Equipment and methods for cultivating silver carp and bighead carp fry in large waters

Abstract

This invention relates to the field of aquaculture technology and discloses a large-scale silver carp and bighead carp seedling cultivation equipment, including a cultivation net cage. A support frame one is installed near the top of the inner wall of the cultivation net cage, and a support frame two is installed near the bottom of the inner wall of the cultivation net cage. A partition net is installed between the inner wall of the support frame two and the inner wall of the cultivation net cage. An oxygen distribution mechanism for uniform oxygen distribution is provided inside the cultivation net cage. The oxygen distribution mechanism includes an oxygenation drive component and an oxygen distribution component. This invention, by setting a differentially rotating oxygen delivery main pipe and a fan-shaped blocking plate, can intermittently block the first oxygen delivery nozzle, causing the internal air pressure of the oxygen delivery branch pipe to periodically increase. This significantly increases the air output rate of the second oxygen delivery nozzle and the nozzle branch pipe, effectively enhancing the oxygen supply intensity near the outer water area of ​​the cultivation net cage. It specifically compensates for the low dissolved oxygen in the outer water body due to its distance from the air source, greatly improving the uniformity of oxygen distribution throughout the entire net cage area.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, specifically relating to equipment and methods for cultivating silver carp and bighead carp fry in large waters. Background Technology

[0002] Large-scale intensive aquaculture of silver carp and bighead carp fry typically employs net cages, where dissolved oxygen levels are a key factor influencing fry survival and growth rates. Currently, common aeration equipment for fry rearing often uses a central air source combined with fixed aeration pipes or microporous aeration discs to deliver oxygen to the inside of the net cages via pipelines.

[0003] However, in actual use, such equipment results in a significant problem because oxygen enters the pipeline system from the central location, and the gas pressure gradually decreases along the pipeline. This leads to a large air volume and sufficient oxygen release near the air source and the near end of the pipeline, while the air volume at the end of the pipeline and the outer area of ​​the net cage is significantly reduced. This causes extremely uneven distribution of dissolved oxygen inside the cultivation net cage. The dissolved oxygen concentration in the central water area is often maintained at a high level, and even supersaturation occurs in some areas. Meanwhile, the outer area of ​​the net cage, especially the area near the edge of the net, is in a state of low oxygen or hypoxia for a long time. For filter-feeding fish such as silver carp and bighead carp, which are sensitive to changes in dissolved oxygen, the fry have weak swimming ability during the cultivation stage and are unable to actively migrate to high oxygen areas. Being in a low oxygen environment on the periphery for a long time will inhibit their feeding and metabolism, leading to slow growth, decreased immunity, and in severe cases, hypoxia and even large-scale mortality. Therefore, we propose a large-scale silver carp and bighead carp fry cultivation equipment and method. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A large-scale water surface silver carp and bighead carp seedling cultivation equipment includes a cultivation net cage. A support frame one is installed on the inner wall of the cultivation net cage near the top, and a support frame two is installed on the inner wall of the cultivation net cage near the bottom. A partition net is installed between the inner wall of the support frame two and the inner wall of the cultivation net cage. An oxygen distribution mechanism for uniform oxygen distribution is provided inside the cultivation net cage. The oxygen distribution mechanism includes an oxygenation drive component and an oxygen distribution component. The oxygenation drive component is located above the support frame one, and the oxygen distribution component is located below the support frame two.

[0005] In a preferred embodiment of the present invention, the oxygenation drive assembly includes an oxygenator, an oxygen delivery pipe, and a motor. The oxygenator is mounted on the top of a support frame one, and a support shell is mounted on the top of the support frame one. The oxygen delivery pipe passes through the support shell, support frame one, and support frame two, and is rotatably connected to support frame one and support shell via bearings. An oxygen delivery pipe is connected to the output end of the oxygenator, and one end of the oxygen delivery pipe is connected to the oxygen delivery pipe via a rotary joint. A rotating shaft is mounted on the output end of the motor. A connecting cylinder is sleeved on the outside of the oxygen delivery pipe, and the connecting cylinder movably passes through support frame two, and is rotatably connected to the outer wall of the rotating shaft. A protective shell is rotatably sleeved on the outer wall of the connecting cylinder via bearings. A connecting column is connected between the top of the protective shell and the bottom of support frame two. The rotating shaft passes through the support shell, support frame one, support frame two, and protective shell, and is rotatably connected to support frame one and protective shell via bearings. The rotating shaft is drive-connected to the oxygen delivery pipe and the connecting cylinder.

