A load-carrying cable type bulk material conveying gravity flow energy storage system

Abstract

This application relates to a gravity flow energy storage system for bulk material transport using a cable-type carrier, comprising a dual-circulation carrier mechanism, a dual-circulation traction mechanism, a dual-wheel drive mechanism, a transport mechanism, and a bulk material transport mechanism. The bulk material transport mechanism includes a closed-loop conveyor belt for transporting the energy storage bulk material as the energy storage carrier. Multiple transport mechanisms that can operate synchronously with the two traction cables are connected between them, and the transport mechanisms can operate in a closed loop along the dual-circulation carrier mechanism. The transport mechanisms are connected to the conveyor belt so that the transport mechanisms drive the conveyor belt to operate continuously under the traction of the traction cables and the support of the dual-circulation carrier mechanism. This invention can utilize bulk energy storage to provide a continuous gravity flow, thereby achieving a continuous energy flow and solving the problems of intermittency, difficult site selection, and high investment associated with existing gravity energy storage systems.

Description

Technical Field

[0001] This application relates to the field of gravity energy storage, and more specifically, to a gravity flow energy storage system for cable-driven bulk material conveying. Background Technology

[0002] In recent years, my country's electricity demand has maintained a steady growth trend, and the proportion of new power generation technologies such as wind and solar power in energy utilization has also been gradually increasing. However, renewable energy sources, mainly wind and solar power, are characterized by randomness, volatility, and intermittency, and cannot fully meet the society's electricity demand. Therefore, it is necessary to utilize energy storage systems to regulate the demand for electricity generation and consumption.

[0003] Energy storage systems, as a means of regulating electricity supply and demand, are a key support and an inevitable requirement for the development of new energy sources. Gravity energy storage, with its advantages of long storage time, no energy decay, long lifespan, high safety, and low maintenance costs, is more suitable for large-scale grid energy storage and medium-to-long-term energy storage scenarios. Especially in areas with abundant wind and solar resources but unstable power output, it can effectively regulate power load, achieve energy balance and transfer, and improve the capacity for renewable energy absorption.

[0004] Furthermore, some gravity energy storage technologies can be deployed in a distributed manner in conjunction with existing infrastructure such as abandoned mines, barren hillsides, and high-rise buildings, aligning with the development trend of land conservation and energy saving. However, because gravity energy storage systems rely on the lifting and lowering of heavy objects to achieve potential energy conversion, most suffer from intermittent charging / discharging issues.

[0005] Therefore, the mechanism of bulk material transport has been applied to the field of gravity energy storage, giving rise to continuous charging / discharging bulk material transport gravity energy storage systems. However, existing bulk material transport gravity energy storage systems transport bulk materials by belt traction. The belt and idlers generate indentation resistance, and the material on the belt experiences squeezing resistance as it passes over the idlers, resulting in excessive operating resistance and low transport efficiency. Simultaneously, the belt bears significant tensile stress in the direction of travel, making it prone to longitudinal tearing and belt breakage, which is difficult to engineer to meet the efficiency requirements of gravity energy storage. Utility Model Content

[0006] The purpose of this application is to provide a gravity flow energy storage system for cable-driven bulk material conveying, which can solve the existing technical problems of the aforementioned gravity energy storage systems.

[0007] To achieve the above objectives, this utility model provides a gravity flow energy storage system for cable-type bulk material conveying, including a dual-circulation bearing mechanism, a dual-circulation traction mechanism, a dual-wheel drive mechanism, a transport mechanism, and a bulk material conveying mechanism;

[0008] The dual-circulation bearing mechanism includes two pairs of parallel upward-inclined bearing cables and a meandering track located on the top and bottom sides. The bearing cables and the meandering track are connected end to end to form a closed-loop circulation structure.

[0009] The dual-circulation traction mechanism includes two parallel, upward-sloping, closed-loop traction cables, and the dual-wheel drive mechanism includes two parallel, vertically installed drive wheels. At least a portion of the traction cables are wrapped around the drive wheels and run continuously under the drive of the drive wheels.

[0010] The bulk material conveying mechanism includes a closed-loop conveyor belt for transporting energy storage bulk materials as energy storage carriers.

[0011] Multiple transport mechanisms that can operate synchronously with the two traction cables are connected between them, and the transport mechanisms can operate in a closed loop along the carrying cables and the meandering track;

[0012] The transport mechanism is connected to the conveyor belt so that the transport mechanism can drive the conveyor belt to run continuously under the traction of the traction cable and the support of the double-circulation bearing mechanism.

[0013] The drive wheel is connected to an electric power generation mechanism;

[0014] The electric power generation mechanism is used to drive the drive wheel to rotate actively, and to form a continuous gravity flow through the continuously lifted energy storage bulk material;

[0015] Furthermore, the continuously descending energy storage material drives the drive wheel to rotate, thereby converting gravitational potential energy into electrical energy of the electric power generation mechanism to form a continuous energy flow.

[0016] In an optional embodiment, each of the transport mechanisms includes a transport frame connected between the conveyor belt and the traction cable. The transport frame includes rope connecting frames located on both sides in the direction of travel. Rope fixing devices are provided at both ends of the rope connecting frames. The rope fixing devices are rotatably pivotally connected to both ends of the rope connecting frames via slewing bearings and are fixedly connected to the traction cable.

[0017] In an optional embodiment, the transport frame further includes multiple frame strips arranged side by side between the rope connecting frames, and the multiple frame strips are connected by an assembly mechanism located below them;

[0018] Multiple frame plates are arranged at intervals along the travel direction of the transport mechanism. The frame plates located on both sides of the travel direction are connected to traveling wheels, which can roll along the bearing mechanism.

[0019] The two ends of the frame strip are connected to wheel set fixing frames. The inner ring of the walking wheel is mounted on the wheel set fixing frame through the wheel axle, and the outer ring of the walking wheel rolls on the bearing mechanism.

[0020] In an optional embodiment, the carrying cable and the meandering track together form a closed loop structure, and the traction cable is disposed on the inner side of the carrying cable and the meandering track;

[0021] The traveling wheels and the rope fixing devices are respectively installed on the upper and lower sides of the transport frame. Each end of the frame bar is connected to a pressure plate. The edge of the conveyor belt is clamped between the pressure plate and the frame bar. The pressure plate is fastened to the frame bar by bolts.

[0022] In an optional embodiment, a gap is left between adjacent frame strips, and the assembly mechanism includes a guide rigid chain disposed below the frame strips;

[0023] The guide rigid chain is a unidirectional bending structure that can only bend away from the rack strip. It includes multiple chain plates that are hinged together with staggered inner and outer sides. The chain plates include outer chain plates and inner chain plates that are stacked together. Each outer chain plate is respectively arranged corresponding to the rack strip and is connected to the bottom of the rack strip by a fixing plate.

