Algae control and ecological floating island nutrient supply device based on *Bellamya rubescens*

Abstract

This invention discloses an algae control and ecological floating island nutrient supply device based on *Bellamya rubescens*, belonging to the field of biological algae control technology. It includes a cylindrical body and an ecological floating island. The cylindrical body is fixed in the water source, with a funnel-shaped bottom. The ecological floating island floats on the water surface. A discharge pipe is installed at the bottom of the cylindrical body, and a lift pump is installed at the end of the discharge pipe furthest from the cylindrical body. This invention introduces algae-containing water into the interior of the cylindrical body, where *Bellamya rubescens*, raised between metal grids, feed on and enrich the algae. The snails' excrement is then collected and transported to the ecological floating island to provide nutrients for the plants there. This process not only removes algae but also promotes resource recycling. This method is safe and environmentally friendly, helping to maintain the balance of the aquatic ecosystem. Furthermore, it does not use any chemical reagents and employs a combination of biological and mechanical filtration, making it safe, harmless, and sustainably controlling algal blooms in water sources.

Description

Technical Field

[0001] This invention relates to an algae control and ecological floating island nutrient supply device based on *Bellamya pulcherrima*, belonging to the field of bio-algae control technology. Background Technology

[0002] Under the dual impact of global climate change and human activities, the eutrophication of lakes and reservoirs is becoming increasingly serious, leading to frequent cyanobacterial blooms and becoming a global water environment problem. In particular, *Cyclocarya pseudocylindrica*, a highly adaptable cyanobacterial species that can produce toxins, has gradually become the dominant species in some eutrophic water bodies in my country, exacerbating the threat of algal blooms to human health. Due to the small size of *Cyclocarya pseudocylindrica* and its uniform distribution in water, traditional physical algae removal technologies, such as filtration, flotation, pressurization, and ultrasound, are not ideal for treating it. In order to improve removal efficiency, it is usually necessary to combine flocculation pretreatment to increase the algal particle size, thereby improving the filtration effect.

[0003] Existing flocculation filtration technologies have some limitations in the treatment of algal blooms in water sources. First, due to the use of chemical agents, these technologies may not be suitable for environmentally sensitive water sources. Second, although commonly used flocculants such as polyaluminum chloride can effectively flocculate, the resulting flocs are often loose and fragile, which limits their potential to improve filtration efficiency. Furthermore, these agents are usually for single use, and in order to maintain a continuous flocculation effect, the agents need to be replenished continuously. This not only increases costs but also involves continuous manpower and energy consumption for the supply and treatment of agents.

[0004] To address these issues, a device for algae control and ecological floating island nutrient supply based on *Bellamya affinis* was designed. Summary of the Invention

[0005] The main objective of this invention is to provide an algae control and ecological floating island nutrient supply device based on *Bellamya rubescens*. Algae-containing water is introduced into the interior of the device, where *Bellamya rubescens*, raised between metal grids, feed on and accumulate algae. The snails' excrement is then collected and transported to the ecological floating island to provide nutrients for the island's plants. This process not only removes algae but also promotes resource recycling. This method is safe and environmentally friendly, helps maintain the balance of the aquatic ecosystem, and does not use any chemical reagents. It combines biological and mechanical filtration, ensuring safety and sustainable control of algal blooms at water sources. The device utilizes an annular floating plate, rectangular collection hopper, water pump, and corrugated expansion pipe. The algae-water addition mechanism, consisting of a discharge hood, a gear ring, a motor, gears, a level switch, a vertical groove, a limit block, an annular slide, and a slider, controls the rectangular collection hopper to rotate circumferentially on the outside of the cylinder during use to collect algae, increasing the oil content of the algae in the algae-water. It also automatically adds algae-containing water into the cylinder, making it more convenient to use. The cleaning structure, consisting of an impeller installed inside the algae discharge pipe, a shaft, a second brush plate, and a scraper, uses the impact force of the water flow to control the rotation of the impeller during the discharge process, thereby driving the second brush plate and scraper to rotate, ensuring the smooth flow of the metal grid and ensuring the complete discharge of excrement from the inside of the cylinder, making it more practical.

