Wave energy power generation device based on breakwater

Abstract

The invention relates to the technical field of breakwaters, and discloses a breakwater-based wave power generation device which comprises a main shell, a first flow guide structure, a second flow guide structure and a generator impeller, a first water inlet and a water outlet are formed in one side of the main shell, the first flow guide structure is connected with the first water inlet, and a first water outlet is formed in the other end of the first flow guide structure; a second water inlet is formed in the upper portion of the main shell, the second flow guide structure is connected with the second water inlet, a second water outlet is formed in the other end of the second flow guide structure, and the first water outlet and the second water outlet face the generator impeller; the water flow driving force flowing out of the first water outlet and the water flow driving force flowing out of the second water outlet are arranged in the same direction in the circumferential direction of the generator impeller. The double-channel water inlet can effectively capture wave energy in different directions, the situation that part of wave energy crossing the breakwater is not utilized is avoided, driving force of the two water flows is superposed in the forward direction, the power generation running interruption duration of the impeller is shortened, and the wave energy utilization rate and the power generation efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of breakwaters, and in particular to a wave energy power generation device based on a breakwater. Background Art

[0002] A breakwater is a coastal protection project built in ports or nearshore waters. Its function is to resist wave invasion, maintain the stability of the waters in the port, and protect the coastline. At the same time, it can also reduce siltation in ports and waterways, thereby effectively improving water flow conditions in the waterway.

[0003] At present, the main types of breakwaters are sloped, upright and mixed. First, the sloped breakwater has a gentle slope on the seaward side, and waves climb, break and roll on the slope to consume wave energy. Second, the upright breakwater has a vertical wall on the seaward side, which mainly relies on the wall to reflect waves, but the waves will cause strong scouring at the bottom of the wall. Third, the hybrid breakwater combines the above two structures, with a riprap base or sloped embankment at the bottom and an upright wall at the top, which can dissipate and reflect wave energy and protect the foundation from scouring. In order to make full use of coastal wave energy, a design combining breakwaters and wave energy power generation was subsequently developed, which can convert wave energy into electricity and provide reliable power supply to ports and shore-based equipment.

[0004] Existing breakwater-type wave energy power generation devices use water from the seaward side to drive the generator impeller. However, the large kinetic energy of waves can easily flow over the breakwater, resulting in some wave energy not being utilized. Moreover, wave motion is cyclical, and water inflow from one side may cause the generator impeller's power generation operation to be interrupted, resulting in low wave energy utilization and low power generation efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that: the large kinetic energy of waves easily passes over the breakwater, resulting in part of the wave energy not being utilized, and the wave motion is periodic. Single-sided water inflow may cause the generator's impeller to interrupt its power generation operation, resulting in low wave energy utilization and low power generation efficiency.

[0006] In order to solve the above technical problems, the present invention provides a technical solution for a breakwater-based wave energy power generation device: the breakwater-based wave energy power generation device includes a main housing, a first flow guide structure, a second flow guide structure, and a generator impeller, wherein a housing cavity is provided in the main housing, and the first flow guide structure, the second flow guide structure, and the generator impeller are all disposed in the housing cavity; A first water inlet and a water outlet are provided at intervals on one side of the main housing, one end of the first flow guide structure is connected to the first water inlet, and the other end of the first flow guide structure is provided with a first water outlet, and the first water outlet is arranged toward the generator impeller; A second water inlet is also provided on the upper part of the main shell, one end of the second flow guide structure is connected to the second water inlet, and the other end of the second flow guide structure is provided with a second water outlet, and the second water outlet is arranged toward the generator impeller; the water flow from the first water outlet to the generator impeller has a first driving force, and the water flow from the second water outlet to the generator impeller has a second driving force, and the first driving force and the second driving force are arranged in the same direction along the circumferential direction of the generator impeller.

[0007] Furthermore, a confluence trough is provided on the upper portion of the main shell, a confluence inlet is provided on a side of the confluence trough close to the first water inlet, and the second water inlet is located on a side of the confluence trough away from the confluence inlet.

[0008] Furthermore, a water retaining wall is protruding from the upper part of the main shell, and the water retaining wall is arranged on the outside of the confluence trough. The main shell is also provided with a water guide slope corresponding to the confluence inlet, and the water guide slope is arranged lower than the water retaining wall; from the confluence inlet to the second water inlet, the water guide slope is arranged in a gradually decreasing height.

