A stacked and spliced horizontal rotary gravity flow energy storage system

Abstract

The present application relates to a stacked horizontal rotary gravity flow energy storage system, comprising: a carrier cable mechanism, a carrier mechanism, a driving mechanism and a steering mechanism; the carrier cable mechanism includes multiple closed-loop carrier cables, the multiple carrier cables are spaced at different heights and stacked vertically, and can operate continuously under the drive of the driving mechanism; the carrier cables are horizontally rotated and deflected at the driving mechanism and the steering mechanism to form an upper branch carrier cable and a lower branch carrier cable arranged in parallel; the carrier cables are connected by a plurality of carrier mechanisms that can run along their closed loops, and the carrier mechanisms are used to carry energy storage blocks as energy storage carriers; the driving mechanism is connected with an electric power generation mechanism, and the energy storage blocks at the bottom stacking yard are continuously lifted by the driving mechanism to form a continuous gravity flow, and, the gravitational potential energy is converted into electric energy of the electric power generation mechanism by the continuous descent of the energy storage blocks at the top stacking yard to form a continuous energy flow.

Description

Technical Field

[0001] This application relates to the technical field of gravity energy storage, and more particularly, to a stacked horizontal rotary gravity flow energy storage system. Background Art

[0002] In recent years, the electricity demand in China has maintained a steady growth trend, and the proportion of new power generation technologies such as wind power / solar power in energy utilization has also been gradually increasing. However, renewable energy dominated by wind power and solar power has the characteristics of randomness, volatility and intermittency, and cannot fully meet the social electricity demand. Therefore, it is necessary to use an energy storage system to regulate the demand for power generation and power consumption, and energy storage technology has become a key means to balance supply and demand and ensure the stability of the power grid.

[0003] Traditional pumped-storage energy storage is limited by geographical conditions and water resources and is difficult to be promoted in water-scarce and complex terrain areas. There is an urgent need for new energy storage technologies to break through this limitation. Electrochemical energy storage, such as lithium-ion batteries, has problems such as dependence on lithium resources raw materials and safety risks. In this context, gravity energy storage is regarded as an important supplementary technology due to its advantages such as not relying on water resources, flexible site selection, and a long lifespan of up to 50 years. Gravity energy storage, as a new type of physical energy storage technology, realizes energy storage through the conversion of the potential energy of solid weights and has characteristics such as flexible site selection and environmental friendliness. Slope-type gravity energy storage combined with the natural terrain of mountains or abandoned mines has become an important direction to break through traditional limitations. In recent years, domestic and foreign scientific research institutions and enterprises have accelerated their layout, have built prototype machines, and have planned demonstration projects, verifying the feasibility of the technology. However, there are still the following technical problems:

[0004] The problem of limited bearing capacity. Existing slope-type systems mostly use a single-cable structure as the main carrier device for energy storage blocks, but the mechanical strength of the structure limits its bearing capacity.

[0005] The problem of low payload. Existing slope-type systems mostly use a chain structure as the carrier device for energy storage blocks, but the self-weight of the chain is relatively large, reducing the payload of the lifting weight and limiting the power generation efficiency.

[0006] The problem of real-time load matching. During a single power generation process, the weight of the heavy object is fixed, so the power generation power is also fixed and cannot be dynamically adjusted according to the actual load demand. Summary of the Invention

[0007] The purpose of this application is to provide a stacked horizontal rotary gravity flow energy storage system that can solve the existing technical problems of the above gravity energy storage system.

[0008] To achieve the above purpose, the present invention provides a stacked horizontal rotary gravity flow energy storage system, including: a carrier cable mechanism, a carrier mechanism, a driving mechanism, and a steering mechanism;

[0009] The carrier cable mechanism includes multiple carrier cables that are enclosed and looped between the driving mechanism and the steering mechanism. The multiple carrier cables are spaced vertically at different heights and stacked one above the other, and can operate continuously under the drive of the driving mechanism.

[0010] The carrier cables are horizontally rotated and redirected at the driving mechanism and the steering mechanism, forming upper branch carrier cables and lower branch carrier cables that are arranged in parallel between the top stacking yard and the bottom stacking yard.

[0011] The carrier cables are connected by multiple carrier mechanisms that can run along their closed loops. The carrier mechanisms are used to carry energy storage blocks as energy storage carriers.

[0012] The driving mechanism is connected with an electric power generation mechanism. By the driving mechanism, the energy storage blocks located in the bottom stacking yard are continuously lifted to form a continuous gravity flow, and, by the continuous descent of the energy storage blocks located in the top stacking yard, the gravitational potential energy is converted into the electric energy of the electric power generation mechanism to form a continuous energy flow.

[0013] In an optional embodiment, the carrier mechanism includes a connecting part and a bearing part. The connecting part is used to connect with the carrier cable, and the bearing part is connected below the connecting part for disassembling and connecting the energy storage block.

[0014] In an optional embodiment, the connecting part includes balance plate boxes corresponding to the carrier cables one by one. A rope connecting device is connected to the side of the balance plate box, and the rope connecting device is fixedly connected with the carrier cable. An equalizing rod is movably inserted through the balance plate boxes.

[0015] The connection point of the rope connecting device and the carrier cable and the center of the energy storage block are located on the same vertical line.

[0016] In an optional embodiment, the top end of the equalizing rod extends upward from the topmost balance plate box, and the bottom end extends downward from the bottommost balance plate box. A compression spring is sleeved outside the equalizing rod and inside the balance plate box.

[0017] A spring limiting frame for accommodating the compression spring is arranged inside the balance plate box. The bottom end of the compression spring abuts against the bottom wall of the spring limiting frame, and the top end abuts against a pressure plate. The pressure plate is limited and fixed on the equalizing rod by a locking nut located above it. The equalizing rod includes a threaded section, and the locking nut is threadedly connected to the threaded section.

[0018] A stop block is connected to the equalizing rod and located outside the bottom of the balance plate box.

