Efficient gravity energy storage power generation system

Abstract

The utility model discloses an efficient gravity energy storage power generation system which comprises an energy storage body, two storage yards, a lifting power generation device and a control device, each storage yard comprises a plurality of energy storage rails, every two adjacent energy storage rails are connected end to end through a rail conversion power generation device, and dampers are arranged on the energy storage rails; the track conversion power generation device comprises a rack, a chain wheel and chain assembly and a power generation assembly, an outer chain plate with the same length of a chain interval is in an L shape, a transmission supporting track is arranged between an upper storage yard and a lower storage yard, and one end of the transmission supporting track is connected with an energy storage track with the highest altitude of the upper storage yard. The other end is connected with the energy storage track at the lowest altitude of the lower storage yard; the lifting power generation device is of a mutually-staggered relay type structure. Storage of the energy storage body can be increased to the maximum extent in a limited space, the energy storage body is driven to move without power, the electricity utilization cost is reduced, the power generation efficiency is greatly improved, and the energy storage device is suitable for storing the energy storage body for gravity energy storage power generation.

Description

Technical Field

[0001] The utility model relates to a gravity energy storage power generation system, in particular to a high-efficiency gravity energy storage power generation system. Background Art

[0002] At present, the new direction of the development of my country's power system mainly includes an energy system based on photovoltaic power generation and an energy storage system based on physical conversion. The physical energy storage system mainly includes pumped storage, gravity energy storage and compressed air energy storage. Among them, gravity energy storage has a good promotion prospect because it can increase the power generation rate by setting the specific gravity of heavy objects. Gravity energy storage is to lift heavy objects to a certain height and store them in a yard to form high-level potential energy. When electricity is needed, the heavy objects are released to a lower position. The release process drives the generator to work and converts potential energy into electrical energy.

[0003] The gravity energy storage power generation system includes energy storage weights, a lifting power generation device, and an upper yard and a lower yard for storing the energy storage weights. In the prior art, the lifting energy storage path of the weights is the same as the downward energy release path of the weights. When the slope of the path is constant, the power generation efficiency will not change much. Since the path cannot be extended, the high potential energy cannot be released to the maximum extent, which reduces the power generation efficiency.

[0004] Furthermore, in the prior art storage yard, one or more storage tracks are set up at high and low flat terrain locations. The storage tracks are spread out in a carpet-like manner as a layer, and a chain is driven by a power source to drive the energy storage body to a designated storage location. When the heavy object needs to be released, the energy storage body is driven to the location where it needs to be released by the power source. In this process, the power source needs to consume a certain amount of electrical energy to drive the energy storage body to move, which reduces the conversion rate and increases the operating cost. In addition, the energy storage bodies are arranged in sequence, occupying a larger area, which increases the construction or renovation cost. Utility Model Content

[0005] In order to solve the above deficiencies in the prior art, the utility model aims to provide a high-efficiency gravity energy storage power generation system to maximize the use of potential energy, improve power generation efficiency and reduce operating costs.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] It includes energy storage, two stockpiles, lifting power generation device and control device. The two stockpiles have the same structure, one is located at a high altitude and is called the upper stockpiles, and the other is located at a low altitude and is called the lower stockpiles.

[0008] The stacking yard includes a plurality of energy storage rails, each of which is inclined to form a structure that is continuously bent in the vertical direction. Two adjacent energy storage rails are connected end to end through a rail conversion power generation device. A plurality of dampers for limiting the movement speed and position of the energy storage body are arranged at intervals on the energy storage rails.

[0009] The track conversion power generation device comprises a frame, a sprocket chain assembly rotatably connected to the frame, and a power generation assembly for energy conversion, the power input end of the power generation assembly is assembled and connected with the sprocket chain assembly, the chain intervals in the sprocket chain assembly have an outer chain plate of the same length in an L-shape, the L-shaped outer chain plate intersects with the projection of the energy storage track, so that the energy storage body is transitioned from the high-position energy storage track to the low-position energy storage track through the L-shaped outer chain plate;

[0010] A transmission support track is provided between the upper stockyard and the lower stockyard, one end of the transmission support track is connected to an energy storage track with the highest altitude in the upper stockyard, and the other end is connected to an energy storage track with the lowest altitude in the lower stockyard, and the energy storage track with the lowest altitude in the upper stockyard is connected to the transmission support track through a first conversion device, and the energy storage track with the highest altitude in the lower stockyard is connected to the transmission support track through a second conversion device;

[0011] The energy storage body is slidably arranged on the energy storage track and the transmission support track;

[0012] There are multiple lifting power generation devices, which adopt an interlaced relay structure. The lifting power generation devices at both ends correspond to the two ends of the transmission support track, and are used to drive the energy storage body to move from the lower yard to the upper yard along the transmission support track to store energy, and drive the lifting power generation device to generate electricity when the energy storage body moves downward.

[0013] As a limitation of the present invention, the inclination of the energy storage track to the horizontal ground is 1 to 5 degrees.

[0014] As a further limitation of the present utility model, the damper includes a damping plate fixed on the energy storage track, and the damping plate is arranged to be inclined upward along the movement direction of the energy storage body, and the material of the damping plate is spring steel.

