CN103461241B - The multi-layer aquaculture net cage that a kind of safety is ecological - Google Patents

Abstract

The invention discloses the multi-layer aquaculture net cage that a kind of safety is ecological, it comprises internal layer net cage 1, middle level net cage 2 and outer net cage 3, internal layer net cage 1, middle level net cage 2 and outer net cage 3 are all for being fixed on the upper shed casing that the etting 5 on boxed frame 4 is formed by boxed frame 4 and edge, 1 is all connected by nylon rope between middle level net cage 2 with outer net cage 3 and between middle level net cage 2 with internal layer net cage, the upper surface of outer net cage 3 is provided with pedestrian's plate 6, the arranged beneath of pedestrian's plate 6 has buoyant device, is all furnished with bait table 8 in internal layer net cage 1 and middle level net cage 2.The invention has the beneficial effects as follows: add breed variety, significantly improve the economic benefit of cultivation; The aquaculture model of zones of different is more ecological, environmental protection; The present invention not only facilitates the management and maintenance work of staff, has again longer and characteristic that is not corrosion-vulnerable in service life.

Description

A kind of safe and ecological multi-layer culture net cage

technical field

The invention belongs to the field of aquaculture, and in particular relates to a net cage for aquaculture, in particular to a safe and ecological multi-layer culture net cage.

Background technique

According to historical records, about 800 years ago in our country, dense mesh cages were used to temporarily raise fish fry caught from rivers for about 15 to 30 days, waiting to be sold. This can be regarded as the prototype of cage culture, but the real Cage fish farming in the sense began in 1973. The purpose is to use the primary producers (phytoplankton) of the construction of the reservoir to set up cages to cultivate large-sized silver carp and bighead carp species over 13 cm in size, and then stock them in the reservoir. Improving the survival rate of fish species in the reservoir, this intensive farming model was quickly successful and quickly promoted. my country's cage culture started late, but it is an important way for the development of reservoirs, lakes, and large-scale farming.

Cage culture is to use bamboo, wood, metal mesh or synthetic fiber as net materials, and assemble it into an open box structure with a certain shape. The net part is completely submerged in the water and stretched out. Breeding fish or shrimp, and intensive feeding through high-density feeding, because of its considerable economic benefits, the current cage culture is becoming more and more prosperous. At present, although my country's cage technology has made great progress and the breeds are diversified, there are still some technical problems:

Chinese patent CN201595082U discloses a multi-layer three-dimensional breeding net cage, which includes a frame made of wooden boards and a net of box-type structure. The frame floats on the water surface through a float at the bottom, and the upper opening of the net is fixed on the frame. , there are sinkers fixed on the bottom edge of the net and on the edges around the net, so that the bottom of the net sinks and is opened as a whole. The net is provided with three layers, and the float is a foam with a density less than water or a sealed empty bucket. The device can allow different fish to live in the most suitable water layer, and can reduce the waste of fish food when feeding. It has the advantages of low environmental pollution, high survival rate of breeding, and strong resistance to natural disasters. Wooden boards are used to construct the buoyancy and support structure of the cage. This structure has a short service life and is susceptible to corrosion, which will pose a greater threat to the safety of the cage and staff;

Chinese patent CN201319807 discloses a fixed large net cage for aquaculture seawater fish. The piles of the cage are distributed along the surroundings, and the piles are covered with nets to form a box-like structure. In the lower program, the top of the pile is connected to the cable-stayed program II, the upper part of the pile is connected to the cable-stayed program I, and the top of the corresponding pile is connected through a transverse program. The utility model expands the culture volume of the net cage by driving piling columns on the seabed, increasing the upper and lower classes of the horizontal class, the cable-stayed class and the net clothes to fix the large net clothes. Although it expands the culture volume, because generally only one kind of fish can be cultured in a net cage, and the fish generally live in a fixed water layer, the increase of the height of the net cage has little significance for the change of the fish living space.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art, and provide a safe and ecological multi-layer culture net cage, which has high safety and significant economic and environmental benefits.

The purpose of the present invention is achieved through the following technical solutions: a multi-layer culture net cage of safety and ecology, which includes an inner net cage, a middle net cage and an outer net cage, the inner net cage, the middle net cage and the inner net cage. The outer cages are upper-opening boxes made of a box-shaped frame and nets whose edges are fixed on the box-shaped frame. Inside, between the middle cage and the outer cage and between the middle cage and the inner cage are connected by nylon ropes. The upper surface of the outer cage is provided with a pedestrian board, and a buoyancy device is arranged below the pedestrian board. Both the inner cage and the middle cage are equipped with bait tables.

The buoyancy device is a steel pipe with both ends sealed, and a plurality of steel pipes with both ends are evenly arranged under the pedestrian board. The pedestrian board is a reinforced concrete board, and an anti-skid mat is laid on the pedestrian board.

The netting is made of polyethylene material.

The interior of the inner net cage forms a high-quality breeding area, an economic breeding area is formed between the inner net cage and the middle net cage, and a mixed free-range breeding area is formed between the middle net cage and the outer net cage.

The nets are replaced with nets with different meshes according to individual changes from cultured fry to adult fish.

The length, width and height of the inner net cage are respectively 5～6m, 5～6m and 3～5m, and the length, width and height of the middle net cage are respectively 8～16m, 8～16m and 6～15m. The length, width and height of the outer net cages are 18-30m, 18-30m, and 8-20m respectively, and the distance between the three-layer net cages is ≥1.5m.

