Offshore power plant using photovoltaic and wave energy

Abstract

The invention discloses an offshore power generation device using photovoltaic and wave energy, and the device comprises a floating box which is rotatably connected with a first box body and a second box body; a photovoltaic power generation device; according to the wave energy power generation device, one end of a piston rod is telescopically arranged in a cylinder body, the other end of the piston rod is rotatably connected with one of a first box body and a second box body, the cylinder body is rotatably connected with the other one of the first box body and the second box body, and a power generation assembly is communicated with an oil inlet and an oil outlet of the cylinder body. Therefore, on one hand, photovoltaic power generation and wave energy power generation are integrated through the offshore power generation equipment, efficient utilization of various clean energy can be achieved, on the other hand, waves on the sea surface can push the first box body to rotate relative to the second box body, so that the piston rod can be driven to stretch out and draw back relative to the cylinder body, and then power generation is achieved; therefore, the offshore power generation equipment utilizing photovoltaic and wave energy is simple in structure, convenient to maintain and high in power generation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation equipment, and particularly to an offshore power generation equipment that utilizes photovoltaic and wave energy. Background Art

[0002] The vast ocean contains abundant clean and renewable energy, and its development and utilization play an important role in promoting the global energy transformation. Compared with traditional land energy development, the utilization of ocean energy can effectively avoid problems such as land occupation and noise caused by the installation of facilities, and at the same time can reduce the interference with the ecological environment. Therefore, the efficient development of ocean energy has become a strategic focus for the development of major coastal countries. Currently, there are various forms of ocean energy development, and the main ones with large-capacity development potential include offshore photovoltaic, wave energy, and ocean current energy development. While making full use of the natural conditions of the ocean, these technologies have promoted the innovative development of clean energy technologies and provided strong impetus for achieving global sustainable development goals.

[0003] A Chinese patent (Publication No.: CN216034930U; Publication Date: March 15, 2022) discloses an offshore monitoring and communication buoy that utilizes solar energy and wave energy for power generation. The offshore monitoring and communication buoy includes a floating body platform, and a housing is further provided on the floating body platform. A wave energy piezoelectric power generation device is movably arranged in the housing, and a solar power generation device is also provided on the top integrated platform.

[0004] The wave energy piezoelectric power generation device includes a mass block, a first magnet, a second magnet, and a ceramic piezoelectric sheet. A cross universal joint is fixedly connected to the bottom surface of the floating body platform. The cross universal joint is vertically arranged and its bottom end is rotatably connected to a connecting rod. The mass block is also vertically arranged and springs are symmetrically fixedly connected to both ends thereof. The spring fixedly connected to the top end of the mass block is also fixedly connected to the connecting rod. There are several ceramic piezoelectric sheets arranged around the mass block. There are also several first magnets fixedly connected to the outer side surface of the mass block. There are also several second magnets fixedly connected to the ceramic piezoelectric sheets. The first magnets and the second magnets are movably matched. The ceramic piezoelectric sheet is also fixedly connected to the spring fixedly connected to the bottom end of the mass block through a bearing bracket. The sea wave drives the mass block to compress and stretch the spring. The first magnet on the mass block will generate magnetic poles repelling or attracting with the second magnet on the ceramic piezoelectric sheet. The ceramic piezoelectric sheet continuously generates elastic deformation, and generates electric energy through the piezoelectric effect.

[0005] The wave energy piezoelectric power generation device disclosed in the above patent literature has a complex structure, is inconvenient for disassembly, installation and maintenance, and has a high use cost; and the wave energy piezoelectric power generation device only generates electric energy through the continuous elastic deformation of the ceramic piezoelectric sheet through the piezoelectric effect. The efficiency of converting wave energy into electric energy by this wave energy piezoelectric power generation device is too low to meet the requirements. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an offshore power generation device using photovoltaic and wave energy. The offshore power generation device using photovoltaic and wave energy can not only make full use of various energy sources at sea, but also has a simple structure, high energy utilization efficiency, and is stable and reliable on the sea surface.

[0007] The offshore power generation device using photovoltaic and wave energy according to an embodiment of the present invention includes: a floating box, the floating box includes a first box body and a second box body, the first box body and the second box body are rotatably connected, and the floating box is adapted to float on the sea surface; a photovoltaic power generation device, the photovoltaic power generation device is arranged on the floating box; a wave energy power generation device, the wave energy power generation device is arranged on the floating box and is spaced from the photovoltaic power generation device, the wave energy power generation device includes a hydraulic component and a power generation component, the hydraulic component includes a cylinder body and a piston rod, one end of the piston rod is telescopically arranged in the cylinder body, the other end of the piston rod is rotatably connected to one of the first box body and the second box body, and the cylinder body is rotatably connected to the other of the first box body and the second box body; the power generation component includes a generator, an oil outlet tank and an oil receiving tank, the oil outlet tank is communicated with the oil inlet of the cylinder body, the oil receiving tank is communicated with the oil outlet of the cylinder body, and the generator is connected between the oil outlet tank and the oil receiving tank.

[0008] Thus, on the one hand, by integrating photovoltaic power generation and wave energy power generation in the offshore power generation device, the efficient utilization of multiple clean energy sources can be realized. On the other hand, since the waves on the sea surface can drive the first box body to rotate relative to the second box body, the piston rod can be driven to stretch and contract relative to the cylinder body, and then power generation can be realized. In this way, the structure of the offshore power generation device using photovoltaic and wave energy is simple, convenient for maintenance, has high power generation efficiency, and is stable and reliable on the sea surface. In addition, since the photovoltaic power generation device and the wave energy power generation device are spaced on the floating box, the structure is compact, which is beneficial to the miniaturization of the offshore power generation device using photovoltaic and wave energy.

