CN102197791A - Shrimp trawl net selection device with hexagonal sieve mesh structure - Google Patents
Shrimp trawl net selection device with hexagonal sieve mesh structure Download PDFInfo
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- CN102197791A CN102197791A CN 201010130062 CN201010130062A CN102197791A CN 102197791 A CN102197791 A CN 102197791A CN 201010130062 CN201010130062 CN 201010130062 CN 201010130062 A CN201010130062 A CN 201010130062A CN 102197791 A CN102197791 A CN 102197791A
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- outside framework
- shrimp
- annular outside
- trawlnet
- hexagonal mesh
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Abstract
The invention discloses a shrimp trawl net selection device with a hexagonal sieve mesh structure, relating to fishing equipment and aiming to provide a shrimp trawl net selection device with a hexagonal sieve mesh serving as a partition grill. In the technical scheme disclosed by the invention, an annular outer framework and a fixed framework are adopted. The shrimp trawl net selection device is characterized in that the annular outer framework is provided with a mounting hole in a position corresponding to the fixed framework; and mesh positioning holes are uniformly distributed on the annular outer framework according to a certain distance, the annular outer framework is internally provided with a hexagonal sieve mesh serving as a partition grill, the horizontal hanging ratio of the hexagonal sieve of the annular outer framework is 0.3-0.45, and the length of a mesh wire between every two sieve nodules is 15mm.
Description
Technical field
The present invention relates to fishing gear equipment, especially device is fished in the selection of fishing for object at trawlnet.
Background technology
Show that according to FAO's ASSOCIATE STATISTICS data the discarded by-catch that the shrimp trawl-net fishing is caught accounts for about 70% of the discarded by-catch total amount of global ocean fishery, has caused huge waste, and has destroyed fishery resources.In order to alleviate the breakdown strength of shrimp trawlnet to fishery resources, each fishery country has carried out the research of selectivity device, in the hope of reducing catching of by-catch, protects fishery resourses, and reaches the Sustainable utilization of resources purpose.
At present, the fishes and shrimps separation selectivity device of comparative maturity in the world, its framework adopts rigid structure mostly with the inner grizzly bar of separating, and its advantage is to use the life-span long, and controls the spacing of grizzly bar easily, reaches the selection of fishing for object at difference and fishes for.The shortcoming that rigid structure is separated grizzly bar selectivity device is a selectivity device heaviness, and area occupied is big, use and preservation inconvenience, and the maintenance trouble, cost is higher.In addition, rigid mount is subjected to the impact of current in the trawlnet process, self is easier to distortion, and effect and performance are separated in influence, simultaneously the fish surface are also produced certain damage, has influenced the fish survival rate that discharges by device.
Summary of the invention
The purpose of this invention is to provide a kind of by the shrimp trawlnet selectivity device of hexagonal mesh net sheet as grille; to solve the deficiency of rigidity trawlnet selectivity device technique; minimizing improves juvenile fish escape survival rate to the damage of escape juvenile fish, rationally utilizes and protect marine fishery resources.
Technical scheme of the present invention adopts annular outside framework and fixed frame, it is characterized in that the annular outside framework is identical with the fixed frame external profile diameter, and corresponding position is shaped on installing hole; The even at a certain distance distribution of net sheet locating hole of annular outside framework, assembling hexagonal mesh net sheet is as grille in the annular outside framework, the horizontal hanging ratio 0.3～0.45 of hexagonal mesh in the annular outside framework, the netting twine length between every mesh tubercle is 15mm.
Outstanding feature of the present invention is that the grille in the selectivity device outside framework adopts hexagonal mesh flexible net sheet, has solved the deficiency of original rigidity trawlnet selectivity device technique, has reduced maintenance difficulty and cost, has improved operating characteristics.By application flexibility net sheet, reduce damage to the escape juvenile fish, improve escape juvenile fish survival rate.Show that through the ocean experiment the present invention has the remarkable result of reasonable utilization and protection marine fishery resources.
Description of drawings
Fig. 1 is the shrimp trawlnet selectivity schematic representation of apparatus of hexagonal mesh net chip architecture.
Fig. 2 is the fixed frame schematic diagram of shrimp trawlnet selectivity device.
