CN2817425Y - Rectangular curved netting plate - Google Patents
Rectangular curved netting plate Download PDFInfo
- Publication number
- CN2817425Y CN2817425Y CN 200520043546 CN200520043546U CN2817425Y CN 2817425 Y CN2817425 Y CN 2817425Y CN 200520043546 CN200520043546 CN 200520043546 CN 200520043546 U CN200520043546 U CN 200520043546U CN 2817425 Y CN2817425 Y CN 2817425Y
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- plate
- web plate
- netting
- utility
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Abstract
The utility model relates to a netting plate of an expanding net in single-boat trawl fishing. The technical problem to be solved is to enhance the expanding performance and the stability of the netting plate. The technical scheme of the utility model is composed of an upper faceplate, a lower faceplate, a drag rope plate, a reinforcing plate, a lower box body, a pull iron, a cross rope plate and a triangular frame. The utility model is characterized in that the cross sections of the faceplates of the netting plates form a wing shape, and the aspect ratio is 0.80; the upper and the lower faceplates of the netting plate are connected in the shape of an obtuse angle; the front parts of the faceplates of the netting plate are provided with opening seams, the distance between the central lines of the seams and the front end of the netting plate is 28 percent of the length of a wing chord, the back edge of the seams are provided with flow guiding sheets with curvature of 9 percent and the included angle of the chord length of the flow guiding sheets and the wing chord of the netting plate is 35DEG. The utility model is suitable for the single-boat trawl fishing.
Description
Technical field:
The utility model relates to the web plate of expansion netting gear in the single boat trawl operation.
Background technology
Trawl board is installed on the place ahead of trawlnet two wings, utilizes the hydrodynamic force that produces in the towing, keeps the horizontal expansion of netting gear, thereby reaches the effect of fishing.Therefore, the quality of web plate performance is directly connected to the fishery harvesting efficient of trawlnet.The most frequently used web plate has four kinds of rectangle plane web plate, V-arrangement web plate, oval double leaf aperture plate plate and bottom high aspect ratio rectangle curved surface web plates (can be described as " vertical airfoil web plate " again) in China's single boat trawl fishery.The rectangle plane web plate is the web plate that uses the earliest, because it is simple in structure, cheap, easy to operate, therefore, still is widely used in China's ocean shrimp trawlnet and two support trawl-net fishing so far.But its hydrodynamic performance is relatively poor; The V-arrangement web plate is the all-metal construction web plate that grows up in the fifties in last century, and it is gained the name because of the web plate face is V-shaped, owing to its structure, simple, the good stability, easy to operate of manufacturing, therefore, is widely used in the medium and small single boat trawl fishery of China.Its major defect is that hydrodynamic performance is relatively poor, and is similar with the rectangle plane web plate basically; Ellipse double leaf aperture plate plate is the most frequently used web plate of the former Soviet Union, and aspect ratio is generally about 0.65, and China is mainly used in 294～441 kilowatts of trawler.This web plate has good stable, and spreading performance also is better than rectangle plane web plate and V-arrangement web plate.But structure more complicated, maintenance bother, the operating period is shorter; High aspect ratio rectangle curved surface web plate is the trawl board that grows up the eighties in last century, aspect ratio is greater than 1, be called vertical airfoil web plate again, its biggest advantage be the spreading performance of web plate apparently higher than the front three kinds of web plates, therefore be widely used in domestic and international large and medium-sized single hull bottom trawl-net fishing.But its structure more complicated, cost be higher, when using in seabed inferior, less stable.
The utility model content
The utility model technical issues that need to address are to improve the spreading performance and the stability of web plate.
Technical scheme of the present invention by top panel, lower panel, warp plate, stiffener, lower box, drag iron, fork guiding principle plate and tripod to form, the cross section that it is characterized in that the web plate panel is an airfoil, the aspect ratio of web plate is 0.80; Upper and lower panel links to each other in obtuse angle; The front portion of web plate panel is provided with the mouth that cracks, and seam width is 80mm, and the sealing center line is 28% wing chord length apart from the distance of web plate leading edge, and the trailing edge of sealing is equipped with the flow deflector of curvature 9%, and the angle of its chord length and web plate wing chord is 35 °.
The present invention because designed best aspect ratio, the position of cracking mouthful and the curvature of width and guide vane, thereby make web plate can obtain best hydrodynamic performance down in working order, experimental results show that when the angle of attack is 30 °, lift coefficient can reach 1.30, resistance coefficient is 0.67, and lift-drag ratio is 1.94.The spreading performance of web plate has reached the level of high aspect ratio rectangle curved surface web plate, and apparently higher than rectangle plane web plate, V-arrangement web plate and oval double leaf aperture plate plate, simultaneously, the stability of web plate also is better than the existing otter-trawl web plate of China.
Description of drawings
Fig. 1 represents front view of the present utility model;
Fig. 2 represents profilograph of the present utility model;
Fig. 3 represents the schematic cross section of the utility model in the warp plate position.
