Hydrodynamic self-suction type floating garbage collection device
The hydrodynamic self-priming floating garbage collection device uses the combination of paddles and guide channels to convert water flow energy into linear motion, solving the high energy consumption and maintenance problems of existing electric drive devices, and realizing efficient garbage collection in areas without electricity, which is suitable for remote water areas.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWESTERN POLYTECHNICAL UNIV
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing surface garbage collection devices rely on electric power, which results in high energy consumption, high operating costs, complex structure and high maintenance difficulty, and they are difficult to operate stably for a long time in areas without electricity or in remote areas.
A hydrodynamic self-priming floating garbage collection device is designed. It uses paddles to capture water flow energy and converts continuous rotational motion into linear reciprocating motion through the cooperation of protrusions and guide grooves. This enables the self-collection of floating garbage without the need for an external power source. The device is compact, energy-saving and environmentally friendly.
It achieves self-absorption collection of floating debris without external power supply, significantly improving collection efficiency and environmental sustainability. It is suitable for power-deficient or remote areas and can continuously and stably handle floating debris of different sizes and densities.
Smart Images
Figure CN224325751U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of floating debris collection technology, and more specifically, to a hydrodynamic self-priming floating debris collection device. Background Technology
[0002] Plastic debris not only damages aquatic landscapes but also gradually decomposes into tiny particles through photolysis and mechanical action, entering the food chain and causing long-term and irreversible harm to aquatic organisms such as fish and plankton. In addition to plastic waste, large quantities of seasonal fallen leaves, dead branches, and grass debris also float on the water surface. As they decompose in the water, they consume large amounts of dissolved oxygen and release organic matter, promoting excessive algae growth, leading to eutrophication, and consequently causing large-scale fish and shrimp deaths and water quality deterioration.
[0003] Current surface debris collection devices are mainly powered by electricity, using pumps to suck water and floating debris into collection tanks or screens. While this approach allows for continuous operation, it suffers from drawbacks such as high energy consumption, high operating costs, complex structure, and difficult maintenance. Furthermore, it is difficult to operate stably for extended periods in areas without electricity or in remote locations. Utility Model Content
[0004] The purpose of this application is to provide a hydrodynamic self-priming floating garbage collection device to address the shortcomings of the above-mentioned technology.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] This application provides a hydrodynamic self-priming floating garbage collection device, including a first sleeve floating on the water surface and a second sleeve coaxially and movably inserted inside the first sleeve. The top surface of the first sleeve is submerged below the water surface, and the upper end of the second sleeve is open and the lower end is closed.
[0007] A guide groove is provided circumferentially on the inner wall of the first sleeve. The guide groove oscillates periodically along the axial direction of the first sleeve. A protrusion is provided on the outer periphery of the second sleeve. The protrusion is movably inserted into the guide groove. A blade is fixedly installed on the bottom surface of the second sleeve. After being driven by the water flow, the blade drives the second sleeve to rotate along its own axial direction. At the same time, it is limited by the guide groove and moves back and forth along the axial direction relative to the first sleeve. The top surface of the second sleeve repeatedly sinks below the water surface and rises to the water surface.
[0008] Several drainage holes are provided on the side wall of the second sleeve. When the top surface of the second sleeve is raised to the water surface, the drainage holes are used to drain the water accumulated inside the second sleeve.
[0009] Furthermore, the guide groove exhibits sinusoidal oscillations.
[0010] Furthermore, the drain hole is located between the protrusion and the top surface of the second sleeve.
[0011] Furthermore, the protrusion includes a cylindrical structure and a hemispherical structure. One end of the hemispherical structure is movably inserted into the guide groove, and the other end is fixedly connected to the second sleeve through the cylindrical structure.
[0012] Furthermore, a flexible barrier is provided at the opening edge of the top surface of the second sleeve toward the opening axis. The extension direction of the flexible barrier forms an acute angle with the axial direction of the second sleeve, and the end of the flexible barrier near the axis of the second sleeve is lower than the end near the side wall of the second sleeve.
