Fish egg hatching device and hatching method for acrossocheilus fasciatus

Abstract

The acrossocheilus fasciatus roe hatching device comprises a plurality of supports, a plurality of supporting plates are arranged on the supports, a plurality of hatching boxes are arranged on the supporting plates, hatching frames are arranged in the hatching boxes, screens are arranged on the lower portions of the hatching frames, and water outlet holes are formed in the side walls of the hatching boxes. A filter cover is installed in the incubator, the filter cover covers the water outlet hole, an overflow pipe is inserted into the water outlet hole, and the overflow pipe can rotate; the device further comprises a water supply pump and an oxygenation pump. The natural environment of acrossocheilus fasciatus roe hatching can be simulated, and therefore the hatching rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field, and more particularly to a device and method for hatching croaker eggs. Background Art

[0002] The smooth-lipped grouper, commonly known as freshwater grouper, is primarily found in Zhejiang, Anhui, Jiangxi, and Fujian provinces. It inhabits mountain streams and the rapids of the middle and upper reaches of rivers, with its breeding season typically occurring from May to July. Traditional artificial breeding of smooth-lipped grouper involves hatching eggs using conventional fish incubation methods, such as continuous aeration incubation in a bucket or continuous flow incubation. However, these methods generally have low hatchability rates. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a device and method for hatching fish eggs of smooth lipped fish.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention discloses a fish egg hatching device for smooth lipped fish, comprising a plurality of brackets, a plurality of support plates provided on the brackets, a plurality of hatching boxes provided on the support plates, a hatching frame provided in the hatching box, a screen provided at the lower part of the hatching frame, a water outlet hole provided on the side wall of the hatching box, a filter cover installed in the hatching box, the filter cover covering the water outlet hole, an overflow pipe inserted in the water outlet hole, and the overflow pipe being able to rotate; the present invention also comprises a water supply pump and an oxygenation pump, the outlet of the water supply pump is connected to a water supply main pipe, the side of the water supply main pipe is connected to a plurality of water supply branches, the water supply branches are connected to a plurality of water inlet pipes, the water inlet pipes are arranged corresponding to the hatching boxes, the oxygenation pump is connected to an air supply main pipe, the air supply main pipe is connected to a plurality of air supply branches, and the air supply branches are arranged corresponding to the positions of the hatching boxes.

[0006] Furthermore, a sealing sleeve is installed in the water outlet hole, and the overflow pipe is rotatably arranged in the sealing sleeve.

[0007] Furthermore, a drainage groove is connected to the support plate, and a drainage hole is opened in the middle of the drainage groove.

[0008] Furthermore, the outlet of the overflow pipe is located within the range of the drainage trough.

[0009] Furthermore, a downpipe is provided at the lower portion of the drainage trough, and the upper end of the downpipe is connected to the drainage hole.

[0010] Furthermore, the mesh size of the sieve is 18-30 meshes.

[0011] Furthermore, one end of the water supply branch pipe away from the water supply main pipe is connected to a sewage pipe.

[0012] Furthermore, the incubator is a rectangular parallelepiped of 575 mm × 390 mm × 250 mm; and the incubator frame is a rectangular parallelepiped of 540 mm × 380 mm × 50 mm.

[0013] A method for hatching fish eggs comprises the following steps:

[0014] The incubators are placed on the support plate in sequence, with the overflow pipe in a vertical position. Water is poured into the incubator through the water inlet pipe until water flows out of the overflow pipe. The water flow rate of the water inlet pipe is reduced and the water temperature is 23-26°C. The flow rate is controlled at 25 liters per 24 hours.

