Mariculture platform for photovoltaic solar energy, wind power energy and wave hydraulic power generation

Abstract

The invention discloses a photovoltaic solar energy, wind power energy and wave hydraulic power generation mariculture platform which comprises a photovoltaic solar power generation device, a wave energy hydraulic power generation device, a wind power generator set, a culture net cage and an offshore platform. The wave energy hydraulic power generation device comprises a wave capturing floating body, a hydraulic cylinder, an energy accumulator, a hydraulic motor and a power generator; the energy accumulator comprises a shell, an inflation assembly and an air bag, an oil inlet valve is arranged below the shell, and a mushroom-shaped valve, a spring and a sealing assembly are arranged between the oil inlet valve and the air bag; the filter comprises a filter cavity, a filter plate supply cabin, a waste filter plate collection cabin, a spring seat plate, a filter plate replacement motor and a control panel; a pressure difference sensor is arranged in the filter cavity, the filter plate replacement motor is connected with a tensioning roller, and a tensioning rope is arranged between the tensioning roller and the spring seat plate; a spring is connected between the filter cavity and the spring seat plate; and a push rod is arranged between the spring seat plate and the filter plate supply cabin. Through multi-energy cooperative complementation of photovoltaic solar energy, wave energy and wind energy, the intermittent defect of single-energy power generation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to offshore platforms in the field of ocean engineering, in particular to an offshore aquaculture platform with photovoltaic solar energy, wind energy and wave hydraulic power generation. BACKGROUND

[0002] Under the background of the continuous growth of global energy demand and the increasing urgency of addressing climate change, the development and utilization of clean and renewable energy has become a key strategic choice, among which the development of marine energy has attracted much attention. Onshore centralized photovoltaic power faces the problem of land shortage, while the coastal economically developed areas have high power load and excellent sea light conditions, which is promoting offshore photovoltaic power to become a new field of marine energy development. However, the maintenance cost of offshore photovoltaic power is relatively high, and the offshore environment is complex, which needs to resist wind and wave, bird droppings and other adverse factors, making the design and manufacture of photovoltaic equipment more expensive. The current conventional offshore floating photovoltaic power generally lacks the ability to adaptively track the solar azimuth angle and the ability to automatically clean.

[0003] Wave energy is one of the most important energy sources in ocean energy, and is a kind of renewable and clean energy that can be directly utilized and inexhaustibly. Wave energy resources are abundant, and the use of wave energy for power generation can meet the increasing demand for electricity. Conventional wave energy generation devices mainly include oscillating water column type, overwave type, nodding duck type and pendulum type. As the largest resource in ocean energy and the most easily directly utilized category, the existing technical solutions are difficult to break through the bottleneck of "low efficiency, short service life and high energy storage cost" due to structural design defects. Traditional wave energy generation devices will be corroded by salt mist, cavitated and silted, resulting in reduced service life of components. The energy storage module of the traditional wave energy generation device is designed as an external type, and the energy storage battery group and the power generation hydraulic motor are separated in different cabins and connected through a long cable. In thunderstorm weather, the output voltage of wave energy fluctuates greatly, and the external energy storage module cannot respond quickly to voltage changes, so a larger rated capacity of energy storage battery needs to be configured to avoid power failure, resulting in a higher ratio of energy storage system cost to total device cost. In addition, the separated structure increases the number of cabins, which reduces the overall sealing performance of the device and makes it prone to water ingress in heavy rain, causing short circuit failure of the energy storage battery. In the wave energy generation device, the hydraulic conversion system often causes pressure fluctuation due to wave pulsation, resulting in reduced efficiency of the hydraulic motor. At the same time, the traditional filter needs to be replaced regularly, and the reliability is poor in the unattended offshore environment.

[0004] The existing offshore wind power device is difficult to adapt to the marine environment due to the design defects of the foundation and the main structure. The mainstream column type wind turbine adopts a traditional single pile foundation, the bottom stiffness is concentrated, the column heave is super stable threshold under the wind and wave, and the whole machine shaking is intensified. The blade airfoil follows the design on land, and the "wind and wave coupled airflow" is not optimized on the sea, and the risk of flutter instability is high. The connection part of the foundation and the column is easy to corrode and crack due to stress concentration, which increases the equipment failure probability, and increases the operation and maintenance difficulty and cost. In addition, although the integration of multi-energy system and deep sea aquaculture net cage is a front direction to solve the energy bottleneck of aquaculture, the existing scheme has the problems of structural segmentation and non-synergistic function: the energy device and the net cage are arranged separately, only share the anchoring system, rely on long distance underwater cable transmission, and the cable protection does not consider the attachment of marine organisms and the relative motion of the device, which is easy to break and increase power transmission loss; the oxygenation and temperature control equipment of the net cage is not linked with the energy storage module, and still relies on independent backup power supply, which is easy to cause aquaculture accidents due to power failure when the energy output fluctuates, and cannot realize the deep synergy of "energy-aquaculture".

