Double-cable lifting gravity flow energy storage system

Abstract

The utility model relates to a double-cable lifting gravity flow energy storage system which comprises a carrying cable mechanism, a carrying mechanism, a driving mechanism and a steering mechanism. The carrying cable mechanism comprises an outer side carrying cable and an inner side carrying cable which are arranged on the two sides of the carrying mechanism. The outer side carrying cables and the inner side carrying cables are connected through a plurality of carrying mechanisms capable of operating 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 and can drive the energy storage blocks to vertically or obliquely ascend and descend on the gravity flow energy storage system. A carrying steering mechanism is arranged between the two inner side carrying cables, and the carrying mechanism can be deformed and redirected at the part of the carrying steering mechanism; 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 and vertically 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 and vertical 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] The present application relates to the technical field of gravity energy storage, and more particularly, to a double-cable lifting 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 regulate the demand for power generation and power consumption, and energy storage technology has become a key means to balance supply and demand and ensure the stability of the power grid.

[0003] Traditional pumped-storage energy storage is limited by geographical conditions and water resources and is difficult to be 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 resources as raw materials and safety risks. Against this background, gravity energy storage is regarded as an important supplementary technology due to its advantages such as not relying on water resources, flexible siting, and a long service life 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.

[0004] However, there are still the following technical problems:

[0005] (1) Problem of intermittent lifting of energy storage loads. Existing vertical lifting systems such as cranes, elevators, and mine hoists only lift a single energy storage block each time and cannot form a continuous gravity flow and energy flow.

[0006] (2) Problem of low payload. Existing vertical lifting systems mostly use chain structures as the carrier devices for energy storage blocks, but the self-weight of the chains is relatively large, reducing the effective payload of the lifted weight and limiting the power generation efficiency.

[0007] (3) 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. Utility Model Content

[0008] The purpose of the present application is to provide a double-cable lifting gravity flow energy storage system that can solve the existing technical problems of the above-mentioned gravity energy storage system.

[0009] To achieve the above object, the present utility model provides a double-cable lifting gravity flow energy storage system, including: a carrier cable mechanism, a carrier mechanism, a driving mechanism, and a steering mechanism;

[0010] The carrier cable mechanism includes outer carrier cables and inner carrier cables disposed on both sides of the carrier mechanism. The outer carrier cables and the inner carrier cables each include two strands, which are closed and wound around between the drive mechanism and the steering mechanism and can continuously operate driven by the drive mechanism.

[0011] The outer carrier cables and the inner carrier cables are connected by a plurality of the carrier mechanisms that can run along the closed loop of the carrier cables. The carrier mechanism is used to carry energy storage blocks as energy storage carriers and can drive the energy storage blocks to vertically or obliquely lift on the gravity flow energy storage system.

[0012] A carrier steering mechanism is disposed between the two inner carrier cables. The carrier mechanism includes a carrier rack, and the carrier rack can be deformed and redirected at the position of the carrier steering mechanism.

[0013] The drive mechanism is connected with an electric power generation mechanism. The energy storage blocks at the bottom stacking yard are continuously vertically lifted by the drive mechanism to form a continuous gravity flow, and, the gravitational potential energy of the energy storage blocks at the top stacking yard is converted into electric energy of the electric power generation mechanism through the continuous vertical descent to form a continuous energy flow.

[0014] In an optional embodiment, the carrier rack includes outer cable connection frames and inner cable connection frames located on the front and rear sides. Both ends of the outer cable connection frames are connected with outer cable connection devices, and the outer cable connection devices are respectively fixedly connected with the two outer carrier cables.

[0015] Both ends of the inner cable connection frames are connected with inner cable connection devices, and the inner cable connection devices are respectively fixedly connected with the two inner carrier cables.

[0016] The outer cable connection devices are pivotally connected to both ends of the outer cable connection frames through slewing bearings.

[0017] The inner cable connection devices are pivotally connected to both ends of the inner cable connection frames through slewing bearings.

[0018] In an optional embodiment, the carrier rack further includes a plurality of rack strips arranged side by side between the outer cable connection frames and the inner cable connection frames, and the plurality of rack strips are connected by connection ropes located below them.

[0019] The connection ropes include at least two strands, which are arranged at both ends of the rack strips. Clamping blocks are arranged between adjacent rack strips, and the clamping blocks are fixedly connected with the connection ropes.

[0020] In an optional embodiment, the rack strips are connected with the connection ropes through rope clamps. The rope clamps include rope clamping blocks and connection blocks, and arc-shaped grooves for accommodating the connection ropes are arranged on both the rope clamping blocks and the connection blocks.

[0021] The rope clamping block includes a pair of screws, which sequentially pass through the connecting block and the row frame strip board and are fixed by a locking nut on the top surface of the row frame strip board.

[0022] In an alternative embodiment, both the outer cable connecting device and the inner cable connecting device include a fixing device fixed on the carrier cable;

[0023] The fixing devices each include a fixing jaw with a clamping mouth, and the carrier cable is fixedly installed in the clamping mouth.

[0024] In an alternative embodiment, the driving mechanism is arranged at the top stacking yard, and the steering mechanism is arranged at the bottom stacking yard;

[0025] Or, the driving mechanism is arranged at the bottom stacking yard, and the steering mechanism is arranged at the top stacking yard;

[0026] Or, both the top stacking yard and the bottom stacking yard are provided with the driving mechanism.