[0015] As a second limitation of the present utility model, the lifting power generation device includes two lifting power generation bodies and two lifting chains;

[0016] The lifting power generation body comprises a bracket, two rotating shafts rotatably arranged on the bracket and a transmission switching gear box respectively connected to the two rotating shafts, the two rotating shafts are arranged at intervals, the two rotating shafts are connected to the transmission switching gear box through a sprocket assembly, and the transmission switching gear box is respectively connected to the motor and the generator; a lifting sprocket is fixedly arranged on each rotating shaft of the lifting power generation body, the two lifting sprockets on one side of the two lifting power generation bodies are sleeved with a lifting chain, and the two lifting sprockets on the other side of the two lifting power generation bodies are sleeved with another lifting chain;

[0017] The two rotating shafts of the lifting power generation body are respectively equipped with a relay lifting sprocket, and the two relay lifting sprockets are both sleeved with a relay lifting chain. The two relay lifting chains are located on the inner side of the lifting chain to realize the relay staggered connection of the two lifting power generation devices; a number of hook components for hanging the two sides of the energy storage body are evenly spaced on the lifting chain.

[0018] As a limitation of the present utility model, the hook assembly includes an L-shaped first hook and a T-shaped second hook; the first hook includes a first fixing plate and a first blocking plate fixedly mounted on the first fixing plate, the first fixing plate being fixedly mounted on an outer chain plate of the lifting chain; the second hook includes a second fixing plate and a second blocking plate fixedly mounted on the second fixing plate, one end of the second fixing plate being fixedly mounted on the outer chain plate on which the first fixing plate is mounted, and the other end being fixedly mounted on another outer chain plate adjacent to the outer chain plate;

[0019] The first blocking plate and the second blocking plate overlap each other, and the included angle between the second blocking plate and the second fixing plate is smaller than the included angle between the first blocking plate and the first fixing plate.

[0020] As a further limitation of the present invention, hook components are fixedly provided on the outer link plates at corresponding positions on the inner and outer sides of the lifting chain.

[0021] As a further limitation of the present invention, the angle between the first fixing plate and the first blocking plate is 60°, and the angle between the second fixing plate and the second blocking plate is 40°.

[0022] As the third limitation of the present utility model, the first conversion device includes a rotating bracket and two pneumatic clutches, the two pneumatic clutches are respectively mounted on the rotating shafts of two lifting power generation bodies, the lifting power generation bodies on which the two pneumatic clutches are installed are two of the energy storage rails with the lowest altitude closest to the upper yard, and the pneumatic clutches are located on the rotating shafts on which two relay lifting sprockets are installed, the two ends of the rotating bracket are respectively fixed on the two pneumatic clutches, the bearing seat for mounting the rotating shaft on the lifting power generation body with the lower altitude of the two lifting power generation bodies is movably arranged on the lifting power generation body; the transmission support track is disconnected between the lifting power generation bodies, and a transmission support track is formed on one side of the rotating bracket between the lifting power generation bodies, filling the disconnected part of the transmission support track, so that the lifted part of the transmission support track is a straight line.

[0023] As a limitation of the present utility model, the second conversion device includes an opening and closing rod hinged on the lower yard energy storage track and a motor for driving the opening and closing rod to rotate around the hinge point, and the end of the opening and closing rod not connected to the energy storage track is in contact with the transmission support track.

[0024] As a fourth limitation of the present utility model, the energy storage track includes two steel rails, round tubes or steel ropes spaced apart to support both sides of the energy storage body.

[0025] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0026] (1) The energy storage track of the utility model is inclined. When the energy storage bodies are stacked, the energy storage bodies can slide to the corresponding positions in sequence along the energy storage track under the action of gravity and inertia. No other power devices are required for transportation, which greatly saves electricity costs and reduces operating costs. In addition, the multi-layer structure of the energy storage track with continuous bending can store more energy storage bodies on a limited ground, saving storage space and breaking the limitation of reducing the storage of energy storage bodies due to insufficient ground area. A track conversion power generation device is set between the two energy storage tracks to convert the potential energy difference generated by the inclined setting into electric energy through the track conversion power generation device. When the energy storage bodies are stacked, power generation can also be achieved, thereby increasing the power generation amount. The combination of the three methods of driving the energy storage bodies to move without power during stacking, increasing the number of energy storage bodies stored, and generating electricity during track conversion greatly improves the efficiency of power generation and can achieve greater economic benefits. The energy release path of the entire system is much larger than the lifting path, maximizing the conversion of potential energy into electric energy, making the power generation efficiency much higher than that of a structure with the same lifting and energy release paths.

[0027] (2) The energy storage track of the utility model has a small inclination. Combined with the use of a damper, the movement speed of the energy storage body can be effectively controlled, which can not only protect the track conversion power generation device, but also facilitate the sequential storage of the energy storage body on the energy storage track;

[0028] (3) The utility model supports both sides of the energy storage body through the first blocking plate and the second blocking plate, thereby increasing the strength of the support. The second fixing plate is arranged on two adjacent outer chain plates, so that the force generated by the energy storage body is dispersed on the two adjacent outer chain plates, reducing the pulling on one chain plate and reducing the degree of outward inclination of the hanging part of the first blocking plate and the second blocking plate, which can effectively prevent the energy storage body from falling off the hook. At the same time, the first blocking plate and the second blocking plate cooperate to form double protection, which is safer. When the lifting body relays the energy storage body, the first blocking plate plays a pulling role and the second blocking plate plays a pushing role, which effectively prevents the energy storage body from falling off during the handover process.

[0029] (4) Hook components are provided at corresponding positions on the inner and outer sides of the chain of the utility model, which can increase the overall strength and extend the service life;

[0030] (5) The energy storage track of the utility model is a steel rail, a round tube or a steel wire rope, and can be supported at both ends by a scaffold, which greatly saves construction costs.

