Lower bin type for gravity energy storage system and optimization design method of lower bin type

Abstract

The invention discloses a lower bin type for a gravity energy storage system and an optimization design method of the lower bin type, a lower bin comprises a buffer area roadway connected with a lifting channel, a conveyor used for transporting heavy blocks is arranged in the buffer area roadway, and the buffer area roadway is provided with a buffer position used for temporarily storing the heavy blocks; the end, far away from the lifting channel, of the cache region roadway is connected with a main transportation roadway, a plurality of sub transportation roadways are connected in parallel in the length direction of the main transportation roadway, and the sub transportation roadways are connected through sub vehicle transfer roadways; a transportation sub-vehicle for transporting heavy blocks and a heavy block storage rack are arranged in the transportation sub-roadway; a main transport vehicle for transporting heavy blocks or transporting a secondary transport vehicle carrying the heavy blocks is arranged in the main transport roadway; and a transfer mother vehicle for transporting the transportation son vehicles among different transportation son roadways is arranged in the son vehicle transfer roadway. According to the scheme, the total path, the total time, the total energy consumption and the construction cost of weight block transportation are reduced, and the charging and discharging efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gravity energy storage power generation, and specifically relates to a lower bin type for a gravity energy storage system and an optimization design method thereof. Background Art

[0002] As a new energy storage solution, the promotion of gravity energy storage projects has gradually increased, and it is expected to usher in explosive growth in the next two years. As a commercial and engineered power project, the key to the success of gravity energy storage projects lies in the efficiency of power conversion. Under the condition of a certain total system capacity, it depends on the energy consumption of each subsystem; secondly, the cost of building the lower warehouse accounts for a large proportion of the cost of the shaft-type gravity energy storage project, which can reach more than 15%. Under the condition of a certain weight block, the present invention aims to find a type of lower warehouse with low energy consumption and low construction cost during transportation.

[0003] Gravity energy storage is a new energy storage solution, and there is no production case in China. The first gravity energy storage project in China is under construction. Based on vertical shaft (shaft) energy storage, the height difference between the vertical shaft and the vertical shaft is used as a conveying channel for energy storage heavy blocks. There are no actual engineering application cases at home and abroad, but there are several patents. For example, the patents "Composite Energy Storage System Based on Deep Wells" and "An Automatic Connection and Parking System for Multiple Objects Gravity Energy Storage" applied by the Institute of Electrical Engineering of the Chinese Academy of Sciences, and the patent "A Gravity Energy Storage System Based on Mine Shaft Shaft, Hoisting and Transportation System" applied by China Coal Energy Research Institute Co., Ltd. all use vertical shafts as energy storage solutions, but none of the above patents involve research on the storage method of heavy blocks, and the lower warehouse part will have problems of high construction cost and low efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a lower warehouse type for a gravity energy storage system and an optimization design method thereof, so as to solve the problem that the lower warehouse structure of the existing solution is poor, which leads to high cost and low efficiency, fill the technical gap of lower warehouse construction in the field of gravity energy storage system, and realize a lower warehouse layout with relatively short path, relatively low energy consumption and low civil engineering cost, that is, a heavy block storage method.

[0005] According to the technical solution of the present invention, the present invention provides a lower warehouse type for a gravity energy storage system, the gravity energy storage system includes a lifting channel, the lower warehouse includes a buffer zone lane connected to the lifting channel, a conveyor for transporting heavy blocks is provided in the buffer zone lane and has a buffer position for temporarily storing heavy blocks; the buffer zone lane is connected to a main transport lane at one end away from the lifting channel, and a plurality of transport sub-lanes are connected in parallel at a plurality of different positions in the length direction of the main transport lane, and the plurality of transport sub-lanes are connected through a sub-carriageway transfer lane; a transport sub-lane for transporting heavy blocks and a heavy block storage rack for storing heavy blocks are provided in the transport sub-lane; a transport mother car for transporting heavy blocks or transport sub-lanes carrying heavy blocks is provided in the transport main lane; a transfer mother car for transporting sub-lanes between different transport sub-lanes is provided in the sub-carriageway.