[0027] In an alternative embodiment, the driving mechanism includes an outer cable driving wheel and an inner cable driving wheel, and the outer cable driving wheel and the inner cable driving wheel are vertically connected to the same horizontal transmission shaft;

[0028] The steering mechanism includes an outer cable steering wheel and an inner cable steering wheel, and the outer cable steering wheel and the inner cable steering wheel are vertically connected to the same horizontal transmission shaft;

[0029] The carrier steering mechanism includes carrier steering wheels connected in pairs to the horizontal transmission shaft, and the carrier row frame is deformed and switched between a rigid structure and a flexible structure through the carrier steering wheels and redirected for operation;

[0030] No inner cable steering wheel and carrier steering wheel are provided on the horizontal transmission shaft located at the front side of the top of the gravity flow energy storage system;

[0031] The driving mechanism and the steering mechanism are arranged at the four corner positions of the gravity flow energy storage system, the outer cable driving wheel and the outer cable steering wheel are arranged in the same vertical plane, and the inner cable driving wheel and the inner cable steering wheel are arranged in the same vertical plane;

[0032] The planes where the outer cable driving wheel and the outer cable steering wheel are located are parallel to the planes where the inner cable driving wheel and the inner cable steering wheel are located;

[0033] The outer carrier cable is wound between the corresponding outer cable driving wheel and the outer cable turning wheel, and is used to drive the outer carrier cable to run by the frictional force of circumferential contact, or to drive the outer cable driving wheel to run by the outer carrier cable;

[0034] It further includes an inner cable guiding mechanism, and the inner cable guiding mechanism includes inner cable guiding wheels arranged in pairs and located in the same vertical plane as the inner cable driving wheel and the inner cable turning wheel;

[0035] The inner carrier cable is wound between the corresponding inner cable driving wheel, the inner cable turning wheel and the inner cable guiding wheel, and is used to drive the inner carrier cable to run by the frictional force of circumferential contact, or to drive the inner cable driving wheel to run by the inner carrier cable.

[0036] In an alternative embodiment, the electric power generation mechanism includes an electric generator, the electric generator includes an output shaft, and one end of the output shaft is connected to one end of the horizontal transmission shaft through a coupling;

[0037] Or, the electric power generation mechanism includes a generator and a motor, the generator and the motor respectively include output shafts, and the output shafts are respectively connected to the horizontal transmission shaft through couplings.

[0038] In an alternative embodiment, the inner carrier cable passes around the inner cable guiding wheel, so that the inner carrier cable forms an annular L-shaped running track between the inner cable guiding wheel, the inner cable turning wheel and the inner cable driving wheel.

[0039] In an alternative embodiment, when the inner cable connecting device passes around the inner cable guiding wheel, the part of the inner cable connecting device facing away from the jaw passes around the inner cable guiding wheel, and is used to form a cable pressing wheel on the inner cable guiding wheel.

[0040] In an alternative embodiment, wheel grooves are provided on the outer cable driving wheel, the inner cable driving wheel, the outer cable turning wheel, the inner cable turning wheel and the inner cable guiding wheel, and the carrier cable is tightly wound in the wheel grooves.

[0041] In an alternative embodiment, the carrier mechanisms are equidistantly connected to the carrier cable;

[0042] 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 mechanisms can be adjusted following the carrier cable, so as to realize the adjustability of the gravity flow.

[0043] In an alternative embodiment, the double-cable hoisting gravity flow energy storage system includes multiple sets, and the multiple sets of the double-cable hoisting gravity flow energy storage systems are arranged side by side in multiple rows and / or stacked vertically on a vertical structure.

[0044] The double-cable hoisting gravity flow energy storage system in this application can achieve distributed bearing of gravity energy storage blocks, avoid single-point overload, and improve the safety of system operation.

[0045] The dual bearing of the outer carrier cable and the inner carrier cable can break through the bearing capacity limit of the single-cable structure. At the same time, the form of the carrier cable can increase the payload during the transportation process and ensure the power generation efficiency.

[0046] On the premise that the outer carrier cable and the inner carrier cable are used for bearing and transportation, necessary carrier mechanisms are set at the same time to balance the loads between the outer carrier cable and the inner carrier cable, ensuring the safety and reliability of the system. At the same time, by setting the carrier mechanism to a structure that can be rigid-flexible converted during steering, it can not only ensure the rigid support of the carrier mechanism during the bearing process of the energy storage block, but also ensure the flexible passage of the carrier mechanism during continuous operation and steering.

[0047] Combined with the carrier steering mechanism arranged between the inner carrier cables, the carrier mechanism can be guided and supported during the steering process, ensuring that the carrier mechanism is stably transmitted with both rigidity and flexibility under the drive of the continuously operating carrier cable.

[0048] The mutual cooperation of the carrier cable mechanism, the drive mechanism, and the steering mechanism can form the continuous and steady operation of multiple carrier mechanisms during the operation of the drive mechanism. Combined with the transportation of the energy storage block by the carrier mechanism, stable and continuous gravity flow and energy flow can be obtained during the energy storage stage and the discharge 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.

[0049] The double-cable hoisting gravity flow energy storage system in this application has a stronger bearing capacity, the transmission of the carrier mechanism is more coherent, and the operating posture is more stable, making the formation process of continuous gravity flow and energy flow more stable and reliable.

[0050] The gravity flow energy storage system in this application can form continuous and steady gravity flow and energy flow. By adjusting the rotation speed of the electro-mechanical generator 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.

[0051] Combined with the arrangement of multiple sets of double-cable hoisting gravity flow energy storage systems in a side-by-side multi-pin and / or up-and-down stacked manner according to the structure type of the vertical structure, larger-scale energy storage can be achieved.

[0052] In the double-cable lifting gravity flow energy storage system of the present utility model, a carrier cable is used to replace the chain for transporting gravity energy storage blocks and to replace the chain for transmitting the carrier mechanism. 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 of 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.

[0053] By using an outer carrier cable and an inner carrier cable to transport gravity energy storage blocks, it is possible to simultaneously drive the movement of the energy storage blocks and jointly bear the load of the energy storage blocks.

[0054] 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.

