WO2023022604A1 - Dispositif d'épandage et procédé de fonctionnement d'un dispositif d'épandage - Google Patents

Dispositif d'épandage et procédé de fonctionnement d'un dispositif d'épandage Download PDF

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Publication number
WO2023022604A1
WO2023022604A1 PCT/NO2022/050198 NO2022050198W WO2023022604A1 WO 2023022604 A1 WO2023022604 A1 WO 2023022604A1 NO 2022050198 W NO2022050198 W NO 2022050198W WO 2023022604 A1 WO2023022604 A1 WO 2023022604A1
Authority
WO
WIPO (PCT)
Prior art keywords
spreader
feed
unit
pipe
housing
Prior art date
Application number
PCT/NO2022/050198
Other languages
English (en)
Inventor
Håvar BJØRNSETH
Vegard BREKKE LØVVIG
Original Assignee
Scale Aquaculture 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
Priority claimed from NO20211282A external-priority patent/NO346986B1/en
Application filed by Scale Aquaculture As filed Critical Scale Aquaculture As
Publication of WO2023022604A1 publication Critical patent/WO2023022604A1/fr

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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
    • A01K61/80—Feeding devices
    • 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

  • the present invention is related to a spreader device and a feed spreader comprising a feed spreader device for spreading feed in farming units for marine creatures such as fish.
  • the present invention further comprises a method for operating such a spreader device and/or feed spreader and the use of such a spreader device and/or feed spreader for spreading of fish feed in a fish pen.
  • Marine creatures for example fish such as salmon
  • farming units can bed open, semi-open or closed for through-flow of seawater.
  • Land based farming units are also becoming more common. These farming units can be quite large and various types of feeding machines or devices have been developed to distribute feed to the marine creatures that are being farmed in the farming units.
  • Such feeding machines usually comprises a feed spreader with a rotatable pipe element where the speed of the feed that is passed through the pipe element which has an outer part arranged at an angle which causes the pipe element to rotate and the feed to spread out over a certain area of the farming unit in which it is placed.
  • Motorized feed spreaders are not commonly used, but an example is shown in NO 325097 B1 where there is disclosed a feed spreader for speading fish feed in a farming unit in the form of a fish pen or fish pond.
  • the feed spreader comprises a spreader pipe which is rotated by a motor and a driving mechanism which connects the motor and the spreader pipe.
  • the driving mechanism can comprise toothed gearing or belt drive. The problem with such driving mechanism is that the motor takes up a fairly large space in the vicinity of the feed spreader and the moving parts are worn down and need to be changed regularly adding to the operating costs.
  • Another known problem for motorized feed spreaders is that the housing in which the motor and the driving mechanism is kept, has turned out to be susceptible to water intrusion which is very detrimental to the motor and the driving mechanism.
  • the maintenance costs of the feed spreader shown in this publication is therefore high and the lifespan is short due to the marine environment that they are operating in and degradation and corrosion that is commonly associated with equipment operating in marine conditions.
  • the feed spreader shown in this publication further has a problem with oil from the feed, i.e. fish oil, also penetrates into the housing of the motor and the driving mechanism, further causing operating problems and increased need for maintenance.
  • an objective of the present invention is to remedy at least one or some of the problems associated with the known feed spreader devices for marine farming units.
  • a further object of the present invention is to reduce the need for maintenance and repair of the feed spreader.
  • Another object of the present invention is to obtain a more efficient and cost- effective way to rotate the tube that spreads the feed into the farming unit.
  • a further object of the present invention was to improve the spreading of the feed in the farming unit.
  • a spreader device for spreading feed in a farming unit for fish or other marine creatures where the spreader device comprises a spreader unit which comprises:
  • an electric motor comprising a rotor and a stator, where the rotor is arranged circumferentially around the feed conduit and is securely attached to the feed conduit, and the stator is arranged in the spreader housing circumferentially around the rotor.
  • the present spreader device is a compact, motorized spreader which can be sealed effectively against intrusion of water and fish oil from the feed.
  • the main idea is to use an electric motor and let it become part of the spreader unit of the spreader device by attaching the rotor of the electric motor to the feed conduit so that the rotor and the feed conduit rotates together and having the stator of the electric motor surrounding the rotor.
  • the electric motor is a brushless electric motor.
  • the spreader device preferably comprises a spreader pipe which is securely attached to the hood element in a watertight manner.
  • the spreader pipe may, for example, be welded to the hood element. A welded joint will obviously provide a completely watertight attachment of the spreader pipe to the hood element.
  • the spreader pipe preferably comprises an outlet feed pipe which is securely attached to the hood element in a watertight manner.
  • the outlet feed pipe may, for example, be welded to the hood element, which will provide the watertight attachment of the outlet feed pipe to the hood element.
