Wave energy power generation device

Abstract

The invention relates to the technical field of energy power generation, and discloses a wave energy power generation device which comprises a base, a supporting part, a power generation part and a triggering part, the base can float on the sea surface, the supporting part comprises a stand column fixedly connected to the center of the base and a plurality of supporting columns evenly distributed on the periphery of the stand column, and the stand column is fixedly connected with the base; a slot is horizontally formed in the side wall of the stand column and / or the supporting column, the power generation part comprises a plurality of elastic sheets and piezoelectric sheets fixedly connected to the upper surfaces of the elastic sheets, the elastic sheets are connected between the stand column and the supporting column, and the ends of the elastic sheets arranged in the slot can move in the slot as the middle parts of the elastic sheets protrude or sink downwards to deform. The triggering part comprises a first magnet and a plurality of second magnets, the first magnet is rotationally connected with the stand column, the first magnet rotates around the stand column in the circumferential direction under the action of wave energy, and the second magnets are fixedly connected with the upper surfaces of the elastic pieces in a one-to-one correspondence mode. The power generation effect can be integrally and stably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy generation, and particularly relates to a wave energy power generation device. Background Art

[0002] Wireless sensor network technology is a distributed sensor network. The end of the system consists of countless sensors that can sense and monitor the outside world. The sensors form a network communication system wirelessly. For monitoring parameters such as temperature, humidity, and wind force at sea, a large number of sensor nodes are required. Each sensor node needs to provide a certain amount of electrical energy. Since the long-distance transmission of electrical energy at sea involves a large project and high cost, and the humid environment at sea will greatly reduce the service life of the battery or even cause water ingress and short circuit, the frequent maintenance or replacement of the battery undoubtedly brings a huge workload. Therefore, at present, new energy is often used to achieve self-power generation. The current new energy power generation modes usually include solar panels and wind power generation. Due to the complex sea environment, the power generation of the sun and wind is not stable enough, making it difficult for the stored electricity in the energy storage module to continuously supply the operation of many sensors. Therefore, at present, for power generation at sea, a new energy method using wave energy is more likely to be selected to achieve power generation.

[0003] At present, most wave energy power generation devices include a buoyancy plate that can float on the sea surface and components that can longitudinally displace under the action of wave energy. For example, a slide rail vertically connected to the buoyancy plate and a gear set are connected. A rack with a counterweight can longitudinally displace along the slide rail under the action of waves and mesh with the driving gear of the corresponding gear set, thereby driving the end gear of the gear set to rotate at a high speed, and using the generated axial force to drive the generator set connected thereto to generate electricity. There are also some power generation devices that generate electricity by combining mechanical energy with power generation materials. This device usually replaces the heavy gear set structure with piezoelectric sheets PZT that can generate electricity by relying on deformation, and also includes an elastic counterweight sphere that can longitudinally bump under the action of sea waves and squeeze the piezoelectric sheets to deform.

[0004] However, the actual sea conditions are relatively complex. The sea water will not only cause the height of the buoyancy plate to change, but also make the buoyancy plate itself tilt. Although the existing power generation devices currently utilize the longitudinal displacement generated by continuous wave energy to achieve power generation, in the tilted state of the buoyancy plate, the displacement of the counterweight rack or sphere that provides the core power generation kinetic energy will have its kinetic energy greatly weakened due to the tilt, resulting in poor overall power generation effect. Summary of the Invention

[0005] The present invention provides a wave energy power generation device, which can stably improve the overall power generation effect.

[0006] The present invention provides a wave energy power generation device, comprising: a base, a support part, a power generation part, and a trigger part. The base can float on the sea surface. The support part includes a column fixed to the center of the base and a plurality of support columns evenly distributed on the outer periphery of the column. The column is fixedly connected to the base, and slots are horizontally formed on the side walls of the column and / or the support columns. The power generation part includes a plurality of elastic sheets and piezoelectric sheets fixedly connected to the upper surfaces thereof. The elastic sheets are connected between the column and the support columns, and the end portions of the elastic sheets located on one side of the slots are inserted into the slots. As the middle portions of the elastic sheets bulge or concave, the end portions of the elastic sheets placed in the slots can move along the slots. The trigger part includes a first magnet and a plurality of second magnets. The first magnet is rotatably connected to the column, and the first magnet rotates circumferentially around the column under the action of wave energy. Each second magnet is fixedly connected to the upper surface of each elastic sheet in a one-to-one correspondence.