[0024] In an optional embodiment, the dual-wheel drive mechanism includes a horizontally arranged drive shaft, two drive wheels vertically connected to the drive shaft and arranged axially spaced relative to the drive shaft, or the two drive wheels are driven independently and arranged in a mirror-symmetrical manner.

[0025] The two traction cables are respectively wrapped around their corresponding drive wheels, and the drive wheels drive the traction cables through the frictional force of the wrapping contact.

[0026] The end of the drive shaft is connected to the electric generator mechanism, which includes an electric generator and an output shaft. The output shaft is connected to the drive shaft via a coupling.

[0027] Each of the two traction cables comprises a single closed loop traction cable, a section of which wraps around the drive wheel.

[0028] In an optional embodiment, the dual-wheel drive mechanism is located at the top of the energy storage system;

[0029] A detour wheel assembly is provided at the bottom of the energy storage system. The detour wheel assembly includes two parallel, vertically mounted steering wheels. The steering wheels have the same structure as the drive wheels, and the wheel surfaces of the steering wheels and the drive wheels are located on the same plane.

[0030] Each of the traction cables is enclosed and wrapped between the corresponding drive wheel and the steering wheel. The drive wheel and the steering wheel are respectively provided with wheel grooves on their wheel surfaces, and the traction cable is pressed and wrapped in the wheel grooves.

[0031] Alternatively, the dual-wheel drive mechanism is located at the bottom of the energy storage system, and the detour wheel assembly is located at the top of the energy storage system;

[0032] Alternatively, the dual-wheel drive mechanism may be installed at both the top and bottom of the energy storage system.

[0033] In an optional embodiment, guide sprockets are provided in pairs between the drive wheels and between the steering wheels, and the guide sprockets are coaxially connected to the drive wheels or the steering wheels and mesh with the assembly mechanism.

[0034] In an optional embodiment, the carrying cable includes an upper branch carrying cable and a lower branch carrying cable arranged in pairs, and the outer side wall of the traveling wheel is provided with a rope groove for limiting the carrying cable. The detour track is used for the traveling wheel to turn and connect between the upper branch carrying cable and the lower branch carrying cable.

[0035] The detour track includes an upper branch detour track and a lower branch detour track. The upper branch carrying cable and the lower branch carrying cable are connected end-to-end with the upper branch detour track and the lower branch detour track respectively to form a closed loop structure.

[0036] In an optional embodiment, a storage yard for storing the energy storage bulk material is also included. The storage yard is located at the top and bottom of the energy storage system, and the energy storage bulk material is transported back and forth between the storage yard and the bulk material conveying mechanism by a transfer device.

[0037] The load-bearing cable-type bulk material conveying gravity flow energy storage system includes multiple sets, which are arranged in parallel rows and / or stacked one on top of the other on hillsides or gullies.

[0038] The load-bearing cable-type bulk material conveying gravity flow energy storage system in this application can utilize bulk energy storage bodies to provide continuous gravity flow, thereby achieving continuous energy flow and solving the problems of intermittency, difficult site selection, and large investment in existing gravity energy storage.

[0039] By applying the mechanism of bulk material transport to gravity energy storage, continuous energy storage and discharge can be achieved. Using a traction cable as the traction element, compared to traditional belt traction, the bulk material conveyor only loads the bulk material without bearing tensile stress along the direction of travel. This reduces the performance requirements of the belt, allowing the use of more economical standard belts and significantly extending their service life. Simultaneously, the belt, free from traction stress, avoids longitudinal tearing and breakage, ensuring the continuous stability of the gravity flow.

[0040] Traditional belt conveyors use idlers to support the upper and lower branch belts, and the idlers rotate as the belts run. In this invention, a carrying mechanism supports the conveyor belt, and a traction cable provides synchronous traction for the carrying mechanism. This avoids the crushing resistance between the belt and the idlers, as well as the squeezing resistance of the material on the belt as it passes over the idlers, significantly reducing running resistance and improving conveying efficiency.

[0041] By replacing the idler rollers with a carrier mechanism and connecting the carrier mechanism and the conveyor belt as a whole, the carrier mechanism and the conveyor belt can run continuously under the traction of the traction cable. Combined with the fact that the carrier mechanism can run in a closed loop along the carrying cable and the meandering track, the running resistance can be reduced to the greatest extent. The rolling resistance of the traveling wheel during the rolling process is much smaller than that of the idler roller, which can reduce the ineffective power consumption during the traction process and ensure energy storage efficiency.

[0042] Through the cooperation of the bearing mechanism, traction mechanism and drive mechanism, the continuous and steady-state traction operation of the carrying mechanism and bulk material conveying mechanism can be formed during the operation of the drive mechanism. Combined with the carrying of the energy storage bulk material by the bulk material conveying mechanism, a stable and continuous gravity flow and energy flow can be obtained in the energy storage and discharge stages. Under the premise of improving the carrying capacity, the high-efficiency operation of energy storage and power generation can be guaranteed, and high-power energy storage / discharge can be realized.

[0043] By decoupling the load-bearing and traction relationship formed by the load-bearing mechanism and the traction cable, compared with common gravity flow energy storage systems, the system has a stronger load-bearing capacity and a more balanced load, making the formation process of continuous gravity flow and energy flow more stable and reliable.

[0044] The parallel drive wheels reduce space requirements and facilitate the formation of drive traction surfaces corresponding to the two traction cables, ensuring a stable and reliable continuous cycle of the traction cables.

[0045] By combining the load-bearing mechanism, traction mechanism, drive mechanism and transport mechanism, a four-in-one composite transmission system is constructed, which maximizes safety and stability compared to the traditional single belt traction.

[0046] This invention can form a continuous steady-state gravity flow and energy flow. By adjusting the speed of the conveyor belt following the carrying mechanism and adjusting the carrying capacity of the energy storage bulk material, the real-time power consumption or power generation can be arbitrarily adjusted, thereby realizing the functions of "slow charging and fast discharging" or "charging and discharging on demand".

[0047] By combining multiple load-bearing cable-driven bulk material conveying gravity flow energy storage systems, which can be arranged in parallel and / or stacked vertically according to the terrain of hillsides or gullies, a larger scale of energy storage can be achieved.

