa AS
Publication of EP1158852A1 publication Critical patent/EP1158852A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Definitions

  • Cod fish which is captured for feeding and stocking as live fish may suffer from a blown up swimming bladder This is a required condition when fishing
  • the cod's swimming bladder may however be restored to its original state if the fish is allowed to rest on a flat surface for one or two days
  • the cod then becomes pelagic and can be transferred to an "ordinary" fish cage
  • Flat-bottom cages with a liftable and lowerable base and a fish pen which rests on the base allow offshore fish-farming with all the operational advantages which this has to offer compared to onshore fish farming in tanks or ponds
  • the possibility of lifting the base of the cage or of the fish pen to a level which allows people to walk on the bottom renders the tasks of tending, controlling and sorting the fish easy and effective
  • Patent NO-303 313 describes a solution consisting of a flat-bottom fish cage comprising a trampoline base which forms a flat support for the fish pen
  • the trampoline base is obtained with the help of an outer circular bottom ring and an inner stay ring while, concentric with these, a center ring is provided Between these rings, stays are provided to keep the structure stretched and create the trampoline base on which the fish pen rests
  • the center ring is part of a tensioning system for the net bottom, such system consisting of a base ring closer to the sea bed and rigidly fixed to the center ring with the help of rods
  • stays are provided between the bottom ring and the base ring
  • the bottom ring is attached to a floating ring with the help of wires (stays or slide rods)
  • the fish pen is fastened to the floating ring and is sliding vertically along the wires so that it is possible to lift and lower the fish pen relative to the floating ring, thus making the bottom of the pen vertically displaceable in the water
  • the center tensioning device for the base net is also too complicated to be of any practical utility.
  • the trampoline base and its tensioning mechanism are too complex and costly to manufacture.
  • the object of the present invention is to provide a flat-bottom floating fish cage system which is less complicated to operate and to use with regard to tending the fish and cleaning the cage.
  • Figure 1 illustrates the complete floating cage with floating ring, base and fish pen.
  • Figure 2 is a horizontal view of the base ring with the centre tank.
  • Figure 3 shows a vertical section of the base ring with the centre tank.
  • Figure 4 illustrates the base attached to the floating rings.
  • the floating cage system consists of floating rings 1 , a base 2 with between these vertical slide rods 3 and wires 4. Inside this framework defined by the said components, and resting on the base 2, is a fish pen 5.
  • the base 2 functions as a support for the fish pen 5 and contributes to shaping it such as to obtain a flat bottom.
  • the base 2 must be taut enough for people to walk on it.
  • Figure 2 illustrates how the base 2 may be shaped.
  • An outer frame for the base 2 is provided by a base ring 6 which is polygonal. From each angle 7 of the polygon and stretching to a centre point 8 on a centre tank 9 are top stays 10 which can be stretched in order to obtain the necessary base for the fish pen 5.
  • the centre tank 9 is positioned vertically and is fastened from the bottom points 1 1 of the centre tank 9. closest to the sea bed. to the base ring 6 with the help of base stays 12.
  • the centre tank 9 acts as an anchor point for the stays 10, 12 and contributes to obtaining a taut base 2
  • An optional arrangement would be for the stays 10, 12 to be attached in the centre somewhat off the centre tank 9, for instance to a ring- or cylinder-shaped element, the centre tank 9 being positioned inside such an element
  • the centre tank 9 may be partly filled with water and air or gas to the required quantities to obtain additional buoyancy
  • the quantities required are controlled by valves and a control device placed on floating units on the floating rings or in their vicinity
  • the slide rods 3 are fixed to the floating ⁇ ngs 1 and are anchored at their lower extremity close to the base 2 with mooring blocks 13
  • the slide rods 3 run through a first set of loops 14 fastened to the periphery of the base ring 6, and through a second set of loops 15 which are fixed vertically along the fish pen 5 Between the loops 15 floats 16 are provided, these being threaded on the slide rods
  • Wires 4 are fixed to the floating rings 1 and to the base ring 6 and are also fastened to the fish pen 5 in several places between the floating rings 1 and the base 2, in a manner similar to the slide rods 3
  • the base 2 is lifted by filling the centre tank 9 with a sufficient quantity of air As the base 2 lifts, so does the fish pen 5 rising towards the floating rings 1 assisted by the buoyancy effect of the floats 16
  • the quantity of air filled in the centre tank 9 can be such that, when the base 2 rises to for instance 0,5 to 1,0 m below the floating rings 1, it reaches a ponderal equilibrium and the fish farmers can walk on the base 2 in order to carry out their tasks
  • the wires 4 are provided with tension reducing devices 17 to reduce the hydrodynamic effect of the waves
  • the slide rods 3 reduce the hydrodynamic effect of the waves by moving vertically in the loops 14
  • any combination of slide rods 3 and of wires 4 may be chosen, for instance both types alternating all around, or all elements may be of the same type

