CN110754447B - Suspended screen plate for single-ship-bottom trawl - Google Patents
Suspended screen plate for single-ship-bottom trawl Download PDFInfo
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- CN110754447B CN110754447B CN201910832783.2A CN201910832783A CN110754447B CN 110754447 B CN110754447 B CN 110754447B CN 201910832783 A CN201910832783 A CN 201910832783A CN 110754447 B CN110754447 B CN 110754447B
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- 230000005484 gravity Effects 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 11
- 241001233242 Lontra Species 0.000 claims description 16
- 238000013459 approach Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 238000007790 scraping Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Abstract
The invention discloses a screen plate for a suspended single-ship bottom trawl, and aims to provide a screen plate for a suspended single-ship bottom trawl, which can effectively solve the problem that the lower edge of the screen plate is scraped to the seabed in the operation process of the trawl in the prior art, so that the seabed bottom is seriously damaged. The self-adaptive expansion device comprises a main screen plate and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main screen plate, the buoyancy of the main screen plate is greater than the gravity of the main screen plate, and the buoyancy of the main screen plate is less than the sum of the gravity of the main screen plate and the gravity of the self-adaptive expansion device; the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements in one-to-one correspondence with the support wing plates, connecting rods in one-to-one correspondence with the support wing plates, a hinge seat positioned below the main network plate and a counterweight ball hung below the hinge seat through a connecting rope, the upper portions of the support wing plates are hinged and connected with the main network plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower portions of the corresponding support wing plates, and the lower ends of the connecting rods are hinged and connected with the hinge seat.
Description
Technical Field
The invention relates to a trawl door, in particular to a suspended single-ship bottom trawl door.
Background
The trawl at the bottom of a single ship is also called single towing, and adopts a ship for towing, the floater and the sinker on the trawl provide vertical expansion for the trawl, and the two net plates provide horizontal expansion for the trawl. The trawl board of single ship bottom has many types, such as rectangle, ellipse, vertical curved surface type, complex wing type otter board, etc., but the otter board of trawl is generally heavier at present, in the course of trawl operation, often appear the lower edge of otter board scrape the seabed, produce more serious destruction to the bottom matter of seabed.
Disclosure of Invention
The invention aims to provide a screen plate for a suspended single-ship-bottom trawl, which can effectively solve the problem that the lower edge of the screen plate scrapes the seabed in the operation process of the trawl in the prior art and seriously damages seabed sediments.
The technical scheme of the invention is as follows:
a mesh plate for a suspended single-ship bottom trawl comprises a main mesh plate and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main mesh plate, the buoyancy of the main mesh plate is greater than the gravity of the main mesh plate, and the buoyancy of the main mesh plate is smaller than the sum of the gravity of the main mesh plate and the gravity of the self-adaptive expansion device; the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements, connecting rods, a hinge seat and a counterweight ball, wherein the elastic connecting elements are in one-to-one correspondence with the support wing plates, the connecting rods are in one-to-one correspondence with the support wing plates, the hinge seat is positioned below the main web plate, the counterweight ball is hung below the hinge seat through a connecting rope, the main web plate is positioned between the two support wing plates, the upper parts of the support wing plates are hinged and connected with the main web plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower parts of the corresponding support wing plates, the lower ends of the connecting rods are hinged and connected with the hinge seat, the upper ends of the elastic connecting elements are connected with the main web plate, the lower ends of the elastic connecting elements are connected with the corresponding support wing plates, and the upper ends of the elastic connecting elements are positioned above the corresponding support wing plates; in the process that the main net plate gradually approaches to the seabed, after the counterweight ball contacts the seabed, the elastic connecting element drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate.
