CN113847188A - Water tower type wave energy power generation device and method - Google Patents

Water tower type wave energy power generation device and method Download PDF

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Publication number
CN113847188A
CN113847188A CN202111247248.4A CN202111247248A CN113847188A CN 113847188 A CN113847188 A CN 113847188A CN 202111247248 A CN202111247248 A CN 202111247248A CN 113847188 A CN113847188 A CN 113847188A
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China
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piston
water
piston pump
buoy
water tower
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CN202111247248.4A
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Chinese (zh)
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李坤隆
张苓
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention provides a water tower type wave energy power generation device and a method, wherein the device comprises: the underwater piston unit, the piston motion driving unit and the high-level energy storage power generation unit; the high-level energy storage power generation unit comprises a high-level water tower, a water turbine generator set, a water conduit and a return conduit; the piston motion driving unit comprises a power take-off buoy; the underwater piston unit comprises a piston pump cylinder, a piston is arranged in the piston pump cylinder in a lifting sliding sealing mode, and the axis of the piston is fixed with one end of a piston lifting traction cable; the other end of the piston lifting traction cable penetrates through the top sealing cover of the piston pump cylinder body in a sealing mode and is coaxially installed on the axis of the power take-off buoy. Has the following advantages: (1) most facilities are arranged in a static water area below the sea surface, so that the influence of wind waves is avoided, and the safety and stability are greatly enhanced. (2) The dispersed wave energy is gathered through a piston pump and a high-level water tower, so that stable power generation can be realized; (3) the suspension design of the underwater facility greatly reduces the difficulty of offshore construction.

Description

Water tower type wave energy power generation device and method
Technical Field
The invention belongs to the technical field of wave energy power generation, and particularly relates to a water tower type wave energy power generation device and method.
Background
In the traditional wave energy power generation, an energy taking facility generally floats on the water surface, and the collected energy is only the wave fluctuation of the water surface; in addition, the traditional wave energy power generation is easily influenced by wind and waves, and the safety and stability of the device are poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a water tower type wave energy power generation device and a method, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a water tower type wave energy power generation device, which comprises: the underwater piston unit, the piston motion driving unit and the high-level energy storage power generation unit;
the high-level energy storage power generation unit comprises a high-level water tower (1), a water turbine generator set (2), a water conduit (20) and a return conduit (12); the high-level water tower (1) introduces high-potential water in the high-level water tower (1) into the water turbine generator set (2) through the water conduit (20) to generate electricity, and the water discharging end of the water turbine generator set (2) is communicated with the sea body through the return pipe (12);
the piston movement 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 supporting buoy (10) is sleeved outside the piston pump cylinder (15), a plurality of piston pump fixing cables (16) are arranged outside the piston pump cylinder (15), the other ends of the piston pump fixing cables (16) are fixed to a pile foundation (17) of a seabed, and the piston pump cylinder (15) is suspended and fixed in a flat water area below the sea level;
the piston pump cylinder (15) is of a structure with an opening at the bottom and a sealed top; a piston (13) is arranged in the piston pump cylinder (15) in a lifting sliding sealing manner, and the piston pump cylinder (15) is divided into a piston pump upper cavity (14) and a piston pump lower cavity (4) through the piston (13); the bottom of the lower cavity (4) of the piston pump is communicated with the sea to form an open lower cavity; the piston (13) is provided with a one-way water inlet valve (22), and the upper cavity (14) of the piston pump is communicated with the high-level water tower (1) through a lifting water pipe (21); a one-way water outlet valve (23) is arranged at one end of the lifting water pipe (21);
the axis of the piston (13) is fixed with one end of the piston lifting traction cable (6); the other end of the piston lifting traction cable (6) penetrates through a top sealing cover of the piston pump cylinder (15) in a sealing mode and is coaxially mounted on the axis of the power take-off buoy (3); when the power take-off buoy (3) floats upwards or sinks, the piston (13) is driven to move up and down by the piston lifting traction cable (6).
