Stacked horizontal rotation type gravity flow energy storage system

Abstract

The invention relates to a stacked horizontal rotation type gravity flow energy storage system. The stacked horizontal rotation type gravity flow energy storage system comprises a carrying cable mechanism, a carrying mechanism, a driving mechanism and a steering mechanism; the carrying cable mechanism comprises a plurality of carrying cables which surround in a closed mode, and the carrying cables are arranged at intervals in a high-low mode, are overlapped and spliced in an up-down mode and can be driven by the driving mechanism to continuously operate; the carrying cable horizontally rotates and reverses at the driving mechanism and the steering mechanism to form an upper supporting carrying cable and a lower supporting carrying cable which are arranged in parallel; the carrying cables are connected through a plurality of carrying mechanisms capable of running along the carrying cables in a closed loop mode, and the carrying mechanisms are used for carrying energy storage blocks serving as energy storage carriers. The driving mechanism is connected with an electric power generation mechanism, the energy storage blocks located at the bottom of the stacking and transporting field are continuously lifted through the driving mechanism to form continuous gravity flow, and gravitational potential energy is converted into electric energy of the electric power generation mechanism through continuous descending of the energy storage blocks located at the top of the stacking and transporting field to form continuous energy flow.

Description

Technical Field

[0001] This application relates to the technical field of gravity energy storage, and more specifically, 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 and photovoltaic power in energy utilization has also been gradually increasing. However, renewable energy dominated by wind power and photovoltaic 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 adjust 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 popularized in water-scarce and complex terrain areas. There is an urgent need for new energy storage technologies to break through this limitation. For electrochemical energy storage, such as lithium-ion batteries, there are problems such as dependence on lithium resource raw materials and safety risks. In this context, gravity energy storage is regarded as an important supplementary technology due to its advantages such as independence from water resources, flexible siting, and a long lifespan of up to 50 years. As a new type of physical energy storage technology, gravity energy storage realizes energy storage through the conversion of the potential energy of solid weights and has the characteristics of flexible siting 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, and prototype machines have been built and demonstration projects have been planned, verifying the feasibility of the technology. However, there are still the following technical problems: The problem of limited load-bearing capacity. Most existing slope-type systems use a single-cable structure as the main carrier device for energy storage blocks, but the mechanical strength of the structure limits its load-bearing capacity.

[0004] The problem of low payload. Most existing slope-type systems 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 lifted weight and limiting the power generation efficiency.

[0005] 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

[0006] 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-mentioned gravity energy storage system.

[0007] 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 drive mechanism, and a steering mechanism; The carrier cable mechanism includes multiple carrier cables that are closed and surrounded between the driving mechanism and the steering mechanism. The multiple carrier cables are spaced at different heights and stacked vertically, and can operate continuously driven by the driving mechanism; The carrier cable horizontally rotates and changes direction at the driving mechanism and the steering mechanism, forming an upper branch carrier cable and a lower branch carrier cable that are arranged in parallel between the top stacking yard and the bottom stacking yard; 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; The driving mechanism is connected with an electric power generation mechanism. The driving mechanism continuously lifts the energy storage blocks located in the bottom stacking yard to form a continuous gravity flow. Moreover, the gravitational potential energy is converted into electrical energy of the electric power generation mechanism through the continuous descent of the energy storage blocks located in the top stacking yard to form a continuous energy flow.

[0008] In an alternative 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 blocks.

[0009] In an alternative 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. The rope connecting device is fixedly connected with the carrier cable, and a balance rod is movably inserted between the balance plate boxes; 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 straight line.

[0010] In an alternative embodiment, the top end of the balance 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 inside the balance plate box on the outside of the balance rod; 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 balance rod by a locking nut located above it. The balance rod includes a threaded section, and the locking nut is threadedly connected to the threaded section; A stop block is connected to the balance rod outside the bottom of the balance plate box; The balance rod enables the load of the energy storage blocks borne by the balance rod to be evenly distributed to the upper and lower two rope connecting devices through the compression spring, and is transmitted to the upper and lower two carrier cables, so as to achieve the load balance of the two carrier cables.

[0011] In an alternative embodiment, the carrying part includes a carrying hook and a hanging bracket. The carrying hook is connected to the bottom end of the balance rod. The hanging bracket is hinged to the bottom end of the carrying hook. The energy storage block is detachably connected to the hanging bracket.

[0012] 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; Or, the driving mechanism is arranged in the bottom stacking yard, and the steering mechanism is arranged in the top stacking yard; Or, the driving mechanism is arranged in both the top stacking yard and the bottom stacking yard.

