CA1275612C - Method and an apparatus for cleaning the net bags of breeding enclosures - Google Patents
Method and an apparatus for cleaning the net bags of breeding enclosuresInfo
- Publication number
- CA1275612C CA1275612C CA000533874A CA533874A CA1275612C CA 1275612 C CA1275612 C CA 1275612C CA 000533874 A CA000533874 A CA 000533874A CA 533874 A CA533874 A CA 533874A CA 1275612 C CA1275612 C CA 1275612C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- water
- net bag
- interior
- cleaning
- 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.)
- Expired - Fee Related
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000009395 breeding Methods 0.000 title claims abstract description 6
- 230000001488 breeding effect Effects 0.000 title claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000012010 growth Effects 0.000 claims description 9
- 241000237536 Mytilus edulis Species 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 claims description 3
- 235000020638 mussel Nutrition 0.000 claims description 3
- 241000195493 Cryptophyta Species 0.000 claims description 2
- 230000035508 accumulation Effects 0.000 claims 2
- 238000009825 accumulation Methods 0.000 claims 2
- 238000005507 spraying Methods 0.000 claims 2
- 241001474374 Blennius Species 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 4
- 239000008237 rinsing water Substances 0.000 abstract 1
- 241001163743 Perlodes Species 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Abstract
A method and an apparatus for cleaning the net bag of breeding enclosures.
Abstract of the disclosure An apparatus for cleaning the net bag for breeding enclosures seines, and the like comprising a rotatable driven drum, known per se, with an insert opening for the net bag and radial inward projecting ridges, as well as feeding and outlet means for washing and rinsing water. Said inlet means for water are designed for continuous supply of water during the entire period of operation, and outlet means are con-tinuously open during the entire period of operation. Said inlet means for water consist of axially directed openings or nozzles which may be arranged in a cross-shaped pattern with their point of intersection in the center of said drum. Said outlet means consist of a number of axial open slots in the drum shell. The water pressure in and the area of said inlet openings are adapted to the area of outlets in such a manner that the drum is approximately free for water during oper-ation. The height of each ridge constitutes at least 10% of the drum diameter.
Abstract of the disclosure An apparatus for cleaning the net bag for breeding enclosures seines, and the like comprising a rotatable driven drum, known per se, with an insert opening for the net bag and radial inward projecting ridges, as well as feeding and outlet means for washing and rinsing water. Said inlet means for water are designed for continuous supply of water during the entire period of operation, and outlet means are con-tinuously open during the entire period of operation. Said inlet means for water consist of axially directed openings or nozzles which may be arranged in a cross-shaped pattern with their point of intersection in the center of said drum. Said outlet means consist of a number of axial open slots in the drum shell. The water pressure in and the area of said inlet openings are adapted to the area of outlets in such a manner that the drum is approximately free for water during oper-ation. The height of each ridge constitutes at least 10% of the drum diameter.
Description
~ 2~756'~
_ A method and an apparatus for cleaning the net bagæ of The present lnventlon relates to a method and a devlce for cleanln~ ~he net bags of ~reedlng enclosures, or the llke.
Most fish breed~ng plants for fi6h for consumptlon, today use breedlng enclo6ures wlth a net b~g lmmeraed ln the water in a fJord or a ~hielded area where there l~ sufflclent current to ens~re replacement of water. The net ba~s are steadlly l~mersed in water, and pelaglc blue mussel fry adhere to the mesh threads, and then clusters of mussel~ develop rapldly on the bag. E6peclally due to the large supply of nutrimen~s fed to the watcr when the flsh ln said enelosures 1B fed, there ~ill be ~trong growkh of algae, ~reen seQweed, ~nd the llke ln said net ba~. Thls will clog the net bag so that free supply of water throu~h the meshes is reduced, ~nd the result is ~hat 8~id ~et bags must often be taken ashore for cleaning. Today, thls ls c~rried out by liftlng the bag step by step by the aid o~ a crane and washing lt down by the ~id of hlgh pressure Jets, one area at a tlme. Th~s 18 a ~lme consuming as well as labour consumlng operatlon, usually taklng from 5 ~o 8 hours with ~everal persons participating ln the task. Such clean~ng of the net bags i~or breedlng enclo~ures alone constltutes between 40 ~nd 50% of the work at ~ fish breeding plant. Obviously, this i6 of ~reat lmportance ~o the economy ~f ~ plant. Untll no~ the fin~ncial situatlon ln this lndustry was good enough not to make improvement of efficiency a must, but ln the fu~ure more keen competition ls to be expected from other countr~es, and lt will then be necsssary to reduce the need for ~anpower, especially in a high cost country like Norway.
