Bulk material conveying gravity flow energy storage system and energy storage method

Abstract

The invention relates to a bulk cargo conveying gravity flow energy storage system and energy storage method.The bulk cargo conveying gravity flow energy storage system comprises a double-circulation bearing mechanism, a double-circulation traction mechanism, a double-wheel driving mechanism, a carrying mechanism and a bulk cargo conveying mechanism; the bulk material conveying mechanism comprises a closed surrounding conveying belt and is used for carrying energy storage bulk materials serving as energy storage carriers. A plurality of carrying mechanisms which can operate synchronously with the two traction cables are connected between the two traction cables, and the carrying mechanisms can operate along the double-circulation bearing mechanism in a closed-loop mode; the carrying mechanism is connected with the conveying belt so that the carrying mechanism can drive the conveying belt to continuously operate under the traction driving of the traction cable and the bearing supporting of the double-circulation bearing mechanism. The bulk energy storage body can be used for providing continuous gravity flow so as to achieve continuous energy flow, and the problems that existing gravity energy storage is intermittent, site selection is difficult, and investment is large are solved.

Description

Technical Field

[0001] This application relates to the field of gravity energy storage, and more particularly, to a bulk material conveying gravity flow energy storage system and an energy storage method. Background Art

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

[0003] As a means of regulating power supply and demand, the energy storage system is a key support and an inevitable requirement for the development of new energy. Gravity energy storage is more suitable for large-scale power grid energy storage and medium- and long-term energy storage scenarios due to its advantages such as long energy storage duration, no attenuation, long service life, high safety, and low maintenance cost. Especially in areas rich in wind and light resources but with unstable power output, it can effectively regulate the power load, achieve energy balance and transfer, and improve the consumption capacity of renewable energy.

[0004] In addition, some gravity energy storage technologies can also carry out distributed deployment in combination with existing infrastructure such as abandoned mines, barren mountains and slopes, and high-rise buildings, which conforms to the development direction of land and energy conservation. However, most gravity energy storage systems have intermittent charging / discharging problems because they rely on the lifting and lowering of heavy objects to achieve potential energy conversion.

[0005] Therefore, applying the mechanism of bulk material transportation to the field of gravity energy storage, a bulk material conveying gravity energy storage system that can achieve continuous charging / discharging has emerged. However, the existing bulk material conveying gravity energy storage system conveys bulk materials through belt traction, and there is a depression resistance between the belt and the idler, and there is an extrusion resistance when the materials on the belt pass through the idler, resulting in problems of excessive running resistance and low carrying efficiency. At the same time, the belt bears a large tensile stress in the traveling direction, and is prone to longitudinal tearing, belt breakage and other faults, and it is difficult to be engineered under the energy storage efficiency requirements. Summary of the Invention

[0006] The purpose of this application is to provide a bulk material conveying gravity flow energy storage system and an energy storage method, which can solve the existing technical problems of the above-mentioned gravity energy storage system.

[0007] To achieve the above purpose, in the first aspect, the present invention provides a bulk material conveying gravity flow energy storage system, including a double-cycle bearing mechanism, a double-cycle traction mechanism, a double-wheel drive mechanism, a carrying mechanism, and a bulk material conveying mechanism; The double-loop traction mechanism includes two closed-loop traction cables that are parallel and inclined upward. The double-wheel drive mechanism includes two driving wheels that are parallel and vertically installed. At least a part of the traction cable is wound around the driving wheels and continuously runs under the drive of the driving wheels; The bulk material conveying mechanism includes a closed-loop conveying belt for carrying energy storage bulk materials as energy storage carriers; A plurality of carrier mechanisms that can run synchronously with the traction cables are connected between the two traction cables. The carrier mechanisms can run in a closed loop along the double-loop bearing mechanism; The carrier mechanism is connected to the conveying belt so that the carrier mechanism can drive the conveying belt to continuously run under the traction of the traction cable and the support of the double-loop bearing mechanism; The driving wheel is connected with an electric power generation mechanism; The electric power generation mechanism is used to drive the driving wheel to rotate actively, and a continuous gravity flow is formed by continuously lifting the energy storage bulk materials; Moreover, the driving wheel is driven to rotate by the continuously descending energy storage bulk materials, so as to convert the gravitational potential energy into the electric energy of the electric power generation mechanism to form a continuous energy flow.

[0008] In an alternative embodiment, each carrier mechanism includes a carrier rack connected between the conveying belt and the traction cable. The carrier rack includes cable connection racks on both sides of the traveling direction. Both ends of the cable connection rack are provided with cable fixing devices. The cable fixing devices are rotatably pivoted at both ends of the cable connection rack through rotary bearings, and the cable fixing devices are fixedly connected to the traction cable.

[0009] In an alternative embodiment, the carrier rack further includes a plurality of rack strips arranged side by side between the cable connection racks. The plurality of rack strips are connected by an assembly mechanism located below them; The plurality of rack strips are arranged at intervals along the traveling direction of the carrier mechanism. Traveling wheels are connected to the rack strips on both sides of the traveling direction. The traveling wheels can roll and run along the double-loop bearing mechanism; Both ends of the rack strip are connected with wheel set fixing frames. The inner ring of the traveling wheel is installed on the wheel set fixing frame through a wheel shaft, and the outer ring of the traveling wheel rolls and runs on the double-loop bearing mechanism.

[0010] In an alternative embodiment, the double-loop bearing mechanism includes a closed-loop structure, and the traction cable is arranged inside the double-loop bearing mechanism; The walking wheels and the rope fixing devices are respectively arranged on the upper and lower sides of the carrying rack. Pressing plates are connected to both ends of each rack strip board. The edge part of the conveyor belt is clamped between the pressing plate and the rack strip board, and the pressing plate is fixedly connected to the rack strip board by bolts.

[0011] In an alternative embodiment, clamping blocks are arranged between adjacent rack strip boards, and the width of the clamping blocks is the same as the gap between the rack strip boards. The clamping blocks and the rack strip boards are connected into an integral structure by the assembling mechanism. The assembling mechanism includes a guiding chain arranged under the rack strip boards. The guiding chain includes a plurality of chain links that are articulated and connected alternately inside and outside. Each chain link is respectively arranged corresponding to the clamping block and the rack strip board, and is connected to the bottoms of the clamping block and the rack strip board through fixing plates.

[0012] In an alternative embodiment, a gap is left between adjacent rack strip boards. The assembling mechanism includes a guiding rigid chain arranged under the rack strip boards. The guiding rigid chain is a one-way bending structure that can only bend away from the rack strip board. It includes a plurality of chain plates that are articulated and connected alternately inside and outside. The chain plates include an outer chain plate and an inner chain plate that are sleeved. Each outer chain plate is respectively arranged corresponding to the rack strip board, and is connected to the bottom of the rack strip board through a fixing plate.

[0013] In an alternative embodiment, the double-wheel drive mechanism includes a horizontally arranged transmission shaft. Two driving wheels are vertically connected to the transmission shaft and are arranged at intervals along the axial direction of the transmission shaft. Or, the two driving wheels are independently driven and are mirror-symmetrically arranged. Two traction cables are respectively wound around the corresponding driving wheels to drive the traction cables to run by the driving wheels through the frictional force of circumferential contact. The end of the transmission shaft is connected to the electric power generation mechanism. The electric power generation mechanism includes an electric generator. The electric generator includes an output shaft, and the output shaft is connected to the horizontal transmission shaft through a coupling. Two traction cables respectively include single closed-loop annular traction cables, and a section of the annular traction cable is wound around the driving wheel.

[0014] In an alternative embodiment, the double-wheel drive mechanism is arranged on the top of the energy storage system. A detour wheel set is arranged at the bottom of the energy storage system. The detour wheel set includes two vertically installed steering wheels arranged in parallel. The steering wheels have the same structure as the driving wheels, and the wheel surfaces of the steering wheels and the driving wheels are arranged on the same plane. Each of the traction cables is enclosed and wound between the corresponding driving wheels and the steering wheels in a group. Grooves are respectively provided on the wheel surfaces of the driving wheels and the steering wheels, and the traction cables are tightly wound in the grooves. Alternatively, the dual-wheel drive mechanism is arranged at the bottom of the energy storage system, and the bypass wheel set is arranged at the top of the energy storage system. Alternatively, the dual-wheel drive mechanism is arranged both at the top and at the bottom of the energy storage system.

