Dual drive bulk material conveying system and its gravity flow energy storage system and method

Abstract

The application discloses a double-driven bulk material conveying system and a gravity flow energy storage system and method thereof, and relates to the technical field of conveying equipment. The double-driven bulk material conveying system comprises a bearing structure, a traction structure, a conveying structure, a driving device, a first turning structure, a second turning structure and a stockyard; the bearing structure comprises a bearing ring body for bearing a carrier vehicle; the first turning structure and the second turning structure comprise a winding drum and a turning wheel; the driving device drives a traction rope of the traction structure and a conveying belt of the conveying structure to rotate synchronously in a first direction, and then drives the carrier vehicle of the conveying structure to move synchronously with the bearing structure and the conveying belt. The double-driven bulk material conveying gravity flow energy storage system comprises the double-driven bulk material conveying system. The energy storage method is suitable for the double-driven bulk material conveying gravity flow energy storage system. The double-driven bulk material conveying system and the gravity flow energy storage system and method thereof are provided to solve the technical problems of excessive running resistance and low carrying efficiency in the conveying process of bulk materials in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveying equipment, in particular to a double-drive bulk material conveying system and a gravity flow energy storage system and energy storage method thereof. BACKGROUND

[0002] In recent years, new energy development has made remarkable achievements; however, the problems of new energy grid fluctuation and poor grid stability are increasingly prominent. New energy storage as a means of regulating power supply and demand can effectively solve the above problems of new energy. Among new energy storage, gravity energy storage is more suitable for large-scale grid energy storage and medium and long-term energy storage scenarios due to its storage time, no attenuation, long service life, high safety, low maintenance cost and other advantages. In particular, in areas where wind energy and light energy resources are abundant but power output is unstable, gravity energy storage systems can effectively regulate power load, achieve energy balance and transfer, and improve renewable energy consumption capacity. Gravity energy storage systems rely on the lifting of a large number of heavy objects to achieve potential energy conversion, and most of them have intermittent charging / discharging problems.

[0003] Therefore, the mechanism of bulk material transportation is applied to the field of gravity energy storage to realize a continuous charging / discharging bulk material conveying gravity energy storage system. However, the existing bulk material conveying gravity energy storage system conveys bulk material by belt traction, and the belt and the carrier roller generate indentation resistance, and the material on the belt generates extrusion resistance when passing through the carrier roller, causing the problem of excessive running resistance and low carrying efficiency. At the same time, the belt bears a large tensile stress in the direction of travel, which is prone to longitudinal tearing, belt breakage and other faults, and is difficult to engineer under the efficiency requirements of gravity energy storage. SUMMARY

[0004] The purpose of the present application is to provide a double-drive bulk material conveying system and a gravity flow energy storage system and energy storage method thereof to solve the technical problems of excessive running resistance and low carrying efficiency in the process of conveying bulk material to some extent.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A double-drive bulk material conveying system, comprising a bearing structure, a traction structure, a conveying structure, a driving device, a first turning structure, a second turning structure and a stockyard for storing bulk material;

[0007] The conveying structure comprises a conveying belt in the form of a ring and a plurality of carrying vehicles; along the extension direction of the conveying belt, a plurality of the carrying vehicles are sequentially fixedly connected to the conveying belt;

[0008] The bearing structure comprises a bearing ring body bearing all the carrying vehicles; the bearing ring body is in the form of a ring structure;

[0009] The traction structure comprises a traction cable for pulling all the carrier vehicles; the traction cable is in a loop shape;

[0010] The first and second turning structures are both turning structures, which comprise a winding drum and a turning wheel; the conveyor belt circulates between the winding drums of the first and second turning structures, and the traction cable circulates between the turning wheels of the first and second turning structures;

[0011] The driving device is connected to the first and / or second turning structures to drive the traction cable and the conveyor belt to rotate in the same direction, thereby driving the carrier vehicles to move along the load loop body in synchronization with the conveyor belt.

[0012] Optionally, the load loop body comprises two load tracks and two load cables, the two load cables are arranged in parallel, and the two load tracks are connected to the two ends of the two load cables respectively to form a loop structure; or the load loop body comprises a load track in a loop structure.

[0013] The load loop bodies are arranged in pairs, and the conveyor belt is located between the pair of load loop bodies;

[0014] The traction cables are arranged in pairs, and the conveyor belt is located between the pair of traction cables;

[0015] The carrier vehicle comprises a load beam, a walking wheel and a rope connecting device; the load beam is fixedly connected to the conveyor belt.

[0016] At least one pair of walking wheels are pivotally connected to the two sides of the load beam, and the walking wheels are configured to walk on the load loop body; optionally, the number of the walking wheels is consistent with the number of the load loop bodies.

[0017] At least one pair of rope connecting devices are rotatably connected to the two sides of the load beam; the rope connecting device is fixedly connected to the traction cable, and the rotation axis of the rope connecting device has an included angle with the extension direction of the traction cable.

[0018] Optionally, the rope connecting device comprises a rope connecting body and a gripper; the gripper is fixedly connected to the end of the rope connecting body, and the jaw of the gripper faces the center line of the traction cable; the gripper is fixedly connected to the traction cable; a load bearing is connected between the rope connecting body and the load beam. Optionally, the walking wheel is a roller bearing.

[0019] Optionally, when the load loop body comprises a load cable, the walking wheel has a walking wheel groove matched with the load cable.

[0020] The bearing rail has a wheel groove matched with the walking wheel; the bearing rail has a corresponding groove bottom and groove top in the radial direction of the walking wheel, the groove bottom and the groove top form the wheel groove, the wheel groove extends in the extension direction of the bearing rail, and the walking wheel abuts against the groove bottom and / or the groove top.

[0021] Optionally, the bearing rail is a C-shaped steel, a U-shaped steel, or an I-shaped steel.

[0022] Optionally, the conveying belt comprises a belt body and a flange part arranged on both sides of the belt body; the flange part is corrugated or zigzag-shaped in the extension direction of the conveying belt;

[0023] The bearing beam is fixedly connected inside the belt body, or the bearing beam is fixedly connected on the side of the belt body away from the turning structure;

[0024] The conveying belt further comprises a plurality of partition parts; the plurality of partition parts are sequentially and spacedly arranged between the two flange parts in the extension direction of the conveying belt;

[0025] The belt body, the flange part, the partition part, and the carrier vehicle are of an integrated structure.

[0026] Optionally, the number of the bearing ring-shaped bodies is two, and each bearing rail is supported and connected by a plurality of rail support frames for fixing on the ground;

[0027] When the bearing ring-shaped body comprises a bearing cable, the bearing structure comprises a bearing cable fixing device and a bearing cable support device, the end of each bearing cable passes through the bearing cable support device and is fixedly connected with the bearing cable fixing device; the bearing cable fixing device is configured to be fixed on the ground by anchoring;

[0028] When the bearing ring-shaped body comprises a bearing cable, the bearing structure further comprises a bearing cable guide device configured to support and guide the bearing cable; the matching position of the bearing cable and the bearing rail is between the connection position of the bearing cable and the bearing cable guide device and the connection position of the bearing cable and the bearing cable fixing device;

[0029] The number of the traction cables is two, and correspondingly, the first turning structure and the second turning structure each comprise two turning wheels; the two turning wheels are symmetrically arranged on both sides of the winding drum;

[0030] The conveying belt is located between the two traction cables, and the two traction cables are located between the two bearing ring-shaped bodies;

[0031] A pair of said walking wheels and a pair of said rope connecting devices are respectively connected on both sides of said load-bearing beam; said rope connecting device comprises a claw fixedly connected with said traction rope; said claw is located between said walking wheel and the connection of the cable beam, wherein the connection of the cable beam is the connection of said rope connecting device and said load-bearing beam.

[0032] Optionally, said traction rope comprises a head-to-tail upper running traction rope part and a lower running traction rope part;

[0033] Said upper running traction rope part comprises a lower turning wheel traction segment, a lower horizontal traction segment, an upper inclined traction segment and an upper horizontal traction segment connected in sequence;

[0034] Said lower running traction rope part comprises an upper turning wheel traction segment, an upper change direction traction segment, a lower inclined traction segment and a lower change direction traction segment connected in sequence;

[0035] One end of said lower turning wheel traction segment away from said lower horizontal traction segment is connected with one end of said lower change direction traction segment away from said lower inclined traction segment;

[0036] Said lower turning wheel traction segment is wound on the turning wheel of said first turning structure, and said upper turning wheel traction segment is wound on the turning wheel of said second turning structure;

[0037] Said lower horizontal traction segment is parallel to said upper horizontal traction segment, said upper inclined traction segment is parallel to said lower inclined traction segment, and said lower horizontal traction segment and said upper inclined traction segment have an included angle therebetween;

[0038] Said upper change direction traction segment is curved towards the direction of said second turning structure, and said lower change direction traction segment is curved towards the direction of said first turning structure;

[0039] Said traction structure further comprises a traction guide device for being fixed on the ground; the junctions of said lower horizontal traction segment and said upper inclined traction segment, and said upper inclined traction segment and said upper horizontal traction segment are provided with said traction guide device; said upper change direction traction segment and said lower change direction traction segment are provided with said traction guide device.