[0006] Furthermore, in the transport sub-lane, a heavy object block storage rack has two rows of support bodies arranged along the length direction, and a sub-vehicle track for the transport sub-vehicle to travel is arranged between the two rows of support bodies.

[0007] Furthermore, two heavy object block storage racks and two groups of sub-vehicle tracks are arranged side by side in one transport sub-lane.

[0008] Furthermore, a mother vehicle track for the mother vehicle to travel on is arranged along the length direction in the main transport lane; for the mother vehicle used to transport the sub-vehicle, a sub-vehicle transport bearing track for the sub-vehicle to travel on is arranged on the mother vehicle.

[0009] Furthermore, a transfer track for the transfer mother vehicle is provided in the sub-vehicle transfer lane; at the connection between the sub-vehicle transfer lane and each transport sub-lane, the end of the sub-vehicle track extends into the sub-vehicle transfer lane to form an extension part of the sub-vehicle track; a sub-vehicle transfer bearing track for the transport sub-vehicle is provided on the transfer mother vehicle, and the sub-vehicle transfer bearing track can be connected with the extension part of the sub-vehicle track.

[0010] Furthermore, two rows of conveyors are arranged side by side in a buffer zone lane to form two loading and unloading channels.

[0011] Furthermore, a maintenance area is provided at one or both ends of the main transport lane in the length direction; and / or a hoisting beam is provided above the sub-vehicle transfer lane, and a hoisting device is connected to the hoisting beam.

[0012] Furthermore, the inner sides of the cache area tunnel, the main transport tunnel, the transport sub-tunnel and the sub-vehicle transfer tunnel are all provided with a concrete support layer; the top of the cache area tunnel, the main transport tunnel, the transport sub-tunnel and / or the sub-vehicle transfer tunnel is an upwardly arched dome.

[0013] Furthermore, pedestrian passages are arranged along the length direction in the buffer area lanes, the main transport lanes, the transport sub-lanes and / or the sub-vehicle transfer lanes.

[0014] According to the technical solution of the present invention, the present invention also provides an optimization design method for the lower bin type of a gravity energy storage system, comprising the following contents: The lower warehouse type for the gravity energy storage system of the present invention is adopted; the heavy objects are stored in one or more rows in the transport sub-laneway, the heavy objects are in the form of a cuboid, and the cross section of the transport sub-laneway is in the form of a rectangle with a dome on the top; the area ratio of the heavy objects in the cross section of the transport sub-laneway is defined as the cross-sectional area ratio of the heavy objects, and the higher the cross-sectional area ratio of the heavy objects, the greater the storage efficiency and the lower the required lower warehouse construction cost; The cross-sectional area ratio of the weight block is calculated using the following formula: K = nab / (dh + πdc / 4); Where K is the cross-sectional area ratio of the weight block; n is the number of storage columns of the weight block in a lane; a is the width of a weight block; b is the height of a weight block; d is the width of the lane rectangle, d≥na+(n-1)m, m is the minimum spacing between two adjacent columns of weight blocks; h is the height of the lane rectangle; c is the height of the dome; Based on this calculation and analysis, the optimal structural solution for the lower warehouse is obtained.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1. The lower warehouse type and optimization design method for the gravity energy storage system of the present invention are considered from the perspective of gravity energy storage engineering application. The designed heavy block storage method will reduce the total path, total time and total energy consumption of heavy block transportation compared with the conventional rectangular storage form. At the same time, it is equipped with an automatic loading and unloading system to realize the continuous, stable and low-energy operation of the heavy blocks in the upper warehouse, thereby improving the charging and discharging efficiency of the entire energy storage system.

[0016] 2. The lower warehouse type and optimization design method for the gravity energy storage system of the present invention can adjust the operating parameters of each device according to the needs of the project, the unit weight, quantity and shape of the weight blocks, and adjust the most suitable storage path, thereby configuring the storage plan required by the project.