[0031] In summary, the utility model can maximize the storage of energy storage bodies within a limited space. When storing energy storage bodies, there is no power input and power generation is performed, which reduces electricity costs, increases energy release paths, and greatly improves power generation efficiency. It is suitable for gravity energy storage power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Figure 1 This is a schematic diagram of the main structure of the lifting power generation device connected with the upper and lower stockpiles in Example 1 of the utility model;

[0034] Figure 2 This is a schematic diagram of the main structure of the storage yard in Example 1 of the utility model;

[0035] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part C;

[0036] Figure 4 This is a schematic diagram of the top view of the structure of the energy storage track and the sprocket of the track conversion power generation device in Example 1 of the utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the energy storage body and the damper in use state in Example 1 of the utility model;

[0038] Figure 6 This is a schematic diagram of the main structure of the lifting power generation device of Example 1 of the utility model;

[0039] Figure 7 This is a schematic diagram of the top view of the positional relationship between the transmission support rail and the lifting chain of Example 1 of the utility model;

[0040] Figure 8 This is a schematic diagram of the main structure of the lifting chain of Embodiment 1 of the utility model;

[0041] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of the D portion;

[0042] Fig.10 This is a schematic diagram of the main structure of the first hook of Example 1 of the utility model;

[0043] Fig.11 This is a schematic diagram of the main structure of the second hook in Example 1 of the utility model;

[0044] Fig.12 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0045] Fig.13 This is a simplified structural diagram of the rotating bracket after rotating around the axis in Example 1 of the utility model;

[0046] Fig.14 for Figure 1 Schematic diagram of the structure of part B method.

[0047] In the figure: 1. energy storage track; 2. track conversion power generation device; 21. frame; 22. sprocket; 23. chain; 231. L-shaped outer chain plate; 24. generator; 3. damper; 4. energy storage body; 41. support rod; 5. lifting chain; 51. outer chain plate; 6. first hook; 61. first fixed plate; 62. first blocking plate; 7. second hook; 71. second fixed plate; 72. second blocking plate; 8. bracket; 9. lifting sprocket; 10. sprocket assembly; 11. transmission support track; 12. rotating bracket; 13. clutch; 14. motor; 15. opening and closing rod; 16. relay lifting sprocket; 17. relay lifting chain. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0049] Embodiment A high-efficiency gravity energy storage power generation system

[0050] like Figure 1As shown, this embodiment includes an energy storage body 4, two stockpiles, a transmission support track 11, a lifting power generation device and a control device. The energy storage body 4 is used to store and release energy. The two stockpiles have the same structure, one is located at a high altitude as the upper stockpile, and the other is located at a low altitude as the lower stockpile. The upper stockpile is used to receive and store the energy storage body 4 that generates high potential energy, and the lower stockpile is used to receive and store the energy storage body 4 after the potential energy is released. Mountains with height differences, mines that have been mined, mine pits or mines, etc. can be used to reduce the construction scale and engineering volume of energy storage equipment. There are multiple lifting power generation devices, which adopt an interlaced relay structure to lift the energy storage body 4 from the lower stockpile to the upper stockpile to store potential energy, and then the energy storage body 4 automatically falls down by gravity to drive the generator to generate electricity. In this embodiment, the energy storage body 4 can be lifted to the upper stockpile at a high position for storage by using solar energy, wind energy or electric energy during the period of underestimated electricity consumption, and the energy storage body 4 is released to generate electricity when electricity is needed, and then stored in the lower stockpile at a low position.

[0051] 1. Energy storage body 4

[0052] The energy storage body 4 is a block structure with high specific gravity. In order to facilitate transportation, support rods 41 are provided on both sides of the energy storage body 4 in the height direction. When lifting or releasing the energy storage body 4, it is sufficient to receive the support rods 41 on both sides of the energy storage body 4. Both support rods 41 are rotatably connected with pulleys for matching with the track.

[0053] 2. Upper and Lower Yards

[0054] like Figure 2 , Figure 3 As shown, both the upper yard and the lower yard include a plurality of energy storage tracks 1 and a plurality of track conversion power generation devices 2. The energy storage tracks 1 are used to carry the energy storage body 4. The track conversion power generation devices 2 are used to transition the energy storage body 4 from one energy storage track 1 to another energy storage track 1 and convert the potential energy generated in the process into electrical energy.

[0055] The energy storage track 1 includes two circular tubes arranged at intervals. A scaffold or fixed column is set up on the ground to support the circular tubes. The two circular tubes are used to support the two sides of the energy storage body 4. The support rods 41 on both sides of the energy storage body 4 are respectively placed on the two circular tubes, and the pulleys on the support rods 41 are slidably connected to the two circular tubes, so that the energy storage body 4 is located between the two circular tubes, which can not only support the energy storage body 4, but also facilitate the sliding of the energy storage body 4 on the two circular tubes. Each energy storage track 1 is tilted downward along the movement direction of the energy storage body 4. When the energy storage body 4 is located on the energy storage track 1, due to the tilted setting of the energy storage track 1, the pulleys on the support rods 41 of the energy storage body 4 slide in contact with the energy storage track 1. Under the action of the gravity component, the energy storage body 4 does not need a driving device and can move downward along the energy storage track 1, so that the energy storage body 4 can be automatically stacked at a certain position to achieve unpowered stacking.

[0056] In order to increase the number of energy storage bodies 4 that can be stored and reduce the floor space, the energy storage track 1 is tilted and the tilt directions of two adjacent energy storage tracks 1 are opposite. After being connected end to end, a "Z" structure that is continuously bent in the vertical direction is formed, so that the energy storage body 4 can continuously move from a high position to a low position. The inclination of each energy storage track 1 to the horizontal ground is 1°, 2°, 3°, 4° or 5°, and the inclination angle of this embodiment is 3°. The energy storage track 1 with a "Z" structure can not only form multiple layers to store more energy storage bodies 4, but also generate a potential energy difference in the energy storage body 4. In order to further utilize the potential energy difference and enable the energy storage body 4 to smoothly transition from one energy storage track 1 to another energy storage track 1, a track conversion power generation device 2 is set at the end-to-end connection between the two energy storage tracks 1, and the track conversion power generation device 2 is used to make the energy storage body 4 change direction and move, which is explained in detail below.

