Gravity power generation energy storage device and energy storage method thereof

Abstract

The invention provides a gravity power generation and energy storage device and an energy storage method thereof, and relates to the technical field of energy storage and power generation. According to the gravity power generation and energy storage device and the energy storage method thereof, the water tank, the tower drum, the power generation mechanism, the energy storage mechanism, the vibration reduction mechanism and the conveying mechanism are designed, and energy storage balancing weights fixed together through a connecting rope can ascend to store energy under the buoyancy of water and the tension generated by falling of the previous energy storage balancing weight; in the falling process, the power generator generates power through cooperation of the abutting block, the synchronous belt and the driving wheel and the driven wheel, the loading and unloading process of heavy objects is not needed in the whole process, continuous power generation can be achieved by sequentially lifting and lowering the multiple heavy objects continuously, constant-speed and stable heavy object flow is formed, energy storage and power generation output are stable, and the power generation efficiency is improved. Impact on equipment and a generator is reduced to a great extent, output fluctuation of current and voltage in the system power generation process is effectively restrained, and large-scale energy storage of a power grid can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power generation, and in particular to a gravity power generation energy storage device and an energy storage method thereof. Background Art

[0002] Energy and environmental issues have become the main issues facing global sustainable development, and have increasingly attracted widespread attention from the international community and are seeking positive countermeasures. Renewable energy sources such as solar energy, wind energy, tidal energy, and gravitational potential energy are being widely used to generate electricity. The use of various energy sources to complete power generation has improved energy utilization and is conducive to energy conservation and environmental protection. However, the use of solar and wind energy for power generation is intermittent, so it is very necessary to store the discontinuous electricity generated by solar and wind energy and convert it into continuous and stable electricity when needed. At present, the most mature large-scale energy storage power generation method is pumped storage power stations, but the comprehensive efficiency of pumped storage power stations is generally 0.65 to 0.75. If the geological conditions are not good, the efficiency may be even lower. This means that nearly 1 / 3 of the electricity may be wasted.

[0003] At present, gravity energy storage power generation as a new power generation method has gradually come into people's view. The gravity energy storage system mainly consists of two parts: energy storage and discharge. When storing energy, the material (heavy block) is lifted from the low-altitude storage yard (lower warehouse) to the high-altitude storage yard (upper warehouse), and the electrical energy is finally converted into the gravitational potential energy of the material for temporary storage; when discharging, the material is transported from the high-altitude storage yard to the low-altitude storage yard, and the generator is driven by the transmission device to generate electricity, and the gravitational potential energy is finally converted into electrical energy. As a commercial and engineering power project, the success of the gravity energy storage project depends on whether it can provide continuous and stable current, which depends on the stability of the weight and speed of the lifting weight. As a new energy storage solution, gravity energy storage has no production cases in China. The heavy blocks are lifted and lowered separately, which makes it difficult to achieve continuous discharge. The system efficiency is low and it does not meet the conditions for commercial application. It is a major problem. In order to solve this problem, a gravity power generation energy storage device and its energy storage method are proposed.

[0004] To this end, we have developed a new gravity-powered energy storage device and its energy storage method. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a gravity power generation energy storage device and its energy storage method, which solves the problem that the success of gravity energy storage projects as commercial and engineering power projects in the prior art depends on whether they can provide continuous and stable current, which depends on the weight and speed stability of the lifting weight. As a new energy storage solution, gravity energy storage has no production cases in China. The weight blocks are lifted and lowered separately, which makes it difficult to achieve continuous discharge, and the system efficiency is low, which does not meet the conditions for commercial application.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A gravity power generation energy storage device and energy storage method thereof, comprising a water tank, one end of the upper surface of the water tank is fixedly connected to a tower, and a plurality of energy storage counterweights are placed inside the water tank and the tower, and a connecting rope is fixedly connected between the plurality of energy storage counterweights in sequence, and a first mounting rod and a second mounting rod are symmetrically fixedly connected to the other end of the upper surface of the water tank, respectively, and a power generation mechanism is installed on the front of the two first mounting rods and the two second mounting rods, and an energy storage mechanism is installed on one end of the two groups of the power generation mechanisms;