  • the spreader device preferably comprises a counterweight pipe which is attached to the outlet feed pipe and/or the spreader pipe, where the counterweight pipe has the same shape and the same weight and weight distribution as the spreader pipe.
  • a counterweight pipe balances out the unbalanced momentum that would have been created if only a spreader pipe, which is non-coaxial with the electric motor, rotates and much sturdier bearings would have to be used to take up the enlarged moments caused by a rotating, unbalanced spreader pipe.
  • the feed conduit may be made up of a central feed pipe unit and the hood element which is attached to the central feed pipe conduit.
  • the central feed pipe unit and the hood element comprise respective central bores, which are preferably coaxial, through which feed can be passed.
  • the central feed pipe unit may comprise at least a lower central feed pipe element and an upper central feed pipe element which is attached to the lower central feed pipe element.
  • the lower central feed pipe element may be attached to the upper central feed pipe element with bolts, screw, welding or any other suitable method that can attach the lower central feed pipe element securely to the upper central feed pipe element.
  • the rotor is attached to the central feed pipe unit, and preferably to the lower central feed pipe element.
  • the spreader housing may comprise a lower housing element, an upper housing element which is attached to the lower housing element, and an inner housing element which is attached to the upper housing element.
  • the lower housing element may be attached to the upper housing element with bolts, screw or any other suitable method that can attach the upper housing element securely to the lower housing element.
  • the upper housing element may be attached to the inner housing element with bolts, screw or any other suitable method that can attach the inner housing element securely to the upper housing element.
  • the spreader unit preferably comprises an upper seal device arranged to provide a seal between the hood element and the spreader housing, preferably between the inner housing element and the hood element.
  • the upper seal device is preferably arranged vertically above a lower edge of the hood element when the spreader unit is arranged in an operating position, i.e. in a position where the rotational axis of the rotor of the electric motor is substantially vertical as long as there is no wind or waves that makes the spreader unit tilt. Arranging the upper seal device in vertically higher position than the lower edge of the hood element helps to prevent water intrusion into the interior of the spreader unit.
  • the hood may be provided with a hood skirt that at least partially overlaps with the spreader housing to prevent water intrusion into the spreader housing.
  • the skirt will extend in an axial direction downwards from the hood element, and completely around the spreader housing in the circumferential direction to prevent water intrusion into the interior of the spreader unit.
  • the lower edge of the hood element will in this case correspond to the lower edge of the hood skirt.
  • the upper seal device is preferably a spring biased, radial oil seal which is preferably adapted to sustain a pressure of at least 10 bar.
  • the spreader unit may further comprise a lower seal device arranged to provide a seal between the feed conduit and the spreader housing, preferably between the lower housing element and the central feed pipe unit, the lower seal device being arranged adjacent a lower edge of the feed conduit. This position of the seal will help prevent intrusion of fish oil from the feed passing through the feed conduit, into the interior of the spreader unit.
  • the lower seal device is preferably a spring biased, radial oil seal which is preferably adapted to sustain a pressure of at least 10 bar.
  • the spreader unit preferably comprises an upper bearing unit and a lower bearing unit which are mounted to the feed conduit and the spreader housing allowing the feed conduit to rotate relative to the spreader housing.
  • the upper bearing unit and the lower bearing unit are both arranged between the upper sealing element and the lower sealing element to prevent intrusion of water and/or fish oil into the upper and lower bearing units.
  • feed spreader for spreading feed in a farming unit for fish or other marine creatures, the feed spreader comprising a spreader device as described above, comprising one, some or all of the features mentioned, where the feed conduit of the spreader unit is attached to a supply of the feed.
  • the feed spreader preferably comprises a floater unit on which the spreader unit is mounted.
  • the floater unit preferably comprises a feed pipe element which is mounted to the spreader unit and is further adapted to be attached to the supply of feed.
  • a method for operating a spreader device as described above comprising one, some or all of the features mentioned, and/or a feed spreader as described above, comprising one, some or all of the features mentioned, for spreading of feed in a farming unit for fish or other marine creatures, where the spreader pipe is rotated in a direction in which the feed leaves the outlet of the spreader pipe. It has been found that rotating the spreader pipe in the rotational direction in which the outlet of the spreader pipe at least partially is facing enhances significantly a more even spread of the feed across the water surface of the farming unit.
  • a spreader device as described above, comprising one, some or all of the additional features mentioned, and/or a feed spreader as described above, comprising one, some or all of the additional features mentioned, for spreading of feed in a farming unit for fish or other marine creatures, for spreading fish feed in a fish pen.
