A tidal power generation device for estuary groynes

Abstract

This invention provides a tidal energy generation device for a spur dike in an estuary, comprising a support section and a limiting section. The support section includes a support frame, a support rod, a connecting plate, and universal ball bearings. The support frame is fixedly installed on the upper side of the spur dike, above a rotating base. The support frame has an arc-shaped groove. The support rod is vertically installed above the rotating base and passes through the arc-shaped groove. The upper end of the support rod is fixedly connected to the connecting plate. Several universal ball bearings are fixedly installed on the lower side of the connecting plate. The ball heads of the universal ball bearings are in rolling engagement with the upper surface of the support frame. The universal ball bearings are located on both sides of the arc-shaped groove. The limiting section is fixedly installed on the spur dike. This invention integrates a tidal energy generation device into the estuary spur dike, achieving integrated water conservancy management and clean power generation. It does not occupy river space and utilizes a floating platform and drive blades to simultaneously utilize tidal potential energy, improving energy utilization efficiency.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology, and in particular relates to a tidal power generation device for estuary groynes. Background Technology

[0002] Groynes are commonly used bank protection structures in river mouths and river channel management. They are mainly used to constrict water flow, protect embankments, adjust flow patterns, and stabilize river course. Traditional groynes only have water control functions and have a single structural function. They cannot recover and utilize the energy of tidal currents and reciprocating water flows acting on the dam body, resulting in the waste of natural clean energy.

[0003] The tidal currents in estuaries are characterized by reciprocating flow, large water level fluctuations, and unstable flow direction. Existing tidal power generation devices are mostly independently deployed, exhibiting poor compatibility with groynes and problems such as large installation space requirements, complex construction, susceptibility to damage from water flow impacts, and difficult maintenance. Some power generation devices that attempt to integrate with hydraulic structures can only adapt to unidirectional flow, and are prone to reverse rotation, transmission jamming, and discontinuous power generation under reciprocating tidal currents, resulting in low energy capture efficiency. Furthermore, they cannot adjust the angle and height according to the tidal direction and water level fluctuations, making them unsuitable for the complex conditions of estuaries and lacking long-term operational reliability.

[0004] Therefore, developing a tidal energy generation device that can be integrated into estuary groynes, adapts to reciprocating tidal currents, has adjustable angle and height, provides continuous and stable power generation, and has a compact and reliable structure has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a tidal power generation device for estuary groynes, which solves the technical problems of poor adaptability and low energy capture efficiency of traditional power generation devices in the prior art.

[0006] To achieve the above and other related objectives, the present invention provides a tidal power generation device for a spur dike in an estuary, comprising a spur dike, the spur dike being linearly arranged on both sides of a river channel, the length of the spur dike being set according to the actual conditions of the river channel, a rotating groove being provided at the front end of the spur dike, a rotating seat being provided in the rotating groove via an angle adjustment mechanism, the rotating seat having an installation cavity, a conversion component being provided in the installation cavity, the conversion component being movable up and down within the installation cavity via a lifting mechanism; An auxiliary rotating mechanism is also provided on the groyne. The auxiliary rotating mechanism includes a support part and a limiting part. The support part includes a support frame, a support rod, a connecting plate, and universal balls. The support frame is fixedly installed on the upper side of the groyne, located above the rotating seat. The support frame has an arc-shaped groove. The support rod is vertically installed above the rotating seat and passes through the arc-shaped groove. The upper end of the support rod is fixedly connected to the connecting plate. There are several universal balls, which are fixedly installed on the lower side of the connecting plate and vertically downward. The ball heads of the universal balls are in rolling engagement with the upper surface of the support frame. The universal balls are located on both sides of the arc-shaped groove. The limiting part is fixedly installed on the groyne and cooperates with the angle adjustment mechanism. The reversing mechanism is connected to the power input shaft of the generator, which is located on top of the mounting bracket.

[0007] In this way, the power generation device is integrated at the front end of each groyne. The groynes and power generation devices are set according to the actual length of the river channel, realizing the integration of groyne regulation and tidal power generation. The support part can support the rotating seat, making it easier for the rotating seat to change its angle through the angle adjustment mechanism, so that the conversion component can better adapt to different water flow environments. The limiting part further prevents the rotating seat from changing its angle under the impact of water flow, thus limiting the rotating seat.

