A flexible sealing system for a high-pressure gas storage chamber and a construction method thereof

Abstract

The present invention provides a flexible sealing system for a high-pressure gas storage chamber and a construction method thereof, including a chamber arranged in surrounding rock, a flexible sealing layer is laid on the inner wall of the chamber, the flexible seal is composed of upper and lower sealing layers spliced in sections and blocks, and a sealing glue is applied and optical fibers are laid between the chamber lining and the flexible sealing layer. The flexible sealing layer is used to replace the steel lining sealing layer, and the flexible sealing layer is divided into sections and blocks. With the help of mechanical equipment used in tunnel engineering and according to a reasonable installation process, the construction of a sealed cavity in the high-pressure gas storage chamber is realized, greatly reducing the installation difficulty and installation period of the sealing layer in the chamber, and having remarkable advantages in terms of construction feasibility and economy.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and particularly to a flexible sealing system for a high-pressure gas storage chamber and a construction method thereof. Background Art

[0002] Compressed air energy storage technology, as a highly regarded physical energy storage method in China at present, exhibits remarkable advantages. This technology not only does not emit harmful substances from the combustion of chemical fuels, protecting the environment, but also its large-capacity and long-term storage capabilities can improve the power generation and load regulation of the power grid, and solve the intermittency problem of renewable energy power generation. Among them, the sealing layer of the compressed air energy storage chamber is a key part to ensure the safe and efficient operation of gas storage. The main function of the sealing layer is to prevent gas leakage, ensure that the gas storage chamber can work safely and stably under high-pressure conditions, effectively prevent energy waste and environmental pollution, and improve the economic and environmental protection effects of the gas storage chamber.

[0003] Currently, a steel lining is mainly used as the sealing layer in artificial chambers, but the steel lining has disadvantages such as heavy self-weight, inconvenient transportation, large construction difficulty, long construction period, poor overall economy, and poor corrosion resistance. Therefore, to solve the above disadvantages of the steel lining sealing layer, many studies and discussions have been carried out on the sealing layer scheme in the chamber. One of the mainstream sealing schemes is to use a flexible sealing layer as the sealing layer in the compressed air storage chamber. The form of an integral airbag for the flexible sealing layer is the most reliable scheme for ensuring sealing performance. However, there are obvious disadvantages in the production and installation of the integral airbag: Since the scale of artificial chambers is usually large, it is already extremely difficult to manufacture a flexible sealing layer airbag with a huge volume. The huge volume not only greatly increases the transportation difficulty, but also has extremely high requirements for the operation during the installation process. Steps such as handling, positioning, and fixing of the huge airbag will become extremely complicated, bringing great challenges to the entire project.

[0004] Therefore, a flexible sealing system for a high-pressure gas storage chamber and a construction method thereof are proposed. 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 system for a high-pressure gas storage chamber and a construction method thereof, which are convenient for transportation, simple to assemble, and have high working efficiency. To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A flexible sealing system for a high-pressure gas storage chamber of the present invention includes a chamber lining provided in the surrounding rock. A flexible sealing layer is laid on the inner wall of the chamber lining. The flexible sealing layer is composed of an upper sealing layer and a lower sealing layer spliced in sections and blocks. A sealing glue is applied and an optical fiber is laid between the chamber lining and the flexible sealing layer. The optical fiber is used to detect gas leakage. The gaps at the joints of adjacent flexible sealing layers are filled with caulking agent, and a sealing strip is attached to the joints on the surface of the flexible sealing layer through the sealing glue.

[0007] By adopting the above technical solutions, with the help of mechanical equipment used in tunnel engineering and in accordance with a reasonable installation process, the construction of a sealed cavity in the high-pressure gas storage chamber is realized. Compared with the traditional steel lining sealing scheme or the integral flexible sealing scheme, the installation difficulty and installation period of the flexible sealing layer in the chamber are reduced by the method of sectioning and blocking, which has significant advantages in terms of construction feasibility and economy, and can also monitor the leakage of the sealing system in a timely manner. At the same time, the sealing strip covers the joints, avoiding the problem of insufficient sealing performance of the caulking agent and the sealing glue as filling media.

[0008] As a preferred technical solution of the present invention, embedded sleeves are buried in the inner wall of the chamber lining. Through holes are provided in the flexible sealing layer corresponding to the positions of the embedded sleeves. The flexible sealing layer is fixed to the chamber lining through the embedded sleeves and their corresponding bolts.

