A gravity block group and gravity compressed air energy storage system for preventing impact load

Abstract

The present invention proposes a gravity block group and a gravity compressed air energy storage system that are resistant to impact loads. The gravity block group includes multiple gravity pressure block units, emergency brake components and anti-impact components that are stacked in layers in the vertical direction, wherein the gravity pressure block unit includes a first gravity pressure block and multiple accommodating chambers surrounded by partitions above the first gravity pressure block; and a second gravity pressure block is arranged in the accommodating chamber; the anti-impact components are symmetrically arranged on both sides of the first gravity pressure block, and in the vertical direction, the two ends of the anti-impact components are respectively arranged on adjacent first gravity pressure blocks, and when the gravity block group tilts, one end of the anti-impact component falls off from the first gravity pressure block and pops out toward the side of the first gravity pressure block fixed to the other end of the anti-impact component, thereby reducing the impact load on the first gravity pressure block and preventing the structure of the gravity block group from being seriously damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a gravity block group and a gravity compressed air energy storage system that are resistant to impact loads. Background Art

[0002] Gravity-based compressed air energy storage systems store excess electrical energy by compressing air. When needed, the high-pressure air is released through an expander to generate electricity. During energy storage, the compressed air storage system consumes electricity to compress the air and store it in a storage chamber. During energy release, the high-pressure air is released from the storage chamber and enters a combustion chamber, where it is heated by fuel combustion to generate electricity. Alternatively, the system can be used to heat the air without fuel combustion, recovering the heat of compression. Compressed air energy storage systems can be used to construct large power plants exceeding 100 MW, second only to pumped-storage power plants. They offer advantages such as a long energy storage cycle, low unit investment, a long lifespan, and high efficiency. Combining the high energy density of compressed air energy storage with the flexible layout of gravity energy storage, and further improving upon it, the proposed gravity-based compressed air energy storage technology features a safe and economical counterweight structure. Traditional gravity-based ballasts are assembled from multiple ballasts arranged in a specific orientation. This poses a risk of tilting or falling during movement. Furthermore, tilting of the ballasts can shift their center of gravity, potentially damaging the ballast structure. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the purpose of the present invention is to propose a gravity block group and gravity compressed air energy storage system that are resistant to impact loads, wherein the gravity block group directly adopts an effective assembly form, which controls the tilting or falling off of traditional compression blocks during movement to a certain extent, ensuring safety; and can ensure that the center of gravity of the gravity block group is always in the same vertical direction during movement, ensuring the safe and stable operation of the gravity block group; and anti-impact components are arranged on the surrounding sides of the gravity block group. During the tilting or falling of the gravity block group, the anti-impact components can effectively reduce the impact load of the gravity block group, prevent the structure of the gravity block group from being seriously damaged, and realize the concept of safe, efficient and stable energy storage.

[0005] To achieve the above object, the present invention proposes a multifunctional gravity block group for resisting impact loads, comprising:

[0006] Gravity pressing block units; multiple and stacked in layers in the vertical direction; the gravity pressing block units include a first gravity pressing block and multiple accommodating chambers surrounded by partitions above the first gravity pressing block; and second gravity pressing blocks are arranged in the accommodating chambers; the multiple second gravity pressing blocks are evenly arranged above the first gravity pressing block and maintain the same vertical direction as the center of gravity of the first gravity pressing block;

[0007] an emergency brake assembly connected to the top of the weight block assembly and used for emergency braking when the weight block assembly falls over; and

[0008] The anti-impact component includes multiple components, which are located on both sides of the first gravity pressure block symmetrically, and the two ends of the components are respectively arranged on the first gravity pressure blocks adjacent to each other in the vertical direction; when the gravity block group falls over, one end of the anti-impact component falls off from the first gravity pressure block and pops out toward the side of the first gravity pressure block fixed to the other end of the anti-impact component, thereby reducing the impact load on the first gravity pressure block.