[0008] Optionally, the angle adjustment mechanism includes an adjustment shaft and a drive motor. The adjustment shaft is vertically fixed on the rotating seat, and both ends of the adjustment shaft are rotatably engaged with the groyne via bearings. The rotating groove is L-shaped and faces the river channel. The sidewall of the rotating groove and the rotating seat have mutually engaging arc-shaped surfaces, which slide together in contact. The drive motor is fixedly mounted on the groyne, and its output end is connected to the upper end of the adjustment shaft via a pulley mechanism. The drive mechanism drives the rotating seat to rotate. Automatic angle adjustment of the rotating seat is achieved through the adjustment shaft, drive motor, and arc-shaped mating surfaces. The angle of the power generation component can be adjusted in real time according to the tidal flow direction to maximize the capture of tidal energy. The adjustment is smooth, the positioning is reliable, and it adapts to various flow directions.

[0009] Optionally, the limiting part is disposed between the drive motor and the adjusting shaft. The limiting part includes a limiting frame, a limiting block, and an electric push rod. The limiting frame is fixedly installed on the groyne. The limiting block is horizontally slidably inserted into the limiting frame. The electric push rod is fixedly installed on the limiting frame. The actuating end of the electric push rod is fixedly connected to the end of the limiting block away from the adjusting shaft. The two sides of the end of the limiting block near the adjusting shaft are close to each other to form a straight prism. The pulley mechanism has a gear fixedly installed on the adjusting shaft. By using the electric push rod to push the limiting block to move on the limiting frame, the straight prism-shaped end of the limiting frame can abut against the two teeth of the gear, thereby preventing the gear from rotating and facilitating the fixing of the rotating seat in the rotating groove.

[0010] Optionally, the conversion assembly includes a mounting frame, a conversion mechanism, and a reversing mechanism. The mounting frame is installed in a mounting cavity and can move up and down within the mounting cavity. The conversion mechanism includes a first rotating shaft, a second rotating shaft, a drive blade, and a drive mechanism. The first rotating shaft is vertically rotatably installed in the mounting frame. The drive blade is linearly fixed in the axial direction of the first rotating shaft. The first rotating shaft is hollow. The second rotating shaft is coaxially rotatably installed in the first rotating shaft via bearings. The two ends of the second rotating shaft are located outside the two ends of the first rotating shaft. The upper ends of both the first and second rotating shafts are connected to the reversing mechanism, and the lower end of the second rotating shaft is connected to the drive mechanism. The reversing mechanism includes a first commutator, a second commutator, and an output shaft. The first commutator is located at the top end of the first rotating shaft, and the second commutator is located at the top end of the second rotating shaft. The output shaft is rotatably installed in the mounting frame, and both the first and second commutators are connected to the output shaft. By arranging the drive blades linearly along the axis of the first shaft and setting the drive mechanism, the first and second shafts can be fully utilized to capture tidal energy. The coaxial nested structure of the first and second shafts is compact, occupies little space, and has smooth transmission. The conversion component can be adjusted in height by the lifting mechanism. The reversing mechanism can convert reciprocating water flow into unidirectional rotation to drive the generator to generate electricity continuously. The overall structure is simple, highly adaptable, and stable in operation. The orientation and height of the conversion component can be adjusted by using the angle adjustment and lifting mechanism, making the conversion component more adaptable to different water flow environments. The reversing mechanism, which uses the first commutator, the second commutator, and the output shaft, can receive the power from the first and second shafts respectively and couple the output. The power transmission is smooth, the power integration effect is good, and it can stably output power to the generator regardless of forward or reverse rotation.

[0011] Optionally, both the first commutator and the second commutator include a mounting base, a commutator shaft, bevel gears, and an overrunning clutch. The commutator shaft and the bevel gears are rotatably mounted on the mounting base. The bevel gears are symmetrically arranged on both sides of the commutator shaft, and the axes of the bevel gears and the axis of the commutator shaft are perpendicular to each other. The commutator shaft meshes with the bevel gears on both sides. The overrunning clutches are coaxially mounted in the mounting holes of the bevel gears and on the commutator shaft. The two overrunning clutches in the two bevel gears have opposite locking directions, and the two overrunning clutches on the two commutator shafts have the same locking direction. The upper end of the first rotating shaft is mounted in the first commutator through the overrunning clutch, and the upper end of the second rotating shaft is mounted in the second commutator through the overrunning clutch. By setting overrunning clutches with opposite locking directions inside the bevel gears of the first or second commutator, the characteristics of the overrunning clutches ensure that the commutator shaft always rotates in the same direction, regardless of whether the first or second shaft rotates clockwise or counterclockwise. By setting overrunning clutches with the same locking direction on the commutator shafts of the first and second commutators, the two power paths do not interfere with each other and work together to drive the output shaft to rotate stably.