[0013] Furthermore, on the inner wall of the first sleeve, at least one sealing groove is provided on each side of the guide groove along the axial direction, and a sealing ring is installed in each sealing groove to ensure that the second sleeve always maintains a seal with the first sleeve during reciprocating motion.
[0014] Furthermore, the device also includes a frame fixed to the shore, with a first sleeve slidably connected to the frame to adapt to different water levels.
[0015] Furthermore, the device also includes a buoyancy assembly that is fixed to the first sleeve to ensure that the first sleeve floats on the water surface.
[0016] Furthermore, the buoyancy assembly includes a float plate and floats, the first sleeve is slidably connected to the frame via the float plate, and at least two floats are respectively arranged on both radial sides of the first sleeve.
[0017] Furthermore, a slide groove is provided in the frame, and a slide block is installed inside the slide block, with the slide block fixedly connected to the float plate.
[0018] The beneficial effects of this application include:
[0019] This application provides a hydrodynamic self-priming floating garbage collection device, including a first sleeve floating on the water surface and a second sleeve coaxially and movably inserted inside the first sleeve. The top surface of the first sleeve is submerged below the water surface, and the upper end of the second sleeve is open, while the lower end is closed. A guide groove is circumferentially formed on the inner wall of the first sleeve, and the guide groove oscillates periodically along the axial direction of the first sleeve. A protrusion is provided on the outer periphery of the second sleeve, and the protrusion is movably inserted into the guide groove. A blade is fixedly installed on the bottom surface of the second sleeve. Driven by the water flow, the blade drives the second sleeve to rotate along its own axial direction. Simultaneously, it is limited by the guide groove and reciprocates axially relative to the first sleeve. The top surface of the second sleeve repeatedly submerges below the water surface and rises to the water surface. Several drainage holes are formed through the side wall of the second sleeve. When the top surface of the second sleeve rises to the water surface, the drainage holes are used to drain the water accumulated inside the second sleeve. When the top surface of the second sleeve submerges below the water surface, the water flow carries floating garbage into the second sleeve. The device provided in this application utilizes paddles to capture water flow energy and, through the ingenious cooperation of protrusions and guide grooves, efficiently converts simple continuous rotational motion into linear reciprocating motion with a defined stroke. This successfully achieves a self-absorption and collection function for floating debris driven purely by water power, without the need for an external power source, making it more energy-efficient and environmentally friendly. Its compact structure and low manufacturing and maintenance costs make it highly suitable not only for remote areas where electricity is scarce or difficult to deploy, but also for its ability to continuously and stably handle floating debris of different sizes and densities, significantly improving collection efficiency and the sustainability of environmental governance. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 One of the structural schematic diagrams of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0022] Figure 2 This is the second schematic diagram of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0023] Figure 3 One of the structural schematic diagrams of the first sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0024] Figure 4 A second schematic diagram of the structure of the first sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0025] Figure 5Schematic diagram three of the structure of the first sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0026] Figure 6 for Figure 5 AA section view in the middle;
[0027] Figure 7 for Figure 5 BB cross-section diagram in the middle;
[0028] Figure 8 An unfolded view of the first sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0029] Figure 9 One of the structural schematic diagrams of the second sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0030] Figure 10 A second schematic diagram of the structure of the second sleeve of a hydrodynamic self-priming floating garbage collection device provided in this application;
[0031] Figure 11 This is a schematic diagram showing the connection between the float and the frame of a hydrodynamic self-priming floating garbage collection device provided in this application.
[0032] Icons: 1-blade; 2-second sleeve; 3-float; 4-buoy; 5-first sleeve; 6-flexible barrier; 7-sealing ring; 8-sealing groove; 9-frame; 10-slide groove; 11-slider; 12-guide groove; 13-protrusion; 14-drainage hole; 15-shore. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0037] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0038] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0039] The technical solution of this application will be described in detail below with reference to specific embodiments.