The present invention has the following advantages:

1. The present invention is mainly used for aquaculture in large lakes. It is provided with a three-layer box structure, which can selectively breed different types of fish in different box areas according to the type of fish, growth habits, economic benefits, etc., to overcome and solve the traditional The problem of not being able to increase the number of breeds caused by the device can significantly improve the economic benefits of farming;

2. Since the inner and outer net cages are equipped with bait tables, it is convenient for fish to eat, and the fish cultured in the outer net cage can swallow the excrement produced by the inner and middle fish, so it can not only reduce the waste of bait, Moreover, it has little pollution to the surrounding water quality, reduces the impact on the lake ecosystem, and is more ecological and environmentally friendly;

3. The frame structure of the net cage of the present invention adopts angle steel, channel steel, I-beam and steel pipe by welding, and the buoyancy device in the net cage area is a steel pipe with closed ends, and two parallel steel pipes with closed ends are used as connecting equipment At the same time, two parallel closed steel pipes are welded between the steel pipes to form a square frame structure of the same specification. The frame is filled with cement boards containing steel bars, and non-slip floor mats are laid on them, which is convenient for the management and maintenance of the staff. It also has the characteristics of long service life and low corrosion resistance.

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the figure, 1-inner cage, 2-middle cage, 3-outer cage, 4-box frame, 5-netting, 6-pedestrian board, 7-steel pipe, 8-bait table.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following description.

As shown in Figure 1, a kind of safe ecological multilayer culture net cage, it comprises inner layer net cage 1, middle layer net cage 2 and outer layer net cage 3, described inner layer net cage 1, middle layer net cage 2 and outer layer net cage The outer net cages 3 are upper opening boxes made of a box frame 4 and a net 5 whose edges are fixed on the box frame 4. The net clothes are made of polyethylene material, and the middle net cage 2 is arranged on the outer net cage 3. Inside, the inner layer net cage 1 is arranged on the inside of the middle layer net cage 2, between the middle layer net cage 2 and the outer layer net cage 3 and between the middle layer net cage 2 and the inner layer net cage 1 are all connected by nylon ropes, the outer layer The upper surface of net cage 2 is provided with pedestrian board 6, and the bottom of pedestrian board 6 is arranged with buoyancy device, and buoyancy device is the steel pipe 7 of both ends airtight, and the below of pedestrian board 6 is evenly arranged with a plurality of steel pipes 7 with both ends airtight, inside The bait platform 8 is all arranged in the layer net cage 1 and the middle layer net cage 2 . The interior of the inner layer cage 1 forms a high-quality breeding area, feeding and breeding. This area is a monoculture mode, mainly cultivating various rare or high economic value fish species, mainly including Dinggui, perch, catfish, river group, Qingbo, naked spot, etc., the size of the cage (length × width × height) is 6m×5m×3m; an economic breeding area is formed between the inner cage 1 and the middle cage 2, which is a mixed free-range breeding type, and a small amount of feeding Bait farming, the main fish species are grass carp, clear wave, silver carp, silver carp, Wuchang carp, etc. The size of the cage (length×width×height) is 16m×9m×10m; the middle cage 2 and the outer cage A mixed free-range breeding area is formed between the 3, no feeding is used for breeding, and the cultured fish species are silver carp, silver carp, crucian carp, Qingbo, etc. The size of the cage (length×width×height) is 25m×18m×14m, three layers The distance between cages is 2m.

Claims (2)

1. the multi-layer aquaculture net cage that a safety is ecological, it is characterized in that: it comprises internal layer net cage (1), middle level net cage (2) and outer net cage (3), described internal layer net cage (1), middle level net cage (2) and outer net cage (3) are all for being fixed on the upper shed casing that the etting (5) on boxed frame (4) is formed by boxed frame (4) and edge, described boxed frame (4) is by angle steel, channel-section steel, I-steel and pipe are by being welded, described etting (5) is polyethylene material, middle level net cage (2) is arranged at the inside of outer net cage (3), internal layer net cage (1) is arranged at the inside of middle level net cage (2), all be connected by nylon rope between middle level net cage (2) with outer net cage (3) and between middle level net cage (2) with internal layer net cage (1), the length of described internal layer net cage (1), wide, height is respectively 5 ~ 6m, 5 ~ 6m, 3 ~ 5m, the length of middle level net cage (2), wide, height is respectively 8 ~ 16m, 8 ~ 16m, 6 ~ 15m, the length of outer net cage (3), wide, height is respectively 18 ~ 30m, 18 ~ 30m, 8 ~ 20m, and spacing distance >=1.5m between three-layer network case, the inside of described internal layer net cage (1) forms fine work culture zone, economic culture zone is formed between internal layer net cage (1) and middle level net cage (2), formed to mix between middle level net cage (2) with outer net cage (3) and raise district scattered, the upper surface of outer net cage (3) is provided with pedestrian's plate (6), described pedestrian's plate (6) is reinforced concrete plate, the top of pedestrian's plate (6) is equipped with slipmat, the arranged beneath of pedestrian's plate (6) has buoyant device, described buoyant device is the airtight steel pipes (7) in two ends, the below of pedestrian's plate (6) is evenly arranged the airtight steel pipe in multiple two ends (7), bait table (8) is all furnished with in internal layer net cage (1) and middle level net cage (2).

2. the multi-layer aquaculture net cage that a kind of safety according to claim 1 is ecological, is characterized in that: described etting (5) changes the different etting of mesh according to cultivation fry to the individuality change of adult fish.