A thermal corner protection structure, a film enclosure system and a film enclosure construction process

Abstract

This application relates to a thermal corner protection structure, a thin-film enclosure system and a thin-film enclosure construction process. It includes an upper thermal insulation module, a lower thermal insulation module, embedded parts, secondary corrugated plates and skirt plates. The upper thermal insulation module and the lower thermal insulation module are arranged vertically on the inner wall of the outer tank, and there is a gap between them. The outer sides of the upper thermal insulation module and the lower thermal insulation module are covered with main corrugated plates. The embedded parts are fixed on the inner wall of the outer tank, and part of the embedded parts is located on the side of the gap close to the upper thermal insulation module. The secondary corrugated plates are arranged between the lower thermal insulation module and the main corrugated plates. The skirt plates are connected between the embedded parts and the secondary corrugated plates, and part of them is arranged on the side of the gap close to the upper thermal insulation module. The embedded parts, the skirt plates and the secondary corrugated plates are connected in sequence to separate the gap from the main corrugated plates, and the upper edge of the skirt plates is provided with second longitudinal corrugations. The thermal corner protection structure provided by this application can protect the gap position of the thin-film enclosure structure and reduce the possibility of leakage of the storage tank.

Description

Technical Field

[0001] The present application relates to the technical field of film enclosure systems, and in particular, to a thermal corner protection structure, a film enclosure system, and a film enclosure construction process. Background Art

[0002] Liquefied Natural Gas (LNG) storage tanks are the most common specialized equipment used in the storage and transportation of LNG. During construction, the tank body requires a multi-layered structure to achieve sealing and thermal insulation.

[0003] In existing technology, the layered structure of a liquefied natural gas storage tank can be divided into an outer tank structure and an inner membrane enclosure structure. The outer tank structure is usually cast in concrete, while the inner membrane enclosure structure usually consists of a shielding layer and an insulation layer to achieve a sealing and thermal insulation effect.

[0004] In existing technology, membrane enclosures are constructed by dividing the structure into two sections, five meters from the tank bottom. Due to the different pressure and temperature environments experienced by the two sections, the structures of the two sections must be differentiated. This can lead to gaps at the junction of the two sections due to different assembly methods and structures. If the outermost shielding layer is damaged, liquefied natural gas can leak through the gaps into the concrete exterior, causing damage to the outer tank and ultimately leading to a tank leak.

[0005] Therefore, it is urgent to provide a protective structure that can protect the gap between the upper and lower parts of the membrane enclosure structure, and reduce the possibility of material leaking from the gap to the outer tank when the shielding layer is damaged, causing tank leakage. Summary of the Invention

[0006] The purpose of this application is to provide a hot corner protection structure, a film enclosure system and a film enclosure construction process, which can protect the gap between the upper and lower parts of the film enclosure structure, and reduce the possibility of tank leakage caused by material leakage from the gap to the outer tank when the shielding layer is damaged.

[0007] In order to achieve the above-mentioned purpose, in the first aspect of the present application, the present application provides a thermal corner protection structure, which is arranged in the accommodating cavity formed by the outer tank. The thermal corner protection structure includes an upper insulation module and a lower insulation module, an embedded part, a secondary corrugated plate and a skirt plate. The upper insulation module and the lower insulation module are arranged on the inner wall of the outer tank in the vertical direction, and a gap is formed between the two. The outer sides of the upper insulation module and the lower insulation module are covered with a main corrugated plate. The embedded part is fixed to the inner wall of the outer tank, and the embedded part is partially located on the side of the gap close to the upper insulation module. The secondary corrugated plate is arranged between the lower insulation module and the main corrugated plate. The skirt plate is connected between the embedded part and the secondary corrugated plate, and is partially arranged on the side of the gap close to the upper insulation module. Among them, the embedded part, the skirt plate and the secondary corrugated plate are connected in sequence to separate the gap from the main corrugated plate, and a second longitudinal corrugation is arranged on the skirt plate along the extension direction.

[0008] Based on the above-mentioned embodiments of the present application, during the construction and assembly of the liquefied natural gas storage tank, the membrane enclosure structure is divided into an upper insulation module and a lower insulation module with a five-meter dividing line. The two are designed with different structures to cope with different pressure and temperature environments. In the present application, the outer side of the upper insulation module is only covered with a shielding structure of the main corrugated plate, while the position of the lower insulation module is provided with two shielding structures of the main corrugated plate and the secondary corrugated plate, thereby enhancing the shielding effect compared to the area above the gap, in order to cope with the higher sealing and insulation requirements of the bottom area of ​​the outer tank. In this process, the pre-embedded parts, skirt plates and secondary corrugated plates are connected in sequence to form a separation structure, which separates the gap and the main corrugated plate on different sides, thereby preventing the low-temperature material from flowing directly to the outer tank position through the gap, thereby reducing to a certain extent the possibility of the low-temperature material causing damage to the outer tank when the main corrugated plate leaks. Furthermore, when the embedded parts, skirt plate and secondary corrugated plate are connected, a second longitudinal corrugation is provided on the skirt plate while the skirt plate extends from the embedded parts to the secondary corrugated plate. This can improve the skirt plate's ability to cope with low-temperature deformation on the one hand, and strengthen the connection and sealing effect between the skirt plate and the secondary corrugated plate on the other hand. In summary, through the above-mentioned arrangement, while achieving targeted reinforcement of the bottom of the outer tank, a retaining structure is formed between the gap and the primary corrugated plate, preventing low-temperature materials from flowing directly into the outer tank through the gap when the primary corrugated plate leaks, thereby reducing the possibility of leakage in the liquefied natural gas storage tank and improving safety during use.