[0009] By adopting the above technical solutions, the advantage is that the fixed connection between the chamber lining and the flexible sealing layer is fixed by threaded connection, and the flexible sealing layer can ensure a stable sealed cavity in the chamber for a long time.

[0010] As a preferred technical solution of the present invention, elastic sealing glue is applied to the contact surface between the flexible sealing layer and the screw of the bolt, and elastic sealing glue is applied to the contact surface between the flexible sealing layer and the embedded sleeve.

[0011] By adopting the above technical solutions, the advantage is to improve the sealing performance of the flexible sealing system in the high-pressure gas storage chamber.

[0012] As a preferred technical solution of the present invention, the bolt fixes the flexible sealing layer to the inner wall of the chamber lining, or the bolt fixes the sealing strip and the flexible sealing layer to the inner wall of the chamber lining.

[0013] As a preferred technical solution of the present invention, a washer is sleeved between the bolt and the flexible sealing layer.

[0014] By adopting the above technical solutions, the advantage is to improve the friction and stability between the bolt and the flexible sealing layer, and at the same time, it can also protect the flexible sealing layer.

[0015] As a preferred technical solution of the present invention, the optical fiber is laid along a lossless path around the joint seam of the flexible sealing layer, close to the through hole of the flexible seal, the axial seam of the flexible sealing layer and the annular seam of the sealing layer.

[0016] A method for constructing a flexible sealing system of a high-pressure gas storage chamber comprises the following steps:

[0017] Step 1. Determine the size and number of the flexible sealing layer sections and blocks. The flexible sealing layer needs to be sectioned along the axial direction of the chamber lining, and divided into upper and lower blocks along the circumferential direction of the chamber lining, and divided into an upper sealing layer and a lower sealing layer. Under the condition of meeting the upper limit of the installation size and weight as much as possible, the section width and the circumferential size of the flexible sealing layer should be as large as possible. The size and weight of the upper sealing layer mainly consider whether it can meet the lifting capacity of the installation equipment. The size and weight of the lower sealing layer mainly consider whether it can meet the transportation needs of manual or small equipment for installing the lower sealing layer after the upper sealing layer is installed in the chamber lining, as well as the space required for the installation equipment to walk when installing the new upper sealing layer. At the same time, determine the position, spacing and number of bolts.

[0018] Step 2: According to the position, spacing and number of bolts, embed the embedded sleeve in the chamber lining in advance for the subsequent installation and fixation of the flexible sealing layer.

[0019] Step 3: Plan the position of the joints between the flexible sealing layers according to the position of the embedded sleeve, and then lay the optical fiber along the joints of the flexible sealing layers in a lossless path. The optical fiber laying position is close to the through holes of the flexible sealing layer, the axial joints of the sealing layer, and the circumferential joints of the sealing layer.

[0020] Step 4: The installation of the flexible sealing layer inside the chamber lining should try to use the existing equipment in tunnel engineering or other similar projects. The upper sealing layer should be rolled into a roll and installed on the installation shaft of the equipment. The installation shaft is set on the circular track of the equipment, so that the upper sealing layer can be gradually attached to the inner wall of the chamber lining in a clockwise or counterclockwise direction.

[0021] Step 5. Apply sealing glue between the upper sealing layer and the chamber lining to make the upper sealing layer fit to the inner wall of the chamber lining. Before the upper sealing layer is fitted to the inner wall of the lining, a through hole is drilled in the upper sealing layer to align with the embedded sleeve, and elastic sealant is applied around the through hole of the upper sealing layer and on the contact surface between the upper sealing layer and the embedded sleeve. After the coating is completed, the upper sealing layer is fitted to the inner wall of the chamber lining, and then the bolts are screwed in to fix the upper sealing layer to the inner wall of the chamber lining. The contact surface between the bolts and the upper sealing layer is filled with elastic sealant.