[0006] In a preferred embodiment of the present invention, a large gear and a small gear are provided inside the support shell. The large gear is fixedly sleeved on the outer wall of the rotating shaft, and the small gear is fixedly sleeved on the outer wall of the oxygen guiding pipe. The large gear and the small gear mesh with each other. A support ring plate is fixedly sleeved on the outer wall of the oxygen guiding pipe. A support ring groove is opened on the inner wall of the connecting cylinder. The support ring plate is rotatably connected to the support ring groove. By setting the support ring plate, the connecting cylinder can be limited and supported, ensuring the stability of the connecting cylinder during rotation.

[0007] In a preferred embodiment of the present invention, a large gear II and a small gear II are provided inside the protective shell. The large gear II is fixedly sleeved on the outer wall of the connecting cylinder, and the small gear II is installed at the bottom end of the rotating shaft. The large gear II and the small gear II mesh. A T-shaped ring plate is installed at the top of the connecting cylinder, and a T-shaped ring groove is opened at the bottom end of the support frame. The T-shaped ring plate and the T-shaped ring groove are rotatably connected. By setting the T-shaped ring plate, the connecting cylinder can be limited, so that the connecting cylinder can be fixedly rotated at the bottom of the support frame.

[0008] In a preferred embodiment of the present invention, the oxygen distribution assembly includes two fan-shaped blocking plates, which are installed on both sides of the outer wall near the bottom end of the connecting cylinder. Oxygen-conducting main pipes are connected to oxygen-conducting branch pipes near both sides of the bottom end. Multiple oxygen delivery nozzles (first type) are connected to the top of the oxygen-conducting branch pipes near the oxygen-conducting main pipe, and multiple oxygen delivery nozzles (second type) are connected to the top of the oxygen-conducting branch pipes away from the oxygen-conducting main pipe. The top of each oxygen delivery nozzle (first type) is slidably connected to the bottom end of the fan-shaped blocking plate. Both sides of each oxygen delivery nozzle (second type) are connected to nozzle branch pipes, and elastic blocking components are provided at the openings of the nozzle branch pipes.

[0009] In a preferred embodiment of the present invention, the elastic plugging component includes a plugging block, a fixing frame is installed on the outer wall of the nozzle branch pipe, the plugging block is engaged with the nozzle branch pipe opening, a limiting rod is installed at the top of the plugging block, the limiting rod extends through the top of the fixing frame, a spring surrounds the outer wall of the limiting rod, and the spring is installed between the top of the inner wall of the fixing frame and the top of the plugging block. By setting the limiting rod, the plugging block and the spring can be limited, ensuring the stability of the plugging block and the spring during compression in use.

[0010] In a preferred embodiment of the present invention, a sleeve plate is installed at the top of the blocking plate, a Z-shaped top plate is inserted into the top of the sleeve plate, a protrusion 1 is installed at the top of the Z-shaped top plate, a plurality of protrusions 2 are installed at the bottom of the support frame 2, and a spring 2 is connected between the bottom of the Z-shaped top plate and the bottom of the inner wall of the sleeve plate.

[0011] In a preferred embodiment of the present invention, the first protrusion and the second protrusion are positioned opposite each other, and the shape of the first protrusion and the second protrusion is hemispherical. By designing the first protrusion and the second protrusion as hemispherical, the first protrusion and the second protrusion can slide relative to each other when in contact, so that the second protrusion can normally press the first protrusion downward.

[0012] In a preferred embodiment of the present invention, a limiting rod two is installed at the bottom end of the inner wall of the sleeve plate. The limiting rod two is inserted into the rod groove opened at the bottom end of the Z-shaped top plate. The spring two surrounds the outer wall of the limiting rod two. By setting the limiting rod two, the spring two can be limited, ensuring the stability of the spring two when compressed.

