Vertical circulation type gravity energy storage system based on linear motor

Abstract

The invention belongs to the technical field of energy storage, and particularly relates to a vertical circulation type gravity energy storage system based on a linear motor, the vertical circulation type gravity energy storage system comprises a circulation shaft, a carrying platform system and an energy storage system, the circulation shaft comprises a heavy object shaft, a no-load shaft and a horizontal channel, and a secondary switching disc is arranged at the joint of the heavy object shaft and the horizontal channel and the joint of the no-load shaft and the horizontal channel; the heavy well, the no-load well, the horizontal channel and the secondary switching disc are each provided with a secondary driving side, and each secondary driving side comprises a first rail set and a linear motor secondary; the platform deck system comprises a plurality of platform decks, the platform decks are used for bearing heavy objects, primary switching discs are arranged on the side faces of the platform decks, primary driving sides are arranged on the platform decks and the primary switching discs, and each primary driving side comprises a second track set and a linear motor primary; the energy storage system includes an upper storage bin, a lower storage bin, and a loading and unloading zone. The energy storage capacity expansion mode is simple, the expansion cost is low, the energy storage capacity configuration is flexible, and the energy storage efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage, and in particular relates to a vertical circulation gravity energy storage system based on a linear motor. Background Art

[0002] Vigorously developing and utilizing renewable energy sources such as photovoltaics and wind power has become an inevitable choice. However, the inherent intermittent, volatile and uncertain characteristics of renewable energy will have an impact on the power grid and affect the stability of the power grid. As an important tool for new energy electricity, energy storage technology can increase the proportion of renewable energy consumption, reduce the phenomenon of "abandoning wind" and "abandoning light", reduce the impact on the power grid, and improve the flexibility and safety of the power system. New energy storage technologies mainly include lithium-ion batteries, compressed air energy storage, flywheel energy storage, gravity energy storage, supercapacitor energy storage and superconducting energy storage. Among them, gravity energy storage has the advantages of flexible site selection, large energy storage capacity, long cycle life, high efficiency, fast response and environmental friendliness, and has attracted much attention.

[0003] Gravity energy storage mainly includes slope gravity energy storage and vertical gravity energy storage. The efficiency of slope gravity energy storage is constrained by the slope. Compared with slope gravity energy storage, the site selection of vertical gravity energy storage is more flexible and more applicable. At present, most of the research on vertical gravity energy storage is vertical gravity energy storage technology that lifts heavy objects through winches. The vertical gravity energy storage system that lifts heavy objects through winches has problems such as limited number of lifted heavy objects, limited lifting height, low efficiency, and wire rope lubrication and replacement. In view of the advantages of linear motors such as large thrust, long stroke, and high efficiency. South African scholars have studied and designed a gravity energy storage system based on linear motors. Although the energy storage efficiency is improved, the expansion method of its energy storage capacity is complex and the expansion cost is high. In the existing domestic technology, a linear motor gravity energy storage device for abandoned mines and a coordinated control method of multiple energy storage blocks thereof (application number: 202311611162.4) can meet various power requirements of the power grid through the coordinated control of multiple energy storage blocks. Since the primary of the linear motor and the weight are integrated, the cost of expanding the system energy storage capacity is high; a gravity energy storage and control method based on a permanent magnet linear motor (application number: 202210356158.7) can realize energy storage and power generation by lowering one or more weight blocks to mount on the mover. Since the weight and the mover are connected by a rigid connector, the weight mass is limited by the rigid connector, and there may be safety issues in the energy storage process of large-mass weights; A gravity energy storage system based on linear motors and abandoned mines (application number: 20231407705.0) transports heavy objects through two shafts, realizing the simultaneous operation of multiple cargo compartments. For linear motors, the radius requirements for the turning track are very strict. The heavy objects used for energy storage are generally large in size, and the required turning track radius is also large. Since the connection between the vertical shaft and the ground, and the connection between the two shafts on the ground or at the bottom of the shaft are realized through the turning track, it adds difficulty to the design and construction of the system. At the same time, gravity energy storage uses height difference to realize energy conversion. The system has a long horizontal transportation path on the ground or at the bottom of the shaft, which will increase the energy loss of the system and reduce the energy conversion efficiency of the system.