[0006] The objective of this invention can be achieved by adopting the following technical solution:

[0007] The algae control and ecological floating island nutrient supply device based on *Bellamya rubescens* includes a cylinder and an ecological floating island. The cylinder is fixed in the water source and has a funnel-shaped bottom. The ecological floating island floats on the water surface. A discharge pipe is installed at the bottom of the cylinder, and a lift pump is installed at the end of the discharge pipe away from the cylinder. A supply mechanism is installed at the top of the ecological floating island, and the supply mechanism is connected to the output end of the lift pump. A metal grid is horizontally installed in the middle of the cylinder, with two sets of metal grids, and *Bellamya rubescens* are raised between the two sets of metal grids. An algae water addition mechanism is installed in the middle of the outer side of the cylinder. A power supply mechanism is installed at the top of the cylinder. A cleaning mechanism for cleaning the metal grid and the bottom of the cylinder is installed inside the cylinder. A timer switch controller for controlling the lift pump is installed on the outer side of the cylinder.

[0008] Preferably, the supply mechanism includes annular pipes, support rods, and straight pipes. The annular pipes are evenly fixed on the top of the ecological floating island. Multiple sets of annular pipes are nested together, and each annular pipe has a discharge port at its bottom. Straight pipes are installed between adjacent annular pipes. Support rods are fixed between the bottom of the annular pipes and the ecological floating island. The output end of the booster pump is connected to the annular pipes.

[0009] Preferably, the cleaning mechanism includes a shaft, an impeller, a second brush plate, and a scraper. The shaft is vertically rotatably mounted at the top of the discharge pipe. An impeller is installed at the bottom of the shaft inside the discharge pipe. The top of the shaft passes through a metal grid. A second brush plate that fits into the metal grid is installed at the top of the shaft. A scraper that fits into the bottom of the cylinder is fixed on the side of the shaft.

[0010] Preferably, the algae water addition mechanism includes an annular float, a rectangular collection hopper, a water pump, a corrugated telescopic pipe, a discharge hood, and a rotating assembly. The annular float is fitted around the outside of the cylinder and floats on the liquid surface. A rectangular collection hopper is vertically fixed on the outer cross-section of the annular float. A water pump is installed inside the annular float. The input end of the water pump is connected to the inside of the rectangular collection hopper. A corrugated telescopic pipe is installed at the output end of the water pump. A discharge hood is installed at the top of the corrugated telescopic pipe. The discharge hood is located at the top of the cylinder. A rotating assembly is provided on the annular float to control the rotation of the annular float around the cylinder.

[0011] Preferably, the rotating assembly includes a toothed ring, a motor, a gear, and a level switch. The toothed ring is sleeved on the outside of the cylinder and is vertically slidably connected to the cylinder. The toothed ring is rotatably connected to an annular float. A motor is installed inside the annular float, and a gear that meshes with the toothed ring is installed at the output end of the motor. A level switch for controlling the start of the motor is provided at the top inside the cylinder.

[0012] Preferably, vertical grooves are evenly and vertically opened on the outer side of the cylinder, and limit blocks are slidably installed inside each vertical groove. The limit blocks are all fixedly connected to the inner wall of the toothed ring.

[0013] Preferably, the top of the annular float is provided with an annular groove, and sliders are uniformly slidably arranged inside the annular groove, with the top of each slider being fixedly connected to a toothed ring.

[0014] Preferably, the power supply mechanism includes a mounting pipe, a solar panel, and a battery pack. The mounting pipe is rotatably mounted on the top of the cylinder. Solar panels are evenly installed circumferentially on the bottom of the outer side of the mounting pipe, and a battery pack is installed on the outer side of the mounting pipe.

[0015] Preferred configuration: The discharge hood is installed on the mounting pipe, and a limit ring is horizontally fixed at the bottom of the outer side of the mounting pipe. Sliding holes are evenly opened on the limit ring, and vertical rods are slidably installed inside the sliding holes. The bottom ends of the vertical rods are fixedly connected to the annular float plate.

[0016] Preferably, a fixing rod is vertically installed on the inner wall of the cylinder, the top of the fixing rod extends to the top of the solar panel, and a first brush rod that is attached to the surface of the solar panel is fixed on the fixing rod.