[0015] In an alternative embodiment, guide sprockets are respectively arranged in pairs between the driving wheels and between the steering wheels. The guide sprockets are coaxially connected with the driving wheels or the steering wheels and are meshed and connected with the assembly mechanism.

[0016] In an alternative embodiment, the dual-loop carrying mechanism includes two parallel upwardly inclined closed-loop carrying tracks. The two carrying tracks include U-shaped steel channels with their opening directions facing each other. The traveling wheels are accommodated in the U-shaped steel channels and can roll along the U-shaped steel channels. The carrying track includes an upper branch track and a lower branch track. The upper branch track includes an upward arc turning section, an upward bottom horizontal section, an upward inclined section, and an upward top horizontal section. The lower branch track includes a downward arc turning section, a downward top guiding section, a downward inclined section, and a downward bottom guiding section. The upward arc turning section is arranged on the periphery of the steering wheel, the downward arc turning section is arranged on the periphery of the driving wheel, and the downward top guiding section extends curvedly towards the upper branch track. The annular traction cable and different sections corresponding to the carrying track are in the same plane, forming the winding plane of the traction cable.

[0017] In an alternative embodiment, the dual-loop carrying mechanism includes two pairs of parallel upwardly inclined carrying cables, and bypass tracks located on both the top and bottom sides. The carrying cables include upper branch carrying cables and lower branch carrying cables respectively arranged in pairs. Rope grooves for limiting and cooperating with the carrying cables are provided on the outer side walls of the traveling wheels. The bypass tracks are used for the traveling wheels to turn and connect between the upper branch carrying cables and the lower branch carrying cables. The bypass tracks include an upper branch bypass track and a lower branch bypass track. The upper branch carrying cables and the lower branch carrying cables are respectively connected end to end with the upper branch bypass track and the lower branch bypass track to form a closed-loop structure.

[0018] In an alternative embodiment, it further includes a stacking yard for storing the energy storage bulk materials. The stacking yard is arranged at the top and bottom of the energy storage system, and the energy storage bulk materials are reciprocally transported between the stacking yard and the bulk material conveying mechanism by a transfer device.

[0019] Second, the present invention provides a method for energy storage by gravity flow of bulk material transportation, which is carried out by the bulk material transportation gravity flow energy storage system described in the foregoing embodiments, and includes an energy storage stage and a discharge stage: In the energy storage stage, the energy storage bulk materials located in the stacking yard at the bottom of the energy storage system are continuously transported upward by the bulk material transportation gravity flow energy storage system, and a continuous gravity flow is formed by the lifting of the energy storage bulk materials; In the discharge stage, the energy storage bulk materials located in the stacking yard at the top of the energy storage system are continuously transported downward by the bulk material transportation gravity flow energy storage system, and a continuous energy flow is formed by the falling of the energy storage bulk materials.

[0020] In an alternative embodiment, the conveying belt is adjustable according to the traveling speed of the carrying mechanism and the carrying capacity of the energy storage bulk materials, so as to realize the adjustability of the gravity flow.

[0021] In an alternative embodiment, there are multiple sets of the bulk material transportation gravity flow energy storage systems, and the multiple sets of the bulk material transportation gravity flow energy storage systems are arranged side by side in multiple rows and / or stacked vertically on the hillside terrain.

[0022] The bulk material transportation gravity flow energy storage system in the present application can utilize the bulk energy storage body to provide a continuous gravity flow so as to realize a continuous energy flow, and solve the problems of intermittency, difficult site selection, large investment, etc. of the existing gravity energy storage.

[0023] By applying the mechanism of bulk material transportation to the field of gravity energy storage, continuous energy storage and discharge can be realized. Taking the traction cable as the traction main body, compared with the existing traditional traction of the belt, the bulk material conveying mechanism can only load the bulk materials without bearing the tensile stress along the traveling direction, thereby reducing the requirement for the performance of the belt. A more economical general standard belt can be used, and the service life can be greatly improved. At the same time, the belt that does not bear the traction tensile stress can also avoid faults such as longitudinal tearing and belt breakage, and ensure the continuous stability of the gravity flow.

[0024] The traditional belt conveyor supports the upper and lower branch belts by rollers. When the traction belt runs, it drives the rollers to rotate. In the present invention, the conveying belt is supported by the carrying mechanism, and combined with the synchronous traction operation of the traction cable for the carrying mechanism, the indentation resistance between the traditional belt and the rollers and the extrusion resistance when the materials on the belt pass through the rollers are avoided, and the running resistance can be greatly reduced, and the carrying efficiency can be improved.

[0025] By replacing the rollers with the carrying mechanism and connecting the carrying mechanism and the conveyor belt as a whole, the carrying mechanism and the conveyor belt can run continuously under the traction of the traction rope. Combined with the carrying mechanism, it can roll along the closed loop of the double-circulation carrying mechanism, which can reduce the running resistance to the greatest extent. The rolling resistance during the rolling operation is much smaller than the rolling resistance of the rollers, which can reduce the ineffective power consumption during the traction process and ensure the energy storage efficiency.

[0026] Through the mutual cooperation of the bearing mechanism, the traction mechanism and the driving mechanism, the continuous and steady-state traction operation of the carrying mechanism and the bulk material conveying mechanism can be formed during the operation of the driving mechanism. Combined with the transportation of energy storage bulk materials by the bulk material conveying mechanism, stable and continuous gravity flow and energy flow can be obtained in the energy storage stage and the discharge stage. Under the premise of improving the carrying capacity, the high-efficiency operation of the energy storage and power generation states is guaranteed, and high-power storage / discharge of electric energy can be realized.

[0027] By decoupling the load-bearing and traction relationship formed by the load-bearing mechanism and the traction mechanism, compared with the common gravity flow energy storage system, the system has a stronger load-bearing capacity and a more balanced load, making the process of forming continuous gravity flow and energy flow more stable and reliable.

[0028] The driving wheels arranged in parallel can reduce the space occupied, and are conducive to forming driving traction surfaces corresponding to the two traction ropes, thereby ensuring a stable and reliable continuous circulation of the traction ropes.

[0029] By cooperating with each other, a four-in-one composite transmission system is constructed, which improves safety and stability to the greatest extent compared with the traditional single belt traction.

[0030] The bulk material conveying gravity flow energy storage method of the present invention can form a continuous steady-state gravity flow and energy flow. By adjusting the travel 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 "slow charging and fast discharging" or "charging and discharging on demand" function.

[0031] By combining multiple bulk material conveying gravity flow energy storage systems to realize parallel multi-assembly and / or up and down stacking arrangements according to the hillside terrain, larger-scale energy storage can be achieved.

[0032] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and 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.

[0034] Figure 1 It is a schematic structural diagram of the gravity flow energy storage system for bulk material transportation on the load-bearing track in the present application; Figure 2 It is a schematic structural diagram of the gravity flow energy storage system for bulk material transportation on the load-bearing cable in the present application; Figure 3 For Figure 2 partial enlarged structural diagram; Figure 4 It is a schematic structural diagram of the carrier mechanism with a guiding chain as the assembly mechanism in the present application; Figure 5 For Figure 4 top structural diagram; Figure 6 It is a schematic structural diagram of the carrier mechanism with a guiding rigid chain as the assembly mechanism in the present application; Figure 7 For Figure 6 top structural diagram; Figure 8 It is a schematic structural diagram of the driving structure; Figure 9 It is a schematic structural diagram of the rope fixing device.

