A multi-nutrient level mixed culture device for surface and bottom water culture species

Abstract

The application provides a multi-nutrition level mixed culture device for surface layer and bottom layer aquaculture species, which comprises four fixed piles, a fixed frame is fixedly installed between the top ends of the four fixed piles, longitudinal rods are fixedly arranged between the two sides of the fixed frame corresponding to the fixed piles, a transverse rod is fixedly arranged between the bottom ends of the left and right fixed piles, an adjusting mechanism is arranged on one side of the diagonal fixed piles, and a second lifting frame and a first lifting frame are arranged between the four fixed piles from bottom to top through the adjusting mechanism. The marine space can be fully utilized, the utilization rate of feed is improved, the wind and wave resistance is stronger, and the ecological culture of the surface layer and bottom layer aquaculture species is beneficial.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, specifically to a multi-trophic-level polyculture device for surface and bottom aquaculture species. Background Technology

[0002] my country is the world's largest producer of aquatic products, and there is a high market demand for different types of aquatic products.

[0003] In the prior art, the mixing technology for different aquaculture species mainly includes pond polyculture technology of tilapia and shrimp (invention patent publication number CN101622962), ecological polyculture method of pond swimming crab, Manila clam, and Chinese shrimp (patent application number: CN201010268562.6), and a pond polyculture method of large yellow croaker and swimming crab (authorization announcement number: CN102217566B). Apart from these, no reports have been found on polyculture models for other types of species, especially multi-trophic level polyculture technology based on nearshore and deep-sea aquaculture platforms.

[0004] Therefore, the present invention provides a multi-trophic-level mixed culture aquaculture device for surface and bottom aquatic species. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a multi-trophic-level polyculture device for surface and bottom aquaculture species to solve the problems mentioned in the background technology. This invention can make full use of marine space, improve feed utilization, and carry out disease prevention and control. It has stronger resistance to wind and waves and is conducive to the ecological aquaculture of surface and bottom aquaculture products.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-trophic-level polyculture device for surface and bottom aquaculture species, comprising four fixed piles, a fixed frame fixedly installed between the tops of the four fixed piles, longitudinal rods fixedly installed on both sides of the fixed frame corresponding to the fixed piles, a transverse rod fixedly installed between the bottom ends of the left and right fixed piles, an adjustment mechanism provided on one side of the diagonally opposite fixed piles, a second lifting frame and a first lifting frame respectively arranged from bottom to top between the four fixed piles through the adjustment mechanism, a second net box fixedly installed on the top of the second lifting frame, a first net box fixedly installed inside the second lifting frame, the top of the second net box movably installed inside the first net box, a filter plate installed on the top of the second net box by screws, the adjustment mechanism including a screw rod rotatably installed between the fixed frame and the transverse rod, two diagonally opposite corners of the first and second lifting frames respectively screwed onto the screw rod, a second limiting mechanism provided between the transverse rod and the second lifting frame, and a fixed post fixedly installed at the bottom of the right longitudinal rod.

[0007] Furthermore, a first limiting mechanism is provided between the fixed pile and the first lifting frame and the second lifting frame. The first limiting mechanism includes a sliding groove and a sliding block. The sliding groove is opened inside one end of the fixed pile.

[0008] Furthermore, the sliders are symmetrically fixed on the outer walls of both ends of the first and second lifting frames, and the sliders are limited and slidably disposed inside the slide groove. The first and second lifting frames have the same specifications.

[0009] Furthermore, a first gear is fixedly provided at the top end of the screw, the first gear is rotatably disposed inside the fixed frame, and a second gear is rotatably disposed on one side of the first gear via a rotating rod.

[0010] Furthermore, the first gear and the second gear are arranged parallel to each other and meshing, the rotating rod is rotatably installed inside the top of the two diagonally fixed stakes, and the top of the rotating rod is symmetrically fixed with a handle.

