A slope-based cyclic gravity energy storage system

Abstract

The utility model discloses a kind of gravity energy storage systems of circulation based on slope, wherein system includes annular conveying track, and multiple conveying cars are provided on annular conveying track;Annular conveying track includes upper bin section track, work section track, lower bin section track and return section track connected in turn, and return section track is connected with upper bin section track again to form closed loop;Upper bin track shelf and lower bin track shelf all include auxiliary limiting frame;Auxiliary limiting frame is vertically set and is multiple rows of side-by-side arrangement, and form a layer of three-dimensional stacking space for three-dimensional stacking and placing weight block between two adjacent rows of auxiliary limiting frame, and universal ball rotatable is provided on the two side surfaces corresponding with auxiliary limiting frame of weight block.The scheme can realize the continuous transport of weight block, realize stable power generation process, can stably move in track shelf, energy loss is very small, can strengthen the safety in the process of weight block stacking, and can also speed up hoisting speed.

Description

Technical Field

[0001] This utility model belongs to the field of gravity energy storage power generation technology, specifically relating to a slope-based circulating gravity energy storage system. Background Technology

[0002] The construction of slope-based gravity energy storage systems relies on slopes (such as mountains or artificial slopes). The basic principle is the conversion between electrical energy and the gravitational potential energy of a heavy object. This gravitational potential energy is then used for energy storage. Typically, an electric motor drives the heavy object from the bottom (low altitude) to the top (high altitude) of the slope, converting electrical energy into gravitational potential energy for storage, thus charging the energy storage system. Alternatively, under the influence of gravity, the heavy object moves from the top of the slope downwards, driving a generator to produce electricity, converting gravitational potential energy back into electrical energy, which is then fed into the power grid, enabling the energy storage system to generate electricity. As a commercial and engineered power project, the success of a gravity energy storage project depends directly on its economic viability and high safety and reliability.

[0003] The energy stored in a gravity energy storage system is the gravitational potential energy of the heavy blocks. The total gravitational potential energy is related to the individual mass, quantity, and height difference of the heavy blocks. Given a fixed height difference, to ensure a larger power generation capacity, the total mass of the heavy blocks must be increased. Heavy blocks are typically large in weight, ranging from tens to hundreds of tons, which can cause significant swaying during hoisting, limiting stability and efficiency. If the individual mass is too large, the capacity of the conveying equipment is limited, and the site selection environment is often also restricted; therefore, the mass of a single heavy block cannot be too large. Thus, it is necessary to consider increasing the number of heavy blocks. However, an excessive number may lead to insufficient space for upper and lower storage at the plant site. Therefore, three-dimensional stacking of the heavy blocks is considered, where stacking efficiency and stability are particularly important, and current technologies lack detailed consideration of this. Furthermore, the handling route of the heavy blocks and the overall layout of the storage and transportation system are also key issues affecting operational efficiency. The heavy blocks need to be continuously transported to achieve a relatively stable power generation process. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a slope-based circulating gravity energy storage system, which solves the shortcomings of the existing technology in terms of efficiency and stability, realizes the circulating transportation and three-dimensional stacking of heavy blocks, can achieve a larger power generation capacity, reduce power generation fluctuations, and has high operational stability.

[0005] According to the technical solution of this utility model, this utility model provides a slope-based circulating gravity energy storage system, including a high-altitude zone, a slope, and a low-altitude zone connected in sequence; it also includes a circular conveying track on which multiple conveying vehicles are installed; the circular conveying track includes an upper storage section track, a working section track, a lower storage section track, and a return section track connected in sequence, with the return section track connecting to the upper storage section track to form a closed loop; the upper storage section track and the lower storage section track are located in the high-altitude zone and the low-altitude zone, respectively, while the working section track and the return section track are both located on the slope; in high-altitude areas... The upper warehouse is equipped with upper rail racks and upper warehouse handling equipment, while the lower warehouse is equipped with lower rail racks and lower warehouse handling equipment in the low-altitude area. Both the upper and lower warehouse rail racks include auxiliary limit frames. The auxiliary limit frames are vertically installed in multiple rows, and a three-dimensional stacking space is formed between two adjacent rows of auxiliary limit frames for stacking heavy objects. The heavy objects are equipped with rotatable omnidirectional balls on both sides corresponding to the auxiliary limit frames. Both the upper and lower warehouse handling equipment include cranes capable of lifting heavy objects in the X, Y, and Z directions.

