A gravity energy storage device

Abstract

The present invention belongs to the field of energy storage technology, and specifically relates to a gravity energy storage device, comprising: a height difference platform and a gravity block, the gravity block comprising a waste container, the interior of the waste container is filled with sand and gravel; an upper lifting assembly and a lower lifting assembly arranged at the upper end and the lower end of the height difference platform for lifting the gravity block; and a power generation assembly installed on the height difference platform for generating electricity through the gravity block; the power generation assembly comprises a power generation conveyor belt and a lifting conveyor belt; in the present invention, sand and gravel are filled in the interior of the waste container as gravity blocks to replace traditional cement blocks, so that the waste container is not easy to be damaged, and after the waste container is damaged, it is easy to replenish and recycle without additional cost. In addition, in the present application, the conveyor belt is used as a power generation medium, which can effectively reduce the collision of the gravity block, and while not affecting the power generation effect, it can also effectively increase the service life of the gravity block, and can further improve the power generation effect and energy storage effect.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage, and in particular relates to a gravity energy storage device. Background Art

[0002] Existing energy storage technologies include gravity energy storage (mainly pumped storage), electrochemical energy storage, mechanical energy storage (flywheel energy storage), thermal energy storage (molten salt photovoltaic towers, etc.), compressed air energy storage, etc. At present, the existing solid gravity energy storage can rely on the gravity energy storage of the mountain. It has natural advantages in mountainous areas and can be used for large-scale energy storage. Solid gravity energy storage uses the height difference of the mountain to store energy. Its construction can use the changes in terrain, and the energy storage carrier can be recycled. It will hardly cause pollution to the environment. Compared with other forms of energy storage, it has good reliability and economy.

[0003] Pumped storage and compressed air energy storage have large energy storage scales and relatively mature technologies, but both occupy large spaces and have certain requirements for site selection. The former is limited by hydrological and geological conditions, while the latter requires the use of existing mines and caves. Flywheel energy storage has the characteristics of fast response speed and long life, but its energy density is low, self-discharge rate is high, and investment cost is high. Thermal energy storage technologies such as cold storage and heat storage are mostly used for user-side energy storage due to limitations such as the difficulty of storing heat (cold) energy for a long time and transporting it over long distances, so as to facilitate nearby consumption. Electrochemical energy storage technology is the most widely used energy storage technology, with the characteristics of large capacity, low cost, and modularity.

[0004] In terms of gravity energy storage, concrete blocks are used as gravity units. However, due to their disadvantages such as being environmentally unfriendly to obtain, the economic feasibility of additional manufacturing of concrete blocks being questionable, and the fact that they can hardly be reused after being crushed, losses are increased. Summary of the invention

[0005] The object of the present invention is to provide a gravity energy storage device, which solves the problems raised in the above-mentioned background technology by filling sand and gravel inside the waste container as gravity blocks.

[0006] To achieve the above-mentioned purpose, the present invention proposes a gravity energy storage device, comprising: a height difference platform and a gravity block, the gravity block comprising a waste container, the interior of the waste container being filled with sand and gravel; an upper lifting assembly and a lower lifting assembly arranged at the upper and lower ends of the height difference platform for lifting the gravity block; and a power generation assembly installed on the height difference platform for generating electricity through the gravity block; the power generation assembly comprises a power generation conveyor belt and a lifting conveyor belt; the upper lifting assembly is used to transfer the gravity block above the height difference platform to the upper end of the power generation conveyor belt, the power generation conveyor belt rotates under the gravity of the gravity block and generates electricity at the same time; the lower lifting assembly is used to transfer the gravity block below the height difference platform to the lifting conveyor belt, and the lifting conveyor belt transports the gravity block below to the top of the height difference platform.

[0007] Preferably, the lifting conveyor belt operates when there is excess power in the power grid, and the power generation conveyor belt operates when there is insufficient power in the power grid.

[0008] Preferably, the upper lifting assembly and the lower lifting assembly both include: a gantry and a Y-axis slide rail; an XZ-axis hoist for lifting the gravity block is installed on the top of the gantry, and the lower end of the gantry is installed on the Y-axis slide rail.