[0012] Optionally, the axis of the output shaft is parallel to the axis of the commutation shaft, and there is a meshing gear between the overrunning clutch on the commutation shaft and the output shaft. The end of the output shaft away from the commutator is fixedly connected to the power input shaft of the generator. Utilizing the overrunning clutch, when the upper and lower commutation shafts rotate independently at different speeds or in different directions, the two power paths do not interfere with each other, and work together to drive the output shaft to rotate stably, thanks to the one-way slippage characteristic of the overrunning clutch.

[0013] Optionally, the drive mechanism includes a base, a floating platform, and an elastic reset part. The base is hollow inside and has a mounting groove, and is fixedly installed at the bottom of the mounting frame. The lower end of the second rotating shaft passes through the upper side of the base and is located in the mounting groove. The second rotating shaft and the base are sealed and rotatably connected. The floating platform is set on the side of the mounting frame facing the river channel via a swing frame and is located above the mounting base. One end of the elastic reset part is connected to the floating platform, and the other end is slidably disposed in the mounting groove of the base. The floating platform swings on the swing frame under the action of tides, and the swinging floating platform drives the elastic reset part to drive the second rotating shaft to rotate. The swinging of the floating platform drives the elastic reset part to drive the second rotating shaft to rotate, thereby driving the power input shaft of the generator to rotate, realizing energy conversion.

[0014] Optionally, the elastic reset part includes a sliding frame, a spring, and a connecting rope. One end of the sliding frame is slidably disposed in the mounting groove via a linear slide rail module. The other end of the sliding frame has a sliding shaft. The end of the sliding shaft away from the sliding frame passes through the base and is slidably and sealed to the base. The spring is disposed in the mounting groove, with one end fixedly connected to the mounting groove and the other end fixedly connected to the sliding frame. A fixing plate is fixedly disposed on the side of the mounting groove facing the river channel. A fixed pulley is disposed on the upper side of the fixing plate. One end of the connecting rope is fixedly connected to the sliding shaft, passes through the fixed pulley, and is fixedly connected to the floating platform. A rack is fixedly disposed on the sliding frame. The length direction of the rack is parallel to the sliding direction of the sliding frame. A gear that meshes with the rack is disposed on the second rotating shaft. When the floating platform swings, the connecting rope can pull the sliding shaft and its sliding frame to move. During the swing, when the connecting rope is not under force, the sliding frame is reset by the spring. The connecting rope and the spring enable the sliding frame to reciprocate. The sealed sliding connection between the sliding shaft and the mounting groove can keep the mounting groove dry, waterproof and sandproof, facilitate the rotation of the second rotating shaft, and increase its service life. Using the gear and rack connection, when the sliding frame moves, the rack drives the gear to rotate, thereby driving the second rotating shaft to rotate, and then driving the power input shaft of the generator to rotate, realizing energy conversion.

[0015] Optionally, the swing frame includes a fixed arm and a swing arm, which are symmetrically arranged on both sides of the mounting frame. The fixed arm is fixedly mounted on the mounting frame, and one end of the swing arm is rotatably mounted on the fixed arm, while the other end faces upward and is hinged to the floating platform. The symmetrical arrangement of the fixed arm and the swing arm forms a stable swing support, and the hinged installation of the floating platform allows it to swing freely with the tides, resulting in uniform force distribution and smooth movement, effectively improving the stability and service life of the drive mechanism.

[0016] Optionally, a limit block is vertically installed inside the mounting cavity, and a limit groove is provided on the mounting frame corresponding to the limit block. The lifting mechanism drives the mounting frame to slide up and down along the limit block. The lifting mechanism includes an electric push rod, which is vertically fixedly installed on the rotating seat and located above the mounting frame. The actuating end of the electric push rod is fixedly connected to the mounting frame. The use of the electric push rod in conjunction with the limit block and limit groove achieves stable lifting and lowering of the mounting frame. It can automatically adjust the depth of the drive blades into the water according to the rise and fall of the water level, ensuring that the blades are in the optimal working position at different water levels. The lifting and lowering are smooth, the positioning is precise, and the control is simple.