Therefore, in the trawl operation process, when the main net plate is gradually close to the seabed, the counterweight ball firstly touches the bottom, then, because the gravity of the counterweight ball is supported on the seabed, at the moment, the tension of the elastic connecting element acting on the support wing plate overcomes the gravity of the support wing plate, drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate, thereby reducing or even eliminating the impact of the main net plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main net plate to the seabed; meanwhile, as the counterweight ball is spherical, the counterweight ball drags or rolls along the seabed, and can not seriously damage seabed bottom materials; therefore, the mesh plate for the suspended single-ship-bottom trawl can effectively solve the problem that the lower edge of the mesh plate scrapes the seabed in the operation process of the trawl in the prior art to seriously damage the seabed substrate, and is favorable for protecting the seabed substrate. On the other hand, the buoyancy of the main net plate is larger than the gravity of the main net plate, and the buoyancy of the main net plate is smaller than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device, so that the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the lower edge of the net plate can be favorably reduced to scrape the seabed.
Preferably, the side surface of the main net plate is provided with a plurality of guide wing plates extending forwards and backwards.
Preferably, the two opposite side surfaces of the main net plate are provided with the flow guide wing plates.
Preferably, the guide wing plates are distributed at the upper part, the middle part and the lower part of the main net plate.
Preferably, the left and right support wing plates are symmetrically distributed on two opposite sides of the main net plate.
Preferably, the elastic connection element is a tension spring or a rubber band.
Preferably, the buoyancy of the main net plate is greater than the sum of the gravity of the main net plate, the support wing plates, the connecting rods and the elastic connecting elements. So, main otter board will be through counter weight ball and connection rope suspension in aqueous, is favorable to further reducing the lower edge of otter board and scrapes the seabed.
Preferably, the side surface of the support wing plate is provided with a connecting ring, and the lower end of the elastic connecting element is connected with the connecting ring on the corresponding support wing plate.
The invention has the beneficial effects that: therefore, in the trawl operation process, when the main net plate is gradually close to the seabed, the counterweight ball firstly touches the bottom, then, because the gravity of the counterweight ball is supported on the seabed, at the moment, the tension of the elastic connecting element acting on the support wing plate overcomes the gravity of the support wing plate, drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate, thereby reducing or even eliminating the impact of the main net plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main net plate to the seabed; meanwhile, as the counterweight ball is spherical, the counterweight ball drags or rolls along the seabed, and can not seriously damage seabed bottom materials; therefore, the mesh plate for the suspended single-ship-bottom trawl can effectively solve the problem that the lower edge of the mesh plate scrapes the seabed in the operation process of the trawl in the prior art to seriously damage the seabed substrate, and is favorable for protecting the seabed substrate. On the other hand, the buoyancy of the main net plate is larger than the gravity of the main net plate, and the buoyancy of the main net plate is smaller than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device, so that the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the lower edge of the net plate can be favorably reduced to scrape the seabed.
Drawings
Fig. 1 is a schematic view showing a structure of a net plate for a suspended single-hull trawl according to the present invention.
Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.
In the figure:
the water-saving device comprises a main screen plate 1, a flow guide wing plate 1.1 and a hollow inner cavity 1.2;
self-adaptation extension fixture 2, support pterygoid lamina 2.0, connecting rod 2.1, articulated seat 2.2, connect rope 2.3, counter weight ball 2.4, elastic connection element 2.5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, a net plate for a suspended single-ship bottom trawl comprises a main net plate 1 and an adaptive expansion device 2. The main net plate is internally provided with a hollow inner cavity 1.2, the buoyancy of the main net plate is greater than the gravity of the main net plate, and the buoyancy of the main net plate is less than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device; therefore, the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the scraping of the lower edge of the net plate to the seabed is favorably reduced.
The self-adaptive expansion device 2 comprises a left supporting wing plate 2.0, a right supporting wing plate 2.0, elastic connecting elements 2.5 corresponding to the supporting wing plates one by one, connecting rods 2.1 corresponding to the supporting wing plates one by one, a hinge seat 2.2 positioned below the main grid plate and a counterweight ball 2.4 hung below the hinge seat through a connecting rope 2.3. The main net plate is positioned between the two supporting wing plates. The upper part of the supporting wing plate is hinged with the main grid plate through a hinge shaft. The upper end of the connecting rod is hinged with the lower part of the corresponding supporting wing plate, and the lower end of the connecting rod is hinged with the hinged seat. The upper end of each elastic connecting element is connected with the main web plate, the lower end of each elastic connecting element is connected with the corresponding supporting wing plate, and the upper end of each elastic connecting element is positioned above the corresponding supporting wing plate.