[0009] A conveying mechanism is installed at the bottom of the inner wall of the water tank, and the conveying mechanism includes conveying wheels rotatably connected to the two ends of the water tank respectively, and the outer surfaces of the two conveying wheels are jointly sleeved with a conveyor belt for transmission connection, and the outer surface of the conveyor belt is fixedly connected with a plurality of anti-slip strips;

[0010] A vibration damping mechanism is installed at the bottom of the side wall of the water tank, and the vibration damping mechanism includes a positioning plate fixedly connected to the side wall of the water tank, the positioning plate is located on the inner side of the conveyor belt, and a plurality of pressure springs are fixedly connected to the upper surface of the positioning plate, and one end of the plurality of pressure springs is commonly fixedly connected to a support plate.

[0011] Preferably, a clearance slot is provided on one side of the top of the tower, and an inclined plate is fixedly connected to one side of the outer surface of the tower corresponding to the position of the clearance slot.

[0012] Preferably, the power generation mechanism comprises two synchronous wheels, the outer surfaces of the two synchronous wheels are jointly sleeved with a synchronous belt meshingly connected thereto, and the outer surface of the synchronous belt is fixedly connected with a plurality of stops.

[0013] Preferably, the synchronous wheels of the power generating mechanism are rotatably connected to the front sides of the corresponding first mounting rod and the second mounting rod respectively, and a first connecting rod is commonly passed through and fixedly connected between the single synchronous wheels of the two power generating mechanisms corresponding to the two first mounting rods, and a second connecting rod is commonly passed through and fixedly connected between the single synchronous wheels of the two power generating mechanisms corresponding to the two second mounting rods.

[0014] Preferably, the energy storage mechanism includes a generator and a large turntable fixedly connected to the back of the water tank, the driving end of the generator is fixedly connected to a second transmission rod, one end of the second transmission rod is fixedly connected to a driven wheel, one side of the outer surface of the large turntable is rotatably connected to a driving wheel, and the outer surfaces of the driven wheel and the driving wheel are jointly sleeved with a belt for transmission connection.

[0015] Preferably, a single first mounting rod and a single second mounting rod are rotatably connected to a small turntable on the back side, the two small turntables are respectively fixedly connected to the synchronous wheels of the corresponding power generation mechanism, and a first transmission rod is fixedly connected to the axis of the two small turntables, and one end of the two first transmission rods are respectively penetrated and fixedly connected to the driving wheel of the corresponding energy storage mechanism.

[0016] Preferably, the distance between the two first mounting rods is greater than the distance between the two second mounting rods, and the length of the first connecting rod is greater than the length of the second connecting rod.

[0017] Preferably, a first through hole and a second through hole are respectively opened on the upper surface of the water tank, the first through hole is located at the connection between the tower and the water tank, and the second through hole is located in the middle of the two first mounting rods and the two second mounting rods.

[0018] A method for storing energy in a gravity power generation energy storage device comprises the following specific steps:

[0019] Step 1: Fill the water tank and the tower with water, and use the buoyancy to make the energy storage counterweight rise to the position of the clearance slot and slide out of the tower through the inclined plate;

[0020] Step 2: Then, when the energy storage counterweight block enters the frame structure composed of the two first mounting rods and the two second mounting rods, it will push the block downward under the action of gravity, so that the synchronous wheel can rotate, and drive the generator to generate electricity through the cooperation between the driving wheel and the driven wheel, thereby converting the gravitational potential energy into electrical energy.