[0055] Through a carrier mechanism combining rigidity and flexibility, it is possible to achieve the transmission and balanced distribution of the loads of multiple carrier cables, ensuring the safety and reliability of the system.

[0056] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore 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.

[0058] Figure 1 It is a schematic diagram of the overall structure of the double-cable lifting gravity flow energy storage system of the present application;

[0059] Figure 2 It is a schematic diagram of the structure of the carrier mechanism of the present application;

[0060] Figure 3 It is a schematic diagram of the cooperation structure between the carrier mechanism and the energy storage block of the present application;

[0061] Figure 4 It is a schematic diagram of the connection structure between the carrier mechanism and the carrier cable of the present application;

[0062] Figure 5 It is a schematic diagram of the structure of the cable clamp of the present application;

[0063] Figure 6 It is a schematic diagram of the structure of the outer cable connection device of the present application;

[0064] Figure 7 This is a schematic structural diagram of the internal cable connection device in this application.

[0065] Icon:

[0066] 1 - Carrier cable mechanism; 1a - Outer carrier cable; 1b - Inner carrier cable; 11 - Outer cable connection device; 12 - Inner cable connection device; 13 - Slewing bearing; 14 - Jaw

[0067] 2 - Driving mechanism; 21 - Outer cable driving wheel; 22 - Inner cable driving wheel; 23 - Horizontal transmission shaft

[0068] 3 - Steering mechanism; 31 - Outer cable steering wheel; 32 - Inner cable steering wheel

[0069] 4 - Carrier cable

[0070] 5 - Carrier mechanism; 50 - Carrier rack; 51 - Outer cable connection bracket; 52 - Inner cable connection bracket; 53 - Rack strip; 54 - Connecting rope; 55 - Clamping block; 56 - Cable gripper; 56a - Cable clamping block; 56b - Connecting block

[0071] 6 - Energy storage block

[0072] 7 - Electric power generation mechanism

[0073] 8 - Carrier steering wheel

[0074] 9 - Inner cable guide wheel Detailed implementation manners

[0075] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of the embodiments. Usually, the components of the embodiments of this application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0076] In this application, the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to this application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0077] In this application, unless otherwise clearly defined and limited, the terms "arrangement" and "connection" shall 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 can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0078] The double-cable lifting gravity-flow energy storage system in this application is mainly used in the field of gravity energy storage. Through the mutual cooperation of the carrier cable mechanism 1, the carrier mechanism 5, the driving mechanism 2, and the steering mechanism 3, the continuous operation of the energy storage carrier is realized, and then the continuous gravity flow and energy flow are realized.

[0079] 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.

[0080] The double-cable lifting carrier form can avoid the risk of single-point stress concentration compared with the single-cable carrier. At the same time, through the mutual cooperation of the rigid-flexible combined carrier mechanism and the carrier steering mechanism and the carrier mechanism, the coherent operation of the carrier mechanism on the closed-loop running carrier cable is realized, ensuring the stability, safety, and reliability of the continuous gravity flow and energy flow.

[0081] See Figure 1 and in combination with Figures 2 - 7 In the double-cable lifting gravity-flow energy storage system of the present utility model, the main structure includes a carrier cable mechanism 1, a carrier 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.

[0082] The carrier cable mechanism 1 includes an outer carrier cable 1a and an inner carrier cable 1b arranged on the left and right sides of the carrier mechanism 5. The inner carrier cable 1b includes two sets arranged on the left and right sides of the carrier mechanism 5, and the outer carrier cable 1a includes two sets arranged on the left and right sides of the inner carrier cable 1b.

[0083] The outer carrier cable 1a and the inner carrier cable 1b are simultaneously connected to the carrier mechanism 5, which can form the structural basis of the double-cable load-bearing. Combining that the outer carrier cable 1a and the inner carrier cable 1b are respectively closed and surrounded between the driving mechanism 2 and the steering mechanism 3, the outer carrier cable 1a and the inner carrier cable 1b can perform synchronous continuous operation driven by the driving mechanism 2. Furthermore, the carrier mechanism 5 connected between the outer carrier cable 1a and the inner carrier cable 1b can perform continuous closed-loop operation along the carrier cable 4, and continuously carry the energy storage block 6.

[0084] The carrier cable 4 drives the carrier mechanism 5 to vertically turn and change direction at the driving mechanism 2 and the steering mechanism 3, enabling the energy storage block 6 to continuously lift and lower on the outer carrier cable 1a and the inner carrier cable 1b that are running synchronously and continuously. The carrier mechanism 5 is used to carry the energy storage block 6 as an energy storage carrier and can drive the energy storage block 6 to vertically or obliquely lift and lower on the gravity flow energy storage system, thereby respectively forming continuous gravity flow and energy flow.

[0085] In order to ensure that the carrier mechanism 5 generates flexible deformation and turning during continuous operation, a carrier steering mechanism is provided between the two inner carrier cables 1b. The carrier mechanism 5 includes a carrier rack 50, and the carrier rack 50 can deform and change direction at the carrier steering mechanism. Specifically, through the setting of the carrier steering mechanism, the carrier mechanism 5 can support the energy storage block 6 during the loading process in the bottom stacking yard and guide it during the deformation and turning process of unloading the energy storage block 6, which is beneficial to ensuring the continuous operation of the carrier mechanism 5 on the double-cable bearing structure.

[0086] The driving mechanism 2 is connected to an electric power generation mechanism 7. Through the driving mechanism 2, the energy storage block 6 located in the bottom stacking yard is continuously lifted to form continuous gravity flow, and, through the continuous descent of the energy storage block 6 located in the top stacking yard, the gravitational potential energy is converted into electrical energy of the electric power generation mechanism 7 to form continuous energy flow.