[0009] In some embodiments, one end of the impact-proof component is connected to the first gravity pressing block, and the other end thereof is snap-connected to an annular ear piece on the first gravity pressing block adjacent to it in the vertical direction.

[0010] In some embodiments, the impact-proof assembly includes a first flexible arm arranged horizontally, a second flexible arm arranged vertically, and a claw assembly; wherein the first flexible arm is vertically connected to the second flexible arm through a ball-and-screw coupling; a spring member is arranged between the first flexible arm and the second flexible arm; and the spring member is in a compressed state when the first flexible arm is perpendicular to the second flexible arm; the claw assembly is located at one end of the second flexible arm away from the first flexible arm, and is snap-connected to the annular ear member on the adjacent first gravity pressure block.

[0011] In some embodiments, the upper end of the claw assembly is plug-connected to the second flexible support arm; it includes a movable plate, a sleeve, an elastic member and a claw hand; wherein the movable plate is arranged in the sleeve and slides along the sleeve, and at least two elastic members are arranged under the movable plate, and a claw hand is arranged at the bottom of each elastic member; the middle part of the claw hand is movably connected to the bottom end of the sleeve; multiple claw hands are buckled on the annular ear piece.

[0012] In some embodiments, a frosting pad is provided on the outer side of the second flexible arm to protect the second flexible arm and increase the contact friction of the second flexible arm.

[0013] In some embodiments, a fixed plate is provided at the bottom end of the second flexible support arm, and a telescopic rod is provided below the fixed plate. The telescopic rod extends into the sleeve and is located above the movable plate. The telescopic rod is in contact with and connected to the movable plate, and is used to push the movable plate to slide in the sleeve.

[0014] In some embodiments, the second gravity pressure block is fixed in the accommodating chamber by the pressure block pin; a plurality of grooves are set at the bottom of the first gravity pressure block; and a plurality of gravity pressure block units are stacked in layers in the vertical direction by connecting the shaft pin and cooperating with the grooves.

[0015] In some embodiments, the present invention provides a gravity compressed air energy storage system, comprising:

[0016] a vertical shaft, wherein a gravity assembly is movably inserted in the vertical shaft, a gap is defined between an outer wall of the gravity assembly and an inner wall of the vertical shaft, a sealing membrane is provided in the gap, and the sealing membrane is sealedly connected to the outer wall of the gravity assembly and the inner wall of the vertical shaft, so that an air storage chamber is enclosed by the sealing membrane, a space of the vertical shaft below the sealing membrane, and the gravity assembly;

[0017] The gravity assembly includes the gravity block group and the pressure-bearing assembly in any of the above embodiments; wherein the gravity block group is arranged on the top of the pressure-bearing assembly; the bottom of the pressure-bearing assembly extends into the vertical shaft and its outer wall is connected to the sealing membrane; the top of the pressure-bearing assembly is located on the ground at the top of the vertical shaft.

[0018] In some embodiments, the pressure-bearing assembly includes a pressure-bearing cylinder and a pressure-bearing base; wherein the bottom of the pressure-bearing cylinder extends into the vertical shaft and a pressure-bearing base is provided on the top; the gravity block group is located above the pressure-bearing base, so that when the pressure-bearing cylinder moves downward to the lowest limit, it is supported on the ground at the top of the vertical shaft by the pressure-bearing base.

[0019] In some embodiments, the energy storage system includes a guide device, which includes a guide groove and a roller; wherein a plurality of guide grooves are provided, and the plurality of guide grooves are distributed on the inner wall of the shaft or outside the shaft; the roller cooperates with the guide groove and is connected to the bottom of the guide groove, so that when the gravity assembly moves up and down, the roller moves up and down along the bottom of the guide groove.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1 1 is a structural diagram of a gravity block group proposed in one embodiment of the present invention;

[0023] Figure 2 1 is a schematic structural diagram of an anti-impact assembly proposed in one embodiment of the present invention;

[0024] Figure 3 1 is a schematic structural diagram of a claw assembly according to an embodiment of the present invention;