[0035] Icon: 1 - load-bearing mechanism; 10 - load-bearing track; 10a - upper branch track; 10a1 - upward arc turning section; 10a2 - upward bottom horizontal section; 10a3 - upward inclined section; 10a4 - upward top horizontal section; 10b - lower branch track; 10b1 - downward arc turning section; 10b2 - downward top guiding section; 10b3 - downward inclined section; 10b4 - downward bottom guiding section; 100 - load-bearing cable; 100a - upper branch load-bearing cable; 100b - lower branch load-bearing cable; 110 - detour track; 110a - upper branch detour track; 110b - lower branch detour track; 2 - towing cable; 21 - upward towing cable; 211 - turning wheel section; 212 - lower horizontal section; 213 - upper inclined section; 214 - upper horizontal section; 22 - downward towing cable; 221 - driving wheel section; 222 - upper arc redirecting section; 223 - lower inclined section; 224 - lower arc redirecting section; 23 - Traction cable guiding device; 3 - Driving wheel; 31 - Transmission shaft; 32 - Steering wheel; 33 - Groove; 34 - Guide sprocket; 4 - Carrying mechanism; 4a - Carrying rack; 41 - Rope connecting bracket; 42 - Rack slat; 43 - Assembly mechanism; 44 - Traveling wheel; 45 - Wheel set fixing bracket; 46 - Pressure plate; 47 - Fixing plate; 40a - Clamping block; 40b - Guide chain; 40c - Chain link; 400a - Guide rigid chain; 400b - Chain plate; 5 - Electric power generating mechanism; 6 - Driving support; 7 - Rope fixing device; 71 - Slewing bearing; 72 - Jaw; 8 - Conveyor belt; 8a - Corrugated sidewall belt; 81 - Base belt; 82 - Corrugated sidewall; 83 - Cross partition. Detailed implementation manners

[0036] 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 with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed 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", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0039] The bulk material conveying gravity flow energy storage system and energy storage method in this application are mainly used in the field of gravity energy storage. By optimizing the structure and energy storage method of the existing gravity energy storage system, a continuous and stable gravity flow and energy flow can be formed. At the same time, the disadvantages of the traditional traction belt in the application process of gravity energy storage can be avoided, and the performance requirements of the conveying belt 8 can be reduced.

[0040] See Figures 1 - 3 , in the bulk material conveying gravity flow energy storage system of the present invention, the main structure includes a double-loop bearing mechanism 1, a double-loop traction mechanism, a double-wheel drive mechanism, a carrier mechanism 4, and a bulk material conveying mechanism.

[0041] The bulk material conveying mechanism includes a closed-loop conveying belt 8, and a connection and traction relationship is established with the double-loop traction mechanism through the carrier mechanism 4. The conveying belt 8 is mainly used to convey and carry the energy storage bulk material as the energy storage carrier, and the continuous gravity flow of energy storage and the continuous energy flow of discharging are respectively formed by the lifting and lowering of the energy storage bulk material.

[0042] By lifting and transporting the energy storage bulk material through the continuously traction-operated conveying belt 8, a steady-state continuous gravity flow can be formed during the energy storage stage, and at the same time, a steady-state continuous energy flow can be formed through the release and conversion of the gravity flow during the discharging stage.

[0043] The double-loop bearing mechanism 1 is mainly used to bear the conveying belt 8, providing an effective bearing effect, and can realize the support and bearing of the carrier mechanism 4, the gravity energy storage bulk material, and the conveying belt 8, improving the safety margin of the system operation.

[0044] The double-loop bearing mechanism 1 in this application includes different structural forms, see Figure 1 and Figure 2 , which respectively include a load-bearing track type bulk material conveying gravity flow energy storage system and a load-bearing cable type bulk material conveying gravity flow energy storage system, and can be actually arranged according to different topographies.

[0045] Specifically, the load-bearing track type bulk material conveying gravity flow energy storage system is more suitable for being arranged on the hillside terrain, and the load-bearing track 10 is supported by brackets with different heights.

[0046] The load-bearing cable type bulk material conveying gravity flow energy storage system is more suitable for being arranged on the gully terrain, and the load-bearing cable 100 can span the gully, greatly reducing the civil engineering and steel structure costs, and at the same time avoiding large-scale ground occupation and protecting the vegetation.

[0047] From the perspective of continuous traction, the double-loop traction mechanism in the present invention includes two parallel upwardly inclined closed-loop traction cables 2, and the double-wheel drive mechanism includes two parallel drive wheels 3. At least a part of the traction cable 2 is wound around the drive wheel 3 and continuously runs under the drive of the drive wheel 3.

[0048] Two parallel upwardly inclined and closed-loop surrounding traction cables 2 can operate continuously and dynamically under the drive of two vertically installed drive wheels 3 arranged in parallel, forming an operating structure for providing a traction effect. Combining with a carrier mechanism 4 that can operate along the load-bearing mechanism 1, and the connection and traction relationship between the conveyor belt 8 and the traction cable 2 established through the carrier mechanism 4, a continuous traction operation state of the conveyor belt 8 under the dual action of the load-bearing mechanism 1 and the traction mechanism can be formed.

[0049] Through the carrier mechanism 4, the traction force is connected between the conveyor belt 8 and the traction cable 2, thereby reducing the direct traction force on the belt, reducing the performance requirements of the conveyor belt 8, and at the same time enabling the conveyor belt 8 to follow the carrier mechanism 4 to operate continuously and stably under the traction of the traction mechanism and the load-bearing support of the load-bearing mechanism 1, ensuring the stable and reliable gravity flow and energy flow.

[0050] The closed-loop surrounding conveyor belt 8 can operate continuously in a closed loop, maintaining a continuous carrying state of the energy storage bulk material. At the same time, multiple carrier mechanisms 4 are connected between the two traction cables 2 and can operate synchronously with the traction cables 2 under the traction drive of the traction cables 2. Further, by connecting multiple carrier mechanisms 4 to the conveyor belt 8 respectively, the traction forces connected by the multiple carrier mechanisms 4 to the conveyor belt 8 can be dispersed, reducing the concentration of local traction stress.

[0051] From the perspective of load-bearing, the carrier mechanism 4 can operate in a closed loop along the double-loop load-bearing mechanism 1. Through the set load-bearing mechanism 1, the conveyor belt 8 and the energy storage bulk material carried by it can be supported, ensuring the stable and efficient operation of the conveyor belt 8 during continuous operation.

[0052] In this application, the carrier mechanism 4 is connected to the conveyor belt 8, enabling the carrier mechanism 4 to drive the conveyor belt 8 to operate continuously under the traction drive of the traction cable 2 and the load-bearing support of the double-loop load-bearing mechanism 1, thereby avoiding the direct traction force borne by the existing traditional traction belt.

[0053] The mutual cooperation of the load-bearing mechanism 1 and the traction mechanism can form a separated setting form of load-bearing and traction. When the conveyor belt 8 is carrying, by using the load-bearing mechanism 1 to bear the weights of the carrier mechanism 4, the bulk material conveying mechanism, and the energy storage bulk material, and the traction mechanism to pull the carrier mechanism 4, the bulk material conveying mechanism, and the energy storage bulk material to slide along the load-bearing mechanism 1.

[0054] Through the above functional decoupling of load-bearing and traction, the stress concentration problem of the traditional single-cable load-bearing traction system can be solved, and at the same time, the problem of the conveyor belt 8 being directly stressed and pulled can also be avoided. It can reduce the mutual interference between load-bearing and traction in the form of independent structures cooperating with each other, ensuring the stable and reliable load-bearing effect and traction effect.

[0055] Two vertically installed driving wheels 3 arranged in parallel can be surrounded by the traction cable 2. The traction cable 2 is wound around the driving wheels 3. Combining the friction between the traction cable 2 and the driving wheels 3, the driving wheels 3 drive the traction cable 2 to move stably and continuously during the rotation operation, ensuring the reliable stability of the continuous gravity flow and energy flow.

[0056] The vertically installed driving wheels 3 can reduce the occupied space compared with the traditional horizontal wheel form, break through the terrain slope limit, have simpler requirements for the terrain, are convenient to install in more slope sections, can be deployed in various terrains, and are especially suitable for complex geological environments such as mountains, hills, and gullies. On this basis, it is beneficial to form a driving and traction surface that cooperates with the traction cable 2, ensuring that the traction cable 2 moves continuously on the shaped winding surface.

[0057] The electric power generating mechanism 5 connected to the driving wheels 3 can drive the driving wheels 3 to rotate actively, and form a continuous gravity flow through the continuously lifted energy storage bulk materials.

