An apparatus for hatching fish eggs
By using a double-layer structure of broodstock cages and hatching cages, along with the design of separation, barrier, and aeration components, the problems of broodstock agitation affecting egg fertilization rate and stacking leading to oxygen deficiency were solved, thus achieving efficient egg hatching and fry cultivation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 云南省渔业科学研究院
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-24
AI Technical Summary
In traditional incubation methods, the stirring of the parent fish affects the fertilization rate of the fish eggs, the stacking of fish eggs leads to oxygen deficiency, resulting in a low hatching rate, and the fish eggs and fry are not separated in their environment, which affects the survival rate.
The system employs a double-layer structure consisting of a broodstock cage and a hatching cage. The separation component isolates the fish eggs and broodstock, the barrier component prevents the fry from swimming upstream, the aeration component increases oxygen, and the overflow hole prevents the drain pipe from clogging, thus providing a suitable hatching environment.
It improves the hatching and survival rates of fish eggs, prevents parent fish from eating the eggs, expands the activity range of fry, facilitates cleaning and management, reduces fry transfer, and improves fry survival rate.
Smart Images
Figure CN224539148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fish egg incubation technology, and in particular to a fish egg incubation device. Background Technology
[0002] The Cobitidae family is a small group of individuals within the Cypriniformes order. They are benthic, widely distributed, and exhibit strong species differentiation. Over 100 species have been discovered in my country. The genus *Cobitia* is mainly distributed in the Qinghai-Tibet Plateau and surrounding areas, with 125 species identified so far. The genus *Cobitia* is mainly distributed in southern China, South Asia, and Southeast Asia. This genus represents the most highly differentiated group within the Cobitidae family, with over 200 species, encompassing more than half of the fish species in the family. Stocking and release activities are frequently conducted, with many species of *Cobitia* being included in these releases. Furthermore, these fish species have a good local consumer market. Therefore, to obtain a sufficient number of fry, improving the hatching rate of fertilized eggs has become a key aspect of aquaculture technology. In traditional incubation methods, induced female and male fish are placed directly into an incubation tank to lay eggs on their own. After laying, they are removed. During this process, since the females do not lay eggs at the same time and the parent fish are not isolated, the eggs laid earlier are disturbed by the parent fish, which affects their fertilization rate and reduces the hatching rate. In addition, the eggs usually pile up at the bottom of the incubation tank due to water flow, which can easily cause oxygen deficiency and result in a low survival rate after hatching. Utility Model Content
[0003] The purpose of this invention is to provide a fish egg incubation device. Through the double-layer structure of the parent fish net box and the incubation net box, the parent fish are prevented from swallowing the fertilized eggs. The separation component ensures that the fish eggs and the hatched fry are in a safe environment and provides a suitable incubation environment for the fish eggs and a suitable growth environment for the fry.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A fish egg hatching device includes a barrel body with a detachable fixing component inside. A parent fish net box is installed on the fixing component. The parent fish net box is open at both the top and bottom. The lower end of the parent fish net box is connected to a hatching net box. A separation component for fish eggs to pass through is provided between the parent fish net box and the hatching net box. One side of the hatching net box has an openable door, and the other side of the hatching net box has a barrier component for fish fry to pass through. An aeration component is provided at the bottom of the barrel body. A water inlet pipe is provided at one end of the barrel body near the opening, and a drain pipe is provided at one end of the barrel body near the bottom. The water inlet pipe and the drain pipe are respectively located on opposite sides of the left and right sides of the barrel body. A filter screen is provided inside the drain pipe.
[0005] By adopting the above technical solution, the separate design of the parent fish cage and the hatching cage enables zoned management of spawning and hatching, avoiding interference from parent fish with the hatching of fish eggs. The separation component is used to allow fish eggs to pass through while blocking parent fish, and the blocking component and the cage door are used to allow fish fry to swim away from the hatching cage on their own. It also has aeration and water exchange functions.