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Surgical Instruments (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

Floating rings (1) with a base (2) and intermediary slide rod (3) and wire (4), and a fish pen (5) fastened to the floating ring (1) and resting on the base (2). A polygonal base ring (6) with angles (7) and a centre tank (9) and stays (10, 12) stretched in between. The centre tank (9) can be filled with a required mixture of fluid and of gas in order to obtain the necessary buoyancy to lift the base (2). To the floating rings (1) are fastened slide rods (3) weighted by mooring blocks (13) at the opposite extremity, and wires (4) attached to the base ring (6). A second set of loops (15) is fastened to the fish pen (5) and slide along the slide rods (3). Floats (16) are positioned between the loops (15).

Description

EQUIPMENT FOR FLAT-BOTTOM FLOATING CAGES
The present invention relates to a system for flat-bottom floating cages especially with a view to obtaining a flat and stable bottom structure with the possibility of lifting or lowering said bottom to the desired depth It must also be possible for people to walk on the bottom structure when this is lifted to the surface Lifting and lowering are effected pneumatically from the surface
Fish farming has nowadays become a major industry The main volume and revenues come today from the farming of anadromous species such as salmon, sea trout and char It is anticipated that marine species will take a much larger place in the conventional farming industry in the years to come Halibut, catfish and turbot are species which seem to awaken the greatest interest for fish farming in the future These are demersal species which live and remain most of the time on the sea floor The present research and experience in farming of such species is restricted to raising the fish in longitudinal flow troughs or fish-raising ponds on shore This technology is mostly suitable for fry or for small individuals in the early stages of fish production for the food industry This onshore technology will become very costly for fish production for the food industry in regard to water, space and energy requirements New solutions such as flat-bottom cages should be implemented in order to operate financially profitable farming of halibut, catfish and turbot (offshore farming) In addition, a new requirement will arise for stocking and feeding of wild fish captured alive such as halibut, catfish, flounder and cod as well as sea creatures such as king crab, sea urchins and the like Flat- bottom cages are particularly well suited to meet these requirements
Cod fish which is captured for feeding and stocking as live fish may suffer from a blown up swimming bladder This is a required condition when fishing The cod's swimming bladder may however be restored to its original state if the fish is allowed to rest on a flat surface for one or two days The cod then becomes pelagic and can be transferred to an "ordinary" fish cage Flat-bottom cages with a liftable and lowerable base and a fish pen which rests on the base allow offshore fish-farming with all the operational advantages which this has to offer compared to onshore fish farming in tanks or ponds The possibility of lifting the base of the cage or of the fish pen to a level which allows people to walk on the bottom renders the tasks of tending, controlling and sorting the fish easy and effective
Patent NO-303 313 describes a solution consisting of a flat-bottom fish cage comprising a trampoline base which forms a flat support for the fish pen The trampoline base is obtained with the help of an outer circular bottom ring and an inner stay ring while, concentric with these, a center ring is provided Between these rings, stays are provided to keep the structure stretched and create the trampoline base on which the fish pen rests The center ring is part of a tensioning system for the net bottom, such system consisting of a base ring closer to the sea bed and rigidly fixed to the center ring with the help of rods To further stabilize the system vertically, stays are provided between the bottom ring and the base ring The bottom ring is attached to a floating ring with the help of wires (stays or slide rods) The fish pen is fastened to the floating ring and is sliding vertically along the wires so that it is possible to lift and lower the fish pen relative to the floating ring, thus making the bottom of the pen vertically displaceable in the water The stay ring consists of two horizontal rings, an outer stay ring and an inner stay ring, positioned at a certain distance from one another Between those two stay rings a lift ring is provided which can be filled with compressed air or gas, thus altering its buoyancy and permitting the lifting or lowering operation of the trampoline base on which the fish pen rests
