Water tower type wave energy power generation device and method

Abstract

The present invention provides a water tower type wave energy power generation device and method, the device comprises: an underwater piston unit, a piston motion drive unit and a high-position energy storage power generation unit; the high-position energy storage power generation unit comprises a high-position water tower, a hydro-generator set, a water diversion pipe and a return pipe; the piston motion drive unit comprises a power take-off buoy; the underwater piston unit comprises a piston pump cylinder, the piston pump cylinder has a piston installed in a sliding seal inside, the axis of the piston is fixed to one end of a piston lifting and lowering traction rope; the other end of the piston lifting and lowering traction rope is sealed and passed through the top cover of the piston pump cylinder, and then coaxially installed to the axis of the power take-off buoy. It has the following advantages: (1) Most of the facilities are arranged in the still water area below the sea surface, avoiding the influence of wind and waves, and greatly enhancing safety and stability. (2) The dispersed wave energy is gathered through the piston pump and the high-position water tower to achieve stable power generation; (3) The suspended design of the underwater facilities greatly reduces the difficulty of offshore construction.

Description

Technical Field

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

[0002] In traditional wave power generation, the energy collection facilities generally float on the water surface, and the energy collected is only the fluctuation of waves on the water surface. In addition, traditional wave power generation is easily affected by wind and waves, and the safety and stability of the equipment are not good. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a water tower type wave energy power generation device and method, which can effectively solve the above problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a water tower type wave energy power generation device, comprising: an underwater piston unit, a piston motion driving unit and a high-position energy storage power generation unit;

[0006] The high-level energy storage power generation unit comprises a high-level water tower (1), a hydro-turbine generator set (2), a water diversion pipe (20) and a return pipe (12); the high-level water tower (1) introduces high-potential energy water in the high-level water tower (1) into the hydro-turbine generator set (2) through the water diversion pipe (20) to generate electricity, and the discharge end of the hydro-turbine generator set (2) is connected to the sea through the return pipe (12);

[0007] The piston motion driving unit comprises a power take-off buoy (3); the power take-off buoy (3) floats on the water surface;

[0008] The underwater piston unit comprises a piston pump cylinder (15), a piston pump supporting buoy (10) is sleeved on the outside of the piston pump cylinder (15), a plurality of piston pump fixing cables (16) are arranged on the outside of the piston pump cylinder (15), and the other ends of the piston pump fixing cables (16) are fixed to pile foundations (17) on the seabed, thereby making the piston pump cylinder (15) suspended and fixed in calm waters below the sea level;

[0009] The piston pump cylinder (15) is a structure with an open bottom and a sealed top; a piston (13) is installed inside the piston pump cylinder (15) in a liftable, sliding and sealed manner, and the piston pump cylinder (15) is divided into an upper piston pump chamber (14) and a lower piston pump chamber (4) by the piston (13); wherein the bottom of the lower piston pump chamber (4) is connected to the sea to form an open lower chamber; a one-way water inlet valve (22) is provided on the piston (13), and the upper piston pump chamber (14) is connected to the high-level water tower (1) through a lifting water pipe (21); a one-way water outlet valve (23) is installed at one end of the lifting water pipe (21);

[0010] The axis of the piston (13) is fixed to one end of a piston lifting and lowering traction rope (6); the other end of the piston lifting and lowering traction rope (6) is sealed and passed through the top cover of the piston pump cylinder (15), and then coaxially installed to the axis of the power take-off buoy (3); when the power take-off buoy (3) floats up or sinks, the piston (13) is driven to move up and down through the piston lifting and lowering traction rope (6).

[0011] Preferably, the outer periphery of the piston (13) forms a sliding sealing structure with the inner wall of the piston pump cylinder (15) through the piston seal (11).

[0012] Preferably, a piston cable seal (9) and a fixed guide mechanism (8) are provided at the axial center position of the top sealing cover of the piston lifting traction cable (6) and the piston pump cylinder (15).

[0013] Preferably, the piston (13) is a conical counterweight design structure.