[0048] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a structural schematic diagram of the gravity flow energy storage system for cable-driven bulk material transport in this application;

[0051] Figure 2 for Figure 1 A partially enlarged structural diagram;

[0052] Figure 3 This is a schematic diagram of the structure of the transport mechanism in this application;

[0053] Figure 4 for Figure 3 A schematic diagram of the top structure;

[0054] Figure 5 This is a schematic diagram of the driving structure;

[0055] Figure 6 This is a schematic diagram of the rope fixing device.

[0056] icon:

[0057] 1-Bearing mechanism;

[0058] 100 - Load-bearing cable; 100a - Upper branch load-bearing cable; 100b - Lower branch load-bearing cable;

[0059] 110 - Detour track; 110a - Upper branch detour track; 110b - Lower branch detour track;

[0060] 120 - Anchoring mechanism; 120a - Anchoring column;

[0061] 2-Traction cable;

[0062] 21-Upward traction cable; 211-Steering wheel section; 212-Lower horizontal section; 213-Upward inclined section; 214-Upper horizontal section;

[0063] 22-Downward traction cable; 221-Drive wheel section; 222-Upper arc-shaped steering section; 223-Downward tilting section; 224-Lower arc-shaped steering section;

[0064] 23-Traction cable guiding device;

[0065] 3-Drive wheel; 31-Drive shaft; 32-Steering wheel; 33-Wheel groove; 34-Guide sprocket;

[0066] 4-Transportation mechanism; 4a-Transportation frame; 41-Rope connection frame; 42-Frame strip; 43-Assembly mechanism; 44-Walking wheel; 45-Wheel set fixing frame; 46-Pressure plate; 47-Fixing plate; 400a-Guide rigid chain; 400b-Chain plate;

[0067] 5-Electric generator mechanism;

[0068] 6-Drive support;

[0069] 7- Rope securing device; 71- Slewing bearing; 72- Jaws;

[0070] 8-Conveyor belt; 8a-Corrugated sidewall belt; 81-Base belt; 82-Corrugated sidewall; 83-Separator. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0072] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0073] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0074] The load-bearing cable-type bulk material conveying gravity flow energy storage system in this application is mainly used in the field of gravity energy storage. By optimizing the structure and energy storage method of the existing gravity energy storage system, it can form a continuous and stable gravity flow and energy flow. At the same time, it can avoid the drawbacks of traditional traction belts in the application of gravity energy storage and reduce the performance requirements of the conveyor belt.

[0075] See Figures 1-2 The load-bearing cable-type bulk material conveying gravity flow energy storage system of this utility model has a main structure including a dual-circulation load-bearing mechanism 1, a dual-circulation traction mechanism, a dual-wheel drive mechanism, a transport mechanism 4, and a bulk material conveying mechanism.

[0076] The bulk material conveying mechanism includes a closed, enclosed conveyor belt 8, which is connected to and traction-dependent with the dual-circulation traction mechanism via a carrying mechanism 4. The conveyor belt 8 is mainly used to transport and carry the energy storage bulk material as an energy storage carrier. The lifting and lowering of the energy storage bulk material constitutes a continuous gravity flow for energy storage and a continuous energy flow for discharge, respectively.

[0077] By lifting and transporting the bulk energy storage material via a continuously traction conveyor belt 8, a steady-state continuous gravity flow can be formed during the energy storage phase, and a steady-state continuous energy flow can be formed during the discharge phase through the release of the gravity flow.

[0078] The dual-circulation bearing mechanism 1 is mainly used to support the conveyor belt 8, providing an effective bearing effect. It can support the carrying mechanism 4, the gravity energy storage bulk material and the conveyor belt 8, and improve the safety margin of the system operation.

[0079] The dual-circulation support mechanism 1 includes two pairs of parallel upward-inclined support cables 100 and detour tracks 110 located on both sides of the top and bottom of the energy storage system. The support cables 100 and the detour tracks 110 are connected end to end to form a closed-loop circulation structure of the support mechanism 1.

[0080] The load-bearing cable-type bulk material conveying gravity flow energy storage system in this application is suitable for deployment on hillsides or gullies, allowing the load-bearing cable 100 to cross gullies, significantly reducing the cost of civil engineering and steel structures, while avoiding large-scale ground occupation and protecting vegetation to practice green mountains and clear waters.

[0081] From the perspective of continuous traction, the dual-circulation traction mechanism of this utility model includes two parallel, upward-sloping, closed-loop traction cables 2, and the dual-wheel drive mechanism includes two parallel drive wheels 3. At least a portion of the traction cables 2 are wrapped around the drive wheels 3 and run continuously under the drive of the drive wheels 3.

[0082] Two parallel, upward-sloping, closed-loop traction cables 2 can run continuously and dynamically under the drive of two parallel, vertically installed drive wheels 3, forming a running structure to provide traction effect. Combined with the transport mechanism 4 that can run along the carrying cable 100 and the meandering track 110, and the connection and traction relationship between the conveyor belt 8 and the traction cables 2 established through the transport mechanism 4, the conveyor belt 8 can form a continuous traction running state under the dual action of the carrying mechanism 1 and the traction mechanism.

[0083] The traction force is connected between the conveyor belt 8 and the traction cable 2 by the carrying mechanism 4, thereby reducing the direct traction force on the belt and reducing the performance requirements of the conveyor belt 8. At the same time, the conveyor belt 8 can run continuously and steadily under the traction of the traction mechanism and the support of the bearing mechanism 1, ensuring the stability and reliability of gravity flow and energy flow.

[0084] The enclosed conveyor belt 8 can operate continuously in a closed loop, maintaining a continuous transport state for the energy storage bulk material. At the same time, multiple transport mechanisms 4 are connected between two traction cables 2 and can operate synchronously with the traction cables 2 under the traction of the traction cables 2. Furthermore, by connecting multiple transport mechanisms 4 to the conveyor belt 8 respectively, the traction force of the multiple transport mechanisms 4 connected to the conveyor belt 8 can be dispersed, reducing the concentration of local traction stress.

[0085] From the perspective of load bearing, the transport mechanism 4 can run in a closed loop along the load bearing cable 100 and the detour track 110 of the double-circulation load bearing mechanism 1. The load bearing cable 100 and the detour track 110 can support the conveyor belt 8 and the energy storage bulk material it carries, ensuring the stability and efficiency of the conveyor belt 8 during continuous operation.

[0086] The transport mechanism 4 in this application is connected to the conveyor belt 8, which enables the transport mechanism 4 to drive the conveyor belt 8 to run continuously under the traction of the traction cable 2 and the support of the double-circulation bearing mechanism 1, thereby avoiding the direct traction force borne by the existing conventional traction belt.