[0009] Preferably, the XZ-axis lifting machine comprises: an electric slide installed on the X-axis; a screw lifting machine arranged on the Y-axis is installed on the slide of the electric slide, a hook is installed on the output end of the screw lifting machine through a hanger, and hanging holes matching the hook are provided at the four corners of the top of the gravity block.

[0010] Preferably, the power generation conveyor belt and the lifting conveyor belt both include: a frame, a plate-like conveyor belt, and a support shaft; wherein the plate-like conveyor belt is installed in the frame via a rotating shaft, and the support shaft is rotatably installed on the inner side of the frame and contacts the inner surface of the plate-like conveyor belt.

[0011] Preferably, the end of the rotating shaft in the power generation conveyor belt is connected to a gearbox, the output end of the gearbox is connected to a generator, and the generator is connected to the power grid through a thyristor soft grid connection method.

[0012] Preferably, a driving motor is installed at the end of the rotating shaft in the lifting conveyor belt through a transmission.

[0013] Preferably, the working mode of the gearbox is a constant speed mode.

[0014] Preferably, a limit block for limiting the position of the gravity block is fixed on the outer surface of the plate-shaped conveyor belt.

[0015] Technical effects and advantages of the present invention: Compared with the prior art, the gravity energy storage device proposed by the present invention has the following advantages:

[0016] In the present invention, sand and gravel are filled inside the waste container as gravity blocks to replace traditional cement blocks, making it not easy to damage. After the waste container is damaged, it is easy to replenish and recycle without adding extra costs. In addition, the conveyor belt is used as the medium for power generation in the present application, which can effectively reduce the collision of the gravity block. While not affecting the power generation effect, it can also effectively increase the service life of the gravity block, which can further improve the power generation effect and energy storage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a gravity energy storage device of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the power generation assembly of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the lifting assembly of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the gravity block of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the generator of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the support shaft of the present invention.

[0023] In the figure:

[0024] 100. Height difference platform;

[0025] 200, upper lifting assembly; 201, gantry; 202, XZ axis lifting machine; 203, Y axis slide rail; 204, electric slide; 205, screw lifting machine; 206, hook; 207, hanging hole;

[0026] 300, lower lifting assembly;

[0027] 400, gravity block; 401, waste container;

[0028] 500, power generation component; 501, power generation conveyor belt; 502, lifting conveyor belt; 503, frame; 504, plate conveyor belt; 505, support shaft; 506, rotating shaft; 507, gearbox; 508, generator; 509, limit block. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying 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, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In an embodiment of the present invention, a gravity energy storage device is provided, which can be installed as a supporting facility at a hydropower station, a wind power station, a solar power station, or a thermal power station. Its purpose is to store energy when there is excess power capacity and to supplement power to the power grid when there is a shortage of power. The details are as follows.

[0031] For example, Figure 1-2 As shown, in this embodiment, the gravity energy storage device includes: a height difference platform 100 , an upper lifting assembly 200 , a lower lifting assembly 300 , a gravity block 400 , and a power generation assembly 500 .

[0032] Specifically, the height difference platform 100 can be composed of a bracket (not shown in the figure), an upper platform, a lower platform, and an inclined platform. The upper platform is arranged at the upper end of the inclined platform, and the lower platform is arranged at the lower end of the inclined platform. Further, the upper lifting component 200 is arranged on the upper platform, and the lower lifting component 300 is arranged on the lower platform. The vertical drop is related to the design, and the figure is only a schematic diagram.

[0033] Among them, multiple groups of gravity blocks 400 are provided, and the gravity blocks 400 include waste containers 401, and the interior of the waste containers 401 is filled with sand and gravel, such as Figure 4 As shown. The interior of the old container 401 can be slightly modified, and additional X-shaped reinforcing steel bars can be welded. Strengthen the structure of the entire container and improve durability. Since the interior is filled with sand and gravel instead of goods, the additional welded reinforcing steel bars will not affect the use. Compared with the use of concrete blocks, filling containers with sand and gravel as gravity blocks has the advantages of a wide range of containers, a large amount of existing idle resources can be used, the box body can be recycled, and there is no need to increase carbon emissions. The power generation component 500 installed on the height difference platform 100 is used to generate electricity through the gravity block 400.

