CN111937818A - Large-attack-angle screen plate operation posture adjusting structure and method - Google Patents
Large-attack-angle screen plate operation posture adjusting structure and method Download PDFInfo
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- CN111937818A CN111937818A CN202010750183.4A CN202010750183A CN111937818A CN 111937818 A CN111937818 A CN 111937818A CN 202010750183 A CN202010750183 A CN 202010750183A CN 111937818 A CN111937818 A CN 111937818A
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- plate
- connecting chain
- attack
- line plate
- warp
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; 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
Abstract
The invention relates to a large-attack-angle screen plate operation posture adjusting structure and a method, wherein an upper cross-line plate hole is formed in the front end part of the outer side of an upper cross-line plate of a screen plate, an upper cross-line plate connecting chain is connected with the upper cross-line plate through the upper cross-line plate hole, a lower cross-line plate hole is formed in the front end part of the outer side of a lower cross-line plate of the screen plate, a lower cross-line plate connecting chain is connected with the lower cross-line plate through the lower cross-line plate hole, a drag-line plate hole is formed in the middle rear part of the outer side of the drag-line plate, the drag-line plate connecting chain is connected with the drag-line plate through the drag-line plate hole, and the operation attack angle, the forward-tilting posture and the inward-tilting posture of the screen plate are adjusted by adjusting. The invention can adjust the screen plate to obtain a larger operation attack angle, and can adjust the screen plate to have forward and backward inclination and inward and outward inclination, thereby being beneficial to improving the expansion force of the screen plate and the stability of the operation.
Description
Technical Field
The invention belongs to the technical field of trawl door operation adjustment, and particularly relates to a structure and a method for adjusting operation posture of a large-attack-angle door.
Background
The net plate is connected to two sides of the net mouth of the trawl, and the trawl attachment has self-expansion performance under the action of water flow and is used for expanding two sides of the net mouth. The expansion force of the net plates changes along with the change of the water flow attack angle, the selected operation attack angle of most net plates is 30-40 degrees, the connection method is that the trawls at the front part are connected with the trawls at the middle position, 2 forked lines at the rear end are connected with the upper forked line plate and the lower forked line plate of the net plates, the operation attack angle is adjusted by forming a plurality of holes on the forked line plates, and the upper forked line plate and the lower forked line plate are connected with different forked line holes, and the connection method is suitable for the connection of the net plates in small attack angle operation (30-35 degrees). For the net plates with higher critical attack angles (attack angles corresponding to the highest values of lift coefficients) of the net plates, in order to obtain higher expansion force, the operation attack angles of some net plates are even selected to exceed 40 degrees, and the operation attack angles of the net plates are difficult to adjust by only using a method of connecting upper cross line plates and lower cross line plates by 2 cross lines. The net plate has the postures of forward and backward inclination and inward and outward inclination during operation, particularly for the bottom trawl net plate, the net plate has certain backward inclination (elevation angle) and outward inclination (inclination at a certain angle towards the back of the net plate), the stability of the net plate can be improved, and the operation posture of the net plate is difficult to adjust only by connecting the upper cross line plate and the lower cross line plate by the 2 cross lines at the back.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a large attack angle screen plate operation posture adjusting structure and method, which can adjust the screen plate to obtain a large operation attack angle, and can adjust the screen plate to have forward and backward inclination and inward and outward inclination, and are beneficial to improving the expansion force of the screen plate and the operation stability.
The invention provides a large-attack-angle screen plate operation posture adjusting structure which comprises a screen plate, an upper cross line plate connecting chain and a lower cross line plate connecting chain, wherein the front end part of the outer side of an upper cross line plate of the screen plate is provided with an upper cross line plate hole, the upper cross line plate connecting chain is connected with the upper cross line plate through the upper cross line plate hole, the front end part of the outer side of a lower cross line plate of the screen plate is provided with a lower cross line plate hole, the lower cross line plate connecting chain is connected with the lower cross line plate through the lower cross line plate hole, the large-attack-angle screen plate operation posture adjusting structure also comprises a warp line plate connecting chain, the middle rear part of the outer side of the warp line plate is provided with a warp line plate hole, and the warp line plate connecting chain is connected with the warp line plate through the warp line.