[0040] Optionally, said load-bearing ring body comprises a head-to-tail upper running load-bearing part and a lower running load-bearing part;

[0041] The shape of said upper running load-bearing part corresponds to the shape of said upper running traction rope part, and said upper running load-bearing part comprises a lower turning wheel load-bearing segment, a lower horizontal load-bearing segment, an upper inclined load-bearing segment and an upper horizontal load-bearing segment connected in sequence;

[0042] The shape of said lower running load-bearing part corresponds to the shape of said lower running traction rope part, and said lower running load-bearing part comprises an upper turning wheel load-bearing segment, an upper change direction load-bearing segment, a lower inclined load-bearing segment and a lower change direction load-bearing segment connected in sequence;

[0043] The lower turning wheel bearing section is connected to the end of the lower redirecting bearing section away from the lower inclined bearing section;

[0044] The lower turning wheel bearing section is located corresponding to the lower turning wheel traction section, the lower horizontal bearing section is located corresponding to the lower horizontal traction section, the upper inclined bearing section is located corresponding to the upper inclined traction section, the upper horizontal bearing section is located corresponding to the upper horizontal traction section, the upper turning wheel bearing section is located corresponding to the upper turning wheel bearing section; the upper redirecting bearing section is located corresponding to the upper redirecting traction section, the lower inclined bearing section is located corresponding to the lower inclined traction section, the lower redirecting bearing section is located corresponding to the lower redirecting traction section;

[0045] When the bearing ring body comprises two bearing tracks and two bearing cables, the bearing tracks comprise the lower turning wheel bearing section, at least part of the lower horizontal bearing section, at least part of the upper horizontal bearing section, the upper turning wheel bearing section, the upper redirecting bearing section and the lower redirecting bearing section; the bearing cables comprise the upper inclined bearing section and the lower inclined bearing section;

[0046] When the bearing ring body comprises a bearing track in a ring structure, the bearing track comprises a lower turning wheel bearing section, a lower horizontal bearing section, an upper inclined bearing section, an upper horizontal bearing section, an upper turning wheel bearing section, an upper redirecting bearing section, a lower inclined bearing section and a lower redirecting bearing section, and the bearing structure further comprises a plurality of track support frames for being fixed on the ground, and at least part of the track support frames simultaneously support the upper inclined bearing section and the lower inclined bearing section.

[0047] Optionally, the driving device is connected to the winding drum and the turning wheel of the same turning structure;

[0048] The turning structure further comprises a shaft coupling; in the same turning structure, the winding drum and the turning wheel are coaxially arranged and are both connected to the shaft coupling;

[0049] The traction cable is connected to a tensioning device; the tensioning device comprises one or more of a weight type structure, a hydraulic type structure and a lead screw type structure;

[0050] The double-drive bulk material conveying system further comprises a transfer device; the first turning structure is located at a low altitude position, and the second turning structure is located at a high altitude position opposite to the low altitude position; the low altitude position and the high altitude position are both provided with the transfer device and the stockyard; the transfer device is configured to reciprocatingly carry bulk material between the conveying belt and the stockyard.

[0051] A double-driven bulk material conveying gravity flow energy storage system, comprising the double-driven bulk material conveying system, and further comprising a power generation device.

[0052] The first turning structure is located at a low altitude position, and the second turning structure is located at a high altitude position opposite to the low altitude position.

[0053] When the conveying belt rotates in the first direction, the loaded bulk material is successively conveyed to the high altitude position, so as to convert the electric energy into gravitational potential energy storage.

[0054] The power generation device is connected to the first turning structure and / or the second turning structure; under the action of gravity, the conveying belt loaded with bulk material drives the conveying belt and the carrier to move in the second direction and successively convey the bulk material to the low altitude position and form a continuous gravity flow, while driving the first turning structure and the second turning structure to operate in the second direction, so as to drive the power generation device to generate electricity, so as to convert the continuous gravity flow into a continuous energy flow, thereby realizing continuous discharge; wherein the first direction is opposite to the second direction.

[0055] Optionally, the turning structure further comprises a shaft coupling; in the same turning structure, the winding drum and the turning wheel are coaxially arranged and connected to the shaft coupling.

[0056] The driving device is connected to the shaft coupling.

[0057] The power generation device is connected to the shaft coupling.

[0058] The driving device and the power generation device are motor generators, or the driving device and the power generation device are independent of each other.

[0059] An energy storage method, applicable to the double-driven bulk material conveying gravity flow energy storage system; the method comprises:

[0060] During energy storage charging, the bulk material is located at a low altitude position, the driving device is driven by electric energy, the first turning structure and the second turning structure are driven to rotate in the first direction, the traction rope and the conveying belt are driven to operate in the first direction, and all the carriers are driven to walk along the load ring body, while the conveying belt is synchronously driven to walk; the bulk material is successively loaded on the conveying belt, successively conveyed to a high altitude position along the load ring body, and unloaded, so as to convert the electric energy into gravitational potential energy storage.

[0061] When discharging, the bulk material is located at a high elevation, and the bulk material is loaded on the conveying belt successively and moves the conveying belt and the carrier along a second direction under the action of gravity, and the bulk material is conveyed to the low elevation successively and forms a continuous gravity flow, and the first turning structure and the second turning structure are driven to operate along the second direction, so that the power generation device continuously generates power, and the continuous gravity flow is converted into a continuous energy flow, so that the gravitational potential energy is converted into continuous electric energy.

[0062] Optionally, the travel speed and the amount of the bulk material are adjusted in real time according to requirements, so that the size of the gravity flow is changed, so that the energy flow is adjusted on demand, and then the'slow charging and fast discharging' or 'on-demand charging and discharging' function is realized.

[0063] The number of the double-drive bulk material conveying gravity flow energy storage systems is multiple; multiple double-drive bulk material conveying gravity flow energy storage systems are installed side by side in the horizontal direction according to the terrain, and / or multiple double-drive bulk material conveying gravity flow energy storage systems are stacked in the up-down direction according to the terrain.

[0064] The beneficial effects of the present application mainly include:

[0065] The double-drive bulk material conveying system, the gravity flow energy storage system and the energy storage method provided by the present application adopt a double-drive mode to jointly transport the bulk material loaded on the conveying belt by using a winding drum to drive the conveying belt and a turning wheel to drive a traction rope, so that the running resistance can be reduced to a certain extent, the carrying capacity of the conveying belt is effectively improved, the demand for the performance of the conveying belt is reduced to a certain extent, and the probability of faults such as longitudinal tearing and belt breakage of the conveying belt can be effectively reduced. All the carriers are carried by the bearing structure, and then the bulk material loaded on the conveying belt is carried by the carriers, so that the additional tension of the conveying belt caused by overcoming the weight of the bulk material and the like is effectively reduced or avoided, and the stability and carrying capacity of the double-drive bulk material conveying system are greatly improved.

[0066] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the detailed description is made below by referring to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0068] Figure 1 The first structure diagram of the double-drive bulk material conveying system provided by the embodiments of the present application is shown in the figure.