[0014] Preferably, it further comprises a horizontal limiting unit; the horizontal limiting unit comprises a limiting frame (5), a limiter (7), a limiting frame fixing rope (18) and a limiting frame supporting buoy (19);

[0015] The limit frame (5) is coaxially arranged between the power take-off buoy (3) and the piston pump cylinder (15); the limit frame support buoy (19) is sleeved and installed on the outside of the limit frame (5); the outside of the limit frame (5) is fixed to one end of a limit frame fixing cable (18); the other end of the limit frame fixing cable (18) is fixed to a pile foundation (17), thereby making the limit frame (5) suspended and fixed in calm waters below the sea level;

[0016] The limit frame (5) is provided with a limiter (7), the piston lifting and lowering traction rope (6) passes through the limiter (7), and the limiter (7) is used to limit the horizontal movement of the piston lifting and lowering traction rope (6).

[0017] Preferably, it also includes a safety protection unit;

[0018] The safety protection unit comprises a maximum tension safety disconnection lock (24) and a power take-off buoy safety backup rope (25);

[0019] The outside of the power take-off buoy (3) is fixed to the pile foundation (17) via a power take-off buoy safety standby rope (25);

[0020] The piston lifting and lowering traction rope (6) is provided with a maximum pulling force safety disconnection lock (24).

[0021] The present invention also provides a method for a water tower type wave energy power generation device, comprising the following steps:

[0022] Step 1, when the power take-off buoy (3) sinks, the piston lifting and lowering traction rope (6) sags, the piston (13) moves downward under the action of its own gravity, the one-way water inlet valve (22) at the bottom of the piston (13) opens, and seawater enters the upper chamber (14) of the piston pump through the one-way water inlet valve (22), thereby achieving water intake;

[0023] When the power take-off buoy (3) floats upward, the piston lifting traction rope (6) is tightened, thereby pulling the piston (13) upward; when the piston (13) moves upward, it squeezes the seawater in the upper chamber (14) of the piston pump, thereby causing the seawater in the upper chamber (14) of the piston pump to be lifted to the high-level water tower (1) through the one-way water outlet valve (23) and the lifting water pipe (21);

[0024] The horizontal movement of the piston lifting and pulling rope (6) is limited by a limiter (7) installed on the limit frame (5);

[0025] Step 2, the seawater in the high-level water tower (1) is introduced into the hydro-generator set (2) through the water diversion pipe (20), and the high-potential energy water is then introduced into the hydro-generator set (2) to generate electricity;

[0026] Therefore, the power take-off buoy (3) moves up and down and left and right due to the waves, and the left and right lateral displacement is adjusted to up and down displacement by the limiter (7), thereby driving the piston (13) to move up and down, lifting seawater into the high-level water tower (1) and generating electricity.

[0027] Preferably, it also includes:

[0028] A maximum tension safety disconnect lock (24) is arranged on the piston lifting traction rope (6) to ensure that when the maximum design tension is reached, the maximum tension safety disconnect lock (24) is disconnected to protect the underwater device, so that the power take-off buoy (3) is pulled by the power take-off buoy safety standby rope (25) to float freely.

[0029] The water tower wave energy power generation device and method provided by the present invention have the following advantages:

[0030] (1) Most of the facilities are located in still waters below the sea surface, avoiding the impact of wind and waves and greatly enhancing safety and stability.

[0031] (2) The dispersed wave energy can be gathered through piston pumps and high-level water towers to achieve stable power generation;

[0032] (3) The suspended design of underwater facilities greatly reduces the difficulty of offshore construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of the water tower type wave energy power generation device provided by the present invention.

[0034] in:

[0035] 1-high-level water tower; 2-hydraulic generator set; 3-power take-off buoy; 4-lower chamber of piston pump; 5-limiting frame; 6-piston lifting and lowering traction rope; 7-limiter; 8-fixed guide mechanism; 9-piston rope seal; 10-piston pump supporting buoy; 11-piston seal; 12-return pipe; 13-piston; 14-piston pump upper chamber; 15-piston pump cylinder; 16-piston pump fixing rope; 17-pile foundation; 18-limiting frame fixing rope; 19-limiting frame supporting buoy; 20-water diversion pipe; 21-lifting water pipe; 22-one-way water inlet valve; 23-one-way water outlet valve; 24-maximum tension safety disconnect lock; 25-power take-off buoy safety standby rope. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The invention belongs to the field of wave energy power generation, and specifically relates to a method of driving the piston of a piston pump to move up and down by means of sea waves acting on a power take-off buoy, thereby lifting sea water to a high-level water tower, and then using the potential energy of the water level difference to drive a turbine to generate electricity.

