River bend scouring prevention device
By installing anti-scour walls and rotating fan-blade devices on the concave bank of river bends, the direction of water flow is changed and debris is hooked out, thus solving the problem of scour on the concave bank of river bends and improving the anti-scour and protective effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN UNIV ENG DESIGN & RES INST CO LTD
- Filing Date
- 2023-06-02
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technologies are prone to erosion at concave banks in river bends, leading to bank collapse and poor erosion prevention, especially when the water flow exceeds the standard.
A toothed wall is installed on the concave bank slope, consisting of multiple anti-scour walls with increasing distance between them from top to bottom. A cylinder and a rotating ring are installed on the side away from the riverbed. Fan blades and hooks are installed on the cylinder. The impact of the water flow drives the fan blades to rotate, hooking up debris in the river channel and changing the direction of the water flow to reduce scour on the concave bank.
By changing the direction of water flow and removing debris from the riverbed, the erosion and damage to the concave bank are reduced, the erosion prevention effect is improved, the concave bank toe is protected, and the loss of sediment is prevented.
Smart Images
Figure CN116607468B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of river erosion prevention technology, and in particular to a device for preventing erosion and damage in river bends. Background Technology
[0002] Natural river channels are usually winding, forming concave and convex banks at the bends. Concave banks usually refer to the inward-curving part of the land, while convex banks usually refer to the outward-curving part of the land.
[0003] In river bends, due to centrifugal force, surface water flows from the convex bank to the concave bank, while bottom water flows from the concave bank to the convex bank, forming a lateral circulation. At the concave bank, the water flows downwards at a higher velocity, scouring the concave bank, while sediment from the bottom flow accumulates on the convex bank. Currently, scour prevention in river bends mainly relies on bank protection and increasing foundation depth to reduce scour on the concave bank. However, when the river flow exceeds standard levels, concave bank protection is prone to collapse, resulting in ineffective scour prevention. Summary of the Invention
[0004] To help improve the scour prevention effect of concave banks, this application provides a device for preventing scour and damage in river bends.
[0005] The anti-scouring and anti-damage device for river bends provided in this application adopts the following technical solution:
[0006] A river bend erosion prevention device includes a concave bank slope, on which a toothed wall is provided. The toothed wall includes multiple erosion prevention walls arranged on the concave bank slope. The multiple erosion prevention walls are arranged at intervals in a vertical direction. The distance between the side of the erosion prevention wall near the convex bank slope and the side of the erosion prevention wall near the concave bank slope increases from top to bottom.
[0007] By adopting the above technical solution, when the river water flows towards the concave bank, it impacts the scour protection wall. Under the action of the scour protection wall, the water flows downward. Then, after being blocked by the lower layer of scour protection wall, it is refracted, changing the direction of the water flow and guiding the downward-flowing water towards the convex bank of the river. This reduces the scour damage to the concave bank's toe protection during the spiral flow, thus helping to improve the scour protection effect of the concave bank.
[0008] Preferably, the erosion protection wall extends from the concave bank slope toward the direction of water flow.
[0009] By adopting the above technical solution, the direction of water flow can be changed before the river water erodes the concave bank, and the downstream river water can be diverted to the convex bank of the river channel, thereby reducing the erosion damage to the concave bank and helping to improve the erosion prevention effect of the concave bank.
[0010] Preferably, a cylinder is provided on the anti-erosion wall on the side away from the riverbed, the cylinder extending towards the convex bank slope, a rotating ring is rotatably fitted on the cylinder, the rotation axis of the rotating ring is parallel to the length direction of the cylinder, and multiple fan blades are arranged at intervals along the circumference of the rotating ring, the fan blades are used to contact the surface water flow, and a first hooking element is provided on the side of the fan blades near the rotation direction for hooking up river debris.
[0011] By adopting the above technical solution, the surface water flowing towards the anti-scour wall in the river channel will impact the fan blades to rotate, causing the rotating ring to drive multiple fan blades to rotate continuously. The first hooking component can continuously wrap around and hook up aquatic plants, plastic and other debris in the river channel during the rotation process, making it difficult for debris in the river channel to be carried downstream by the river water along with the silt on the concave bank slope, thereby further reducing the scour of the concave bank slope.
[0012] Preferably, the first hooking member includes a first toothed claw disposed on the side of the fan blade plate near the rotation direction, and the opening of the first toothed claw is disposed in the direction close to the rotating ring.
