Corrugated joint structure of gas storage chamber lining, lining structure and gas storage chamber
By adopting a corrugated joint structure in the gas storage chamber, the problem of the concrete lining prone to cracks under high pressure and temperature cycles is solved, and the stability and sealing of the structure are achieved.
Patent Information
- Application Number
- CN202422906892.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The concrete lining structure of the existing gas storage chamber is prone to cracks and damage caused by pressure fluctuations, and cannot effectively adapt to environments where high pressure and temperature cycles are circulating.
A corrugated joint structure is adopted. By leaving a gap between the concrete lining sections, an adaptively deformable joint structure is set up. The connectors move relatively when pressed internally to separate the lining sections, and then return to the original position after pressure relief to ensure structural integrity.
It effectively avoids cracking of the concrete lining section due to internal pressure, ensures that the structure remains stable under high pressure and temperature changes, improves sealing performance, and avoids gas leakage.
Smart Images
Figure CN223269991U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressed air energy storage, in particular to a corrugated joint structure of an air storage chamber lining, a lining structure and an air storage chamber. Background Art
[0002] Artificial gas storage chambers offer high safety, flexible site selection, excellent durability, and reasonable economic efficiency. Currently, most compressed air energy storage power station projects under construction and those under planning and filing utilize artificial gas storage chambers. Unlike artificial chambers such as natural gas storage reservoirs and hydropower transmission tunnels, compressed air energy storage power stations utilize a continuous cycle of gas filling and discharging within the chamber to store energy and regulate peak pressure, reaching a maximum of 10-15 MPa. Consequently, the temperature and pressure of the gas within the chamber are in a state of mutual influence and cyclical fluctuation. The lining and surrounding rock are subjected to the dual effects of cyclical gas pressure and temperature loads. Frequent pressure fluctuations can easily cause cracks in existing concrete lining structures, leading to damage. Utility Model Content
[0003] The purpose of the utility model is to overcome the technical problem in the prior art that the concrete lining structure of the gas storage chamber is prone to cracks and damage under pressure fluctuations, and to provide a corrugated joint structure of the gas storage chamber lining, a lining structure and a gas storage chamber.
[0004] In the first aspect, the utility model provides a corrugated joint structure of a gas storage chamber lining, comprising two connecting members arranged opposite to each other, the two connecting members being fixedly connected to two sections of lining respectively, the two connecting members being able to move relative to each other to approach or move away from each other when subjected to force, and both of the connecting members being formed with docking surfaces that can be engaged with each other, the docking surfaces comprising corrugated surfaces.
[0005] Compared with the existing concrete lining structure of the cavern, which is an integral structure and prone to cracking and damage when subjected to internal pressure, the present application can divide the concrete lining structure into sections and reserve gaps. A joint structure for adaptive deformation can be set at the gap to connect the joint structure with the segmented concrete lining section. When subjected to internal pressure, the two connecting pieces arranged opposite to each other in the joint structure can be squeezed to separate the concrete lining sections on both sides. After the internal pressure is released, the two connecting pieces can move toward each other to restore the deformed structure to its original state, and the concrete lining sections on both sides can also return to their initial positions. Therefore, when subjected to internal pressure, the lining deformation set can be restored. The deformation structure adapts to the pressure, avoiding the concrete lining section from being unable to withstand the internal pressure and cracking and being damaged; the butt joint surfaces formed on the two connectors that can be embedded with each other can ensure the stability of the two connectors during relative movement, and can accurately restore to their original positions, ensuring the integrity of the structure; here, the butt joint surfaces include corrugated surfaces that can be embedded with each other, and the butt joint structure of the connector can also be regarded as a comb tooth structure. When the two connectors are subjected to the internal pressure in the cavern, the force direction is the opposite pulling force and they are separated. When the internal pressure in the cavern is released, the two connectors can be pushed closer to each other by the opposite thrusts applied by the two concrete lining sections.
[0006] Preferably, a sealing member is provided at the opening of the gap between the two connecting members.
[0007] Preferably, the sealing member is connected to the two connecting members respectively through fasteners.
[0008] Preferably, a sliding groove is provided on the sealing member, the fastener passes through the sliding groove and is connected to the connecting member, and the fastener can move along the sliding groove relative to the sealing member along with the connecting member.
[0009] Preferably, an elastic member is provided between the two connecting members.