[0006] A further feature of this invention is that the fixing assembly includes an annular frame, a crossbar, uprights, and a bottom frame. The annular frame is located at the upper end of the barrel. There are two crossbars oriented left and right, and both ends of the crossbars are connected to the annular frame. There are four uprights vertically connected to the lower side of the crossbars. The parent fish cage and the hatching cage are detachably connected to the uprights. The bottom frame is connected to the lower end of the uprights.
[0007] A further feature of this invention is that the separation component is a bottom plate with an inverted V-shaped cross-section. The bottom plate has multiple plates that are equidistantly distributed from left to right at the bottom of the parent fish cage. All bottom plates are connected to the parent fish cage, and a channel that is wider at the top and narrower at the bottom is formed between two adjacent bottom plates, allowing fish eggs to pass through.
[0008] By adopting the above technical solution, fish eggs enter the hatching cage through the channel, and the bottom plate can prevent fish fry from swimming upstream into the parent fish cage.
[0009] A further feature of this invention is that the barrier component is a side plate with a V-shaped cross-section. The side plate has multiple side plates that are equidistantly distributed from top to bottom on the front side of the hatching net box. The side plates are all connected to the hatching net box, and a passageway with a larger inner side and a smaller outer side is formed between two adjacent side plates, allowing fish fry to pass through.
[0010] By adopting the above technical solution, fish fry can swim out of the hatching cage through the passageway, preventing them from swimming back into the hatching cage and reducing the transfer of fish fry.
[0011] A further feature of this invention is that the aeration assembly includes an annular nanotube, a connecting pipe, and an air compressor. The annular nanotube is located at the bottom of the barrel body, and the air compressor is located on the outside of the barrel body. One end of the connecting pipe is connected to the annular nanotube, and the other end of the connecting pipe passes through the barrel body and is connected to the air compressor.
[0012] By adopting the above technical solution, the bottom aeration facility uses ring-shaped nanotubes instead of the air stones used in the past to prevent the large airflow from disturbing the fish fry.
[0013] A further feature of this invention is that a plurality of overflow holes are provided on the side of the barrel where the drain pipe is located, the overflow holes being located above the drain pipe and the position of the overflow holes being higher than the position of the inlet pipe.
[0014] By adopting the above technical solution, an overflow hole is set above the drain pipe to prevent water from overflowing due to blockage of the drain pipe.
[0015] In summary, this utility model has the following beneficial effects: Firstly, this utility model adopts a double-layer structure of parent fish net cage and hatching net cage, which ensures the activity space of parent fish and the hatching environment of fish eggs. The separation component can separate parent fish and fish eggs and prevent the fish fry in the lower layer from swimming upstream, effectively preventing parent fish from eating fish eggs, while avoiding the loss of fish eggs, avoiding the problem of fish eggs piling up and gathering, and improving the hatching survival rate.
[0016] Secondly, the fixing component in this utility model can drive the parent fish net cage and hatching net cage to be detached from the barrel, which is convenient for cleaning. At the same time, it increases the space inside the barrel, expands the range of fish fry activity, and can be used as a fish fry rearing barrel, avoiding the transfer of fish fry, improving the survival rate of fish fry, and making it easy to remove necrotic egg membranes, thus avoiding pollution of water bodies.
[0017] Thirdly, this utility model uses ring-shaped nanotubes to oxygenate the water, preventing large airflows from disturbing the fish fry. The overflow hole can prevent the drain pipe from becoming blocked and causing water to overflow, thus preventing a large number of fish fry from escaping. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a side sectional view of the present invention; Figure 4 This is a top sectional view of the present invention; In the diagram: 1. Barrel body; 2. Fixing components; 201. Circular frame; 202. Crossbar; 203. Upright pole; 204. Base frame; 3. Parent fish cage; 4. Hatching cage; 401. Door; 5. Separation components; 501. Bottom plate; 6. Barrier components; 601. Side plate; 7. Aeration components; 701. Circular nanotubes; 702. Connecting pipe; 703. Air compressor; 8. Inlet pipe; 9. Drain pipe; 10. Filter screen; 11. Overflow hole. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.