[0009] In some examples of the present invention, the first box body and the second box body are oppositely arranged in a first direction, the hydraulic component extends in the first direction, there are a plurality of the hydraulic components, and the plurality of hydraulic components are spaced in a second direction, and the first direction and the second direction are perpendicular to each other.

[0010] In some examples of the present invention, in the direction gradually extending from the middle of the floating box to both sides in the second direction, the damping forces of the plurality of hydraulic components decrease in sequence.

[0011] In some examples of the present invention, in the direction gradually extending from the middle of the floating box to both sides along the second direction, the heights of the plurality of hydraulic components in the third direction increase in sequence, and the lengths of the plurality of hydraulic components in the first direction increase in sequence.

[0012] In some examples of the present invention, the hydraulic component includes a first sub-hydraulic component, a second sub-hydraulic component, and a third sub-hydraulic component. The first sub-hydraulic component, the second sub-hydraulic component, and the third sub-hydraulic component all include the cylinder block and the piston rod. The first sub-hydraulic component is arranged in the middle of the floating box in the second direction. The second sub-hydraulic components are two and are respectively arranged on both sides of the first sub-hydraulic component in the second direction at intervals. The third sub-hydraulic components are two, and the two third sub-hydraulic components are respectively arranged on one side of the two second sub-hydraulic components in the second direction at intervals.

[0013] In some examples of the present invention, the cylinder block of one of the two second sub-hydraulic components is connected to the first box body, and the cylinder block of the other of the two second sub-hydraulic components is connected to the second box body; the cylinder block of one of the two third sub-hydraulic components is connected to the first box body, and the cylinder block of the other of the two second sub-hydraulic components is connected to the second box body; the cylinder block of one of the adjacent second sub-hydraulic component and the third sub-hydraulic component is connected to the first box body, and the cylinder block of the other is connected to the second box body.

[0014] In some examples of the present invention, the power generation component includes a first sub-power generation component and a second sub-power generation component. The first sub-power generation component and the second sub-power generation component both include the generator, the oil outlet tank, and the oil collection tank. The first sub-power generation component is arranged in the first box body, and the cylinder block rotatably connected to the first box body is correspondingly communicated with the first sub-power generation component, and the cylinder block rotatably connected to the second box body is correspondingly communicated with the second sub-power generation component.

[0015] In some examples of the present invention, the floating box includes a photovoltaic floating box and a wave energy power generation floating box. The photovoltaic power generation device is arranged on the photovoltaic floating box, and the wave energy power generation device is arranged on the wave energy power generation floating box. The photovoltaic floating box is circumferentially arranged around the outside of the wave energy power generation floating box and is connected to the wave energy power generation floating box.

[0016] In some examples of the present invention, the photovoltaic power generation device includes photovoltaic elements and support members. The photovoltaic elements are arranged on the photovoltaic floating box through the support members. The photovoltaic elements are multiple, and the multiple photovoltaic elements are arranged at intervals on the photovoltaic floating box.

[0017] In some examples of the present invention, the offshore power generation device utilizing photovoltaic and wave energy further includes a cable. One end of the cable is connected to the circumferential edge of the floating box, and the other end is provided with an anchor pile adapted to be fixedly connected to the seabed. There are multiple cables, and the multiple cables are arranged at intervals on the circumferential edge of the floating box.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of an offshore power generation device utilizing photovoltaic and wave energy according to an embodiment of the present invention; Figure 2 is a schematic diagram of an offshore power generation device utilizing photovoltaic and wave energy according to an embodiment of the present invention; Figure 3 is a partial schematic diagram of an offshore power generation device utilizing photovoltaic and wave energy according to an embodiment of the present invention; Figure 4 is a partial schematic diagram of an offshore power generation device utilizing photovoltaic and wave energy according to an embodiment of the present invention; Figure 5 is a schematic diagram of a wave energy power generation device and a wave energy floating box according to an embodiment of the present invention; Figure 6 is a schematic diagram of a wave energy power generation device and a wave energy floating box according to an embodiment of the present invention; Figure 7 is a partial schematic diagram of a wave energy power generation device and a wave energy floating box according to an embodiment of the present invention.

[0020] Reference Numerals: 100, Offshore power generation device utilizing photovoltaic and wave energy; 10, Floating box; 11, First box body; 111, First base; 12, Second box body; 121, Second base; 13, Photovoltaic floating box; 131, First photovoltaic sub-floating box; 132, Second photovoltaic sub-floating box; 14, Wave energy power generation floating box; 141, First wave sub-floating box; 142, Second wave sub-floating box; 15, Lifting lug; 16, Main shaft; 20, Photovoltaic power generation device; 21, Bracket member; 22, Photovoltaic member; 30. Wave energy power generation device; 31. Hydraulic component; 311. Cylinder block; 3111. Oil outlet; 3112. Oil inlet; 3113. Oil outlet check valve; 3114. Oil inlet check valve; 312. Piston rod; 313. First sub-hydraulic component; 314. Second sub-hydraulic component; 315. Third sub-hydraulic component; 32. Power generation component; 321. Generator; 322. Oil outlet fuel tank; 323. Oil collection fuel tank; 324. First sub-power generation component; 325. Second sub-power generation component; 40. Cable; 401. Connection part; 41. Anchor pile. Detailed implementation manners

[0021] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0022] Reference will be made below Figures 1 - 7 to describe the offshore power generation device 100 using photovoltaic and wave energy according to an embodiment of the present invention.

