An aquatic plant cultivation device

Abstract

The present application relates to the field of aquatic plant cultivation, and discloses an aquatic plant cultivation device, which comprises floating plates, expansion openings are left between the floating plates, a plurality of through holes are formed on each floating plate and are distributed at equal intervals, a protection structure is arranged on the upper surface of each floating plate at each through hole, an expansion structure is arranged at the rear end between the floating plates, and a clamping structure is arranged on the front side between the floating plates, when aquatic plants at the middle or near the middle of the floating plate need to be cultivated or picked, a cultivation worker only needs to remove the positioning between the corresponding two floating plates on the shore of the water area to be cultivated, the corresponding two floating plates can be pulled apart on the water surface through the expansion structure, and the two pulled-apart floating plates are pulled close to the shore, so that the cultivation difficulty of the aquatic plants on the floating plate is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of aquatic plant cultivation, and in particular to an aquatic plant cultivation device. Background Technology

[0002] The cultivation of aquatic plants refers to the process of enabling aquatic plants to grow healthily in water through specific methods and conditions. Aquatic plants are usually adapted to growing in water, and common species include water ferns, water onions, water hyacinths, and water lilies. Cultivating aquatic plants requires the use of cultivation equipment.

[0003] In the existing technology of aquatic plant cultivation devices, the splicing efficiency between floats is more efficient and faster. It changes the traditional threaded connection method and adopts a plastic locking part with deformation function to lock the rod set in the assembly notch, so as to complete the splicing between floats, which greatly improves the efficiency of subsequent installation and dismantling by the staff.

[0004] However, in the actual cultivation process, because several floating boards are spliced ​​together, it is necessary to disassemble the floating boards when cultivating or picking aquatic plants in or near the middle position. The operation is quite troublesome, and it may even require the cultivation personnel to use tools such as boats to carry out the operation, which increases the difficulty of the cultivation work. Therefore, there are areas for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides an aquatic plant cultivation device.

[0006] The aquatic plant cultivation device provided by this invention adopts the following technical solution:

[0007] An aquatic plant cultivation device includes floating plates, with expansion openings between multiple floating plates, and multiple equally spaced through holes on each floating plate. A protective structure is provided at each through hole on the floating plate, an expansion structure is provided at the rear end of the multiple floating plates, and an engaging structure is provided on the front side of the multiple floating plates.

[0008] The expansion structure includes a U-shaped rod connected to the rear end of the right side of the float plate, and a fixing plate connected to the rear end of the left side of the float plate, the fixing plate being movably sleeved on the U-shaped rod;

[0009] The locking structure includes a first sector plate installed at the left end of the front side of the float, and a second sector plate installed at the right end of the front side of the float. The first sector plate and the second sector plate can form a complete disc. A locking frame is provided at the front edge of the second sector plate. A first turntable is rotatably installed at the axial position of the front of the first sector plate. Two connecting strips are connected to the first turntable. A locking strip is installed at one end of each connecting strip and the locking strip is locked in the locking frame.

[0010] A cultivation structure is provided at the location of each through hole on the floating plate.

[0011] Preferably, the cultivation structure includes multiple cultivation cylinders installed below the floating plate and below each through hole. A support ring is installed below the inner wall of each through hole. A first fixing ring is placed on the support ring. A planting plate is fixedly installed in the first fixing ring. A second fixing ring is arranged directly above the first fixing ring. The second fixing ring and the first fixing ring are connected by two first connecting rods. A filter structure is provided inside the cultivation cylinder.

[0012] Preferably, the filtration structure includes an inner groove formed in the inner wall of the cultivation cylinder, a filter cylinder movably disposed in the inner groove, a filter hole formed on the filter cylinder, and multiple sets of water passage holes distributed at equal angles around the circumference on the side of the cultivation cylinder, with each set of multiple water passage holes vertically distributed on the cultivation cylinder, and a switching structure provided between the filter cylinder and the float plate.