And reinforcing plates are respectively arranged at the positions of the upper forked line plate holes, the lower forked line plate holes and the warp line plate holes.
The middle rear part of the inner side of the warp plate of the net plate is provided with a warp pulling plate, the warp pulling plate is provided with warp pulling holes which are uniformly arranged at intervals along the vertical direction, and the front warp is connected with the warp pulling plate through the warp pulling holes.
The technical scheme adopted by the invention for solving the technical problem is to provide a large-attack-angle screen plate operation posture adjusting method, the large-attack-angle screen plate operation posture adjusting structure is used for adjusting, an upper forked line plate connecting chain, a lower forked line plate connecting chain and a steel cable plate connecting chain on the screen plates on two sides are respectively connected with steel cable connecting points on two sides of a trawl, and the operation attack angle, the forward-backward inclination posture and the inward-outward inclination posture of the screen plates are adjusted by adjusting the effective dragging lengths of the upper forked line plate connecting chain, the lower forked line plate connecting chain and the steel cable plate connecting chain.
Advantageous effects
The connection points are determined by adjusting the effective dragging lengths of the upper cross rope plate connecting chain, the lower cross rope plate connecting chain and the dragging rope plate connecting chain on the back of the screen plate, different operation attack angles of the screen plate can be adjusted by different connection points, the operation attack angle of the screen plate can be adjusted to be more than 40 degrees, and the expansion force of the screen plate is improved. The positions of the connection points are changed by adjusting the effective towing lengths of the three connecting chains, and the forward and backward tilting postures and the inward and outward tilting postures of the net plate can be adjusted, so that the net plate has better stability when being used for bottom trawl operation.
Drawings
FIG. 1 is a schematic view of a screen according to an embodiment of the present invention.
FIG. 2 is a schematic view of a method for adjusting an attack angle of a screen operation.
FIG. 3 is a schematic diagram of a method for adjusting a backward tilting posture of a screen.
FIG. 4 is a schematic diagram of a method for adjusting the camber attitude of a screen.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
An operation posture adjusting structure of a large-attack-angle screen plate comprises a screen plate, an upper forked line plate connecting chain 8, a lower forked line plate connecting chain 9, a front dragging line 11 and a dragging line plate connecting chain 10. As shown in figure 1, the net plate adopts a rectangular curved net plate, and comprises an upper forked plate 1 at the top, a trawl plate 4 at the middle and a lower forked plate 5 at the bottom, and the structure of the net plate is a general structure, and the detailed description is omitted.
The upper cross line plate 1 is a net plate stress supporting plate and is used for connecting a rear cross line, an upper cross line plate hole 2 is arranged at the front end part of the outer side (namely the back side) of the upper cross line plate 1, the size of the hole is adjusted as required, and a layer of reinforcing plate can be welded around the hole for increasing the strength. The upper forked plate connecting chain 8 is connected with the upper forked plate 1 through the upper forked plate hole 2.
The lower cross line plate 5 is a stressed supporting plate for connecting a rear cross line, a lower cross line plate hole 6 is arranged at the front end part of the outer side (namely the back) of the lower cross line plate 5, the position of the lower cross line plate hole 6 corresponds to the position of the upper cross line plate hole 2, the size of the hole is adjusted as required, and a layer of reinforcing plate can be welded around the hole for increasing the strength. The lower forked steel plate connecting chain 9 is connected with the lower forked steel plate 5 through the lower forked steel plate hole 6.