[0007] Preferably, the number of slots is the same as the number of each support column.

[0008] Preferably, the second magnet is located in the middle of the elastic sheet, and the gravity of the second magnet can bend the elastic sheet.

[0009] Preferably, the number of the first magnets is multiple, the multiple first magnets are at the same height, and are non-uniformly distributed on the circumferential side of the column.

[0010] Preferably, the first magnet is rotatably connected to the column through a rotating structure. The rotating structure includes a shaft body. The shaft body is rotatably connected to the middle of the upper end of the column. The first magnet is connected to the circumferential side of the shaft body through a cross bar. The cross bar is detachably connected to the side wall of the shaft body, and the weight of the first magnet is greater than the weight of the cross bar.

[0011] Preferably, each piezoelectric sheet is electrically connected to an energy storage module for storing electrical energy through a positive electrode wire and a negative electrode wire.

[0012] Preferably, the base includes a connecting plate, a bottom plate, and a floating body fixedly connected in sequence from top to bottom. The bottoms of the column and the plurality of support columns are fixedly connected to the upper surface of the connecting plate. The size of the floating body is larger than that of the connecting plate. The floating body is made of foam material and has a plurality of concave cavities formed at the bottom. Each concave cavity is fixedly connected with a hollow floating ball.

[0013] Preferably, the cross bar is provided with an external thread, and a threaded hole for helically disassembling and assembling the cross bar is horizontally formed at the position corresponding to the cross bar on the circumferential side of the shaft body.

[0014] Preferably, the material of the piezoelectric sheet is polyvinylidene fluoride.

[0015] Preferably, a cover body is hermetically connected to the bottom plate.

[0016] Preferably, the cover body is made of a transparent material, and a solar power generation panel for power generation is connected to the top inside the cover body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This power generation device can adapt to wave energy to achieve stable power generation. When the base tilts to the left or right due to the transfer of wave kinetic energy, although the power generation performance of traditional longitudinal displacement weakens, it is precisely by using the tilt of the base that the first magnet, which is the driving body inside, will start to deflect around the circumference of the column under its own gravity. After the first magnet approaches the corresponding second magnet, the second magnet that senses the first magnet will gradually increase the non-linear magnetic attraction force on the first magnet until the distance between the first magnet and the second magnet reaches the minimum length. Under the action of the non-linear magnetic force, the second magnet will break through the elastic potential energy barrier of the elastic sheet and thus approach the first magnet. At this time, the elastic sheet will gradually deform and bulge upward from the downward-bent state to achieve inter-well movement. During this process, the deformation of the elastic sheet can cause the piezoelectric sheet fixed on the elastic sheet to deform and bend synchronously. The greater the deformation of the elastic sheet, the greater the deformation of the piezoelectric sheet fixed on the elastic sheet. According to the direct piezoelectric effect, the energy released during this process will be very substantial, with wave energy as the kinetic energy.

[0018] Specifically, as the base rises and falls and tilts left and right with the kinetic energy of the waves, when the rising and falling action occurs, the second magnet with gravity will also release gravitational potential energy, thereby driving the elastic sheet to undergo elastic deformation, and thus generating electrical energy by using the deformation of the piezoelectric sheet.

[0019] In summary, this power generation device can still utilize wave energy when the base is tilted. It precisely uses the tilt effect of the base and relies on cooperating structures such as elastic sheets for efficient power generation. Facing the complex marine environment, the overall structure is relatively stable, with high energy conversion efficiency, good practicability, and it can make up for the defects of poor power generation effect of existing power generation devices in some states. This device can perfectly adapt to complex wave conditions. At the same time, this device also has the effects of simple structure, easy to manufacture, easy to obtain materials, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial structural schematic diagram of a wave energy power generation device provided by an embodiment of the present invention;

[0021] Figure 2 It is a partial cross-sectional structural schematic diagram of a wave energy power generation device provided by an embodiment of the present invention from a side view angle;

[0022] Figure 3 It is a partial structural schematic diagram of a wave energy power generation device provided by an embodiment of the present invention from a top view angle.

[0023] Description of the reference numerals:

[0024] 1. Base; 11. Connecting plate; 12. Bottom plate; 13. Floating body; 131. Concave cavity; 14. Floating ball; 21. Supporting part; 211. Column; 2111. Slot; 212. Supporting column; 22. Power generation part; 221. Elastic sheet; 222. Piezoelectric sheet; 23. Trigger part; 231. First magnet; 232. Second magnet; 3. Shaft body; 4. Cross bar; 5. Energy storage module; 6. Cover body; 7. Solar panel. Specific embodiments

[0025] The following combines the accompanying drawings to describe in detail a specific embodiment of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the technical solution of 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 a limitation to the present invention.

