Wave energy power generation method

Abstract

The invention relates to the technical field of wave power generation, in particular to a wave power generation method which is realized based on a floater and a water storage tank. A diaphragm pump is arranged in the floater and comprises a top plate, a bottom plate and a flexible wall body capable of generating deformation, the top plate, the bottom plate and the flexible wall body jointly define a cavity, a water inlet pipe and a water outlet pipe which are provided with one-way valves are arranged on the top plate, and the bottom plate is connected with a damping disc through a connecting piece; a water storage cavity, a water-turbine generator set located on the lower portion of the water storage cavity and an energy storage battery connected with the water-turbine generator set are arranged in the water storage tank. The water storage cavity communicates with the water outlet pipe; the floater moves up and down along with waves to drive the flexible wall body to deform and drive the volume of the cavity of the diaphragm pump to change, seawater is sucked into the cavity of the diaphragm pump or the seawater in the cavity is pumped into the water storage cavity, the water-turbine generator set is driven to generate electricity, and electric energy is stored in the energy storage battery. Through the power generation method, the problems of high cost and short service life can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of wave energy power generation, and in particular to a wave energy power generation method. Background Art

[0002] The ocean covers a large part of the Earth's surface, providing a vast energy potential. Whether it is tidal energy, wave energy, temperature gradient energy, salinity gradient energy or ocean current energy, they all represent an almost endless supply of energy. Wave energy is generated by the rising and falling motion of ocean waves. This energy uses the wave power generated by wind acting on the sea surface.

[0003] In the prior art, it has been proposed to generate electricity using wave energy. For example, the Chinese invention patent document with publication number CN106979119A and publication date April 25, 2017, discloses the following technical solution: an offshore dam type wave energy power generation device and a wave energy power generation method, the power generation device comprises: a high-level water storage device, a hydroelectric generator set, a piston pump, a lever, a slewing fulcrum, a power take-off buoy and a fixed platform; the power take-off buoy is arranged on the sea surface; the lever has a slewing fulcrum, one end of the lever is fixedly connected to the power take-off buoy, and the other end of the lever is fixedly connected to the piston through a piston rod.

[0004] The above technical solution may cause the following problems during actual use: (1) The power take-off buoy drives the piston to reciprocate up and down through a lever. The lever and piston are prone to wear and tear, and the piston has high requirements. It must prevent water leakage and be able to slide freely to prevent jamming. The entire power generation device is prone to instability and has a short service life.

[0005] (2) The turbine generator set and high-level water storage equipment are separately installed and installed on a fixed platform. The fixed platform needs to be fixed on the sea surface. The high-level water storage equipment is in the form of a water storage tower or a water storage dam. The cost of design, construction, deployment and maintenance is relatively high and is likely to have an impact on the marine environment. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a wave energy power generation method, which can effectively solve the problems of high cost and short service life.

[0007] The present invention is achieved by adopting the following technical solutions: A wave energy power generation method is realized based on a float and a water storage tank arranged on the sea surface; a diaphragm pump is arranged in the float, and the diaphragm pump comprises a top plate, a bottom plate and a flexible wall body that can generate deformation, the top plate, the bottom plate and the flexible wall body are enclosed together to form a cavity, a water inlet pipe and a water outlet pipe that are connected to the cavity and are respectively provided with a one-way valve are arranged on the top plate, and the bottom plate is connected to a damping disk for slowing down the movement trend of the bottom plate through a connecting piece; a water storage cavity, a hydro-turbine generator set located at the lower part of the water storage cavity and an energy storage battery connected to the hydro-turbine generator set are arranged in the water storage tank; the water storage cavity is connected to the water outlet pipe; the float moves up and down with the waves, so that the relative position of the top plate and the bottom plate of the diaphragm pump changes, the flexible wall body is driven to deform, the cavity volume of the diaphragm pump changes, seawater is sucked into the cavity of the diaphragm pump or the seawater in the cavity is pumped out into the water storage cavity, the hydro-turbine generator set is driven to generate electricity, and the electric energy is stored in the energy storage battery.