[0013] Preferably, the switching structure includes a first opening located above the side of the cultivation cylinder, the first opening communicating with the inner groove, an arc-shaped strip located at the position of the first opening on the side of the filter cylinder, a plurality of first sliding grooves located on the right side edge below the float plate, a first slider slidably disposed in the first sliding groove, the first sliding groove being located corresponding to the position of the cultivation cylinder, a cleaning structure being provided on the cultivation cylinder, a driving strip being installed on the first slider, teeth being provided for mutual meshing connection between the driving strip and the arc-shaped strip, and a rotating structure being provided on the float plate.

[0014] Preferably, the rotating structure includes a screw that is rotatably inserted into the float plate, the screw passing through a first sliding groove, a threaded groove on the first sliding block for the screw to pass through, and a second turntable fixedly sleeved on the front end of the screw that extends out of the float plate.

[0015] Preferably, the cleaning structure includes multiple cleaning boxes evenly distributed around the side of the cultivation cylinder, with the multiple cleaning boxes and multiple sets of water passages spaced apart from each other. A third opening communicating with the cleaning boxes is provided on the inner wall of the tank. A bottom opening is provided at the bottom of each cleaning box. A second opening is provided in the middle of the side of the cleaning box away from the cultivation cylinder. A cleaning plate is attached to the inner wall of the cleaning box away from the cultivation cylinder. The two front sides of the cleaning plate are attached to the inner wall of the cleaning box. The cleaning plate is provided with bristles close to the filter cylinder. A second connecting rod is connected to the cleaning plate and extends through the second opening. A lifting ring is provided in the middle of the outer side of the cultivation cylinder. One end of the second connecting rod is connected to the lifting ring. A pull-out structure is provided between the lifting ring and the float plate.

[0016] Preferably, the pull-out structure includes a connecting plate fixedly connected to each group of multiple lifting rings. A driving plate is connected to both ends of the connecting plate. A driving groove is formed on the driving plate. A second sliding groove is formed on the left side edge of the float plate. A second slider is slidably arranged in the second sliding groove near both ends. A pull rod is fixedly passed through the two second sliders. A pull ring is installed on the front end of the pull rod that moves out of the float plate. A through frame is connected below the second slider. The through frame moves through the driving groove.

[0017] Preferably, the protective structure includes multiple sets of third sliding grooves formed on the float plate. Each set of multiple third sliding grooves is distributed at equal angles around the circumference of the through hole. A third slider is slidably disposed in each third sliding groove. A movable plate is installed on each third slider. A protective plate is installed on each movable plate. The protective plate is an arc-shaped plate. Multiple protective plates in each set form a complete cylinder. A rotating structure is provided between the float plate and the movable plate.

[0018] Preferably, the rotating structure includes multiple rotating rings rotatably disposed on the float plate. Each rotating ring has a through hole around its periphery. A drive rod is connected to each rotating ring at a position corresponding to each movable plate. Each movable plate has an inclined groove. One end of the drive rod is movably inserted into the corresponding inclined groove. Two grip rods are installed on the rotating ring.

[0019] In summary, the present invention has the following beneficial technical effects:

[0020] 1. The floating boards of the present invention are provided with an expansion structure and a positioning structure. When it is necessary to cultivate or harvest aquatic plants in the middle or near the middle position on the floating boards, the cultivators only need to release the positioning between the corresponding two floating boards at the shore of the water to be cultivated. Through the expansion structure, the corresponding two floating boards can be pulled apart directly on the water surface, and the two flattened floating boards can be pulled closer to the shore, which reduces the difficulty of cultivating aquatic plants on the floating boards and improves work efficiency.

[0021] 2. This invention is equipped with a filtration structure, a switching structure, and a rotation structure. The filtration structure filters solid impurities in the water at the water passage of the cultivation tube. The rotation and switching structures allow multiple filter tubes on the corresponding float to rotate synchronously, switching the remaining filter holes on the filter tubes to the water passage for continued filtration, thus making full use of the filter tubes.