[0005] At the same time, with the acceleration of deep sea development process, the single energy generation platform has the problems of large output power fluctuation and high cost due to the restriction of natural conditions. The existing offshore photovoltaic device mostly adopts fixed inclination design, and the photovoltaic solar energy utilization rate is insufficient, and the salt spray and dust on the sea easily lead to panel fouling, and the cost of artificial cleaning accounts for more than 40% of the total operation cost.

[0006] In summary, the existing offshore wind power, multi-energy complementary and energy-aquaculture integrated technology all have the problems of poor stability, high maintenance cost and high aquaculture risk due to insufficient structural resistance, missing system synergy and disconnection of function linkage, and need to break through the technical bottleneck through structural innovation to promote the development of this field to large-scale and commercial application. SUMMARY

[0007] The present application provides a photovoltaic solar energy, wind energy and wave hydraulic power generation offshore aquaculture platform, which combines photovoltaic solar power generation device, wave energy hydraulic power generation device and wind turbine together to realize power generator sharing and multi-energy complementation, thereby improving power generation efficiency and reducing construction and maintenance cost. The photovoltaic solar power generation device improves power generation efficiency through the adjusting device. The wind turbine is arranged in the middle of the offshore platform, and the devices on both sides reduce the rolling of the wind turbine and absorb the kinetic energy of waves to reduce instability rate. Part of the electric energy is supplied to the daily electricity of the aquaculture net cage, and part of the electric energy is transmitted to the land through the submarine cable.

[0008] The offshore aquaculture platform for photovoltaic solar energy, wind energy and wave hydraulic power generation includes photovoltaic solar power generation device, wave energy hydraulic power generation device, wind turbine, aquaculture net cage and offshore platform.

[0009] The wave energy hydraulic power generation device comprises a wave capturing float, a hydraulic cylinder, an accumulator, a hydraulic motor and a generator; one end of the hydraulic cylinder is connected with a piston rod, and a connector is hinged between the wave capturing float and the piston rod; a check valve, a filter and an oil tank are arranged at an oil outlet of the hydraulic motor; a speed increasing gear box is connected between the hydraulic motor and the generator;

[0010] The accumulator comprises a shell, an inflation assembly and an air bag; an oil inlet valve is arranged at the lower part of the shell; a mushroom valve, a spring and a sealing assembly are arranged between the oil inlet valve and the air bag; the spring is sleeved on the mushroom valve.

[0011] The filter comprises a filter cavity, a filter plate supply cabin, a waste filter plate collection cabin, a spring seat plate, a filter plate replacement motor and a control plate; the filter plate supply cabin is internally provided with a top filter plate, a middle filter plate and a bottom filter plate; the top filter plate is provided with a pre-tightening spring at the upper part thereof; the filter cavity is internally provided with a differential pressure sensor in communication with the control plate; the filter plate replacement motor is connected with a tensioning roller; the tensioning roller and the spring seat plate are provided with a tensioning rope therebetween; the spring is connected between the filter cavity and the spring seat plate; the spring seat plate and the filter plate supply cabin are connected with a push rod; the filter plate supply cabin is provided with an opening at the bottom part thereof; the push rod is pushed to the waste filter plate collection cabin through the opening under the actions of the filter plate replacement motor, the tensioning roller and the spring.

[0012] The photovoltaic solar power generation device comprises a photovoltaic rotating platform, a photovoltaic platform, a sensor and a self-cleaning device; the photovoltaic platform is provided with a first motor between the photovoltaic rotating platform; the photovoltaic rotating platform is hingedly provided with a photovoltaic solar panel at one end; the photovoltaic solar panel is provided with an angle adjusting assembly between the bottom part thereof and the photovoltaic rotating platform.

[0013] The angle adjusting assembly comprises a sensor, a second motor, a lead screw arranged on the photovoltaic rotating platform and a fixing block at the bottom part of the photovoltaic solar panel; the lead screw is provided with a lead screw sliding block; the fixing block and the lead screw sliding block are provided with a connecting rod therebetween.

[0014] The photovoltaic solar panel is connected with a pin shaft between the photovoltaic rotating platform, so that the photovoltaic solar panel adjusts the angle with the horizontal plane under the action of the angle adjusting assembly.

[0015] The photovoltaic solar panel is provided with a spray head; the spray head regularly cleans the photovoltaic solar panel.