Preferably, the periphery of the piston (13) forms a sliding sealing structure with the inner wall of the piston pump cylinder (15) through a piston sealing piece (11).
Preferably, a piston cable sealing piece (9) and a fixed guide mechanism (8) are arranged at the axial center positions of the piston lifting traction cable (6) and a top sealing cover of the piston pump cylinder (15).
Preferably, the piston (13) is of conical-weighted design.
Preferably, the device also comprises a horizontal limiting unit; the horizontal limiting unit comprises a limiting frame (5), a limiter (7), a limiting frame fixing cable (18) and a limiting frame supporting buoy (19);
the limiting frame (5) is coaxially arranged between the power take-off buoy (3) and the piston pump cylinder body (15), a limiting frame supporting buoy (19) is sleeved outside the limiting frame (5), the outside of the limiting frame (5) is fixed with one end of a limiting frame fixing cable (18), the other end of the limiting frame fixing cable (18) is fixed to a pile foundation (17), and the limiting frame (5) is suspended and fixed in a horizontal water area below the sea level;
the limiting frame (5) is provided with a limiter (7), the piston lifting traction cable (6) penetrates through the limiter (7), and the limiter (7) is used for limiting the horizontal movement of the piston lifting traction cable (6).
Preferably, the safety protection device further comprises a safety protection unit;
the safety protection unit comprises a maximum tension safety breaking lock (24) and a power take-off buoy safety standby cable (25);
the outside of the power take-off buoy (3) is fixed with the pile foundation (17) through a power take-off buoy safety standby cable (25);
the piston lifting traction cable (6) is provided with a maximum pulling force safety breaking lock (24).
The invention also provides a method of the water tower type wave energy power generation device, which comprises the following steps:
step 1, when a power take-off buoy (3) sinks, a piston lifting traction cable (6) is loosened, a piston (13) moves downwards under the action of self gravity, a one-way water inlet valve (22) at the bottom of the piston (13) is opened, and seawater enters an upper cavity (14) of a piston pump through the one-way water inlet valve (22) to realize water inlet;
when the power take-off buoy (3) floats upwards, the piston lifting traction cable (6) is tightened, and then the piston (13) is pulled to move upwards; when the piston (13) moves upwards, the seawater in the upper cavity (14) of the piston pump is extruded, and then the seawater in the upper cavity (14) of the piston pump is lifted to the high-level water tower (1) through the one-way water outlet valve (23) and the lifting water pipe (21);
wherein, the horizontal movement of the piston lifting traction cable (6) is limited by a limiter (7) arranged on the limiting frame (5);
step 2, introducing seawater in the high-level water tower (1) into the water-turbine generator set (2) through a water conduit (20), and further introducing a high-potential water body into the water-turbine generator set (2) for power generation;
therefore, the power take-off buoy (3) moves up and down and left and right through waves, the left and right transverse displacement is adjusted to be up and down displacement through the limiter (7), and then the piston (13) is driven to move up and down, seawater is lifted into the high-level water tower (1), and power is generated.
Preferably, the method further comprises the following steps:
the piston lifting traction cable (6) is provided with a maximum pulling force safety break unlocking (24) so as to ensure that the maximum pulling force safety break unlocking (24) is broken when the maximum design pulling force is reached, and an underwater device is protected, so that the power take-off buoy (3) is pulled by the power take-off buoy safety standby cable (25) to float freely.
The water tower type wave energy power generation device and the method provided by the invention have the following advantages:
(1) most facilities are arranged in a static water area below the sea surface, so that the influence of wind waves is avoided, and the safety and stability are greatly enhanced.
(2) The dispersed wave energy is gathered through a piston pump and a high-level water tower, so that stable power generation can be realized;
(3) the suspension design of the underwater facility greatly reduces the difficulty of offshore construction.