[0004] Therefore, there is an urgent need for a vertical circulation gravity energy storage system based on linear motors to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned defects in the prior art, the present invention provides a vertical circulation gravity energy storage system based on a linear motor, including a circulation shaft, a platform system and an energy storage system, the circulation shaft including a vertically arranged heavy object shaft and an unloaded shaft, and a plurality of horizontal channels connected to the heavy object shaft and the unloaded shaft, the heavy object shaft and the unloaded shaft are perpendicular to the horizontal channels and form a circulation loop, the heavy object shaft and the unloaded shaft are both located underground, and secondary switching disks are rotatably arranged at the vertical connections between the heavy object shaft and the unloaded shaft and the horizontal channels, and secondary drive sides are arranged in the heavy object shaft, the unloaded shaft and the horizontal channels, and on the secondary switching disk, and the secondary drive side includes a first rail group and a linear motor secondary.

[0006] The platform system includes multiple platforms arranged in a circulating shaft. The platforms are used to carry heavy objects. A primary switching disk is rotatably arranged on the side of the platforms. Both the platforms and the primary switching disk are provided with a primary driving side. The primary driving side includes a second track group and a primary of a linear motor. The second track group and the primary of the linear motor are respectively adapted to the first track group and the secondary of the linear motor.

[0007] The energy storage system includes an upper storage bin, a lower storage bin and a loading and unloading area. The upper storage bin is set on the ground, and the lower storage bin is set underground. Both the upper storage bin and the lower storage bin are provided with a plurality of heavy objects and an automatic stacking device for loading, unloading and stacking heavy objects. The loading and unloading area is set at a horizontal channel.

[0008] Optionally, the carrier includes a shell having a regular polygonal cross-section, and the shell is a hollow structure that penetrates from top to bottom.

[0009] Specifically, the inner cavities of the heavy-load well and the empty-load well are matched with the outer shape of the platform, and the length of the horizontal channel is optimally set to just accommodate one platform.

[0010] Optionally, the first track group in the heavy object shaft and the empty shaft is vertically arranged, and the first track group in the horizontal channel is horizontally arranged, and the first track group includes guide bars and brake guide rails arranged on both sides of the secondary of the linear motor, and two linear guide rails arranged outside the guide bars and brake guide rails.

[0011] Optionally, the second track group includes a collector and a brake arranged on both sides of the primary of the linear motor, and two sets of slide rails arranged outside the collector and the brake, and the collector, the brake and the two sets of slide rails correspond one-to-one to the guide bar, the brake guide rail and the two linear guide rails respectively.

[0012] Optionally, a positioner, a fixer and an anti-falling device are also provided on the shell of the carrier.

[0013] Specifically, each platform is respectively equipped with a positioner to perform a positioning function; multiple sides of the platform are equipped with fixers and anti-falling devices, the fixers are used to fix the platform, and the anti-falling devices can prevent the platform from falling.

[0014] Optionally, the secondary switching disk is also provided with a servo motor, and is driven to rotate by the servo motor.

[0015] Optionally, the area where the secondary switching disk is located is set as a standby area.

[0016] Specifically, when the stage moves to the standby area, the fixture can lock the stage. After the secondary switching disk drives the primary switching disk to rotate 90°, the fixture is unlocked and the stage can start horizontal movement. After the stage completely leaves the standby area, the secondary switching disk is reset.

[0017] Optionally, the energy storage system is also provided with an energy storage battery pack for providing or absorbing energy during the movement of an idle platform.

[0018] Optionally, the internal sections of the heavy-object shaft and the empty shaft are provided with maintenance areas, and a spare area is provided on the ground, and an empty spare platform is parked in the spare area.

[0019] Specifically, when a serious fault occurs on the carrier, it should be locked immediately to prevent accidents; when a minor fault occurs on the carrier, the carrier can be driven slowly into the maintenance area to wait for maintenance, and at the same time, a spare carrier in the spare area can be started to reduce system losses.

[0020] The present invention also includes other components that enable a vertical circulation gravity energy storage system based on a linear motor to be used normally, which are all conventional technical means in the art. In addition, the devices or components not limited in the present invention all adopt conventional technical means in the art.

