Composite sealing layer structure of compressed air energy storage artificial chamber gas storage

Abstract

The utility model provides a composite sealing layer structure of a compressed air energy storage artificial chamber gas storage, which solves the rigid-flexible coordination problem of the sealing layer structure through a flexible material and a thin steel lining structure, and effectively improves the coordination deformation capability between the sealing layer structure and a concrete lining. Rapid installation and high sealing performance are achieved through groove type steel plate pre-embedding and segmented installation sealing, the construction transportation and installation difficulty is greatly reduced, the construction period is shortened, and follow-up overhaul and maintenance are simple. The sealing layer structure gives consideration to performance, cost and construction convenience, and a better sealing solution is provided for the compressed air energy storage artificial chamber gas storage.

Description

Technical Field

[0001] This utility model belongs to the field of new energy technology and relates to a sealing layer structure for a gas storage facility. Background Technology

[0002] Compressed air energy storage is considered the most promising long-term and efficient energy storage method for the future. Selecting the type of gas storage facility is the first step in developing a compressed air energy storage power station project. Using artificial chambers as the gas storage facility is most beneficial for the development of compressed air energy storage projects and meets the needs of power energy storage. For artificial chamber gas storage facilities, the sealing layer structure serves the function of airtightness. Current sealing solutions primarily use materials such as steel linings, rubber, fiberglass, flexible concrete, and polymer coatings. While these materials all have the potential to form a sealing layer, they all have certain drawbacks. Because the sealing layer structure bears little or no stress, and due to differences in the elastic modulus of the materials, achieving good deformation coordination between the sealing layer and the lining requires reducing the thickness of the rigid sealing material or making it more flexible. However, the lower the thickness of the rigid sealing material, the more difficult it is to assemble the sealing layer, which is detrimental to construction. In the current construction projects, all artificial chamber gas storage facilities use steel linings as sealing layers. Steel linings as sealing layers require a large thickness, which significantly increases project costs. In addition, all steel linings are assembled by welding, resulting in long construction periods and the inability to guarantee weld quality. Utility Model Content

[0003] To address the problems mentioned in the background art, such as the difficulty in construction of rigid sealing materials, the high cost of steel lining as a sealing layer, the long construction period, and the inability to guarantee weld quality, this utility model proposes a composite sealing layer structure for a compressed air energy storage artificial chamber gas storage facility.

[0004] The composite sealing layer structure of this utility model is installed on the reinforced concrete lining of a gas storage tank. The reinforced concrete lining is constructed in sections, with a lining connection point between each two sections. A channel-shaped steel plate is pre-embedded at the lining connection point. The composite sealing layer is installed in sections according to the number of sections of the reinforced concrete lining. The end areas of two adjacent composite sealing layers are stacked and tightly attached to the inner wall of the channel-shaped steel plate to form a concave groove. Sealing material is poured into the concave groove. The non-end areas of the composite sealing layer are tightly attached to the corresponding reinforced concrete lining. The composite sealing layer includes flexible rubber and a thin steel lining disposed in the middle of the flexible rubber. The thin steel lining is disposed in the non-end areas of the composite sealing layer.

[0005] Furthermore, the channel steel plate includes a concave groove and steel plate wings disposed on both sides of the top of the concave groove. The outer wall of the concave groove fits into the interior of the lining connection, and the surface of the steel plate wings is flush with the inner surface of the reinforced concrete lining.

[0006] Furthermore, the thin steel liner in the composite sealing layer is provided with corrugated steel strips, which are distributed axially and have an axial length less than that of the flexible rubber. The axial corrugations on the thin steel liner further enhance the flexible deformation capability of the composite sealing layer material, while reducing material thickness, cost, and weight.

[0007] Furthermore, the non-end areas of the composite sealing layer are tightly bonded to the corresponding reinforced concrete lining via an adhesive layer. In two adjacent composite sealing layers, the flexible rubber at the end area of ​​one layer is heat-molded and tightly bonded to the inner wall of the channel steel plate, while the flexible rubber at the end area of ​​the other layer is heat-molded and bonded to the already bonded end of the composite sealing layer. The end areas of the composite sealing layer employ a heat-molding + bonding + sealing material sealing installation method, while the non-end areas use a sealing material installation method, simplifying the construction process and improving construction efficiency.

