Multi-nutrition-level polyculture device for surface-layer and bottom-layer aquaculture varieties

Abstract

The invention provides a multi-nutrition-level polyculture device for surface and bottom aquaculture varieties, which comprises four fixing piles, a fixing frame is fixedly mounted among the top ends of the four fixing piles, longitudinal rods are fixedly arranged on the two sides of the fixing frame and correspond to the positions between the fixing piles, and the longitudinal rods are fixedly connected with the fixing piles. A transverse rod is fixedly arranged between the bottom ends of the left fixing pile and the right fixing pile, an adjusting mechanism is arranged on one side of the diagonal fixing pile, and a second lifting frame and a first lifting frame are arranged among the four fixing piles from bottom to top through the adjusting mechanism. The marine space can be fully utilized, the utilization rate of feed is increased, the storm resistance is higher, and ecological breeding of aquaculture varieties on the surface layer and the bottom layer is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a multi-nutrient level mixed culture device for surface and bottom aquaculture species. Background Art

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

[0003] In the prior art, the mixing technology of different types of aquaculture species mainly includes the pond polyculture technology of tilapia and shrimp (invention patent application number CN101622962), the ecological polyculture method of swimming crab, Manila clam and Chinese shrimp in ponds (patent application number: CN201010268562.6), and a pond polyculture method of large yellow croaker and swimming crab (authorization announcement number: CN102217566B). In addition, there are no reports on the polyculture mode of other types of species, especially the multi-trophic level polyculture technology based on offshore and deep-sea aquaculture platforms.

[0004] To this end, the present invention provides a multi-nutrient level mixed culture device for surface and bottom aquaculture species. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a multi-trophic level mixed culture device for surface and bottom aquaculture species to solve the problems raised in the above-mentioned background technology. The present invention can make full use of the ocean space, improve the utilization rate of feed, and can carry out disease prevention and control, and has stronger resistance to wind and waves, which is beneficial to the ecological cultivation of surface and bottom aquaculture products.

[0006] In order to achieve the above-mentioned object, the present invention is realized by the following technical scheme: a multi-trophic level polyculture breeding device for surface and bottom aquaculture species, comprising four fixed piles, a fixed frame is fixedly installed between the tops of the four fixed piles, longitudinal rods are fixedly installed between the corresponding fixed piles on both sides of the fixed frame, a transverse rod is fixedly installed between the bottom ends of the left and right fixed piles, an adjustment mechanism is arranged on one side of the diagonal fixed piles, a second lifting frame and a first lifting frame are respectively arranged from bottom to top between the four fixed piles through the adjustment mechanism, a second net box is fixedly installed on the top of the second lifting frame, a first net box is fixedly installed inside the second lifting frame, the top of the second net box is movably arranged inside the first net box, a filter plate is installed on the top of the second net box by screws, the adjustment mechanism comprises a screw rod, the screw rod is rotatably installed between the fixed frame and the transverse rod, two diagonal angles of the first lifting frame and the second lifting frame are respectively screwed and installed on the screw rod, a second limiting mechanism is arranged between the transverse rod and the second lifting frame, and a fixed column is fixedly arranged at the bottom of the longitudinal rod on the right side.

[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 comprises a slide groove and a slider. The slide groove is provided inside one end of the fixed pile.

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

[0009] Furthermore, a first gear is fixedly provided at the top end of the screw rod, the first gear is rotatably provided inside the fixed frame, and a second gear is rotatably provided 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 with each other, the rotating rod is rotatably installed inside the top ends of two diagonal fixed piles, and handles are symmetrically fixedly arranged on the top ends of the rotating rods.

[0011] Furthermore, a limit spring is fixedly arranged at the bottom of the fixed frame at the position corresponding to the screw rod, and the limit spring is arranged on the outside of the screw rod. A third limit mechanism is arranged on one side of the rotating rod, and the third limit mechanism includes a limit rod, and the limit rod is in an "L" shape. One end of the limit rod is slidably arranged at the corresponding slide groove position inside the fixed pile.

[0012] Furthermore, a first spring is fixedly arranged between the top end of the limiting rod and the fixing pile, the first spring is fixedly arranged inside the fixing pile, and an inclined surface is arranged at the bottom of the bottom end of the limiting rod, and the inclined surface is arranged above the sliding block.