[0058] At the same time, it can drive the driving wheels 3 to rotate passively through the continuously descending energy storage bulk materials, so that the lifted energy storage bulk materials can convert the gravitational energy in the form of potential energy into electrical energy that the electric power generating mechanism 5 can generate during the descending process, forming a continuous energy flow.

[0059] From the perspective of facilitating the belt conveyor of the 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 wound base belt 81, as well as corrugated sidewalls 82 and cross partitions 83 arranged on the material conveying surface of the base belt 81. The corrugated sidewalls 82 are continuously arranged on both sides in the length direction of the base belt 81, and the cross partitions 83 are arranged at intervals between the corrugated sidewalls 82.

[0060] The corrugated sidewalls 82 and the cross partitions 83 can form a multi-compartment space for conveying materials on the conveyor belt 8, which is beneficial to form a multi-compartment structure of the partition cavity. During the operation, the energy storage bulk materials can be filled into each cavity according to needs, or filled into the energy storage bulk materials at intervals, realizing the scale adjustment of the gravity flow and energy flow.

[0061] From the connection angle between the carrying mechanism 4 and the conveyor belt 8, the corrugated sidewalls 82 are vertically perpendicular to the belt surface of the base belt 81, and the roots of the corrugated sidewalls 82 are connected to the inner side of the edge of the base belt 81, used to form a clamping space for the carrying mechanism 4 to the conveyor belt 8.

[0062] The corrugated sidewall belt 8a can achieve a conveying angle of 0° to 90°, and can achieve the maximum height difference lift within the shortest belt length. The corrugated sidewalls 82 and the cross partitions 83 can prevent the materials from slipping. The sidewall height, partition spacing, and base belt width can be customized according to needs.

[0063] The base belt 81 is laid on the carrier rack 4a of the carrier mechanism 4 and fixed to the carrier rack 4a by a pressing device, so that the base belt 81 moves together with the carrier rack 4a. The base belt 81, the corrugated edge 82 and the cross partition 83 are integrally formed by a process.

[0064] The idler of the traditional belt is not installed directly opposite to the belt, which has a twisting effect on the belt and is prone to belt deviation. In this application, the carrier mechanism 4 is fixed to the conveyor belt 8 to avoid the problem of belt deviation. The idlers are arranged throughout the conveying line, and a large amount of manpower, material resources and time are required for inspection and maintenance. In this application, the carrier rack 4a can be repaired at a specific position.

[0065] In each carrier mechanism 4 of the present invention, it includes a carrier rack 4a connected between the conveyor belt 8 and the towing cable 2. The carrier rack 4a includes cable connection racks 41 located on both sides in the traveling direction. Through the cable connection racks 41, a connection relationship can be established between the carrier rack 4a and the towing cable 2, so that the towing cable 2 drives the carrier rack 4a and the conveyor belt 8 to run continuously.

[0066] In the connection structure between the carrier rack 4a and the towing cable 2, cable fixing devices 7 are provided at both ends of the cable connection rack 41. The cable fixing devices 7 are pivotally connected to both ends of the cable connection rack 41 through rotary bearings 71 and the cable fixing devices 7 are fixedly connected to the towing cable 2. Through this setting method, the towing cable 2 can drive the carrier rack 4a to run synchronously, and at the same time, the carrier rack 4a can flexibly bend and deform following the conveyor belt 8 at the driving wheel 3 and the steering wheel 32 parts, thereby ensuring the continuous and stable running state of the carrier rack 4a and the conveyor belt 8.

[0067] Combined with Figure 9 , the cable fixing device 7 includes a fixed connection part with a jaw 72, which can make the jaw 72 clamp and fix the towing cable 2. At the same time, the setting of the rotary bearing 71 can provide for the carrier rack 4a to form an adaptive steering during the flexible deformation process and maintain a real-time connection relationship with the towing cable 2.

[0068] The carrier rack 4a in the present invention is specifically a structure form combining rigidity and flexibility. During operation, it can maintain the rigid support state of the planar frame, and at the same time can flexibly bend and deform at the top and bottom sides of the energy storage system. On the one hand, it adapts to the circumferential direction of the conveyor belt 8, and on the other hand, it can flexibly bend following the towing cable 2 at the turning part.

[0069] Combined with Figures 4 - 7 , specifically, the carrier rack 4a further includes multiple rows of rack strips 42 arranged side by side between the cable connection racks 41. The multiple rows of rack strips 42 are connected by an assembly mechanism 43 located below them, so as to realize the conversion of the rigid-flexible deformation of the multiple rows of rack strips 42.

[0070] Multiple rows of shelving strips 42 are arranged at intervals along the traveling direction of the transport shelving 4a. From the perspective of establishing a load-bearing relationship with the load-bearing mechanism 1, walking wheels 44 are connected to the shelving strips 42 on both sides of the traveling direction. The walking wheels 44 can roll along the double-loop load-bearing mechanism 1, so as to realize the continuous operation of the transport shelving 4a along the load-bearing track 10 or the load-bearing cable 100.

[0071] From the perspective of the installation of the walking wheels 44 on the transport shelving 4a, both ends of the shelving strip 42 are connected with wheel set fixing frames 45. The inner ring of the walking wheel 44 is installed on the wheel set fixing frame 45 through a wheel axle, and the outer ring of the walking wheel 44 rolls on the double-loop load-bearing mechanism 1.

[0072] The double-loop load-bearing mechanism 1 includes an enclosed structure. The towing cable 2 is arranged inside the double-loop load-bearing mechanism 1. That is to say, whether it is the closed-loop track formed by the load-bearing track 10 or the closed-loop structure formed by the load-bearing cable 100 and the necessary detour track 110, the towing cable 2 is arranged inside the enclosed space of the load-bearing mechanism 1, which can maintain the spatial isolation of the load-bearing and towing effects. Of course, in this application, it is not limited to this. By arranging the towing cable 2 outside the enclosed space of the load-bearing mechanism 1, the corresponding technical effects can also be achieved, which will not be elaborated here.

[0073] Based on the towing cable 2 being arranged inside the enclosed space of the load-bearing mechanism 1, the walking wheels 44 and the rope fixing device 7 are respectively arranged on the upper and lower sides of the transport shelving 4a. Specifically, the upper and lower sides are defined based on the support surface of the transport shelving 4a, so that the walking wheels 44 and the rope fixing device 7 can respectively form a rolling and connecting relationship with the load-bearing track 10 / load-bearing cable 100 and the towing cable 2.

[0074] In this application, different sections of the two enclosed towing cables 2 form an upward towing cable 21 and a downward towing cable 22. During the operation of the transport shelving 4a on the upward towing cable 21, the shelving strip 42 can effectively support the conveyor belt 8 upward. During the operation of the downward towing cable 22, it is necessary to consider preventing the conveyor belt 8 from sagging and detaching from the transport shelving 4a.

[0075] Specifically, pressure plates 46 are connected to both ends of each row of shelving strips 42. The edge part of the base belt 81 of the conveyor belt 8 is clamped between the pressure plate 46 and the shelving strip 42. The pressure plate 46 is fixedly connected to the shelving strip 42 through bolts. Through this setting method, the effective connection between the transport shelving 4a and the conveyor belt 8 can be ensured. The clamping and fixing of the corrugated side belt 8a and the edge of the base belt 81 by the pressure plate 46 can ensure the reliable and stable connection relationship between the transport shelving 4a and the conveyor belt 8 during the operation of both the upward towing cable 21 and the downward towing cable 22.

[0076] It should be noted that in order to ensure the connection effectiveness of clamping and fixing, it is emphasized here that there should be enough clamping space between the corrugated edge belt 8a and the edge of the base belt 81.

[0077] The carrier rack 4a in this application includes different forms of structures. Specifically, the basic components of the rack strip 42, the rope connection rack 41, the rope fixing device 7, the wheel set fixing rack 45, and the walking wheel 44 are the same. The difference lies in the assembly mechanism 43 that can enable the rack strip 42 to flexibly and rigidly bend and transform.