[0087] Through the double-cable lifting gravity flow energy storage system in the present utility model, a stable and continuous carrying state of the energy storage block 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 transmission of the carrier mechanism 5 is more coherent, and the running attitude is more stable, making the formation process of continuous gravity flow and energy flow more stable and reliable.

[0088] Based on the fact that the carrier mechanism 5 can be simultaneously connected to the outer carrier cable 1a and the inner carrier cable 1b, the carrier rack 50 includes outer cable connection frames 51 and inner cable connection frames 52 located on the front and rear sides. Both ends of the outer cable connection frame 51 are connected with outer cable connection devices 11, and the outer cable connection devices 11 are respectively fixedly connected to the two outer carrier cables 1a;

[0089] Both ends of the inner cable connection frame 52 are connected with inner cable connection devices 12, and the inner cable connection devices 12 are respectively fixedly connected to the two inner carrier cables 1b.

[0090] Through the above structure of the carrier rack 50 and its connection relationship with the double cables, on the basis of the synchronous and continuous operation of the outer carrier cable 1a and the inner carrier cable 1b, the carrier mechanism 5 can maintain stable continuous operation on the closed-loop running outer carrier cable 1a and the closed-loop running inner carrier cable 1b.

[0091] On the basis that the outer carrier cable 1a and the inner carrier cable 1b run in a closed loop between the drive mechanism 2 and the steering mechanism 3, in order to consider the commutation of the carrier cable 4 at the drive mechanism 2 and the steering mechanism 3, the outer cable connecting device 11 is pivotally connected to both ends of the outer cable connecting frame 51 through a slewing bearing 13. At the same time, the inner cable connecting device 12 is pivotally connected to both ends of the inner cable connecting frame 52 through a slewing bearing 13, and can be turned over and commuted based on the deformation of the carrier rack 50 at the drive mechanism 2 and the steering mechanism 3, so that the outer cable connecting device 11 and the inner cable connecting device 12 rotate relative to the outer cable connecting frame 51 and the inner cable connecting frame 52 during the commutation process, thereby ensuring that the outer cable connecting device 11 and the inner cable connecting device 12 can change directions according to the commutation of the carrier cable 4, enabling the entire carrier mechanism 5 to perform deformation switching between the horizontal direction and the vertical direction and maintaining a stable and smooth continuous operation state.

[0092] From the perspective of the specific composition of the carrier mechanism 5 and considering the rigid-flexible conversion effect of the carrier mechanism 5, the carrier rack 50 further includes a plurality of rack strips 53 arranged side by side between the outer cable connecting frame 51 and the inner cable connecting frame 52. The plurality of rack strips 53 are connected by a connecting rope 54 located below them. Through the connection of the connecting rope 54, the flexible structural characteristics of the carrier rack 50 are effectively given, enabling it to be continuously conveyed by flexible deformation flipping at the commutation position of the carrier cable 4. At the same time, the connecting rope 54 can group and match the plurality of rack strips 53 into a whole, reducing the risk of their loosening.

[0093] Further, the connecting rope 54 on each carrier rack 50 includes at least two strands. The connecting rope 54 is arranged at both ends in the length direction of the rack strip 53. In order to endow the rigid structural characteristics of the carrier rack 50, clamping blocks 55 are arranged between adjacent rack strips 53, and the clamping blocks 55 are fixedly connected to the connecting rope 54.

[0094] Specifically, the rigid angle of the operating rack is reflected in the process of bearing the energy storage block 6 while maintaining a horizontal state. When the plurality of rack strips 53 are in a horizontal state, combined with the covering pressure of the energy storage block 6 on the rack strips 53 and transmitting the load through the rack strips 53 to the clamping blocks 55, a rigid connection body can be formed between the rack strips 53 and the clamping blocks 55, thereby ensuring the effective bearing of the energy storage block 6.

[0095] The rack strip 53 is connected to the connecting rope 54 through a rope clip 56. The rope clip 56 includes a rope clamping block 56a and a connecting block 56b. The connecting rope 54 is clamped and fixed between the rope clamping block 56a and the connecting block 56b. Arc-shaped grooves for accommodating the connecting rope 54 are provided on both the rope clamping block 56a and the connecting block 56b. The connecting rope 54 is specifically clamped and fixed in the annular space formed by the splicing of the arc-shaped grooves, and thus the contact area between the connecting rope 54 and the annular space can be ensured through the clamping locking force.

[0096] The rope clamping block 56a includes a pair of screws which sequentially pass through the connecting block 56b and the row support strip 53 and are locked and fixed by a locking nut on the top surface of the row support strip 53. Thus, the formation of the clamping locking force is achieved by the locking of the locking nut on the screw.

[0097] From the perspective of the connection between the carrier cable 4 and the carrier row support 50, both the outer cable connection device 11 and the inner cable connection device 12 include fixing devices fixed on the carrier cable 4. The fixing devices both include fixing claws with jaws 14, and the carrier cable 4 is fixedly installed in the jaws 14.

[0098] From the perspective of the continuous operation of the carrier cable 4 driven by the driving mechanism 2, the driving mechanism 2 and the necessary steering mechanisms 3 therein are arranged in the top stacking yard, and the other steering mechanisms 3 are arranged in the bottom stacking yard. That is, the driving mechanism 2 is installed on a high-lying terrain platform. Through this setting method, the driving mechanism 2 can directly output and transfer the traction load to the carrier mechanism 5 and the energy storage block 6, reducing the load of the energy storage system during the energy storage process, reducing the overall stress load of the carrier cable 4. Compared with the traditional form of setting the driving mechanism 2 at the bottom, it can reduce the ineffective load during bottom traction and improve the conversion rate during the energy storage process.

[0099] It should be noted that in addition to adopting the form of top driving with the highest economy, the form of bottom driving can also be adopted, where the driving mechanism 2 and the necessary steering mechanisms 3 therein are arranged in the bottom stacking yard, and the steering mechanisms 3 are arranged in the top stacking yard, so that the driving mechanism 2 is installed on a low-lying terrain platform to achieve bottom driving.

