Gravity energy storage system

Abstract

The utility model discloses a gravity energy storage system, which belongs to the technical field of energy storage equipment and comprises an energy storage well built under the ground and formed by pouring, four linear motors are embedded in the inner wall of the energy storage well, moving parts of the four linear motors are connected with a connecting plate, and the side wall of the connecting plate is in sliding connection with the inner wall of the energy storage well; the balancing weights are used for adjusting gravitational potential energy, inserting rods and inserting holes which are used for assisting in fixing are welded to the bottoms of the balancing weights, and the side walls of the inserting rods are in sliding connection with the inserting holes; a storage groove is formed in the top of the connecting plate, the inner wall of the storage groove is slidably connected with the side wall of the balancing weight, an insertion hole and an insertion rod are arranged on the inner bottom wall of the storage groove, and a threaded rod connected with the balancing weight is arranged between the insertion rod and the insertion hole. The amount of electric energy which can be stored in a single energy storage well can be adjusted by increasing and reducing the number of the balancing weights, so that resource consumption generated by expansion of the energy storage well is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage equipment technology, and in particular to a gravity energy storage system. Background Technology

[0002] Gravity energy storage is a technology that uses gravitational potential energy to store energy. It involves lifting a heavy object to a high position, converting electrical energy into gravitational potential energy, and then releasing this potential energy back into electrical energy when needed through gravity. Existing gravity well energy storage devices typically only store a fixed amount of potential energy within a single well, and cannot be flexibly adjusted according to the amount of electricity remaining in the grid. This necessitates allowing for adjustments during the construction of energy storage wells. The construction of energy storage wells is labor-intensive and costly, and excessive construction leads to resource waste and extended construction periods, resulting in limited practicality.

[0003] A search revealed, for example (Authorization Announcement No. CN219164301U), a gravity well energy storage device comprising an electric well and several gravity wells. The electric well houses a control mechanism, which includes a transmission component and an adjustment component. The adjustment component restricts the movement of the transmission component. The transmission component is connected to gravity modules via traction ropes. The gravity modules are placed within the gravity wells, and guide wheels are mounted on the gravity wells. The traction ropes are wound around the guide wheels. This well-group design solves the stringent site requirements of gravity block energy storage. While this device addresses the issue of large footprint required by existing equipment, it still lacks the flexibility to adjust to specific conditions, potentially leading to insufficient energy storage or idle storage wells, thus reducing the device's practicality. Utility Model Content

[0004] The purpose of this invention is to provide a gravity energy storage system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gravity energy storage system, comprising:

[0006] The energy storage well is constructed by pouring concrete below ground level. Four identical linear motors are embedded in the inner wall of the energy storage well. The moving parts of the four linear motors are connected to connecting plates for fixing. The side walls of the connecting plates are slidably connected to the inner wall of the energy storage well.

[0007] Several counterweights are used to adjust gravitational potential energy. The bottom of the counterweights is welded with a plug rod and a socket for auxiliary fixation. The side wall of the plug rod is slidably connected to the socket.

[0008] The top of the connecting plate is provided with a storage slot, the inner wall of the storage slot is slidably connected to the side wall of the counterweight, and the inner bottom wall of the storage slot is also provided with a hole and a rod, and a threaded rod connected to the counterweight is provided between the rod and the hole.

[0009] As a preferred embodiment, each of the four linear motors has a movable block welded to its moving part, and the side wall of each movable block is slidably connected to the inner wall of the energy storage well.

[0010] As a preferred embodiment, the other side of the four movable blocks is welded to the side wall of the circular plate, and the side wall of the circular plate is connected to the inner wall of the energy storage well.

[0011] As a preferred embodiment, the top of the circular plate is also provided with symmetrical insertion holes and rods, and the circular plate abuts against the bottom of the connecting plate through the insertion holes and rods.

[0012] As a preferred embodiment, the counterweight has eight equally spaced through holes inside, each of which is connected to a mounting hole located on the top of the counterweight.

[0013] In a preferred embodiment, the inner walls of the four mounting holes are slidably connected to the threaded rod, and the end of the threaded rod is threaded with a nut, the bottom of which abuts against the bottom wall of the mounting hole.

[0014] As a preferred embodiment, the top of the counterweight is welded with a lifting lug, which is connected to the lifting structure installed on the top of the energy storage well.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0016] This gravity energy storage system features a connecting plate slidably connected to the inner wall of the energy storage well. The connecting plate is equipped with threaded rods, insertion holes, and insertion rods that connect to a counterweight. The counterweight also has a through-hole inside, which communicates with a mounting hole on the top of the counterweight. With the help of the mounting hole and nuts, the connection between the counterweight and the connecting plate, as well as between the counterweights themselves, is completed. This allows for adjustment of the amount of gravitational potential energy stored inside the energy storage well according to actual use, reducing the need for energy storage well construction, avoiding resource waste, and improving the practicality of the device.

