Method for automatically cleaning net cage underwater

Abstract

The invention provides a method for automatically cleaning a net cage underwater, and relates to agricultural and offshore buoyancy raft net cage culture. The scheme of the invention for solving the technical problems is that: the inner ring part of a circular hollow float is provided with a net scraper to form a circular hollow float net scraper; and the float net scraper is sleeved on the net cage and cannot break away from the net cage. When tidal current increases to a certain extent, the circular hollow float net scraper can move to the bottom of the net cage under the action of the tidal current; when the tidal current decreases to a certain extent, the circular hollow float net scraper freely floats to the top of the net cage by buoyancy per se; by virtue of ocean waves, the partial motion frequency quickens obviously, the circular hollow float net scraper constantly moves up and down on the net cage; and therefore, fouling cannot attach to and exist on the net cage. The methodhas the advantages of reducing buoyancy net cage culture cost, promoting and protecting nuisanceless and healthy growth of cultured shellfish, saving energy, reducing emission, saving labor and protecting environment.

Description

technical field [0001] The invention relates to agriculture and floating raft net cage culture on the sea, and uses current and waves as power to automatically clean the net cage at any time under water. technical background [0002] my country has a vast sea area, and the marine aquaculture industry is developing rapidly. The aquaculture production ranks first in the world, of which shellfish farming accounts for more than 70% of the total output. At present, floating raft net cage culture is widely used, and the pollution on the sea shellfish culture net cage The research on the prevention and control of molluscs has been carried out for many years, and many papers at home and abroad have reported that the influence of foulants attached to the cages on cultured shellfish is one of the main reasons for poor growth and death of shellfish. How to effectively prevent and remove the attachments on the aquaculture cages has become one of the important research topics in the aquac...

AI Technical Summary

Problems solved by technology

[0004] The multiple round-trip operations of ships not only increases labor costs, but also consumes a large amount of diesel oil and emits a large amount of carbon dioxide. During the whole process of cleaning on the shore, a large number of rotten attachments will bring new pollution to the sea area.

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