[0100] Or driving mechanisms 2 are arranged in both the top stacking yard and the bottom stacking yard to form a form of simultaneous top driving and bottom driving, which can meet the lifting requirements of the carrier mechanism 5 and the energy storage block 6, and specific settings can be made according to the actual situation.

[0101] In order to constitute the continuous operation state of the carrier mechanism 5 in the gravity flow energy storage system, in this application, the driving mechanism 2 and the steering mechanism 3 are arranged at the four corners of the gravity flow energy storage system. The driving mechanism 2 includes an outer cable driving wheel 21 and an inner cable driving wheel 22, and the outer cable driving wheel 21 and the inner cable driving wheel 22 are vertically connected to the same horizontal transmission shaft 23.

[0102] The steering mechanism 3 includes an outer cable steering wheel 31 and an inner cable steering wheel 32, and the outer cable steering wheel 31 and the inner cable steering wheel 32 are vertically connected to the same horizontal transmission shaft 23.

[0103] Two outer cable drive wheels 21 and two inner cable drive wheels 22 arranged in parallel are respectively installed on each horizontal transmission shaft 23. At the same time, two outer cable turning wheels 31 and two inner cable turning wheels 32 arranged in parallel are respectively installed on each horizontal transmission shaft 23, which can ensure the closed loop of the two outer carrier cables 1a between the corresponding outer cable drive wheels 21 and outer cable turning wheels 31, and the closed loop of the two inner carrier cables 1b between the corresponding inner cable drive wheels 22 and inner cable turning wheels 32.

[0104] In view of the deformation and flipping of the above-mentioned carrier mechanism 5 at the carrier turning mechanism part, in order to ensure its support and guidance for the carrier mechanism 5, the carrier turning mechanism includes carrier turning wheels 8 connected in pairs to the horizontal transmission shaft 23. The carrier rack 50 is deformed and switched between a rigid structure and a flexible structure through the carrier turning wheels 8 and is redirected for operation.

[0105] In the gravity flow energy storage system with vertical lifting, four different horizontal transmission shafts 23 form a rectangular distribution in space. At the same time, based on the deformation and flipping of the carrier mechanism 5 from front to back and from top to bottom at the top of the gravity flow energy storage system during operation, the inner cable turning wheels 32 and the carrier turning wheels 8 may not be provided on the horizontal transmission shaft 23 at the front side of the top of the gravity flow energy storage system, which can maintain the backward and downward flipping of the carrier rack 50 in a state of stiffness support, and at the same time unload the energy storage blocks 6 during the flipping process.

[0106] Based on the fact that the drive mechanism 2 and the steering mechanism 3 are arranged at the four corner parts of the gravity flow energy storage system, in order to realize the stable, reliable and continuous traction of the outer carrier cable 1a and the inner carrier cable 1b on the carrier mechanism 5, the outer cable drive wheels 21 and the outer cable turning wheels 31 are arranged in the same vertical plane, and the inner cable drive wheels 22 and the inner cable turning wheels 32 are arranged in the same vertical plane. Further, the planes where the outer cable drive wheels 21 and the outer cable turning wheels 31 are located are parallel to the planes where the inner cable drive wheels 22 and the inner cable turning wheels 32 are located, which can form a relatively stable traction surface for the outer carrier cable 1a and the inner carrier cable 1b, and can maintain the stable and synchronous output of the traction force to ensure the stable and reliable continuous transmission state of the carrier structure.

[0107] The outer carrier cable 1a is wound between the corresponding outer cable drive wheel 21 and outer cable turning wheel 31, and is used to drive the outer carrier cable 1a to run by the outer cable drive wheel 21 through the frictional force of the circumferential contact, or to drive the outer cable drive wheel 21 to run by the outer carrier cable 1a.

[0108] In the double-cable lifting gravity flow energy storage system of the present application, based on the angles of the outer carrier cable 1a and the inner carrier cable 1b arranged inside and outside in the front-back correspondence, in order to reliably guide the inner carrier cable 1b, an inner cable guiding mechanism is further included. The inner cable guiding mechanism includes inner cable guiding wheels 9 arranged in pairs and located in the same vertical plane as the inner cable drive wheels 22 and the inner cable turning wheels 32;

[0109] The inner carrier cable 1b is wound around the corresponding inner cable drive wheel 22, inner cable turning wheel 32, and inner cable guide wheel 9, and is used to drive the carrier cable 4 to run by the frictional force of circumferential contact, or to drive the inner cable drive wheel 22 to run by the inner carrier cable 1b.

[0110] In one implementation form, the electric power generating mechanism 7 includes an electric generator, and the electric generator has both driving and discharging functions.

[0111] By connecting the output shaft of the electric generator to one end of the horizontal transmission shaft 23 through a coupling, during the energy storage stage, the outer cable drive wheel 21 and the inner cable drive wheel 22 can be actively rotated by the driving function, and at the same time, the energy storage block 6 located at the bottom of the energy storage system can be lifted by the carrier mechanism 5 to form a continuous gravity flow.

[0112] At the same time, during the discharging stage, the outer cable drive wheel 21 and the inner cable drive wheel 22 can be passively rotated by the continuously descending energy storage block 6, so that during the descending process of the lifted energy storage block 6, the potential energy-based gravity energy storage can be converted into electrical energy that the electric power generating mechanism 7 can generate to form a continuous energy flow.

[0113] In another specific implementation form, the electric power generating mechanism 7 includes a generator and a motor. The generator and the motor each include an output shaft, and the output shafts are respectively connected to the horizontal transmission shaft 23 through couplings. In this form, the generator and the motor can be connected to the same horizontal transmission shaft 23. By controlling the clutch between the horizontal transmission shaft 23 and the motor or the generator during the energy storage and discharging stages, on the premise that the outer cable drive wheel 21 and the inner cable drive wheel 22 maintain synchronous rotation in a transmission connection, the motor and the generator can perform different functions.