[0019] The equalizing bar uses the compression spring to evenly distribute the load of the energy storage block borne by the equalizing bar to the upper and lower rope connecting devices, and transmits it to the upper and lower carrier ropes, so as to achieve the load balance of the two carrier ropes.

[0020] In an alternative embodiment, the bearing part includes a bearing hook and a suspension bracket. The bearing hook is connected to the bottom end of the equalizing bar, the suspension bracket is hinged to the bottom end of the bearing hook, and the energy storage block is detachably connected to the suspension bracket.

[0021] In an alternative embodiment, the driving mechanism is arranged in the top stacking yard, and the steering mechanism is arranged in the bottom stacking yard;

[0022] Or, the driving mechanism is arranged in the bottom stacking yard, and the steering mechanism is arranged in the top stacking yard;

[0023] Or, the driving mechanism is arranged in both the top stacking yard and the bottom stacking yard.

[0024] In an alternative embodiment, the upper carrier rope and the lower carrier rope are parallel and inclined upward, and each includes a horizontal rope segment and an inclined rope segment located on both the top and bottom sides. A guiding mechanism is arranged between the horizontal rope segment and the inclined rope segment. The guiding mechanism includes a set of guiding wheel groups arranged in an arc shape for making the carrier rope change from horizontal to inclined or from inclined to horizontal.

[0025] In an alternative embodiment, the driving mechanism includes a double-wheel driving mechanism. The double-wheel driving mechanism includes two driving wheels arranged in parallel and a vertical transmission shaft. The two driving wheels are horizontally installed on the vertical transmission shaft;

[0026] The electric power generating mechanism includes an electric generator. The electric generator includes an output shaft, and the output shaft is connected to one end of the vertical transmission shaft through a coupling;

[0027] Or, the electric power generating mechanism includes a generator and a motor. The generator and the motor each include an output shaft, and the output shafts are respectively connected to the vertical transmission shaft through couplings;

[0028] The carrier rope includes an upper carrier rope and a lower carrier rope with a high-low interval. The two carrier ropes respectively surround the corresponding driving wheels, and are used to make the driving wheels drive the carrier ropes to run through the frictional force of circumferential contact, or make the carrier ropes drive the driving wheels to run.

[0029] In an alternative embodiment, the steering mechanism includes two horizontally installed steering wheels arranged in parallel. The steering wheels have the same structure as the driving wheels and the wheel surfaces of the steering wheels are parallel to the wheel surfaces of the driving wheels;

[0030] Each of the carrying ropes is closed and looped between the driving wheels and the steering wheels that correspond to each other in a group. Wheel grooves are respectively provided on the wheel surfaces of the driving wheels and the steering wheels, and the carrying ropes are compressed and looped in the wheel grooves.

[0031] In an optional embodiment, the rope connecting device includes a fixing device fixed to the carrying rope, and the fixing device includes a fixing claw with a jaw, and the carrying rope is fixedly installed in the jaw.

[0032] In an optional embodiment, the carrying mechanism is equidistantly connected to the carrying rope;

[0033] The energy storage blocks correspond to the carrying mechanisms one by one, or the energy storage blocks correspond to the carrying mechanisms at intervals. The traveling speed of the carrying mechanisms following the carrying ropes is adjustable, thereby achieving adjustable gravity flow.

[0034] In an optional embodiment, the stacked horizontal rotary gravity flow energy storage system includes multiple sets, and the multiple sets of the stacked horizontal rotary gravity flow energy storage systems are arranged in multiple rows in parallel and / or stacked up and down on the hillside terrain.

[0035] The stacked horizontal rotating gravity flow energy storage system in this application can achieve distributed load-bearing of gravity energy storage blocks, avoid single-point overload, and improve the safety of system operation.

[0036] The load-bearing capacity limit of a single cable structure can be broken through by using multiple carrier cables. At the same time, the effective load during transportation can be increased through the form of carrier cables to ensure power generation efficiency.

[0037] Under the premise of multiple carrying ropes for carrying and transporting, necessary load balancing structures are set up at the same time to balance the loads between the carrying ropes, thus ensuring the safety and reliability of the system.

[0038] The mutual cooperation of the carrying rope mechanism, the driving mechanism and the steering mechanism can form continuous steady-state operation of multiple carrying mechanisms during the operation of the driving mechanism. Combined with the carrying of the energy storage block by the carrying mechanism, stable and continuous gravity flow and energy flow can be obtained in the energy storage stage and the discharge stage. Under the premise of improving the carrying capacity, high-efficiency operation of the energy storage and power generation states is guaranteed, and high-power storage / discharge of electric energy can be realized.

[0039] Compared with the common single-cable transportation, the stacked horizontal rotating gravity flow energy storage system in this application has a stronger carrying capacity, a more balanced load, and a more stable operating posture, making the process of forming continuous gravity flow and energy flow more stable and reliable.

[0040] The gravity flow energy storage system in this application can form a continuous and steady gravity flow and energy flow. By adjusting the rotation speed of the electric generator and the hanging interval of the energy storage blocks, it can arbitrarily adjust the power consumption or power generation in real time, and then achieve the functions of "slow charge and fast discharge" or "charge and discharge on demand".

[0041] Combining multiple sets of gravity flow energy storage systems to achieve parallel multi-module and / or upper and lower stacked layout according to the hillside terrain can achieve a larger scale of energy storage.

[0042] In the stacked horizontal rotary gravity flow energy storage system of the present invention, a carrier cable is used instead of a chain to transport the gravity energy storage blocks. The strength of the carrier cable, such as a wire rope or a high-strength composite material rope, is much higher than that of the traditional chain, can carry energy storage blocks with a larger mass, and can increase the power generation per unit time. At the same time, the material density of the carrier cable is smaller, the weight is lighter, and the energy loss during lifting is less.