[0006] In some embodiments, a working section chain conveyor belt is provided next to the working section track, and the working section chain conveyor belt is connected to the working section drive equipment and the power generation equipment; a return section chain conveyor belt is provided next to the return section track, and the return section chain conveyor belt is connected to the return section drive equipment; the working section chain conveyor belt and the return section chain conveyor belt have first connecting and disengaging components, and the transport vehicle has matching second connecting and disengaging components.

[0007] In some embodiments, the first connecting / uncoupling component is a support block; the working section chain conveyor belt is arranged parallel to both sides of the working section track, and the support blocks on the working section chain conveyor belt are multiple blocks spaced apart along the length direction of the working section track. The support blocks protrude towards the working section track and can move with the operation of the working section chain conveyor belt; the return section chain conveyor belt is arranged parallel to both sides of the return section track, and the support blocks on the return section chain conveyor belt are multiple blocks spaced apart along the length direction of the return section track. The support blocks protrude towards the return section track and can move with the operation of the return section chain conveyor belt; the second connecting / uncoupling component is a retractable stop block provided on both sides of the conveyor vehicle.

[0008] In some implementations, the transport vehicle is also equipped with sensors for detecting the position of the support blocks, and / or the transport vehicle is a four-way shuttle rail-guided vehicle.

[0009] In some implementations, both the working section drive equipment and the return section drive equipment are connected to motor frequency converters so that the working section chain conveyor belt and the return section chain conveyor belt can run at the same constant speed.

[0010] In some embodiments, both the upper and lower warehouse handling equipment are gantry cranes. The gantry crane includes vertical frames on both sides, with crossbeams on the vertical frames. A crane is connected to the crossbeams via an X-axis moving mechanism. The crane has a hook that can move and lift in the Z-axis direction. A Y-axis moving mechanism is provided at the bottom of the vertical frames.

[0011] In some embodiments, the upper and lower rail racks also include a base, with auxiliary limiting brackets mounted on the base. The base has a channel in the middle through which the upper and lower rail sections pass.

[0012] In some embodiments, each row of auxiliary limiting frames includes horizontal steel structural members and vertical steel structural members, which are connected to form a mesh structure, and the spacing between the horizontal steel structural members and the spacing between the vertical steel structural members are matched with the size of the weight block.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] In this slope-based circulating gravity energy storage system, the overall transport track forms a closed loop, enabling continuous transport of heavy blocks during operation and thus achieving a relatively stable power generation process. Simultaneously, omnidirectional balls are installed on both sides of the heavy blocks, and a track rack integrating limiters and tracks is designed for storing the heavy blocks. During the lifting process, when the heavy blocks sway, the omnidirectional balls contact the sides of the track rack, generating rolling friction, thus allowing stable movement in four directions (up, down, left, and right) with minimal energy loss. This enhances safety during the stacking of heavy blocks and accelerates lifting speed. Furthermore, this solution can flexibly adjust the quantity and quality of heavy blocks, the number of transport vehicles, and the quantity and lifting capacity of handling equipment according to actual power capacity requirements and site selection constraints, forming a site-specific slope-based gravity energy storage solution with high conversion efficiency and high operational stability. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the gravity energy storage system provided by this utility model.

[0016] Figure 2 yes Figure 1 Top view.

[0017] Figure 3 This is a three-dimensional structural diagram of the weight block provided by this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the return track and the transport vehicle provided by this utility model.