[0017] 3. The purpose of the lower warehouse system of gravity energy storage is to store heavy blocks, and requires low energy consumption and low construction cost during the storage process. Compared with the existing technical solutions (patents), the solution of the present invention is the most suitable storage solution for the gravity energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall top view of the lower bin according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic cross-sectional structure diagram of a buffer zone lane according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic cross-sectional structure diagram of a main transport lane according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of a transport sub-tunnel according to an embodiment of the present invention.

[0022] Figure 5 yes Figure 4 Schematic diagram of the dimensioning of the transport sub-tunnel structure shown.

[0023] Figure 6 It is a schematic cross-sectional structural diagram of a sub-vehicle transfer lane according to an embodiment of the present invention.

[0024] Description of reference numerals in the accompanying drawings: 1. Lifting channel; 2. Buffer area tunnel; 21. Conveyor; 22. Cache position; 23. Buffer area tunnel concrete support layer; 24. Buffer area tunnel pedestrian passage; 3. Transport main tunnel; 31. Transport mother vehicle; 32. Maintenance area; 33. Transport main tunnel concrete support layer; 34. Transport main tunnel pedestrian passage; 4. Transport sub-tunnel; 41. Transport sub-trolley; 42. Heavy block storage rack; 43. Transport sub-tunnel concrete support layer; 44. Transport sub-tunnel pedestrian passage; 5. Sub-trolley transfer tunnel; 51. Transfer mother vehicle; 52. Sub-trolley track extension; 53. Sub-trolley transfer bearing track; 54. Hoisting beam; 55. Hoisting equipment; 56. Sub-trolley transfer tunnel concrete support layer; 6. Heavy blocks. DETAILED DESCRIPTION

[0025] The present invention provides a lower warehouse type for a gravity energy storage system and an optimization design method thereof, which solves the problem that the lower warehouse structure of the existing solution is poor, resulting in high cost and low efficiency, fills the technical gap of lower warehouse construction in the field of gravity energy storage system, and realizes a lower warehouse layout with a relatively short path, relatively low energy consumption and low civil engineering cost, namely, a heavy object block storage method.

[0026] Gravity energy storage achieves the cyclic conversion of electrical energy, kinetic energy and potential energy by lifting and falling heavy objects, thereby achieving the storage and release of electrical energy. Figure 1 , Figure 2According to an embodiment of the present invention, a lower warehouse type is used for a gravity energy storage system. The gravity energy storage system includes a lifting channel 1, an upper warehouse, a lower warehouse, etc. The lifting channel 1 is, for example, a vertical shaft or a slope. The heavy object blocks are lifted and lowered in the lifting channel 1 to perform energy conversion. An upper warehouse is provided above the lifting channel 1 (in high altitude areas), and a lower warehouse is provided below the lifting channel 1 (in low altitude areas); the basic structure and principle related to gravity energy storage are existing technologies and will not be elaborated herein; the lower warehouse type of this scheme can be applied to various gravity energy storage systems such as vertical shaft gravity energy storage and slope gravity energy storage.

[0027] The lower warehouse of the present invention is particularly suitable for a vertical shaft gravity energy storage system with one shaft and two machines, which mainly includes four parts: a buffer area, a main transportation lane, a transportation sub-lane, and a sub-car transfer lane. Among them, "one shaft and two machines" means using one vertical shaft as a lifting channel for two gravity energy storage units. More specifically, each gravity energy storage unit has a lifting container, a wire rope, an engine, an electric motor or an electric generator, etc. The lifting container is used to load heavy objects for lifting, and the lifting containers of the two gravity energy storage units share a vertical shaft. Preferably, each gravity energy storage unit has two lifting containers and is connected to both ends of the same wire rope. When one of the lifting containers is at the height of the lower warehouse, the other is at the height of the upper warehouse, and vice versa; and then the two gravity energy storage units have a total of four lifting containers, all located in one vertical shaft; further, the four lifting containers are arranged in a field shape, which has a high space utilization rate.