[0087] The cooperation between the bearing mechanism 1 and the traction mechanism can form a separate setting for bearing and traction. When the conveyor belt 8 is transporting, it uses the bearing mechanism 1 to support the weight of the transport mechanism 4, the bulk material conveying mechanism and the energy storage bulk material, and the traction mechanism pulls the transport mechanism 4, the bulk material conveying mechanism and the energy storage bulk material to slide along the bearing mechanism 1.

[0088] By decoupling the load-bearing and traction functions as described above, the stress concentration problem of traditional single-cable load-bearing traction systems can be solved, while also avoiding the problem of direct tension on the conveyor belt 8. The mutual interference between load-bearing and traction can be reduced through the cooperation of independent structures, ensuring the stability and reliability of both load-bearing and traction effects.

[0089] Two parallel, vertically mounted drive wheels 3 allow the traction cable 2 to be wound around them. The traction cable 2 is wound around the drive wheels 3, and the friction between the traction cable 2 and the drive wheels 3 enables the drive wheels 3 to drive the traction cable 2 to move stably and continuously during rotation, ensuring the reliable and stable flow of continuous gravity and energy.

[0090] The vertically mounted drive wheel 3, compared to the traditional transverse wheel design, reduces the footprint, overcomes terrain slope limitations, simplifies terrain requirements, and facilitates installation on more sloping areas. It allows for diverse terrain deployment and is particularly suitable for complex geological environments such as mountains, hills, and ravines. Furthermore, it facilitates the formation of a drive traction surface that works in conjunction with the traction cable 2, ensuring continuous movement of the traction cable 2 on the defined surrounding surface.

[0091] The electric generator 5 connected to the drive wheel 3 can drive the drive wheel 3 to rotate actively, forming a continuous gravity flow through the continuously lifted energy storage bulk material.

[0092] At the same time, the continuously descending energy storage material can drive the drive wheel 3 to rotate passively, so that the energy storage material after being lifted can convert the gravitational energy in the form of potential energy into the electrical energy generated by the electric power generation mechanism 5 to form a continuous energy flow during the descent.

[0093] From the perspective of facilitating the conveyor belt transport of energy storage bulk materials, the conveyor belt 8 in this application includes a corrugated sidewall belt 8a. The corrugated sidewall belt 8a includes a closed and encircling base belt 81, and corrugated sidewalls 82 and transverse partitions 83 disposed on the material conveying surface of the base belt 81. The corrugated sidewalls 82 are continuously disposed on both sides of the base belt 81 in the length direction, and the transverse partitions 83 are disposed at intervals between the corrugated sidewalls 82.

[0094] The corrugated sidewalls 82 and the transverse partitions 83 can form a multi-compartment space for material conveying on the conveyor belt 8, which is conducive to forming a multi-compartment structure. During operation, each compartment can be filled with energy storage bulk material as needed, or filled with energy storage bulk material intermittently, so as to realize the scale adjustment of gravity flow and energy flow.

[0095] From the connection angle between the transport mechanism 4 and the conveyor belt 8, the corrugated sidewall 82 is vertically perpendicular to the surface of the base belt 81, and the root of the corrugated sidewall 82 is connected to the inner side of the edge of the base belt 81, which is used to form the clamping space of the transport mechanism 4 for the conveyor belt 8.

[0096] The corrugated sidewall belt 8a enables conveying from 0° to 90°, maximizing height difference within the shortest belt length. Corrugated sidewalls 82 and crossbars 83 prevent material slippage. Sidewall height, crossbar spacing, and base belt width 81 can be customized as needed.

[0097] The base belt 81 is laid on the transport frame 4a of the transport mechanism 4 and fixed to the transport frame 4a by a clamping device, so that the base belt 81 moves together with the transport frame 4a. The base belt 81, the corrugated sidewall 82 and the cross diaphragm 83 are made into an integral structure by a process.

[0098] Traditional belt conveyors often have misaligned idlers that twist the belt, leading to belt misalignment. In this application, the transport mechanism 4 is fixed to the conveyor belt 8, thus avoiding belt misalignment. Idler rollers are arranged along the entire conveyor line, requiring significant manpower, resources, and time for inspection and maintenance. This application allows for targeted maintenance of the transport frame 4a at specific locations.

[0099] In this utility model, each transport mechanism 4 includes a transport frame 4a connected between the conveyor belt 8 and the traction cable 2. The transport frame 4a includes rope connecting frames 41 located on both sides of the travel direction. The rope connecting frames 41 enable the transport frame 4a to establish a connection with the traction cable 2, so that the traction cable 2 drives the transport frame 4a and the conveyor belt 8 to run continuously.

[0100] In the connection structure between the transport frame 4a and the traction cable 2, rope fixing devices 7 are provided at both ends of the rope connecting frame 41. The rope fixing devices 7 are rotatably pivotally connected to both ends of the rope connecting frame 41 via slewing bearings 71, and are fixedly connected to the traction cable 2. With this arrangement, the traction cable 2 can drive the transport frame 4a to run synchronously, and the transport frame 4a can also flexibly bend and deform along with the conveyor belt 8 at the drive wheel 3 and steering wheel 32, thereby ensuring the continuous and stable operation of the transport frame 4a and the conveyor belt 8.

[0101] Combination Figure 6 The rope fixing device 7 includes a fixing connection part with jaws 72, which can clamp and fix the traction cable 2. At the same time, the slewing bearing 71 allows the transport frame 4a to form an adaptive steering during flexible deformation, maintaining a real-time connection with the traction cable 2.

[0102] Combination Figures 3-4The transport frame 4a in this utility model is a structure that combines rigidity and flexibility. During operation, it can maintain the rigid support state of the planar frame, while also being able to undergo flexible bending deformation at the top and bottom sides of the energy storage system. On the one hand, it can adapt to the circumferential direction of the conveyor belt 8, and on the other hand, it can follow the traction cable 2 to bend flexibly at the turning point.

[0103] Specifically, the transport frame 4a also includes multiple frame strips 42 arranged side by side between the rope connecting frame 41. The multiple frame strips 42 are connected by the assembly mechanism 43 located below them, thereby realizing the rigid-flexible deformation transformation of the multiple frame strips 42.

[0104] Multiple frame plates 42 are arranged at intervals along the travel direction of the transport frame 4a. From the perspective of establishing a bearing relationship with the bearing mechanism 1, the frame plates 42 located on both sides of the travel direction are connected to traveling wheels 44. The traveling wheels 44 can roll along the bearing cable 100 and the detour track 110, thereby realizing the continuous operation of the transport frame 4a along the bearing cable 100 and the detour track 110.