[0019] Figure 5 This is a schematic diagram of the main structure of a high-altitude area provided by this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 11. High-altitude area; 12. Slope; 13. Low-altitude area; 21. Upper warehouse section track; 22. Working section track; 221. Working section chain conveyor belt; 23. Lower warehouse section track; 24. Return section track; 241. Return section chain conveyor belt; 30. Conveyor vehicle; 41. Upper warehouse track rack; 42. Lower warehouse track rack; 43. Auxiliary limit frame; 44. Base; 51. Upper warehouse handling equipment; 52. Lower warehouse handling equipment; 60. Heavy block; 61. Omnidirectional ball; 70. Crane; 71. Vertical frame; 72. Horizontal beam; 81. Support block; 82. Telescopic stop block. Detailed Implementation

[0022] This invention provides a slope-based circulating gravity energy storage system that addresses the shortcomings of existing technologies in terms of efficiency and stability. It enables the cyclic transport and three-dimensional stacking of heavy blocks, achieving greater power generation capacity, reducing power generation fluctuations, and ensuring high operational stability.

[0023] Please see Figures 1 to 3 This utility model discloses a slope-based circulating gravity energy storage system, comprising a high-altitude zone 11, a slope 12, and a low-altitude zone 13 connected in sequence. It also includes a circular conveyor track on which multiple conveyor vehicles 30 are mounted. The circular conveyor track comprises an upper storage section track 21, a working section track 22, a lower storage section track 23, and a return section track 24 connected in sequence, with the return section track 24 connecting to the upper storage section track 21 to form a closed loop. The upper storage section track 21 and the lower storage section track 23 are located in the high-altitude zone 11 and the low-altitude zone 13, respectively, while the working section track 22 and the return section track 24 are both located on the slope 12. The conveyor vehicles 30 can circulate along the circular conveyor track. The function of the conveyor vehicles 30 includes transporting heavy blocks 60 between the high and low altitude zones, and the conveyor vehicles 30 carrying heavy blocks 60 can drive power generation equipment to generate electricity during the downhill process.

[0024] Upper warehouse rail racks 41 and upper warehouse handling equipment 51 are installed in the high-altitude area 11, while lower warehouse rail racks 42 and lower warehouse handling equipment 52 are installed in the low-altitude area 13. Both the upper warehouse rail racks 41 and the lower warehouse rail racks 42 include auxiliary limiting frames 43. The auxiliary limiting frames 43 are vertically arranged in multiple rows side by side, forming a three-dimensional stacking space between adjacent rows of auxiliary limiting frames 43 for stacking heavy blocks 60. This allows for three-dimensional storage of heavy blocks 60, which has a higher space utilization rate compared to conventional two-dimensional storage methods and facilitates the storage of a larger number of heavy blocks 60.

[0025] Please also refer to Figure 3 The weight block 60 has rotatable omnidirectional balls 61 on both sides corresponding to the auxiliary limiting frame 43; in other words, the weight block 60 has omnidirectional balls 61 on opposite sides, and the weight block 60 is positioned so that the omnidirectional balls 61 face the auxiliary limiting frame 43. As a supplementary explanation, an omnidirectional ball is an auxiliary device that can roll flexibly on the working surface, also known as an omnidirectional roller. Preferably, the size of the three-dimensional stacking space is matched with that of the heavy block 60. Within the three-dimensional stacking space, the universal ball 61 on at least one side of the heavy block 60 will be in contact with or almost in contact with the auxiliary limiting frame 43. In addition to serving as a limiting function of ordinary shelves, the auxiliary limiting frame 43 also serves as a running track for the heavy block 60 during the hoisting process. Since there will inevitably be shaking during the hoisting process, the universal ball 61 on at least one side of the heavy block 60 will usually roll and rub against the auxiliary limiting frame 43. Therefore, the auxiliary limiting frame 43 also serves as a running track for the hoisting process of the heavy block 60, ensuring the stability of the heavy block 60 during the placement and removal of the upper and lower warehouse track shelves, thereby helping to achieve a faster hoisting process and improve operating efficiency.

[0026] Preferably, each row of auxiliary limiting frames 43 includes horizontal steel structural members and vertical steel structural members. The horizontal and vertical steel structural members are connected to form an intersecting mesh structure. The spacing between the horizontal steel structural members and the spacing between the vertical steel structural members are matched with the size of the weight block 60. This ensures that the position of the steel structural members corresponds to the movement path of the universal ball 61 of the weight block 60 during transportation, so that the side of the steel structural member can contact the universal ball 61, achieving the effect of limiting and acting as a track.