[0013] In an alternative embodiment, the upper supporting carrying cable and the lower supporting carrying cable are parallel and inclined upward, and each includes a horizontal cable section located on both the top and bottom sides, and an inclined cable section. A guiding mechanism is arranged between the horizontal cable section and the inclined cable section. The guiding mechanism includes a set of guiding wheel groups arranged in an arc shape for making the carrying cable change from horizontal to inclined or from inclined to horizontal.

[0014] 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; The electric power generation mechanism includes an electric generator. The electric generator includes an output shaft. The output shaft is connected to one end of the vertical transmission shaft through a coupling; Or, the electric power generation mechanism includes a generator and a motor. The generator and the motor each include an output shaft. The output shafts are respectively connected to the vertical transmission shaft through couplings; The carrying cable includes an upper supporting carrying cable and a lower supporting carrying cable spaced at different heights. The two carrying cables respectively surround the corresponding driving wheels, and are used to drive the carrying cable to run by the frictional force of the surrounding contact, or to drive the driving wheels to run by the carrying cable.

[0015] 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; Each carrying cable is enclosed and surrounded between the corresponding driving wheels and steering wheels in a group. Wheel grooves are respectively arranged on the wheel surfaces of the driving wheels and the steering wheels. The carrying cable is tightly surrounded in the wheel grooves.

[0016] In an alternative embodiment, the rope connection device includes a fixing device fixed to the carrier rope, and the fixing device includes a fixing gripper with jaws, and the carrier rope is fixedly installed in the jaws.

[0017] In an alternative embodiment, the carrier mechanism is equidistantly connected to the carrier rope; The energy storage blocks correspond to the carrier mechanisms one by one, or the energy storage blocks correspond to the carrier mechanisms at intervals. The traveling speed of the carrier mechanism can be adjusted following the carrier rope, so as to realize the adjustable gravity flow.

[0018] In an alternative embodiment, the stacked horizontal rotary gravity flow energy storage system includes multiple sets, and multiple sets of the stacked horizontal rotary gravity flow energy storage systems are arranged side by side in multiple rows and / or stacked up and down on a hillside terrain.

[0019] The stacked horizontal rotary gravity flow energy storage system in the present application can realize the distributed bearing of gravity energy storage blocks, avoid single-point overload, and improve the safety of system operation.

[0020] Through the bearing of multiple carrier ropes, the bearing capacity limit of a single-rope structure can be broken through. At the same time, the form of the carrier rope can increase the payload during the transportation process and ensure the power generation efficiency.

[0021] On the premise of carrying and transporting with multiple carrier ropes, a necessary load balancing structure is set at the same time to balance the loads between the carrier ropes, ensuring the safety and reliability of the system.

[0022] The mutual cooperation of the carrier rope mechanism, the driving mechanism and the steering mechanism can form the continuous and steady operation of multiple carrier mechanisms during the operation of the driving mechanism. Combined with the transportation of the energy storage blocks by the carrier mechanism, stable and continuous gravity flow and energy flow can be obtained during the energy storage stage and the power generation stage. On the premise of improving the transportation capacity, the high-efficiency operation of the energy storage and power generation states can be ensured, and high-power storage / discharge of electric energy can be realized.

[0023] Compared with the common single-rope transportation, the stacked horizontal rotary gravity flow energy storage system in the present application has a stronger bearing capacity, more balanced load and more stable operation attitude, making the formation process of continuous gravity flow and energy flow more stable and reliable.

[0024] The gravity flow energy storage system in the present application can form continuous and steady gravity flow and energy flow. By adjusting the rotation speed of the electro-generating mechanism and the hanging interval of the energy storage blocks, the power consumption or power generation in the real-time state can be arbitrarily adjusted, and then the functions of "slow charge and fast discharge" or "charge and discharge on demand" can be realized.

[0025] Combined with the arrangement of multiple sets of gravity flow energy storage systems in a side-by-side multi-pieced and / or up-and-down stacked manner according to the hillside terrain, a larger-scale energy storage can be realized.

[0026] 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 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, and it can carry energy storage blocks with a larger mass, which 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.

[0027] Multiple carrier cables are used to transport gravity energy storage blocks, and at the same time, they are used to drive the movement of the energy storage blocks and bear 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.

[0028] Through the equalizing rod, the load of multiple carrier cables can be evenly distributed, and at the same time, the self-adjustment of the load between multiple carrier cables can be realized under special instability conditions, ensuring the safety and reliability of the system.