[0057] The track conversion power generation device 2 includes a frame 21, a sprocket chain assembly and a power generation assembly for energy conversion, wherein the power generation assembly includes a generator 24 and a driving sprocket fixed on the input shaft of the generator 24. The sprocket chain assembly is rotatably connected to the frame 21, and the power input end of the generator 24 is fixedly connected to the sprocket chain assembly, that is, the movement of the sprocket chain assembly drives the generator 24 to generate electricity. In this embodiment, the chain 23 of the sprocket chain assembly is structurally improved so that it can transition the energy storage body 4 from the high-position energy storage track 1 to the low-position energy storage track 1 through the L-shaped outer chain plate 231.

[0058] The sprocket chain assembly includes four sprockets 22 and two chains 23. Two of the four sprockets 22 are arranged in a group, and each group is provided with a chain 23. The chains 23 on the two groups of sprockets 22 move synchronously in the same direction, and both chains 23 move in the direction of the energy storage body 4 descending. The two groups of sprockets 22 are arranged at intervals, and the two lower sprockets 22 are assembled on a rotating shaft, on which the third sprocket is fixed. The third sprocket here is connected to the driving sprocket on the input shaft of the generator 24 through a common chain, and the force on the sprocket chain assembly is transmitted to the generator 24. The chains 23 in the sprocket chain assembly are L-shaped with an outer chain plate of the same length at intervals, that is, the chains 23 in the sprocket chain assembly are basically the same as the ordinary connection, except that an L-shaped outer chain plate 231 is used to replace the original outer chain plate at intervals, and the end of the L-shaped outer chain plate 231 that is not hinged to the chain 23 is tilted and tilted toward the chain 23, and the L-shaped outer chain plate 231 transitions through an arc at a right angle.

[0059] In order to ensure that the energy storage body 4 on the energy storage track 1 can slide onto the L-shaped outer link plate 231 of the chain 23, Figure 2 In the main projection direction, the L-shaped outer link plate 231 intersects with the projection of the energy storage track 1, as shown in FIG. Figure 4As shown, in the top projection direction, the two round tubes are located on the inner side of the two chains 23 of the sprocket chain assembly. When the energy storage body 4 moves to the tail end of the energy storage track 1, the two L-shaped outer chain plates 231 just move to the tail end of the energy storage track 1, and the energy storage body 4 continues to slide downward under the action of gravity, and the support rods 41 on both sides of the energy storage body 4 fall on the two L-shaped outer chain plates 231. As the two L-shaped outer chain plates 231 move downward, when the energy storage body 4 moves to the next energy storage track 1, because the two round tubes of the lower energy storage track 1 intersect with the L-shaped outer chain plates 231, blocking the way of the support rods 41 on both sides of the energy storage body 4, the energy storage body 4 is transferred to another low-position energy storage track 1, and continues to descend along the inclined energy storage track 1. The L-shaped outer chain plates 231 continue to move with the sprocket 22, so as to transition the energy storage body 4 from the high-position energy storage track 1 to the low-position energy storage track 1.

[0060] like Figure 2 , Figure 5 As shown, a plurality of dampers 3 are arranged at intervals on the energy storage track 1, and the dampers 3 are used to limit the movement speed of the energy storage body 4, so as to ensure that when the energy storage body 4 moves to the end of the energy storage track 1, the L-shaped outer link plate 231 just moves to the end of the energy storage track 1. The damper 3 includes a damping plate fixed on the energy storage track 1, and the damping plate is arranged to be inclined upward along the movement direction of the energy storage body 4, so as to prevent the energy storage body 4 from moving downward, and the material of the damping plate is spring steel, which has a certain elasticity and can generate elastic potential energy. In this embodiment, the energy storage bodies 4 on the energy storage track 1 are divided into groups of ten by the dampers 3 arranged at intervals. When the energy storage bodies 4 are in a stationary state, the component force of the gravity of the ten energy storage bodies 4 is equal to the elastic potential energy of the dampers 3, and they are blocked by the dampers 3 and cannot continue to move downward. When an energy storage body 4 moves downward at the back, the energy storage body 4 at the back gives the grouped energy storage bodies 4 an acceleration. An energy storage body 4 in each group that contacts the damper 3 overcomes the resistance of the damper 3 and starts to move downward. The second energy storage body 4 in each group is blocked by the damper 3 and waits for the next energy storage body 4 to collide before moving downward.

[0061] 3. Transmission support track 11

[0062] A transmission support track 11 is provided between the upper yard and the lower yard, and the transmission support track 11 is used to connect the upper yard and the lower yard, so that the lifting and descending movement of the energy storage body 4 forms a complete route. One end of the transmission support track 11 is connected to the energy storage track with the highest altitude in the upper yard, so that the lifted energy storage body 4 transitions to the energy storage track of the upper yard, and the other end is connected to the energy storage track with the lowest altitude in the lower yard, so that the descending energy storage body 4 transitions to the energy storage track of the lower yard. And the energy storage track with the lowest altitude in the upper yard is connected to the transmission support track 11 through a first conversion device, and the energy storage track with the highest altitude in the lower yard is connected to the transmission support track 11 through a second conversion device. The transmission support track 11 of this embodiment is two circular tubes arranged at intervals, and the circular tubes are fixed by scaffolding or columns.