[0021] The working principle of the present invention is to respectively set the secondary and the first rail group of the linear motor, and the primary and the second rail group of the linear motor on the circulation shaft and the platform system as the secondary driving side and the primary driving side to provide a driving source for the entire system; under the energy storage condition, when wind and solar power generation is sufficient, the system absorbs electric energy, and the linear motor drives the platform to transport the heavy objects from the lower storage bin to the upper storage bin through the heavy object shaft, and the empty platform returns to the lower storage bin through the empty shaft. The main energy conversion form of this process is the conversion of electric energy into gravitational potential energy, which is finally stored in the form of gravitational potential energy; under the energy release condition, when the power load demand is high, the platform transports the heavy objects from the upper storage bin to the lower storage bin through the heavy object shaft, driving the linear motor to generate electricity. The main energy conversion form of this process is the conversion of gravitational potential energy into electric energy, which is finally fed back to the power grid in the form of electric energy. The energy of the empty platforms in the two working conditions is absorbed and provided by the energy storage battery group, and the heavy objects are loaded and unloaded and stacked by the automatic stacking device.

[0022] The beneficial effects of the present invention are:

[0023] (1) The energy storage capacity expansion method of the present invention is simple and the expansion cost is low. The energy storage capacity configuration is flexible. The system expands the energy storage capacity by adding weights. The weight is made of concrete at a low cost. The energy storage capacity expansion method is simple and the expansion cost is low. According to the demand for energy storage capacity, the number of weight blocks is adjusted to achieve flexibility in energy storage capacity configuration.

[0024] (2) The present invention can effectively improve energy storage efficiency. Compared with existing solutions, the present invention proposes a vertical circulation gravity energy storage system based on linear motors, which can reduce mechanical losses during operation. The short-distance horizontal channel reduces the transportation loss of the system and improves energy storage efficiency.

[0025] (3) The present invention can achieve the continuity of output or input power. The present invention proposes a vertical circulation gravity energy storage system based on a linear motor, which can calculate the safety distance between the platforms, reasonably arrange multiple platforms to run simultaneously, and satisfy the system circulation operation by switching the disk to achieve the continuity of output / input power.

[0026] (4) Flexible site selection and simple structure for easy construction.

[0027] (5) The present invention can utilize abandoned mines, abandoned shafts and other facilities for energy storage after simple transformation, thereby realizing the secondary utilization of waste resources, which has very important scientific value and social significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0030] Figure 2 Schematic diagram of the structure of the secondary drive side in Example 1 of the present invention.

[0031] Figure 3 Schematic diagram of the structure of the carrier in Example 1 of the present invention.

[0032] Figure 4 Schematic diagram of the structure of the primary drive side in Example 1 of the present invention.

[0033] Figure 5 This is a schematic diagram of the structure of the primary switching disk in Example 1 of the present invention.

[0034] Figure 6 This is a schematic diagram of the overall structure of Example 2 of the present invention.

[0035] In the figure: 1. heavy object shaft, 2. empty shaft, 3. horizontal channel, 4. carrier, 5. energy storage battery pack, 6. upper storage bin, 7. lower storage bin, 8. loading and unloading area, 9. primary switching disk, 10. secondary switching disk, 11. primary of linear motor, 12. secondary of linear motor, 13. maintenance area, 14. spare area, 15. spare transfer area, 16. anti-fall device, 17. positioner, 18. holder, 19. heavy object, 20. secondary drive side, 21. primary drive side, 22. guide bar, 23. brake guide rail, 24. linear guide rail, 25. collector, 26. brake, 27. slide rail, 28. transformer, 29. power grid, 30. housing. DETAILED DESCRIPTION

[0036] The present invention is described clearly below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description herein is only used to explain the present invention, but is not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.

