Modular space truss structure light semi-submersible suspension cable deep sea net cage

Abstract

The invention discloses a modular space truss structure light semi-submersible suspension cable deep sea net cage. The net cage is characterized in that a net cage framework is modularly constructed and expanded by truss nodes and truss rod pieces, and comprises a top surface truss, a semi-submersible truss arranged on the top surface truss, and a bottom surface truss; the top surface truss and the bottom surface truss are multilayer trusses in the inner and outer directions and comprise buoyancy adjustable layers and buoyancy non-adjustable layers; the semi-submersible truss comprises a buoyancy adjustable layer; and a plurality of groups of suspension cables are included and are arranged between the top surface truss and the bottom surface truss. The net cage framework is constructed ina modular design mode, the multi-layer truss structure meets the requirement for good strength and safety, the unit use cost of equipment is greatly reduced, and a road is laid for large-scale offshore culture; through active adjustment of buoyancy adjustable points, the top surface truss and the bottom surface truss have the active approaching and folding functions, rapid contraction of the netting and the culture space is achieved, rapid fish collection or transfer is achieved in cooperation with pumping, and external disasters such as storms are avoided.

Description

technical field [0001] The invention belongs to the field of marine engineering devices, in particular to deep-sea aquaculture equipment, and specifically relates to a lightweight semi-submersible cable-suspended 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 ma...

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

[0012] Such net cages as CN109874716A, although they have suspension cables and snorkeling functions, all carry out vertical snorkeling with the net cage as a whole. It is necessary to catch fish by collecting the net, but it has to rely on external ship machinery, and the cage and the net body need to be separated first, which is prone to entanglement and incomplete separation. The machine will tear the net and cause a large loss of fish. Therefore, Mechanical net collection needs to be done carefully, which is very time-consuming and inefficient (this is also the case when nets are cleaned and replaced)

This problem becomes more prominent when the unpredictable wind and waves and other harsh external environments come. It is a big problem for ships to sail. The strength is not enough, and the ability to avoid risks is also insufficient. Therefore, accidents often occur in the suspension net cages after the storm, causing huge economic losses.

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