[0017] In order to maintain the stability of the gravitational potential energy stored in the energy storage well and reduce the traction force on the auxiliary equipment inside the energy storage well, this gravity energy storage system has four linear motors installed inside the energy storage well. The moving parts of the linear motors are welded with moving blocks, which are welded to circular plates. The top of the circular plates is fixed to a connecting plate. After the energy storage well stores gravitational potential energy, the movement of the linear motors can be controlled to drive the circular plates to be fixed to the connecting plates, providing support for the connecting plates. This avoids mechanical damage to the equipment when the energy storage well is used for long-term storage, and improves the structural stability of the device.

[0018] This device solves the problem of existing equipment being unable to control the adjustment of the counterweight of the energy storage well according to the actual situation, avoids the waste of resources and manpower during the construction of the energy storage well, and improves the practicality of the device. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a gravity energy storage system according to the present invention;

[0021] Figure 2 For practical purposes Figure 1 Half-section view of the energy storage well in the middle AA direction;

[0022] Figure 3 This is a schematic diagram of the structure of the mating block connection of this utility model;

[0023] Figure 4 This is a schematic diagram of the circular plate connection structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the connecting plate of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of one design of the counterweight block of this utility model;

[0026] Figure 7 This is a structural schematic diagram of another design of the counterweight block of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the diagram: 1. Energy storage well; 2. Counterweight; 3. Connecting plate; 4. Nut; 5. Lifting lug; 6. Mounting hole; 7. Linear motor; 8. Circular plate; 9. Threaded rod; 10. Moving block; 11. Insertion hole; 12. Insert rod. Detailed Implementation

[0029] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0030] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0031] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0032] An embodiment of a gravity energy storage system, such as Figures 1 to 7 As shown, existing energy storage wells 1 are all built below ground, which can reduce the footprint and facilitate heat dissipation and cooling of mechanical equipment. Since the energy storage value of energy storage well 1 is fixed when it is built, in order to ensure the mobility margin of the equipment, the storage value of energy storage well 1 is usually marked low, or more energy storage wells 1 are built for emergency use. The energy storage range of energy storage well 1 cannot be flexibly adjusted. This application innovates based on this.

[0033] Furthermore, due to the complex internal structure of the energy storage well 1, this application mainly addresses the issue of adding or removing counterweight 2, without describing the equipment and other devices and structures required inside the energy storage well 1.

[0034] include:

[0035] The energy storage well 1 is constructed underground. In order to reduce the land area occupied by the gravity energy storage system and improve the space utilization of the land, except for a few energy storage structures that need to store energy for power generation, most of them are built underground. The depth, diameter and wall thickness of the energy storage well 1 are selected according to the geological conditions of the construction site.

[0036] The inner wall of the energy storage well 1 is embedded with four identical linear motors 7. The linear motors 7 are all of the same model, function and stroke, so as to effectively control the synchronous operation of the linear motors 7. Even if there is a step difference between each one, it can be compensated by the movement and connection between the linear motors 7, without affecting the uniformity and coordination of the overall movement.

[0037] The moving parts of the four linear motors 7 are welded with moving blocks 10. The side walls of the moving blocks 10 are slidably connected to the inner wall of the energy storage well 1. The moving blocks 10 are connected to a circular plate 8 for support. The top of the circular plate 8 is provided with a socket 11 and a rod 12 for easy connection. The socket 11 and the rod 12 are slidably connected and symmetrically staggered. The top of the circular plate 8 abuts against the bottom of the connecting plate 3. The side walls of the connecting plate 3 are slidably connected to the inner wall of the energy storage well 1.

[0038] By controlling the movement of the moving part of the linear motor 7, the connected circular plate 8 drives the fixed connecting plate 3 to move, so that the counterweight 2 fixed to the inner wall of the storage slot set on the top of the connecting plate 3 can be supported by the linear motor 7 after rising to a certain height inside the energy storage well 1, avoiding long-term suspension and stopping, protecting the equipment installed inside the energy storage well 1 and the overall gravity energy storage system, avoiding structural damage, and improving the stability of the structure.

[0039] Several counterweights 2 are used to allocate gravitational potential energy. The counterweights 2 are set so that they can be added or removed to select according to the working environment and conditions of the gravity energy storage system. Correspondingly, the threshold of the power generation unit for converting gravitational potential energy into electricity is relatively high, and the power generation efficiency of the power unit will not decrease due to the addition of counterweights 2.

