CN106900606A - The double net wall hermetic type net cages of wind and wave resistance - Google Patents

Abstract

The present invention provides a kind of anti-wind and wave double net wall airtight net cage, which belongs to the field of aquaculture net cage. The anti wind wave double net wall airtight net cage includes a net cage frame, on which a culture net is hung, and the net cage The frame is evenly connected with connecting arms, the connecting arm is hung with an outer culture net and an inner culture net, the inner culture net is set inside the outer culture net, water supply equipment is installed on the cage frame, and the water supply equipment is equipped with a water pump. The suction pipe of the water pump extends into the seawater outside the net cage, the water outlet of the water pump is connected with a water inlet pipe, and the water inlet pipe extends into the net cage, and the water inlet pipe is provided with a water outlet. At an angle of 30 degrees, the bottom of the outer layer of the breeding net and the bottom of the inner layer of the breeding net are connected with a sewage collection device, which can effectively prevent the fish in the cage from being injured by the large wind and waves, and effectively avoid the damage of the cage in the strong wind and waves. powerful.

Description

Anti-wind and wave double wall closed cage

technical field

The invention provides an airtight net cage with anti-wind and wave double net walls, which belongs to the field of breeding net cages.

Background technique

It is used in the field of aquaculture, especially suitable for sea cage culture, or cage culture in large water bodies, such as reservoirs and lakes. It can be used to breed swimming fish with high economic value, such as Atlantic salmon, sea bream, grouper, grouper, rainbow trout and other species.

Sea cage culture is booming this year, and many national and provincial projects have vigorously promoted the development of sea cage culture, especially offshore cage culture, that is, to develop far from the shore, the water area is open, the water depth is deep, and the water body exchange Sufficient water area for cage culture of fish. Compared with nearshore waters, this type of water has stable water quality, large water capacity, and sufficient water exchange. It is not easy to cause the accumulation of residual bait and feces in the water and bottom during the breeding process, and can avoid water pollution. However, in this water body area, the wind and waves are relatively large, and the wind and waves occur more frequently, so the requirements for the anti-wind and wave performance of the breeding cages are relatively high.

Traditional anti-wind and wave cages are mostly single-net structure, that is, a single-layer net is hung around the frame of the cage. Once the single-layer net is damaged, it is very easy to cause the escape of farmed fish. It may cause biological invasion. In the long run, the consequences are difficult to estimate. At the same time, the escape of farmed fish will directly cause economic losses. The damage of the net clothing may also cause fish outside the cage to enter the cage, prey on the cultured objects, or give parasites and disease infectious diseases to the fish cultured in the cage, resulting in economic losses in the breeding process.

Traditional net cages are only equipped with a single-layer net, and the net material is mostly polyethylene (PE). After the net is suspended in the water body, the shape of the net is not easy to maintain. The area of the enclosed area changes drastically, which affects the activities of the breeding objects, such as squeezing the breeding area, causing crowding of fish, causing external injuries, and even death. Or the nets around and at the bottom move upward under the promotion of the current, forcing fish to swim to the surface of the water body, which can easily cause fish to escape.

Traditional cages are hardly equipped with flow-making equipment. When in a reservoir or lake environment, there is no large wind and waves, the water body fluctuates little, and the water body exchange capacity is poor. If a large cage is placed in such an environment, the active exchange capacity between the water body in the cage and the outside water body is poor. The respiration of a large number of cultured fish can easily cause low dissolved oxygen in the water body in the cage, resulting in the lack of oxygen in the water body. At the same time, after feeding feed to farmed fish, residual bait and feces are easy to accumulate in the bottom of the water body under the net, resulting in eutrophication of the bottom, thus affecting the overall water environment.

Contents of the invention

The purpose of the present invention is to provide a closed net cage with double net walls against wind and waves, which can effectively avoid the injury of fish in the cage caused by large wind and waves, effectively avoid the damage of the cage in strong wind and waves, and has strong water exchange capacity.

The anti-wind and wave double-net wall airtight net cage of the present invention comprises a net cage frame, on which a culture net is hung, on which a connecting arm is uniformly connected, on which an outer culture net and an inner layer are suspended The aquaculture net, the inner aquaculture net is set in the outer aquaculture net, the water supply equipment is installed on the cage frame, the water supply equipment is equipped with a water pump, the suction pipe of the water pump extends into the seawater outside the net cage, and the water outlet of the water pump The water inlet pipe is connected to the net cage, and the water inlet pipe is provided with a water outlet. The water outlet and the tangent line of the net cage frame at the corresponding position are at an angle of 30 degrees. The bottom of the outer breeding net and the inner breeding net is connected with a sewage collection device .