[0069] Figure 2 and Figure 3 is a partial enlarged view of the double drive bulk material conveying system shown in Figure 1

[0070] Figure 4 is an enlarged view of area A of the double drive bulk material conveying system shown in Figure 1

[0071] Figure 5 is an enlarged view of area B of the double drive bulk material conveying system shown in Figure 1

[0072] Figure 6 Figure 1 is a structural schematic view of the reel, the steering wheel, the driving device and the power generation device shown in

[0073] Figure 7 Figure 1 is a structural schematic view of the carrier shown in

[0074] Figure 8 Figure 7 is a partial enlarged view of the carrier shown in

[0075] Figure 9 is a structural schematic view of the rope connecting device provided by the embodiment of the present application

[0076] Figure 10

[0077] Figure 11 and Figure 12 is a partial enlarged view of the double drive bulk material conveying system shown in Figure 10

[0078] Figure 13 Figure 10 is an enlarged view of area C of the double drive bulk material conveying system shown in

[0079] ​​​​​​​​​icon: 100 - bearing structure; 110 - bearing rail; 111 - lower turning wheel bearing section; 112 - lower horizontal bearing section; 113 - upper inclined bearing section; 114 - upper horizontal bearing section; 115 - upper turning wheel bearing section; 116 - upper redirection bearing section; 117 - lower inclined bearing section; 118 - lower redirection bearing section; 120 - bearing cable; 130 - rail support frame; 140 - bearing cable fixing device; 150 - bearing cable support device; 200 - traction structure; 210 - traction cable; 211 - lower turning wheel traction section; 212 - lower horizontal traction section; 213 - upper inclined traction section; 214 - upper horizontal traction section; 215 - upper turning wheel traction section; 216 - upper redirection traction section; 217 - lower inclined traction section; 218 - lower redirection traction section; 220 - traction guide device; 300 - conveying structure; 310 - conveying belt; 311 - belt body; 312 - flange portion; 313 - partition portion; 320 - carrier vehicle; 321 - bearing beam; 322 - traveling wheel; 323 - rope connection device; 3231 - rope connection body; 3232 - gripper claw; 3233 - jaw; 3234 - carrier bearing; 400 - driving device; 500 - power generation device; 600 - first turning structure; 610 - winding drum; 620 - turning wheel; 700 - second turning structure. DETAILED DESCRIPTION

[0080] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0081] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0082] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0083] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0084] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0085] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other without conflict.

[0087] Embodiments

[0088] The present embodiment provides a double-drive bulk material conveying system, a gravity flow energy storage system and an energy storage method thereof, which can be used to store electric energy, especially electric energy generated by wind power and photovoltaic power generation technology, and can also be used to generate continuous discharge.

[0089] Referring to Figures 1-13 As shown in the drawings, the double-drive bulk material conveying system comprises a bearing structure 100, a traction structure 200, a conveying structure 300, a driving device 400, a first turning structure 600 and a second turning structure 700.

[0090] The conveying structure 300 comprises a conveying belt 310 in the form of a ring and a plurality of carrier vehicles 320; along the extension direction of the conveying belt 310, the plurality of carrier vehicles 320 are fixedly connected in sequence on the conveying belt 310; optionally, along the extension direction of the conveying belt 310, the plurality of carrier vehicles 320 are uniformly connected on the conveying belt 310.

[0091] The carrying structure 100 comprises a carrying ring body for carrying all the carrying vehicles 320; the carrying ring body has a ring shape; the carrying ring body is configured to carry all the carrying vehicles 320, and all the carrying vehicles 320 can move in circulation along the carrying ring body. As shown in Figures 1-5 Optionally, the carrying ring body comprises two carrying tracks 110 and two carrying ropes 120; the two carrying ropes 120 are arranged in parallel, and the two carrying tracks 110 are connected with two ends of the two carrying ropes 120 respectively, so that the two carrying tracks 110 and the two carrying ropes 120 form a ring shape; that is, the carrying ring body is a ring structure formed by the carrying tracks 110, the carrying ropes 120, the carrying tracks 110 and the carrying ropes 120 connected end to end. As shown in Figures 10-13 Optionally, the carrying ring body comprises a carrying track 110 having a ring shape.

[0092] The traction structure 200 comprises a traction rope 210 for traction of all the carrying vehicles 320; the traction rope 210 has a ring shape. The shape of the carrying ring body corresponds to the shape of the traction rope 210.

[0093] The first steering structure 600 and the second steering structure 700 are steering structures, and each comprises a winding drum 610 and a steering wheel 620; the conveying belt 310 moves in circulation between the winding drum 610 of the first steering structure 600 and the winding drum 610 of the second steering structure 700, and the traction rope 210 moves in circulation between the steering wheel 620 of the first steering structure 600 and the steering wheel 620 of the second steering structure 700. The double-drive bulk material conveying system can be used on a slope or on a flat surface; for example, the first steering structure 600 is located at a low altitude, and the second steering structure 700 is located at a high altitude opposite to the low altitude.

[0094] The driving device 400 is connected with the first steering structure 600 and / or the second steering structure 700, so as to drive the traction rope 210 and the conveying belt 310 to rotate in synchronization in a first direction, that is, to drive the first steering structure 600 and the second steering structure 700 to rotate in the first direction, so as to drive the carrying vehicles 320 to move along the carrying ring body, and at the same time, the carrying vehicles 320 move synchronously with the conveying belt 310. The driving device 400 is connected with the first steering structure 600 and / or the second steering structure 700, specifically, the driving device 400 is connected with the first steering structure 600, or the driving device 400 is connected with the second steering structure 700, or the driving device 400 is connected with the first steering structure 600 and the second steering structure 700.

[0095] In the optional embodiment, the dual-drive bulk material conveying system further includes transfer equipment and a stockpile yard for storing bulk materials; transfer equipment and stockpile yards are set up at both low and high altitudes; the transfer equipment is configured to reciprocate between the conveyor belt 310 and the stockpile yard to achieve charging, energy storage and discharging.

[0096] Optionally, both the first steering structure 600 and the second steering structure 700 are connected to the bracket.

[0097] See Figures 1-3 , Figures 10-12 As shown, in the optional embodiment, the axial direction of the first steering structure 600 and the axial direction of the second steering structure 700 are both parallel to the horizontal direction; this is equivalent to the first steering structure 600 and the second steering structure 700 being placed vertically. Compared to horizontal placement, this requires less ground space, has simpler terrain requirements, and is easier to install on more sloping terrains. Simultaneously, the smaller installation space facilitates the simultaneous installation of multiple systems, which can increase system capacity and enable high-power energy storage / discharge.

[0098] Optionally, both the steering wheel 620 of the first steering structure 600 and the steering wheel 620 of the second steering structure 700 are provided with traction wheel grooves that cooperate with the traction cable 210. The traction wheel grooves increase the friction between the traction cable 210 and the first steering structure 600 and the second steering structure 700, and also prevent the traction cable 210 from disengaging from the steering wheel 620 of the first steering structure 600 and the steering wheel 620 of the second steering structure 700.

[0099] The dual-drive bulk material conveying system described in this embodiment uses a drum 610 to drive the conveyor belt 310 and a steering wheel 620 to drive the traction cable 210. This dual-drive approach jointly transfers the bulk material loaded on the conveyor belt 310, which reduces running resistance to a certain extent, effectively improves the carrying capacity of the conveyor belt 310, and also reduces the performance requirements of the conveyor belt 310, effectively reducing the probability of longitudinal tearing, belt breakage, and other failures. The load-bearing structure 100 supports all the transport vehicles 320, which in turn carry the bulk material loaded on the conveyor belt 310. This effectively reduces or avoids the additional tension on the conveyor belt 310 due to overcoming the weight of the bulk material, greatly improving the stability and carrying capacity of the dual-drive bulk material conveying system.

[0100] In the dual-drive bulk material conveying system described in this embodiment, since the traction cable 210 bears part of the traction force, the conveyor belt 310 only bears part of the tensile stress along the walking direction. This can reduce the demand for traction force on the conveyor belt 310 to a certain extent, allowing the use of a more economical conveyor belt 310 and significantly improving the service life of the conveyor belt 310.

[0101] See Figures 1-3 ,Figures 10-12 As shown, in an optional solution of the embodiment, the carrying ring bodies are arranged in pairs, and the conveying belt 310 is located between the carrying ring bodies arranged in pairs; that is, the ring-shaped structure formed by the two carrying tracks 110 and the two carrying ropes 120 is arranged in pairs. By arranging the carrying ring bodies in pairs, the carrying vehicle 320 is better carried, so as to improve the stability of the carrying vehicle 320 to a certain extent during operation, thereby improving the stability of the conveying structure 300 during operation.

[0102] Alternatively, the traction ropes 210 are arranged in pairs, and the conveying belt 310 is located between the traction ropes 210 arranged in pairs; by arranging the traction ropes 210 in pairs, the carrying vehicle 320 is better pulled, so as to improve the stability of the carrying vehicle 320 during operation and improve the pulling force on the carrying vehicle 320, thereby improving the stability of the conveying structure 300 during operation and improving the pulling force on the carrying vehicle 320.

[0103] Referring to Figures 7-9 As shown, in an optional solution of the embodiment, the carrying vehicle 320 comprises a carrying beam 321, a walking wheel 322, and a rope connecting device 323; the carrying beam 321 is fixedly connected with the conveying belt 310; alternatively, the carrying beam 321 is fixedly connected inside the conveying belt 310, or the carrying beam 321 is fixedly connected on the side of the conveying belt 310 away from the turning structure, for example, the carrying beam 321 is fixedly connected above the conveying belt 310.