[0025] Figure 4 1 is a structural diagram of a gravity compressed air energy storage system proposed in one embodiment of the present invention;

[0026] In the figure, 1. soil layer; 2. vertical shaft; 3. sealing membrane; 4. air storage chamber; 5. pressure cylinder; 6. pressure base; 7. tower structure; 8. guide device; 9. anti-impact component; 91. first flexible support arm; 92. second flexible support arm; 921. fixed plate; 922. telescopic rod; 93. claw assembly; 931. movable plate; 932. sleeve; 933. elastic member; 934. claw hand; 94. ball-and-hook coupling; 95. spring member; 10. crane; 11. emergency brake assembly; 12. gravity pressure block unit; 121. second gravity pressure block; 122. first gravity pressure block; 123. connecting shaft pin; 124. pressure block pin; 16. annular ear piece. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0028] See also Figure 1-Figure 3 A multifunctional gravity block group for resisting impact loads proposed in one embodiment of the present invention includes a gravity pressure block unit 12, an emergency brake component 11 and an anti-impact component 9; wherein the gravity pressure block unit 12 is multiple and is stacked in layers in the vertical direction; wherein the gravity pressure block unit 12 is arranged in a plurality of stacked assembly forms, thereby reducing the weight of each gravity pressure block unit 12, thereby reducing the difficulty of lifting while meeting the requirements of large energy storage.

[0029] Preferably, in order to ensure that the center of gravity of the stacked gravity pressure block units 12 always remains in the same vertical direction, the gravity pressure block unit 12 in this embodiment includes a first gravity pressure block 122 and a plurality of accommodating chambers surrounded by partitions above the first gravity pressure block 122; wherein the second gravity pressure block 121 is fixed in the accommodating chamber by a pressure block pin 124, wherein the plurality of second gravity pressure blocks 121 are evenly distributed above the first gravity pressure block 122 and maintain the same vertical direction as the center of gravity of the first gravity pressure block 122.

[0030] In this embodiment, a plurality of grooves can be provided at the bottom of each first gravity pressing block 122, and a connecting shaft pin 123 adapted to the grooves is vertically provided in the middle of the second gravity pressing block 121, so that the second gravity pressing block 121 and the first gravity pressing block 122 above it are stacked, thereby ensuring the stacked structure of the gravity pressing block units 12, effectively controlling the displacement of the gravity pressing block units 12 during the lifting process, ensuring that the center of gravity of the plurality of gravity pressing block units 12 is in the same vertical direction, and avoiding excessive load on other nearby structures.

[0031] For example, Figure 1 As shown, from bottom to top, four accommodating chambers surrounded by partitions are provided on the top of the first gravity pressing block 122. Four upwardly protruding pressing block pins 124 are provided on the top of the first gravity pressing block 122, and the four pressing block pins 124 are distributed inside the four accommodating chambers, that is, the projection of the pressing block pins 124 on the accommodating chamber is located in the middle of the four accommodating chambers, so that the multiple second gravity pressing blocks 121 are always in the same vertical direction with the center of gravity of the first gravity pressing block 122. It can be understood by those skilled in the art that grooves are provided on the bottom of the first gravity pressing block 122. Preferably, there are four grooves, each of which corresponds to the four accommodating chambers above the first gravity pressing block 122 and coincides with the projection of the pressing block pins 124 on the first gravity pressing block 122. The grooves cooperate with the connecting shaft pins 123 vertically provided on the second gravity pressing block 121 to achieve the center of gravity of the multiple gravity pressing block units 12 in the same vertical direction.

[0032] In practical applications, to facilitate the arrangement of the block pin 124, the groove, and the connecting pin 123, the second and first gravity blocks 121 and 122 of this embodiment are cast from high-density scrap iron ore. The transverse cross-sections of the second and first gravity blocks 121 and 122 can be polygonal or circular, and each block is composed of independent cubes, cylinders, or special-shaped blocks. The cross-sectional dimensions of the connecting pin 123 are smaller than the cross-sectional dimensions of the groove. This embodiment can effectively reduce the height of the assembled gravity assembly, thereby also reducing the height and cost of the guide structure and tower structure 7 that control the gravity assembly. For example, under a 10 MPa air chamber pressure in the air storage chamber 4, the gravity block group includes 7 gravity block groups, each of which includes 5 gravity block units 12. The gravity block units 12 each weigh 150 tons, of which the first gravity block 122 weighs 100 tons and the second gravity block 121 weighs 50 tons.