First an~ foremo~t, it ls ~n obJect of the inventlon to provide a method for less e~pensive ~nd more rapld cleanlng 3~ of the net bag of ~reedlng enclosures.
,......
XER3X TELECOPIER 495: Z- 4-87: 7:21~ ; 47 2 4ZZ354~ 41~86Z1637;~ 3 FROM 47 2 422354 '87.~4.02 13~22 756~
No app~ratus for cleaning ~et ba~ for breedlng enclo~ure~
were previously propo~ed, and lt 1~ thus, another subJect of the lnven~ion to provlde suCh an ~pparatus which can auto-matlcally clean a net bag ln the cour~e of a i`ractlon of the r. tlme it takes with the method previously used.
According to the inventlon this is achiev~d by a me~hod that ls characterl~ed by the fact t;~at the net bag, released from buoyancy bodles and moorln~, ls lntroduoed into a rotatable ;) driven drum provlded with a~ially extendlng ridges facing lnward, that sa1 d net bag 18 washed by the ald of pressurlzed water continuously sprayed through nozzles in the internal drum wall, and that water ~nd washed off matter is during the entlre washing oper~tlon dralned of~ through openlng in said drum, The apparatus accordlng to the lnvention i~ characterlzed by the ~act that lt comprlses a rotatable driven drum, known per se, and having an inlst opening ~or the net bag and radlally proJectlng rldges, QS well as ~upply and outlet mPans for washing water, sald water ~upply means being deslgned ~or continuous supply of water durin~ the entlre operatlng period, and that said outlet means are continuousl~r open during the entlre operating perlod, that sald water supply means consist oi~ axially directed openln~s or nozzles lnside sald drum provided ln a cross æhaped pattern with the point of inters~ction at the ce~ter of said drum.
The apparatus according to ~he ~nvention carrle~ out a 3(, combined washlng and rlnslng operation during the entire operation wlth removal of mussel~ and other growth from the net bag and out of said drum through ~aid contlnuously open o~tlet openings~ Surprlsing].y, very strong and rapld removal o~ growth from ~he net bag i~ ~chieved by contlnuous ~upply Or water w~lch ls sprayed or 6purted onto the net bag ln6i~e ~ld druln, and by contlnuouc removal of water from ~aid drum, prevel~tlng an~i volume of water to build up ln~ide the drum.
1 ~561 d Tile reason for ~uch rapld and efficient cle~ning 1E probably that the wet and heavy net bag 1 B very vlgorously worked lnside said drum by t~e aid o~ the in~ard proJecting rldges.
Sald ridge~ have a considerable helght or radlal proJectlon, in a preferred embodlment of the invention at least 10~ of the lnternal diameter of said ~rum and will, t~u6, be ~ble to llft the net bag to a high level ln~lde the drum, and they will hat~e a strong impact on the net bag when lt falls do~n ln the drum. There being very llttle w~ter ln said drum the 1~ effect of the lmpact of sald rldge~ on the net wlll not be ~ubdued. Such lmpact on the wet net b~g ~111 cause muæsel~
and other growth to be knocked off the me~h thread~, and the released material will be continuou~ly wa~hed through the outlet openings to be removed from the drum. Tests ~howed 1~ that a net bag with a diameter of approximately 40 m and a depth of approximatel~ ~ m, i.e. a net bag of approximately 100 m2, is cleaned in the appar~tus ~ccording to the lnvention 12~ le~s than half an hour.
The invention i~ disclosed in more deta~l below with refer-ence to the drawings showin~ an embodlment of the apparatu~
according to the lnventlon.