[0027] Reference Figure 1 、 Figure 2 and Figure 3 The present invention provides a wave energy power generation device, including: a base 1, a support part 21, a power generation part 22, and a trigger part 23. The base 1 can float on the sea surface. The support part 21 includes a column 211 fixedly connected to the center of the base 1 and a plurality of support columns 212 evenly distributed on the outer periphery of the column 211. The column 211 is fixedly connected to the base 1. A slot 2111 is horizontally opened on the side wall of the column 211 and / or the support column 212. The power generation part 22 includes a plurality of elastic sheets 221 and a piezoelectric sheet 222 fixedly connected to the upper surface thereof. The elastic sheet 221 is connected between the column 211 and the support column 212. One end of the elastic sheet 221 located on one side of the slot 2111 is inserted into the slot 2111. As the middle part of the elastic sheet 221 bulges or sinks, the end of the elastic sheet placed in the slot 2111 can move along the slot 2111. The trigger part 23 includes a first magnet 231 and a plurality of second magnets 232. The first magnet 231 is rotatably connected to the column 211. The first magnet 231 rotates circumferentially around the column 211 under the action of wave energy. Each second magnet 232 is fixedly connected to the upper surface of each elastic sheet 221. The rotation of the first magnet 231 can magnetically attract the adjacent second magnet 232 to drive the middle part of the corresponding elastic sheet 221 to deform and bulge upward.

[0028] Specifically, in this embodiment, the number of the preferred slots 2111 is the same as the number of the support columns 212. Preferably, the number of the support columns 212 is four, and the column 211 is a quadrangular prism. The four faces of the column 211 also face the four support columns 212. The inner groove width of the slot 2111 is greater than the thickness of the elastic piece 221. When the elastic piece 221 deforms, the slot 2111 can support a small arched deformation and horizontal displacement at its end.

[0029] The first embodiment: Each slot 2111 is provided in the circumferential direction of the column 211, and the slot openings of the slots 2111 correspond to the support columns 212 one by one. One end of the elastic piece 221 is fixedly connected to the corresponding support column 212, and the other end is movably connected in the slot 2111. To ensure that the adjacent two elastic pieces among the slots 2111 on the four sides of the column 211 do not interfere with each other during movement, preferably, the heights of the adjacent two slots 2111 are different.

[0030] The second embodiment: Each slot 2111 is provided on one side of each support column 212 opposite to the side wall of the column 211, and the slot openings of the slots 2111 correspond to the four faces of the column 211 one by one. One end of the elastic piece 221 is fixedly connected to the column 211, and the other end is movably connected in the slot 2111 of the corresponding support column 212.

[0031] The third embodiment: Slots 2111 are provided on the faces of each support column 212 opposite to the column 211. The two ends of the elastic piece 221 respectively extend into the slots 2111 of the corresponding support column 212 and the slots 2111 of the column. To ensure that the elastic piece 221 does not fall off during deformation, the depth dimension of the slot 2111 can be designed to be slightly deeper, so that the elastic piece 221 does not have too much left - right offset as much as possible, ensuring that the maximum horizontal offset of the middle part of the elastic piece 221 is 1 cm to 2 cm, which is specifically determined flexibly according to the actual situation and is not limited too much in this embodiment.

[0032] In the above embodiments, the power generation device can adapt to wave energy to achieve stable power generation. When the base 1 tilts to the left or right due to the kinetic energy transfer of the wave, although the power generation performance of the traditional longitudinal displacement weakens, it is precisely by using the tilt of the base 1 that the first magnet 231, which is the driving body inside, will start to deflect around the circumference of the column 211 under its own gravity. After the first magnet 231 approaches the corresponding second magnet 232, the second magnet 232 that senses the first magnet 231 will gradually increase the non-linear magnetic attraction force on the first magnet 231 until the distance between the first magnet 231 and the second magnet 232 reaches the minimum length. Under the action of the non-linear magnetic force, the second magnet 232 will break through the barrier of the elastic potential energy of the elastic sheet 221 and thus approach the first magnet 231. At this time, the elastic sheet 221 will gradually deform and bulge upward from the downward-bent state to achieve inter-well movement. During this process, the deformation of the elastic sheet 221 can cause the piezoelectric sheet 222 fixed on the elastic sheet 221 to deform and bend synchronously. The greater the deformation of the elastic sheet 221, the greater the deformation of the piezoelectric sheet 222 fixed on the elastic sheet 221. According to the direct piezoelectric effect, the energy released in this process will be very considerable. Using wave energy as kinetic energy, in summary, the power generation device can still utilize wave energy when the base 1 is tilted. It precisely uses the tilt effect of the base 1 to rely on the elastic sheet 221 and other matching structures for efficient power generation. Facing the complex marine environment, the overall structure is relatively stable, the energy conversion efficiency is high, and it has good practicality. It can make up for the defects of the existing power generation devices with poor power generation effects in some states. This device can perfectly adapt to complex wave conditions. At the same time, this device also has the effects of simple structure, easy to manufacture, easy to obtain materials, and low cost.