[0078] In one specific setting form, a clamping block 40a is provided between adjacent rack strips 42. The width of the clamping block 40a is the same as the gap between the rack strips 42. In this form, due to the setting of the clamping block 40a, the excessive bending of the rack strip 42 after reaching the support plate state can be restricted.

[0079] Specifically, when the carrier rack 4a is in a flat state, the rack strip 42 and the clamping block 40a are in mutual contact, forming an integral plane; when receiving bulk materials, due to the mutual extrusion between the rack strip 42 and the clamping block 40a, the rigidity of the plane is enhanced. When the structure changes direction through the drive wheel 3 or the steering wheel 32, the assembly mechanism 43 drives the carrier rack 4a to bend, and the rack strip 42 and the clamping block 40a are naturally separated, forming a flexible form to achieve a smooth transition.

[0080] Based on the above description, the clamping block 40a and the rack strip 42 are connected into an integral structure through the assembly mechanism 43. The assembly mechanism 43 includes a flexible guiding chain 40b arranged below the rack strip 42.

[0081] The flexible guiding chain 40b includes a plurality of inner and outer staggered articulated chain links 40c. Each chain link 40c is respectively arranged corresponding to the clamping block 40a and the rack strip 42, and is connected to the bottoms of the clamping block 40a and the rack strip 42 through a fixing plate 47.

[0082] More specifically, the chain links 40c are divided into two categories. One category is the outer chain links 40c, which are the two pieces on the outside of the flexible guiding chain 40b, and the other category is the inner chain links 40c, which are the two pieces on the inside of the flexible guiding chain 40b. The two inner chain links 40c are connected together through a sleeve. There are hole grooves between the inner / outer chain links 40c and the sleeve, and a complete chain link 40c is formed through a pin shaft. One side of the outer chain link 40c is connected with a fixing plate 47, and the fixing plate 47 is provided with a threaded hole and is fixed to the clamping block 40a through the threaded hole. One side of the inner chain link 40c is also connected with a fixing plate 47, and the fixing plate 47 is provided with a threaded hole and is fixed to the rack strip 42 through the threaded hole.

[0083] In another specific setting form, a gap is left between adjacent row bars 42 of the carrier row frame 4a, and the assembling mechanism 43 includes a guiding rigid chain 400a arranged below the row bar 42.

[0084] The guiding rigid chain 400a is a one-way bending structure that can only bend away from the row bar 42, and includes a plurality of chain plates 400b that are articulated and connected alternately inside and outside. The chain plate 400b includes an outer chain plate 400b and an inner chain plate 400b that are sleeved. Each of the outer chain plates 400b is respectively arranged corresponding to the row bar 42 and is connected to the bottom of the row bar 42 through a fixing plate 47.

[0085] More specifically, the guiding rigid chain 400a can only bend in the direction away from the row bar 42 and cannot bend in the direction towards the row bar 42 due to the action of the stopper formed by the chain plates 400b. When receiving bulk materials, due to the action of the stopper in the guiding rigid chain 400a, the planar rigidity of the running row frame is enhanced. When the structure is redirected by the driving wheel 3 / steering wheel 32, the guiding rigid chain 400a drives the carrier row frame 4a to bend in the direction away from the running row frame, forming a flexible shape to achieve a smooth transition.

[0086] The guiding rigid chain 400a includes two groups of symmetrically arranged chain plate groups 400b, and the chain plate group 400b includes two rows of inner / outer chain plates 400b. The two rows of inner / outer chain plates 400b are respectively abutted together. Two pin holes are opened at the top of the surface of each chain plate 400b, one pin hole is opened in the middle of the bottom surface of the chain plate 400b, and two semi-circular pin holes are opened at the edge. The inner row and the outer row of chain plates 400b are arranged alternately, so that the pin hole in the middle of the bottom surface of the outer row chain plate 400b corresponds to the pin hole at the edge of the bottom surface of the inner row chain plate 400b, forming a state where the guiding rigid chain 400a can only bend in the direction away from the carrier row frame 4a.

[0087] The double-wheel drive mechanism in the present invention includes a horizontally arranged transmission shaft 31, and two driving wheels 3 are vertically connected to the transmission shaft 31 and are arranged at intervals relative to the axial direction of the transmission shaft 31. The interval space between the two driving wheels 3 constitutes the traction moving space of the carrier mechanism 4 and the flipping and steering space at the position of the driving wheel 3.

[0088] In another specific implementation form, the two driving wheels 3 can also be independently driven respectively, and the two driving wheels 3 are arranged in mirror symmetry, and the above technical effects can also be achieved.

[0089] From the perspective of constructing the driving and traction surface described above, the two traction cables 2 are respectively wound around the corresponding driving wheels 3, and are used to drive the traction cable 2 to run by the driving wheel 3 through the friction force between the wound and contacted traction cable 2 and the driving wheel 3.

[0090] The end of the transmission shaft 31 is connected to the motor-generator mechanism 5. The motor-generator mechanism 5 specifically includes a motor-generator, which has both driving and discharging functions. During the energy storage stage, it can drive the driving wheel 3 to rotate actively through the driving function, and at the same time form a continuous gravity flow by lifting the energy storage bulk material at the bottom of the energy storage system through the traction cable 2, the carrying rack 4a, and the conveyor belt 8.

[0091] And during the discharging stage, it can lower and carry the energy storage bulk material at the top of the energy storage system through the carrying rack 4a and the conveyor belt 8, drive the traction cable 2 to run through the carrying rack 4a, further make the driving wheel 3 rotate passively, and then make the motor-generator rotate, so that the gravity flow is converted into an energy flow in the form of electric energy through the discharging function in the form of energy conversion.

[0092] See Figure 8 , the driving wheel 3 includes two active driving wheels 3 connected by a horizontal transmission shaft 31, or two separately driven active driving wheels 3. The motor-generator includes an output shaft, and the output shaft is connected to the horizontal transmission shaft 31 through a coupling.

[0093] In this application, the specific form of the motor-generator mechanism 5 is not limited. In addition to the motor-generator connected to the transmission shaft 31 described above, one of the driving wheels 3 can also be connected to a motor, and the other driving wheel 3 can be connected to a generator. By controlling the engagement and disengagement of different driving wheels 3 with the motor or the generator during the energy storage and discharging stages, on the premise that the two driving wheels 3 maintain a transmission connection, the motor and the generator can perform different functions.

[0094] It should be noted that the synchronous operation of the two independent driving wheels 3 can also be maintained in the form of mechanical or electrical control, which will not be elaborated here.

[0095] Each of the two traction cables 2 includes a single closed-loop annular traction cable 2, and a section of the annular traction cable 2 surrounds and passes through the driving wheel 3.

[0096] From the perspective of the parallel arrangement of the traction cables 2, each of the two traction cables 2 includes a single closed-loop annular traction cable 2. The annular traction cable 2 surrounds and passes through the driving wheel 3, and different sections of the annular traction cable 2 corresponding to the bearing mechanism 1 are in the same plane, forming a closed-loop plane of the traction cable 2, and ensuring that the bearing surface formed by the bearing mechanism 1 and the driving and traction surface are in the same plane.

[0097] Preferably, the annular traction cable 2 is vertically arranged in the same plane. Combining its surrounding at the driving wheel 3 part, it can maintain a relatively stable driving and traction surface parallel to the bearing closed-loop plane.

[0098] The dual-wheel drive mechanism is arranged at the top of the energy storage system, that is, the dual-wheel drive mechanism is installed on a high-lying terrain platform. Through this setting method, the traction load can be directly output and transmitted to the traction cable 2 and the carrying rack 4a by the dual-wheel drive mechanism, reducing the load of the energy storage system during the energy storage process, reducing the overall stress load of the traction cable 2. Compared with the traditional form of setting the drive mechanism at the bottom, it can reduce the ineffective load during bottom traction and improve the conversion rate during the energy storage process.

[0099] The dual-wheel drive mechanism is installed through a drive installation mechanism. The drive installation mechanism includes relatively erected drive supports 6 and an energy storage device mounting base. The transmission shaft 31 and the drive wheels 3 are installed between the drive supports 6, and the motor-generator is installed on the energy storage device mounting base (not shown in the figure).