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

[0014] Furthermore, the second limiting mechanism includes a fixed block, which is fixedly arranged on the top of the transverse rod, and the fixed block is plugged into the inside of the two ends of the second lifting frame. Insert rods are provided on both sides of the interior of the fixed block for limiting sliding. The shape of the insert rod is "L" type. A second spring is fixedly arranged between one end of the insert rod and the inner wall of the fixed block. The other end of the insert rod is symmetrically provided with inclined surfaces. Slots are symmetrically provided at the inside of the two ends of the second lifting frame corresponding to the position of the insert rod. One end of the insert rod is plugged into the inside of the slot, and the discharge ports are connected to each other through a protective cover.

[0015] Beneficial effects of the invention: A multi-nutrient level mixed breeding device for surface and bottom aquaculture species of the present invention comprises fixed piles, longitudinal rods, fixed frames, transverse rods, fixed columns, a second lifting frame, a first lifting frame, a slide chute, a screw, a rotating rod, a first net box, a second net box, a discharge pipe, a groove, a limit rod, a fixed plate, a second limit mechanism, a filter plate, a screw, a protective cover, a discharge port, a first spring, a first gear, a second gear, a limit spring, a fixed block, a second spring, a plug rod, a slot, and a slider.

[0016] 1. The multi-trophic level mixed culture device for surface and bottom aquatic culture species is provided with a second net cage and a first net cage on a first lifting frame and a second lifting frame respectively, so that the surface and bottom aquatic culture species can be cultured by using the first net cage and the second net cage respectively by utilizing the characteristics that the surface and bottom aquatic culture species inhabit different water layers and have similar feeding habits, thereby improving the space utilization rate of the culture system, and the lifting and lowering adjustment of the first lifting frame and the second lifting frame by the adjustment mechanism facilitates the first net cage and the second net cage to be lifted upward, when the first net cage cannot move, the second net cage continues to rise, and the surface aquatic culture species inside the first net cage can be squeezed upward by the filter plate, so that the surface aquatic culture species can be caught conveniently; by disassembling the filter plate, the bottom aquatic culture species inside the second net cage can be caught conveniently, thereby improving the fishing efficiency of the surface and bottom aquatic culture species; the surface aquatic culture species are above the bottom aquatic culture species, and the feed of the surface aquatic culture species that sinks underwater can be used by the bottom aquatic culture species, thereby increasing the utilization rate of the feed.

[0017] 2. This multi-trophic level mixed breeding device for surface and bottom aquaculture species can limit the first lifting frame and the second lifting frame through the first limiting mechanisms such as slide grooves and sliders, thereby improving the stability of the first lifting frame and the second lifting frame; the second lifting frame can be limited by the second limiting mechanisms such as plug rods, second springs, and slots, thereby improving the stability of the second lifting frame; the first lifting frame and the first net cage can be limited by the third limiting mechanisms such as limiting rods and first springs after the first net cage rises to the top, thereby improving the stability of the first net cage and the first lifting frame, and facilitating the subsequent lifting and lowering adjustment of the second net cage and the second lifting frame.

[0018] 3. The multi-trophic level mixed breeding device for surface and bottom aquatic species can reinforce the fixed piles by means of the longitudinal rods, transverse rods and fixed frames, and the fixed piles can be reinforced for a second time by means of the fixed columns at the bottom of the right longitudinal rods, thereby improving the stability of the system; the bottom aquatic species feed can be added to the inside of the second net cage by means of the protective cover, the discharge pipe and the discharge port, and the protective cover can close the discharge port to prevent the bottom aquatic species from escaping; the grooves can facilitate the lifting and sliding of the protective cover and the second lifting frame, thereby avoiding interference between the protective cover and the second lifting frame, and facilitating the lifting and adjusting of the second net cage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 This is a structural diagram of the fixed pile installation of a multi-trophic level mixed culture device for surface and bottom aquaculture species of the present invention;

[0021] Figure 3 It is a front cross-sectional view of a multi-trophic level polyculture breeding device for surface and bottom aquaculture species of the present invention;

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

[0023] Figure 5 The invention relates to a multi-nutrient level mixed culture device for surface and bottom aquaculture species. Figure 3 Enlarged view of point B in the middle;

[0024] Figure 6 The cross-sectional structure diagram of the first and second net cages of a multi-trophic level mixed culture device for surface and bottom aquaculture species of the present invention