[0040] This application provides a hydrodynamic self-priming floating garbage collection device, such as... Figures 1 to 10 As shown, its main body consists of two coaxial sleeves: the first sleeve 5 floats on the water surface, with its top surface slightly below the water level, serving a fixing and supporting function; the second sleeve 2 is open at the top and closed at the bottom. The second sleeve 2 is movably inserted inside the first sleeve 5, and can be limited by the guide groove 12 opened circumferentially on the inner wall of the first sleeve 5, allowing it to both rotate along its own axis and reciprocate along the axis. The guide groove 12 on the inner wall of the first sleeve 5 undulates periodically along the axis, with troughs and crests alternating and undulating up and down along the sleeve axis; the outer periphery of the second sleeve 2 has a corresponding protrusion 13 that slides with the guide groove 12, allowing it to switch between rising and falling while rotating, thereby completing the relative movement with the first sleeve 5.
[0041] Specifically, the bottom surface of the second sleeve 2 is fixedly equipped with multiple blades 1, all facing the same direction to maximize the capture of water flow energy. The unidirectional impact of the water flow generates a continuous torque, driving the second sleeve 2 to rotate unidirectionally around its axis. During rotation, the protrusion 13 remains inserted in the guide groove 12. Utilizing the axial undulating design of the groove, as the protrusion 13 rises to the crest and falls to the trough, the inclined surface of the guide groove 12 pushes the second sleeve 2 to perform corresponding lifting and lowering movements, causing the top surface of the second sleeve 2 to repeatedly submerge below the water surface and rise above it. When the top surface of the second sleeve 2 rises to the water surface, the protrusion 13 is located at the trough of the guide groove 12; when the top surface of the second sleeve 2 submerges below the water surface, the protrusion 13 is located at the crest of the guide groove 12. The second sleeve 2 automatically switches between these two positions under the action of the water flow. In this way, a single continuous rotary input can be transformed into superimposed periodic linear motion, which simplifies the overall structure, ensures the reliability and synchronization of the motion, and requires no external power or complex transmission mechanism.
[0042] To achieve active suction and interception of floating debris, one or more drainage holes 14 are opened on the circumferential wall of the second sleeve 2. When there are multiple drainage holes 14, they are arranged at intervals along the circumference. The diameter and height of the drainage holes 14 correspond precisely to the troughs and crests of the guide groove 12 to ensure that debris is not discharged with the water flow during drainage. When the top surface of the second sleeve 2 is submerged below the water surface, the inside of the sleeve naturally fills with water and floating debris through the top opening. As the top surface of the second sleeve 2 rises to the water surface, the drainage holes 14 gradually emerge from the water surface. The water above the drainage holes 14 flows out by gravity, while the floating debris is retained inside the sleeve. Only the water below the drainage holes 14 and the floating debris remain in the sleeve, and there is no water above the drainage holes 14. Subsequently, when the top surface of the second sleeve 2 is submerged below the water surface again under the action of the water flow, the new water flow and floating debris are sucked into the second sleeve 2 through the top opening, completing one cycle.
[0043] In summary, the device provided in this application utilizes the propeller 1 to capture water flow energy and, through the ingenious cooperation of the protrusion 13 and the guide groove 12, forms a spatial cam mechanism. This efficiently converts simple continuous rotary motion into linear reciprocating motion with a defined stroke, successfully achieving a self-absorption and collection function of floating debris driven purely by water power without the need for an external power source, making it more energy-efficient and environmentally friendly. Its compact structure and low manufacturing and maintenance costs make it highly suitable not only for remote areas where electricity is scarce or difficult to deploy, but also for its ability to continuously and stably handle floating debris of different sizes and densities, significantly improving collection efficiency and the sustainability of environmental governance.
[0044] Furthermore, such as Figures 3 to 8As shown, the guide groove 12 exhibits a sinusoidal undulation. The sinusoidal waveform allows the slope of the guide groove 12 to transition smoothly between the trough and the crest, and the protrusion 13 is subjected to uniform force when climbing and sliding, avoiding the vibration impact and stress concentration caused by traditional sawtooth or stepped grooves, thereby improving the operational stability and durability of the device.