[0033] The specific steps for hoisting the gravity block group in this embodiment are as follows: First, the second gravity block 121 is aligned with the block pin 124 in the accommodating chamber above the first gravity block 122 to preliminarily hoist the multiple second gravity blocks 121. It can be understood that a through hole is set in the middle of the second gravity block 121 to match the second gravity block 121; secondly, the groove on the first gravity block 122 is carefully aligned with the connecting shaft pin 123 on the second gravity block 121 and their relative positions are fine-tuned so that the center of gravity of the first gravity block 122 and the second gravity block 121 are located in the same vertical direction. The combination of the block pin 124, the groove and the connecting shaft pin 123 in this embodiment ensures that the influence of the center of gravity position offset of each gravity block unit 12 is minimized during the operation of the gravity block group. Moreover, the weight of the second gravity pressure block 121 can be flexibly adjusted according to the multiple accommodating chambers surrounded by the partition to achieve the purpose of adjusting the total weight of the gravity block group. While ensuring the balance of the gravity block group, different combinations of the first gravity pressure block 122 and the second gravity pressure block 121 can meet the effective gas storage volume requirements in a wider range.

[0034] In addition, it should be noted that the height of each pressure block pin 124 does not exceed the height of the accommodating chamber, the height of the connecting shaft pin 123 does not exceed the height of the first gravity pressure block 122, and the height of the connecting shaft pin 123 is adapted to the depth of the groove.

[0035] In some embodiments, the emergency brake assembly 11 can be understood as a brake, wherein the top of the gravity block group is connected to the crane 10 on which the brake is installed through a lifting rope, wherein the brake is arranged at the upper end of the lifting rope. Under the normal lifting and lowering operation conditions of the gravity block group, the tension between the lifting rope and the gravity block group is zero. When the self-balancing of the gravity block group fails and causes the gravity pressure block unit 12 to suddenly fall, the brake opens instantaneously and locks the 300t gravity pressure block unit 12 on the upper part of the gravity block group to reduce the impact load caused by the sudden tilt of the gravity block group and the falling of the gravity pressure block unit 12, which can effectively reduce the impact range of extreme hazards and ensure safe and stable operation.

[0036] In some embodiments, there are multiple anti-impact components 9, wherein the anti-impact components 9 are symmetrically arranged on both sides of the first gravity pressing block 122; Figure 2As shown, the impact protection assembly 9 includes a first flexible arm 91 arranged horizontally, a second flexible arm 92 arranged vertically, and a claw assembly 93. The first flexible arm 91 is arranged horizontally, with one end connected to the first gravity pressure block 122 and located outside the first gravity pressure block 122. The second flexible arm 92 is connected to the other end of the first flexible arm 91 via a ball-and-hook coupling 94, so that the second flexible arm 92 and the first flexible arm 91 are arranged perpendicularly. A spring member 95 is provided between the middle of the first flexible arm 91 and the middle of the second flexible arm 92. When the first flexible arm 91 and the second flexible arm 92 are perpendicular, the spring member 95 is compressed. The claw assembly 93 is provided at the end of the second flexible arm 92 away from the first flexible arm 91 and is connected to the first gravity pressure block 122 adjacent in the vertical direction, maintaining the second flexible arm 92 and the first flexible arm 91 in a perpendicular position and the spring member 95 in a compressed state. It can be understood that in order to keep the second flexible support arm 92 and the first flexible support arm 91 vertically arranged, an annular ear piece 16 can be set on the outer side of the adjacent first gravity pressure block 122, and the claw assembly 93 is used to snap-connect with the annular ear piece 16; wherein the length of the annular ear piece 16 is equal to the length of the first flexible support arm 91.