[0021] (III) Beneficial effects

[0022] The present invention provides a gravity power generation energy storage device and an energy storage method thereof, which have the following beneficial effects:

[0023] The gravity power generation energy storage device and energy storage method thereof are designed with a water tank, a tower, a power generation mechanism, an energy storage mechanism, a vibration reduction mechanism and a transmission mechanism. The energy storage counterweight block fixed together by a connecting rope can rise to store energy under the buoyancy of water and the pulling force generated by the falling of the previous energy storage counterweight block. When falling, the generator generates electricity through the cooperation between the counterweight block and the synchronous belt as well as the driving wheel and the driven wheel. The whole process does not require the loading and unloading process of heavy objects, and can realize continuous lifting and lowering of multiple heavy objects in sequence to perform continuous power generation, forming a uniform and stable heavy flow, with stable energy storage and power generation output, greatly reducing the impact on equipment and generators, and effectively suppressing the output fluctuation of current and voltage during the power generation process of the system, so as to realize large-scale energy storage of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional perspective view of the present invention;

[0025] Figure 2 It is a front cross-sectional view of the present invention;

[0026] Figure 3 It is a schematic diagram of the installation structure of the first installation rod and the second installation rod of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the vibration reduction mechanism of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection structure between the generator and the driving wheel of the present invention.

[0029] Among them, 1. water tank; 2. tower; 3. give way slot; 4. inclined plate; 5. transmission mechanism; 501. conveyor belt; 502. transmission wheel; 503. anti-skid strip; 6. vibration reduction mechanism; 601. support plate; 602. pressure spring; 603. positioning plate; 7. first through hole; 8. second through hole; 9. energy storage counterweight; 10. connecting rope; 11. first mounting rod; 12. second mounting rod; 13. power generation mechanism; 1301. synchronous wheel; 1302. synchronous belt; 1303. block; 14. small turntable; 15. first transmission rod; 16. large turntable; 17. driving wheel; 18. driven wheel; 19. belt; 20. second transmission rod; 21. generator; 22. first connecting rod; 23. second connecting rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Examples, such as Figure 1 - Figure 5 As shown, an embodiment of the present invention provides a gravity power generation energy storage device and an energy storage method thereof, comprising a water tank 1, one end of the upper surface of the water tank 1 is fixedly connected to a tower 2, and a plurality of energy storage counterweights 9 are placed inside the water tank 1 and the tower 2, and a connecting rope 10 is fixedly connected between the plurality of energy storage counterweights 9 in sequence, and a first mounting rod 11 and a second mounting rod 12 are symmetrically fixedly connected to the other end of the upper surface of the water tank 1, respectively, and a power generation mechanism 13 is installed on the front of the two first mounting rods 11 and the two second mounting rods 12, and an energy storage mechanism is installed on one end of the two groups of power generation mechanisms 13;

[0032] The upper surface of the water tank 1 is provided with a first through hole 7 and a second through hole 8, respectively. The first through hole 7 is located at the connection between the tower 2 and the water tank 1, and the second through hole 8 is located in the middle of the two first mounting rods 11 and the two second mounting rods 12. The movement trajectory of the energy storage counterweight 9 is to float upward from the water tank 1 through the first through hole 7 to the tower 2, and then from the tower 2 through the power generation mechanism 13 between the first mounting rod 11 and the second mounting rod 12, and then re-enter the interior of the water tank 1 from the second through hole 8;

[0033] like Figure 2 As shown, a conveying mechanism 5 is installed at the bottom of the inner wall of the water tank 1, and the conveying mechanism 5 includes conveying wheels 502 rotatably connected to the two ends of the water tank 1 respectively (a servo motor connected to the conveying wheel 502 should be fixedly installed on the outside of the water tank 1 to drive the conveying wheel 502), and the outer surfaces of the two conveying wheels 502 are jointly sleeved with a conveyor belt 501 that is transmission-connected, and the outer surface of the conveyor belt 501 is fixedly connected with a plurality of anti-slip strips 503. When the conveyor belt 501 is conveying the energy storage counterweight block 9, the anti-slip strips 503 can prevent the energy storage counterweight block 9 from deflecting, thereby realizing stable transportation of the energy storage counterweight block 9;

