Flexible sealing system of high-pressure gas storage chamber and construction method of flexible sealing system

Abstract

The invention provides a flexible sealing system of a high-pressure gas storage chamber and a construction method thereof.The flexible sealing system comprises the chamber arranged in surrounding rock, a flexible sealing layer is laid on the inner wall of the chamber, and the flexible sealing layer is formed by splicing an upper sealing layer and a lower sealing layer in a framing and blocking mode; sealing glue is coated between the chamber lining and the flexible sealing layer, and optical fibers are laid between the chamber lining and the flexible sealing layer. A steel lining sealing layer is replaced by the flexible sealing layer, the flexible sealing layer is subjected to framing and blocking, a sealing cavity in the high-pressure gas storage chamber is constructed by means of mechanical equipment used in tunnel engineering according to a reasonable installation process, the installation difficulty of the sealing layer in the chamber is greatly lowered, the installation period of the sealing layer in the chamber is greatly shortened, and the construction efficiency is improved. The method has the remarkable advantages in the aspects of construction feasibility, economical efficiency and the like.

Description

Technical Field

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

[0002] Compressed air energy storage technology, as a currently highly respected physical energy storage method in China, has demonstrated significant superiority. This technology not only does not emit harmful substances from the combustion of chemical fuels, thus protecting the environment, but its large capacity and long-term storage capacity can also increase the power generation and peak load of the power grid, and solve the intermittent problem of renewable energy generation. Among them, the chamber sealing layer of compressed air energy storage 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 operate safely and stably under high pressure, effectively prevent energy waste and environmental pollution, and improve the economic benefits and environmental protection effects of the gas storage chamber.

[0003] At present, steel lining is mainly used as the sealing layer in artificial caverns, but the steel lining has the disadvantages of heavy weight, inconvenient transportation, great construction difficulty, long construction period, poor overall economy, and poor corrosion resistance. Therefore, in order to solve the above-mentioned shortcomings of the steel lining sealing layer, many studies and discussions have been conducted on the sealing layer scheme in the cavern. One of the mainstream sealing schemes is to use a flexible sealing layer as the sealing layer in the pressure storage cavern. The flexible sealing layer adopts the form of an integral airbag, which is the most sealing performance guaranteed scheme. However, the production and installation of the integral airbag has obvious disadvantages: due to the large scale of artificial caverns, it is already very difficult to manufacture the large-volume flexible sealing layer airbag. The huge volume not only greatly increases the difficulty of transportation, but also places extremely high requirements on the operation during the installation process. The steps of handling, positioning and fixing 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 in a high-pressure gas storage chamber which is convenient to transport, simple to assemble and has high working efficiency and a construction method thereof. In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention discloses a flexible sealing system for a high-pressure gas storage chamber, comprising a chamber lining arranged in a surrounding rock, wherein a flexible sealing layer is laid on the inner wall of the chamber lining, and the flexible sealing layer is composed of an upper sealing layer and a lower sealing layer spliced ​​in sections and blocks, and sealing glue is applied and an optical fiber is laid between the chamber lining and the flexible sealing layer, and the optical fiber is used to detect gas leakage.

[0006] By adopting the above technical scheme, giving priority to the use of mechanical equipment used in tunnel engineering, and following a reasonable installation process, the construction of a sealed cavity in a high-pressure gas storage chamber is realized. Compared with traditional steel lining sealing schemes or integral flexible sealing schemes, the installation difficulty and installation period of the flexible sealing layer in the chamber are reduced by dividing the sections and blocks. It has significant advantages in terms of construction feasibility and economy, and can also monitor the leakage of the sealing system in a timely manner.

[0007] As a preferred technical solution of the present invention, an embedded sleeve is embedded in the inner wall of the chamber lining, and a through hole is provided in the flexible sealing layer corresponding to the position of the embedded sleeve. The flexible sealing layer is fixed to the chamber lining through the embedded sleeve and the corresponding bolts.

[0008] By adopting the above technical solution, the advantage lies in 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.

[0009] As a preferred technical solution of the present invention, the contact surface between the flexible sealing layer and the screw rod of the bolt is coated with elastic sealant, and the contact surface between the flexible sealing layer and the embedded sleeve is coated with elastic sealant.

[0010] By adopting the above technical solution, the advantage is that the sealing performance of the flexible sealing system in the high gas storage chamber is improved.

[0011] As a preferred technical solution of the present invention, the gaps at the joints of adjacent flexible sealing layers are filled with caulking agent, and the joints on the surfaces of the flexible sealing layers are adhered with sealing strips by means of sealing glue.