[0008] The floats and water storage tanks are arranged in groups, and each group includes a water storage tank and a plurality of floats respectively located around the water storage tank.

[0009] It also includes a connected controller, a liquid level detector and a control valve; the liquid level detector is arranged in a water storage chamber; the water storage tank also includes a hydro-generator set placement chamber, and the water storage chamber and the hydro-generator set placement chamber are connected through a pipeline with a control valve; the controller sends a corresponding control signal to the control valve according to the liquid level height in the water storage chamber detected by the liquid level detector.

[0010] The water storage tank also includes an isolation chamber, and the controller and the energy storage battery are both arranged in the isolation chamber.

[0011] The flexible wall is a cylindrical diaphragm, and the diaphragm is formed by a plurality of folds connected in series.

[0012] The connecting piece is a connecting rod, and the float is also provided with a bearing matching the connecting rod.

[0013] The water storage tank and the damping plate are respectively arranged on the fixing frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention utilizes the deformation of the flexible wall to collect wave energy. Compared with the conventional technical solution using a piston pump, the cost is lower. At the same time, the diaphragm pump does not have relative sliding between piston components, and there will be no problems such as jamming or wear. The rubber material is hydrophobic, which can alleviate the impact of marine organisms or debris on components, thereby increasing the service life.

[0015] Furthermore, in the present invention, the water storage chamber and the turbine generator set are both arranged in the water storage tank, and the water storage tank adopts a floating structure, and does not need to set up an additional marine platform, which can greatly reduce the cost, and the scope of use is not limited by the depth of seawater. Furthermore, through the structural design and size parameter design of the water storage tank, the center of gravity of the water storage tank can be made more stable, less affected by the ups and downs of waves, and can remain stable during the ups and downs of waves.

[0016] 2. The design of the damping disk can slow down the movement of the bottom plate. When the wave energy drives the float to move, the top plate reciprocates relative to the bottom plate, and the flexible wall moves back and forth and deforms, so that seawater can be sucked into the cavity of the diaphragm pump or pumped out into the water storage cavity. The seawater collected in the water storage cavity can drive the hydro-generator set to generate electricity, and store the electricity in the energy storage battery for subsequent use. Due to its simple and reliable float structure, this power generation device has higher reliability than conventional float wave energy power generation devices.

[0017] 3. The float and the water tank float on the water surface. According to functional requirements, a GPS positioning device and a power source required for navigation can be designed so that the float and the water tank can be moved as needed.

[0018] 4. The floats and water tanks are arranged in groups, each group includes a water tank and a number of floats located around the water tank. Through a one-to-many structural design, combined with the setting of a large-flow diaphragm pump, the amount of seawater collected in the water tank can be guaranteed, the unstable power generation caused by the instability of wave energy can be alleviated, the stable power output can be guaranteed, and the quality of power can be improved.

[0019] 5. In the present invention, by setting up the controller, the liquid level detector and the control valve, selective power generation can be performed according to demand or the amount of seawater in the water storage chamber, thereby improving the controllability of power generation.

[0020] 6. The controller and energy storage battery are both placed in the isolation chamber to ensure the safety of the use process.

[0021] 7. The flexible wall is a cylindrical diaphragm, which is composed of a number of folds connected in series. Compared with conventional thin-sheet membrane pumps, it can meet large flow requirements and has a simple structure and is easy to manufacture.