[0013] By adopting the above technical solution, during the rotation of the fan blade, the first toothed rake can wrap around and hook up aquatic plants, plastic and other debris in the river channel, making it difficult for debris in the river channel to carry the mud and sand of the concave bank slope downstream with the river water, which helps to improve the anti-erosion effect of the concave bank.
[0014] Preferably, the first toothed rake claw is rotatably disposed on the side of the fan blade plate near the direction of rotation, and the rotation axis of the first toothed rake claw is parallel to the rotation axis of the rotating ring. A collection chamber is provided on the side of the cylinder away from the riverbed. An adjustment component is provided on the fan blade plate to drive the first toothed rake claw to rotate toward or away from the rotating ring. When the first toothed rake claw moves above the collection chamber, the adjustment component adjusts the first toothed rake claw to rotate toward the direction of the rotating ring to reduce the opening range of the first toothed rake claw.
[0015] By adopting the above technical solution, when the first rake claw rotates to the top of the collection chamber, the first rake claw is adjusted to rotate towards the direction of the rotating ring by the adjustment component. This makes the opening of the first rake claw gradually blocked as it rotates towards the fan blade. As a result, plastic and other debris on the first rake claw are less likely to continue to be flung into the river water during the rotation of the fan blade. This makes it easier for plastic, nylon and other debris to fall into the collection chamber, facilitating the collection of debris in the river channel and helping to improve the anti-scouring effect of the concave bank.
[0016] Preferably, a rotating shaft is threaded through the first toothed rake claw, the rotating shaft rotates on the corresponding fan blade plate, and the adjusting assembly includes a torsion spring sleeved on the rotating shaft, a pull rope disposed on the side of the first toothed rake claw away from the rotating shaft, and a winding / unwinding device disposed on the cylinder. The torsion spring is used to drive the first toothed rake claw to rotate in a direction away from the rotating ring, the pull rope is used to pull the first toothed rake claw to rotate in a direction closer to the rotating ring, and the winding / unwinding device is used to wind up or unwind the pull rope.
[0017] By adopting the above technical solution, the first rake claw is rotated towards the rotating ring by pulling the rope, so that the opening of the first rake claw is gradually blocked. This helps to prevent plastic and other debris on the first rake claw from being thrown into the river water during the rotation of the fan blades, thus ensuring the removal effect of debris in the river channel. The torsion spring drives the first rake claw to rotate away from the rotating ring, thereby expanding the opening range for debris to enter the first rake claw, making it easier to collect debris in the river channel and reducing the possibility of debris carrying mud and sand from the concave bank slope.
[0018] Preferably, the take-up and unwinding component includes a connecting rod disposed on the fan blade, a drum rotatably disposed on the connecting rod, a rack gear coaxially disposed on the drum, and a rack plate disposed on the drum body. The length direction of the connecting rod is perpendicular to the rotation axis of the rotating ring, and the rotation axis of the drum is parallel to the length direction of the connecting rod. The drum is located on the side of the connecting rod closer to the rotating ring, and the pull rope is wound around the corresponding drum on the side away from the first toothed claw. The rack plate is arc-shaped and is concentrically disposed with the rotating ring. The rack plate is located on the side of the drum body closer to the collecting cavity. The rack gear is used to mesh with the rack plate. When the fan blade rotates, driving the rack gear to roll along the rack plate in the direction of rotation, the drum rotates to wind up the pull rope.
[0019] By adopting the above technical solution, the fan blade drives the connecting rod to rotate along the cylinder. When the rack gear on the connecting rod approaches the collection chamber, the rack gear gradually meshes with the rack plate. Then the rack gear rolls along the rack plate on the cylinder, driving the drum to wind up the pull rope, so that the pull rope can pull the first toothed rake claw to rotate in the direction close to the rotating ring. After the rack gear disengages from the rack plate, it facilitates the rotation and reset of the first toothed rake claw.
[0020] Preferably, a second toothed claw is provided on the side of the fan blade away from the rotation direction, and the distance from the side of the second toothed claw away from the rotating ring to the center of the cylinder is greater than the distance from the side of the fan blade away from the rotating ring to the center of the cylinder.
[0021] By adopting the above technical solution, the setting of the second rake claw further helps to hook weeds and other debris in the river water.
[0022] Preferably, a guide wall is provided on the anti-erosion wall on the side away from the riverbed. The guide wall is arranged vertically, and a counterweight is slidably arranged in the guide wall along the length direction. The counterweight is connected to the cylinder, and a float is provided on the counterweight. The bottom wall of the float is located below the opening of the collection chamber.