Figure 1 shows the drum-sh~ped appar~tus ~o~ cleanlng net bags for breedlng enclosures ln a side elevation.
Figure 2 shows an end view of sald apparatus.
Flgure 3 is ~ section~l view along llne A-A ln Flgure 2, ~nd ~igure 4 i~ a sectional view along llne B-B in Figure 1~
The apparatus acc~rding to the invention ec6entially comp-rices a thin shee~ drum 1 which i~ provided to be rot~ed on 3~ a ~upport 2 Qnd ha~ ~n ln~ert opening 3. In~ide ~aid drum four ~turd~T rldges 4 are provided evenly ~p~c~d on the drum perlphery, ~;~id rldgeg hQve ~ height or radlal proJectlon ~ ~1 XER~X TELECOPIER 495; 2- 4-8~: 7:23QM ; 47 2 472354~ 416~621637;# 5 FR0~ 47 2 422354 '87.04.~2 13:24 ~ S~
_ that 1s at least 10~ of the internal diameter of ~ald drum.
In the shown embodlment the drum diameter ls ~pproxim~tely 2,4 m and the length ls ~pproxlmately 1,2 m. The height of sald rldges ls 40 cm.
Four water cbannels 6, 7, 8, and 9 are provlded in~ide said drum in one o~ the end walls of the drum. Sald channels extend radlally from the centre of the drum, thus, fortnlng a cross-shaped pattern. Water i3 supplled to æald channels from a plpe 10 through the hollow drum ~ha~t 11 via a swivel 12. Channels ~, 7, 8, and 9 have a n~ber of openings or nozzles 13 for water. In the shell 14 of the drum a num~er of outlet slots 15 for water are provided. Drum 1 is rotated by t~le aid of a diagrammatlcally indlcated motor 16. In Flgure 3 the apparatus is shown in operation to clean a net bag 16 which is lifted in the direction of arrow 17 by ridges 4, all the w~y to the top of ~rum 1, before it falls down again onto the bottom of the drum. This operation ls carried out contlnuously, w~ter being conti~uou61y supplied. Mussleæ
and other growths wlll be continuously carried awa~ with effluent, especiall~ through outlet ~lot 15', when sald slot ls faclng downwar~s t as shown in Flgure ~.
_ A method and an apparatus for cleaning the net bagæ of The present lnventlon relates to a method and a devlce for cleanln~ ~he net bags of ~reedlng enclosures, or the llke.
Most fish breed~ng plants for fi6h for consumptlon, today use breedlng enclo6ures wlth a net b~g lmmeraed ln the water in a fJord or a ~hielded area where there l~ sufflclent current to ens~re replacement of water. The net ba~s are steadlly l~mersed in water, and pelaglc blue mussel fry adhere to the mesh threads, and then clusters of mussel~ develop rapldly on the bag. E6peclally due to the large supply of nutrimen~s fed to the watcr when the flsh ln said enelosures 1B fed, there ~ill be ~trong growkh of algae, ~reen seQweed, ~nd the llke ln said net ba~. Thls will clog the net bag so that free supply of water throu~h the meshes is reduced, ~nd the result is ~hat 8~id ~et bags must often be taken ashore for cleaning. Today, thls ls c~rried out by liftlng the bag step by step by the aid o~ a crane and washing lt down by the ~id of hlgh pressure Jets, one area at a tlme. Th~s 18 a ~lme consuming as well as labour consumlng operatlon, usually taklng from 5 ~o 8 hours with ~everal persons participating ln the task. Such clean~ng of the net bags i~or breedlng enclo~ures alone constltutes between 40 ~nd 50% of the work at ~ fish breeding plant. Obviously, this i6 of ~reat lmportance ~o the economy ~f ~ plant. Untll no~ the fin~ncial situatlon ln this lndustry was good enough not to make improvement of efficiency a must, but ln the fu~ure more keen competition ls to be expected from other countr~es, and lt will then be necsssary to reduce the need for ~anpower, especially in a high cost country like Norway.
First an~ foremo~t, it ls ~n obJect of the inventlon to provide a method for less e~pensive ~nd more rapld cleanlng 3~ of the net bag of ~reedlng enclosures.