The system described in NO-303 313, which consists in lifting and lowering the trampoline base with a bottom ring, stay πngs and center ring, turns out to be somewhat complex technically to have any practical use In addition, the center tensioning device for the base net is also too complicated to be of any practical utility. The trampoline base and its tensioning mechanism are too complex and costly to manufacture. The object of the present invention is to provide a flat-bottom floating fish cage system which is less complicated to operate and to use with regard to tending the fish and cleaning the cage.
This is achieved with the help of a polygonal base ring attached through a first set of loops to a number of slide rods which at one end are fixed to the floating rings and at the opposite extremity to a mooring block, the fish pen being able to slide along the slide rods with the help of a second set of loops, and where stays are fixed to the floating rings and at the opposite extremity to the base ring.
Further details of the invention appear from the following description with reference to the illustrations of a preferred embodiment of the invention. Figure 1 illustrates the complete floating cage with floating ring, base and fish pen.
Figure 2 is a horizontal view of the base ring with the centre tank. Figure 3 shows a vertical section of the base ring with the centre tank. Figure 4 illustrates the base attached to the floating rings. The floating cage system consists of floating rings 1 , a base 2 with between these vertical slide rods 3 and wires 4. Inside this framework defined by the said components, and resting on the base 2, is a fish pen 5.
The base 2 functions as a support for the fish pen 5 and contributes to shaping it such as to obtain a flat bottom. The base 2 must be taut enough for people to walk on it. Figure 2 illustrates how the base 2 may be shaped. An outer frame for the base 2 is provided by a base ring 6 which is polygonal. From each angle 7 of the polygon and stretching to a centre point 8 on a centre tank 9 are top stays 10 which can be stretched in order to obtain the necessary base for the fish pen 5. The centre tank 9 is positioned vertically and is fastened from the bottom points 1 1 of the centre tank 9. closest to the sea bed. to the base ring 6 with the help of base stays 12. In this manner, the centre tank 9 acts as an anchor point for the stays 10, 12 and contributes to obtaining a taut base 2 An optional arrangement would be for the stays 10, 12 to be attached in the centre somewhat off the centre tank 9, for instance to a ring- or cylinder-shaped element, the centre tank 9 being positioned inside such an element
The centre tank 9 may be partly filled with water and air or gas to the required quantities to obtain additional buoyancy The quantities required are controlled by valves and a control device placed on floating units on the floating rings or in their vicinity
The slide rods 3 are fixed to the floating πngs 1 and are anchored at their lower extremity close to the base 2 with mooring blocks 13 The slide rods 3 run through a first set of loops 14 fastened to the periphery of the base ring 6, and through a second set of loops 15 which are fixed vertically along the fish pen 5 Between the loops 15 floats 16 are provided, these being threaded on the slide rods
3 sliding freely along said slide rods 3 between the loops 15
Wires 4 are fixed to the floating rings 1 and to the base ring 6 and are also fastened to the fish pen 5 in several places between the floating rings 1 and the base 2, in a manner similar to the slide rods 3 The base 2 is lifted by filling the centre tank 9 with a sufficient quantity of air As the base 2 lifts, so does the fish pen 5 rising towards the floating rings 1 assisted by the buoyancy effect of the floats 16 The quantity of air filled in the centre tank 9 can be such that, when the base 2 rises to for instance 0,5 to 1,0 m below the floating rings 1, it reaches a ponderal equilibrium and the fish farmers can walk on the base 2 in order to carry out their tasks
The wires 4 are provided with tension reducing devices 17 to reduce the hydrodynamic effect of the waves The slide rods 3 reduce the hydrodynamic effect of the waves by moving vertically in the loops 14
Around the periphery of the floating ring 1, any combination of slide rods 3 and of wires 4 may be chosen, for instance both types alternating all around, or all elements may be of the same type