[0009] Furthermore, the rotation axis of the generator impeller is arranged in the vertical direction, and the rotation axis of the generator impeller is located in the middle of the vertical projection of the accommodating cavity, and the first water outlet and the second water outlet are centrally symmetrical about the generator impeller.

[0010] Furthermore, the second flow-guiding structure is an L-shaped flow-guiding pipe, which includes a vertical section and a horizontal section that are fixedly connected. The vertical section is connected to the second water inlet, and the second water outlet is arranged at the end of the horizontal section.

[0011] Furthermore, the first flow-guiding structure is a trumpet-shaped structure, and the cross-sectional area of the inner channel of the first flow-guiding structure is gradually reduced from the first water inlet to the first water outlet.

[0012] Furthermore, the breakwater-based wave energy power generation device further includes a generator body, a rotating shaft, and an impeller housing, wherein the generator body is mounted on the upper portion of the accommodating cavity, the generator impeller is spaced apart and arranged on the lower side of the generator body, and the rotating shaft is fixedly connected between the generator impeller and the generator body, and the impeller housing is mounted on the outer side of the generator impeller; The breakwater-based wave energy power generation device also includes a drainage structure, which is arranged in the accommodating cavity and located on the lower side of the generator impeller. One end of the drainage structure is connected to the drainage port, and the other end of the drainage structure is provided with a water collection port, which is connected to the lower space of the generator impeller.

[0013] Furthermore, the drainage structure is a curved drainage pipe, the water collection port is connected to the impeller housing, and the height of the drainage structure is gradually reduced from the water collection port to the drainage port; the drainage structure is also installed with a one-way valve near the drainage port, and the one-way valve is set to be unidirectionally conductive along the direction from the water collection port to the drainage port.

[0014] Furthermore, the one-way valve includes a valve seat, a plurality of valve cores and a plurality of elastic members, wherein the valve seat is fixedly arranged inside the drainage structure, the valve seat has a hollow channel, and the plurality of valve cores are arranged in the hollow channel and arranged in sequence along the length direction of the drainage port; The elastic member is arranged on a side of the valve core close to the drain outlet, and a flange is further provided on a side of the valve seat away from the drain outlet, and the plurality of valve cores are respectively press-fitted with the flanges.

[0015] Furthermore, the drainage structure is also provided with a first water level probe and a second water level probe. The first water level probe is arranged close to the drain outlet, and the second water level probe is arranged higher than the first water level probe. The first water level probe and the second water level probe are respectively used to detect the water level so as to issue a blockage alarm signal when the water level is detected at the same time.

[0016] Compared with the prior art, the breakwater-based wave energy power generation device of the present invention has the following beneficial effects: the breakwater-based wave energy power generation device adopts a design form of a main shell, a first flow guide structure, a second flow guide structure and a generator impeller, and the first flow guide structure, the second flow guide structure and the generator impeller are all arranged in the accommodating cavity; a first water inlet and a discharge outlet are provided at intervals above and below one side of the main shell, the first flow guide structure is connected to the first water inlet, a second water inlet is provided on the upper part of the main shell, the second flow guide structure is connected to the second water inlet, and the first water outlet of the first flow guide structure and the second water outlet of the second flow guide structure are both arranged towards the generator impeller.

[0017] The first water inlet, located on the side, is used to capture the horizontal forward flow when waves impact the breakwater, while the second water inlet, located at the top, is used to capture the high-level water flow when waves pass over the breakwater. High-level water flow includes crest overflow, wave splashing, and falling water. Based on the first and second water inlets, the first and second diversion structures are combined to form a dual-channel water inlet path, which can effectively capture wave energy from different directions, preventing some wave energy that passes over the breakwater from being unused, significantly widening the device's response window to waves, and fully utilizing energy at different stages and locations in the wave cycle.