[0105] From the installation angle of the traveling wheel 44 on the transport frame 4a, the two ends of the frame plate 42 are connected to the wheel set fixing frame 45. The inner ring of the traveling wheel 44 is installed on the wheel set fixing frame 45 through the wheel axle, and the outer ring of the traveling wheel 44 rolls on the double circulation bearing mechanism 1.

[0106] The load-bearing cable 100 and the meandering track 110 are connected end to end to form a closed-loop structure. The traction cable 2 is located inside the closed-loop structure, that is, the traction cable 2 is located inside the enclosed space of the closed-loop structure, which can maintain spatial isolation of the load-bearing and traction effects. Of course, this application does not limit this; by placing the traction cable 2 outside the enclosed space of the closed-loop structure, the corresponding technical effect can also be achieved, which will not be elaborated here.

[0107] Based on the fact that the traction cable 2 is set inside the closed space of the closed loop structure, the traveling wheel 44 and the rope fixing device 7 are respectively set on the upper and lower sides of the transport frame 4a. Specifically, the upper and lower sides are defined by the support surface of the transport frame 4a, so that the traveling wheel 44 and the rope fixing device 7 can form a rolling and connecting relationship with the bearing mechanism 1 and the traction cable 2 respectively.

[0108] During the operation of the upward traction cable 21, the frame 4a can effectively support the conveyor belt 8 upward. However, during the operation of the downward traction cable 22, it is necessary to consider preventing the conveyor belt 8 from falling off the transport frame 4a.

[0109] Specifically, each end of the frame strip 42 is connected to a pressure plate 46. The edge of the base belt 81 of the conveyor belt 8 is clamped between the pressure plate 46 and the frame strip 42, and the pressure plate 46 is fastened to the frame strip 42 by bolts. This arrangement ensures an effective connection between the transport frame 4a and the conveyor belt 8. The clamping and fixing of the pressure plate 46 between the corrugated sidewall belt 8a and the edge of the base belt 81 ensures a reliable and stable connection between the transport frame 4a and the conveyor belt 8, whether the upward traction cable 21 or the downward traction cable 22 is in operation.

[0110] It should be noted that, in order to ensure the effectiveness of the clamping and fixing connection, sufficient clamping space should be left between the corrugated sidewall belt 8a and the edge of the base belt 81. This is emphasized here.

[0111] In the specific structure of the transport mechanism 4 in this application, there is a gap between the adjacent frame plates 42 of the transport frame 4a, and the assembly mechanism 43 includes a guide rigid chain 400a disposed below the frame plates 42.

[0112] The guide rigid chain 400a is a unidirectional bending structure that can only bend away from the frame bar 42. It includes multiple chain plates 400b that are hinged together with staggered inner and outer sides. The chain plate 400b includes outer chain plates 400b and inner chain plates 400b that are stacked together. Each of the outer chain plates 400b is respectively arranged corresponding to the frame bar 42 and is connected to the bottom of the frame bar 42 by a fixing plate 47.

[0113] More specifically, the guide rigid chain 400a can only bend in the direction away from the frame plate 42, and cannot bend in the direction towards the frame plate 42 due to the restraint formed by the chain plate 400b. When receiving bulk materials, the planar rigidity of the moving frame is enhanced due to the restraint in the guide rigid chain 400a. When the structure changes direction by the drive wheel 3 / steering wheel 32, the guide rigid chain 400a drives the transport frame 4a to bend in the direction away from the moving frame, forming a flexible shape and achieving a smooth transition.

[0114] The guide rigid chain 400a comprises two sets of symmetrically arranged chain plates 400b, each set containing inner and outer rows of chain plates 400b. The inner and outer rows of chain plates 400b abut against each other. Each chain plate 400b has two pin holes at the top, one pin hole in the center of the bottom surface, and two semi-circular pin holes at its edges. The inner and outer rows of chain plates 400b are arranged alternately, such that the pin hole in the center of the bottom surface of the outer row of chain plates 400b corresponds to the pin hole at the bottom edge of the bottom surface of the inner row of chain plates 400b, thus ensuring that the guide rigid chain 400a can only bend in the direction away from the transport frame 4a.

[0115] The dual-wheel drive mechanism of this utility model includes a horizontally arranged transmission shaft 31, and two drive wheels 3 are vertically connected to the transmission shaft 31 and are arranged axially spaced relative to the transmission shaft 31. The space between the two drive wheels 3 constitutes the traction movement space of the transport mechanism 4 and the turning and turning space at the drive wheel 3.

[0116] In another specific implementation, the two drive wheels 3 can also be driven independently, and the two drive wheels 3 are arranged in a mirror-symmetrical manner, which can also achieve the above-mentioned technical effect.

[0117] From the perspective of constructing the driving traction surface as described above, the two traction cables 2 are respectively wrapped around the corresponding driving wheels 3, so that the driving wheels 3 can drive the traction cables 2 to run through the friction between the traction cables 2 and the driving wheels 3 that are in contact with each other.

[0118] The end of the drive shaft 31 is connected to the electric power generation mechanism 5. The electric power generation mechanism 5 specifically includes an electric generator, which has both driving and discharging functions. During the energy storage stage, it can drive the drive wheel 3 to rotate actively through the driving function, and at the same time, it can lift the energy storage bulk material located at the bottom of the energy storage system through the traction cable 2, the transport frame 4a and the conveyor belt 8 to form a continuous gravity flow.

[0119] Furthermore, during the discharge phase, the energy storage bulk material located at the top of the energy storage system is lowered and transported via the transport frame 4a and the conveyor belt 8. The transport frame 4a drives the traction cable 2 to run, which further causes the drive wheel 3 to rotate passively, thereby causing the electric generator to rotate. The discharge function converts the gravity flow into an energy flow in the form of electrical energy.

[0120] See Figure 5 The drive wheel 3 includes two active drive wheels 3 connected by a horizontal transmission shaft 31, or two active drive wheels 3 driven separately. The electric generator includes an output shaft, which is connected to the horizontal transmission shaft 31 by a coupling.

[0121] This application does not limit the specific form of the electric generator mechanism 5. In addition to the electric generator connected to the aforementioned drive shaft 31, one of the drive wheels 3 can be connected to the electric motor, and the other drive wheel 3 can be connected to the generator. By controlling the clutch and engagement of the different drive wheels 3 with the electric motor or generator during the energy storage and discharge stages, the electric motor and generator can perform different functions on the premise that the two drive wheels 3 maintain the transmission connection.

[0122] It should be noted that the two independent drive wheels 3 can also be kept running synchronously through mechanical or electrical control, which will not be elaborated here.