[0029] Other features and advantages of this application will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0030] 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, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic diagram of the overall structure of the stacked horizontal rotary gravity flow energy storage system of this application; Figure 2 It is a schematic diagram of the structure of the carrier mechanism of this application; Figure 3 It is a schematic diagram of the structure of the equalizing rod and the balance plate box of this application; Figure 4 It is a schematic diagram of the structure of the cable connection mechanism of this application.

[0032] Icon: 1 - Carrier cable mechanism; 1a - Upper support carrier cable; 1b - Lower support carrier cable; 11 - Horizontal cable section; 12 - Inclined cable section; 2 - Driving mechanism; 21 - Driving wheel; 22 - Vertical transmission shaft; 23 - Driving bracket; 24 - Transmission shaft mounting seat; 3 - Steering mechanism; 31 - Steering wheel; 32 - Groove; 4 - Carrier cable; 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 - Stop block; 518 - Connection seat; 52 - Bearing part; 521 - Bearing hook; 522 - Hanging bracket; 6 - Energy storage block; 7 - Electric power generation mechanism; 8 - Rope connection device; 81 - Slewing bearing; 82 - Jaw; 9 - Guide mechanism; 91 - Guide wheel set; Detailed implementation mode 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 with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not 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.

[0033] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", 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 when in 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 thus cannot 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.

[0034] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected" 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 elements. 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.

[0035] 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 driving 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.

[0036] 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.

[0037] The carrying form of multiple carrying cables can avoid the risk of single-point stress concentration compared with single-cable carrying. At the same time, a load balancing structure is used to balance the loads between multiple carrying cables, ensuring the stability, safety, and reliability of continuous gravity flow and energy flow.

[0038] 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 carrying cable mechanism 1, a carrying mechanism 5, a driving 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.

[0039] The carrying cable mechanism 1 includes multiple carrying cables 4 that are enclosed and looped between the driving mechanism 2 and the steering mechanism 3. The multiple carrying cables 4 are spaced at different heights and stacked vertically, and can operate continuously driven by the driving mechanism 2. Through the multiple carrying cables 4 spaced at different heights and their state of continuous closed-loop operation between the driving mechanism 2 and the steering mechanism 3, a structural basis for multi-cable load bearing can be formed, and the energy storage blocks 6 can be continuously carried by the carrying mechanism 5 connected to the multiple carrying cables 4 at the same time.

[0040] The carrying cables 4 are horizontally rotated and redirected at the driving mechanism 2 and the steering mechanism 3 to form an upper branch carrying cable 1a and a lower branch carrying cable 1b arranged in parallel between the top stacking yard and the bottom stacking yard. Furthermore, continuous lifting and lowering of the energy storage blocks 6 on the synchronous and continuous upper branch carrying cable 1a and lower branch carrying cable 1b can be formed, thereby respectively forming continuous gravity flow and energy flow.

[0041] Specifically between the upper branch carrying cable 1a and the lower branch carrying cable 1b, the carrying cables 4 are connected by multiple carrying mechanisms 5 that can run along their closed loops. The carrying mechanism 5 is used to carry the energy storage blocks 6 as energy storage carriers, and then continuous gravity flow and energy flow are formed through the lifting and lowering of the energy storage blocks 6.

[0042] The driving mechanism 2 is connected to an electric power generation mechanism 7. The energy storage blocks 6 located in the bottom stacking yard are continuously lifted by the driving mechanism 2 to form continuous gravity flow, and, the gravitational potential energy of the energy storage blocks 6 located in the top stacking yard is converted into electrical energy of the electric power generation mechanism 7 through continuous descent to form continuous energy flow.

[0043] Through the stacked horizontal rotary gravity flow energy storage system of the present invention, a stable and continuous carrying state of the energy storage blocks 6 can be formed, and effective continuous gravity flow and energy flow can be formed during the energy storage stage and the discharge stage. At the same time, the bearing capacity is stronger, the load is more balanced, and the running posture is more stable, making the formation process of continuous gravity flow and energy flow more stable and reliable.

[0044] Based on the continuous conveyance of the energy storage block 6 by the conveyance mechanism 5, the conveyance mechanism 5 specifically includes a connection part 51 and a bearing part 52. The connection part 51 is used to connect with the conveyance cable 4, and the bearing part 52 is connected below the connection part 51 and is used for the detachable connection of the energy storage block 6 on the bearing part 52.

