Novel oscillating floater type wave energy conversion device of integrated displacement pump

Abstract

The invention discloses a novel oscillating float type wave energy conversion device integrated with a positive displacement pump, which comprises a water supply system, a propelling system, a conveying system and a test pool, a test bed is provided with a one-way valve, a water storage belt, a U-shaped pipe and other components, the components are connected through hoses, the narrow opening end of the U-shaped pipe is connected with a water outlet, and the water outlet is connected with a water pump. One end of a bridge type one-way valve on the test bed is connected with a water inlet, the other end of the bridge type one-way valve is connected with a hydraulic cylinder, a group of one-way valves on the test bed are connected with a flexible pump through hoses, and the hydraulic cylinder and the flexible pump are arranged in a test pool. According to the invention, the energy transfer process is optimized, the stability is ensured, and the energy conversion efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of wave energy power generation, in particular to a novel oscillating float type wave energy conversion device integrated with a positive displacement pump. Background Art

[0002] Among the many marine energy resources, wave energy is gaining more and more attention due to its large reserves, good stability and relatively low construction cost.

[0003] Wave energy power generation technology can be divided into four types according to the power transmission method: mechanical, pneumatic, hydraulic and hydraulic. Among them, the hydraulic wave energy power generation device is considered to be the most superior device at present due to its high power generation efficiency and stable operation. The oscillating float wave energy conversion device has become the most widely studied and applied wave energy conversion technology in various countries due to its simple structure and reliable performance, and has received widespread attention.

[0004] However, the traditional hydraulic oscillating float device still faces many problems, such as low transmission efficiency, short transmission distance, limited conversion efficiency and short device life. In addition, due to the low wave energy density in my country, the large-scale development and application of hydraulic wave energy pumps are limited. Summary of the invention

[0005] In order to overcome the problems of low transmission efficiency, short transmission distance, limited conversion efficiency and short device life in the wave energy power generation process in the prior art, resulting in low power generation efficiency, the present invention provides a novel oscillating float wave energy conversion device with an integrated positive displacement pump, which converts wave energy into hydraulic energy, and uses the hydraulic energy to achieve high-altitude transportation of water sources, which is further used for power generation.

[0006] The technical problem solved by the present invention adopts a solution: a new type of oscillating float type wave energy conversion device with integrated volumetric pump. The device includes three systems: a water supply system, a conveying system and a propulsion system. The water supply system is composed of a hydraulic cylinder, a tripod, a float, a weight, a flexible rope and a spring. The conveying system is composed of a test bench, a one-way valve, a U-shaped tube, a water storage bag and a filter. The one-way valve, the U-shaped tube and the water storage bag are connected by a hose. The propulsion system includes a float, a flexible pump, a base and a spring.

[0007] Furthermore, the flexible pump and the base are connected through an O-ring and a groove of the base, and then the O-ring and the base are connected and fixed with screws, and then sealed with a sealant. A linear spring is installed between the flexible pump and the base. The present invention uses a spring-flexible pump structure to enhance the absorption of wave energy and further improve the conversion efficiency of the flexible pump.

[0008] The flexible pump and the float are connected by a flexible rope. On the one hand, it plays a certain role in buffering the impact of waves and prolonging the service life of the equipment; on the other hand, it can better adapt to waves of different frequencies and amplitudes, and improve the wave absorption efficiency to a certain extent.

[0009] Furthermore, the hydraulic cylinder and the float are connected by a flexible rope, which acts as a buffer. A weight is attached to the bottom of the float to increase the downward stroke of the hydraulic cylinder. In addition, there is a fixed plate between the hydraulic cylinder and the float, which is connected to the piston lever through a linear spring. The upper end of the spring is connected to the piston rod, and the lower end is connected to the fixed plate, which uses elastic potential energy to increase the return stroke of the hydraulic cylinder. The combination of the weight and the linear spring speeds up the process of the water supply system and improves the efficiency of wave energy conversion.

[0010] Furthermore, the positions of the various components of the conveying system are placed on the test bench, and each component is connected by a hose. The inlet and outlet of the flexible pump are connected to the large end of the U-shaped tube, and there is a one-way valve in between to prevent the fluid from flowing back. The inlet and outlet of the hydraulic cylinder are respectively connected between the one-way valve 1 and the one-way valve 3, and between the one-way valve 2 and the one-way valve 4. Then the one-way valve 5, the water storage bag and the U-shaped tube are connected between the one-way valve 1 and the one-way valve 3; and the filter and the water source to be conveyed are connected between the one-way valve 3 and the one-way valve 4. The continuous water supply through the action of the hydraulic cylinder, the further advancement of the flexible pump and the design of the simple hydraulic structure improve the efficiency of the conveying.

[0011] Furthermore, there is a cabinet at the bottom of the test bench, which can hold flexible pumps and hydraulic cylinders, and various components are placed at the top. In addition, there is a set of universal casters and a set of fixed casters at the bottom of the test bench, which improves the portability of the experimental device.

[0012] Furthermore, in the present invention, the flexible pump and the tripod are both fixed by bolts, and this fixing method facilitates future maintenance.

