Prefabricated lining structure of high-pressure gas storage

Abstract

The utility model discloses a prefabricated lining structure of a high-pressure gas storage in the technical field of underground energy storage, which comprises prefabricated lining segments and a movable caulking sliding block, the splicing end of each prefabricated lining segment is provided with a pinnacle along the length direction of the prefabricated lining segment, so that the splicing ends of two adjacent prefabricated lining segments form an X-shaped groove, and the movable caulking sliding block is arranged in the X-shaped groove. The movable joint filling sliding block is arranged between the two prefabricated lining segments, and the cross section of the movable joint filling sliding block is matched with the cross section of the X-shaped groove. The X-shaped grooves are formed in the splicing ends of the adjacent prefabricated lining segments, the X-shaped movable joint filling sliding blocks are arranged in the X-shaped grooves, the X-shaped grooves can be sealed through the movable joint filling sliding blocks regardless of internal pressure or external pressure, and when the prefabricated lining segments deform outwards or inwards due to the internal pressure and the external pressure, the movable joint filling sliding blocks can seal the X-shaped grooves. The movable caulking sliding blocks can slide outwards or inwards along with the prefabricated lining segments, it is ensured that the movable caulking sliding blocks can seal the adjacent prefabricated lining segments all the time, and therefore the sealing effect of the whole cavern lining is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground energy storage, in particular to a prefabricated lining structure of a high-pressure gas storage reservoir. Background Art

[0002] Energy storage technology is an important field that all countries are competing to develop. It has a special strategic position and is an important support for improving my country's energy structure. It has important research value. Among them, compressed air energy storage technology is regarded as another large-scale energy storage technology with great potential besides pumped storage, and it has broad development prospects. For compressed air energy storage in underground hard caverns, one of the research difficulties lies in the sealing of the underground caverns. Initially, steel plate lining was mostly used in the project, but the cost was high. For this reason, the industry proposed the idea of using lining structures for support and sealing, with the aim of achieving high-pressure gas sealing with reasonable economic investment. However, traditional tunnel lining structures are prone to cracking or deformation due to internal air pressure or external pressure water, leading to gas leakage. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the existing energy storage cavern lining, the technical problem to be solved by the present invention is to provide a prefabricated lining structure for a high-pressure gas storage reservoir that can ensure a sealing effect.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The prefabricated lining structure of the high-pressure gas storage reservoir includes prefabricated lining segments and a movable caulking slider. The spliced ends of the prefabricated lining segments are provided with spires along their length directions, so that the spliced ends of two adjacent prefabricated lining segments form an X-shaped groove. The movable caulking slider is arranged between the two prefabricated lining segments, and its cross-section is adapted to the cross-section of the X-shaped groove.

[0006] Furthermore, the prefabricated lining segments are reinforced concrete structures.

[0007] Furthermore, the elastic modulus of the caulking movable slider is smaller than the elastic modulus of the prefabricated lining segment.

[0008] Furthermore, the inner surface of the prefabricated lining segment is coated with an anti-seepage layer.

[0009] Furthermore, the outer surface of the prefabricated lining segment is provided with a mounting positioning hole which can be plugged and fixed with the hole wall mounting anchor rod.

[0010] Furthermore, the depth of the installation positioning hole is 1 / 3 to 1 / 2 of the thickness of the prefabricated lining segment.

[0011] The beneficial effects of the present invention are as follows: by arranging X-shaped grooves at the splicing ends of adjacent prefabricated lining segments and arranging X-shaped caulking movable sliders in the X-shaped grooves, the caulking movable sliders can seal the X-shaped grooves regardless of internal or external pressure, and when the prefabricated lining segments are deformed outward or inward due to internal and external pressures, the caulking movable sliders can slide outward or inward along with the prefabricated lining segments, ensuring that the caulking movable sliders can always seal the adjacent prefabricated lining segments, thereby improving the sealing effect of the entire cavern lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the utility model.

[0013] Marked in the figure are: 1-prefabricated lining segment, 2-removable slider for caulking, 3-anti-seepage layer, 4-anchor rod for installing the cave wall, 11-spike, 12-installation positioning hole. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] It should be noted that if directional terms are used in this utility model, such as "up," "down," "left," "right," "front," and "back," these are intended to facilitate the description of the relative positions of components and are not intended to specify the absolute positions of the related components or the positional relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. If terms related to quantity are used in this utility model, such as "multiple," "a plurality," or "several," these specifically refer to two or more.

[0016] like Figure 1 As shown, the utility model provides a prefabricated lining structure for a high-pressure gas storage reservoir, comprising a prefabricated lining segment 1 and a movable caulking slider 2. The spliced end of the prefabricated lining segment 1 is provided with a pointed top 11 along its length direction, so that the spliced ends of the two adjacent prefabricated lining segments 1 form an X-shaped groove. The movable caulking slider 2 is arranged between the two prefabricated lining segments 1, and its cross section is adapted to the cross section of the X-shaped groove. The pointed top 11 refers to a conical structure formed by chamfering the inner and outer sides of the end of the prefabricated lining segment 1. In this way, after the two prefabricated lining segments 1 are docked, a conical surface can be formed on both the inner and outer sides of the prefabricated lining segment 1. Regardless of whether the movable caulking slider 2 is moved outward by internal air pressure or moved inward by external water pressure, the splicing gap can be sealed by cooperating with the conical surface.

[0017] Among them, the prefabricated lining segment 1 is a reinforced concrete structure, and the specific size and strength are set according to the actual situation on site. The caulking movable slider 2 is preferably made of a material with an elastic modulus smaller than the elastic modulus of the prefabricated lining segment 1, such as ultra-high molecular weight polyethylene (UHMWPE), which has an elastic modulus of 0.69GPa, which is lower than the elastic modulus of concrete. This material has high strength and toughness, can meet the support and installation requirements of the prefabricated lining segment 1, and can also adapt to the deformation and extrusion of the prefabricated lining segment 1 to a certain extent. For parts that do not require excessive bearing strength, slightly softer materials such as polytetrafluoroethylene (PTFE) can also be used. In order to ensure the sealing effect, the tip 11 of the prefabricated lining segment 1 needs to be polished before laying the prefabricated lining segment 1, and a lubricant or sealing material can be applied to its surface to ensure that it fits tightly with the caulking movable slider 2 and can slide relative to it to improve the sealing effect.

[0018] Furthermore, to prevent internal air pressure from impacting the inner surface of the precast lining segment 1, an impermeable layer 3 may be applied to the inner surface of the precast lining segment 1. The impermeable layer 3 may be made of a flexible sealing material, such as polyurea waterproof material or epoxy resin waterproof coating, which not only enhances the sealing effect but also protects the concrete precast lining segment 1.

[0019] In addition, to facilitate the installation and fixation of the prefabricated lining segments 1, the outer surfaces of the prefabricated lining segments 1 are provided with mounting holes 12 for insertion and fixation with the tunnel wall mounting anchor rods 4. The tunnel wall mounting anchor rods 4 are pre-installed in the inner wall of the tunnel according to specific locations. During installation, the mounting holes 12 are first filled with concrete or sealant, and then aligned with the tunnel wall mounting anchor rods 4 for installation, fixation, and support. After a certain length of prefabricated lining segment 1 is installed, the gap between the prefabricated lining segment 1 and the inner wall of the tunnel is filled with grouting. To ensure reliable installation and the strength of the prefabricated lining segment 1, the depth of the mounting holes 12 is preferably 1 / 3 to 1 / 2 of the thickness of the prefabricated lining segment 1.

[0020] The utility model provides X-shaped grooves at the splicing ends of adjacent prefabricated lining segments 1, and provides X-shaped caulking movable sliders 2 in the X-shaped grooves for sealing. Regardless of whether it is subjected to internal pressure or external pressure, the caulking movable sliders 2 can seal the X-shaped grooves, and when the prefabricated lining segments 1 are deformed outward or inward due to internal and external pressures, the caulking movable sliders 2 can slide outward or inward with the prefabricated lining segments 1, ensuring that the caulking movable sliders can always seal the adjacent prefabricated lining segments, thereby improving the sealing effect of the entire cavern lining, and having good practicality and application prospects.

Claims

1. The prefabricated lining structure of the high-pressure gas storage is characterized by: The invention comprises a prefabricated lining segment (1) and a movable caulking slider (2); the spliced end of the prefabricated lining segment (1) is provided with a pointed top (11) along its length direction, so that the spliced ends of two adjacent prefabricated lining segments (1) form an X-shaped groove; the movable caulking slider (2) is arranged between the two prefabricated lining segments (1), and its cross section is adapted to the cross section of the X-shaped groove.

2. The prefabricated lining structure of a high-pressure gas storage reservoir according to claim 1, characterized in that: The prefabricated lining segment (1) is a reinforced concrete structure.

3. The prefabricated lining structure of a high-pressure gas storage reservoir according to claim 2, characterized in that: The elastic modulus of the caulking movable slider (2) is smaller than the elastic modulus of the prefabricated lining segment (1).

4. The prefabricated lining structure of a high-pressure gas storage reservoir according to claim 1, characterized in that: The inner surface of the prefabricated lining segment (1) is coated with an anti-seepage layer (3).

5. The prefabricated lining structure of a high-pressure gas storage reservoir according to claim 1, characterized in that: The outer surface of the prefabricated lining segment (1) is provided with a mounting positioning hole (12) that can be plugged and fixed with a cave wall mounting anchor rod (4).

6. The prefabricated lining structure of a high-pressure gas storage reservoir according to claim 5, characterized in that: The depth of the installation positioning hole (12) is 1 / 3 to 1 / 2 of the thickness of the prefabricated lining segment (1).

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