[0037] Example 1

[0038] like Figure 1As shown, an embodiment of the present invention provides a vertical circulation gravity energy storage system based on a linear motor, including a circulation shaft, a platform system, an energy storage system, a steering system, a linear motor drive system and a safety and maintenance system; the circulation shaft includes a heavy object shaft 1, an empty shaft 2 and a plurality of horizontal channels 3 connected with the heavy object shaft 1 and the empty shaft 2; the platform system includes a plurality of platforms 4 arranged in the circulation shaft; the energy storage system includes an energy storage battery pack 5, an upper storage bin 6, a lower storage bin 7 and a loading and unloading area 8; the steering system includes a primary switching disk 9 and a secondary switching disk 10, and the secondary switching The disk 10 is rotatably arranged at the vertical connection between the heavy object shaft 1 and the empty shaft 2 and the horizontal channel 3, and the primary switching disk 9 is rotatably arranged on the side of the carrier 4; the linear motor drive system includes a linear motor primary 11 and a linear motor secondary 12, the linear motor primary 11 is arranged on the carrier 4 and the primary switching disk 9, and the linear motor secondary 12 is arranged on the circulation shaft and the secondary switching disk 10; the safety and maintenance system includes a maintenance area 13 and a spare area 14, the maintenance area 13 is arranged in sections inside the heavy object shaft 1 and the empty shaft 2, the spare area 14 is arranged on the ground, and an empty spare carrier is parked in the spare area 14. Multiple platforms 4 can run simultaneously in a single heavy object shaft 1 or an empty shaft 2. A first track group is provided in the heavy object shaft 1, the empty shaft 2 and the horizontal channel 3, as well as on the secondary switching disk 10. The first track group and the linear motor secondary 12 together constitute the secondary driving side 20. A standby transfer area 15 is provided at the junction of the heavy object shaft 1, the empty shaft 2 and the horizontal channel 3, which is the area where the secondary switching disk 10 is located. A primary switching disk, an anti-fall device 16, a positioner 17 and a fixer 18 are provided on the platform 4. A second track group and a linear motor primary 11 are provided on the platform 4 and the primary switching disk 9, and the second track group and the linear motor primary 11 together constitute the primary driving side 21. The upper storage bin 6 and the lower storage bin 7 are both provided with multiple heavy objects 19, and automatic stacking devices for loading and unloading and stacking the heavy objects 19.

[0039] like Figure 2 As shown, the first track group in the secondary driving side includes guide bars 22 and brake guide rails 23 arranged on both sides of the linear motor secondary 12, and two linear guide rails 24 arranged on the outside of the guide bars 22 and the brake guide rails 23. The guide bars 22, the brake guide rails 23, the two linear guide rails 24 and the linear motor secondary 12 are arranged at certain working gap intervals; the secondary switching disk 10 is rotated by the first rotating axis and is arranged at the vertical connection between the heavy object shaft 1 and the horizontal channel 3, and at the vertical connection between the empty shaft 2 and the horizontal channel 3, and the first rotating axis is driven to rotate by a servo motor, and the working gap of the components in the secondary driving side 20 on the secondary switching disk 10 is adapted to the working gap of the components in the secondary driving side 20 in the circulation shaft.

[0040] like Figure 3As shown, each carrier 4 includes a shell 30 with a regular hexagonal cross-section, which matches the inner cavity of the heavy object well 1 and the empty well 2.

[0041] like Figure 4 As shown, the second track group in the primary driving side includes a collector 25 and a brake 26 arranged on both sides of the linear motor primary 11, and two groups of slide rails 27 arranged on the outside of the collector 25 and the brake 26. The collector 25, the brake 26, the two groups of slide rails 27 and the linear motor primary 11 are arranged at certain working gap intervals, and the collector 25, the brake 26, the two groups of slide rails 27 and the linear motor primary 11 correspond one by one to the guide bar 22, the brake guide rail 23, the two linear guide rails 24 and the linear motor secondary 12 respectively.

[0042] like Figure 5 As shown, the primary switching disk 9 is rotatably disposed on the housing 30 of the carrier 4 via a second rotating shaft, and the working gap of the components in the primary driving side 21 of the primary switching disk 9 is adapted to the working gap of the components in the secondary driving side 20 of the secondary switching disk 10 .

