Primary frame of valveless lift type deep water net cage

Abstract

A main frame of a valveless lifting deep water net cage comprises a float pipe and a connecting frame, wherein the float pipe comprises an inner round float pipe and an outer round float pipe which are arranged at concentricity and are fixed on the same level surface through the connecting frame; and both the inner round float pipe and the outer round float pipe are provided with water inlet / outlet ports and air inlets. When the air inlets and the water inlet / outlet ports are opened at the same time, and water is fed in the float pipe from the water inlet / outlet ports, the net cage can be controlled to submerge to a predetermined depth; when compressed air is fed in from the air inlets, the water in the float pipe is discharged from the water inlet / outlet ports so as to ensure that the net cage rises to water surface. The main frame of the valveless lifting deep water net cage can be used to carry out safety aquatic breeding in an open sea area at a depth of between 20 and 60 meters; before a typhoon or a red tide, the net cage can be settled to a predetermined depth within 15 to 20 minutes when submerged at a depth of 8 m, thereby avoiding damages on the net cage caused by typhoon and ocean wave, or damages on the fishes bred in the net cage caused by the red tide.

Description

technical field [0001] The invention relates to a deep-water net cage used in the seawater net-cage culture industry, in particular to a main frame of a valveless lifting type deep-water net cage. Background technique [0002] Marine cage culture is a high-input, high-yield, high-risk farming method. At present, there are about 1 million cages along the coast of my country, most of which are distributed in the southeast coastal harbors, but the cage facilities and breeding technology are relatively backward, and there are many problems. The existing net cages in my country have low technological content and crude materials. Most of them are floating row net cages with simple structures, not strong enough and easy to deform, poor wind and wave resistance, and unstable production. When Typhoon No. 9615 hit Guangdong in 1996, it destroyed more than 40,000 net cages. When Typhoon Feiyan No. 2 hit Fujian Province in 2001, it destroyed 213,800 net cages, causing heavy economic lo...

AI Technical Summary

Problems solved by technology

[0003] In addition, due to the above-mentioned defects in the existing cage structure, cage culture is mainly concentrated in near-shore harbor waters and semi-enclosed bays, and the water exchange rate is low, making the breeding density in many areas exceed the environmental load

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