[0011] Furthermore, a limit spring is fixedly installed at the bottom of the fixed frame corresponding to the screw position. The limit spring is located on the outside of the screw. A third limiting mechanism is provided on one side of the rotating rod. The third limiting mechanism includes a limiting rod. The limiting rod is L-shaped, and one end of the limiting rod is slidably installed inside the fixed pile at the corresponding groove position.

[0012] Furthermore, a first spring is fixedly installed between the top end of the limiting rod and the fixed pile, and the first spring is fixedly installed inside the fixed pile. An inclined surface is provided at the bottom of the bottom end of the limiting rod, and the inclined surface is located above the slider.

[0013] Furthermore, fixing plates are symmetrically fixed on both sides of the top of the first net cage, the fixing plates are positioned above the fixing frame, and the first net cage is slidably positioned inside the fixing frame.

[0014] Furthermore, the second limiting mechanism includes a fixing block, which is fixedly disposed on the top of the transverse rod. The fixing block is inserted into the interior of both ends of the second lifting frame. Insert rods are slidably disposed on both sides of the interior of the fixing block. The insert rods are L-shaped. A second spring is fixedly disposed between one end of the insert rod and the inner wall of the fixing block. The other end of the insert rod has symmetrically opened inclined surfaces. Slots are symmetrically opened at the interior of both ends of the second lifting frame corresponding to the positions of the insert rods. One end of the insert rod is inserted into the interior of the slot. The discharge ports are interconnected through protective covers.

[0015] The beneficial effects of the present invention: The present invention provides a multi-trophic-level polyculture device for surface and bottom aquaculture species, comprising fixed piles, longitudinal rods, fixed frames, transverse rods, fixed columns, a second lifting frame, a first lifting frame, a chute, a screw, a rotating rod, a first net cage, a second net cage, a feed pipe, a groove, a limiting rod, a fixed plate, a second limiting mechanism, a filter plate, screws, a protective cover, a feed port, a first spring, a first gear, a second gear, a limiting spring, a fixing block, a second spring, an insert rod, a slot, and a slider.

[0016] 1. This multi-trophic-level polyculture device for surface and bottom aquatic species utilizes a first lifting frame and a second lifting frame, respectively, to set up a second net cage and a first net cage. It leverages the different water layers and similar diets of surface and bottom aquatic species, allowing for separate cultivation in the first and second net cages. This improves the space utilization of the aquaculture system. The adjustable lifting mechanism allows for easy raising of the first and second net cages. When the first net cage cannot be moved, the second net cage continues to rise, using a filter plate to push the surface aquatic species upwards within the first net cage, facilitating harvesting. Removing the filter plate allows for easy harvesting of bottom aquatic species within the second net cage, further improving harvesting efficiency. Since the surface aquatic species are above the bottom aquatic species, the feed from the submerged surface aquatic species can be utilized by the bottom aquatic species, increasing feed utilization.

[0017] 2. This multi-trophic-level polyculture device for surface and bottom aquaculture species uses a first limiting mechanism, such as a chute and a slider, to limit the first and second lifting frames, thereby improving their stability. A second limiting mechanism, such as a rod, a second spring, and a slot, limits the second lifting frame, further improving its stability. A third limiting mechanism, such as a limiting rod and a first spring, limits the first lifting frame and the first net cage after it reaches the top, improving their stability and facilitating subsequent adjustments to the second net cage and the second lifting frame.

[0018] 3. This multi-trophic-level polyculture device for surface and bottom aquatic species is reinforced by longitudinal rods, transverse rods, and a fixed frame. A fixed column at the bottom of the right-side longitudinal rod provides secondary reinforcement, enhancing the system's stability. A protective cover, feed pipe, and feed inlet allow for the addition of feed for bottom-level aquatic species into the second net cage. The protective cover seals the feed inlet to prevent escape. Grooves facilitate the sliding and lifting of the protective cover and the second lifting frame, preventing interference and allowing for easy adjustment of the second net cage. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of a multi-trophic-level polyculture device for surface and bottom aquaculture species according to the present invention.