[0025] Figure 7 This is a structural diagram of the first lifting frame of a multi-trophic level mixed culture device for surface and bottom aquaculture species of the present invention;

[0026] Figure 8 It is a structural diagram of a multi-trophic level polyculture breeding device for surface and bottom aquaculture species of the present invention at the time of delivery;

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

[0028] In the figure: 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 net box; 12. second net box; 13. discharge pipe; 14. groove; 15. limit rod; 16. fixed plate; 17. second limit mechanism; 18. filter plate; 19. screw; 20. protective cover; 21. discharge port; 22. first spring; 23. first gear; 24. second gear; 25. limit spring; 26. fixed block; 27. second spring; 28. plug rod; 29. ​​slot; 30. slider. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] See also Figures 1 to 9 The present invention provides a technical solution: a multi-trophic level polyculture breeding device for surface and bottom aquaculture species, comprising four fixed piles 1, a fixed frame 3 is fixedly installed between the tops of the four fixed piles 1, longitudinal rods 2 are fixedly arranged between the corresponding fixed piles 1 on both sides of the fixed frame 3, a transverse rod 4 is fixedly arranged between the bottom ends of the left and right fixed piles 1, an adjustment mechanism is arranged on one side of the diagonal fixed piles 1, a second lifting frame 6 and a first lifting frame 7 are respectively arranged from top to bottom between the four fixed piles 1 through the adjustment mechanism, a second net box 12 is fixedly arranged on the top of the second lifting frame 6, a first net box 11 is fixedly arranged inside the first lifting frame 7, and the top of the second net box 12 is movably arranged inside the first net box 11 The top of the second net box 12 is provided with a filter plate 18 by means of a screw 19, the adjusting mechanism comprises a screw rod 9, the screw rod 9 is rotatably installed between the fixed frame 3 and the transverse rod 4, the two diagonals of the first lifting frame 7 and the second lifting frame 6 are respectively screwed and installed on the screw rod 9, a second limiting mechanism 17 is arranged between the transverse rod 4 and the second lifting frame 6, a fixing column 5 is fixedly arranged at the bottom of the longitudinal rod 2 on the right side, the fixed pile 1 can be reinforced by means of the transverse rod 4, the longitudinal rod 2, the fixing column 5 and the fixing frame 3, and the stability of the system is improved, the first net box 11 and the second net box 12 can be isolated by means of the filter plate 18, and it is convenient to use the first net box 11 and the second net box 12 for breeding of large yellow croaker and swimming crab.

[0031] In this embodiment, a first limiting mechanism is arranged between the fixed pile 1 and the first lifting frame 7 and the second lifting frame 6. The first limiting mechanism includes a slide groove 8 and a slider 30. The slide groove 8 is opened inside one end of the fixed pile 1. 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 and slidably arranged inside the slide groove 8. The first lifting frame 7 and the second lifting frame 6 have the same specifications. The limiting effect of the slide 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 lowering adjustment of the first lifting frame 7 and the second lifting frame 6.

[0032] In this embodiment, a first gear 23 is fixedly provided at the top of the screw rod 9, and the first gear 23 is rotatably provided inside the fixed frame 3. A second gear 24 is rotatably provided on one side of the first gear 23 through the rotating rod 10. The first gear 23 and the second gear 24 are parallel to each other and meshingly provided. The rotating rod 10 is rotatably installed inside the tops of the two diagonal fixed piles 1. A handle is symmetrically fixedly provided on the top of the rotating rod 10. A limiting spring 25 is fixedly provided at the position of the screw rod 9 at the bottom of the fixed frame 3. The limiting spring 25 is provided on the outside of the screw rod 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 in the shape of an "L". One end of the limiting rod 15 is slidably provided at the position of the corresponding slide groove 8 inside the fixed pile 1. A first spring 22 is fixedly provided between the top of the limiting rod 15 and the fixed pile 1. The first spring 22 is fixedly provided inside the fixed pile 1. The bottom of the bottom end of the rod 15 is provided with an inclined surface, which is provided above the slider 30. The second gear 24 can be rotated and adjusted by the handle and the rotating rod 10, and the screw rod 9 can be rotated and adjusted by the meshing action of the second gear 24 and the first gear 23, so that the first lifting frame 7 and the second lifting frame 6 can be raised and lowered by the screw connection between the screw rod 9 and the first lifting frame 7 and the second lifting frame 6. The limiting rod 15 can be provided to limit the first lifting frame 7 after it moves to the top, and then the second lifting frame 6 can be adjusted downward. After the limiting rod 15 is removed from the bottom of the slider 30, it is convenient to simultaneously adjust the first lifting frame 7 and the second lifting frame 6 downward. The limiting spring 25 can be provided so that after the limiting rod 15 is separated from the first lifting frame 7, the first lifting frame 7 can keep in contact with the threaded area on the screw rod 9 under the elastic force of the limiting spring 25, so that when the screw rod 9 is rotated in the opposite direction, the threaded area and the first lifting frame 7 can be screwed together, and the first lifting frame 7 can be adjusted downward.