[0012] By adopting the above technical solution, the advantage is that the sealing strip covers the joint, thereby avoiding the problem of insufficient sealing of caulking agent and sealing glue as filling medium.

[0013] As a preferred technical solution of the present invention, the flexible sealing layer is fixed to the inner wall of the chamber lining by bolts, or the sealing strip and the flexible sealing layer are fixed to the inner wall of the chamber lining by bolts.

[0014] As a preferred technical solution of the present invention, a gasket is sleeved between the bolt and the flexible sealing layer.

[0015] By adopting the above technical solution, the friction and stability between the bolt and the flexible sealing layer are improved, and the flexible sealing layer can also be protected.

[0016] 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.

[0017] A method for constructing a flexible sealing system of a high-pressure gas storage chamber comprises the following steps: 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 six, when several sections of the upper sealing layer are installed in sequence and the installed upper sealing layer meets the safety distance along the axial length of the chamber, it is guaranteed that the working space for manual or small equipment and the safety distance of the upper sealing layer can be provided, and then the installation of the lower sealing layer can be started. It can be transported to the intended installation position by small transportation equipment, and the lower sealing layer can be spread and adjusted manually or with the help of auxiliary equipment and tools. Finally, manual installation is carried out, and sealing glue is applied between the lower sealing layer and the chamber lining to make the lower sealing layer fit to the inner wall of the chamber lining. Before the lower sealing layer is attached to the inner wall of the lining, a through hole is drilled at the position where the lower sealing layer is aligned with the embedded sleeve, and elastic sealant is applied around the through hole of the lower sealing layer and the contact surface between the lower sealing layer and the embedded sleeve. After the application is completed, the lower sealing layer is attached to the inner wall of the chamber lining, and then the bolts are screwed in to fix the lower sealing layer to the inner wall of the chamber lining, and the contact surface between the bolts and the lower sealing layer is filled with elastic sealant.

[0023] Step 7. During the laying process of each flexible sealing layer, five centimeters of sealing glue are brushed along the joint direction of the adjacent flexible sealing layers. The joints of the flexible sealing layers are also attached to the chamber lining. The gaps between the two flexible sealing layers are filled with caulking agent to fill the gaps densely.

[0024] Step 8. Stick a layer of sealing strip along the joint of the flexible sealing layer with sealing glue. The width of the sealing strip needs to ensure that the seam edges on both sides are not less than five centimeters.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. The flexible sealing system of the high-pressure gas storage chamber and the construction method thereof use a flexible sealing layer to replace the steel lining sealing layer, and the flexible sealing layer is divided into sections and blocks. With the help of simple mechanical equipment used in tunnel engineering, the sealing cavity in the high-pressure gas storage chamber is constructed according to a convenient installation process, which reduces the installation difficulty and installation period of the huge volume sealing layer in the chamber, and improves the feasibility and economy of the construction.

[0026] 2. The flexible sealing system of the high-pressure gas storage chamber and its construction method, the leakage blocking of the through holes and joints of the flexible sealing layer during the splicing and installation process, and the use of elastic sealants, sealing glue, caulking agents and sealing strips, etc., to achieve leakage blocking of the bolted joints and splicing seams of the flexible sealing layer, ultimately forming a complete and reliable underground chamber sealing system, even under extreme conditions such as high internal pressure and variable pressure, can also improve the stability of the flexible sealing layer during long-term operation.

[0027] 3. The flexible sealing system of the high-pressure gas storage chamber and its construction method, in order to address the risk of leakage at the 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 positions corresponding to the through holes and joints on the flexible sealing layer. This can more directly and effectively monitor the leakage of the sealing system and reduce the amount of engineering work for laying optical fibers, thereby improving the economic benefits of sealing monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 cross-sectional schematic diagram of the high-pressure gas storage chamber of the present invention; Figure 2 This is a schematic diagram of the assembly of the flexible sealing layer of the present invention; Figure 3 It is a schematic diagram of the layout of the flexible sealing layer of the present invention in sections and blocks; Figure 4 It is a schematic diagram of installing the sealing layer on the flexible sealing layer of the present invention; Figure 5 It is a schematic diagram of the installation of the lower sealing layer of the flexible sealing layer of the present invention; Figure 6 It is a schematic diagram of the construction of a leakage plugging node of a bolt hole of a flexible sealing layer according to the present invention; Figure 7 It is a schematic diagram of the leakage blocking node structure at the joint seam of the flexible sealing layer of the present invention; Figure 8 A three-dimensional schematic diagram of the optical fiber layout of the present invention; Fig. 9 It is a schematic diagram of the optical fiber layout expansion diagram of the present invention; Fig.10 It is a schematic diagram of the positions of the bolts and joints of the flexible sealing layer of the present invention.