Drawings
Fig. 1 is a schematic structural diagram of a water tower type wave energy power generation device provided by the invention.
Wherein:
1-a high level water tower; 2-a water turbine generator set; 3-a power take-off buoy; 4-piston pump lower chamber; 5-a limit frame; 6-piston lifting traction cable; 7-a stopper; 8-fixing a guide mechanism; 9-piston cable seal; 10-piston pump support buoy; 11-piston seal; 12-a return pipe; 13-a piston; 14-piston pump upper chamber; 15-piston pump cylinder; 16-piston pump fixed cable; 17-pile foundation; 18-a spacing frame fixing cable; 19-limit frame support buoy; 20-a water conduit; 21-lifting a water pipe; 22-one-way water inlet valve; 23-one-way water outlet valve; 24-maximum pulling force safe breaking lock; 25-safe standby cable of power take-off buoy.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention belongs to the field of wave power generation, and particularly relates to a method for lifting seawater onto a high-level water tower by driving a piston of a piston pump to move up and down through the action of sea waves on a power takeoff buoy and driving a water turbine to generate power by utilizing the potential energy of water level fall.
The energy-taking device is arranged in an underwater still water area, and can collect small waves and large waves by changing the stroke of the piston pump. The underwater device avoids the influence of wind waves and is safe and stable. According to the traditional wave energy power generation, the power generation device is distributed on each energy taking unit, and the method concentrates the dispersed wave energy through a high-level water tower and then generates power, so that the power generation stability is improved.
The invention provides a water tower type wave energy power generation device, which comprises the following components in part by weight with reference to fig. 1: the underwater piston unit, the piston motion driving unit and the high-level energy storage power generation unit;
the high-level energy storage power generation unit comprises a high-level water tower 1, a water turbine generator set 2, a water conduit 20 and a return conduit 12; the high-level water tower 1 leads high-potential water in the high-level water tower 1 into the water turbine generator set 2 through the water conduit 20 for power generation, and the water discharge end of the water turbine generator set 2 is communicated with the sea body through the return pipe 12;
the piston motion driving 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 body 15, a piston pump supporting buoy 10 is sleeved outside the piston pump cylinder body 15, a plurality of piston pump fixing cables 16 are arranged outside the piston pump cylinder body 15, the other ends of the piston pump fixing cables 16 are fixed on a pile foundation 17 of a seabed, and therefore the piston pump cylinder body 15 is suspended and fixed in a flat water area below the sea level;
the piston pump cylinder 15 is of a structure with an opening at the bottom and a sealed top; a piston 13 is arranged in the piston pump cylinder 15 in a lifting sliding sealing mode, and the piston pump cylinder 15 is divided into a piston pump upper cavity 14 and a piston pump lower cavity 4 through the piston 13; the outer periphery of the piston 13 forms a sliding seal structure with the inner wall of the piston pump cylinder 15 through the piston seal 11.
Wherein, the bottom of the lower cavity 4 of the piston pump is communicated with the sea to form an open lower cavity; the piston 13 is provided with a one-way water inlet valve 22, and the upper cavity 14 of the piston pump is communicated with the high-level water tower 1 through a lifting water pipe 21; one end of the lifting water pipe 21 is provided with a one-way water outlet valve 23;
the axis of the piston 13 is fixed with one end of the piston lifting traction cable 6; the other end of the piston lifting traction cable 6 is coaxially arranged on the axis of the power take-off buoy 3 after passing through the top sealing cover of the piston pump cylinder 15 in a sealing way; wherein, a piston cable sealing element 9 and a fixed guiding mechanism 8 are arranged at the axis position of the top sealing cover of the piston lifting traction cable 6 and the piston pump cylinder 15.
When the power take-off buoy 3 floats upwards or sinks, the piston lifts the traction cable 6 to drive the piston 13 to move up and down.
In the present invention, the piston 13 is a conical weight design.