[0017] The beneficial effects of this invention are as follows:

[0018] The algae control and ecological floating island nutrient supply device based on *Bellamya rubescens* provided by this invention introduces algae-containing water into the interior of the cylinder, where *Bellamya rubescens* raised between metal grids feed on and enrich the algae. The snails' excrement is then collected and transported to the ecological floating island to provide nutrients for the plants there. This process not only removes algae but also promotes resource recycling. This method is safe and environmentally friendly, helps maintain the balance of the aquatic ecosystem, and does not use any chemical reagents. It employs a combination of biological and mechanical filtration, making it safe, harmless, and sustainably controlling algal blooms in water sources.

[0019] The algae-water addition mechanism, consisting of an annular float, a rectangular collection hopper, a water pump, a corrugated telescopic pipe, a discharge hood, a toothed ring, a motor, gears, a level switch, a vertical trough, a limit block, an annular slide, and a slider, can control the rectangular collection hopper to rotate circumferentially on the outside of the cylinder during use to collect algae, increase the oil content of algae in the algae-water, and automatically add algae-containing water into the cylinder, making it more convenient to use.

[0020] The cleaning structure, consisting of an impeller installed inside the algae discharge pipe, a shaft, a second brush plate, and a scraper, can control the rotation of the impeller by the impact force of the water flow during the discharge of excrement. This, in turn, drives the second brush plate and scraper to rotate, ensuring the smooth flow of the metal grid and the complete discharge of excrement from the inside of the cylinder, thus enhancing its practicality. Attached Figure Description

[0021] Figure 1 This is a front view structural diagram of a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting bell snail of the present invention;

[0022] Figure 2 This is a cross-sectional view of the cylinder of a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting ring snail of the present invention;

[0023] Figure 3 This is a cross-sectional view of an ecological floating island in a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting ring-bellied snail of the present invention.

[0024] Figure 4 This is a preferred embodiment of the algae control and ecological floating island nutrient supply device based on *Bellamya affinis* of the present invention. Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 This is a top view of the annular floating plate in a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusted annular snail of the present invention.

[0026] Figure 6This is a top view of the toothed ring in a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting ring snail of the present invention;

[0027] Figure 7 This is a diagram of the power supply mechanism of a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting ring snail of the present invention;

[0028] Figure 8 This is a top view of the limiting ring in a preferred embodiment of the algae control and ecological floating island nutrient supply device based on the copper-rusting ring-shaped snail of the present invention.

[0029] In the diagram: 1. Cylinder body; 2. Ecological floating island; 3. Discharge pipe; 4. Booster pump;

[0030] 5. Supply mechanism; 501. Ring pipe; 502. Support rod; 503. Straight pipe;

[0031] 6. Metal grille;

[0032] 7. Algae water addition mechanism; 701. Annular float plate; 702. Rectangular collection hopper; 703. Water pump; 704. Corrugated expansion pipe; 705. Discharge hood;

[0033] 706. Rotating assembly; 7061. Gear ring; 7062. Motor; 7063. Gear; 7064. Liquid level switch; 7065. Vertical groove; 7066. Limit block; 7067. Annular slide; 7068. Slider;

[0034] 8. Power supply mechanism; 801. Mounting pipe; 802. Solar panel; 803. Battery pack; 804. Limiting ring; 805. Sliding hole; 806. Vertical rod; 807. Fixing rod; 808. First brush rod;

[0035] 9. Cleaning mechanism; 901. Shaft; 902. Impeller; 903. Second brush plate; 904. Scraper;

[0036] 10. Timer switch controller. Detailed Implementation

[0037] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] like Figures 1-8As shown, this embodiment provides an algae control and ecological floating island nutrient supply device based on *Bellamya rubescens*, including a cylinder 1 and an ecological floating island 2. The cylinder 1 is fixed in a water source, and the bottom of the cylinder 1 is funnel-shaped. The ecological floating island 2 floats on the water surface. A discharge pipe 3 is installed at the bottom of the cylinder 1, and a lift pump 4 is installed at the end of the discharge pipe 3 away from the cylinder 1. A supply mechanism 5 is provided at the top of the ecological floating island 2, and the supply mechanism 5 is connected to the output end of the lift pump 4. A metal grid 6 is horizontally provided at the middle position inside the cylinder 1. Two sets of metal grids 6 are provided, and *Bellamya rubescens* are raised between the two sets of metal grids 6. An algae water addition mechanism 7 is provided at the middle position outside the cylinder 1. A power supply mechanism 8 is installed at the top of the cylinder 1. A cleaning mechanism 9 is provided inside the cylinder 1 for cleaning the metal grid 6 and the bottom of the cylinder 1. A timer switch controller 10 for controlling the lift pump 4 is provided outside the cylinder 1.

