Flexible sealing layer structure of high-pressure gas storage chamber and mounting process

Abstract

The invention relates to the technical field of compressed air energy storage, and discloses a high-pressure gas storage chamber flexible sealing layer structure and a mounting technology, the high-pressure gas storage chamber flexible sealing layer structure comprises a chamber lining layer and a flexible sealing layer, the flexible sealing layer is laid on the inner wall of the chamber lining layer, and the flexible sealing layer comprises a pressing strip connecting piece and a metal pressing strip; the pressing strip connecting pieces and the metal pressing strips cover the flexible sealing layer in a staggered mode and are pressed on the inner wall of the chamber lining layer, and embedded bolt sleeves and lining connecting bolts in threaded connection with the embedded bolt sleeves are embedded in the chamber lining layer. Bolt sleeves are pre-buried on the lining layer of the chamber, the lining connecting bolts and the pressing strip connecting pieces are used for installing, attaching and fixing the flexible sealing layer on the inner wall of the lining layer of the chamber, and bolt holes in the flexible sealing layer are sealed, so that the flexible sealing layer is safely and stably installed on the inner surface of the lining layer of the chamber. And then a high-pressure gas storage chamber system with sealing protection is constructed.

Description

Technical Field

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

[0002] Compressed air energy storage technology is a large-capacity, long-term physical energy storage technology that is being vigorously developed and promoted in China. There is no combustion of fossil fuels or emission of harmful substances in the energy storage process, and it has the characteristics of large capacity and long-term storage. It can greatly improve the spatiotemporal structure of power generation and power consumption of the power grid, improve the peak-shaving capacity of the power grid, and solve the intermittent problem of renewable energy. There are now a large number of compressed air energy storage projects under construction and planned across the country. Due to the high investment in ground storage tanks and the small number of available salt caverns, the use of artificial chambers as high-pressure air storage containers has become the most commonly used solution in compressed air energy storage system projects under construction and planned. At present, the air sealing layer in artificial caverns is mainly made of steel lining. However, when the high-strength steel lining forms a sealing layer in the cave, it is difficult to weld and assemble the steel lining in the cave, the installation steps are complicated, 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 is proposed to process the polymer sealing layer into an integral airbag as the sealing layer in the cave. However, the integral airbag sealing layer has the disadvantages of being difficult to transport, having high requirements for cavern space, and being difficult to install.

[0003] The existing connection methods between the flexible sealing layer and the chamber lining structure mainly include direct bonding and mechanical connection. The bonding method is to bond the flexible sealing layer to the inner wall of the lining through a specific adhesive, but the adhesive has poor adhesion and durability, and 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 the flexible sealing layer into 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 is also a leakage problem between the flexible sealing layer and the lining. At the same time, the huge internal air pressure of the compressed air can easily destroy 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 solved urgently 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 with durability, stability and safety installed on the chamber lining for sealing and storing compressed air. The present invention provides the following technical solutions: A flexible sealing layer structure of a high-pressure gas storage chamber comprises a chamber lining layer and a flexible sealing layer, wherein the flexible sealing layer is laid on the inner wall of the chamber lining layer, the flexible sealing layer comprises a bead connector and a metal bead, the bead connector and the metal bead are staggeredly 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, and the staggered ends of the bead connector and the metal bead are detachably connected by bolts and nuts.

[0006] By adopting the above technical solution, bolt sleeves are pre-embedded on the chamber lining layer, and the flexible sealing layer is installed and fixed on the inner wall of the chamber lining layer by using lining connecting bolts and pressure strip connectors.

[0007] While adopting the above-mentioned technical solutions, the present invention may also adopt or combine the following technical solutions: bolt holes corresponding to the lining connection bolts are opened on the surface of the flexible sealing layer, and air leakage paths are formed between the flexible sealing layer and the embedded bolt sleeves, the lining connection bolts, and the pressure strip connectors respectively, and a contact surface is formed between the flexible sealing layer and the embedded bolt sleeves and the bolt holes, and the contact surface is filled with elastic sealant.