[0016] The inflation assembly comprises an inflation valve, an inflation valve cap, a protection cap and a stop ring; the inflation valve is arranged at the upper part of the shell; the air bag is connected with the inflation valve; the inflation valve is fixed on the upper part of the shell by the stop ring.

[0017] The sealing assembly comprises a rubber supporting ring, a check ring, a sealing ring, a snap ring and a screw; the rubber supporting ring, the check ring, the sealing ring and the snap ring are arranged between the oil inlet valve and the snap ring.

[0018] The wind turbine generator set comprises a horizontal axis wind turbine and a vertical axis wind turbine.

[0019] The culture net cage is connected with a support, and the culture net cage is fixed below the offshore platform through the support.

[0020] The wave energy hydraulic power generation device is symmetrically installed on the offshore platform.

[0021] Working principle: the photovoltaic solar power generation device in the application automatically drives the lead screw mechanism to adjust the inclination and orientation of the solar photovoltaic panel according to the light intensity, environmental wind speed and pressure signals fed back by the multi-parameter integrated sensor, so as to ensure that the solar photovoltaic panel is always in a state of structural safety and optimal photovoltaic solar energy capture, and maximize the photovoltaic solar energy capture efficiency; the cleaning nozzle cooperates with the angle adjusting assembly to clean the dust on the surface of the solar photovoltaic panel, so as to avoid the influence of the shielding of the dust on power generation; the wave energy hydraulic power generation device is composed of a wave capturing float, a connector, a hydraulic cylinder, a piston rod, a pipeline, a check valve, an oil tank, an accumulator, a filter, a hydraulic motor and a generator; the connector drives the piston rod to make reciprocating motion in the hydraulic cylinder under the action of the wave to compress the hydraulic oil to form high-pressure oil flow, so as to drive the work of the hydraulic motor and the work of the generator; the culture net cage is installed below the offshore platform, and part of the power of the generator supplies the demand of the culture net cage; the wind turbine generator set includes a horizontal axis wind turbine and a vertical axis wind turbine.

[0022] The working method of the offshore culture platform for photovoltaic solar energy, wind energy and wave hydraulic power generation includes the following steps:

[0023] 1) the wave drives the wave capturing float to oscillate up and down to drive the connector to move, and then drives the piston rod connected with the connector to periodically compress the hydraulic oil in the hydraulic cylinder to increase the pressure; part of the hydraulic oil in the hydraulic cylinder is input into the hydraulic motor through the pipeline to drive the work, and another part of the hydraulic oil flows into the accumulator for energy storage;

[0024] 2) while the hydraulic oil enters the accumulator through the oil inlet valve, the oil pressure synchronously extrudes the mushroom valve and the spring, so that the air bag is compressed and deformed, at this time, the air pressure in the air bag increases with the decrease of the volume, and the oil energy is converted into gas potential energy in the air bag and stored; when the wave energy input decays to reduce the pressure of the hydraulic circuit, the high-pressure gas in the air bag will expand reversely to push the oil out of the shell to the hydraulic motor;

[0025] 3) When the filter plate is unblocked, the oil flowing out of the oil outlet of the hydraulic motor enters the filter cavity and flows back to the oil tank after being filtered by the filter plate; when the filter plate is blocked, the pressure difference of the inlet of the filter cavity increases; when the pressure difference exceeds the set threshold, the pressure difference sensor sends a signal to the control board to make the filter plate replacement motor rotate forward and retract the tensioning rope by rotating the tensioning roller, thereby pulling the spring seat plate to move and compress the compression spring; the pre-tightening spring extrudes the filter plate to the inlet of the filter plate supply cabin, and the push rod pushes out a filter plate in the filter plate supply cabin under the action of the spring seat plate, and at the same time, the filter plate in the filter cavity is pushed into the waste filter plate collection cabin, and the oil way pressure difference returns to normal, the control board controls the filter plate replacement motor to reverse, and the compressed compression spring is elongated to push the spring seat plate and the push rod back to the original position; the pre-tightening spring in the filter plate supply cabin is elongated by a distance equal to the thickness of the filter plate and pushes the remaining filter plate to the inlet of the filter plate supply cabin; the hydraulic oil flowing out of the oil outlet of the hydraulic motor is filtered by the filter and flows back to the oil tank through the pipeline, forming a hydraulic circulation loop; at the same time, the hydraulic motor drives the generator to generate electricity through the speed increasing gear box.

[0026] 4) The sensor of the photovoltaic solar power generation device transmits the signal of the energy size to the angle adjusting assembly, and the optimal angle of the photovoltaic solar panel is adjusted.