The device also comprises a horizontal limiting unit; the horizontal limiting unit comprises a limiting frame 5, a limiter 7, a limiting frame fixing cable 18 and a limiting frame supporting buoy 19;
the limiting frame 5 is coaxially arranged between the power take-off buoy 3 and the piston pump cylinder 15, the limiting frame supporting buoy 19 is sleeved and installed outside the limiting frame 5, the outside of the limiting frame 5 is fixed with one end of a limiting frame fixing cable 18, the other end of the limiting frame fixing cable 18 is fixed to the pile foundation 17, and therefore the limiting frame 5 is suspended and fixed in a flat water area below the sea level;
the limiting frame 5 is provided with a limiter 7, the piston lifting traction cable 6 penetrates through the limiter 7, and the limiter 7 is used for limiting the horizontal movement of the piston lifting traction cable 6.
The system also comprises a safety protection unit;
the safety protection unit comprises a maximum tension safety breaking lock 24 and a power take-off buoy safety standby cable 25;
the outside of the power take-off buoy 3 is fixed with the pile foundation 17 through a power take-off buoy safe standby cable 25;
the piston lifting traction cable 6 is provided with a maximum pulling force safety breaking lock 24.
One specific embodiment is described below:
the invention comprises 5 main components:
high-level water tower
High-level water tower 1: the water flow lifted by the plurality of underwater piston pumps is gathered through the high-level water tower 1 to form a large amount of hydraulic potential energy storage;
(II) water turbine generator set
The water turbine generator set 2: water in the high-level water tower 1 is led into the water-turbine generator set 2 through a water conduit 20 arranged in the high-level water tower 1, and the water-turbine generator set 2 is driven to generate electricity;
(III) underwater piston pump
The underwater piston pump comprises a piston pump cylinder 15 and a piston 13.
The outside of the piston pump cylinder body 15 is suspended and fixed in a static water area below the sea level through the combined action of the plurality of piston pump supporting buoys 10, the plurality of piston pump fixing cables 16 and the pile foundation 17;
the piston 13 is driven by the power take-off buoy 3 to move up and down through the piston lifting traction cable 6 of the shaft center, and pumps the seawater into the high-level water tower 1.
(IV) spacing frame 5
The limiting frame 5 is suspended and fixed in a still water area below the sea level under the combined action of the limiting frame supporting buoy 19, the limiting frame fixing cable 18 and the pile foundation 17;
a limiter 7 is arranged in the middle of the limiting frame 5, the piston lifting traction cable 6 penetrates through the limiter 7, and the limiter 7 controls the transverse displacement of the piston lifting traction cable 6;
the limiting frame 5 is provided with a plurality of limiting frame fixing cables 18 and a plurality of pile foundations 17 so as to enhance the strength of the limiting device 7 for resisting the transverse displacement of the piston lifting traction cable 6. The limiter 7 is arranged between the piston pump cylinder 15 and the power take-off buoy 3, and the axial position of the piston pump cylinder 15 is determined.
(V) power take-off buoy 3
The power take-off buoy 3 is connected with a piston lifting traction cable 6, and the piston lifting traction cable 6 is connected with a piston 13.
The power take-off buoy 3, the piston lifting traction cable 6, the piston pump cylinder 15 and the piston 13 are in the same axial direction.
The power take-off buoy 3 moves up and down and left and right through waves, the left and right transverse displacement is adjusted to be up and down displacement through the limiter 7, the piston 13 is driven to move up and down, and the seawater is lifted to the high-level water tower 1.
In practical application, the power take-off buoy 3 is a hollow sphere or a sphere made of light materials, can also be in an olive shape, and can float on the water surface. The power taking buoy 3 is connected with the piston lifting traction cable 6, the piston lifting traction cable 6 is connected with the piston 13, the power taking buoy 3 is independently connected with the power taking buoy safety standby cable 25, when the piston lifting traction cable 6 reaches the maximum design tension, the maximum tension safely breaks the lock 24 to be disconnected, and the power taking buoy safety standby cable 25 pulls the power taking buoy 3 to float freely. The buoyancy of the power take-off buoy 3 is much larger than the weight of the piston 13 and the frictional resistance of the piston lifting traction cable 6.
