A gravity energy storage yard tandem hoisting system

Abstract

The application discloses a gravity energy storage yard row hoisting system, which comprises a total controller, at least two groups of parallelly arranged heavy block hoisting devices, the heavy block hoisting device comprises a hoisting component and a lifting driving component, each group of lifting driving components is consistent in structure, one end of each group of lifting driving components is power-connected to the corresponding hoisting component, and the other end of each group of lifting driving components is power-connected to a same counterweight component, the lifting driving component and the counterweight component are controlled by the total controller, and the total controller adjusts the height of the hoisting component and the counterweight component by controlling the operation of the lifting driving component. The gravity energy storage system's hoisting energy consumption is effectively reduced, the consistency of the multiple-row hoisting is improved, and reliable technical support is provided for the large-scale application of the track type gravity energy storage technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of related equipment for gravity energy storage, and particularly relates to a gravity energy storage yard combined hoisting system. BACKGROUND

[0002] With the deep reform of energy structure in China, the rapid development of renewable energy puts forward higher requirements for the stability, flexibility and regulation capacity of the power grid. However, the intermittency and volatility of renewable energy make it difficult to match the supply and demand of the power grid, and efficient and large-capacity energy storage technology is urgently needed to smooth power output, peak shaving and valley filling, and participate in power grid frequency modulation and voltage regulation. At present, as a new type of physical energy storage technology, gravity energy storage has become an important choice for solving the problems of renewable energy grid connection and power grid regulation, with the advantages of large capacity, low cost, high efficiency, long service life and environmental friendliness.

[0003] The basic principle of gravity energy storage is to store potential energy by lifting heavy objects to a high position through a power-driven mechanism, and to generate electricity by driving a generator through the falling of the heavy object. Among them, the track type gravity energy storage system has become the focus of technical development due to its modular design, strong site adaptability and potential for distributed deployment. However, in actual operation, the transportation efficiency and energy conversion efficiency are key indicators, and the heavy block hoisting link as the core process of energy storage and energy release directly affects the overall efficiency. The traditional hoisting device is driven independently, and when the scale of gravity energy storage needs to be loaded and unloaded, the independent hoisting and unloading has poor coordination, low transfer efficiency and high energy consumption. When each heavy block is lifted, the motor needs to overcome the entire load, and the difference between the empty load and the full load working conditions is large, resulting in energy waste. SUMMARY

[0004] In view of the above deficiencies in the prior art, the present application aims to provide a gravity energy storage yard combined hoisting system, which not only effectively reduces the hoisting energy consumption of the gravity energy storage system, but also improves the coordination consistency of multi-row hoisting, providing reliable technical support for the scale application of track type gravity energy storage technology.

[0005] The technical scheme adopted by the present application to achieve the above-mentioned purpose is as follows:

[0006] A gravity energy storage yard combined hoisting system, comprising a total controller, at least two groups of parallel arranged heavy block hoisting devices, each heavy block hoisting device comprising a lifting assembly, a lifting drive assembly,

[0007] Each lifting drive assembly has the same structure, one end of which is power connected to the corresponding lifting assembly, and the other end is commonly power connected to the same counterweight assembly. The lifting drive assembly and the counterweight assembly are controlled by the total controller. The total controller controls the synchronous operation of all lifting drive assemblies to adjust the height of the lifting assembly and the counterweight assembly.

[0008] Furthermore, when multiple of the aforementioned heavy block lifting devices are arranged in a row, the counterweight assembly is positioned in the middle of the row of heavy block lifting devices on the side opposite to the lifting direction.

[0009] Furthermore, the heavy block lifting device includes a truss and a transverse trolley, the transverse trolley is assembled onto the truss and moves laterally, and the lifting assembly is assembled onto the transverse trolley.

[0010] Furthermore, the lifting drive assembly includes a drive motor, a traction wheel, and a steel wire rope. The traction wheel is rotatably mounted on the truss and is poweredly connected to the drive motor. One end of the steel wire rope is fixed to the truss, and the other end is connected to the transverse trolley, the lifting assembly, and the traction wheel in sequence through multiple pulleys and is fixedly connected to the counterweight assembly.

[0011] Furthermore, when the counterweight assembly and the heavy block lifting device are not arranged in a straight line, the wire rope on the heavy block lifting device is connected to the counterweight assembly through a turning arrangement. The turning position and the guide positions before and after the turning position are all equipped with guide pulleys. The guide pulleys at the turning position and the guide positions before and after the turning position are equipped with stepped guide rope grooves to guide the wire rope to turn.