[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] Examples, such as Figures 1 to 4 As shown, a fish egg incubation device includes a barrel 1, which is large enough to be used as a fish fry rearing tank. A detachable fixing component 2 is installed inside the barrel, and a parent fish net cage 3 is mounted on the fixing component 2 to provide an activity area for the parent fish. The parent fish net cage 3 is open at both the top and bottom. The lower end of the parent fish net cage 3 is connected to an incubation net cage 4, which is used for incubating fish eggs and the growth of fish fry. A separation component 5 is provided between the parent fish net cage 3 and the incubation net cage 4 to allow the fish eggs to pass through, isolating the parent fish. An openable door 401 is provided on one side of the incubation net cage 4. The door has two layers; the lower layer can slide upwards to fit against the upper layer. After the fish eggs have fully incubated, the fish fry inside the net cage are transferred outside the incubation net cage 4. Inside the barrel 1, on the other side of the hatching net cage 4, there is a barrier component 6 to allow the fry to pass through. At the bottom of the barrel 1, there is an aeration component 7 to increase the oxygen content of the water. At one end of the barrel 1 near the opening, there is a water inlet pipe 8, and at one end of the barrel 1 near the bottom, there is a drain pipe 9. The water inlet pipe 8 and the drain pipe 9 are respectively located on the left and right opposite sides of the barrel 1 to form water flow. The drain pipe 9 is equipped with a filter screen 10 to prevent the fry from being washed away. The separate design of the parent fish net cage 3 and the hatching net cage 4 realizes the separate management of spawning and hatching, and avoids the parent fish from interfering with the hatching of the fish eggs. The separation component 5 is used to allow the fish eggs to pass through and to block the parent fish. The barrier component 6 and the box door are used to allow the fry to swim away from the hatching net cage 4 on their own, and have aeration and water exchange functions.
[0024] The fixing component 2 includes an annular frame 201, a crossbar 202, an upright 203, and a bottom frame 204. The annular frame 201 is located at the upper end of the barrel 1. There are two crossbars 202, which are oriented left and right. Both ends of the crossbars 202 are connected to the annular frame 201. There are four uprights 203, which are vertically connected to the lower side of the crossbars 202. The parent fish net cage 3 and the hatching net cage 4 are detachably connected to the uprights 203. The bottom frame 204 is connected to the lower end of the uprights 203.
[0025] The separation component 5 is a bottom plate 501 with an inverted V-shaped cross-section. Multiple bottom plates 501 are provided and are distributed equidistantly from left to right at the bottom of the parent fish net cage 3. The bottom plates 501 are all connected to the parent fish net cage 3. A channel with a larger top and a smaller bottom is formed between two adjacent bottom plates 501. The channel allows fish eggs to pass through and enter the hatching net cage 4 through the channel. The bottom plate 501 can prevent fish fry from swimming upstream into the parent fish net cage 3.
[0026] The barrier component 6 is a V-shaped side plate 601. Multiple side plates 601 are provided and are evenly distributed from top to bottom on the front side of the hatching net box 4. All side plates 601 are connected to the hatching net box 4. A passage with a larger inner diameter and a smaller outer diameter is formed between two adjacent side plates 601. The passage allows the fish fry to pass through and swim out of the hatching net box 4, preventing the fish fry from swimming back to the hatching net box 4 and reducing the transfer of fish fry.
[0027] The aeration component 7 includes annular nanotubes 701, connecting pipes 702, and air compressors 703. The annular nanotubes 701 are located at the bottom of the tank body 1, and the air compressors 703 are located on the outside of the tank body 1. One end of the connecting pipes 702 is connected to the annular nanotubes 701, and the other end of the connecting pipes 702 passes through the tank body 1 and is connected to the air compressors 703. The annular nanotubes 701 are used to oxygenate the water and prevent the large airflow from disturbing the fish fry.
[0028] The barrel 1 has multiple overflow holes 11 on one side where the drain pipe 9 is located. The overflow holes 11 are located above the drain pipe 9 and are higher than the water inlet pipe 8. The overflow holes 11 can prevent the drain pipe 9 from being blocked and causing water to overflow, thus preventing a large number of fish fry from escaping.