[0022] Step 6. When several installations of the upper sealing layer are completed in sequence and the axial length of the installed upper sealing layer in the chamber meets the safety distance, ensuring that the working space for manual or small equipment and the safety distance of the upper sealing layer can be provided, then start the installation of the lower sealing layer. It can be transported to the intended installation position by a small transportation device, and then spread and adjusted in position by manual labor or with the help of auxiliary equipment and tools. Finally, it is installed manually. Sealant glue is applied between the lower sealing layer and the chamber lining for the lower sealing layer to fit against the inner wall of the chamber lining. Before the lower sealing layer is fitted against the inner wall of the lining, through holes are drilled at the positions where the lower sealing layer aligns with the embedded sleeves, and elastic sealant glue is applied around the through holes of the lower sealing layer and in the contact surface range between the lower sealing layer and the embedded sleeves. After the application is completed, the lower sealing layer is fitted against the inner wall of the chamber lining, and then bolts are screwed in to fix the lower sealing layer to the inner wall of the chamber lining, with elastic sealant glue filling the contact surface between the bolts and the lower sealing layer.

[0023] Step 7. During the laying process of each flexible sealing layer, sealant glue is brushed along the joint direction for a length of 5 cm at the joints adjacent to the flexible sealing layer. The joints of the flexible sealing layer also fit against the chamber lining, and the gaps between the joints of the two flexible sealing layers are filled with caulking compound to densely fill the gaps.

[0024] Step 8. A sealing strip is externally attached along the joints of the flexible sealing layer with sealant glue, and the width of the sealing strip needs to meet the requirement that the two side edges extend outwards from the joint edges by no less than 5 cm.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. For the flexible sealing system of the high-pressure gas storage chamber and its construction method, the flexible sealing layer is used to replace the steel lining sealing layer, and the flexible sealing layer is divided into panels and blocks. With the help of simple mechanical equipment used in tunnel engineering and according to a convenient installation process, the construction of the sealed cavity in the high-pressure gas storage chamber is realized, reducing the installation difficulty and installation period of the large-volume sealing layer in the chamber and improving the feasibility and economy of construction.

[0027] 2. For the flexible sealing system of the high-pressure gas storage chamber and its construction method, the leakage blocking at the through holes and joints of the flexible sealing layer during the splicing and installation process is realized by using elastic sealant glue, sealant glue, caulking compound and sealing strips, etc., achieving the leakage blocking at the bolt connection parts and splicing joints of the flexible sealing layer, and finally forming a complete and reliable underground chamber sealing system. Even under extreme conditions such as high internal pressure and variable pressure, the stability of the flexible sealing layer during long-term operation can be improved.

[0028] 3. The flexible sealing system of the high-pressure gas storage chamber and its construction method. Aiming at the leakage risks existing at the splicing joints of the flexible sealing layer and the bolt holes in the flexible sealing layer, optical fibers are laid between the chamber lining and the flexible sealing layer, and the optical fibers are mainly laid at the positions corresponding to the through holes and splicing joints on the flexible sealing layer, which can more directly and effectively monitor the leakage of the sealing system and reduce the engineering quantity of optical fiber laying, thereby improving the economic benefits of sealing performance monitoring. Description of the Drawings

[0029] 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:

[0030] Figure 1 It is a schematic cross-sectional view of the high-pressure gas storage chamber of the present invention;

[0031] Figure 2 It is a schematic diagram of the segmented assembly of the flexible sealing layer of the present invention;

[0032] Figure 3 It is a schematic diagram of the layout of the flexible sealing layer in sections and segments of the present invention;

[0033] Figure 4 It is a schematic diagram of the installation of the upper sealing layer on the flexible sealing layer of the present invention;

[0034] Figure 5 It is a schematic diagram of the installation of the lower sealing layer on the flexible sealing layer of the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the leakage plugging node at the bolt hole of the flexible sealing layer of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the leakage plugging node at the splicing joint of the flexible sealing layer of the present invention;

[0037] Figure 8 It is a three-dimensional schematic diagram of the optical fiber layout of the present invention;

[0038] Figure 9 It is a developed view schematic diagram of the optical fiber layout of the present invention;

[0039] Figure 10 It is a schematic diagram of the positions at the bolts and splicing joints of the flexible sealing layer of the present invention.