[0038] In traditional wave power generation, the energy collection facilities generally float on the water surface, and the energy collected is only the wave fluctuations on the water surface. However, the present invention sets the energy collection device in the underwater still water area, and can collect small waves or large waves by changing the stroke of the piston pump. The underwater setting avoids the influence of wind and waves, and the device is safe and stable. In traditional wave power generation, the power generation device is distributed in each energy collection unit. This method concentrates the dispersed wave energy through a high-level water tower and then generates electricity, which increases the stability of power generation.

[0039] The present invention provides a water tower type wave energy power generation device, referring to Figure 1 , including: underwater piston unit, piston motion drive unit and high-position energy storage and power generation unit;

[0040] The high-level energy storage power generation unit includes a high-level water tower 1, a hydro-generator set 2, a water diversion pipe 20 and a return pipe 12; the high-level water tower 1 introduces the high-potential energy water in the high-level water tower 1 into the hydro-generator set 2 for power generation through the water diversion pipe 20, and the discharge end of the hydro-generator set 2 is connected to the sea through the return pipe 12;

[0041] The piston motion driving unit includes a power take-off buoy 3; the power take-off buoy 3 floats on the water surface;

[0042] The underwater piston unit includes a piston pump cylinder 15, a piston pump support buoy 10 is sleeved on the outside of the piston pump cylinder 15, and a plurality of piston pump fixing cables 16 are arranged outside the piston pump cylinder 15, and the other end of the piston pump fixing cable 16 is fixed to a pile foundation 17 on the seabed, so that the piston pump cylinder 15 is suspended and fixed in calm waters below the sea level;

[0043] The piston pump cylinder 15 is a structure with an opening at the bottom and a sealing at the top; the piston 13 is installed inside the piston pump cylinder 15 in a liftable sliding and sealing manner, and the piston pump cylinder 15 is divided into a piston pump upper chamber 14 and a piston pump lower chamber 4 through the piston 13; wherein, the outer periphery of the piston 13 forms a sliding sealing structure with the inner wall of the piston pump cylinder 15 through the piston seal 11.

[0044] The bottom of the piston pump lower chamber 4 is connected to the sea to form an open lower chamber; the piston 13 is provided with a one-way water inlet valve 22, and the piston pump upper chamber 14 is connected to the high-level water tower 1 through a lifting water pipe 21; a one-way water outlet valve 23 is installed at one end of the lifting water pipe 21;

[0045] The axis of the piston 13 is fixed to one end of the piston lifting and traction rope 6; the other end of the piston lifting and traction rope 6 is sealed and passed through the top cover of the piston pump cylinder 15, and then coaxially installed to the axis of the power take-off buoy 3; wherein, a piston rope seal 9 and a fixed guide mechanism 8 are provided at the axis center position of the piston lifting and traction rope 6 and the top cover of the piston pump cylinder 15.

[0046] When the power take-off buoy 3 floats up or down, the piston 13 is driven to move up and down by the piston lifting and lowering traction rope 6 .

[0047] In the present invention, the piston 13 is a conical counterweight design structure.

[0048] It also includes a horizontal limit unit; the horizontal limit unit includes a limit frame 5, a limiter 7, a limit frame fixing cable 18 and a limit frame supporting buoy 19;

[0049] The limit frame 5 is coaxially arranged between the power take-off buoy 3 and the piston pump cylinder 15, the limit frame support buoy 19 is sleeved and installed on the outside of the limit frame 5, the outside of the limit frame 5 is fixed to one end of the limit frame fixing cable 18, and the other end of the limit frame fixing cable 18 is fixed to the pile foundation 17, so that the limit frame 5 is suspended and fixed in calm waters below the sea level;

[0050] The limit frame 5 is provided with a limiter 7 , and the piston lifting and lowering traction rope 6 passes through the limiter 7 . The limiter 7 is used for limiting the horizontal movement of the piston lifting and lowering traction rope 6 .

[0051] It also includes a safety protection unit;

[0052] The safety protection unit includes a maximum tension safety disconnect lock 24 and a power take-off buoy safety backup rope 25;

[0053] The outside of the power take-off buoy 3 is fixed to the pile foundation 17 via a power take-off buoy safety standby rope 25;

[0054] The piston lifting and lowering traction rope 6 is provided with a maximum tension safety disconnection lock 24 .

