Buoy using wave energy for pumping liquid, and use thereof

Abstract

A buoy using wave energy for pumping liquid, and the use thereof. The buoy comprises a buoy body (100); a diaphragm pump (200) is provided in an internal cavity of the buoy body (100); the diaphragm pump (200) comprises a pump cavity (1) having a variable volume, the pump cavity (1) being enclosed by a diaphragm side wall (2) capable of elastic deformation, and a top plate (3) and a bottom plate (8) which are located at two ends of the diaphragm side wall (2); the top plate (3) is connected to the buoy body (100), and the bottom plate (8) is connected to a damping structure; the top plate (3) is provided with a suction valve (4) and a discharge valve (5); the buoy body (100) is provided with a water suction opening matching the suction valve (4) and a water discharge opening matching the discharge valve (5); the buoy body (100) moves with undulation of waves to drive the top plate (3) to move relative to the bottom plate (8), so as to cause the diaphragm side wall (2) to undergo elastic deformation and change the volume of the pump cavity (1), thereby pumping liquid into the pump cavity (1) or discharging liquid from the pump cavity (1).

Description

A float that uses wave energy to pump liquid and its application Technical Field

[0001] This invention relates to the field of wave energy power generation equipment technology, and more specifically to a float that utilizes wave energy to pump liquid and its application. Background Technology

[0002] Ocean energy is energy extracted from the ocean, including various forms such as tides, waves, temperature differences, salinity differences, and ocean currents. It is a renewable energy source with advantages such as low environmental impact and high sustainability. The development and utilization of ocean energy provides a new approach to optimizing the global energy structure and protecting the environment.

[0003] Because the ocean covers most of the Earth's surface, ocean energy has enormous development potential. It can serve as an alternative to traditional fossil fuels, helping to reduce greenhouse gas emissions and combat global climate change. The utilization of ocean energy has driven the development of related technologies, including ocean power generation technology and energy conversion equipment.

[0004] Wave energy is generated through the rising and falling motion of ocean waves. This energy utilizes the wave dynamics created by wind acting on the sea surface. Wave energy capture technologies include oscillating water column technology, which uses air as a carrier to capture wave energy; oscillating buoy technology, which uses the motion of floating bodies to capture wave energy; and wave-crossing technology, which uses the potential energy of seawater to capture wave energy. Converting the captured wave energy is the key technology for utilizing wave energy, and different types of PTOs (Power Take-Off Devices) must be used to convert different forms of primary captured energy. Typically, wave energy undergoes three stages of conversion: the first stage is the receiving body, which absorbs the wave energy dispersed on the sea surface; the second stage is the intermediate conversion device; and the third stage is the actual utilization of the energy.

[0005] Currently, wave energy is mainly used for power generation, and existing secondary conversion devices mainly include three energy transfer methods: pneumatic, hydraulic, and mechanical. Among them, hydraulic wave energy utilization devices are receiving increasing attention. This technology uses a floating body to capture wave energy, converts the wave energy into hydraulic energy through a hydraulic device connected to the floating body, and then converts it into electrical energy through a generator.

[0006] The existing float structure has a relatively complex integration with the PTO system, with many structural components, which has a significant impact on the overall lifespan of the float and makes subsequent inspection and maintenance more difficult. Summary of the Invention

[0007] To address the problems and shortcomings of the existing technology, this invention proposes a float that utilizes wave energy to pump liquid. The float has a simple overall structure and is relatively easy to connect to the PTO system, significantly reducing the corresponding inspection and maintenance. Compared with the original float, it effectively improves the efficiency of the overall device.

[0008] To achieve the above-mentioned objectives, the technical solution of the present invention is as follows:

[0009] This invention discloses a float that utilizes wave energy to pump liquid. The float includes a float body, which is a hollow, sealed shell. A reciprocating pump is installed in the internal cavity of the float body. The reciprocating pump is a diaphragm pump. The diaphragm pump includes a pump chamber with variable volume. The pump chamber is formed by a diaphragm sidewall capable of elastic deformation, a top plate located at the upper end of the diaphragm sidewall, and a bottom plate located at the lower end. The top plate and the bottom plate can move relative to each other. The top plate of the diaphragm pump is connected to the float body, and the bottom plate is fixedly connected to a damping structure located outside the float body to provide resistance and prevent the bottom plate from moving.