[0033] Specifically, the base 1 will perform actions such as rising and falling and tilting to the left and right with the kinetic energy of the wave. When the rising and falling action occurs, the second magnet 232 acting as a counterweight will release gravitational potential energy, thereby driving the elastic sheet 221 to undergo elastic deformation, and thus generating electrical energy by using the deformation of the piezoelectric sheet 222.

[0034] Specifically, since the contact between the second magnet 232 and the elastic sheet 221 is mostly line contact, the fixing method can be to snap or weld the housing on the side of the second magnet 232 close to the elastic sheet 221, and then linearly weld the part of the housing in line contact with the elastic sheet 221. Even by opening holes in the elastic sheet 221, the housing is fixed by rivets. Since there are many fixing methods, no specific limitation is made in this embodiment. At the same time, epoxy resin is used for reinforcement to ensure that the magnet does not fall off during the operation of the device. The material of the elastic sheet 221 is 301 stainless steel, and appropriate thickness and width can be selected according to the actual marine environment. In the offshore wave environment, the thickness can be 0.1 mm. The bottom of the piezoelectric sheet 222 can be tightly fixed to the elastic sheet 221 by means of high-strength adhesive, etc.

[0035] Further, referring to Figure 2 and Figure 3 , specifically, after fixing the piezoelectric sheet 222, epoxy resin is evenly applied around it. The second magnet 232 is located in the middle of the elastic sheet 221, and the gravity of the second magnet 232 can bend the elastic sheet 221.

[0036] In the above embodiments, by limiting the second magnet 232 to be located in the middle of the elastic sheet 221, it is more conducive to the deformation of the elastic sheet 221, thereby providing a stable tensile and compressive deformation for the piezoelectric sheet 222. The gravity of the limited second magnet 232 can bend the elastic sheet 221, which can play a counterweight effect. When the overall structure is driven by wave energy to move longitudinally, when the first magnet 231 is not adsorbed, the second magnet 232 will also drive the elastic sheet 221 to release elastic potential energy by relying on its gravitational potential energy, thus truly realizing the efficient utilization of wave energy.

[0037] Further, referring to Figure 2 and Figure 3 , the first magnet 231 is spherical and the number is multiple. The multiple first magnets 231 are located at the same height and are non-uniformly distributed on the periphery of the column 211.

[0038] In the above embodiments, by setting the number of the first magnets 231 to be multiple, the frequency of driving the deformation of each second magnet 232 can be realized, thereby improving the efficiency of power generation and energy storage. At the same time, considering that the uniform distribution of each first magnet 231 may be difficult to deflect when the base 1 is in an inclined state, therefore, this device limits the multiple first magnets 231 to be non-uniformly distributed at the same height on the periphery of the column 211, so that after the base 1 is inclined, the multiple first magnets 231 will always have a focus, so as to achieve the rotation effect.

[0039] Further, referring to Figure 2 and Figure 3, the first magnet 231 is rotatably connected to the vertical column 211 through a rotating structure. The rotating structure includes a shaft body 3. The shaft body 3 is rotatably connected to the middle of the upper end of the vertical column 211 through a rotating shaft. The first magnet 231 is connected to the circumferential side of the shaft body 3 through a cross bar 4. The cross bar 4 is detachably connected to the side wall of the shaft body 3. The weight of the first magnet 231 is greater than the weight of the cross bar 4.