Claims

1 Equipment for flat-bottom floating cage for fish equipped with a floating ring, a base ring, wires which are fastened between the two, and having a fish pen attached to the wires and hanging from the floating ring, the fish pen resting on a base (2) and said base (2) being provided with a tensioning device characterized by a polygonal base ring (6) fastened with the help of a first set of loops (14) to a number of slide rods (3), said slide rods (3) being themselves fixed at one extremity to the floating rings (1) and at the opposite extremity to a mooring block (13), the fish pen (5) attached to and sliding along the slide rods (3) with the help of a second set of loops (15) and where wires (4) are fastened to the floating rings (1) at one end and to the base ring (6) at the opposite end 2. The equipment for flat-bottom floating cage for fish of the previous claim characterized in that the polygonal base ring (6) has a number of angles (7) from which top stays (10) are fastened and run to top points (8) positioned at least in the vicinity of a centre tank (9), and base stays (12) are fastened from said angles (7) and stretch to bottom points (11) positioned at least in the vicinity of said centre tank (9)
3 The equipment for flat-bottom floating cage for fish of claim 2 characterized in that the centre tank (9) can be filled with a mixture of gas and fluid and emptied.
4 The equipment for flat-bottom floating cage for fish of claim 3 characterized in that filling and emptying of the centre tank (9) may be effected from a control device positioned on or in the vicinity of the floating rings (1)
5 The equipment for flat-bottom floating cage for fish of claim 2 characterized in that the top points (8) and the bottom points (11) are positioned on the centre tank (9) 6 The equipment for flat-bottom floating cage for fish of claim 2 characterized in that the top points (8) and the bottom points (11) are positioned on a ring-shaped or cylinder-shaped element provided on the outside of the centre tank (9)
7 The equipment for flat-bottom floating cage for fish of claim 1 characterized in that slide rods (3) only are provided. 8 The equipment for flat-bottom floating cage for fish of claim 2 characterized in that wires (4) only are provided
EP00905474A 1999-02-12 2000-02-09 Equipment for flat-bottom floating cage Withdrawn EP1158852A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO19990660A NO311062B1 (en) 1999-02-12 1999-02-12 Device for flat bottom cages
NO990660 1999-02-12
PCT/NO2000/000048 WO2000049858A1 (en) 1999-02-12 2000-02-09 Equipment for flat-bottom floating cage

Publications (1)

Publication Number Publication Date
EP1158852A1 true EP1158852A1 (en) 2001-12-05

Family

ID=19902954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00905474A Withdrawn EP1158852A1 (en) 1999-02-12 2000-02-09 Equipment for flat-bottom floating cage

Country Status (5)

Country Link
EP (1) EP1158852A1 (en)
AU (1) AU2700800A (en)
CA (1) CA2362859A1 (en)
NO (1) NO311062B1 (en)
WO (1) WO2000049858A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109619006A (en) * 2019-02-26 2019-04-16 中国水产科学研究院淡水渔业研究中心 A kind of Eriocheir sinensis winter guarantor cream temporarily feeding equipment and its application