[0100] In the energy storage system of the present invention, in addition to the drive system at the top, in order to maintain the cyclic stability of bearing and traction, it is also necessary to consider setting up necessary steering mechanisms.

[0101] A detour wheel set is arranged at the bottom of the energy storage system. The detour wheel set is mainly used to cooperate with the bearing mechanism 1, the carrying mechanism 4, the traction mechanism, and the bulk material conveying mechanism for turning at the bottom. Preferably, in order to maintain the stability and integrity of the running bearing surface and the drive and traction surface, the detour wheel set also includes two vertically installed steering wheels 32 arranged in parallel. The structure of the steering wheels 32 is the same as that of the drive wheels 3, and the wheel surfaces of the steering wheels 32 and the drive wheels 3 are arranged in the same plane. Preferably, the wheel surfaces of the steering wheels 32 and the drive wheels 3 are arranged in the same vertical plane.

[0102] It should be noted that in addition to adopting the top-up drive form with the highest economy, the bottom-down drive form can also be adopted, that is, the dual-wheel drive mechanism is arranged at the bottom of the energy storage system and the detour wheel set is arranged at the top of the energy storage system; or the top-bottom simultaneous up-drive and down-drive form, that is, the dual-wheel drive mechanism is arranged at both the top and the bottom of the energy storage system, which can meet the operation requirements and can be specifically set according to the actual situation.

[0103] From the perspective of connection and installation, the connection and installation structures of the two steering wheels 32 and the drive wheels 3 are the same. They are installed through the set steering supports and are coaxially connected through the necessary transmission shaft 31 to ensure that the two steering wheels 32 maintain a relatively synchronous rotation relationship.

[0104] Each traction cable 2 is closed and wound between the corresponding drive wheels 3 and steering wheels 32 in a group to form the drive and traction surface corresponding to each traction cable 2.

[0105] In order to maintain a stable and reliable fit of the traction cable 2 on the drive wheel 3 and the steering wheel 32, wheel grooves 33 are respectively provided on the wheel surfaces of the drive wheel 3 and the steering wheel 32. Preferably, the positions of the wheel grooves 33 on the drive wheel 3 and the steering wheel 32 are the same and correspond to each other vertically.

[0106] The traction cable 2 is tightly wound around the wheel groove 33. The wheel groove 33 specifically plays a role in limiting and fitting, keeping the plane where the traction cable 2 is located parallel to the bearing surface.

[0107] During operation, the traction cable 2 specifically moves in a circular motion under the action of the frictional force in the state where it is pressed against the drive wheel 3 and the steering wheel 32. In order to enhance the frictional force, ensure synchronous operation and prevent slipping, necessary anti-slip structures are provided in the wheel groove 33 to ensure the continuous and stable circular motion of the traction cable 2.

[0108] Regarding the assembly mechanism 43 on the transport rack 4a, in order to be able to form reliable deformation at the turning parts on both the top and bottom sides of the transport rack 4a, it is necessary to provide necessary support and guidance for the transport rack 4a. Therefore, guide sprockets 34 are respectively arranged in pairs between the drive wheels 3 and between the steering wheels 32. The guide sprockets 34 are coaxially connected to the drive wheel 3 or the steering wheel 32, and can maintain the synchronous rotation of the guide sprockets 34 with the drive wheel 3 or the steering wheel 32. Further, the guide sprockets 34 are meshed and connected with the assembly mechanism 43, which can not only enhance the driving ability of the system, but also effectively support the conveyor belt 8 synchronously.

[0109] The specific composition angle of the traction cable 2. The upward traction cable 21 specifically includes a steering wheel section 211, a lower horizontal section 212, an upper inclined section 213, and an upper horizontal section 214. At the junctions of the upper inclined section 213 with the upper horizontal section 214 and the lower horizontal section 212, a traction cable guiding device 23 composed of multiple guide wheel groups is arranged to facilitate the smooth transition of each section.

[0110] The downward traction cable 22 can be directly composed of a drive wheel section 221 and a lower inclined section 223. The traction cable 2 is directly connected to the steering wheel section 211 after transitioning through 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 at the turning part of the conveyor belt 8 on the drive wheel 3 is enlarged, resulting in a relatively high position of the track column or the upper branch of the conveyor belt 8. Therefore, it is necessary to consider setting necessary structures to reduce the distance between the upper inclined section 213 and the lower inclined section 223.

[0111] Based on this, the downward traction cable 22 in the present invention includes a driving wheel section 221, an upper arc redirecting section 222, a lower inclined section 223, and a lower arc redirecting section 224. The upper arc redirecting section 222 is a section where the driving wheel section 221 bends and rises in an arc shape towards the upper inclined section 213 and the upper horizontal section 214 of the upward traction cable 21 after turning; the lower arc redirecting section 224 is a section where the lower inclined section 223 bends and rises in an arc shape towards the upper inclined section 213 and the lower horizontal section 212 of the upward traction cable 21 when approaching the turning wheel section 211.

[0112] The settings of the upper arc redirecting section 222 and the lower arc redirecting section 224 are mainly to narrow the distance between the upper inclined section 213 and the lower inclined section 223, which is specifically regulated by a plurality of traction cable guiding devices 23 on both the top and bottom sides of the lower inclined section 223.

[0113] On the one hand, it can raise the lower inclined section 223 of the downward traction cable 22, reduce the height of the track columns or the upper branch position of the conveyor belt 8, increase the overall stability and reduce the investment. On the other hand, it can increase the contact angle / contact area between the traction cable 2 and the driving wheel 3 / turning wheel 32, improve the traction force, and thus improve the transportation volume and charging / discharging power of the system.

[0114] The description of the structure of the traction cable 2 is mainly to introduce the specific structure of the bearing mechanism 1. From different setting forms of the bearing mechanism 1, refer to Figure 1 the structure of the load-bearing track type bulk material conveying gravity flow energy storage system. The double-loop bearing mechanism 1 includes two parallel upwardly inclined closed-loop load-bearing tracks 10. Based on the structural form of the closed-loop of the load-bearing tracks 10, the closed-loop of the traction cable 2, and the parallel setting of the driving wheels 3, the closed-loop plane of the load-bearing tracks 10, the closed-loop plane of the traction cable 2, and the wheel surface of the driving wheels 3 are parallel to each other, which can form the coincidence of the driving traction surface of the traction cable 2 and the surrounding surface of the traction cable 2 on the driving wheels 3, and at the same time constitute a stable and reliable running load-bearing surface and traction surface, maximizing the risk of deviation of the carrying mechanism 4 and ensuring the running stability.

[0115] The two load-bearing tracks 10 include U-shaped steel channels with their opening directions facing each other, and the U-shaped steel channels can effectively cooperate with the running wheels 44.

[0116] The running wheels 44 are accommodated in the U-shaped steel channels and can roll along the U-shaped steel channels, so that the carrying rack 4a can run in a closed loop along the load-bearing tracks 10.

[0117] From the perspective of the parallel setting of the load-bearing tracks 10, the two load-bearing tracks 10 are mirror-symmetrical with respect to the traction cable 2, and the load-bearing tracks 10 include an upper branch track 10a and a lower branch track 10b.

[0118] The upper branch track 10a includes an upward arc turning section 10a1, an upward bottom horizontal section 10a2, an upward inclined section 10a3, and an upward top horizontal section 10a4; The lower branch track 10b includes a downward arc turning section 10b1, a downward top guiding section 10b2, a downward inclined section 10b3, and a downward bottom guiding section 10b4. The load-bearing tracks 10 in the above different sections form a closed-loop structure.

[0119] It should be noted that in this application, the line directions of the load-bearing track 10 and the traction cable 2 are the same, and a circular track is formed by connecting the head and tail. The load-bearing track 10 is fixed to the ground through multiple columns. The inner cavity of the U-shaped steel channel of the load-bearing track 10 is used to install the running wheels 44 for the transport rack 4a to run along the closed loop of the load-bearing track 10.

