Gas storage structure and hydrogen storage well

Abstract

The invention discloses a gas storage structure and a hydrogen storage well, and relates to the technical field of hydrogen storage wells, the gas storage structure comprises a stress outer layer, an airtight inner layer and a supporting assembly, and a containing cavity is formed in the stress outer layer; the airtight inner layer is located in the containing cavity, and a gas storage cavity used for storing gas is formed in the airtight inner layer; the supporting assembly is located between the stress outer layer and the airtight inner layer and comprises a connecting piece and a sliding supporting piece, the connecting piece is arranged on the airtight inner layer, and the sliding supporting piece is arranged on the connecting piece in a sliding mode and can abut against or be separated from the inner wall of the stress outer layer during sliding. According to the gas storage structure provided by the invention, the supporting assembly comprising the connecting piece and the sliding supporting piece is arranged between the stressed outer layer and the airtight inner layer, and the sliding supporting piece can flexibly abut against or be separated from the inner wall of the stressed outer layer in a sliding mode, so that the airtight inner layer can be conveniently detached and replaced when needed; and the maintenance difficulty and cost are greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen storage wells, and particularly relates to a gas storage structure and a hydrogen storage well. BACKGROUND

[0002] With the wide application of clean energy such as hydrogen energy and natural gas, the safety, reliability and maintainability of underground gas storage wells as important energy storage facilities have become key technical challenges. Underground gas storage wells usually need to operate for a long time under high pressure environment, while bearing the pressure of external rock mass and the pressure of internal gas. In order to ensure the stability and gas tightness of the gas storage well, a multi-layer structure design is usually adopted in the prior art, including a high-strength stress layer of an outer layer and a gas tight layer of an inner layer.

[0003] Although the existing multi-layer structure gas storage well improves the performance of the gas storage well to a certain extent, there are still problems, for example, the stress layer and the gas tight layer structure of the traditional gas storage well are mostly connected in a fixed manner, once the gas tight layer is damaged or needs to be replaced, the maintenance work will become extremely complex and costly, which seriously affects the service life of the gas storage well. SUMMARY

[0004] The purpose of the present application is to overcome the above technical deficiencies, and to provide a gas storage structure and a hydrogen storage well, which solve the technical problem that in the prior art, the stress layer and the gas tight layer structure of the gas storage well are mostly connected in a fixed manner, once the gas tight layer is damaged or needs to be replaced, the maintenance work will become extremely complex and costly, which seriously affects the service life of the gas storage well.

[0005] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0006] In a first aspect, the present application provides a gas storage structure, comprising: a stress outer layer, which is internally provided with a receiving cavity; a gas tight inner layer, which is located in the receiving cavity, and is internally provided with a gas storage cavity for storing gas; and a support assembly, which is located between the stress outer layer and the gas tight inner layer, and comprises a connecting piece and a sliding support piece, the connecting piece is arranged in the gas tight inner layer, and the sliding support piece is slidingly arranged in the connecting piece and can abut or be separated from the inner wall of the stress outer layer when sliding.

[0007] In some embodiments, the connecting piece comprises an inner magnetic ring and an outer magnetic ring, the inner magnetic ring is arranged on the outer surface of the gas tight inner layer, the outer magnetic ring is slidingly connected with the sliding support piece, and the inner magnetic ring and the outer magnetic ring are magnetically connected.

[0008] In some embodiments, the outer magnetic ring has a through first wire hole, and the inner magnetic ring has a through second wire hole. The first wire hole and the second wire hole are staggered and both connect to the accommodating cavity and the gas storage cavity.

[0009] In some embodiments, the support assembly further includes a motor, one side of the sliding support has a retaining tooth, the motor is fixed to the connector, the output shaft of the motor meshes with the retaining tooth, and the motor can drive its output shaft to rotate during operation, so as to drive the sliding support to reciprocate through the engagement of the output shaft.