[0040] The bottom of the counterweight 2 is welded with a plug rod 12 and a plug hole 11 for auxiliary fixing. The side wall of the plug rod 12 is slidably connected to the plug hole 11. The top of the connecting plate 3 is provided with a storage groove. The inner wall of the storage groove is slidably connected to the side wall of the counterweight 2. The inner bottom wall of the storage groove is also provided with a plug hole 11 and a plug rod 12. A threaded rod 9 connected to the counterweight 2 is provided between the plug rod 12 and the plug hole 11. The threaded rod 9 passes through four mounting holes 6. It is connected to the threaded rod 9 through the nuts 4 inside the mounting holes 6, thus completing the connection and fixing between the counterweights 2 and between the connecting plate 3 and the counterweight 2. This avoids the situation where the counterweights 2 are unstable due to the superposition of the number of counterweights 2, and facilitates use.

[0041] To facilitate connection between adjacent counterweights 2, the surface of the counterweight 2 connected to the connecting plate 3 is not provided with mounting holes 6, and the top of the counterweight 2 with welded lifting lugs 5 is not provided with threaded rods 9. The tops of other counterweights 2 are provided with the aforementioned mounting holes 6 and threaded rods 9, and the adjacent ones are staggered to facilitate connection. Since the threaded rods 9 extend to the outside through the mounting holes 6, in order to ensure a tight connection, a connecting groove corresponding to the threaded rods 9 is provided at the bottom of the counterweight 2. The connecting groove is movably connected to the threaded rods 9. In addition, when power generation is required, the moving part of the linear motor 7 is directly disengaged from the connecting plate 3 and placed at the bottom of the energy storage well 1. In order to enable maintenance at the bottom of the energy storage well 1, a hollow working space is generally provided at the bottom of the energy storage well 1, which does not affect the addition or removal of counterweights 2 and the maintenance of equipment at the bottom of the energy storage well 1.

[0042] The energy storage well 1, linear motor 7, and hoisting structure are all conventional instruments. Their working principles, dimensions, and models are irrelevant to the function of this application, so they will not be described in detail. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0043] Working principle

[0044] When using this gravity energy storage system, the counterweight 2 is disassembled and installed by connecting the threaded rod 9 and nut 4, depending on the installation location of the gravity energy storage system. Then, the electric drive device is activated to wind up the hoisting rope connected to the lifting lug 5, causing the counterweight 2 fixed at the top of the connecting plate 3 to rise. After moving to a suitable position, the moving part of the linear motor 7 is activated to drive the connected moving block 10 to move, so that the circular plate 8 fixed to the moving block 10 abuts against the connecting plate 3 for support, thus completing the conversion of electrical energy into gravitational potential energy.

[0045] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gravity energy storage system, comprising: An energy storage well (1) is constructed by pouring concrete below the ground. Four linear motors (7) of the same type are embedded in the inner wall of the energy storage well (1). The moving parts of the four linear motors (7) are connected to a connecting plate (3) for fixing. The side wall of the connecting plate (3) is slidably connected to the inner wall of the energy storage well (1). Several counterweights (2) for adjusting gravitational potential energy, the bottom of the counterweights (2) are welded with a plug rod (12) and a socket (11) for auxiliary fixing, and the side wall of the plug rod (12) is slidably connected to the socket (11); The top of the connecting plate (3) is provided with a storage slot, the inner wall of the storage slot is slidably connected to the side wall of the counterweight (2), and the inner bottom wall of the storage slot is also provided with a socket (11) and a rod (12), and a threaded rod (9) connected to the counterweight (2) is provided between the rod (12) and the socket (11).

2. The gravity energy storage system according to claim 1, characterized in that: Each of the four linear motors (7) has a movable block (10) welded to its moving part, and the side wall of each movable block (10) is slidably connected to the inner wall of the energy storage well (1).

3. The gravity energy storage system according to claim 2, characterized in that: The other side of the four movable blocks (10) is welded to the side wall of the circular plate (8), which is connected to the inner wall of the energy storage well (1).

4. A gravity energy storage system according to claim 3, characterized in that: The top of the circular plate (8) is also provided with symmetrical insertion holes (11) and insertion rods (12), and the circular plate (8) abuts against the bottom of the connecting plate (3) through the insertion holes (11) and insertion rods (12).

5. A gravity energy storage system according to claim 1, characterized in that: The counterweight (2) has eight equally spaced through holes inside, each of which is connected to a mounting hole (6) located on the top of the counterweight (2).

6. A gravity energy storage system according to claim 5, characterized in that: The inner walls of the four mounting holes (6) are slidably connected to the threaded rod (9), and the end of the threaded rod (9) is threaded with a nut (4), the bottom of the nut (4) abutting against the bottom wall of the mounting hole (6).

7. A gravity energy storage system according to claim 5, characterized in that: The top of the counterweight (2) is welded with a lifting lug (5), which is connected to the lifting structure set on the top of the energy storage well (1).

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