WO2018108222A1 - Panneau de chalut à moyen de réglage - Google Patents

Panneau de chalut à moyen de réglage Download PDF

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Publication number
WO2018108222A1
WO2018108222A1 PCT/DK2017/050432 DK2017050432W WO2018108222A1 WO 2018108222 A1 WO2018108222 A1 WO 2018108222A1 DK 2017050432 W DK2017050432 W DK 2017050432W WO 2018108222 A1 WO2018108222 A1 WO 2018108222A1
Authority
WO
WIPO (PCT)
Prior art keywords
distal
flaps
panels
panel
proximal
Prior art date
Application number
PCT/DK2017/050432
Other languages
English (en)
Inventor
Gregers Baungaard
Jan Mueller
Original Assignee
Mld Aps
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 Mld Aps filed Critical Mld Aps
Priority to EP17881010.7A priority Critical patent/EP3554230A4/fr
Publication of WO2018108222A1 publication Critical patent/WO2018108222A1/fr

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
    • A01K73/00—Drawn nets
    • A01K73/02—Trawling nets
    • A01K73/04—Devices for spreading or positioning, e.g. control thereof
    • A01K73/045—Devices for spreading or positioning, e.g. control thereof for lateral sheering, e.g. trawl boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56—Towing or pushing equipment
    • B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • 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
    • A01K73/00—Drawn nets
    • A01K73/02—Trawling nets
    • A01K73/04—Devices for spreading or positioning, e.g. control thereof
    • A01K73/05—Devices for spreading or positioning, e.g. control thereof for vertical sheering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/14—Fishing vessels
    • B63B35/16—Trawlers