[0104] Alternatively, at least one pair of walking wheels 322 is pivotally connected on both sides of the carrying beam 321, and the walking wheel 322 is configured to be able to walk on the carrying ring body; alternatively, the number of the walking wheels 322 is consistent with the number of the carrying ring bodies. By arranging the walking wheels 322 and the carrying ring bodies in pairs, the carrying vehicle 320 is better carried, so as to improve the stability of the carrying vehicle 320 during operation to a certain extent, thereby improving the stability of the conveying structure 300 during operation. Wherein, the walking wheel 322 walks on the carrying ring body, that is, the walking wheel 322 walks on the carrying track 110 and the carrying rope 120.

[0105] Alternatively, at least one pair of rope connecting devices 323 is rotatably connected on both sides of the carrying beam 321; the rope connecting device 323 is fixedly connected with the traction rope 210, and the rotation axis of the rope connecting device 323 has an included angle with the extension direction of the traction rope 210. Alternatively, the rotation axis of the rope connecting device 323 is perpendicular to the extension direction of the traction rope 210. By rotatably connecting the rope connecting device 323 on the carrying beam 321, the carrying vehicle 320 is facilitated to walk along the ring-shaped traction rope 210. By adopting the pair of rope connecting devices 323 to connect the carrying beam 321, the stability of the carrying vehicle 320 during walking is improved. The number of the rope connecting devices 323 can be selected according to the material, connection strength, and other factors of the rope connecting device 323.

[0106] In this embodiment, the rope connecting device 323 can be in various forms, such as a claw type, a lock, etc. Referring to FIG. 6, in an optional solution of this embodiment, the rope connecting device 323 comprises a rope connecting body 3231 and a claw 3232; the claw 3232 is fixedly connected to the end of the rope connecting body 3231, and the jaw 3233 of the claw 3232 faces the center line of the traction cable 210, so as to facilitate the movement of the claw 3232 along with the traction cable 210, and to reduce the interference of the rope connecting device 323 with the rotation of the steering wheel 620 of the first steering structure 600 or the steering wheel 620 of the second steering structure 700 when the carrier vehicle 320 rotates to the first steering structure 600 or the second steering structure 700, so as to facilitate the smooth passing of the rope connecting device 323 through the steering wheel 620 of the first steering structure 600 or the steering wheel 620 of the second steering structure 700. Figure 9

[0107] The claw 3232 is fixedly connected to the traction cable 210. The carrier bearing 3234 is connected between the rope connecting body 3231 and the carrier beam 321. Through the carrier bearing 3234, the friction between the rope connecting body 3231 and the carrier beam 321 is reduced, which is helpful for the rotation of the carrier vehicle 320 at the first steering structure 600 or the second steering structure 700.

[0108] Optionally, the carrier bearing 3234 is a sliding bearing. The sliding bearing has high carrying capacity, which provides guarantee for the continuous conveying of bulk materials by the double-drive bulk material conveying system.

[0109] Optionally, the walking wheel 322 is a roller bearing. The roller bearing can bear a large radial load, which is conducive to carrying the carrier vehicle 320 and in turn is conducive to carrying the bulk materials on the conveying belt 310.

[0110] Optionally, when the carrier ring body comprises the carrier cable 120, the walking wheel 322 has a walking wheel groove matched with the carrier cable 120; through the walking wheel groove, the walking wheel 322 is facilitated to walk on the carrier cable 120.

[0111] Optionally, the carrier track 110 has a wheel groove matched with the walking wheel 322; along the radial direction of the walking wheel 322, the carrier track 110 has a corresponding groove bottom and groove top, the groove bottom and the groove top form the wheel groove, the wheel groove extends along the extension direction of the carrier track 110, and the walking wheel 322 abuts against the groove bottom and / or the groove top; when the walking wheel 322 rolls, the walking wheel 322 abuts against the groove bottom and / or the groove top. Through the rolling of the walking wheel 322 in the wheel groove of the carrier track 110, the movement of the walking wheel 322 along the carrier track 110 can be realized, that is, the movement of the carrier vehicle 320 along the carrier track 110 can be realized.

[0112] ​Optionally, the bearing rail 110 is a C-shaped steel, a U-shaped steel, or an I-shaped steel, or other profiles with a wheel groove structure.

[0113] Referring to Figures 1-13 In an optional embodiment of the present application, the conveying belt 310 includes a belt body 311 and a baffle portion 312 arranged on both sides of the belt body 311. The baffle portion 312 is corrugated or zigzag-shaped along the extension direction of the conveying belt 310. The baffle portion 312 is used to improve the carrying capacity of the conveying belt 310 and effectively prevent the bulk material from sliding. The corrugated or zigzag-shaped baffle portion 312 can realize the turning of the conveying belt 310 at the turning structure, such as the turning of the conveying belt 310 on the drum 610 of the first turning structure 600 and the drum 610 of the second turning structure 700.

[0114] Optionally, the bearing beam 321 is fixedly connected inside the belt body 311, or the bearing beam 321 is fixedly connected to the side of the belt body 311 away from the turning structure, such as the bearing beam 321 fixedly connected above the belt body 311.

[0115] Optionally, the conveying belt 310 further includes a plurality of partition portions 313. The plurality of partition portions 313 are sequentially and spacedly arranged between the two baffle portions 312 along the extension direction of the conveying belt 310. The baffle portion 312 and the partition portion 313 are used to improve the carrying capacity of the conveying belt 310 and effectively prevent the bulk material from sliding. The height of the baffle portion 312, the spacing of the partition portion 313, and the width of the belt body 311 can be customized as needed. The bulk material is lifted or lowered by the traction cable 210 driving the carrier 320 and the conveying belt 310 on the carrier 320.

[0116] Optionally, the belt body 311, the baffle portion 312, the partition portion 313, and the carrier 320 are an integral structure. For example, the belt body 311, the baffle portion 312, the partition portion 313, and the bearing beam 321 are an integral structure. For example, based on a general standard corrugated baffle belt (i.e., the conveying belt 310), the bearing beam 321 of the carrier 320 is embedded in the base belt (i.e., the belt body 311) to make the belt body 311 and the carrier 320 an integral structure. Optionally, one side of the belt body 311 is a smooth surface, and the other side is connected with the baffle portion 312 and the partition portion 313. The other side of the belt body 311 can also be connected with the bearing beam 321, or the bearing beam 321 is located inside the belt body 311. The smooth surface of one side of the belt body 311 is used to ensure that the conveying belt 310 passes through the drum 610 without obstacles.

[0117] Referring to Figures 1-3 , Figures 10-12 In an optional embodiment of the present application, the number of the bearing ring-shaped bodies is two, and each bearing rail 110 is supported and connected by a plurality of rail support frames 130. The rail support frame 130 is used to be fixed on the ground.

[0118] Optionally, as shown in Figures 1-5 When the load ring body includes the load cable 120, the load structure 100 includes a load cable fixing device 140 and a load cable support device 150; the end of each load cable 120 passes through the load cable support device 150 and is fixedly connected with the load cable fixing device 140; the load cable 120 is supported and connected by the load cable support device 150, so that the load cable 120 is located at a proper height, and the end of the load cable 120 is fixed, for example, fixed on the ground, by the load cable fixing device 140. Optionally, the load cable support device 150 is used to be fixed on the ground. Optionally, the load cable fixing device 140 is configured to be fixed on the ground in an anchoring manner.

[0119] Optionally, as shown in Figures 1-5 When the load ring body includes the load cable 120, the load structure 100 further includes a load cable guide device configured to support the guide load cable 120; the matching part of the load cable 120 with the load rail 110 is located between the connection part of the load cable 120 with the load cable guide device and the connection part of the load cable 120 with the load cable fixing device 140; that is, the load cable guide device, the end of the load rail 110, the load cable support device 150 and the load cable fixing device 140 are arranged in sequence along the extension direction of the load cable 120. By the load cable guide device, the direction of the load cable 120 can be changed, which is beneficial to the connection of the load cable 120 with the load rail 110.

[0120] Optionally, the number of the traction cables 210 is two, and correspondingly, the first steering structure 600 and the second steering structure 700 each include two steering wheels 620; the two steering wheels 620 are symmetrically arranged on both sides of the winding drum 610.

[0121] The conveying belt 310 is located between the two traction cables 210, and the two traction cables 210 are located between the two load ring bodies.

[0122] Optionally, a pair of walking wheels 322 and a pair of rope connecting devices 323 are connected on both sides of the load beam 321 respectively; the rope connecting device 323 includes a claw 3232 fixedly connected with the traction cable 210; the claw 3232 is located between the walking wheel 322 and the cable beam connecting part, wherein the cable beam connecting part is the connecting part of the rope connecting device 323 with the load beam 321. By the above design, the stability of the traction cable 210 in traction of the carrier 320 can be effectively improved.