The warp steel plate 4 is a net plate stress supporting plate, the middle rear part of the inner side of the warp steel plate 4 is provided with a warp steel pulling plate 3, and five warp steel pulling holes (a, b, c, d and e) which are uniformly arranged at intervals along the vertical direction are formed in the warp steel pulling plate 3. The front dragging line 11 is connected with the dragging line pulling plate 3 through the dragging line pulling holes, and the inner and outer inclination angles of the net plate can be adjusted by connecting different dragging line pulling holes. The central rear part of the outer side of the warp plate 4 is provided with a warp plate hole 7, the size of the hole is adjusted according to the requirement, and a layer of reinforcing plate can be welded around the hole for increasing the strength. The warp plate connecting chain 10 is connected with the warp plate 4 through the warp plate holes 7.
When the operation posture adjustment structure of the large-attack-angle screen plate is used for adjusting the operation posture of the screen plate, two symmetrical screen plates are needed during operation, and the adjustment methods of the two side screen plates are the same. The upper forked line plate connecting chains 8, the lower forked line plate connecting chains 9 and the trawl board connecting chains 10 on the net plates on the two sides are respectively connected with the trawl connecting points on the two sides of the trawl net, and the operation attack angle, the front-back inclination posture and the inside-outside inclination posture of the net plates are adjusted by adjusting the effective dragging lengths of the upper forked line plate connecting chains 8, the lower forked line plate connecting chains 9 and the trawl board connecting chains 10.
As shown in fig. 2, by adjusting the effective towing lengths of the three iron chains of the upper forked plate connecting chain 8, the lower forked plate connecting chain 9 and the towing plate connecting chain 10, different attack angle adjusting connection points (a1-a5) can be obtained, and the connection of the different connection points can adjust the net plate to work at a required operation attack angle.
As shown in figure 3, the effective dragging lengths of the three iron chains of the upper forked plate connecting chain 8, the lower forked plate connecting chain 9 and the dragging plate connecting chain 10 are adjusted to obtain different forward and backward inclining posture adjusting connecting points (B1-B5), and the forward and backward inclining postures of the net plate can be adjusted by connecting the different connecting points.
As shown in fig. 4, the effective towing lengths of the three iron chains, i.e., the upper forked plate connecting chain 8, the lower forked plate connecting chain 9 and the towing plate connecting chain 10, are adjusted to obtain different inward and outward tilting posture adjustment connecting points (C1-C5), and the connection of the different connecting points can adjust the inward and outward tilting postures of the net plate as required.
Claims (4)
1. The utility model provides a big attack angle otter board operation gesture adjustment structure, includes otter board, goes up fork class board connecting chain (8) and lower fork class board connecting chain (9), the preceding tip in the last fork class board (1) outside of otter board is equipped with fork class plate hole (2), go up fork class board connecting chain (8) and be connected with last fork class board (1) through last fork class plate hole (2), the preceding tip in the lower fork class board (5) outside of otter board is equipped with fork class plate hole (6) down, fork class board connecting chain (9) are connected with lower fork class board (5) through fork class plate hole (6) down, its characterized in that: the steel wire rope dragging plate connecting chain is characterized by further comprising a steel wire rope dragging plate connecting chain (10), wherein steel wire rope dragging plate holes (7) are formed in the middle rear portion of the outer side of the steel wire rope dragging plate (4), and the steel wire rope dragging plate connecting chain (10) is connected with the steel wire rope dragging plate (4) through the steel wire rope dragging plate holes (7).
2. The large-attack-angle screen plate operation posture adjusting structure as claimed in claim 1, wherein: and reinforcing plates are respectively arranged at the positions of the upper forked steel plate holes (2), the lower forked steel plate holes (6) and the horseshoe steel plate holes (7).
3. The large-attack-angle screen plate operation posture adjusting structure as claimed in claim 1, wherein: the net plate is characterized in that a warp pulling plate (3) is arranged at the middle rear part of the inner side of the warp plate (4), warp pulling holes which are uniformly arranged at intervals along the vertical direction are formed in the warp pulling plate (3), and the front warp (11) is connected with the warp pulling plate (3) through the warp pulling holes.