[0013] This invention also provides a method for cultivating silver carp and bighead carp fry in large waters, comprising the following steps: S1: When it is necessary to oxygenate the water in the cultivation net cage, first start the aerator and motor in the aeration drive assembly; the compressed oxygen generated by the aerator enters the oxygen main pipe that runs vertically through the support shell, support frame one and support frame two through the oxygen delivery pipe and rotary joint. Then the oxygen is diverted into the oxygen branch pipes on both sides of the bottom of the oxygen main pipe, and finally sprayed out from the oxygen delivery nozzle one and oxygen delivery nozzle two and the nozzle branch pipe in the oxygen distribution assembly, forming a large number of micro bubbles in the cultivation net cage, thereby increasing the dissolved oxygen content of the water. S2: In the above process, the output shaft of the motor drives the rotating shaft to rotate. The rotating shaft drives the oxygen conveying main pipe to rotate at the first speed through the meshing transmission of the large gear 1 and the small gear 1 inside the support shell. The oxygen conveying main pipe obtains active rotational power, which in turn drives the oxygen conveying branch pipes on both sides to make circular motion in the horizontal plane, significantly expanding the aeration coverage of oxygen delivery nozzle 1 and oxygen delivery nozzle 2. S3: At the same time, the small gear II installed at the bottom of the shaft meshes with the large gear II fixedly sleeved on the outer wall of the connecting cylinder inside the protective shell, thereby driving the connecting cylinder to rotate at the second speed. Due to the difference in the number of teeth of the large and small gears, the speed of the oxygen guiding main pipe is faster than that of the connecting cylinder, that is, the two form a differential rotation. Fan-shaped blocking plates are installed on both sides of the outer wall near the bottom of the connecting cylinder, and multiple oxygen delivery nozzles at the top of the oxygen guiding branch pipe are located below the fan-shaped blocking plates and slide in contact with the bottom of the fan-shaped blocking plates. It is precisely because of the difference in the speed of the oxygen guiding main pipe and the connecting cylinder that the fan-shaped blocking plates will intermittently cover and block the oxygen delivery nozzles during continuous rotation. S4: When the fan-shaped blocking plate rotates to directly above the oxygen supply nozzle one, the nozzle is temporarily closed, causing the air pressure inside the oxygen supply branch pipe to rise instantaneously. This pressure increase effect significantly accelerates the air output rate of the oxygen supply nozzle two, thereby enhancing the oxygen supply intensity to the waters surrounding the cultivation cage. On the other hand, the increased pressure overcomes the pre-tightening force of the spring of the elastic blocking component at the nozzle branch pipe opening. The pressure pushes the blocking block upward, preventing it from closing the nozzle branch pipe opening. This allows some oxygen to be ejected from the side of the normally closed nozzle branch pipe, further supplementing the oxygen demand of the surrounding water. S5: When the fan-shaped blocking plate rotates past the position of oxygen supply nozzle one, nozzle one is unblocked, the pressure inside the pipe drops, and the elastic blocking component re-closes the nozzle branch pipe under the action of spring one, thereby realizing the periodic dynamic adjustment of oxygen supply to the center and the periphery, making the dissolved oxygen distribution within the entire cage range tend to be uniform. S6: In addition, the rotation of the connecting cylinder also causes the sleeve plate installed above the fan-shaped blocking plate and its internal Z-shaped top plate to move in a circular motion. The top of the Z-shaped top plate is provided with a hemispherical protrusion 1, while the bottom of the support frame 2 is provided with multiple hemispherical protrusions 2 along the circumferential direction. The two are positioned opposite each other. When the Z-shaped top plate rotates with the connecting cylinder until protrusion 1 contacts a certain protrusion 2, protrusion 2 presses down on protrusion 1, forcing the Z-shaped top plate to overcome the elastic force of spring 2 and slide down along the inner wall of the sleeve plate. When protrusion 1 continues to rotate and disengages from the contact of protrusion 2, the Z-shaped top plate quickly rebounds upward under the reset action of spring 2, thereby repeatedly hitting the partition net below the support frame 2 with its top. This intermittent impact action causes the partition net to generate high-frequency micro-amplitude vibration, effectively breaking the oxygenation bubbles attached to the lower surface of the partition net, preventing the bubbles from accumulating into large bubbles or remaining in the mesh, ensuring that small bubbles can pass through the partition net smoothly and continue to float to the entire water layer of the cultivation net cage, thereby further improving the oxygenation efficiency and uniformity.

[0014] Compared with the prior art, the present invention has the following advantages: This invention, by setting a differentially rotating oxygen-conducting main pipe and a fan-shaped blocking plate, can intermittently block the first oxygen-conducting nozzle, causing the internal air pressure of the oxygen-conducting branch pipe to increase periodically. This significantly increases the air output rate of the second oxygen-conducting nozzle and the nozzle branch pipe, effectively enhancing the oxygen supply intensity of the breeding cage near the outer water area. It specifically compensates for the low dissolved oxygen in the outer water body caused by its distance from the air source, and greatly improves the uniformity of oxygen distribution throughout the entire cage.

[0015] In this invention, when the fan-shaped blocking plate closes the oxygen supply nozzle, the pressure inside the oxygen delivery branch pipe rises, forcing the elastic blocking component to automatically open the nozzle branch pipe, allowing the normally closed side nozzle to supplement oxygen to the surrounding water body, thereby further improving the oxygen supply efficiency of the periphery, realizing a dynamic balance between the oxygen supply intensity of the center and the periphery, avoiding oversaturation or insufficient dissolved oxygen in a single area, and significantly optimizing the overall dissolved oxygen environment of the seedling cultivation water area.