[0022] 8. The cooperation between the bearing and the connecting rod makes the movement direction of the float more controllable, making it easier to fully utilize the wave energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, wherein: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of the float in the present invention; Markings in the figure: 1. Float, 2. Water storage tank, 3. Hydro-generator set, 4. Fixed frame, 5. Diaphragm pump, 6. Water inlet pipe, 7. Water outlet pipe, 8. Water inlet check valve, 9. Water outlet check valve, 10. Cavity, 11. Top plate, 12. Flexible diaphragm, 13. Bottom plate, 14. Connecting rod, 15. Flexible connecting rope, 16. Damping disc, 18. Bearing, 19. Energy storage battery. DETAILED DESCRIPTION

[0024] Example 1

[0025] As a basic embodiment of the present invention, the present invention includes a wave energy power generation method, which is implemented based on a float 1 and a water storage tank 2 arranged on the sea surface. In this embodiment, the shape of the float 1 is not limited, as long as it can float up during the wave crest section and fall during the wave trough section. The wave energy collection efficiency can be improved by the shape design of the float 1, but no matter which shape is adopted, it should be within the scope of protection of this patent.

[0026] The float 1 is provided with a diaphragm pump 5, which includes a top plate 11, a bottom plate 13 and a flexible wall body that can be deformed. The top plate 11, the bottom plate 13 and the flexible wall body together enclose a cavity 10. The top plate 11 is provided with an inlet pipe 6 and an outlet pipe 7 that are connected to the cavity 10. The outlet pipe 7 and the inlet pipe 6 are respectively provided with a one-way valve, and the outlet pipe 7 and the inlet pipe 6 are respectively connected to the float 1 and extend outward from the float 1. The bottom plate 13 is connected to a damping plate used to slow down the movement trend of the bottom plate 13 through a connector.

[0027] The water storage tank 2 is provided with a water storage chamber, a hydro-generator set 3 and an energy storage battery 19. The hydro-generator set 3 can be arranged in the water storage chamber, and arranged in the lower part of the water storage chamber. The energy storage battery 19 can be independently arranged in one of the chambers of the water storage tank 2, and connected to the hydro-generator set 3 through a cable. When the cable passes through the chamber and is connected to the hydro-generator set 3, a seal can be arranged between the cable and the chamber.

[0028] The water storage chamber is connected to the water outlet pipe 7. The float 1 moves up and down with the waves, driving the top plate 11 to move up and down, further driving the flexible wall to deform, and the volume of the cavity 10 of the diaphragm pump 5 changes, sucking seawater into the cavity 10 of the diaphragm pump 5 or pumping the seawater in the cavity 10 into the water storage chamber. The seawater pumped into the water storage chamber flows downward, driving the turbine generator set 3 located below to generate electricity, and storing the electrical energy in the energy storage battery 19.

[0029] Example 2

[0030] As a preferred embodiment of the present invention, the present invention includes a wave energy power generation method, which is implemented based on a float 1 and a water storage tank 2 fixed on a power-using facility or other power generation facility. The power-using facility includes but is not limited to an offshore drilling platform, a floating fishery cage, etc., which can be powered by the present invention. The other power generation facilities include but are not limited to offshore wind power, etc., which can use their transmission lines to transmit the power generated by the device of the present invention to reduce the transmission cost.

[0031] The float 1 is provided with a diaphragm pump 5, which includes a top plate 11, a bottom plate 13 and a flexible wall body that can be deformed. The top plate 11, the bottom plate 13 and the flexible wall body together enclose a cavity 10. The top plate 11 is provided with an inlet pipe 6 and an outlet pipe 7 that are connected to the cavity 10. The outlet pipe 7 and the inlet pipe 6 are respectively provided with a one-way valve, and the outlet pipe 7 and the inlet pipe 6 are respectively connected to the float 1 and extend outward from the float 1. The bottom plate 13 is connected to a damping plate used to slow down the movement trend of the bottom plate 13 through a connector.

[0032] The water storage tank 2 is provided with a water storage chamber and a hydro-generator set 3 located at the lower part of the water storage chamber. The power generated by the hydro-generator set 3 can be used by power facilities through lead wires or connected to power transmission lines of other power generation equipment.

