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Upright hook-surface grid-type screen

A grid-like, curved surface technology, applied in fishing nets, applications, fishing, etc., can solve the problems of easy overturning, difficult net plates in the target water layer, high requirements for fishing boats towing force and towing speed, etc.

Inactive Publication Date: 2015-08-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual trawling operation, due to the influence of the large aspect ratio structure and weight, the net plate will change the towing direction at a large angle when encountering obstacles during towing, and it is easy to overturn. Higher, not suitable for small and medium-sized trawlers, especially when performing surface and middle layer operations, it is difficult to ensure that the mesh plate is in the target water layer

Method used

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  • Upright hook-surface grid-type screen
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  • Upright hook-surface grid-type screen

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Embodiment Construction

[0015] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0016] Depend on Figure 1 to Figure 3 As shown, an upright curved grid grid panel provided by the embodiment of the present invention is composed of an upper deflector 1, a large aspect ratio curved wing 2, a dragging reinforcement plate 3, and a lower deflector 4. Between the upper deflector 1 and the lower deflector 4, there are a plurality of large-aspect-ratio curved wing plates 2, and each curved wing plate starts along the wedge-shaped outer arc of the front end of the upper deflector 1 and the lower deflector 4, Arranged parallel to the rear at equal intervals, and set the dragging reinforcement board 3 to connect with...

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Abstract

The invention relates to an upright hook-surface grid-type screen which is composed of an upper diversion plate, a plurality of high-aspect-ratio hook-surface wing plates, drag-steel reinforcing plates and a lower diversion plate. The upright hook-surface grid-type screen is characterized in that the high-aspect-ratio hook-surface wing plates are arranged between the upper diversion plate and the lower diversion plate and are parallelly, backwardly and equidistantly arrayed starting from outer arcs of the front end of the upper diversion plate and the lower diversion plate, and the drag-steel reinforcing plates are connected with the high-aspect-ratio hook-surface wing plates to integrally form a grid type. The low-aspect-ratio upright hook-surface grid-type screen is formed by combination of the high-aspect-ratio hook-surface wing plates, thereby being better in stability and recovery performance, higher in hydrodynamic efficiency and suitable for use of different fishing boats different in gross ton and water operation different in drainage layer.

Description

technical field [0001] The invention belongs to the technical field of fishing tools for marine fishery, and in particular relates to an upright curved grid grid plate. Background technique [0002] The trawl net plate is an important attachment in the single-vessel trawling operation. Its main function is to expand the horizontal expansion of the net gear and increase the sweeping area of ​​the trawl net. At present, there are many common stencil structures and types, such as rectangular, V-shaped, vertical curved surface, slotted and so on. Among them, the advantage of the vertical curved surface stencil is that it adopts a large aspect ratio structure. The stencil is made into a curved surface, which reduces the eddy current on the back of the stencil, reduces the resistance of the stencil, improves the lift-to-drag ratio of the stencil, and improves the stencil. The hydrodynamic efficiency of the board. However, in the actual trawling operation, due to the influence of...

Claims

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Application Information

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IPC IPC(8): A01K73/045
CPCA01K73/045
Inventor 姜昭阳梁振林邓跃
Owner SHANDONG UNIV
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