[0010] Preferably, the butting surface further includes a plane connected to the corrugated surface, and the elastic member is arranged between the planes on both sides.
[0011] Preferably, the abutting surface is coated with grease.
[0012] In a second aspect, the utility model provides a lining structure of a gas storage chamber, comprising a plurality of concrete lining sections and the corrugated joint structure of the gas storage chamber lining as described above, wherein the corrugated joint structure is arranged between adjacent concrete lining sections.
[0013] Preferably, steel bars are provided in the concrete lining section, and both ends of the steel bars are respectively connected to the connecting pieces.
[0014] In a third aspect, the utility model provides a gas storage chamber, comprising surrounding rock layers, the lining structure of the gas storage chamber as described above, and a sealing layer arranged in sequence from the outside to the inside.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The utility model provides a corrugated joint structure of a gas storage chamber lining, a lining structure and a gas storage chamber. The concrete lining structure can be divided into sections to reserve gaps, and a joint structure for adaptive deformation can be set at the gap. When subjected to internal pressure, the two connecting pieces arranged opposite to each other in the joint structure can be squeezed to separate the concrete lining sections on both sides. After the internal pressure is relieved, the two connecting pieces can move toward each other to restore the deformed structure to its original state, and the concrete lining sections on both sides can also return to their initial positions. Therefore, when subjected to internal pressure, the lining deformation can be concentrated in the deformed structure to release the pressure, thereby avoiding the concrete lining sections from being unable to withstand the internal pressure and cracking and being damaged; the butt joint surfaces formed on the two connecting pieces and capable of interlocking with each other can ensure the stability of the two connecting pieces during relative movement, and can accurately restore to their original positions, thereby ensuring the integrity of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the corrugated joint structure of the gas storage chamber lining of the utility model before deformation.
[0018] Figure 2 This is a schematic diagram of the deformed corrugated joint structure of the gas storage chamber lining of the present invention.
[0019] Figure 3 for Figure 1 A-direction schematic diagram in .
[0020] Figure 4 for Figure 2 Schematic diagram of direction B in .
[0021] Figure 5 It is a schematic diagram of the lining structure of the gas storage chamber of the present utility model.
[0022] Markings in the figure:
[0023] 1. Corrugated joint structure, 11. Connecting piece, 12. Butt joint surface, 121. Corrugated surface, 122. Flat surface, 13. Sealing piece, 131. Slide groove, 14. Fastener, 15. Elastic piece, 2. Concrete lining section. DETAILED DESCRIPTION
[0024] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.
[0025] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is placed when it is conventionally used. These terms of orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians, and do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, they should not be understood as limitations on the present invention.
[0026] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.
[0027] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.
[0028] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.
[0029] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified / defined / restricted, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communication connections; they may be direct connections, indirect connections through an intermediate medium, or internal connections between two components.
[0030] Example 1
[0031] This embodiment provides a corrugated joint structure for a gas storage chamber lining.
[0032] Figure 1 This is a schematic diagram of the corrugated joint structure of the gas storage chamber lining of the present invention before deformation; Figure 2 This is a schematic diagram of a deformed corrugated joint structure of a gas storage chamber lining according to the present invention; Figure 3 for Figure 1 A-direction schematic diagram in FIG; Figure 4 for Figure 2 Schematic diagram of direction B in the figure; Figure 5 It is a schematic diagram of the lining structure of the gas storage chamber of the present utility model.
[0033] like Figures 1 to 5 As shown in , the corrugated joint structure of the gas storage chamber lining described in this embodiment may include two connecting members 11 arranged opposite to each other. The two connecting members 11 can move relative to each other to move closer to or away from each other when subjected to force. For example, the two connecting members 11 can be installed at the segmented gap of the concrete lining of the gas storage chamber, so that the two connecting members 11 are respectively connected to the two concrete lining segments 2 on both sides. When the gas storage chamber is inflated, the concrete lining is expanded by the outward internal pressure, and the various concrete lining segments 2 are deformed and move away from each other, thereby separating the two connecting members 11 at the segmented gap.