[0114] The generator and the motor can also be respectively connected to different horizontal transmission shafts 23. By connecting the different horizontal transmission shafts 23 to the motor or the generator during the energy storage and discharging stages, the above technical effects can also be achieved.

[0115] The inner carrier cable 1b passes around the inner cable guide wheel 9 to form an annular L-shaped running track of the inner carrier cable 1b between the inner cable guide wheel 9, the inner cable turning wheel 32, and the inner cable drive wheel 22. At the same time, during the synchronous traction process of the outer carrier cable 1a in the vertical lifting state, the outer carrier cable 1a forms a rectangular running track on the periphery of the running space of the inner carrier cable 1b, thereby ensuring the effective and continuous transmission of the carrier mechanism 5.

[0116] It should be noted that during the lifting process of the energy storage block 6 by the carrier mechanism 5 in the above setting form, both the outer carrier cable 1a and the inner carrier cable 1b should maintain a clockwise rotation trajectory. Only in this way can the technical requirement of not setting the inner cable turning wheel 32 and the carrier turning wheel 8 on the horizontal transmission shaft 23 at the front side of the top be met, and the inner cable guiding wheel 9 is arranged at the rear side of the bottom of the gravity flow energy storage system. If both the outer carrier cable 1a and the inner carrier cable 1b maintain a counterclockwise rotation trajectory, the horizontal transmission shaft 23 without the inner cable turning wheel 32 and the carrier turning wheel 8 and the inner cable guiding wheel 9 should be mirror-inverted accordingly to meet the technical requirement of unloading the energy storage block 6 when the carrier rack 50 is flipped and redirected at the top. This will not be elaborated here.

[0117] Based on the setting of the inner cable guiding wheel 9 and the annular L-shaped running trajectory of the inner carrier cable 1b, in combination with the attached drawings, when the inner cable connecting device 12 in the present application passes around the inner cable guiding wheel 9, the part of the inner cable connecting device 12 facing away from the jaw 14 passes around the inner cable guiding wheel 9. At the same time, when the inner cable connecting device 12 passes around the inner cable driving wheel 22, the part of the inner cable connecting device 12 facing away from the jaw 14 passes around the inner cable driving wheel 22. Thus, the inner cable guiding wheel 9 and the inner cable driving wheel 22 are both formed in the form of cable pressing wheels, while the remaining other inner cable turning wheels are in the form of cable supporting wheels. Through this matching characteristic of the inner cable connecting device 12 with the inner cable guiding wheel 9 and the inner cable driving wheel 22, it can be ensured that on the premise of the reliable connection and load transfer between the inner carrier cable 1b and the inner cable connecting device 12, the inner carrier cable 1b maintains a stable continuous closed-loop operation between the inner cable driving wheel 22, the inner cable turning wheel 32, and the inner cable guiding wheel 9.

[0118] In order to maintain a stable and reliable pressing fit between the carrier cable 4 and different driving wheels and turning wheels, wheel grooves are provided on the outer cable driving wheel 21, the inner cable driving wheel 22, the outer cable turning wheel 31, the inner cable turning wheel 32, and the inner cable guiding wheel 9. The carrier cable 4 is tightly wound around the wheel grooves, enabling the wheel grooves to play a good limiting effect.

[0119] During operation, the carrier cable 4 specifically runs in a circular motion under the frictional force when it is in a pressed state with the driving wheels and turning wheels. In order to enhance the frictional force, ensure synchronous operation, and prevent slipping, necessary anti-slip structures are provided in the wheel grooves to ensure the continuous and stable circular movement of the carrier cable 4.

[0120] During specific operation, during the lifting process of the energy storage block 6, the energy storage block 6 is first transported by the conveying rollers of the necessary bottom stacking yard to the bottom inlet of the gravity flow energy storage system. When the energy storage block 6 enters the system, the energy storage block 6 first contacts the inner cable connecting frame 52 that has turned forward from the rear side. The inner cable connecting frame 52 presses on the carrying steering wheel 8. The inner cable connecting frame 52 and the carrying steering wheel 8 jointly bear the load of the energy storage block 6, and transmit the load to the inner carrying cable 1b through the inner cable connecting device 12. At the same time, as the inner cable connecting device 12 follows the horizontal movement of the inner carrying cable 1b between the inner cable steering wheel and the inner cable guiding wheel 9, along with the flipping of the carrying rack 50 at the outer side of the inner cable steering wheel, the energy storage block 6 can finally be pressed on the carrying rack 50 in a horizontal state. During this process, the load of the energy storage block 6 is gradually transferred from the inner cable connecting frame 52 and the carrying steering wheel 8 to all the rack slats 53 and the clamping blocks 55, and the load is transmitted to the outer carrying cable 1a and the inner carrying cable 1b through the inner cable connecting device 12 and the outer cable connecting device 11.

[0121] The load forces the clamping block 55 to fill into the gap of the rack slat 53. The filling of the clamping block 55 squeezes the adjacent rack slats 53, so that the rack slats 53 and the clamping blocks 55 form a horizontally rigid connecting body. When the energy storage block 6 completely enters the system, the loads borne by the outer carrying cable 1a and the inner carrying cable 1b are the same. At the same time, both the inner cable connecting frame 52 and the outer cable connecting frame 51 reach the upper pressing part of the carrying steering wheel 8. Subsequently, the carrying mechanism 5 rises along with the outer carrying cable 1a and the inner carrying cable 1b. During the initial rising process, the inner cable connecting device 12 rotates relative to the inner cable connecting frame 52 and passes through the inner cable guiding wheel 9 in the form of a cable supporting wheel. Based on the coaxial connection of the inner cable driving wheel 22 and the outer cable driving wheel 21, and the coaxial connection of the inner cable steering wheel 32 and the outer cable steering wheel 31, the lifting processes of the outer carrying cable 1a and the inner carrying cable 1b are consistent, ensuring the smoothness of the carrying mechanism 5. When the carrying mechanism 5 is lifted to the highest position, the carrying rack 50 needs to deform and turn along with the carrying cable 4. At the same time, during the deformation and turning process, the energy storage block 6 is separated from the carrying rack 50 and enters the conveying rollers of the top stacking yard.