[0027] Beneficial effects: Compared with the prior art, the present application has the following advantages:

[0028] (1) The photovoltaic solar power generation device in the present application has an angle adjusting assembly and a self-cleaning device, and a multi-parameter integrated sensor transmits a signal to the angle adjusting assembly according to the size of the received energy, so as to adjust the optimal angle of the photovoltaic solar panel; when the nozzle cleans the photovoltaic solar panel, the photovoltaic solar panel has an inclination angle, which is convenient for cleaning; the angle adjusting assembly makes the photovoltaic solar power generation device always in a safe structure and an optimal state of photovoltaic solar energy capture, improves the power generation efficiency and safety, and reduces the maintenance cost.

[0029] (2) The wave capturing float in the wave energy hydraulic power generation device cooperates with the piston rod through the connector, and the mechanical energy is directly converted into hydraulic energy, so that the transmission efficiency is high, and the power generation capacity is also improved accordingly; the key components such as the oil cylinder and the piston rod do not directly contact seawater, and the hydraulic oil has lubrication and corrosion resistance, which improves the service life of the device and reduces the operation and maintenance cost.

[0030] (3) The oil liquid in the prior art is easy to produce metal debris due to relative movement of hydraulic cylinder, piston rod and other components when circulating in the device hydraulic circuit, and small solid impurities in seawater can be mixed, if the impurities enter the hydraulic motor or control valve group, parts wear will be aggravated and failure probability will be increased; therefore, the wave energy hydraulic power generation device is provided with a filter, the filter not only efficiently intercepts and filters impurities, but also integrates blockage detection and automatic replacement functions, filter plate state is monitored in real time, filter plate replacement is automatically completed when blockage is detected, and oil liquid cleanliness and circuit smoothness are ensured; in view of the fact that hydraulic energy generated by the wave capturing float fluctuating with waves has instantaneous and pulsating characteristics during wave energy capturing. The accumulator is taken as a hydraulic energy regulation and control core component, the accumulator stores the instantaneous and pulsating hydraulic energy captured by the wave capturing float first, and then outputs the hydraulic energy at a stable and controllable flow and pressure, and the accumulator plays an overload protection function in a typhoon or a rough wave condition.

[0031] (4) The wind turbine generator set in the application is composed of a horizontal axis wind turbine and multiple vertical axis wind turbines, the horizontal axis wind turbine has the highest efficiency in a high wind speed area, the vertical axis wind turbine has a low starting wind speed, and fills the loss of horizontal axis yawing and the influence of wake; and the vertical axis wind turbine has a low center of gravity and small gyroscopic moment, and is arranged at four corners of the platform to form a damper effect, reduce platform yawing and rolling, and reduce mooring load and fatigue.

[0032] (5) The wind turbine generator set in the application is arranged between two groups of photovoltaic solar power generation devices, wave energy hydraulic power generation devices and culture net cages, such an arrangement not only shares the generator, but also reduces the rolling of the wind turbine generator set, absorbs kinetic energy brought by waves and reduces the possibility of instability, and improves the economy and safety of the device. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a front view structural schematic diagram of the offshore culture platform of the application for photovoltaic solar energy, wind energy and wave hydraulic power generation;

[0034] Figure 2 It is an isometric structural schematic diagram of the offshore culture platform of the application for photovoltaic solar energy, wind energy and wave hydraulic power generation;

[0035] Figure 3 It is a top view structural schematic diagram of the offshore culture platform of the application for photovoltaic solar energy, wind energy and wave hydraulic power generation;

[0036] Figure 4 It is a horizontal state structural schematic diagram of the photovoltaic solar power generation device in the application;

[0037] Figure 5 It is an inclination state structural schematic diagram of the photovoltaic solar power generation device in the application;

[0038] Figure 6 The vertical state structure schematic diagram of the photovoltaic solar power generation device in the application;

[0039] Figure 7 The isometric structure schematic diagram of the wave energy hydraulic power generation device in the application;

[0040] Figure 8 The cross-sectional schematic diagram of the energy accumulator device in the wave energy hydraulic power generation device in the application;

[0041] Figure 9 The cross-sectional schematic diagram of the filter device in the wave energy hydraulic power generation device in the application;

[0042] Figure 10 The structure schematic diagram of the wind turbine generator set in the application. DETAILED DESCRIPTION

[0043] The application will be further described below in combination with the drawings.

[0044] As shown in the drawings, Figures 1 to 3 The offshore aquaculture platform of the photovoltaic solar energy, wind energy and wave hydraulic power generation in the application includes the photovoltaic solar power generation device, the wave energy hydraulic power generation device, the wind turbine generator set, the net cage 33 and the offshore platform 11.