[0039] Overall working principle: During use, the copper-rusted ring snails are raised between two sets of metal grids 6. The device is self-powered by the power supply mechanism 8. The algae-containing water is injected into the interior of the cylinder 1 by the algae water addition mechanism 7. The copper-rusted ring snails feed on and accumulate algae. The snails' excrement falls to the bottom of the cylinder 1. The timer switch controller 10 controls the timed start of the lift pump 4 to extract the snail excrement, collect it, and transport it to the interior of the supply mechanism 5. Then, the supply mechanism 5 sprays the excrement from the top into the planting trough of the plants to provide nutrients to the plants of the ecological floating island 2. In addition, during the process of excrement discharge, the cleaning mechanism 9 cleans the metal grids 6 and the bottom of the cylinder 1 to ensure that the excrement falls and is collected smoothly. After the excrement is extracted, the algae water addition mechanism 7 is used again to add algae water. The above steps are repeated to continuously control algae and supply nutrients to the ecological floating island 2.

[0040] In this embodiment, the supply mechanism 5 includes annular pipe 501, support rod 502 and straight pipe 503. The annular pipe 501 is evenly fixed on the top of the ecological floating island 2. Multiple sets of annular pipes 501 are nested together, and each annular pipe 501 has a discharge port at its bottom. A straight pipe 503 is installed between adjacent annular pipes 501. The support rod 502 is fixed between the bottom of the annular pipe 501 and the ecological floating island 2. The output end of the lifting pump 4 is connected to the annular pipe 501.

[0041] Local working principle: The excrement and water pumped by the booster pump 4 enter the annular pipe 501, and then the excrement is evenly sprayed out through the discharge port at the bottom of the annular pipe 501 to supplement the plants with nutrients.

[0042] In this embodiment, the cleaning mechanism 9 includes a shaft 901, an impeller 902, a second brush plate 903, and a scraper 904. The shaft 901 is vertically rotatably mounted on the top end of the discharge pipe 3. The impeller 902 is installed at the bottom end of the shaft 901 and inside the discharge pipe 3. The top end of the shaft 901 passes through the metal grid 6. The second brush plate 903, which is in contact with the metal grid 6, is installed on the top of the shaft 901. The scraper 904, which is in contact with the bottom end of the cylinder 1, is fixed on the side of the shaft 901.

[0043] Local working principle: When extracting excrement and water, the flow rate of water increases after entering the discharge pipe 3, which will apply a thrust to the impeller 902 and control the rotation of the shaft 901. The shaft 901 drives the second brush plate 903 and the scraper 904 to rotate, respectively cleaning the metal grid 6 and the bottom of the cylinder 1.

[0044] In this embodiment, the algae water addition mechanism 7 includes an annular float 701, a rectangular collection hopper 702, a water pump 703, a corrugated telescopic pipe 704, a discharge hood 705, and a rotating assembly 706. The annular float 701 is sleeved on the outside of the cylinder 1 and floats on the liquid surface. The rectangular collection hopper 702 is vertically fixed on the outer cross-section of the annular float 701. The water pump 703 is installed inside the annular float 701. The input end of the water pump 703 is connected to the inside of the rectangular collection hopper 702. The output end of the water pump 703 is equipped with a corrugated telescopic pipe 704. The top end of the corrugated telescopic pipe 704 is equipped with a discharge hood 705. The discharge hood 705 is located at the top of the cylinder 1. The annular float 701 is provided with a rotating assembly 706 for controlling the rotation of the annular float 701 around the cylinder 1.

[0045] Local working principle: When adding algae water, the rotating component 706 controls the rotation of the annular float 701. The annular float 701 drives the rectangular collection bucket 702 to rotate around the outside of the cylinder 1, collecting the algae around the cylinder 1. The water pump 703 is started to extract the water source and algae, and then sprays it out from the discharge hood 705 through the corrugated telescopic pipe 704 and discharges it into the interior of the cylinder 1.