[0020] Figure 2 This is a diagram of the fixed pile installation structure of a multi-trophic-level polyculture device for surface and bottom aquatic species according to the present invention.

[0021] Figure 3 This is a front cross-sectional view of a multi-trophic-level polyculture device for surface and bottom aquatic species according to the present invention.

[0022] Figure 4 This invention relates to a multi-trophic-level polyculture device for surface and bottom aquaculture species. Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This invention relates to a multi-trophic-level polyculture device for surface and bottom aquaculture species. Figure 3 Enlarged view at point B in the middle;

[0024] Figure 6 This is a cross-sectional view of the first and second net cages in a multi-trophic-level polyculture device for surface and bottom aquaculture species according to the present invention.

[0025] Figure 7 This is a structural diagram of the first lifting frame of a multi-trophic-level polyculture device for surface and bottom aquatic species according to the present invention.

[0026] Figure 8 This is a structural diagram of a multi-trophic-level polyculture aquaculture device for surface and bottom aquatic species of the present invention upon receipt.

[0027] Figure 9 This is a structural diagram of the second lifting frame and the second limiting mechanism of a multi-trophic-level mixed aquaculture device for surface and bottom aquatic species according to the present invention.

[0028] In the diagram: 1. Fixed pile; 2. Longitudinal rod; 3. Fixed frame; 4. Transverse rod; 5. Fixed column; 6. Second lifting frame; 7. First lifting frame; 8. Slide groove; 9. Screw; 10. Rotating rod; 11. First mesh box; 12. Second mesh box; 13. Discharge pipe; 14. Groove; 15. Limiting rod; 16. Fixed plate; 17. Second limiting mechanism; 18. Filter plate; 19. Screw; 20. Protective cover; 21. Discharge port; 22. First spring; 23. First gear; 24. Second gear; 25. Limiting spring; 26. Fixed block; 27. Second spring; 28. Insert rod; 29. ​​Slot; 30. Slider. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Please see Figures 1 to 9 This invention provides a technical solution: a multi-trophic-level polyculture device for surface and bottom aquaculture species, comprising four fixed piles 1, a fixed frame 3 fixedly installed between the tops of the four fixed piles 1, longitudinal rods 2 fixedly installed on both sides of the fixed frame 3 corresponding to the fixed piles 1, transverse rods 4 fixedly installed between the bottom ends of the left and right fixed piles 1, an adjustment mechanism provided on one side of the diagonally opposite fixed piles 1, and a second lifting frame 6 and a first lifting frame 7 respectively arranged from top to bottom between the four fixed piles 1 through the adjustment mechanism, a second net cage 12 fixedly installed on the top of the second lifting frame 6, a first net cage 11 fixedly installed inside the first lifting frame 7, and the top of the second net cage 12 movably installed inside the first net cage 11. The first net cage 11 and the second net cage 12 are equipped with a filter plate 18 by screws 19. The adjustment mechanism includes a screw 9, which is rotatably installed between the fixed frame 3 and the transverse rod 4. The first lifting frame 7 and the second lifting frame 6 are screwed onto the screw 9 at two opposite corners. A second limiting mechanism 17 is provided between the transverse rod 4 and the second lifting frame 6. A fixed post 5 is fixedly installed at the bottom of the right longitudinal rod 2. The fixed post 1 can be reinforced by the transverse rod 4, the longitudinal rod 2, the fixed post 5 and the fixed frame 3, thereby improving the stability of the system. The filter plate 18 can isolate the first net cage 11 and the second net cage 12, making it convenient to use the first net cage 11 and the second net cage 12 for the farming of large yellow croaker and swimming crab.