[0010] In some embodiments, the support assembly further includes a rotary locking mechanism, which includes a locking member, a return spring, and a cylinder. The locking member is rotatably disposed on the connector and can switch between a locked position and an unlocked position. The return spring is connected to the locking member, and the cylinder is disposed on the connector and rotatably connected to the locking member.

[0011] In some embodiments, the support assembly further includes a pressure block, one side of which is connected to the sliding support member, and the other side of which is arc-shaped with the curvature consistent with the inner wall curvature of the force-bearing outer layer.

[0012] In some embodiments, the gas storage structure further includes a polymer sealing layer that fills the interlayer between the stress-bearing outer layer and the airtight inner layer.

[0013] In some embodiments, the polymer sealing layer comprises an integrally cast sealing layer composed of a first component material and a second component material, wherein the first component material is an acrylate or epoxy silicone rubber material; and the second component material is a curing accelerator or a toughening polymer resin.

[0014] In some embodiments, the gas storage structure further includes a sealing cover, which is located at the top opening between the stress-bearing outer layer and the airtight inner layer, and the sealing cover has bolt holes, grouting holes and monitoring holes.

[0015] Secondly, the present invention also provides a hydrogen storage well, including a concrete base and the aforementioned gas storage structure, wherein a placement groove is formed inside the concrete base, the gas storage structure is located in the placement groove, and the outer wall of the load-bearing outer layer is connected to the inner wall of the placement groove.

[0016] Compared with existing technologies, the gas storage structure provided by this invention, by setting a support assembly including connectors and sliding supports between the stressed outer layer and the airtight inner layer, allows the sliding supports to flexibly abut or detach from the inner wall of the stressed outer layer through sliding, making it easy to disassemble and replace the airtight inner layer when needed, greatly reducing maintenance difficulty and cost. At the same time, this adjustable support method enhances the structural stability of the gas storage well under high-pressure environments, prevents inner layer slippage or displacement, and further improves the airtightness of the gas storage well. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a hydrogen storage well provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection between the support component and the airtight inner layer provided in an embodiment of the present invention; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the diagram; Figure 4 This is a schematic diagram of the rotary locking mechanism provided in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] To address the technical problem that existing technologies often employ fixed connections between the load-bearing layer and the gas-tight layer of gas storage wells, making maintenance extremely complex and costly once the gas-tight layer is damaged or needs replacement, thus severely impacting the service life of the gas storage well, this invention provides a gas storage structure that allows for easy disassembly and replacement of the gas-tight inner layer when needed, significantly reducing maintenance difficulty and cost.

[0020] It should be noted that the gas storage structure described in this invention is used in, but not limited to, hydrogen storage wells. For ease of explanation, this invention will only use the application of the gas storage structure in hydrogen storage wells as an example. The principle of the gas storage structure applied to other types of equipment is essentially the same as that applied to hydrogen storage wells, and will not be described in detail here.

[0021] Please see Figure 1 , Figure 1This is a schematic diagram of a hydrogen storage well in one embodiment of the present invention. The hydrogen storage well includes a gas storage structure comprising a load-bearing outer layer 1, an airtight inner layer 2, and a support assembly 3. The load-bearing outer layer 1 has a receiving cavity 11 for accommodating the airtight inner layer 2. The airtight inner layer 2 is located within the receiving cavity 11 and has a gas storage chamber 21 for storing gas (e.g., hydrogen). The support assembly 3 is located between the load-bearing outer layer 1 and the airtight inner layer 2. The support assembly 3 includes a connector 31 and a sliding support 32. The connector 31 is fixed to the airtight inner layer 2, and the sliding support 32 is slidably disposed on the connector 31. During sliding, the support 32 can abut against or detach from the inner wall of the load-bearing outer layer 1. This allows for rapid disassembly of the airtight inner layer 2 when it needs replacement or maintenance, significantly improving maintenance efficiency.