[0016] This invention utilizes a connecting cylinder to drive a Z-shaped top plate in a circular motion. Through periodic contact with the second fixed protrusion, it generates vertical reciprocating bounces, which intermittently impact the screen, causing the screen to vibrate at high frequency and micro-amplitude. This effectively breaks up oxygenating bubbles attached to the surface of the screen, prevents bubbles from accumulating and stagnating, and ensures that small bubbles can pass through the screen smoothly and continue to float, greatly improving oxygenation efficiency and dissolved oxygen quality in the water.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram of section B; Figure 4 For the present invention Figure 2 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the bottom structure of the support frame II of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of section C; Figure 7 This is a schematic diagram of the front cross-sectional structure of the nozzle branch pipe of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram of section D in the middle; Figure 9 This is a schematic diagram of the front cross-sectional structure of the sleeve plate of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram of section E in the middle; Figure 11 This is a front cross-sectional view of the connecting cylinder of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural diagram of the middle F section.

[0019] In the diagram: 1. Cultivation cage; 2. Support frame one; 3. Support shell; 4. Motor; 5. Large gear one; 6. Main oxygen supply pipe; 7. Small gear one; 8. Aerator; 9. Oxygen supply pipe; 10. Connecting cylinder; 11. T-shaped ring plate; 12. T-shaped ring groove; 13. Rotating shaft; 14. Support frame two; 15. Partition net; 16. Protective shell; 17. Small gear two; 18. Large gear two; 19. Fan-shaped blocking plate; 20. Oxygen supply branch pipe; 21. Oxygen supply nozzle one; 22. Oxygen supply nozzle two; 23. Connecting column; 24. Nozzle branch pipe; 25. Block; 26. Fixing frame; 27. Limiting rod one; 28. Spring one; 29. ​​Sleeve plate; 30. Z-shaped top plate; 31. Protrusion one; 32. Protrusion two; 33. Limiting rod two; 34. Spring two; 35. Support ring plate; 36. Support ring groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] like Figures 1 to 12 As shown, the present invention provides a technical solution: a large-scale silver carp and bighead carp seedling cultivation device, including a cultivation net cage 1, a support frame 2 installed near the top of the inner wall of the cultivation net cage 1, a support frame 2 14 installed near the bottom of the inner wall of the cultivation net cage 1, a partition net 15 installed between the inner wall of the support frame 2 14 and the inner wall of the cultivation net cage 1, and an oxygen distribution mechanism that can evenly distribute oxygen is provided inside the cultivation net cage 1. The oxygen distribution mechanism includes an oxygenation drive component and an oxygen distribution component. The oxygenation drive component is located above the support frame 2, and the oxygen distribution component is located below the support frame 2 14.

[0022] Furthermore, the oxygenation drive assembly includes an oxygenator 8, an oxygen delivery main pipe 6, and a motor 4. The oxygenator 8 is mounted on the top of support frame 1 2, and a support shell 3 is mounted on the top of support frame 1 2. The oxygen delivery main pipe 6 passes through the support shell 3, support frame 1 2, and support frame 2 14, and is rotatably connected to support frame 1 2 and support shell 3 via bearings. An oxygen delivery pipe 9 is connected to the output end of the oxygenator 8, and one end of the oxygen delivery pipe 9 is connected to the oxygen delivery main pipe 6 via a rotary joint. A rotating shaft 13 is mounted on the output end of the motor 4, and a connecting rod is sleeved on the outside of the oxygen delivery main pipe 6. Connecting cylinder 10 movably passes through support frame 2 14, and is rotatably connected to the outer wall of rotating shaft 13. A protective shell 16 is rotatably sleeved on the outer wall of connecting cylinder 10 through bearings. A connecting column 23 is connected between the top of the protective shell 16 and the bottom of support frame 2 14. Rotating shaft 13 passes through support shell 3, support frame 1 2, support frame 2 14 and protective shell 16, and is rotatably connected to support frame 1 2 and protective shell 16 through bearings. Rotating shaft 13 is drive-connected to oxygen main pipe 6 and drive-connected to connecting cylinder 10.

[0023] Furthermore, the support shell 3 is provided with a large gear 5 and a small gear 7. The large gear 5 is fixedly sleeved on the outer wall of the rotating shaft 13, and the small gear 7 is fixedly sleeved on the outer wall of the oxygen guide pipe 6. The large gear 5 and the small gear 7 mesh with each other. The outer wall of the oxygen guide pipe 6 is fixedly sleeved with a support ring plate 35. The inner wall of the connecting cylinder 10 is provided with a support ring groove 36. The support ring plate 35 and the support ring groove 36 are rotatably connected. The support ring plate 25 can provide a limiting support for the connecting cylinder 10, ensuring the stability of the connecting cylinder 10 during rotation.

