Single boat trawling semi-flexible foldable rectangular V-shaped otter board

Abstract

The invention discloses a single boat trawling semi-flexible foldable rectangular V-shaped otter board. The single boat trawling semi-flexible foldable rectangular V-shaped otter board comprises two rectangular rigid frames capable of rotating freely around a center shaft, wherein a cross rope connection point is arranged on each of the two rigid frames; the rigid frames are provided with two or more windows; the windows are provided with light water-impermeable flexible otter board surfaces; a plurality of length-adjustable rigid support rods stretch the two rigid frames, so that the stretched two rigid frames form a V-shaped structure with an adjustable included angle; the center shaft is provided with a perforated warp fixing sheet. By adopting the single boat trawling semi-flexible foldable rectangular V-shaped otter board, the weight of the rectangular V-shaped otter board is reduced, damage of the otter board to the seabed ecological environment is reduced, dragging resistance is reduced, and energy consumption in a fishing boat operation process is lowered; moreover, the single boat trawling semi-flexible foldable rectangular V-shaped otter board is simple in structure, is convenient for transportation, operation and assembly, is low in cost, and can be assembled and detached rapidly; damaged parts can be replaced rapidly in an operation process, and efficient, low-energy-consumption and environment-friendly fishing in single boat trawling operation is realized; the single boat trawling semi-flexible foldable rectangular V-shaped otter board can be widely applied to offshore small-sized single boat trawling fishing boat operation in China.

Description

technical field [0001] The invention relates to a "V"-shaped screen, in particular to a semi-flexible and foldable rectangular "V"-shaped screen for a single-boat trawl. Background technique [0002] Trawling is one of the main modes of operation in the modern marine fishing industry. It has the characteristics of flexibility, adaptability and high production efficiency. Since trawling is a kind of active fishing gear, it needs to rely on fishing boats to tow the nets for operation, so the fishing method is a very energy-intensive operation method, and the energy consumption during trawling operations accounts for 80% of the overall energy consumption of trawlers. As the world's fuel prices continue to rise, the cost of trawling operations continues to rise, and the efficiency of trawling fishing decreases. In addition, bottom trawls drag along the bottom during operation, which damages the seabed ecological environment and is not conducive to the sustainable development of ...

AI Technical Summary

Problems solved by technology

The traditional rectangular "V"-shaped stencil is an all-steel structure stencil, which is very heavy. During the operation, its surface is close to the seabed or even sinks into the seabed, which will not only have a huge impact on the seabed ecological environment, but also destroy the substrate environment. It will also increase the resistance during the operation, increase fuel consumption, and lead to an increase in operating costs

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