[0010] When the float rises with the waves, the top plate of the diaphragm pump moves together with the float, while the bottom plate remains stationary due to the damping structure. This relative motion between the top and bottom plates causes elastic deformation of the diaphragm sidewalls, increasing the volume of the pump chamber and drawing seawater into it. When the float sinks with the waves, the top plate sinks along with it, moving downwards towards the bottom plate and compressing the pump chamber. This reduces the volume of the pump chamber, pumping seawater out and thus achieving liquid pumping.

[0011] Furthermore, the top plate is equipped with an intake valve and a discharge valve, and the float body is equipped with a water inlet matching the intake valve and a water outlet matching the discharge valve. When the float body rises with the waves, the top plate of the diaphragm pump moves together with the float body, while the bottom plate remains stationary under the action of the damping structure. Relative motion occurs between the top and bottom plates, causing elastic deformation of the diaphragm sidewalls and increasing the volume of the pump chamber. This allows seawater to be drawn into the pump chamber of the diaphragm pump through the water inlet and the intake valve. When the float body sinks with the waves, the top plate moves downwards towards the bottom plate. The relative motion between the top and bottom plates compresses the pump chamber, reducing its volume. This allows the seawater in the pump chamber to be pumped out through the discharge valve and the water outlet, thus achieving liquid pumping. Ultimately, the captured wave energy is converted into hydraulic energy, achieving energy conversion.

[0012] The beneficial effects of this invention are:

[0013] (1) The float of the present invention simplifies the overall structure compared with the original float, with fewer parts, reducing potential inspection and maintenance work.

[0014] (2) The diaphragm pump of the present invention is sealed in the float cavity, making the structure of the entire wave energy capture and conversion device more compact and simple. The float shell is completely sealed, preventing seawater from entering the float cavity and preventing seawater from damaging the outside of the diaphragm. This protects the key component of the float, the diaphragm pump, and improves the service life of the entire structure.

[0015] (3) The pump chamber of the diaphragm pump of the present invention is composed of a diaphragm sidewall capable of elastic deformation and a top plate and a bottom plate located at the upper and lower ends of the diaphragm sidewall. There are no pistons or other structures occupying the pump chamber volume within the enclosed pump chamber. Therefore, the present invention increases the pump chamber volume of the diaphragm pump, significantly increases the pumping water volume in one cycle, and improves the overall efficiency of the device.

[0016] (4) The change in pump chamber volume of the diaphragm pump of the present invention is achieved by the elastic deformation of the diaphragm sidewall. The axial extension and contraction of the sidewall corresponds to the increase and decrease of the pump chamber volume. The diaphragm pump of the present invention does not have the problem of piston sliding up and down relative to the cylinder, so there is no wear and jamming problem, which greatly improves the service life and energy conversion efficiency of the pump.

[0017] (5) The change in pump chamber volume of the diaphragm pump of the present invention is achieved by the elastic deformation of the diaphragm sidewall. The axial extension and contraction of the sidewall corresponds to the increase and decrease of the pump chamber volume. The diaphragm pump of the present invention does not have the problem of piston sliding up and down relative to the cylinder, so there is no wear and jamming problem, which greatly improves the service life and energy conversion efficiency of the pump.

[0018] (6) The direction of the folded recesses and folded protrusions of the diaphragm pump of the present invention is parallel to the top plate or bottom plate, which can reduce the possible deformation of the diaphragm sidewall in the radial direction.

[0019] (7) The present invention has a hoop ring designed in the folded recess of the layered corrugated pleats to prevent the diaphragm from deforming when subjected to large pressure. The hoop ring is fastened to the folded recess, thereby restricting the radial movement of the object and preventing the diaphragm sidewall from undergoing excessive radial deformation and failing to fully reset, which would reduce the energy capture efficiency of the diaphragm pump or even cause it to fail to work properly. Attached Figure Description

[0020] The foregoing and hereinafter detailed description of the invention becomes clearer when read in conjunction with the following drawings, in which:

[0021] Figure 1 is a cross-sectional view of the internal structure of the float of the present invention;

[0022] Figure 2 is a cross-sectional view of the diaphragm pump of the present invention.