[0034] Both connectors 11 are formed with mating surfaces 12 that can be interlocked. The mating surfaces 12 may include corrugated surfaces 121. The corrugated surfaces 121 on the two mating surfaces 12 can be interlocked, which can limit the relative movement direction of the two connectors 11, so that the two connectors 11 can only move toward each other or in the opposite direction, thereby preventing the two connectors 11 from being misaligned in the longitudinal direction (radial direction of the chamber). In addition, the mating surface 12 between the two connectors 11 can also serve as a sealing surface. Using the corrugated surface 121 as the mating surface 12 can extend the size of the sealing surface, improve the sealing performance, and prevent the gas in the chamber from leaking from between the two connectors 11 after the concrete lining section 2 is separated by internal pressure. Here, the mating surfaces 12 on the two connectors 12 can also be regarded as interlocking comb teeth structures.
[0035] Compared with the existing concrete lining structure of the cavern, which is an integral structure, the concrete lining is prone to cracking and damage when subjected to internal pressure. The present application can divide the concrete lining structure into sections and reserve gaps. A joint structure for adaptive deformation can be set at the gap. When subjected to internal pressure, the two connecting parts 11 relatively set in the joint structure can be squeezed to separate the concrete lining sections 2 on both sides. After the internal pressure is removed, the two connecting parts 11 can move toward each other to restore the deformed structure to its original state, and the concrete lining sections 2 on both sides can also return to their initial positions. Therefore, when subjected to internal pressure, the lining deformation can be concentrated in the deformed structure to adapt to the pressure, avoiding the concrete lining section 2 from being unable to withstand the internal pressure and cracking and damage; the docking surfaces 12 formed on the two connecting parts 11 that can be interlocked with each other can ensure the stability of the two connecting parts 11 during relative movement, and can accurately restore to their original position, thereby ensuring the integrity of the structure.
[0036] In this embodiment, a seal 13 is provided at the opening of the gap between the two connectors 11; providing the seal 13 at the opening of the gap between the two connectors 11 can further improve the sealing performance of the gap and prevent the gas in the chamber from leaking from the gap between the two connectors 11 along the butt joint 12. The seal 13 can be provided on the two connectors 11 in the direction of the outside of the concrete lining section 2 (i.e., along the radial outside of the chamber), or on the two connectors 11 in the direction of the inside of the concrete lining section 2 (i.e., along the radial inside of the chamber). If the sealing requirements permit, the seal 13 may not be provided, and the sealing may be performed solely by the corrugated surface structure (i.e., comb tooth structure) of the mating surfaces 12. Generally speaking, the distance between the two connectors 11 will not vary greatly, and the two butt joint surfaces 12 will not be completely separated, so a certain sealing performance can also be guaranteed.
[0037] Optionally, the seal 13 is connected to the two connectors 11 respectively through fasteners 14; here, the seal 13 can be a rigid seal 13, such as a steel plate, and a slide groove 131 of a certain length can be opened on the steel plate, and the fastener 14 can be passed through the slide groove 131 to connect with the connector 11. When the connector 11 moves, the fastener 14 can slide in the slide groove 131, so that relative movement between the steel plate and the connector 11 can be achieved, and the sealing of the gap by the steel plate is not affected during the movement; the fastener 14 can be a connecting component such as a bolt, a screw or a rivet, and the present invention does not make any specific restrictions on this.
[0038] In this embodiment, an elastic member 15 is provided between the two connectors 11. Specifically, the elastic member 15 can be a spring or a disc spring. The elastic member 15 can be connected between the two abutting surfaces 12 of the two connectors 11. When there is no internal pressure in the chamber, the elastic member 15 is compressed under the action of the surrounding rock pressure, and the abutting surfaces 12 on the two connectors 11 remain in contact. When the chamber is inflated to generate internal pressure, the internal pressure can overcome the elastic force of the elastic member 15 and push the two connectors 11 apart, causing the elastic member 15 to stretch. During the pressurization and decompression cycle, the elastic member 15 serves as a buffer and force transmission component between the two connectors 11.
[0039] Optionally, the docking surface 12 further includes a plane 122 connected to the corrugated surface 121, and the elastic member 15 is disposed between the planes 122 on both sides. Specifically, the docking surface 12 includes two sections of the corrugated surface 121 and three sections of the plane 122, wherein the corrugated surface 121 and the plane 122 are disposed crosswise, that is, one section of the plane 122 is disposed between the two sections of the corrugated surface 121, and the other two sections of the plane 122 are disposed on either side of the two sections of the corrugated surface 121. The planes 122 on the two connecting members 11 can also be interlocked with each other, and the ends of the elastic member 15 can be respectively connected to the planes 122 on the two connecting members 11. The number of elastic members 15 can correspond to the number of sections of the plane 122 on the connecting member 11, and can also be three; however, the present invention is not limited thereto. The number of sections of the plane 122 on the connecting member 11 and the corrugated surface 121 and the positional relationship between the two can be selected according to actual needs. The number and location of the elastic members 15 can also be selected according to actual needs, and the present invention does not impose specific limitations on this.