[0023] By adopting the above technical solution, when the water level in the river rises or falls, the floating plate drives the cylinder to move up and down, which helps to ensure the rotation of the fan blades.
[0024] Preferably, the fan blade plate has multiple water passage holes.
[0025] By adopting the above technical solution, the opening of the water passage hole helps to reduce the impact force of river water on the fan blade.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] 1. When the river water flows towards the concave bank, it impacts the scour barrier. Under the action of the scour barrier, the water flows downward. Then, after being blocked by the lower scour barrier, the water flow is refracted, changing its direction and guiding the downward-flowing water towards the convex bank. This reduces the scour damage to the concave bank's toe as the water flows in a spiral motion, thus improving the scour protection effect of the concave bank.
[0028] 2. The surface water flowing towards the scour protection wall in the river channel will impact the fan blades to rotate, causing the rotating ring to drive multiple fan blades to rotate continuously. The first hooking component can continuously wrap around and hook up aquatic plants, plastic and other debris in the river channel during the rotation, making it difficult for debris in the river channel to be carried downstream by the river water along with the silt on the concave bank slope, thereby further reducing the scour of the concave bank slope. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.
[0030] Figure 2 This is a partial structural cross-sectional view of an embodiment of this application.
[0031] Figure 3 This is a partial structural cross-sectional view of an embodiment of this application.
[0032] Figure 4 yes Figure 3 Enlarged view of part A in the middle.
[0033] Explanation of reference numerals in the attached drawings: 1. Concave bank slope; 2. Toothed wall; 201. Anti-erosion wall; 3. Cylinder; 4. Rotating ring; 5. Fan blade; 6. First toothed rake claw; 7. Collection chamber; 8. Adjustment assembly; 81. Torsion spring; 82. Pull rope; 83. Retractor; 831. Connecting rod; 832. Drum; 833. Rack gear; 834. Rack plate; 9. Rotating shaft; 10. Second toothed rake claw; 11. Guide wall; 12. Counterweight; 13. Float; 14. Water passage hole; 15. Notch; 16. Guide ring; 17. Rotating rod; 18. Through hole. Detailed Implementation
[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0035] This application discloses a device for preventing erosion and damage in river bends. (See also...) Figure 1 The anti-scouring device for river bends includes a concave bank slope 1, on which a toothed wall 2 is installed. The toothed wall 2 includes multiple anti-scouring wall bodies 201 fixedly installed on the concave bank slope 1. The multiple anti-scouring wall bodies 201 are arranged sequentially at intervals in a vertical direction. The distance from the side of the anti-scouring wall body 201 near the convex bank slope to the side of the anti-scouring wall body 201 near the concave bank slope 1 increases sequentially from top to bottom. The anti-scouring wall bodies 201 extend from the concave bank slope 1 towards the direction of water flow. In this embodiment, the anti-scouring wall body 201 is a concrete wall installed on the concave bank slope 1; in other embodiments, it can also be a steel plate.
[0036] When the river water flows towards the concave bank slope 1, it impacts the scour protection wall 201 in advance. Under the action of the scour protection wall 201, the water flows downward. Then, after being blocked by the lower scour protection wall 201, the water flow is refracted, changing the direction of the water flow and guiding the downward-flowing water flow towards the convex bank slope of the river channel. This reduces the scour damage to the concave bank toe during the spiral advance of the water flow, which helps to improve the scour protection effect of the concave bank.
[0037] Reference Figure 2 and Figure 3A cylindrical body 3 is installed on the anti-erosion wall 201 on the side away from the riverbed. The longitudinal section of the cylindrical body 3 is circular, and the cylindrical body 3 extends towards the convex bank slope. The length direction of the cylindrical body 3 is perpendicular to the water flow direction. Multiple through holes 18 are opened on the cylindrical body 3 to help reduce the impact force of the river water on the cylindrical body 3. A rotating ring 4 is rotatably fitted on the cylindrical body 3. The rotation axis of the rotating ring 4 is parallel to the length direction of the cylindrical body 3. Multiple fan blades 5 are fixed at intervals along the circumference of the rotating ring 4. In this embodiment, four fan blades 5 are provided. In other embodiments, the number of fan blades 5 can be set as needed. The fan blades 5 are used to contact the surface water flow. The cross-section of the fan blades 5 is rectangular. Two notches 15 are symmetrically opened along the center line on the side of the fan blades 5 near the cylindrical body 3. Multiple water passage holes 14 are opened on the fan blades 5. The notches 15 and water passage holes 14 help reduce the impact of the water flow on the fan blades 5 and extend the service life of the fan blades 5.