[0055] A specific embodiment is described below:

[0056] The present invention comprises 5 main components:

[0057] (1) High-level water tower

[0058] High-level water tower 1: The high-level water tower 1 gathers the water flow lifted by multiple underwater piston pumps to form a large amount of hydraulic potential energy reserve;

[0059] (II) Hydro-generator Set

[0060] Hydro-turbine generator set 2: water in the high-level water tower 1 is introduced into the hydro-turbine generator set 2 through the water diversion pipe 20 provided in the high-level water tower 1, so as to drive the hydro-turbine generator set 2 to generate electricity;

[0061] (3) Submersible piston pump

[0062] The underwater piston pump comprises a piston pump cylinder 15 and a piston 13 .

[0063] The outside of the piston pump cylinder 15 is suspended and fixed in a still water area below the sea level through the combined action of a plurality of piston pump support buoys 10, a plurality of piston pump fixing cables 16 and a pile foundation 17;

[0064] The piston 13 is driven by the power take-off buoy 3 through the piston lifting and lowering traction rope 6 of the axis to achieve up and down movement, and pump the seawater into the high-level water tower 1.

[0065] (IV) Limiting frame 5

[0066] The limit frame 5 is suspended and fixed in the still water area below the sea level by the combined action of the limit frame support buoy 19, the limit frame fixing cable 18 and the pile foundation 17;

[0067] A limiter 7 is provided in the middle of the limit frame 5, and the piston lifting traction rope 6 passes through the limiter 7. The limiter 7 controls the lateral displacement of the piston lifting traction rope 6;

[0068] The limit frame 5 is provided with a plurality of limit frame fixing cables 18 and a plurality of pile foundations 17 to enhance the strength of the limiter 7 against the lateral displacement of the piston lifting and pulling cables 6. The limiter 7 is installed between the piston pump cylinder 15 and the power take-off buoy 3, at the axial position of the piston pump cylinder 15.

[0069] (V) Power take-off buoy 3

[0070] The power take-off buoy 3 is connected to the piston lifting and lowering traction rope 6 , and the piston lifting and lowering traction rope 6 is connected to the piston 13 .

[0071] The power take-off buoy 3, the piston lifting and lowering traction rope 6, the piston pump cylinder 15 and the piston 13 are arranged in the same axial direction.

[0072] The power take-off buoy 3 moves up, down, left, and right due to the waves, and the left and right lateral displacement is adjusted to up and down displacement by the limiter 7, driving the piston 13 to move up and down, and lifting the seawater to the high-level water tower 1.

[0073] In practical applications, the power take-off buoy 3 is a hollow sphere or a sphere made of a light material, or can be olive-shaped and can float on the water. The power take-off buoy 3 is connected to the piston lifting traction rope 6, the piston lifting traction rope 6 is connected to the piston 13, and the power take-off buoy 3 is separately connected to the power take-off buoy safety standby rope 25. When the piston lifting traction rope 6 reaches the maximum design tension, the maximum tension safety disconnection lock 24 is disconnected, and the power take-off buoy safety standby rope 25 pulls the power take-off buoy 3 to float freely. The buoyancy of the power take-off buoy 3 is much greater than the weight of the piston 13 and the friction resistance of the piston lifting traction rope 6.

[0074] In the present invention, the piston pump support buoy 10, the piston pump fixing rope 16 and the pile foundation 17 are arranged outside the piston pump cylinder 15, and are suspended and fixed in calm waters below the sea level. The piston pump cylinder 15 is provided with a piston 13, and a one-way water inlet valve 22 is arranged on the piston 13. The piston 13 is connected to the power take-off buoy 3 through the piston lifting traction rope 6. The inner wall of the piston pump cylinder 15 is provided with a plurality of piston slide rails to facilitate the sliding of the piston. The piston 13 is provided with a piston seal 11 to form a sliding seal with the inner wall of the piston pump cylinder 15. The piston lifting traction rope 6 and the piston pump cylinder 15 top cover are provided with a piston rope seal 9 and a fixing guide mechanism 8 at the axial position.

[0075] The piston pump cylinder 15 has a cylindrical shell, and the bottom is connected to the sea to form an open piston pump lower chamber 4. When the power take-off buoy 3 sinks, the piston lifting traction rope 6 sags, and the piston 13 moves downward under its own gravity. The conical piston 13 design helps to reduce the downward resistance. The one-way water inlet valve 22 at the bottom of the piston 13 is opened, and water enters the piston pump cylinder 15; the top of the piston pump cylinder 15 is closed with a one-way water outlet valve 23 connected to the high-level water tower 1. When the power take-off buoy 3 floats up, the piston lifting traction rope 6 is tightened, and the piston 13 moves upward, squeezing the seawater in the piston pump upper chamber 14 to the high-level water tower 1. The piston 13 in the piston pump cylinder 15 is designed with a conical counterweight, and the weight of the piston 13 is much greater than its downward hydraulic resistance and the friction resistance of the piston lifting traction rope 6. Under calm sea conditions, the piston 13 is in the middle of the piston pump cavity, and the maximum stroke of the piston pump cylinder 15 is greater than the maximum design wave height.