[0023] Combined with Figures 1 - 7 as shown, the offshore power generation device 100 using photovoltaic and wave energy according to the present invention may mainly include: a floating box 10, a photovoltaic power generation device 20, and a wave energy power generation device 30. Among them, the floating box 10 includes a first box body 11 and a second box body 12. The first box body 11 and the second box body 12 are rotatably connected. The floating box 10 is adapted to float on the sea surface. The photovoltaic power generation device 20 is arranged on the floating box 10. The wave energy power generation device 30 is arranged on the floating box 10 and is spaced from the photovoltaic power generation device 20. The wave energy power generation device 30 includes a hydraulic component 31 and a power generation component 32. The hydraulic component 31 includes a cylinder block 311 and a piston rod 312. One end of the piston rod 312 is telescopically arranged in the cylinder block 311. The other end of the piston rod 312 is rotatably connected to one of the first box body 11 and the second box body 12. The cylinder block 311 is rotatably connected to the other of the first box body 11 and the second box body 12. The power generation component 32 is respectively communicated with the oil inlet 3112 and the oil outlet 3111 of the cylinder block 311.

[0024] Specifically, by rotatably connecting the first box body 11 and the second box body 12, after the offshore power generation device 100 utilizing photovoltaic and wave energy is arranged on the sea surface, the floating box 10 floats on the sea surface. The reciprocating motion of the waves on the sea surface can drive the rotation of the first box body 11 relative to the second box body 12. Since the wave energy power generation device 30 includes a hydraulic component 31 and a power generation component 32, the hydraulic component 31 includes a cylinder block 311 and a piston rod 312. One end of the piston rod 312 is telescopically arranged in the cylinder block 311, and the other end of the piston rod 312 is rotatably connected to one of the first box body 11 and the second box body 12, and the cylinder block 311 is rotatably connected to the other of the first box body 11 and the second box body 12. Therefore, the rotation of the first box body 11 relative to the second box body 12 can drive the movement of the piston rod 312 relative to the cylinder block 311. When the piston rod 312 compresses into the cylinder block 311, the pressure in the cylinder block 311 increases, and the differential pressure force forces the hydraulic oil in the cylinder block 311 to enter the power generation component 32 through the oil outlet 3111. By the same principle, when the piston rod 312 stretches out relative to the cylinder block 311, a negative pressure is formed in the cylinder block 311, and the differential pressure force forces the hydraulic oil in the power generation component 32 to enter the cylinder block 311. During this process, the kinetic energy of the hydraulic oil will be converted into electrical energy by the power generation component 32. With such an arrangement, the reciprocating kinetic energy of the waves that causes the first box body 11 to rotate relative to the second box body 12 when the waves impact the floating box 10 can be converted into the kinetic energy of the piston rod 312 in the horizontal direction. That is, the offshore power generation device 100 utilizing photovoltaic and wave energy collects the wave energy captured by the floating box 10 and transmits it to the wave energy power generation device 30 above it to achieve wave energy power generation.

[0025] Combined with Figure 5 and Figure 6As shown, the power generation assembly 32 includes a generator 321, an oil outlet tank 322 and an oil receiving tank 323. The oil outlet tank 322 is connected to the oil inlet 3112, and the oil receiving tank 323 is connected to the oil outlet 3111. The generator 321 is connected between the oil outlet tank 322 and the oil receiving tank 323. Specifically, by connecting the oil outlet tank 322 and the oil inlet 3112 of the cylinder body 311, and connecting the oil receiving tank 323 and the oil outlet 3111 of the cylinder body 311, when the piston rod 312 compresses the cylinder body 311 inwardly, the hydraulic oil in the cylinder body 311 enters the oil receiving tank 323 through the oil outlet 3111. When the piston rod 312 stretches outwardly relative to the cylinder body 311, the hydraulic oil in the oil outlet tank 322 enters the cylinder body 311 through the oil inlet 3112. In this way, the oil outlet tank 322 and the receiving tank 323 are connected. A pressure difference will be formed between the oil tanks 323, so that the hydraulic oil in the oil receiving tank 323 enters the oil outlet tank 322. The generator 321 is set between the oil receiving tank 323 and the oil outlet tank 322. The high-speed flowing hydraulic oil passes through the generator 321, and the generator 321 converts kinetic energy into electrical energy until the pressure of the oil outlet tank 322 and the oil receiving tank 323 is balanced. This not only makes the efficiency of converting kinetic energy into electrical energy high, but also the power generation component 32 has a simple structure and is easy to manufacture and use.

[0026] In a specific embodiment of the present invention, an impeller is provided in the generator 321, and the hydraulic oil entering the oil outlet tank 322 from the oil receiving tank 323 drives the impeller to rotate. The rotation of the impeller drives the rotor of the generator 321 to rotate through a transmission mechanism such as a shaft and a gear box. The rotation of the rotor causes a change in its internal magnetic field. Due to the electromagnetic induction phenomenon, the magnetic flux in the stator coil changes, thereby generating an induced electromotive force in the coil, and then generating current.

[0027] Furthermore, since there is a damping force when the piston rod 312 is extended and retracted relative to the cylinder body 311, the capture of wave energy by the buoyancy box 10 can reduce the rotation amplitude of the first body 11 relative to the second body 12, so that the offshore power generation equipment 100 utilizing photovoltaic and wave energy can achieve the purpose of reducing the shaking of the buoyancy box 10 on the sea surface by utilizing the wave energy power generation device 30, thereby improving the stability and reliability of the offshore power generation equipment 100 utilizing photovoltaic and wave energy.