[0023] In the picture:

[0024] 1. Pump chamber; 2. Diaphragm sidewall; 3. Top plate; 4. Suction valve; 5. Discharge valve; 6. Layered corrugated pleats; 7. Hoop ring; 8. Base plate; 9. Float rod; 10. Damping disc; 11. Suction pipe; 12. Drain pipe; 100. Float body; 200. Diaphragm pump. Embodiments of the present invention

[0025] To enable those skilled in the art to better understand the technical solutions of this invention, several specific embodiments will be used to further illustrate the technical solutions for achieving the objectives of this invention. It should be noted that the technical solutions claimed by this invention include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort should fall within the scope of protection of this invention.

[0026] An embodiment of the present invention provides a float that utilizes wave energy to pump liquid. The float includes a float body 100, which is a hollow, sealed shell. A diaphragm pump 200 is disposed within the internal cavity. The diaphragm pump 200 includes a pump chamber 1. The pump chamber 1 has a tubular diaphragm sidewall 2 capable of elastic deformation and a top plate 3 and a bottom plate 8 that move relative to each other. The top plate 3 and the bottom plate 8 are located at the upper and lower ends of the diaphragm sidewall 2, respectively, sealing the openings at both ends of the diaphragm sidewall 2. Ultimately, the diaphragm sidewall 2, the top plate 3, and the bottom plate 8 enclose and form a sealed pump chamber 1. The present invention changes the volume of the pump chamber 1 by the relative movement of the top plate 3 and the bottom plate 8, thereby realizing the water intake and drainage of the diaphragm pump 200, and ultimately converting the captured wave energy into hydraulic energy for transmission to equipment such as generators.

[0027] The present invention will now be explained and described in more detail with reference to specific implementation methods.

[0028] Example 1

[0029] This embodiment discloses a float that uses wave energy to pump liquid. Referring to Figure 1 of the specification, the float includes a hollow sealed shell and a diaphragm pump 200 disposed within the sealed shell. The sealed shell is the float body 100. The diaphragm pump 200 includes a pump chamber 1 with variable volume. The diaphragm pump 200 consists of a tubular diaphragm sidewall 2 capable of elastic deformation and a top plate 3 and a bottom plate 8 capable of relative axial movement. The top plate 3 and the bottom plate 8 seal the upper and lower ends of the diaphragm sidewall 2, and the three together form a pump chamber 1 with variable volume. The relative movement between the top plate 3 and the bottom plate 8 causes the volume of the pump chamber 1 to periodically increase and decrease. The top plate 3 is provided with a suction pipe 11 and a drain pipe 12 that are respectively connected to the pump chamber 1. The suction pipe 11 is equipped with a suction valve 4, and the drain pipe 12 is provided with a discharge valve 5. The other ends of the suction pipe 11 and the drain pipe 12 respectively penetrate the float body 100 and are connected to the outside.

[0030] In this embodiment, the top plate 3 is fixedly connected to the float body 100 via the suction pipe 11 and the discharge pipe 12. There is no relative movement between the top plate 3 and the float body 100. The bottom plate 8 is fixedly connected to a damping structure located outside the float body 100 via a connector. The float body 100 floats in the ocean and moves up and down with the waves, causing the top plate 3 connected to it to move together. Since the bottom plate 8 is connected to the damping structure, the damping structure provides resistance to limit the up and down movement of the bottom plate 8 and keep it stationary. Therefore, relative movement occurs between the top plate 3 and the bottom plate 8. The relative movement between the top plate 3 and the bottom plate 8 causes the diaphragm sidewall 2 set between the two plates to undergo elastic deformation, and at the same time causes the volume of the pump chamber 1 to change. This relative movement causes the volume of the pump chamber 1 to increase and decrease periodically, thereby drawing seawater into the pump chamber 1 through the suction pipe 11 or discharging seawater from the pump chamber 1 through the discharge pipe 12.