[0063] 4. Improve the power generation device

[0064] The lifting power generation device of this embodiment is a prior art, that is, when the energy storage body 4 is lifted upward, the lifting chain 5 is driven by a motor to transport the energy storage body 4, and when the energy storage body 4 is released from a high position to a low position, the lifting chain 5 is pulled to drive the generator to generate electricity. Since the lifting power generation body is a prior art, this embodiment only describes the components that are connected to this embodiment, and other components are not repeated.

[0065] like Figure 6 As shown, the two ends of the lifting power generation device are arranged at the two ends of the transmission support track 11, which are used to drive the energy storage body 4 to move from the lower yard to the upper yard along the transmission support track 11 to store energy, and to drive the lifting power generation device to generate electricity when the energy storage body 4 moves downward. The lifting power generation device includes two lifting power generation bodies and two lifting chains 5.

[0066] (1) Improve the power generation body

[0067] like Figure 6 As shown, the lifting power generation body includes a bracket 8, two rotating shafts rotatably arranged on the bracket 8, and a transmission switching gear box connected to the two rotating shafts. The bracket 8 is U-shaped, and the two rotating shafts are rotatably arranged on the inner walls on both sides above the bracket 8. The two rotating shafts are arranged at intervals, and a gap is formed in the middle for the energy storage body 4 to pass through. Figure 7 As shown, a lifting sprocket 9 is fixedly provided on each of the two rotating shafts for sleeved lifting chains 5. That is, two lifting sprockets 9 are arranged at intervals on each lifting power generation body, and one lifting chain 5 is sleeved on the two lifting sprockets 9 on one side of the two lifting power generation bodies, and another lifting chain 5 is sleeved on the two lifting sprockets 9 on the other side of the two lifting power generation bodies, so that four lifting sprockets 9 are located on both sides, two on each side, and one lifting chain 5 is sleeved on the two lifting sprockets 9 on each side, so that a lifting path is formed between the two lifting power generation bodies through the lifting chains 5.

[0068] The two rotating shafts of the lifting power generation body are also equipped with a relay lifting sprocket 16, and the two relay lifting sprockets 16 are sleeved with relay lifting chains 17. The two relay lifting chains 17 are located on the inner side of the lifting chain, staggered with the two lifting chains 5, and the two relay lifting chains 17 are used to connect two adjacent lifting power generation devices. No relay lifting chain 17 is set between the two lifting power generation bodies of the lifting power generation device, so as to realize the relay staggered connection of the two lifting power generation devices. Each lifting chain 5 and each relay lifting chain 17 are matched with the transmission support rails 11 on both sides, and a number of hook components for hanging on both sides of the energy storage body 4 are evenly spaced on the lifting chain 5. The hook components drive the energy storage body 4 to move with the movement of the lifting chain 5.

[0069] The two rotating shafts of the present embodiment are connected to the transmission switching gear box through the sprocket assembly 10, that is, a driving shaft is also rotatably arranged under the bracket 8, and the driving wheel of the sprocket chain assembly is fixed on the driving shaft, and the driven wheel of the sprocket chain assembly is fixedly connected to the rotating shaft, and the driving shaft is connected to the transmission switching gear box, and the transmission gear box is respectively connected to the motor and the generator; the structure of the transmission switching gear box is the existing technology, that is, there are three shafts on the transmission switching gear box, which are the first shaft output on the left, the second shaft and the third shaft output on the right, and its interior is similar to the gearbox of a car, and the gear on the first shaft is shifted by the shift fork to realize the transmission connection between the first shaft and the second shaft or the transmission connection between the first shaft and the third shaft, so as to switch to the operation of the motor or the generator. This technology is the existing technology and will not be repeated here.

[0070] (2) Lifting chain 5

[0071] like Figure 8 , Fig. 9 As shown, the lifting chain 5 adopts a common chain in the prior art. Since the lifting path is a slope, when the energy storage body 4 is lifted, the hook assembly can hook the support rods 41 on both sides of the energy storage body 4, and lift it upward with the movement of the lifting chain 5. The hook assembly includes a first hook 6 and a second hook 7. The first hook 6 is an L-shaped structure, and the second hook 7 is a T-shaped structure, which is described in detail below.

[0072] like Fig.10As shown, the first hook 6 is in the form of a sheet, including a first fixing plate 61 and a first blocking plate 62. The first blocking plate 62 is fixed at the end of the first fixing plate 61 to form an L-shape. The L-shape of this embodiment has a certain angle, that is, the first blocking plate 62 is inclined toward the first fixing plate 61, so that the angle between the first fixing plate 61 and the first blocking plate 62 is 60°. The first fixing plate 61 is fixed on an outer chain plate 51 of the lifting chain 5. Two holes are set on the first fixing plate 61 of this embodiment. The two holes are sleeved on the pins at both ends of the outer chain plate 51. The ends of the pins are positioned on the first fixing plate 61 through spring pins, so that the first fixing plate 61 is tightly fixed to the outer chain plate 51. The length of the first blocking plate 62 is substantially the same as the length of the chain plate, and the connection between the first fixing plate 61 and the first blocking plate 62 is in the shape of an arc, which is convenient for fitting with the support rod on the energy storage body 4.