[0029] In the figure: 1. surrounding rock; 2. chamber lining; 3. flexible sealing layer; 31. upper sealing layer; 32. lower sealing layer; 4. embedded sleeve; 41. bolt; 42. gasket; 5. caulk; 51. sealing strip; 6. elastic sealant; 7. sealing glue; 8. optical fiber; 81. axial joint of sealing layer; 82. circumferential joint of sealing layer. DETAILED DESCRIPTION

[0030] 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.

[0031] Example 1 like Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig. 9 As shown, the present invention provides a flexible sealing system for a high-pressure gas storage chamber, including a chamber lining 2 arranged in a surrounding rock 1, 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. The sections are axially divided and circumferentially divided into blocks along the chamber, and the circumferential length of the upper sealing layer 31 is greater than the circumferential length of the lower sealing layer 32. The reasonable installation process of section-by-section and block-by-block splicing greatly reduces the transportation difficulty and installation difficulty of the flexible sealing layer 3 in the chamber, shortens the installation period, and improves the feasibility and economy of the construction.

[0032] like Figure 8 and Fig. 9 As shown, sealing glue 7 and optical fiber 8 are applied between the chamber lining 2 and the flexible sealing layer 3. The flexible sealing layer 3 is fitted and installed on the inner wall of the chamber lining 2 by the sealing glue 7. The optical fiber 8 is arranged around the through hole of the flexible sealing layer 3, the axial seam 81 of the sealing layer, and the circumferential seam 82 of the sealing layer. Since leakage of the flexible sealing layer 3 is relatively easy to occur at the spliced ​​joints and bolt holes, the arrangement of the optical fiber 8 can optimize the accuracy of the leakage monitoring results.

[0033] Example 2 Embodiment 2 is based on embodiment 1, as Figure 6 As shown, the inner wall of the chamber lining 2 is embedded with an embedded sleeve 4, and the flexible sealing layer 3 is provided with a through hole corresponding to the position of the embedded sleeve 4, and the flexible sealing layer 3 is fixed to the chamber lining 2 through the embedded sleeve 4 and the corresponding bolts 41. The flexible sealing layer 3 is fixed to the chamber lining 2 by threaded connection, and the flexible sealing layer 3 is not easy to fall off and can maintain stable performance during long-term operation.

[0034] A washer 42 is sleeved between the bolt 41 and the flexible sealing layer 3 to increase the friction and stability between the bolt 41 and the flexible sealing layer 3 , disperse the concentrated force on the flexible sealing layer 3 , and protect the flexible sealing layer 3 .

[0035] Example 3 Embodiment 3 is based on Embodiment 2, the contact surface between the flexible sealing layer 3 and the screw of the bolt 41 is coated with an elastic sealant 6, and the contact surface between the flexible sealing layer 3 and the embedded sleeve 4 is coated with an elastic sealant 6, which is used to improve the sealing performance of the flexible sealing system in the high-pressure gas storage chamber. Figure 7 As shown, the gaps at the joints between adjacent flexible sealing layers 3 are filled with caulking agent 5, and the joints on the surface of the flexible sealing layer 3 are affixed with sealing strips 51 through sealing glue 7, which are used to cover the caulking agent 5, avoiding the problem of insufficient sealing of the caulking agent 5 and sealing glue 7 as filling media, thereby ensuring that the joints of the flexible sealing layer achieve good sealing by externally affixing the sealing strips. The position of the bolts 41 and the embedded sleeve 4 can be 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 strips 51 and the flexible sealing layer 3 to the inner wall of the chamber lining 2.

[0036] It is worth noting that the elastic sealant 6 used is a colloid, which has the function of filling gaps and sealing, and is used as a leakage prevention measure at the fixing place of the bolt 41 of the flexible sealing layer 3. The sealing glue 7 is liquid, which mainly plays a bonding and sealing role, and is used as a leakage prevention measure at the fitting and fixing place of the flexible sealing layer 3 and the joint. The caulking agent 5 and the sealing strip 51 are mainly used as leakage prevention measures at the joint gap. The caulking agent 5 can be made of polyurea, which meets the requirements of high strength and high elasticity, and effectively prevents being flattened by high internal air pressure to affect the sealing effect.