[0040] In the figures: 1, surrounding rock; 2, chamber lining; 3, flexible sealing layer; 31, upper sealing layer; 32, lower sealing layer; 4, embedded sleeve; 41, bolt; 42, washer; 5, caulking agent; 51, sealing strip; 6, elastic sealant; 7, sealing glue; 8, optical fiber; 81, axial joint of the sealing layer; 82, circumferential joint of the sealing layer. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] Embodiment 1

[0043] As Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 shown, the present invention provides a flexible sealing system for a high-pressure gas storage chamber, including a chamber lining 2 arranged in the surrounding rock 1. A flexible sealing layer 3 is laid on the inner wall of the chamber lining 2. The flexible sealing layer 3 is composed of an upper sealing layer 31 and a lower sealing layer 32 spliced in sections and blocks. It is divided into sections along the axial direction of the chamber and into blocks in the circumferential direction. The circumferential length of the upper sealing layer 31 is greater than that of the lower sealing layer 32. Through a reasonable installation process of splicing in sections and blocks, the transportation difficulty and installation difficulty of the flexible sealing layer 3 in the chamber are greatly reduced, the installation period is shortened, and the feasibility and economy of construction are improved.

[0044] As Figure 8 and Figure 9 shown, a sealing glue 7 is applied and an optical fiber 8 is laid between the chamber lining 2 and the flexible sealing layer 3. The flexible sealing layer 3 is attached to the inner wall of the chamber lining 2 through the sealing glue 7. The optical fiber 8 is arranged around the through holes of the flexible sealing layer 3, the axial joints 81 of the sealing layer, and the circumferential joints 82 of the sealing layer. Since the leakage of the flexible sealing layer 3 relatively easily occurs at the splicing joints and bolt holes, the layout of the optical fiber 8 can optimize the accuracy of monitoring leakage results.

[0045] Embodiment 2

[0046] On the basis of Embodiment 1, as Figure 6 shown, embedded sleeves 4 are buried in the inner wall of the chamber lining 2. The flexible sealing layer 3 is provided with through holes corresponding to the positions of the embedded sleeves 4. The flexible sealing layer 3 is fixed to the chamber lining 2 through the embedded sleeves 4 and the corresponding bolts 41. The flexible sealing layer 3 is fixed to the chamber lining 2 through threaded connection. The flexible sealing layer 3 is not easy to fall off and can maintain stable performance during long-term operation.

[0047] A washer 42 is sleeved between the bolt 41 and the flexible sealing layer 3, which is used to increase the friction and stability between the bolt 41 and the flexible sealing layer 3, can disperse the concentrated force on the flexible sealing layer 3, and at the same time protect the flexible sealing layer 3.

[0048] Example 3

[0049] Based on Example 2, in Example 3, an elastic sealant 6 is applied to the contact surface between the flexible sealing layer 3 and the screw of the bolt 41, and the elastic sealant 6 is applied to the contact surfaces between the flexible sealing layer 3 and the embedded sleeve 4 to improve the sealing performance of the flexible sealing system in the high-pressure gas storage chamber. As Figure 7 shown, the gap at the splicing joint between adjacent flexible sealing layers 3 is filled with caulking compound 5, and a sealing strip 51 is attached to the joint on the surface of the flexible sealing layer 3 through sealing glue 7 to cover the caulking compound 5, avoiding the problem of insufficient sealing performance of the caulking compound 5 and the sealing glue 7 as filling media, thereby ensuring good sealing performance at the joints of the flexible sealing layer through externally attached sealing strips. The positions of the bolt 41 and the embedded sleeve 4 can be such that the bolt 41 fixes the flexible sealing layer 3 to the inner wall of the chamber lining 2, or the bolt 41 fixes the sealing strip 51 and the flexible sealing layer 3 to the inner wall of the chamber lining 2.

[0050] It should be noted that the elastic sealant 6 used is a paste, which has the functions of filling gaps and sealing, and is used for leak prevention measures at the fixing points of the flexible sealing layer 3 and the bolt 41. The sealing glue 7 is more liquid and mainly plays a bonding and sealing role, and is used for leak prevention measures at the fitting and joint positions of the flexible sealing layer 3. The caulking compound 5 and the sealing strip 51 are mainly used for leak prevention measures at the joints. The caulking compound 5 can be polyurea, which meets the requirements of high strength and high elasticity, and effectively prevents being flattened by high internal air pressure and affecting the sealing effect.