4. A method for adjusting the operation posture of a large-attack-angle screen plate is characterized in that the operation posture adjusting structure of the large-attack-angle screen plate is used for adjusting, an upper forked plate connecting chain (8), a lower forked plate connecting chain (9) and a trawl plate connecting chain (10) on the screen plates on two sides are respectively connected with trawl connecting points on two sides of a trawl, and the operation attack angle, the forward and backward inclination posture and the inward and outward inclination posture of the screen plate are adjusted by adjusting the effective dragging lengths of the upper forked plate connecting chain (8), the lower forked plate connecting chain (9) and the trawl plate connecting chain (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750183.4A CN111937818A (en) | 2020-07-30 | 2020-07-30 | Large-attack-angle screen plate operation posture adjusting structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750183.4A CN111937818A (en) | 2020-07-30 | 2020-07-30 | Large-attack-angle screen plate operation posture adjusting structure and method |
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| Publication Number | Publication Date |
|---|---|
| CN111937818A true CN111937818A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010750183.4A Pending CN111937818A (en) | 2020-07-30 | 2020-07-30 | Large-attack-angle screen plate operation posture adjusting structure and method |
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| CN (1) | CN111937818A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB121492A (en) * | 1917-09-12 | 1918-12-24 | Herbert Heron | A New or Improved Trawling Board. |
| RU2292713C2 (en) * | 2004-11-26 | 2007-02-10 | Сергей Григорьевич Вантеев | Otter board (versions) |
| US20080022913A1 (en) * | 2003-03-27 | 2008-01-31 | Rune Toennessen | System for Depth Control of a Marine Deflector |
| WO2011029958A1 (en) * | 2009-09-14 | 2011-03-17 | Hampidjan Hf | High efficiency, high stability, multi-elevation trawl door and methods |
| CN105766819A (en) * | 2016-03-09 | 2016-07-20 | 中国水产科学研究院东海水产研究所 | Method for adjusting work attack angle of euphausia superba dragnet horizontal expanding device |
| CN106386717A (en) * | 2016-11-23 | 2017-02-15 | 中国水产科学研究院东海水产研究所 | Rectangular curved otter board |
| CN209185453U (en) * | 2018-11-28 | 2019-08-02 | 湖南鑫海股份有限公司 | A kind of middle layer trawl lock bindiny mechanism |
-
2020
- 2020-07-30 CN CN202010750183.4A patent/CN111937818A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB121492A (en) * | 1917-09-12 | 1918-12-24 | Herbert Heron | A New or Improved Trawling Board. |
| US20080022913A1 (en) * | 2003-03-27 | 2008-01-31 | Rune Toennessen | System for Depth Control of a Marine Deflector |
| RU2292713C2 (en) * | 2004-11-26 | 2007-02-10 | Сергей Григорьевич Вантеев | Otter board (versions) |
| WO2011029958A1 (en) * | 2009-09-14 | 2011-03-17 | Hampidjan Hf | High efficiency, high stability, multi-elevation trawl door and methods |
| CN105766819A (en) * | 2016-03-09 | 2016-07-20 | 中国水产科学研究院东海水产研究所 | Method for adjusting work attack angle of euphausia superba dragnet horizontal expanding device |
| CN106386717A (en) * | 2016-11-23 | 2017-02-15 | 中国水产科学研究院东海水产研究所 | Rectangular curved otter board |
| CN209185453U (en) * | 2018-11-28 | 2019-08-02 | 湖南鑫海股份有限公司 | A kind of middle layer trawl lock bindiny mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 田春来等: "《机械CAD软件应用入门指导书》", 31 October 2019 * |
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Application publication date: 20201117 |
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| RJ01 | Rejection of invention patent application after publication |