[0027] More specifically, the main body of the weight block 60 is a cubic or cuboid concrete or metal block, with omnidirectional balls 61 embedded in the center positions of two opposite sides of the weight block 60. The weight blocks 60 are regularly stacked in the upper and lower warehouse rail racks. Furthermore, the position of the vertical steel structure corresponds to the center position of each vertical column of weight blocks 60, and the position of the horizontal steel structure corresponds to the center position of each horizontal row of weight blocks 60. The position and coverage of the steel structure are specifically designed to allow the weight block 60 to be lifted a short distance relative to its stacking position when it is taken out, and then continue to be lifted vertically or moved horizontally. The placement process is the reverse. During the removal and placement processes, the omnidirectional balls 61 do not leave the range of the steel structure.

[0028] Both the upper and lower warehouse handling equipment 51 and 52 include cranes 70 capable of lifting heavy blocks 60 in the X, Y, and Z directions. Specifically, for example, both upper and lower warehouse handling equipment 51 and 52 are gantry cranes. The gantry cranes include vertical frames 71 on both sides, with crossbeams 72 mounted on the vertical frames 71. The cranes 70 are connected to the crossbeams 72 via an X-axis moving mechanism. The cranes 70 have hooks capable of Z-axis lifting and lowering. A Y-axis moving mechanism is located at the bottom of the vertical frames 71, which may be, for example, moving wheels. Y-axis tracks are also provided on the ground in high and low altitude areas. As a supplementary explanation, the length direction of the crossbeams 72 is the X-axis, which is perpendicular to the Y-axis, and the Z-axis is vertical. Furthermore, a lifting hole structure is provided at the center of the upper part of the heavy block 60. Preferably, the lifting hole structure is not higher than the upper surface of the heavy block 60 to avoid affecting the stability of the stacking. It is understood that the method of hoisting heavy objects can adopt existing technology or other feasible methods, and this utility model is not limited to specific embodiments.

[0029] Please see Figure 5 Preferably, the upper warehouse rail rack 41 and the lower warehouse rail rack 42 also include a base 44, and an auxiliary limiting frame 43 is fixedly mounted on the base 44. The base 44 has a channel in the middle; in other words, the base is divided into two parts with a gap between them, forming a channel. The upper warehouse section rail 21 and the lower warehouse section rail 23 pass through the channel of the base 44. The heavy block 60 is stacked on the base 44, leaving space in the channel. More preferably, the auxiliary limiting frame 43 has a vertical steel structure above the channel to provide a lifting and moving track for the heavy block 60 above the channel. In this solution, the position where the conveyor 30 loads and unloads the heavy block 60 is located in the middle of the channel of the upper and lower warehouse rail racks, which can reduce the moving distance of the crane of the upper and lower warehouse handling equipment, reduce energy consumption, and increase efficiency.

[0030] Please see Figure 1 , Figure 2 , Figure 4 In a preferred embodiment, a working section chain conveyor belt 221 is provided beside the working section track 22, and the working section chain conveyor belt 221 is connected to the working section drive equipment and the power generation equipment. A return section chain conveyor belt 241 is provided beside the return section track 24, and the return section chain conveyor belt 241 is connected to the return section drive equipment. The working section chain conveyor belt 221 and the return section chain conveyor belt 241 are independent and are driven by their respective drive equipment. The working section chain conveyor belt 221 is only used to transport the conveyor 30 carrying heavy blocks 60; the return section chain conveyor belt 241 is only used to transport the empty conveyor 30, serving as a means for the cyclical transfer of the conveyor 30. The working section drive equipment preferably uses a high-power motor to drive the heavy-load chain (working section chain conveyor belt 221), and the return section drive equipment preferably uses a low-power motor to drive the light-load chain (return section chain conveyor belt 241).