[0034] like Figure 4 As shown, a vibration damping mechanism 6 is installed at the bottom of the side wall of the water tank 1, and the vibration damping mechanism 6 includes a positioning plate 603 fixedly connected to the side wall of the water tank 1, the positioning plate 603 is on the inner side of the conveyor belt 501, and a plurality of pressure springs 602 are fixedly connected to the upper surface of the positioning plate 603, and one end of the plurality of pressure springs 602 is commonly fixedly connected to a support plate 601, the positioning plate 603 is used to install the vibration damping mechanism 6 inside the water tank 1, and the pressure spring 602 is used to support the support plate 601, and the support plate 601 can support the conveyor belt 501 above, so as to reduce the buffering effect of the energy storage counterweight block 9 on the conveyor belt 501 when it falls (together with the water resistance when the energy storage counterweight block 9 falls and hits the water).

[0035] like Figure 1 and Figure 2 As shown, a clearance slot 3 is opened on one side of the top of the tower 2, and an inclined plate 4 is fixedly connected to one side of the outer surface of the tower 2 corresponding to the position of the clearance slot 3. The existence of the clearance slot 3 enables the energy storage counterweight block 9 to be smoothly moved out of the tower 2 and then displaced outward through the inclined plate 4.

[0036] like Figure 3 As shown, the power generation mechanism 13 includes two synchronous wheels 1301, and the outer surfaces of the two synchronous wheels 1301 are jointly sleeved with a synchronous belt 1302 in meshing connection, and the outer surface of the synchronous belt 1302 is fixedly connected with a plurality of abutment blocks 1303. When the energy storage counterweight block abuts against the abutment blocks 1303 and falls downward, the abutment blocks 1303 are driven to move downward, so that the synchronous belt 1302 starts to move, and then the two synchronous wheels 1301 are rotated, so as to generate electricity subsequently.

[0037] Correspondingly, the synchronous wheels 1301 of the plurality of power generation mechanisms 13 are rotatably connected to the front sides of the corresponding first mounting rods 11 and second mounting rods 12, and the first connecting rod 22 is fixedly connected to the single synchronous wheels 1301 of the two power generation mechanisms 13 corresponding to the two first mounting rods 11, and the second connecting rod 23 is fixedly connected to the single synchronous wheels 1301 of the two power generation mechanisms 13 corresponding to the two second mounting rods 12;

[0038] Correspondingly, the spacing between the two first mounting rods 11 is greater than the spacing between the two second mounting rods 12, and the length of the first connecting rod 22 is greater than the length of the second connecting rod 23, that is, the two first mounting rods 11 and the two second mounting rods 12 form an eight-shaped structure, so that the energy storage counterweight 9 can smoothly pass between the two first mounting rods 11, and then be blocked by the two second mounting rods 12, and stop, and be located between the two first mounting rods 11 and the two second mounting rods 12.

[0039] like Figure 5 As shown, the energy storage mechanism includes a generator 21 and a large turntable 16 fixedly connected to the back of the water tank 1, the driving end of the generator 21 is fixedly connected to the second transmission rod 20, one end of the second transmission rod 20 is fixedly connected to the driven wheel 18, one side of the outer surface of the large turntable 16 is rotatably connected to the driving wheel 17, and the outer surfaces of the driven wheel 18 and the driving wheel 17 are jointly sleeved with a belt 19 for transmission connection, and the rotation of the driving wheel 17 can drive the driven wheel 18 to rotate through the belt 19, thereby driving the generator 21 to generate electricity.