[0022] 3. By incorporating a cleaning structure and a pull-out structure, this invention allows for the simultaneous cleaning of multiple filter cylinders on the floating plate after the filter cylinder rotates and switches filter holes, thus preventing impurities from clogging the filter cylinders and affecting the filtration process.

[0023] 4. This invention incorporates a protective structure and a rotating structure. The protective structure not only limits the aquatic plants, preventing them from drifting away from the floating board due to their own buoyancy, but also reduces damage to the cultivated aquatic plants caused by wild animals in the water. Furthermore, the rotating structure allows multiple protective plates in each group to be opened or closed simultaneously, facilitating the installation or disassembly of the cultivation structure and the harvesting of aquatic plants. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an aquatic plant cultivation device according to an embodiment of the present invention;

[0025] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point A;

[0026] Figure 3 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point B;

[0027] Figure 4 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point C;

[0028] Figure 5 This is a schematic diagram of the structure below the float in an embodiment of the present invention;

[0029] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point C;

[0030] Figure 7 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point E;

[0031] Figure 8 This is a schematic diagram of the structure of the cultivation tube in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure below the cultivation tube in an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the protective structure and the rotating structure on the floating plate after disassembly in an embodiment of the present invention;

[0034] Figure 11 This is an embodiment of the present invention. Figure 10 Enlarged view of the structure at point F.

[0035] Explanation of reference numerals in the attached drawings: 1. Floating plate; 2. Expansion port; 3. Through hole; 4. Fixing plate; 5. U-shaped rod; 6. First sector plate; 7. Second sector plate; 8. Frame; 9. First turntable; 10. Connecting strip; 11. Locking strip; 12. Cultivation cylinder; 13. First fixing ring; 14. Support ring; 15. Planting plate; 16. First connecting rod; 17. Second fixing ring; 18. First opening; 19. Filter cylinder; 20. Inner groove; 21. First sliding groove; 22. First slider; 23. Driving strip; 24. 25. Arc-shaped strip; 26. Screw; 27. Second turntable; 28. Cleaning box; 29. ​​Second opening; 30. Cleaning plate; 31. Lifting ring; 32. Second connecting rod; 33. Brush bristles; 34. Bottom opening; 35. Second slide groove; 36. Pull rod; 37. Second slider; 38. Through frame; 39. Connecting plate; 40. Driving plate; 41. Driving groove; 42. Pull ring; 43. Third slide groove; 44. Moving plate; 45. Inclined groove; 46. Protective plate; 47. Rotating ring; 48. Driving rod; 49. Handle rod. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-11 The present invention will be described in further detail below.

[0037] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 10 and Figure 11 This invention discloses an aquatic plant cultivation device, including a float plate 1, with an expansion opening 2 between multiple float plates 1, and multiple equally spaced through holes 3 on each float plate 1. A protective structure is provided on each through hole 3 on the float plate 1, an expansion structure is provided at the rear end between multiple float plates 1, and an engaging structure is provided on the front side between multiple float plates 1.

[0038] The expansion structure includes a U-shaped rod 5 connected to the rear end of the right side of the float plate 1, and a fixed plate 4 connected to the rear end of the left side of the float plate 1. The fixed plate 4 is movably sleeved on the U-shaped rod 5.

[0039] The locking structure includes a first sector plate 6 installed at the left end of the front side of the float plate 1, and a second sector plate 7 installed at the right end of the front side of the float plate 1. The first sector plate 6 and the second sector plate 7 can form a complete disc. A locking frame 8 is provided at the front edge of the second sector plate 7. A first turntable 9 is rotatably installed at the axial position of the front of the first sector plate 6. Two connecting strips 10 are connected to the first turntable 9. A locking strip 11 is installed at one end of the connecting strip 10 and the locking strip 11 is locked in the locking frame 8.