[0018] Furthermore, the first water outlet of the first flow-guiding structure and the second water outlet of the second flow-guiding structure are both positioned toward the generator impeller, ensuring that the water flow efficiently and accurately impacts the generator impeller, maximizing the conversion of the water flow's kinetic energy into mechanical energy for impeller power generation. More crucially, when the water flows out of the first and second water outlets, they respectively generate a first driving force and a second driving force. These two driving forces are arranged in the same direction along the circumference of the generator impeller, meaning that the driving forces generated by the two water flows are positively superimposed, effectively increasing the total torsion that drives the generator impeller to rotate. This also reduces the duration of impeller power generation interruptions caused by the periodicity of wave motion, thereby improving wave energy utilization and power generation efficiency. The power generation components are integrated into the housing cavity of the main shell, minimizing damage from the impact of huge waves in extreme sea conditions, thereby achieving the dual purpose of utilizing the main function of the breakwater and wave power generation.

[0019] In addition, a drainage structure is provided within the accommodating chamber, located below the generator impeller. The drainage structure's water collection port communicates with the space below the generator impeller, and the other end of the drainage structure leads to a drain outlet. After water impacts the generator impeller, it naturally flows into the water collection port under the action of gravity, and then rapidly exits the accommodating chamber through the drainage structure. This prevents water from accumulating in the accommodating chamber and forming a dead zone. This maintains the pressure differential from the first water inlet and outlet to the drain outlet, as well as the pressure differential from the second water inlet and outlet to the drain outlet. This ensures continuous water inflow and flow field stability through efficient drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an axonometric schematic diagram of a wave energy power generation device based on a breakwater according to an embodiment of the present invention; Figure 2 is a three-dimensional schematic diagram of a wave energy power generation device based on a breakwater according to an embodiment of the present invention; Figure 3 is a side structural diagram of a wave energy power generation device based on a breakwater according to an embodiment of the present invention; Figure 4 yes Figure 3 Schematic diagram of the cross section at AA in the middle; Figure 5 is a diagram showing the internal structure of a wave energy power generation device based on a breakwater according to an embodiment of the present invention; Figure 6 yes Figure 5 A partial enlarged view of point B in the middle; Figure 7 1 is a schematic diagram of the assembly of the generator impeller and the generator body according to an embodiment of the present invention; Figure 8 is a three-dimensional schematic diagram of a first flow guide structure according to an embodiment of the present invention; Figure 9 is a three-dimensional schematic diagram of a second flow guide structure according to an embodiment of the present invention; Figure 10 This is a three-dimensional schematic diagram of a drainage structure according to an embodiment of the present invention; In the figure: 1. main shell; 10. accommodating chamber; 11. first water inlet; 12. second water inlet; 13. drain outlet; 14. confluence trough; 15. confluence inlet; 16. retaining wall; 17. water guide slope; 18. first grille; 2. first diversion structure; 21. first water outlet; 3. second diversion structure; 31. second water outlet; 32. vertical section; 33. horizontal section; 34. second grille; 4. generator impeller; 40. generator body; 41. rotating shaft; 42. impeller casing; 5. drain structure; 51. water collection port; 52. drain louver; 6. one-way valve; 61. valve seat; 62. valve core; 63. elastic member; 64. hollow channel; 65. flange; 71. first water level probe; 72. second water level probe; a. first driving force; b. second driving force. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0024] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] like Figures 1 to 10 As shown, an embodiment of the present invention is a wave energy power generation device based on a breakwater, which includes a main shell 1, a first flow guide structure 2, a second flow guide structure 3 and a generator impeller 4. A accommodating cavity 10 is provided in the main shell 1, and the first flow guide structure 2, the second flow guide structure 3 and the generator impeller 4 are all arranged in the accommodating cavity 10; a first water inlet 11 and a drain outlet 13 are provided on one side of the main shell 1, and the first water inlet 11 and the drain outlet 13 are spaced apart in the upper and lower directions. One end of the first flow guide structure 2 is connected to the first water inlet 11, and the other end of the first flow guide structure 2 is provided with a first water outlet 21, and the first water outlet 21 is arranged toward the generator impeller 4.

[0026] A second water inlet 12 is also provided on the upper part of the main shell 1, one end of the second flow-guiding structure 3 is connected to the second water inlet 12, and the other end of the second flow-guiding structure 3 is provided with a second water outlet 31, and the second water outlet 31 is arranged toward the generator impeller 4; the water flow from the first water outlet 21 to the generator impeller 4 has a first driving force a, and the water flow from the second water outlet 31 to the generator impeller 4 has a second driving force b, and the first driving force a and the second driving force b are arranged in the same direction along the circumferential direction of the generator impeller 4.