Embodiment
The annular outside framework 3 (Fig. 1) of this device all adopts the aluminium alloy of thickness 6mm to make with fixed frame 6 (Fig. 2); Annular outside framework 3 is identical with fixed frame 6 external profile diameters, and is 0.7m～0.8m, and the inner edge diameter is than the little 16mm of external profile diameter; At fixed frame 6 installing hole 5 (Fig. 2) that 4 diameters are set is 8mm, at annular outside framework 3 installing hole 1 (Fig. 1) that 4 diameters are set too is 8mm, fixed frame 6 is corresponding with the position of the installing hole that outside framework 3 is provided with respectively; Annular outside framework 3 makes the net sheet keep certain shape in operation process by being the net sheet locating hole 4 (Fig. 1) of 4mm every 8cm spacing drill diameter; The net sheet 2 (Fig. 1) of hexagonal mesh is according to the horizontal hanging ratio 0.3～0.45 of mesh, and evenly being assemblied in the annular outside framework by net sheet locating hole 4 becomes grille, and the netting twine length between the net sheet mesh tubercle of this hexagonal mesh is 15mm.Fixed frame 6 is installed on the net capsule and the body junction of shrimp trawlnet, and makes fixed mount and horizontal plane shape angle at 45, and the annular outside framework 3 usefulness screws that the net sheet will be installed again are fixed on the fixed frame 6.
Claims (5)
1. the shrimp trawlnet selectivity device of a hexagonal mesh net chip architecture adopts annular outside framework and fixed frame, it is characterized in that the annular outside framework is identical with the fixed frame external profile diameter, and corresponding position is shaped on installing hole; The even at a certain distance distribution of net sheet locating hole of annular outside framework, assembling hexagonal mesh net sheet is as grille in the annular outside framework, the horizontal hanging ratio 0.3～0.45 of hexagonal mesh in the annular outside framework, the netting twine length between every mesh tubercle is 15mm.
2. the shrimp trawlnet selectivity device of a kind of hexagonal mesh net chip architecture according to claim 1 is characterized in that annular outside framework and fixed frame all adopt the aluminium alloy of thickness 6mm to make.
3. the shrimp trawlnet selectivity device of a kind of hexagonal mesh net chip architecture according to claim 1 is characterized in that annular outside framework and fixed frame external profile diameter are 0.7m～0.8m, and the inner edge diameter is than the little 16mm of external profile diameter.
4. the shrimp trawlnet selectivity device of a kind of hexagonal mesh net chip architecture according to claim 1, the installing hole diameter that it is characterized in that annular outside framework and fixed frame is 8mm.
5. the shrimp trawlnet selectivity device of a kind of hexagonal mesh net chip architecture according to claim 1 is characterized in that the net sheet locating hole spacing 8cm of annular outside framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010130062 CN102197791A (en) | 2010-03-22 | 2010-03-22 | Shrimp trawl net selection device with hexagonal sieve mesh structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010130062 CN102197791A (en) | 2010-03-22 | 2010-03-22 | Shrimp trawl net selection device with hexagonal sieve mesh structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102197791A true CN102197791A (en) | 2011-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010130062 Pending CN102197791A (en) | 2010-03-22 | 2010-03-22 | Shrimp trawl net selection device with hexagonal sieve mesh structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN102197791A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1927283A1 (en) * | 2006-11-28 | 2008-06-04 | Danny Gallagher | A netting arrangement |
| KR100878839B1 (en) * | 2008-09-04 | 2009-01-14 | 대한민국 | Bycatch reduction device for shrimp trawl |
| CN201332632Y (en) * | 2008-09-08 | 2009-10-28 | 中国水产科学研究院东海水产研究所 | Circular rigid fish shrimp separation device for shrimp trawl |
| CN201349448Y (en) * | 2009-01-19 | 2009-11-25 | 上海海洋大学 | Beam trawl net sheet fish and shrimp separation device |
-
2010
- 2010-03-22 CN CN 201010130062 patent/CN102197791A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1927283A1 (en) * | 2006-11-28 | 2008-06-04 | Danny Gallagher | A netting arrangement |
| KR100878839B1 (en) * | 2008-09-04 | 2009-01-14 | 대한민국 | Bycatch reduction device for shrimp trawl |
| CN201332632Y (en) * | 2008-09-08 | 2009-10-28 | 中国水产科学研究院东海水产研究所 | Circular rigid fish shrimp separation device for shrimp trawl |
| CN201349448Y (en) * | 2009-01-19 | 2009-11-25 | 上海海洋大学 | Beam trawl net sheet fish and shrimp separation device |
Non-Patent Citations (3)
| Title |
|---|
| 《上海水产大学学报》 20041231 张健等 桁杆张网渔具菱形和方形网目网囊的选择性研究 第428-334页 1-5 第13卷, 第4期 * |
| 《中国水产科学》 20080930 张健等 桁拖网渔具分隔网片对虾类的分隔效率 第845页第1栏9-12行，第846页1.2中1-6行 1-5 第15卷, 第5期 * |
| 《海洋渔业》 20090831 许永久等 六角形目和无结菱形目经编网片阻力性能与运动变化的比较 第300-307页 1-5 第31卷, 第3期 * |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110928 |