[0040] A cultivation structure is provided at the position of each through hole 3 on the floating plate 1;

[0041] The cultivation structure includes multiple cultivation cylinders 12 installed below each through hole 3 and below the floating plate 1. A support ring 14 is installed below the inner wall of each through hole 3, and a first fixing ring 13 is placed on the support ring 14. A planting plate 15 is fixedly installed in the first fixing ring 13. A second fixing ring 17 is positioned directly above the first fixing ring 13, and the second fixing ring 17 is connected to the first fixing ring 13 by two first connecting rods 16. A filter structure is installed inside each cultivation cylinder 12. This allows for adjustments when the cultivation device needs to be positioned in the middle or away from the shore. When cultivating or harvesting aquatic plants, the cultivators can directly rotate the locking strip 11 on the first sector plate 6 using the first turntable 9 at the shore. This will rotate the locking strip 11 out of the locking frame 8 on the second sector plate 7, releasing the positioning between the two corresponding floating plates 1. Then, by rotating the fixing plate 4 on the U-shaped rod 5, the two corresponding floating plates 1 can be opened directly to both sides, and the floating plates 1 can be slowly pulled towards the shore. This makes it convenient for the cultivators to cultivate or harvest aquatic plants located in the middle and far from the shore of the cultivation device.

[0042] See Figure 1 , Figure 5 , Figure 6 and Figure 8 The filtration structure includes an inner groove 20 formed in the inner wall of the cultivation tube 12, a filter tube 19 movably arranged in the inner groove 20, a filter hole formed on the filter tube 19, and multiple sets of water passage holes distributed at equal angles around the circumference on the side of the cultivation tube 12. Each set of multiple water passage holes is vertically distributed on the cultivation tube 12. A switching structure is provided between the filter tube 19 and the float plate 1. The filter holes on the filter tube 19 located at the water passage holes are used to filter solid impurities in the water, which plays a certain filtering role and ensures the flow of water in the cultivation tube 12, thereby providing oxygen to the cultivated aquatic plants.

[0043] The switching structure includes a first opening 18 located above the side of the cultivation cylinder 12, which is connected to the inner groove 20. An arc-shaped strip 24 is provided on the side of the filter cylinder 19 at the position of the first opening 18. Multiple first sliding grooves 21 are provided on the right edge of the float plate 1. A first slider 22 is slidably disposed in the first sliding groove 21. The first sliding groove 21 is opened corresponding to the position of the cultivation cylinder 12. A cleaning structure is provided on the cultivation cylinder 12. A driving strip 23 is installed on the first slider 22. Teeth that mesh with each other are provided between the driving strip 23 and the arc-shaped strip 24. A rotating structure is provided on the float plate 1.

[0044] The rotating structure includes a screw 25 inserted into the float plate 1. The screw 25 passes through the first sliding groove 21. The first slider 22 has a threaded groove for the screw 25 to pass through. A second turntable 26 is fixedly sleeved on the front end of the screw 25 that protrudes from the float plate 1. When the filter holes on the filter cylinder 19 at the water passage become clogged after long-term use, affecting the normal oxygen supply to aquatic plants, the screw 25 can be rotated on the float plate 1 using the second turntable 26. The first slider 22 moves on the screw 25, driving the filter cylinder 19 to rotate in the inner groove 20 through the driving bar 23 and the arc-shaped bar 24. This switches the clogged filter holes on the filter cylinder 19 from the water passage, and the remaining filter holes on the filter cylinder 19 rotate to the water passage to continue the filtration work. This not only makes full use of the filter cylinder 19 but also ensures the normal operation of the filtration work.

[0045] See Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The cleaning structure includes multiple cleaning boxes 27 arranged at equal angles around the side of the cultivation cylinder 12. The multiple cleaning boxes 27 are spaced apart from each other with multiple sets of water passage holes. A third opening communicating with the cleaning boxes 27 is opened on the wall of the inner tank 20. A bottom opening 33 is opened at the bottom of the cleaning box 27. A second opening 28 is opened in the middle of the side of the cleaning box 27 away from the cultivation cylinder 12. A cleaning plate 29 is closely attached to the inner wall of the side of the cleaning box 27 away from the cultivation cylinder 12. The two front sides of the cleaning plate 29 are closely attached to the inner wall of the cleaning box 27. The cleaning plate 29 is provided with bristles 32 close to the filter cylinder 19. A second connecting rod 31 is connected to the cleaning plate 29 and passes through the second opening 28. A lifting ring 30 is provided in the middle of the outer side of the cultivation cylinder 12. One end of the second connecting rod 31 is connected to the lifting ring 30. A pull-out structure is provided between the lifting ring 30 and the float plate 1.