In the invention, the piston pump supporting buoy 10, the piston pump fixing cable 16 and the pile foundation 17 are arranged outside the piston pump cylinder 15 and are suspended and fixed in a flat water area below the sea level. A piston 13 is arranged in a piston pump cylinder 15, a one-way water inlet valve 22 is arranged on the piston 13, the piston 13 is connected with a power take-off buoy 3 through a piston lifting traction cable 6, a plurality of piston slide rails are arranged on the inner wall of the piston pump cylinder 15 to facilitate the sliding of the piston, a piston sealing element 11 is arranged on the piston 13 to form sliding sealing with the inner wall of the piston pump cylinder 15, and a piston cable sealing element 9 and a fixed guide mechanism 8 are arranged at the axis positions of a sealing cover on the top of the piston lifting traction cable 6 and the piston pump cylinder 15.
The shell of the piston pump barrel 15 is cylindrical, the bottom of the piston pump barrel is communicated with the sea to form an open piston pump lower cavity 4, when the power taking buoy 3 sinks, the piston lifting traction rope 6 is loosened, the piston 13 moves downwards under the action of self gravity, the conical piston 13 is designed to help to reduce the falling resistance, the one-way water inlet valve 22 at the bottom of the piston 13 is opened, and water enters the piston pump barrel 15; the top of the piston pump cylinder 15 is sealed with a one-way water outlet valve 23 communicated with the high-level water tower 1, when the power take-off buoy 3 floats upwards, the piston lifting traction cable 6 is tightened, the piston 13 moves upwards, and seawater in the upper cavity 14 of the piston pump is extruded to lift the high-level water tower 1. The piston 13 in the cylinder 15 of the piston pump is designed as a conical balance weight, and the weight of the piston 13 is far larger than the descending hydraulic resistance and the friction resistance of the piston lifting traction cable 6. Under the condition of a quiet sea, the piston 13 is positioned in the middle of the cavity of the piston pump, and the maximum stroke of the cylinder body 15 of the piston pump is larger than the maximum design wave height.
Spacing frame support flotation pontoon 19 is installed to spacing frame 5 last, spacing frame 5 connects spacing frame fixed cable 18 and pile foundation 17, the suspension is fixed in the below-sea level still water area, spacing frame 5 installation stopper 7 for the horizontal motion of restriction piston lift haulage cable 6, set up the safe absolutely 24 of unblanking of maximum pulling force on the piston lift haulage cable 6, when reaching the maximum design pulling force with the guarantee, break 24 disconnection of unblanking of maximum pulling force safety absolutely, protect the underwater installation, let power takeoff flotation pontoon 3 draw free drift by power takeoff flotation pontoon safe reserve cable 25.
The high-level water tower 1 is connected with a 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 conduit 20, and high-potential water is introduced into the water turbine generator set 2 to generate power.
The water tower type wave energy power generation device is characterized in that a unit for collecting wave energy is formed by the power take-off buoy 3, the piston pump cylinder 15 and the limiting frame 5, a plurality of units for collecting wave energy collect water to the high-level water tower, so that dispersed wave energy is collected, and then the power generator set forms electric energy which is stably output.
In the invention, the piston pump is suspended in a static water area below the sea surface, and the piston stroke of the piston pump is larger than the designed maximum wave height. The outside of the piston pump shell is symmetrically provided with a plurality of piston pump supporting buoys 10, one or a plurality of one-way water inlet valves 22 and one or a plurality of one-way water outlet valves 23.