[0040] Correspondingly, the back sides of the single first mounting rod 11 and the single second mounting rod 12 are both rotatably connected with a small turntable 14, the two small turntables 14 are respectively fixedly connected to the synchronous wheels 1301 of the corresponding power generation mechanism 13, and the axis of the two small turntables 14 is fixedly connected with a first transmission rod 15, one end of the two first transmission rods 15 are respectively penetrated and fixedly connected with the driving wheel 17 of the corresponding energy storage mechanism. Through the linkage between the above-mentioned components, when the small turntable 14 rotates following the synchronous wheel 1301, the kinetic energy can be transmitted to the driving wheel 17 through the first transmission rod 15, and then transmitted to the driven wheel 18 through the belt 19, so that the generator 21 generates electricity, realizing the conversion between gravitational potential energy to kinetic energy and even electrical energy, and realizing gravitational potential energy power generation.

[0041] A method for storing energy in a gravity power generation energy storage device comprises the following specific steps:

[0042] Step 1: Assemble the water tank 1 and the tower 2 near the water, with the water tank 1 placed in the water and the tower 2 exposed to the water surface. The water level inside the tower 2 is always kept flush with the clearance slot 3 by means of an external water pump, and the energy storage counterweight 9 is raised to the position of the clearance slot 3 by means of buoyancy and slides out of the tower 2 through the inclined plate 4 (when the energy storage counterweight 9 falls downward, it will pull the subsequent energy storage counterweight 9 through the connecting rope 10, and this pulling force combined with the buoyancy enables the energy storage counterweight 9 to smoothly move upward to the top of the tower 2);

[0043] Step 2: Then, when the energy storage counterweight block 9 enters the frame structure composed of the two first mounting rods 11 and the two second mounting rods 12, it will push the block 1303 downward under the action of gravity, so that the synchronous wheel 1301 can rotate, and the kinetic energy is transmitted to the driving wheel 17 through the first transmission rod 15, driving the small turntable 14 to rotate with the synchronous wheel 1301, and through the cooperation between the driving wheel 17 and the driven wheel 18, the kinetic energy is further transmitted to the driven wheel 18 through the belt 19, so that the generator 21 generates electricity, realizing the conversion of gravitational potential energy to kinetic energy and even electrical energy, and realizing gravitational potential energy power generation.

[0044] In summary, the present invention designs a water tank 1, a tower 2, a power generation mechanism 13, an energy storage mechanism, a vibration reduction mechanism 6 and a transmission mechanism 5. The energy storage counterweight block 9 fixed together by a connecting rope 10 can rise and store energy under the buoyancy of water and the tension generated by the falling of the previous energy storage counterweight block 9. When falling, the generator 21 generates electricity through the cooperation between the stop block 1303 and the synchronous belt 1302 as well as the driving wheel 17 and the driven wheel 18. The whole process does not require the loading and unloading process of heavy objects, and can realize continuous lifting and lowering of multiple heavy objects in turn for continuous power generation, forming a uniform and stable heavy flow, and the energy storage and power generation output are stable, which greatly reduces the impact on the equipment and the generator 21, and effectively suppresses the output fluctuation of current and voltage in the system power generation process, and can realize large-scale energy storage of the power grid.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gravity power generation energy storage device, comprising a water tank (1), characterized in that: One end of the upper surface of the water tank (1) is fixedly connected to a tower (2), and a plurality of energy storage counterweights (9) are placed inside the water tank (1) and the tower (2), and a connecting rope (10) is fixedly connected between the plurality of energy storage counterweights (9) in sequence, and the other end of the upper surface of the water tank (1) is symmetrically fixedly connected to a first mounting rod (11) and a second mounting rod (12), and a power generation mechanism (13) is installed on the front of the two first mounting rods (11) and the two second mounting rods (12), and an energy storage mechanism is installed on one end of the two groups of the power generation mechanisms (13); A conveying mechanism (5) is installed at the bottom of the inner wall of the water tank (1), and the conveying mechanism (5) comprises conveying wheels (502) rotatably connected to the two ends of the water tank (1), the outer surfaces of the two conveying wheels (502) are jointly sleeved with a conveying belt (501) for transmission connection, and the outer surface of the conveying belt (501) is fixedly connected with a plurality of anti-slip strips (503); A vibration-damping mechanism (6) is installed at the bottom of the side wall of the water tank (1), and the vibration-damping mechanism (6) comprises a positioning plate (603) fixedly connected to the side wall of the water tank (1), the positioning plate (603) is located on the inner side of the conveyor belt (501), and a plurality of pressure springs (602) are fixedly connected to the upper surface of the positioning plate (603), and one end of the plurality of pressure springs (602) is fixedly connected to a support plate (601).