[0028] The lower warehouse includes a buffer zone lane 2 connected to the lifting channel 1, and a conveyor 21 for transporting heavy blocks 6 is provided in the buffer zone lane 2, and a buffer position 22 for temporarily storing heavy blocks 6 is formed, as well as a loading and unloading channel for loading, unloading and transporting heavy blocks. The conveyor 21 is preferably, for example, a roller conveyor fixed to the ground (a machine that carries blocks with the help of steel rollers). For example, the conveyor 21 is arranged in sections along the length direction of the buffer zone lane 2, for example, each buffer position 22 is a conveyor 21, and the conveyors 21 are connected to each other, and can continuously transport heavy blocks to the lifting channel entrance, and can also temporarily park heavy blocks on a buffer position 22; because the conveyors 21 are multiple and relatively independent, for example, when a rear conveyor is used as a buffer position 22 and a heavy block is placed, the front conveyor 21 can also perform the work of handing over the heavy block to the transport mother vehicle 31 and moving the heavy block. In some optional embodiments, the buffer position 22 is independent of the conveyor 21, for example, it is located next to the conveyor 21, and the conveyor 21 can transport the heavy objects to the buffer position 22 for temporary storage, and can also transport the temporarily stored heavy objects to the conveyor 21 or directly to the entrance of the lifting passage through the action of the buffer position 22 and / or the conveyor 21. In short, the buffer area lane 2 can be used to transport and store heavy objects for a short time, forming a buffer between the lifting system and the storage system, and providing flexible deployment space for the operation of the system. For example, one or more heavy objects transported to the buffer area can stay here temporarily and wait for the corresponding components of the subsequent work to be in place, thereby effectively improving the transportation efficiency, stability and safety of the energy storage system.

[0029] The buffer zone lane 2 is connected to the main transport lane 3 at one end away from the lifting channel 1, and multiple transport sub-lanes 4 are connected in parallel at multiple different positions in the length direction of the main transport lane 3. The multiple transport sub-lanes 4 (for example, at one end away from the main transport lane 3) are connected through the sub-carriage transfer lane 5. In other words, the main transport lane 3 and the sub-carriage transfer lane 5 are connected through the transport sub-lane 4 to form a network structure. The transport sub-lane 4 is provided with a transport sub-carriage 41 for transporting heavy blocks 6 and a heavy block storage rack 42 for storing heavy blocks 6. The main transport lane 3 is provided with a transport mother car 31 for transporting heavy blocks 6 or transporting a transport sub-carriage 41 carrying heavy blocks 6. The sub-carriage transfer lane 5 is provided with a transfer mother car 51 for transporting the transport sub-carriage 41 between different transport sub-lanes 4. The transport sub-carriage 41, the transport mother car 31, and the transfer mother car 51 preferably use heavy-duty RGV trolleys (rail-guided vehicles). At least a lifting device is arranged on the upper part of the transport vehicle 41 to store and extract heavy blocks; the relevant functional structure and control method are existing technologies and will not be described in detail here.

[0030] When the lower warehouse of the present invention is working, the transport sub-trolley 41 can move along the length direction of the transport sub-lane 4 to carry, store and retrieve the heavy blocks 6. When the transport sub-trolley 41 travels to one end close to the main transport lane 3, it transfers the heavy blocks 6 to the transport mother car 31; or in some embodiments, the transport sub-trolley 41 carrying the heavy blocks 6 travels on / off the transport mother car 31 as a whole. The transport mother car 31 can move along the length direction of the main transport lane 3, and can stop at the lane entrance of any transport sub-lane 4 and the lane entrance of the buffer zone lane 2 on the way to transfer the heavy blocks. The transfer mother car 51 can move along the length direction of the sub-trolley transfer lane 5, and can stop at the lane entrance of any transport sub-lane 4 on the way, so that the transport sub-trolley 41 can be moved onto the transfer mother car 51, and the transfer mother car 51 can transfer the transport sub-trolley 41 on it to other transport sub-lanes 4. Such an arrangement can achieve a smaller number of transport vehicles, and there is no need to equip each transport sub-alley 4 with at least one transport sub-alley 41. For example, after the heavy blocks 6 in a transport sub-alley 4 are emptied, the transport sub-alley 41 in the transport sub-alley 4 can be moved to other transport sub-alleys 4 for transportation via the transfer mother vehicle 51, which increases equipment utilization and is more economical.