[0037] The leakage plugging of the through holes and joints of the flexible sealing layer 3 is achieved by using elastic sealant 6, sealing glue 7, caulking agent 5 and sealing strip 51, so as to achieve the leakage plugging of the bolt 41 connection and the joint seam of the flexible sealing layer 3, and the caulking agent 5, elastic sealant 6 and sealing glue 7 can fully squeeze and fill the gap with the help of the air pressure in the cavern, effectively avoiding air leakage. After the flexible sealing layer 3 is assembled in the cavern lining 2, the leakage path of the bolt 41 and the joint of the flexible sealing layer 3 is effectively isolated, and finally a complete and reliable underground cavern sealing system is formed, which can improve the stability of the flexible sealing layer in the long-term operation process even under extreme conditions such as high internal pressure and variable pressure.

[0038] The chamber lining 2 and the flexible sealing layer 3 are fixed together by threaded connection of bolts 41 and embedded sleeves 4, ensuring that the flexible sealing layer 3 maintains stability and durability during long-term operation. The sealing glue 7 can assist the fitting of the flexible sealing layer 3 during the installation process.

[0039] The optical fiber 8 is mainly laid around the through holes and joints of the flexible sealing layer 3. When high-pressure gas leaks from the flexible sealing layer 3, the high-temperature gas will cause the temperature of the optical fiber 8 near the leak point to become abnormal, so it can be used to determine whether there is leakage in the flexible sealing layer 3. The overall arrangement of the optical fiber 8 is divided into two upstream and downstream paths, which are laid along the lossless paths around the joints of the upper sealing layer 31 and the lower sealing layer 32, respectively, to form multiple S-shaped paths, ensuring that only one optical fiber 8 passes around each through hole, each flexible sealing layer axial joint 81, and each sealing layer circumferential joint 82. By comparing the length of the optical fiber 8 arranged in the upper sealing layer 31 and the lower sealing layer 32 with the length of the high-pressure gas storage chamber, the leakage position of the chamber can be determined later by the relative relationship between the length of the optical fiber 8 at the abnormal temperature measurement position of the optical fiber 8 from the starting point and the length of the high-pressure gas storage chamber, and then the flexible sealing layer 3 can be repaired or replaced during the maintenance stage. The optical fiber laying method can reduce the engineering workload of laying the optical fiber 8 and facilitate the monitoring of the specific location of the leakage point, thereby improving the safety of the construction of the flexible sealing system.

[0040] The flexible sealing layer 3 is made of polymer materials such as rubber, because polymer materials have the characteristics of good sealing, toughness, light weight, low density, corrosion resistance, good insulation performance, etc., and also have low transportation and installation costs and easy installation characteristics. It can be applied to the installation and use of the flexible sealing layer 3 in the chamber. The sealing strip 51 also uses the same material as the flexible sealing layer 3.

[0041] Example 4 A method for constructing a flexible sealing system of a high-pressure gas storage chamber comprises the following steps: Step 1: Figure 1 , Figure 2 and Figure 3 As 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.

[0042] 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: The mass of the upper sealing layer m1=π*10*2*240 / 360*0.01*1.1=0.46t The mass of the lower sealing layer m2 = π*10*2*120 / 360*0.01*1.1 = 0.23t 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.

[0043] 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 Fig.10 As shown, the bolts 41 are intended to be arranged on the sealing strip 51 and the flexible sealing layer 3 and its gasket 42. According to the size and position of the sealing strip 54 preset on the joint seam of the flexible sealing layer 3, the positions of the two end points of the sealing strip 51 are determined, and the positions, spacing and number of the bolts 41 for installation are determined. Each bolt 41 is located close to the end point of the sealing strip 51 to strengthen the stability of the sealing strip 51.

[0044] Step 2: According to the position, spacing and number of the bolts 41, the embedded sleeve 4 is embedded in the chamber lining 2 in advance for subsequent installation and fixation of the flexible sealing layer 3.

[0045] Step 3: The optical fiber 8 is pasted on the inner wall of the chamber lining 2 using a sealing glue 7, and the position of the joint between the flexible sealing layers 3 is determined according to the position of the embedded sleeve 4. Figure 8 , Fig. 9 As shown, the optical fiber 8 is laid along a lossless path around the joint seam of the flexible sealing layer 3. 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 should avoid the through hole of the embedded bolt 41 and the joint seam of the flexible sealing layer 3. The temperature sensitivity of the existing optical fiber 8 is used to monitor air leakage.