[0028] The photovoltaic power generation device 20 can efficiently utilize the light resources in the vast sea area. By covering the water surface and reducing water evaporation, it not only helps to protect water resources, but also improves the local ecological environment and maintains the balance of ocean water resources.

[0029] In an embodiment of the present invention, the photovoltaic power generation device 20 is also disposed on the floating box 10, and the photovoltaic power generation device 20 and the wave energy power generation device 30 are spaced apart. The photovoltaic power generation device 20 can convert the light above the sea surface into electric energy. In this way, on the premise of ensuring that the photovoltaic power generation device 20 utilizes the light energy above the sea surface, the normal operation of the wave energy power generation device 30 can be prevented from being affected. Thus, the offshore power generation equipment 100 using photovoltaic and wave energy can simultaneously utilize the wave energy on the sea and the light energy above the sea surface to generate electricity, and then a power generation mode of multi-energy integration can be constructed, significantly improving the energy utilization density per unit area and optimizing the comprehensive energy benefit.

[0030] Moreover, since both the photovoltaic power generation device 20 and the wave energy power generation device 30 are disposed on the upper surface of the floating box 10, it is not only convenient for the production and manufacturing of the offshore power generation equipment 100 using photovoltaic and wave energy, and convenient for the use of the offshore power generation equipment 100 using photovoltaic and wave energy, but also the miniaturization of the offshore power generation equipment 100 using photovoltaic and wave energy can be realized.

[0031] It should be noted that wave energy, as a renewable energy source with high energy density and strong stability, shows great development potential. Compared with wind energy and solar energy, wave energy has a higher energy density and a more extensive resource distribution. The stability of wave energy power generation is relatively strong. Ocean waves are periodic and continuous, which makes wave energy power generation not easily affected by day-night or weather changes, and has a more stable and continuous power generation capacity compared with other renewable energy systems. With the continuous growth of global energy demand, especially in the field of renewable energy, wave energy, as an important part of ocean energy, has great development potential. Fully developing wave energy resources can not only solve the energy supply problem in coastal areas, but also effectively reduce the dependence on traditional energy and reduce environmental pollution.

[0032] The co-generation of photovoltaic and wave energy fully integrates the respective advantages of these two renewable energy sources, significantly improving the energy efficiency of the overall power generation system. The co-generation of the two has an obvious complementary effect. On sunny days or during the day, the photovoltaic system plays a leading role and provides most of the electricity; while on cloudy days, at night or under extreme weather conditions, wave energy continues to generate electricity stably, maintaining the continuity of the system operation. The two work together, not only improving the resource utilization rate, but also optimizing the spatial layout of offshore energy. Through this multi-energy complementary power generation mode, the energy density and operation efficiency of the power generation system can be greatly improved, providing a more stable and efficient solution for offshore energy development.

[0033] Based on an actual engineering project case in the Bohai Bay area of China, the output power of the offshore floating photovoltaic system is 120 W per square meter. In the present invention, the size of the photovoltaic floating box 13 is 7.5 m × 3.75 m, the size of the photovoltaic panel is 2.25 m × 1.5 m, the total area of the upper photovoltaic panels is 202.5 m2, and the installed power generation capacity of the upper photovoltaic power generation device 20 of the entire offshore power generation device 100 that utilizes photovoltaic and wave energy is approximately 24.3 kW. According to the analysis of the measured data in the Bohai Bay, the annual average wave height is about 0.5 m - 0.6 m, the wave period is about 3 s, the receiving width for wave loads in the present invention is about 22.5 m, and the total available wave energy is about 50 kW. According to the statistics of tests and material analysis, the utilization efficiency of existing wave energy capture technologies at home and abroad is about 20% - 30%. Based on this analysis, the installed power generation capacity of the wave energy power generation device 30 in the present invention is about 10 kW, which is nearly half of that of the photovoltaic power generation device 20 in the offshore power generation device 100 that utilizes photovoltaic and wave energy. Under sufficient sunlight conditions, the overall installed power generation capacity of the offshore power generation device 100 that utilizes photovoltaic and wave energy in the present invention is about 35 kW. Under insufficient lighting conditions at night, the installed power generation capacity of the wave energy power generation device can still be maintained at 10 kW, which is a significant improvement compared to the original floating photovoltaic power generation, and greatly improves the power generation efficiency and energy utilization efficiency.

[0034] Thus, on the one hand, by integrating photovoltaic power generation and wave energy power generation in the offshore power generation device 100 that utilizes photovoltaic and wave energy, the efficient utilization of multiple clean energies can be achieved. On the other hand, since the waves on the sea surface can drive the first box body 11 to rotate relative to the second box body 12, the piston rod 312 can be driven to expand and contract relative to the cylinder body 311, thereby realizing power generation. This can make the structure of the offshore power generation device 100 that utilizes photovoltaic and wave energy simple, convenient for maintenance, with high power generation efficiency, and stable and reliable when set on the sea surface. In addition, since the photovoltaic power generation device 20 and the wave energy power generation device 30 are arranged at intervals on the floating box 10, the structure is compact, which is beneficial to the miniaturization of the offshore power generation device 100 that utilizes photovoltaic and wave energy.

[0035] Combined with Figure 5 and Figure 6As shown, the first box body 11 and the second box body 12 are oppositely arranged in the first direction, the hydraulic component 31 extends in the first direction, there are multiple hydraulic components 31, and the multiple hydraulic components 31 are spaced in the second direction, and the first direction and the second direction are perpendicular to each other. Specifically, the first box body 11 and the second box body 12 are oppositely arranged in the first direction, and the hydraulic component 31 is made to extend in the first direction. In this way, the rotation of the first box body 11 relative to the second box body 12 can directly drive the movement of the piston rod 312 relative to the cylinder block 311. This can not only further simplify the structural design of the offshore power generation device 100 that utilizes photovoltaic and wave energy, but also prevent the rotation of the first box body 11 relative to the second box body 12 from being unable to smoothly drive the movement of the piston rod 312 relative to the cylinder block 311, and can further improve the efficiency of the wave energy power generation device 30 in obtaining wave energy.