[0031] More preferably, both the working section drive equipment and the return section drive equipment are connected to motor frequency converters so that the working section chain conveyor belt 221 and the return section chain conveyor belt 241 can run at the same constant speed; for example, during power generation, the speed of the unloaded conveyor 30 going uphill can be matched with the speed of the conveyor 30 carrying the heavy block 60 going downhill, so that the process of power generation can be carried out continuously without unnecessary waiting time.

[0032] The working section chain conveyor belt 221 and the return section chain conveyor belt 241 have a first connecting and disengaging component, and the conveyor 30 has a matching second connecting and disengaging component to realize the connection and separation of the conveyor 30 from the chain conveyor belt. The connecting and disengaging components can be, for example, existing disengaging hooks or hook-and-loop connections.

[0033] Preferably, the first connecting and disengaging component is a support block 81. The working section chain conveyor belt 221 is arranged parallel to both sides of the working section track 22. Multiple support blocks 81 on the working section chain conveyor belt 221 are spaced apart along the length of the working section track 22. The support blocks 81 protrude towards the working section track 22 and can move with the working section chain conveyor belt 221. Similarly, the return section chain conveyor belt 241 is arranged parallel to both sides of the return section track 24. Multiple support blocks 81 on the return section chain conveyor belt 241 are spaced apart along the length of the return section track 24. The support blocks 81 protrude towards the return section track 24 and can move with the return section chain conveyor belt 241. Specifically, the main component of the chain conveyor belt is the chain. Multiple support blocks 81 are evenly distributed and fixedly connected on the inner side of the chain links, so that the support blocks 81 can move with the chain.

[0034] Accordingly, the second connecting and disengaging component is a retractable stop 82 provided on both sides of the conveyor 30. The retractable stop 82 retracts into the conveyor 30 in high and low altitude areas (flat sections); upon entering the slope 12, the retractable stop 82 extends and contacts and cooperates with the support block 81 of the chain conveyor belt, causing the conveyor 30 to be pulled by the chain or the chain to be pulled by the conveyor 30 during the uphill and downhill process. More preferably, the conveyor 30 is also equipped with a sensor for detecting the position of the support block, so that the retractable stop 82 does not interfere with the support block 81 during its extension. This solution allows the conveyor 30 to move up and down in cooperation with the chain conveyor belt, achieving a simple and efficient connection and disengagement between the conveyor 30 and the chain conveyor belt.

[0035] It is conceivable that in some other feasible implementations, the second connecting and uncoupling component is a stop block fixedly set on both sides of the conveyor 30. Based on the movement trajectory of the support block 81, the position of the stop block and when it enters the chain area can be designed and determined so that it subsequently abuts against the support block 81 to achieve the desired effect. The uncoupling process is similar. This scheme has high requirements for the overall scheduling and operation control of the system.

[0036] The transport vehicle 30 is preferably a four-way shuttle guided vehicle (RGV), which is a rail-guided transport vehicle with two sets of wheels, capable of moving in four directions on a plane, and has high flexibility. The circular transport track is adapted to the transport vehicle 30. For example, in the embodiment, the upper section track 21 and the lower section track 23 are both arranged in the shape of a rectangle with three sides, so that the transport vehicle 30 can change direction and re-enter the slope 12 after two 90° turns. The transport vehicle 30 has two power sources during operation. One is that the transport vehicle 30 shuts down its own power system and is driven by a chain when going up or down slopes. The other is that it uses its own power system (battery power or track sliding contact line power) to operate in high and low altitude areas (e.g., generally flat areas).

[0037] Based on the gravity energy storage system of this invention, this invention also provides a working method for a slope-based circulating gravity energy storage system. Generally speaking, the working method of the gravity energy storage system mainly consists of two parts: energy storage and discharge. During energy storage, a heavy object is lifted from a low altitude (lower chamber) to a high altitude (upper chamber) for storage, ultimately converting electrical energy into gravitational potential energy. During discharge, the heavy object is lowered from the high altitude (upper chamber) to a low altitude (lower chamber), where the gravitational potential energy is first converted into kinetic energy, driving a generator to generate electricity, which is ultimately converted into electrical energy. In this solution, the electric power generation system mainly includes the working section drive equipment, the return section drive equipment, and the power generation equipment. The chain is associated with the electric power generation system; when the chain pulls the conveyor uphill, it is in electric mode; when the conveyor goes downhill, driving the chain to rotate, it is in power generation mode.