[0033] In this embodiment, fixing plates 16 are symmetrically fixed on both sides of the top of the first net box 11, and the fixing plates 16 are arranged above the fixing frame 3. The first net box 11 is slidably arranged inside the fixing frame 3. The first net box 11 can be limited by the set fixing plates 16, and the fixing frame 3 and the first net box 11 can be limited to each other, so as to improve the stability of the first net box 11.

[0034] In this embodiment, the second limiting mechanism 17 includes a fixed block 26, which is fixedly arranged on the top of the transverse rod 4, and the fixed block 26 is inserted and installed in the two ends of the second lifting frame 6. Rods 28 are provided on both sides of the fixed block 26 for limiting sliding. The shape of the rod 28 is "L"-shaped, and a second spring 27 is fixedly arranged between one end of the rod 28 and the inner wall of the fixed block 26. The other end of the rod 28 is symmetrically provided with inclined surfaces, and slots 29 are symmetrically provided at the two ends of the second lifting frame 6 at the positions corresponding to the rod 28. One end of the rod 28 is inserted and installed in the slot 29. When the second lifting frame 6 descends, the fixed block 26 can be inserted into the two ends of the second lifting frame 6, and the rod 28 is squeezed by the inclined surface, so that the rod 28 moves in the fixed block 26 and compresses the second spring 27, and the rod 28 can be stuck in the slot 29 under the elastic force of the second spring 27, so that the second lifting frame 6 can be limited and the stability of the second lifting frame 6 is improved.

[0035] In this embodiment, a feeding mechanism is provided inside the fixed column 5, and the feeding mechanism includes a discharge pipe 13, the bottom end of the discharge pipe 13 is fixedly provided with the inside of the fixed column 5, and the bottom end of the discharge pipe 13 is fixedly provided with a protective cover 20, and a discharge port 21 is fixedly provided inside one end of the second net box 12 at a position corresponding to the protective cover 20, and the discharge port 21 is arranged below the filter plate 18, and a groove 14 is provided at one end of the second lifting frame 6 at a position corresponding to the protective cover 20. The fixed pile 1 and the fixed column 5 are fixedly installed on the seabed, the discharge port 21 is interconnected through the protective cover 20, when the second net box 12 is lifted and moved, the protective cover 20 can enter and exit from the inside of the groove 14 to avoid affecting the lifting of the second net box 12, the protective cover 20 can close the discharge port 21 to prevent the bottom culture species from escaping, and feed can be added to the inside of the second net box 12 through the discharge pipe 13, the protective cover 20 and the discharge port 21, and the inner wall of one side of the groove 14 and the outer wall of one side of the second net box 12 are in the same vertical plane.