,......
XER3X TELECOPIER 495: Z- 4-87: 7:21~ ; 47 2 4ZZ354~ 41~86Z1637;~ 3 FROM 47 2 422354 '87.~4.02 13~22 756~
No app~ratus for cleaning ~et ba~ for breedlng enclo~ure~
were previously propo~ed, and lt 1~ thus, another subJect of the lnven~ion to provlde suCh an ~pparatus which can auto-matlcally clean a net bag ln the cour~e of a i`ractlon of the r. tlme it takes with the method previously used.
According to the inventlon this is achiev~d by a me~hod that ls characterl~ed by the fact t;~at the net bag, released from buoyancy bodles and moorln~, ls lntroduoed into a rotatable ;) driven drum provlded with a~ially extendlng ridges facing lnward, that sa1 d net bag 18 washed by the ald of pressurlzed water continuously sprayed through nozzles in the internal drum wall, and that water ~nd washed off matter is during the entlre washing oper~tlon dralned of~ through openlng in said drum, The apparatus accordlng to the lnvention i~ characterlzed by the ~act that lt comprlses a rotatable driven drum, known per se, and having an inlst opening ~or the net bag and radlally proJectlng rldges, QS well as ~upply and outlet mPans for washing water, sald water ~upply means being deslgned ~or continuous supply of water durin~ the entlre operatlng period, and that said outlet means are continuousl~r open during the entlre operating perlod, that sald water supply means consist oi~ axially directed openln~s or nozzles lnside sald drum provided ln a cross æhaped pattern with the point of inters~ction at the ce~ter of said drum.
The apparatus according to ~he ~nvention carrle~ out a 3(, combined washlng and rlnslng operation during the entire operation wlth removal of mussel~ and other growth from the net bag and out of said drum through ~aid contlnuously open o~tlet openings~ Surprlsing].y, very strong and rapld removal o~ growth from ~he net bag i~ ~chieved by contlnuous ~upply Or water w~lch ls sprayed or 6purted onto the net bag ln6i~e ~ld druln, and by contlnuouc removal of water from ~aid drum, prevel~tlng an~i volume of water to build up ln~ide the drum.
1 ~561 d Tile reason for ~uch rapld and efficient cle~ning 1E probably that the wet and heavy net bag 1 B very vlgorously worked lnside said drum by t~e aid o~ the in~ard proJecting rldges.
Sald ridge~ have a considerable helght or radlal proJectlon, in a preferred embodlment of the invention at least 10~ of the lnternal diameter of said ~rum and will, t~u6, be ~ble to llft the net bag to a high level ln~lde the drum, and they will hat~e a strong impact on the net bag when lt falls do~n ln the drum. There being very llttle w~ter ln said drum the 1~ effect of the lmpact of sald rldge~ on the net wlll not be ~ubdued. Such lmpact on the wet net b~g ~111 cause muæsel~
and other growth to be knocked off the me~h thread~, and the released material will be continuou~ly wa~hed through the outlet openings to be removed from the drum. Tests ~howed 1~ that a net bag with a diameter of approximately 40 m and a depth of approximatel~ ~ m, i.e. a net bag of approximately 100 m2, is cleaned in the appar~tus ~ccording to the lnvention 12~ le~s than half an hour.
The invention i~ disclosed in more deta~l below with refer-ence to the drawings showin~ an embodlment of the apparatu~
according to the lnventlon.
Figure 1 shows the drum-sh~ped appar~tus ~o~ cleanlng net bags for breedlng enclosures ln a side elevation.
Figure 2 shows an end view of sald apparatus.
Flgure 3 is ~ section~l view along llne A-A ln Flgure 2, ~nd ~igure 4 i~ a sectional view along llne B-B in Figure 1~
The apparatus acc~rding to the invention ec6entially comp-rices a thin shee~ drum 1 which i~ provided to be rot~ed on 3~ a ~upport 2 Qnd ha~ ~n ln~ert opening 3. In~ide ~aid drum four ~turd~T rldges 4 are provided evenly ~p~c~d on the drum perlphery, ~;~id rldgeg hQve ~ height or radlal proJectlon ~ ~1 XER~X TELECOPIER 495; 2- 4-8~: 7:23QM ; 47 2 472354~ 416~621637;# 5 FR0~ 47 2 422354 '87.04.~2 13:24 ~ S~
_ that 1s at least 10~ of the internal diameter of ~ald drum.