[0051] For the leakage plugging of the through holes and joints of the flexible sealing layer 3, by using the elastic sealant 6, the sealing glue 7, the caulking compound 5 and the sealing strip 51, the leakage plugging of the bolt 41 connection points and the splicing joints of the flexible sealing layer 3 is realized. Moreover, the caulking compound 5, the elastic sealant 6 and the sealing glue 7 can fully squeeze and fill the gaps under the action of the air pressure in the chamber, effectively avoiding air leakage. After the flexible sealing layer 3 is assembled in the chamber lining 2, the leakage paths of the bolt 41 and the joints of the flexible sealing layer 3 are effectively blocked, and finally a complete and reliable underground chamber sealing system is formed. Even under extreme conditions such as high internal pressure and variable pressure, the stability of the flexible sealing layer during long-term operation can be improved.

[0052] The chamber lining 2 and the flexible sealing layer 3 are fitted and fixed through the threaded connection of the bolt 41 and the embedded sleeve 4, ensuring the stability and durability of the flexible sealing layer 3 during long-term operation. The sealing glue 7 can assist the fitting of the flexible sealing layer 3 during the installation process.

[0053] The optical fiber 8 is mainly laid around the through holes and splicing seams on the flexible sealing layer 3. When high-pressure gas leaks from the flexible sealing layer 3, the high-temperature gas coming out will cause the temperature of the optical fiber 8 near the air leakage point to be abnormal. Therefore, it can be used to judge whether there is air leakage in the flexible sealing layer 3. The layout of the optical fiber 8 is divided into two parts: the upstream and the downstream, which are laid along the lossless paths around the splicing seams of the upper sealing layer 31 and the lower sealing layer 32 respectively, forming multiple S shapes, ensuring that there is only one optical fiber 8 passing through each through hole, each axial joint 81 of the flexible sealing layer and each circumferential joint 82 of the sealing layer. According to the comparison between the length of the optical fiber 8 arranged on the upper sealing layer 31 and the lower sealing layer 32 and the length of the high-pressure gas storage chamber, in the later stage, the air leakage position of the chamber can be determined by the relative relationship between the length of the optical fiber 8 from the starting point to the abnormal temperature measurement position of the optical fiber 8 and the length of the high-pressure gas storage chamber. Then, during the maintenance stage, the flexible sealing layer 3 can be repaired or replaced. The optical fiber laying method can reduce the engineering quantity of the optical fiber 8 laying and is convenient for monitoring the specific position of the leakage point, thus improving the safety of the construction of the flexible sealing system.

[0054] The flexible sealing layer 3 is made of polymer materials such as rubber. Because polymer materials have good sealing performance, toughness, light weight, low density, corrosion resistance, good insulation performance, etc., and also have lower transportation and installation costs and easy installation characteristics, they can be used for the installation and use of the flexible sealing layer 3 in the chamber. The sealing strip 51 is also made of the same material as the flexible sealing layer 3.

[0055] Example 4

[0056] A method for constructing a flexible sealing system for a high-pressure gas storage chamber includes the following steps:

[0057] Step 1: As Figure 1 、 Figure 2 and Figure 3As shown, the size and number of the sections and blocks of the flexible sealing layer 3 are determined. The flexible sealing layer 3 needs to be divided into multiple sections along the axial direction of the chamber lining 2, and divided into upper and lower sections along the circumferential direction, into an upper sealing layer 31 and a lower sealing layer 32. Under the condition of meeting the upper limit of the size and weight of the installation as much as possible, the section width and the circumferential size of the flexible sealing layer 3 should be as large as possible, and the number and length of the joints between the sections and blocks of the flexible sealing layer 3 should be reduced to reduce the construction error. The section width and block size of the flexible sealing layer 3 need to take into account the hoisting equipment when installing the upper sealing layer 31. The lifting size and lifting load capacity of the upper sealing layer 31 are mainly affected by the width. The size and weight of the upper sealing layer 31 are mainly considered to meet the lifting capacity of the installation equipment. The size and weight of the lower sealing layer 32 are mainly considered to meet the needs of operating space and safety distance for the transportation and installation of manual or small equipment for installing the lower sealing layer 32 after the upper sealing layer 31 is installed in the chamber lining 2, as well as the space required for the installation equipment to walk when installing the new upper sealing layer 31. Therefore, the arc length of the lower sealing layer 32 is affected by this space requirement.