2. A gravity power generation energy storage device according to claim 1, characterized in that: A clearance slot (3) is provided on one side of the top of the tower (2), and an inclined plate (4) is fixedly connected to one side of the outer surface of the tower (2) at a position corresponding to the clearance slot (3).

3. A gravity power generation energy storage device according to claim 2, characterized in that: The power generation mechanism (13) comprises two synchronous wheels (1301), the outer surfaces of the two synchronous wheels (1301) are jointly sleeved and meshed with a synchronous belt (1302), and the outer surface of the synchronous belt (1302) is fixedly connected with a plurality of stop blocks (1303).

4. A gravity power generation energy storage device according to claim 3, characterized in that: The synchronous wheels (1301) of a plurality of the power generation mechanisms (13) are rotatably connected to the front sides of the corresponding first mounting rods (11) and second mounting rods (12), respectively, and a first connecting rod (22) is commonly passed through and fixedly connected between the single synchronous wheels (1301) of the two power generation mechanisms (13) corresponding to the two first mounting rods (11), and a second connecting rod (23) is commonly passed through and fixedly connected between the single synchronous wheels (1301) of the two power generation mechanisms (13) corresponding to the two second mounting rods (12).

5. A gravity power generation energy storage device according to claim 4, characterized in that: The energy storage mechanism comprises a generator (21) and a large rotating disk (16) fixedly connected to the back of the water tank (1); a driving end of the generator (21) is fixedly connected to a second transmission rod (20); one end of the second transmission rod (20) is fixedly connected to a driven wheel (18); one side of the outer surface of the large rotating disk (16) is rotatably connected to a driving wheel (17); and the outer surfaces of the driven wheel (18) and the driving wheel (17) are jointly sleeved with a belt (19) for transmission connection.

6. A gravity power generation energy storage device according to claim 5, characterized in that: The backs of the single first mounting rod (11) and the single second mounting rod (12) are both rotatably connected to a small turntable (14), the two small turntables (14) are respectively fixedly connected to the synchronous wheels (1301) of the corresponding power generation mechanism (13), and the axis of the two small turntables (14) is fixedly connected to a first transmission rod (15), and one end of the two first transmission rods (15) is respectively penetrated and fixedly connected to the driving wheel (17) of the corresponding energy storage mechanism.

7. A gravity power generation energy storage device according to claim 6, characterized in that: The distance between the two first mounting rods (11) is greater than the distance between the two second mounting rods (12), and the length of the first connecting rod (22) is greater than the length of the second connecting rod (23).

8. A gravity power generation energy storage device according to claim 7, characterized in that: The upper surface of the water tank (1) is provided with a first through hole (7) and a second through hole (8), respectively; the first through hole (7) is located at the connection between the tower (2) and the water tank (1), and the second through hole (8) is located in the middle of the two first mounting rods (11) and the two second mounting rods (12).

9. An energy storage method for a gravity power generation energy storage device according to any one of claims 1 to 8, characterized in that: The specific steps include: Step 1: Fill the water tank (1) and the tower (2) with water, and use the buoyancy to make the energy storage counterweight (9) rise to the position of the clearance slot (3) and slide out of the tower (2) through the inclined plate (4); Step 2: Then, when the energy storage counterweight block (9) enters the frame structure composed of the two first mounting rods (11) and the two second mounting rods (12), it will push the block (1303) downward under the action of gravity, so that the synchronous wheel (1301) can rotate, and through the cooperation between the driving wheel (17) and the driven wheel (18), the generator (21) is driven to generate electricity, thereby converting the gravitational potential energy into electrical energy.

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