[0040] Optionally, the butting surfaces 12 of the connectors 11 may be coated with grease; the grease may reduce the sliding friction between the corrugated surfaces 121 of the two connectors 11, thereby making the relative movement between the two connectors 11 smoother.
[0041] Example 2
[0042] This embodiment provides a lining structure for a gas storage chamber.
[0043] The lining structure of the gas storage chamber described in this embodiment includes several concrete lining sections 2 and the corrugated joint structure of the gas storage chamber lining as described in Example 1. The corrugated joint structure 1 is arranged between adjacent concrete lining sections 2.
[0044] Concrete lining segment 2 serves as the foundation lining. Multiple segments of concrete lining segment 2 can be separated by several deformation-inducing joints. The specific lining thickness is calculated based on the surrounding rock conditions, operating internal pressure, and other operating conditions. The specific number of joints is determined based on the maximum compression of the surrounding rock and the increase in the chamber's circumference. In other words, the circumferential deformation of the concrete lining can be calculated based on the maximum internal pressure in the chamber. Combined with the deformable capacity of each corrugated joint structure 1, the number of concrete lining segments and the number of corrugated joint structures 1 can be determined.
[0045] When the adaptive deformation lining structure of the artificial gas storage chamber is in maintenance condition, Figure 1 As shown in , the pressure and temperature inside the chamber drop, the concrete lining structure is mainly subjected to the pressure of the surrounding rock and soil, and is in a compressed state. The corrugated joint structure 1 at the structural joint is compressed; when the adaptive deformation lining structure of the artificial gas storage chamber is in the operating condition, as shown in Figure 2 As shown in the figure, the upward arrow direction is the direction of pressure. Under the action of high internal pressure, the temperature inside the chamber increases, the concrete structure produces tensile stress, the two connectors 11 of the corrugated joint structure 1 at the joint are pulled apart, and concentrated deformation occurs at the corrugated joint structure 1 to disperse the tensile stress of the lining. At the same time, the sealing member 13 can always cover the opening of the gap between the two connectors 11 of the corrugated joint structure 1 to maintain the airtightness of the corrugated joint structure 1.
[0046] In this embodiment, concrete lining section 2 is provided with steel bars (not shown), each end of which is connected to connectors 11. The steel bars can be connected to connectors 11 by welding or integral molding, which stabilizes the overall structure of concrete lining section 2 and prevents movement or misalignment between connectors 11 and the concrete lining. Specifically, concrete lining section 2 utilizes C45 waterproof concrete.
[0047] It should be noted that the corrugated joint structure of the gas storage chamber lining described in this embodiment is consistent with the corrugated joint structure of the gas storage chamber lining described in Example 1, and this embodiment will not be further described in detail.
[0048] The lining structure of the gas storage chamber of the present invention may include a base lining portion (i.e., concrete lining segments 2) and deformation-inducing joints (i.e., gaps between concrete lining segments 2). The base lining portion is constructed of high-strength concrete, forming the basic skeleton of the chamber. Deformation-inducing joints are evenly distributed throughout the secondary lining structure, dividing the lining structure into several independent but interconnected units. The corrugated joint structure 1 at each joint may consist of two connectors 11 and a seal 13. These components can slide and deform when the chamber deforms, absorbing and dissipating stress. The connectors 11 may be connected to the concrete lining via steel bars.
[0049] The utility model can calculate the maximum compression of the surrounding rock and the increase in the chamber circumference under the action of the chamber pressure according to different surrounding rock conditions, and combine the deformation of a single corrugated joint structure 1 to calculate and determine the number of corrugated joint structures 1, that is, the number of segments of the concrete lining, so that the lining structure can meet the expansion and deformation requirements of the chamber.
[0050] Example 3
[0051] This embodiment provides a gas storage chamber.