[0015] Place the hatching frame filled with fish eggs into the incubator, with the hatching frame floating in the water inside the incubator, and the screen 3-4 cm away from the water surface;

[0016] The end of the air supply branch pipe is placed in the incubator, and oxygen is continuously added to the water in the incubator through the air supply branch pipe;

[0017] After 72 hours, remove the hatching frame from the incubator and remove the unhatched eggs on the screen;

[0018] After another 144 hours, the overflow pipe is rotated so that the overflow pipe is horizontal, the water level in the incubator drops, the water and fry in the incubator are poured into the transfer box, and the fry are transferred to the breeding pond.

[0019] The beneficial effects of the present invention are as follows: by continuously providing water to simulate the flowing water in nature, the natural environment of the actual hatching of the croaker eggs is simulated, thereby improving the hatching rate; at the same time, the constant temperature of the water body is ensured to provide suitable external conditions for the hatching of the fish eggs, thereby improving the hatching rate of the fish eggs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a device for hatching croaker eggs in this embodiment;

[0021] Figure 2 This is a top view of the device for incubating croaker eggs in this embodiment;

[0022] Figure 3 This is a cross-sectional view of the incubator in this embodiment;

[0023] Figure 4 This is a partial structural diagram of the device for hatching croaker eggs in this embodiment;

[0024] Figure 5 for Figure 4 A magnified schematic diagram of point A in the middle;

[0025] Figure 6 This is a schematic diagram of a usage state of the incubator in this embodiment;

[0026] Figure 7 for Figure 6 A magnified schematic diagram of point A in the middle;

[0027] Figure 8 Schematic diagram of the placement state of the incubator in this embodiment.

[0028] Figure numerals: 1, bracket; 2, support plate; 3, incubator; 4, drainage trough; 5, water supply pump; 6, water supply main pipe; 7, water supply branch pipe; 8, water inlet pipe; 9, regulating valve; 10, sewage pipe; 11, incubation frame; 12, screen; 13, water outlet hole; 14, sealing sleeve; 15, overflow pipe; 16, filter cover; 17, drainage hole; 18, oxygen pump; 19, air supply main pipe; 20, air supply branch pipe; 21, downpipe; 22, introduction block; 23, limit block; 24, trigger three; 25, adjustment gear; 26, trigger rod; 27, contact sensor one; 28, contact sensor two; 29, lifting trough; 30, trigger one; 31, trigger two; 32, screw rod; 33, lifting plate; 34, support frame; 35, drive gear; 36, drive motor; 37, screw motor DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 3 As shown, a device for incubating fish eggs for smooth lipped fish includes several brackets 1 installed in a constant temperature room. The brackets 1 are provided with several support plates 2, which are evenly distributed from top to bottom on the brackets 1. The support plates 2 are provided with several incubator boxes 3, which are evenly distributed along the length of the support plates 2. The incubator boxes 3 are provided with incubation frames 11, and the lower portion of the incubation frames 11 is provided with a screen 12. The incubation frames 11 float in the water in the incubator boxes 3. The screen 12 is located 3-4 cm below the water surface, so that the fish eggs laid on the screen can contact the water. The mesh size of the screen 12 is 18-30, preferably 20 mesh, so that the fish eggs are larger than the size of the holes in the screen 12 and cannot pass through the holes in the screen 12. After the fish eggs are hatched, the size of the hatched fry is smaller than the size of the holes in the screen 12, so the fry can pass through the holes.

[0031] like Figure 3 As shown, a water outlet 13 is provided on the side wall of the incubator 3, and a filter cover 16 is installed in the incubator 3. The filter cover 16 covers the water outlet 13 and can prevent the fry from escaping from the water outlet 13 with the flowing water.

[0032] A sealing sleeve 14 is installed in the water outlet 13 , and an overflow pipe 15 is rotatably disposed in the sealing sleeve 14 . The overflow pipe 15 is an L-shaped structure, and one end of the horizontal section of the overflow pipe 15 extends into the filter cover 16 .