The piston pump cylinder 15 is cylindrical, i.e. it can be designed as a cylindrical housing with a closed top and an open bottom, as mentioned above, or as a cylindrical housing with an upper and a lower closed ends. The piston pump lower cavity is fully filled with air and is fully sealed, and is connected with an air pipe and is connected with the atmosphere above the sea level through the air pipe; the one-way water inlet and outlet and the water inlet and outlet valve are both arranged on the shell of the upper cavity area of the piston pump, water enters the upper cavity of the piston pump when the piston moves downwards, and water is pumped to the high-level water tower when the piston moves upwards.
The limiting frame 5 can be designed into various geometric forms, a plurality of limiting frame supporting buoys 19 are symmetrically connected to the limiting frame 5, and the limiting frame 5 is suspended in the sea by means of buoyancy of the limiting frame supporting buoys 19, a plurality of limiting frame fixing cables 18 and pulling force of a plurality of pile foundations 17. The total buoyancy of the curb frame support buoys 19 is much greater than the total weight of the curb frame 5. A plurality of spacing frame fixed cables 18 and a plurality of pile foundations 17 are symmetrically distributed, enclose 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.
When the offshore installation is carried out, a working ship firstly plays a pile foundation and is provided with various fixed chain links; then the piston pump and the limiting frame are dragged to the installation position, the piston pump and the limiting frame are placed to the underwater working position by a crane, the piston pump and the limiting frame are provided with a fixed cable, the horizontal height is tensioned and adjusted, finally the supporting buoy is inflated and opened, and the underwater device is suspended and fixed at the underwater working position by utilizing the reverse tension of the buoy and the fixed cable.
The invention also provides a method of the water tower type wave energy power generation device, which comprises the following steps:
step 1, when the power take-off buoy 3 sinks, the piston lifting traction cable 6 is loosened, the piston 13 moves downwards under the action of self gravity, a one-way water inlet valve 22 at the bottom of the piston 13 is opened, and seawater enters the upper cavity 14 of the piston pump through the one-way water inlet valve 22 to realize water inlet;
when the power take-off buoy 3 floats upwards, the piston lifting traction cable 6 is tightened, and then the piston 13 is pulled to move upwards; when the piston 13 moves upwards, the seawater in the upper chamber 14 of the piston pump is extruded, and then the seawater in the upper chamber 14 of the piston pump is lifted to the high-level water tower 1 through the one-way water outlet valve 23 and the lifting water pipe 21;
wherein, the horizontal movement of the piston lifting traction cable 6 is limited by a limiter 7 arranged on the limiting frame 5;
step 2, introducing seawater in the high-level water tower 1 into the water-turbine generator set 2 through a water conduit 20, and further introducing a high-potential water body into the water-turbine generator set 2 to generate electricity;
therefore, the power take-off buoy 3 moves up and down and left and right through waves, the left and right transverse displacement is adjusted to be up and down displacement through the limiter 7, and then the piston 13 is driven to move up and down, the seawater is lifted into the high-level water tower 1, and power is generated.
Further comprising:
the piston lifting traction cable 6 is provided with a maximum pulling force safety break-off lock 24 so as to ensure that the maximum pulling force safety break-off lock 24 is broken when the maximum design pulling force is reached, and an underwater device is protected, so that the power take-off buoy 3 is pulled by the power take-off buoy safety standby cable 25 to float freely.
The invention provides a method for driving a power take-off buoy to lift by waves, driving a piston of an underwater piston pump to move up and down by a piston lifting traction cable pulled by the power take-off buoy, lifting seawater to a high-level water tower, and driving a water turbine generator set to generate power by descending high-level water flow.
The invention provides a water tower type wave energy power generation device, which mainly comprises:
1. an underwater large piston pump. The large underwater piston pump is suspended and fixed below the sea level through a floating barrel arranged outside the piston pump body and a connecting steel cable fixed on a seabed pile foundation.