[0008] As a preferred technical solution of the present invention, a conventional bolt hole is opened in the middle of the beading connector, and the lining connection bolts are tightened in the flexible sealing layer through the conventional bolt holes and the beading connector and fixed on the inner wall of the chamber lining layer. The beading connectors include beading connector type A, beading connector type B and beading connector type C. The beading connector type A is a straight plate-shaped when viewed from the front, and has a bow-shaped cross-section; the beading connector type B is an L-shaped with an angle of ninety degrees when viewed from the front, and has a Z-shaped cross-section; the beading connector type C is a T-shaped with an angle of ninety degrees when viewed from the front, and has a bow-shaped cross-section, and the adjacent side cross-sections are Z-shaped.

[0009] As a preferred technical solution of the present invention, the metal pressure strip is in the shape of a straight plate when viewed from the front, and has an arc-shaped cross-section; strip bolt holes are provided at both ends of the metal pressure strip and at the end of the pressure strip connector, and the metal pressure strip is detachably connected to the pressure strip connector through bolts, nuts and the strip bolt holes.

[0010] As a preferred technical solution of the present invention, the layer strip connector, the metal layer strip and the staggered ends of the bolts and nuts do not contact the surface of the flexible sealing layer.

[0011] 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.

[0012] 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.

[0013] A high-pressure gas storage chamber flexible sealing layer installation process, the steps are as follows: S1: According to the contour and inner diameter of the inner wall of the cavern, the self-weight load of the flexible sealing layer, metal strips and strip connectors, etc., combined with calculation analysis or test simulation, determine the installation position and spacing of the lining connection bolts and the cross-sectional size and length of the metal strips.

[0014] S2: According to the installation position and spacing of the lining connection bolts, the corresponding embedded bolt sleeves shall be embedded during the construction of the chamber lining layer; the position and angle of the embedded bolt sleeves shall be accurately controlled. The embedded bolt sleeves are closed at one end, and the lining connection bolts are matched with the open end of the embedded bolt sleeves.

[0015] S3: Select different types of strip connectors according to the connection direction and quantity of the metal strip. The strip connectors are connected to the metal strips through bolts and nuts. The bolt holes on the metal strips are made into long holes, which are suitable for docking and installation with the corresponding strip connectors.

[0016] S4: After the construction of the chamber lining is completed, the inner wall of the lining structure shall be leveled before the flexible sealing layer is installed, and the floating slurry and impurities around the embedded casing and embedded bolt casing shall be peeled off to ensure that the outer end face of the embedded bolt casing is flush with the inner wall of the chamber lining.

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

[0018] S6: Pass the lining connection bolts through the pressure strip connector and the flexible sealing layer and screw them into the embedded bolt sleeve, so as to press and fix the flexible sealing layer on the inner wall of the chamber lining layer, and install a detachable connecting metal pressure strip between two adjacent pressure strip connectors.

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

[0020] S8: Through the above-mentioned installation process and installation accessories, the flexible sealing layer is assembled on the inner wall of the chamber lining layer to form a complete sealing cavity.

[0021] A leakage prevention method in the installation process of a flexible sealing layer of a high-pressure gas storage chamber, the steps are as follows: S1: During the laying process of the flexible sealing layer, the embedded bolt sleeves and corresponding bolt holes on the inner wall of the flexible sealing layer are completed. The drilled bolt holes should be slightly smaller than the screw diameter of the lining connection bolts.

[0022] S2: Apply elastic sealant to the contact surface between the flexible sealing layer and the embedded bolt sleeve to ensure that the elastic sealant is applied continuously and completely. After the application is completed, the flexible sealing layer is attached to the inner wall of the chamber lining layer.

[0023] S3: Install the lining connection bolts. Before installing the lining connection bolts, apply elastic sealant on the inner circumference of the bolt hole of the flexible sealing layer to ensure that the elastic sealant is applied continuously, completely and fully. Then screw in the lining connection bolts. The screw of the lining connection bolts and the inner circumference of the bolt hole of the flexible sealing layer are filled with elastic sealant.

[0024] S4: When the flexible sealing layer is installed by splicing the ends, a certain width of adhesive layer is applied to the outer wall of the ends of the flexible sealing layer along the direction of the annular splicing seam, and the ends of the flexible sealing layer are also bonded together.

[0025] By adopting the above technical solution, the air leakage path that occurs in the lining connection bolts and bolt holes on the flexible sealing layer is blocked by elastic sealant and adhesive layer. When the chamber is filled with compressed air, the flexible sealing layer is subjected to the internal pressure of the compressed air in the radial direction of the chamber, and it will "expand" along the axis and circumferential direction 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 connection bolts will be closer, and the existing gaps will be compressed to be completely filled, so that the flexible sealing layer, elastic sealant and lining connection bolts fit more tightly, cut off the air leakage path, and ensure that no leakage occurs at this node. At the same time, under the expansion effect, the embedded bolt sleeves of the flexible sealing layer and the chamber lining layer are also closer, and the gaps that have been filled by the sealant will be compressed to be completely dense, so that the flexible sealing layer, elastic sealant and chamber lining layer fit more tightly, cut off the air leakage path.

[0026] A mounting frame in a flexible sealing layer installation process, the mounting frame is used to lay the flexible sealing layer on the inner wall of a chamber lining layer, a balancing support foot is installed at the bottom of the mounting frame, an electric drive wheel device is installed at the bottom of the balancing support foot, and a ring-shaped telescopic support foot is arranged on the outer side of the mounting frame, and the flexible sealing layer is laid on the surface of the telescopic support foot.

[0027] By adopting the above technical solution, with the assistance of the installation frame, it is convenient to transport each flexible sealing layer into the chamber, place the flexible sealing layer on the surface of the telescopic supporting feet using the telescopic supporting feet, and then lay the flexible sealing layer on the inner wall of the chamber lining layer, thereby improving the transportation and installation efficiency of the flexible sealing layer.

[0028] Compared with the prior art, the present invention has the following beneficial effects: 1. The flexible sealing layer installation process of the high-pressure gas storage chamber of the present invention is to embed bolt sleeves on the chamber lining layer, and use lining connecting bolts and pressure strip connectors to install and fix the flexible sealing layer on the inner wall of the chamber lining layer, and 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 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.

[0029] 2. The method for preventing leakage in the installation process of the flexible sealing layer of the high-pressure gas storage chamber of the present invention targets the air leakage path that appears in the lining connecting bolts and bolt holes on the flexible sealing layer, and uses elastic sealant and glue layer to block the air leakage path, and through the characteristics of compressed air injected into the hole, strengthens the squeezing of the flexible sealing layer by the high-pressure gas storage environment, improves the sealing performance of the lining connecting bolts and bolt holes, and ensures that the sealing system assembled in the artificial chamber can meet the high-pressure storage standards of the artificial chamber and meet the compressed air storage requirements.

[0030] 3. The present invention is used for fixing the installation process of the flexible sealing layer in an artificial underground chamber for compressed air energy storage. With the assistance of a mounting frame, it is convenient to transport each flexible sealing layer into the chamber, and the flexible sealing layer is placed on the surface of the telescopic supporting feet using telescopic supporting feet. The flexible sealing layer is then laid on the inner wall of the chamber lining layer, thereby improving the transportation and installation efficiency of the flexible sealing layer.

[0031] The present invention completes the low-workload, low-time, efficient and firm installation of the flexible sealing layer in the gas storage chamber through simple installation accessories, installation processes and installation steps. The installation method implemented by the present invention is more efficient and the overall solution is more cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of laying the chamber lining layer and the flexible sealing layer of the present invention; Figure 2 This is a front view structural diagram of the connection between the pressure strip connector and the metal pressure strip of the present invention; Figure 3 It is a schematic diagram of the side view structure of the connection between the pressure strip connector and the metal pressure strip of the present invention; Figure 4 This is a front view structural diagram of a type A bead connector of the present invention; Figure 5 This is a schematic diagram of the side view structure of the A-type layer strip connector of the present invention; Figure 6 This is a schematic diagram of the front view structure of a B-type layering connector of the present invention; Figure 7 This is a schematic side view of the structure of a B-type beading connector of the present invention; Figure 8 This is a schematic diagram of the front view structure of a C-type layering strip connector of the present invention; Fig. 9 This is a schematic diagram of the C-shaped side view of the layering strip connector of the present invention; Fig.10 This is a left-side structural schematic diagram of a C-type pressure strip connector of the present invention; Fig.11 This is a schematic diagram of the front view structure of the metal layering strip of the present invention; Fig.12 It is a schematic diagram of the side view structure of the metal layering strip of the present invention; Fig.13 It is a schematic diagram of the air leakage path of the bolt hole of the present invention; Fig.14 This is a schematic diagram of the use structure of the elastic sealant of the present invention; Fig.15 This is a schematic diagram of a three-dimensional structure of a flexible sealing layer spliced ​​in the present invention; Fig.16 It is a schematic diagram of the cross-sectional structure of the splicing of the flexible sealing layer of the present invention; Fig.17 This is a schematic diagram of the structure of the flexible sealing layer of the present invention before installation; Fig.18 This is a schematic diagram of the structure of the flexible sealing layer after it is expanded; 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

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1-Figure 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, and there is enough space for the bead connector 3 and the metal bead 4 to pass through the bolts and nuts 6. The detachable connection is convenient for replacing or maintaining the flexible sealing layer 1.

[0036] See also Figure 4-Figure 10 A conventional bolt hole 7 is provided in the middle of the bead connector 3. The lining connection bolt 5 is screwed into the flexible sealing layer 1 through the conventional bolt hole 7 and the bead connector 3 and fixed to the inner wall of the chamber lining layer 9. The bead connector 3 includes a bead connector type A 3-1, a bead connector type B 3-2 and a bead connector type C 3-3. The bead connector type A 3-1 is a straight plate-shaped when viewed from the front, and has a bow-shaped cross section. The bead connector type B 3-2 is an L-shaped with an angle of ninety degrees when viewed from the front, and has a Z-shaped cross section. The bead connector type C 3-3 is a T-shaped with an angle of ninety degrees when viewed from the front, and has a bow-shaped cross section, and the adjacent side cross section is a Z-shaped.

[0037] See also Figure 11-Figure 12 The metal bead 4 is straight plate-shaped when viewed from the front, and has an arch-shaped cross section. Both ends of the metal bead 4 and the end of the bead connector 3 are provided with strip bolt holes 8. The metal bead 4 is detachably connected to the bead connector 3 through bolts and nuts 6 and the strip bolt holes 8. The detachable connection facilitates the replacement and maintenance of the metal bead. In order to prevent the errors of the embedded bolt sleeves 10 during the construction of the chamber lining layer 9 structure, the errors in the processing and manufacturing of the metal bead 4, and the errors during the installation of the bead connector 3, the strip bolt holes 8 of the metal bead 4 and the bead connector 3 are set as long holes with an adjustable range, which effectively solves the installation difficulties caused by construction errors. The metal bead 4 and the bead connector 3 are made of materials with bending and durability, and can be smoothly bent along the circular arc structure of the chamber. The metal bead 4 and the bead connector 3 can not only easily adapt to the complex inner wall shape of the chamber lining layer 9, but also have excellent anti-oxidation and anti-corrosion capabilities.

[0038] Example 2

[0039] Based on Example 1, please refer to Figure 15-16 The cross section of the flexible sealing layer 1 is ring-shaped, the head and tail ends of two adjacent flexible sealing layers 1 overlap relatively, and the overlapping parts of the flexible sealing layers 1 are bonded by 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.

[0040] Example 3

[0041] Based on Example 2, please refer to Figure 13-Figure 14 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 an air leakage path 14 with the embedded bolt sleeve 10, the lining connection bolts 5, and the pressure strip connector 3. The flexible sealing layer 1 forms a contact surface 12 with 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 colloid, which is used to block the gap of air leakage and can also bond and fix the lining connection bolts 5. The adhesive layer 2 and the elastic sealant 11 ensure that the flexible sealing layer 1 is safely and firmly attached to the inner surface of the chamber lining layer 9, thereby establishing a sealed and protected high-pressure gas storage chamber system.

[0042] Example 4

[0043] Based on Example 1, please refer to Figure 17-Figure 18 A mounting frame for laying a flexible sealing layer, the mounting frame 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, 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 ring-shaped telescopic support foot 18 is arranged on the outer side of the mounting frame 15, and the flexible sealing layer 1 is laid on the surface of the telescopic support foot 18.

[0044] In specific implementation, when the cross-sectional size of the chamber is relatively small, the installation of the flexible sealing layer 1 can be operated through a mounting frame in a flexible sealing layer installation process. The mounting frame 15 is made of steel structure material, and the structural form is similar to the temporary internal support of the tunnel. A plurality of radial telescopic support feet 18 are arranged, and the telescopic support feet 18 are provided with a telescopic function. When installing the flexible sealing layer 1, each telescopic support foot 18 is first shortened to the shortest length, and the flexible sealing layer 1 is spread out and laid on the mounting frame 15, and then each telescopic support foot 18 is slowly extended, and the flexible sealing layer 1 is slowly stretched out until it fits onto the inner wall of the chamber lining layer 9, and then the manual drilling and installation of the flexible sealing layer 1 can be assisted.

[0045] An electric drive wheel device 17 is provided at the bottom of the mounting frame 15, which is convenient for walking in the chamber and for fixing stability. In addition, since the overall weight of the flexible sealing layer 1 is not large, the mounting frame 15 does not require greater strength and rigidity, and can be designed and manufactured as light as possible. The flexible sealing layer 1 is lifted up and fitted to the inner wall of the lining, and then installed manually.

[0046] With the assistance of the mounting frame 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 supporting feet 18 by using the telescopic supporting feet 18 , thereby improving the transportation and installation efficiency of the flexible sealing layer 1 .

[0047] Through simple installation accessories, simple installation process and simple installation sequence, the flexible sealing layer in the gas storage chamber is installed with low engineering workload, low working hours, high efficiency and firmness. The implementation steps of the present invention are simpler and the overall solution is more cost-effective.

[0048] Example 5

[0049] A high-pressure gas storage chamber flexible sealing layer installation process, the steps are as follows: S1: According to the contour and inner diameter of the inner wall of the chamber, the self-weight load of the flexible sealing layer 1, the metal bead 4 and the bead connector 3, etc., combined with calculation analysis or experimental 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. The purpose is to ensure that the flexible sealing layer 1 can fit on the inner wall when it is installed on the chamber lining layer 9 through bolts, bead connectors 3, metal bead 4 and other accessories, to prevent the sealing layer from being uneven and drooping.

[0050] 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 to ensure the installation of the later flexible sealing layer 1, the bead connector 3 and the metal bead 4. Since the more the number of embedded bolt sleeves 10, the more the number of metal bead 4 will be installed, increasing the risk of error, so appropriately reducing the number of embedded bolt sleeves and increasing the length of the metal bead during design can increase the difficulty and installation of the later metal bead.

[0051] S3: Different types of bead connectors 3 are selected according to the connection direction and number of the metal bead 4. The bead connector 3 is connected to the metal bead 4 by bolts and nuts 6. The bolt holes on the metal bead 4 are treated as long holes, which are suitable for docking and installation with the corresponding bead connector 3. Metal accessories such as lining connection bolts 5, embedded bolt sleeves 10, bead connectors 3 and metal bead 4 can all be made of anti-corrosion materials or undergo targeted anti-corrosion treatment.

[0052] S4: After the construction of the chamber lining layer 9 is completed, the inner wall of the lining structure shall be leveled before installing the flexible sealing layer 1, and the floating slurry and impurities around the embedded sleeve and embedded bolt sleeve 10 shall be peeled off to ensure that the outer end surface of the embedded bolt sleeve 10 is flush with the inner wall of the chamber lining layer 9, and to ensure that the flexible sealing layer 1 is flat.

[0053] S5: When the flexible sealing layer 1 is laid, 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 .

[0054] S6: Pass the lining connection bolt 5 through the pressure strip connector 3 and the flexible sealing layer 1 and then screw it into the embedded bolt sleeve 10, so as to press and fix the flexible sealing layer 1 on the inner wall of the chamber lining layer 9, and install a detachable connecting metal pressure strip 4 between two adjacent pressure strip connectors 3.

[0055] S7: 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 connectors 3 in sequence to form "multi-point fixation". In order to strengthen the fixation of the flexible sealing layer 1 on the inner wall of the lining, especially to prevent the flexible sealing layer in the range of the chamber vault from drooping, a "strip fixing" method is added during this installation process, and two adjacent bead connectors 3 are installed with detachable metal bead 4. A metal bead 4 can be installed between every two bead connectors 3, and the metal bead 4 can be set in two directions of the axial direction and the circumferential direction of the chamber. The bead connector 3 and the metal bead 4 are connected by bolts and nuts 6. Different types of bead connectors 3 can be selected according to different connection directions and numbers of metal bead 4.

[0056] 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 sealed cavity. The flexible sealing layer 1 can be in a good fit with the chamber lining layer 9 as a whole during the gas storage operation period and under the standard atmospheric pressure state of maintenance. Finally, the bolt holes 13 and joints of the flexible sealing layer 1 are sealed to form a flexible sealing system that meets the sealing requirements. The mechanical installation method of bolts and other accessories can ensure that the flexible sealing layer is safely, durably and firmly fitted on the chamber lining layer 9, meeting the relevant requirements of the compressed air energy storage chamber.

[0057] Example 6

[0058] On the basis of Example 5, a leakage prevention method in the installation process of the flexible sealing layer of a high-pressure gas storage chamber is provided, and the steps are as follows: 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 completed. The drilled bolt holes 13 should be slightly smaller than the screw diameter of the lining connection bolts 5; because the flexible sealing layer 1 is elastic, the small bolt holes 13 can allow the screws to pass through the flexible sealing layer 1, and the rebound force makes them tighter.

[0059] S2: Apply elastic sealant 11 to the contact surface 12 between the flexible sealing layer 1 and the embedded bolt sleeve 10, and ensure that the elastic sealant 11 is applied continuously and completely, with the contact surface 12 of the sandwich layer being filled with evenly-distributed elastic sealant 11 as the principle. After the application is completed, the flexible sealing layer 1 is attached to the inner wall of the chamber lining layer 9.

[0060] S3: Finally, the lining connection bolts 5 are installed. Before installing the lining connection bolts 5, the elastic sealant 11 is applied on the inner circumference of the bolt hole 13 of the flexible sealing layer 1, and the elastic sealant 11 is applied continuously, completely and fully. Then the lining connection bolts 5 are screwed in, and 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. During the screwing process of the lining connection bolts 5, the state of the elastic sealant 11 between the inner wall of the flexible sealant bolt hole 13 and the lining connection bolts 5 should be observed, and the elastic sealant 11 should be filled in time as needed until the inner circumference of the lining connection bolts 5 and the conventional bolt holes 7 of the flexible sealing layer 1 are filled with the elastic sealant 11. For the air leakage path in the lining connection bolts 5 and the bolt holes 13 on the flexible sealing layer 1, the air leakage path is blocked with the elastic sealant 11.

[0061] 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, so that the adhesive layer 2 is used to block the air leakage path of the flexible sealing layer 1.

[0062] Among them, the adhesive layer 2 and the elastic sealant 11 ensure that the flexible sealing layer 1 is safely and firmly attached to the inner surface of the chamber lining layer 9, thereby establishing a sealed and protected high-pressure gas storage chamber system. The chamber is filled with compressed air, and 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" along the axis and circumferential direction 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 bolts 5 will be tighter, and the possible leakage gaps will be compressed and filled completely, so that the flexible sealing layer 1, the elastic sealant 11 and the lining connection bolts 5 are more closely attached, cutting off the path of air leakage and ensuring that no leakage occurs at this node. Under the action of expansion, the embedded bolt sleeve 10 of the flexible sealing layer 1 and the chamber lining layer 9 is also tighter, and the gap filled by the elastic sealant 11 is also compressed to be completely dense, so that the flexible sealing layer 1, the elastic sealant 11 and the chamber lining layer 9 are more closely fitted, and the air leakage path is cut off. By injecting air into the cave, the high-pressure gas storage environment squeezes the flexible sealing layer 1, improves the sealing performance of the lining connection bolts 5, bolt holes 13 and elastic sealant 11, and ensures that the sealing system assembled in the artificial chamber can meet the high-pressure storage standards of the artificial chamber and meet the compressed air storage requirements.

[0063] The present invention is used for the installation and fixation of the flexible sealing layer 1 in the artificial underground chamber for compressed air energy storage. Compared with the traditional steel lining seal or the overall airbag flexible seal to be adopted, the present invention is simpler to operate and more economical as a whole in terms of installation difficulty, material processing and production, etc., and greatly reduces the installation difficulty and installation period 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 high-pressure gas storage chamber investment for compressed air energy storage projects.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only 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 strip connecting piece (3) and a metal strip (4), wherein the strip connecting piece (3) and the metal strip (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 connecting bolt (5) threadedly connected thereto, wherein the flexible sealing layer (1) and the strip connecting piece (3) are fixed to the chamber lining layer (9) by means of the lining connecting bolt (5) and the embedded bolt sleeve (10), and the staggered ends of the strip connecting piece (3) and the metal strip (4) are detachably connected by means of bolts and nuts (6).

2. The flexible sealing layer structure of the high-pressure gas storage chamber according to claim 1 is characterized in that: Bolt holes (13) corresponding to the lining connection bolts (5) are provided on the surface of the flexible sealing layer (1), and air leakage paths (14) are formed between the flexible sealing layer (1) and the embedded bolt sleeves (10), the lining connection bolts (5), and the layering connectors (3). A contact surface (12) is formed between the flexible sealing layer (1), the embedded bolt sleeves (10), and the bolt holes (13), and the contact surface (12) is filled with elastic sealant (11).

3. The flexible sealing layer structure of the high-pressure gas storage chamber according to claim 1 is characterized in that: A conventional bolt hole (7) is provided in the middle of the beading connector (3), and 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 a beading connector type A (3-1), a beading connector type B (3-2) and a beading connector type C (3-3). The beading connector type A (3-1) is straight plate-shaped when viewed from the front, and has a bow-shaped cross section; the beading connector type B (3-2) 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 (3-3) 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.

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

5. The flexible sealing layer structure of the high-pressure gas storage chamber according to claim 4 is characterized in that: 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).

6. The flexible sealing layer structure of the high-pressure gas storage chamber according to any one of claims 1 to 5, characterized in that: The cross section of the flexible sealing layer (1) is in a ring shape, the head and tail ends of two adjacent flexible sealing layers (1) are relatively overlapped, and the overlapping parts of the flexible sealing layers (1) are bonded by means of an adhesive layer (2).

7. A high-pressure gas storage chamber flexible sealing layer installation process, characterized in that: Here are the steps: S1: Based on the profile and inner diameter of the inner wall of the cavern, the deadweight load of the flexible sealing layer (1), the metal strip (4) and the strip 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 strip (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 position and angle of the embedded bolt sleeves (10) should be accurately controlled, and the embedded bolt sleeves (10) are in a closed form 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 treated as long holes, suitable for docking and installation with the corresponding beading connector (3); S4: After the construction of the cavern lining layer (9) is completed, before installing the flexible sealing layer (1), the inner wall of the lining structure is first leveled, and the floating slurry and impurities around the embedded sleeve and embedded bolt sleeve (10) are removed cleanly to ensure that the outer end surface of the embedded bolt sleeve (10) is flush with the inner wall of the cavern 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 bead connection piece (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 bead connection pieces (3); S7: The metal strip (4) is arranged in two directions, axially and circumferentially, 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) are selected according to different connection directions and numbers of 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.

8. The anti-leakage method in the installation process of the flexible sealing layer of a high-pressure gas storage chamber according to claim 7 is characterized in that: Here are the steps: S1: During the laying process of the flexible sealing layer (1), the embedded bolt sleeve (10) and the corresponding bolt hole (13) on the inner wall of the flexible sealing layer (1) are drilled. The drilled bolt hole (13) should be slightly smaller than the screw diameter of the lining connection bolt (5); S2: Applying elastic sealant (11) to the contact surface (12) between the flexible sealing layer (1) and the embedded bolt sleeve (10), so 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), so that the elastic sealant (11) is applied continuously, completely and fully. Then, the lining connection bolts (5) are screwed in, so that 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.

9. A mounting frame in a flexible sealing layer installation process, using the flexible sealing layer installation process described in claim 7, 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 ring-shaped telescopic support foot (18) is arranged 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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