[0036] In an embodiment of the present invention, in the direction gradually extending from the middle of the floating box 10 to both sides in the second direction, the damping forces of the multiple hydraulic components 31 decrease in sequence. With such a setting, when the waves on the sea surface are small, since the damping force of the hydraulic component 31 located on the more lateral part of the floating box 10 in the second direction is small, the piston rod 312 of the hydraulic component 31 located on the more lateral part of the floating box 10 in the second direction will move relative to the cylinder block 311. And since the damping force of the hydraulic component 31 located closer to the middle of the floating box 10 in the second direction is large, the piston rod 312 of the hydraulic component 31 located closer to the middle of the floating box 10 in the second direction will not move relative to the cylinder block 311. The movement of the piston rod 312 of the hydraulic component 31 located on the more lateral part of the floating box 10 in the second direction relative to the cylinder block 311 can convert wave energy into electric energy. In this way, while ensuring power generation, the rotation amplitude of the first box body 11 relative to the second box body 12 can be reduced, and the stability of the floating box 10 can be improved.

[0037] Further, when the waves on the sea surface are large, the piston rod 312 of the hydraulic component 31 located closer to the lateral part of the floating box 10 in the second direction will move relative to the cylinder block 311, and the piston rod 312 of the hydraulic component 31 located closer to the middle of the floating box 10 in the second direction will move relative to the cylinder block 311. In this way, not only can more wave energy be captured and converted into electric energy, but also the rotation amplitude of the first box body 11 relative to the second box body 12 can be reduced more, and the stability of the floating box 10 can be further improved.

[0038] With such a setting, whether the waves are small or large, the wave energy power generation device 30 of the embodiment of the present invention can smoothly obtain wave energy, which can make the wave energy power generation device 30 obtain wave energy more comprehensively and can improve the power generation efficiency of the wave energy power generation device 30.

[0039] The present invention is configured in such a way that not only can the wave energy generating device 30 capture wave energy of different sizes and convert it into electrical energy, but also when capturing wave energy of different sizes, it can prevent the rotation amplitude of the first box body 11 relative to the second box body 12 from being too large, thereby ensuring the stability of the floating box 10.

[0040] In an embodiment of the present invention, in the direction gradually extending from the middle of the floating box 10 to both sides along the second direction, the heights of the plurality of hydraulic components 31 in the third direction increase in sequence, and the lengths of the plurality of hydraulic components 31 in the first direction increase in sequence. Specifically, since in the direction gradually extending from the middle of the floating box 10 to both sides along the second direction, the damping forces of the plurality of hydraulic components 31 decrease in sequence, the lengths of the plurality of hydraulic components 31 in the first direction and the heights in the third direction increase in sequence in the direction gradually extending from the middle of the floating box 10 to both sides along the second direction. When the sea wave is relatively large and the first box body 11 just starts to rotate relative to the second box body 12, since the lengths of the hydraulic components 31 in the first direction are longer and the heights in the third direction are higher for the hydraulic components 31 closer to both sides in the second direction of the floating box 10, the piston rods 312 in the hydraulic components 31 closer to both sides in the second direction of the floating box 10 can be made to move first; Similarly, since the lengths of the hydraulic components 31 closer to the middle in the second direction of the floating box 10 are shorter and the heights in the third direction are lower, when the relative rotation between the first box body 11 and the second box body 12 reaches a certain angle, the piston rods 312 in the hydraulic components 31 closer to both sides in the second direction of the floating box 10 will be made to move. In this way, the lengths of the plurality of hydraulic components 31 in the first direction and the heights in the third direction can be adapted to their positions on the floating box 10 and their own damping forces, which can better enable the offshore power generation device 100 using photovoltaic and wave energy to collect and capture wave energy.

[0041] Combined Figure 5 and Figure 6 As shown, the plurality of hydraulic components 31 include a first sub-hydraulic component 313, a second sub-hydraulic component 314, and a third sub-hydraulic component 315. The first sub-hydraulic component 313 is arranged in the middle of the floating box 10 in the second direction. The second sub-hydraulic components 314 are two and are respectively arranged on both sides of the first sub-hydraulic component 313 in the second direction at intervals. The third sub-hydraulic components 315 are two, and the two third sub-hydraulic components 315 are respectively arranged on one side of the two second sub-hydraulic components 314 in the second direction at intervals. With such an arrangement, not only can the distribution of the plurality of hydraulic components 31 on the floating box 10 be more reasonable, but also the force when the first box body 11 rotates relative to the second box body 12 can be more uniform, so that on the premise of ensuring more sufficient capture of wave energy, the floating box 10 is more stable.

[0042] Combined Figure 5 andFigure 6 As shown, the cylinder block 311 of one of the two second sub-hydraulic assemblies 314 is connected to the first box body 11, and the cylinder block 311 of the other of the two second sub-hydraulic assemblies 314 is connected to the second box body 12; the cylinder block 311 of one of the two third sub-hydraulic assemblies 315 is connected to the first box body 11, and the cylinder block 311 of the other of the two second sub-hydraulic assemblies 314 is connected to the second box body 12; the cylinder block 311 of one of the adjacent second sub-hydraulic assembly 314 and third sub-hydraulic assembly 315 is connected to the first box body 11, and the cylinder block 311 of the other is connected to the second box body 12. With such an arrangement, not only can the distribution of the wave energy power generation device 30 on the floating box 10 be made more uniform, but after the relative rotation of the first box body 11 and the second box body 12, the force uniformity of the first box body 11 and the second box body 12 can be further improved, thereby further enhancing the stability of the floating box 10 on the sea surface.