[0122] When the carrier mechanism 5 undergoes deformation and steering, it first undergoes deformation and steering at the positions of the corresponding steering wheels or driving wheels of the outer carrier cable 1a and the inner carrier cable 1b. The inner cable connection device 12 and the outer cable connection device 11 first come into contact with the steering wheel or driving wheel, and adjust the direction of the jaw 14 according to the direction of the carrier cable 4. Subsequently, the rack strips 53 and the clamping blocks 55 will also be steered one by one. When the first rack strip 53 enters the steering area, since it is connected to the adjacent connecting block 56b by a flexible connecting rope 54 and does not flip completely in the same plane, looseness occurs, resulting in a decrease in the extrusion force in the horizontal rigid state until it disappears. Due to the connection of the connecting rope 54, the rack strips 53 and the clamping blocks 55 will not fall apart. In this way, the rack strips 53 and the clamping blocks 55 pass through the steering area in sequence for flipping and reorientation until they turn from the horizontal state to the vertical state. It should be noted that the outer cable connection frame 51 needs to undergo two flips and reorientations in the two steering areas at the top, while the inner cable connection frame 52 needs to undergo one flip and reorientation at the top, which is determined by the different running trajectories between the outer carrier cable 1a and the inner carrier cable 1b, and will not be elaborated here.

[0123] After all the components of the carrier rack 50 have undergone flipping and reorientation and become vertical, they will follow the carrier cable 4 to cycle back to the initial position to perform the next transportation task of the energy storage block 6, and also need to go through the reorientation process at the rear side of the bottom before returning to the state where the carrier rack 50 receives the energy storage block 6.

[0124] In this application, the carrier rack 50 with both rigidity and flexibility not only improves the stability and adaptability of the carrier system, but also simplifies the complex mechanism design of the traditional rigid chain structure during steering.

[0125] The inner and outer double cables using the four-corner pulling method are beneficial to the fine motion control of the large-mass energy storage block 6, especially suitable for scenarios that require frequent lifting and lowering or have high requirements for docking accuracy. The independent drive control of the inner and outer double cables can be synchronously adjusted through a PLC or a servo system to achieve higher-precision positioning. At the same time, the front and rear angles of the carrier mechanism 5 can also be actively controlled to prevent tilting or sagging.

[0126] The carrier mechanisms 5 are equidistantly connected to the carrier cable 4, which can provide a balanced and continuous gravity flow. At the same time, the energy storage blocks 6 can correspond one by one to the carrier mechanisms 5, or can be spaced to correspond to the carrier mechanisms 5. The traveling speed of the carrier mechanisms 5 following the carrier cable 4 is adjustable, so as to achieve adjustable gravity flow. Thus, the energy flow can be adjusted as needed, and further the functions of "slow charge and fast discharge" or "charge and discharge as needed" can be realized.

[0127] 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 manner, and can be arranged in parallel multi-pieces and / or stacked up and down according to the structural type of the vertical structure to achieve larger-scale energy storage.

[0128] Taking one specific example to illustrate the energy storage system of the present application. When generating electricity, the energy storage block 6 has a main body made of reinforced concrete, with a density of 2,500 kg / m 3 . Its shape is a cuboid with a length of 1.2 meters × a width of 1.2 meters × a height of 1.0 meter, and it weighs 3.6 tons.

[0129] Assuming a vertical height difference of 200 meters, lifting a single energy storage block 6 from the bottom of the mountain to the top of the mountain can store energy E = mgh = 3.6×10 3 kg×9.8 m / s 2 ×200 m = 7,056,000 J = 1.96 kWh.

[0130] Referring to the operating speeds of equipment such as mine hoists, cranes, and elevators, if the speed is 8 m / s, it can travel 28.8 kilometers per hour. Assuming the energy storage blocks 6 are arranged at an interval of 15 meters, then 1920 energy storage blocks 6 can be transported to the top of the mountain per hour, and the energy that can be stored per hour is 1920 pieces × 1.96 kWh / piece = 3763.2 kW·h ≈ 3.8 MWh.

[0131] 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 on vertical structures, or the speed of the carrier cable 4 can be increased or the spacing of the energy storage blocks 6 can be reduced to expand the energy storage scale.

[0132] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0133] 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 double-cable lifting gravity flow energy storage system, characterized in that: include: Carrying rope mechanism, carrying mechanism, driving mechanism and steering mechanism; The carrying rope mechanism comprises an outer carrying rope and an inner carrying rope arranged on both sides of the carrying mechanism, wherein the outer carrying rope and the inner carrying rope respectively comprise two paths, which are closed and surround between the driving mechanism and the steering mechanism, and can run continuously under the drive of the driving mechanism; The outer carrying ropes and the inner carrying ropes are connected by a plurality of carrying mechanisms that can run along the closed loop of the carrying ropes, and the carrying mechanisms are used to carry energy storage blocks as energy storage carriers, and can drive the energy storage blocks to rise and fall vertically or obliquely on the gravity flow energy storage system; A transport steering mechanism is provided between the two inner transport ropes, wherein the transport mechanism comprises a transport rack, and the transport rack can be deformed and redirected at the transport steering mechanism position; The driving mechanism is connected to an electric generator mechanism, which continuously lifts the energy storage blocks located at the bottom storage yard vertically to form a continuous gravity flow through the driving mechanism, and continuously lowers the energy storage blocks located at the top storage yard vertically to convert the gravitational potential energy into electrical energy of the electric generator mechanism to form a continuous energy flow.