[0031] In the embodiments described in this invention, it will be understood that the valve generally refers to a valve, and a one-way valve is preferred.

[0032] In the embodiments described in this invention, it is understood that the cross-sectional shape of the tubular diaphragm sidewall 2 can be circular, rectangular, or hexagonal, etc. This invention does not limit its cross-sectional shape.

[0033] In the embodiments described in this invention, it is understood that the diaphragm sidewall 2 is made of elastic composite materials such as rubber and polyurethane. This invention does not limit the material used, as long as it can easily undergo elastic deformation. Furthermore, considering the operating environment of the float, corrosion-resistant materials are preferred for the diaphragm sidewall 2.

[0034] In the embodiments described in this invention, it is understood that the suction pipe 11 and the drain pipe 12 can both be installed on the top plate 3 or both on the bottom plate 8; furthermore, the top plate 3 can have the suction pipe 11 installed and the bottom plate 8 can have the drain pipe 12 installed, or the top plate 3 can have the drain pipe 12 installed and the bottom plate 8 can have the suction pipe 11 installed. This invention does not limit the specific installation positions of the suction pipe 11 and the drain pipe 12, as long as they can achieve water intake and drainage. Correspondingly, the float body 100 is provided with a water intake port and a water outlet. The suction pipe 11 and the drain pipe 12 pass through the water intake port and the water outlet respectively and communicate with the outside. Therefore, in order to ensure the sealing of the float shell, sealing structures such as sealing rubber rings are provided between the water intake port and the suction pipe 11, and between the water outlet and the drain pipe 12.

[0035] It should be noted that if the suction pipe 11 or the drain pipe 12 is installed on the base plate 8, the corresponding pipe needs to be slidably connected to the suction port or drain port of the float body 100.

[0036] In the embodiment described in this invention, the entire float floats in the ocean, and the float body 100 moves up and down with the rise and fall of the waves, which in turn drives the top plate 3 connected to it to move synchronously. Since the bottom plate 8 is connected to the damping structure, the damping structure provides motion resistance and prevents the bottom plate 8 from moving up and down with the top plate 3. Therefore, relative movement occurs between the top plate 3 and the bottom plate 8. This relative movement causes the diaphragm sidewall 2, which is set between the two, to undergo elastic deformation and causes the volume of the pump chamber 1 to change. During the reciprocating motion of the top plate 3, the volume of the pump chamber 1 periodically increases and decreases, so as to draw seawater into the pump chamber 1 through the suction valve 4 or discharge seawater from the pump chamber 1 through the discharge valve 4, and finally realize the pumping of liquid.

[0037] It is understandable that the relative movement between the top plate 3 and the bottom plate 8 includes the movement of the top plate 3 toward or away from the bottom plate 8. When the float body 100 is on the crest of a wave, it drives the top plate 3 to move away from the bottom plate 8, the distance between the two plates increases, the diaphragm sidewall 2 undergoes elastic deformation and is stretched, and the volume of the entire pump chamber 1 gradually increases. At this time, the suction valve 4 opens, and seawater is sucked into the pump chamber 1 through the suction pipe 11. When the float body 100 is on the trough of a wave, it drives the top plate 3 to move toward the bottom plate 8, the distance between the two plates decreases, the diaphragm sidewall 2 gradually returns to its original shape, the volume of the entire pump chamber 1 gradually decreases, the suction valve 4 closes, the discharge valve 5 opens, and the seawater in the pump chamber 1 is squeezed out of the pump chamber 1 through the drain pipe 12. The pressure energy of the discharged liquid caused by the compression between the top plate 3 and the bottom plate 8 allows the discharged seawater to enter the subsequent water storage container. At this point, the float converts the captured wave energy into hydraulic energy, achieving energy capture. This energy can then be transferred to a generator system to generate electricity, which can be used to power remote seabed equipment, unmanned surface vessels, robots, and monitoring systems.