[0043] Combined with Figure 5 and Figure 6 As shown, a first base 111 and a second base 121 are respectively arranged on the first box body 11 and the second box body 12. In each hydraulic assembly 31, one of the cylinder block 311 and the piston rod 312 is rotatably connected to the first base 111, and the other of the cylinder block 311 and the piston rod 312 is rotatably connected to the second base 121. Specifically, by respectively arranging the first base 111 and the second base 121 on the first box body 11 and the second box body 12, and making one of the cylinder block 311 and the piston rod 312 rotatably connected to the first base 111, and the other of the cylinder block 311 and the piston rod 312 rotatably connected to the second base 121, with such an arrangement, on the premise of ensuring that the cylinder block 311 and the piston rod 312 conform to the relative rotation of the first box body 11 relative to the second box body 12, the connection stability and firmness of the cylinder block 311 and the piston rod 312 with the first box body 11 and the second box body 12 are improved.

[0044] Combined with Figures 1 - 7 As shown, the rotation direction of the cylinder block 311 relative to the floating box 10 is the same as the rotation direction of the first box body 11 relative to the second box body 12, and the rotation direction of the piston rod 312 relative to the floating box 10 is the same as the rotation direction of the first box body 11 relative to the second box body 12. With such an arrangement, the relative rotation of the first box body 11 relative to the second box body 12 can directly drive the movement of the piston rod 312 relative to the cylinder block 311, which can prevent the movement of the piston rod 312 relative to the cylinder block 311 from getting stuck, and can further enhance the stability and reliability of the offshore power generation device 100 using photovoltaic and wave energy.

[0045] Combined with Figure 6As shown, in each hydraulic component 31, the oil inlet 3112 is closer to the middle of the floating box 10 in the first direction than the oil outlet 3111. Specifically, by making the oil inlet 3112 in each hydraulic component 31 closer to the middle of the floating box 10 in the first direction than the oil outlet 3111, in this way, when the piston rod 312 is compressed inward relative to the cylinder block 311, the piston rod 312 moves in a direction away from the middle of the floating box 10 in the first direction, so that the hydraulic oil can be directly driven to flow out from the oil outlet 3111. When the piston rod 312 is stretched outward relative to the cylinder block 311, the piston rod 312 moves in a direction closer to the middle of the floating box 10 in the first direction, so that the hydraulic oil in the oil outlet fuel tank 322 enters the cylinder block 311 from the oil inlet 3112. This can make the settings of the oil inlet 3112 and the oil outlet 3111 adapt to the moving direction of the piston rod 312 relative to the cylinder block 311, ensure the pressure difference between the oil outlet fuel tank 322 and the oil receiving fuel tank 323, and thus ensure the normal power generation of the power generation component.

[0046] Combined with Figure 6 As shown, the power generation component 32 includes a first sub-power generation component 324 and a second sub-power generation component 325. Both the first sub-power generation component 324 and the second sub-power generation component 325 include a generator 321, an oil outlet fuel tank 322 and an oil receiving fuel tank 323. The first sub-power generation component 324 is arranged in the first box body 11, and the cylinder block 311 rotatably connected to the first box body 11 is correspondingly communicated with the first sub-power generation component 324. The cylinder block 311 rotatably connected to the second box body 12 is correspondingly communicated with the second sub-power generation component 325. Specifically, since a part of the cylinder blocks 311 in the plurality of hydraulic components 31 are arranged in the first box body 11 and another part of the cylinder blocks 311 are arranged in the second box body 12, therefore, by arranging the first sub-power generation component 324 on the first box body 11 and the second sub-power generation component 325 on the second box body 12, and making the first sub-power generation component 324 communicate with the cylinder block 311 on the first box body 11 and the second sub-power generation component 325 communicate with the cylinder block 311 on the second box body 12, this can make the flow path of the hydraulic oil shorter and further improve the power generation efficiency of the power generation component 32. Combined with Figure 6As shown, an oil outlet check valve 3113 is provided at the oil outlet 3111, and an oil inlet check valve 3114 is provided at the oil inlet 3112. Specifically, the oil outlet check valve 3113 is provided at the oil outlet 3111. When the hydraulic oil enters the oil collection tank 323 from the cylinder block 311 through the oil outlet 3111, the oil outlet check valve 3113 can ensure the unidirectional flow of the hydraulic oil from the oil outlet 3111 to the oil collection tank 323 and prevent the hydraulic oil from flowing back. The oil inlet check valve 3114 is provided at the oil inlet 3112. When the hydraulic oil enters the cylinder block 311 from the oil outlet tank 322 through the oil inlet 3112, the oil inlet check valve 3114 can ensure the unidirectional flow of the hydraulic oil from the oil inlet 3112 into the cylinder block 311 and prevent the hydraulic oil from flowing back. In this way, the structural design of the wave energy power generation device 30 can be further optimized.