[0123] As shown in Figures 1-3 , Figures 10-12 In the optional scheme of the embodiment, the traction cable 210 includes an uplink traction cable part and a downlink traction cable part connected in a head-to-tail manner; the uplink traction cable part and the downlink traction cable part are connected in a head-to-tail manner to form a ring structure.

[0124] The uplink traction rope part comprises a lower turning wheel traction segment 211, a lower horizontal traction segment 212, an upper inclined traction segment 213 and an upper horizontal traction segment 214 connected in sequence; the downlink traction rope part comprises an upper turning wheel traction segment 215, an upper redirection traction segment 216, a lower inclined traction segment 217 and a lower redirection traction segment 218 connected in sequence; one end of the lower turning wheel traction segment 211 away from the lower horizontal traction segment 212 is connected to one end of the lower redirection traction segment 218 away from the lower inclined traction segment 217; that is, the lower turning wheel traction segment 211, the lower horizontal traction segment 212, the upper inclined traction segment 213, the upper horizontal traction segment 214, the upper turning wheel traction segment 215, the upper redirection traction segment 216, the lower inclined traction segment 217 and the lower redirection traction segment 218 are connected in sequence to form a ring structure.

[0125] Optionally, the lower turning wheel traction segment 211 is wound on the turning wheel 620 of the first turning structure 600, and the upper turning wheel traction segment 215 is wound on the turning wheel 620 of the second turning structure 700.

[0126] Optionally, the lower horizontal traction segment 212 is parallel to the upper horizontal traction segment 214, and the lower horizontal traction segment 212 and the upper horizontal traction segment 214 help to transfer the conveying belt 310 and the bulk material loaded thereon, and facilitate smooth transition.

[0127] Optionally, the upper inclined traction segment 213 is parallel to the lower inclined traction segment 217, and the lower horizontal traction segment 212 and the upper inclined traction segment 213 have an included angle; the upper inclined traction segment 213 and the lower inclined traction segment 217 help to store and release energy of the bulk material loaded on the conveying belt 310.

[0128] Optionally, the upper redirection traction segment 216 is curved towards the direction of the second turning structure 700, and the lower redirection traction segment 218 is curved towards the direction of the first turning structure 600; the upper redirection traction segment 216 and the lower redirection traction segment 218 help to reduce the height of the track support frame 130, increase overall stability and reduce investment.

[0129] Optionally, the traction structure 200 further comprises traction guide devices 220 for fixing on the ground; the traction guide devices 220 are arranged at the junction of the lower horizontal traction segment 212 and the upper inclined traction segment 213, and at the junction of the upper inclined traction segment 213 and the upper horizontal traction segment 214; the traction guide devices 220 are arranged at the junction of the lower horizontal traction segment 212 and the upper inclined traction segment 213 to turn the traction structure 200; the traction guide devices 220 are arranged at the junction of the upper inclined traction segment 213 and the upper horizontal traction segment 214 to turn the traction structure 200.

[0130] Optionally, the upper redirecting traction section 216 and the lower redirecting traction section 218 are both provided with traction guide devices 220. By providing the upper redirecting traction section 216 and the lower redirecting traction section 218 with traction guide devices 220, the contact angle and contact area of the traction cable 210 with the traction guide devices 220 are increased, which is conducive to the turning of the upper redirecting traction section 216 and the lower redirecting traction section 218, and thus is conducive to reducing the height of the track support frame 130, increasing the overall stability and reducing the investment.

[0131] Referring to FIG. 7, in an optional embodiment of the present embodiment, the bearing ring body comprises a first bearing section and a second bearing section connected end to end. Figures 1-3 、 Figures 10-12 The first bearing section and the second bearing section are connected end to end to form a ring structure.

[0132] The shape of the first bearing section corresponds to the shape of the upper traction cable section, i.e., the first bearing section comprises a lower turning wheel bearing section 111, a lower horizontal bearing section 112, an upper inclined bearing section 113 and an upper horizontal bearing section 114 connected in sequence; the shape of the second bearing section corresponds to the shape of the lower traction cable section, i.e., the second bearing section comprises an upper turning wheel bearing section 115, an upper redirecting bearing section 116, a lower inclined bearing section 117 and a lower redirecting bearing section 118 connected in sequence.

[0133] Specifically, one end of the lower turning wheel bearing section 111 away from the lower horizontal bearing section 112 is connected to one end of the lower redirecting bearing section 118 away from the lower inclined bearing section 117; the position of the lower turning wheel bearing section 111 corresponds to the position of the lower turning wheel traction section 211, the position of the lower horizontal bearing section 112 corresponds to the position of the lower horizontal traction section 212, the position of the upper inclined bearing section 113 corresponds to the position of the upper inclined traction section 213, the position of the upper horizontal bearing section 114 corresponds to the position of the upper horizontal traction section 214, and the position of the upper turning wheel bearing section 115 corresponds to the position of the upper turning wheel bearing section 115; the position of the upper redirecting bearing section 116 corresponds to the position of the upper redirecting traction section 216, the position of the lower inclined bearing section 117 corresponds to the position of the lower inclined traction section 217, and the position of the lower redirecting bearing section 118 corresponds to the position of the lower redirecting traction section 218; that is, the lower horizontal bearing section 112 is parallel to the upper horizontal bearing section 114, the upper inclined bearing section 113 is parallel to the lower inclined bearing section 117, and the lower horizontal bearing section 112 and the upper inclined bearing section 113 form an included angle; the upper redirecting bearing section 116 is curved towards the direction of the second turning structure 700, and the lower redirecting bearing section 118 is curved towards the direction of the first turning structure 600.

[0134] As shown in FIG. 7, in an optional embodiment of the present embodiment, the bearing ring body comprises a first bearing section and a second bearing section connected end to end. Figures 1-5As shown, optionally, when the load-carrying annular body comprises two load-carrying tracks 110 and two load-carrying cables 120, the load-carrying track 110 comprises a lower deflection wheel load-carrying section 111, at least a partial lower horizontal load-carrying section 112, at least a partial upper horizontal load-carrying section 114, an upper deflection wheel load-carrying section 115, an upper change direction load-carrying section 116, and a lower change direction load-carrying section 118. Optionally, the load-carrying cable 120 comprises an upper inclined load-carrying section 113 and a lower inclined load-carrying section 117.

[0135] As shown in FIG. 01- Figure 13 As shown, optionally, when the load-carrying annular body comprises a load-carrying track 110 in a ring structure, the load-carrying track 110 comprises a lower deflection wheel load-carrying section 111, a lower horizontal load-carrying section 112, an upper inclined load-carrying section 113, an upper horizontal load-carrying section 114, an upper deflection wheel load-carrying section 115, an upper change direction load-carrying section 116, a lower inclined load-carrying section 117, and a lower change direction load-carrying section 118, and the load-carrying structure 100 further comprises a plurality of track support frames 130 for being fixed on the ground. Optionally, at least part of the track support frames 130 simultaneously support the connection between the upper inclined load-carrying section 113 and the lower inclined load-carrying section 117. By at least part of the track support frames 130 simultaneously supporting the connection between the upper inclined load-carrying section 113 and the lower inclined load-carrying section 117, the overall stability is increased and the investment is reduced.

[0136] As shown in FIG. 01- Figure 5 As shown, in an optional scheme of the present embodiment, the driving device 400 is connected to the winding drum 610 and the deflection wheel 620 of the same deflection structure; so that the driving device 400 drives the winding drum 610 and the deflection wheel 620 of the same deflection structure to rotate.

[0137] Optionally, the deflection structure further comprises a shaft coupling; in the same deflection structure, the winding drum 610 and the deflection wheel 620 are coaxially arranged and are both connected to the shaft coupling.

[0138] Optionally, the traction cable 210 is connected to a tensioning device; by the tensioning device, the pre-tightening force of the traction cable 210 is improved, which helps the normal operation of the traction cable 210. Optionally, the load-carrying cable 120 is connected to a tensioning device; by the tensioning device, the pre-tightening force of the load-carrying cable 120 is improved, which helps the normal operation of the load-carrying cable 120. In the present embodiment, the tensioning device comprises one or more of a weight type structure, a hydraulic type structure, and a lead screw type structure, and the tensioning device can also adopt other forms of structures.

[0139] The present embodiment also provides a double-drive bulk material conveying gravity flow energy storage system, which comprises the double-drive bulk material conveying system of any one of the above-mentioned embodiments and further comprises a power generation device 500.

[0140] The first deflection structure 600 is located at a low altitude position, and the second deflection structure 700 is located at a high altitude position opposite to the low altitude position.