[0017] The beneficial effects of this invention are as follows: This invention integrates a tidal energy generation device into a spur dike in an estuary, achieving integrated water conservancy management and clean power generation without occupying river space. The drive blades are linearly arranged along the axis of rotation, and the floating platform and elastic reset mechanism efficiently capture tidal energy, improving energy utilization. The coaxial nested shaft structure is compact and provides smooth transmission. The commutation mechanism uses a double commutator and a reverse overrunning clutch to convert reciprocating water flow into unidirectional rotation, preventing jamming and ensuring continuous and stable power generation. Angle adjustment and electric lifting can adapt to changes in flow direction and water level. The protective net is pollution-proof and impact-resistant. The overall operation is reliable and maintenance is simple, significantly improving the comprehensive benefits of the spur dike. Attached Figure Description

[0018] Figure 1 The diagram shown is a schematic representation of the overall structure of the present invention.

[0019] Figure 2 Displayed as Figure 1 A schematic diagram of a set of power generation devices.

[0020] Figure 3 Displayed as Figure 2 A schematic diagram of the structure after removing some components.

[0021] Figure 4 Displayed as Figure 2 A schematic diagram of the structure after removing some components.

[0022] Figure 5 Displayed as Figure 2 A schematic diagram of the structure after removing some components.

[0023] Figure 6 The diagram shows the structure of the conversion component.

[0024] Figure 7 The diagram shown is a structural schematic of the reversing mechanism.

[0025] Figure 8 The diagram shown is a partial structural schematic of the drive mechanism.

[0026] Figure 9 The diagram shown is a structural schematic of the limiting part. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0028] Please see Figures 1 to 9It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0029] like Figures 1-9 As shown, a tidal power generation device for a groynes in an estuary includes a groynes 1, which are located on both sides of a river channel. The length and number of groynes 1 are determined according to the width of the river channel. A rotating groove 1001 is provided at the front end of the groynes 1. A rotating seat 11 is rotatably mounted in the rotating groove 1001 via an angle adjustment mechanism 5. An installation cavity 1101 is provided on the rotating seat 11. A conversion component is mounted in the installation cavity 1101 via a lifting mechanism 6.

[0030] In this embodiment, the angle adjustment mechanism 5 includes an adjustment shaft 51 and a drive motor 52. The adjustment shaft 51 is vertically arranged, passes through the rotating seat 11 and is fixedly connected to the rotating seat 11. Both ends of the adjustment shaft 51 are rotatably mounted in the rotating groove 1001 through rolling bearings. The drive motor 52 is fixedly mounted on the groyne 1. The output end of the drive motor 52 is connected to the adjustment shaft 51 through a pulley mechanism 53. The drive motor 52 drives the adjustment shaft 51 to rotate, thereby causing the rotating seat 11 to rotate and realizing the adjustment of the angle of the rotating seat 11. The rotating seat 11 and the rotating groove 1001 are fitted and slidably arranged.

[0031] Specifically, the rotating groove 1001 is L-shaped, and the vertical side wall of the rotating groove 1001 and the rotating seat 11 have mutually cooperating arc surfaces. The two arc surfaces are slidably fitted together, which can prevent sand or other interference objects from getting stuck between the rotating groove 1001 and the rotating seat 11 and affecting the angle adjustment of the rotating seat 11.

[0032] In this embodiment, the conversion component includes a mounting frame 2, a conversion mechanism 3, and a reversing mechanism 4. The mounting frame 2 is installed in the mounting cavity 1101 and can move up and down within the mounting cavity 1101. The height of the mounting frame 2 can be adjusted according to the rise and fall of water level and changes in the dry and flood seasons, so that the conversion mechanism 3 can adapt to various working conditions and aquatic environments, making its application range wider. A protective net 21 is provided on the mounting frame 2 to prevent garbage or other floating objects from entering the mounting frame 2. The protective net 21 blocks water plants, debris, and silt from impacting and damaging the blades and internal components, improving the device's anti-fouling, anti-impact, and anti-entanglement capabilities, reducing the failure rate, and extending the underwater operating life.

[0033] In this embodiment, a limiting block 1102 is vertically arranged in the mounting cavity 1101, and a limiting groove 22 is provided in the mounting frame 2 corresponding to the limiting block 1102. Through the action of the lifting mechanism 6, the mounting frame 2 slides up and down along the limiting block 1102. The lifting mechanism 6 can be an electric push rod 61. The electric push rod 61 is fixedly installed in the rotating seat 11 in the vertical direction, with the actuating end facing down and fixedly connected to the mounting frame 2. When the electric push rod 61 is started, it drives the mounting frame 2 to move up and down.