[0012] Furthermore, the lifting drive assembly, hoisting assembly, and traverse trolley of each set of heavy block lifting devices are all controlled by the main controller, and the main controller performs synchronous control of the lifting drive assembly, hoisting assembly, and traverse trolley of each set of heavy block lifting devices. The initial position and running posture of each hoisting assembly are the same.

[0013] Furthermore, the lifting assembly includes multiple grippers, the gripper groups of multiple heavy block lifting devices are spaced equally apart, the truss is provided with a loading and unloading rail, and a transport train that cooperates with the lifting assembly runs on the loading and unloading rail.

[0014] Furthermore, the counterweight assembly includes a counterweight block, a fixed support frame, and a load-bearing frame disposed within the fixed support frame for gripping the counterweight block. The counterweight block is placed directly below the load-bearing frame, and each of the steel wire ropes passes through the load-bearing frame and is fixed to the fixed support frame.

[0015] Furthermore, the pulley includes a fixed pulley and a movable pulley. The movable pulley is installed on the lifting assembly and the supporting frame, while the fixed pulley is installed on the traversing trolley, the truss, and the fixed support frame. The lifting assembly and the supporting frame are suspended from the traversing trolley and the fixed support frame respectively by steel wire ropes passing over the corresponding movable pulleys.

[0016] Furthermore, symmetrical counterweight lifting components are provided on both sides of the load-bearing frame for lifting and fixing the counterweight blocks, and the counterweight lifting components are controlled by a central controller.

[0017] The beneficial effects of this invention are:

[0018] 1. Multi-unit collaborative operation improves transfer efficiency. Multiple sets of heavy block lifting devices operate synchronously, with multiple lifting drive components controlled and connected to the same counterweight assembly. This reduces the installation of counterweight equipment, lowers project costs, and improves the synchronous and coordinated control of multiple heavy block lifting operations. It enables the loading and unloading of energy storage heavy blocks from multiple carriages of railcars, significantly shortening transfer time and improving the response speed of the energy storage system. This is suitable for large-scale gravity energy storage power stations, meeting the needs of high-frequency, large-volume heavy block lifting.

[0019] 2. Significantly reduces energy consumption and improves energy conversion efficiency. The design incorporates a linkage between the counterweight and lifting components, and uses a lifting drive component to achieve reverse motion in lifting height. This allows the drive motor to overcome only the net load, rather than the full load, reducing the drive motor's lifting energy consumption and improving the system's energy conversion efficiency, thereby enhancing economic benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the three sets of weight lifting devices in the present invention.

[0021] Figure 2 for Figure 1 Side view of the center facing the direction of lifting the component;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the lifting device for the middle and intermediate heavy blocks and the matching counterweight components;

[0023] Figure 4 This is a schematic diagram of the transverse trolley.

[0024] Figure 5 A schematic diagram of the structure for the matching combination of the traveling component and the track component;

[0025] Figure 6 A structural diagram showing the combination of the lifting drive assembly, hoisting assembly, and counterweight assembly;

[0026] Figure 7 for Figure 6 A structural diagram from another perspective;

[0027] Figure 8 This is a structural diagram of a counterweight assembly when several counterweight blocks are connected.

[0028] Figure 9 This is a schematic diagram of the counterweight assembly in an unloaded state.

[0029] Figure 10 A schematic diagram of the structure of the various components in the counterweight assembly.

[0030] In the diagram: A. Heavy block lifting device, 1. Truss, 2. Lateral trolley, 21. Trolley platform, 211. Slide rail, 22. Traveling assembly, 221. Trolley connecting frame, 222. Traveling motor, 223. Drive gear, 224. Slider, 23. Track assembly, 231. Mounting plate, 232. Slide rail, 233. Rack, 234. Limiting plate, 3. Lifting assembly, 31. Guide frame, B. Counterweight assembly, 41. Counterweight block, 411. Positioning groove, 42. Bearing frame, 421. Limiting wheel group, 422. Bearing boss, 423. Adjusting motor, 43. Placement frame, 44. Lifting guide rail, 45. Fixed support frame, 51. Drive motor, 52. Traction wheel, 53. Wire rope, 541. Fixed pulley, 542. Moving pulley, 6. Energy storage heavy block. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-10 A gravity energy storage yard tandem lifting system includes a central controller, three sets of parallel heavy block lifting devices A, and a set of counterweight components B. Each heavy block lifting device A includes a truss 1, a lifting assembly 3, and a lifting drive assembly. The lifting drive assembly of each set of heavy block lifting devices A has the same structure.