[0036] When using the multi-trophic level mixed culture device for surface and bottom aquaculture species, the discharge port 21, the protective cover 20, and the discharge pipe 13 are connected to each other in sequence, and the fixed piles 1 and the fixed columns 5 are inserted into the seabed by a pile driver, and penetrate more than 10 meters into the seabed mud. The first net box 11 adopts an anti-escape net with a mesh size of 2-6 cm, and the second net box 12 adopts a copper alloy net with a square mesh size. The copper alloy net has natural anti-parasitic and anti-adhesion capabilities. There are fewer attachments on the copper alloy net, and the water flow resistance is small, which greatly improves the system's wind and wave resistance; and a fixed frame 3 is fixedly installed inside the top of the fixed pile 1, and longitudinal rods 2 are fixedly installed between the corresponding fixed piles 1 on both sides of the fixed frame 3, and transverse rods 4 are fixedly arranged between the bottom ends of the two fixed piles 1 on the left and right sides. The fixed frame 3, the longitudinal rods 2 and the transverse rods 4 can reinforce the fixed piles 1 to improve the stability of the system; the bottom culture species are placed in the second net box 12 for culture Breeding, and installing a filter plate 18 on the top of the second net box 12 by screws 19, separating the first net box 11 and the second net box 12 by the filter plate 18, putting the large yellow croaker into the first net box 11 for breeding, the discharge port 21 is opposite to the protective cover 20, adding feed of the surface breeding species into the first net box 11, and after the feed of the surface breeding species sinks underwater, it will enter the interior of the second net box 12 through the filter plate 18 and continue to be used by the bottom breeding species, which can increase the utilization rate of the feed and reduce the waste of the feed. In addition, the large yellow croaker and the bottom breeding species are layered and cultured, which can make full use of the breeding space. The first net box 11 and the second net box 12 are set in the sea, and various small marine fish and benthic organisms can enter the interior of the first net box 11 and the second net box 12, becoming natural bait for the surface breeding species and the bottom breeding species, further reducing the feeding amount of the feed, and facilitating the ecological breeding of the surface breeding species and the bottom breeding species;When fishing is needed, the rotating rod 10 is rotated by the handle, and the rotating rod 10 drives the second gear 24 to rotate and adjust, and the meshing action of the second gear 24 and the first gear 23 drives the screw rod 9 to rotate, and the screw rod 9 is screwed to drive the first lifting frame 7 and the second lifting frame 6 to move synchronously, and 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, and the filter plate 18 moves upward at the same time as the second net box 12, and the top of the second net box 12 and the filter plate 18 are always inside the first net box 11, and the second lifting frame 6 and the first lifting frame 7 are stably raised by the limiting action of the slider 30 and the slide groove 8, and when the first lifting frame 7 moves upward, the sliders 30 on both sides thereof will squeeze the inclined surface of the limiting rod 15, and the limiting rod 15 stretches the first spring 22, so that the limiting rod 15 retracts to the inside of the fixed pile 1, and at the same time, the slider 30 squeezes the limiting spring 25 on the outer side of the top of the screw rod 9. After the slider 30 slides over the limiting rod 15, the limiting rod 15 is blocked under the slider 30 under the pulling force of the first spring 22, so as to limit the bottom of the first lifting frame 7, so that the first lifting frame 7 cannot be lifted, and the second lifting frame 6 continues to move upward under the screw connection of the screw rod 9, and synchronously 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, and the second net box 12 and the filter plate 18 continue to move upward, the space at the upper end of the first net box 11 becomes smaller, and the filter plate 18 can squeeze the aquaculture products inside the first net box 11 to the upper end, so as to facilitate the capture of the aquaculture products inside the first net box 11; when the second lifting frame 6 rises to the highest point, that is, fits with the bottom of the first lifting frame 7, the filter plate 18 moves to the highest position with the second net box 12, and the screws 19 and the filter plate 18 are removed to capture the aquaculture products at the bottom of the second net box 12;After the fishing is completed, the rotating rod 10 is rotated in the opposite direction by the handle, and the screw rod 9 is driven to rotate in the opposite direction through the action of the rotating rod 10, the second gear 24 and the first gear 23. The screw rod 9 is screwed to drive the second lifting frame 6 and the second net box 12 to move downward and enter the sea water. At this time, due to the limitation of the limit rod 15, the first lifting frame 7 and the first net box 11 are fixed. When the second lifting frame 6 and the second net box 12 are lowered to a certain height, the two limit rods 15 are pulled to both sides respectively, so that the limit rods 15 are separated from the slider 30, and the first lifting frame 7 keeps in contact with the thread on the screw rod 9 under the elastic force of the limit spring 25. As the screw 9 rotates, the screw The rod 9 can drive the first lifting frame 7 and the first net box 11 to descend and enter the seawater. The fixed plate 16 can limit the first net box 11. After the second lifting frame 6 descends to the bottom, the fixed block 26 can be inserted into the two ends of the second lifting frame 6, and the second lifting frame 6 squeezes the insertion rod 28 through the inclined surface. The insertion rod 28 moves into the inside of the fixed block 26 and compresses the second spring 27. Then the insertion rod 28 is inserted into the inside of the slot 29 under the elastic force of the second spring 27, which can limit the second lifting frame 6, improve the stability of the second lifting frame 6, and facilitate the continued ecological breeding of surface breeding species and bottom breeding species. ;