[0033] Example 3

[0034] As another embodiment of the present invention, the present invention includes a wave energy power generation method, which is implemented based on a float 1 and a water storage tank 2 arranged on the sea surface. A diaphragm pump 5 is arranged in the float 1, and the diaphragm pump 5 includes a top plate 11, a bottom plate 13 and a flexible wall body that can be deformed. The flexible wall body that can be deformed can be made of an elastic material. The top plate 11, the bottom plate 13 and the flexible wall body are together enclosed to form a cavity 10, and the top plate 11 is provided with an inlet pipe 6 and an outlet pipe 7 that are connected to the cavity 10 and are respectively provided with a one-way valve, and the bottom plate 13 is connected to a damping disk 16 for slowing down the movement trend of the bottom plate 13 through a connecting piece.

[0035] The water storage tank 2 is provided with a water storage chamber, a hydro-generator set 3 located below the water storage chamber, and an energy storage battery 19 connected to the hydro-generator set 3. A water outlet channel is provided at the bottom of the water storage chamber toward the hydro-generator set 3. From top to bottom, the water outlet channel may be in a reduced diameter shape, so as to increase the flow rate of seawater in the water storage chamber.

[0036] The water storage chamber is connected to the water outlet pipe 7. The float 1 moves up and down with the waves, causing the flexible wall to deform, and the volume of the cavity 10 of the diaphragm pump 5 changes, so that seawater is sucked into the cavity 10 of the diaphragm pump 5 or the seawater in the cavity 10 is pumped out to the water storage chamber, driving the hydro-generator set 3 to generate electricity, and storing the electric energy in the energy storage battery 19.

[0037] Example 4

[0038] As another preferred embodiment of the present invention, the present invention includes a wave energy power generation method, which is implemented based on a float 1 and a water storage tank 2 arranged on the sea surface. A diaphragm pump 5 is arranged in the float 1, and the diaphragm pump 5 includes a top plate 11, a bottom plate 13 and a flexible wall body that can generate deformation. The top plate 11, the bottom plate 13 and the flexible wall body together enclose a cavity 10. The top plate 11 is provided with an inlet pipe 6 and an outlet pipe 7 connected to the cavity 10, and the outlet pipe 7 and the inlet pipe 6 are respectively provided with a one-way valve, and the outlet pipe 7 and the inlet pipe 6 extend outward from the float 1 respectively. The bottom plate 13 is connected to a damping disc 16 for slowing down the movement trend of the bottom plate 13 through a connector.

[0039] The water storage tank 2 is provided with a water storage chamber, a hydro-generator set placement chamber and an isolation chamber. The hydro-generator set placement chamber can be located at the lower part of the water storage chamber, and the water storage chamber and the hydro-generator set placement chamber can be connected through a pipeline with a control valve. The hydro-generator set 3 is placed in the hydro-generator set placement chamber. The upper end of the hydro-generator set placement chamber, i.e., the end connected to the pipeline, is in a reduced diameter shape toward the hydro-generator set 3, so as to increase the flow rate of seawater entering the hydro-generator set 3.

[0040] Furthermore, an energy storage battery 19 and a controller are also provided in the isolation chamber. A liquid level detector is also provided in the water storage chamber. The controller is connected to the liquid level detector and the control valve, and is used to send a corresponding control signal to the control valve according to the liquid level height in the water storage chamber detected by the liquid level detector. The energy storage battery 19 is connected to the hydro-generator set 3, and is used to store the electric energy generated by the hydro-generator set 3. The stored electric energy can be used to charge military or civilian submersibles.

[0041] Example 5

[0042] As the best embodiment of the present invention, the present invention includes a wave energy power generation method, which is realized based on a fixed frame 4 and a float 1 and a water storage tank 2 located on the fixed frame 4. The fixed frame 4 can float in the water or be connected to the seabed by a connecting rope. Figure 1 And the instruction manual Figure 2 The float 1 and the water tank 2 are arranged in groups, each group includes a water tank 2 and a plurality of floats 1 respectively located around the water tank 2. The float 1 can be in a shape of being larger at the top and smaller at the bottom, so as to improve the efficiency of the float 1 in collecting wave energy.