[0045] To meet the diverse needs of different water flow velocities and debris particle sizes, the period of the sine wave (i.e., the circumferential length corresponding to a complete trough-crest-trough cycle) can be flexibly set. A shorter period increases the frequency of lifting and lowering, suitable for situations with faster water flow or higher debris particle density, thereby increasing the collection volume per unit time; while a longer period extends the stroke length of each lifting and lowering stroke, better suited to the capture needs of low-speed water flow or large floating objects. By adjusting the period parameters of the guide channel 12, the force characteristics of the blade 1 and the recovery cycle rhythm can be precisely matched to maximize the hydrodynamic utilization efficiency.
[0046] Furthermore, such as Figure 9 and Figure 10 As shown, the drain hole 14 should be located between the protrusion 13 and the top surface of the second sleeve 2, so that when the top surface of the second sleeve 2 is submerged in the water, the opening coincides with the side wall of the first sleeve 5 and is blocked from draining water. However, when the top surface of the second sleeve 2 is raised to the water surface, the drain hole 14 has exceeded the top surface of the first sleeve 5, is no longer restricted by the side wall of the first sleeve 5 and is exposed to the water surface, and can quickly drain the water inside the sleeve under the action of gravity, so that floating garbage can be collected again when the top surface of the second sleeve 2 is submerged in the water.
[0047] Furthermore, such as Figure 9 and Figure 10 As shown, the protrusion 13 includes a cylindrical structure and a hemispherical structure. One end of the hemispherical structure is movably inserted into the guide groove 12, and the other end is fixedly connected to the second sleeve 2 through the cylindrical structure. The organic combination of the cylinder and the hemisphere allows the protrusion 13 to withstand the tangential load caused by the rotation of the second sleeve 2, and also to achieve smooth sliding with low friction within the guide groove 12 through the curved surface of the hemisphere, thereby ensuring a stable transition of the lifting stroke.
[0048] To ensure reliable connection and convenient installation, the second sleeve 2 has a pre-drilled threaded hole on its side wall that mates with the threaded part at the root of the cylinder. During installation, the hemisphere is first pushed into the guide groove 12 from the inside of the second sleeve 2, ensuring its spherical end fits tightly against the groove wall. Then, the threaded root of the cylinder is tightened onto the threaded part of the second sleeve 2. This secure connection at the cylinder's tail end ensures the hemisphere will not loosen during long-term stress cycles, while maintaining a small gap between the spherical end of the hemisphere and the groove wall, balancing tightness and sliding.
[0049] Furthermore, such as Figure 1 and Figure 2 As shown, multiple flexible barrier elements 6 are arranged at equal intervals along the circumferential direction from the opening edge of the top surface of the second sleeve 2 towards the opening axis. Their roots are fixed to the opening edge of the top surface of the second sleeve 2, extending into a thin, downward-sloping, sheet-like structure forming an acute angle with the cylinder axis. The end of the flexible barrier element 6 closest to the axis of the second sleeve 2 is axially lower than the end closest to the side wall of the second sleeve 2, causing the flexible barrier element 6 to rise slightly outward from the center, both covering the opening area and leaving a gap at a certain height, forming a semi-enclosed entrance for floating debris.
[0050] The flexible barrier 6 can be made of weather-resistant and fatigue-resistant polymer elastic material (such as silicone or thermoplastic polyurethane), and is firmly connected to the top edge of the second sleeve 2 through annular grooves or adhesive embedding. The flexible barrier 6 maintains a predetermined angle when stationary, ensuring sufficient free space at the opening for waste to enter; when water carries waste, the flexible barrier 6 bends and deforms inwards under the action of hydrodynamics, further expanding the feeding channel; after water carries waste into the cylinder, the flexible barrier 6 returns to its original position under its own elastic restoring force, preventing waste from overflowing in the opposite direction.
[0051] In practical implementation, the length, thickness, and angle between the flexible barrier 6 and the cylinder shaft can be adjusted according to the size of the garbage particles and the water flow velocity. Generally, the angle is controlled within the range of 20°-45° to ensure sufficient deformation space and rapid elastic recovery capability; the material thickness is between 1mm-3mm to ensure both appropriate rigidity and flexibility, as well as wear resistance. During installation, the flexible barrier 6 can be inserted into the pre-reserved slot at the top of the cylinder first, and then reinforced with screws or epoxy resin to ensure that it will not fall off or loosen during long-term circulation.