[0076] The limit frame 5 is installed with a limit frame supporting buoy 19, the limit frame 5 is connected with the limit frame fixing cable 18 and the pile foundation 17, and is suspended and fixed in calm waters below the sea level. The limit frame 5 is installed with a limiter 7 for limiting the horizontal movement of the piston lifting and traction cable 6. The piston lifting and traction cable 6 is provided with a maximum tension safety disconnection lock 24 to ensure that when the maximum design tension is reached, the maximum tension safety disconnection lock 24 is disconnected to protect the underwater device, so that the power take-off buoy 3 is towed by the power take-off buoy safety standby cable 25 to float freely.

[0077] The high-level water tower 1 is connected to the one-way water outlet valve 23 of the piston pump cylinder 15 through a lifting water pipe 21. The high-level water tower 1 is provided with a water diversion pipe 20 to introduce high potential energy water into the hydro-generator set 2 for power generation.

[0078] The water tower type wave energy power generation device is composed of a power take-off buoy 3, a piston pump cylinder 15 and a limit frame 5 to form a wave energy collection unit. Multiple wave energy collection units gather water to the high-level water tower, thereby concentrating the dispersed wave energy, and then passing through the hydro-turbine generator set to form stable output electrical energy.

[0079] In the present invention, the piston pump is suspended in a still water area below the sea surface, and the piston stroke of the piston pump is greater than the designed maximum wave height. A plurality of piston pump support buoys 10 are symmetrically arranged outside the piston pump housing, one or more one-way water inlet valves 22 are symmetrically arranged, and one or more one-way water outlet valves 23 are arranged.

[0080] The piston pump barrel 15 is cylindrical, and can be designed as a cylindrical shell with a closed top and an open bottom. As mentioned above, it can also be designed as a cylindrical shell that is completely closed from top to bottom. The top and bottom of the cylindrical piston pump shell are completely sealed, and the lower chamber of the piston pump is filled with air and is completely sealed. The lower chamber of the piston pump is connected to the air pipe, and is connected to the atmosphere above the sea surface through the air pipe; the one-way water inlet and outlet and the water inlet and outlet valves are installed on the shell in the upper chamber area of ​​the piston pump. When the piston is in the downward stroke, water enters the upper chamber of the piston pump, and when the piston is in the upward stroke, water is pumped to the high-level water tower.

[0081] The limit frame 5 can be designed in various geometric forms. Multiple limit frame support buoys 19 are symmetrically connected to the limit frame 5. The limit frame 5 is suspended in the sea by the buoyancy of the limit frame support buoys 19, the tension of multiple limit frame fixing cables 18 and multiple pile foundations 17. The total buoyancy of the limit frame support buoys 19 is much greater than the total weight of the limit frame 5. Multiple limit frame fixing cables 18 and multiple pile foundations 17 are symmetrically distributed, surrounding the piston pump in the middle. The limiter 7, the fixed guide mechanism 8, the piston cable seal 9, and the piston 13 are coaxial.

[0082] During offshore installation, the workboat first drives the pile foundation and installs various fixing chains; then the piston pump and the limit frame are towed to the installation location, placed in the underwater working position by a crane, the piston pump and the limit frame are installed with the fixing cable, tightened and adjusted to the horizontal height, and finally the supporting buoy is inflated and opened, and the reverse pulling force of the buoy and the fixing cable is used to suspend and fix the underwater device in the working position in the water.