[0013] The beneficial effects of the present invention are as follows: first, in terms of the life of the device, the design of flexible rope connection and flexible pump is adopted to improve the durability of the equipment in the wave environment. At the same time, the anti-corrosion principle of paint is used to reduce the production cost and enhance the anti-corrosion performance, further extending the service life of the device. In terms of transmission efficiency, the device adopts a simplified wave pressure system and reduces energy loss through a primary delivery structure. Through the action of the hydraulic system, water can be continuously supplied to ensure the high efficiency and stability of the device during the wave energy transmission process. In terms of conversion efficiency, a structural design combining a flexible pump and a spring is adopted. By driving the linear spring with a heavy object, the stroke of the hydraulic surface piston is increased, which significantly improves the conversion efficiency of wave energy. This innovative design optimizes the energy transfer process and ensures efficient energy utilization. Finally, in terms of transmission height, a U-shaped tube structure is used as the primary delivery place, so that the fluid can reach a higher position, thereby further improving the transmission height of wave energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the flexible pump of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the test bench of the present invention.

[0018] In the figure: 1. first float; 2. tripod; 3. hydraulic cylinder; 4. fifth one-way valve; 5. test bench; 6. seventh one-way valve; 7. eighth one-way valve; 8. sixth one-way valve; 9. U-shaped tube; 10. water storage belt; 11. second one-way valve; 12. first one-way valve; 13. fourth one-way valve; 14. third one-way valve; 15. caster; 16. first spring; 17. fixing plate; 18. second float; 19. first flexible rope; 20. weight; 21. O-ring; 22. test pool; 23. base; 24. flexible pump; 25. second flexible rope; 26. lifting eye nut; 27. tension spring. DETAILED DESCRIPTION

[0019] The present invention will be described below with reference to the accompanying drawings to ensure that those skilled in the art can better understand the objectives, technical solutions and advantages of the present invention.

[0020] As shown in the figure, a new type of oscillating float wave energy conversion device with integrated positive displacement pump includes a water supply system, a propulsion system, a conveying system and a test pool.

[0021] In the water supply system, the tripod 2 is fixed in the test pool 22 by screws, the hydraulic cylinder 3 is fixed on the platform above the tripod 2, a through hole is provided on the piston lever of the hydraulic cylinder 3, the piston lever is connected to the third flexible rope by a bolt passing through the through hole, a second float 18 is tied below the third flexible rope, a weight is connected to the second float 18 below the first flexible rope 19, a first spring 16 is connected to the lower end of the piston lever, and a fixing plate 17 is connected to the lower end of the first spring 16; in the propulsion system, the first float 1 is connected to the flexible pump 24 by the second flexible rope 25, the flexible pump 24, the O-ring 21 and the base 23 are connected by screws, a spring 27 is connected between the inner cavity of the flexible pump and the base, and the base is connected by screws. The nail is connected to the test pool 22; in the conveying system, the first one-way valve 12 and the third one-way valve 14, and the second one-way valve 11 and the fourth one-way valve 13 are respectively connected to the hydraulic cylinder 3, a water inlet is connected between the third one-way valve 14 and the fourth one-way valve 13, a fifth one-way valve 4 is connected between the first one-way valve 12 and the second one-way valve 11, the fifth one-way valve 4 is connected to the water storage bag 10 through a pipeline, the water storage belt 10 is connected to the sixth one-way valve 8 through a pipeline, the sixth one-way valve 8 is connected to the U-shaped tube 9 through a pipeline, the narrow end of the U-shaped tube 9 is connected to the water outlet, the U-shaped tube 9 is connected to the seventh one-way valve 6 and the eighth one-way valve 7 through a pipeline, and the seventh one-way valve 6 and the eighth one-way valve 7 are respectively connected to the flexible pump 24.

[0022] In this example, Figure 1 As shown, in order to improve the delivery efficiency. The bridge-type one-way valves composed of the first one-way valve 12, the second one-way valve 11, the third one-way valve 14 and the fourth one-way valve 13 are respectively connected to the two chambers of the hydraulic cylinder 3. The piston lever of the hydraulic cylinder 3 is tied with a third flexible rope, and the end of the third flexible rope is connected to a second float 18. The above structure enables the device to provide pressure for the hydraulic circuit regardless of the crest or trough of the waves, and can continuously deliver liquid. The water storage bag connected to the bridge-type one-way valve is made of flexible material, which can speed up the water delivery efficiency while storing water.

[0023] In this example, Figure 1 As shown, in order to increase the service life of the device, the piston lever and the second float 18 in the water supply system, and the flexible pump 24 and the first float 1 in the propulsion system are connected by flexible ropes, which play a certain buffering role for the impact of waves and extend the service life of the equipment.

[0024] In this example, Figure 2 As shown, in order to improve the absorption efficiency of the device, a tension spring 27 is connected between the flexible pump 24 and the base, which can enable the flexible pump 24 to recover faster; the flexible rope between the flexible pump 24 and the first float 1 can better adapt to waves of different frequencies and amplitudes, thereby improving the wave absorption efficiency to a certain extent.