[0038] Typically, a float 9 is connected to the bottom of the base plate 8. The float 9 serves as a connector between the base plate 8 and the damping structure. Its end connects to the base plate 8, and its tail directly penetrates the sealing shell of the float and is fixedly connected to the damping structure located outside the sealing shell. A bearing is installed between the float 9 and the sealing shell. As the float body rises and falls with the waves, the bearing minimizes friction and resistance between the float 9 and the sealing shell. Similarly, a sealing structure such as a sealing rubber ring is also provided between the float 9 and the sealing shell to ensure the sealing performance of the sealing shell. However, regardless of the sealing method used, it should fall within the protection scope of this invention.

[0039] Furthermore, it is worth mentioning that the damping structure connected to the bottom plate 8 can be a damping disc 10 or a fixed component located in the sea that is not prone to displacement or movement. Specifically, the tail of the float 9 is connected to the damping disc 10, which provides resistance to movement, thus preventing the bottom plate 8 from moving up and down with the float body 100. Under the action of the damping disc 10, the bottom plate 8 will essentially not float up and down with the float body 100, thereby allowing relative movement between it and the top plate 3, enabling liquid pumping.

[0040] Furthermore, the tail of the float 9 is connected to a fixed component in the sea. The fixed component can be a base set on the seabed, a power generation platform set in the sea, or even a reef or sunken rock in the sea. The fixed component is not easy to move with the ups and downs of the waves, so it can provide motion resistance to prevent the bottom plate 8 from moving up and down with the float body 100.

[0041] It should be noted that when the base plate 8 is connected to the damping disc 10 via the float 9, to prevent the float from drifting to distant sea areas with the waves, the damping disc 10 is usually equipped with flexible structures such as ropes and anchor chains, which are then connected to fixed components in the sea. Similarly, the fixed components can be a base on the seabed, a power generation platform set in the sea, or a reef or sunken rock in the sea. The fixed components hold the float in place, preventing it from drifting to distant sea areas.

[0042] Example 2

[0043] This embodiment discloses a float that uses wave energy to pump liquid. Based on the above embodiment, the diaphragm sidewall 2 is prone to axial elastic deformation, which includes axial expansion and contraction deformation and stretching deformation.

[0044] Example 3

[0045] This embodiment discloses a float that uses wave energy to pump liquid. Based on any of the above embodiments, the diaphragm sidewall 2 has stretchable, stacked corrugated pleats 6. When relative movement occurs between the top plate 3 and the bottom plate 8, the diaphragm sidewall 2 undergoes elastic deformation, and the stacked corrugated pleats 6 on the diaphragm sidewall 2 are stretched or compressed.

[0046] In the embodiments described in this invention, it is understood that when the float body 100 moves the top plate 3 away from the bottom plate 8, the distance between the two plates increases, the layered corrugated folds 6 on the diaphragm sidewall 2 are stretched open, the volume of the entire pump chamber 1 increases, the suction valve 4 is opened, and seawater is sucked into the pump chamber 1 from the suction pipe 11; while when the float body 100 moves the top plate 3 towards the bottom plate 8, the distance between the two plates decreases, the diaphragm sidewall 2 gradually returns to its original state, the layered corrugated folds 6 are compressed, the volume of the entire pump chamber 1 decreases, the suction valve 4 closes, the discharge valve 5 is opened, and seawater is squeezed out of the pump chamber 1 from the discharge pipe 12, completing the energy capture process.

[0047] Furthermore, after the layered corrugated folds 6 are unfolded, the direction of the folded recesses and folded protrusions is parallel to that of the top plate 3 or the bottom plate 8.

[0048] It should be noted that since the top plate 3 and bottom plate 8 of the diaphragm pump 200 are parallel to each other, the direction of the folded recesses and folded protrusions of the stacked corrugated folds 6 is parallel to one of the top plate 3 or the bottom plate 8, that is, parallel to both plates.