[0022] In one embodiment, please refer to Figure 2 and Figure 3 The connector 31 includes an inner magnetic ring 311 and an outer magnetic ring 312. The inner magnetic ring 311 is disposed on the airtight inner layer 2, and the outer magnetic ring 312 is slidably connected to the sliding support 32. The inner magnetic ring 311 and the outer magnetic ring 312 are connected by magnetic attraction. In this embodiment, both the inner magnetic ring 311 and the outer magnetic ring 312 are annular. The inner magnetic ring 311 is bonded to the inner wall of the airtight inner layer 2 with strong adhesive. The outer magnetic ring 312 is magnetically connected to the inner magnetic ring 311, and the contact area between the two is large, so a stable connection can be maintained. The sliding support 32 is slidably disposed on the outer magnetic ring 312. The outer magnetic ring 312 can provide support for the sliding support 32 and a sliding platform, so that the sliding support 32 can slide back and forth smoothly.

[0023] The number of sliding support members 32 can be set to multiple. Multiple sliding support members 32 are arranged around the periphery of the outer magnetic ring 312 so that multiple sliding support members 32 can abut and limit multiple parts of the inner wall of the outer force-bearing layer 1 along the circumference, so that the gap between the outer force-bearing layer 1 and the airtight inner layer 2 can be maintained in the circumferential direction.

[0024] In one embodiment, please refer to Figure 3The outer magnetic ring 34 has a through-hole 341, and the inner magnetic ring 33 has a through-hole 331. The first through-hole 341 and the second through-hole 331 are staggered and both connect to the accommodating cavity 11 and the gas storage cavity 21. In this embodiment, the outer magnetic ring 34 and the inner magnetic ring 33 have through-holes 341 and 331, respectively. These two through-holes are staggered, meaning they are not on the same axis, but both connect to the accommodating cavity 11 of the outer layer 1 and the gas storage cavity 21 of the airtight inner layer 2. This allows for the installation of wiring or monitoring pipes from the outside to the inside of the gas storage cavity 21 without affecting airtightness and structural integrity. For example, sensor wiring or pressure monitoring pipes can enter the gas storage cavity 21 through these two staggered through-holes, thereby enabling real-time monitoring of the gas state inside the gas storage cavity 21, while avoiding the risk of gas leakage that may be caused by wiring layout, ensuring the safety of the gas storage structure.

[0025] In one embodiment, please refer to Figure 3 The support assembly 3 also includes a motor 35. One side of the sliding support 32 has a retaining tooth 36. The motor 35 is fixed to the connector 31, and the output shaft of the motor 35 meshes with the retaining tooth 36. When the motor 35 is working, its output shaft rotates, driving the sliding support 32 to reciprocate through this meshing. Through the automated control of the motor 35, the sliding operation of the sliding support 32 is more efficient, further enhancing the intelligence of the gas storage structure.

[0026] Further, please refer to Figure 4The support assembly 3 also includes a rotary locking mechanism 37, which includes a locking element 371, a return spring 372, an electromagnetic switch 373, a first electromagnetic element 374, and a second electromagnetic element 375. The locking element 371 is rotatably mounted on the connecting member 31 and can switch between a locked position and an unlocked position. The return spring 372 connects the locking element 371 and the connecting member 31. The electromagnetic switch 373 is located on the connecting member 31 and connected to the first electromagnetic element 374, and the second electromagnetic element 375 is located on the locking element 371. When the electromagnetic switch 373 is not energized, the first electromagnetic component 374 and the second electromagnetic component 375 do not generate any force. At this time, the return spring 372 presses against the locking component 371 with elastic force, so that the locking component 371 is in the locked position and engages with the locking tooth 36 of the sliding support component 32. At this time, the motor can drive the sliding support component 32 to slide towards the outer force layer 1, so that the sliding support component 32 acts on the outer force layer 1. Since the locking component 371 has a reverse limiting effect on the locking tooth 36, the sliding support component 32 cannot move away from the outer force layer 1 at this time. In this way, the sliding support component 32 can be stably driven to act on the outer force layer 1. When the electromagnetic switch 373 is energized, the first electromagnetic component 374 and the second electromagnetic component 375 generate a magnetic attraction to drive the locking component 371 to rotate and switch to the unlocked position to disengage from the locking tooth 36. At this time, the motor can drive the locking tooth 36 to move away from the outer force layer 1 to disengage from the outer force layer 1. At this time, there is no force between the outer force layer 1 and the airtight inner layer 2, which makes it easy to replace the airtight inner layer 2.

[0027] Further, please refer to Figure 3 The support component 3 also includes a pressure block 38. One side of the pressure block 38 is connected to the sliding support member 32, and the other side of the pressure block 38 is arc-shaped, with the arc consistent with the arc of the inner wall of the outer layer 1. In this embodiment, by setting the pressure block 38, when the sliding support member 32 slides toward the outer layer 1, the pressure block 38 can be driven to tightly fit against the inner wall of the outer layer 1, further enhancing the support stability between the airtight inner layer 2 and the outer layer 1, while reducing frictional damage during the sliding process.

[0028] In one embodiment, please refer to Figure 1 The gas storage structure also includes a polymer sealing layer 4, which fills the interlayer between the load-bearing outer layer 1 and the airtight inner layer 2, further enhancing the airtightness and pressure resistance of the gas storage structure. In this embodiment, the polymer sealing layer 4 is an integrally cast sealing layer composed of a first component material and a second component material. The first component material is an acrylate or epoxy silicone rubber material with high elasticity and pressure resistance, while the second component material is a curing accelerator or toughening polymer resin. The polymer sealing layer 4 formed by mixing these two components not only has good elasticity, adapting to the deformation requirements of the gas storage well under high pressure, but also has excellent pressure resistance, ensuring the safety of gas storage.

[0029] In one embodiment, please refer to Figure 1 The gas storage structure also includes a sealing cover 5, which is located at the top opening between the stress-bearing outer layer 1 and the airtight inner layer 2. The sealing cover 5 has bolt holes 51, grouting holes 52, and monitoring holes 53. In this embodiment, by providing the sealing cover 5, not only is the top sealing of the gas storage structure ensured, but the grouting holes 52 allow for on-site casting of the polymer sealing layer 4, and the monitoring holes 53 allow monitoring devices to be inserted into the gas storage chamber 21 for real-time monitoring of the gas state within the chamber, further enhancing the safety of the gas storage structure.

[0030] In one embodiment, the aforementioned outer stress-bearing layer 1 is made of 316L stainless steel to improve structural stability. The airtight inner layer 2 includes an inner liner and a composite reinforcing layer. The inner liner is a high-strength alloy material resistant to hydrogen embrittlement and is used to directly contact the stored gas. The outer wall of the airtight inner layer 2 is provided with multiple inner magnetic rings 311 along its height direction. Each inner magnetic ring 311 is attracted to a corresponding outer magnetic ring 312 and a corresponding support component 3 is installed. The multiple support components 3 act on multiple parts of the outer stress-bearing layer 1 to further improve the stability of the stress between the outer stress-bearing layer 1 and the airtight inner layer 2.

[0031] Secondly, please refer to Figure 1 The present invention also provides a hydrogen storage well, including a concrete base layer 6 and the aforementioned gas storage structure. A mounting groove (not shown in the figure) is formed inside the concrete base layer 6, and the gas storage structure is located within the mounting groove. The outer wall of the load-bearing outer layer 1 is connected to the inner wall of the mounting groove. This embodiment, by setting the concrete base layer 6, enables the gas storage structure to be stably installed. Simultaneously, the high strength and stability of the concrete base layer 6 provide reliable external support for gas storage, ensuring the safety of the hydrogen storage well during long-term operation.

[0032] To better understand this invention, the following is combined with... Figures 1 to 4 The technical solution of the present invention will be described in detail below: This invention discloses a gas storage structure and a hydrogen storage well, aiming to solve the problems of complex maintenance and high cost caused by the fixed connection between the load-bearing layer and the gas-tight layer in traditional gas storage wells. The gas storage structure provided by this invention includes a load-bearing outer layer 1, a gas-tight inner layer 2, and a support assembly 3. The load-bearing outer layer 1 has a receiving cavity 11, and the gas-tight inner layer 2 is located in the receiving cavity 11. The interior of the gas-tight inner layer 2 has a gas storage chamber 21 for storing gas (e.g., hydrogen). The support assembly 3 is located between the load-bearing outer layer 1 and the gas-tight inner layer 2. The support assembly 3 includes a connector 31 and a sliding support 32. By flexibly abutting or disengaging from the inner wall of the load-bearing outer layer 1, the gas-tight inner layer 2 can be easily disassembled and replaced.

[0033] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas storage structure, characterized in that, include: The outer layer is subjected to stress, and an internal cavity is provided. An airtight inner layer is located in the accommodating cavity, and a gas storage cavity for storing gas is provided inside the airtight inner layer; and A support assembly is located between the stress-bearing outer layer and the airtight inner layer. The support assembly includes a connector and a sliding support. The connector is disposed on the outer surface of the airtight inner layer. The sliding support is slidably connected to the connector in a direction perpendicular to the outer surface of the airtight inner layer and can abut against or detach from the inner wall of the stress-bearing outer layer when sliding.

2. The gas storage structure according to claim 1, characterized in that, The connector includes an inner magnetic ring and an outer magnetic ring. The inner magnetic ring is disposed on the outer surface of the airtight inner layer. The outer magnetic ring is slidably connected to a sliding support. The inner magnetic ring and the outer magnetic ring are magnetically connected.

3. The gas storage structure according to claim 1, characterized in that, The outer magnetic ring has a through first wire hole, and the inner magnetic ring has a through second wire hole. The first wire hole and the second wire hole are staggered and both connect to the accommodating cavity and the gas storage cavity.

4. The gas storage structure according to claim 1, characterized in that, The support assembly also includes a motor. One side of the sliding support has a locking tooth. The motor is fixed to the connector. The output shaft of the motor meshes with the locking tooth. When the motor is working, it can drive its output shaft to rotate, so as to drive the sliding support to reciprocate through the meshing of the output shaft.

5. The gas storage structure according to claim 4, characterized in that, The support assembly further includes a rotary locking mechanism, which includes a locking member, a return spring, and a cylinder. The locking member is rotatably mounted on the connecting member and can switch between a locked position and an unlocked position. The return spring is connected to the locking member, and the cylinder is mounted on the connecting member and rotatably connected to the locking member.

6. The gas storage structure according to claim 1, characterized in that, The support assembly also includes a pressure block, one side of which is connected to the sliding support member, and the other side of which is arc-shaped with the curvature consistent with the inner wall curvature of the outer force-bearing layer.

7. The gas storage structure according to claim 1, characterized in that, The gas storage structure also includes a polymer sealing layer, which fills the interlayer between the stress-bearing outer layer and the airtight inner layer.

8. The gas storage structure according to claim 7, characterized in that, The polymer sealing layer comprises an integral cast sealing layer composed of a first component material and a second component material. The first component material is an acrylate or epoxy silicone rubber material; the second component material is a curing accelerator or a toughening polymer resin.

9. The gas storage structure according to claim 1, characterized in that, The gas storage structure also includes a sealing cover, which is located at the top opening between the stress-bearing outer layer and the airtight inner layer. The sealing cover has bolt holes, grouting holes and monitoring holes.

10. A hydrogen storage well, characterized in that, The system includes a concrete base layer and a gas storage structure as described in any one of claims 1-9, wherein a placement groove is formed inside the concrete base layer, the gas storage structure is located in the placement groove, and the outer wall of the load-bearing outer layer is connected to the inner wall of the placement groove.

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