[0043] Using multiple carrier cables to transport the gravity energy storage blocks, simultaneously towing and driving the energy storage blocks to move and bearing the load of the energy storage blocks. The multi-cable system reduces the load borne by a single cable, ensuring the safety and reliability of the system. The reduction of the cable load means that more energy storage blocks can be transported synchronously, improving the system's transportation capacity, ensuring the high-efficiency operation of the energy storage and power generation states, and enabling high-power storage / discharge of electric energy.

[0044] Through the balance rod, the load of multiple carrier cables can be evenly distributed, and at the same time, the load can be self-adjusted between multiple carrier cables under special instability conditions, ensuring the safety and reliability of the system.

[0045] Other features and advantages of this application will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of this application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0047] Figure 1 It is a schematic diagram of the overall structure of the stacked horizontal rotary gravity flow energy storage system of this application;

[0048] Figure 2 It is a schematic diagram of the structure of the carrier mechanism of this application;

[0049] Figure 3 It is a schematic diagram of the structure of the balance rod and the balance plate box of this application;

[0050] Figure 4This is a schematic structural diagram of the rope connection mechanism of the present application.

[0051] Icon:

[0052] 1 - Carrier rope mechanism; 1a - Upper branch carrier rope; 1b - Lower branch carrier rope; 11 - Horizontal rope segment; 12 - Inclined rope segment;

[0053] 2 - Driving mechanism; 21 - Driving wheel; 22 - Vertical transmission shaft; 23 - Driving support; 24 - Transmission shaft mounting seat;

[0054] 3 - Steering mechanism; 31 - Steering wheel; 32 - Groove;

[0055] 4 - Carrier rope;

[0056] 5 - Carrier mechanism; 51 - Connection part; 511 - Balance plate box; 512 - Balance rod; 513 - Compression spring; 514 - Spring limit bracket; 515 - Pressure plate; 516 - Locking nut; 517 - Stopper; 518 - Connection seat;

[0057] 52 - Bearing part; 521 - Bearing hook; 522 - Hanger;

[0058] 6 - Energy storage block;

[0059] 7 - Electric power generation mechanism;

[0060] 8 - Rope connection device; 81 - Slewing bearing; 82 - Jaws;

[0061] 9 - Guide mechanism; 91 - Guide wheel set; Detailed implementation manners

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0063] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present application, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0065] The stacked horizontal rotary gravity flow energy storage system in the present application is mainly used in the field of gravity energy storage. Through the mutual cooperation of the carrier cable mechanism, the carrier mechanism, the drive mechanism, and the steering mechanism, the continuous operation of the energy storage carrier is realized, and then the continuous gravity flow and energy flow are realized.

[0066] By optimizing the structure and energy storage method of the existing gravity energy storage system, a continuous and stable gravity flow and energy flow are formed, and at the same time, space is created for the scale adjustment of the gravity flow and energy flow.

[0067] The carrier form of multiple carrier cables can avoid the risk of single-point stress concentration compared with single-cable carrier. At the same time, a load balancing structure is used to balance the loads between multiple carrier cables, ensuring the stability, safety, and reliability of the continuous gravity flow and energy flow.

[0068] See Figure 1 and in combination with Figures 2 - 4 In the stacked horizontal rotary gravity flow energy storage system of the present invention, the main structure includes a carrier cable mechanism 1, a carrier mechanism 5, a drive mechanism 2, and a steering mechanism 3. The main structure formed by the above different mechanisms is arranged between the top stacking yard and the bottom stacking yard.

[0069] The carrier cable mechanism 1 includes multiple carrier cables 4 that are closed and surrounded between the drive mechanism 2 and the steering mechanism 3. The multiple carrier cables 4 are spaced at different heights and stacked vertically, and can operate continuously under the drive of the drive mechanism 2. Through the multiple carrier cables 4 spaced at different heights and their state of continuous closed surrounding and operation between the drive mechanism 2 and the steering mechanism 3, a structural basis of multi-cable bearing can be formed, and the energy storage blocks 6 can be continuously carried by the carrier mechanism 5 connected to the multiple carrier cables 4 at the same time.

[0070] The carrier cables 4 are horizontally rotated and deflected at the drive mechanism 2 and the steering mechanism 3, forming the upper branch carrier cable 1a and the lower branch carrier cable 1b arranged in parallel between the top stacking yard and the bottom stacking yard. Furthermore, the continuous lifting of the energy storage blocks 6 on the synchronous and continuous upper branch carrier cable 1a and the lower branch carrier cable 1b can be formed, so as to respectively form continuous gravity flow and energy flow.

[0071] Between the carrier cables 4, specifically between the upper carrier cable 1a and the lower carrier cable 1b, they are connected by a plurality of carrier mechanisms 5 that can run along their closed loops. The carrier mechanism 5 is used to carry the energy storage blocks 6 as energy storage carriers, and thus form a continuous gravity flow and energy flow through the lifting of the energy storage blocks 6.

[0072] The drive mechanism 2 is connected with an electric power generation mechanism 7. The drive mechanism 2 continuously lifts the energy storage blocks 6 located at the bottom stacking yard to form a continuous gravity flow, and, through the continuous descent of the energy storage blocks 6 located at the top stacking yard, converts the gravitational potential energy into the electric energy of the electric power generation mechanism 7 to form a continuous energy flow.

[0073] Through the stacked horizontal rotary gravity flow energy storage system in the present invention, a stable and continuous carrying state of the energy storage blocks 6 can be formed, and an effective continuous gravity flow and energy flow can be formed during the energy storage stage and the discharge stage. At the same time, it has stronger bearing capacity, more balanced load, and more stable running posture, making the formation process of the continuous gravity flow and energy flow more stable and reliable.

[0074] Based on the continuous carrying of the energy storage blocks 6 by the carrier mechanism 5, the carrier mechanism 5 specifically includes a connecting part 51 and a carrying part 52. The connecting part 51 is used to connect with the carrier cable 4, and the carrying part 52 is connected below the connecting part 51 and is used for the detachable connection of the energy storage blocks 6 on the carrying part 52.