[0031] More specifically, Figure 1 , Figure 2 In the preferred embodiment shown, two rows of conveyors 21 are arranged side by side in a buffer zone tunnel 2 to form two loading and unloading channels; thereby being able to accommodate more heavy blocks and having a higher buffering capacity. Especially for the one-well-two-machine solution, the two loading and unloading channels correspond to two lifting container positions respectively, and the loading and unloading transportation process is more efficient. Furthermore, it is preferred to arrange the buffer zone tunnel 2 in the middle of the length direction of the main transport tunnel 3, and the transport sub-tunnels 4 are also distributed on both sides of the middle. At least two transport mother vehicles 31 are provided in the main transport tunnel 3, which can perform transportation work independently. In some embodiments, a buffer zone tunnel 2 is connected to one side of the lifting channel 1, and a buffer zone tunnel 2 is also connected to the other side of the lifting channel 1. For example Figure 1 The structure is shown as being symmetrical up and down; and the network structure formed by the lanes is arranged orthogonally in the horizontal and vertical directions; in other feasible embodiments, the buffer lanes 2 are arranged as a plurality of lanes distributed circumferentially outside the lifting channel 1, or a plurality of lanes arranged in parallel, the network structure formed by the lanes is outwardly divergent, the lanes are curves or broken lines, etc., all of which do not deviate from the inventive concept of the present invention. Optionally, a buffer lane pedestrian passage 24 is arranged along the length direction on the inner side walls on both sides of each buffer lane 2, so as to allow safe walking in the buffer lane 2 during construction and maintenance.

[0032] See also Figure 3, a mother vehicle track for the mother transport vehicle 31 to travel is provided in the main transport lane 3 along the length direction; preferably, two tracks are arranged to jointly support / guide one (one row) mother transport vehicle 31. For the mother transport vehicle 31 used to transport the transport sub-vehicle 41, a sub-vehicle transport bearing track for the transport sub-vehicle 41 to travel is provided on the mother transport vehicle 31, and the transport sub-vehicle 41 can travel on / off the mother transport vehicle 31 along the track. Optionally, a main transport lane pedestrian passage 34 is arranged on one side of the main transport lane 3. The main transport lane 3 is narrow in width and can basically only accommodate one row of mother transport vehicles 31 and heavy blocks 6, so that the space utilization rate is high, and it is convenient for the heavy blocks 6 to move to both sides of the main transport lane 3 to enter the buffer lane 2 or the transport sub-lane 4. Please refer to Figure 1 A maintenance area 32 is provided at one or both ends of the main transport lane 3 in the length direction to park the transport vehicle 31 and the like during maintenance.

[0033] See also Figure 4 In the transport sub-lane 4, a heavy object block storage rack 42 has two rows of support bodies arranged along the length direction, so that the heavy object blocks 6 can be placed on the support bodies, and a sub-trolley track for the transport sub-trolley 41 to travel is arranged between the two rows of support bodies, and the transport sub-trolley 41 is located between the two rows of support bodies and below the placement position of the heavy object blocks 6. Preferably, two heavy object block storage racks 42 and two groups of sub-trolley tracks are arranged side by side in a transport sub-lane 4; each group of sub-trolley tracks is two parallel tracks. A transport sub-lane pedestrian passage 44 is formed between the two heavy object block storage racks 42 (between the two groups of sub-trolley tracks), and the width of the transport sub-lane pedestrian passage 44 is, for example, 800mm. This method of storing / transporting two routes of heavy object blocks 6 in parallel in one lane has the highest space utilization rate, and the specific calculation method will be explained later. There are multiple transport sub-lanes 4, for example, arranged in parallel, and the interval between adjacent transport sub-lanes 4 is, for example, 15m.