[0037] In this embodiment, the upper end of the claw assembly 93 is plug-in connected to the second flexible support arm 92, that is, the upper end of the claw assembly 93 is sleeved on the outside of one end of the second flexible support arm 92. Its main function is that when the gravity block group tilts, the claw assembly 93 is separated from the second flexible support arm 92, and under the elastic force of the spring member 95, the second flexible support arm 92 pops out around the first flexible support arm 91 to the outside of the first gravity pressure block 122, thereby avoiding contact between the first gravity pressure block 122 and the surrounding rigid structure, reducing the impact load on the first gravity pressure block 122 and preventing structural damage to the first gravity pressure block 122.

[0038] It should be noted that the superposition and connection of the first gravity pressure block 122 and the second gravity pressure block 121 in the gravity block group are mainly achieved by the combination of pins, grooves and connecting shaft pins 123. The claw assemblies 93 are respectively arranged on the first gravity pressure blocks 122 adjacent to each other in the vertical direction at both ends of the structure. However, since the upper end of the claw assembly 93 is plug-in connected to the second flexible support arm 92, its connection strength is only slightly greater than the compressive elastic force of the compressed spring member 95. When the gravity block group tilts, the connection strength between the claw assembly 93 and the second flexible support arm 92 cannot withstand the weight of the first gravity pressure block 122 falling off, thereby causing the claw assembly 93 to fall off the second flexible support arm 92, and the second flexible support arm 92 is ejected by the elastic force of the spring member 95 and contacts the rigid structure on the surrounding side. Preferably, a frosted pad is provided on the outer side of the second flexible support arm 92. The provision of the frosted pad can not only protect the second flexible support arm 92, but also increase the contact friction of the second flexible support arm 92, slowing down the falling speed of the first gravity pressure block 122, which can not only further reduce the impact load on the first gravity pressure block 122 but also provide a short time for timely adjustment of the operating conditions.

[0039] For example, Figure 3 As shown, the claw assembly 93 includes a movable plate 931, a sleeve 932, an elastic member 933 and a claw hand 934; wherein the movable plate 931 is arranged in the sleeve 932, and a fixed plate 921 is arranged above the movable plate 931, that is, at the bottom end of the second flexible support arm 92, and a telescopic rod 922 is arranged between the fixed plate 921 and the movable plate 931, wherein the telescopic rod 922 can be an electronic telescopic rod 922, and the operation and maintenance personnel control the extension of the telescopic rod 922 so that the bottom end of the telescopic rod 922 and the movable plate 931 are aligned. 31 contacts and connects, pushing the movable plate 931 to slide downward within the sleeve 932. The bottom end of the movable plate 931 is connected to multiple elastic members 933, and the bottom end of each elastic member 933 is provided with a claw 934; the middle portion of the claw 934 is hinged to the bottom of the sleeve 932. As the movable plate 931 continues to slide downward, the multiple elastic members 933 are compressed and push one end of the claw 934 downward, causing the other end of the claw 934 to move upward, causing the claw 934 to open. When the telescopic rod 922 contracts, the elastic member 933 slides upward within the sleeve 932 due to its own elastic force, and the multiple claws 934 simultaneously cooperate to complete the connection between the claw assembly 93 and the annular ear member 16.

[0040] Therefore, it can be known that the main function of the anti-impact component 9 is to use the anti-impact component 9 to contact the surrounding structure when the self-balancing failure of the gravity block group causes the gravity pressure block unit 12 to suddenly fall, so as to prevent the gravity pressure block unit 12 from directly contacting the rigid structure on the surrounding side, causing the structure of the gravity pressure block unit 12 to be destroyed and causing heavy economic losses; for the purpose of comprehensive protection, the anti-impact component 9 may include multiple and circumferentially arranged on the first gravity pressure block 122, but in actual production, the guide device 8 needs to be arranged on the surrounding side of the gravity block group, and the anti-impact component 9 is symmetrically arranged on both sides of the first gravity pressure block 122, and avoiding the position where the guide device 8 is set to achieve the purpose of preventing the gravity pressure block unit 12 from directly contacting the rigid structure on the surrounding side.