[0008] Furthermore, the composite sealing layer is a cylindrical composite sealing tube.

[0009] Furthermore, the adhesive layer between the composite sealing layer and the corresponding reinforced concrete lining is epoxy resin adhesive.

[0010] Furthermore, the sealing material is epoxy resin.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] (1) Performance optimization of composite sealing layer: The composite sealing layer combines the advantages of flexible rubber and thin steel lining. It retains the high sealing performance of steel lining and improves the deformation coordination ability through the elasticity of rubber. It has strong plasticity and good material sealing performance, which solves the problem of mismatch between rigid materials such as pure steel lining and concrete lining deformation.

[0013] (2) High construction efficiency: Through the design of pre-embedded grooved steel plates and segmented composite sealing layers, the composite sealing layer can be transported in a whole ring, reducing the amount of work involved in splicing sealing materials, realizing modular construction, and adopting a welding-free process, which can avoid weld quality problems, effectively improving the construction efficiency of the sealing layer and reducing the construction cycle.

[0014] (3) High structural stability: Each composite sealing layer is a self-contained system, which can effectively reduce the problem of gaps between the sealing layer and the lining under circulating air inflation, avoid the problem of the composite sealing layer collapsing as a whole due to its own weight, and enhance the self-stability of the structure; the sealing material poured on the outside of the composite sealing layer on the channel steel plate can make the overall structure more compact, and the hardened sealing material can also serve as a stiffening rib to improve the overall stability of the structure; in addition, the combination of flexible rubber and thin steel lining can better adapt to the radial, circumferential and axial stresses during the operation of the gas storage tank, reduce the gaps between the gas storage tank and the lining, improve the structural stability and durability, and extend the service life;

[0015] (4) Simple and convenient inspection and maintenance: The segmented structure of the composite sealing layer facilitates local repair and replacement, reduces maintenance costs, and makes inspection and maintenance simple and convenient;

[0016] (5) Low cost: The amount of thin steel lining used in the composite sealing layer is significantly reduced compared to the traditional thick steel lining, and the construction period is shortened, resulting in a significant decrease in overall cost.

[0017] In summary, this utility model solves the problem of rigidity-flexibility coordination in the sealing layer structure by using "flexible materials + thin steel lining structure," effectively improving the coordinated deformation capacity between the sealing layer structure and the concrete lining. Through "pre-embedded channel steel plates + segmented installation and sealing," it achieves rapid installation and high sealing performance, greatly reducing construction, transportation, and installation difficulties, shortening the construction cycle, and simplifying subsequent inspection and maintenance. The sealing layer structure of this utility model balances performance, cost, and construction convenience, providing a superior sealing solution for compressed air energy storage artificial chamber gas storage facilities. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the gas storage facility.

[0019] Figure 2 This is a structural schematic diagram of the steel channel embedded parts at the joint of the segmented lining.

[0020] Figure 3 This is a schematic diagram of the composite sealing layer.

[0021] Figure 4 This is a schematic diagram of the combination of the composite sealing layer and the lining structure.

[0022] Figure 5 A schematic diagram of epoxy resin casting for the groove.

[0023] Explanation of reference numerals in the attached drawings: 1-External surrounding rock; 2-Reinforced concrete lining; 3-Composite sealing layer; 4-Gas storage tunnel; 5-Connection between adjacent linings; 6-Channel steel plate; 7-Concave groove; 8-Steel plate wing; 9-Flexible rubber; 10-Thin steel lining; 11-Corrugated steel lining strip; 12-Sealing material. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application. The positional relationships described in the embodiments are consistent with those shown in the accompanying drawings.

[0025] Figure 1 This is a cross-sectional view of the compressed air energy storage artificial chamber gas storage facility. The overall cross-section of the structure is circular, and from the outside to the inside are: external surrounding rock 1, reinforced concrete lining 3, composite sealing layer 3, and gas storage tunnel 4.