[0034] See also Figure 6, a transfer track for the transfer mother vehicle 51 to travel is provided in the sub-vehicle transfer lane 5, for example, two parallel tracks. At the connection between the sub-vehicle transfer lane 5 and each transport sub-lane 4, the end of the sub-vehicle track extends into the sub-vehicle transfer lane 5 to form a sub-vehicle track extension part 52; of course, for example, there is a supporting structure below the sub-vehicle track extension part 52. A sub-vehicle transfer bearing track 53 for the transport sub-vehicle 41 to travel is provided on the transfer mother vehicle 51, and the sub-vehicle transfer bearing track 53 can be connected with the sub-vehicle track extension part 52; that is, when the transfer mother vehicle 51 travels to the lane entrance of the transport sub-lane 4, the sub-vehicle transfer bearing track 53 is connected with the corresponding sub-vehicle track extension part 52 (there is a small gap between the two that does not affect the function), so that the transport sub-vehicle 41 can travel on / off the transfer mother vehicle 51. Furthermore, a lifting beam 54 is provided above the sub-trolley transfer lane 5, and a lifting device 55 is connected to the lifting beam 54. The lifting device 55 is, for example, movably provided on the lifting beam 54, and the lifting device 55 is used for assembling the lower warehouse equipment.

[0035] For the shaft-type gravity energy storage system, the lower warehouse is usually located underground, and the construction cost of the underground space is higher and more requirements are required, so it is particularly necessary to pay attention to the design of the lower warehouse type. Preferably, the inner side of the buffer area lane 2, the main transport lane 3, the transport sub-lane 4 and the sub-car transfer lane 5 are all provided with a concrete support layer (for example, including the buffer area lane concrete support layer 23, the main transport lane concrete support layer 33, the transport sub-lane concrete support layer 43, and the sub-car transfer lane concrete support layer 56) to ensure the requirements for the structure and surface. In addition, the cross-section of the buffer area lane 2, the main transport lane 3, the transport sub-lane 4 and / or the sub-car transfer lane 5 is rectangular, and the top is an upwardly arched dome, which matches the vertical rectangular weight block 6 (and this kind of weight block 6 matches the shaft-type gravity energy storage, especially the gravity energy storage system of one shaft and two machines), and the arc-shaped dome structure provides better mechanical properties. Pedestrian passages are arranged along the length direction in the cache lane 2, the transport main lane 3, the transport sub-lane 4 and / or the sub-vehicle transfer lane 5 (for example, including the cache lane pedestrian passage 24, the transport main lane pedestrian passage 34, and the transport sub-lane pedestrian passage 44). The pedestrian passages may be made of steel structure or concrete structure.

[0036] Regarding the specific design of the roadway, the present invention provides an optimization design method for the lower warehouse type of the gravity energy storage system, especially considering the construction cost comparison, which specifically includes the following contents: The lower warehouse type for the gravity energy storage system of the present invention is adopted; the heavy objects are stored in one or more rows in the transport sub-lane, such as Figure 5As shown, the heavy object block is in the shape of (or approximately in the shape of) a cuboid, and the cross section is in the shape of (or approximately in the shape of) a rectangle, and the cross section of the transport sub-lane is in the shape of (or approximately in the shape of) a rectangle with a dome on the top; the area ratio of the heavy object block in the cross section of the transport sub-lane is defined as the cross-sectional area ratio of the heavy object block, and the higher the cross-sectional area ratio of the heavy object block, the greater the storage efficiency and the smaller the required lower warehouse construction cost; The cross-sectional area ratio of the weight block can be approximately calculated using the following formula: K = nab / (dh + πdc / 4); In the formula, K is the proportion of the cross-sectional area of ​​the weight block; n is the number of storage columns of the weight block in a lane, n=1,2,3,…; a is the width of a weight block; b is the height of a weight block; d is the width of the lane rectangle, d≥na+(n-1)m, m is the minimum spacing distance between two adjacent columns of weight blocks (for example, it can be about 0.8 meters); h is the height of the lane rectangle; π is pi; c is the height of the dome; it can be understood that the above parameters can be selected as approximate values ​​of the shape (for example, the dome can be approximated as a semi-ellipse), and factors such as the mechanical strength of the structure also need to be considered in the design.

