Flow-reducing and storm-resistant deepwater net cage

Abstract

The invention provides a flow-reducing and storm-resistant deepwater net cage with a'double-net 'structure. The flow-reducing and storm-resistant deepwater net cage can resist a severe marine environment, can effectively reduce a volume loss of the net cage, and provides a safe and stable culture net cage device for fish culture in deep and far sea. The flow-reducing and storm-resistant deepwater net cage comprises a net cage frame system composed of an outer floating frame, an inner floating frame, 120-degree elbows, I-shaped supporting frames and 60-degree elbows, a net cage double-layer netting device composed of a front-end flow-reducing protective netting and a rear-end protective netting, and a mesh bag system composed of a netting, a sinking rope and a bottom frame. The deep sea net cage frame system is subjected to a reasonable structural design, based on a structural stability principle, an appearance of the floating frames is of a stable triangular structure, an interior of the floating frame is of a honeycomb hexagonal structure, the front-end and rear-end double-net protective netting system is used, through a triangular frame structure outside the net cage, a top end of the net cage always faces a wave flow under the action of the wave flow, effects of breaking and reducing waves are achieved, such that an acting force of the waves on the net cage is reduced. In addition, the front end of the mesh bag system is of a sinking rope structure, such that deformation of a mesh bag can be reduced. The 'double-net' protective netting system can play a role in shunting and blocking ocean current, can effectively resist the action of heavy stormy waves and strong ocean current on the net cage, such that the culture volume loss of the net bag is reduced, the activity space of cultured fishes in the net bag is ensured, and escape possibility of fish schools is greatly reduced.

Description

technical field [0001] The invention relates to a "double net" structure deep-water net cage for reducing flow and resisting wind and waves. Background technique [0002] In recent years, the space and environmental constraints of coastal mariculture have become increasingly obvious. Large-scale mariculture in shallow waters near the coast has brought irreversible ecological loss, disease risk, quality and safety to the environment. A series of problems. Therefore, it has become an inevitable choice for the development of my country's mariculture industry to expand mariculture from nearshore to offshore and to deep sea. At present, the technical bottlenecks of deep-sea cages are as follows: ① often face severe sea conditions such as strong winds and waves, strong currents and typhoons, which can easily cause large deformations of the cages and lead to structural damage of the cages. ②The deformation of the net cage caused by the sea current will reduce its effective culture...

AI Technical Summary

Problems solved by technology

At present, the technical bottlenecks of deep-sea cages are: ① Frequently facing harsh sea conditions such as strong winds and waves, strong currents, and typhoons, it is easy to cause large deformations of the cages, resulting in structural damage to the cages

②Cage deformation caused by ocean currents will reduce its effective aquaculture volume, increase the environmental pressure on aquaculture fish, and affect its growth

At present, the types of anti-wind and wave cages in my country cannot fully meet the needs of cage culture in deep and high seas. The development of new types of current-reducing and anti-wind and wave cages suitable for deep and deep seas is the technical demand for promoting the development of cage culture in my country from offshore to deep seas.

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