Light semi-submersible deep sea net cage with modular space truss structure

Abstract

The invention discloses a light semi-submersible deep sea net cage with a modular space truss structure. The net cage is characterized in that: a net cage frame is constructed and expanded by truss nodes and truss rod pieces in a modular mode and comprises a totally-closed or bottom-opened semi-closed light cage-shaped space truss structure and a semi-submersible truss arranged on the light cage-shaped space truss structure; the truss nodes comprise buoyancy adjustable nodes and buoyancy non-adjustable mechanical nodes, and the truss rod pieces comprise connecting rods among the buoyancy adjustable nodes, connecting rods among the mechanical nodes and connecting rods among interlayer nodes; the light cage-shaped space truss structure is a multi-layer truss in the internal and external directions; the semi-submersible truss comprises a buoyancy adjustable layer; and a plurality of light schemes are respectively constructed on the top surface truss, the side surface trusses and the bottom surface truss. A standardized structure is adopted, the universality of parts is good, the structure is simple, production, installation and maintenance are convenient, the loss rate of aquaculturewater due to ocean currents and stormy waves is small (smaller than or equal to 5%), the unit use cost of equipment is greatly reduced, and a road is laid for large-scale offshore aquaculture.

Description

technical field [0001] The invention belongs to the field of marine engineering devices, especially deep-sea aquaculture equipment, and specifically relates to a lightweight semi-submersible deep-sea net cage with a modular space truss structure. Background technique [0002] The excessive development of my country's near-shore mariculture has made the resource and environment carrying capacity reach or approach the upper limit. Therefore, the development of deep-sea aquaculture in offshore areas is an important means of building a modern marine industry system. However, the "wind and wave resistance" and "Benefits" these two outstanding issues. [0003] There are an average of 28 typhoons every year in the Northwest Pacific Ocean and the South China Sea, of which 7 typhoons affect my country's coast on average. In many waters outside the bays of our country, there are high winds and high waves, and the seawater flows fast. During the development of mariculture in my countr...

AI Technical Summary

Problems solved by technology

In the development of marine aquaculture in my country, high-density polyethylene (HDPE) floating cages have become the leading equipment, but the problem of wind and wave resistance has not been fundamentally resolved

In the development of marine aquaculture in my country, high-density polyethylene (HDPE) floating cages have become the leading equipment, but the problem of wind and wave resistance has not been fundamentally resolved

In September 2011, two typhoons "Nasha" and "Nig" landed in Hainan one after another. The deep-water aquaculture cages in Lingao County, Hainan Province were almost wiped out, and they could not resist the super typhoon at all.

[0009] The deformation of deep-water cages due to ocean currents cannot be ignored. In the case of ordinary gravity cages with a water flow of 1 m / s, the volume loss rate of the cages can be as high as 80%, which greatly compresses the aquaculture water body and is not conducive to fish growth.

[0010] Net cleaning and replacement mainly rely on manual operation, the underwater operation is difficult, and the anti-fouling technical requirements are high

[0011] The stress response of fish in aquaculture is also prominent. The environment of deep-sea aquaculture is more complex, with many and uncertain factors such as wind, air pressure, water flow, temperature, light, and salinity. It is a natural action to overcome the stress response, and lacks the technical means and ability to adapt and adjust to the environment. Therefore, the stress response of fish is more serious and uncontrollable, resulting in slow growth and development of fish, decreased reproductive ability, and low immune function. increased morbidity and even sudden death

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