  • a typical use of the spreader device according to the present invention and/or a feed spreader according to the present invention would be for spreading feed in a fish pen in which salmon are being farmed.
  • Figure 1 is an isometric view of a feed spreader according to the present invention
  • Figure 2 is a front view of the feed spreader shown in figure 1 .
  • FIG 3 is an isometric view of a feed spreader according to the present invention as shown in figures 1 and 2, but where the outlet of the spreader pipe is turned in the opposite direction.
  • Figure 4 is a front view of the feed spreader shown in figure 3.
  • Figure 5 is a left view of the feed spreader shown in figures 3 and 4.
  • Figure 6 is a top view of the feed spreader shown in figures 3-5.
  • Figure 7 shows an enlarged portion of a part the feed spreader shown in figure 3 with a more detailed view of the spreader unit.
  • Figure 8 shows an enlarged portion of a part the feed spreader shown in figure 5 with a more detailed view of the spreader unit.
  • the figures 1-8 discloses an embodiment of the present invention comprising a feed spreader 10 which is adapted to be used spread feed in a farming unit for fish or other marine creatures.
  • the feed spreader 10 may be arranged in a fish pen in which fish, such as salmon, is farmed.
  • the farming unit may be arranged in the sea offshore.
  • the farming unit may be a landbased farming unit.
  • the feed spreader 10 shown in this embodiment of the present invention is provided with a floater unit 11 which allows the feed spreader to float on the water and to be positioned in any desired place in the farming unit.
  • the floater unit 11 is provided with at least one, but preferably a plurality of attachment points 13, for example four attachment points 13 as indicated in the figures, to which suitable anchor lines can be attached in order to safely anchor the feed spreader 10 in a desired position within the farming unit.
  • the feed spreader 10 is provided with a spreader device 57 comprising a spreader unit 14.
  • the spreader unit 14 is preferably attached to the floater unit 11 at a central portion of the floater unit 11. The central portion of the floater unit
  • the floater unit 11 is further provided with a feed pipe element 12 which is arranged within the floater unit 11 and extends from the spreader unit 14, where it is fluidly connected to a feed conduit 37 in the spreader unit 14 as will be further explained below, and to a peripheral opening in the floater unit 11 where an attachment coupling unit 54 is attached to the end of the feed pipe element
  • the feed is preferably supplied through a pipeline which in one end can be detachably connected to the attachment coupling unit 54.
  • the pipeline is, in the other end, connected to a storage facility for feed, such as a feed tank or any similar device capable of storing a sufficient amount of feed.
  • the spreader device 57 is further provided with a spreader pipe 41 which is attached to the spreader unit 14 and is fluidly connected to the feed conduit 37 in the spreader unit 14.
  • the spreader pipe is provided with an outlet 42 through which the feed exits the feed spreader 10 and is spread out in the farming unit where the feed spreader 10 is arranged.
  • An outer portion of the spreader pipe 41 is preferably bent so that the outlet 42 of the spreader pipe 41 at least partially faces the rotational direction of the spreader pipe. It has been found that this configuration of the outlet 42 of the spreader pipe enhances the spreading of the feed during operation of the feed spreader 10.
  • the outer portion of the spreader pipe 41 can be bent so that the outlet 42 faces in the opposite direction of the rotational direction of the spreader pipe 41 during operation of the feed spreader 10.
  • a continuous conduit for feed is created for conducting feed from a storage facility through a pipeline which is fluidly connected to the feed pipe element 12 of the feed spreader 10 at the attachment coupling unit 54, further through the feed pipe element 12 and the feed conduit 37 and finally through the spreader pipe 41 and out of the outlet 42 of the spreader pipe 41.
  • the spreader device 57 is preferably further provided with a counter weight pipe 43 which is, together with the spreader pipe 41 , attached to an outlet feed pipe 39 which is attached to the spreader unit 14.
  • the counter weight pipe 43 is preferably made as identical to the spreader pipe 41 as possible, i.e. the counter weight pipe 43 is as close as possible to being rotationally symmetric to the spreader pipe 41 and having the same weight distribution. Such a configuration of the spreader pipe 41 and counter weight pipe 43 will reduce the load on bearings in the spreader unit 14 and therefore smaller bearings can be used and the need for maintenance is reduced.
  • the counter weight pipe 43 preferably does not conduct feed and is included only to act as a counterweight to the spreader pipe 41 during operation of the feed spreader 10 when the spreader pipe 41 , and the counter weight pipe 43, are rotated to spread the feed in the farming unit.
  • the spreader unit 14 comprises a feed conduit 37 that passes through the spreader unit 14 centrally and is made up of a central feed pipe unit 44 and a hood central bore 24 through a hood element 22 arranged on top of the spreader unit 14.
  • the central feed pipe unit 44 comprises a lower central feed pipe element 28 with a lower central bore 29 and an upper central feed pipe element 26 with an upper central bore 27 arranged above and next to the lower central feed pipe element 28 such that there is a continuous conduit for feed through the central feed pipe unit 44.
  • the hood element 22 is arranged above and next to the upper central feed pipe element 26 such that there is a continuous conduit for feed through the hood element 22 and the central feed pipe unit 44. Thus, there is a continuous feed conduit 37 through the spreader unit 14 as indicated in figures 7 and 8.