[0031] In this embodiment, a first limiting mechanism is provided between the fixed pile 1 and the first lifting frame 7 and the second lifting frame 6. The first limiting mechanism includes a sliding groove 8 and a slider 30. The sliding groove 8 is opened inside one end of the fixed pile 1. The slider 30 is symmetrically fixed on the outer walls of both ends of the first lifting frame 7 and the second lifting frame 6. The slider 30 is limited and slidably disposed inside the sliding groove 8. The first lifting frame 7 and the second lifting frame 6 have the same specifications. The limiting effect of the sliding groove 8 and the slider 30 can improve the stability of the first lifting frame 7 and the second lifting frame 6, and facilitate the lifting and adjusting of the first lifting frame 7 and the second lifting frame 6.

[0032] In this embodiment, a first gear 23 is fixedly mounted on the top of the screw 9. The first gear 23 is rotatably mounted inside the fixed frame 3. A second gear 24 is rotatably mounted on one side of the first gear 23 via a rotating rod 10. The first gear 23 and the second gear 24 are parallel to each other and mesh with each other. The rotating rod 10 is rotatably mounted inside the tops of two diagonally opposite fixed posts 1. A handle is symmetrically fixedly mounted on the top of the rotating rod 10. A limit spring 25 is fixedly mounted on the bottom of the fixed frame 3 at the position corresponding to the screw 9. The limit spring 25 is located on the outside of the screw 9. A third limiting mechanism is provided on one side of the rotating rod 10. The third limiting mechanism includes a limiting rod 15. The limiting rod 15 is L-shaped. One end of the limiting rod 15 is slidably mounted inside the fixed post 1 at the position corresponding to the sliding groove 8. A first spring 22 is fixedly mounted between the top of the limiting rod 15 and the fixed post 1. The first spring 22 is fixedly mounted inside the fixed post 1. The bottom of the rod 15 has a slope, which is located above the slider 30. The second gear 24 can be rotated and adjusted by the handle and the rotating rod 10. The engagement of the second gear 24 and the first gear 23 allows the screw 9 to be rotated and adjusted. This facilitates the raising and lowering of the first lifting frame 7 and the second lifting frame 6 by the screwing action of the screw 9 with them. The limiting rod 15 can limit the first lifting frame 7 after it has been moved to the top, and then the second lifting frame 6 can be adjusted downwards. After the limiting rod 15 is removed from the bottom of the slider 30, it is convenient to lower the first lifting frame 7 and the second lifting frame 6 simultaneously. The limiting spring 25 ensures that after the limiting rod 15 is separated from the first lifting frame 7, the first lifting frame 7 remains in contact with the threaded area on the screw 9 under the elastic force of the limiting spring 25. This allows the threaded area to engage with the first lifting frame 7 by screwing when the screw 9 is rotated in the opposite direction, and the first lifting frame 7 can be lowered.

[0033] In this embodiment, fixing plates 16 are symmetrically fixed on both sides of the top of the first net cage 11. The fixing plates 16 are located above the fixing frame 3. The first net cage 11 is slidably disposed inside the fixing frame 3. The fixing plates 16 can limit the position of the first net cage 11, and the fixing frame 3 and the first net cage 11 can limit each other, which can improve the stability of the first net cage 11.

[0034] In this embodiment, the second limiting mechanism 17 includes a fixing block 26, which is fixedly disposed on the top of the transverse rod 4. The fixing block 26 is inserted into the interior of both ends of the second lifting frame 6. Insert rods 28 are slidably disposed on both sides of the interior of the fixing block 26. The insert rods 28 are L-shaped. A second spring 27 is fixedly disposed between one end of the insert rod 28 and the inner wall of the fixing block 26. The other end of the insert rod 28 is symmetrically provided with inclined surfaces. Slots 29 are symmetrically provided at the interior of both ends of the second lifting frame 6 corresponding to the positions of the insert rods 28. One end of the insert rod 28 is inserted into the interior of the slot 29. When the second lifting frame 6 descends, the fixing block 26 can be inserted into the interior of both ends of the second lifting frame 6 and squeezed by the inclined surfaces, so that the insert rod 28 moves inside the fixing block 26 and compresses the second spring 27. The insert rod 28 can be stuck inside the slot 29 under the elastic force of the second spring 27, thereby limiting the second lifting frame 6 and improving the stability of the second lifting frame 6.