[0038] Reference Figure 3 and Figure 4 A first hooking component for hooking debris in the river channel is provided on the side of the fan blade 5 near the rotation direction. The first hooking component includes a first toothed rake 6 rotatably disposed on the side of the fan blade 5 near the rotation direction. The length direction of the first toothed rake 6 is parallel to the length direction of the cylinder 3. The rotation axis of the first toothed rake 6 is parallel to the rotation axis of the rotating ring 4. The longitudinal section of the first toothed rake 6 is V-shaped. The opening of the first toothed rake 6 is oriented towards the direction near the rotating ring 4. A rotating shaft 9 is fixedly inserted on the first toothed rake 6. The rotating shaft 9 is located on the side of the first toothed rake 6 near the rotating ring 4. The rotating shaft 9 rotates on the side of the fan blade 5 near the rotation direction.
[0039] Reference Figure 2 and Figure 3 A collection chamber 7 is provided on the side of the cylinder 3 away from the riverbed. The bottom wall of the collection chamber 7 gradually increases in the direction away from the concave bank slope 1. An adjustment component 8 is provided on the fan blade 5 to drive the first toothed rake claw 6 to rotate in the direction of approaching or moving away from the rotating ring 4. When the first toothed rake claw 6 moves above the collection chamber 7, the adjustment component 8 adjusts the first toothed rake claw 6 to rotate in the direction of approaching the rotating ring 4.
[0040] Reference Figure 3 and Figure 4To facilitate adjustment of the rotation of the first rake claw 6, the adjustment assembly 8 includes a torsion spring 81, a pull rope 82, and a retractor 83. The torsion spring 81 is movably sleeved on the rotating shaft 9. One end of the torsion spring 81 is fixed to the fan blade plate 5, and the other end is fixed to the first rake claw 6. The torsion spring 81 is used to drive the first rake claw 6 to rotate in a direction away from the rotating ring 4 so that one side wall of the first rake claw 6 abuts against the corresponding fan blade plate 5. The pull rope 82 is fixedly connected to the middle of the side of the first rake claw 6 away from the rotating shaft 9. A guide ring 16 is fixed to the middle of the side of the fan blade plate 5 near the first rake claw 6. The pull rope 82 slides through the corresponding guide ring 16. The pull rope 82 is used to pull the first rake claw 6 to rotate in a direction closer to the rotating ring 4.
[0041] Reference Figure 3 and Figure 4 The take-up and unwind component 83 is used to take up or unwind the pull rope 82. The take-up and unwind component 83 includes a connecting rod 831, a drum 832, a rack and pinion 833, and a rack plate 834. The connecting rod 831 is fixedly connected to the fan blade plate 5 away from the concave bank slope 1 (see reference). Figure 2 On one side of the cylinder 3, a rotating rod 17 is rotatably installed on the side away from the concave bank slope 1. The rotation axis of the rotating rod 17 is parallel to the rotation axis of the rotating ring 4. The rotating rod 17 and the rotating ring 4 are concentrically arranged. The end of the connecting rod 831 away from the fan blade plate 5 is fixed on the rotating rod 17. The length direction of the connecting rod 831 is perpendicular to the rotation axis of the rotating ring 4. The drum 832 is rotatably mounted on the side of the connecting rod 831 near the drum body 3. The rotation axis of the drum 832 is parallel to the length direction of the connecting rod 831. The pull rope 82 is wound around the drum 832 corresponding to the fan blade 5 on the side away from the first toothed rake 6. The rack gear 833 is coaxially mounted on the drum 832. The rack plate 834 is arc-shaped and is concentrically mounted with the rotating ring 4. The rack plate 834 is located on the side of the drum body 3 near the opening of the collection chamber 7. The rack gear 833 is used to mesh with the rack plate 834. When the fan blade 5 rotates, it drives the rack gear 833 to roll along the rack plate 834 in the direction of rotation. The drum 832 rotates to wind up the pull rope 82.