[0045] From the load forms simultaneously connected by the same conveyance mechanism 5 to multiple conveyance cables 4 in this application, in order to balance the loads on the multiple conveyance cables 4, the connection part 51 includes balance plate boxes 511 corresponding one by one to the conveyance cables 4. A rope connection device 8 is connected to the side of the balance plate box 511, and the rope connection device is fixedly connected to the conveyance cable 4 to ensure that the balance plate box 511 does not fall through the conveyance cable 4.

[0046] An equalizing rod 512 is movably inserted between the balance plate boxes 511 to evenly distribute the load of the conveyance mechanism 5 between the upper conveyance cable 1a and the lower conveyance cable 1b through the equalizing rod 512.

[0047] At the same time, in order to ensure the stability of the load, the connection point of the rope connection device 8 and the conveyance 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 connection device 8 and the conveyance cable 4.

[0048] Based on the above structure, the transfer of the load is specifically carried out through the bearing part 52, the equalizing rod 512, the balance plate box 511, the rope connection device 8, and the conveyance cable 4 in sequence. The load of the energy storage block 6 directly acts on the bearing part 52 and the equalizing rod 512 integrally connected thereto.

[0049] Furthermore, from the perspective of evenly distributing the load between the upper conveyance cable 1a and the lower conveyance cable 1b, the top end of the equalizing 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 equalizing rod 512.

[0050] Since the equalizing rod 512 is a vertical rod with a continuous length structure, the load acting on the equalizing rod 512 will force it to move downward. A compression spring 513 is sleeved inside the balance plate box 511 on the outside of the equalizing rod 512.

[0051] Meanwhile, the balance rod 512 will produce the same amount of compressive deformation on the compression springs 513 in the balance plate boxes 511 distributed vertically. Further, the load is transmitted to the balance plate boxes 511 through the compression springs 513. Based on the fixed connection between the balance plate boxes 511 and the rope connecting device 8, the load received by the balance plate boxes 511 can be transferred to the rope connecting device 8. Further still, the load received by the rope connecting device 8 is finally transmitted to the carrying rope 4 fixedly connected thereto.

[0052] Through the above-mentioned structural arrangement and the transfer 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 ropes 4, thereby avoiding single-point overload on the multiple carrying ropes 4. On the premise of distributed load bearing, the load of the energy storage block 6 can be evenly dispersed among the multiple carrying ropes 4, maximizing the safety of the system operation.

[0053] During the initial installation, the forces at both ends of the balance rod 512 should be the same, so the two compression springs 513 are set to have the same deformation amount. Since the compression springs 513 have a large load-bearing capacity and perform well in terms of stability and fatigue life, the compression springs 513 are used to balance the loads at both ends of the balance rod 512.

[0054] Since they are compression springs 513, both ends of the springs need to be fixed. Inside the balance plate boxes 511, there are spring limit frames 514 for accommodating the compression springs 513. The bottom end of the compression spring 513 is fixedly abutted against the bottom wall of the spring limit 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.

[0055] Specifically, the top end of the compression spring 513 abuts against the pressure plate 515, and 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.

[0056] The balance rod 512 is connected with stop blocks 517 at the positions of the two balance plate boxes 511 to ensure that the springs are always in a compressed state. By arranging the stop blocks 517 on the outer side of the bottom of the balance plate boxes 511, the upward movement of the balance rod 512 at the position of the stop blocks 517 can be restricted, maintaining the reliable compressed state of the compression springs 513.

[0057] Through the above-mentioned setting method of the compression springs 513, the balance rod 512 can cooperate with the balance plate boxes 511 and the connection between the rope connecting device 8 and the carrying rope 4 to evenly disperse the load.

[0058] The equalizing lever 512 evenly distributes the load of the energy storage blocks borne by the equalizing lever 512 to the upper and lower two rope connection devices 8 through the compression springs 513 and transfers it to the upper load-carrying rope 1a and the lower load-carrying rope 1b, so as to achieve the load balance of the upper load-carrying rope 1a and the lower load-carrying rope 1b.

[0059] Except for the process of loading the energy storage blocks 6, when the energy storage blocks 6 are unloaded, the equalizing lever 512 can produce the same displacement for the two compression springs 513, so as to enable the different balance plate boxes 511 to be evenly reset.

[0060] Except for the even load distribution during normal operation, when the distance between different load-carrying ropes 4 changes, which more corresponds to the change in the tension of the load-carrying ropes 4 or the influence of external forces such as wind, the equalizing lever 512 can achieve self-adjustment of the load.