[0027] The breakwater-based wave energy power generation device adopts a design form of a main shell 1, a first flow guide structure 2, a second flow guide structure 3 and a generator impeller 4. The first flow guide structure 2, the second flow guide structure 3 and the generator impeller 4 are all arranged in an accommodating cavity 10; a first water inlet 11 and a drain outlet 13 are provided at intervals above and below one side of the main shell 1, the first flow guide structure 2 is connected to the first water inlet 11, a second water inlet 12 is provided on the upper part of the main shell 1, the second flow guide structure 3 is connected to the second water inlet 12, and the first water outlet 21 of the first flow guide structure 2 and the second water outlet 31 of the second flow guide structure 3 are both arranged towards the generator impeller 4.

[0028] The first water inlet 11, located on the side, is used to capture the horizontal forward flow that surges in when waves impact the breakwater, while the second water inlet 12, located at the top, is used to capture the high-level water flow that surges in when waves pass over the breakwater. High-level water flow includes crest overflow, wave splashing, and falling water flow. Based on the first and second water inlets 11, 12, combined with the first and second guide structures 2, 3, a dual-channel water inlet path is formed, which can effectively capture wave energy from different directions, preventing some wave energy that passes over the breakwater from being unused, significantly widening the device's response window to waves, and thus fully utilizing energy at different stages and locations in the wave cycle.

[0029] Furthermore, the first water outlet 21 of the first flow-guiding structure 2 and the second water outlet 31 of the second flow-guiding structure 3 are both positioned toward the generator impeller 4, ensuring that the water flow efficiently and accurately impacts the generator impeller 4, maximizing the conversion of the water flow's kinetic energy into mechanical energy for impeller power generation. More crucially, when the water flows out of the first water outlet 21 and the second water outlet 31, acting on the generator impeller 4, they generate a first driving force a and a second driving force b, respectively. These two driving forces are arranged in the same direction along the circumference of the generator impeller 4, meaning that the driving forces generated by the two water flows are positively superimposed, effectively increasing the total torque driving the generator impeller 4 to rotate. This also reduces the duration of impeller power generation interruptions caused by the periodicity of wave motion, thereby improving wave energy utilization and power generation efficiency. The power generation components are integrated into the accommodating chamber 10 of the main housing 1, minimizing damage from the impact of large waves in extreme sea conditions, thereby achieving the dual purpose of both the breakwater's protective function and wave power generation.

[0030] In this embodiment, a confluence trough 14 is provided on the upper portion of the main housing 1. A confluence inlet 15 is provided on the side of the confluence trough 14 near the first water inlet 11. The second water inlet 12 is located on the side of the confluence trough 14 away from the confluence inlet 15. Furthermore, a water retaining wall 16 is provided protruding from the upper portion of the main housing 1. The water retaining wall 16 is arranged outside the confluence trough 14. The main housing 1 is also provided with a water guide slope 17 corresponding to the confluence inlet 15. The water guide slope 17 is arranged lower than the water retaining wall 16. The water guide slope 17 is arranged in a gradually decreasing height from the confluence inlet 15 to the second water inlet 12.

[0031] Specifically, the main hull 1 has a hybrid breakwater design. Its upper portion is a right-angled trapezoidal pyramid, with the slope facing the sea. The first water inlet 11 is located on the slope of the right-angled trapezoidal pyramid, which reduces coastal erosion caused by wave reflection. The main hull 1 is constructed of reinforced concrete, resulting in a longer structural lifespan and lower maintenance costs. The top surface of the main hull 1 is rectangular. Retaining walls 16 are located on three sides away from the first water inlet 11, forming a confluence trough 14. Confluence inlet 15 allows waves impacting directly into the confluence trough 14 and collects water flowing over the breakwater. Confluence inlet 15 is equipped with a gradually decreasing water diversion slope 17 with a slope ranging from 5° to 30°, preferably 20°, to prevent water entering the confluence trough 14 from flowing back out. The inner surface of retaining wall 16 is sloped, ensuring that water flowing over the breakwater flows more easily into the second water inlet 12.