[0047] Combined with Figure 3 and Figure 4 As shown, the floating box 10 may mainly include a photovoltaic floating box 13 and a wave energy power generation floating box 14. The photovoltaic power generation device 20 is arranged on the photovoltaic floating box 13, and the wave energy power generation device 30 is arranged on the wave energy power generation floating box 14. The photovoltaic floating box 13 is circumferentially arranged around the outside of the wave energy power generation floating box 14 and is connected to the wave energy power generation floating box 14. Specifically, the photovoltaic floating box 13 is circumferentially arranged around the outside of the wave energy power generation floating box 14 and is connected to the wave energy power generation floating box 14. And the photovoltaic power generation device 20 is arranged on the photovoltaic floating box 13, and the wave energy power generation device 30 is arranged on the wave energy floating box 10. In this way, not only can the photovoltaic power generation device 20 and the wave energy power generation device 30 be prevented from interfering with each other, ensuring the independence of the power generation of both, but also the structure of the offshore power generation device 100 using photovoltaic and wave energy can be made more compact, and the offshore power generation device 100 using photovoltaic and wave energy can be made more miniaturized.

[0048] Combined with Figure 3 and Figure 4As shown, the photovoltaic floating box 13 includes a first photovoltaic sub-floating box 131 and a second photovoltaic sub-floating box 132. The first photovoltaic sub-floating box 131 and the second photovoltaic sub-floating box 132 are oppositely arranged in the first direction and are rotatably connected; the wave energy generating floating box 14 includes a first wave sub-floating box 141 and a second wave sub-floating box 142. The first wave sub-floating box 141 and the second wave sub-floating box 142 are oppositely arranged and are rotatably connected; the first photovoltaic sub-floating box 131 is at least partially circumferentially arranged outside the first wave sub-floating box 141 and together with the first wave sub-floating box 141 forms a first box body 11. The second photovoltaic sub-floating box 132 is at least partially circumferentially arranged outside the second wave sub-floating box 142 and together with the second wave sub-floating box 142 forms a second box body 12. With such an arrangement, the structural design of the floating box 10 can be optimized. On the premise of ensuring that the normal rotation of the first box body 11 and the second box body 12 is not affected, the arrangement of the photovoltaic floating box 13 and the wave floating box 10 can be made more reasonable, and the structural compactness of the floating box 10 can be further improved.

[0049] In some embodiments of the present invention, a main shaft 16 is provided between the first box body 11 and the second box body 12. The main shaft 16 extends in the second direction. The first wave sub-floating box 141 and the second wave sub-floating box 142 are rotatably connected to a part of the main shaft 16 in the second direction, and the first photovoltaic sub-floating box 131 and the second photovoltaic sub-floating box 132 are rotatably connected to another part of the main shaft 16 in the second direction.

[0050] In some embodiments of the present invention, the first wave sub-floating box 141 and the first photovoltaic sub-floating box 131 are welded and fixed to form the first box body 11, and the second wave sub-floating box 142 and the second photovoltaic sub-floating box 132 are welded and fixed to form the second box body 12. There are upper and lower welding points between adjacent sub-floating boxes, so that each side structure forms an independent small floating body unit. This modular design not only simplifies the assembly process of the floating box 10, but also shows great flexibility in later maintenance. Maintenance personnel can quickly disassemble and replace individual modules without large-scale disassembly of the entire floating box 10 structure, thus significantly reducing the maintenance cost and effectively improving the reliability of the system operation.

[0051] Combined Figure 3 and Figure 4As shown in the figure, the photovoltaic power generation device 20 includes a photovoltaic component 22 and a support component 21. The photovoltaic component 22 is arranged on the photovoltaic floating box 13 through the support component 21. There are multiple photovoltaic components 22, and the multiple photovoltaic components 22 are arranged at intervals on the photovoltaic floating box 13. Specifically, by arranging the photovoltaic component 22 on the photovoltaic floating box 13 through the support component 21, the support component 21 can provide support for the photovoltaic component 22, which can not only ensure the stability and reliability of the installation of the photovoltaic component 22 on the floating box 10, but also prevent the photovoltaic component 22 from directly contacting seawater, effectively reducing the risk of corrosion of the photovoltaic component 22 and extending the service life of the photovoltaic component 22.

[0052] Furthermore, the photovoltaic components 22 are arranged in multiple numbers, and the multiple photovoltaic components 22 are arranged at intervals on the photovoltaic floating box 13, which can not only improve the power generation efficiency of the photovoltaic power generation device 20.

[0053] In some embodiments of the present invention, the sun in the sky above the sea is moving, and the support component 21 can move according to the direction of sunlight, so that the support component 21 drives the photovoltaic component 22 to always face the sun in the sky above the sea, which can further improve the power generation efficiency of the photovoltaic component 22.

[0054] Combined with Figure 1 and Figure 2 As shown in the figure, the offshore power generation device 100 using photovoltaic and wave energy further includes a cable 40. One end of the cable 40 is connected to the circumferential edge of the floating box 10, and an anchor pile 41 is arranged at the other end. The anchor pile 41 is adapted to be connected and fixed to the seabed. There are multiple cables 40, and the multiple cables 40 are arranged at intervals on the circumferential edge of the floating box 10. Specifically, by connecting one end of the cable 40 to the circumferential edge of the floating box 10 and arranging an anchor pile 41 at the other end of the cable 40, after the offshore power generation device 100 using photovoltaic and wave energy is arranged on the sea surface, the anchor pile 41 on the cable 40 is connected to the seabed of the seabed, so that the offshore power generation device 100 using photovoltaic and wave energy can be fixed on the sea. The cables 40 are arranged in multiple numbers, and the multiple cables 40 are arranged at intervals on the circumferential edge of the floating box 10, which can not only make the force on the floating box 10 more uniform, and the floating box 10 can maintain stability under the action of sea surface wind, waves and currents, but also further improve the stability and reliability of the offshore power generation device arranged on the sea.

