Quickly liftable net cage

Abstract

The invention provides a quickly liftable net cage, and belongs to the technical field of net cages. The net cage comprises a net cage body and a plurality of lifting devices, wherein the multiple lifting devices are arranged on the net cage body; each lifting device comprises a first piston cylinder, a first piston, a second piston cylinder, a piston rod, a driving mechanism, a water inlet and outlet mechanism and an air inlet and outlet mechanism; the first piston cylinders are fixedly arranged on the net cage body; the first pistons are slidably arranged in the first piston cylinders; the second piston cylinders are fixedly arranged below the first piston cylinders; the piston rods are slidably arranged at the upper ends of the second piston cylinders; the second pistons are fixedly arranged at the lower ends of the piston rods; the upper ends of the piston rods are fixedly connected with the first pistons; the second pistons divide the interiors of the second piston cylinders intoupper cavities and lower cavities; the driving mechanisms can push the first pistons to slide up and down; the water inlet and outlet mechanisms can control water feeding and discharging of water storage cavities; and the air inlet and outlet mechanisms can control air feeding and discharging of the upper cavities and the lower cavities. The net cage can be rapidly lifted according to sea conditions, so that the storm resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of net cages, and relates to a rapidly lifting net cage. Background technique [0002] Cage culture is an intensive aquaculture technique that is widely used for fish farming using cages. [0003] Cage aquaculture is booming, and many national and provincial projects are vigorously promoting the development of marine cage aquaculture. Breeding in the open sea, the water quality is stable, the water body has a large capacity, and the water body exchange is fast. The residual feed and feces are not easy to accumulate at the bottom of the cage, which can avoid water pollution. However, the open sea area lacks shelter and the current is strong. For example, the characteristic flow velocity in the open sea area of ​​the East China Sea can reach more than 1.0 m / s, and some areas can reach 1.5 m / s. The domestic mainstream deep-water cages are difficult to resist the impact of strong currents, and the volume loss ...

AI Technical Summary

Problems solved by technology

Domestic mainstream deep-water cages are difficult to resist the impact of strong currents, and the volume loss of breeding is serious

On the other hand, it is also difficult for breeding objects to resist the continuous impact of water flow above 1.0 m / s for a long time, which can easily lead to fatigue death

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