[0034] Specifically, Figure 2 , Figure 5 , Figure 6 As shown, the power generation assembly 500 includes a power generation conveyor belt 501 and a lifting conveyor belt 502 .

[0035] Among them, the upper lifting component 200 is used to transfer the gravity block 400 above the height difference platform 100 to the upper end of the power generation conveyor belt 501, and the power generation conveyor belt 501 rotates under the gravity of the gravity block 400 and generates electricity at the same time; the lower lifting component 300 is used to transfer the gravity block 400 below the height difference platform 100 to the lifting conveyor belt 502, and the lifting conveyor belt 502 transports the gravity block 400 below to the top of the height difference platform 100.

[0036] Specifically, the upper lifting component 200 is used to place the gravity block 400 on the upper platform on the power generation conveyor belt 501. After the gravity block 400 on the power generation conveyor belt 501 runs to the bottom, it falls on the lower platform. Then, the gravity block 400 on the lower platform is placed on the lifting conveyor belt 502 through the lower lifting component 300, and the lifting conveyor belt 502 transports the gravity block 400 to the upper platform.

[0037] The power generation conveyor belt 501 and the lifting conveyor belt 502 both include: a frame 503, a plate-shaped conveyor belt 504, and a support shaft 505. The plate-shaped conveyor belt 504 is installed in the frame 503 via a rotating shaft 506, and the support shaft 505 is rotatably installed on the inner side of the frame 503 and contacts the inner surface of the plate-shaped conveyor belt 504, which can play a role in supporting the plate-shaped conveyor belt 504, thereby ensuring the stability of the gravity block 400.

[0038] In order to improve the stability of kinetic energy output, a gearbox 507 is connected to the end of the rotating shaft 506 in the power generation conveyor 501, and a generator 508 is connected to the output end of the gearbox 507. The generator 508 is connected to the power grid through a thyristor soft grid connection method. Among them, the working mode of the gearbox 507 is a constant speed mode, so that the speed temperature of the generator 508 is constant, ensuring the stability of power generation.

[0039] On the other hand, a driving motor is installed at the end of the rotating shaft 506 in the lifting conveyor belt 502 through a transmission, which is used to drive the lifting conveyor belt 502 to rotate. In addition, in order to improve the stability of the gravity block 400 on the plate-shaped conveyor belt 504, a limit block 509 for limiting the position of the gravity block 400 is fixed on the outer surface of the plate-shaped conveyor belt 504. Optionally, the height of the limit block 509 can be set higher as needed, which can better block the gravity block 400 and prevent it from tipping over.

[0040] It is worth noting that the above-mentioned lifting conveyor belt 502 works when the power grid has excess electricity, and the power generation conveyor belt 501 works when the power grid has insufficient electricity, so that it can store excess electricity.

[0041] For example, Figure 3As shown, the upper lifting assembly 200 and the lower lifting assembly 300 both include: a gantry 201 and a Y-axis slide rail 203. An XZ-axis hoist 202 for lifting the gravity block 400 is installed on the top of the gantry 201, and the lower end of the gantry 201 is installed on the Y-axis slide rail 203.

[0042] Specifically, the XZ-axis elevator 202 includes: an electric slide 204 installed on the X-axis; a screw elevator 205 arranged on the Y-axis is installed on the slide of the electric slide 204, and a hook 206 is installed on the output end of the screw elevator 205 through a hanger, and hanging holes 207 matching the hook 206 are provided at the four corners of the top of the gravity block 400.

[0043] It is worth noting that the above-mentioned hook 206 and hanging hole 207 can refer to the container hoisting method in the prior art.

[0044] In the present application, a screw hoist 205 is used to drive a hook 206 to hook a hanging hole 207 to lift a gravity block 400. This process is a rigid connection, which changes the traditional connection method of a steel wire rope and makes the lifting more stable.

[0045] In addition, in order to improve the stability of the gravity block 400, multiple sets of support frames are arranged inside the container to improve the strength.