[0046] Step 4: Figure 4 and 6As shown, the installation of the flexible sealing layer 3 in the chamber lining 2 should try to use the existing equipment in tunnel engineering or other similar projects. For example, the waterproof board steel bar laying trolley used in the waterproof board paving of the mining method tunnel can make full use of the characteristics of the flexible sealing layer 3 similar to the waterproof board. The upper sealing layer 31 is rolled into a roll and installed on the installation shaft of the equipment. The installation shaft is set on the arc track of the equipment. Therefore, the rolled sealing layer on the equipment can move along the arc surface of the inner wall 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 adhered to the inner wall of the chamber lining 2 in a clockwise or counterclockwise direction using sealing glue 7.

[0047] Step five, apply sealing glue 7 between the upper sealing layer 31 and the chamber lining 2, so that the upper sealing layer 31 is attached to the inner wall of the chamber lining 2. Before the upper sealing layer 31 is attached to the inner wall of the lining 2, a through hole is punched in the upper sealing layer 31 at the position aligned with the embedded sleeve 4. The on-site operation can control the punching position and size according to the situation of the embedded sleeve 4 to improve the accuracy, and apply elastic sealant 6 around the through hole of the upper sealing layer 31 and the contact surface between the upper sealing layer 31 and the embedded sleeve 4 to ensure that the elastic sealant 6 is applied continuously and completely. After the application is completed, the upper sealing layer 31 is attached 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, and the contact surface between the bolts 41 and the upper sealing layer 31 is filled with elastic sealant 6.

[0048] Step 6: Figure 5 and 6 As shown, when several sections of the upper sealing layer 31 are installed in sequence, and the upper sealing layer 31 along the axial length of the chamber meets the working space required for the construction of the lower sealing layer 32 and the safety distance to the upper sealing layer 31, it is guaranteed that the working space for manual or small equipment and the safety distance of the upper sealing layer 31 can be provided, and then the installation of the lower sealing layer 32 begins. Since the volume of the lower sealing layer 32 is relatively small, it can be transported to the intended installation position by small transportation equipment, and the lower sealing layer 32 is spread out and adjusted in position by manual or auxiliary equipment and tools, and finally installed manually. The lower sealing layer 32 and the chamber lining are 2, and the sealing glue 7 is applied between the lower sealing layer 32 and the inner wall of the chamber lining. 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 the 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 to ensure that the elastic sealant 6 is applied continuously and completely. After the application is completed, the lower sealing layer 32 is attached to the inner wall of the chamber lining 2, and then the 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 the elastic sealant 6.

[0049] Step seven, 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. The joints of the flexible sealing layers are also attached to the chamber lining. The sealing glue 7 is applied to meet the requirements of continuity, completeness and moderate thickness, which is conducive to the edge of the flexible sealing layer 3 being attached to the inner wall of the chamber lining 2. There is a gap between the two flexible sealing layers 3 at the joint, and the gap is filled with filler 5 to fill the gap densely.

[0050] Step 8. A sealing strip 51 is attached along the joint of the flexible sealing layer 3. The width of the sealing strip 51 needs to satisfy the requirement that the seam edges on both sides are not less than five centimeters, so that the sealing strip 51 covers the sealant 5 at the joint. Because the sealing performance of the interface between the sealant 5 and the flexible sealing layer 3 may be insufficient, the sealing strip 51 is used to cover and block these possible leaking parts to improve the sealing performance.

[0051] 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.

[0052] 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 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) is applied and an optical fiber (8) is laid between the chamber lining (2) and the flexible sealing layer (3).

2. The flexible sealing system according to claim 1, characterized in that: An embedded sleeve (4) is embedded in the inner wall of the chamber lining (2); a through hole is provided in the flexible sealing layer (3) at a position corresponding to the embedded sleeve (4); and the flexible sealing layer (3) is fixed to the chamber lining (2) via the embedded sleeve (4) and respective corresponding bolts (41).

3. The flexible sealing system according to claim 2, characterized in that: The contact surface between the flexible sealing layer (3) and the screw rod of the bolt (41) is coated with elastic sealing glue (6), and the contact surface between the flexible sealing layer (3) and the embedded sleeve (4) is also coated with elastic sealing glue (6).

4. The flexible sealing system according to claim 3, characterized in that: The gaps at the joints of adjacent flexible sealing layers (3) are filled with a sealant (5), and the joints on the surfaces of the flexible sealing layers (3) are affixed with sealing strips (51) via a sealing glue (7).

5. The flexible sealing system according to claim 3 or 4, 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).

6. The flexible sealing system according to claim 5, characterized in that: A gasket (42) is sleeved between the bolt (41) and the flexible sealing layer (3).

7. The flexible sealing system according to claim 2, 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.

8. 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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