At the in-process that the major network board is toward being close to the seabed gradually, after counterweight ball contacts the seabed, elastic connection element will drive and correspond the rotatory expansion of support pterygoid lamina up for the downward impact of buffering major network board.
By applying the trawl with the net plate for the suspended trawl at the single ship bottom of the embodiment, in the trawl operation process, when the main net plate gradually approaches to the seabed, the counterweight ball firstly touches the bottom, then, because the gravity of the counterweight ball is supported at the seabed, at the moment, the tension of the elastic connecting element acting on the supporting wing plate overcomes the gravity of the supporting wing plate, drives the corresponding supporting wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate, thereby reducing or even eliminating the impact of the main net plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main net plate to the seabed; meanwhile, as the counterweight ball is spherical, the counterweight ball drags or rolls along the seabed, and can not seriously damage seabed bottom materials; therefore, the mesh plate for the suspended single-ship-bottom trawl can effectively solve the problem that the lower edge of the mesh plate scrapes the seabed in the operation process of the trawl in the prior art to seriously damage the seabed substrate, and is favorable for protecting the seabed substrate. On the other hand, the buoyancy of the main net plate is larger than the gravity of the main net plate, and the buoyancy of the main net plate is smaller than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device, so that the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the lower edge of the net plate can be favorably reduced to scrape the seabed.
Specifically, the tail part of the main net plate is provided with a net tying rope hole, the middle part or the front part of the main net plate is provided with a ship tying rope hole, a ship tying rope of the ship tying rope hole of the main net plate is connected with a fishing ship, and a net tying rope hole is connected with a fishing net. In this embodiment, the articulated shaft that the upper portion of supporting the pterygoid lamina and major network board articulated link to each other extends along the fore-and-aft direction of major network board and distributes.
Furthermore, the buoyancy of the main net plate is larger than the sum of the gravity of the main net plate, each supporting wing plate, each connecting rod and each elastic connecting element. So, main otter board will be through counter weight ball and connection rope suspension in aqueous, is favorable to further reducing the lower edge of otter board and scrapes the seabed.
Further, as shown in fig. 1 and 2, a plurality of guide wing plates 1.1 extending back and forth are arranged on the side surface of the main net plate. The two opposite side surfaces of the main screen plate are both provided with flow guide wing plates, and the flow guide wing plates on the two opposite side surfaces of the main screen plate are symmetrically distributed. The guide wing plates are distributed at the upper part, the middle part and the lower part of the main screen plate. In this embodiment, the upper end of the elastic connection element is connected with the flow guide wing plate located in the middle of the main net plate.
Further, as shown in fig. 1 and 2, the left and right support wing plates are symmetrically distributed on two opposite sides of the main net plate.
Furthermore, the elastic connecting element is a tension spring or a rubber rib.
Furthermore, the side surface of the support wing plate is provided with a connecting ring, and in the embodiment, the connecting ring is close to the lower part of the support wing plate. The lower end of the elastic connecting element is connected with the connecting ring on the corresponding support wing plate.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. A suspended otter board for a single-ship bottom trawl is characterized by comprising a main otter board and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main otter board, the buoyancy of the main otter board is greater than the gravity of the main otter board, and the buoyancy of the main otter board is less than the sum of the gravity of the main otter board and the gravity of the self-adaptive expansion device;
the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements, connecting rods, a hinge seat and a counterweight ball, wherein the elastic connecting elements are in one-to-one correspondence with the support wing plates, the connecting rods are in one-to-one correspondence with the support wing plates, the hinge seat is positioned below the main web plate, the counterweight ball is hung below the hinge seat through a connecting rope, the main web plate is positioned between the two support wing plates, the upper parts of the support wing plates are hinged and connected with the main web plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower parts of the corresponding support wing plates, the lower ends of the connecting rods are hinged and connected with the hinge seat, the upper ends of the elastic connecting elements are connected with the main web plate, the lower ends of the elastic connecting elements are connected with the corresponding support wing plates, and the upper ends of the elastic connecting elements are positioned above the corresponding support wing plates;
in the process that the main net plate gradually approaches to the seabed, after the counterweight ball contacts the seabed, the elastic connecting element drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate.