[0045] The wind turbine generator set is installed between two groups of the photovoltaic solar power generation device, the wave energy hydraulic power generation device and the net cage 33, and the two groups are symmetrically installed. Such installation mode not only shares the generator, but also reduces the rolling of the wind turbine generator set, absorbs the kinetic energy brought by the wave and reduces the instability rate, improves the economy and safety of the offshore aquaculture platform. The net cage 33 is connected with the support 36.

[0046] As shown in the drawings, Figure 4 The photovoltaic solar power generation device includes the photovoltaic solar panel 16, the photovoltaic rotating platform 52, the photovoltaic platform 8, the angle adjusting assembly and the self-cleaning device, and the drawing is the horizontal state structure schematic diagram of the photovoltaic solar power generation device.

[0047] The angle adjusting assembly includes the second motor 58, the fixed bearing seat 34, the motor seat 15, the multi-parameter integrated sensor 50, the lead screw 25, the connecting rod 29, the lead screw sliding block 45 and the fixed seat 65.

[0048] The base of the first motor 22 is fixed on the photovoltaic platform 8 by the motor base 15, the motor shaft of the first motor 22 is fixed below the photovoltaic rotating platform 52 by the fixed bearing seat 34 and the bolt 65, the first motor 22 controls the positive and negative rotation of the motor shaft according to the data transmitted by the multi-parameter integrated sensor 50 to control the rotation of the photovoltaic rotating platform 52 by 360 degrees in the horizontal direction, so that the photovoltaic solar panel 16 is adjusted to the target posture: in extreme weather, the photovoltaic panel is parallel or at a large inclination angle to the wind direction to reduce wind resistance and avoid snow overload, and the structural safety is ensured; in normal working condition, the light receiving surface of the photovoltaic panel is perpendicular to the sunlight, accurately matching the real-time azimuth angle of the sun, and realizing the optimal capture of photovoltaic solar energy.

[0049] The photovoltaic solar panel 16 is hinged on the photovoltaic rotating platform 52 through the pin shaft 60, the bottom of the photovoltaic solar panel 16 has a fixed block 65, one end of the connecting rod 29 is hinged on the fixed block 65, and the other end is hinged on the screw block 45, and the second motor 58 is matched with the screw rod 25. The second motor 58 controls the positive and negative rotation of the motor shaft according to the data transmitted by the sensor 50, so as to drive the rotation of the screw rod 25, and then drive the movement of the screw block 45 on the screw rod 25, so as to realize the conversion of the plane of the photovoltaic solar panel 16 between 0 degrees and 90 degrees with the horizontal plane.

[0050] The adjusting device performs multi-parameter fusion analysis based on the light intensity, environmental wind speed and pressure signals fed back by the multi-parameter integrated sensor 50, adopts a dynamic regulation and control strategy of double target collaborative optimization, accurately regulates and controls the photovoltaic solar panel 16 to the target posture considering the structural safety and the optimal photovoltaic solar energy capture through the driving transmission mechanism, avoids the potential damage risk of environmental factors to the photovoltaic module, ensures that the photovoltaic solar panel is always in the ideal working condition of photovoltaic solar energy absorption, and further improves the overall power generation efficiency of the system.

[0051] As shown in Figure 5 , the nozzle 42 regularly cleans the photovoltaic solar panel 16, and the figure is a structural schematic view of the photovoltaic solar panel 16 of the photovoltaic solar power generation device in an inclined state with the horizontal plane. When the inclined state, it is more convenient to clean the photovoltaic solar panel 16, and the maintenance cost of the device is reduced.

[0052] As shown in Figure 6 , the figure is a structural schematic view of the photovoltaic solar power generation device in a state of rotating 180 degrees in the horizontal direction and the plane of the photovoltaic solar panel 16 being at the maximum angle of 90 degrees with the horizontal plane.

[0053] The fixed block 65 is fixed at the bottom of the photovoltaic solar panel 16, and the movement of the screw block 45 is driven by the screw rod 25, so that the plane of the photovoltaic solar panel 16 forms an angle of 0 to 90 degrees with the horizontal plane.

[0054] As shown in Figure 7As shown, the wave energy hydraulic power generation device includes a wave capture float 4, a connector 12, a piston rod 24, a hydraulic cylinder 10, a pipe 1, a check valve 5, an accumulator 6, a hydraulic motor 7, a motor support 14, a filter 3, a generator 21, an oil tank 9, and an offshore platform 11.