[0035] In this embodiment, a feeding mechanism is provided inside the fixed column 5. The feeding mechanism includes a discharge pipe 13, the bottom end of which is fixedly connected to the interior of the fixed column 5. A protective cover 20 is fixedly provided at the bottom end of the discharge pipe 13. A discharge port 21 is fixedly provided inside one end of the second mesh box 12 at the position corresponding to the protective cover 20. The discharge port 21 is located below the filter plate 18. A groove 14 is provided at one end of the second lifting frame 6 at the position corresponding to the protective cover 20. The fixed pile 1 and the fixed column... The bottom ends of 5 are all fixedly installed on the seabed. The feed inlets 21 are interconnected through the protective covers 20. When the second net cage 12 moves up and down, the protective covers 20 can enter and exit from the inside of the groove 14 to avoid affecting the raising and lowering of the second net cage 12. The protective covers 20 can seal the feed inlets 21 to prevent the bottom-cultured species from escaping. Feed can be added to the inside of the second net cage 12 through the feed pipe 13, the protective covers 20 and the feed inlets 21. The inner wall of one side of the groove 14 and the outer wall of one side of the second net cage 12 are in the same vertical plane.

[0036] When using this multi-trophic-level polyculture system for surface and bottom aquaculture species, the feed inlet 21, protective cover 20, and feed pipe 13 are sequentially interconnected. A piling machine is used to insert the fixed piles 1 and fixed posts 5 into the seabed, penetrating more than 10 meters into the seabed mud. The first net cage 11 uses an escape-proof net with a mesh size of 2-6 cm, and the second net cage 12 uses a square-mesh copper alloy mesh. Copper alloy mesh has natural anti-parasite and anti-adhesion capabilities, resulting in fewer attached organisms and less water flow resistance, greatly improving the system's resistance to wind and waves. A fixed frame 3 is fixedly installed inside the top of the fixed pile 1. Longitudinal rods 2 are fixedly installed on both sides of the fixed frame 3 between the fixed piles 1, and transverse rods 4 are fixedly installed between the bottom ends of the two fixed piles 1 on the left and right sides. The fixed frame 3, longitudinal rods 2, and transverse rods 4 reinforce the fixed piles 1, improving the system's stability. Bottom-cultured species are then placed inside the second net cage 12 for cultivation. The first net cage 11 and the second net cage 12 are separated by a filter plate 18 installed on top of the second net cage 12 with screws 19. The large yellow croaker is placed inside the first net cage 11 for cultivation. The feed inlet 21 is opposite to the protective cover 20. Feed for the surface cultured species is added to the inside of the first net cage 11. After the feed for the surface cultured species sinks to the bottom, it will enter the inside of the second net cage 12 through the filter plate 18 and continue to be used by the bottom cultured species. This can increase the utilization rate of feed and reduce feed waste. Furthermore, the stratified cultivation of large yellow croaker and bottom cultured species can make full use of the cultivation space. The first net cage 11 and the second net cage 12 are set in the sea, and various small marine fish and benthic organisms can enter the inside of the first net cage 11 and the second net cage 12 to become natural food for the surface cultured species and the bottom cultured species, further reducing the amount of feed required and facilitating the ecological cultivation of the surface cultured species and the bottom cultured species.When fishing is needed, the handle is used to rotate the rotating rod 10. The rotating rod 10 drives the second gear 24 to rotate and adjust. The meshing of the second gear 24 and the first gear 23 drives the screw 9 to rotate. The screw 9 screws together and drives the first lifting frame 7 and the second lifting frame 6 to move up and down synchronously. The second lifting frame 6 drives the second net box 12 to move upward, and the first lifting frame 7 drives the first net box 11 to move upward. The filter plate 18 moves upward with the second net box 12. The top of the second net box 12 and the filter plate 18 are always inside the first net box 11. The second lifting frame 6 and the first lifting frame 7 rise stably through the limiting action of the slider 30 and the slide groove 8. When the first lifting frame 7 moves upward, the sliders 30 on both sides will squeeze the inclined surface of the limiting rod 15. The limiting rod 15 stretches the first spring 22, causing the limiting rod 15 to retract into the fixed pile 1. At the same time, the slider 30 squeezes the limiting spring 25 on the outer side of the top of the screw 9. After the slider 30 slides past the limiting rod 15, the limiting rod 15 stops below the slider 30 under the tension of the first spring 22, which facilitates the limiting of the bottom of the first lifting frame 7, making the first lifting frame 7 unable to rise or fall. Meanwhile, the second lifting frame 6 continues to move upward