[0033] like Figure 2 As shown, the croaker egg hatching device also includes a water supply pump 5 and an oxygenation pump 18. The outlet of the water supply pump 5 is connected to a water supply main pipe 6. A plurality of water supply branch pipes 7 are connected to the side of the water supply main pipe 6. The water supply branch pipes 7 are located above the corresponding support plate 2. A plurality of water inlet pipes 8 are connected to the water supply branch pipes 7. A filter is provided at the connection between the water inlet pipes 8 and the water supply branch pipes 7 to reduce the particulate impurities in the water from rushing into the water pipes 8 and entering the incubator 3 and affecting the water quality.

[0034] The water inlet pipe 8 is provided corresponding to the incubator 3 , the outlet of the water inlet pipe 8 is located above the incubator 3 , and a regulating valve 9 is installed on the water inlet pipe 8 to regulate the flow of water entering the incubator 3 from the water inlet pipe 8 through the regulating valve 9 .

[0035] The aeration pump 18 is connected to a main air supply pipe 19, to which several branch air pipes 20 are connected. These branch air pipes 20 are positioned corresponding to the positions of the incubators 3. The other ends of these branch air pipes 20 are located inside the incubators 3 and connected to aeration heads. The aeration pump 18 supplies air to the water in the incubators 3 through the branch air pipes 20, thereby increasing oxygen.

[0036] Furthermore, a drainage trough 4 is connected to the support plate 2, and a drainage hole 17 is formed in the middle of the drainage trough 4. The outlet of the overflow pipe 15 is located within the range of the drainage trough 4. The bottom surface of the drainage trough 4 is set to be higher on both sides and lower in the middle, so that water overflowing from the overflow pipe 15 into the drainage trough 4 can flow to the drainage hole 17 in the middle and be discharged.

[0037] Furthermore, a downpipe 21 is provided at the bottom of the gutter 4. The upper end of the downpipe 21 is connected to the drain hole 17. The lower end of the downpipe 21 on the upper gutter 4 extends into the lower gutter 4, and the lower end of the downpipe 21 is a certain distance away from the drain hole 17 of the lower gutter 4. Water in the upper gutter 4 flows through the drain hole 17 and the downpipe 21 to the lower gutter 4, and then drains downward together with the water in the lower gutter 4.

[0038] Furthermore, one end of the water supply branch pipe 7 away from the water supply main pipe 6 is connected to a sewage pipe 10, and a sealing cover is threadedly connected to the lower end of the sewage pipe 10. Impurities in the water supply branch pipe 7 will enter the sewage pipe 10 with the water flow, and accumulate at the bottom of the sewage pipe 10. The sealing cover is opened regularly to discharge the impurities.

[0039] Furthermore, the incubator 3 is a rectangular parallelepiped of 575 mm × 390 mm × 250 mm, and is made of plastic; the incubator frame 11 is a rectangular parallelepiped of 540 mm × 380 mm × 50 mm, and is made of wood.

[0040] like Figure 4-Figure 8 As shown, a limit block 23 and an introduction block 22 are positioned on the upper portion of the support plate 2. The introduction block 22 and the limit block 23 are positioned in a front-to-rear manner, with one introduction block 22 and one limit block 23 positioned on each side of the incubator 3. A trigger 1 30 is positioned on the limit block 23. A trigger 2 31 is positioned on the support plate 2 in front of the limit block 23. A trigger 3 24 is positioned closer to the front of the support plate 2. The specific positioning of trigger 3 24 ensures that when the incubator 3 is placed flat on the support plate 2 with its rear side against the limit block 23, it cannot press against trigger 3 24.

[0041] An adjustment gear 25 is mounted on the overflow pipe 15. A lifting slot 29 is provided on the support plate 2 at a position corresponding to the position below the adjustment gear 25. A screw motor 37 is installed in the lifting slot 29. The screw motor 37 drives and connects to the screw 32, which is arranged vertically. A lifting plate 33 is mounted on the screw 32. The upper portion of the lifting plate 33 is connected to a support frame 34. A drive gear 35 is rotatably mounted on the support frame 34. A drive motor 36 is mounted on the lifting plate 33. The drive motor 36 is connected to the drive gear 35 via a belt drive. Specifically, the drive motor 36 is connected to a reducer, which is connected to a driving gear. The drive gear 35 is coaxially connected to a driven gear. A synchronous belt is connected between the driving gear and the driven gear.