[0033] The inner side of truss 1 is set up as an energy storage block yard. One end of each set of lifting drive components is powered by the corresponding set of hoisting components 3, and the other end is powered by the counterweight component B. Both the lifting drive components and the counterweight component B are controlled by the main controller. The main controller controls the operation of the lifting drive components synchronously. The main controller controls the lifting height of the hoisting components 3 and the counterweight component B by controlling the running direction of the lifting drive components.

[0034] When multiple lifting devices A are arranged in a row, in order to reduce the connection distance between the lifting drive components on both sides, preferably, the counterweight component B is located in the middle of the row of lifting devices A on the side opposite to the lifting direction, such as... Figure 1 As shown, in this embodiment, the counterweight component B is located on one side of the intermediate weight lifting device A. The lifting drive component of the intermediate weight lifting device A is connected to the counterweight component B at the shortest distance. The distances between the two weight lifting devices A and the counterweight component B are approximately the same.

[0035] The counterweight assembly B includes a fixed support frame 45, a load-bearing frame 42 disposed within the fixed support frame 45, and a counterweight block 41 disposed at the bottom of the fixed support frame 45.

[0036] The heavy block lifting device A also includes a transverse trolley 2, and a lifting assembly 3 is set on the transverse trolley 2. The transverse trolley 2 is assembled on the truss 1 and drives the lifting assembly 3 to achieve transverse translation. The lifting drive assembly includes a drive motor 51, a traction wheel 52, and a wire rope 53. The traction wheel 52 is rotatably installed on the truss 1 and is powered by the drive motor 51. One end of the wire rope 53 is fixed to the truss 1, and the other end is connected to the transverse trolley 2, the lifting assembly 3, and the traction wheel 52 in sequence through multiple pulleys and is fixedly connected to the counterweight assembly B.

[0037] In this embodiment, the lifting drive component, lifting component 3, and traverse trolley 2 of each set of heavy block lifting devices A are all controlled by the main controller, and the main controller performs synchronous control on the lifting drive component, lifting component 3, and traverse trolley 2 of each set of heavy block lifting devices A. The initial position and running posture of each lifting component 3 are the same.

[0038] The initial position and state of the lifting components 3 of each set of heavy block lifting devices A are set to be the same to ensure consistency of the initial state. Preferably, the three sets of heavy block lifting devices A have the same structure, that is, the transverse trolley 2, the lifting components 3, and the lifting drive components have the same structure. The three sets of heavy block lifting devices A are arranged side by side to form a row of lifting groups. The corresponding lifting components 3, transverse trolley 2, and traction wheels 52 are connected in series by each set of wire ropes 53 and then connected to a common counterweight component B. The common counterweight component B restricts the lifting control of multiple sets of lifting components 3. Due to the connection, the lifting height of the counterweight component B is synchronized in the opposite direction to the lifting components 3. When there is a slight difference in the synchronization control of the drive motor 51, it can also be controlled by the counterweight component B. The system is adjusted to ensure consistency in the running and lifting directions of all wire ropes 53. When the drive motor 51 drives the lifting assembly 3 or the counterweight assembly B to a certain height through each set of wire ropes, the main controller controls all drive motors 51 to stop synchronously, that is, the wire ropes 53 are in a stationary state. The heights of the lifting assembly 3 and the counterweight assembly B are constant. The main controller controls the lateral trolley 2 to move synchronously on the static wire ropes 53, achieving consistency in the lateral direction. The main controller synchronously controls the lifting assembly 3, achieving consistency in gripping, thereby realizing the synchronous movement of the three sets of heavy block lifting devices A. This reduces the installation of counterweight equipment, lowers project costs, and improves the synchronous and coordinated control of multiple sets of heavy block lifting.