[0046] The pull-out structure includes a connecting plate 38 fixedly connected to each group of multiple lifting rings 30. A driving plate 39 is connected to both ends of the connecting plate 38. A driving groove 40 is formed on the driving plate 39. A second sliding groove 34 is formed on the left side edge below the float 1. Second sliders 36 are slidably arranged near both ends of the second sliding groove 34. A pull rod 35 is fixedly passed through one of the two second sliders 36. The pull rod 35 moves out of the front end of the float 1 and is equipped with a pull ring 41. A through frame 37 is connected below the second slider 36. The through frame 37 moves through the driving groove 40. When the filter cartridge 19 is blocked... When the filter hole is switched to the cleaning box 27, the second slider 36 can be moved back and forth on the float plate 1 by using the pull ring 41. The second slider 36 drives the through frame 37 to move back and forth in the drive groove 40 of the drive plate 39. Through the connecting plate 38 and the lifting ring 30, the cleaning plate 29 and the bristles 32 move up and down in the cleaning box 27. The up and down movement of the bristles 32 close to the filter hole cleans the filter cylinder 19, extending the service life of the filter cylinder 19. The filtered solid impurities are discharged from the bottom opening 33 at the bottom of the cleaning box 27. The operation is simple and convenient.

[0047] See Figure 1 , Figure 2 , Figure 10 and Figure 11 The protective structure includes multiple sets of third sliding grooves 42 opened on the floating plate 1. Each set of multiple third sliding grooves 42 is distributed at equal angles around the circumference of the through hole 3. A third slider is slidably arranged in each third sliding groove 42. A movable plate 43 is installed on each third slider. A protective plate 45 is installed on each movable plate 43. The protective plate 45 is an arc-shaped plate. The lower part of the protective plate 45 is close to the upper part of the second fixing ring 17 to limit the planting plate 15. Each set of multiple protective plates 45 forms a complete cylinder. A rotating structure is provided between the floating plate 1 and the movable plate 43.

[0048] The rotating structure includes multiple rotating rings 46 rotatably mounted on the float plate 1. Each rotating ring 46 has a through hole 3 around its perimeter. A driving rod 47 is connected to each rotating ring 46 at a position corresponding to each movable plate 43. Each movable plate 43 has an inclined groove 44. One end of the driving rod 47 is movably inserted into the corresponding inclined groove 44. Two gripping rods 48 are installed on the rotating ring 46. The two gripping rods 48 drive the rotating ring 46 to rotate on the float plate 1, causing one end of the driving rod 47 to slide in the inclined groove 44. This pushes the multiple protective plates 45 in each group to move towards each other. The multiple groups of protective plates 45 move and splice together at the through hole 3. The lower part of the protective plate 45 is attached to the second fixing ring 17 to limit the planting plate 15. In this way, the spliced ​​protective plate 45 can protect the cultivated aquatic plants at the through hole 3, preventing the aquatic plants from drifting away from the cultivation device due to their own buoyancy after growth, thus playing a protective role.