[0026] like Figure 2 As shown, the reinforced concrete lining 2 is constructed in sections. A lining connection 5 is provided between each two sections of the reinforced concrete lining 2. A prefabricated channel steel plate 6 is embedded in the lining connection 5. Specifically, the channel steel plate 6 consists of a concave groove 7 and steel plate wings 8 set on both sides of the top of the concave groove 7. The outer wall of the concave groove 7 fits into the interior of the lining connection 5. The surface of the steel plate wings 8 is flush with the inner surface of the reinforced concrete lining 2. More specifically, in this embodiment, the depth of the concave groove 7 is about 20-30cm, and the length of the steel plate wings 8 is about 30-50cm.

[0027] Specifically, such as Figure 3 As shown, the composite sealing layer 3 consists of flexible rubber 9 and a thin steel liner 10 disposed in the middle of the flexible rubber 9. The thin steel liner 10 is disposed in the non-end area of ​​the composite sealing layer 3. More specifically, the thin steel liner 10 in the composite sealing layer 3 is provided with steel corrugated strips 11, which are distributed axially and have an axial length less than that of the flexible rubber 9. More specifically, the composite sealing layer 3 can be made into a composite sealing tube for easy transportation and assembly. In a single composite sealing tube, the length of the flexible rubber 9 is greater than the length of the thin steel liner 10 in the axial direction. The length of the flexible rubber 9 = the length of the flat section between two adjacent concave grooves 7 + the depth of the concave groove 7 + the width of the bottom surface of the concave groove 7. The length of the thin steel liner 10 = the length of the flat section between two adjacent concave grooves 7.

[0028] like Figure 4As shown, the composite sealing layer 3 is disposed on the reinforced concrete lining 2 of the gas storage tank. The composite sealing layer 3 is segmented according to the number of sections of the reinforced concrete lining 2. The non-end areas of the composite sealing layer 3 are tightly attached to the corresponding reinforced concrete lining 2. The end areas of two adjacent composite sealing layers 3 are stacked and tightly attached to the inner wall of the channel steel plate 6 to form a concave groove 7. More specifically, the non-end areas of the composite sealing layer 3 are tightly attached to the corresponding reinforced concrete lining 2 by an adhesive layer. In this embodiment, the adhesive layer is epoxy resin. In two adjacent composite sealing layers 3, the flexible rubber 9 at the end area of ​​one composite sealing layer 3 is tightly attached to the inner wall of the channel steel plate 6 by heating and shaping, and the flexible rubber 9 at the end area of ​​the other composite sealing layer 3 is bonded to the already attached end of the composite sealing layer 3 by heating and shaping. After the two flexible rubber 9 are tightly bonded together, a concave groove 7 is formed.

[0029] like Figure 5 As shown, a sealing material 12 is poured onto the concave groove 7 to further fix the composite sealing layer 3. In this embodiment, the sealing material 12 is epoxy resin. Pouring the sealing material 12 can make the overall structure more compact, and the hardened sealing material 12 can also act as a stiffening rib to improve the overall stability of the structure.

[0030] Composite sealing layer 2 is transported from the tunnel to the gas storage facility for assembly. To reduce subsequent assembly work, composite sealing layer 2 can be... Figure 2 The composite sealing pipe shown is used for whole-ring transportation. After the gas storage tank is excavated, the composite sealing layer 2 is constructed in sections. The next section is constructed in sequence only after the overall stability of each section is sufficient.

[0031] The construction and installation methods for the composite sealing layer structure of the compressed air energy storage artificial chamber gas storage facility described above are as follows:

[0032] 1. After the gas storage tank is excavated, the reinforced concrete lining 2 is constructed. The reinforced concrete lining 2 is constructed in sections. Precast channel steel plates 6 are embedded in the steel mesh of the reinforced concrete lining 2. The spacing of the channel steel plates 6 is set according to the maximum axial length of the entire section of the composite sealing pipe.

[0033] 2. The composite sealing layer 2 is manufactured in the factory. The thin steel lining 10 is located in the middle of the flexible rubber 9 and is set in the non-end area of ​​the composite sealing layer 3, forming a composite sealing pipe. After the reinforced concrete lining 2 is completed and meets the relevant requirements, the composite sealing pipe is transported in sections to the gas storage facility by rail transport vehicle or flatbed truck.