[0024] Furthermore, the protective shell 16 is provided with a large gear 18 and a small gear 17 inside. The large gear 18 is fixedly sleeved on the outer wall of the connecting cylinder 10, and the small gear 17 is installed at the bottom of the rotating shaft 13. The large gear 18 and the small gear 17 mesh. A T-shaped ring plate 11 is installed at the top of the connecting cylinder 10, and a T-shaped ring groove 12 is opened at the bottom of the support frame 2. The T-shaped ring plate 11 and the T-shaped ring groove 12 are rotatably connected. The T-shaped ring plate 11 can limit the connecting cylinder 10, allowing the connecting cylinder 10 to be fixed and rotated at the bottom of the support frame 2.

[0025] Furthermore, the oxygen distribution assembly includes two fan-shaped blocking plates 19, which are installed on both sides of the outer wall near the bottom end of the connecting cylinder 10. The oxygen main pipe 6 is connected to the two sides near the bottom end with oxygen branch pipes 20. Multiple oxygen delivery nozzles 1 21 are connected to the top of the oxygen branch pipes 20 near the oxygen main pipe 6, and multiple oxygen delivery nozzles 22 are connected to the top of the oxygen branch pipes 20 away from the oxygen main pipe 6. The top of the oxygen delivery nozzles 1 21 is slidably connected to the bottom end of the fan-shaped blocking plates 19. Both sides of the oxygen delivery nozzles 22 are connected to nozzle branch pipes 24, and elastic blocking components are provided at the openings of the nozzle branch pipes 24.

[0026] Furthermore, the elastic blocking component includes a blocking block 25, a fixing bracket 26 is installed on the outer wall of the nozzle branch pipe 24, the blocking block 25 is engaged with the nozzle branch pipe 24 opening, a limiting rod 27 is installed at the top of the blocking block 25, the limiting rod 27 moves through the top of the fixing bracket 26, a spring 28 is surrounded on the outer wall of the limiting rod 27, and the spring 28 is installed between the top of the inner wall of the fixing bracket 26 and the top of the blocking block 25; By setting a limit rod 27, the block 25 and the spring 28 can be limited to ensure the stability of the block 25 and the spring 28 during compression.

[0027] Furthermore, a sleeve plate 29 is installed at the top of the blocking plate, a Z-shaped top plate 30 is inserted into the top of the sleeve plate 29, a protrusion 31 is installed at the top of the Z-shaped top plate 30, multiple protrusions 32 are installed at the bottom of the support frame 14, and a spring 34 is connected between the bottom of the Z-shaped top plate 30 and the bottom of the inner wall of the sleeve plate 29.

[0028] Furthermore, the positions of bump 1 31 and bump 2 32 are opposite, and the shapes of bump 1 31 and bump 2 32 are both hemispherical. By designing protrusion 1 31 and protrusion 2 32 as hemispherical, protrusion 1 31 and protrusion 2 32 can slide relative to each other when in contact, so that protrusion 2 32 can normally press protrusion 1 31 downward.

[0029] Furthermore, a limiting rod 23 is installed at the bottom of the inner wall of the sleeve plate 29. The limiting rod 23 is inserted into the rod groove opened at the bottom of the Z-shaped top plate 30, and the spring 24 surrounds the outer wall of the limiting rod 23. Among them, by setting the limiting rod 33, the spring 34 can be limited, ensuring the stability of the spring 34 during compression.

[0030] This invention also provides a method for cultivating silver carp and bighead carp fry in large waters, comprising the following steps: S1: First, silver carp and bighead carp fry are placed in the cultivation net cage. Then, personnel regularly feed the fry in the cultivation net cage. During the cultivation of the fry, the water in the cultivation net cage 1 needs to be oxygenated. When oxygenating, the aerator 8 and motor 4 in the aeration drive assembly are started first. The compressed oxygen generated by the aerator 8 enters the oxygen main pipe 6, which runs vertically through the support shell 3, support frame 1 2 and support frame 2 14, through the oxygen supply pipe 9 and the rotary joint. Then, the oxygen is diverted into the oxygen branch pipes 20 on both sides of the bottom of the oxygen main pipe 6, and finally sprayed out from the oxygen supply nozzle 1 21 and oxygen supply nozzle 22 and the nozzle branch pipe 24 in the oxygen distribution assembly, forming a large number of microbubbles in the cultivation net cage 1, thereby increasing the dissolved oxygen content of the water.