[0037] Based on this calculation and analysis, the optimal structural solution for the lower warehouse is obtained.

[0038] For example, taking the weight block size of 2m*2m*5m as an example, the calculation results of the three forms of single weight block (n=1), double weight block (n=2), and triple weight block (n=3) in the sub-tunnel section are as follows: Single heavy block tunnel: tunnel width 3m, height 5m, dome height 1.5m, area about 18.5m²; The cross-sectional area ratio of the heavy object = 10 / 18.5 = 54%.

[0039] Double block tunnel: tunnel width 5.2m, height 5m, dome height 1.5m, area about 33m²; The cross-sectional area ratio of the heavy object = 20 / 33 = 60.6%.

[0040] Triple-mass tunnel: tunnel width 8m, height 5m, dome height 2.5m, area approximately 52m²; The cross-sectional area ratio of the heavy object = 30 / 52 = 57.7%.

[0041] It can be seen that the construction cost of the double block layout of the sub-lane is the lowest, that is, Figure 4 The structure shown; and, for example Figure 2 Compared with the structure shown in the figure, only one transport sub-lane pedestrian passage 44 is set in the middle, which has a higher cross-sectional area ratio of heavy blocks; thus, it helps to increase the total storable amount of heavy blocks 6 while ensuring the requirements of structural strength, operational stability, etc., and improve the ability and flexibility of the gravity energy storage system to continuously store and release energy.

[0042] In summary, the lower warehouse type and its optimized design method for the gravity energy storage system of the present invention are considered from the perspective of gravity energy storage engineering application. The designed storage method of heavy objects will reduce the total path, total time and total energy consumption of heavy object block transportation compared with the conventional rectangular storage form. At the same time, it is equipped with an automatic loading and unloading system to achieve continuous, stable and low-energy operation of heavy objects in the upper warehouse, thereby improving the charging and discharging efficiency of the entire energy storage system. The lower warehouse type and its optimized design method for the gravity energy storage system of the present invention can adjust the operating parameters of each device according to the needs of the project, according to the unit weight, quantity and shape of the heavy objects, and adjust the most suitable storage path, so as to configure the storage solution required by the project. The purpose of the lower warehouse system of gravity energy storage is to store heavy objects, and it requires low energy consumption and low construction cost during the storage process. Compared with the existing technical solutions (patents), the solution of the present invention is the most suitable storage solution for gravity energy storage systems.

Claims

1. A lower bin type for a gravity energy storage system, the gravity energy storage system comprising a lifting channel (1), characterized in that: The lower warehouse comprises a buffer zone lane (2) connected to the lifting channel (1), wherein the buffer zone lane (2) is provided with a conveyor (21) for transporting heavy blocks (6) and has a buffer position (22) for temporarily storing the heavy blocks (6); the buffer zone lane (2) is connected to a main transport lane (3) at one end away from the lifting channel (1), and a plurality of transport sub-lanes (4) are connected in parallel at a plurality of different positions in the length direction of the main transport lane (3); the plurality of transport sub-lanes (4) are connected to the main transport lane (3) by a sub-carriage The transport lane (5) is connected to the transport lane (5); the transport lane (4) is provided with a transport sub-vehicle (41) for transporting heavy blocks (6) and a heavy block storage rack (42) for storing the heavy blocks (6); the main transport lane (3) is provided with a transport mother vehicle (31) for transporting heavy blocks (6) or transporting a transport sub-vehicle (41) carrying heavy blocks (6); and the sub-vehicle transfer lane (5) is provided with a transfer mother vehicle (51) for transporting the transport sub-vehicle (41) between different transport sub-lanes (4).

