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External tractive lifting-control device and method for offshore cages

A lifting control and traction-type technology, which is applied in the field of additional traction-type offshore marine cage lifting control devices, can solve the problems of easy damage, death or injury, and breeding loss of cage equipment, and achieve the convenience of large-scale promotion and application, Guarantee the effect of production safety and convenient management

Active Publication Date: 2012-12-19
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Floating offshore marine aquaculture cages have the advantages of good wind and wave resistance of cage equipment, relatively low cost of cages, and convenient breeding operation and management under normal sea conditions; When the climate and sea conditions are severe, the cage equipment is easily damaged, causing the fish in the cage to escape, or the fish cultured in the cage may die or be injured due to the harsh sea conditions, which will cause serious breeding losses.

Method used

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  • External tractive lifting-control device and method for offshore cages
  • External tractive lifting-control device and method for offshore cages
  • External tractive lifting-control device and method for offshore cages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] For the original high-density polyethylene double-tube floating offshore marine culture cage with a diameter of 40m and a depth of 8m, the specification of the high-density polyethylene tube used as the buoyancy frame is D250mm (outer diameter) × 10mm (wall thickness), The total length of the high-density polyethylene pipe after the double-pipe welding is about 80m, and its total buoyancy F float = ρ seawater gV, where V = 3.9m 3 , the total buoyancy is about 39kN; the sinker weight of the conventional aquaculture cage is about 7-9kN; the net buoyancy of this specification floating offshore marine aquaculture cage is about 30kN.

[0037] The invention relates to buoys, the diameter of the cylinder is 1000mm, the height is 1500mm, and the bottom surface of the superimposed cone at one end has a diameter of 1000mm and a height of 500mm, each of which has a drainable volume V=1.3m 3 , the buoyancy is about 13kN; a cast iron weight with a weight of 10kN in the water is hung...

Embodiment 2

[0040] Similar to Example 1, for the high-density polyethylene double-tube floating offshore marine culture cage with a diameter of 50m and a depth of 8-10m, the specification of the high-density polyethylene pipe used as the buoyancy frame is D250mm (outside Diameter) × 10mm (wall thickness), the total length of the high-density polyethylene pipe after the double-pipe welding is about 100m, and its total buoyancy is about 49kN; the net buoyancy calculated according to the weight of 9kN counterweight of the conventional culture cage is about 40kN.

[0041] In this implementation example, the diameter of the cylinder and the diameter of the bottom surface of the superimposed cone at one end are both 1200mm (other parameters are the same as in Example 1), and the drainable volume of each is about V=1.9m 3 , the buoyancy is about 19kN; a cast iron weight with a weight of 15kN in water is hung under the buoy. Complete four external hangings that are suspended with weight buoys wit...

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Abstract

The invention relates to external tractive lifting-control device and method for offshore cages. The device comprises a buoy. A winch for winding to pay out and take in a traction rope is disposed in the buoy. A rope winding-unwinding tubular duct is disposed below the winch. The traction rope is wound on the winch. The traction rope passes through the rope winding-unwinding tubular duct and extends out of the buoy. The traction rope is connected with a weight driving an offshore cage to sink. The method includes: adding four control devices to junction points at four corners of a square anchor rope frame outside a floating offshore aquaculture cage respectively; connecting the floating offshore aquaculture cage with the buoy and the weight respectively with ropes; and releasing the weight towards the sea bed through the buoy, and drawing the floating offshore aquaculture cage to sink through the weight. By the device and the method, the floating offshore aquaculture cage without functions of sinking and floating can sink and float safely.

Description

technical field [0001] The invention relates to the technical field of offshore marine aquaculture equipment, in particular to an external traction type offshore marine cage lifting control device and method. Background technique [0002] Offshore marine aquaculture cages are divided into floating type, submersible type and lifting type according to their underwater state. At present, most of the floating offshore marine culture cages use high-density polyethylene floating pipes as the buoyancy frame, or steel welded frames with additional buoyancy accessories as the buoyancy frame. The shape of the buoyancy frame includes circle, square, hexagon or polygon. Under the buoyancy frame, a box (mesh bag) assembled by woven mesh of synthetic fiber material is hung, and sinkers are hung at the bottom to form the space (volume) of the box; or a mesh material made of metal mesh and metal outer composite plastic Assembled box. Floating offshore marine aquaculture cages have the adv...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 王鲁民
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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