  • the upper central feed pipe element 26 is securely attached to the lower central feed pipe element 28 with bolts, screws or any other suitable fastening means.
  • the hood element 22 is securely attached to the upper central feed pipe element 26 with bolts, screws or any other suitable fastening means.
  • the spreader pipe 41 or preferably the outlet feed pipe 39 of the spreader pipe 41 , is securely attached to the hood element 22 in a watertight manner, preferably by welding which will provide a 100 percent watertight attachment of the spreader pipe 41 , and the counterweight pipe 43, to the hood element 22 of the spreader unit 14.
  • the result is that the entire feed conduit 37 is rotatable within the spreader unit 14 and the spreader pipe 41 will rotate together with the feed conduit 37 as will be further explained below.
  • the spreader unit 14 further comprises a spreader housing 15.
  • the spreader housing 15 comprises a lower housing element 16, an upper housing element 18 which is securely attached to the lower housing element 16, for example with bolts 19, screws or any other suitable fastening means.
  • the spreader housing 15 further comprises an inner housing element 20 which is securely attached to the upper housing element 18, for example with bolts 21 , screws or any other suitable fastening means.
  • the hood element 22 is provided with a hood skirt 23 which extends downwards radially on the outside of the upper housing element 18.
  • the hood element 22 is rotatable relative to the spreader housing 15, and therefore the upper housing element 18, but the clearance between the hood skirt 23 and the upper housing element 18 is made as small as possible to minimize any intrusion of water through the gap between the hood skirt 23 and the upper housing element 18.
  • the spreader unit 14 is securely attached to the floater unit 11 such that the feed pipe element 12 is in fluid communication with the feed conduit 37 of the spreader unit 14.
  • the feed pipe element 12 can be provided with a connecting flange element 53 with through holes
  • the feed spreader 10 can be provided with an attachment plate 52 with through holes where the through holes in the connecting flange element 53 and the attachment plate 52 align with bolt holes 17 in the lower housing element 16 of the spreader unit 14.
  • the feed pipe element 12 can therefore be securely attached to the spreader housing 15 such that it almost abuts the feed conduit 37.
  • the attachment plate is further provided with bolt holes 56 such that the attachment plate, and thus the spreader unit 14, can be securely attached to the floater unit 11 with bolts 55 as indicated in the figures.
  • the feed conduit 37 i.e. the central feed pipe unit 44 and the hood element 22, rotate together relative to the spreader housing 15.
  • the feed conduit 37 is supported by at least two bearing units 34, 35 which are mounted in the spreader housing 15.
  • the upper central feed pipe element 26 can be supported by an upper bearing unit 34 which is mounted to the inner housing element 20
  • the lower central feed pipe element 28 can be supported by a lower bearing unit 35 which is mounted to the lower housing element 16.
  • an upper seal device 25 between the inner housing element 20 and the hood element 20 above the upper bearing unit 34.
  • the upper seal device 25 is preferably a spring biased, radial oil seal which is robust and capable of sustaining a pressure of at least 10 bar.
  • a lower seal device 36 in the gap between the lower edge 47 of the lower central feed pipe element 28 and the lower housing element 16.
  • the lower seal device 26 is preferably a spring biased, radial oil seal which is robust and capable of sustaining a pressure of at least 10 bar.
  • the upper seal device 25 and the lower seal device 36 help to prevent intrusion of water and oil into the upper and lower bearings 34, 35 and further into the interior of the spreader unit 14 where the rotor 30 and the stator of the electric motor that drives and rotates the feed conduit 37 and the spreader pipe 41 , is located.
  • the electric motor is preferably a brushless electric motor as indicated on the figures.
  • the rotor 30 is securely attached to the feed conduit 37, for example the lower central feed pipe element 28 as shown in figures 7 and 8, circumferentially around the feed conduit 37, with bolts, screws or any other suitable fastening means.
  • the stator 32 is securely attached to the spreader housing 15, for example to the upper housing element 18 and/or the lower housing element 16 as shown in figures 7 and 8, circumferentially around the rotor 30, with bolts, screws or any other suitable fastening means.
  • the stator is electrically connected to a connecting device 50, such as a socket, for connection to an external supply of electric power to run the electric motor.
  • the rotor 32 of the electric motor When the feed spreader 10 is in operation, the rotor 32 of the electric motor is driven and since the rotor 32 is securely attached to the feed conduit 37, the feed conduit 37 and the spreader pipe 41 which is securely attached to the hood element 22 will also be rotated by the electric motor.
  • Most known feed spreaders are driven by the mass and speed of the feed that is pumped through the spreader pipe making it difficult to adjust the amount of feed to spread out and the area to be covered by the feed spreader. An electric motor makes such adjustments much easier.
  • the electric motor can advantageously be arranged to provide the spreader pipe 41 with a rotational movement in the direction that the outlet 42 of the spreader pipe 41 is at least partially facing. The feed will then be expulsed in the same direction as the spreader pipe is rotating which has been found to improve the spreading of the feed in the farming unit.