[0120] Based on the same layout route of the load-bearing track 10 and the traction cable 2, the different sections of the upper branch track 10a correspond to the turning wheel section 211, the lower horizontal section 212, the upper inclined section 213, and the upper horizontal section 214 included in the upward traction cable 21 in sequence, and the different sections of the lower branch track 10b correspond to the driving wheel section 221, the upper arc redirecting section 222, the lower inclined section 223, and the lower arc redirecting section 224 included in the downward traction cable 22 in sequence.

[0121] From the perspective of the installation location, the upward arc turning section 10a1 is arranged around the turning wheel 32, the downward arc turning section 10b1 is arranged around the driving wheel 3, and the downward top guiding section 10b2 and the downward bottom guiding section 10b4 both bend and extend towards the upper branch track 10a to cooperate with the upper arc redirecting section 222 and the lower arc redirecting section 224 of the downward traction cable 22, reducing the height of the track columns, increasing the overall stability and reducing the investment.

[0122] The different sections corresponding to the load-bearing track 10 of the circular traction cable 2 are in the same plane, forming the surrounding plane of the traction cable 2.

[0123] From the perspective of another specific structure of the bearing mechanism 1, combined with Figure 2 the structure of the load-bearing cable type bulk material conveying gravity flow energy storage system, the double-loop bearing mechanism 1 includes two pairs of parallel upwardly inclined load-bearing cables 100, and the load-bearing cables 100 are used for the running wheels 44 of the transport rack 4a to roll, so that the load-bearing cables 100 can fully exert the bearing effect.

[0124] In order to ensure that the traveling wheels 44 can be effectively steered at the positions of the driving wheels 3 and the steering wheels 32, the double-loop load-bearing mechanism 1 of the load-bearing cable type further includes detour tracks 110 located on both the top and bottom sides. The structure of the detour tracks 110 is the same as that of the non-linear section of the above-mentioned load-bearing track 10, and can allow the traveling wheels 44 to roll in the inner cavity of the U-shaped steel groove of the detour tracks 110, thereby achieving steering.

[0125] The load-bearing cable 100 specifically includes an upper branch load-bearing cable 100a and a lower branch load-bearing cable 100b that are respectively arranged in pairs. A rope groove for limiting and cooperating with the load-bearing cable 100 is provided on the outer side wall of the traveling wheel 44. The detour track 110 is used for the traveling wheel 44 to turn and connect between the upper branch load-bearing cable 100a and the lower branch load-bearing cable 100b, ensuring the smooth and stable steering of the traveling wheel 44.

[0126] The detour track 110 includes an upper branch detour track 110a and a lower branch detour track 110b. The upper branch load-bearing cable 100a and the lower branch load-bearing cable 100b are respectively connected end to end with the upper branch detour track 110a and the lower branch detour track 110b to form a closed-loop structure.

[0127] Starting from different stages of energy storage and discharge, the bulk material conveying gravity flow energy storage system further includes a stacking yard for storing energy storage bulk materials. The stacking yard is arranged at the top and bottom of the energy storage system, and the energy storage bulk materials are reciprocally transported between the stacking yard and the bulk material conveying mechanism through a transfer device.

[0128] Through the bulk material conveying gravity flow energy storage system in the present invention, a continuous and steady gravity flow and energy flow can be constructed. On the premise of improving the carrying capacity, the high-efficiency operation of the energy storage and power generation states can be ensured, and the large-power storage / discharge of electric energy can be realized.

[0129] The present invention also provides a bulk material conveying gravity flow energy storage method, which is carried out through the bulk material conveying gravity flow energy storage system described in the foregoing embodiments, and specifically includes an energy storage stage and a discharge stage.

[0130] In the energy storage stage, the energy storage bulk materials located in the stacking yard at the bottom of the energy storage system are continuously transported from bottom to top through the bulk material conveying gravity flow energy storage system, and a continuous gravity flow is formed by the lifting of the energy storage bulk materials. During the energy storage and power storage process, the electric power generation mechanism 5 converts electric energy into kinetic energy, and the kinetic energy is smoothly transmitted to the driving wheel 3 to drive it to rotate in the clockwise direction.

[0131] The driving wheel 3 drives the traction cable 2 to start running around through the friction between its surface and the traction cable 2. At the same time, in combination with the cooperation between the traction cable 2 and the steering wheel 32, the steering wheel 32 is driven to rotate in the clockwise direction.

[0132] With the continuous movement of the towing cable 2, the carrier mechanism 4 clamped thereon is towed to continuously move along the preset bearing mechanism 1. The carrier mechanism 4 drives the conveyor belt 8 and the energy storage bulk materials dumped into the multi-compartment space of the conveyor belt 8 by the transfer equipment to move upward. When approaching the top stacking yard, the energy storage bulk materials are automatically overturned and discharged, quickly transported away by the transfer equipment for storage and sent to the top stacking yard, while the carrier mechanism 4 and the conveyor belt 8 enter an arc track. Subsequently, the carrier mechanism 4 drives the conveyor belt 8 to continuously travel along the circular track and finally returns to the horizontal track again, ready to start a new round of energy storage bulk material transportation tasks.

[0133] In the discharging stage, the energy storage bulk materials located in the top stacking yard of the energy storage system are continuously carried from top to bottom by the bulk material conveying gravity flow energy storage system, and a continuous energy flow is formed through the fall of the energy storage bulk materials. During the discharging process, the energy storage bulk materials located in the top stacking yard are transferred by the transfer equipment to the multi-compartment space on the conveyor belt 8.

[0134] Under the action of gravity, the energy storage bulk materials drive the conveyor belt 8 and the carrier mechanism 4 to slide downward along the bearing mechanism 1 together, releasing the contained energy. The carrier mechanism 4 drives the towing cable 2 to start moving through its connection with the conveyor belt 8 and the towing cable 2.

[0135] The towing cable 2 transfers the movement to the driving wheel 3 and the steering wheel 32 through its friction with the wheel groove 33, driving them to rotate counterclockwise. The rotation of the driving wheel 3 is then transferred to the electric power generation mechanism 5. The electric power generation mechanism 5 enters the power generation mode, converts kinetic energy into electric energy, and inputs it into the power grid.

[0136] When approaching the bottom stacking yard, the energy storage bulk materials are automatically overturned and discharged, quickly transported away by the transfer equipment for storage and sent to the bottom stacking yard. The carrier mechanism 4 continues to drive the conveyor belt 8 to continuously travel along the circular track. Finally, the carrier mechanism 4 drives the conveyor belt 8 back to the horizontal track, ready to start a new round of energy storage bulk material transportation tasks.

[0137] During operation, the traveling speed of the conveyor belt 8 following the carrier mechanism 4 and the carrying capacity of the energy storage bulk materials are adjustable, so as to realize the adjustability of the 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.

[0138] At the same time, the bulk material conveying gravity flow energy storage system can also be designed and manufactured economically and reliably in a modular manner, and arranged in parallel multi-pieces and / or stacked up and down according to the mountain slope terrain to achieve larger-scale energy storage.

[0139] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0140] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A gravity flow energy storage system for bulk material transportation, characterized in that, It includes a double-loop bearing mechanism, a double-loop traction mechanism, a two-wheel drive mechanism, a carrying mechanism, and a bulk material conveying mechanism; The double-loop traction mechanism includes two closed-loop and upward-inclined traction cables arranged in parallel. The two-wheel drive mechanism includes two vertically installed drive wheels arranged in parallel. At least a part of the traction cable is wound around the drive wheels and continuously runs under the drive of the drive wheels; The bulk material conveying mechanism includes a closed-loop conveying belt for carrying bulk energy storage materials as energy storage carriers; A plurality of carrying mechanisms capable of running synchronously with the traction cables are connected between the two traction cables, and the carrying mechanisms can run in a closed loop along the double-loop bearing mechanism; The carrying mechanism is connected to the conveying belt so that the carrying mechanism can drive the conveying belt to continuously run under the traction of the traction cable and the support of the double-loop bearing mechanism; The drive wheels are connected with an electric power generating mechanism; The electric power generating mechanism is used to drive the drive wheels to rotate actively, and a continuous gravity flow is formed by continuously lifting the bulk energy storage materials; Moreover, the drive wheels are driven to rotate by continuously descending bulk energy storage materials, so as to convert gravitational potential energy into electric energy of the electric power generating mechanism to form a continuous energy flow.