[0141] When the conveying belt 310 rotates in the first direction, i.e., when the driving device 400 simultaneously drives the traction rope 210 and the conveying belt 310 to rotate in the first direction, the conveying belt 310 can drive the loaded bulk material to be successively conveyed to a high altitude, so as to convert electric energy into gravitational potential energy.

[0142] The power generation device 500 is connected to the first steering structure 600 and / or the second steering structure 700; under the action of gravity, the conveying belt 310 loaded with bulk material drives the conveying belt 310 and the carrier vehicle 320 to move in the second direction and successively convey the bulk material to a low altitude to form a continuous gravitational flow, and simultaneously drives the first steering structure 600 and the second steering structure 700 to operate in the second direction, so as to drive the power generation device 500 to generate electricity, so as to convert the continuous gravitational flow into a continuous energy flow, thereby realizing continuous discharge; wherein the first direction is opposite to the second direction. For example, the first direction is the clockwise direction, and the second direction is the counterclockwise direction, and vice versa. When the carrier vehicle 320 moves in the second direction, for example, the carrier vehicle 320 moves along the bearing ring body and in the second direction.

[0143] The double-drive bulk material conveying gravitational flow energy storage system in the embodiment drives the conveying belt 310 by the winding drum 610 and drives the traction rope 210 by the steering wheel 620, so as to jointly transport the bulk material loaded on the conveying belt 310 in a double-drive manner, which can reduce the running resistance to a certain extent, effectively improve the carrying capacity of the conveying belt 310, and to a certain extent, reduce the demand for the performance of the conveying belt 310, so as to effectively reduce the probability of faults such as longitudinal tearing and belt breakage of the conveying belt 310. All carrier vehicles 320 are carried by the bearing structure 100, which effectively reduces or avoids the additional tension of the conveying belt 310 due to overcoming the weight of the bulk material and other factors, greatly improving the stability and carrying capacity of the system. The continuous gravitational flow can be converted into a continuous energy flow by the power generation device 500, thereby realizing continuous discharge.

[0144] The double-drive bulk material conveying gravitational flow energy storage system provided in the embodiment includes the above-mentioned double-drive bulk material conveying system, and the technical features of the above-mentioned double-drive bulk material conveying system are also applicable to the double-drive bulk material conveying gravitational flow energy storage system. The technical features of the above-mentioned double-drive bulk material conveying system are not described again. The double-drive bulk material conveying gravitational flow energy storage system in the embodiment has the advantages of the above-mentioned double-drive bulk material conveying system, and the advantages of the above-mentioned double-drive bulk material conveying system are not described again.

[0145] Optionally, the steering structure further includes a shaft coupling; in the same steering structure, the winding drum 610 and the steering wheel 620 are coaxially arranged and are both connected to the shaft coupling. That is, the winding drum 610 and the steering wheel 620 of the first steering structure 600 are coaxially arranged, and the winding drum 610 and the steering wheel 620 of the second steering structure 700 are coaxially arranged.

[0146] Optionally, the driving device 400 is connected to the coupling; in this embodiment, the driving device 400 can be arranged at a low altitude position or a high altitude position, or driving devices 400 are arranged at both the low altitude position and the high altitude position to drive the coupling. The high altitude position can reduce the load during energy storage, and the low altitude position facilitates the installation of the driving device 400.

[0147] Optionally, the power generation device 500 is connected to the coupling; in this embodiment, the power generation device 500 can be arranged at a low altitude position or a high altitude position, or power generation devices 500 are arranged at both the low altitude position and the high altitude position to drive the coupling. The high altitude position can reduce the load during energy storage, and the low altitude position facilitates the installation of the power generation device 500.

[0148] In this embodiment, the driving device 400 and the power generation device 500 can be integrated or separate. Optionally, the driving device 400 and the power generation device 500 are motor-generators, or the driving device 400 and the power generation device 500 are independent of each other. The motor-generator (English name) in this embodiment refers to a device that can operate as a motor to convert electrical energy into gravitational potential energy, and as a generator to convert gravitational potential energy into electrical energy, which has a bidirectional energy conversion function.

[0149] This embodiment also provides an energy storage method applicable to the double-drive bulk material conveying gravity flow energy storage system of any of the above embodiments; the method comprises:

[0150] During energy storage charging, the bulk material is located at a low altitude position, the driving device 400 is driven by electrical energy, the first steering structure 600 and the second steering structure 700 are driven to rotate in a first direction, the traction cable 210 and the conveying belt 310 are driven to operate in the first direction, all the carrier vehicles 320 are driven to walk along the carrier annular body, and the conveying belt 310 is driven to walk synchronously; the bulk material is loaded on the conveying belt 310 in succession, is conveyed to a high altitude position along the carrier annular body in succession, and is unloaded, so as to convert electrical energy into gravitational potential energy for storage.

[0151] During discharging, the bulk material is located at a high altitude position, the bulk material is loaded on the conveying belt 310 in succession and is driven by gravity, the conveying belt 310 and the carrier vehicle 320 are driven to move in a second direction and convey the bulk material to a low altitude position in succession to form a continuous gravity flow, the first steering structure 600 and the second steering structure 700 are driven to operate in the second direction, the power generation device 500 is continuously powered to generate electricity, the continuous gravity flow is converted into a continuous energy flow, the gravitational potential energy is converted into continuous electrical energy, and continuous discharging is realized.

[0152] The energy storage method provided by the embodiment is suitable for the double-driven bulk material conveying gravity flow energy storage system described above, and the technical features of the double-driven bulk material conveying gravity flow energy storage system disclosed above are also applicable to the energy storage method, and the technical features of the double-driven bulk material conveying gravity flow energy storage system disclosed above will not be described repeatedly. The double-driven bulk material conveying gravity flow energy storage system described in the embodiment adopts the energy storage method described above, and the energy storage method disclosed above is also applicable to the double-driven bulk material conveying gravity flow energy storage system.

[0153] Optionally, the travel speed and quantity of the bulk material can be adjusted in real time according to requirements to change the size of the gravity flow, so as to adjust the energy flow on demand, thereby realizing the functions of "slow charging and fast discharging" or "charging and discharging on demand". The travel speed of the bulk material can be adjusted, for example, by adjusting the speed of the driving device 400 and the power generation device 500. By adjusting the travel speed and quantity of the bulk material in real time according to requirements to change the size of the gravity flow, the adaptability of the double-driven bulk material conveying gravity flow energy storage system is wider.

[0154] Optionally, the number of the double-driven bulk material conveying gravity flow energy storage systems is multiple; a plurality of double-driven bulk material conveying gravity flow energy storage systems are installed side by side in the horizontal direction according to the terrain, and / or a plurality of double-driven bulk material conveying gravity flow energy storage systems are stacked in the vertical direction according to the terrain. By installing a plurality of double-driven bulk material conveying gravity flow energy storage systems side by side in the horizontal direction according to the terrain, and stacking a plurality of double-driven bulk material conveying gravity flow energy storage systems in the vertical direction according to the terrain, a larger scale of energy storage can be realized.

[0155] At present, most of the gravity energy storage systems have intermittent charging / discharging problems because they rely on the lifting of heavy objects to realize potential energy conversion. The double-driven bulk material conveying system, the gravity flow energy storage system and the energy storage method thereof described in the embodiment are a new type of mechanical gravity energy storage technology, which aims to provide continuous gravity flow by using bulk energy storage bodies to realize continuous energy flow and solve the problems of intermittency, difficult site selection and large investment of existing gravity energy storage.

[0156] The double-driven bulk material conveying system, the gravity flow energy storage system and the energy storage method thereof described in the embodiment have the following advantages:

[0157] 1. The conveying principle in the field of bulk material transportation is applied to the field of gravity energy storage to realize continuous gravity flow energy storage.

[0158] 2. The traditional belt conveyor is driven by a belt, and the present scheme adopts a winding drum 610 to drive the conveyor belt 310 and a steering wheel 620 to drive the traction cable 210, so as to jointly transport the bulk material loaded on the conveyor belt 310 in a double-drive manner, thereby effectively improving the carrying capacity of the conveyor belt 310; the traction cable 210 and the conveyor belt 310 jointly drive the bulk material loaded on the conveyor belt 310, the bearing structure 100 bears all the carrying vehicles 320, and then the carrying vehicles 320 bear the bulk material loaded on the conveyor belt 310, thereby effectively reducing or avoiding the bearing capacity of the conveyor belt 310 and the traction cable 210, greatly improving the stability and carrying capacity of the double-drive bulk material conveying system. Through the bearing structure 100 and the traction cable 210, the conveyor belt 310 only bears part of the tensile stress in the walking direction, thereby reducing the demand for the performance of the conveyor belt 310, and a more economical conveyor belt 310 can be used, which can greatly improve the service life. At the same time, the conveyor belt 310 that bears part of the traction force can also reduce the probability of faults such as longitudinal tearing and belt breaking.