[0040] In the above embodiments, the shaft body 3 can rotate along the center line of the vertical column 211 with the rotating shaft, so that the second magnet 232 and the rod body rotate circumferentially around the axis of the shaft body 3. As Figure 2 shown, when each second magnet 232 approaches the first magnet 231, their longitudinal positions are opposite. By defining that the weight of the first magnet 231 is greater than the weight of the cross bar 4, a counterweight effect can be achieved. When the base 1 is tilted, it is beneficial to the deflection of the first magnet 231.

[0041] Furthermore, referring to Figure 2 , each piezoelectric sheet 222 is electrically connected with an energy storage module 5 for storing electrical energy through a positive electrode wire and a negative electrode wire.

[0042] In the above embodiments, the provided energy storage module 5 is a conventional energy storage power supply, which can store the electrical energy generated by the piezoelectric sheet 222.

[0043] Furthermore, referring to Figure 1 and Figure 2 , the base 1 includes a connecting plate 11, a bottom plate 12, and a floating body 13 fixedly connected in sequence from top to bottom. The bottoms of the vertical column 211 and the plurality of support columns 212 are fixedly connected to the upper surface of the connecting plate 11. The size of the floating body 13 is larger than that of the connecting plate 11. The floating body 13 is made of foam material and has a plurality of concave cavities 131 opened at its bottom. Each concave cavity 131 is fixedly connected with a hollow floating ball 14.

[0044] In the above embodiments, the connecting plate 11 can be a circular plate or other shapes. In this embodiment, in order to stably support each support column 212, it is preferably a rectangular plate surface, and each support column 212 corresponds to and is close to each corner of the connecting plate 11. In order to minimize the overall weight, as Figure 1 shown, chamfers can be opened at each corner of the connecting plate 11. The hollow floating ball 14 is fixed to the floating body 13 with strong glue. A small part of the floating ball 14 will contact the water surface, thereby providing more stable buoyancy for the floating body 13. By defining that the size of the floating body 13 is larger than that of the connecting plate 11, the effect of further stably supporting the entire power generation component can be increased, and the situation of the device tipping over can be avoided when the floating body 13 is in an inclined state.

[0045] Furthermore, referring to Figure 1 and Figure 2The cross bar 4 is provided with an external thread, and a screw hole is provided horizontally on the side of the shaft body 3 corresponding to the position of the cross bar 4 so as to enable the cross bar 4 to be spirally disassembled.

[0046] In the above embodiments, the cross bar 4 can be spirally fixed to the screw hole of the shaft body 3 by rotating it. When disassembling, the cross bar 4 can be rotated in the opposite direction. This method facilitates the disassembly and assembly of the cross bar 4.

[0047] Further, refer to Figure 1 The material of the piezoelectric sheet 222 is polyvinylidene fluoride PVDF.

[0048] In the above embodiments, the voltage plate in the present structure is made of PVDF, which is softer than the traditional PZT material, has very little fatigue damage after long-term use, and has better corrosion resistance and stability.

[0049] Further, refer to Figure 2 The cover body 6 is sealed and connected to the bottom plate 12 .

[0050] In the above embodiments, by connecting the cover body 6 to the upper part of the bottom plate 12, the internal components can be waterproof and dustproof. Specifically, the top of the cover body 6 is flat. In order to ensure that the bottom plate 12 is evenly stressed when floating and shaking, the side portion is preferably in an arc-shaped structure. The bottom of the cover body 6 is provided with an inner clamping ring flange.

[0051] Further, refer to Figure 2 The cover body 6 is made of transparent material, and a solar panel 7 for generating electricity is connected to the top of the cover body 6 .

[0052] In the above embodiments, the solar panel 7 is provided to assist in power generation during the daylight hours. Considering the use environment on the sea, the solar panel 7 is connected to the top of the cover 6, and the cover 6 is made of lightweight transparent materials such as acrylic, which has a certain degree of light transmittance. The solar panel 7 is a commonly used photovoltaic panel structure and power storage method. Its specific structure is not the core technology of this structure, so this embodiment does not elaborate on the existing structure.