[0046] When using the gravity energy storage device proposed in this embodiment to store energy, the following steps can be referred to:

[0047] (1): When there is excess power capacity, the excess power is used as the power of the upper lifting assembly 200, the lower lifting assembly 300, and the lifting conveyor belt 502, and the gravity block 400 on the lower platform is placed on the lifting conveyor belt 502, and the lifting conveyor belt 502 transports the gravity block 400 to the upper platform, and then the upper lifting assembly 200 stacks the gravity block 400 on the upper platform;

[0048] (2): When the power of the power grid is insufficient, the gravity block 400 on the upper platform of the upper lifting assembly 200 is placed on the power generation conveyor belt 501. The power generation conveyor belt 501 rotates downward due to the gravity of the gravity block 400, thereby driving the gearbox to rotate through the rotating shaft, converting potential energy into kinetic energy of the generator 508, and the generator 508 generates electricity and transmits the electricity to the power grid.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gravity energy storage device, characterized in that: include: A height difference platform (100) and a gravity block (400), wherein the gravity block (400) comprises a waste container (401), and the interior of the waste container (401) is filled with sand and gravel; An upper lifting assembly (200) and a lower lifting assembly (300) are arranged at the upper and lower ends of the height difference platform (100) and are used to lift the gravity block (400); and A power generation assembly (500) installed on the height difference platform (100) and used for generating power through the gravity block (400); The power generation component (500) comprises a power generation conveyor belt (501) and a lifting conveyor belt (502); the upper lifting component (200) is used to transfer the gravity block (400) above the height difference platform (100) to the upper end of the power generation conveyor belt (501), and the power generation conveyor belt (501) rotates under the gravity of the gravity block (400) and generates electricity at the same time; the lower lifting component (300) is used to transfer the gravity block (400) below the height difference platform (100) to the lifting conveyor belt (502), and the lifting conveyor belt (502) transports the gravity block (400) below to the top of the height difference platform (100).

2. A gravity energy storage device according to claim 1, characterized in that: The lifting conveyor belt (502) operates when the power grid has excess power, and the power generation conveyor belt (501) operates when the power grid has insufficient power.

3. A gravity energy storage device according to claim 1, characterized in that: The upper lifting assembly (200) and the lower lifting assembly (300) both comprise: a gantry (201) and a Y-axis slide rail (203); an XZ-axis lifter (202) for lifting the gravity block (400) is installed on the top of the gantry (201), and the lower end of the gantry (201) is installed on the Y-axis slide rail (203).

4. A gravity energy storage device according to claim 3, characterized in that: The XZ-axis elevator (202) comprises: an electric slide (204) installed on the X-axis; a screw elevator (205) arranged on the Y-axis is installed on the slide of the electric slide (204); a hook (206) is installed on the output end of the screw elevator (205) through a hanger, and hanging holes (207) matching the hook (206) are provided at the four corners of the top of the gravity block (400).

5. A gravity energy storage device according to claim 1, characterized in that: The power generation conveyor belt (501) and the lifting conveyor belt (502) both include: a frame (503), a plate-shaped conveyor belt (504), and a support shaft (505); wherein the plate-shaped conveyor belt (504) is installed in the frame (503) via a rotating shaft (506), and the support shaft (505) is rotatably installed on the inner side of the frame (503) and contacts the inner surface of the plate-shaped conveyor belt (504).

6. A gravity energy storage device according to claim 5, characterized in that: The end of the rotating shaft (506) in the power generation conveyor belt (501) is connected to a gearbox (507), the output end of the gearbox (507) is connected to a generator (508), and the generator (508) is connected to the power grid through a thyristor soft grid connection method.

7. A gravity energy storage device according to claim 5, characterized in that: The end of the rotating shaft (506) in the lifting conveyor belt (502) is equipped with a driving motor via a transmission.

8. A gravity energy storage device according to claim 6, characterized in that: The working mode of the gearbox (507) is a constant speed mode.

9. A gravity energy storage device according to claim 5, characterized in that: A limiting block (509) for limiting the position of the gravity block (400) is fixed on the outer surface of the plate-shaped conveyor belt (504).

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