[0075] From the form of the loads simultaneously connected by the same carrier mechanism 5 to multiple carrier cables 4 in this application, in order to balance the loads on the multiple carrier cables 4, the connecting part 51 includes balance plate boxes 511 corresponding to the carrier cables 4 one by one. A rope connecting device 8 is connected to the side of the balance plate box 511, and the rope connecting device is fixedly connected to the carrier cable 4 to ensure that the balance plate box 511 does not fall through the carrier cable 4.

[0076] An equalizing rod 512 is movably inserted between the balance plate boxes 511 to evenly balance the loads of the carrier mechanism 5 between the upper carrier cable 1a and the lower carrier cable 1b through the equalizing rod 512.

[0077] At the same time, in order to ensure the stability of the load, the connection point of the rope connecting device 8 and the carrier cable 4 and the center of the energy storage block 6 are located on the same vertical straight line, which can form a load distribution on the same vertical straight line, facilitating the balance and dispersion of the load in combination with the connection of the rope connecting device 8 and the carrier cable 4.

[0078] Based on the above structure, the load transfer is specifically carried out in sequence through the carrying part 52, the equalizing rod 512, the balance plate box 511, the rope connecting device 8, and the carrier cable 4. The load of the energy storage block 6 directly acts on the carrying part 52 and the equalizing rod 512 integrally connected thereto.

[0079] Further, from the perspective of the balanced distribution of the load between the upper support cable 1a and the lower support cable 1b, the top end of the balance rod 512 extends upward from the topmost balance plate box 511, and the bottom end extends downward from the bottommost balance plate box 511, enabling the balance plate box 511 to slide up and down relatively passively with respect to the balance rod 512.

[0080] Since the balance rod 512 is a vertical rod with a continuous structure, the load acting on the balance rod 512 will force it to move downward. A compression spring 513 is sleeved outside the balance rod 512 and inside the balance plate box 511.

[0081] At the same time, the balance rod 512 will cause the same compression deformation of the compression springs 513 in the balance plate boxes 511 distributed up and down. Further, the load is transmitted to the balance plate box 511 through the compression spring 513. Based on the fixed connection between the balance plate box 511 and the rope connecting device 8, the load received by the balance plate box 511 can be transferred and transmitted to the rope connecting device 8. Furthermore, the load received by the rope connecting device 8 is finally transmitted to the carrying cable 4 fixedly connected thereto.

[0082] Through the above structural arrangement and the transfer and transmission of the load, during the installation process of the energy storage block 6, the load of the energy storage block 6 can be evenly dispersed on multiple carrying cables 4, thereby avoiding single-point overload on the multiple carrying cables 4. On the premise of distributed bearing, the load of the energy storage block 6 can be evenly dispersed between the multiple carrying cables 4, maximizing the safety of the system operation.

[0083] During the initial installation, it is necessary to ensure that the forces at both ends of the balance rod 512 are the same, so the two compression springs 513 are set to have the same deformation. Since the compression spring 513 has a large bearing capacity and performs well in terms of stability and fatigue life, the compression spring 513 is used to balance the loads at both ends of the balance rod 512.

[0084] Since it is a compression spring 513, both ends of the spring need to be fixed. A spring limiting frame 514 for accommodating the compression spring 513 is provided inside the balance plate box 511. The bottom end of the compression spring 513 is fixedly abutted against the bottom wall of the spring limiting frame 514 inside the balance plate box 511, while the top end of the compression spring 513 is fixed through a pressure plate 515 and a locking nut 516.

[0085] Specifically, the top end of the compression spring 513 abuts against the pressure plate 515. The pressure plate 515 is limited and fixed on the balance rod 512 by the locking nut 516 located above it. The balance rod 512 includes a threaded section, and the locking nut 516 is threadedly connected to the threaded section.

[0086] The balancing rod 512 is connected to a stopper 517 at the positions of the two balancing plate boxes 511 to ensure that the spring is always compressed. By placing the stopper 517 on the outside of the bottom of the balancing plate box 511, the balancing rod 512 is limited to further upward movement at the stopper 517, maintaining the compression spring 513 in a securely compressed state.

[0087] By arranging the compression spring 513 as described above, the balancing rod 512 can cooperate with the balancing plate box 511 and the connection between the rope connecting device 8 and the carrying rope 4 to achieve balanced load distribution.

[0088] The balancing rod 512 distributes the energy storage block load borne by the balancing rod 512 evenly to the upper and lower rope connecting devices 8 through the compression spring 513, and transmits it to the upper branch carrying rope 1a and the lower branch carrying rope 1b, so as to achieve load balance of the upper branch carrying rope 1a and the lower branch carrying rope 1b.

[0089] In addition to the process of loading the energy storage block 6, when the energy storage block 6 is unloaded, the balancing rod 512 can generate the same displacement amount for the two compression springs 513, so that the different balancing plate boxes 511 can be reset in a balanced manner.

[0090] In addition to the balanced load distribution during normal operation, when the spacing between different carrying ropes 4 changes, which is more corresponding to the change in the tension of the carrying rope 4 or the influence of external forces such as wind, the balancing rod 512 can realize self-adjustment of the load.

[0091] During operation, when the elongation of the carrying rope 4 changes, the two balancing plate boxes 511 automatically adjust the elongation of the compression springs 513 to maintain a balanced load on the two carrying ropes 4. In a specific example, referring to the upper carrying rope 1a and lower carrying rope 1b, which are stacked and spaced apart in the figure, when the elongation of the lower carrying rope 1b increases (i.e., when the lower carrying rope 1b becomes loose), the lower balancing plate box 511 moves downward. At this time, the movement of the lower balancing plate box 511 causes the compression spring 513 inside it to rebound, reducing the force on the lower end of the balancing rod 512, causing the upper end of the balancing rod 512 to experience a greater force than the lower end. Consequently, the compression spring 513 inside the upper balancing plate box 511 pushes the balancing rod 512 downward, causing the compression spring 513 inside the upper balancing plate box 511 to rebound. The downward movement of the balancing rod 512 further compresses the compression spring 513 inside the lower balancing plate box 511, causing the force on the upper end of the balancing rod 512 to be less than that on the lower end, but the difference is smaller than before. The compression spring 513 inside the lower balancing plate box 511 pushes the balancing rod 512 upward, further compressing the compression spring 513 inside the upper balancing plate box 511. This cycle repeats until the forces on both ends of the balancing rod 512 are equal and balanced.