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL152722A0 (en) * 2002-11-10 2004-02-08 Flexible and submersible single point mooring system for offshore fish farming
US20100058991A1 (en) * 2007-05-04 2010-03-11 Aquaculture Engineering Group Inc. Aquaculture System
TW201119572A (en) * 2009-12-15 2011-06-16 Gold Joint Ind Co Ltd Net cage.
NO337241B1 (en) * 2013-02-05 2016-02-22 Akvadesign As Buoyancy system for a cage
NO334957B1 (en) * 2013-05-21 2014-08-04 Aqualine As Aquaculture system.
CN106386615A (en) * 2016-09-18 2017-02-15 安庆建金智能科技有限公司 Hook type cultivation device
CN107711656B (en) * 2017-11-29 2023-02-17 唐山海都水产食品有限公司 Anti-wave marine ranch breeding device
CN109997742A (en) * 2018-08-16 2019-07-12 三门县绿洋特种水产养殖专业合作社 Mud crab cultural method in aquaculture net cage
NO346043B1 (en) * 2019-09-18 2022-01-17 Eide Fjordbruk As Submersible seine system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE446053B (en) * 1984-11-21 1986-08-11 Farmocean Ab DEVICE FOR CULTIVATING FISH IN A NET BOX WHICH IS COLLECTED BY A PONTON WHERE'S DEPARTURE IS VARIABLE
JPS63222632A (en) * 1987-03-13 1988-09-16 日本鋼管株式会社 Fish preserve for ocean breeding
NO173481C (en) * 1991-09-11 1993-12-22 Sinvent As Fish farming and storage facilities and the like in the show
US5299530A (en) * 1992-07-17 1994-04-05 Occidental Research Corporation Submergible fish cage
NO303371B1 (en) * 1996-08-09 1998-07-06 Magne Bolstad Breeding Cage
NO303711B1 (en) * 1996-09-24 1998-08-24 Nyfotek As Cages for aquatic organisms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0049858A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109619006A (en) * 2019-02-26 2019-04-16 中国水产科学研究院淡水渔业研究中心 A kind of Eriocheir sinensis winter guarantor cream temporarily feeding equipment and its application

Also Published As

Publication number Publication date
AU2700800A (en) 2000-09-14
NO990660L (en) 2000-08-14
NO311062B1 (en) 2001-10-08
CA2362859A1 (en) 2000-08-31
WO2000049858A1 (en) 2000-08-31
NO990660D0 (en) 1999-02-12

Similar Documents

Publication Publication Date Title
EP3209124B1 (en) Submersible cage for aquaculture and method of adjusting the depth of said cage
EP0393276B1 (en) Spar buoy pen system
JP2019512223A (en) Semi-submersible aquaculture system
DK180520B1 (en) Floating device for fish and shellfish farming
NO20170825A1 (en) Method and apparatus for aquaculture feeding
CN106417130A (en) Steel-structure net cage for breeding marine shellfish and stereoscopic breeding system
KR102146159B1 (en) Submergible fish cage having double buoys and net made of multiple materials
EP0146518A2 (en) Fish breeding plant comprising at least one tank submergible to the desired depth and having an air chamber
WO2020013703A1 (en) Cage for fish farming
WO2000049858A1 (en) Equipment for flat-bottom floating cage
WO2001052638A1 (en) Device for anchoring floating cages for fish, fish pots and cages
KR101947319B1 (en) Submersible marine aquaculture apparatus
CA2490575A1 (en) Improved submersible farm
WO2016153356A1 (en) Production-tank
US20220369606A1 (en) Dynamic buoyancy system for submersible pen
NO20030016L (en) Device for fish farming in the high seas
FI100846B (en) Cash dump for storage and breeding of fish
KR101947320B1 (en) The method using submersible marine aquaculture apparatus
CA3208302A1 (en) Submersible fish cage for sea-based fish farming
JP2004305042A (en) Method for cultivating bottom layer fishes such as flounder or turbot on sea bottom and method for feeding the fishes
KR101901014B1 (en) Hanging line type fishery products farming method thereof
CN102499143A (en) Flexible liftable cage
RU180940U1 (en) Used self-floating sectional fish tank cages made of galvanized metal mesh using used tires
WO1998031217A1 (en) Assembly for floating cages for fish
CN204634734U (en) A kind of cast concrete base artificial fish shelter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010907

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030902