In the shown embodlment the drum diameter ls ~pproxim~tely 2,4 m and the length ls ~pproxlmately 1,2 m. The height of sald rldges ls 40 cm.
Four water cbannels 6, 7, 8, and 9 are provlded in~ide said drum in one o~ the end walls of the drum. Sald channels extend radlally from the centre of the drum, thus, fortnlng a cross-shaped pattern. Water i3 supplled to æald channels from a plpe 10 through the hollow drum ~ha~t 11 via a swivel 12. Channels ~, 7, 8, and 9 have a n~ber of openings or nozzles 13 for water. In the shell 14 of the drum a num~er of outlet slots 15 for water are provided. Drum 1 is rotated by t~le aid of a diagrammatlcally indlcated motor 16. In Flgure 3 the apparatus is shown in operation to clean a net bag 16 which is lifted in the direction of arrow 17 by ridges 4, all the w~y to the top of ~rum 1, before it falls down again onto the bottom of the drum. This operation ls carried out contlnuously, w~ter being conti~uou61y supplied. Mussleæ
and other growths wlll be continuously carried awa~ with effluent, especiall~ through outlet ~lot 15', when sald slot ls faclng downwar~s t as shown in Flgure ~.
Claims (2)
1. The method of cleaning accumulations of algae, seaweed, mussels and other growth from the mesh threads of a large, wet and heavy net bag that has been used as a breeding enclosure moored in an immersed state in a body of water forming a portion of a fish breeding plant, comprising the steps of releasing the net bag from the net bag mooring, removing the net bag with the accumulated growth thereon from said body of water and placing the entire bag within a rotatable drum, the drum being mounted for rotation about a horizontal axis and having a plurality of spaced outlet openings therein for the egress of said accumulations from the interior of said drum, and the interior of the drum also being provided with a plurality of spaced ridges that extend substantially radially toward the center of said drum with each such ridge having a radial length that is at least 10% of the internal diameter of the drum, continually rotating said drum in a single direction to cause said ridges to regularly lift said net bag from the bottom to the top of the drum whereafter said net bag drops under the influence of gravity back to the bottom of the drum, continually spraying wash water under pressure, through water inlet openings in the drum, into the interior of said drum as the drum is rotated and as said net bag is lifted and dropped therein to cause portions of said accumulated growth to be knocked off of the mesh threads of the net bag by the combined action of the wash water spray and the impact of said net bag against the spaced ridges and interior walls of the drum, said wash water being sprayed under pressure into the interior of said drum from a side wall of the drum in a plurality of spaced water jets each of which is directed generally parallel to the axis of rotation of the drum, continually draining the wash water and said portions of said accumulated growth for the interior of said drum via said openings during the continued spraying of said wash water and the continued rotation of said drum until said net bag is substantially free of all said accumulated growth, and so correlating the pressure of said sprayed water and the size of said water inlet openings to the area of said outlet openings that the interior of said drum remains substantially free of water build-up during the cleaning of said net bag.
2. The method of claim 1 wherein said plurality of water jets are arranged in a cross-shaped patterm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000533874A CA1275612C (en) | 1987-04-03 | 1987-04-03 | Method and an apparatus for cleaning the net bags of breeding enclosures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000533874A CA1275612C (en) | 1987-04-03 | 1987-04-03 | Method and an apparatus for cleaning the net bags of breeding enclosures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1275612C true CA1275612C (en) | 1990-10-30 |
Family
ID=4135365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000533874A Expired - Fee Related CA1275612C (en) | 1987-04-03 | 1987-04-03 | Method and an apparatus for cleaning the net bags of breeding enclosures |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1275612C (en) |
-
1987
- 1987-04-03 CA CA000533874A patent/CA1275612C/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |