A flexible sealing layer structure and installation process for a high-pressure gas storage chamber

Abstract

The present invention relates to the technical field of compressed air energy storage, and discloses a flexible sealing layer structure and installation process for a high-pressure gas storage chamber, including a chamber lining layer and a flexible sealing layer. The flexible sealing layer is laid on the inner wall of the chamber lining layer. The flexible sealing layer includes a strip connecting piece and a metal strip. The strip connecting piece and the metal strip are alternately covered on the flexible sealing layer and pressed tightly against the inner wall of the chamber lining layer. Embedded bolt sleeves and lining connecting bolts threadedly connected thereto are embedded in the chamber lining layer. By pre-embedding bolt sleeves in the chamber lining layer, the flexible sealing layer is installed, fitted and fixed on the inner wall of the chamber lining layer by using the lining connecting bolts and the strip connecting pieces, and the bolt holes on the flexible sealing layer are also sealed, so that the flexible sealing layer is safely and stably installed on the inner surface of the chamber lining layer, and then a high-pressure gas storage chamber system with sealed protection is constructed.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and particularly to a flexible sealing layer structure and installation process for a high-pressure gas storage chamber. Background Art

[0002] Compressed air energy storage technology is a large-capacity long-duration physical energy storage technology that is vigorously developed and promoted in China. It has the characteristics of large capacity and long-duration storage, can greatly improve the spatio-temporal structure of power generation and power consumption in the power grid, enhance the peak shaving capacity of the power grid, and solve the intermittency problem of renewable energy. There are a large number of compressed air energy storage projects under construction and proposed across the country. Since the investment in ground storage tanks is high and the number of available salt caverns is small, using artificial chambers, etc. as high-pressure air storage containers has become the most commonly used solution in the compressed air energy storage system projects under construction and proposed. Currently, the air sealing layer in artificial chambers mainly uses steel linings. However, when forming a sealing layer with high-strength steel linings in the chamber, the welding and assembly of steel linings in the cave are difficult, the installation steps are complex, the project cycle is long, and the price of steel lining materials is high. Therefore, many institutions have begun to study the use of other materials such as flexible polymer materials as sealing layer materials. Among them, it has been proposed to process the polymer sealing layer into an integral airbag as the sealing layer in the chamber. However, the integral airbag-type sealing layer has disadvantages such as troublesome transportation, high requirements for the chamber space, and difficulty in installation.

[0003] The existing connection methods between the flexible sealing layer and the chamber lining structure mainly include direct bonding and mechanical connection. Bonding is to bond the flexible sealing layer to the inner wall of the lining through a specific adhesive. However, the adhesion and durability of the adhesive are poor, and it cannot meet the effectiveness of bonding during the long operation period in the complex environment of the high-pressure gas storage chamber. Mechanical connection is to embed and install the flexible sealing layer in the lining or suspend the flexible sealing layer on the inner wall of the lining. However, it is difficult to implement the structure for embedding or suspending on the lining, and there are also leakage problems between the flexible sealing layer and the lining. At the same time, the huge internal air pressure of compressed air is likely to damage the lining structure and the flexible sealing layer structure.

[0004] Therefore, providing a flexible sealing layer that can be installed on the chamber lining with durability, stability, and safety is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a flexible sealing layer installed on the lining of a high-pressure gas storage chamber with durability, stability, and safety, for the advantage of sealing and storing compressed air. The present invention provides the following technical solutions:

[0006] A high-pressure gas storage chamber flexible sealing layer structure includes a chamber lining layer and a flexible sealing layer. The flexible sealing layer is laid on the inner wall of the chamber lining layer. The flexible sealing layer includes a bead connector and a metal bead. The bead connector and the metal bead are staggered and covered on the flexible sealing layer and pressed against the inner wall of the chamber lining layer. The chamber lining layer is embedded with embedded bolt sleeves and lining connecting bolts threadedly connected thereto. The flexible sealing layer and the bead connector are fixed to the chamber lining layer by the lining connecting bolts and the embedded bolt sleeves. The staggered ends of the bead connector and the metal bead are detachably connected by bolts and nuts. As a preferred technical solution of the present invention, a conventional bolt hole is provided in the middle of the beading connector. The lining connection bolt is screwed into the flexible sealing layer through the conventional bolt hole and the beading connector and fixed to the inner wall of the chamber lining layer. The beading connectors are respectively divided into beading connector type A, beading connector type B and beading connector type C. The beading connector type A is straight plate-shaped when viewed from the front, and has a bow-shaped cross section; the beading connector type B is L-shaped with a 90-degree angle when viewed from the front, and has a Z-shaped cross section; the beading connector type C is T-shaped with a 90-degree angle when viewed from the front, and has a bow-shaped cross section, and the adjacent side cross section is Z-shaped. Bolt holes corresponding to the lining connection bolts are provided on the surface of the flexible sealing layer. Air leakage paths are formed between the flexible sealing layer and the embedded bolt sleeve, the lining connection bolt and the beading connector respectively. A contact surface is formed between the flexible sealing layer and the embedded bolt sleeve and the bolt hole, and the contact surface is filled with elastic sealant.

[0007] By adopting the above technical solution, bolt sleeves are embedded in the chamber lining layer, and the flexible sealing layer is installed and fixed to the inner wall of the chamber lining layer using lining connecting bolts and pressure strip connectors.

[0008] While adopting the above-mentioned technical solutions, the present invention can also adopt or combine the following technical solutions: the metal strip is in the shape of a straight plate when viewed from the front, and has an arch-shaped cross-section; strip bolt holes are provided at both ends of the metal strip and the end of the strip connector, and the metal strip is detachably connected to the strip connector through bolts, nuts and strip bolt holes.

[0009] As a preferred technical solution of the present invention, the staggered ends of the bead connector, the metal bead and the bolts and nuts do not contact the surface of the flexible sealing layer.

[0010] As a preferred technical solution of the present invention, the cross section of the flexible sealing layer is ring-shaped, the head and tail ends of two adjacent flexible sealing layers are relatively overlapped, and the overlapping parts of the flexible sealing layers are bonded by an adhesive layer.

[0011] By adopting the above technical solution, each flexible sealing layer is installed with the chamber lining layer to ensure that the flexible sealing layer is safely and firmly installed on the inner surface of the chamber lining layer, thereby constructing a sealed and protected high-pressure gas storage chamber system.

[0012] A flexible sealing layer installation process for a high-pressure gas storage chamber is as follows:

[0013] S1: Based on the inner wall contour and inner diameter of the chamber, the self-weight loads of the flexible sealing layer, metal pressing strips, and pressing strip connectors, and combined with computational analysis or experimental simulation, determine the installation positions and spacings of the lining connection bolts, as well as the cross-sectional dimensions and lengths of the metal pressing strips.

[0014] S2: According to the installation positions and spacings of the lining connection bolts, embed corresponding embedded bolt sleeves during the construction of the chamber lining layer; precise control of the positions and angles of the embedded bolt sleeves should be ensured. The embedded bolt sleeves are in a form with one end closed, and the lining connection bolts are matched with the open ends of the embedded bolt sleeves.

[0015] S3: According to the connection directions and quantities of the metal pressing strips, select different types of pressing strip connectors. The pressing strip connectors and the metal pressing strips are connected by bolts and nuts. The bolt holes on the metal pressing strips are processed as long holes to be suitable for butt joint installation with their corresponding pressing strip connectors.

[0016] S4: After the construction of the chamber lining layer is completed, level the inner wall of the lining structure before installing the flexible sealing layer, and strip off the floating slurry and impurities around the embedded bolt sleeves to ensure that the outer end faces of the embedded bolt sleeves are flush with the inner wall of the chamber lining layer.

[0017] S5: When laying the flexible sealing layer, use a punching device on-site to punch bolt holes on the flexible sealing layer, ensuring that the bolt holes are aligned with the positions of the embedded bolt sleeves.

[0018] S6: Pass the lining connection bolts through the pressing strip connectors and the flexible sealing layer and then screw them into the embedded bolt sleeves, thereby pressing and fixing the flexible sealing layer on the inner wall of the chamber lining layer. Install detachable connecting metal pressing strips between adjacent two pressing strip connectors.

[0019] S7: The metal pressing strips can be arranged in two directions, axial and circumferential, of the chamber. The pressing strip connectors and the metal pressing strips are connected by bolts and nuts. Different types of pressing strip connectors can be selected according to the metal pressing strips with different connection directions and quantities.

[0020] S8: Through the above installation process and installation fittings, assemble the flexible sealing layer into a complete sealed cavity on the inner wall of the chamber lining layer.

[0021] A method for preventing leakage in a flexible sealing layer installation process for a high-pressure gas storage chamber is as follows:

[0022] S1: During the laying process of the flexible sealing layer, complete the punching of the embedded bolt sleeves and corresponding bolt holes on the inner wall of the flexible sealing layer. The punched bolt holes should be slightly smaller than the screw diameter of the lining connection bolts.

[0023] S2: Apply elastic sealant to the contact surface range between the flexible sealing layer and the embedded bolt sleeve, ensuring that the elastic sealant is applied continuously and completely. After the application is completed, attach the flexible sealing layer to the inner wall of the chamber lining.

[0024] S3: Install the lining connecting bolts. Before installing the lining connecting bolts, apply elastic sealant to the inner circumferential surface of the bolt holes in the flexible sealing layer, ensuring that the elastic sealant is applied continuously, completely, and fully. Then screw in the lining connecting bolts, and the screw of the lining connecting bolts and the inner circumferential surface of the bolt holes in the flexible sealing layer are filled with elastic sealant.

[0025] S4: When splicing and installing the head and tail of the flexible sealing layer, apply a glue layer with a certain width to the outer wall of the head and tail ends of the flexible sealing layer along the direction of the annular splicing seam, and bond the head and tail splicing ends of the flexible sealing layer together.

[0026] By adopting the above technical solutions, for the air leakage paths that appear in the range of the lining connecting bolts and bolt holes on the flexible sealing layer, use elastic sealant and glue layer to block the air leakage paths. When the chamber is filled with compressed air, the flexible sealing layer is subjected to the action of the internal pressure of the compressed air in the radial direction of the chamber, and it will "expand" in both the axial and circumferential directions of the chamber due to the pressure in the radial direction of the chamber. Under the expansion effect, the flexible sealing layer and the lining connecting bolts will be closer, and the existing gaps will be compressed and filled completely, making the flexible sealing layer, elastic sealant, and lining connecting bolts fit more closely, blocking the air leakage path and ensuring no leakage occurs at this node. At the same time, under the expansion effect, the flexible sealing layer and the embedded bolt sleeve of the chamber lining layer are also closer, and the gaps that have been filled with sealant will be compressed to complete densification, making the flexible sealing layer, elastic sealant, and chamber lining layer fit more closely, blocking the air leakage path.

[0027] An installation frame in the installation process of the flexible sealing layer for a high-pressure gas storage chamber. The installation frame is used to lay the flexible sealing layer on the inner wall of the chamber lining. The bottom of the installation frame is equipped with balance support feet, and the bottom of the balance support feet is equipped with electric drive wheel devices. The outside of the installation frame is provided with circumferentially arranged telescopic support feet, and the flexible sealing layer is laid on the surface of the telescopic support feet.

[0028] By adopting the above technical solutions, with the assistance of the installation frame, it is convenient to transport each flexible sealing layer into the chamber. Use the telescopic support feet to place the flexible sealing layer on the surface of the telescopic support feet, and then lay the flexible sealing layer on the inner wall of the chamber lining, improving the transportation and installation efficiency of the flexible sealing layer.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The installation process of the flexible sealing layer for the high-pressure gas storage chamber of the present invention is to pre-embed bolt sleeves on the lining layer of the chamber, and use the lining connecting bolts and strip connectors to install and fix the flexible sealing layer on the inner wall of the lining layer of the chamber. Measures are also taken to seal the bolt holes on the flexible sealing layer. By installing each piece of the flexible sealing layer with the lining layer of the chamber, it is ensured that the flexible sealing layer is safely and firmly installed on the inner surface of the lining layer of the chamber, thereby constructing a sealed and protected high-pressure gas storage chamber system.

[0031] 2. The anti-leakage method in the installation process of the flexible sealing layer for the high-pressure gas storage chamber of the present invention is to use elastic sealant and adhesive layers to block the air leakage paths for the air leakage paths that appear in the range of the lining connecting bolts and bolt holes on the flexible sealing layer. And by the characteristic of injecting compressed air into the cave, the extrusion of the flexible sealing layer by the high-pressure gas storage environment is strengthened, improving the sealing performance of the lining connecting bolts and bolt holes, ensuring that the sealed system assembled in the artificial cave can meet the high-pressure storage standard of the artificial cave and meet the requirements for compressed air storage.

[0032] 3. The fixation of the installation process of the flexible sealing layer in the artificial underground chamber for compressed air energy storage of the present invention facilitates the transportation of each piece of the flexible sealing layer into the chamber with the assistance of the installation frame. The flexible sealing layer is placed on the surface of the telescopic support feet by using the telescopic support feet, and then the flexible sealing layer is laid on the inner wall of the lining layer of the chamber, improving the transportation and installation efficiency of the flexible sealing layer.

[0033] The present invention has completed the installation work of the flexible sealing layer in the gas storage chamber with low engineering quantity, low working hours, high efficiency and firmness through simple installation fittings, installation processes and installation steps. The implementation installation method of the present invention is more efficient, and the overall scheme is more cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0035] Figure 1 It is a schematic structural diagram of the lining layer and the flexible sealing layer of the chamber of the present invention;

[0036] Figure 2 It is a front view structural diagram of the strip connector and the metal strip connection of the present invention;

[0037] Figure 3 It is a side view structural diagram of the strip connector and the metal strip connection of the present invention;

[0038] Figure 4 It is a front view structural diagram of the strip connector type A of the present invention;

[0039] Figure 5 This is a schematic side view of the structure of a type A bead connector of the present invention;

[0040] Figure 6 This is a schematic diagram of the front view of the structure of the B-type bead connector of the present invention;

[0041] Figure 7 This is a schematic side view of the structure of a B-type bead connector of the present invention;

[0042] Figure 8 This is a schematic diagram of the front view structure of a C-type beading connector of the present invention;

[0043] Figure 9 This is a schematic side view of the C-shaped structure of the layering strip connector of the present invention;

[0044] Figure 10 This is a schematic diagram of the left side structure of a C-type beading connector of the present invention;

[0045] Figure 11 This is a schematic diagram of the front view structure of the metal layering strip of the present invention;

[0046] Figure 12 This is a schematic side view of the metal layering structure of the present invention;

[0047] Figure 13 Schematic diagram of the air leakage path of the bolt hole of the present invention;

[0048] Figure 14 This is a schematic diagram of the use structure of the elastic sealant of the present invention;

[0049] Figure 15 This is a schematic diagram of the three-dimensional structure of the flexible sealing layer splicing of the present invention;

[0050] Figure 16 Schematic diagram of the cross-sectional structure of the flexible sealing layer spliced in the present invention;

[0051] Figure 17 This is a schematic structural diagram of the flexible sealing layer of the present invention before installation;

[0052] Figure 18 This is a schematic diagram of the structure of the flexible sealing layer after it is expanded;

[0053] In the figure: 1. Flexible sealing layer; 2. Adhesive layer; 3. Bead connector; 3-1. Bead connector type A; 3-2. Bead connector type B; 3-3. Bead connector type C; 4. Metal bead; 5. Lining connection bolts; 6. Bolts and nuts; 7. Conventional bolt holes; 8. Strip bolt holes; 9. Chamber lining layer; 10. Embedded bolt sleeve; 11. Elastic sealant; 12. Contact surface; 13. Bolt hole; 14. Air leakage path; 15. Mounting frame; 16. Balance support foot; 17. Electric drive wheel equipment; 18. Telescopic support foot. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] Example 1

[0056] See also Figures 1-3 A high-pressure gas storage chamber flexible sealing layer structure includes a chamber lining layer 9 and a flexible sealing layer 1. The flexible sealing layer 1 is laid on the inner wall of the chamber lining layer 9. The flexible sealing layer 1 includes a bead connector 3 and a metal bead 4. The bead connector 3 and the metal bead 4 are staggered and covered on the flexible sealing layer 1 and pressed against the inner wall of the chamber lining layer 9. The chamber lining layer 9 is embedded with an embedded bolt sleeve 10 and a lining connection bolt 5 threadedly connected thereto. The flexible sealing layer 1 and the bead connector 3 are fixed to the chamber through the lining connection bolt 5 and the embedded bolt sleeve 10. On the chamber lining layer 9, the staggered ends of the bead connector 3 and the metal bead 4 are detachably connected by bolts and nuts 6, and the flexible sealing layer 1 is installed and fixed on the inner wall of the chamber lining layer 9 by using the lining connection bolts 5 and the bead connector 3. The staggered ends of the bead connector 3, the metal bead 4 and the bolts and nuts 6 do not contact the surface of the flexible sealing layer 1, ensuring that the nodes of the staggered ends avoid touching the surface of the flexible sealing layer 1. There is enough space to tighten the connector 3 and the metal bead 4 by the bolts and nuts 6. The detachable connection is convenient for replacing or maintaining the flexible sealing layer 1.

[0057] See also Figures 4-10 A conventional bolt hole 7 is provided in the middle of the beading connector 3. The lining connection bolt 5 is screwed into the flexible sealing layer 1 through the conventional bolt hole 7 and the beading connector 3 and fixed to the inner wall of the chamber lining layer 9. The beading connector 3 includes beading connector type A 3-1, beading connector type B 3-2 and beading connector type C 3-3. The beading connector type A 3-1 is a straight plate when viewed from the front, and has a bow-shaped cross section. The beading connector type B 3-2 is an L-shaped with a ninety-degree angle when viewed from the front, and has a Z-shaped cross section. The beading connector type C 3-3 is a T-shaped with a ninety-degree angle when viewed from the front, and has a bow-shaped cross section, and the adjacent side cross section is a Z-shaped.

[0058] See also Figures 11-12, the metal strip 4 is straight in the front view and bow-shaped in the cross-section. Bar-shaped bolt holes 8 are provided at both ends of the metal strip 4 and at the ends of the strip connecting member 3. The metal strip 4 is detachably connected to the strip connecting member 3 through bolts, nuts 6 and the bar-shaped bolt holes 8. The detachable connection facilitates the replacement and maintenance of the metal strip. To prevent problems such as errors in the embedded bolt sleeves 10 during the construction of the chamber lining layer 9 structure, errors in the processing and manufacturing of the metal strip 4, and errors during the installation of the strip connecting member 3, etc., the bar-shaped bolt holes 8 of the metal strip 4 and the strip connecting member 4 are set as long holes with an adjustable range, effectively solving the installation difficulties caused by construction errors. The metal strip 4 and the strip connecting member 4 are made of materials with bending performance and durability, and can bend smoothly along the circular arc structure in the circumferential direction of the chamber. The metal strip 4 and the strip connecting member 4 can not only easily adapt to the complex inner wall shape of the chamber lining layer 9, but also have excellent antioxidant and corrosion resistance capabilities.

[0059] Example 2

[0060] Based on Example 1, please refer to Figures 15-16 , the cross-section of the flexible sealing layer 1 is annular. The head and tail ends of two adjacent flexible sealing layers 1 overlap relatively, and the overlapping part of the flexible sealing layer 1 is bonded through the adhesive layer 2. By installing each flexible sealing layer with the chamber lining layer, it is ensured that the flexible sealing layer is safely and firmly installed on the inner surface of the chamber lining layer, thereby constructing a sealed and protected high-pressure gas storage chamber system.

[0061] Example 3

[0062] Based on Example 2, please refer to Figures 13-14 , bolt holes 13 corresponding to the lining connecting bolts 5 are provided on the surface of the flexible sealing layer 1. Air leakage paths 14 are formed between the flexible sealing layer 1 and the embedded bolt sleeve 10, the lining connecting bolt 5, and the strip connecting member 3 respectively. A contact surface 12 is formed between the flexible sealing layer 1 and the embedded bolt sleeve 10 and the bolt hole 13. The contact surface 12 is filled with elastic sealant 11. The elastic sealant 11 is a jelly-like substance, which is used to block the gaps of air leakage and can also bond and fix the lining connecting bolt 5. The adhesive layer 2 and the elastic sealant 11 ensure that the flexible sealing layer 1 is safely and firmly adhered to the inner surface of the chamber lining layer 9, thereby establishing a sealed and protected high-pressure gas storage chamber system.

[0063] Example 4

[0064] Based on Example 1, please refer to Figures 17-18, A mounting rack for laying a flexible sealing layer. The mounting rack 15 is used for laying the flexible sealing layer 1 on the inner wall of the chamber lining layer 9 in the flexible sealing layer installation process. An equilibrium support foot 16 is installed at the bottom of the mounting rack 15, and an electric drive wheel device 17 is installed at the bottom of the equilibrium support foot 16. Telescopic support feet 18 arranged in a ring are provided on the outer side of the mounting rack 15, and the flexible sealing layer 1 is laid on the surface of the telescopic support feet 18.

[0065] During specific implementation, when the cross-sectional dimension of the chamber scale is relatively small, the installation of the flexible sealing layer 1 can be operated through a mounting rack in a flexible sealing layer installation process. The mounting rack 15 is made of steel structure materials, and its structural form is similar to a temporary internal support of a tunnel. Multiple radial telescopic support feet 18 are provided, and the telescopic support feet 18 are provided with a telescopic function. When installing the flexible sealing layer 1, first shorten each telescopic support foot 18 to the shortest length, spread out the flexible sealing layer 1 and lay it on the mounting rack 15, and then slowly extend each telescopic support foot 18 to slowly expand the flexible sealing layer 1 until it fits against the inner wall of the chamber lining layer 9, and then the operations such as manual punching and installation of the flexible sealing layer 1 can be assisted.

[0066] There is an electric drive wheel device 17 at the bottom of the mounting rack 15, which is convenient for walking and fixing stability in the chamber. In addition, since the overall weight of the flexible sealing layer 1 is not large, the mounting rack 15 does not require great strength and stiffness, and can be designed and manufactured as lightweight as possible to lift the flexible sealing layer 1 to fit against the inner lining wall, and then install it manually.

[0067] With the assistance of the mounting rack 15, it is convenient to transport each flexible sealing layer 1 into the chamber, and the flexible sealing layer 1 is placed on the surface of the telescopic support feet 18 by using the telescopic support feet 18, which improves the transportation and installation efficiency of the flexible sealing layer 1.

[0068] Through simple installation fittings, simple installation processes and simple installation procedures, the installation of the flexible sealing layer in the gas storage chamber with low engineering quantity, low working hours, high efficiency and firmness is completed. The implementation steps of the present invention are simpler and the overall scheme is more cost-effective.

[0069] Example 5

[0070] A flexible sealing layer installation process for a high-pressure gas storage chamber is as follows:

[0071] S1: According to the inner wall contour and inner diameter of the chamber, the self-weight loads of the flexible sealing layer 1, the metal pressing strip 4 and the pressing strip connecting piece 3, combined with calculation analysis or test simulation, determine the installation positions and spacings of the lining connecting bolts 5 and the cross-sectional dimensions and lengths of the metal pressing strips 4, aiming to ensure that when the flexible sealing layer 1 is installed on the chamber lining layer 9 through bolts, pressing strip connecting pieces 3 and metal pressing strips 4 fittings, it can fit against the inner wall to prevent the sealing layer from being uneven, sagging and drooping.

[0072] S2: According to the installation positions and spacings of the lining connecting bolts 5, corresponding embedded bolt sleeves 10 are embedded during the construction of the chamber lining layer 9; the position and angle accuracy control of the embedded bolt sleeves 10 should be well done. The embedded bolt sleeves 10 are in a form with one end closed, and the lining connecting bolts 5 are matched with the open ends of the embedded bolt sleeves 10 to ensure the installation of the later flexible sealing layer 1, the strip connecting piece 3 and the metal strip 4. Since the larger the number of the embedded bolt sleeves 10, the more the installation quantity of the metal strips 4 will be, increasing the risk of errors. Therefore, appropriately reducing the embedded quantity of the bolt sleeves and increasing the length of the metal strips during design can improve the installation difficulty and installation of the later metal strips.

[0073] S3: According to the connection directions and quantities of the metal strips 4, different models of strip connecting pieces 3 are selected. The strip connecting pieces 3 and the metal strips 4 are connected by bolts and nuts 6. The bolt holes on the metal strips 4 are processed into long holes for docking installation with the corresponding strip connecting pieces 3. The metal fittings such as the lining connecting bolts 5, the embedded bolt sleeves 10, the strip connecting pieces 3 and the metal strips 4 can all adopt anti-rust materials or carry out targeted anti-rust treatment.

[0074] S4: After the construction of the chamber lining layer 9 is completed, before installing the flexible sealing layer 1, the inner wall of the lining structure is leveled first, and the floating slurry and impurities around the embedded bolt sleeves 10 of the embedded sleeves are peeled off cleanly to ensure that the outer end faces of the embedded bolt sleeves 10 are flush with the inner wall of the chamber lining layer 9, ensuring a smooth fit with the flexible sealing layer 1.

[0075] S5: When laying the flexible sealing layer 1, bolt holes 13 are drilled on the flexible sealing layer 1 at the site using drilling equipment, ensuring that the bolt holes 13 are aligned with the positions of the embedded bolt sleeves 10.

[0076] S6: The lining connecting bolts 5 are passed through the strip connecting pieces 3 and the flexible sealing layer 1 and then screwed into the embedded bolt sleeves 10, thereby pressing and fixing the flexible sealing layer 1 on the inner wall of the chamber lining layer 9, and a detachable connecting metal strip 4 is installed between two adjacent strip connecting pieces 3.

[0077] S7: The flexible sealing layer 1 is installed and fixed on the inner wall of the chamber lining layer 9 in sequence by using the lining connecting bolts 5 and the strip connecting pieces 3 to form "multi-point fixation". In order to strengthen the fixation of the flexible sealing layer 1 on the inner lining, especially to prevent the flexible sealing layer in the arch roof range of the chamber from sagging, a "strip fixation" method is added during this installation process, and a detachable connecting metal strip 4 is installed between two adjacent strip connecting pieces 3. One metal strip 4 can be installed between every two strip connecting pieces 3. The metal strips 4 can be arranged in two directions, the axial direction and the circumferential direction of the chamber. The strip connecting pieces 3 and the metal strips 4 are connected by bolts and nuts 6, and different models of strip connecting pieces 3 can be selected according to the different connection directions and quantities of the metal strips 4.

[0078] S8: Through the above installation process and installation fittings, the flexible sealing layer 1 is assembled into a complete sealing cavity on the inner wall of the chamber lining layer 9. The flexible sealing layer 1 can be in a good fitting state with the chamber lining layer 9 as a whole during the gas storage operation period and under the standard atmospheric pressure state during maintenance. Finally, through the leakage blocking treatment of the bolt holes 13 and joints of the flexible sealing layer 1, a flexible sealing system that meets the sealing requirements is formed. The mechanical installation method of the bolt fittings can ensure that the flexible sealing layer is safely, durably and firmly attached to the chamber lining layer 9, meeting the relevant requirements of the compressed air energy storage chamber.

[0079] Example 6

[0080] Based on Example 5, a method for preventing leakage in the installation process of the flexible sealing layer structure of a high-pressure gas storage chamber is as follows:

[0081] S1: During the laying process of the flexible sealing layer 1, the embedded bolt sleeves 10 and the corresponding bolt holes 13 on the inner wall of the flexible sealing layer 1 are drilled. The drilled bolt holes 13 should be slightly smaller than the screw diameter of the lining connecting bolt 5; because the flexible sealing layer 1 is elastic, when the bolt holes 13 are small, when the screw passes through the flexible sealing layer 1, due to the rebounding force, they will be more tightly fitted.

[0082] S2: The contact surface 12 range between the flexible sealing layer 1 and the embedded bolt sleeve 10 is coated with elastic sealing glue 11, and the elastic sealing glue 11 is coated continuously and completely. Based on the principle that the sandwich layer as the contact surface 12 is completely filled with uniform elastic sealing glue 11, after the coating is completed, the flexible sealing layer 1 is attached to the inner wall of the chamber lining layer 9.

[0083] S3: Finally, the lining connecting bolt 5 is installed. Before installing the lining connecting bolt 5, the inner circumferential surface of the bolt hole 13 of the flexible sealing layer 1 is coated with elastic sealing glue 11, and the elastic sealing glue 11 is coated continuously, completely and fully. Then the lining connecting bolt 5 is screwed in. The screw of the lining connecting bolt 5 and the inner circumferential surface of the bolt hole 13 of the flexible sealing layer 1 are filled with elastic sealing glue 11; during the process of screwing in the lining connecting bolt 5, the state of the elastic sealing glue 11 between the inner wall of the flexible sealing glue bolt hole 13 and the lining connecting bolt 5 should be observed, and the elastic sealing glue 11 should be filled in as needed in a timely manner until the inner circumferential surface of the conventional bolt hole 7 of the lining connecting bolt 5 and the flexible sealing layer 1 is filled with elastic sealing glue 11. For the air leakage path that appears in the range of the lining connecting bolt 5 and the bolt hole 13 on the flexible sealing layer 1, the elastic sealing glue 11 is used to block the air leakage path.

[0084] S4: When the flexible sealing layer 1 is spliced and installed at the head and tail, apply an adhesive layer 2 with a certain width to the outer walls of the head and tail ends of the flexible sealing layer 1 along the direction of the annular splicing seam. The head and tail splicing ends of the flexible sealing layer 1 are also bonded together, and the adhesive layer 2 is used to block the air leakage path of the flexible sealing layer 1.

[0085] Among them, the adhesive layer 2 and the elastic sealant 11 ensure that the flexible sealing layer 1 is safely and firmly adhered to the inner surface of the chamber lining layer 9, thereby establishing a sealed and protected high-pressure gas storage chamber system. Fill the chamber with compressed air. The flexible sealing layer 1 is subjected to the internal pressure of the compressed air in the radial direction of the chamber, and it will "expand" in both the axial and circumferential directions of the chamber due to the pressure in the radial direction of the chamber. Under the expansion effect, the flexible sealing layer 1 and the lining connection bolt 5 will be closer, and the possible leakage gaps will be compressed and filled completely, making the flexible sealing layer 1, the elastic sealant 11 and the lining connection bolt 5 fit more closely, blocking the air leakage path and ensuring no leakage at this node. Under the expansion effect, the flexible sealing layer 1 and the embedded bolt sleeve 10 of the chamber lining layer 9 are also closer, and the gaps that have been filled with the elastic sealant 11 will be compressed to be completely dense, making the flexible sealing layer 1, the elastic sealant 11 and the chamber lining layer 9 fit more closely, blocking the air leakage path. By the characteristic of injecting air into the cave, strengthen the extrusion of the high-pressure gas storage environment on the flexible sealing layer 1, improve the sealing performance of the lining connection bolt 5, the bolt hole 13 and the elastic sealant 11, and ensure that the sealed system assembled in the artificial cave can meet the high-pressure storage standard of the artificial cave and meet the requirements for compressed air storage.

[0086] The installation and fixation of the flexible sealing layer 1 in the artificial underground chamber for compressed air energy storage of the present invention. In terms of installation difficulty, material processing and production, etc., compared with the traditional steel lining seal or the proposed integral airbag type flexible seal, the operation of the present invention is simpler and the overall is more economical, greatly reducing the installation difficulty and installation cycle of the sealing layer on the chamber lining structure, laying a solid foundation for the formation of the flexible sealing system, and creating conditions for lower investment in high-pressure gas storage chambers for compressed air energy storage projects.

[0087] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0088] The preferred embodiments of the present invention disclosed above are only used to assist in the description of the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A high-pressure gas storage chamber flexible sealing layer structure, comprising a chamber lining layer (9) and a flexible sealing layer (1), wherein the flexible sealing layer (1) is laid on the inner wall of the chamber lining layer (9), and is characterized in that: The flexible sealing layer (1) comprises a beading connector (3) and a metal beading (4), wherein the beading connector (3) and the metal beading (4) are staggeredly covered on the flexible sealing layer (1) and pressed against the inner wall of the chamber lining layer (9), wherein the chamber lining layer (9) is embedded with an embedded bolt sleeve (10) and a lining connection bolt (5) threadedly connected thereto, and the flexible sealing layer (1) and the beading connector (3) are connected to each other via the lining connection bolt (5) and the embedded bolt sleeve. The tube (10) is fixed to the chamber lining layer (9), the staggered ends of the beading connector (3) and the metal beading (4) are detachably connected by bolts and nuts (6), a conventional bolt hole (7) is opened in the middle of the beading connector (3), the lining connection bolt (5) is screwed into the flexible sealing layer (1) through the conventional bolt hole (7) and the beading connector (3) and fixed to the inner wall of the chamber lining layer (9), and the beading connector (3) has A beading connector type A (3-1), a beading connector type B (3-2) and a beading connector type C (3-3), wherein the beading connector type A (3-1) is in the shape of a straight plate when viewed from the front, and has a bow-shaped cross section; the beading connector type B (3-2) is in the shape of an L with a ninety-degree angle when viewed from the front, and has a Z-shaped cross section; the beading connector type C (3-3) is in the shape of a T with a ninety-degree angle when viewed from the front, and has a bow-shaped cross section, and the adjacent side cross section is in the shape of a Z; the surface of the flexible sealing layer (1) is provided with bolt holes (13) corresponding to the lining connection bolts (5); the flexible sealing layer (1) forms air leakage paths (14) with the embedded bolt sleeves (10), the lining connection bolts (5) and the beading connector (3), respectively; a contact surface (12) is formed between the flexible sealing layer (1), the embedded bolt sleeves (10) and the bolt holes (13); the contact surface (12) is filled with elastic sealant (11).

2. The flexible sealing layer structure of the high-pressure gas storage chamber according to claim 1, characterized in that: The metal strip (4) is in the shape of a straight plate when viewed from the front, and has an arc-shaped cross section; strip-shaped bolt holes (8) are provided at both ends of the metal strip (4) and the end of the strip connector (3); the metal strip (4) is detachably connected to the strip connector (3) via bolts and nuts (6).

3. The flexible sealing layer structure of the high-pressure gas storage chamber according to claim 2, characterized in that: The staggered ends of the bead connector (3), the metal bead (4), the bolts, and the nuts (6) do not contact the surface of the flexible sealing layer (1).

4. The flexible sealing layer structure of a high-pressure gas storage chamber according to any one of claims 1 to 3, characterized in that: The cross section of the flexible sealing layer (1) is ring-shaped, the head and tail ends of two adjacent flexible sealing layers (1) are relatively overlapped, and the overlapping portions of the flexible sealing layers (1) are bonded via an adhesive layer (2).

5. A process for installing a flexible sealing layer of a high-pressure gas storage chamber, characterized in that: Based on the flexible sealing layer structure of a high-pressure gas storage chamber in claim 1, the steps are as follows: S1: Based on the contour and inner diameter of the inner wall of the cavern, the self-weight load of the flexible sealing layer (1), the metal bead (4) and the bead connector (3), combined with calculation analysis or test simulation, determine the installation position and spacing of the lining connection bolts (5) and the cross-sectional size and length of the metal bead (4); S2: According to the installation position and spacing of the lining connection bolts (5), the corresponding embedded bolt sleeves (10) are embedded during the construction of the chamber lining layer (9); the embedded bolt sleeves (10) should be accurately controlled in position and angle, and the embedded bolt sleeves (10) are closed at one end, and the lining connection bolts (5) are matched with the open end of the embedded bolt sleeves (10); S3: Select different types of beading connectors (3) according to the connection direction and number of the metal beading (4). The beading connector (3) is connected to the metal beading (4) by bolts and nuts (6). The bolt holes on the metal beading (4) are made into long holes, suitable for docking and installation with the corresponding beading connector (3); S4: After the construction of the chamber lining layer (9) is completed, the inner wall of the lining structure is first leveled before the flexible sealing layer (1) is installed, and the slurry and impurities around the embedded casing and embedded bolt casing (10) are peeled off cleanly to ensure that the outer end surface of the embedded bolt casing (10) is flush with the inner wall of the chamber lining layer (9); S5: When laying the flexible sealing layer (1), a punching device is used on site to punch bolt holes (13) on the flexible sealing layer (1), ensuring that the bolt holes (13) are aligned with the positions of the embedded bolt sleeves (10); S6: The lining connection bolt (5) is passed through the beading connector (3) and the flexible sealing layer (1) and then screwed into the embedded bolt sleeve (10), thereby pressing and fixing the flexible sealing layer (1) on the inner wall of the chamber lining layer (9), and installing a detachable connecting metal bead (4) between two adjacent beading connectors (3); S7: The metal strip (4) can be arranged in two directions, axial and circumferential, of the chamber. The strip connector (3) and the metal strip (4) are connected by bolts and nuts (6). Different types of strip connectors (3) can be selected according to different connection directions and numbers of the metal strips (4); S8: Through the above-mentioned installation process and installation accessories, the flexible sealing layer (1) is assembled on the inner wall of the chamber lining layer (9) to form a complete sealing cavity.

6. The method for preventing leakage in the installation process of the flexible sealing layer of a high-pressure gas storage chamber according to claim 5, characterized in that: Here are the steps: S1: During the laying process of the flexible sealing layer (1), the embedded bolt sleeves (10) and the corresponding bolt holes (13) on the inner wall of the flexible sealing layer (1) are punched. The punched bolt holes (13) should be slightly smaller than the screw diameter of the lining connection bolts (5); S2: Apply elastic sealant (11) to the contact surface (12) between the flexible sealing layer (1) and the embedded bolt sleeve (10), ensuring that the elastic sealant (11) is applied continuously and completely. After the application is completed, the flexible sealing layer (1) is attached to the inner wall of the chamber lining layer (9); S3: Install the lining connection bolts (5). Before installing the lining connection bolts (5), apply elastic sealant (11) on the inner circumference of the bolt hole (13) of the flexible sealing layer (1). Ensure that the elastic sealant (11) is applied continuously, completely and fully. Then, screw the lining connection bolts (5) in. The screw of the lining connection bolts (5) and the inner circumference of the bolt hole (13) of the flexible sealing layer (1) are filled with the elastic sealant (11). S4: When the flexible sealing layer (1) is installed by splicing the ends together, a certain width of adhesive layer (2) is applied to the outer wall of the ends of the flexible sealing layer (1) along the direction of the annular splicing seam, and the ends of the flexible sealing layer (1) are also bonded together.

7. A mounting frame in a high-pressure gas storage chamber flexible sealing layer installation process, using the high-pressure gas storage chamber flexible sealing layer installation process as claimed in claim 5, characterized in that: A balancing support foot (16) is installed at the bottom of the mounting frame (15), an electric drive wheel device (17) is installed at the bottom of the balancing support foot (16), and a circularly arranged telescopic support foot (18) is provided on the outside of the mounting frame (15), and the flexible sealing layer (1) is laid on the surface of the telescopic support foot (18).

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