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Net cage for fish culture

A technology of cages and nets, applied in fish farming, application, climate change adaptation, etc., can solve problems such as limiting the expansion of cage culture space, inability to eat normally, and damage.

Inactive Publication Date: 2005-05-04
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the changing direction of the tidal current in some aquaculture sea areas of our country and the high flow velocity at different water levels, the above-mentioned cages have obviously encountered some problems in actual use: when the water flow exceeds a certain speed, the fish will excessively consume their physical strength due to swimming against the current , unable to eat normally, so unable to obtain energy to grow the body, until heart failure and death
Moreover, the net cages are generally severely damaged after being impacted by multi-flow trends.
Therefore, the expansion of cage culture space in fishable waters is limited

Method used

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  • Net cage for fish culture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Figures 1 and 2 are schematic diagrams of the structure of the fish culture cage according to the first embodiment of the present invention. The center of the fish culture cage is provided with a horizontal rigid structure—the central pontoon 8, which has at least One row of support rods 1, two rows of support rods 1 are exemplified in this embodiment.

[0024] The connection between the two rows of support rods 1 and the central pontoon 8 is hinged support. The use of a hinged connection has the advantage that if the force acting on the support rod 1 is too large, the support rod 1 can swing backwards, which acts as a buffer and prevents the cage structure from being damaged by the instantaneous impact load. The support rods 1 are arranged radially in the circumferential direction of the central pontoon 8.

[0025] Several weft ropes 2 are connected to the top of the support rod 1 one by one to form a loop and are tensioned so that the support rod 1 will not swing in the c...

Embodiment 2

[0033] Such as image 3 , 4 Shown is a schematic structural view of a fish culture cage according to a second embodiment of the present invention. The cage has a horizontal rigid structure-a central pontoon 8, and at least one ring member 24. The example in this embodiment Take two ring members 24.

[0034] The structure and working mode of the center pontoon 8 and its internal air chambers 21a, 21b, inner sinking and floating chambers 22a, 22b, and outer sinking and floating chambers 23a, 23b, and the choke cover 3 are the same as those described in the first embodiment. To repeat.

[0035] The two ring members 24 are arranged on the outer circumference with the central pontoon 8 as the central axis. The ring member 24 referred to here can be multi-deformable (such as triangle, quadrilateral, etc.) or circular ring.

[0036] The warp rope 9 is pulled from one end of the central pontoon 8 to the annular member 24 and connected to it, and then pulled from the annular member 24 to t...

Embodiment 3

[0040] Figures 5 and 6 are schematic diagrams of the structure of a fish farming cage according to a third embodiment of the present invention. The cage has a horizontal rigid structure-a central pontoon 8, and at least one annular member 24, In this embodiment, two ring members 24 are exemplified.

[0041] The structure and working mode of the center pontoon 8 and its internal air chambers 21a, 21b, inner sinking and floating chambers 22a, 22b, and outer sinking and floating chambers 23a, 23b, and the choke cover 3 are as described in the first embodiment. More details.

[0042] The frame structure of the net cage facing the water flow is a rigid body 16, and the surface is covered with a spherical (or parabolic or pyramidal surface, etc.)-shaped baffle cover 3 to resist the impact of strong water flow. At least one ring member 24 is provided in the middle. The rope 9 is drawn from one end of the central pontoon 8 to the annular member 24 and connected to it, and then drawn from ...

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Abstract

The present invention is aimed at designing a net cage for fish culture. Said structure is characterized by that a central buoyancy float of set on the horizontal direction, two rows of supporting bars are hinged with said central buoyancy float, several weft ropes are one-by-one connected with top portions of the said supporting bars so as to form the form of ring, several warp ropes are connected to the top portions of supporting bars from one end of central buoyancy float, then are connected to another end of said central buoyancy float, the net pieces can be successively connected with the frame enclosed by warp ropes and weft ropes to form a closed form, besides, the anchoring end of the net cape also is equipped with a flow-resisting cover. Besides, said invention also provides the application method of said invented net cage for fish culture.

Description

(1) Technical field [0001] The invention relates to a fish farming cage. (2) Background technology [0002] Cage aquaculture in my country started with freshwater aquaculture. In 1973, cage culture of freshwater fish began, and it soon succeeded and spread rapidly. In 1994, the national reservoirs, lakes, and large-surface fish cages reached 150,000 mu. Seawater cage fish culture started in Guangdong and Fujian provinces in the 1980s. At present, the number of cages nationwide has grown to nearly 1 million, and the output of cage fish culture has exceeded 200,000 tons. Although there are a large number of sea cages in my country, due to relatively backward cage facilities and breeding technology, low yields, long breeding cycles, high feed coefficients, and poor resistance to wind and waves, cage breeding can only be concentrated in Some inshore harbor waters suitable for the development of cage aquaculture. Since the 1970s in the world, the research on cages has been intensified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 江涛谌志新王中新谭文先梁建生徐正轨徐皓周彤
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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