[0159] 3. The traditional belt conveyor is supported by a roller to support the upper and lower branch belts, and when the traction type belt runs, the roller is driven to rotate. In the embodiment, the carrying vehicle 320 supports the conveyor belt 310, and the traction cable + conveyor belt 310 drives the carrying vehicle 320 and the conveyor belt 310 to jointly run through the traction cable, thereby avoiding the indentation resistance between the conveyor belt 310 and the roller and the extrusion resistance when the material passes through the roller, greatly reducing the running resistance and improving the carrying efficiency.

[0160] 4. The carrying vehicle 320 is used instead of the roller, and the carrying vehicle 320 is connected with the conveyor belt 310 to form an integral whole, and when the carrying vehicle 320 runs along the bearing structure 100, the rolling resistance between the wheels of the carrying vehicle 320 and the bearing structure 100 is much smaller than the rolling resistance of the roller.

[0161] 5. The roller is not installed directly opposite the conveyor belt 310, which has a twisting effect and is prone to cause the conveyor belt 310 to deviate. In the embodiment, the carrying vehicle 320 is fixed with the conveyor belt 310, and there is no problem of deviation of the conveyor belt.

[0162] 6. The roller is arranged along the whole conveying line, and a large amount of manpower, material resources and time are consumed for inspection and maintenance. In the embodiment, the carrying vehicle 320 can be repaired at a specific position.

[0163] 7. In order to cooperate with the traction cable, an integrated steering wheel 620 + winding drum 610 is innovatively designed, the steering wheel 620 and the winding drum 610 are installed on the same shaft, the diameter of the steering wheel 620 and the diameter of the winding drum 610 match the diameter of the steel wire rope and the thickness of the conveyor belt 310; and the carrying beam 321 of the carrying vehicle 320 is innovatively designed to be directly embedded in the conveyor belt 310 in the production process of the conveyor belt 310, thereby ensuring the stability of the carrying beam 321.

[0164] 8. In order to reduce the space occupation of the system for wider application, the traction guide device 220 is designed to lift the lower turning traction section 218 to avoid contact with the ground, and to pull the upper inclined traction section 213 and the lower inclined traction section 217 closer through the upper turning traction section 216. At the same time, the traction guide device 220 also increases the contact angle / contact area of the traction cable with the steering wheel 620, improves the friction, and can improve the system capacity and charging / discharging power.

[0165] 9. The bearing cable 120 replaces the track installed on the ground, can cross the gully terrain, greatly reduces the investment of civil engineering and steel structure, and avoids large-scale ground occupation and protects vegetation.

[0166] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. 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 twin drive bulk material conveying system characterized by, The bulk storage yard comprises a bearing structure (100), a traction structure (200), a conveying structure (300), a driving device (400), a first turning structure (600), a second turning structure (700) and a bulk storage yard for storing bulk materials; The conveying structure (300) comprises a conveying belt (310) in a ring shape and a plurality of carrier vehicles (320); the plurality of carrier vehicles (320) are sequentially fixedly connected to the conveying belt (310) along the extension direction of the conveying belt (310); The bearing structure (100) comprises a bearing ring body for bearing all the carrier vehicles (320); the bearing ring body is in a ring shape; The traction structure (200) comprises a traction rope (210) for traction of all the carrier vehicles (320); the traction rope (210) is in a ring shape; The first turning structure (600) and the second turning structure (700) are both turning structures, and each comprises a winding drum (610) and a turning wheel (620); the conveying belt (310) circulates between the winding drum (610) of the first turning structure (600) and the winding drum (610) of the second turning structure (700), and the traction rope (210) circulates between the turning wheel (620) of the first turning structure (600) and the turning wheel (620) of the second turning structure (700); The driving device (400) is connected to the first turning structure (600) and / or the second turning structure (700) to drive the traction rope (210) and the conveying belt (310) to rotate synchronously in a first direction, thereby driving the carrier vehicles (320) to move synchronously along the bearing ring body and the conveying belt (310); The bearing ring body comprises two bearing tracks (110) and two bearing ropes (120); the two bearing ropes (120) are arranged in parallel, and the two bearing tracks (110) are respectively connected to two ends of the two bearing ropes (120); the bearing tracks (110) are arranged at positions corresponding to the positions of the turning structures, so that the two bearing tracks (110) and the two bearing ropes (120) form a ring structure; alternatively, the bearing ring body comprises a bearing track (110) in a ring shape; The carrier vehicle (320) comprises a walking wheel (322); the bearing track (110) has a wheel groove matched with the walking wheel (322); along the radial direction of the walking wheel (322), the bearing track (110) has a corresponding groove bottom and groove top, and the groove bottom and the groove top form the wheel groove; the wheel groove extends along the extension direction of the bearing track (110), and the walking wheel (322) abuts against the groove bottom and / or the groove top.

2. The twin drive bulk material conveying system of claim 1, wherein, The bearing ring bodies are arranged in pairs, and the conveying belt (310) is located between the bearing ring bodies arranged in pairs; The traction ropes (210) are arranged in pairs, and the conveying belt (310) is located between the traction ropes (210) arranged in pairs; The bearing ring bodies are arranged in pairs, and the conveying belt (310) is located between the bearing ring bodies arranged in pairs; The traction ropes (210) are arranged in pairs, and the conveying belt (310) is located between the traction ropes (210) arranged in pairs; The carrier (320) comprises a carrying beam (321) and a rope connecting device (323); the carrying beam (321) is fixedly connected with the conveying belt (310); At least one pair of the walking wheels (322) are pivotally connected on both sides of the carrying beam (321), and the walking wheels (322) are configured to walk on the carrying ring body; At least one pair of the rope connecting devices (323) are rotatably connected on both sides of the carrying beam (321); the rope connecting device (323) is fixedly connected with the traction rope (210), and the rotation axis of the rope connecting device (323) has an included angle with the extension direction of the traction rope (210).

3. The twin drive bulk material conveying system of claim 2, wherein, The rope connecting device (323) comprises a rope connecting body (3231) and a gripper (3232); the gripper (3232) is fixedly connected at the end of the rope connecting body (3231), and the jaw (3233) of the gripper (3232) faces the center line of the traction rope (210); the gripper (3232) is fixedly connected with the traction rope (210); the rope connecting body (3231) is connected with the carrying beam (321) through a carrying bearing (3234); When the carrying ring body comprises a carrying rope (120), the walking wheel (322) has a walking wheel groove matched with the carrying rope (120).

4. The twin drive bulk material conveying system of claim 2, wherein, The conveying belt (310) comprises a belt body (311) and a flange portion (312) arranged on both sides of the belt body (311); along the extension direction of the conveying belt (310), the flange portion (312) is in a corrugated shape or a zigzag shape; The carrying beam (321) is fixedly connected inside the belt body (311), or the carrying beam (321) is fixedly connected on the side of the belt body (311) away from the turning structure; The conveying belt (310) further comprises a plurality of partition portions (313); along the extension direction of the conveying belt (310), a plurality of the partition portions (313) are sequentially and spacedly arranged between two flange portions (312); The belt body (311), the flange portion (312), the partition portion (313) and the carrier (320) are in an integrated structure.

5. The dual drive bulk material conveying system of claim 2, wherein, The number of the carrying ring bodies is two, and each carrying track (110) is supported and connected by a plurality of track support frames (130) fixed on the ground; When the carrying ring body comprises a carrying rope (120), the carrying structure (100) comprises a carrying rope fixing device (140) and a carrying rope supporting device (150), and the end of each carrying rope (120) passes through the carrying rope supporting device (150) and is fixedly connected with the carrying rope fixing device (140); the carrying rope fixing device (140) is configured to be fixed on the ground in an anchoring manner; When the load-carrying ring body comprises a load-carrying cable (120), the load-carrying structure (100) further comprises a load-carrying cable guide configured to support and guide the load-carrying cable (120); the load-carrying cable (120) is connected to the load-carrying cable guide and the load-carrying cable fixing device (140) between the load-carrying cable (120) and the load-carrying cable guide; The number of the traction cables (210) is two, and correspondingly, the first steering structure (600) and the second steering structure (700) each comprise two steering wheels (620); the two steering wheels (620) are symmetrically arranged on both sides of the winding drum (610); The conveying belt (310) is located between the two traction cables (210), and the two traction cables (210) are located between the two load-carrying ring bodies; A pair of the walking wheels (322) and a pair of the rope connecting devices (323) are respectively connected to both sides of the load-carrying beam (321); the rope connecting device (323) comprises a claw (3232) fixedly connected with the traction cable (210); the claw (3232) is located between the walking wheel (322) and the cable beam connecting portion, wherein the cable beam connecting portion is the connecting portion between the rope connecting device (323) and the load-carrying beam (321).