[0042] Reference Figure 3 and Figure 4 A second toothed rake 10 is fixedly connected to the side of the fan blade 5 away from the direction of rotation. The second toothed rake 10 is located on the side of the fan blade 5 away from the rotating ring 4. The longitudinal section of the second toothed rake 10 is V-shaped, and the opening of the second toothed rake 10 is set towards the direction of the fan blade 5. The distance from the side of the second toothed rake 10 away from the rotating ring 4 to the center of the cylinder 3 is greater than the distance from the side of the fan blade 5 away from the rotating ring 4 to the center of the cylinder 3. The second toothed rake 10 extends out of the fan blade 5. When the fan blade 5 drives the second toothed rake 10 to rotate, the second toothed rake 10 helps to entangle aquatic plants and other debris, making it difficult for aquatic plants and other debris to carry the mud and sand of the concave bank slope 1 downwards.
[0043] Reference Figure 2 and Figure 3 A guide wall 11 is fixedly installed on the anti-scour wall 201 on the side away from the riverbed. The guide wall 11 is set vertically, and a counterweight 12 is slidably installed along the length of the guide wall 11. The counterweight 12 is a dovetail block. The side of the cylinder 3 closest to the concave bank slope 1 is fixedly connected to the counterweight 12. A float plate 13 is connected to the bottom wall of the counterweight 12, and the bottom wall of the float plate 13 is located below the opening of the collection chamber 7. This allows the position of the cylinder 3 to be adjusted according to the actual water level, which helps to ensure that the river flow can drive the fan blade 5 to rotate.
[0044] The implementation principle of this application embodiment is as follows: when the river water in the river channel flows towards the concave bank, it will rush onto the anti-scour wall 201 in advance. The water flow flows downward under the obstruction of the anti-scour wall 201. Then, the water flow passes through the obstruction of the lower anti-scour wall 201, and is refracted, and the direction of the water flow changes, guiding the downward flowing water towards the convex bank of the river channel. This reduces the scour damage to the concave bank's toe protection during the water flow's forward movement, and helps to improve the anti-scour effect of the concave bank.
[0045] When the water flows towards the erosion control wall 201, it pushes the fan blades 5, causing the rotating ring 4 to rotate continuously. At this time, the first rake claw 6 and the second rake claw 10 continuously entangle and hook up water plants, plastic, and other debris in the river. As the first rake claw 6 rotates upward, it drives the drum 832 and the rack gear 833 to gradually approach the rack plate 834. Then, the rack gear 833 meshes with the rack plate 834. As the fan blades 5 continue to rotate, they drive the rack gear 833 to roll along the rack plate 834. The rack gear 833 drives the drum 832 to rotate and wind up the pull rope 82. The pull rope 82 pulls the first rake claw 6 to rotate towards the rotating ring 4. The opening of the first rake claw 6 gradually approaches the corresponding fan blade 5, making it difficult for the fan blade 5 to throw out plastic debris from the first rake claw 6 during rotation. When the fan blade 5 rotates to a vertical position above the cylinder 3, it helps the plastic debris on the first rake claw 6 fall into the collection chamber 7. The collection chamber 7 collects the hooked plastic debris. Under the action of the float 13, the debris in the collection chamber 7 is not easy to float out from the opening of the collection chamber 7, thus enabling a certain amount of hooking and collection of debris in the river channel. This makes it difficult for aquatic plants, plastic and other debris in the river channel to carry the silt and sand of the concave bank slope 1, further improving the anti-erosion effect of the concave bank slope 1.
[0046] When the fan blade 5 rotates downward, the fan blade 5 drives the rack gear 833 on the connecting rod 831 to gradually disengage from the rack plate 834. Then, the deformed torsion spring 81 drives the first toothed rake claw 6 to rotate away from the rotating ring 4, so that the first toothed rake claw 6 abuts against the corresponding fan blade 5, thereby facilitating the opening of the first toothed rake claw 6 to hook up debris in the water flow.
[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A device for preventing erosion and damage in river bends, characterized in that: The structure includes a concave bank slope (1), on which a toothed wall (2) is provided. The toothed wall (2) includes multiple erosion control walls (201) provided on the concave bank slope (1). The multiple erosion control walls (201) are arranged sequentially at intervals in the vertical direction. The distance between the side of the erosion control wall (201) closest to the convex bank slope and the side of the erosion control wall (201) closest to the concave bank slope (1) increases sequentially from top to bottom. The erosion control wall on the side furthest from the riverbed... (201) is provided with a cylinder (3) which extends toward the direction of the convex bank slope. A rotating ring (4) is rotatably sleeved on the cylinder (3). The rotation axis of the rotating ring (4) is parallel to the length direction of the cylinder (3). Multiple fan blades (5) are arranged at intervals along the circumference of the rotating ring (4). The fan blades (5) are used to contact the surface water flow. A first hooking element for hooking up river debris is provided on the side of the fan blade (5) near the rotation direction.