[0083] The present invention also provides a method for a water tower type wave energy power generation device, comprising the following steps:

[0084] Step 1, when the power take-off buoy 3 sinks, the piston lifting traction rope 6 sags, the piston 13 moves downward under its own gravity, the one-way water inlet valve 22 at the bottom of the piston 13 opens, and seawater enters the upper chamber 14 of the piston pump through the one-way water inlet valve 22 to achieve water inlet;

[0085] When the power take-off buoy 3 floats up, the piston lifting traction rope 6 is tightened, thereby pulling the piston 13 upward; when the piston 13 moves upward, it squeezes the seawater in the upper chamber 14 of the piston pump, thereby causing the seawater in the upper chamber 14 of the piston pump to be lifted to the high-level water tower 1 through the one-way water outlet valve 23 and the lifting water pipe 21;

[0086] Wherein, the horizontal movement of the piston lifting and pulling rope 6 is limited by the limiter 7 installed on the limit frame 5;

[0087] Step 2, the seawater in the high-level water tower 1 is introduced into the hydro-generator set 2 through the water diversion pipe 20, and then the high-potential energy water body is introduced into the hydro-generator set 2 for power generation;

[0088] Therefore, the power take-off buoy 3 moves up and down and left and right by the waves, and the left and right lateral displacement is adjusted to up and down displacement by the limiter 7, thereby driving the piston 13 to move up and down, lifting seawater into the high-level water tower 1, and generating electricity.

[0089] Also includes:

[0090] A maximum tension safety disconnect lock 24 is provided on the piston lifting traction rope 6 to ensure that when the maximum design tension is reached, the maximum tension safety disconnect lock 24 is disconnected to protect the underwater device, so that the power take-off buoy 3 is pulled by the power take-off buoy safety standby rope 25 to float freely.

[0091] The present invention provides a method for utilizing wave lifting to push a power taking buoy, the power taking buoy tows a piston lifting traction rope, drives the piston of an underwater piston pump to move up and down, lifts seawater to a high-level water tower, and drives a hydro-generator set to generate electricity by descending the high-level water flow.

[0092] The water tower wave energy power generation device provided by the present invention mainly comprises:

[0093] 1. Large underwater piston pump. The large underwater piston pump is suspended and fixed below the sea level through a buoy set outside the piston pump body and a connecting steel cable fixed on the seabed pile foundation.

[0094] Large piston pumps are cylindrical, sealed at the top, with a piston in the middle, an opening at the bottom connected to the sea or closed to the atmosphere, a water outlet at the top connected to a high-level water tower, and a water inlet that can be designed at the top or directly at the bottom;

[0095] 2. Large power take-off buoy

[0096] The power take-off buoy is connected to the piston of the piston pump through a rope, passing through the top of the piston pump, and is driven by the waves to achieve up and down movement;

[0097] 3. Limiting frame.

[0098] The limit frame is suspended and fixed below the sea level through buoys installed on the frame and connecting steel cables fixed on the seabed pile foundation.

[0099] 4. High-level water tower.

[0100] The water inlet of the high-level water tower is connected to the outlet of the underwater piston pump. The high-level water tower is provided with a water outlet and a water diversion pipe, and hydraulic potential energy is used to drive the hydro-turbine generator set to generate electricity.

[0101] 5. Hydro-turbine generator set.

[0102] The method of the present invention sets the energy collection device in the underwater still water area, and can collect small waves or large waves by changing the stroke of the piston pump. The underwater setting of the present invention avoids the influence of wind and waves, and the device is safe and stable. Traditional wave energy generation distributes the power generation device in each energy collection unit. The method of the present invention concentrates the dispersed wave energy through the water tower and then generates electricity, which increases the stability of power generation.

[0103] The water tower wave energy power generation device and method provided by the present invention have the following advantages:

[0104] (1) Most of the facilities are located in still waters below the sea surface, avoiding the impact of wind and waves and greatly enhancing safety and stability.

[0105] (2) The dispersed wave energy can be gathered through piston pumps and high-level water towers to achieve stable power generation;

[0106] (3) The suspended design of underwater facilities greatly reduces the difficulty of offshore construction.