[0049] The implementation principle of an aquatic plant cultivation device according to an embodiment of the present invention is as follows: First, the placement plate containing the cultivated aquatic plants is placed on the support ring 14 inside the through hole 3. Two levers 48 drive the rotating ring 46 to rotate on the float 1, causing one end of the driving rod 47 to slide in the inclined groove 44. This pushes multiple protective plates 45 in each group to move towards each other. The multiple protective plates 45 move and splice together at the through hole 3, with the lower part of the protective plates 45 attached to the second fixing ring 17, limiting the position of the planting plate 15. In this way, the spliced ​​protective plates 45 can protect the cultivated aquatic plants at the through hole 3, preventing the aquatic plants from drifting away from the cultivation device due to their own buoyancy after growth. This device serves a protective function. It can then be laid in the water area to cultivate aquatic plants. During cultivation, the filter holes on the filter cylinder 19 at the water passage opening filter solid impurities in the water, ensuring water flow within the cultivation cylinder 12 and thus supplying oxygen to the aquatic plants. If the filter holes on the filter cylinder 19 become clogged after prolonged use, affecting the normal oxygen supply to the aquatic plants, the second turntable 26 on the float 1 can be used to rotate the screw 25. The first slider 22 moves on the screw 25, driving the filter cylinder 19 to rotate in the inner groove 20 via the driving bar 23 and the arc-shaped bar 24, clearing the clogged filter cylinder 19. The filter holes are switched from the water inlet, and the remaining filter holes on the filter cylinder 19 rotate to the water inlet to continue filtration. This not only makes full use of the filter cylinder 19 but also ensures the normal operation of the filtration process. After switching, the second slider 36 can be moved back and forth on the float plate 1 using the pull ring 41. The second slider 36 drives the through frame 37 to move back and forth in the drive groove 40 of the drive plate 39. Through the connecting plate 38 and the lifting ring 30, the cleaning plate 29 and the brush bristles 32 move up and down within the cleaning box 27. The up and down movement of the brush bristles, which are close to the filter holes, cleans the filter cylinder 19, extending its service life. The filtered solid impurities are removed from the cleaning box. Discharge is made through the bottom opening 33 at the bottom of box 27. The operation is simple and convenient. When it is necessary to cultivate or harvest aquatic plants in the middle of the cultivation device or far from the shore, the cultivator can directly rotate the locking strip 11 on the first turntable 9 on the corresponding first sector plate 6 at the shore. The locking strip 11 is rotated out of the locking frame 8 on the second sector plate 7, releasing the positioning between the two corresponding floating plates 1. Then, by rotating the fixing plate 4 on the U-shaped rod 5, the two corresponding floating plates 1 are opened directly to both sides, and the floating plates 1 are slowly pulled towards the shore. In this way, the cultivator can cultivate or harvest aquatic plants in the middle and far from the shore of the cultivation device. The operation is more convenient, labor-saving, and the work efficiency is higher.