[0052] The gas storage chamber described in this embodiment may include surrounding rock layers (not shown in the figure) arranged in sequence from the outside to the inside, a lining structure of the gas storage chamber as described in Example 2, and a sealing layer (not shown in the figure).
[0053] After the excavation of the cavern, the initial support is carried out by spraying concrete. Before tying the secondary lining steel bars, the joint positions are marked, and the prefabricated corrugated joint structure 1 is installed at the marked positions. The corrugated joint structure 1 divides the secondary lining structure into several blocks, and the secondary lining steel bars are tied in blocks, and the secondary lining main bars are welded to the connectors 11. After the joint construction is completed, a special template trolley is used to cast each concrete lining, and the connector 11 serves as the annular end template for pouring the lining concrete. After the secondary lining concrete is cured to the designed strength, a seal 13 is installed between each joint connector 11. The seal 13 is installed on the inside and outside of the concrete lining so that it fits tightly with the connector 11 to form the entire corrugated joint structure 1. The seal 13 can still maintain a close fit with the connector 11 under the inflation and deflation conditions during the operation and maintenance of the cavern, and can serve as a second airtight insurance outside the corrugated surface 121 to effectively prevent compressed gas leakage.
[0054] In summary, the corrugated joint structure, lining structure and gas storage chamber of the gas storage chamber lining of the present invention can divide the concrete lining structure into sections and reserve gaps. A joint structure for adaptive deformation can be set at the gap. When subjected to internal pressure, the two connecting parts relatively set in the joint structure can be squeezed to separate the concrete lining sections on both sides. After the internal pressure is removed, the two connecting parts can move toward each other to restore the deformed structure to its original state, and the concrete lining sections on both sides can also return to their initial positions. Therefore, when subjected to internal pressure, the lining deformation can be concentrated in the deformed structure to adapt to the pressure, avoiding the concrete lining section from being unable to withstand the internal pressure and cracking and damage; the docking surfaces formed on the two connecting parts that can be interlocked with each other can ensure the stability of the two connecting parts during relative movement, and can accurately restore to their original position, thereby ensuring the integrity of the structure.
[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A corrugated joint structure for gas storage chamber lining, characterized in that: The invention comprises two connecting members (11) arranged opposite to each other, wherein the two connecting members (11) are respectively fixedly connected to two sections of lining, and the two connecting members (11) can move relative to each other to move closer to or farther away from each other when subjected to force, and the two connecting members (11) are both formed with butt joint surfaces (12) that can be engaged with each other, and the butt joint surfaces (12) include corrugated surfaces (121).
2. The corrugated joint structure of the gas storage chamber lining according to claim 1 is characterized in that: A sealing member (13) is provided at the opening of the gap between the two connecting members (11).
3. The corrugated joint structure of the gas storage chamber lining according to claim 2 is characterized in that: The sealing member (13) is respectively connected to the two connecting members (11) via fasteners (14).
4. The corrugated joint structure of the gas storage chamber lining according to claim 3 is characterized in that: The sealing member (13) is provided with a sliding groove (131), the fastener (14) passes through the sliding groove (131) and is connected to the connecting member (11), and the fastener (14) can move relative to the sealing member (13) along the sliding groove (131) along with the connecting member (11).
5. The corrugated joint structure of the gas storage chamber lining according to claim 1 is characterized in that: An elastic member (15) is provided between the two connecting members (11).
6. The corrugated joint structure of the gas storage chamber lining according to claim 5, characterized in that: The docking surface (12) further includes a plane (122) connected to the corrugated surface (121), and the elastic member (15) is arranged between the planes (122) on both sides.
7. The corrugated joint structure of the gas storage chamber lining according to any one of claims 1 to 6, characterized in that: The butt joint surface (12) is coated with lubricating grease.
8. A lining structure for a gas storage chamber, characterized in that: A gas storage chamber lining comprising a plurality of concrete lining sections (2) and a corrugated joint structure according to any one of claims 1 to 7, wherein the corrugated joint structure is arranged between adjacent concrete lining sections (2).
9. The lining structure of the gas storage chamber according to claim 8, characterized in that: Steel bars are provided in the concrete lining section (2), and both ends of the steel bars are respectively connected to the connecting pieces (11).
10. A gas storage chamber, characterized in that: It comprises a surrounding rock layer, a lining structure of the gas storage chamber according to claim 8 or 9, and a sealing layer arranged in sequence from the outside to the inside.