[0029] Instructions for use: Place the parent fish into the parent fish net cage 3 from the top. The fish eggs will fall through the bottom plate 501 into the hatching net cage 4. The hatching net cage 4 provides a suitable environment for the fish eggs to hatch. The hatched fry are prevented from swimming upstream to the parent fish net cage 3 due to the obstruction of the bottom plate 501. The fry grow in the hatching net cage 4 or swim out of the hatching net cage 4 through the side plate 601. After the fish eggs have been laid, the parent fish can be transferred in the parent fish net cage 3. After the fish eggs have hatched, the fry that have not swum out of the side plate 601 can be swum to the barrel 1 after the box door 401 is opened. By pulling the crossbar 202, the fixing component 2, the parent fish net cage 3 and the hatching net cage 4 are brought out of the barrel 1, so that the barrel 1 becomes a breeding barrel for raising fish fry.
[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A fish egg incubation device, comprising a barrel (1), characterized in that: The barrel is equipped with a detachable fixing component (2), on which a parent fish net box (3) is installed. The parent fish net box (3) is open at both the top and bottom. The lower end of the parent fish net box (3) is connected to a hatching net box (4). A separation component (5) for fish eggs to pass through is provided between the parent fish net box (3) and the hatching net box (4). One side of the hatching net box (4) is provided with an openable door (401). The other side of the hatching net box (4) is provided with a barrier component (6) for fish fry to pass through. An aeration component (7) is provided at the bottom of the barrel body (1). A water inlet pipe (8) is provided at one end of the barrel body (1) near the opening. A drain pipe (9) is provided at one end of the barrel body (1) near the bottom. The water inlet pipe (8) and the drain pipe (9) are respectively located on the left and right opposite sides of the barrel body (1). A filter screen (10) is provided inside the drain pipe (9).
2. The fish egg incubation device according to claim 1, characterized in that: The fixing component (2) includes an annular frame (201), a crossbar (202), a vertical pole (203), and a bottom frame (204). The annular frame (201) is located at the upper end of the barrel (1). There are two crossbars (202) facing left and right. Both ends of the crossbars (202) are connected to the annular frame (201). There are four vertical poles (203) connected vertically to the lower side of the crossbars (202). The parent fish cage (3) and the hatching cage (4) are detachably connected to the vertical poles (203). The bottom frame (204) is connected to the lower end of the vertical poles (203).
3. The fish egg incubation device according to claim 2, characterized in that: The separation component (5) is a bottom plate (501) with an inverted V-shaped cross-section. The bottom plate (501) has multiple plates that are equidistantly distributed from left to right at the bottom of the parent fish net cage (3). The bottom plates (501) are all connected to the parent fish net cage (3). A channel with a larger top and a smaller bottom is formed between two adjacent bottom plates (501), and the channel allows fish eggs to pass through.
4. The fish egg incubation device according to claim 3, characterized in that: The barrier component (6) is a V-shaped side plate (601). The side plate (601) is provided in multiple ways and is distributed at equal intervals from top to bottom on the front side of the hatching net box (4). The side plates (601) are all connected to the hatching net box (4). A passage with a larger inner side and a smaller outer side is formed between two adjacent side plates (601), and the passage allows the fish fry to pass through.
5. The fish egg incubation device according to claim 4, characterized in that: The aeration assembly (7) includes an annular nanotube (701), a connecting pipe (702), and an air compressor (703). The annular nanotube (701) is located at the bottom of the barrel (1), and the air compressor (703) is located on the outside of the barrel (1). One end of the connecting pipe (702) is connected to the annular nanotube (701), and the other end of the connecting pipe (702) passes through the barrel (1) and is connected to the air compressor (703).
6. The fish egg incubation device according to claim 5, characterized in that: The barrel (1) has multiple overflow holes (11) on one side where the drain pipe (9) is located. The overflow holes (11) are located above the drain pipe (9) and are higher than the water inlet pipe (8).