[0043] A diaphragm pump 5 is arranged in each float 1. The diaphragm pump 5 comprises a top plate 11, a bottom plate 13, a water inlet pipe 6, a water outlet pipe 7 and a flexible wall body that can generate deformation. The flexible wall body is a cylindrical diaphragm. The top plate 11 and the bottom plate 13 are parallel to each other, and the cylindrical diaphragm is located between the top plate 11 and the bottom plate 13. The top plate 11, the bottom plate 13 and the diaphragm together enclose a cavity 10. The diaphragm is formed by a plurality of folds connected in series, and the folds are parallel to the bottom plate 13.

[0044] One end of the water outlet pipe 7 and the water inlet pipe 6 are respectively arranged on the top plate 11 and communicated with the cavity 10. The other end extends outward from the float 1. Furthermore, the water inlet of the water inlet pipe 6 is downward, that is, toward the seabed. The water outlet of the water outlet pipe 7 can be directly connected to the water storage tank 2 or connected to the water storage tank 2 through a pipeline. Among them, the water outlet pipe 7 is provided with a water outlet check valve 9, and the water inlet pipe 6 is provided with a water inlet check valve 8.

[0045] The bottom plate 13 is connected to a damping disc 16 through a connecting member, which may be a connecting rod 14. The damping disc 16 is used to slow down the movement of the bottom plate 13. The damping disc is connected to the fixing frame 4 through a flexible connecting rope 15. Furthermore, the float 1 is also provided with a bearing 18 matching the connecting rod 14, and a special structure is used to seal the bearing 18. Specifically, a diaphragm may be provided outside the connecting rod 14 and the bearing 18 to isolate them from seawater.

[0046] The bottom of the water storage tank 2 is connected to the fixing frame 4. The water storage tank 2 is provided with a water storage chamber, a water turbine generator set placement chamber and an isolation chamber. The water turbine generator set placement chamber can be located at the lower part of the water storage chamber, and the isolation chamber is located around the water turbine generator set placement chamber. The water storage chamber and the water turbine generator set placement chamber can be connected or disconnected by a control valve. The water turbine generator set 3 is placed in the water turbine generator set placement chamber.

[0047] Furthermore, an energy storage battery 19 and a controller are also provided in the isolation chamber. A liquid level detector is also provided in the water storage chamber. The controller can be connected to the liquid level detector and the control valve respectively by cables or by wireless communication, and is used to send a corresponding control signal to the control valve according to the liquid level height in the water storage chamber detected by the liquid level detector. Specifically, when the liquid level in the water storage chamber reaches the corresponding requirement, the control valve will open, so that the water storage chamber is connected to the placement chamber of the hydro-generator set to achieve power generation. The energy storage battery 19 can be connected to the hydro-generator set 3 by cables, and is used to store the electric energy generated by the hydro-generator set 3. The stored electric energy can be used to charge military or civilian submersibles. Among them, when each cable passes through the isolation chamber, a seal can be provided between the cable and the isolation chamber to achieve sealing. A detachable cover is also provided on the water storage tank 2 corresponding to the position of the isolation chamber, and the isolation chamber is connected or closed with the outside through the detachable cover. A seal is also provided between the detachable cover and the water storage tank 2 to ensure the safety of each component in the isolation chamber when in use.

[0048] Furthermore, the float and the water tank can float on the water surface. According to functional requirements, a GPS positioning device and a power source required for navigation can be designed so that the float and the water tank can be moved as needed.