2. The gravity flow energy storage system for bulk material transportation according to claim 1, wherein Each carrying mechanism includes a carrying rack connected between the conveying belt and the traction cable. The carrying rack includes cable connection racks on both sides of the traveling direction. Both ends of the cable connection racks are provided with cable fixing devices. The cable fixing devices are pivotally connected to both ends of the cable connection racks through rotary bearings, and the cable fixing devices are fixedly connected to the traction cables.

3. The gravity flow energy storage system for bulk material transportation according to claim 2, wherein The carrying rack further includes multiple rows of rack strips arranged side by side between the cable connection racks, and the multiple rows of rack strips are connected by an assembling mechanism located below them; The multiple rows of rack strips are arranged at intervals along the traveling direction of the carrying mechanism. Walking wheels are connected to the rack strips on both sides of the traveling direction, and the walking wheels can roll along the double-loop bearing mechanism; Both ends of the rack strips are connected with wheel group fixing frames. The inner ring of the walking wheel is installed on the wheel group fixing frame through a wheel shaft, and the outer ring of the walking wheel rolls on the double-loop bearing mechanism.

4. The gravity flow energy storage system for bulk material transportation according to claim 3, characterized in that, The double-loop bearing mechanism includes a closed-loop structure, and the traction cables are arranged inside the double-loop bearing mechanism; The walking wheels and the cable fixing devices are respectively arranged on the upper and lower sides of the carrying rack. A pressing plate is connected to both ends of each row of rack strips. The edge part of the conveying belt is clamped between the pressing plate and the rack strip, and the pressing plate is fixedly connected to the rack strip through bolts.

5. The bulk material conveying gravity flow energy storage system according to claim 4, characterized in that, Clamping blocks are arranged between adjacent rack strips, and the width of the clamping blocks is the same as the gap between the rack strips; The clamping blocks and the rack strips are connected into an integral structure through the assembling mechanism, and the assembling mechanism includes a guiding chain arranged below the rack strips; The guiding chain comprises a plurality of chain links which are articulated and connected in an alternating inside-outside manner. Each of the chain links is respectively arranged corresponding to the clamping block and the shelf strip board, and is connected to the bottoms of the clamping block and the shelf strip board through a fixing plate.

6. The gravity flow energy storage system for bulk material transportation according to claim 4, wherein A gap is left between adjacent shelf strip boards. The assembling mechanism comprises a guiding rigid chain arranged under the shelf strip boards. The guiding rigid chain is a unidirectional bending structure that can only bend away from the shelf strip boards, and comprises a plurality of chain plates which are articulated and connected in an alternating inside-outside manner. The chain plates comprise outer chain plates and inner chain plates which are sleeved. Each of the outer chain plates is respectively arranged corresponding to the shelf strip boards, and is connected to the bottoms of the shelf strip boards through a fixing plate.

7. The gravity flow energy storage system for bulk material transportation according to claim 3, characterized in that, The double-wheel driving mechanism comprises a horizontally arranged transmission shaft. Two driving wheels are vertically connected to the transmission shaft and are arranged at intervals along the axial direction of the transmission shaft. Or, the two driving wheels are respectively independently driven, and the two driving wheels are arranged in a mirror-symmetrical manner. Two traction cables are respectively wound around the corresponding driving wheels, and are used for driving the traction cables to run by the driving wheels through the frictional force of circumferential contact. The end of the transmission shaft is connected to the electric power generation mechanism. The electric power generation mechanism comprises an electric generator. The electric generator comprises an output shaft, and the output shaft is connected to the transmission shaft through a coupling. Two traction cables respectively comprise single-loop closed-ring annular traction cables, and a section of each annular traction cable is wound around the driving wheel.

8. The bulk material conveying gravity flow energy storage system according to claim 7, wherein The double-wheel driving mechanism is arranged on the top of the energy storage system. A detour wheel set is arranged at the bottom of the energy storage system. The detour wheel set comprises two vertically installed steering wheels arranged in parallel. The steering wheels have the same structure as the driving wheels, and the wheel surfaces of the steering wheels and the driving wheels are arranged in the same plane. Each traction cable is closed and wound between the corresponding driving wheel and the steering wheel in a group. Grooves are respectively arranged on the wheel surfaces of the driving wheel and the steering wheel, and the traction cable is tightly wound in the grooves. Or, the double-wheel driving mechanism is arranged at the bottom of the energy storage system, and the detour wheel set is arranged on the top of the energy storage system. Or, double-wheel driving mechanisms are arranged both on the top and at the bottom of the energy storage system.

9. The gravity flow energy storage system for bulk material transportation according to claim 8, wherein Guide sprockets are respectively arranged in pairs between the driving wheels and between the steering wheels. The guide sprockets are coaxially connected to the driving wheels or the steering wheels and are meshed with the assembling mechanism.

10. The gravity flow energy storage system for bulk material transportation according to claim 8, characterized in that, The double-loop bearing mechanism comprises two parallel upward-inclined closed-loop bearing tracks. The two bearing tracks comprise U-shaped steel channels with opposite opening directions. The running wheels are accommodated in the U-shaped steel channels and can roll along the U-shaped steel channels. The bearing track comprises an upper branch track and a lower branch track. The upper branch track comprises an upward-arc turning section, an upward bottom horizontal section, an upward inclined section and an upward top horizontal section. The lower branch track includes a downward arc turning section, a downward top guiding section, a downward inclined section, and a downward bottom guiding section. The upward arc turning section is arranged on the periphery of the steering wheel, and the downward arc turning section is arranged on the periphery of the driving wheel. The downward top guiding section extends curvedly towards the upper branch track; The annular traction cable and different sections corresponding to the bearing track are in the same plane, forming the surrounding plane of the traction cable.

11. The gravity flow energy storage system for bulk material transportation according to claim 3, characterized in that, The double-loop bearing mechanism includes two pairs of parallel upwardly inclined bearing cables and bypass tracks located on both the top and bottom sides; The bearing cable includes an upper branch bearing cable and a lower branch bearing cable which are respectively arranged in pairs. A rope groove for limiting and cooperating with the bearing cable is arranged on the outer side wall of the walking wheel. The bypass track is used for the walking wheel to turn and connect between the upper branch bearing cable and the lower branch bearing cable; The bypass track includes an upper branch bypass track and a lower branch bypass track. The upper branch bearing cable and the lower branch bearing cable are respectively connected end to end with the upper branch bypass track and the lower branch bypass track to form a closed-loop structure.

12. The gravity flow energy storage system for bulk material transportation according to claim 3, characterized in that, It further includes a stacking yard for storing the energy storage bulk materials. The stacking yard is arranged at the top and bottom of the energy storage system. The energy storage bulk materials are reciprocally transported between the stacking yard and the bulk material conveying mechanism through a transfer device.

13. A method for energy storage by gravity flow of bulk material transportation, which is carried out by the bulk material transportation gravity flow energy storage system described in claim 1, characterized in that, It includes an energy storage stage and a discharging stage: In the energy storage stage, the energy storage bulk materials located in the stacking yard at the bottom of the energy storage system are continuously conveyed from bottom to top through the bulk material conveying gravity flow energy storage system, and a continuous gravity flow is formed by the lifting of the energy storage bulk materials; In the discharging stage, the energy storage bulk materials located in the stacking yard at the top of the energy storage system are continuously conveyed from top to bottom through the bulk material conveying gravity flow energy storage system, and a continuous energy flow is formed by the falling of the energy storage bulk materials.

14. The gravity flow energy storage method for bulk material transportation according to claim 13, characterized in that, The conveying belt is adjustable according to the traveling speed of the carrying mechanism and the carrying amount of the energy storage bulk materials, so as to realize the adjustability of the gravity flow.

15. The gravity flow energy storage method for bulk material transportation according to claim 13, wherein The bulk material conveying gravity flow energy storage system includes multiple sets. Multiple sets of the bulk material conveying gravity flow energy storage systems are arranged side by side in multiple rows and / or stacked up and down on the hillside terrain.

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