[0073] like Fig.11 As shown, the second hook 7 is sheet-shaped, including a second fixing plate 71 and a second blocking plate 72. The second blocking plate 72 is fixed at the center position of the second fixing plate 71 to form an inverted T-shape. The T-shape of this embodiment has a certain angle, that is, the second blocking plate 72 is inclined toward the second fixing plate 71, so that the angle between the second fixing plate 71 and the second blocking plate 72 is 40°. One end of the second fixing plate 71 is fixed on the outer link plate 51 on which the first fixing plate 61 is installed, and the other end is fixed on another outer link plate 51 adjacent to the outer link plate 51. The other outer link plate 51 is an outer link plate 51 adjacent to the first blocking plate 62, that is, the second fixing plate 71 is straddled on the two outer link plates 51. The second fixing plate 71 of this embodiment is provided with two holes, which are respectively sleeved on the pins of two adjacent outer link plates 51, wherein one hole on the second fixing plate 71 and one hole on the first fixing plate 61 are sleeved on a pin, and a spring pin is provided at the end of the pin to position the second fixing plate 71, so that the second fixing plate 71 and the outer link plate 51 are tightly fixed. The connection between the second fixing plate 71 and the second blocking plate 72 is in an arc shape, which is convenient for fitting with the support rod on the energy storage body 4.

[0074] Since the first fixing plate 61 and the second fixing plate 71 are both arranged on the pin shaft of the lifting chain 5, and the angle between the first blocking plate 62 and the first fixing plate 61 is 60°, the angle between the second blocking plate 72 and the second fixing plate 71 is 40°, and the angle between the second blocking plate 72 and the second fixing plate 71 is smaller than the angle between the first blocking plate 62 and the first fixing plate 61, therefore, the first blocking plate 62 and the second blocking plate 72 overlap with each other, and the first blocking plate 62 and the second blocking plate 72 of this embodiment are flush with one end of the energy storage body 4 that is not hung.

[0075] In order to increase the strength of this embodiment, hook components are fixed on the outer link plates 51 at corresponding positions on the inner and outer sides of the lifting chain 5, that is, the hook components appear in pairs on the inner and outer sides of the lifting chain 5 and are located at both ends of the pin shaft on the lifting chain 5.

[0076] 5. First conversion device

[0077] like Figure 7 , 12 As shown in Figures 1 and 13, the first conversion device includes two rotating brackets 12 and four pneumatic clutches 13. The energy storage track 1 with the lowest altitude in the upper yard transitions to the transmission support track 11 at a lifting power generation device. Therefore, the rotating bracket 12 is arranged at the relay of the two lifting power generation devices there, that is, the two adjacent lifting power generation bodies on the two adjacent lifting power generation devices. The two pneumatic clutches 13 are respectively mounted on the rotating shafts of the two lifting power generation bodies. The rotating shaft of the lower-altitude one of the two lifting power generation bodies is a two-stage structure and is supported by two bearing seats respectively. The lifting sprocket 9 is fixed on the two outer rotating shafts, and the relay lifting sprocket 16 is fixed on the two inner rotating shafts. The four pneumatic clutches 13 are respectively mounted on the four inner rotating shafts of the two lifting power generation bodies. The two ends of the rotating bracket 12 are respectively fixed on the two pneumatic clutches 13 of the two lifting power generation bodies, and the other rotating bracket 12 is arranged on the other side. The bearing seat on which the inner rotating shaft is installed on the lifting power generation body with the lower altitude of the two lifting power generation bodies is movably arranged on the lifting power generation body. Since the rotating bracket 12 is rigidly connected, the two rotating shafts are connected together to keep the relay lifting chains 16 on the two relay lifting sprocket wheels 16 in a taut state.

[0078] The transmission support track 11 is disconnected between the two lifting power generation bodies. The transmission support track 11 is formed on one side of the rotating bracket 12 between the lifting power generation devices, and is connected to the disconnected transmission support track 11 to fill the disconnected part of the transmission support track 11, so that the lifted part of the transmission support track 11 is a straight line. A first conversion device is set on the rotating shaft of a pair of relay lifting sprockets 16 inside the lifting power generation device, so that the two relay lifting sprockets 16 on the inner side are lifted at the same time to make way for the energy storage body 4 to pass through.

[0079] The lifting power generation device here has two states: when the energy storage body 4 needs to be lifted upward for energy storage, the lifting power generation device here operates normally like other lifting power generation devices, one side of the rotating bracket 13 is connected with the transmission support track 11 to form a straight line, and the pneumatic clutch 13 loosens the rotating shaft, so that the rotating shaft rotates normally, and the rotating bracket 12 does not rotate with the rotating shaft; when the energy storage body 4 needs to be released for downward power generation, the two pneumatic clutches 13 on the lifting power generation device here hold the rotating shaft tightly, and the rotating shaft on the lifting power generation body at a higher altitude rotates, driving the rotating bracket 12 to rotate around the rotating shaft on the power generation body at a higher altitude, so that the rotating bracket 12 drives the bearing seat and the relay lifting chain 17 on the lifting power generation body to rotate upward, so that a gap for the energy storage body 4 and the support rod 41 to pass through is formed between the two lifting power generation bodies. When the energy storage body 4 is released, the rotating shaft on the lifting power generation body at a higher altitude is reversed, driving the bearing seat to fall back to its original state, in preparation for lifting the energy storage body 4.

[0080] 6. Second conversion device

[0081] like Fig.14 As shown, the second conversion device includes an opening and closing rod 15 and a motor 14, and one end of the opening and closing rod 15 is hinged on the energy storage track 1 of the lower yard. Since the energy storage track 1 is fixed on the scaffolding, the motor 14 is fixed on the scaffolding, and the output shaft of the motor 14 is fixedly connected to the opening and closing rod 15 at the hinge point, which is used to drive the opening and closing rod 15 to rotate around the hinge point, and the end of the opening and closing rod 15 that is not connected to the energy storage track 1 is in contact with the transmission support track 11.

