Net cage lifting device with dual-system effect

Abstract

The invention discloses a net cage lifting device with the dual-system effect. The device comprises an equipment buoy, a deck arranged above the equipment buoy, a winch arranged on the deck and a netcage connected to the lower portion of the equipment buoy, wherein a guide pipe is fixedly connected to the periphery of the equipment buoy; a lifting stand column is arranged in the guide pipe; the net cage comprises a plane frame structure and an HDPE floating pipe; the plane frame structure is formed by fixedly connecting two longitudinal beams and three cross beams; corner bracing beams are arranged at the joints of the cross beams and the longitudinal beams; ballast tanks are arranged at the two ends of each longitudinal beam; the HDPE floating pipe floats above the plane frame structure;a central frame is arranged in the net cage; the central frame is fixedly connected with the plane frame structure; the central frame is fixedly connected with the lower end of the lifting stand column; the winch is fixedly connected with the central frame through a mooring rope; and the net cage is a flexible cage. The lifting motion of the net cage is cooperatively operated by a winch system and a discharging ballast system, so that actual lifting of the net cage is stable and efficient.

Description

technical field [0001] The invention relates to a lifting device for net cages with dual system functions. Background technique [0002] Due to environmental pollution caused by offshore aquaculture and the requirements for sustainable development, deep-sea cage aquaculture technology gradually replaces offshore aquaculture and occupies a dominant position. Deep-sea aquaculture often encounters bad weather such as typhoons, so there are also some products with submerged function in the market. The raising and lowering of the existing breeding cages is generally achieved in the following two ways: one is to adjust the heavy buoyancy of the cages by discharging ballast, specifically, the buoyancy or gravity can be changed by exhausting or draining The second is to directly pull the net cage through the driving mechanism (winch) to realize the lifting movement of the net cage within a certain depth range; the mode of discharging ballast is slow to adjust but the lifting of the ...

AI Technical Summary

Problems solved by technology

[0002] Due to environmental pollution caused by offshore aquaculture and the requirements for sustainable development, deep-sea cage aquaculture technology gradually replaces offshore aquaculture and occupies a dominant position. Deep-sea aquaculture often encounters bad weather such as typhoons, so there are also some products with submerged function in the market. The raising and lowering of the existing breeding cages is generally achieved in the following two ways: one is to adjust the heavy buoyancy of the cages by discharging ballast, specifically, the buoyancy or gravity can be changed by exhausting or draining The second is to directly pull the net cage through the driving mechanism (winch) to realize the lifting movement of the net cage within a certain depth range; the mode of discharging ballast is slow to adjust but the lifting of the net cage is relatively stable, and the driving mechanism directly pulls and drives the net cage to lift , the adjustment is relatively fast, but the required traction force is relatively large, especially in large sea cages, the traction force of a single winch may reach more than 50t, which results in huge equipment for the overall winch system, high input costs, and inconvenient maintenance in the later period

Images