[0123] The two traction cables 2 each include a single closed loop traction cable 2, and a section of the loop traction cable 2 passes around the drive wheel 3.

[0124] From the perspective of parallel arrangement of traction cables 2, the two traction cables 2 each include a single closed loop annular traction cable 2. The annular traction cable 2 passes through the drive wheel 3, and the different sections of the annular traction cable 2 and the bearing mechanism 1 are on the same plane, forming a closed loop plane of traction cable 2, and ensuring that the bearing surface formed by the bearing mechanism 1 and the driving traction surface are on the same plane.

[0125] Preferably, the annular traction cable 2 is arranged vertically on the same plane, and its encirclement around the drive wheel 3 can maintain a relatively stable drive traction surface that is parallel to the bearing closed-loop plane.

[0126] The dual-wheel drive mechanism is located at the top of the energy storage system, that is, it is installed on a high-level terrain platform. This configuration allows for direct output and transmission of traction load to the traction cable 2 and the transport frame 4a, reducing the load on the energy storage system during energy storage and lowering the overall stress load on the traction cable 2. Compared to the traditional configuration where the drive mechanism is located at the bottom, this reduces the ineffective load during bottom traction and improves the conversion rate during energy storage.

[0127] The dual-wheel drive mechanism is installed through a drive mounting mechanism, which includes a drive support 6 erected opposite each other and an energy storage device mounting base. The drive shaft 31 and the drive wheel 3 are installed between the drive support 6, and the electric generator is installed on the energy storage device mounting base (not shown in the figure).

[0128] In addition to the drive system located at the top, the energy storage system of this invention also needs to consider setting up a necessary steering mechanism in order to maintain the stability of the load-bearing and traction cycle.

[0129] A detour wheel assembly is located at the bottom of the energy storage system. The detour wheel assembly is mainly used to coordinate the turning of the bearing mechanism 1, the transport mechanism 4, the traction mechanism and the bulk material conveying mechanism at the bottom. Preferably, in order to maintain the stability and integrity of the running bearing surface and the driving traction surface, the detour wheel assembly also includes two parallel vertically installed steering wheels 32. The steering wheels 32 have the same structure as the driving wheels 3, and the wheel surfaces of the steering wheels 32 and the driving wheels 3 are set on the same plane. Preferably, the wheel surfaces of the steering wheels 32 and the driving wheels 3 are set on the same vertical plane.

[0130] It should be noted that, in addition to the most economical top-drive form, a bottom-drive form can also be used, that is, the dual-wheel drive mechanism is set at the bottom of the energy storage system and the detour wheel set is set at the top of the energy storage system; or the form of top and bottom drive is carried out simultaneously, that is, the dual-wheel drive mechanism is set at both the top and bottom of the energy storage system. All of these can meet the operational requirements, and the specific settings can be made according to the actual situation.

[0131] From the perspective of connection and installation, the two steering wheels 32 have the same connection and installation structure as the drive wheel 3. They are installed through the provided steering supports and coaxially connected through the necessary transmission shaft 31 to ensure that the two steering wheels 32 maintain a relatively synchronous rotation relationship.

[0132] Each traction cable 2 is enclosed and looped between the corresponding drive wheel 3 and steering wheel 32, forming the drive traction surface corresponding to each traction cable 2.

[0133] In order to ensure a stable and reliable fit between the traction cable 2 and the drive wheel 3 and the steering wheel 32, the drive wheel 3 and the steering wheel 32 are respectively provided with wheel grooves 33. Preferably, the wheel grooves 33 are provided at the same location on the drive wheel 3 and the steering wheel 32 and are corresponding vertically.

[0134] The traction cable 2 is pressed and wrapped in the wheel groove 33, which specifically serves as a limiting fit to keep the plane of the traction cable 2 parallel to the bearing surface.

[0135] During operation, the traction cable 2 moves around under the action of friction when it is pressed against the drive wheel 3 and the steering wheel 32. In order to enhance the friction, ensure synchronous operation and prevent slippage, necessary anti-slip structures are set in the wheel groove 33 to ensure the continuous and stable circling movement of the traction cable 2.

[0136] For the assembly mechanism 43 on the transport frame 4a, in order to form a reliable deformation of the transport frame 4a at the top and bottom turning parts, it is necessary to provide necessary support and guidance for the transport frame 4a. Therefore, guide sprockets 34 are provided in pairs between the drive wheels 3 and between the steering wheels 32. The guide sprockets 34 are coaxially connected with the drive wheels 3 or the steering wheels 32, which can keep the guide sprockets 34 and the drive wheels 3 or the steering wheels 32 rotating synchronously. Furthermore, the guide sprockets 34 are meshed with the assembly mechanism 43, which can not only enhance the driving capability of the system, but also provide effective synchronous support for the conveyor belt 8.

[0137] In this application, two closed, encircling traction cables 2, in different sections, constitute an upward traction cable 21 and a downward traction cable 22. Specifically, the upward traction cable 21 includes a steering wheel section 211, a lower horizontal section 212, an upper inclined section 213, and an upper horizontal section 214. A traction cable guiding device 23, composed of multiple guide wheel sets, is arranged at the junction of the upper inclined section 213, the upper horizontal section 214, and the lower horizontal section 212 to facilitate a smooth transition between sections.

[0138] The downward traction cable 22 can be directly composed of the drive wheel section 221 and the downward inclined section 223. The traction cable 2 is directly connected to the steering wheel section 211 after transitioning from the drive wheel section 221. However, due to the large diameter of the drive wheel 3, the distance between the upper inclined section 213 and the lower inclined section 223 of the conveyor belt 8 at the steering part of the drive wheel 3 is increased, resulting in a higher position for the track column or the branch on the conveyor belt 8. Therefore, it is necessary to consider setting up necessary structures to reduce the distance between the upper inclined section 213 and the lower inclined section 223.

[0139] Based on this, the downhill traction cable 22 in this utility model includes a drive wheel section 221, an upper arc-shaped redirection section 222, a lower inclined section 223, and a lower arc-shaped redirection section 224. The upper arc-shaped redirection section 222 is the section of the drive wheel section 221 that curves upward in an arc towards the upper inclined section 213 and the upper horizontal section 214 of the uphill traction cable 21 after the drive wheel section 221 has turned; the lower arc-shaped redirection section 224 is the section of the lower inclined section 223 that curves upward in an arc towards the upper inclined section 213 and the lower horizontal section 212 of the uphill traction cable 21 when it is about to reach the steering wheel section 211.