In the wind and wave-resistant double-walled airtight net cage, the inner breeding net is made of high-density polyethylene netting.

In the wind and wave-resistant double-net-walled airtight net cage, the outer culture net is a canvas net.

In the wind and wave-resistant double-wall sealed net cage, an oxygen supply unit is arranged on the net cage. The oxygen supply unit includes an oxygen supply machine. The oxygen outlet of the oxygen supply machine is connected to the water inlet pipe. The oxygen supply unit and the water supply equipment form a water supply supply. oxygen unit.

Compared with the prior art, the present invention has beneficial effects as follows:

In the anti-wind and wave double-walled airtight cage, the outer layer of the breeding net uses hard canvas as the material, and the outer layer of canvas-type netting is heavy, and after being immersed in water, the posture is stable, and it is not easily deformed under the action of water flow. Also provides additional protection for the inner layer of farming nets that are suspended from the inner layer. At the same time, the inside and outside of the net cage are isolated, first, to prevent the fish cultured in the net cage from escaping into the natural water body. Second, prevent fish outside the cage from carrying pathogens such as parasites into the cage and infect the farmed fish, and at the same time prevent external fish from entering the cage to prey on the farmed fish. The water supply and oxygen supply unit is installed in multiple places on the cage frame. Since there are multiple water outlets on it and they are located at different water depths, the water outlets are at an angle of 30 degrees to the tangent line. The sprayed water can create a rotating water flow in the cage. At the same time, the water outside the cage is pumped into the cage, which enhances the water exchange capacity, and makes the water flow in the cage evenly and gradually distributed from the edge of the cage to the center of the cage, which is suitable for the fish to swim in an environment with a suitable flow rate. At the same time, the rotating water flow can push the residual bait and feces produced in the breeding process to the sewage collection tank at the bottom of the center of the net cage for collection. This water flow pattern also facilitates the even distribution of dissolved oxygen in the interior area of the cage. Uniform flow rate changes and dissolved oxygen distribution are conducive to the growth of cultured fish, and at the same time can increase the culture density per unit water body and increase the overall output.

Description of drawings

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

Fig. 2 is a top view of the present invention;

Fig. 3 is a sectional view of the cage frame of the present invention.

In the figure: 1. Pumping pipe; 2. Outer breeding net; 3. Sewage collection device; 4. Cage frame; 5. Connecting arm; 6. Inlet pipe; 7. Installation pipe; 8. Inner breeding net; 9 1. Lifting water pump; 10. Oxygen supply unit.

detailed description

Below in conjunction with the present invention, the embodiment of the present invention will be further described:

As shown in Fig. 1, Fig. 2 and Fig. 3, anti-wind wave double network wall airtight net cage of the present invention comprises net cage frame 4, and net cage frame 4 floats on the water surface, is suspended on the net cage frame 4 Aquaculture net, the cage frame 4 is evenly connected with connecting arm 5, and two installation pipes 7 are hung on the connection arm 5, and the outer layer aquaculture net 2 and the inner layer aquaculture net 8 are respectively hung on the two installation pipes 7, and the inner layer aquaculture net 8 is hung on the two installation pipes 7 respectively. Net 8 is enclosed within the outer layer breeding net 2, and water supply equipment is installed on the net cage frame 4, and water supply equipment is provided with lift pump 9, and the suction pipe 1 of lift pump 9 stretches in the seawater outside the net cage, and the outlet of water lift pump 9 Water inlet is connected with water inlet pipe 6, and water inlet pipe 6 stretches in the net cage, and water inlet pipe 6 is provided with water outlet, and the net cage frame 4 tangent lines of water outlet and corresponding position are 30 degree angles, and outer layer culture net 2 and inner layer culture net The bottom of 8 is connected with the sewage collecting device 3.

In the wind and wave-resistant double-walled closed net cage, the inner culture net 8 is a high-density polyethylene netting.

In the wind and wave-resistant double-walled closed cage, the outer culture net 2 is a canvas net.