[0061] During operation, when the elongation of the load-carrying ropes 4 changes, the two balance plate boxes 511 will automatically adjust the elongation of the compression springs 513 to keep the loads on the two load-carrying ropes 4 balanced. In a specific example, taking the upper load-carrying rope 1a and the lower load-carrying rope 1b with high and low intervals and stacked on top of each other in the attached drawing, when the elongation of the lower load-carrying rope 1b becomes longer, that is, when the lower load-carrying rope 1b becomes loose, it causes the lower balance plate box 511 to move downward. At this time, the movement of the lower balance plate box 511 drives the compression spring 513 inside it to rebound, resulting in a decrease in the force received by the lower end of the equalizing lever 512, making the force received by the upper end of the equalizing lever 512 greater than that of the lower end. Therefore, the compression spring 513 inside the upper balance plate box 511 will push the equalizing lever 512 downward, causing the compression spring 513 inside the upper balance plate box 511 to rebound. The downward movement of the equalizing lever 512 will further compress the compression spring 513 inside the lower balance plate box 511, making the force received by the upper end of the equalizing lever 512 less than that of the lower end, but the gap is smaller than before. The compression spring 513 inside the lower balance plate box 511 will push the equalizing lever 512 upward, causing the compression spring 513 inside the upper balance plate box 511 to be further compressed. This cycle repeats until the forces at both ends of the equalizing lever 512 are the same and balanced.

[0062] Similarly, when the elongation of the upper load-carrying cable 1a increases, i.e., when the upper load-carrying cable 1a becomes loose, it causes the upper balance plate box 511 to move downward. At this time, the movement of the upper balance plate box 511 drives the compression spring 513 inside it to rebound, resulting in a decrease in the force on the upper end of the balance lever 512, making the force on the upper end of the balance lever 512 less than that on the lower end. Therefore, the compression spring 513 inside the lower balance plate box 511 will push the balance lever 512 upward, causing the compression spring 513 inside the lower balance plate box 511 to rebound. The upward movement of the balance lever 512 will further compress the compression spring 513 inside the upper balance plate box 511, making the force on the upper end of the balance lever 512 greater than that on the lower end, but the gap is smaller than before. The compression spring 513 inside the upper balance plate box 511 will push the balance lever 512 downward, causing the compression spring 513 inside the lower balance plate box 511 to be further compressed. This cycle repeats until the forces on both ends of the balance lever 512 are the same and balanced.

[0063] Through the connecting part 51 including the balance lever 512, the balance plate box 511 and the compression spring 513 in this application, the load can be evenly distributed on the upper load-carrying cable 1a and the lower load-carrying cable 1b, and at the same time, the load can be self-adjusted under special conditions.

[0064] In the present invention, the energy storage block 6 is directly suspended and carried by the carrying part 52. The carrying part 52 specifically includes a carrying hook 521 and a hanging frame 522. The carrying hook 521 is connected to the bottom end of the balance lever 512, and can transfer the load of the energy storage block 6 to the balance lever 512 through the hanging frame 522. At the same time, the hanging frame 522 is hinged to the bottom end of the carrying hook 521, which can maintain the relative self-weight adjustment of the center of gravity of the energy storage block 6. The energy storage block 6 is detachably connected to the hanging frame 522. Compared with the traditional detachable installation, by detachably connecting the energy storage block 6 to the hanging frame 522, the carrying structure can be simplified, the reliability of the system installation can be ensured, and the maintenance cost can be reduced.

[0065] From the perspective of the continuous operation of the load-carrying cable 4 driven by 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 the high-lying terrain platform. Through this setting method, the driving mechanism 2 can directly output and transfer the traction load to the carrying mechanism 5 and the energy storage block 6, reduce the load of the energy storage system during the energy storage process, reduce the overall stress load of the load-carrying cable 4, and compared with the traditional form of setting the driving mechanism 2 at the bottom, it can reduce the ineffective load during the bottom traction and improve the conversion rate during the energy storage process.

[0066] 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.

[0067] Alternatively, drive mechanisms 2 are provided 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 conveying mechanism 5 and the energy storage blocks 6, and can be specifically set according to the actual situation.

[0068] From the perspective of the specific structure of the conveying cable 4, the upper conveying cable 1a and the lower conveying cable 1b are parallel and inclined upward, respectively including 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 conveying cable to change from horizontal to inclined or from inclined to horizontal. Through the guiding wheel groups 91, the conveying cable 4 can smoothly pass through the connection part between the horizontal cable segment 11 and the inclined cable segment 12.

[0069] 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.