[0031] S2: In the above process, the output shaft of the motor 4 drives the rotating shaft 13 to rotate. The rotating shaft 13 drives the oxygen guide main pipe 6 to rotate at the first speed through the meshing transmission of the large gear 5 and the small gear 7 inside the support shell 3. The oxygen guide main pipe 6 obtains active rotation power, which in turn drives the oxygen guide branch pipes 20 on both sides to make circular motion in the horizontal plane, significantly expanding the aeration coverage of the oxygen delivery nozzle 21 and the oxygen delivery nozzle 22. S3: At the same time, the small gear 17 installed at the bottom of the rotating shaft 13 meshes with the large gear 18 fixedly sleeved on the outer wall of the connecting cylinder 10 inside the protective shell 16, thereby driving the connecting cylinder 10 to rotate at the second speed. Due to the difference in the number of teeth of the large and small gears, the speed of the oxygen guide pipe 6 is faster than the speed of the connecting cylinder 10, that is, the two form a differential rotation. Fan-shaped blocking plates 19 are installed on both sides of the outer wall near the bottom end of the connecting cylinder 10, and multiple oxygen delivery nozzles 21 at the top of the oxygen guide branch pipe 20 are located below the fan-shaped blocking plates 19 and slide in contact with the bottom end of the fan-shaped blocking plates 19. It is precisely because the speed of the oxygen guide pipe 6 and the connecting cylinder 10 is different that the fan-shaped blocking plates 19 will intermittently cover and block the oxygen delivery nozzles 21 during continuous rotation. S4: When the fan-shaped blocking plate 19 rotates to directly above the oxygen supply nozzle 21, the nozzle is temporarily closed, causing the air pressure inside the oxygen supply branch pipe 20 to rise instantaneously. This pressure increase effect significantly accelerates the air output rate of the oxygen supply nozzle 22, thereby enhancing the oxygen supply intensity to the waters surrounding the cultivation cage 1. On the other hand, the increased pressure overcomes the pre-tightening force of the spring 28 of the elastic blocking component at the nozzle branch pipe 24. The pressure pushes the blocking block 25 upward, preventing it from closing the nozzle branch pipe 24, allowing some oxygen to be ejected from the side of the normally closed nozzle branch pipe 24, further supplementing the oxygen demand of the surrounding waters. S5: When the fan-shaped blocking plate 19 rotates past the position of the oxygen supply nozzle 21, the nozzle is unblocked, the pressure inside the pipe drops, and the elastic blocking component re-closes the nozzle branch pipe 24 under the action of the spring 28, thereby realizing the periodic dynamic adjustment of the oxygen supply to the center and the periphery, so that the dissolved oxygen distribution in the entire cage tends to be uniform.

[0032] S6: In addition, the rotation of the connecting cylinder 10 also causes the sleeve plate 29 installed above the fan-shaped blocking plate 19 and its internal Z-shaped top plate 30 to move in a circular motion together; the top of the Z-shaped top plate 30 is provided with a hemispherical protrusion 31, while the bottom of the support frame 14 is provided with multiple hemispherical protrusions 32 along the circumferential direction. The two are positioned opposite each other. When the Z-shaped top plate 30 rotates with the connecting cylinder 10 until protrusion 31 contacts a certain protrusion 32, protrusion 32 presses down on protrusion 31, forcing the Z-shaped top plate 30 to overcome the elastic force of the spring 34 and slide down along the inner wall of the sleeve plate 29. When protrusion 31 continues to rotate and disengages from protrusion 32, the Z-shaped top plate 30 rebounds rapidly upward under the reset action of spring 34, thereby repeatedly striking the mesh 15 below the support frame 14 with its top end. This intermittent impact action causes the mesh 15 to generate high-frequency micro-amplitude vibration, effectively breaking the oxygenation bubbles attached to the lower surface of the mesh 15, preventing the bubbles from accumulating into large bubbles or remaining in the mesh, and ensuring that small bubbles can pass smoothly through the mesh 15 and continue to float to the entire water layer of the cultivation net box 1, thereby further improving the oxygenation efficiency and uniformity. Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-scale water surface silver carp and bighead carp fry cultivation equipment, including a cultivation net cage (1), characterized in that, The inner wall of the cultivation net box (1) is equipped with a support frame one (2) near the top, and the inner wall of the cultivation net box (1) is equipped with a support frame two (14) near the bottom. A partition net (15) is installed between the inner wall of the support frame two (14) and the inner wall of the cultivation net box (1). The cultivation net box (1) is equipped with an oxygen distribution mechanism that can distribute oxygen evenly. The oxygen distribution mechanism includes an oxygenation drive component and an oxygen distribution component. The oxygenation drive component is located above the support frame one (2), and the oxygen distribution component is located below the support frame two (14).

2. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 1, characterized in that, The oxygenation drive assembly includes an oxygenator (8), an oxygen delivery pipe (6), and a motor (4). The oxygenator (8) is mounted on the top of a support frame (2). A support shell (3) is mounted on the top of the support frame (2). The oxygen delivery pipe (6) passes through the support shell (3), the support frame (2), and the support frame (14). The oxygen delivery pipe (6) is rotatably connected to the support frame (2) and the support shell (3) via bearings. An oxygen delivery pipe (9) is connected to the output end of the oxygenator (8). One end of the oxygen delivery pipe (9) is connected to the oxygen delivery pipe (6) via a rotary joint. A rotating shaft (13) is mounted on the output end of the motor (4). A connecting sleeve is sleeved on the outside of the oxygen delivery pipe (6). (10) The connecting cylinder (10) movably passes through the second support frame (14), and the connecting cylinder (10) is rotatably connected to the outer wall of the rotating shaft (13). The outer wall of the connecting cylinder (10) is rotatably fitted with a protective shell (16) through a bearing. A connecting column (23) is connected between the top of the protective shell (16) and the bottom of the second support frame (14). The rotating shaft (13) passes through the support shell (3), the first support frame (2), the second support frame (14) and the protective shell (16). The rotating shaft (13) is rotatably connected to the first support frame (2) and the protective shell (16) through a bearing. The rotating shaft (13) is driven to the oxygen guide pipe (6). The rotating shaft (13) is driven to the connecting cylinder (10).

3. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 2, characterized in that, The support shell (3) is provided with a large gear (5) and a small gear (7) inside. The large gear (5) is fixedly sleeved on the outer wall of the rotating shaft (13), and the small gear (7) is fixedly sleeved on the outer wall of the oxygen guide tube (6). The large gear (5) and the small gear (7) mesh. The outer wall of the oxygen guide tube (6) is fixedly sleeved with a support ring plate (35). The inner wall of the connecting cylinder (10) is provided with a support ring groove (36). The support ring plate (35) and the support ring groove (36) are rotatably connected.

4. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 2, characterized in that, The protective shell (16) is provided with a large gear (18) and a small gear (17) inside. The large gear (18) is fixedly sleeved on the outer wall of the connecting cylinder (10). The small gear (17) is installed at the bottom end of the rotating shaft (13). The large gear (18) and the small gear (17) mesh. A T-shaped ring plate (11) is installed at the top of the connecting cylinder (10). A T-shaped ring groove (12) is opened at the bottom end of the support frame (2). The T-shaped ring plate (11) and the T-shaped ring groove (12) are rotatably connected.

5. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 2, characterized in that, The oxygen distribution assembly includes two fan-shaped blocking plates (19), which are installed on both sides of the outer wall near the bottom of the connecting cylinder (10). The oxygen main pipe (6) is connected to the two sides near the bottom of the connecting cylinder (10) with oxygen branch pipes (20). Multiple oxygen delivery nozzles (21) are connected to the top of the oxygen branch pipes (20) near the oxygen main pipe (6). Multiple oxygen delivery nozzles (22) are connected to the top of the oxygen branch pipes (20) away from the oxygen main pipe (6). The top of the oxygen delivery nozzles (21) is slidably connected to the bottom of the fan-shaped blocking plates (19). Both sides of the oxygen delivery nozzles (22) are connected to nozzle branch pipes (24). An elastic blocking component is provided at the opening of the nozzle branch pipes (24).

6. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 5, characterized in that, The elastic blocking component includes a blocking block (25), a fixing frame (26) is installed on the outer wall of the nozzle branch pipe (24), the blocking block (25) is engaged in the nozzle branch pipe (24) opening, a limiting rod (27) is installed at the top of the blocking block (25), the limiting rod (27) moves through the top of the fixing frame (26), a spring (28) surrounds the outer wall of the limiting rod (27), and the spring (28) is installed between the top of the inner wall of the fixing frame (26) and the top of the blocking block (25).

7. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 5, characterized in that, A sleeve plate (29) is installed at the top of the blocking plate. A Z-shaped top plate (30) is inserted into the top of the sleeve plate (29). A protrusion (31) is installed at the top of the Z-shaped top plate (30). Multiple protrusions (32) are installed at the bottom of the support frame (14). A spring (34) is connected between the bottom of the Z-shaped top plate (30) and the bottom of the inner wall of the sleeve plate (29).

8. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 7, characterized in that, The protrusion one (31) and protrusion two (32) are positioned opposite each other, and the shapes of both protrusion one (31) and protrusion two (32) are hemispherical.

9. The large-scale silver carp and bighead carp seedling cultivation equipment according to claim 7, characterized in that, The bottom of the inner wall of the sleeve (29) is equipped with a limiting rod (33), which is inserted into the rod groove opened at the bottom of the Z-shaped top plate (30). The spring (34) surrounds the outer wall of the limiting rod (33).