[0082] The second conversion device has two states; when the energy storage body 4 needs to be lifted up for energy storage, the motor 14 drives the opening and closing rod 15 to rotate upward, forming a gap with the transmission support rail 11 for the energy storage body 4 to pass through; when the energy storage body 4 needs to be released for downward power generation, the motor 14 drives the opening and closing rod 15 to move in the opposite direction and contact the transmission support rail 11, so that the energy storage body 4 can transition to the energy storage rail 1 of the lower yard when descending.

[0083] 7. Usage process

[0084] In this embodiment, the support rods 41 on both sides of the energy storage body 4 are overlapped on the transmission support rail 11 and the energy storage rail 1, and are slidably connected to the transmission support rail 11 and the energy storage rail 1 through pulleys on the support rods 41.

[0085] When using this embodiment to lift the energy storage body 4, the transmission switching gear box of the lifting power generation body is switched to the motor gear, the rotation of the motor drives the lifting sprocket 9 to rotate, the lifting sprocket 9 drives the lifting chain 5 to move, and then the relay lifting chain 17 is used to form a relay between the two lifting power generation devices. At this time, a force is applied to the energy storage body 4 with the highest potential energy in the lower yard, so that the energy storage body 4 hits a group of adjacent energy storage bodies 4, and the energy storage bodies 4 move downward along the energy storage track 1 in turn to generate electricity, until the energy storage body 4 with the lowest potential energy in the lower yard moves to the transmission support track 11, and with the movement of the lifting chain 5, the hook assembly is hung on the support rods 41 on both sides of the energy storage body 4, and the energy storage body 4 moves upward along the transmission support track 11. When the energy storage body 4 moves to the next group of lifting chains 5, the two are exchanged at the highest point where the hook assembly moves to the lifting sprocket 9, so that the energy storage body 4 transitions to another group of lifting chains 5 and continues to be lifted to the upper yard. At the highest point of the movement of the hook assembly, the hook assembly continues to move downward with the lifting sprocket 9 and separates from the energy storage body 4, and the energy storage body 4 can only continue to move along the transmission support track 11 to the energy storage track 1 of the upper yard. The first energy storage body 4 moves along the energy storage track 1 of the upper yard and is blocked by the nearest damper 3 until After blocking ten energy storage bodies 4, when the eleventh energy storage body 4 moves to the group of energy storage bodies 4, the gravity component of the eleven energy storage bodies 4 is greater than the elastic potential energy of the damper 3, and the frontmost energy storage body 4 presses the damper 3 to move forward. With the movement of more energy storage bodies 4, the energy storage bodies 4 move to the tail end of the energy storage track 1 in turn, and transition to the next energy storage track 1 through the L-shaped outer chain plate 231 on the track conversion power generation device 2. When transitioning downward, the energy storage body 4 is blocked by the energy storage track 1 below, and the L-shaped outer chain plate 231 continues to move downward and separates from the energy storage body 4. During the downward transition, the energy storage body 4 drives the chain 23 to move, the chain 23 drives the sprocket 22 to move, and the sprocket 22 drives the generator 24 to generate electricity, and the cycle is repeated until all the energy storage bodies 4 are stored on the energy storage track 1. Since no new energy storage bodies 4 are added later, the lowest energy storage track 1 can prevent it from continuing to move through the damper 3, thereby completing the lifting and storage of the energy storage body 4.

[0086] When using this embodiment to generate electricity, the transmission switching gear box of the lifting power generation body is switched to the generator gear, and a force is applied to the energy storage body 4 with the highest potential energy in the upper yard, so that it moves and generates electricity in the same way as the energy storage body 4 in the lower yard, until the energy storage body 4 with the lowest potential energy moves along the upper yard energy storage track 1 through the first conversion device to the transmission support track 11, and descends along the transmission support track 11. While descending, it is blocked by the hook assembly, driving the lifting chain 5 to move in the opposite direction, and the lifting chain 5 drives the generator to generate electricity. When the energy storage body 4 moves to the second conversion device, the pneumatic clutch 13 holds the rotating shaft, and the sprocket assembly 10 on the lifting power generation device drives the rotating shaft to rotate, so that the rotating bracket 11 drives the bearing seat, the relay lifting sprocket 16 and the relay lifting chain 17 to rotate upward, leaving a gap for the movement of the energy storage body 4, so that the energy storage body 4 transitions to the transmission support track 11. When the energy storage body 4 moves to the second conversion device, the motor 14 drives the opening and closing rod 15 to rotate to a position in contact with the transmission support track 11, so that the energy storage body 4 can be smoothly transferred to the lower yard, and the energy storage body 4 can be stored in the lower yard in the same way as the storage method of the upper yard.

[0087] Example 2 A high-efficiency gravity energy storage power generation system

[0088] The structure of this embodiment is basically the same as that of embodiment 1, except for the structure of the energy storage track 1. The energy storage track 1 of this embodiment may be a steel rail or a steel wire rope, and both ends of the steel rail or steel wire rope are supported by scaffolding or columns.