[0046] In this embodiment, the rotating assembly 706 includes a gear ring 7061, a motor 7062, a gear 7063, and a level switch 7064. The gear ring 7061 is sleeved on the outside of the cylinder 1 and is vertically slidably connected to the cylinder 1. The gear ring 7061 is rotatably connected to the annular float 701. The motor 7062 is installed inside the annular float 701. The output end of the motor 7062 is equipped with a gear 7063 that meshes with the gear ring 7061. A level switch 7064 for controlling the start of the motor 7062 is provided at the top inner part of the cylinder 1.

[0047] Local working principle: Since the annular float 701 always floats on the liquid surface, and the toothed ring 7061 is connected to the top of the annular float 701 and rotates with the annular float 701, and rises and falls together with the annular float 701, when algae water is added, the motor 7062 is started to drive the gear 7063 to rotate. The gear 7063 will rotate around the toothed ring 7061, thereby changing the position of the rectangular collection hopper 702. When algae water is added, the motor 7062 and the water pump 703 are controlled by the liquid level switch 7064.

[0048] In this embodiment, vertical grooves 7065 are uniformly and vertically opened on the outer side of the cylinder 1. Limiting blocks 7066 are slidably installed inside the vertical grooves 7065, and the limiting blocks 7066 are fixedly connected to the inner wall of the toothed ring 7061.

[0049] Local working principle: When the toothed ring 7061 moves up and down with the annular float 701, the limiting block 7066 slides inside the vertical groove 7065, ensuring that the toothed ring 7061 will not rotate.

[0050] In this embodiment, an annular groove 7067 is provided on the top of the annular float 701, and sliders 7068 are uniformly slidably arranged inside the annular groove 7067. The top of each slider 7068 is fixedly connected to the toothed ring 7061.

[0051] Local working principle: The annular float 701 is slidably connected to the toothed ring 7061 through the slider 7068.

[0052] In this embodiment, the power supply mechanism 8 includes a mounting pipe 801, a solar panel 802, and a battery pack 803. The mounting pipe 801 is rotatably mounted on the top of the cylinder 1. The solar panel 802 is evenly mounted circumferentially on the bottom of the outer side of the mounting pipe 801, and the battery pack 803 is mounted on the outer side of the mounting pipe 801.

[0053] Local working principle: During use, the device generates electricity through solar energy and stores the electricity inside the battery pack 803 to provide self-powered power to the equipment.

[0054] In this embodiment, the discharge hood 705 is installed on the mounting pipe 801. A limit ring 804 is horizontally fixed at the bottom of the outer side of the mounting pipe 801. Sliding holes 805 are evenly opened on the limit ring 804. Vertical rods 806 are slidably installed inside the sliding holes 805. The bottom ends of the vertical rods 806 are fixedly connected to the annular float 701.

[0055] Local working principle: During the rotation of the annular float 701, the vertical rod 806 can apply a thrust to the limiting ring 804, controlling the installation pipe 801 to rotate at the top of the cylinder 1, and the algae water is discharged in a circumferential rotation.

[0056] In this embodiment, a fixing rod 807 is vertically installed on the inner wall of the cylinder 1. The top end of the fixing rod 807 extends to the top of the solar panel 802. A first brush rod 808 that is in contact with the surface of the solar panel 802 is fixed on the fixing rod 807.

[0057] Local working principle: During the process of the installation tube 801 driving the solar panel 802 to rotate, the first brush rod 808 can clean the surface of the solar panel 802 to ensure the power generation effect.