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A water tower wave energy power generation device, characterized in that: include: Underwater piston unit, piston motion drive unit and high-position energy storage and power generation unit; The high-level energy storage power generation unit comprises a high-level water tower (1), a hydro-turbine generator set (2), a water diversion pipe (20) and a return pipe (12); the high-level water tower (1) introduces high-potential energy water in the high-level water tower (1) into the hydro-turbine generator set (2) through the water diversion pipe (20) to generate electricity, and the discharge end of the hydro-turbine generator set (2) is connected to the sea through the return pipe (12); The piston motion drive unit comprises a power take-off buoy (3); the power take-off buoy (3) floats on the water surface; The underwater piston unit comprises a piston pump cylinder (15), a piston pump support buoy (10) is sleeved on the outside of the piston pump cylinder (15), a plurality of piston pump fixing cables (16) are arranged on the outside of the piston pump cylinder (15), and the other ends of the piston pump fixing cables (16) are fixed to pile foundations (17) on the seabed, thereby making the piston pump cylinder (15) suspended and fixed in calm waters below the sea level; The piston pump cylinder (15) is a structure with an open bottom and a sealed top. A piston (13) is installed in the piston pump cylinder (15) in a liftable, sliding and sealed manner. The piston (13) divides the piston pump cylinder (15) into an upper piston pump chamber (14) and a lower piston pump chamber (4). The bottom of the lower piston pump chamber (4) is connected to the sea to form an open lower chamber. The piston (13) is provided with a one-way water inlet valve (22). The upper piston pump chamber (14) is connected to the high-level water tower (1) through a lifting water pipe (21). A one-way water outlet valve (23) is installed at one end of the lifting water pipe (21). The axis of the piston (13) is fixed to one end of a piston lifting and traction rope (6); the other end of the piston lifting and traction rope (6) is sealed and passed through the top cover of the piston pump cylinder (15), and then coaxially installed to the axis of the power take-off buoy (3); when the power take-off buoy (3) floats up or sinks, the piston (13) is driven to move up and down through the piston lifting and traction rope (6); The piston (13) is a conical counterweight design structure; It also includes a horizontal limiting unit; the horizontal limiting unit includes a limiting frame (5), a limiter (7), a limiting frame fixing rope (18) and a limiting frame supporting buoy (19); The limit frame (5) is coaxially arranged between the power take-off buoy (3) and the piston pump cylinder (15); a limit frame support buoy (19) is sleeved and installed on the outside of the limit frame (5); the outside of the limit frame (5) is fixed to one end of a limit frame fixing cable (18); the other end of the limit frame fixing cable (18) is fixed to a pile foundation (17), thereby making the limit frame (5) suspended and fixed in calm waters below the sea level; The limit frame (5) is provided with a limiter (7), the piston lifting and lowering traction rope (6) passes through the limiter (7), and the limiter (7) is used to limit the horizontal movement of the piston lifting and lowering traction rope (6); It also includes a safety protection unit; The safety protection unit comprises a maximum tension safety disconnection lock (24) and a power take-off buoy safety backup rope (25); The outside of the power take-off buoy (3) is fixed to the pile foundation (17) via a power take-off buoy safety standby rope (25); The piston lifting and lowering traction rope (6) is provided with a maximum pulling force safety disconnection lock (24).

2. The water tower wave energy power generation device according to claim 1, characterized in that: The outer periphery of the piston (13) forms a sliding sealing structure with the inner wall of the piston pump cylinder (15) through a piston seal (11).

3. The water tower wave energy power generation device according to claim 1, characterized in that: A piston cable seal (9) and a fixing guide mechanism (8) are provided at the axial center position of the top sealing cover of the piston lifting and lowering traction cable (6) and the piston pump cylinder (15).

4. A method for a water tower wave energy power generation device according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1, when the power take-off buoy (3) sinks, the piston lifting and lowering traction rope (6) sags, the piston (13) moves downward under the action of its own gravity, the one-way water inlet valve (22) at the bottom of the piston (13) opens, and seawater enters the upper chamber (14) of the piston pump through the one-way water inlet valve (22), thereby achieving water intake; When the power take-off buoy (3) floats upward, the piston lifting traction rope (6) is tightened, thereby pulling the piston (13) upward; when the piston (13) moves upward, it squeezes the seawater in the upper chamber (14) of the piston pump, thereby causing the seawater in the upper chamber (14) of the piston pump to be lifted to the high-level water tower (1) through the one-way water outlet valve (23) and the lifting water pipe (21); The horizontal movement of the piston lifting and pulling rope (6) is limited by a limiter (7) installed on the limit frame (5); Step 2: The seawater in the high-level water tower (1) is introduced into the hydro-generator set (2) through the water diversion pipe (20), thereby introducing the high-potential energy water body into the hydro-generator set (2) to generate electricity.

5. The method of the water tower wave energy power generation device according to claim 4, characterized in that: Also includes: A maximum tension safety disconnect lock (24) is provided on the piston lifting traction rope (6) to ensure that when the maximum design tension is reached, the maximum tension safety disconnect lock (24) is disconnected to protect the underwater device, so that the power take-off buoy (3) is towed by the power take-off buoy safety standby rope (25) to float freely.

Images