[0092] Similarly, when the upper carrying cable 1a extends longer—that is, when it becomes loose—the upper balancing plate box 511 moves downward. This movement of the upper balancing plate box 511 causes the compression spring 513 within it to rebound, reducing the force on the upper end of the balancing bar 512, resulting in a smaller force on the upper end than on the lower end. Consequently, the compression spring 513 within the lower balancing plate box 511 pushes the balancing bar 512 upward, causing the compression spring 513 within the lower balancing plate box 511 to rebound. This upward movement of the balancing bar 512 further compresses the compression spring 513 within the upper balancing plate box 511, causing the force on the upper end of the balancing bar 512 to be greater than that on the lower end, but the difference is smaller than before. The compression spring 513 within the upper balancing plate box 511 pushes the balancing bar 512 downward, further compressing the compression spring 513 within the lower balancing plate box 511. This cycle repeats until the forces at both ends of the balancing rod 512 are equal and balanced.

[0093] Through the connection part 51 including the balancing rod 512, the balancing plate box 511 and the compression spring 513 in this application, the load can be evenly distributed on the upper branch carrying rope 1a and the lower branch carrying rope 1b, and the load can be self-adjusted under special circumstances.

[0094] In the present invention, the energy storage block 6 is directly suspended and loaded by the load-bearing part 52. The load-bearing part 52 specifically includes a load-bearing hook 521 and a hanger 522. The load-bearing hook 521 is connected to the bottom end of the balancing rod 512, and can transfer the load of the energy storage block 6 to the balancing rod 512 through the hanger 522. At the same time, the hanger 522 is hinged to the bottom end of the load-bearing hook 521, which can maintain the relative deadweight adjustment of the center of gravity of the energy storage block 6. The energy storage block 6 is detachably connected to the hanger 522. Compared with the traditional detachable installation, by detachably connecting the energy storage block 6 to the hanger 522, the carrying structure can be simplified, the reliability of the system installation is ensured, and the maintenance cost is reduced.

[0095] From the perspective that the carrying rope 4 is continuously operated under the drive of the driving mechanism 2, the driving mechanism 2 is arranged at the top stacking yard, and the steering mechanism 3 is arranged at the bottom stacking yard, that is, the driving mechanism 2 is installed on a high-lying platform. Through this arrangement, the driving mechanism 2 can directly output and transfer the traction load to the carrying mechanism 5 and the energy storage block 6, thereby reducing the load of the energy storage system during the energy storage process and reducing the overall force load of the carrying rope 4. Compared with the traditional form of setting the driving mechanism 2 at the bottom, it can reduce the invalid load during bottom traction and improve the conversion rate during the energy storage process.

[0096] It should be noted that, in addition to adopting the top-up drive form with the highest economy, the bottom-down drive form can also be adopted. The drive mechanism 2 is arranged in the bottom stacking yard, and the steering mechanism 3 is arranged in the top stacking yard, so that the drive mechanism 2 is installed on the low-lying terrain platform to achieve bottom-down drive.

[0097] Or drive mechanisms 2 are arranged in both the top stacking yard and the bottom stacking yard, forming a form of simultaneous top-up drive and bottom-down drive, which can meet the lifting requirements of the carrying mechanism 5 and the energy storage blocks 6, and can be specifically set according to the actual situation.

[0098] From the perspective of the specific structure of the carrying cable 4, the upper carrying cable 1a and the lower carrying cable 1b are parallel and inclined upward, and respectively include horizontal cable segments 11 on both the top and bottom sides, and inclined cable segments 12 between the horizontal cable segments 11 on both the top and bottom sides. A guiding mechanism 9 is arranged between the horizontal cable segment 11 and the inclined cable segment 12. The guiding mechanism 9 includes a set of guiding wheel groups 91 arranged in an arc shape for the carrying cable to change from horizontal to inclined or from inclined to horizontal. Through the guiding wheel groups 91, the carrying cable 4 can smoothly pass through the connection part between the horizontal cable segment 11 and the inclined cable segment 12.

[0099] In terms of the structural composition of the drive mechanism 2, the gravity flow energy storage system in this application is specifically a double-wheel drive type gravity flow energy storage system, and the drive mechanism 2 is specifically a double-wheel drive mechanism 2. The double-wheel drive mechanism 2 includes two parallel drive wheels 21 and a vertical transmission shaft 22. The two drive wheels 21 are horizontally installed on the vertical transmission shaft 22.

[0100] The two parallel and horizontally installed drive wheels 21 can be arranged at intervals along the axial direction of the vertical transmission shaft 22. The interval space between the two drive wheels 21 constitutes the distance between the upper carrying cable 1a and the lower carrying cable 1b, and at the same time constitutes the horizontal rotation and steering space of the carrying mechanism 5 at the position of the drive wheels 21.

[0101] At the same time, the two parallel and horizontally installed drive wheels 21 can be surrounded by two carrying cables 4 with different heights at intervals, and at the same time, the carrying mechanism 5 can pass through the gap between the two drive wheels 21. At least a part of the carrying cable 4 is wound around the drive wheel 21. Combining the friction between the carrying cable 4 and the drive wheel 21, the drive wheel 21 can drive the carrying cable 4 to move stably and continuously during the rotation operation, ensuring the reliable stability of the continuous gravity flow and energy flow.

[0102] In one implementation form, the electric power generation mechanism 7 includes an electric generator, and the electric generator has both driving and discharging functions.