[0058] When applied, the mass of the upper and lower blocks of the flexible sealing layer 3 can be calculated according to the diameter of the inner wall of the primary lining 2 of the chamber, the proportional relationship between the upper and lower blocks, and the width and thickness of the sealing layer. For example, for a high-pressure gas storage chamber with an inner diameter of 10m, the arc angle of the upper sealing layer 31 is 240°, the arc angle of the lower sealing layer 32 is 120°, the width of the flexible sealing layer 3 is 2m, the thickness is 1cm, and the density of the flexible sealing layer 3 material is about 1.1t / m3. It can be calculated as follows:

[0059] The mass of the upper sealing layer m1=π*10*2*240 / 360*0.01*1.1=0.46t

[0060] The mass of the lower sealing layer m2 = π*10*2*120 / 360*0.01*1.1 = 0.23t

[0061] In the application, it is necessary to reserve margin for cutting and trimming during on-site installation. Therefore, the length and width of the flexible sealing layer 3 should be appropriately increased during prefabrication. Accordingly, this dimension should be considered when calculating the required lifting and handling weight.

[0062] like Figure 6 As shown, the bolts 41 are intended to be arranged on the flexible sealing layer 3 and the gasket 42 thereof, and the installation position, spacing and number of the bolts 41 are reasonably determined, the installation spacing between the bolts 41 is increased as much as possible, and the number of the bolts 41 is reduced. The fewer the number of bolts, the lower the risk of leakage at the fixing point. Or as Figure 10As shown, bolts 41 are planned to be installed on the sealing strip 51, the flexible sealing layer 3 and its washer 42. According to the size and position of the sealing strip 54 preset on the splicing seam of the flexible sealing layer 3, the positions of the two endpoints of the sealing strip 51 are determined, and the installation position, spacing and quantity of the bolts 41 are determined. Each bolt 41 is positioned close to the endpoint of the sealing strip 51 to strengthen the stability of the sealing strip 51.

[0063] Step 2: According to the position, spacing and quantity of the bolts 41, embed the embedded sleeves 4 in the chamber lining 2 in advance for subsequent installation and fixation of the flexible sealing layer 3.

[0064] Step 3: The optical fiber 8 is pasted on the inner wall of the chamber lining 2 with the sealing glue 7, and the splicing seam position between the flexible sealing layers 3 is determined according to the position of the embedded sleeve 4. As Figure 8 , Figure 9 shown, the optical fiber 8 is wound and laid along the splicing seam of the flexible sealing layer 3 in a lossless path. The laying position of the optical fiber 8 is close to the through-hole position of the bolt 41, the axial joint 81 of the sealing layer and the circumferential joint 82 of the sealing layer, but it should avoid the through-hole of the embedded bolt 41 and the splicing seam of the flexible sealing layer 3, and use the temperature sensitivity of the existing optical fiber 8 for air leakage monitoring.

[0065] Step 4: As Figure 4 and 6 shown, the installation of the flexible sealing layer 3 in the chamber lining 2 should preferably use the equipment already available in tunnel engineering or other similar projects. For example, the waterproof board steel bar laying trolley used in the paving of the waterproof board in the mining method tunnel can make full use of the characteristics similar to the waterproof board of the flexible sealing layer 3. The upper sealing layer 31 is rolled into a roll and installed on the installation shaft of the equipment. The installation shaft is arranged on the arc track of the equipment. Therefore, the rolled sealing layer on the equipment can move along the inner wall arc surface of the chamber lining 2. The installation shaft is recommended to be 10 - 20 cm away from the installation position, so that the upper sealing layer 31 is gradually attached to the inner wall of the chamber lining 2 in a clockwise or counterclockwise direction with the sealing glue 7.

[0066] Step 5: Apply the sealing glue 7 between the upper sealing layer 31 and the chamber lining 2 for the upper sealing layer 31 to adhere to the inner wall of the chamber lining 2. Before the upper sealing layer 31 adheres to the inner wall of the lining 2, drill through-holes at the position where the upper sealing layer 31 aligns with the embedded sleeve 4. The on-site operation can control the drilling position and size according to the situation of the embedded sleeve 4 to improve the accuracy. And apply the elastic sealing glue 6 around the through-holes of the upper sealing layer 31 and the contact surface range between the upper sealing layer 31 and the embedded sleeve 4 to ensure that the elastic sealing glue 6 is applied continuously and completely. After the application is completed, attach the upper sealing layer 31 to the inner wall of the chamber lining 2, and then screw in the bolts 41 to fix the upper sealing layer 31 to the inner wall of the chamber lining 2. The contact surface between the bolt 41 and the upper sealing layer 31 is filled with the elastic sealing glue 6.