[0055] The wave energy hydraulic power generation device is configured such that one end of connector 12 is hinged to the middle of the wave capture float 4, and the other end is hinged to the top of the hydraulic cylinder 10; piston rod 24 cooperates with connector 12. Hydraulic motor 7 cooperates with generator 21, and the bottom of hydraulic motor 7 is fixed to the offshore platform 11 by motor support 14. Two accumulators 6 are installed on the pipe 1 between hydraulic motor 7 and hydraulic cylinder 10. Filter 3, oil tank 9, and hydraulic cylinder 10 are installed at the oil outlet of hydraulic motor 7. Check valves 5 are installed between hydraulic motor 7 and filter 3 on pipe 1 to prevent backflow of fluid. Two sets of symmetrical wave energy hydraulic power generation devices are installed on an integrated offshore platform 11, which improves the utilization rate of the wave energy hydraulic power generation device area and increases working efficiency.

[0056] like Figure 8 As shown, the accumulator 6 includes a housing 6-5, an air bladder 6-1, an oil inlet valve 6-6, a mushroom valve 6-9, a spring 6-10, an inflation assembly, and a sealing assembly.

[0057] The inflation assembly includes an inflation valve 6-2, an inflation valve cap 6-3, a protective cap 6-4, and a stop ring 6-15. The sealing assembly includes a rubber retainer ring 6-7, a retaining ring 6-14, a sealing ring 6-12, a retaining ring 6-14, and a screw 6-16.

[0058] The accumulator 6 is in operation, open the inflation valve cap 6-3, to the air bag 6-1 filled with rated pressure of inert gas, filled with air after the accumulator air bag 6-1 due to internal pressure natural resistance into the oil valve 6-6, form the initial sealing state. When the wave energy hydraulic power generation device runs, the pressure oil through the oil inlet valve 6-6 into the accumulator 6 at the same time, the oil pressure synchronously extrude the bacteria-shaped valve 6-9 and the spring 6-10, force the air bag 6-1 compressed deformation, at this time the air pressure in the air bag 6-1 with the volume decreases and rises, the process realizes the conversion and storage of oil energy to the gas potential energy in the air bag 6-1. When the wave energy input attenuation leads to the hydraulic circuit pressure decreases, the high pressure gas in the air bag 6-1 will be reverse expansion to push the liquid out of the shell 6-5. Accumulator 6 through the construction of "pressure-flow double parameter dynamic response" mechanism to achieve innovative optimization: when the system pressure attenuation, its built-in air bag 6-1 through the release of elastic potential energy actively push the oil, form the instantaneous high pressure energy, not only for the hydraulic motor 7 provides stable pressure source, more through the volumetric flow compensation to improve the continuity of the motor input flow; innovative use of double cavity energy buffer design, in the absorption of wave pulse generated by the excess hydraulic energy to form "energy temporary interval", when the system pressure low release, realize the time and space domain dynamic redistribution of hydraulic energy. This active energy regulation mode, the energy conversion efficiency of the hydraulic motor 7 is improved, fundamentally solves the problem of hydraulic circuit pressure instability caused by intermittent wave energy.

[0059] The accumulator 6 is composed of gas components and liquid components. The gas components are the inflation valve 6-2 installed on the upper part of the shell 6-5, the air bag 6-1 connected with the inflation valve 6-2, the inflation valve cap 6-3 and the protection cap 6-4 installed in sequence at the inlet of the inflation valve 6-2 to prevent gas leakage, and the inflation valve 6-2 fixed on the upper part of the shell 6-5 by the stop ring 6-15.

[0060] The liquid components are the oil inlet valve 6-6 installed on the lower part of the shell 6-5, the bacteria-shaped valve 6-9 and the spring 6-10 in the middle of the oil inlet valve 6-6 for compressing the air bag 6-1 when hydraulic oil enters. In order to prevent hydraulic oil leakage, the rubber retainer ring 6-7, the sealing ring 6-12 and the snap ring 6-14 are installed between the oil inlet valve 6-6 and the shell 6-5. The oil inlet valve 6-6 is clamped by the snap ring 6-14, the accumulator 6 cooperates with the pipeline 1, and is fixed on the pipeline 1 by the screw 6-16.

[0061] As shown in Figure 9 The filter 3 includes a filter cavity 3-1, a filter plate 3-4, a filter plate supply cabin 3-3, a waste filter plate collection cabin 3-2, a compression spring 3-5, a spring seat plate 3-6, a push rod 3-7, a filter plate replacement motor 3-8, a tensioning roller 3-9, a tensioning rope 3-10, a differential pressure sensor 3-11, a control board 3-12 and a pre-tightening spring 3-13.