[0103] Based on the cooperation angle between the drive wheels 21, the upper support carrier cable 1a, and the lower support carrier cable 1b, the drive wheels 21 include a first active drive wheel 21 and a second active drive wheel 21, which are connected by a vertical transmission shaft 22. The two drive wheels 21 rotate synchronously, and the vertical transmission shaft 22 transmits power.

[0104] By connecting the output shaft of the electric generator to one end of the vertical transmission shaft 22 through a coupling, during the energy storage stage, the drive wheels 21 can be actively rotated through the driving function, and at the same time, the energy storage blocks 6 located at the bottom of the energy storage system can be lifted by the carrier mechanism 5 to form a continuous gravity flow.

[0105] At the same time, during the discharge stage, the drive wheels 21 can be passively rotated by the continuously descending energy storage blocks 6, so that during the descent of the lifted energy storage blocks 6, the potential energy-based gravity energy storage can be converted into electrical energy that can be generated by the electric power generation mechanism 7 to form a continuous energy flow through the discharge function.

[0106] In another specific implementation form, the electric power generation mechanism 7 includes a generator and a motor. The generator and the motor respectively include output shafts, and the output shafts are respectively connected to the vertical transmission shaft 22 on which the drive wheels 21 are independently installed through couplings, and the above technical effects can also be achieved.

[0107] In this application, the specific form of the electric power generation mechanism 7 is not limited. When independently controlling the drive wheels 21, one of the drive wheels 21 is connected to the motor, and the other drive wheel 21 is connected to the generator. Through the clutch control of the different drive wheels 21 and the motor or the generator during the energy storage and discharge stages, on the premise that the two drive wheels 21 maintain a transmission connection, the motor and the generator can perform different functions. It should be noted that the two drive wheels 21 can be either centrally driven or separately driven. When separately driven, the two drive wheels 21 can be synchronously rotated by electrical or mechanical means, which will not be elaborated here.

[0108] Based on the double-wheel drive described above, the carrier cable 4 includes the upper support carrier cable 1a and the lower support carrier cable 1b with a high-low interval. The upper support carrier cable 1a and the lower support carrier cable 1b respectively surround the corresponding drive wheels 21, and are used to make the drive wheels 21 drive the carrier cable 4 to run through the frictional force of the surrounding contact, or make the carrier cable 4 drive the drive wheels 21 to run, so as to realize the traction operation during the energy storage and discharge stages.

[0109] The double-wheel drive mechanism 2 is installed through a drive installation mechanism. The drive installation mechanism includes relatively erected drive brackets 23 and a transmission shaft mounting seat 24. The motor generator is installed on the drive brackets 23, and at the same time, the vertical transmission shaft 22 is installed on the transmission shaft mounting seat 24.

[0110] Similarly, when setting up the motor and the generator respectively, the drive shaft mounting seat 24 can be converted into the form of an equipment mounting seat, and the motor and the generator are respectively mounted on the drive bracket 23 and the equipment mounting seat located below, so as to ensure the effective installation of different functional equipment.

[0111] In order to cooperate with the carrier mechanism 5 to move up and down between the drive mechanism 2 and the steering mechanism 3, and at the same time keep the carrier mechanism 5 capable of horizontally rotating and changing direction at the steering mechanism 3 part, it is also necessary to keep the upper and lower carrier cables 4 at different heights at the steering mechanism 3 part.

[0112] Preferably, the steering mechanism 3 also includes two horizontally installed steering wheels 31 arranged in parallel. The steering wheels 31 have the same structure as the drive wheels 21 and the wheel surfaces of the steering wheels 31 are parallel to the wheel surfaces of the drive wheels 21. Further, the vertical distance between the two steering wheels 31 is the same as the vertical distance between the two drive wheels 21.

[0113] Through this setting method, the upper support carrier cable 1a and the lower support carrier cable 1b at different heights can respectively be closed and wound between their corresponding drive wheels 21 and steering wheels 31 at different heights, that is, the upper support carrier cable 1a and the lower support carrier cable 1b are respectively closed and wound between the drive wheels 21 and the steering wheels 31 in corresponding groups.

[0114] In order to keep the carrier cable 4 in stable and reliable pressing fit on the drive wheels 21 and the steering wheels 31, wheel grooves 32 are respectively arranged on the wheel surfaces of the drive wheels 21 and the steering wheels 31, and the carrier cable 4 is pressed and wound in the wheel grooves 32, so that the wheel grooves 32 play a good limiting effect.

[0115] During operation, the carrier cable 4 specifically runs in a winding manner under the friction force when it is in a pressed state with the drive wheels 21 and the steering wheels 31. In order to enhance the friction force to ensure synchronous operation and prevent slipping, necessary anti-slip structures are arranged in the wheel grooves 32 to ensure the continuous and stable winding movement of the carrier cable 4.

[0116] At the same time, in order to ensure the tension of the carrier cable 4, a tensioning mechanism is arranged at the rear side of the steering wheel 31. As shown in the figure, it is a screw type, to keep the carrier cable 4 in a tensioned state and ensure its stable and reliable operation during running.

[0117] Based on the connection between the carrier cable 4 and the carrier mechanism 5 described above, the carrier mechanism 5 is connected to the carrier cable 4 through a rope connection mechanism located on the side of the balance plate box 511, and the rope connection mechanism is fixedly connected to the carrier cable 4.

[0118] The carrying mechanism 5 includes a connection base 518 for mounting a rope connection mechanism, which is located on the side of the balance plate box 511. To ensure a secure connection between the carrying mechanism 5 and the carrying rope 4 when the inclined rope segment 12 and the horizontal rope segment 11 are guided, the rope connection mechanism is mounted on the connection base 518 on the side of the balance plate box 511 via a slew bearing 81.

[0119] Combine Figure 4 Specifically, the rope connecting mechanism includes a fixing device fixed on the carrying rope 4, such as a claw structure shown in the accompanying drawings, and the fixing device includes a fixed claw with a jaw 82, and the carrying rope 4 is fixedly installed in the jaw 82.