[0043] The working principle of the present invention is that the switching mode of the platform 4 when it runs from the heavy object shaft 1 or the empty shaft 2 to the horizontal channel 3 is achieved by the secondary switching disk 10 driving the primary switching disk 9 to rotate. The platform 4 in the heavy object shaft 1 runs to the standby transfer area 15, and the fixture 18 locks the platform 4. After the secondary switching disk 10 drives the primary switching disk 9 to rotate 90°, the fixture 18 is unlocked, and the platform 4 starts to move horizontally. After the platform 4 completely leaves the standby transfer area 15, the secondary switching disk 10 is reset.

[0044] In the energy storage condition, the empty carrier 4 is loaded with heavy objects 19 in the horizontal channel 3 of the lower storage bin 7, and runs to the standby transfer area 15 on the lower layer. After the turning is completed, it runs to the standby transfer area 15 on the upper layer through the heavy object shaft 1. After the turning is completed, it enters the horizontal channel 3 of the upper storage bin 6 to unload the heavy objects 19. Subsequently, after the empty carrier 4 completes the turning, it returns to the lower storage bin 7 through the empty shaft 2 to continue loading heavy objects 19, and this process is repeated. In the energy release condition, the empty carrier 4 is loaded with heavy objects 19 in the horizontal channel 3 of the upper storage bin 6, and runs to the standby transfer area 15 on the upper layer. After the turning is completed, it runs to the standby transfer area 15 on the lower layer through the heavy object shaft 1. After the turning is completed, it enters the horizontal channel 3 of the upper storage bin 6. Channel 3 unloads the heavy object 19, and then, after the empty platform 4 completes the turn, it returns to the upper storage bin 6 through the empty shaft 2 to continue loading the heavy object 19, and this process is repeated; in a fault condition, the platform 4 fails, and the faulty platform 4 slowly runs to the standby transfer area 15 at the nearest maintenance area 13, and after completing the turn, it enters the maintenance area 13 to wait for maintenance. At the same time, the system calls the spare platform in the spare area 14 to replace the faulty platform 4 to avoid reducing the energy storage capacity of the system. Multiple horizontal channels 3 can be used for the platform 4. When the loading and unloading work in the loading and unloading area 8 is not completed, the platform 4 in sequence can run through other horizontal channels 3 without affecting the normal circulation of the system. The loading and unloading work is completed by the automatic stacking device.

[0045] Example 2

[0046] like Figure 6As shown, the difference between this embodiment and embodiment 1 is that: the system consists of two weight shafts 1 and one empty shaft 2, wherein the two weight shafts 1 are divided into two left and right circulation paths, and the empty carriers 4 in the two circulations alternately return to the upper and lower storage bins through the empty shafts 2; in the energy storage condition, the empty carrier 4 is loaded with weights 19 in the horizontal channel 3 of the lower storage bin 7, runs to the standby transfer area 15, and after the turn is completed, it runs to the upper standby transfer area 15 through the weight shaft 1, and after the turn is completed, it enters the horizontal channel 3 to unload the weights 19, and then, after the empty carrier 4 completes the turn, it returns through the empty shaft 2 Return to the lower storage bin 7, continue to load heavy objects 19, and repeat this process; in the energy release condition, the empty carrier 4 is loaded with heavy objects 19 in the horizontal channel 3 of the upper storage bin 6, runs to the standby transfer area 15, and after completing the turn, runs to the lower standby transfer area 15 through the heavy object shaft 1, and after completing the turn, enters the horizontal channel 3 to unload the heavy objects 19, and then, after the empty carrier 4 completes the turn, returns to the upper storage bin 6 through the empty shaft 2, continues to load heavy objects 19, and repeats this process; in the energy storage condition and the energy release condition, the left and right cycle running time is controlled so that the empty carrier 4 in the two cycles alternately passes through the empty shaft 2. In the case of a failure of the carrier 4, the failed carrier 4 slowly moves to the standby transfer area 15 at the nearest maintenance area 13, and after completing the transfer, enters the maintenance area 13 to wait for maintenance. At the same time, the system calls the standby carrier in the standby area 14 to replace the failed carrier 4 to avoid reducing the energy storage capacity of the system. Multiple horizontal channels 3 can realize that when the carrier 4 in the loading and unloading area 8 has not completed the loading and unloading work, the carrier 4 in sequence can run through other horizontal channels 3 without affecting the normal circulation of the system.