under the screw action of the screw 9, and simultaneously drives the second net box 12 and the filter plate 18 to move upward inside the first net box 11. Since the first lifting frame 7 and the first net box 11 cannot move, while the second net box 12 and the filter plate 18 continue to move upward, the space at the top of the first net box 11 becomes smaller. The filter plate 18 can squeeze the aquatic products inside the first net box 11 upward, thus facilitating the harvesting of the aquatic products inside the first net box 11. When the second lifting frame 6 rises to the highest point, that is, after it is in contact with the bottom of the first lifting frame 7, the filter plate 18 moves to the highest position with the second net box 12. The screw 19 and the filter plate 18 are then removed to harvest the aquatic products at the bottom of the second net box 12.After harvesting, the handle is turned in the opposite direction by rotating the rotating rod 10. This, along with the action of the rotating rod 10, the second gear 24, and the first gear 23, causes the screw 9 to rotate in the opposite direction. The screw 9 then drives the second lifting frame 6 and the second net cage 12 downwards into the seawater. At this point, due to the limiting rod 15, the first lifting frame 7 and the first net cage 11 remain stationary. When the second lifting frame 6 and the second net cage 12 descend to a certain height, the two limiting rods 15 are pulled to the sides, separating them from the slider 30. The first lifting frame 7 remains in contact with the threaded part of the screw 9 under the elastic force of the limiting spring 25. As the screw 9 rotates, the screw... Rod 9 can lower the first lifting frame 7 and the first net cage 11 into the seawater. The fixed plate 16 can limit the movement of the first net cage 11. After the second lifting frame 6 descends to the bottom, the fixed block 26 can be inserted into the interior of both ends of the second lifting frame 6. The second lifting frame 6 then presses against the insert rod 28 at an angle. The insert rod 28 moves into the fixed block 26 and compresses the second spring 27. Subsequently, under the elastic force of the second spring 27, the insert rod 28 is inserted into the slot 29, which limits the movement of the second lifting frame 6, improving its stability and facilitating continued ecological aquaculture of surface and bottom-layer aquaculture species.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-trophic-level polyculture device for surface and bottom aquaculture species, comprising four fixed piles (1), characterized in that, A fixed frame (3) is fixedly installed between the tops of the four fixed piles (1). Longitudinal rods (2) are fixedly installed on both sides of the fixed frame (3) between the fixed piles (1). A transverse rod (4) is fixedly installed between the bottom ends of the left and right fixed piles (1). An adjustment mechanism is provided on one side of the diagonal fixed piles (1). A second lifting frame (6) and a first lifting frame (7) are respectively installed between the four fixed piles (1) from bottom to top through the adjustment mechanism. A second net box (12) is fixedly installed on the top of the second lifting frame (6). A first net box (11) is fixedly installed inside the first lifting frame (7). The top of the second net box (12) is movably disposed inside the first net box (11). The top of the second net box (12) is fitted with a filter plate (18) by screws (19). The adjusting mechanism includes a screw (9), which is rotatably mounted between the fixed frame (3) and the transverse rod (4). The two opposite corners of the first lifting frame (7) and the second lifting frame (6) are screwed onto the screw (9). A second limiting mechanism (17) is provided between the transverse rod (4) and the second lifting frame (6). A fixed column (5) is fixedly provided at the bottom of the right longitudinal rod (2). The screw ( A first gear (23) is fixedly installed at the top of the fixed frame (3). The first gear (23) is rotatably installed inside the fixed frame (3). A second gear (24) is rotatably installed on one side of the first gear (23) via a rotating rod (10). The first gear (23) and the second gear (24) are parallel to each other and mesh with each other. The rotating rod (10) is rotatably installed inside the top of the two diagonally opposite fixed posts (1). A handle is symmetrically fixed at the top of the rotating rod (10). A limit spring (25) is fixedly installed at the bottom of the fixed frame (3) at the position corresponding to the screw (9). The limit spring (25) The third limiting mechanism is provided on one side of the rotating rod (10) and includes a limiting rod (15). The limiting rod (15) is L-shaped. One end of the limiting rod (15) is slidably disposed inside the fixed pile (1) at the position corresponding to the sliding groove (8). A first spring (22) is fixedly disposed between the top end of the limiting rod (15) and the fixed pile (1). The first spring (22) is fixedly disposed inside the fixed pile (1). An inclined surface is provided at the bottom of the bottom end of the limiting rod (15). The inclined surface is disposed above the slider (30).