2. The anti-scouring and anti-damage device for river bends according to claim 1, characterized in that: The erosion protection wall (201) extends from the concave bank slope (1) toward the direction of water flow.
3. The anti-scouring and anti-damage device for river bends according to claim 1, characterized in that: The first hooking member includes a first toothed claw (6) disposed on the side of the fan blade plate (5) near the rotation direction, and the opening of the first toothed claw (6) is disposed in the direction close to the rotating ring (4).
4. The anti-scouring and anti-damage device for river bends according to claim 3, characterized in that: The first toothed rake claw (6) is rotatably disposed on the side of the fan blade plate (5) near the direction of rotation. The rotation axis of the first toothed rake claw (6) is parallel to the rotation axis of the rotating ring (4). A collection chamber (7) is provided on the side of the cylinder (3) away from the riverbed. An adjustment component (8) is provided on the fan blade plate (5) for driving the first toothed rake claw (6) to rotate toward or away from the rotating ring (4). When the first toothed rake claw (6) moves above the collection chamber (7), the adjustment component (8) adjusts the first toothed rake claw (6) to rotate toward the direction of the rotating ring (4) to reduce the opening range of the first toothed rake claw (6).
5. The anti-scouring and anti-damage device for river bends according to claim 4, characterized in that: A rotating shaft (9) is threaded through the first toothed rake claw (6), and the rotating shaft (9) rotates on the corresponding fan blade (5). The adjusting component (8) includes a torsion spring (81) sleeved on the rotating shaft (9), a pull rope (82) disposed on the side of the first toothed rake claw (6) away from the rotating shaft (9), and a winding and unwinding component (83) disposed on the cylinder (3). The torsion spring (81) is used to drive the first toothed rake claw (6) to rotate in a direction away from the rotating ring (4). The pull rope (82) is used to pull the first toothed rake claw (6) to rotate in a direction closer to the rotating ring (4). The winding and unwinding component (83) is used to wind up or unwind the pull rope (82).
6. The anti-scouring and anti-damage device for river bends according to claim 5, characterized in that: The take-up and take-down component (83) includes a connecting rod (831) mounted on the fan blade plate (5), a drum (832) rotatably mounted on the connecting rod (831), a rack gear (833) coaxially mounted on the drum (832), and a rack plate (834) mounted on the cylinder body (3). The length direction of the connecting rod (831) is perpendicular to the rotation axis of the rotating ring (4), and the rotation axis of the drum (832) is parallel to the length direction of the connecting rod (831). The drum (832) is located on the side of the connecting rod (831) closer to the rotating ring (4). The pull rope (82) is wound around the corresponding drum (832) on the side away from the first toothed claw (6). The rack plate (834) is arc-shaped and is concentrically arranged with the ring (4). The rack plate (834) is located on the side of the cylinder (3) near the collection chamber (7). The rack gear (833) is used to mesh with the rack plate (834). When the fan blade plate (5) rotates and drives the rack gear (833) to roll along the rack plate (834) in the direction of rotation, the drum (832) rotates to wind up the pull rope (82).
7. The anti-scouring and anti-damage device for river bends according to claim 1, characterized in that: The fan blade (5) is provided with a second toothed claw (10) on the side away from the rotation direction. The distance from the side of the second toothed claw (10) away from the rotating ring (4) to the center of the cylinder (3) is greater than the distance from the side of the fan blade (5) away from the rotating ring (4) to the center of the cylinder (3).
8. The anti-scouring and anti-damage device for river bends according to claim 1, characterized in that: A guide wall (11) is provided on the anti-scour wall (201) away from the riverbed. The guide wall (11) is set in the vertical direction. A counterweight (12) is slidably arranged in the guide wall (11) along the length direction. The counterweight (12) is connected to the cylinder (3). A float plate (13) is provided on the counterweight (12). The bottom wall of the float plate (13) is located below the opening of the collection chamber (7).
9. The anti-scouring and anti-damage device for river bends according to any one of claims 1-8, characterized in that: The fan blade plate (5) has multiple water passage holes (14).