[0052] Furthermore, such as Figures 3 to 8 As shown, one or more sealing grooves 8 are respectively opened on both sides of the guide groove 12 on the inner wall of the first sleeve 5. Each groove is embedded with an elastic sealing ring 7, ensuring that the outer wall of the second sleeve 2 fits against the sealing ring 7 during reciprocating motion, forming a sealing interface. With this arrangement, the second sleeve 2 can fit tightly against the inner wall of the first sleeve 5 during up-and-down reciprocating and rotational movements, always maintaining a seal with the first sleeve 5, providing a stable dynamic sealing effect for long-term underwater operation of the device.
[0053] During the installation process, the sealing ring 7 is first pressed into the pre-drilled sealing groove 8 of the first sleeve 5. Then, the second sleeve 2 is inserted into the first sleeve 5. Next, the threaded hole on the side wall of the second sleeve 2 is aligned with the guide groove 12 on the inner wall of the first sleeve 5. The protrusion 13 is then screwed into the threaded hole from the inside of the second sleeve 2, ensuring that the spherical end of the protrusion 13 is precisely inserted into the guide groove 12 on the inner wall of the first sleeve 5. This achieves the installation of the first sleeve 5 and the second sleeve 2, maintaining excellent sealing and stable guiding fit.
[0054] Furthermore, such as Figure 1 and Figure 2 As shown, the device also includes a frame 9 fixed to the bank 15 along the axial direction of the first sleeve 5, which provides stable support and trajectory guidance for the device. The first sleeve 5 is slidably connected to the frame 9 along the axial direction, so that no matter how the water level changes, the first sleeve 5 can always rise and fall synchronously along the frame 9, so that its top surface is automatically kept slightly below the water surface, avoiding the deviation of the feeding height caused by water level fluctuations, thereby adapting to different water levels, improving the waste collection efficiency and the adaptability of the device under different operating conditions.
[0055] Furthermore, the device also includes a buoyancy assembly for keeping the top surface of the first sleeve 5 slightly below the water surface. The first sleeve 5 is fixedly connected to the buoyancy assembly, which is slidably connected to the frame 9. The buoyancy assembly provides upward buoyancy to the entire device based on the principle of hydrostatics, offsetting the weight of the cylinder, blades 1, and other structures, as well as the weight of the water stored inside the cylinder. When the water level rises, the buoyancy gradually increases, propelling the buoyancy assembly and the first sleeve 5 upward along the frame 9; when the water level falls, the buoyancy decreases, and under their own weight, the buoyancy assembly and the first sleeve 5 descend along the frame 9 until a new buoyancy equilibrium point is reached, ensuring that the top surface of the first sleeve 5 is always slightly below the water surface without manual intervention.
[0056] Furthermore, such as Figure 1 and Figure 2 As shown, the buoyancy assembly includes a float plate 3 slidably connected to the frame 9 and floats 4 disposed on the bottom surface of the float plate 3. A through hole is provided in the center of the float plate 3, and a first sleeve 5 is fixedly inserted through this through hole for fixed connection with the float plate 3. The float plate 3 can slide freely up and down on the frame 9 as the water level changes, while the first sleeve 5 remains synchronized with the float plate 3 in raising and lowering through the fixed through hole. At least two floats 4 are located on opposite radial sides of the first sleeve 5 to form symmetrical buoyancy support. Each float 4 is fixed to the bottom surface of the float plate 3 and connected to the float plate 3 by bolts or embedded bayonets. Typically, the float plate 3 and floats 4 are made of closed-cell foamed polyethylene or aluminum alloy to balance lightweight, corrosion resistance, and stable buoyancy output.
[0057] This buoyancy component configuration enables a simple yet efficient dynamic water level adaptation function. Regardless of river and lake rises and falls or flood season fluctuations, the sliding of the float plate 3 along the frame 9 and the stable buoyancy provided by the floats 4 allow the first sleeve 5 to move smoothly throughout the entire range without manual adjustment. This design not only significantly improves the device's automatic leveling capability and operational reliability under various water level conditions, but also, thanks to the symmetrically arranged floats 4, significantly reduces the risk of tilting, ensuring the accuracy, efficiency, and continuous stability of subsequent self-priming waste collection cycles.