[0034] In this embodiment, the conversion mechanism 3 includes a first rotating shaft 31, a second rotating shaft 32, drive blades 33, and a drive mechanism 34. The first rotating shaft 31 is a hollow shaft, vertically rotatably mounted in the mounting frame 2. Several drive blades 33 are linearly fixedly mounted on the first rotating shaft 31 along its axial direction. The linearly arranged drive blades 33 allow for adjustment of the water depth of the drive blades 33 according to water level fluctuations and changes in the dry and flood seasons. The second rotating shaft 32 is coaxially rotatably mounted in the first rotating shaft 31 via bearings, and both ends of the second rotating shaft 32 are longer than the first rotating shaft 31. The lower end of the second rotating shaft 32 is connected to the drive mechanism 34. The commutation mechanism 4 includes an output shaft 41, a first commutator 42, and a second commutator 43. The output shaft 41 is rotatably mounted on the mounting frame 2. One end of the output shaft 41 is connected to the power input shaft of the generator, and the other end is respectively engaged with the first commutator 42 and the second commutator 43. The first commutator 42 engages with the first rotating shaft 31, and the second commutator 43 engages with the first rotating shaft 31. Commutator 43 cooperates with second shaft 32, and drive mechanism 34 is connected to the lower end of second shaft 32. Under the action of tidal energy, drive mechanism 34 and drive blade 33 drive first shaft 31 and second shaft 32 to rotate. When first shaft 31 and second shaft 32 rotate forward or backward, through the action of first commutator 42 and second commutator 43, output shaft 41 always outputs in one direction. Output shaft 41 can be connected to the power input shaft of generator, which facilitates generator operation and improves power generation continuity and device service life.

[0035] Specifically, the first commutator 42 and the second commutator 43 have the same structure, both including a mounting base 421, a commutation shaft 422, a bevel gear 423, and an overrunning clutch 424. The mounting base 421 is fixedly mounted on the mounting bracket 2. The commutation shaft 422 and the bevel gear 423 are both rotatably mounted on the mounting base 421. The commutation shaft 422 is horizontally arranged and parallel to the output shaft 41. The commutation shafts 422 of the first commutator 42 and the second commutator 43 are located on the upper and lower sides of the output shaft 41, respectively. The bevel gear 423 is vertically positioned... The two overrunning clutches 424 are symmetrically arranged on both sides of the reversing shaft 422 in the direction of rotation. The end of the reversing shaft 422 near the bevel gear 423 has bevel teeth that mesh with the two bevel gears 423 at the same time. The bevel gear 423 is coaxially arranged with the first rotating shaft 31. The overrunning clutches 424 are respectively installed in the mounting holes of the bevel gear 423 and sleeved on the reversing shaft 422. The locking directions of the two overrunning clutches 424 located in the bevel gear 423 are opposite, and the locking directions of the overrunning clutches 424 on the reversing shaft 422 of the first reversing unit 42 and the second reversing unit 43 are the same. Specifically, the upper end of the first rotating shaft 31 is connected to two bevel gears 423 of the first commutator 42 via an overrunning clutch 424, and the upper end of the second rotating shaft 32 is connected to two bevel gears 423 of the second commutator 43 via an overrunning clutch 424. Two bevel gears 423 are coaxially arranged on the first rotating shaft 31 or the second rotating shaft 32, and overrunning clutches 424 with opposite rotation directions are installed in the two bevel gears 423 respectively; the two bevel gears 423 mesh together with the bevel gear of the commutator shaft 422 whose axis is perpendicular to the shaft. When the shaft rotates forward or backward, the two overrunning clutches 424 alternately lock the transmission, so that the commutator shaft 422 always maintains rotation in a single direction.

[0036] Specifically, the commutation shafts 422 of the first commutator 42 and the second commutator 43 are simultaneously engaged with the output shaft 41 through the overrunning clutch 424. The overrunning clutch 424, which has the same locking direction, allows the two power paths to not interfere with each other when the rotation speeds are different, and to work together to drive the output shaft 41 to rotate stably.