In the wind and wave-resistant double-net wall airtight cage, the outer culture net 2 is a canvas net made of high-density composite material, and the inner culture net 8 is a high-density polyethylene net. Canvas-style nets do not have a mesh structure and are composed of a whole piece of canvas with poor water permeability. The surface is coated with existing biological anti-fouling materials, which are non-toxic and prevent non-destructive organisms such as algae from entering the net. attached growth. Inner hanging polyethylene netting. The outer layer of canvas netting is heavy, and after being immersed in water, it has a stable posture and is not easily deformed under the action of water flow. It also provides additional protection for the polyethylene netting suspended on the inner layer, avoiding squeezing the fish activity space and causing fish damage. Collision damage between classes. At the same time, the inside and outside of the net cage are isolated. First, the fishes cultured in the net cage escape into the natural water body. Second, prevent the fish outside the cage from carrying pathogens such as parasites into the cage and infect the farmed fish, and at the same time prevent external fish from entering the cage to prey on the farmed fish.

Described anti-wind and wave double network wall airtight net cage, oxygen supply unit 10 is arranged on the net cage, and oxygen supply unit 10 comprises oxygen supply machine, and the oxygen outlet of oxygen supply machine is connected to water inlet pipe 6, and oxygen supply unit 10 is connected with water supply The equipment constitutes a water and oxygen supply unit 10 .

In the wind and wave-resistant double-walled airtight net cage, a plurality of water supply units are integrated on the net cage frame 4 . The net box of the present invention adopts the frame of the high-density base vinyl material that the cross section of wrapping stainless steel is rectangular, and devices such as water pumps and water pipes can be installed thereon. The net cage is provided with a suction pipe 1, which extends vertically 10m below the water surface, and is used to draw seawater into the interior of the net cage. A water pump 9 is installed on the frame to extract seawater through the suction pipe 1 outside the net cage. Water pipe 6, water inlet pipe 6 is positioned at net cage inside, is used for external sea water is injected into net cage inside, and water inlet pipe 6 is close to net clothing, and vertically is installed in net cage inside, and arranges five water outlets evenly on vertical direction. Connect the oxygenation device at No. 6 of the water inlet pipe, directly input the oxygen into the No. 6 water inlet pipe, and discharge it into the inside of the net cage with the water flow to oxygenate the inside of it. The water pump 9 cooperates with the suction pipe 1 and the water inlet pipe 6 and an oxygenation device to form a water supply and oxygen supply unit 10. On the net cage, three or four of these units are evenly arranged, and the net cage with a larger diameter, such as a diameter of 24m , arrange four sets of water supply and oxygen supply units 10, and arrange three sets of water supply and oxygen supply units 10 for smaller net cages, such as a diameter of 18m. The water inlet direction of the water outlet in all water supply and oxygen supply units 10 requires an angle of 30° along the tangent direction of the frame at the position, and water inlet in clockwise or counterclockwise direction (see figure). In this way, a rotating water flow is formed inside the cage, so that the water velocity in the cage is evenly distributed from the edge of the cage to the center of the cage, and the fish suitable for breeding can swim in an environment with a suitable flow rate, and at the same time, the water produced during the breeding process can be reduced. The residual bait and feces are pushed to the sewage collection tank at the bottom of the center of the cage for collection. This water flow pattern also facilitates the even distribution of dissolved oxygen in the interior area of the cage. Uniform flow rate changes and dissolved oxygen distribution are conducive to the growth of cultured fish, and at the same time can increase the culture density per unit water body and increase the overall output.

Claims (4)

1. a kind of double net wall hermetic type net cages of wind and wave resistance, including net cage frame, hang with culturing net on net cage frame, its feature exists In, linking arm uniformly is connected with net cage frame, linking arm is hung oneself outer layer culturing net and internal layer culturing net, internal layer cultivation net In supply equipment in outer layer culturing net, is provided with net cage frame, supply equipment is provided with lift pump, and the drinking-water pipe of lift pump is stretched into In seawater outside net cage, the delivery port of lift pump is connected with water inlet pipe, and water inlet pipe is stretched into net cage, and water inlet pipe is provided with delivery port, Delivery port is in 30 degree of angles with the net cage frame tangent line of its relevant position, and outer layer culturing net and internal layer cultivation sieve bottom are connected with dirt collection Device.

2. double net wall hermetic type net cages of wind and wave resistance according to claim 1, it is characterised in that internal layer culturing net is high density Polyethylene etting.

3. double net wall hermetic type net cages of wind and wave resistance according to claim 2, it is characterised in that outer layer culturing net is canvas type Etting.

4. double net wall hermetic type net cages of wind and wave resistance according to claim 3, it is characterised in that oxygen supply list is set on net cage Unit, oxygen supply unit includes aerator, and the oxygen exhaust of aerator is connected to water inlet pipe, and oxygen supply unit supplies water with supply equipment composition and supplies Oxygen unit.