[0049] Example 4

[0050] This embodiment discloses a float that utilizes wave energy to pump liquid. Based on the above embodiment, to limit excessive deformation of the diaphragm sidewall 2 in the direction perpendicular to the axis, this embodiment installs a hoop 7 in the pleated recesses of the stacked corrugated pleats 6. The hoop 7 is fastened to the pleated recesses, thereby limiting the radial expansion of the object and preventing excessive radial deformation of the diaphragm sidewall 2 that would prevent it from fully returning to its original position, thus reducing the energy capture efficiency of the diaphragm pump 200, or even causing it to malfunction.

[0051] In the embodiments described in this invention, the hoop 7 can be designed in various sizes and shapes to adapt to different application requirements. Furthermore, the hoop 7 can be rigid or flexible to adapt to different working conditions.

[0052] However, regardless of whether the hoop 7 is installed, it should still be within the scope of protection of this invention. The hoop 7 is only used to prevent radial deformation when the diaphragm sidewall is subjected to excessive pressure. Under normal circumstances, the hoop 7 can be left uninstalled.

[0053] Example 5

[0054] This embodiment discloses a method for preparing a diaphragm pump. The method is used to prepare the diaphragm pump described in any one of the embodiments 1-4 above, and includes the following steps:

[0055] First, the tubular elastic composite material is processed by pressing and molding it into a structure with stretchable, layered corrugated folds 6. This structure is the diaphragm sidewall 2 of the diaphragm pump 200. Then, the top plate 3 and bottom plate 8 are installed and connected to the upper and lower ends of the processed tubular diaphragm sidewall, respectively, and the openings at both ends are sealed. Finally, the top plate 3, bottom plate 8 and tubular diaphragm sidewall 2 are enclosed to form the pump chamber 1. A suction pipe and a drain pipe are installed on the top plate 3. The suction pipe has a suction valve 4 inside, and the drain pipe has a discharge valve 5 inside.

[0056] In the embodiments described in this utility model, it is understood that the tubular diaphragm sidewall can be sealed to the top plate 3 and the bottom plate 8 by means of adhesive or bolt connection, and the present invention does not impose specific limitations on the form of sealing.

[0057] Example 6

[0058] This embodiment discloses a method for preparing a diaphragm pump. The method is used to prepare the diaphragm pump described in any one of the embodiments 1-4 above. The preparation method of the diaphragm pump in this embodiment is slightly different from that in embodiment 5. The diaphragm sidewall is formed by splicing together multiple hollow tubular structures. The specific preparation process is as follows:

[0059] Several hollow tubular structures with a large-diameter opening at one end and a small-diameter opening at the other end are formed by processing elastic composite materials. The hollow tubular structures are spliced ​​together axially to form a tubular diaphragm sidewall with stretchable, layered corrugated folds 6. The upper and lower ends of the tubular diaphragm sidewall are then connected to the top plate 3 and the bottom plate 8 respectively to form a closed diaphragm pump 200. The internal cavity formed between the diaphragm sidewall 2 and the top plate 3 and bottom plate 8 at both ends is the pump chamber 1. A suction pipe and a drain pipe are installed on the top plate 3 respectively. A suction valve 4 is installed in the suction pipe and a discharge valve 5 is installed in the drain pipe.

[0060] It should be noted that during the splicing process, the large-diameter openings are connected to each other to form the raised parts of the stacked corrugated folds 6, and the small-diameter openings are connected to each other to form the recessed parts of the stacked corrugated folds 6. After the splicing is completed, a tubular diaphragm sidewall with retractable stacked corrugated folds 6 is finally formed.

[0061] In the embodiments described in the invention, it is understood that large diameter and small diameter are relative concepts, referring to the fact that the openings at both ends of the processed hollow tubular structure are not the same size, with the larger opening being designated as the large-diameter opening and the other as the small-diameter opening. The present invention does not limit the opening diameter.

[0062] Example 7

[0063] This embodiment discloses the application of the float in capturing wave energy as described in any one of the embodiments 1-4 above.

[0064] Example 8

[0065] This embodiment discloses the application of the float described in any one of the embodiments 1-4 above in capturing wave energy. Based on embodiment 7, the specific application is as follows:

[0066] When the float is placed on the sea surface, the float body 100 moves up and down with the waves. During the up and down movement, the diaphragm pump 200 inside the float body 100 draws in and pumps out seawater, converting the captured wave energy into hydraulic energy, thus realizing energy conversion.