[0037] In this embodiment, the drive mechanism 34 includes a base 341, a floating platform 342, a sliding frame 343, a spring 344, and a connecting rope 345. The base 341 is horizontally and fixedly installed at the bottom of the mounting frame 2, and has a hollow interior with a mounting groove 3411. The mounting groove 3411 is horizontally positioned and faces the river channel. The lower end of the second rotating shaft 32 passes through the upper side of the base 341 and is located in the mounting groove 3411. The second rotating shaft 32 and the base 341 are sealed and rotatably connected. The sliding frame 343 is movably arranged along the length direction of the mounting groove 3411 via a linear slide rail mechanism 346. A rack 3431 is provided on the sliding frame 343, and the lower end of the second rotating shaft 32 has a gear 321 that meshes with the rack 3431. During the movement of the sliding frame 343, the second rotating shaft 32 can be driven to rotate. One end of the spring 344 is fixedly installed in the mounting groove 3411, and the other end is fixedly connected to the sliding frame 343. The sliding frame 343 has a horizontally positioned sliding shaft 3432 at the end facing the river channel. The sliding shaft 3432 passes through the base 341 and is slidably connected to the base 341. A fixing plate 3412 is provided on the outer side of the base 341 facing the river channel. A fixed pulley 3413 is installed on the fixing plate 3412. One end of the connecting rope 345 is fixedly connected to the end of the sliding shaft 3432 located outside the mounting groove 3411, and the other end is connected to the floating platform 342 after cooperating with the fixed pulley 3413. The floating platform 342 swings on the water surface, pulling the sliding frame 343 to move through the connecting rope 345. When the connecting rope 345 is not under force, the sliding frame 343 is reset by the spring 344. Therefore, the sliding frame 343 can reciprocate through the tidal energy, thereby driving the second rotating shaft 32 to rotate through the rack 3431 and gear 321.

[0038] Specifically, the floating platform 342 is mounted on the side of the mounting frame 2 facing the river channel via a fixed arm 3421 and a swing arm 3422. The fixed arm 3421 and the swing arm 3422 are symmetrically arranged. The fixed arm 3421 is horizontally mounted on the mounting frame 2 facing the river channel and located on both sides of the mounting frame 2. The lower end of the swing arm 3422 is rotatably connected to the fixed arm 3421, and the upper end of the swing arm 3422 is hinged to the floating platform 342. The fixed arm 3421 and the swing arm 3422 facilitate the swinging of the floating platform 342 on the water surface under the action of tides.

[0039] In this embodiment, to facilitate the rotation and fixation of the rotating seat 11, a support part 7 and a limiting part 8 are also provided. The support part 7 includes a support frame 71, support rods 72, a connecting plate 73, and universal ball bearings 74. The support frame 71 is fixedly installed on the groyne 1 and is mounted above the rotating seat 11. The support frame 71 has an arc-shaped groove 711, the center of which is on the axis of the adjusting shaft 51. Two support rods 72 are vertically spaced apart, and their lower ends are fixedly connected to the upper end of the rotating seat 11. The upper end passes through the arc-shaped groove 711 and is located above the support frame 71. The connecting plate 73 is fixedly connected to the upper ends of the two support rods 72. The universal ball bearing 74 is vertically fixedly installed on the lower side of the connecting plate 73. The ball head of the universal ball bearing 74 is rolled and engaged with the upper surface of the support frame 71. Several universal balls bearing 74 are provided and distributed on both sides of the arc-shaped groove 711. Through the support of the support part 7, the angle adjustment mechanism 5 can drive the rotating seat 11 to rotate, so that the conversion component can better adapt to different water flow environments.

[0040] Specifically, the limiting part 8 includes a limiting frame 81, a limiting block 82, and an electric push rod 83. The limiting frame 81 is fixedly installed on the groyne 1. The limiting block 82 is horizontally slidably inserted into the limiting frame 81. The electric push rod 83 is fixedly installed on the limiting frame 81. The actuating end of the electric push rod 83 is fixedly connected to the end of the limiting block 82 away from the adjusting shaft 51. When the electric push rod 83 is actuated, it drives the limiting block 82 to move toward the adjusting shaft 51 on the limiting frame 81. The two sides of the end of the limiting block 82 near the adjusting shaft 51 are close to each other to form a straight prism. The straight prism-shaped end can abut against the gear in the pulley mechanism 53 and abut against the two teeth of the gear, thereby locking the gear and further preventing the adjusting shaft 51 from rotating. This makes the position of the rotating seat 11 more stable when it needs to be fixed, and avoids the angle from changing under the impact of water flow.