[0070] The two horizontally installed drive wheels 21 arranged in parallel can be axially spaced relative to the vertical transmission shaft 22. The space between the two drive wheels 21 constitutes the spacing between the upper conveying cable 1a and the lower conveying cable 1b, and at the same time constitutes the horizontal rotation and steering space of the conveying mechanism 5 at the position of the drive wheels 21.

[0071] At the same time, the two horizontally installed drive wheels 21 arranged in parallel can be surrounded by two conveying cables 4 with different heights, and at the same time, the conveying mechanism 5 can pass through the gap between the two drive wheels 21. At least a part of the conveying cable 4 is wound around the drive wheel 21. Combining the friction between the conveying cable 4 and the drive wheel 21, the drive wheel 21 drives the conveying cable 4 to move stably and continuously during the rotation operation, ensuring the reliable stability of the continuous gravity flow and energy flow.

[0072] In one of the implementation forms, the electric power generation mechanism 7 includes an electric generator, and the electric generator has both driving and discharging functions.

[0073] Based on the cooperation angle between the driving wheels 21 and the upper support carrying cable 1a and the lower support carrying cable 1b, the driving wheels 21 include a first active driving wheel 21 and a second active driving wheel 21, which are connected by a vertical transmission shaft 22. The two driving wheels 21 rotate synchronously, and the vertical transmission shaft 22 conducts transmission.

[0074] By connecting the output shaft of the motor generator to one end of the vertical transmission shaft 22 through a coupling, during the energy storage stage, the driving 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 carrying mechanism 5 to form a continuous gravity flow.

[0075] At the same time, during the discharge stage, the driving 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 the electric power generating mechanism 7 can generate in the form of a discharge function to form a continuous energy flow.

[0076] In another specific implementation form, the electric power generating 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 independently installing the driving wheels 21 through couplings, and the above technical effects can also be achieved.

[0077] In this application, the specific form of the electric power generating mechanism 7 is not limited. When independently controlling the driving wheels 21, one of the driving wheels 21 is connected to the motor, and the other driving wheel 21 is connected to the generator. Through the clutch control of different driving wheels 21 and the motor or the generator during the energy storage and discharge stages, on the premise that the two driving wheels 21 maintain a transmission connection, the motor and the generator play different functions. It should be noted that the two driving wheels 21 can be either centrally driven or separately driven. When separately driven, the two driving wheels 21 can be synchronously rotated by electrical or mechanical means, which will not be elaborated here.

[0078] Based on the double-wheel drive described above, the carrying cable 4 includes the upper support carrying cable 1a and the lower support carrying cable 1b with a high-low interval. The upper support carrying cable 1a and the lower support carrying cable 1b respectively surround the corresponding driving wheels 21, and are used to drive the carrying cable 4 to run by the friction force of the surrounding contact, or to drive the driving wheels 21 by the carrying cable 4 to realize the traction operation during the energy storage and discharge stages.

[0079] The double-wheel drive mechanism 2 is installed through a driving installation mechanism. The driving installation mechanism includes relatively erected driving brackets 23 and a transmission shaft mounting seat 24. The motor generator is installed on the driving brackets 23, and at the same time, the vertical transmission shaft 22 is installed on the transmission shaft mounting seat 24.

[0080] 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 below, so as to ensure the effective installation of different functional equipment.

[0081] 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.

[0082] 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.

[0083] Through this setting method, the upper support carrier cable 1a and the lower support carrier cable 1b at different heights can be respectively enclosed and surrounded 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 enclosed and surrounded between the corresponding drive wheels 21 and steering wheels 31 in groups.

[0084] In order to keep the carrier cable 4 in stable and reliable pressing fit on the drive wheel 21 and the steering wheel 31, wheel grooves 32 are respectively arranged on the wheel surfaces of the drive wheel 21 and the steering wheel 31, and the carrier cable 4 is tightly surrounded in the wheel grooves 32, so that the wheel grooves 32 play a good limiting effect.

[0085] During operation, the carrier cable 4 specifically runs in a surrounding manner under the action of the friction force in the state of being pressed against the drive wheel 21 and the steering wheel 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 surrounding movement of the carrier cable 4.

[0086] 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 lead screw type, to keep the carrier cable 4 in a tensioned state and ensure its stable and reliable operation.

[0087] 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.

[0088] The carrier mechanism 5 includes a connecting seat 518 for installing the rope connecting mechanism, and the connecting seat 518 is arranged on the side of the balance plate box 511. At the same time, in order to consider the fixed connection relationship between the carrier mechanism 5 and the carrier rope 4 when guiding in the inclined cable section 12 and the horizontal cable section 11, the rope connecting mechanism is installed on the connecting seat 518 on the side of the balance plate box 511 through a slewing bearing 81.