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes 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 fixing frame (3) is fixedly installed between the top ends of the four fixing piles (1), longitudinal rods (2) are fixedly arranged between the corresponding fixing piles (1) on both sides of the fixing frame (3), a transverse rod (4) is fixedly arranged between the bottom ends of the left and right fixing piles (1), an adjustment mechanism is arranged on one side of the diagonal fixing pile (1), and a second lifting frame (6) and a first lifting frame (7) are respectively arranged from bottom to top between the four fixing piles (1) through the adjustment mechanism, a second net box (12) is fixedly arranged on the top of the second lifting frame (6), and a first net box (12) is fixedly arranged inside the first lifting frame (7) 11), the top of the second net box (12) is movably arranged inside the first net box (11), a filter plate (18) is installed on the top of the second net box (12) by means of a screw (19), the adjustment mechanism comprises a screw rod (9), the screw rod (9) is rotatably installed between the fixed frame (3) and the transverse rod (4), the two diagonal corners of the first lifting frame (7) and the second lifting frame (6) are respectively screwed and installed on the screw rod (9), a second limiting mechanism (17) is arranged between the transverse rod (4) and the second lifting frame (6), and a fixing column (5) is fixedly arranged at the bottom of the right longitudinal rod (2).

2. A 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), wherein the first limiting mechanism comprises a slide groove (8) and a slider (30), wherein the slide groove (8) is provided inside one end of the fixed pile (1).

3. A multi-trophic level polyculture device for surface and bottom aquaculture species according to claim 2, characterized in that: The slider (30) is symmetrically fixedly arranged on the outer walls at both ends of the first lifting frame (7) and the second lifting frame (6), and the slider (30) is limitedly slidably arranged 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: A first gear (23) is fixedly arranged at the top end of the screw rod (9), the first gear (23) is rotatably arranged inside the fixed frame (3), and a second gear (24) is rotatably arranged on one side of the first gear (23) via a rotating rod (10).

5. A multi-trophic level polyculture device for surface and bottom aquaculture species according to claim 4, characterized in that: The first gear (23) and the second gear (24) are arranged parallel to each other and meshingly, the rotating rod (10) is rotatably mounted inside the top ends of two diagonally fixed piles (1), and a handle is symmetrically fixed at the top end of the rotating rod (10).

6. A multi-trophic level polyculture device for surface and bottom aquaculture species according to claim 5, characterized in that: A limit spring (25) is fixedly arranged at the bottom of the fixed frame (3) at a position corresponding to the screw rod (9), and the limit spring (25) is arranged on the outside of the screw rod (9). A third limit mechanism is arranged on one side of the rotating rod (10), and the third limit mechanism comprises a limit rod (15). The limit rod (15) is in an "L" shape, and one end of the limit rod (15) is slidably arranged at a position corresponding to the slide groove (8) inside the fixed pile (1).

7. A multi-trophic level polyculture device for surface and bottom aquaculture species according to claim 6, characterized in that: A first spring (22) is fixedly arranged between the top end of the limiting rod (15) and the fixed pile (1), and the first spring (22) is fixedly arranged inside the fixed pile (1). An inclined surface is arranged at the bottom of the bottom end of the limiting rod (15), and the inclined surface is arranged above the sliding block (30).

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

9. The multi-trophic level polyculture device for surface and bottom aquaculture species according to claim 1, characterized in that: The second limiting mechanism (17) comprises a fixed block (26), wherein the fixed block (26) is fixedly arranged on the top of the transverse rod (4), and the fixed block (26) is inserted and installed inside the two ends of the second lifting frame (6), and the inner sides of the fixed block (26) are provided with insertion rods (28) for limiting sliding, and the shape of the insertion rod (28) is "L"-shaped, and a second spring (27) is fixedly arranged between one end of the insertion rod (28) and the inner wall of the fixed block (26), and the other end of the insertion rod (28) is symmetrically provided with inclined surfaces, and the inner sides of the two ends of the second lifting frame (6) are symmetrically provided with slots (29) corresponding to the positions of the insertion rod (28), and one end of the insertion rod (28) is inserted and installed inside the slots (29).

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

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