[0032] In other embodiments, the main hull can be constructed of steel instead of reinforced concrete. Steel structures are easy to repair and are lightweight for easy transportation. Furthermore, the main hull's shape is not limited to the hybrid breakwater design of the aforementioned embodiment. It can also be a sloped breakwater or a vertical breakwater design. For example, a sloped breakwater is constructed of stone or concrete blocks stacked into a trapezoidal cross-section. It dissipates energy through the slope and adapts to weak foundations, making it suitable for shallow waters. Vertical breakwaters, on the other hand, utilize concrete gravity walls that reflect waves to form standing waves. They require a gravel basebed to increase the foundation's bearing capacity and are often used in deep waters.

[0033] As a further preferred solution, the rotation axis of the generator impeller 4 is arranged in the vertical direction, and the rotation axis of the generator impeller 4 is located in the middle of the vertical projection of the accommodating cavity 10, and the first water outlet 21 and the second water outlet 31 are centrally symmetrical about the generator impeller 4. Figure 4 As shown, the first water outlet 21 and the second water outlet 31 are diagonally distributed with respect to the center of the generator impeller 4, ensuring the force balance of the generator impeller 4, and the water outlet directions of the first water outlet 21 and the second water outlet 31 are set in parallel and opposite directions, so that the generator impeller 4 always keeps running clockwise. The two water outlets are arranged in partitions without interfering with each other, avoiding the relative impact and energy offset between the water flow of the first water outlet 21 and the water flow of the second water outlet 31, thereby improving the wave energy utilization rate of the two water flows in different directions.

[0034] The second diversion structure 3 is an L-shaped diversion pipe, comprising a fixedly connected vertical section 32 and a horizontal section 33. The vertical section 32 is connected to the second water inlet 12, and the second water outlet 31 is provided at the end of the horizontal section 33. The L-shaped diversion pipe design of the second diversion structure 3 can better utilize the gravitational potential energy generated by the internal drop of the breakwater and can efficiently capture the energy of waves passing over the breakwater.

[0035] Furthermore, the first flow-guiding structure 2 is a trumpet-shaped structure, and the cross-sectional area of the inner channel of the first flow-guiding structure 2 gradually decreases from the first water inlet 11 to the first water outlet 21. The first flow-guiding structure 2 adopts a trumpet-shaped structure design that is wide in the front and narrow in the back, which fully utilizes the internal space of the accommodating chamber 10. It can not only capture the horizontal forward water flow over a large area, but also accelerate the water flow speed through the streamlined tapered structure, thereby increasing the kinetic energy of the water in the first flow-guiding structure 2 and achieving good diversion and gathering effects. In addition, the first flow-guiding structure 2 is equipped with a first grille 18 corresponding to the first water inlet 11, and the second water outlet 31 of the second flow-guiding structure 3 is equipped with a second grille 34. The first grille 18 and the second grille 34 are used to block foreign matter brought by the water flow, thereby ensuring the smooth operation of the generator impeller 4 in the accommodating chamber 10.

[0036] In this embodiment, the breakwater-based wave energy power generation device further includes a generator body 40, a rotating shaft 41, and an impeller housing 42. The generator body 40 is mounted on the upper portion of the accommodating chamber 10, the generator impeller 4 is spaced apart from the lower side of the generator body 40, and the rotating shaft 41 is fixedly connected between the generator impeller 4 and the generator body 40. The impeller housing 42 is mounted on the outer side of the generator impeller 4. The generator body 40 is located at the top of the generator system to prevent normal power generation from being affected by water impact or immersion. It should be noted that the blade angle of the generator impeller 4 is adjusted according to the water flow velocity at the first water outlet 21 so that the water flow impact direction is perpendicular to the blades of the generator impeller 4, ensuring that the water flow acts on the generator impeller 4 to generate maximum power.

[0037] Furthermore, the breakwater-based wave energy power generation device further includes a drainage structure 5, which is disposed within the accommodating chamber 10 and located below the generator impeller 4. One end of the drainage structure 5 is connected to the drain outlet 13, and the other end of the drainage structure 5 is provided with a water collection port 51, which is in communication with the lower space of the generator impeller 4. The water collection port 51 of the drainage structure 5 is in communication with the lower space of the generator impeller 4, and the other end of the drainage structure 5 leads to the drain outlet 13. After water impacts the generator impeller 4, it naturally flows into the water collection port 51 under the action of gravity and is then rapidly discharged from the accommodating chamber 10 through the drainage structure 5. This prevents water from accumulating in the accommodating chamber 10 and forming a dead water zone. This maintains the pressure difference from the first water inlet 11 and the first water outlet 21 to the drain outlet 13, as well as the pressure difference from the second water inlet 12 and the second water outlet 31 to the drain outlet 13. Through efficient drainage, water inflow continuity and flow field stability are ensured.