[0042] A trigger lever 26 is connected to the side of the adjustment gear 25 near the incubator 3. Contact sensor 1 27 and contact sensor 2 28 are located on the front of the incubator 3. When the overflow pipe 15 is rotated to a vertical position, the overflow port of the overflow pipe 15 is located at the top, and the trigger lever 26 contacts contact sensor 1 27. When the overflow pipe 15 is rotated to a horizontal position, the overflow port of the overflow pipe 15 is flush with the water outlet 13, and the trigger lever 26 contacts contact sensor 2 28. Trigger 1 30, trigger 2 31, trigger 3 24, contact sensor 1 27, and contact sensor 2 28 are connected to the drive motor 36 and the lead screw motor 37 for signal signals.

[0043] In the initial state, the lifting plate 33 is located at the bottom of the lifting groove 29, so that the driving gear 35 is located in the lifting groove 29 and does not affect the placement of the incubator 3 on the support plate 2. Figure 6As shown, when placing the incubator 3, first tilt the incubator 3 so that its front end is higher than its rear end. Then, position the rear end of the incubator 3 on the support plate 2, behind the trigger 3 24. Keeping the incubator 3 tilted, push it backwards so that it doesn't come into contact with the trigger 3 24, preventing it from emitting a signal. The guide block 22 guides the movement of the incubator 3, ensuring that it reaches the designated position without shifting.

[0044] After the rear side of the tilted incubator 3 hits the top of the stop block 23, the incubator 3 is leveled and against the stop block 23. At this point, trigger 1 30 and trigger 2 31 are triggered simultaneously. Trigger 1 30 and trigger 2 31 send signals to the screw motor 37 and drive motor 36. The screw motor 37 drives the screw 32 to rotate, causing the lifting plate 33 to rise. The drive gear 35 on the lifting plate 33 moves upward and engages with the adjustment gear 25. The drive motor 36 drives the drive gear 35 to rotate, which in turn drives the overflow pipe 15 to rotate, causing the overflow pipe 15 to rotate to a vertical position. At this time, water is added to the incubator 3 through the water inlet pipe 8, so that the water level in the incubator 3 reaches a specified height.

[0045] When overflow pipe 15 rotates to a vertical position, trigger rod 26 contacts contact sensor 1 27, which sends a signal to stop drive motor 36. Screw motor 37 can either stop, allowing drive gear 35 to remain engaged with adjustment gear 25, or drive screw 32 to rotate, causing lift plate 33 to drive drive gear 35 back into lift slot 29.

[0046] When the tilted incubator 3 moves, it will contact the trigger 1 30 or the trigger 2 31 before reaching the designated position. If only the trigger 1 30 or the trigger 2 31 is provided, a signal will be issued when the incubator 3 is in the wrong position, causing an operational error. By providing both the trigger 1 30 and the trigger 2 31, the trigger 1 30 and the trigger 2 31 are triggered simultaneously when the incubator 3 reaches the designated position, and the signal issued at this time enables the device to operate normally.

[0047] Before transporting the fry, since the incubators 3 contain a large amount of water, some of the water needs to be drained to facilitate removal from the support plate 2. One method is for a worker to rotate the overflow pipes 15 on each incubator 3, starting from right to left, to a horizontal position. After adjusting the overflow pipe 15 on the leftmost incubator 3, the worker returns to the rightmost incubator 3. At this point, most of the water in the incubator 3 flows out, reducing the overall weight of the incubator 3. This allows the worker to conveniently remove the incubator 3 from the support plate 2.