[0038] Specifically, under energy storage operating conditions, the following processes are included:

[0039] In the low-altitude area 13, the lower warehouse handling equipment 52 removes the heavy block 60 from the lower warehouse track rack 42 and loads it onto the conveyor 30 on the lower warehouse section track 23. The conveyor 30 carrying the heavy block 60 runs towards the slope 12 and adjusts its speed to the same speed as the working section chain conveyor belt 221 on the uphill section. After reaching the position of the working section chain conveyor belt 221, the conveyor 30 connects to the second connecting and disengaging component of the working section chain conveyor belt 221 through the first connecting and disengaging component. Then, the conveyor 30 shuts off its own power and is pulled uphill by the working section chain conveyor belt 221 to the high-altitude area 11.

[0040] After the conveyor 30 reaches the position of the upper warehouse section track 21, it disengages from the working section chain conveyor belt 221. At the same time, the conveyor 30 restores its own power and runs along the upper warehouse section track 21 to the upper warehouse track rack 41 and stops. The upper warehouse handling equipment 51 lifts the heavy block 60 on the conveyor 30 and places it in the upper warehouse track rack 41. The empty conveyor 30 continues to run to the position of the return section track 24, and then connects with the second connection disengagement component of the return section chain conveyor belt 241 through the first connection disengagement component, shuts off its own power, and is pulled by the return section chain conveyor belt 241 to the low altitude area 13.

[0041] After the conveyor 30 reaches the position of the lower warehouse section track 23, it disengages from the return section chain conveyor belt 241. At the same time, the conveyor 30 restores its own power, runs along the lower warehouse section track 23 to the lower warehouse track shelf 42 and stops, waiting to load the next heavy block 60.

[0042] Each conveyor 30 repeats the above process, and multiple conveyor 30s run continuously in sequence on a circular conveyor track to continuously transport the required number of heavy blocks 60 from the lower warehouse rail rack 42 to the upper warehouse rail rack 41 for storage.

[0043] Under power generation conditions, the following processes are included:

[0044] In the high-altitude area 11, the upper warehouse handling equipment 51 removes the heavy block 60 from the upper warehouse track rack 41 and loads it onto the conveyor 30 on the upper warehouse section track 21. The conveyor 30, loaded with the heavy block 60, runs towards the slope 12 and adjusts its speed to the same speed as the downhill working section chain conveyor belt 221. After reaching the position of the working section chain conveyor belt 221, the conveyor 30 connects to the second connecting and disengaging component of the working section chain conveyor belt 221 through the first connecting and disengaging component. Then, the conveyor 30 shuts off its own power, slides down under the action of gravity, and drives the working section chain conveyor belt 221, which in turn drives the power generation equipment to generate electricity, converting gravitational potential energy into electrical energy.

[0045] After the conveyor 30 reaches the position of the lower warehouse section track 23, it disengages from the working section chain conveyor belt 221. At the same time, the conveyor 30 restores its own power and runs along the lower warehouse section track 23 to the lower warehouse track rack 42 and stops. The lower warehouse handling equipment 52 lifts the heavy block 60 on the conveyor 30 and places it in the lower warehouse track rack 42. The empty conveyor 30 continues to run to the position of the return section track 24, and then connects with the second connection disengagement component of the return section chain conveyor belt 241 through the first connection disengagement component, shuts off its own power, and is pulled by the return section chain conveyor belt 241 to the high altitude area 11.

[0046] After the conveyor 30 reaches the position of the upper warehouse section track 21, it disengages from the return section chain conveyor belt 241. At the same time, the conveyor 30 restores its own power, runs along the upper warehouse section track 21 to the upper warehouse track shelf 41 and stops, waiting to load the next heavy block 60.