2. The lower bin type for the gravity energy storage system according to claim 1, characterized in that: In the transport sub-lane (4), a heavy object block storage rack (42) has two rows of support bodies arranged along the length direction, and a sub-vehicle track for the transport sub-vehicle (41) to travel is arranged between the two rows of support bodies.

3. The lower bin type for the gravity energy storage system according to claim 2, characterized in that: Two heavy object block storage racks (42) and two sets of sub-vehicle tracks are arranged side by side in a transport sub-lane (4).

4. The lower bin type for the gravity energy storage system according to claim 1, characterized in that: A mother vehicle track for a mother vehicle (31) to travel is provided in the main transport lane (3) along the length direction; for a mother vehicle (31) used to transport a sub-vehicle (41), a sub-vehicle transport bearing track for the sub-vehicle (41) to travel is provided on the mother vehicle (31).

5. The lower bin type for the gravity energy storage system according to claim 2, characterized in that: A transfer track for the transfer mother vehicle (51) to travel is provided in the sub-vehicle transfer lane (5); at the connection between the sub-vehicle transfer lane (5) and each transport sub-laneway (4), the end of the sub-vehicle track extends into the sub-vehicle transfer lane (5) to form a sub-vehicle track extension part (52); a sub-vehicle transfer bearing track (53) for the transport sub-vehicle (41) to travel is provided on the transfer mother vehicle (51), and the sub-vehicle transfer bearing track (53) can be connected to the sub-vehicle track extension part (52).

6. The lower bin type for a gravity energy storage system according to any one of claims 1 to 5, characterized in that: Two rows of conveyors (21) are arranged side by side in a buffer zone lane (2) to form two loading and unloading channels.

7. The lower bin type for a gravity energy storage system according to any one of claims 1 to 5, characterized in that: A maintenance area (32) is provided at one or both ends of the main transport lane (3) in the longitudinal direction; and / or a lifting beam (54) is provided above the sub-vehicle transfer lane (5), and a lifting device (55) is connected to the lifting beam (54).

8. The lower bin type for a gravity energy storage system according to any one of claims 1 to 5, characterized in that: The inner side surfaces of the buffer zone tunnel (2), the main transport tunnel (3), the transport sub-tunnel (4) and the sub-vehicle transfer tunnel (5) are all provided with concrete support layers; the tops of the buffer zone tunnel (2), the main transport tunnel (3), the transport sub-tunnel (4) and / or the sub-vehicle transfer tunnel (5) are domes that arch upwards.

9. The lower bin type for a gravity energy storage system according to any one of claims 1 to 5, characterized in that: Pedestrian passages are provided along the length direction in the buffer area lane (2), the main transport lane (3), the transport sub-lane (4) and / or the sub-vehicle transfer lane (5).

10. A method for optimizing the design of the lower compartment type of a gravity energy storage system, characterized in that: It includes the following: The lower warehouse type for the gravity energy storage system according to any one of claims 1 to 9 is adopted; the heavy objects are stored in one or more rows in the transport sub-lane, the heavy objects are rectangular, and the cross-section of the transport sub-lane is a rectangle with a dome on the top; the area ratio of the heavy objects in the cross-section of the transport sub-lane is defined as the cross-sectional area ratio of the heavy objects, and the higher the cross-sectional area ratio of the heavy objects, the greater the storage efficiency and the smaller the required lower warehouse construction cost; The cross-sectional area ratio of the weight block is calculated using the following formula: K = nab / (dh + πdc / 4); Where K is the cross-sectional area ratio of the weight block; n is the number of storage columns of the weight block in a lane; a is the width of a weight block; b is the height of a weight block; d is the width of the lane rectangle, d≥na+(n-1)m, m is the minimum spacing between two adjacent columns of weight blocks; h is the height of the lane rectangle; c is the height of the dome; Based on this calculation and analysis, the optimal structural solution for the lower warehouse is obtained.

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