[0120] It should be noted that the present application does not limit the specific form of the rope connection mechanism. In addition to the above-mentioned claw type, it can also be other forms such as connecting ropes, as long as the connection relationship between the transport mechanism 5 and the transport rope 4 is met. It will not be repeated here.

[0121] Through the stacked horizontal rotating gravity flow energy storage system in this application, a continuous steady-state gravity flow and energy flow can be constructed, and under the premise of improving the carrying capacity, high-efficiency operation of energy storage and power generation can be guaranteed, and high-power storage / discharge of electric energy can be achieved.

[0122] During the operation process, it specifically includes the energy storage stage and the discharge stage.

[0123] During the energy storage phase, the stacked horizontal rotary gravity flow energy storage system continuously transports energy storage blocks 6 from the bottom of the system's stacking yard upward, creating a continuous gravity flow as the blocks 6 are lifted. During the energy storage process, the electric generator 7 converts electrical energy into kinetic energy, which is smoothly transferred to the drive mechanism 2, driving it to rotate.

[0124] The driving mechanism 2 drives the carrying rope 4 to start a circular motion through the friction between the driving mechanism 2 and the carrying rope 4. At the same time, the carrying rope 4 cooperates with the steering mechanism 3 to cause the steering mechanism 3 to rotate in the same direction.

[0125] As the carrying rope 4 continues to move, the carrying mechanism 5 connected to the upper carrying rope 1a and the lower carrying rope 1b included therein is pulled and continuously lifted and moved. The carrying mechanism 5 carries the energy storage block 6 located at the bottom stacking yard, so that it is lifted and moved along with the carrying mechanism 5. When approaching the top stacking yard, the energy storage block 6 is disengaged from the carrying mechanism 5, and the energy storage block 6 is sent to the top stacking yard and quickly transported away by the transfer equipment for storage. The carrying mechanism 5 rotates horizontally between the two driving wheels 21 and then continuously descends and moves until it reaches the bottom stacking yard, ready to start a new round of energy storage block 6 transportation tasks.

[0126] During the discharge phase, the stacked horizontal rotary gravity flow energy storage system continuously transports the energy storage blocks 6 located at the top storage yard from top to bottom, creating a continuous energy flow through the falling energy storage blocks 6. During the discharge process, the energy storage blocks 6 located at the top storage yard are transported by the transfer equipment to the top horizontal cable section 11.

[0127] The energy storage block 6 is fixed to the carrier mechanism 5. Then, under the action of gravity, the energy storage block 6 moves downward with the carrier mechanism 5, releasing the energy contained in it. The carrier mechanism 5 drives the carrier cable 4 to start moving through its clamping connection with the carrier cable 4.

[0128] The carrier cable 4 transmits motion to the drive mechanism 2 and the reversing mechanism through friction, driving both to rotate synchronously. The rotation of the drive mechanism 2 is then transmitted to the electric generator 7. The electric generator 7 enters power generation mode, converting kinetic energy into electrical energy and feeding it into the power grid.

[0129] When approaching the bottom storage yard, the energy storage block 6 is detached from the carrying mechanism 5, and the energy storage block 6 is sent to the bottom storage yard and transported away by the transfer equipment for storage.

[0130] The transport mechanism 5 continues to move until it reaches the bottom transport yard, ready to start a new round of transport tasks of the energy storage blocks 6 .

[0131] The carriers 5 are equidistantly connected to the carrier cables 4, providing a balanced and continuous gravity flow. The energy storage blocks 6 can be aligned one-to-one or spaced apart. The speed at which the carriers 5 follow the carrier cables 4 is adjustable, thus enabling adjustable gravity flow. This allows for on-demand regulation of energy flow, enabling "slow charge, fast discharge" or "charge-on-demand" functionality.

[0132] At the same time, the stacked horizontal rotary gravity flow energy storage system can also be economically and reliably designed and manufactured in modular form, and can be arranged in parallel and / or stacked up and down according to the hillside terrain to achieve larger-scale energy storage.

[0133] The energy storage system in this application is described using a specific example. When generating electricity, the energy storage block 6 is made of reinforced concrete with a density of 2,500 kg / m 3 The shape is a cuboid with a length of 1.2 meters, a width of 1.2 meters, and a height of 1.0 meters, and weighs 3.6 tons.

[0134] Assuming the vertical height difference of the hillside is 500 meters, if a single energy storage block 6 is lifted from the bottom of the hill to the top, the energy that can be stored is E=mgh=3.6X10 3 kgX9.8 m / s 2 X500 m=17,640,000, J=4.9 kWh.

[0135] Referring to the operating speeds of equipment such as passenger ropeways, freight ropeways, and mine hoists, if the speed is 6 meters per second, it can operate 21.6 kilometers per hour. Assuming that the energy storage blocks 6 are arranged at an interval of 10 meters, 2160 energy storage blocks 6 can be transported to the mountaintop per hour, and 2160 X 4.9 kWh / block = 10584.0 kW·h ≈ 10.6 MWh of energy can be stored per hour.

[0136] To improve the power generation capacity, multiple sets of energy storage systems can be arranged side by side in multiple rows and / or stacked vertically and horizontally on the hillside terrain. Alternatively, the speed of the carrier rope 4 can be increased or the spacing between the energy storage blocks 6 can be reduced to expand the energy storage scale.