[0039] To facilitate the rapid loading and unloading of energy storage blocks from multiple carriages of a railcar, the lifting assembly 3 includes multiple grippers. To reduce the impact of the truss 1 columns on the spacing arrangement between the lifting assemblies 3, a loading and unloading rail is installed inside the truss 1. The gripper groups of multiple block lifting devices A are spaced equally, and a transport train cooperating with the lifting assembly 3 runs on the loading and unloading rail. This enables the entire row of transport trains to be gripped and unloaded, significantly shortening the transfer time and improving the response speed of the energy storage system. It is suitable for large-scale gravity energy storage power stations and meets the needs of high-frequency, large-volume block lifting.

[0040] In this embodiment, the truss 1 is welded from steel structural materials to form a stable support structure, which is then used to support the various components involved in the lifting device. The inner side of the truss 1 is hollow to serve as an energy storage yard for arranging and stacking energy storage blocks 6, while ensuring that the railcar carrying the energy storage blocks 6 can pass or stop. The lifting device is used to realize the transfer operation of the energy storage blocks 6 between the energy storage yard and the train car. The train is used to load the energy storage blocks 6 and transport them back and forth between the upper and lower material yards to meet the operational requirements of energy storage and power generation.

[0041] The traverse trolley 2 can move laterally on the truss 1 to align the lifting assembly 3 laterally with each row of stacked energy storage blocks 6. After the lifting assembly 3 clamps the corresponding energy storage blocks 6 and lifts them upward by the lifting drive assembly, the traverse trolley 2 can drive the lifting assembly 3 and the clamped energy storage blocks 6 to move synchronously, thereby realizing the stable transfer of the energy storage blocks 6 between the train car and the energy storage yard.

[0042] The lifting assembly 3 moves stably up and down in the vertical direction on the transverse trolley 2, effectively aligning and clamping the energy storage weight 6 and adjusting its height.

[0043] For each lifting drive assembly, the main controller controls each drive motor 51 to perform the same rotational motion, driving the traction wheel 52 to rotate clockwise or counterclockwise, thereby driving the wire rope 53 to run in the corresponding direction, so as to achieve reverse adjustment of the height position of the lifting assembly 3 and the counterweight assembly B.

[0044] When the drive motor 51 drives the traction wheel 52 to rotate counterclockwise, the lifting assembly 3 is driven upward by the wire rope 53. At the same time, the counterweight assembly B is driven downward by multiple sets of wire ropes 53. When the drive motor 51 drives the traction wheel 52 to rotate clockwise, the lifting assembly 3 moves steadily downward under its own weight and the traction of the wire rope 53. At this time, the counterweight assembly B is driven upward by the wire rope 53.

[0045] For hoisting stability and safety, at least two wire ropes 53 are provided. When the counterweight component B and the heavy block lifting device A are not arranged in a straight line, the wire rope 53 on the heavy block lifting device A is connected to the counterweight component B through a turning arrangement. Guide pulleys are arranged at the turning position and the guide positions before and after the turning position. The guide pulleys at the turning position and the guide positions before and after the turning position are equipped with stepped guide rope grooves to guide the wire rope 53 to turn. This is mainly to avoid the possible friction, squeezing or jumping of multiple parallel wire ropes 53.

[0046] In this embodiment, the counterweight assembly B includes a counterweight block 41, a fixed support frame 45, and a bearing frame 42 disposed within the fixed support frame 45 for gripping the counterweight block 41. The counterweight block 41 is placed directly below the bearing frame 42. Each wire rope 53 passes through the bearing frame 42 and is fixed to the fixed support frame 45. The pulleys include a fixed pulley 541 and a movable pulley 542. Movable pulleys 542 are mounted on the lifting assembly 3 and the bearing frame 42. Fixed pulleys 541 are mounted on the transverse trolley 2, the truss 1, and the fixed support frame 45. The lifting assembly 3 and the bearing frame 42 are suspended on the transverse trolley 2 and the fixed support frame 45 respectively by the wire ropes 53 passing around the corresponding movable pulleys 542.

[0047] Since both ends of the wire rope 53 are fixed to the truss 1 and the fixed support frame 45, during the movement of the transverse trolley 2, only the fixed pulley 541 on the transverse trolley 2 and the movable pulley 542 on the lifting assembly 3 move synchronously with the transverse trolley 2. When the traction wheel 52 and the drive motor 51 stop rotating, neither the lifting assembly 3 nor the counterweight assembly B moves up or down.

