Cod-end euphausia superba continuous pump suction fishing system

Abstract

The invention provides a cod-end euphausia superba continuous pump suction fishing system. The system comprises a euphausia net, a shrimp suction pump and a camera; a net opening of the euphausia netis connected with a trawling pulley on a hull through a trawling steel rope, a second sensor is arranged at the net opening of the euphausia net and used for collecting conditions of euphausia entering the net at the net opening, net opening shape conditions and signals of depth position of the net in water; a cod end with an opening is arranged at the tail end of the euphausia net, and the cod end is provided with a first sensor which is used for collecting the number of euphausia in the cod end and signals of depth position of the euphausia in the water; an inlet of the shrimp suction pump is connected with the opening of the cod end, an outlet of the shrimp suction pump is connected with a hose, and an outlet end of the hose is connected with a cold sea water tank / a shrimp-water separator on the hull; the camera is arranged on the shrimp suction pump and aligned to a suction port of the cod end, and electric power of the camera is provided by a composite cable. Accordingly, by adopting continuous pump suction, not only are the amount of fishing and the fishing efficiency improved, but also the quality of the euphausia is improved.

Description

technical field [0001] The invention relates to fishing equipment for Antarctic krill, in particular to a continuous pumping fishing system for Antarctic krill at the mesh end. Background technique [0002] The Antarctic krill division is 18.4 million km in Antarctica 2 In the sea area, the amount of resources reaches 3 billion tons, and the catchable amount reaches 100 million tons. The annual fishing limit is basically maintained at about 900,000 tons, while the actual annual global catch does not exceed 200,000 tons, and China does not exceed 30,000 tons. [0003] The annual catch is mainly limited by fishing methods. At present, there are two main fishing methods for Antarctic krill: traditional broadside truss trawl and traditional net plate trawl. Compared with traditional net plate trawl, side quilted trawl is more efficient. The amount of catch is large, but both fishing methods have disadvantages: [0004] 1. The net needs to be lifted and released frequently, and...

AI Technical Summary

Problems solved by technology

[0004] 1. The net needs to be lifted and released frequently, and the operation time of lifting and releasing the net occupies more than half of the entire fishing time, which restricts the effective trawling time and affects the fishing efficiency;

[0005] 2. There are many operators, the operation is complicated and the work intensity is high;

[0006] 3. Traditional side girder trawls are not suitable for deep trawls, and traditional panel trawls are not suitable for surface trawls, and the fishing efficiency is low;

[0007] 4. The traditional side girder trawling needs to be extended outboard from the ship, and the net gear will exert a lateral overturning moment on the ship, which will affect the stability of the ship and bring safety hazards;

[0008] 5. Krill is easily crushed, affecting the quality of krill;

[0009] 6. The interval between secondary fishing is long, and the krill is stored for a long time, which seriously affects the quality of krill;

[0010] 7. The frequent use of deck trawling machinery not only reduces its service life, but also consumes energy, which is neither environmentally friendly nor economical

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