10. A method for cultivating silver carp and bighead carp fry in large waters, characterized in that, Using the large-scale silver carp and bighead carp fry cultivation equipment according to any one of claims 1-9, the large-scale silver carp and bighead carp fry cultivation method includes the following steps: S1: When it is necessary to oxygenate the water in the cultivation net cage (1), first start the aerator (8) and motor (4) in the oxygenation drive assembly; the compressed oxygen generated by the aerator (8) enters the oxygenation main pipe (6) that runs vertically through the support shell (3), support frame one (2) and support frame two (14) through the oxygen delivery pipe (9) and rotary joint. Then the oxygen is diverted into the oxygenation branch pipes (20) on both sides of the bottom of the oxygenation main pipe (6) and finally sprayed out from the oxygen delivery nozzle one (21) and oxygen delivery nozzle two (22) and nozzle branch pipe (24) in the oxygenation assembly, forming a large number of micro bubbles in the cultivation net cage (1), thereby increasing the dissolved oxygen content of the water. S2: In the above process, the output shaft of the motor (4) drives the rotating shaft (13) to rotate. The rotating shaft (13) drives the oxygen guide pipe (6) to rotate at the first speed through the meshing transmission of the large gear (5) and the small gear (7) inside the support shell (3). The oxygen guide pipe (6) obtains active rotation power, which in turn drives the oxygen guide branch pipes (20) on both sides to make circular motion in the horizontal plane, significantly expanding the aeration coverage of the oxygen delivery nozzle (21) and the oxygen delivery nozzle (22). S3: At the same time, the small gear 2 (17) installed at the bottom of the rotating shaft (13) meshes with the large gear 2 (18) fixedly sleeved inside the protective shell (16) on the outer wall of the connecting cylinder (10), thereby driving the connecting cylinder (10) to rotate at the second speed. Due to the difference in the number of teeth of the large and small gears, the speed of the oxygen guiding main pipe (6) is faster than the speed of the connecting cylinder (10), that is, the two form a differential rotation. Fan-shaped blocking plates (19) are installed on both sides of the outer wall near the bottom of the connecting cylinder (10), and multiple oxygen delivery nozzles 1 (21) at the top of the oxygen guiding branch pipe (20) are located below the fan-shaped blocking plate (19) and slide in contact with the bottom of the fan-shaped blocking plate (19). It is precisely because the speed of the oxygen guiding main pipe (6) and the connecting cylinder (10) is different that during continuous rotation, the fan-shaped blocking plate (19) will intermittently cover and block the oxygen delivery nozzles 1 (21). S4: When the fan-shaped blocking plate (19) rotates to directly above the oxygen delivery nozzle (21), the nozzle is temporarily closed, causing the air pressure inside the oxygen delivery branch pipe (20) to rise instantaneously. This pressure boosting effect significantly accelerates the air output rate of the oxygen delivery nozzle (22), thereby enhancing the oxygen supply intensity to the waters surrounding the cultivation cage (1). On the other hand, the increased pressure overcomes the pre-tightening force of the spring (28) of the elastic blocking component at the nozzle branch pipe (24). The pressure pushes the blocking block (25) upward, causing it to no longer close the nozzle branch pipe (24) opening, allowing some oxygen to be ejected from the normally closed nozzle branch pipe (24) to further supplement the oxygen demand of the surrounding waters. S5: When the fan-shaped blocking plate (19) rotates past the position of the oxygen supply nozzle (21), the nozzle is restored to unobstructed flow, the pressure inside the pipe drops, and the elastic blocking component re-closes the nozzle branch pipe (24) under the action of the spring (28), thereby realizing the periodic dynamic adjustment of the oxygen supply to the center and the periphery, so that the dissolved oxygen distribution in the entire net cage tends to be uniform. S6: In addition, the rotation of the connecting cylinder (10) also causes the sleeve plate (29) installed above the fan-shaped blocking plate (19) and its internal Z-shaped top plate (30) to move in a circular motion together; the top of the Z-shaped top plate (30) is provided with a hemispherical protrusion 1 (31), while the bottom of the support frame 2 (14) is provided with multiple hemispherical protrusions 2 (32) along the circumferential direction. The two are in opposite positions. When the Z-shaped top plate (30) rotates with the connecting cylinder (10) until the protrusion 1 (31) contacts a certain protrusion 2 (32), the protrusion 2 (32) presses down on the protrusion 1 (31), forcing the Z-shaped top plate (30) to overcome the elastic force of the spring 2 (34) along the sleeve plate (29). The inner wall slides downward; when the first protrusion (31) continues to rotate and disengages from the second protrusion (32), the Z-shaped top plate (30) rebounds rapidly upward under the reset action of the second spring (34), thereby repeatedly striking the mesh (15) below the second support frame (14) with its top end. This intermittent impact action causes the mesh (15) to generate high-frequency micro-amplitude vibration, effectively breaking the oxygenation bubbles attached to the lower surface of the mesh (15), preventing the bubbles from accumulating to form large bubbles or remaining in the mesh, ensuring that small bubbles can pass smoothly through the mesh (15) and continue to float to the entire water layer of the cultivation net box (1), thereby further improving the oxygenation efficiency and uniformity.

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