[0067] Step 6: AsFigure 5 and 6 As shown in 6 , when a number of upper sealing layers 31 are successively installed, and the axial length of the installed upper sealing layer 31 along the chamber meets the working space required for the construction of the lower sealing layer 32 and the safety distance from the upper sealing layer 31, ensuring that the working space for manual or small equipment and the safety distance from the upper sealing layer 31 can be provided, then the installation of the lower sealing layer 32 can be started. Since the volume of the lower sealing layer 32 is relatively small, it can be transported to the intended installation position by a small transport device, and then spread out and adjusted in position by manual labor or with the aid of auxiliary equipment and tools. Finally, it is manually installed. A sealing glue 7 is applied between the lower sealing layer 32 and the chamber lining 2 for the lower sealing layer 32 to fit against the inner wall of the chamber lining. Before the lower sealing layer 32 is fitted against the inner wall of the lining 2, through holes are drilled at positions where the lower sealing layer 32 aligns with the embedded sleeves 4, and elastic sealant 6 is applied to the periphery of the through holes of the lower sealing layer 32 and the contact surface range between the lower sealing layer 32 and the embedded sleeves 4, ensuring that the elastic sealant 6 is applied continuously and completely. After the application is completed, the lower sealing layer 32 is fitted against the inner wall of the chamber lining 2, and then bolts 41 are screwed in to fix the lower sealing layer 32 to the inner wall of the chamber lining 2, and the elastic sealant 6 fills the contact surface between the bolts 41 and the lower sealing layer 32.

[0068] Step Seven: During the laying process of each flexible sealing layer 3, a 5 - centimeter - wide sealing glue 7 is brushed along the joint direction at the joint of adjacent flexible sealing layers 3. The joint of the flexible sealing layer also fits against the chamber lining. The application of the sealing glue 7 meets the requirements of being continuous, complete, and of appropriate thickness, which is beneficial for the edge of the flexible sealing layer 3 to fit against the inner wall of the chamber lining 2. There is a gap at the joint of two flexible sealing layers 3, and the gap is filled with caulking agent 5 to densely fill the gap.

[0069] Step Eight: A sealing strip 51 is externally attached along the joint of the flexible sealing layer 3. The width of the sealing strip 51 needs to meet the requirement that the outer edges on both sides extend beyond the joint edge by no less than 5 centimeters, so that the sealing strip 51 covers the caulking agent 5 at the joint. Since the sealing performance at the interface between the caulking agent 5 and the flexible sealing layer 3 may be insufficient, the sealing strip 51 is used to cover and block these potentially leaky parts to improve the sealing performance.

[0070] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean 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 representations of the above - mentioned 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.

[0071] 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 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 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 flexible sealing system for a high-pressure gas storage chamber, comprising a chamber lining (2) disposed in a surrounding rock (1), characterized in that: A flexible sealing layer (3) is laid on the inner wall of the chamber lining (2), and the flexible sealing layer (3) is composed of an upper sealing layer (31) and a lower sealing layer (32) spliced ​​in sections and blocks. Sealing glue (7) and optical fiber (8) are applied between the chamber lining (2) and the flexible sealing layer (3). An embedded sleeve (4) is buried in the inner wall of the chamber lining (2), and a through hole is provided in the flexible sealing layer (3) corresponding to the position of the embedded sleeve (4). The flexible sealing layer (3) is provided with a through hole at a position corresponding to the embedded sleeve (4). The embedded sleeves (4) and their respective corresponding bolts (41) are fixed to the chamber lining (2); the contact surface between the flexible sealing layer (3) and the screw of the bolt (41) is coated with elastic sealant (6), and the contact surface between the flexible sealing layer (3) and the embedded sleeve (4) is coated with elastic sealant (6); the gaps at the joints of adjacent flexible sealing layers (3) are filled with caulking agent (5), and the joints on the surfaces of the flexible sealing layers (3) are bonded with sealing strips (51) via sealing glue (7).

2. The flexible sealing system according to claim 1, characterized in that: The bolts (41) fix the flexible sealing layer (3) to the inner wall of the chamber lining (2), or the bolts (41) fix the sealing strip (51) and the flexible sealing layer (3) to the inner wall of the chamber lining (2).