[0038] As a further preferred embodiment, the drainage structure 5 is a curved drain pipe, constructed from 316 stainless steel sheet bent to form a diversion angle of 35° to 40°. A water collection port 51 is connected to the impeller housing 42. The height of the drainage structure 5 gradually decreases from the water collection port 51 to the drain port 13, accelerating the drainage of water after it impacts the generator impeller 4. Furthermore, a drainage louver 52 is installed at the drain port 13. A one-way valve 6 is also installed near the drain port 13. This one-way valve 6 is arranged to provide one-way conduction from the water collection port 51 to the drain port 13, preventing the discharged water from flowing back into the drainage structure 5 and the accommodating chamber 10.

[0039] Specifically, the one-way valve 6 includes a valve seat 61, multiple valve cores 62, and multiple elastic members 63. The valve seat 61 is fixedly arranged inside the drainage structure 5. The valve seat 61 is provided with a hollow channel 64. Multiple valve cores 62 are arranged in the hollow channel 64 and are arranged in sequence along the length of the drain outlet 13. The elastic member 63 is arranged on the side of the valve core 62 close to the drain outlet 13, and a flange 65 is also provided on the side of the valve seat 61 away from the drain outlet 13. The multiple valve cores 62 are respectively pressed against the flange 65. When the internal water pressure acts on the valve core 62 and is greater than the elastic force of the elastic member 63, the valve core 62 can be pushed open and separated from the flange 65. At this time, the elastic member 63 is compressed, and the internal water flow is smoothly discharged outward. When the internal water pressure disappears or the external water pressure acts on the valve core 62, the valve core 62 presses against the flange 65 and blocks the hollow channel 64 of the valve seat 61, effectively isolating the external water flow from entering in the reverse direction.

[0040] In addition, a first water level probe 71 and a second water level probe 72 are provided in the drainage structure 5. The first water level probe 71 is arranged near the drain outlet 13, and the second water level probe 72 is arranged higher than the first water level probe 71. The first water level probe 71 and the second water level probe 72 are respectively used to detect the water level, so as to issue a blockage alarm signal when the water levels are detected at the same time. The two water level probes at different heights in the drainage structure 5 are used to detect the water level. During the water discharge process, due to the large amount of water discharged in a short period of time, the first water level probe 71 can detect the low water level, while the second water level probe 72 does not detect the high water level, indicating normal drainage operation. If the water level continues to rise, the two water level probes will detect the low water level and the high water level respectively, and then an alarm signal will be issued to indicate that the drainage structure 5 may be blocked, so that it can be shut down for inspection in time.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A wave energy power generation device based on a breakwater, characterized in that: The invention comprises a main shell (1), a first flow-guiding structure (2), a second flow-guiding structure (3) and a generator impeller (4); a receiving chamber (10) is provided in the main shell (1); the first flow-guiding structure (2), the second flow-guiding structure (3) and the generator impeller (4) are all arranged in the receiving chamber (10); a first water inlet (11) and a water outlet (13) are provided at intervals on one side of the main shell (1); one end of the first flow-guiding structure (2) is connected to the first water inlet (11); the other end of the first flow-guiding structure (2) is provided with a first water outlet (21); the first water outlet (21) is arranged toward the generator impeller (4); The upper portion of the main housing (1) is further provided with a second water inlet (12), one end of the second flow-guiding structure (3) is connected to the second water inlet (12), and the other end of the second flow-guiding structure (3) is provided with a second water outlet (31), and the second water outlet (31) is arranged toward the generator impeller (4); The water flow from the first water outlet (21) to the generator impeller (4) has a first driving force (a), and the water flow from the second water outlet (31) to the generator impeller (4) has a second driving force (b), and the first driving force (a) and the second driving force (b) are arranged in the same direction along the circumferential direction of the generator impeller (4).