Embodiment
See accompanying drawing 1, the present invention adopts top panel 1, warp plate 5, lower panel 8, fork guiding principle plate 9, (Fig. 3) tripod 10 (Fig. 3) to form the full steel structure rectangular V-type curved surface web plate that peripheral outline becomes rectangle substantially; The outer rim weldering garden steel 3 of web plate is strengthened; The lower box 6 that steel plate is welded is equipped with in the web plate bottom, and its bottom is welded with the sled shape and drags iron 7; The front of web plate is welded with the stiffener 4 of four circles, and welds mutually with warp plate 5 with round bar, is beneficial to improve the bulk strength of web plate; Web plate upper and lower panel junction (being on the warp plate) is established the triangle stand and is rotated tripod 10; Web plate upper and lower plates face is 154 ° of obtuse angles and links to each other (seeing accompanying drawing 2), to keep the stability of web plate under in working order; Web plate plate face bends to airfoil, and aspect ratio is 0.80; The front portion of web plate is provided with the wide mouth that cracks of 80mm, and the sealing center line is 28% wing chord length apart from the distance of web plate leading edge, and the sealing trailing edge is equipped with the guide vane 2 of curvature 9%, is beneficial to improve the hydrodynamic performance of web plate; The spreading performance of this web plate has reached the level of high aspect ratio rectangle curved surface web plate, and is better than existing various low aspect ratio otter-trawl web plate, can keep advantages of higher stability simultaneously in the towing process.
Claims (2)
- Rectangle curved surface web plate by top panel, lower panel, warp plate, stiffener, lower box, drag iron, fork guiding principle plate and tripod to form, the cross section that it is characterized in that the web plate panel is an airfoil, aspect ratio is 0.80; The upper and lower panel of web plate links to each other in obtuse angle; The front portion of web plate panel is provided with the mouth that cracks, and seam width is 80mm, and the sealing center line is 28% wing chord length apart from the distance of web plate leading edge, and the trailing edge of sealing is equipped with the flow deflector of curvature 9%, and the angle of its chord length and web plate wing chord is 35 °.
- 2. rectangle curved surface web plate according to claim 1 is characterized in that the web plate upper and lower panel is 154 ° of angles and links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043546 CN2817425Y (en) | 2005-07-19 | 2005-07-19 | Rectangular curved netting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043546 CN2817425Y (en) | 2005-07-19 | 2005-07-19 | Rectangular curved netting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2817425Y true CN2817425Y (en) | 2006-09-20 |
Family
ID=37003478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520043546 Expired - Fee Related CN2817425Y (en) | 2005-07-19 | 2005-07-19 | Rectangular curved netting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2817425Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103250686A (en) * | 2013-06-13 | 2013-08-21 | 中国水产科学研究院东海水产研究所 | High-aspect-ratio double-arc surface-middle layer trawl board |
| CN103271005A (en) * | 2013-06-13 | 2013-09-04 | 中国水产科学研究院东海水产研究所 | Small aspect ratio rectangular double-curved-surface surface and middle layer net plate |
| CN103283691A (en) * | 2013-06-13 | 2013-09-11 | 中国水产科学研究院东海水产研究所 | Small-span-chord-ratio rectangular double cambered-surface middle-layer net plate and floating- gravitational force adjusting method thereof |
| CN103340186A (en) * | 2013-06-13 | 2013-10-09 | 中国水产科学研究院东海水产研究所 | High-aspect-ratio double-cambered-surface trawl otter board and buoyancy-sinking force ratio adjusting method thereof |
| CN103813710A (en) * | 2011-07-22 | 2014-05-21 | 阿特利·马尔·约瑟法特森 | A trawl door or paravane with remote control adjustment |
| 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 |
-
2005
- 2005-07-19 CN CN 200520043546 patent/CN2817425Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813710A (en) * | 2011-07-22 | 2014-05-21 | 阿特利·马尔·约瑟法特森 | A trawl door or paravane with remote control adjustment |
| CN103813710B (en) * | 2011-07-22 | 2017-03-29 | 阿特利·马尔·约瑟法特森 | The trawlnet door adjusted using remotely control or hydrofoil |
| CN103250686A (en) * | 2013-06-13 | 2013-08-21 | 中国水产科学研究院东海水产研究所 | High-aspect-ratio double-arc surface-middle layer trawl board |
| CN103271005A (en) * | 2013-06-13 | 2013-09-04 | 中国水产科学研究院东海水产研究所 | Small aspect ratio rectangular double-curved-surface surface and middle layer net plate |
| CN103283691A (en) * | 2013-06-13 | 2013-09-11 | 中国水产科学研究院东海水产研究所 | Small-span-chord-ratio rectangular double cambered-surface middle-layer net plate and floating- gravitational force adjusting method thereof |
| CN103340186A (en) * | 2013-06-13 | 2013-10-09 | 中国水产科学研究院东海水产研究所 | High-aspect-ratio double-cambered-surface trawl otter board and buoyancy-sinking force ratio adjusting method thereof |
| CN103271005B (en) * | 2013-06-13 | 2014-07-30 | 中国水产科学研究院东海水产研究所 | Small aspect ratio rectangular double-curved-surface surface and middle layer net plate |
| CN103340186B (en) * | 2013-06-13 | 2016-03-02 | 中国水产科学研究院东海水产研究所 | The two cambered surface trawl board of a kind of high aspect ratio and drift along and compare control method |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060920 Termination date: 20120719 |