[0140] The upper arc-shaped reversing section 222 and the lower arc-shaped reversing section 224 are set up mainly to reduce the distance between the upper inclined section 213 and the lower inclined section 223, which is specifically formed by multiple traction cable guide devices 23 on both sides of the top and bottom of the lower inclined section 223.

[0141] On the one hand, it can raise the downward inclined section 223 of the downward traction cable 22, reduce the height of the branch position on the track column or conveyor belt 8, increase overall stability and reduce investment. On the other hand, it can increase the contact angle / contact area between the traction cable 2 and the drive wheel 3 / steering wheel 32, improve traction force, and increase the system's carrying capacity and charging / discharging power.

[0142] Combination Figures 1-2 The structure of the medium-load-bearing cable-type bulk material conveying gravity flow energy storage system includes two pairs of parallel upward-inclined load-bearing cables 100 in the dual-circulation load-bearing mechanism 1, which are used to allow the traveling wheels 44 of the transport frame 4a to roll, so that the load-bearing cables 100 can fully exert their load-bearing effect.

[0143] Meanwhile, the meandering tracks 110 located on both sides of the top and bottom of the energy storage system can ensure that the traveling wheels 44 can be effectively steered at the drive wheels 3 and steering wheels 32. The meandering tracks 110 include a U-shaped channel steel structure, which allows the traveling wheels 44 to roll in the inner cavity of the U-shaped channel steel of the meandering tracks 110, thereby achieving steering.

[0144] The support cable 100 specifically includes an upper branch support cable 100a and a lower branch support cable 100b arranged in pairs. The outer side wall of the traveling wheel 44 is provided with a rope groove for the support cable 100 to be limited and engaged. The detour track 110 is used for the traveling wheel 44 to turn and connect between the upper branch support cable 100a and the lower branch support cable 100b, ensuring that the traveling wheel 44 turns smoothly and steadily.

[0145] The detour track 110 includes an upper branch detour track 110a and a lower branch detour track 110b. The upper branch carrying cable 100a and the lower branch carrying cable 100b are connected end to end to the upper branch detour track 110a and the lower branch detour track 110b to form a closed loop structure.

[0146] See Figure 2 and combined Figure 1 This application also includes an anchoring mechanism 120 for fixing the load-bearing cable 100, which can effectively fix the load-bearing cable 100. The anchoring mechanism 120 specifically includes an anchoring column 120a. Specifically, the connection part between the load-bearing cable 100 and the detour track 110 extends outward from the vertical plane of the relative load-bearing surface, and after extending outward at an incline for a certain length, it is supported and fixed by the anchoring column 120a and finally anchored to the ground in the form of a cable-stayed bridge, thereby ensuring the load-bearing stability of the load-bearing cable 100.

[0147] Based on the different stages of energy storage and discharge, the load-bearing cable-driven gravity flow energy storage system also includes a stockpile yard for storing energy storage bulk materials. The stockpile yard is located at the top and bottom of the energy storage system, and the energy storage bulk materials are transported back and forth between the stockpile yard and the bulk material conveying mechanism by transfer equipment.

[0148] The load-bearing cable-type bulk material conveying gravity flow energy storage system of this utility model can construct a continuous steady-state gravity flow and energy flow, and ensure high-efficiency operation of energy storage and power generation under the premise of improving carrying capacity, so as to realize high-power storage / discharge of electrical energy.

[0149] This utility model also provides a gravity flow energy storage method for cable-driven bulk material conveying, which is carried out through the gravity flow energy storage system for cable-driven bulk material conveying described in the foregoing embodiments, specifically including an energy storage stage and a discharge stage.

[0150] During the energy storage phase, the bulk energy storage material located at the bottom of the storage system is continuously transported upwards from the bottom by a load-bearing cable-type bulk material transport gravity flow energy storage system, forming a continuous gravity flow through the lifting of the bulk energy storage material. During the energy storage process, the electric generator 5 converts electrical energy into kinetic energy, which is smoothly transferred to the drive wheel 3, driving it to rotate clockwise.

[0151] Drive wheel 3, through the friction between its surface and traction cable 2, drives traction cable 2 to begin rotating. Simultaneously, in conjunction with the cooperation of traction cable 2 and steering wheel 32, steering wheel 32 is caused to rotate clockwise.

[0152] As the traction cable 2 continues to move, the transport mechanism 4 clamped to it is pulled and continuously moved along the preset bearing mechanism 1. The transport mechanism 4 drives the conveyor belt 8 and the energy storage bulk material dumped into the conveyor belt 8's multi-compartment space by the transfer equipment to move and lift. When approaching the top storage yard, the energy storage bulk material is automatically tilted and unloaded, and quickly transported away by the transfer equipment for storage and sent to the top storage yard, while the transport mechanism 4 and the conveyor belt 8 enter a curved track. Subsequently, the transport mechanism 4 drives the conveyor belt 8 to continuously travel along the circular track, eventually returning to the horizontal track, ready to start a new round of energy storage bulk material transportation tasks.

[0153] During the discharge phase, the energy storage bulk material located in the top storage yard of the energy storage system is continuously transported from top to bottom by the load-bearing cable-type bulk material gravity flow energy storage system, forming a continuous energy flow through the descent of the energy storage bulk material. During the discharge process, the energy storage bulk material located in the top storage yard is transferred by the transfer equipment to the conveyor belt 8 conveyor multi-compartment space.

[0154] Under the influence of gravity, the energy-storing bulk material, along with the conveyor belt 8 and the carrying mechanism 4, slides down the bearing mechanism 1, releasing its contained energy. The carrying mechanism 4, through its connection with the conveyor belt 8 and the traction cable 2, drives the traction cable 2 to begin moving.

[0155] The traction cable 2 transmits motion to the drive wheel 3 and steering wheel 32 through friction with the wheel groove 33, causing them to rotate counterclockwise. The rotation of the drive wheel 3 is then transmitted to the electric generator mechanism 5. The electric generator mechanism 5 enters the power generation mode, converting kinetic energy into electrical energy and inputting it into the power grid.

[0156] As the material approaches the bottom storage yard, the energy storage bulk material automatically tilts and unloads, then is quickly transported away by transfer equipment for storage and sent to the bottom storage yard. Meanwhile, the transport mechanism 4 continues to drive the conveyor belt 8 along the circular track. Finally, the transport mechanism 4 drives the conveyor belt 8 back to the horizontal track, ready to begin a new round of energy storage bulk material transportation.

[0157] During operation, the conveyor belt 8 follows the travel speed of the transport mechanism 4 and the load of the energy-storing bulk material, which is adjustable, thereby achieving adjustable gravity flow. This allows for on-demand adjustment of energy flow, thus realizing the functions of "slow charging and fast discharging" or "on-demand charging and discharging".