[0047] Each conveyor 30 repeats the above process, and multiple conveyor 30s run continuously in sequence on the circular conveyor track to continuously lower the required number of heavy blocks 60 from the upper warehouse track shelf 41 and transport them to the lower warehouse track shelf 42 for storage.

[0048] It should be noted that, in both energy storage and power generation modes, when the heavy block 60 is removed and placed, the heavy block 60 moves only in one of the horizontal or vertical directions during a single movement. After reaching the intermediate set position, it then moves in the other direction until it reaches the desired removal or placement position. During the handling and movement process, the universal ball 61 on at least one side of the heavy block 60 is always in contact with the auxiliary limiting frame 43.

[0049] Preferably, both the working section chain conveyor belt 221 and the return section chain conveyor belt 241 are equipped with a chain conveyor belt detection and monitoring system to monitor the operating status of the chain and chain guide wheels of the working section chain conveyor belt 221 and the return section chain conveyor belt 241. The detected operating status includes the chain tension and whether there are any faults in the chain and chain guide wheels. If an abnormal operating status is detected, the slope-based circulating gravity energy storage system will automatically stop and issue an alarm message.

[0050] Regarding the scheduling rhythm, since the power generation system experiences fluctuations when a conveyor 30 carrying heavy blocks 60 enters or exits the working section chain conveyor belt 221, it is preferable that, during power generation, when a conveyor 30 carrying heavy blocks 60 is about to leave the working section chain conveyor belt 221 near the low-altitude area 13, another conveyor 30 carrying heavy blocks 60 is about to enter the working section chain conveyor belt 221 at the same time in the high-altitude area 11. This reduces the fluctuations in power generation. This process is achieved through the overall coordination of the operation of the upper and lower warehouse handling equipment, the conveyor 30, and the chain conveyor belt by the control system.

[0051] Furthermore, regarding power output, specific designs can be implemented based on the project's actual requirements for power generation fluctuation rate. For example, the stability of power generation can be further enhanced through the following methods: 1. Appropriately increase the number of conveyor vehicles and appropriately reduce the mass of individual heavy blocks. This will make the heavy blocks on the slope more densely packed during power generation, reducing the mass ratio of a single heavy block to all heavy blocks on the working section's chain conveyor belt. This will reduce the fluctuations caused by a single heavy block entering and exiting the working section's chain conveyor belt. 2. Flywheel energy storage can be added. The flywheel can store energy or generate power at the point of fluctuation, reducing fluctuations. 3. Using the structure shown in this utility model as a gravity energy storage module unit, multiple slope-based gravity energy storage module units can be constructed. The scheduling and coordination of different module units can be adjusted to superimpose and synthesize their power generation, reducing fluctuations.

[0052] In summary, the slope-based circulating gravity energy storage system of this invention forms a closed loop with the overall transport track, enabling continuous transport of heavy blocks during operation and thus achieving a relatively stable power generation process. Simultaneously, the heavy blocks are equipped with omnidirectional balls on both sides, and a track rack integrating limiters and tracks is designed for storing the heavy blocks. During the lifting process, the omnidirectional balls will contact the sides of the track rack, generating rolling friction, thus allowing stable movement in four directions (up, down, left, and right) with minimal energy loss. This enhances safety during the stacking of heavy blocks and accelerates the lifting speed. Furthermore, this solution can flexibly adjust the quantity and quality of heavy blocks, the number of transport vehicles, and the quantity and lifting capacity of handling equipment according to actual power capacity requirements and site selection constraints, thereby forming a site-specific slope-based gravity energy storage solution with high conversion efficiency and high operational stability.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; obviously, the described embodiments are some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model; for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other; modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slope-based circulating gravity energy storage system, characterized in that, It includes a high-altitude area (11), a slope (12), and a low-altitude area (13) connected in sequence; it also includes a circular conveyor track with multiple conveyor cars (30) installed on it; the circular conveyor track includes an upper warehouse section track (21), a working section track (22), a lower warehouse section track (23), and a return section track (24) connected in sequence, and the return section track (24) is connected to the upper warehouse section track (21) to form a closed loop; the upper warehouse section track (21) and the lower warehouse section track (23) are located in the high-altitude area (11) and the low-altitude area (13) respectively, and the working section track (22) and the return section track (24) are both located on the slope (12); Upper warehouse rail racks (41) and upper warehouse handling equipment (51) are installed in the high-altitude area (11), and lower warehouse rail racks (42) and lower warehouse handling equipment (52) are installed in the low-altitude area (13). Both the upper warehouse rail racks (41) and the lower warehouse rail racks (42) include auxiliary limit frames (43). The auxiliary limit frames (43) are vertically installed and arranged in multiple rows side by side. A three-dimensional stacking space for stacking heavy blocks (60) is formed between two adjacent rows of auxiliary limit frames (43). The heavy blocks (60) are provided with rotatable universal balls (61) on both sides corresponding to the auxiliary limit frames (43). Both the upper warehouse handling equipment (51) and the lower warehouse handling equipment (52) include a crane (70) that can lift the heavy blocks (60) in the X, Y and Z directions of space.