[0062] The filter plate supply cabin has a top filter plate, a middle filter plate and a bottom filter plate, the top filter plate is provided with pre-tightening springs 3-13 above, the bottom of the filter plate supply cabin 3-3 is provided with an opening, and the push rod 3-7 is pushed to the bottom filter plate to the waste filter plate collection cabin 3-2 through the opening under the action of the filter plate replacement motor 3-8, the tensioning roller 3-9 and the compression spring 3-5.

[0063] The working method of the offshore aquaculture platform for photovoltaic solar energy, wind energy and wave hydraulic power generation comprises the following steps:

[0064] 1) The wave drives the wave-capturing float 4 to oscillate up and down, thereby driving the connector 12 hinged above the hydraulic cylinder 10 to move, converting irregular wave energy into ordered mechanical motion, and further driving the piston rod 24 connected with the connector 12 to complete high-frequency linear reciprocating motion, thereby periodically compressing the hydraulic oil in the hydraulic cylinder 10 to increase the pressure. A part of the hydraulic oil in the hydraulic cylinder 10 directly inputs the hydraulic motor 7 through the pipeline 1 to drive work due to pressure energy, and another part of the hydraulic oil flows into the accumulator 6 for energy storage. When the wave energy input decays and the hydraulic circuit pressure decreases, the accumulator 6 triggers the active release of pressure oil to the hydraulic motor 7 through a preset pressure gradient, forms a cooperative energy supplement with the main oil circuit, and constructs a composite energy output mode of "immediate work + dynamic energy storage". The outlet of the hydraulic motor 7 flows out of the hydraulic oil, which is cleaned and filtered by the filter 3, and then flows back to the oil tank 9 through the pipeline 1, forming a low-loss hydraulic circulation loop. Finally, the hydraulic motor 7 drives the generator 21 through the speed increasing gear box to realize stable power generation. The entire system innovatively integrates wave energy capture, dynamic energy regulation and intelligent purification functions, and the energy conversion efficiency is improved compared with traditional devices.

[0065] 2) In the normal filtering stage, the oil flowing out of the oil outlet of the hydraulic motor 7 enters the filtering cavity 3-1, and after being filtered by the filter plate 3-4, it flows back to the oil tank 9. At this time, the filter plate 3-4 is unobstructed, and the system pressure difference is low. When the filter plate 3-4 is gradually blocked due to the interception of impurities, the inlet pressure difference of the filtering cavity 3-1 increases, and the pressure difference sensor 3-11 monitors this change in real time. When the pressure difference exceeds the set threshold, a signal is immediately sent to the control board 3-12; after the control board 3-12 receives the signal, the filter plate replacement motor 3-8 is started to rotate in the forward direction; the motor drives the tensioning roller 3-9 to rotate to retract the tensioning rope 3-10, thereby pulling the spring seat plate 3-6 to move and compress the compression spring 3-5; the push rod 3-7 linked with the spring seat plate 3-6 moves accordingly. The thickness of the push rod 3-7, the inlet of the filter paper supply cabin 3-3, and the filter plate 3-4 is the same, the pre-tightening spring 3-13 in the filter paper supply cabin 3-3 is in a compressed state, and the pre-tightening spring 3-13 extrudes the bottom filter plate to the inlet of the filter paper supply cabin 3-3. The movement of the push rod 3-7 pushes a clean filter plate in the filter paper supply cabin 3-3 out and covers the filtering area, while the old filter plate that has been blocked is pushed into the waste filter plate collection cabin 3-2. After the filter replacement is completed, the oil line pressure difference returns to normal, and the control board 3-12 controls the filter plate replacement motor 3-8 to reverse, releasing the tensioning rope 3-10, the compressed compression spring 3-5 extending, pushing the spring seat plate 3-6 and the push rod 3-7 to reset. After the reset is completed, the pre-tightening spring 3-13 inside the filter paper supply cabin 3-3 extends by a distance equal to the thickness of the filter plate and pushes the remaining clean filter plate 3-4 to the inlet of the filter paper supply cabin 3-3, preparing for the next filter replacement action.

[0066] 3) The sensor of the photovoltaic solar power generation device transmits the signal of the energy size to the angle adjusting assembly, and adjusts the optimal angle of the photovoltaic solar panel.

