Net cage suitable for culturing fishes in riverway

Abstract

The net cage comprises an aquaculture net cage body, a bag-shaped dense net used for containing feed is arranged on the inner side of an opening in the top of the aquaculture net cage body, the dense net is connected with the edge of the opening in the top of the aquaculture net cage body through a detachable connecting structure, and an aquaculture space is formed between the outer side of the dense net and the inner side of the aquaculture net cage body; the outer side of the dense net is provided with an aeration device, and the bottom of the dense net is connected with a counterweight structure. According to the net cage suitable for culturing fishes in the river channel, the dense net is convenient to disassemble, clean and install, and feed waste and water pollution caused by the fact that puffed compound feed floats out of the net cage due to flowing of river water are prevented.

Description

Technical Field

[0001] The utility model relates to the field of cage culture, in particular to a cage suitable for river fish culture. Background Art

[0002] Since river fish farming has the advantages of low investment, labor saving, quick results, high returns, and concentrated commercial fish, it has been developed rapidly in recent years, and the fish farming area has increased year by year. Building cages in rivers is a common farming method. In order to ensure good water permeability and dissolved oxygen in the cages, the cages generally have larger apertures. When feeding expanded compound feed, the river water will push the feed out of the cages, increasing the farming cost and polluting the water body. At present, the common practice on the market is to add a plastic feeding circle or fix a high-density mesh outside the cage to prevent the feed from floating away, but some feed still floats to the middle of the two layers of mesh when the fish scramble for food, resulting in waste and water damage. In addition, due to the complex river environment, this fixed layer of dense net needs to be cleaned regularly to maintain good water permeability and dissolved oxygen. The fixing and disassembly methods are complicated, time-consuming and labor-intensive. Utility Model Content

[0003] The utility model aims to provide a net cage suitable for fish culture in rivers, which is convenient for disassembly, cleaning and installation of the dense net and prevents the expanded compound feed from floating out of the net cage due to the flow of river water, causing feed waste and water pollution.

[0004] To achieve the above-mentioned purpose, the utility model provides a net cage suitable for breeding fish in rivers, including a breeding net cage, wherein a pocket-shaped dense net for placing feed is provided on the inner side of the top opening of the breeding net cage, the dense net is connected to the edge of the top opening of the breeding net cage by a detachable connecting structure, and a breeding space is formed between the outer side of the dense net and the inner side of the breeding net cage; an aeration device is provided on the outer side of the dense net, and a counterweight structure is connected to the bottom of the dense net.

[0005] As a further improvement of the utility model, the counterweight structure includes a plurality of lead sinkers, which are connected to the bottom of the dense net through hanging rings.

[0006] As a further improvement of the utility model, the aeration device includes a first aeration coil located at the bottom of the dense mesh, and also includes a second aeration coil surrounding the outer side wall of the dense mesh, and the first aeration coil and the second aeration coil are both connected to the dense mesh.

[0007] As a further improvement of the utility model, the aeration device also includes an air pump, the output end of the air pump is connected to the first aeration coil through the first air pipe, and the first aeration coil is connected to the second aeration coil through the second air pipe.

[0008] As a further improvement of the utility model, the detachable connection structure includes an annular frame arranged at the edge of the opening of the breeding cage, a tube body is provided on the top of the annular frame, and also includes a plurality of U-shaped hooks arranged at the edge of the dense net, and the U-shaped hooks are hooked on the tube body.

[0009] As a further improvement of the utility model, a bolt is passed through the U-shaped hook, the bolt passes through the side wall of the annular frame, and a nut is threadedly connected to the bolt.

[0010] As a further improvement of the present invention, a float is provided on the outer side of the upper part of the aquaculture cage.

[0011] Beneficial Effects

[0012] Compared with the prior art, the advantages of the net cage of the utility model suitable for river fish farming are:

[0013] 1. By adding a dense net inside the breeding cage, and the dense net is connected with a detachable connection structure, it is convenient to disassemble, clean and install, and can effectively prevent the expanded compound feed from floating out of the breeding cage due to the flow of river water and causing feed waste and water pollution.

[0014] 2. The detachable connection structure adopts the method of hooking the U-shaped hook on the pipe body, which has a simple structure and low production cost. The U-shaped hook and the side wall of the ring frame are penetrated by bolts. Even if the dense net fluctuates up and down with the water surface, the U-shaped hook will not be separated from the ring frame, ensuring that the dense net can be stably fixed on the breeding cage.

[0015] 3. By setting aeration coils on the dense net, good dissolved oxygen is ensured in the water body enclosed by the dense net, thereby achieving the purpose of not affecting the growth of farmed fish.

[0016] 4. Connecting a counterweight structure at the bottom of the dense net can ensure that the dense net has good falling properties in the water.