[0058] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A device for algae control and ecological floating island nutrient supply based on *Bellamya affinis*, comprising a cylindrical body (1) and an ecological floating island (2), characterized in that: The cylinder (1) is fixed in the water source and the bottom of the cylinder (1) is funnel-shaped. The ecological floating island (2) floats on the water surface. The bottom of the cylinder (1) is equipped with a discharge pipe (3). The end of the discharge pipe (3) away from the cylinder (1) is equipped with a lift pump (4). The top of the ecological floating island (2) is equipped with a supply mechanism (5), and the supply mechanism (5) is connected to the output end of the lift pump (4). The middle position inside the cylinder (1) is equipped with a horizontal metal grid (6). There are two sets of metal grids (6), and copper rust ring snails are raised between the two sets of metal grids (6). The middle position outside the cylinder (1) is equipped with an algae water addition mechanism (7). The top of the cylinder (1) is equipped with a power supply mechanism (8). The inside of the cylinder (1) is equipped with a cleaning mechanism (9) for cleaning the metal grid (6) and the bottom of the cylinder (1). The outside of the cylinder (1) is equipped with a timer switch controller (10) for controlling the lift pump (4). The cleaning mechanism (9) includes a shaft (901), an impeller (902), a second brush plate (903), and a scraper (904). The shaft (901) is vertically rotatably mounted on the top of the discharge pipe (3). The impeller (902) is installed at the bottom of the shaft (901) and inside the discharge pipe (3). The top of the shaft (901) passes through the metal grid (6). The second brush plate (903) is installed on the top of the shaft (901) and fits against the metal grid (6). The scraper (904) is fixed on the side of the shaft (901) and fits against the bottom of the cylinder (1). The algae water addition mechanism (7) includes an annular float (701), a rectangular collection hopper (702), a water pump (703), a corrugated telescopic pipe (704), a discharge hood (705), and a rotating component (706). The annular float (701) is fitted on the outside of the cylinder (1) and floats on the liquid surface. The rectangular collection hopper (702) is vertically fixed on the outer cross-section of the annular float (701). The water pump (703) is installed inside the annular float (701). The input end of the water pump (703) is connected to the inside of the rectangular collection hopper (702). The output end of the water pump (703) is equipped with a corrugated telescopic pipe (704). The top end of the corrugated telescopic pipe (704) is equipped with a discharge hood (705). The discharge hood (705) is located at the top of the cylinder (1). The annular float (701) is provided with a rotating component (706) to control the rotation of the annular float (701) around the cylinder (1).

2. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 1, characterized in that: The supply mechanism (5) includes an annular pipe (501), a support rod (502) and a straight pipe (503). The annular pipe (501) is evenly fixed on the top of the ecological floating island (2). Multiple sets of annular pipes (501) are nested together, and each annular pipe (501) has a discharge port at its bottom. A straight pipe (503) is installed between adjacent annular pipes (501). The bottom of the annular pipe (501) is fixed with a support rod (502) between it and the ecological floating island (2). The output end of the booster pump (4) is connected to the annular pipe (501).

3. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 2, characterized in that: The rotating assembly (706) includes a gear ring (7061), a motor (7062), a gear (7063), and a level switch (7064). The gear ring (7061) is sleeved on the outside of the cylinder (1) and is vertically slidably connected to the cylinder (1). The gear ring (7061) is rotatably connected to the annular float (701). The motor (7062) is installed inside the annular float (701). The output end of the motor (7062) is equipped with a gear (7063) that meshes with the gear ring (7061). The inner top of the cylinder (1) is provided with a level switch (7064) that controls the start of the motor (7062).

4. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 3, characterized in that: Vertical grooves (7065) are evenly and vertically opened on the outer side of the cylinder (1). Limiting blocks (7066) are slidably installed inside the vertical grooves (7065). The limiting blocks (7066) are all fixedly connected to the inner wall of the toothed ring (7061).

5. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 4, characterized in that: The top of the annular float (701) is provided with an annular groove (7067), and a slider (7068) is uniformly slidably arranged inside the annular groove (7067). The top of the slider (7068) is fixedly connected to the toothed ring (7061).

6. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 5, characterized in that: The power supply mechanism (8) includes an installation tube (801), a solar panel (802) and a battery pack (803). The installation tube (801) is rotatably installed on the top of the cylinder (1). The solar panel (802) is evenly installed circumferentially on the bottom of the outer side of the installation tube (801). The battery pack (803) is installed on the outer side of the installation tube (801).

7. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 6, characterized in that: The discharge hood (705) is installed on the installation pipe (801). A limit ring (804) is fixed horizontally at the bottom of the outer side of the installation pipe (801). Sliding holes (805) are evenly opened on the limit ring (804). Vertical rods (806) are slidably installed inside the sliding holes (805). The bottom ends of the vertical rods (806) are fixedly connected to the annular float (701).

8. The algae control and ecological floating island nutrient supply device based on *Bellamya affinis* according to claim 7, characterized in that: A fixing rod (807) is vertically installed on the inner wall of the cylinder (1). The top of the fixing rod (807) extends to the top of the solar panel (802). A first brush rod (808) that is in contact with the surface of the solar panel (802) is fixed on the fixing rod (807).

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