Claims

1. A marine aquaculture platform that generates photovoltaic solar energy, wind power, and wave hydraulic power, characterized in that: The application relates to a wave energy hydraulic power generation device, a wind turbine, a fish cage and a sea platform. The wave energy hydraulic power generation device comprises a wave capturing float (4), a hydraulic cylinder (10), an accumulator (6), a hydraulic motor (7) and a generator (21); one end of the hydraulic cylinder (10) is connected with a piston rod (24); a connector (12) is hinged between the wave capturing float (4) and the piston rod (24); a check valve (5), a filter (3) and an oil tank (9) are arranged at the oil outlet of the hydraulic motor (7); a speed increasing gear box is connected between the hydraulic motor (7) and the generator (21). The accumulator (6) comprises a shell (6-5), an inflation assembly and an air bag (6-1); an oil inlet valve (6-6) is arranged below the shell (6-5); a bacteria-shaped valve (6-9), a spring (6-10) and a sealing assembly are arranged between the oil inlet valve (6-6) and the air bag (6-1); the spring (6-10) is sleeved on the bacteria-shaped valve (6-9). The filter (3) comprises a filtering cavity (3-1), a filter plate supply cabin (3-3), a waste filter plate collection cabin (3-2), a spring seat plate (3-6), a filter plate replacement motor (3-8) and a control plate (3-12); the filter plate supply cabin (3-3) is internally provided with a top filter plate, a middle filter plate and a bottom filter plate; the top filter plate is provided with a pre-tightening spring (3-13) above; the filtering cavity (3-1) is internally provided with a differential pressure sensor (3-11) in communication with the control plate (3-12); the filter plate replacement motor (3-8) is connected with a tensioning roller (3-9); the tensioning roller (3-9) is provided with a tensioning rope (3-10) between the tensioning roller (3-9) and the spring seat plate (3-6); a spring (3-5) is connected between the filtering cavity (3-1) and the spring seat plate (3-6); a push rod (3-7) is connected between the spring seat plate (3-6) and the filter plate supply cabin (3-3); the filter plate supply cabin (3-3) is provided with an opening at the bottom; the push rod (3-7) pushes the bottom filter plate to the waste filter plate collection cabin (3-2) through the opening under the actions of the filter plate replacement motor (3-8), the tensioning roller (3-9) and the spring (3-5).

2. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The wave energy hydraulic power generation device comprises a wave capturing float (4), a hydraulic cylinder (10), an accumulator (6), a hydraulic motor (7) and a generator (21); one end of the hydraulic cylinder (10) is connected with a piston rod (24); a connector (12) is hinged between the wave capturing float (4) and the piston rod (24); a check valve (5), a filter (3) and an oil tank (9) are arranged at the oil outlet of the hydraulic motor (7); a speed increasing gear box is connected between the hydraulic motor (7) and the generator (21).

3. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 2, characterized in that: The accumulator (6) comprises a shell (6-5), an inflation assembly and an air bag (6-1); an oil inlet valve (6-6) is arranged below the shell (6-5); a bacteria-shaped valve (6-9), a spring (6-10) and a sealing assembly are arranged between the oil inlet valve (6-6) and the air bag (6-1); the spring (6-10) is sleeved on the bacteria-shaped valve (6-9). The angle adjusting assembly comprises a sensor (50), a second motor (58), a lead screw (25) arranged on the photovoltaic rotating platform (52) and a fixing block (65) arranged at the bottom of the photovoltaic solar panel (16); the lead screw (25) is provided with a lead screw sliding block (45); the fixing block (65) and the lead screw sliding block (45) are provided with a connecting rod (29).

4. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 2, characterized in that: A pin shaft (60) is connected between the photovoltaic solar panel (16) and the photovoltaic rotating platform (52).

5. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 2, characterized in that: The photovoltaic solar panel (16) is provided with a spray head (42).

6. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The inflating assembly comprises an inflating valve (6-2), an inflating valve cap (6-3), a protective cap (6-4) and a stop ring (6-15); the inflating valve (6-2) is installed on the upper part of a shell (6-5), the air bag (6-1) is connected with the inflating valve (6-2); the inflating valve (6-2) is fixed on the upper part of the shell (6-5) by the stop ring (6-15).

7. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The sealing assembly comprises a rubber supporting ring (6-7), a check ring (6-14), a sealing ring (6-12), a snap ring (6-14) and a screw (6-16); the rubber supporting ring (6-7), the check ring (6-14), the sealing ring (6-12) and the snap ring (6-14) are located between the oil inlet valve (6-6) and the snap ring (6-14).

8. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The wind turbine generator comprises horizontal axis wind turbine (18) and vertical axis wind turbine (13).

9. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The culture net cage (33) is connected with a support, and the culture net cage is fixed below the offshore platform through the support.

10. The photovoltaic solar, wind and wave hydraulic power generating offshore farming platform according to claim 1, characterized in that: The wave energy hydraulic power generation device is symmetrically installed on the offshore platform (11). A pin shaft (60) is connected between the photovoltaic solar panel (16) and the photovoltaic rotating platform (52).

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