[0041] This invention integrates a tidal power generation device at the front end of a groyne in an estuary, achieving integrated functions of groyne water conservancy management and tidal power generation. It does not occupy additional river space and does not affect the normal use of the groyne. The drive blades are linearly arranged along the axis of the first rotating shaft to capture tidal energy at different water depths. The coaxial nested first and second rotating shafts result in a compact overall structure, smooth transmission, and minimal space occupation. The conversion component can flexibly adjust its entry depth according to water level fluctuations via a lifting mechanism, adapting to various operating conditions such as dry and flood seasons. The commutation mechanism employs a double commutator, symmetrical bevel gears, and a reverse locking overrunning clutch design, reliably converting the bidirectional rotation generated by the reciprocating tidal current into unidirectional continuous rotation, avoiding reverse rotation, idling, and transmission jamming, ensuring continuous and stable power generation. The drive mechanism utilizes a floating platform... The combination of the swing frame and the elastic reset part can simultaneously absorb tidal energy and tidal potential energy, further improving energy utilization. The sliding frame, rack, gear and sealing structure work together to make the transmission sensitive, waterproof and sandproof, and adaptable to the complex environment of the estuary with a lot of sediment. The angle adjustment mechanism can automatically adjust the angle of attack according to the real-time flow direction to maximize the energy capture efficiency. The electric push rod and the limit structure work together to realize the smooth and precise lifting of the mounting frame. The protective net can effectively block the impact of water plants, debris and sediment, and improve the device's anti-entanglement and anti-impact capabilities. The overall device has a reasonable structure, reliable operation and simple installation and maintenance. It can work stably in the estuarine environment for a long time, converting clean and renewable tidal energy into electrical energy. It has protective, energy and economic benefits, and greatly improves the comprehensive utilization value of the estuarine groynes.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A tidal power generation device for a groynes in river estuaries, comprising groynes linearly arranged on both sides of a river channel, the length of which is determined according to the actual conditions of the river channel, characterized in that: The front end of the groyne is provided with a rotating groove, and a rotating seat is provided in the rotating groove through an angle adjustment mechanism. The rotating seat has a mounting cavity, and a conversion component is provided in the mounting cavity. The conversion component is mounted in the mounting cavity by a lifting mechanism. An auxiliary rotating mechanism is also provided on the groyne. The auxiliary rotating mechanism includes a support part and a limiting part. The support part includes a support frame, a support rod, a connecting plate, and universal balls. The support frame is fixedly installed on the upper side of the groyne, located above the rotating seat. The support frame has an arc-shaped groove. The support rod is vertically installed above the rotating seat and passes through the arc-shaped groove. The upper end of the support rod is fixedly connected to the connecting plate. There are several universal balls, which are fixedly installed on the lower side of the connecting plate and vertically downward. The ball heads of the universal balls are in rolling engagement with the upper surface of the support frame. The universal balls are located on both sides of the arc-shaped groove. The limiting part is fixedly installed on the groyne and cooperates with the angle adjustment mechanism.

2. The tidal power generation device for estuary groynes according to claim 1, characterized in that: The angle adjustment mechanism includes an adjustment shaft and a drive motor. The adjustment shaft is vertically fixed on the rotating base. Both ends of the adjustment shaft are rotatably connected to the groyne via bearings. The rotating groove is L-shaped and faces the river channel. The sidewall of the rotating groove and the rotating base have mutually mating arc-shaped surfaces, which slide together in contact. The drive motor is fixedly installed on the groyne. The output end of the drive motor is connected to the upper end of the adjustment shaft via a pulley mechanism. The drive mechanism can drive the rotating base to rotate.

3. The tidal power generation device for estuary groynes according to claim 2, characterized in that: The limiting part is disposed between the drive motor and the adjusting shaft. The limiting part includes a limiting frame, a limiting block and an electric push rod. The limiting frame is fixedly installed on the groyne. The limiting block is horizontally slidably inserted into the limiting frame. The electric push rod is fixedly installed on the limiting frame. The actuating end of the electric push rod is fixedly connected to the end of the limiting block away from the adjusting shaft. The two sides of the end of the limiting block near the adjusting shaft are close to each other to form a straight prism.