The large piston pump is cylindrical, the upper part is sealed, a piston is arranged in the middle, the bottom opening is communicated with the sea or closed to the atmosphere, the upper part is provided with a water outlet communicated with a high-level water tower, and a water inlet can be designed at the top or directly enters water at the bottom;
2. large-scale power takeoff buoy
The power take-off buoy is connected with a piston of the piston pump by a rope through the upper top of the piston pump, and moves up and down under the driving of sea waves;
3. and a limiting frame.
The limit frame is suspended and fixed below the sea level through a floating barrel arranged on the frame and a connecting steel cable fixed on a seabed pile foundation.
4. A high-level water tower.
The water inlet of the high-level water tower is communicated with the outlet of the underwater piston pump, the high-level water tower is provided with a water outlet and a water conduit, and the hydraulic potential energy is utilized to drive the water turbine generator set to generate power.
5. A water turbine generator set.
According to the method, the energy taking device is arranged in the underwater still water area, and small waves and large waves can be collected through the change of the stroke of the piston pump. The underwater installation of the invention avoids the influence of wind waves, and the device is safe and stable. According to the method, dispersed wave energy is collected through a water tower and then power generation is carried out, so that the stability of power generation is improved.
The water tower type wave energy power generation device and the method provided by the invention have the following advantages:
(1) most facilities are arranged in a static water area below the sea surface, so that the influence of wind waves is avoided, and the safety and stability are greatly enhanced.
(2) The dispersed wave energy is gathered through a piston pump and a high-level water tower, so that stable power generation can be realized;
(3) the suspension design of the underwater facility greatly reduces the difficulty of offshore construction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.

Claims (8)

1. A water tower type wave energy power generation device is characterized by comprising: the underwater piston unit, the piston motion driving unit and the high-level energy storage power generation unit;
the high-level energy storage power generation unit comprises a high-level water tower (1), a water turbine generator set (2), a water conduit (20) and a return conduit (12); the high-level water tower (1) introduces high-potential water in the high-level water tower (1) into the water turbine generator set (2) through the water conduit (20) to generate electricity, and the water discharging end of the water turbine generator set (2) is communicated with the sea body through the return pipe (12);
the piston movement 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 supporting buoy (10) is sleeved outside the piston pump cylinder (15), a plurality of piston pump fixing cables (16) are arranged outside the piston pump cylinder (15), the other ends of the piston pump fixing cables (16) are fixed to a pile foundation (17) of a seabed, and the piston pump cylinder (15) is suspended and fixed in a flat water area below the sea level;
the piston pump cylinder (15) is of a structure with an opening at the bottom and a sealed top; a piston (13) is arranged in the piston pump cylinder (15) in a lifting sliding sealing manner, and the piston pump cylinder (15) is divided into a piston pump upper cavity (14) and a piston pump lower cavity (4) through the piston (13); the bottom of the lower cavity (4) of the piston pump is communicated with the sea to form an open lower cavity; the piston (13) is provided with a one-way water inlet valve (22), and the upper cavity (14) of the piston pump is communicated with the high-level water tower (1) through a lifting water pipe (21); a one-way water outlet valve (23) is arranged at one end of the lifting water pipe (21);
the axis of the piston (13) is fixed with one end of the piston lifting traction cable (6); the other end of the piston lifting traction cable (6) penetrates through a top sealing cover of the piston pump cylinder (15) in a sealing mode and is coaxially mounted on the axis of the power take-off buoy (3); when the power take-off buoy (3) floats upwards or sinks, the piston (13) is driven to move up and down by the piston lifting traction cable (6).
2. A water tower wave energy power plant according to claim 1, characterized in that the outer periphery of the piston (13) forms a sliding seal with the inner wall of the piston pump cylinder (15) through a piston seal (11).
3. The water tower type wave energy power generation device according to claim 1, wherein a piston cable sealing piece (9) and a fixed guiding mechanism (8) are arranged at the axial positions of the piston lifting traction cable (6) and a top cover of the piston pump cylinder (15).