[0048] Since the overflow pipe 15 is directly rotated from the vertical state to the horizontal state, the water in the hatching box 3 flows out quickly. The excessive flow rate will cause the fry to flow with the water, and may hit the inner wall of the hatching box 3 or the filter cover 16, or may collide with each other, affecting the fry.

[0049] In order to reduce the influence of drainage on the fry in the incubator 3, it is necessary to allow the water in the incubator 3 to overflow slowly. Before transport, the incubator 3 is pulled forward a certain distance so that the incubator 3 presses the trigger 3 24, which is pressed to send a signal. If the front drive gear 35 remains in the meshing state of the adjustment gear 25, after the trigger 3 24 sends a signal, the drive motor 36 drives the drive gear 35 to rotate in the opposite direction, so that the overflow pipe 15 slowly rotates to a horizontal state. If the front lifting plate 33 drives the drive gear 35 back into the lifting groove 29, after the trigger 3 24 sends a signal, the screw motor 37 drives the screw rod 32 to rotate, so that the lifting plate 33 carries the drive gear 35 and rises until the drive gear 35 is meshed with the adjustment gear 25. The drive motor 36 then drives the drive gear 35 to rotate in the opposite direction, so that the overflow pipe 15 slowly rotates to a horizontal state. Since the overflow pipe 15 is converted to a horizontal state at a slower speed, the water in the incubator 3 can slowly flow out to reduce the influence of drainage on the fry in the incubator 3.

[0050] After the overflow pipe 15 rotates to a horizontal state, the trigger rod 26 contacts the contact sensor 28, which sends a signal to cause the screw motor 37 to drive the lifting plate 33 to descend, causing the driving gear 35 to return to the support plate 2. After the incubator 3 is removed from the support plate 2, no interference will be caused.

[0051] A method for hatching fish eggs comprises the following steps:

[0052] The croaker egg incubation device is arranged in a constant temperature room, and the temperature is maintained at 23-26°C, preferably 25°C.

[0053] The incubators 3 are placed on the support plate 2 in sequence, the overflow pipe 15 is in a vertical state, and water is injected into the incubator 3 through the water inlet pipe 8. After water flows out of the overflow pipe 15, the water outlet flow rate of the water inlet pipe 8 is reduced, and the water temperature is 23-26°C, preferably 25°C; the water outlet flow rate is controlled at 25 liters per 24 hours.

[0054] The hatching frame 11 filled with fish eggs is placed in the incubator 3. The hatching frame 11 floats in the water in the incubator 3. The screen 12 is located 3-4 cm below the water surface so that the fish eggs can fully contact the water. A gap is left between the hatching frame 11 and the inner wall of the incubator 3 so that the hatching frame 11 can float in the incubator 3, which helps the flow of water in the incubator 3 and can simulate the water flow state in the wild environment.

[0055] The end of the air supply branch pipe 20 is placed in the incubator 3 , and oxygen is continuously added to the water in the incubator 3 through the air supply branch pipe 20 .

[0056] Fish eggs are generally hatched in about 48 hours. The size of the fry after hatching is smaller than that of the fish eggs and can pass through the mesh on the screen 12 to reach below the hatching frame 11, so that the fry can have a larger living space.

[0057] After 72 hours, the fish eggs that this moment stayed on the screen cloth 12 generally can't be hatched again, and these fish eggs stayed in the incubator box 3 and may rot and affect water quality, then affect the survival of fry. Hatching frame 11 is taken out in incubator box 3, remove the fish eggs that do not hatch on the screen cloth 12.

[0058] The cleaned hatching frame 11 is stored and waits for next use.

[0059] After another 144 hours, the overflow pipe 15 is rotated so that the overflow pipe 15 is horizontal, causing the water level in the incubator 3 to drop to the lower end of the water outlet 13, thereby reducing the amount of water in the incubator 3 and reducing the overall weight of the incubator 3, making it easier to remove the incubator 3 from the support plate 2. The water and fry in the incubator 3 are poured into the transfer box, and the fry are then transferred to the breeding pond.