2. The net plate for the suspended trawl at the bottom of the single ship as claimed in claim 1, wherein a plurality of guide wing plates extending forward and backward are provided on a side surface of the main net plate.
3. The otter board for a suspended single-ship bottom trawl according to claim 2, wherein the guide wing plates are provided on both opposite side surfaces of the main otter board.
4. A net plate for a suspended single-bottom trawl according to claim 2 or 3, wherein the guide wing plates are distributed at the upper, middle and lower portions of the main net plate.
5. A net plate for a suspended trawl at the bottom of a single ship according to claim 1, 2 or 3, wherein said left and right support wing plates are symmetrically arranged at opposite sides of the main net plate.
6. A net plate for a suspended single-bottom trawl according to claim 1, 2 or 3, wherein said elastic connecting member is a tension spring or a rubber rib.
7. A net plate for a suspended trawl at the bottom of a single ship according to claim 1, 2 or 3, wherein the buoyancy of said main net plate is greater than the sum of the gravity of said main net plate, said supporting wing plates, said connecting rods and said elastic connecting members.
8. The net plate for the suspended single-ship bottom trawl according to claim 1, 2 or 3, wherein the side surface of the support wing plate is provided with a connecting ring, and the lower end of the elastic connecting element is connected with the connecting ring on the corresponding support wing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832783.2A CN110754447B (en) | 2019-09-04 | 2019-09-04 | Suspended screen plate for single-ship-bottom trawl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832783.2A CN110754447B (en) | 2019-09-04 | 2019-09-04 | Suspended screen plate for single-ship-bottom trawl |
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| Publication Number | Publication Date |
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| CN110754447A CN110754447A (en) | 2020-02-07 |
| CN110754447B true CN110754447B (en) | 2021-10-08 |
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| CN201910832783.2A Active CN110754447B (en) | 2019-09-04 | 2019-09-04 | Suspended screen plate for single-ship-bottom trawl |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111869633B (en) * | 2020-05-25 | 2021-10-26 | 浙江海洋大学 | Rotary multi-net-bag trawl |
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| DE69719322D1 (en) * | 1996-04-30 | 2003-04-03 | Helgi Larsen | SCHER BOARD |
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| CN204090769U (en) * | 2014-09-16 | 2015-01-14 | 浙江省海洋水产研究所 | A kind of marine organisms of artificial input are lived device |
| CN204292032U (en) * | 2014-12-03 | 2015-04-29 | 上海海洋大学 | A kind of trawl door structure |
| CN104920312A (en) * | 2015-05-21 | 2015-09-23 | 山东大学（威海） | Upright grid type net plate |
| CN105445059A (en) * | 2015-11-16 | 2016-03-30 | 浙江省海洋水产研究所 | Anti-interference collection equipment for bottom seawater |
-
2019
- 2019-09-04 CN CN201910832783.2A patent/CN110754447B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69719322D1 (en) * | 1996-04-30 | 2003-04-03 | Helgi Larsen | SCHER BOARD |
| CN101464231A (en) * | 2008-12-31 | 2009-06-24 | 四川大学 | Deep water type water quality measurement multi-point sampling device |
| CN102879226A (en) * | 2012-09-14 | 2013-01-16 | 大连理工大学 | Piston type visible water sample collection instrument |
| CN204090769U (en) * | 2014-09-16 | 2015-01-14 | 浙江省海洋水产研究所 | A kind of marine organisms of artificial input are lived device |
| CN204292032U (en) * | 2014-12-03 | 2015-04-29 | 上海海洋大学 | A kind of trawl door structure |
| CN104920312A (en) * | 2015-05-21 | 2015-09-23 | 山东大学（威海） | Upright grid type net plate |
| CN105445059A (en) * | 2015-11-16 | 2016-03-30 | 浙江省海洋水产研究所 | Anti-interference collection equipment for bottom seawater |
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