[0025] In this example, Figure 3As shown, in order to improve the convenience of the device, the upper part of the test bench 5 is provided with a T-slot, and each component is connected to the test bench 5 by a T-bolt, which is convenient for disassembly and can be freely adjusted; the lower part of the test bench 5 has a cabinet, which can be used to place a flexible pump, a hydraulic cylinder and various components, and the bottom of the test bench has a set of universal casters and a set of fixed casters, which improves portability.

[0026] Principle of use: In the initial state, due to its own weight, the first spring 16 under the piston lever is in an energy storage state. When the second float 18 rises with the waves, the piston lever compresses the gas in the upper half of the hydraulic cylinder 3. When the waves are at the trough, the piston lever compresses the gas in the lower half of the hydraulic cylinder. The side with a larger volume in the hydraulic cylinder will transport the required liquid to the bridge circuit, and the side with a smaller volume in the hydraulic cylinder will continue to transport the liquid in the circuit upward and store it in the water storage bag 10. When the wave is at the crest, the first float 1 connected to the flexible pump 24 rises, the volume of the flexible pump 24 increases, the pressure of the two lines directly connected to the flexible pump 24 decreases, and the pressure of the pipeline connected to the water storage bag 10 increases relatively. The liquid in the water storage belt 10 will continue to be transported upward to the U-shaped tube 9, and the liquid in the U-shaped tube 9 will eventually be transported to the target position through the water outlet.

[0027] The skilled person should understand that the implementation of the present invention is not limited to the above examples. The descriptions in these examples and the specification are intended to illustrate the basic concepts of the present invention. The present invention allows for various adjustments and optimizations without violating the core concept and coverage of the present invention. All these adjustments and optimizations fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is determined by the attached claims and their equivalent expressions.

Claims

1. A novel oscillating float wave energy conversion device with integrated positive displacement pump, consisting of a water supply system, a propulsion system, a conveying system and a test tank, characterized in that: The test bench is equipped with components such as a one-way valve (4), (6), (7), (8), (11), (12), (13), (14), a water storage belt (10), and a U-shaped tube (9). The components are connected by a hose. The narrow end of the U-shaped tube (9) is connected to a water outlet. One end of the bridge-type one-way valve (11), (12), (13), (14) on the test bench is connected to a water inlet, and the other end is connected to a hydraulic cylinder (3). A group of one-way valves (6), (7) on the test bench are connected to a flexible pump through a hose. The hydraulic cylinder (3) and the flexible pump (24) are placed in a test pool (22).

2. The novel oscillating float wave energy conversion device with integrated positive displacement pump according to claim 1 is characterized in that: The water supply system comprises a tripod (2), a hydraulic cylinder (3), a first flexible rope (19), a second float (18), a weight (20) and a first spring (16); the tripod (2) is fixed in a test pool (22) by screws; the hydraulic cylinder (3) is fixed on a platform above the tripod; a through hole is provided on a piston lever of the hydraulic cylinder; the piston lever is connected to a third flexible rope by a bolt passing through the through hole; a second float (18) is fastened below the third flexible rope; a weight (20) is connected below the second float (18) by the first flexible rope (19); the lower end of the piston lever is connected to a first spring (16); the lower end of the first spring (16) is connected to a fixing plate (17).

3. The novel oscillating float wave energy conversion device with integrated positive displacement pump according to claim 1 is characterized in that: The propulsion system comprises a first float (1), a flexible pump (24), a spring (27) and a base (23); the first float (1) is connected to the flexible pump (24) via a second flexible rope (25); the flexible pump (24) is connected to the base (23) via an O-ring (21); a spring (27) is connected between the inner cavity of the flexible pump and the base (23); and the base (23) is connected to a test pool (22) via screws.

4. The novel oscillating float wave energy conversion device with integrated positive displacement pump according to claim 1 is characterized in that: The conveying system comprises a one-way valve (4), (6), (7), (8), (11), (12), (13), (14), a water storage bag (10), a U-shaped tube (9) and a test bench (5); the first one-way valve (12) and the third one-way valve (14), and the second one-way valve (11) and the fourth one-way valve (13) are respectively connected to the hydraulic cylinder (3); a water inlet is connected between the third one-way valve (14) and the fourth one-way valve (13); the first one-way valve (12) and the second one-way valve (11) are connected to the hydraulic cylinder (3); 1), the fifth one-way valve (4) is connected to a water storage bag (10) through a pipeline, the water storage bag (10) is connected to a sixth one-way valve (8) through a pipeline, the sixth one-way valve (8) is connected to a U-shaped tube (9) through a pipeline, the narrow end of the U-shaped tube (9) is connected to a water outlet, the U-shaped tube (9) is connected to a seventh one-way valve (6) and an eighth one-way valve (7) through a pipeline, and the seventh one-way valve (6) and the eighth one-way valve (7) are respectively connected to a flexible pump (24).

5. The novel oscillating float wave energy conversion device with integrated positive displacement pump according to claim 4 is characterized in that: The bottom of the test bench (5) is provided with two sets of casters (15) by means of screws. The casters (15) are divided into a set of universal casters and a set of fixed casters. The upper part of the test bench (5) is provided with a T-slot, which is connected to various components by means of T-bolts.

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