4. The water tower wave energy power generation device of claim 1, characterized in that the piston (13) is a conical counterweight design.
5. The water tower type wave energy power generation device according to claim 1, further comprising a horizontal limiting unit; the horizontal limiting unit comprises a limiting frame (5), a limiter (7), a limiting frame fixing cable (18) and a limiting frame supporting buoy (19);
the limiting frame (5) is coaxially arranged between the power take-off buoy (3) and the piston pump cylinder body (15), a limiting frame supporting buoy (19) is sleeved outside the limiting frame (5), the outside of the limiting frame (5) is fixed with one end of a limiting frame fixing cable (18), the other end of the limiting frame fixing cable (18) is fixed to a pile foundation (17), and the limiting frame (5) is suspended and fixed in a horizontal water area below the sea level;
the limiting frame (5) is provided with a limiter (7), the piston lifting traction cable (6) penetrates through the limiter (7), and the limiter (7) is used for limiting the horizontal movement of the piston lifting traction cable (6).
6. The water tower wave energy power generation device of claim 5, further comprising a safety protection unit;
the safety protection unit comprises a maximum tension safety breaking lock (24) and a power take-off buoy safety standby cable (25);
the outside of the power take-off buoy (3) is fixed with the pile foundation (17) through a power take-off buoy safety standby cable (25);
the piston lifting traction cable (6) is provided with a maximum pulling force safety breaking lock (24).
7. A method of water tower wave energy generation according to any one of claims 1 to 6, comprising the steps of:
step 1, when a power take-off buoy (3) sinks, a piston lifting traction cable (6) is loosened, a piston (13) moves downwards under the action of self gravity, a one-way water inlet valve (22) at the bottom of the piston (13) is opened, and seawater enters an upper cavity (14) of a piston pump through the one-way water inlet valve (22) to realize water inlet;
when the power take-off buoy (3) floats upwards, the piston lifting traction cable (6) is tightened, and then the piston (13) is pulled to move upwards; when the piston (13) moves upwards, the seawater in the upper cavity (14) of the piston pump is extruded, and then the seawater in the upper cavity (14) of the piston pump is lifted to the high-level water tower (1) through the one-way water outlet valve (23) and the lifting water pipe (21);
wherein, the horizontal movement of the piston lifting traction cable (6) is limited by a limiter (7) arranged on the limiting frame (5);
step 2, introducing seawater in the high-level water tower (1) into the water-turbine generator set (2) through a water conduit (20), and further introducing a high-potential water body into the water-turbine generator set (2) for power generation;
therefore, the power take-off buoy (3) moves up and down and left and right through waves, the left and right transverse displacement is adjusted to be up and down displacement through the limiter (7), and then the piston (13) is driven to move up and down, seawater is lifted into the high-level water tower (1), and power is generated.
8. The method of a water tower wave energy power plant of claim 7, further comprising:
the piston lifting traction cable (6) is provided with a maximum pulling force safety break unlocking (24) so as to ensure that the maximum pulling force safety break unlocking (24) is broken when the maximum design pulling force is reached, and an underwater device is protected, so that the power take-off buoy (3) is pulled by the power take-off buoy safety standby cable (25) to float freely.
CN202111247248.4A 2021-10-26 2021-10-26 Water tower type wave energy power generation device and method Pending CN113847188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111247248.4A CN113847188A (en) 2021-10-26 2021-10-26 Water tower type wave energy power generation device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111247248.4A CN113847188A (en) 2021-10-26 2021-10-26 Water tower type wave energy power generation device and method

Publications (1)

Publication Number Publication Date
CN113847188A true CN113847188A (en) 2021-12-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111247248.4A Pending CN113847188A (en) 2021-10-26 2021-10-26 Water tower type wave energy power generation device and method

Country Status (1)

Country Link
CN (1) CN113847188A (en)

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