[0048] When the system is running, an energy storage block 6 of appropriate mass can be selected and hoisted onto the train according to the power generation demand to carry out the subsequent power generation process. This helps the energy storage system to better match the power demand of the power user, reduce energy waste caused by excessive power generation, or power instability caused by insufficient power generation.

[0049] This tandem lifting system can be arranged in multiple groups side by side to enable the synchronous loading and unloading of energy storage weights 6 from multiple carriages of a railcar, thereby effectively improving the transfer efficiency of energy storage weights 6.

[0050] To ensure that the traveling trolley can be stably assembled on the truss 1 in a relatively movable manner and to achieve stable travel of the traveling trolley, the following technical solution is provided.

[0051] The traverse trolley 2 includes a trolley platform 21, a traveling component 22, and a track component 23. The traveling component 22 is mounted on both sides of the trolley platform 21, and the track component 23 is fixedly installed on the truss 1 and is matched with the traveling component 22.

[0052] The traveling component 22 works in conjunction with the track component 23 to drive the trolley platform 21 to move horizontally and stably along the track component 23, thereby driving the lifting component 3 and the energy storage weight 6 held therein to move synchronously. A slide rail 211 arranged in the vertical direction is fixedly installed on the trolley platform 21, and a guide frame 31 that is slidably inserted into the slide rail 211 is fixedly installed on the top of the lifting component 3 to achieve the design requirement of stable lifting and lowering of the lifting component 3 in the vertical direction.

[0053] To provide a specific combination of the traveling component 22 and the track component 23, and to achieve stable travel of the trolley platform 21, the following technical solution is provided.

[0054] The traveling component 22 includes a trolley connecting frame 221, a traveling motor 222, a drive gear 223, and a slider 224. The trolley connecting frame 221 is fixedly installed on both sides of the bottom of the trolley platform 21. The traveling motor 222 is fixedly installed on the trolley connecting frame 221 and is poweredly connected to the drive gear 223. The slider 224 is fixedly installed on the bottom of the trolley connecting frame 221.

[0055] The track assembly 23 includes a mounting plate 231, a slide rail 232, and a rack 233. The mounting plate 231 is fixedly installed on both sides of the top of the truss 1. The slide rail 232 and the rack 233 are fixedly installed on the mounting plate 231. The drive gear 223 on the same side is meshed with the rack 233, and the slider 224 on the same side is in a sliding combination with the slide rail 232.

[0056] The trolley connecting frame 221 is used to realize the stable installation of the travel motor 222, drive gear 223, and slider 224 on the trolley platform 21, while the mounting plate 231 is used to realize the stable assembly of the slide rail 232 and rack 233 on the truss 1.

[0057] When the travel motors 222 on both sides of the control vehicle platform 21 rotate synchronously, they can drive the corresponding drive gears 223 to rotate synchronously. Specifically, when the racks 233 on both sides are symmetrically arranged, the two sets of travel motors 222 need to be controlled to drive the drive gears 223 to rotate in opposite directions. When the racks 233 on both sides are arranged in the same direction, the two sets of travel motors 222 need to be controlled to drive the drive gears 223 to rotate in the same direction. Both can ensure that the vehicle platform 21 moves stably in the lateral direction.

[0058] The combination of slider 224 and slide rail 232 can ensure the stable lateral movement of the trolley platform 21, while the combination of drive gear 223 and rack 233 can provide power for the movement of the trolley platform 21.

[0059] It should also be noted that limiting plates 234 arranged at both ends of the slide rail 232 are fixed on the mounting plate 231, which can effectively prevent the slider 224 from derailing, so as to ensure the safety and reliability of the transverse trolley 2 during operation.

[0060] To ensure that the counterweight component B can be stably assembled on the truss 1 and to realize the counterweight adjustment and power connection with the lifting drive component, the following technical solution is provided.

[0061] like Figure 1 As shown, three sets of heavy block lifting devices A share a set of counterweight components B. Three movable pulleys 542 are installed on the bearing frame 42 of the counterweight components B, and three fixed ends of steel wire ropes 53 are provided on its fixed support frame 45. After the steel wire rope 53 of each set of heavy block lifting devices A passes through the corresponding movable pulley 542, the end of the steel wire rope 53 is fixed to the fixed support frame 45.

[0062] The counterweights 41 are stacked and placed directly below the support frame 42. The support frame 42 is symmetrically provided with counterweight lifting components on both sides for lifting and fixing the counterweights 41. The counterweight lifting components are controlled by the main controller.