[0058] Furthermore, such as Figure 11As shown, two grooves 10 extending axially along the first sleeve 5 are symmetrically provided on the frame 9. Slider 11 or pulleys are fixed to the two sides of the float plate 3 on the buoyancy assembly, with the slider 11 installed in the corresponding groove 10. The depth and width of the groove 10 are precisely matched to the dimensions of the slider 11 or pulley fitted to the buoyancy assembly to ensure minimal sliding clearance. Therefore, when the buoyancy assembly rises and falls with the water level, the slider 11 can smoothly roll or slide within the groove 10, guiding the first sleeve 5 to move vertically along a predetermined trajectory, while effectively constraining its translation, lateral oscillation, or rotation.
[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A hydrodynamic self-priming floating garbage collection device, characterized in that, It includes a first sleeve (5) floating on the water surface and a second sleeve (2) coaxially and movably inserted inside the first sleeve (5). The top surface of the first sleeve (5) is submerged below the water surface, and the upper end of the second sleeve (2) is open and the lower end is closed. A guide groove (12) is provided circumferentially on the inner wall of the first sleeve (5). The guide groove (12) oscillates periodically along the axial direction of the first sleeve (5). A protrusion (13) is provided on the outer periphery of the second sleeve (2). The protrusion (13) is movably inserted into the guide groove (12). A blade (1) is fixedly installed on the bottom surface of the second sleeve (2). After being driven by the water flow, the blade (1) drives the second sleeve (2) to rotate along its own axial direction. At the same time, it is limited by the guide groove (12) and moves back and forth along the axial direction relative to the first sleeve (5). The top surface of the second sleeve (2) repeatedly sinks below the water surface and rises to the water surface. A plurality of drainage holes (14) are provided in the side wall of the second sleeve (2). When the top surface of the second sleeve (2) is raised to the water surface, the drainage holes (14) are used to drain the water accumulated in the second sleeve (2).
2. The apparatus according to claim 1, characterized in that, The guide groove (12) exhibits sinusoidal fluctuations.
3. The apparatus according to claim 1 or 2, characterized in that, The drainage hole (14) is located between the protrusion (13) and the top surface of the second sleeve (2).
4. The apparatus according to claim 1 or 2, characterized in that, The protrusion (13) includes a cylindrical structure and a hemispherical structure. One end of the hemispherical structure is movably inserted into the guide groove (12), and the other end is fixedly connected to the second sleeve (2) through the cylindrical structure.
5. The apparatus according to claim 1 or 2, characterized in that, A flexible barrier (6) is provided at the opening edge of the top surface of the second sleeve (2) towards the opening axis. The extension direction of the flexible barrier (6) forms an acute angle with the axial direction of the second sleeve (2), and the end of the flexible barrier (6) near the axis of the second sleeve (2) is lower than the end near the side wall of the second sleeve (2).
6. The apparatus according to claim 1 or 2, characterized in that, On the inner wall of the first sleeve (5), at least one sealing groove is provided on each side of the guide groove (12) along the axial direction. A sealing ring (7) is installed in each sealing groove (8) to ensure that the second sleeve (2) remains sealed with the first sleeve (5) during reciprocating motion.
7. The apparatus according to claim 1 or 2, characterized in that, The device also includes a frame (9) fixed to the shore (15), and the first sleeve (5) is slidably connected to the frame (9) to adapt to different water levels.
8. The apparatus according to claim 7, characterized in that, The device also includes a buoyancy component that is fixed to the first sleeve (5) to ensure that the first sleeve (5) floats on the water surface.
9. The apparatus according to claim 8, characterized in that, The buoyancy assembly includes a float plate (3) and floats (4). The first sleeve (5) is slidably connected to the frame (9) through the float plate (3). At least two floats (4) are respectively arranged on both radial sides of the first sleeve (5).
10. The apparatus according to claim 9, characterized in that, A slide groove (10) is provided on the frame (9), and a slider (11) is installed in the slide groove (10). The slider (11) is fixedly connected to the float plate (3).