2. The slope-based circulating gravity energy storage system according to claim 1, characterized in that, A working section chain conveyor belt (221) is provided next to the working section track (22), and the working section chain conveyor belt (221) is connected to the working section drive equipment and the power generation equipment; a return section chain conveyor belt (241) is provided next to the return section track (24), and the return section chain conveyor belt (241) is connected to the return section drive equipment; a first connecting and disengaging component is provided on the working section chain conveyor belt (221) and the return section chain conveyor belt (241), and a matching second connecting and disengaging component is provided on the transport vehicle (30).

3. The slope-based circulating gravity energy storage system according to claim 2, characterized in that, The first connecting and disengaging component is a support block (81); the working section chain conveyor belt (221) is arranged parallel to both sides of the working section track (22), and the support blocks (81) on the working section chain conveyor belt (221) are multiple blocks spaced apart along the length direction of the working section track (22). The support blocks (81) protrude towards the working section track (22) and can move with the working section chain conveyor belt (221); the return section chain conveyor belt (241) is arranged parallel to both sides of the return section track (24), and the support blocks (81) on the return section chain conveyor belt (241) are multiple blocks spaced apart along the length direction of the return section track (24). The support blocks (81) protrude towards the return section track (24) and can move with the return section chain conveyor belt (241); the second connecting and disengaging component is a retractable stop block (82) arranged on both sides of the conveyor vehicle (30).

4. The slope-based circulating gravity energy storage system according to claim 3, characterized in that, The transport vehicle (30) is also equipped with a sensor for detecting the position of the support block, and / or the transport vehicle (30) is a four-way shuttle rail-guided vehicle.

5. The slope-based circulating gravity energy storage system according to claim 2, characterized in that, Both the working section drive equipment and the return section drive equipment are connected to motor frequency converters so that the working section chain conveyor belt (221) and the return section chain conveyor belt (241) can run at the same speed.

6. The slope-based circulating gravity energy storage system according to any one of claims 1-5, characterized in that, The upper warehouse handling equipment (51) and the lower warehouse handling equipment (52) are both gantry cranes. The gantry cranes include vertical frames (71) located on both sides. A crossbeam (72) is provided on the vertical frame (71). A crane (70) is connected to the crossbeam (72) through an X-axis moving mechanism. The crane (70) has a hook that can move and lift in the Z-axis direction. A Y-axis moving mechanism is provided at the bottom of the vertical frame (71).

7. The slope-based circulating gravity energy storage system according to any one of claims 1-5, characterized in that, The upper warehouse rail rack (41) and the lower warehouse rail rack (42) also include a base (44), and an auxiliary limit frame (43) is set on the base (44). The base (44) has a channel in the middle, through which the upper warehouse section rail (21) and the lower warehouse section rail (23) pass.

8. The slope-based circulating gravity energy storage system according to any one of claims 1-5, characterized in that, Each row of auxiliary limiting frames (43) includes horizontal steel structural members and vertical steel structural members. The horizontal steel structural members and vertical steel structural members are connected to form a mesh structure, and the spacing between the horizontal steel structural members and the spacing between the vertical steel structural members are matched with the size of the weight block (60).

Images