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)

Abstract

Une unité épandeur (14) et un épandeur d'aliments (10) pour épandre des aliments dans une unité d'élevage de poissons ou d'autres créatures marines sont divulgués. L'unité épandeur (14) comprend un boîtier d'épandeur (15) et un élément capot (22) disposé sur le boîtier d'épandeur (15) de manière rotative par rapport au boîtier d'épandeur (15) ; un conduit d'aliments (37) qui peut tourner par rapport au boîtier d'épandeur (15) ; et un moteur électrique comprenant un rotor (30) et un stator (32), le rotor étant disposé de manière circonférentielle autour du conduit d'aliments (37) et étant solidement fixé au conduit d'aliments (37), et le stator (32) étant disposé dans le boîtier d'épandeur (15) de manière circonférentielle autour du rotor (30). Un procédé de fonctionnement et une utilisation de l'unité épandeur (14) et de l'épandeur d'aliments (10) sont également divulgués.
PCT/NO2022/050198 2021-08-20 2022-08-19 Dispositif d'épandage et procédé de fonctionnement d'un dispositif d'épandage WO2023022604A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO20211008 2021-08-20
NO20211008 2021-08-20
NO20211282 2021-10-26
NO20211282A NO346986B1 (en) 2021-08-20 2021-10-26 A spreader device for spreading feed, a feed spreader comprising a spreader device, a method for operating a spreader device and/or a feed spreader, and use of a spreader device and/or a feed spreader for spreading of fish feed in a fish pen

Publications (1)

Publication Number Publication Date
WO2023022604A1 true WO2023022604A1 (fr) 2023-02-23

Family

ID=83457483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2022/050198 WO2023022604A1 (fr) 2021-08-20 2022-08-19 Dispositif d'épandage et procédé de fonctionnement d'un dispositif d'épandage

Country Status (1)

Country Link
WO (1) WO2023022604A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO325097B1 (no) 2005-03-18 2008-02-04 Jan Erik Kyrkjebo Anordning for fordeling av fôr i en merd eller fiskedam
US20130215414A1 (en) * 2010-11-13 2013-08-22 Wu Weiguo Split feed distributor with feed supplied from below and thrown circumferentially
CN102669035B (zh) * 2010-11-13 2014-05-07 浙江富地机械有限公司 下进料分体式投饲机及带有该投饲机的水产温室养殖池
WO2015000285A1 (fr) * 2013-07-02 2015-01-08 Wu Weiguo Procédé d'agriculture et grand appareil agricole rotatif
CN105454123B (zh) * 2014-09-30 2017-10-13 浙江富地机械有限公司 一种鱼池抛料盘及抛料盘的制造方法及投饲机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO325097B1 (no) 2005-03-18 2008-02-04 Jan Erik Kyrkjebo Anordning for fordeling av fôr i en merd eller fiskedam
US20130215414A1 (en) * 2010-11-13 2013-08-22 Wu Weiguo Split feed distributor with feed supplied from below and thrown circumferentially
CN102669035B (zh) * 2010-11-13 2014-05-07 浙江富地机械有限公司 下进料分体式投饲机及带有该投饲机的水产温室养殖池
WO2015000285A1 (fr) * 2013-07-02 2015-01-08 Wu Weiguo Procédé d'agriculture et grand appareil agricole rotatif
CN105454123B (zh) * 2014-09-30 2017-10-13 浙江富地机械有限公司 一种鱼池抛料盘及抛料盘的制造方法及投饲机

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