[0055] Combined with Figure 1 and Figure 2 As shown in the figure, the angle formed by the intersection of the two side edges of the floating box 10 is defined as the end angle. Two connecting parts 401 are arranged at one end of each cable 40, and the two connecting parts 401 are respectively connected to the two side edges of the end angle of the floating box 10, which can further improve the connection and fixing strength between the cable 40 and the floating box 10.

[0056] Combined with Figure 1 andFigure 2 As shown, lifting lugs 15 are provided on both sides of each end corner of the floating box 10, and the connecting portion 401 is fixedly connected to the lifting lugs 15, which can further improve the stability and reliability of the connection and fixation between the cable 40 and the floating box 10.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation to the present invention.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An offshore power generation device utilizing photovoltaic and wave energy, characterized in that: include: A buoyancy box, the buoyancy box comprising a first box body and a second box body, the first box body and the second box body are rotatably connected, and the buoyancy box is suitable for floating on the sea surface; A photovoltaic power generation device, wherein the photovoltaic power generation device is arranged on the buoyancy tank; A wave energy power generation device, the wave energy power generation device is arranged on the buoy and is spaced apart from the photovoltaic power generation device, the wave energy power generation device comprises a hydraulic assembly and a power generation assembly, the hydraulic assembly comprises a cylinder body and a piston rod, one end of the piston rod is telescopically arranged in the cylinder body, the other end of the piston rod is rotatably connected to one of the first box body and the second box body, and the cylinder body is rotatably connected to the other of the first box body and the second box body; The power generation assembly includes a generator, an oil outlet tank and an oil receiving tank. The oil outlet tank is connected to the oil inlet of the cylinder body, the oil receiving tank is connected to the oil outlet of the cylinder body, and the generator is connected between the oil outlet tank and the oil receiving tank.

2. The offshore power generation device using photovoltaic and wave energy according to claim 1, characterized in that: The first box body and the second box body are arranged opposite to each other in a first direction, the hydraulic assembly extends in the first direction, there are multiple hydraulic assemblies, and the multiple hydraulic assemblies are arranged at intervals in a second direction, and the first direction and the second direction are perpendicular to each other.

3. The offshore power generation equipment using photovoltaic and wave energy according to claim 2, characterized in that: In a direction gradually extending from the middle of the buoyancy box along the second direction toward both sides, the damping forces of the plurality of hydraulic components decrease in sequence.

4. The offshore power generation equipment using photovoltaic and wave energy according to claim 3, characterized in that: In a direction gradually extending from the middle of the buoyancy box along the second direction toward both sides, the heights of the plurality of hydraulic assemblies in the third direction increase sequentially, and the lengths of the plurality of hydraulic assemblies in the first direction increase sequentially.

5. The offshore power generation device using photovoltaic and wave energy according to claim 4, characterized in that: The hydraulic assembly includes a first sub-hydraulic assembly, a second sub-hydraulic assembly and a third sub-hydraulic assembly. The first sub-hydraulic assembly, the second sub-hydraulic assembly and the third sub-hydraulic assembly all include the cylinder body and the piston rod. The first sub-hydraulic assembly is arranged in the middle of the second direction of the buoyancy box, the second sub-hydraulic assembly is two and is respectively spaced apart on both sides of the second direction of the first sub-hydraulic assembly, the third sub-hydraulic assembly is two and the two third sub-hydraulic assemblies are respectively spaced apart on one side of the second direction of the two second sub-hydraulic assemblies.

6. The offshore power generation device using photovoltaic and wave energy according to claim 5, characterized in that: The cylinder of one of the two second hydraulic sub-assemblies is connected to the first tank, and the cylinder of the other of the two second hydraulic sub-assemblies is connected to the second tank; The cylinder of one of the two third sub-hydraulic assemblies is connected to the first tank, and the cylinder of the other of the two second sub-hydraulic assemblies is connected to the second tank; The cylinder body of one of the adjacent second sub-hydraulic assembly and the third sub-hydraulic assembly is connected to the first housing, and the cylinder body of the other one is connected to the second housing.

7. The offshore power generation device using photovoltaic and wave energy according to claim 1, characterized in that: The power generation assembly includes a first sub-power generation assembly and a second sub-power generation assembly, and the first sub-power generation assembly and the second sub-power generation assembly both include the generator, the oil outlet tank and the oil receiving tank. The first sub-power generation assembly is arranged in the first box body, and the cylinder body rotatably connected to the first box body is correspondingly connected to the first sub-power generation assembly, and the cylinder body rotatably connected to the second box body is correspondingly connected to the second sub-power generation assembly.

8. The offshore power generation device using photovoltaic and wave energy according to claim 1, characterized in that: The buoy includes a photovoltaic buoy and a wave power generation buoy. The photovoltaic power generation device is arranged on the photovoltaic buoy. The wave power generation device is arranged on the wave power generation buoy. The photovoltaic buoy is circumferentially arranged on the outside of the wave power generation buoy and is connected to the wave power generation buoy.

9. The offshore power generation device using photovoltaic and wave energy according to claim 8, characterized in that: The photovoltaic power generation device comprises a photovoltaic component and a support component. The photovoltaic component is arranged on the photovoltaic buoyancy box through the support component. There are multiple photovoltaic components, and the multiple photovoltaic components are arranged at intervals on the photovoltaic buoyancy box.

10. The offshore power generation equipment according to claim 1, characterized in that: It also includes a cable, one end of which is connected to the circumferential edge of the buoyancy box, and the other end is provided with an anchor pile, the anchor pile is suitable for connecting and fixing with the seabed, and the cables are multiple, and the multiple cables are arranged at intervals on the circumferential edge of the buoyancy box.

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