4. The tidal power generation device for estuary groynes according to claim 1, characterized in that: The conversion assembly includes a mounting frame, a conversion mechanism, and a commutation mechanism. The mounting frame is installed in a mounting cavity and can move up and down within the cavity. The conversion mechanism includes a first rotating shaft, a second rotating shaft, drive blades, and a drive mechanism. The first rotating shaft is vertically rotatably installed in the mounting frame. The drive blades are linearly fixed along the axial direction of the first rotating shaft. The first rotating shaft is hollow. The second rotating shaft is coaxially rotatably installed in the first rotating shaft via bearings. The two ends of the second rotating shaft are located outside the two ends of the first rotating shaft. The upper ends of both the first and second rotating shafts are connected to the commutation mechanism, and the lower end of the second rotating shaft is connected to the drive mechanism. The commutation mechanism includes a first commutator, a second commutator, and an output shaft. The first commutator is located at the top of the first rotating shaft, and the second commutator is located at the top of the second rotating shaft. The output shaft is rotatably installed in the mounting frame. Both the first and second commutators are connected to the output shaft. The output shaft is connected to the power input shaft of the generator, and the generator is located at the top of the mounting frame.

5. The tidal power generation device for estuary groynes according to claim 4, characterized in that: Both the first commutator and the second commutator include a mounting base, a commutator shaft, bevel gears, and an overrunning clutch. The commutator shaft and the bevel gears are rotatably mounted on the mounting base. The bevel gears are symmetrically arranged on both sides of the commutator shaft, and the axes of the bevel gears and the axis of the commutator shaft are perpendicular to each other. The commutator shaft meshes with the bevel gears on both sides. The overrunning clutches are coaxially mounted in the mounting holes of the bevel gears and on the commutator shaft. The two overrunning clutches in the two bevel gears have opposite locking directions, and the two overrunning clutches on the two commutator shafts have the same locking direction. The upper end of the first rotating shaft is mounted in the first commutator through the overrunning clutch, and the upper end of the second rotating shaft is mounted in the second commutator through the overrunning clutch.

6. The tidal power generation device for estuary groynes according to claim 5, characterized in that: The axis of the output shaft is parallel to the axis of the commutation shaft. There is a meshing gear between the overrunning clutch on the commutation shaft and the output shaft. The end of the output shaft away from the commutator is fixedly connected to the power input shaft of the generator.

7. The tidal power generation device for estuary groynes according to claim 6, characterized in that: The driving mechanism includes a base, a floating platform, and an elastic reset part. The base is hollow inside and has a mounting groove, and is fixedly installed at the bottom of the mounting frame. The lower end of the second rotating shaft passes through the upper side of the base and is located in the mounting groove. The second rotating shaft and the base are sealed and rotatably connected. The floating platform is set on the side of the mounting frame facing the river channel via a swing frame and is located above the mounting base. One end of the elastic reset part is connected to the floating platform, and the other end is slidably set in the mounting groove of the base. The floating platform swings on the swing frame under the action of tides, and the swinging floating platform drives the elastic reset part to drive the second rotating shaft to rotate.

8. The tidal power generation device for estuary groynes according to claim 7, characterized in that: The elastic reset part includes a sliding frame, a spring, and a connecting rope. One end of the sliding frame is slidably mounted in the mounting groove via a linear slide rail module. The other end of the sliding frame has a sliding shaft. The end of the sliding shaft away from the sliding frame passes through the base and is slidably and sealed to the base. The spring is mounted in the mounting groove, with one end fixedly connected to the mounting groove and the other end fixedly connected to the sliding frame. A fixing plate is fixedly mounted on the side of the mounting groove facing the river channel. A fixed pulley is located on the upper side of the fixing plate. One end of the connecting rope is fixedly connected to the sliding shaft, passes through the fixed pulley, and is fixedly connected to the floating platform. A rack is fixedly mounted on the sliding frame. The length direction of the rack is parallel to the sliding direction of the sliding frame. A gear that meshes with the rack is mounted on the second rotating shaft.

9. The tidal power generation device for estuary groynes according to claim 8, characterized in that: The swing frame includes a fixed arm and a swing arm, which are symmetrically arranged on both sides of the mounting frame. The fixed arm is fixedly mounted on the mounting frame, and one end of the swing arm is rotatably mounted on the fixed arm, while the other end is positioned upward and hinged to the floating platform.

10. The tidal power generation device for estuary groynes according to claim 9, characterized in that: A limit block is vertically arranged inside the mounting cavity, and a limit groove is provided on the mounting frame corresponding to the limit block. The lifting mechanism drives the mounting frame to slide up and down along the limit block. The lifting mechanism includes an electric push rod, which is vertically fixedly installed on the rotating seat and located above the mounting frame. The actuating end of the electric push rod is fixedly connected to the mounting frame.

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