[0041] In some embodiments, a gravity compressed air energy storage system is proposed. Figure 4 As shown, it includes a vertical shaft 2, wherein the vertical shaft 2 is dug downward in the soil layer 1, and a gravity component is movably inserted in the vertical shaft 2. There is a gap between the outer wall of the gravity component and the inner wall of the vertical shaft 2, and a sealing membrane 3 is provided in the gap. The sealing membrane 3 is sealedly connected to the outer wall of the gravity component and the inner wall of the vertical shaft 2, so that the sealing membrane 3, the space below the sealing membrane 3 of the vertical shaft 2, and the gravity component form an air storage chamber 4. In this embodiment, the gravity compressed air energy storage system includes an air compressor unit and an air expansion unit; during the energy storage process, electric energy drives the air compressor unit to work, and the air compressor unit introduces compressed air into the air storage chamber 4. The pressure of the compressed air pushes the gravity component to move upward. When releasing energy, the compressed air in the air storage chamber 4 is introduced into the air expansion unit, driving the air expansion unit to work and realize power generation.

[0042] In this embodiment, the gravity assembly includes the gravity block group and the pressure-bearing assembly in any of the above embodiments; wherein the gravity block group is arranged at the top of the pressure-bearing assembly; the bottom of the pressure-bearing assembly extends into the vertical shaft 2 and its outer wall is connected to the sealing membrane 3; the top of the pressure-bearing assembly is located on the ground at the top of the vertical shaft 2; wherein the gravity block group includes a plurality of gravity pressure block units 12 stacked in layers in the vertical direction, wherein each adjacent gravity pressure block unit 12 is respectively provided with a pressure block pin 124, so that the center of gravity of the plurality of gravity pressure block units 12 is always in the same vertical direction.

[0043] The gravity assembly is divided into two parts: an above-ground gravity block group and a pressure-bearing assembly. The bottom end of the pressure-bearing assembly extends into the interior of the shaft 2 and the sealing membrane 3 is directly connected to the bottom end of the outer wall of the pressure-bearing assembly, while the gravity block group is located outside the shaft 2. When achieving large energy storage, there is no need to concentrate all the gravity blocks in the shaft 2, which can reduce the height of the shaft 2 and greatly reduce the excavation workload and engineering difficulty of the shaft 2.

[0044] In some embodiments, the pressure-bearing assembly includes a pressure-bearing cylinder 5 and a pressure-bearing base 6; the bottom of the pressure-bearing cylinder 5 extends into the vertical shaft 2 and the pressure-bearing base 6 is set on the top; the gravity block group is located above the pressure-bearing base 6, so that when the pressure-bearing cylinder 5 moves downward to the lowest limit, it is supported on the ground at the top of the vertical shaft 2 by the pressure-bearing base 6.

[0045] The pressure-bearing component includes a pressure-bearing cylinder 5 and a pressure-bearing base 6, wherein the bottom end of the pressure-bearing cylinder 5 extends into the interior of the vertical shaft 2, and the sealing membrane 3 is directly connected to the bottom end of the outer wall of the pressure-bearing cylinder 5, and the top of the pressure-bearing cylinder 5 is located on the ground at the top of the vertical shaft 2 and is connected to the pressure-bearing base 6. Multiple gravity pressure block units 12 stacked in layers in the vertical direction are arranged above the pressure-bearing base 6, so that the center of gravity of the multiple gravity pressure block units 12 is always in the same vertical direction.

[0046] In some embodiments, the energy storage system includes a guide device 8, which includes a guide groove and a roller; wherein a plurality of guide grooves are provided, and the plurality of guide grooves are distributed around the gravity assembly, and the guide grooves are provided on the inner wall of the shaft 2 or outside the shaft 2; the roller cooperates with the guide groove and is connected to the bottom of the guide groove, so that when the gravity assembly moves up and down, the roller moves up and down along the bottom of the guide groove.