[0050] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An aquatic plant cultivation device, comprising a floating plate, characterized in that: An expansion opening is provided between the multiple float plates, and multiple equally spaced through holes are provided on each float plate. A protective structure is provided at each through hole on the float plate. An expansion structure is provided at the rear end of the multiple float plates, and an engaging structure is provided on the front side of the multiple float plates. The expansion structure includes a U-shaped rod connected to the rear end of the right side of the float plate, and a fixing plate connected to the rear end of the left side of the float plate, the fixing plate being movably sleeved on the U-shaped rod; The locking structure includes a first sector plate installed at the left end of the front side of the float, and a second sector plate installed at the right end of the front side of the float. The first sector plate and the second sector plate can form a complete disc. A locking frame is provided at the front edge of the second sector plate. A first turntable is rotatably installed at the axial position of the front of the first sector plate. Two connecting strips are connected to the first turntable. A locking strip is installed at one end of each connecting strip and the locking strip is locked in the locking frame. A cultivation structure is provided at the location of each through hole on the floating plate; The cultivation structure includes multiple cultivation cylinders installed below the float plate and below each through hole, and a filter structure is provided inside the cultivation cylinder; The filtration structure includes an inner groove formed in the inner wall of the cultivation cylinder, a filter cylinder movably disposed in the inner groove, a filter hole formed on the filter cylinder, and multiple sets of water passage holes distributed at equal angles around the circumference formed on the side of the cultivation cylinder, with multiple water passage holes in each set vertically distributed on the cultivation cylinder, and a switching structure provided between the filter cylinder and the float plate. The switching structure includes a first opening on the upper side of the cultivation cylinder, which communicates with the inner groove. An arc-shaped strip is provided on the side of the filter cylinder at the position of the first opening. Multiple first sliding grooves are provided on the lower right edge of the float plate. A first slider is slidably disposed in the first sliding groove. The first sliding groove is opened corresponding to the position of the cultivation cylinder. A cleaning structure is provided on the cultivation cylinder. A driving strip is installed on the first slider. Teeth that mesh with each other are provided between the driving strip and the arc-shaped strip. A rotating structure is provided on the float plate. The cleaning structure includes multiple cleaning boxes evenly distributed around the side of the cultivation cylinder. These cleaning boxes are spaced apart from multiple sets of water passages. A third opening communicating with the cleaning boxes is provided on the inner wall of the inner tank. Each cleaning box has a bottom opening. A second opening is located in the middle of the side of the cleaning box away from the cultivation cylinder. A cleaning plate is attached to the inner wall of the cleaning box away from the cultivation cylinder. The front two sides of the cleaning plate are attached to the inner wall of the cleaning box. The cleaning plate has bristles close to the filter cylinders. A second connecting rod extending through the second opening is connected to the cleaning plate. A lifting ring is located in the middle of the outer side of the cultivation cylinder. One end of the second connecting rod is connected to the lifting ring. A pull-out structure is provided between the lifting ring and the float plate. This pull-out structure and the cleaning structure allow for simultaneous cleaning of multiple filter cylinders on the float plate, preventing impurities from clogging the filter cylinders and affecting the filtration process. The rotating and switching structures allow multiple filter cylinders on the corresponding float plate to rotate synchronously, switching the remaining filter holes on the filter cylinders to the water passage holes to continue the filtration work, thus making full use of the filter cylinders.

2. The aquatic plant cultivation device according to claim 1, characterized in that: The rotating structure includes a screw that is inserted into the float plate, the screw passing through a first sliding groove, a threaded groove on the first sliding block for the screw to pass through, and a second turntable fixedly sleeved on the front end of the screw that extends out of the float plate.

3. The aquatic plant cultivation device according to claim 1, characterized in that: The pull-out structure includes a connecting plate fixedly connected to each group of multiple lifting rings. A driving plate is connected to both ends of the connecting plate. A driving groove is opened on the driving plate. A second sliding groove is opened on the left side edge of the float plate. A second slider is slidably arranged in the second sliding groove near both ends. A pull rod is fixedly passed through the two second sliders. A pull ring is installed on the front end of the pull rod that moves out of the float plate. A through frame is connected below the second slider. The through frame moves through the driving groove.

4. The aquatic plant cultivation device according to claim 1, characterized in that: The protective structure includes multiple sets of third sliding grooves formed on the float plate. Each set of multiple third sliding grooves is distributed at equal angles around the circumference of the through hole. A third slider is slidably disposed in each third sliding groove. A movable plate is installed on each third slider. A protective plate is installed on each movable plate. The protective plate is an arc-shaped plate. Multiple protective plates in each set form a complete cylinder. A rotating structure is provided between the float plate and the movable plate.

5. The aquatic plant cultivation device according to claim 4, characterized in that: The rotating structure includes multiple rotating rings rotatably mounted on the float plate. Each rotating ring has a through hole around its perimeter. A drive rod is connected to each rotating ring at the position corresponding to each movable plate. Each movable plate has an inclined groove. One end of the drive rod is movably inserted into the corresponding inclined groove. Two grip rods are installed on the rotating ring.

6. The aquatic plant cultivation device according to claim 1, characterized in that: A support ring is installed at the lower part of the inner wall of the through hole, and a first fixing ring is placed on the support ring. A planting plate is fixedly installed in the first fixing ring. A second fixing ring is set directly above the first fixing ring. The second fixing ring and the first fixing ring are connected by two first connecting rods.

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