[0017] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a cross-sectional view of a cage suitable for river fish farming;

[0020] Figure 2This is the installation diagram of the dense net and aeration device;

[0021] Figure 3 is an enlarged view of the detachable connection structure;

[0022] Figure 4 This is an enlarged view of the aeration coil. DETAILED DESCRIPTION

[0023] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] Example

[0025] The specific implementation of the utility model is as follows Figures 1 to 4 As shown, a cage suitable for breeding fish in a river includes a breeding cage 1, and a pocket-shaped dense net 3 for placing feed is provided on the inner side of the top opening of the breeding cage 1. The dense net 3 is connected to the edge of the top opening of the breeding cage 1 through a detachable connection structure, and the outer side of the dense net 3 and the inner side of the breeding cage 1 form a breeding space for fish. An aeration device 8 is provided on the outer side of the dense net 3, and a counterweight structure is connected to the bottom of the dense net 3. The aperture of the breeding cage 1 is large to ensure good water permeability and dissolved oxygen in the cage, and the dense net can prevent the expanded compound feed from drifting away due to the water flow in the river.

[0026] In this embodiment, the counterweight structure includes a plurality of lead sinkers 6, which are connected to the bottom of the dense net 3 through a hanging ring 61, and the hanging ring 61 is connected between the lead sinkers 6 and the dense net 3. A lead sinker 6 is installed under the dense net 3 at intervals of 1-2 meters, which enables the dense net to have a good falling ability in the water body even if algae are attached, thereby preventing the expanded compound feed from drifting away.

[0027] The aeration device 8 includes a first aeration coil 81 located at the bottom of the dense net 3, and also includes a second aeration coil 82 surrounding the outer wall of the dense net 3, and the first aeration coil 81 and the second aeration coil 82 are both connected to the dense net 3. The aeration device 8 also includes an air pump 85, and the output end of the air pump 85 is connected to the first aeration coil 81 through a first air pipe 84, and the first aeration coil 81 is connected to the second aeration coil 82 through a second air pipe 83. When the air pump 85 is working, gas is transported to the first aeration coil 81 and the second aeration coil 82 through the first air pipe 84, and the gas is ejected from the aeration holes on the wall of the aeration coil, ensuring good dissolved oxygen in the part of the water body surrounded by the dense net 3, thereby achieving the purpose of not affecting the growth of farmed fish.

[0028] The detachable connection structure includes an annular frame 2 arranged at the edge of the opening of the breeding net box 1, a tube body 21 is arranged on the top of the annular frame 2, and also includes a plurality of U-shaped hooks 4 arranged at the edge of the dense net 3, and the U-shaped hooks 4 are hooked on the tube body 21. A plurality of bolts 5 are passed through the U-shaped hooks 4, each bolt 5 also passes through the side wall of the annular frame 2, and a nut is threadedly connected to the bolt 5. The nuts and the bolt heads of the bolts 5 clamp the two ends of the U-shaped hook 4 in the middle. A U-shaped hook 4 is installed at intervals of 1-2 meters at the upper end of the dense net.

[0029] When the dense net 3 needs to be cleaned, the personnel first remove the bolt 5 at one side of the breeding net box 1, and then lift the U-shaped hook 4 from the pipe body 21 to retract the dense net 3.

[0030] A floating body 7 is provided on the outer side of the upper part of the aquaculture cage 1 so that the top opening of the aquaculture cage 1 is located above the water surface.

[0031] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A cage suitable for aquaculture of fish in rivers, comprising a cage (1), characterized in that: A pocket-shaped dense net (3) for placing feed is provided on the inner side of the top opening of the breeding net box (1); the dense net (3) is connected to the edge of the top opening of the breeding net box (1) via a detachable connection structure; a breeding space is formed between the outer side of the dense net (3) and the inner side of the breeding net box (1); an aeration device (8) is provided on the outer side of the dense net (3); and a counterweight structure is connected to the bottom of the dense net (3).

2. A net cage suitable for river fish farming according to claim 1, characterized in that: The counterweight structure comprises a plurality of lead sinkers (6), and the lead sinkers (6) are connected to the bottom of the dense net (3) through hanging rings (61).

3. A net cage suitable for river fish farming according to claim 1 or 2, characterized in that: The aeration device (8) comprises a first aeration coil (81) located at the bottom of the dense mesh (3), and also comprises a second aeration coil (82) surrounding the outer wall of the dense mesh (3), and both the first aeration coil (81) and the second aeration coil (82) are connected to the dense mesh (3).

4. A net cage suitable for river fish farming according to claim 3, characterized in that: The aeration device (8) further comprises an air pump (85), the output end of the air pump (85) being connected to the first aeration coil (81) via a first air delivery pipe (84), and the first aeration coil (81) being connected to the second aeration coil (82) via a second air delivery pipe (83).

5. A net cage suitable for river fish farming according to claim 1, characterized in that: The detachable connection structure comprises an annular frame (2) arranged at the edge of the opening of the breeding cage (1), a tube body (21) is arranged on the top of the annular frame (2), and also comprises a plurality of U-shaped hooks (4) arranged at the edge of the dense net (3), and the U-shaped hooks (4) are hooked on the tube body (21).

6. A net cage suitable for river fish farming according to claim 5, characterized in that: The U-shaped hook (4) is provided with a bolt (5), the bolt (5) passes through the side wall of the annular frame (2), and a nut is threadedly connected to the bolt (5).

7. A net cage suitable for river fish farming according to claim 1, characterized in that: A floating body (7) is provided on the outer side of the upper part of the aquaculture cage (1).

Images