Definitions

  • the present disclosure relates generally to trawl doors used for trawl fishing, and more particularly, to trawl doors adapted for stable and efficient operation.
  • Modern trawl fisheries are complicated by an increase in operating costs due primarily to increasingly expensive fuel costs affecting both the catch of as well as the transportation to market of fish and value added fish product.
  • the increase in operating costs in combination with the tendency of regulatory authorities to impose fixed catch quotas in one form or another have combined to force trawl fishing vessel operators to increase the efficiency of their trawl systems.
  • One impact of this demand for increased efficiency of the trawl system is a demand for increased trawl door efficiency, and in particular an ever increasing need for trawl doors that are efficient at shallow depths and high speeds, as modern trawling increasingly requires economic operations at shallow depths and high speeds.
  • towed trawl door having a particular shape may operate stably throughout a range of angle of attack, when towed through water at a larger angle of attack trawl doors often exhibit instability and/or low efficiency. Moreover, how the towing vessel maneuvers can vary a trawl door's angle of attack.
  • Trawl doors operating at large angles of attack create enough drag induced directional forces on the trawl doors so as to impart sufficient stability to the trawl door system to thereby maintain the trawl doors in a workable orientation in the presence of a multitude of destabilizing forces routinely imparted to a trawl door during use.
  • Destabilizing forces result from, for example, side currents, imperfections in rigging, and loss of forward through-water speed affecting an inboard trawl door during turning of a trawling vessel. For example, when a towing vessel turns the inboard trawl door can become almost stationary relative to the water. A similar situation can arise when a trawl door experiences a strong side current.
  • trawl door instability Another condition which can cause trawl door instability is when some portion of the trawl contacts the sea floor. As is readily apparent, a trawl contacting the sea floor increases the force applied to the trawl door through the lower towing bridle in comparison with the force applied through the upper towing bridle. Stabilizing trawl doors when they operate under conditions such as those described above usually requires that the trawl doors operate at a larger angle of attack particularly at slower towing speeds.
  • US 2008271356 discloses a trawl door with an upper, a lower, and a middle frame defining an intermediate frame positioned between the upper and lower frames thereby establishing an upper section.
  • Panels of aerofoil construction are provided, which are placed over each other and connected to the frames in their respective ends. There are no movable and remotely controllable flaps mounted under any of the panels.
  • WO 2015055207 discloses a trawl door comprising an upper frame, a lower frame, and an intermediate frame.
  • the trawl door has several foils or panels. Moveable flaps are positioned at the trailing edge of one of the foils. Meanwhile, WO 2015055207 does not disclose flaps provided on both the upper and lower surface of the airfoils in order to ensure both vertical and horizontal adjustment of the trawl in the water.
  • the present invention solves the above mentioned problems, and provides a fast responding trawl door as far as its position in the water is concerned.
  • the trawl door is based upon curved airfoils to give maximum lift force and minimum drag.
  • flaps are provided on both the upper and lower surface of the airfoils. These flaps are remotely an preferably wireless controlled to give the opportunity to increase and reduce the lift force, and thereby increase or decrease the spreading ability of the doors as well by changing the heel angle of the doors, the opportunity to do vertical and horizontal adjustment is possible.
  • the inventors refer to the upper flaps as a lift dumper, which is intended to reduce the lift component of a wing or hydrofoil in a controlled way.
  • spoilers are plates on the top surface of a wing that can be extended upward into the airflow to spoil it. By so doing, the spoiler creates a controlled stall over the portion of the wing behind it, greatly reducing the lift of that wing section.
  • a trawl door (1) comprising:
  • a middle frame (4) defining an intermediate frame positioned between the upper (2) and lower (3) frames thereby establishing an upper and lower section;
  • a lower proximal panel (5) and lower distal panel (6) provided in the lower section and connected between the lower (3) and middle (4) frames as well as an upper proximal panel (7) and an upper distal panel (8) provided in the upper section and connected between the middle (4) and upper (2) frames, said panels (5, 6, 7, 8) being of aerofoil construction and connected to the frames in their respective ends;
  • upper flaps (9') mounted on the proximal or mesial panel (5, 7, 10, 1 1) and connected to driving units, the upper flaps (9') adapted to be controlled remotely, when the device is in use being towed through the water;
  • proximal (5, 7) and distal (6, 8) panels are placed over each other, and wherein the lower distal panel (6) and upper distal panel (8) have a distal surface (6', 8') rendering them hollow, wherein the flaps (9) constitute a part of the distal surface.
  • the flaps (9) are adapted to move relative to each other.
  • the flaps (9) mounted on the distal panels (6, 8) are integrated in the lower parts (6', 8') of the distal panels (6, 8) but may also placed on other positions, such as the end of the distal panels (6, 8).
  • the upper flaps (9') are integrated in the proximal panels (5, 7) or mesial panels (10, 1 1).
  • a lower mesial panel (10) is preferably imposed between the lower proximal (5) and distal (6) panels. Further, it is preferred that an upper mesial panel (11) is imposed between the upper proximal (7) and distal (8) panels.
  • chord of the mesial panel (10, 11) is not parallel with the chords of the proximal (5, 7) and distal panels (6, 8).
  • the spreading device may be provided with horizontal flaps (12) provided on the upper, middle, and/or lower frame in order to improve the control of the device in the vertical plane.
  • the horizontal flaps are adapted to be controlled remotely.
  • the lower distal panel (6) and upper distal panel (8) have a distal surface (6', 8'), preferably about 2-30 cm remote from the opposing aerofoil surface of the panel thereby rendering them hollow, wherein the flaps (9) constitute a part of the distal surface.
  • the distal surface (6', 8') of each distal panel (6, 8) is preferably concave whereas the opposing surface is convex.
  • fixation means are provided in the device for pulling after a vessel.
  • the improved trawl door is improved in comparison with a conventional trawl door.
  • the trawl door of the present invention improves stability when the trawl door is towed through water at a high angle of attack. Further, it produces less door drag.
  • Figure 1 shows in perspective a trawl door of the present invention.
  • Figure 2 shows lower cut of the trawl door.
  • a trawl door (1) of a preferred embodiment of the present invention has an upper frame (2) defining a top edge of the door; a lower frame (3) defining a bottom edge of the door; a middle frame (4) defining an intermediate frame positioned between the upper (2) and lower (3) frames thereby establishing an upper and lower section; a lower proximal panel (5) and lower distal panel (6) provided in the lower section and connected between the lower (3) and middle (4) frames as well as an upper proximal panel (7) and an upper distal panel (8) provided in the upper section and connected between the middle (4) and upper (2) frames, said panels (5, 6, 7, 8) being of aerofoil construction and connected to the frames in their respective ends; and flaps (9) mounted below the distal panels (6, 8) and connected to driving units, the flaps (9) adapted to be controlled remotely, when the device is in use being towed through the water; wherein the proximal (5, 7) and distal (6, 8) panels are superimposed and parallel.
  • FIG. 2 there is shown another view of the trawl door (1) in order to render visible the upper flaps (9') of the system.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Geology (AREA)
  • Ocean & Marine Engineering (AREA)
  • Oceanography (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Barrages (AREA)