2. The multi-trophic-level polyculture device for surface and bottom aquaculture species according to claim 1, characterized in that: A first limiting mechanism is provided between the fixed pile (1) and the first lifting frame (7) and the second lifting frame (6). The first limiting mechanism includes a sliding groove (8) and a slider (30). The sliding groove (8) is opened inside one end of the fixed pile (1).

3. The multi-trophic-level polyculture device for surface and bottom aquaculture species according to claim 2, characterized in that: The slider (30) is symmetrically fixed on the outer walls of the first lifting frame (7) and the second lifting frame (6) at both ends. The slider (30) is limited to sliding inside the slide groove (8). The first lifting frame (7) and the second lifting frame (6) have the same specifications.

4. The multi-trophic-level polyculture device for surface and bottom aquaculture species according to claim 1, characterized in that: The first net cage (11) is symmetrically fixed with fixing plates (16) on both sides of the top. The fixing plates (16) are set above the fixing frame (3). The first net cage (11) is slidably set inside the fixing frame (3).

5. The multi-trophic-level polyculture device for surface and bottom aquaculture species according to claim 1, characterized in that: The second limiting mechanism (17) includes a fixing block (26), which is fixedly installed on the top of the horizontal bar (4). The fixing block (26) is inserted into the interior of both ends of the second lifting frame (6). The fixing block (26) has a sliding insertion rod (28) on both sides inside the fixing block (26). The insertion rod (28) is L-shaped. A second spring (27) is fixed between one end of the insertion rod (28) and the inner wall of the fixing block (26). The other end of the insertion rod (28) has a symmetrical inclined surface. The interior of both ends of the second lifting frame (6) has a symmetrical slot (29) corresponding to the position of the insertion rod (28). One end of the insertion rod (28) is inserted into the interior of the slot (29).

6. The multi-trophic-level polyculture device for surface and bottom aquaculture species according to claim 1, characterized in that: The fixed column (5) is equipped with a feeding mechanism, which includes a discharge pipe (13). The bottom end of the discharge pipe (13) is fixedly equipped with the interior of the fixed column (5). The bottom end of the discharge pipe (13) is fixedly equipped with a protective cover (20). The interior of one end of the second net cage (12) is fixedly equipped with a discharge port (21) corresponding to the position of the protective cover (20). The discharge port (21) is located below the filter plate (18). One end of the second lifting frame (6) is provided with a groove (14) corresponding to the position of the protective cover (20). The bottom ends of the fixed pile (1) and the fixed column (5) are both fixedly installed on the seabed. The discharge port (21) is connected to each other through the protective cover (20).

Images