[0053] Usage method and working principle: When the base 1 rises and falls and tilts left and right with the kinetic energy of the waves, when the rising and falling motion occurs, the second magnet 232 acting as a counterweight will release gravitational potential energy, thereby driving the elastic sheet 221 to undergo elastic deformation, and thus generating electrical energy by the deformation of the piezoelectric sheet 222. When the kinetic energy of the waves is transmitted to the base 1 and causes it to tilt left or right, although the kinetic energy given by the second magnet 232 to the elastic sheet 221 weakens, it is precisely by using the tilt of the base 1 that the first magnet 231 acting as a driving body inside it will start to deflect around the circumferential side of the column 211 under its own gravity. After the first magnet 231 approaches the corresponding second magnet 232, the second magnet 232 that senses the first magnet 231 will gradually increase the non-linear magnetic attraction force on the first magnet 231 until the distance between the first magnet 231 and the second magnet 232 reaches the minimum length. Under the action of the non-linear magnetic force, the second magnet 232 will break through the barrier of the elastic potential energy of the elastic sheet 221 and thus approach the first magnet 231. At this time, the elastic sheet 221 will gradually deform and bulge upward from the downward-bent state to achieve inter-well movement. In this process, the deformation of the elastic sheet 221 can cause the piezoelectric sheet 222 fixed on the elastic sheet 221 to deform and bend synchronously. The greater the deformation of the elastic sheet 221, the greater the deformation of the piezoelectric sheet 222 fixed on the elastic sheet 221, and the deformation of the voltage sheet generates a stable amount of electricity.

[0054] The above discloses only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A wave energy power generation device, characterized in that, Comprising: A base (1) capable of floating on the sea surface; A support part (21), including a column (211) fixedly connected to the center of the base (1) and a plurality of support columns (212) evenly distributed on the outer periphery of the column (211). The column (211) is fixedly connected to the base (1), and slots (2111) are horizontally formed on the side walls of the column (211) and / or the support columns (212); A power generation part (22), including a plurality of elastic sheets (221) and piezoelectric sheets (222) fixedly connected to their upper surfaces. The elastic sheets (221) are connected between the column (211) and the support columns (212). The end of the elastic sheet (221) on one side of the slot (2111) is inserted into the slot (2111). As the middle part of the elastic sheet (221) bulges or sinks, the end of the elastic sheet (221) placed in the slot (2111) can move along the slot (2111); A triggering part (23), including a first magnet (231) and a plurality of second magnets (232). The first magnet (231) is rotatably connected to the column (211). The first magnet (231) rotates circumferentially around the column (211) under the action of wave energy, and each of the second magnets (232) is fixedly connected to the upper surface of each elastic sheet (221) in a one-to-one correspondence; 2. The wave energy power generation device according to claim 1, wherein The number of the slots (2111) is the same as the number of the support columns (212); 3. The wave energy power generation device according to claim 1, wherein The second magnet (232) is located in the middle of the elastic sheet (221), and the gravity of the second magnet (232) can bend the elastic sheet (221); 4. A wave energy power generation device according to claim 1, characterized in that, The first magnet (231) is spherical and there are a plurality of them. The plurality of first magnets (231) are at the same height and are unevenly distributed on the circumferential side of the column (211); 5. The wave energy power generation device according to claim 1, characterized in that, The first magnet (231) is rotatably connected to the column (211) through a rotating structure. The rotating structure includes: A shaft body (3) rotatably connected to the middle of the upper end of the column (211); The first magnet (231) is connected to the circumferential side of the shaft body (3) through a cross bar (4). The cross bar (4) is detachably connected to the side wall of the shaft body (3), and the weight of the first magnet (231) is greater than the weight of the cross bar (4); 6. A wave energy power generation device according to claim 1, characterized in that, Each of the piezoelectric sheets (222) is electrically connected to an energy storage module (5) for storing electrical energy through a positive electrode wire and a negative electrode wire; 7. A wave energy power generation device according to claim 1, characterized in that, The base (1) includes a connecting plate (11), a bottom plate (12) and a floating body (13) fixedly connected in sequence from top to bottom. The bottoms of the column (211) and the plurality of support columns (212) are fixedly connected to the upper surface of the connecting plate (11). The size of the floating body (13) is larger than the size of the connecting plate (11). The floating body (13) is made of foam material and a plurality of cavities (131) are formed at its bottom. A hollow floating ball (14) is fixedly connected in each of the cavities (131); 8. A wave energy power generation device according to claim 5, characterized in that, The cross bar (4) is provided with an external thread, and a screw hole for spiral disassembly and assembly of the cross bar (4) is horizontally formed on the circumferential side of the shaft body (3) corresponding to the cross bar (4).

9. The wave energy power generation device according to claim 1, characterized in that, A cover body (6) is hermetically connected to the bottom plate (12).

10. A wave energy power generation device according to claim 9, characterized in that, The cover body (6) is made of a transparent material, and a solar panel (7) for generating electricity is connected to the top inside the cover body (6).

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