[0089] Combined with Figure 4 , specifically, the rope connecting mechanism includes a fixing device fixed on the carrier rope 4, such as the claw structure shown in the attached drawing. The fixing device includes a fixed claw with a jaw 82, and the carrier rope 4 is fixedly installed in the jaw 82.

[0090] It should be noted that in this application, the specific form of the rope connecting mechanism is not limited. In addition to the above-mentioned claw type, it can also be other forms such as a connecting rope, as long as the connection relationship between the carrier mechanism 5 and the carrier rope 4 is satisfied, which will not be elaborated here.

[0091] Through the stacked horizontal rotary gravity flow energy storage system in this application, a continuous steady-state gravity flow and energy flow can be constructed. On the premise of improving the carrying capacity, the high-efficiency operation of the energy storage and power generation states can be ensured, and the large-power storage / discharge of electric energy can be realized.

[0092] During the operation process, it specifically includes an energy storage stage and a discharge stage.

[0093] In the energy storage stage, the stacked horizontal rotary gravity flow energy storage system continuously transports the energy storage blocks 6 at the bottom stacking yard of the energy storage system from bottom to top, and a continuous gravity flow is formed by the lifting of the energy storage blocks 6. During the energy storage and power generation process, the electric generator mechanism 7 converts electric energy into kinetic energy, and the kinetic energy is smoothly transmitted to the driving mechanism 2 to drive the driving mechanism 2 to rotate.

[0094] The driving mechanism 2 drives the carrier rope 4 to start orbiting through the friction force between its surface and the carrier rope 4. At the same time, combined with the cooperation between the carrier rope 4 and the steering mechanism 3, the steering mechanism 3 is prompted to rotate in the same direction.

[0095] With the continuous movement of the carrier rope 4, the carrier mechanisms 5 connected to the upper branch carrier rope 1a and the lower branch carrier rope 1b it includes are continuously lifted and moved. The carrier mechanism 5 transports the energy storage blocks 6 at the bottom stacking yard, so that they are lifted and moved with the carrier mechanism 5. When approaching the top stacking yard, the energy storage blocks 6 are separated from the carrier mechanism 5, and the energy storage blocks 6 are sent into the top stacking yard and quickly transported away by the transfer equipment for storage. And the carrier mechanism 5 horizontally rotates and reverses between the two driving wheels 21 and then continuously descends until it reaches the bottom stacking yard, preparing to start a new round of energy storage block 6 transportation tasks.

[0096] During the discharging stage, the energy storage blocks 6 located in the stacking yard at the top of the energy storage system are continuously transported from top to bottom by the stacked horizontal rotary gravity flow energy storage system, and a continuous energy flow is formed by the falling of the energy storage blocks 6. During discharging, the energy storage blocks 6 located in the top stacking yard are transported to the horizontal cable section 11 at the top by the transfer equipment.

[0097] The energy storage block 6 is fixed to the carrying mechanism 5. Subsequently, under the action of gravity, the energy storage block 6 moves downward together with the carrying mechanism 5, releasing the stored energy. The carrying mechanism 5 drives the carrying cable 4 to start moving through its clamping connection with the carrying cable 4.

[0098] The carrying cable 4 transfers the movement to the driving mechanism 2 and the commutation mechanism through the friction force between it and the driving mechanism 2 and the commutation mechanism, driving the two to rotate synchronously. The rotation of the driving mechanism 2 is then transmitted to the electric power generation mechanism 7. The electric power generation mechanism 7 enters the power generation mode, converts kinetic energy into electric energy, and inputs it into the power grid.

[0099] When approaching the bottom stacking yard, the energy storage block 6 disengages from the carrying mechanism 5. The energy storage block 6 is sent to the bottom stacking yard and transported away by the transfer equipment for storage.

[0100] The carrying mechanism 5 continues to move until it reaches the bottom stacking yard, preparing to start a new round of transportation tasks for the energy storage blocks 6.

[0101] The carrying mechanism 5 is connected to the carrying cable 4 at equal intervals, which can provide a balanced and continuous gravity flow. At the same time, the energy storage blocks 6 can correspond to the carrying mechanism 5 one by one or at intervals. The traveling speed of the carrying mechanism 5 following the carrying cable 4 is adjustable, so as to realize the adjustable gravity flow. Thus, the energy flow can be adjusted as needed, and then the functions of "slow charge and fast discharge" or "charge and discharge as needed" can be realized.