[0034] 3. Apply epoxy resin adhesive to the back of each section of reinforced concrete lining 2 and composite sealing pipe to ensure tight adhesion between the sealing material and the lining. To prevent the composite sealing pipe from collapsing due to its own weight, temporary supports need to be installed inside the gas storage tunnel 4 for fixation. Use a hot melt machine to shape the flexible rubber 9 at the end of the composite sealing pipe. One section of the flexible rubber 9 at the end of the composite sealing pipe is heated and shaped to be tightly adhered to the inner wall of the channel steel plate 6, while the other section of the flexible rubber 9 at the end of the composite sealing pipe is bonded to the end of the already adhered composite sealing layer 3, forming a concave groove 7.

[0035] 4. After the two sections of flexible rubber 9 in the concave groove 7 are tightly bonded into a whole, epoxy resin is poured into the concave groove 7 to further fix the composite sealing tube.

[0036] 5. Repeat the above steps until the composite sealing pipe is installed.

[0037] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings and specific examples. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A composite sealing layer structure for a compressed air energy storage artificial chamber gas storage facility, disposed on the reinforced concrete lining (2) of the gas storage facility, characterized in that: The reinforced concrete lining (2) is constructed in sections. A lining connection (5) is provided between each two sections of the reinforced concrete lining (2). A channel steel plate (6) is embedded in the lining connection (5). The composite sealing layer (3) is set in sections according to the number of sections of the reinforced concrete lining (2). The end areas of two adjacent composite sealing layers (3) are stacked and closely attached to the inner wall of the channel steel plate (6) to form a concave groove (7). A sealing material (12) is poured on the concave groove (7). The non-end areas of the composite sealing layer (3) are closely attached to the corresponding reinforced concrete lining (2). The composite sealing layer (3) includes a flexible rubber (9) and a thin steel liner (10) disposed in the middle of the flexible rubber (9), wherein the thin steel liner (10) is disposed in the non-end region of the composite sealing layer (3).

2. The composite sealing layer structure of the compressed air energy storage artificial chamber gas storage tank according to claim 1, characterized in that: The channel steel plate (6) includes a concave groove (7) and steel plate wings (8) set on both sides of the top of the concave groove (7). The outer wall of the concave groove (7) is fitted with the interior of the lining connection (5), and the surface of the steel plate wings (8) is flush with the inner surface of the reinforced concrete lining (2).

3. The composite sealing layer structure of the compressed air energy storage artificial chamber gas storage tank according to claim 2, characterized in that: The thin steel lining (10) in the composite sealing layer (3) is provided with steel lining corrugated strips (11), which are distributed along the axial direction and the axial length of the steel lining corrugated strips (11) is less than that of the flexible rubber (9).

4. The composite sealing layer structure of a compressed air energy storage artificial chamber gas storage facility according to any one of claims 1-3, characterized in that: The non-end area of ​​the composite sealing layer (3) is tightly bonded to the corresponding reinforced concrete lining (2) through the adhesive layer; in the two adjacent composite sealing layers (3), the flexible rubber (9) of the end area of ​​one composite sealing layer (3) is tightly bonded to the inner wall of the channel steel plate (6) by heating and shaping, and the flexible rubber (9) of the end area of ​​the other composite sealing layer (3) is bonded to the end of the bonded composite sealing layer (3) by heating and shaping.

5. The composite sealing layer structure of the compressed air energy storage artificial chamber gas storage tank according to claim 4, characterized in that: The composite sealing layer (3) is a cylindrical composite sealing tube.

6. The composite sealing layer structure of the compressed air energy storage artificial chamber gas storage tank according to claim 4, characterized in that: The adhesive layer between the composite sealing layer (3) and the corresponding reinforced concrete lining (2) is epoxy resin adhesive.

7. The composite sealing layer structure of the compressed air energy storage artificial chamber gas storage tank according to claim 1, characterized in that: The sealing material (12) is epoxy resin.

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