[0063] The fixed support frame 45 is symmetrically provided with lifting guide rails 44 on its two inner sides facing the bearing frame 42. The two sides of the bearing frame 42 are slidably connected to the corresponding sides of the lifting guide rails 44. The upper and lower ends of the bearing frame 42 are rotatably installed with limit wheel sets 421 that keep in contact with the lifting guide rails 44. The placement frame 43 is fixedly installed under the fixed support frame 45 and arranged at the bottom of the lifting guide rails 44. The counterweights 41 are stacked on the placement frame 43 and arranged inside the bearing frame 42. The placement frame 43 can realize the stable stacking of the counterweights 41 along the height direction. The cooperation between the lifting guide rails 44 and the limit wheel sets 421 can realize the stable lifting and lowering of the bearing frame 42 along the vertical direction. When the lifting drive component is running, it can drive the lifting component 3 and the bearing frame 42 to move in opposite directions.

[0064] To ensure that the load-bearing frame 42 can move stably up and down along the lifting guide rail 44, and to ensure that the load-bearing frame 42 can effectively clamp a specific number or weight of counterweights 41, the following technical solution is provided.

[0065] The counterweight lifting component includes a bearing boss 422 and an adjusting motor 423. The bearing boss 422 is installed on the inner side of the bearing frame 42 and is poweredly connected to the adjusting motor 423. The adjusting motor 423 can drive the bearing boss 422 to extend and retract towards the counterweight 41. The two ends of the counterweight 41 are provided with positioning grooves 411 that are nested with the bearing boss 422.

[0066] The adjusting motor 423 drives the bearing boss 422 to move horizontally and retract through a crank-connecting rod mechanism, a gear and rack mechanism, or a lead screw mechanism. When the bearing boss 422 extends inward, it can be nested and inserted into the positioning grooves 411 on both sides of the counterweight block 41 at the corresponding height. When the bearing frame 42 is driven to move up and down by the lifting drive component, it can lift the positioned counterweight block 41 and all the counterweight blocks 41 on it, thereby connecting a specific number and weight of counterweight blocks 41, realizing the linkage combination with the lifting component 3.

[0067] When the energy storage system starts working, all counterweights 41 are placed on the counterweight placement rack 43. After the main controller determines which mass of energy storage counterweight 6 to use for power generation, it calculates how many counterweights 41 are needed for the operation of the tandem lifting system. The support frame 42 moves downward to the required height under the action of multiple sets of lifting drive components. The main controller controls the support boss 422 to extend and engage in the positioning grooves 411 on both sides of a certain counterweight 41 under the drive of the adjusting motor 423. When the support frame 42 moves upward, the counterweight 41 engaged by the support boss 422 and several counterweights 41 on it are lifted together. The total mass of these counterweights 41 is the counterweight mass required for this operation.

[0068] If a single lifting unit lifts component 3 with a weight of 2t, and a single lifting block with a weight of 8t, then the total load on the drive motor 51 during lifting is 10t, and 2t when unloaded. If a counterweight component B with a weight of 6t is added, the total load on the drive motor 51 during lifting is 4t, and also 4t when unloaded, significantly reducing the total load and making the force on the wire rope 53 more balanced. Therefore, adding counterweight component B during lifting can balance the weight of lifting component 3 and the energy storage block 6, reducing the lifting energy consumption of the drive motor 51, improving the energy conversion efficiency of the system, and thus enhancing economic benefits.

[0069] When hoisting energy storage blocks 6 of different masses, the counterweight component B automatically adjusts the number of counterweight blocks 41, which can better adapt to the changes in power generation demand when the energy storage system is working.

[0070] The specific control steps for the lifting system are as follows:

[0071] a. Obtain the lifting weight information of the energy storage block and send it back to the main controller;

[0072] b. After obtaining the weight information of the energy storage block, the main control controls the rotation direction of all lifting drive components, so that the counterweight component B moves down and lifts the number of counterweights that match the weight of the energy storage block.

[0073] c. The main controller controls all the lateral trolleys to move horizontally, bringing all the lifting components to the lateral position of the energy storage block to be lifted;

[0074] d. After the lifting component is positioned laterally to the energy storage block to be lifted, the main controller controls the rotation direction of all lifting drive components, lowering the lifting component to the longitudinal position of the energy storage block to be lifted and clamping it.