[0102] At the same time, the stacked horizontal rotary gravity flow energy storage system can also be designed and manufactured economically and reliably in a modular way, and arranged in parallel multiple stacks and / or stacked up and down according to the hillside terrain to achieve larger-scale energy storage.

[0103] Taking one specific example to illustrate the energy storage system in this application, when generating electricity, the energy storage block 6 is mainly made of reinforced concrete, with a density of 2,500 kg / m 3 . The outer shape is a cuboid with a length of 1.2 m × a width of 1.2 m × a height of 1.0 m, and weighs 3.6 tons.

[0104] Assuming that the vertical height difference of the hillside is 500 m, lifting a single energy storage block 6 from the bottom of the mountain to the top of the mountain can store energy E = mgh = 3.6X10 3 kgX9.8 m / s 2 X500 m = 17,640,000 J = 4.9 kWh.

[0105] Referring to the operating speeds of equipment such as passenger ropeways, freight ropeways, and mine hoists, if the speed is 6 m / s, it can run 21.6 km per hour. Assuming that the energy storage blocks 6 are arranged at intervals of 10 m, then 2160 energy storage blocks 6 can be transported to the mountaintop per hour, and 2160 × 4.9 kWh / block = 10584.0 kW·h ≈ 10.6 MWh of energy can be stored per hour.

[0106] 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 carrying rope 4 can be increased or the spacing between the energy storage blocks 6 can be reduced to expand the energy storage scale.

[0107] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0108] 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 in the protection scope of the present application.

Claims

1. A stacked horizontal rotating gravity flow energy storage system, characterized in that: include: Carrying rope mechanism, carrying mechanism, driving mechanism and steering mechanism; The carrying rope mechanism comprises a plurality of carrying ropes which are enclosed and surround the driving mechanism and the steering mechanism, 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 their 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.

2. The stacked horizontal rotating gravity flow energy storage system according to claim 1 is characterized in that: The transport mechanism includes a connecting portion and a bearing portion, wherein the connecting portion is used to be connected to the transport 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 rotating gravity flow energy storage system according to claim 2 is characterized in that: The connecting part includes a balance board box corresponding to the carrying rope one by one, a rope connecting device is connected to the side of the balance board box, the rope connecting device is fixedly connected to the carrying rope, and a balance rod is movably connected between the balance board boxes; 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 rotating gravity flow energy storage system according to claim 3 is characterized in that: 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 inside, 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 on 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 is connected with a stop block located on the outer side of the bottom of the balancing plate box; 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.

5. The stacked horizontal rotating gravity flow energy storage system according to claim 3 is characterized in that: The load-bearing part comprises a load-bearing hook and a hanger, wherein the load-bearing hook is connected to the bottom end of the balancing rod, the hanger is hinged to the bottom end of the load-bearing hook, and the energy storage block is detachably connected to the hanger.

6. The stacked horizontal rotating gravity flow energy storage system according to claim 1 is 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 rotating gravity flow energy storage system according to claim 1 is characterized in that: The upper transport rope and the lower transport rope are inclined upward in parallel, and respectively include horizontal rope segments located on both sides of the top and bottom, and an inclined rope segment. A guide mechanism is provided between the horizontal rope segment and the inclined rope segment, and the guide mechanism includes a group of guide wheels arranged in an arc shape for making the transport rope change from horizontal to inclined or from inclined to horizontal.

8. The stacked horizontal rotating gravity flow energy storage system according to claim 1 is characterized in that: The driving mechanism comprises a dual-wheel driving mechanism, the dual-wheel driving mechanism comprises two driving wheels arranged in parallel, and a vertical transmission shaft, the two driving wheels are horizontally mounted on the vertical transmission shaft; The electric generator mechanism includes an electric generator, and 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 corresponding driving wheels, so that the driving wheels can drive the carrying ropes to run through the friction force of the wrapping contact, or the carrying ropes can drive the driving wheels to run.

9. The stacked horizontal rotating gravity flow energy storage system according to claim 8, characterized in that: The steering mechanism comprises 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 transport ropes is closed and looped between the driving wheels and the steering wheels that are corresponding to each other in a group. Wheel grooves are respectively arranged on the wheel surfaces of the driving wheels and the steering wheels, and the transport ropes are compressed and looped in the wheel grooves.

10. The stacked horizontal rotating 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, and the fixing device comprises a fixing claw with a jaw, and the carrying rope is fixedly installed in the jaw.

11. The stacked horizontal rotating 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, and the traveling speed of the carrying mechanisms following the carrying ropes is adjustable, thereby achieving adjustable gravity flow.

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

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