[0047] Specifically, multiple guide grooves are provided, distributed around the gravity assembly, and arranged on the inner wall of the shaft 2 or outside the shaft 2. In other words, the guide grooves can be arranged inside or outside the shaft 2. Multiple rollers are provided, each mounted on the gravity assembly via a rotating shaft. The rollers are connected to the bottom of the guide grooves, so that when the gravity assembly moves up and down, the rollers move up and down along the bottom of the guide grooves.

[0048] It is understandable that Figure 4 As shown, when the gravity assembly is located in the vertical shaft 2 and moves during the energy storage process, a plurality of guide grooves can be provided on the inner wall of the vertical shaft 2. For example, four guide grooves can be provided, and the four guide grooves can be provided at equal angles on the inner wall of the vertical shaft 2. Since the roller on the gravity assembly is installed on the outer side of the gravity assembly through the rotating shaft, the roller can rotate on the gravity assembly. When the roller is in contact with the bottom of the guide groove, not only can the guide groove be used for position limiting, but the guide groove cooperates with the roller to constrain the movement direction of the gravity assembly. At the same time, the gravity assembly moves vertically upward or downward along the guide groove at a certain rate. Lubricant, such as butter or graphite, is regularly added to the contact position between the guide groove and the roller to reduce friction and improve the conversion rate of gravitational potential energy.

[0049] In addition, there is another possibility that multiple tower structures 7 are set on the ground outside the top of the shaft 2, and the multiple tower structures 7 are distributed around the side of the shaft 2, and multiple guide grooves are respectively installed on the multiple tower structures 7, that is, four tower structures 7 can be set, and then the four guide grooves are set on the four tower structures 7 outside the shaft 2. The guide device 8 is installed between the gravity block group and the tower structure 7 opposite to the gravity block group, and the guide device 8 is set to avoid the anti-impact component 9, wherein a gap is reserved between the outer wall of the gravity block group and the inner wall of the tower, so that the ground gravity block group and the pressure cylinder 5 can move up and down along the guide groove through the roller during the up and down movement. When the gravity block group falls, the second flexible support arm 92 of the anti-impact component 9 pops out and contacts the guide groove or tower structure around the gravity block group, reducing the impact load on the first gravity pressure block 122.

[0050] In some embodiments, a steel lining 15 is provided on the inner wall of the shaft 2, and the sealing membrane 3 is connected to the inner wall of the steel lining 15. The provision of the steel lining 15 can improve the sealing performance of the connection with the sealing membrane 3.

[0051] In addition, it should be noted that the pressure tube 5 is filled with sand.

[0052] It can be understood that the pressure tube 5 can be a cylindrical structure surrounded by steel plates with a hollow structure inside. The reduced weight makes lifting easier. In addition, filling the pressure tube 5 with sand can increase the gravity of energy storage.

[0053] It should be noted that, in the description of the present invention, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0054] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A gravity compressed air energy storage system, characterized in that: include a vertical shaft, wherein a gravity assembly is movably inserted in the vertical shaft, a gap is defined between an outer wall of the gravity assembly and an inner wall of the vertical shaft, a sealing membrane is provided in the gap, and the sealing membrane is sealedly connected to the outer wall of the gravity assembly and the inner wall of the vertical shaft, so that an air storage chamber is enclosed by the sealing membrane, a space of the vertical shaft below the sealing membrane, and the gravity assembly; The gravity assembly includes a gravity block group and a pressure-bearing assembly; The gravity block group is arranged on the top of the pressure-bearing component; the bottom of the pressure-bearing component extends into the vertical shaft and the outer wall thereof is connected to the sealing membrane; the top of the pressure-bearing component is located on the ground at the top of the vertical shaft; The gravity block group includes a gravity pressure block unit, an emergency brake assembly and an anti-impact assembly; the gravity pressure block units are multiple and stacked in layers in the vertical direction; the gravity pressure block unit includes a first gravity pressure block and a plurality of accommodating chambers surrounded by partitions above the first gravity pressure block; and a second gravity pressure block is arranged in the accommodating chamber; The plurality of second gravity pressing blocks are evenly arranged above the first gravity pressing block and maintain the same vertical direction as the center of gravity of the first gravity pressing block; An emergency brake assembly is connected to the top of the gravity block group and is used for emergency braking when the gravity block group tips over; an anti-impact assembly includes a plurality of anti-impact assemblies, which are symmetrically arranged on both sides of the first gravity pressure block, and in the vertical direction, the two ends of the anti-impact assembly are respectively arranged on adjacent first gravity pressure blocks; when the gravity block group tips over, one end of the anti-impact assembly falls off from the first gravity pressure block and pops out toward the peripheral side of the first gravity pressure block fixed to the other end of the anti-impact assembly, thereby reducing the impact load on the first gravity pressure block.