[0047] Example 3

[0048] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that the steering technology is realized by a horizontally running linear motor, a horizontally running primary driving side 21 is provided on the back of the secondary driving side 20 of the standby rotation area 15, the secondary driving side 20 of the horizontal channel 3 is not in the same plane as the secondary driving side 20 of the heavy object shaft 1 or the empty shaft 2, after the carrier 4 of the heavy object shaft 1 runs to the standby rotation area 15, the horizontally running linear motor drives the carrier 4 and the secondary driving side 20 of the standby rotation area 15 to run horizontally to the empty shaft 2, after the loading and unloading is completed, the carrier 4 leaves the standby rotation area 15, and the horizontally running linear motor drives the secondary driving side 20 to reset.

[0049] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the protection scope of the present invention.

Claims

1. A vertical circulation gravity energy storage system based on a linear motor, comprising a circulation shaft, a platform system and an energy storage system, characterized in that: The circulation shaft includes a vertically arranged weight shaft and an empty shaft, and a plurality of horizontal channels connected with the weight shaft and the empty shaft. The weight shaft and the empty shaft are both located underground. A secondary switching disk is rotatably arranged at the vertical connection between the weight shaft and the empty shaft and the horizontal channel. A secondary driving side is arranged in the weight shaft, the empty shaft and the horizontal channel, and on the secondary switching disk. The secondary driving side includes a first track group and a linear motor secondary. The platform system includes a plurality of platforms arranged in a circulation shaft, the platforms are used to carry heavy objects, a primary switching disk is rotatably arranged on the side of the platforms, and a primary driving side is arranged on both the platforms and the primary switching disk, and the primary driving side includes a second track group and a primary of a linear motor, and the second track group and the primary of the linear motor are respectively adapted to the first track group and the secondary of the linear motor; The energy storage system includes an upper storage bin, a lower storage bin and a loading and unloading area. The upper storage bin is set on the ground, and the lower storage bin is set underground. Both the upper storage bin and the lower storage bin are provided with a plurality of heavy objects and an automatic stacking device for loading, unloading and stacking heavy objects. The loading and unloading area is set at a horizontal channel.

2. The vertical circulation gravity energy storage system based on a linear motor according to claim 1 is characterized in that: The carrier comprises a shell with a regular polygonal cross section, and the shell is a hollow structure penetrating from top to bottom.

3. The vertical circulation gravity energy storage system based on a linear motor according to claim 2 is characterized in that: The first track group in the heavy object well and the empty well is vertically arranged, and the first track group in the horizontal channel is horizontally arranged. The first track group includes guide bars and brake guide rails arranged on both sides of the secondary of the linear motor, and two linear guide rails arranged outside the guide bars and brake guide rails.

4. The vertical circulation gravity energy storage system based on a linear motor according to claim 3 is characterized in that: The second track group includes a collector and a brake arranged on both sides of the primary of the linear motor, and two groups of slide rails arranged outside the collector and the brake, and the collector, the brake and the two groups of slide rails correspond one by one to the guide bar, the brake guide rail and the two linear guide rails respectively.

5. The vertical circulation gravity energy storage system based on a linear motor according to claim 4 is characterized in that: A positioner, a fixer and an anti-falling device are also arranged on the shell of the carrier.

6. The vertical circulation gravity energy storage system based on a linear motor according to claim 5 is characterized in that: The secondary switching disk is also provided with a servo motor and is driven to rotate by the servo motor.

7. The vertical circulation gravity energy storage system based on a linear motor according to claim 6 is characterized in that: The area where the secondary switching disk is located is set as the standby area.

8. The vertical circulation gravity energy storage system based on a linear motor according to claim 7 is characterized in that: The energy storage system is also provided with an energy storage battery pack for providing or absorbing energy during the movement of an idle platform.

9. The vertical circulation gravity energy storage system based on a linear motor according to claim 8, characterized in that: The internal sections of the heavy-load well and the empty well are provided with maintenance areas, and a spare area is provided on the ground, and an empty spare platform is parked in the spare area.

Images