[0075] f. After clamping, the main controller controls the rotation direction of all lifting drive components to drive the energy storage block upward, and starts the transverse trolley to lift the energy storage block to the specified position.

[0076] g. After the main controller obtains the same energy storage weight information as in step a, it returns to step c to perform a new energy storage weight lifting task; if the main controller obtains different energy storage weight information than in step a, it returns to step a.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gravity energy storage yard tandem lifting system, characterized in that, It includes a main controller and at least two sets of parallel heavy block lifting devices (A), each of the heavy block lifting devices (A) including a lifting assembly (3) and a lifting drive assembly. Each lifting drive assembly has the same structure, with one end powered by the corresponding lifting assembly (3) and the other end connected to the same counterweight assembly (B). Both the lifting drive assembly and the counterweight assembly (B) are controlled by a central controller. The central controller controls the synchronous operation of all lifting drive assemblies to adjust the height of the lifting assembly (3) and the counterweight assembly (B). The heavy block lifting device (A) includes a truss (1) and a transverse trolley (2). The transverse trolley (2) is assembled onto the truss (1) and moves laterally. The lifting assembly (3) is assembled onto the transverse trolley (2). The lifting drive assembly includes a drive motor (51), a traction wheel (52), and a steel wire rope (53). The traction wheel (52) is rotatably mounted on the truss (1) and powered by the drive motor (51). One end of the steel wire rope (53) is fixed to the truss (1), and the other end is connected to the transverse trolley (2), the lifting assembly (3), and the traction wheel (52) in sequence through multiple pulleys and is fixedly connected to the counterweight assembly (B). When the counterweight assembly (B) and the heavy block lifting device (A) are not arranged in a straight line, the wire rope (53) on the heavy block lifting device (A) is connected to the counterweight assembly (B) through a turning arrangement. Guide pulleys are arranged at the turning position and the guide positions before and after the turning position.

2. The gravity energy storage yard tandem lifting system as described in claim 1, characterized in that, When multiple weight lifting devices (A) are arranged in a row, the counterweight assembly (B) is located in the middle of the row of weight lifting devices (A) on the side opposite to the lifting direction.

3. The gravity energy storage yard tandem lifting system as described in claim 2, characterized in that: The guide pulleys at the turning position and the front and rear guide positions are equipped with stepped guide rope grooves for turning and guiding the wire rope (53).

4. The gravity energy storage yard tandem lifting system as described in claim 2, characterized in that: The lifting drive assembly, lifting assembly (3), and traverse trolley (2) of each set of heavy block lifting devices (A) are all controlled by the main controller, and the main controller performs synchronous control on the lifting drive assembly, lifting assembly (3), and traverse trolley (2) of each set of heavy block lifting devices (A). The initial position and running posture of each lifting assembly (3) are the same.

5. A gravity energy storage yard tandem lifting system as described in claim 4, characterized in that: The lifting assembly (3) includes multiple grippers, and the gripper groups of multiple heavy block lifting devices (A) are spaced equally. The truss (1) is equipped with a loading and unloading rail, and a transport train that cooperates with the lifting assembly (3) runs on the loading and unloading rail.

6. The gravity energy storage yard tandem lifting system as described in claim 2, characterized in that: The counterweight assembly (B) includes a counterweight block (41), a fixed support frame (45), and a load-bearing frame (42) disposed within the fixed support frame (45) for gripping the counterweight block (41). The counterweight block (41) is placed directly below the load-bearing frame (42), and each of the steel wire ropes (53) passes through the load-bearing frame (42) and is fixed to the fixed support frame (45).

7. A gravity energy storage yard tandem lifting system as described in claim 6, characterized in that: The pulleys include fixed pulleys (541) and movable pulleys (542). The movable pulleys (542) are installed on the lifting assembly (3) and the bearing frame (42). The fixed pulleys (541) are installed on the transverse trolley (2), the truss (1) and the fixed support frame (45). The lifting assembly (3) and the bearing frame (42) are suspended on the transverse trolley (2) and the fixed support frame (45) respectively by passing the corresponding movable pulleys (542) through the steel wire rope (53).

8. A gravity energy storage yard tandem lifting system as described in claim 7, characterized in that: The load-bearing frame (42) is symmetrically provided with counterweight lifting components on both sides for lifting and fixing the counterweight blocks. The counterweight lifting components are controlled by the main controller.

Images