[0067] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0068] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A float that utilizes wave energy to pump liquid, characterized in that, The system includes a float body (100), which is a hollow, sealed shell. A diaphragm pump (200) is installed in the internal cavity. The diaphragm pump (200) includes a pump chamber (1) with a variable volume. The pump chamber (1) is surrounded by a diaphragm sidewall (2) capable of elastic deformation and a top plate (3) and a bottom plate (8) located at both ends of the diaphragm sidewall (2) that can move relative to each other. The diaphragm pump (200) is provided with a suction valve (4). The float body (100) is provided with a water inlet that matches the suction valve (4) and a water outlet that matches the discharge valve (5); the float body (100) moves with the undulation of the waves, and then drives the top plate (3) in the cavity to move relative to the bottom plate (8), causing the diaphragm sidewall (2) to undergo elastic deformation, and changing the volume of the pump cavity (1) to draw in liquid through the suction valve (4) or discharge liquid through the discharge valve (5).

2. A float for pumping liquid using wave energy according to claim 1, characterized in that, The top plate (3) is connected to the float body (100), and the bottom plate (8) is fixedly connected to a damping structure located outside the float body (100) to provide resistance and limit the up and down movement of the bottom plate (8).

3. A float for pumping liquid using wave energy according to claim 2, characterized in that, The base plate (8) is fixedly connected to a damping structure located outside the float body (100) via a float rod (9) to provide resistance and limit the up and down movement of the base plate (8).

4. A float for pumping liquid using wave energy according to claim 2, characterized in that, The damping structure includes a damping disk (10), and a base plate (8) is connected to the damping disk (10).

5. A float for pumping liquid using wave energy according to claim 1, characterized in that, The suction valve (4) and the discharge valve (5) are mounted on the top plate (3).

6. A float for pumping liquid using wave energy according to claim 1, characterized in that, The diaphragm sidewall (2) is prone to axial deformation.

7. A float for pumping liquid using wave energy according to claim 1, characterized in that, The elastic deformation of the diaphragm sidewall (2) includes axial expansion and contraction deformation and stretching deformation.

8. A float for pumping liquid using wave energy according to claim 1, characterized in that, The diaphragm sidewall (2) has retractable, stacked corrugated folds (6), and the relative movement of the top plate (3) and the bottom plate (8) causes the stacked corrugated folds (6) to extend and contract axially.

9. A float for pumping liquid using wave energy according to claim 8, characterized in that, The folded recess of the layered corrugated folds (6) is fitted with a hoop (7).

10. A float for pumping liquid using wave energy according to claim 8, characterized in that, The direction of the folded recesses and folded protrusions of the layered corrugated folds (6) is parallel to that of the top plate (3) or the bottom plate (8).

11. A float for pumping liquid using wave energy according to claim 1, characterized in that, The diaphragm sidewall (2) is made of an elastic composite material.

12. A method for preparing a diaphragm pump in a float according to any one of claims 1-11, characterized in that, Includes the following steps: Several hollow tubular structures with a large-diameter opening at one end and a small-diameter opening at the other end are formed by processing elastic composite materials. The hollow tubular structures are spliced ​​together axially to form a tubular diaphragm sidewall with expandable, layered corrugated pleats. The upper and lower ends of the tubular diaphragm sidewall are then connected to the top plate and bottom plate, respectively, to form a closed diaphragm pump. The tubular diaphragm sidewall, the top plate at both ends, and the bottom plate enclose the pump chamber. A suction pipe and a drain pipe are installed on the top plate, respectively. The suction pipe is equipped with a suction valve, and the drain pipe is equipped with a discharge valve.

13. The application of the float according to any one of claims 1-11 in capturing wave energy.

14. The application according to claim 13, characterized in that, The float is placed on the sea surface, and the float body moves up and down with the rise and fall of the waves. During the up and down movement, the diaphragm pump inside the float body draws in and pumps out seawater, and finally converts the captured wave energy into hydraulic energy, thus realizing energy conversion.

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