[0049] When the wave transitions from the trough to the crest, the float 1 floats up, driving the water inlet pipe 6, the water outlet pipe 7 and the top plate 11 to move upward, the flexible wall stretches, the volume of the cavity 10 increases, and the seawater is sucked into the cavity 10. When the wave transitions from the crest to the trough, the float 1 falls, driving the water inlet pipe 6, the water outlet pipe 7 and the top plate 11 to move downward, the flexible wall compresses downward, the volume of the cavity 10 decreases, and the seawater in the cavity 10 is pumped into the water storage cavity of the water tank 2 of the power generation device. When the liquid level in the water storage cavity reaches the requirement, the control valve opens, and the seawater collected in the water storage cavity moves downward, enters the hydro-turbine generator set placement cavity, and impacts the hydro-turbine generator set 3, and the hydro-turbine generator set 3 generates electricity and is stored in the energy storage battery 19 next to it. The stored electrical energy can be used to charge military or civilian submersibles, etc.

[0050] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental labor, which all fall within the scope of protection of the present invention.

Claims

1. A wave energy power generation method, characterized in that: The method is realized based on a float (1) and a water storage tank (2) arranged on the sea surface; a diaphragm pump (5) is arranged in the float (1), and the diaphragm pump (5) comprises a top plate (11), a bottom plate (13) and a flexible wall body capable of generating deformation; the top plate (11), the bottom plate (13) and the flexible wall body together enclose a cavity (10); a water inlet pipe (6) and a water outlet pipe (7) which are in communication with the cavity (10) and are respectively provided with a one-way valve are arranged on the top plate (11); the bottom plate (13) is connected to a damping disc (16) for slowing down the movement trend of the bottom plate (13) through a connecting piece; the water storage tank (2) has a plurality of diaphragm pumps (5) arranged in the diaphragm pump (5); and the diaphragm pump (5) comprises a top plate (11), a bottom plate (13) and a flexible wall body capable of generating deformation. The top plate (11), the bottom plate (13) and the flexible wall body together enclose a cavity (10); a water inlet pipe (6) and a water outlet pipe (7) which are in communication with the cavity (10) and are respectively provided with a one-way valve are arranged on the top plate (11); the bottom plate (13) is connected to a damping disc (16) for slowing down the movement trend of the bottom plate (13) through a connecting piece; A water storage chamber, a hydro-turbine generator set (3) located below the water storage chamber, and an energy storage battery (19) connected to the hydro-turbine generator set (3) are provided; the water storage chamber is connected to a water outlet pipe (7); the float (1) moves up and down with the waves, causing the relative position of the top plate (11) and the bottom plate (13) of the diaphragm pump (5) to change, driving the flexible wall to deform, causing the volume of the cavity (10) of the diaphragm pump (5) to change, and sucking seawater into the cavity (10) of the diaphragm pump (5) or pumping seawater in the cavity (10) out to the water storage chamber, driving the hydro-turbine generator set (3) to generate electricity, and storing the electrical energy in the energy storage battery (19).

2. A wave energy power generation method according to claim 1, characterized in that: The floats (1) and the water storage tanks (2) are arranged in groups, and each group comprises a water storage tank (2) and a plurality of floats (1) respectively located around the water storage tank (2).

3. A wave energy power generation method according to claim 1 or 2, characterized in that: It also includes a connected controller, a liquid level detector and a control valve; the liquid level detector is arranged in the water storage chamber; the water storage tank (2) also includes a water turbine generator set placement chamber, the water storage chamber and the water turbine generator set placement chamber are connected through a pipeline with a control valve; the controller sends a corresponding control signal to the control valve according to the liquid level height in the water storage chamber detected by the liquid level detector.

4. A wave energy power generation method according to claim 3, characterized in that: The water storage tank (2) further comprises an isolation chamber, and the controller and the energy storage battery (19) are both arranged in the isolation chamber.

5. A wave energy power generation method according to claim 1, characterized in that: The flexible wall is a cylindrical diaphragm, and the diaphragm is formed by a plurality of folds connected in series.

6. A wave energy power generation method according to claim 1, characterized in that: The connecting piece is a connecting rod (14), and the float (1) is also provided with a bearing (18) matching the connecting rod (14).

7. A wave energy power generation method according to claim 1, characterized in that: The water storage tank (2) and the damping plate (16) are respectively arranged on the fixing frame (4).

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