2. The wave energy power generation device based on a breakwater according to claim 1, characterized in that: A confluence trough (14) is provided on the upper portion of the main shell (1), a confluence inlet (15) is provided on a side of the confluence trough (14) close to the first water inlet (11), and the second water inlet (12) is located on a side of the confluence trough (14) away from the confluence inlet (15).

3. The wave energy power generation device based on breakwater according to claim 2, characterized in that: A water retaining wall (16) is protruding from the upper portion of the main shell (1), and the water retaining wall (16) is arranged outside the confluence trough (14). The main shell (1) is further provided with a water guide slope (17) corresponding to the confluence inlet (15), and the water guide slope (17) is arranged lower than the water retaining wall (16); and the water guide slope (17) is arranged in a gradually decreasing height from the confluence inlet (15) to the second water inlet (12).

4. The wave energy power generation device based on a breakwater according to claim 1, 2 or 3, characterized in that: The rotation axis of the generator impeller (4) is arranged in a vertical direction and is located in the middle of a vertical projection of the accommodating cavity (10). The first water outlet (21) and the second water outlet (31) are centrally symmetrical about the generator impeller (4).

5. The wave energy power generation device based on a breakwater according to claim 1, 2 or 3, characterized in that: The second flow-guiding structure (3) is an L-shaped flow-guiding pipe, comprising a vertical section (32) and a horizontal section (33) that are fixedly connected, the vertical section (32) being connected to the second water inlet (12), and the second water outlet (31) being arranged at the end of the horizontal section (33).

6. The wave energy power generation device based on a breakwater according to claim 1, 2 or 3, characterized in that: The first flow-guiding structure (2) is a trumpet-shaped structure, and the inner channel of the first flow-guiding structure (2) is arranged with a cross-sectional area gradually decreasing from the first water inlet (11) to the first water outlet (21).

7. The wave energy power generation device based on a breakwater according to claim 1, 2 or 3, characterized in that: The breakwater-based wave energy power generation device further comprises a generator body (40), a rotating shaft (41) and an impeller housing (42); the generator body (40) is mounted on the upper portion of the accommodating cavity (10); the generator impeller (4) is spaced apart and arranged on the lower side of the generator body (40); the rotating shaft (41) is fixedly connected between the generator impeller (4) and the generator body (40); and the impeller housing (42) is mounted on the outer side of the generator impeller (4); The breakwater-based wave energy power generation device further comprises a drainage structure (5), wherein the drainage structure (5) is arranged in the accommodating cavity (10) and is located at the lower side of the generator impeller (4), one end of the drainage structure (5) is connected to the drainage port (13), and the other end of the drainage structure (5) is provided with a water collection port (51), and the water collection port (51) is communicated with the lower space of the generator impeller (4).

8. The wave energy power generation device based on breakwater according to claim 7, characterized in that: The drainage structure (5) is a curved drainage pipe, the water collection port (51) is connected to the impeller housing (42), and the height of the drainage structure (5) is gradually reduced in the direction from the water collection port (51) to the drainage port (13); the drainage structure (5) is also installed with a one-way valve (6) near the drainage port (13), and the one-way valve (6) is arranged in a one-way direction along the direction from the water collection port (51) to the drainage port (13).

9. The wave energy power generation device based on a breakwater according to claim 8, characterized in that: The one-way valve (6) comprises a valve seat (61), a plurality of valve cores (62) and a plurality of elastic members (63); the valve seat (61) is fixedly arranged inside the drainage structure (5); the valve seat (61) is provided with a hollow channel (64); the plurality of valve cores (62) are arranged in the hollow channel (64) and are sequentially arranged along the length direction of the drainage port (13); The elastic member (63) is arranged on a side of the valve core (62) close to the drain outlet (13), and a flange (65) is further provided on a side of the valve seat (61) away from the drain outlet (13), and a plurality of the valve cores (62) are respectively press-fitted with the flanges (65).

10. The wave energy power generation device based on a breakwater according to claim 7, characterized in that: The drainage structure (5) is further provided with a first water level probe (71) and a second water level probe (72); the first water level probe (71) is arranged close to the drainage outlet (13), and the second water level probe (72) is arranged higher than the first water level probe (71); the first water level probe (71) and the second water level probe (72) are respectively used to detect water levels, so as to send a blockage alarm signal when the water levels are detected at the same time.

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