Small aspect ratio rectangular double-curved-surface surface and middle layer net plate

A small aspect ratio, rectangular technology, applied in fishing nets, fishing, applications, etc., can solve the problems of limited adjustment range and decreased stability of the mesh plate, and achieve the effect of low drag coefficient and good expansion performance

Active Publication Date: 2013-09-04
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Limited by the structure and weight of the stencil itself, the adjustment range of this adjustment method is limited, and it will also lead to a decrease in the stability of the stencil

Method used

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  • Small aspect ratio rectangular double-curved-surface surface and middle layer net plate
  • Small aspect ratio rectangular double-curved-surface surface and middle layer net plate
  • Small aspect ratio rectangular double-curved-surface surface and middle layer net plate

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Embodiment Construction

[0018] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0019] Such as Figures 1 to 5 As shown, a small aspect ratio rectangular double-arc surface middle layer mesh panel includes a main panel 1, the two sides of the main panel 1 are hollow structures, the inner side and the outer side of the main panel 1 are arc-shaped curved surfaces, and the main panel 1 The curvature of the inner curved surface of the panel 1 is greater than that of the outer curved surface. The upper deflect...

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Abstract

The invention relates to a small aspect ratio rectangular double-curved-surface surface and middle layer net plate which comprises a main face plate (1). The bilateral sides of the main face plate (1) are hollow structures; the inner side and the outer side of the main face plate (1) are arc-shaped curved surfaces; the curvature of the arc-shaped curved surface which is arranged on the inner side of the main face plate (1) is larger than that of the arc-shaped curved surface which is arranged on the outer side; the top of the main face plate (1) is provided with an upper guide plate (3), the bottom of the main face plate (1) is provided with a lower guide plate (6), and the middle of the main face plate (1) is provided with a warp reinforcing plate (2); the warp reinforcing plate (2) is provided with a warp support (5) which is connected with the main face plate (1) though bilateral reinforcing ribs; and the upper guide plate (3) and the lower guide plate (6) are provided with cross rope connecting holes (4). The small aspect ratio rectangular double-curved-surface surface and middle layer net plate has the advantages of being good in expansion performance and low in resistance coefficient, enabling the hollow structures at two ends of the interior of the main face plate to provide part of buoyancy force and being applicable to surface layer and middle layer trawling operation.

Description

technical field [0001] The invention belongs to the technical field of marine fishery fishing tools, and in particular relates to a small-aspect-ratio rectangular double-arc surface-middle-layer net plate. Background technique [0002] The main function of the trawl net plate is to realize the horizontal expansion of the net gear during the fishing boat towing process and increase the sweeping area. When trawling in different water layers, the mesh plate also acts as a net settler to realize the vertical expansion of the net. During the operation, different target fish schools are not in the same water layer, so it is necessary to correctly adjust and control the net position. Aligning the net port to the dense center of the fish school is one of the key technologies for fishing success. At present, the most commonly used mesh panels in the world's trawl fishery include rectangular, oval, vertical curved, vertical curved "V"-shaped, slat-wing, and compound-wing mesh panels....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K73/02
CPCA01K73/045
Inventor 刘健黄洪亮李灵智陈帅冯春雷王磊徐国栋吴越徐冰
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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