6. The twin drive bulk material conveying system of claim 1, wherein, The traction cable (210) comprises an uplink traction cable part and a downlink traction cable part connected end to end; The uplink traction cable part comprises a lower steering wheel traction segment (211), a lower horizontal traction segment (212), an upper inclined traction segment (213) and an upper horizontal traction segment (214) connected in sequence; The downlink traction cable part comprises an upper steering wheel traction segment (215), an upper redirection traction segment (216), a lower inclined traction segment (217) and a lower redirection traction segment (218) connected in sequence; One end of the lower steering wheel traction segment (211) away from the lower horizontal traction segment (212) is connected to one end of the lower redirection traction segment (218) away from the lower inclined traction segment (217); The lower steering wheel traction segment (211) is wound around the steering wheel (620) of the first steering structure (600), and the upper steering wheel traction segment (215) is wound around the steering wheel (620) of the second steering structure (700); The lower horizontal traction segment (212) is parallel to the upper horizontal traction segment (214), the upper inclined traction segment (213) is parallel to the lower inclined traction segment (217), and the lower horizontal traction segment (212) and the upper inclined traction segment (213) form an included angle therebetween; The upper redirection traction segment (216) is curved towards the second steering structure (700), and the lower redirection traction segment (218) is curved towards the first steering structure (600). The traction structure (200) further comprises traction guide devices (220) for fixing on the ground; the traction guide devices (220) are arranged at the joint of the lower horizontal traction section (212) and the upper inclined traction section (213), and the joint of the upper inclined traction section (213) and the upper horizontal traction section (214); the upper redirection traction section (216) and the lower redirection traction section (218) are both provided with the traction guide devices (220).

7. The twin drive bulk material conveying system of claim 6, wherein, The load-carrying ring body comprises a head-to-tail upper load-carrying part and a lower load-carrying part; The shape of the upper load-carrying part corresponds to the shape of the upper traction cable part, and the upper load-carrying part comprises a lower steering wheel load-carrying section (111), a lower horizontal load-carrying section (112), an upper inclined load-carrying section (113), and an upper horizontal load-carrying section (114) connected in sequence; The shape of the lower load-carrying part corresponds to the shape of the lower traction cable part, and the lower load-carrying part comprises an upper steering wheel load-carrying section (115), an upper redirection load-carrying section (116), a lower inclined load-carrying section (117), and a lower redirection load-carrying section (118) connected in sequence; The end of the lower steering wheel load-carrying section (111) away from the lower horizontal load-carrying section (112) is connected to the end of the lower redirection load-carrying section (118) away from the lower inclined load-carrying section (117); The position of the lower steering wheel load-carrying section (111) corresponds to the position of the lower steering wheel traction section (211), the position of the lower horizontal load-carrying section (112) corresponds to the position of the lower horizontal traction section (212), the position of the upper inclined load-carrying section (113) corresponds to the position of the upper inclined traction section (213), the position of the upper horizontal load-carrying section (114) corresponds to the position of the upper horizontal traction section (214), the position of the upper steering wheel load-carrying section (115) corresponds to the position of the upper steering wheel load-carrying section (115), the position of the upper redirection load-carrying section (116) corresponds to the position of the upper redirection traction section (216), the position of the lower inclined load-carrying section (117) corresponds to the position of the lower inclined traction section (217), and the position of the lower redirection load-carrying section (118) corresponds to the position of the lower redirection traction section (218); When the load-carrying ring body comprises two load-carrying tracks (110) and two load-carrying cables (120), the load-carrying track (110) comprises the lower steering wheel load-carrying section (111), at least part of the lower horizontal load-carrying section (112), at least part of the upper horizontal load-carrying section (114), the upper steering wheel load-carrying section (115), the upper redirection load-carrying section (116), and the lower redirection load-carrying section (118); and the load-carrying cable (120) comprises the upper inclined load-carrying section (113) and the lower inclined load-carrying section (117). When the load ring body comprises a load track (110) in a ring structure, the load track (110) comprises a lower deflection wheel load section (111), a lower horizontal load section (112), an upper inclined load section (113), an upper horizontal load section (114), an upper deflection wheel load section (115), an upper change direction load section (116), a lower inclined load section (117), and a lower change direction load section (118), and the load structure (100) further comprises a plurality of track support frames (130) for being fixed on the ground, and at least part of the track support frames (130) simultaneously support the upper inclined load section (113) and the lower inclined load section (117).

8. The twin drive bulk material conveying system of claim 1, wherein, The driving device (400) is connected with the winding drum (610) and the deflection wheel (620) of the same deflection structure; The deflection structure further comprises a shaft coupling; in the same deflection structure, the winding drum (610) and the deflection wheel (620) are coaxially arranged and connected with the shaft coupling; The traction cable (210) is connected with a tensioning device; the tensioning device comprises one or more of a weight type structure, a hydraulic type structure, and a lead screw type structure; The double-drive bulk material conveying system further comprises a transfer device; the first deflection structure (600) is located at a low altitude position, and the second deflection structure (700) is located at a high altitude position opposite to the low altitude position; the low altitude position and the high altitude position are both provided with the transfer device and the stockyard; the transfer device is configured to reciprocatingly carry bulk material between the conveying belt (310) and the stockyard.

9. A dual drive bulk material conveying gravity flow energy storage system characterized by, The double-drive bulk material conveying system comprises the double-drive bulk material conveying system according to any one of claims 1-8, and further comprises a power generation device (500); The first deflection structure (600) is located at a low altitude position, and the second deflection structure (700) is located at a high altitude position opposite to the low altitude position; When the conveying belt (310) rotates towards the first direction, the loaded bulk material can be successively conveyed to the high altitude position, so as to convert electric energy into gravitational potential energy for storage; The power generation device (500) is connected with the first deflection structure (600) and / or the second deflection structure (700); under the action of gravity, the conveying belt (310) loaded with bulk material drives the conveying belt (310) and the carrier vehicle (320) to move along a second direction and successively convey the bulk material to the low altitude position to form a continuous gravitational flow, and simultaneously drives the first deflection structure (600) and the second deflection structure (700) to operate along the second direction, so as to drive the power generation device (500) to generate electricity, to convert the continuous gravitational flow into a continuous energy flow, thereby realizing continuous discharge; wherein the first direction is opposite to the second direction.

10. The dual drive bulk conveying gravitational flow energy storage system of claim 9, wherein, The deflection structure further comprises a shaft coupling; in the same deflection structure, the winding drum (610) and the deflection wheel (620) are coaxially arranged and connected with the shaft coupling; The driving device (400) is connected with the shaft coupling; The power generation device (500) is connected with the shaft coupling; The driving device (400) and the power generation device (500) are motor generators, or the driving device (400) and the power generation device (500) are independent of each other.

11. A method of energy storage, characterized by, The method is suitable for the double-driven bulk material conveying gravity flow energy storage system according to any one of claims 9 and 10, and the method comprises the following steps: When the energy storage is charged, the bulk material is located at a low altitude, the driving device (400) is driven by electric energy, the first steering structure (600) and the second steering structure (700) are driven to rotate in a first direction, the traction rope (210) and the conveying belt (310) are driven to run in the first direction, all the carrier vehicles (320) are driven to walk along the load-carrying annular body, and the conveying belt (310) is driven to walk synchronously, the bulk material is loaded on the conveying belt (310) in succession, is conveyed to a high altitude along the load-carrying annular body in succession and is unloaded, and electric energy is converted into gravitational potential energy and stored; When the energy storage is discharged, the bulk material is located at a high altitude, the bulk material is loaded on the conveying belt (310) in succession and is conveyed to the low altitude under the action of gravity, the conveying belt (310) and the carrier vehicles (320) are driven to move in a second direction and convey the bulk material to the low altitude in succession and form a continuous gravity flow, the first steering structure (600) and the second steering structure (700) are driven to run in the second direction, the power generation device (500) is continuously powered to convert the continuous gravity flow into a continuous energy flow, and the gravitational potential energy is converted into continuous electric energy.

12. The method of claim 11, wherein, The advancing speed and the amount of the bulk material are adjusted in real time according to requirements, the size of the gravity flow is changed, the energy flow is adjusted as required, and the functions of "slow charging and fast discharging" or "charging and discharging as required" are realized. The number of the double-driven bulk material conveying gravity flow energy storage systems is multiple, multiple double-driven bulk material conveying gravity flow energy storage systems are installed side by side in a horizontal direction according to the terrain, and / or multiple double-driven bulk material conveying gravity flow energy storage systems are stacked in a vertical direction according to the terrain.

Images