Abstract

La présente invention concerne un dispositif de déploiement, tel qu'un panneau de chalut (1), comprenant des cadres (2, 3) définissant un bord supérieur et un bord inférieur du panneau (1) et un cadre intermédiaire (4) positionné entre les cadres (2, 3) ce qui permet d'établir une section supérieure et une section inférieure; des panneaux proximal et distal inférieurs (5, 6) sont disposés dans la section inférieure de même que des panneaux proximal et distal supérieurs (7, 8) sont disposés dans la section supérieure. Les panneaux (5, 6, 7, 8) ont une construction à profil aérodynamique. Des volets inférieurs (9) sont montés sous ou sur les panneaux distaux (6, 8) et des volets supérieurs (9') sont montés sur le panneau proximal ou mésial (5, 7, 10, 11). Les volets (9, 9') sont reliés à des unités d'entraînement et conçus pour être commandés à distance. Les panneaux distaux inférieur et supérieur (6, 8) ont une surface distale (6', 8') les rendant creux, les volets inférieurs (9) constituant une partie de la surface distale.
PCT/DK2017/050432 2016-12-13 2017-12-14 Panneau de chalut à moyen de réglage WO2018108222A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17881010.7A EP3554230A4 (fr) 2016-12-13 2017-12-14 Panneau de chalut à moyen de réglage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201670990 2016-12-13
DKPA201670990A DK179434B1 (en) 2016-12-13 2016-12-13 Trawl bucket with adjusting means

Publications (1)

Publication Number Publication Date
WO2018108222A1 true WO2018108222A1 (fr) 2018-06-21

Family

ID=62559301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2017/050432 WO2018108222A1 (fr) 2016-12-13 2017-12-14 Panneau de chalut à moyen de réglage

Country Status (3)

Country Link
EP (1) EP3554230A4 (fr)
DK (1) DK179434B1 (fr)
WO (1) WO2018108222A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020254896A1 (fr) * 2019-06-18 2020-12-24 Mld Aps Porte de chalut avec moyen de réglage de levage
WO2022207052A1 (fr) 2021-03-30 2022-10-06 Thyborøn Skibssmedie A/S Panneau de chalut avec sections d'hydroptère mobiles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190025A (en) * 1963-07-05 1965-06-22 Burney Charles Dennistoun Trawling otters
US20080022913A1 (en) * 2003-03-27 2008-01-31 Rune Toennessen System for Depth Control of a Marine Deflector
GB2492652A (en) * 2011-07-05 2013-01-09 Pgs Geophysical As Submersible deflector for geophysical surveying
WO2015055207A1 (fr) * 2013-10-14 2015-04-23 Thyborøn Skibssmedie A/S Porte de chalut
US20150272094A1 (en) * 2014-04-01 2015-10-01 Lawrence Ahlfert Pearlman "Smart" Semi-Autonomous Trawler Fishing Net

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO328745B1 (no) * 2008-08-11 2010-05-03 Egersund Tral As Traldor for fjernstyrt regulering under vann av traldorens aktive flateareal.
DK178860B1 (en) * 2015-11-18 2017-04-03 Mld Aps Trawl door with adjustment means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190025A (en) * 1963-07-05 1965-06-22 Burney Charles Dennistoun Trawling otters
US20080022913A1 (en) * 2003-03-27 2008-01-31 Rune Toennessen System for Depth Control of a Marine Deflector
GB2492652A (en) * 2011-07-05 2013-01-09 Pgs Geophysical As Submersible deflector for geophysical surveying
WO2015055207A1 (fr) * 2013-10-14 2015-04-23 Thyborøn Skibssmedie A/S Porte de chalut
US20150272094A1 (en) * 2014-04-01 2015-10-01 Lawrence Ahlfert Pearlman "Smart" Semi-Autonomous Trawler Fishing Net

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3554230A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020254896A1 (fr) * 2019-06-18 2020-12-24 Mld Aps Porte de chalut avec moyen de réglage de levage
CN113993376A (zh) * 2019-06-18 2022-01-28 Mld私人有限责任公司 带有升力调节装置的拖网网板
CN113993376B (zh) * 2019-06-18 2023-08-29 Mld私人有限责任公司 带有升力调节装置的拖网网板
WO2022207052A1 (fr) 2021-03-30 2022-10-06 Thyborøn Skibssmedie A/S Panneau de chalut avec sections d'hydroptère mobiles

Also Published As

Publication number Publication date
EP3554230A1 (fr) 2019-10-23
DK179434B1 (en) 2018-07-27
DK201670990A1 (en) 2018-07-27
EP3554230A4 (fr) 2020-07-15

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