[0158] Meanwhile, the load-bearing cable-driven bulk material transport gravity flow energy storage system can also be designed and manufactured in an economical and reliable modular manner, and can be arranged in parallel multiple units and / or stacked vertically according to the terrain of hillsides or gullies, so as to achieve a larger scale of energy storage.

[0159] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0160] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gravity flow energy storage system for cable-driven bulk material conveying, characterized in that, It includes a dual-circulation bearing mechanism, a dual-circulation traction mechanism, a dual-wheel drive mechanism, a transport mechanism, and a bulk material conveying mechanism; The dual-circulation bearing mechanism includes two pairs of parallel upward-inclined bearing cables and a meandering track located on the top and bottom sides. The bearing cables and the meandering track are connected end to end to form a closed-loop circulation structure. The dual-circulation traction mechanism includes two parallel, upward-sloping, closed-loop traction cables, and the dual-wheel drive mechanism includes two parallel, vertically installed drive wheels. At least a portion of the traction cables are wrapped around the drive wheels and run continuously under the drive of the drive wheels. The bulk material conveying mechanism includes a closed-loop conveyor belt for transporting energy storage bulk materials as energy storage carriers. Multiple transport mechanisms that can operate synchronously with the two traction cables are connected between them, and the transport mechanisms can operate in a closed loop along the carrying cables and the meandering track; The transport mechanism is connected to the conveyor belt so that the transport mechanism can drive the conveyor belt to run continuously under the traction of the traction cable and the support of the double-circulation bearing mechanism. The drive wheel is connected to an electric power generation mechanism; The electric power generation mechanism is used to drive the drive wheel to rotate actively, and to form a continuous gravity flow through the continuously lifted energy storage bulk material; Furthermore, the continuously descending energy storage material drives the drive wheel to rotate, thereby converting gravitational potential energy into electrical energy of the electric power generation mechanism to form a continuous energy flow.

2. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 1, characterized in that, Each of the transport mechanisms includes a transport frame connected between the conveyor belt and the traction cable. The transport frame includes rope connecting frames located on both sides in the direction of travel. Rope fixing devices are provided at both ends of the rope connecting frames. The rope fixing devices are rotatably pivotally connected to both ends of the rope connecting frames via slewing bearings and are fixedly connected to the traction cable.

3. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 2, characterized in that, The transport frame also includes multiple frame strips arranged side by side between the rope connecting frames, and the multiple frame strips are connected by an assembly mechanism located below them; Multiple frame plates are arranged at intervals along the travel direction of the transport mechanism. The frame plates located on both sides of the travel direction are connected to traveling wheels, which can roll along the bearing mechanism. The two ends of the frame strip are connected to wheel set fixing frames. The inner ring of the walking wheel is mounted on the wheel set fixing frame through the wheel axle, and the outer ring of the walking wheel rolls on the bearing mechanism.

4. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 3, characterized in that, The load-bearing cable and the meandering track together form a closed loop structure, and the traction cable is located on the inner side of the load-bearing cable and the meandering track; The traveling wheels and the rope fixing devices are respectively installed on the upper and lower sides of the transport frame. Each end of the frame bar is connected to a pressure plate. The edge of the conveyor belt is clamped between the pressure plate and the frame bar. The pressure plate is fastened to the frame bar by bolts.

5. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 3, characterized in that, A gap is left between adjacent frame strips, and the assembly mechanism includes a guide rigid chain disposed below the frame strips; The guide rigid chain is a unidirectional bending structure that can only bend away from the rack strip. It includes multiple chain plates that are hinged together with staggered inner and outer sides. The chain plates include outer chain plates and inner chain plates that are stacked together. Each outer chain plate is respectively arranged corresponding to the rack strip and is connected to the bottom of the rack strip by a fixing plate.

6. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 3, characterized in that, The dual-wheel drive mechanism includes a horizontally arranged drive shaft, two drive wheels vertically connected to the drive shaft and arranged axially spaced relative to the drive shaft, or the two drive wheels are driven independently and arranged in a mirror-symmetrical manner. The two traction cables are respectively wrapped around their corresponding drive wheels, and the drive wheels drive the traction cables through the frictional force of the wrapping contact. The end of the drive shaft is connected to the electric generator mechanism, which includes an electric generator and an output shaft. The output shaft is connected to the drive shaft via a coupling. Each of the two traction cables comprises a single closed loop traction cable, a section of which wraps around the drive wheel.

7. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 6, characterized in that, The dual-wheel drive mechanism is located at the top of the energy storage system; A detour wheel assembly is provided at the bottom of the energy storage system. The detour wheel assembly includes two parallel, vertically mounted steering wheels. The steering wheels have the same structure as the drive wheels, and the wheel surfaces of the steering wheels and the drive wheels are located on the same plane. Each of the traction cables is enclosed and wrapped between the corresponding drive wheel and the steering wheel. The drive wheel and the steering wheel are respectively provided with wheel grooves on their wheel surfaces, and the traction cable is pressed and wrapped in the wheel grooves. Alternatively, the dual-wheel drive mechanism is located at the bottom of the energy storage system, and the detour wheel assembly is located at the top of the energy storage system; Alternatively, the dual-wheel drive mechanism may be installed at both the top and bottom of the energy storage system.

8. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 7, characterized in that, Guide sprockets are provided in pairs between the drive wheels and between the steering wheels. The guide sprockets are coaxially connected to the drive wheels or the steering wheels and are engaged with the assembly mechanism.

9. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 7, characterized in that, The carrying cable includes an upper branch carrying cable and a lower branch carrying cable arranged in pairs. The outer side wall of the traveling wheel is provided with a rope groove for limiting the carrying cable. The detour track is used for the traveling wheel to turn and connect between the upper branch carrying cable and the lower branch carrying cable. The detour track includes an upper branch detour track and a lower branch detour track. The upper branch carrying cable and the lower branch carrying cable are connected end-to-end with the upper branch detour track and the lower branch detour track respectively to form a closed loop structure.

10. The gravity flow energy storage system for cable-driven bulk material conveying according to claim 1, characterized in that, It also includes a storage yard for storing the energy storage bulk materials, the storage yard being located at the top and bottom of the energy storage system, and the energy storage bulk materials being transported back and forth between the storage yard and the bulk material conveying mechanism by a transfer device; The load-bearing cable-type bulk material conveying gravity flow energy storage system includes multiple sets, which are arranged in parallel rows and / or stacked one on top of the other on hillsides or gullies.

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