[0089] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-efficiency gravity energy storage power generation system, characterized in that: It includes energy storage, two stockpiles, lifting power generation device and control device. The two stockpiles have the same structure, one is located at a high altitude and is called the upper stockpiles, and the other is located at a low altitude and is called the lower stockpiles. The stacking yard includes a plurality of energy storage rails, each of which is inclined to form a structure that is continuously bent in the vertical direction. Two adjacent energy storage rails are connected end to end through a rail conversion power generation device. A plurality of dampers for limiting the movement speed and position of the energy storage body are arranged at intervals on the energy storage rails. The track conversion power generation device comprises a frame, a sprocket chain assembly rotatably connected to the frame, and a power generation assembly for energy conversion, the power input end of the power generation assembly is assembled and connected with the sprocket chain assembly, the chain intervals in the sprocket chain assembly have an outer chain plate of the same length in an L-shape, the L-shaped outer chain plate intersects with the projection of the energy storage track, so that the energy storage body is transitioned from the high-position energy storage track to the low-position energy storage track through the L-shaped outer chain plate; A transmission support track is provided between the upper stockyard and the lower stockyard, one end of the transmission support track is connected to an energy storage track with the highest altitude in the upper stockyard, and the other end is connected to an energy storage track with the lowest altitude in the lower stockyard, and the energy storage track with the lowest altitude in the upper stockyard is connected to the transmission support track through a first conversion device, and the energy storage track with the highest altitude in the lower stockyard is connected to the transmission support track through a second conversion device; The energy storage body is slidably arranged on the energy storage track and the transmission support track; There are multiple lifting power generation devices, which adopt an interlaced relay structure. The lifting power generation devices at both ends correspond to the two ends of the transmission support track, and are used to drive the energy storage body to move from the lower yard to the upper yard along the transmission support track to store energy, and drive the lifting power generation device to generate electricity when the energy storage body moves downward.

2. A high-efficiency gravity energy storage power generation system according to claim 1, characterized in that: The inclination of the energy storage track to the horizontal ground is 1-5°.

3. A high-efficiency gravity energy storage power generation system according to claim 2, characterized in that: The damper comprises a damping plate fixed on the energy storage track, and the damping plate is arranged to be inclined upward along the moving direction of the energy storage body, and the material of the damping plate is spring steel.

4. A high-efficiency gravity energy storage power generation system according to any one of claims 1 to 3, characterized in that: The lifting power generation device comprises two lifting power generation bodies and two lifting chains; The lifting power generation body comprises a bracket, two rotating shafts rotatably arranged on the bracket and a transmission switching gear box respectively connected to the two rotating shafts, the two rotating shafts are arranged at intervals, the two rotating shafts are connected to the transmission switching gear box through a sprocket assembly, and the transmission switching gear box is respectively connected to the motor and the generator; a lifting sprocket is fixedly arranged on each rotating shaft of the lifting power generation body, the two lifting sprockets on one side of the two lifting power generation bodies are sleeved with a lifting chain, and the two lifting sprockets on the other side of the two lifting power generation bodies are sleeved with another lifting chain; The two rotating shafts of the lifting power generation body are respectively equipped with a relay lifting sprocket, and the two relay lifting sprockets are both sleeved with a relay lifting chain. The two relay lifting chains are located on the inner side of the lifting chain to realize the relay staggered connection of the two lifting power generation devices; a number of hook components for hanging the two sides of the energy storage body are evenly spaced on the lifting chain.

5. A high-efficiency gravity energy storage power generation system according to claim 4, characterized in that: The hook assembly includes an L-shaped first hook and a T-shaped second hook; the first hook includes a first fixing plate and a first blocking plate fixedly mounted on the first fixing plate, the first fixing plate is fixedly mounted on an outer link plate of the lifting chain; the second hook includes a second fixing plate and a second blocking plate fixedly mounted on the second fixing plate, one end of the second fixing plate is fixedly mounted on the outer link plate on which the first fixing plate is mounted, and the other end is fixedly mounted on another outer link plate adjacent to the outer link plate; The first blocking plate and the second blocking plate overlap each other, and the included angle between the second blocking plate and the second fixing plate is smaller than the included angle between the first blocking plate and the first fixing plate.

6. A high-efficiency gravity energy storage power generation system according to claim 5, characterized in that: Hook components are fixedly arranged on the outer chain plates at corresponding positions on the inner and outer sides of the lifting chain.

7. A high-efficiency gravity energy storage power generation system according to claim 5 or 6, characterized in that: The included angle between the first fixing plate and the first blocking plate is 60°, and the included angle between the second fixing plate and the second blocking plate is 40°.

8. The high-efficiency gravity energy storage power generation system according to claim 4, characterized in that: The first conversion device includes a rotating bracket and two pneumatic clutches, the two pneumatic clutches are respectively mounted on the rotating shafts of two lifting power generation bodies, the lifting power generation bodies on which the two pneumatic clutches are installed are two of the energy storage tracks with the lowest altitude closest to the upper yard, and the pneumatic clutches are located on the rotating shafts on which two relay lifting sprockets are installed, the two ends of the rotating bracket are respectively fixed on the two pneumatic clutches, the bearing seat for mounting the rotating shaft on the lifting power generation body with the lower altitude of the two lifting power generation bodies is movably arranged on the lifting power generation body; the transmission support track is disconnected between the lifting power generation bodies, and a transmission support track is formed on one side of the rotating bracket between the lifting power generation bodies, filling the disconnected part of the transmission support track, so that the lifted part of the transmission support track is a straight line.

9. A high-efficiency gravity energy storage power generation system according to claim 8, characterized in that: The second conversion device includes an opening and closing rod hinged on the lower yard energy storage track and a motor for driving the opening and closing rod to rotate around a hinge point, and one end of the opening and closing rod not connected to the energy storage track is in contact with the transmission support track.

10. A high-efficiency gravity energy storage power generation system according to any one of claims 1-3, 5, 6, 8, and 9, characterized in that: The energy storage track comprises two steel rails, round tubes or steel wire ropes which are spaced apart and used to support two sides of the energy storage body.

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