2. The energy storage system according to claim 1, characterized in that One end of the impact-proof component is connected to the first gravity pressing block, and the other end is snap-connected to the annular ear piece on the first gravity pressing block adjacent to it in the vertical direction.

3. The energy storage system according to claim 2, characterized in that: The anti-impact assembly includes a first flexible arm arranged horizontally, a second flexible arm arranged vertically and a claw assembly; wherein the first flexible arm is vertically connected to the second flexible arm through a ball-and-screw coupling; a spring member is arranged between the first flexible arm and the second flexible arm; and the spring member is in a compressed state when the first flexible arm is perpendicular to the second flexible arm; the claw assembly is located at one end of the second flexible arm away from the first flexible arm, and is snap-connected to the annular ear member on the adjacent first gravity pressure block.

4. The energy storage system according to claim 3, characterized in that The upper end of the claw assembly is plug-in connected to the second flexible support arm; it includes a movable plate, a sleeve, an elastic member and a claw hand; wherein the movable plate is arranged in the sleeve and slides along the sleeve, and at least two elastic members are arranged below the movable plate, and a claw hand is arranged at the bottom of each elastic member; the middle part of the claw hand is movably connected to the bottom end of the sleeve; multiple claw hands are buckled on the annular ear piece.

5. The energy storage system according to claim 3, characterized in that: An abrasive pad is provided on the outer side of the second flexible support arm to protect the second flexible support arm and increase the contact friction force of the second flexible support arm.

6. The energy storage system according to claim 4, characterized in that: A fixed plate is provided at the bottom end of the second flexible support arm, and a telescopic rod is provided below the fixed plate. The telescopic rod extends into the sleeve and is located above the movable plate. The telescopic rod is in contact with and connected to the movable plate, and is used to push the movable plate to slide in the sleeve.

7. The energy storage system according to any one of claims 1 to 6, characterized in that: The second gravity pressing block is fixed in the accommodating chamber by the pressing block pin; a plurality of grooves are provided at the bottom of the first gravity pressing block; and a plurality of the gravity pressing block units are stacked in layers in the vertical direction by connecting axle pins and cooperating with the grooves.

8. The energy storage system according to claim 7, characterized in that: The pressure-bearing assembly includes a pressure-bearing cylinder and a pressure-bearing base; wherein the bottom of the pressure-bearing cylinder extends into the vertical shaft and a pressure-bearing base is provided on the top of the pressure-bearing cylinder; the gravity block group is located above the pressure-bearing base, so that when the pressure-bearing cylinder moves downward to the lowest limit, it is supported on the ground at the top of the vertical shaft by the pressure-bearing base.

9. The energy storage system according to claim 8, characterized in that: The energy storage system includes a guide device, which includes a guide groove and a roller; wherein a plurality of guide grooves are provided, and the plurality of guide grooves are distributed on the inner wall of the vertical shaft or outside the vertical shaft; the roller cooperates with the guide groove and is connected to the bottom of the guide groove, so that when the gravity component moves up and down, the roller moves up and down along the bottom of the guide groove.

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