[0060] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for incubating fish eggs of smooth lipped fish, characterized in that: The invention comprises a plurality of brackets (1), a plurality of support plates (2) are arranged on the brackets (1), a plurality of incubators (3) are arranged on the support plates (2), an incubator frame (11) is arranged in the incubator (3), a screen (12) is arranged at the lower part of the incubator frame (11), a water outlet (13) is opened on the side wall of the incubator (3), a filter cover (16) is installed in the incubator (3), the filter cover (16) covers the water outlet (13), an overflow pipe (15) is inserted in the water outlet (13), and the overflow pipe ( 15) can rotate; it also includes a water supply pump (5) and an oxygenation pump (18), the outlet of the water supply pump (5) is connected to a water supply main pipe (6), the side of the water supply main pipe (6) is connected to a plurality of water supply branches (7), the water supply branches (7) are connected to a plurality of water inlet pipes (8), the water inlet pipes (8) are arranged corresponding to the incubator (3), the oxygenation pump (18) is connected to an air supply main pipe (19), the air supply main pipe (19) is connected to a plurality of air supply branches (20), and the air supply branches (20) are arranged corresponding to the position of the incubator (3).

2. A device for hatching fish eggs of smooth lipped fish according to claim 1, characterized in that: A sealing sleeve (14) is installed in the water outlet hole (13), and the overflow pipe (15) is rotatably arranged in the sealing sleeve (14).

3. A device for hatching fish eggs of smooth lipped fish according to claim 1, characterized in that: The support plate (2) is connected to a drainage groove (4), and a drainage hole (17) is provided in the middle of the drainage groove (4).

4. A device for hatching fish eggs of smooth lipped fish according to claim 3, characterized in that: The outlet of the overflow pipe (15) is located within the range of the drainage trough (4).

5. A device for hatching fish eggs of smooth lipped fish according to claim 3, characterized in that: A downpipe (21) is provided at the lower portion of the drainage trough (4), and the upper end of the downpipe (21) is connected to the drainage hole (17).

6. A device for incubating croaker eggs according to claim 1, characterized in that: The mesh number of the sieve (12) is 18-30 meshes.

7. The device for incubating croaker eggs according to claim 1, characterized in that: One end of the water supply branch pipe (7) away from the water supply main pipe (6) is connected to a sewage pipe (10).

8. The device for incubating croaker eggs according to claim 1, wherein: The incubator (3) is a rectangular parallelepiped with dimensions of 575 mm × 390 mm × 250 mm; and the incubator frame (11) is a rectangular parallelepiped with dimensions of 540 mm × 380 mm × 50 mm.

9. A method for hatching fish eggs using the fish egg hatching device of any one of claims 1 to 8, characterized in that: The following steps are involved: S1 and the incubator (3) are placed on the support plate (2) in sequence, the overflow pipe (15) is in a vertical state, and water is injected into the incubator (3) through the water inlet pipe (8). After water flows out of the overflow pipe (15), the water flow rate of the water inlet pipe (8) is reduced, and the water temperature is 23-26° C.; the flow rate is controlled at 25 liters per 24 hours; S2, placing the hatching frame (11) covered with fish eggs into the incubator (3), wherein the hatching frame (11) floats in the water in the incubator (3), and the screen (12) is 3-4 cm away from the water surface; S3, the end of the air supply branch pipe (20) is placed in the incubator (3), and oxygen is continuously added to the water in the incubator (3) through the air supply branch pipe (20); S4. After 72 hours, the hatching frame (11) is taken out from the hatching box (3) and the unhatched eggs on the screen (12) are removed; S5. After another 144 hours, the overflow pipe (15) is rotated so that the overflow pipe (15) is in a horizontal state, the water level in the incubator (3) drops, and the water and fry in the incubator (3) are poured into the transfer box, and the fry are transferred to the breeding pond.

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