2. The double-cable lifting gravity flow energy storage system according to claim 1 is characterized in that: The transport rack comprises an outer cable connection frame and an inner cable connection frame located at the front and rear sides, and both ends of the outer cable connection frame are connected with outer cable connection devices, and the outer cable connection devices are respectively fixedly connected with the two outer transport cables; Both ends of the inner cable connecting frame are connected with inner cable connecting devices, and the inner cable connecting devices are respectively fixedly connected with the two inner carrying cables; The outer cable connecting device is pivotally connected to both ends of the outer cable connecting frame through a slewing bearing; The inner cable connecting device is pivotally connected to the two ends of the inner cable connecting frame through a slewing bearing.

3. The double-cable lifting gravity flow energy storage system according to claim 2 is characterized in that: The transport rack also includes a plurality of rack strips arranged side by side between the outer cable connecting frame and the inner cable connecting frame, and the plurality of rack strips are connected by connecting ropes located below the plurality of rack strips; The connecting rope comprises at least two paths, which are arranged at two ends of the rack strips. A clamping block is arranged between adjacent rack strips, and the clamping block is fixedly connected to the connecting rope.

4. The double-cable lifting gravity flow energy storage system according to claim 3 is characterized in that: The rack strip is connected to the connecting rope through a rope clamp, and the rope clamp comprises a rope clamp block and a connecting block, and the rope clamp block and the connecting block are both provided with an arc groove for accommodating the connecting rope; The rope clamping block includes screw rods arranged in pairs, which pass through the connecting block and the rack strips in sequence and are fixed by locking nuts on the top surface of the rack strips.

5. The double-cable lifting gravity flow energy storage system according to claim 2, characterized in that: The outer cable connection device and the inner cable connection device both include a fixing device fixed on the carrying cable; The fixing devices all include a fixing claw with a jaw, and the carrying rope is fixedly installed in the jaw.

6. The double-cable lifting gravity flow energy storage system according to claim 5, 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 double-cable lifting gravity flow energy storage system according to claim 6, characterized in that: The driving mechanism comprises an outer cable driving wheel and an inner cable driving wheel, wherein the outer cable driving wheel and the inner cable driving wheel are vertically connected to the same horizontal transmission shaft; The steering mechanism comprises an outer cable steering wheel and an inner cable steering wheel, wherein the outer cable steering wheel and the inner cable steering wheel are vertically connected to the same horizontal transmission shaft; The transport steering mechanism comprises a pair of transport steering wheels connected to the horizontal transmission shaft, and the transport rack is deformed and switched between a rigid structure and a flexible structure through the transport steering wheels to be redirected; The horizontal transmission shaft located at the top front side of the gravity flow energy storage system is not provided with the inner cable steering wheel and the transport steering wheel; The driving mechanism and the steering mechanism are arranged at the four corners of the gravity flow energy storage system, the outer cable driving wheel and the outer cable steering wheel are arranged on the same vertical plane, and the inner cable driving wheel and the inner cable steering wheel are arranged on the same vertical plane; The planes on which the outer cable driving wheel and the outer cable steering wheel are located are arranged parallel to the planes on which the inner cable driving wheel and the inner cable steering wheel are located; The outer carrying rope is wound around the corresponding outer rope driving wheel and the outer rope steering wheel, and is used to make the outer rope driving wheel drive the outer carrying rope to run through the friction force of the wound contact, or make the outer carrying rope drive the outer rope driving wheel to run; It also includes an inner cable guiding mechanism, the inner cable guiding mechanism includes inner cable guiding wheels arranged in pairs and located in the same vertical plane as the inner cable driving wheel and the inner cable steering wheel; The inner carrying rope is wrapped around the corresponding inner rope driving wheel, the inner rope steering wheel and the inner rope guide wheel, and is used to enable the inner rope driving wheel to drive the inner carrying rope to run through the friction force of the surrounding contact, or to enable the inner carrying rope to drive the inner rope driving wheel to run.

8. The double-cable lifting gravity flow energy storage system according to claim 7, characterized in that: The electric power generation mechanism includes an electric generator, and the electric generator includes an output shaft, and the output shaft is connected to one end of the horizontal transmission shaft through a coupling; Alternatively, the electric power generation 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 horizontal transmission shaft via a coupling.

9. The double-cable lifting gravity flow energy storage system according to claim 7, characterized in that: The inner carrying rope is wound around the inner rope guide wheel so as to form an annular L-shaped running track between the inner rope guide wheel, the inner rope steering wheel and the inner rope driving wheel.

10. The double-cable lifting gravity flow energy storage system according to claim 7, characterized in that: When the inner cable connecting device passes through the inner cable guide wheel, the portion of the inner cable connecting device facing away from the jaws passes around the inner cable guide wheel, so as to make the inner cable guide wheel form a cable pressing wheel.

11. The double-cable lifting gravity flow energy storage system according to claim 7, characterized in that: The outer cable driving wheel, the inner cable driving wheel, the outer cable steering wheel, the inner cable steering wheel and the inner cable guide wheel are all provided with wheel grooves, and the carrying rope is compressed and surrounded in the wheel grooves.

12. The double-cable lifting 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.

13. The double-cable lifting gravity flow energy storage system according to claim 1, characterized in that: The double-cable lifting gravity flow energy storage system comprises multiple sets, and the multiple sets of the double-cable lifting gravity flow energy storage system are arranged in multiple rows in parallel and / or stacked up and down on a vertical structure.

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