3. The flexible sealing system according to claim 2, characterized in that: A gasket (42) is sleeved between the bolt (41) and the flexible sealing layer (3).

4. The flexible sealing system according to claim 2 or 3, characterized in that: The optical fiber (8) is laid along a lossless path around the joint seam of the flexible sealing layer (3), and the optical fiber (8) is close to the through hole of the flexible sealing layer (3), the axial seam (81) of the flexible sealing layer, and the surrounding of the annular seam (82) of the sealing layer.

5. A method for constructing a flexible sealing system as claimed in claim 1, characterized in that: The steps include: Step 1: Determine the size and number of the sections and blocks of the flexible sealing layer (3). The flexible sealing layer (3) needs to be divided into multiple sections along the axial direction of the chamber lining (2), and divided into upper and lower blocks along the circumferential direction of the chamber lining (2), into an upper sealing layer (31) and a lower sealing layer (32). At the same time, determine the position, spacing and number of the bolts (41); Step 2: embedding the pre-embedded sleeve (4) in the chamber lining (2) in advance according to the position, spacing and number of the bolts (41); Step 3: The position of the joint seam between the flexible sealing layers (3) is planned according to the position of the embedded sleeve (4), and then the optical fiber (8) is laid along a lossless path around the joint seam of the flexible sealing layer (3), and the laying position of the optical fiber (8) is close to the through hole of the flexible sealing layer (3), the axial joint seam (81) of the sealing layer, and the circumferential joint seam (82) of the sealing layer; Step 4: Roll the upper sealing layer (31) into a roll and install it on the installation shaft of the equipment, the installation shaft is set on the arc track of the equipment, so that the upper sealing layer (31) is gradually attached to the inner wall of the chamber lining (2) in a clockwise or counterclockwise direction; Step 5: Apply sealing glue (7) between the upper sealing layer (31) and the chamber lining (2) to make the upper sealing layer (31) adhere to the inner wall of the chamber lining (2). Before the upper sealing layer (31) adheres to the inner wall of the lining (2), a through hole is punched in the upper sealing layer (31) so as to align with the embedded sleeve (4), and an elastic sealing glue (6) is applied around the through hole of the upper sealing layer (31) and on the contact surface between the upper sealing layer (31) and the embedded sleeve (4). After the application is completed, the upper sealing layer (31) is adhered to the inner wall of the chamber lining (2), and then the bolts (41) are screwed in to fix the upper sealing layer (31) to the inner wall of the chamber lining (2). The contact surface between the bolts (41) and the upper sealing layer (31) is filled with the elastic sealing glue (6). Step 6: When several sections of the upper sealing layer (31) are installed in sequence and the upper sealing layer (31) meets the safety distance along the axial length of the chamber, the working space for manual or small equipment and the safety distance of the upper sealing layer (31) are ensured, and then the installation of the lower sealing layer (32) is started, and it is ensured that it is transported to the intended installation position by small transportation equipment, and the lower sealing layer (32) is spread and adjusted in position for manual installation. The sealing glue (7) is applied between the lower sealing layer (32) and the chamber lining (2) to make the lower sealing layer (32) fit the chamber lining (2). Inner wall, before the lower sealing layer (32) is attached to the inner wall of the lining (2), a through hole is punched at the position where the lower sealing layer (32) is aligned with the embedded sleeve (4), and elastic sealant (6) is applied around the through hole of the lower sealing layer (32) and the contact surface between the lower sealing layer (32) and the embedded sleeve (4). After the application is completed, the lower sealing layer (32) is attached to the inner wall of the chamber lining (2), and then bolts (41) are screwed in to fix the lower sealing layer (32) to the inner wall of the chamber lining (2), and the contact surface between the bolts (41) and the lower sealing layer (32) is filled with elastic sealant (6); Step 7: During the laying process of each flexible sealing layer (3), five centimeters of sealing glue (7) are brushed along the joint direction of the adjacent flexible sealing layers (3), and the joints of the flexible sealing layers are also attached to the chamber lining, and the gaps between the two flexible sealing layers (3) are filled with caulking agent (5); Step 8: A sealing strip (51) is attached along the joint of the flexible sealing layer (3) using sealing glue (7).

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