[0137] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0138] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A stacked horizontal rotary gravity flow energy storage system, characterized in that: include: Carrying rope mechanism, carrying mechanism, driving mechanism and steering mechanism; The carrying rope mechanism includes a plurality of carrying ropes enclosed and looped between the driving mechanism and the steering mechanism, wherein the plurality of carrying ropes are spaced apart in height and stacked up and down, and can run continuously under the drive of the driving mechanism; The carrying rope is horizontally rotated and reversed at the driving mechanism and the steering mechanism to form an upper carrying rope and a lower carrying rope arranged in parallel between the top stacking yard and the bottom stacking yard; The carrying ropes are connected by a plurality of carrying mechanisms that can run along the closed loops, and the carrying mechanisms are used to carry energy storage blocks as energy storage carriers; The driving mechanism is connected to an electric generator mechanism, which continuously lifts the energy storage blocks located at the bottom storage yard through the driving mechanism to form a continuous gravity flow, and continuously lowers the energy storage blocks located at the top storage yard to convert the gravitational potential energy into electrical energy of the electric generator mechanism to form a continuous energy flow; The carrying mechanism includes a connecting portion and a carrying portion, wherein the connecting portion includes a balancing plate box corresponding to each of the carrying ropes, and a rope connecting device is connected to the side of the balancing plate box, and the rope connecting device is fixedly connected to the carrying rope; a balancing rod is movably connected between the balancing plate boxes; The top end of the balancing rod extends upward from the topmost balancing plate box, and the bottom end extends downward from the bottommost balancing plate box, and the outer side of the balancing rod is located inside the balancing plate box and is sleeved with a compression spring; The balancing plate box is provided with a spring limit frame for accommodating the compression spring. The bottom end of the compression spring abuts against the bottom wall of the spring limit frame, and the top end abuts against the pressure plate. The pressure plate is fixed to the balancing rod by a locking nut located above the pressure plate. The balancing rod includes a threaded section, and the locking nut is threadedly connected to the threaded section. The balancing rod distributes the energy storage block load borne by the balancing rod evenly to the upper and lower rope connecting devices through the compression spring, and transmits it to the upper and lower carrying ropes to achieve load balance of the two carrying ropes.

2. The stacked horizontal rotary gravity flow energy storage system according to claim 1 is characterized in that: The connecting portion is used to be connected to the carrying rope, and the bearing portion is connected below the connecting portion to be used for disassembling and connecting the energy storage block.

3. The stacked horizontal rotary gravity flow energy storage system according to claim 2 is characterized in that: The connection point between the rope connection device and the carrying rope and the center of the energy storage block are located on the same vertical straight line.

4. The stacked horizontal rotary gravity flow energy storage system according to claim 3 is characterized in that: The balancing rod is connected with a stop block located on the outer side of the bottom of the balancing plate box.

5. The stacked horizontal rotary gravity flow energy storage system according to claim 3 is characterized in that: The load-bearing portion includes a load-bearing hook and a hanger. The load-bearing hook is connected to the bottom end of the equalizing rod. The hanger is hinged to the bottom end of the load-bearing hook. The energy storage block is detachably connected to the hanger.

6. The stacked horizontal rotary gravity flow energy storage system according to claim 1, characterized in that: The driving mechanism is arranged at the top stacking yard, and the steering mechanism is arranged at the bottom stacking yard; Alternatively, the driving mechanism is arranged at the bottom stacking yard, and the steering mechanism is arranged at the top stacking yard; Alternatively, both the top stacking yard and the bottom stacking yard are provided with the driving mechanism.

7. The stacked horizontal rotary gravity flow energy storage system according to claim 1, characterized in that: The upper carrying rope and the lower carrying rope are inclined upward in parallel, and respectively include horizontal rope segments located on both sides of the top and bottom, and inclined rope segments. A guide mechanism is provided between the horizontal rope segment and the inclined rope segment, and the guide mechanism includes a group of guide wheel groups arranged in an arc shape that allows the carrying rope to move from horizontal to inclined or from inclined to horizontal.

8. The stacked horizontal rotary gravity flow energy storage system according to claim 1, characterized in that: The driving mechanism includes a dual-wheel driving mechanism, which includes two driving wheels arranged in parallel and a vertical transmission shaft, and the two driving wheels are horizontally mounted on the vertical transmission shaft; The electric generator mechanism includes an electric generator, the electric generator includes an output shaft, and the output shaft is connected to one end of the vertical transmission shaft through a coupling; Alternatively, the electric generator mechanism includes a generator and an electric motor, the generator and the electric motor each include an output shaft, and the output shaft is connected to the vertical transmission shaft via a coupling; The carrying rope includes an upper carrying rope and a lower carrying rope spaced at different heights. The two carrying ropes are respectively wrapped around the corresponding driving wheels, and are used to drive the driving wheels to drive the carrying ropes to run through the friction force of the surrounding contact, or to drive the driving wheels to run through the carrying ropes.

9. The stacked horizontal rotary gravity flow energy storage system according to claim 8, characterized in that: The steering mechanism includes two parallel and horizontally mounted steering wheels, the steering wheels having the same structure as the driving wheels and the wheel surfaces of the steering wheels being parallel to the wheel surfaces of the driving wheels; Each of the carrying ropes is closed and looped between the driving wheels and the steering wheels that correspond to each other in a group. Wheel grooves are respectively provided on the wheel surfaces of the driving wheels and the steering wheels, and the carrying ropes are compressed and looped in the wheel grooves.

10. The stacked horizontal rotary gravity flow energy storage system according to claim 3, characterized in that: The rope connecting device comprises a fixing device fixed on the carrying rope, wherein the fixing device comprises a fixing claw with a jaw, and the carrying rope is fixedly installed in the jaw.

11. The stacked horizontal rotary gravity flow energy storage system according to claim 1, characterized in that: The carrying mechanism is equidistantly connected to the carrying rope; The energy storage blocks correspond to the carrying mechanisms one by one, or the energy storage blocks correspond to the carrying mechanisms at intervals. The traveling speed of the carrying mechanisms following the carrying ropes is adjustable, thereby achieving adjustable gravity flow.

12. The stacked horizontal rotary gravity flow energy storage system according to claim 1, characterized in that: The stacked horizontal rotary gravity flow energy storage system includes multiple sets, and the multiple sets of the stacked horizontal rotary gravity flow energy storage system are arranged in multiple rows in parallel and / or stacked up and down on the hillside.

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