Method for automatically cleaning net cage underwater

Abstract

The invention relates to removal of fouling organisms on seaborne buoyant raft culture net cages, in particular to a method for automatically cleaning a net cage underwater. A bamboo pole penetrates through round holes in the centers of net cage separating plates in sequence, the net cage is straightened to the longest supporting state, the diameters of netting are basically identical, the net cage separating plates are on the same axis, the net cage is sleeved with a net scraper, locating rings are arranged on the upper and lower net cage separation plates so that the upper portion and the lower portion of the net scraper cannot be separated from the net cage, a sandbag is arranged on the lower portion of the net cage so that the time of the net cage drooping on the sea surface can be prolonged, the net cage is connected with a raft body through hanging ropes, and the upper portion of the raft body is connected with a buoyancy ball through a buoyancy rope. The net scraper can float to the top of the net cage without tides, the net scraper can move to the bottom of the net cage when the tides are increased to a certain degree, the net scraper can do high-frequency motion on the local portion of the net cage in the process through sea waves, and the movement has larger impact force so that the fouling organisms cannot be attached to the net cage to survive. The method has the advantage that the work efficiency of automatically cleaning the net cage underwater by the net scraper is improved.

Description

technical field [0001] The invention relates to the prevention and removal of fouling organisms on net cages for floating raft culture in the agricultural sea, and is a method for automatically cleaning the net cages under water by the power of tidal currents and sea waves. Background technique [0002] At present, patents such as "a method for automatically cleaning the net cage underwater" and "a device for automatically cleaning the net cage underwater" have been authorized. The specific technical solutions are to scrape a circular float net (hereinafter referred to as Net scraper) is set on the cage and makes it impossible to leave the cage up and down. Its working principle is: when there is no tide, the net cage is perpendicular to the sea surface, and the net scraper floats to the top of the net cage by its own buoyancy; as the tide continues to increase, the net cage will swing to the direction of the tide, when the swing angle reaches a certain level At this time, ...

AI Technical Summary

Problems solved by technology

In the currently used cages, the partitions are connected by nets. This soft connection leads to inconsistent diameters of the nets between the two partitions. The closer to the partitions, the larger the diameter. The diameter of the net in the middle of the partition will become smaller. In addition, due to the soft connection between the cage partition and the partition, when the cage is underwater, the partition as a whole is often not on the same axis line. The reason can make the net scraper stuck in a certain position of the net cage, and it is difficult to realize the predetermined up and down movement of the net scraper relative to the net cage

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