[0009] In some embodiments, an end cap is provided at an end of the second longitudinal corrugation close to the embedded part.

[0010] Based on the above-mentioned embodiments of the present application, the ends of the secondary longitudinal corrugations are sealed by forming end caps. This allows for deformation margins in the corrugations while ensuring a sealing effect at the skirt plate connection, thus preventing leakage of material stored in the tank from the skirt plate connection in the event of a leak in the primary corrugated plate.

[0011] In some embodiments, one end of the skirt panel extends to the embedded component and overlaps the portion of the embedded component located within the gap, and the secondary corrugated plate is connected to the other end of the skirt panel. Alternatively, one end of the skirt panel extends to the embedded component and overlaps the portion of the embedded component located within the gap, and the secondary corrugated plate is connected to the other end of the skirt panel, affixing the secondary corrugated plate to the skirt panel and extending toward the embedded component, overlapping the portion of the skirt panel located within the gap.

[0012] Based on the aforementioned embodiments of this application, in one embodiment, the skirt plate is connected between the embedded component and the secondary corrugated plate, thereby forming a containment structure that separates the gap from the primary corrugated plate. In another embodiment, the secondary corrugated plate extends toward the embedded component and overlaps with the skirt plate within the gap, thereby forming a double-layer containment structure, enhancing the sealing and connection between the two.

[0013] In some embodiments, the secondary corrugated plate is provided with first longitudinal corrugations, the extending direction of the first longitudinal corrugations is consistent with the second longitudinal corrugations, and the first longitudinal corrugations at least partially overlap with the second longitudinal corrugations.

[0014] Based on the aforementioned embodiments of the present application, the provision of first longitudinal corrugations on the secondary corrugated plate enhances the plate's resistance to low-temperature deformation. Furthermore, when the secondary corrugated plate is connected only to the skirt plate end, the first longitudinal corrugations overlap only with the ends of the second longitudinal corrugations. However, when the secondary corrugated plate extends toward the embedded component, the first longitudinal corrugations extend with the secondary corrugated plate and overlap with the portion of the second longitudinal corrugations within the gap.

[0015] In some embodiments, a filler is disposed in the second longitudinal corrugations, and the filler fills at least the portion of the second longitudinal corrugations located in the gap.

[0016] Based on the above-mentioned embodiment of the present application, the two ends of the gap portion are respectively connected to the inner wall of the outer tank and the main corrugated plate. Since it is necessary to maintain a low temperature environment in the storage tank, the temperature of the main corrugated plate is usually low, even reaching more than 160 degrees below zero, while the temperature of the outer tank is usually close to room temperature or slightly lower than room temperature. Therefore, due to the temperature difference, convection will occur in the gap and the second longitudinal corrugation, which will have a significant impact on the insulation effect of the gap position. Therefore, the second longitudinal corrugation is filled with a filler, especially the portion of the second longitudinal corrugation located in the gap, so as to avoid convection within the second longitudinal corrugation and thus improve the insulation effect of the gap area.

[0017] In some embodiments, the second longitudinal corrugations include a first corrugation segment and a second corrugation segment, wherein the first corrugation segment is arranged axially along the outer tank, and the second corrugation segment is arranged radially along the outer tank. The ends of the first and second corrugation segments adjacent to each other are each provided with mutually mating inclined surfaces, which fit together to connect the first and second corrugation segments and form an L-shaped structure. Alternatively, the second longitudinal corrugations further include a third corrugation segment, which is configured as an arcuate transition structure and is connected between the first and second corrugation segments to connect the first and second corrugation segments to form an L-shaped structure.

[0018] Based on the above-mentioned embodiments of the present application, two specific configurations of the second longitudinal corrugations are provided. In one configuration, the second longitudinal corrugations include a first corrugated segment and a second corrugated plate. By providing an inclined surface structure at the connecting end of the first and second corrugated segments, the first and second corrugated segments can be assembled to form an L-shaped first longitudinal corrugation, thereby matching the shape formed by the extension of the secondary corrugated plate. In this case, the connection between the first and second corrugated segments can be fixed by welding or other methods. In another configuration, a third corrugated segment with an arc-shaped transition is formed between the first and second corrugated segments. In this case, the first corrugated plate, the second and third corrugated segments can be formed as a whole, for example, by bending or other processing methods.

[0019] In some embodiments, the upper insulation module includes a first insulation layer disposed between the primary corrugated plate and the inner wall of the outer tank, above the gap. The lower insulation module includes a second insulation layer disposed between the secondary corrugated plate and the inner wall of the outer tank. A third insulation layer is also disposed between the secondary corrugated plate and the primary corrugated plate.

[0020] Based on the above-mentioned embodiments of the present application, a first insulation layer is provided for thermal insulation protection at the location of the upper insulation module. Simultaneously, a second insulation layer and a third insulation layer are stacked and provided at the location of the lower insulation module, thereby forming a double-layer insulation structure corresponding to a double-layer shielding structure, thereby improving the thermal insulation effect of the bottom area of ​​the storage tank.

[0021] According to a second aspect of the present application, a film enclosure system is provided, which includes an outer tank and the above-mentioned thermal corner protection structure, and the thermal corner protection structure is arranged in a receiving cavity formed by the outer tank.

[0022] Based on the aforementioned embodiments of this application, the membrane containment system provided herein includes the aforementioned thermal corner protection structure. This arrangement provides targeted reinforcement for the outer tank bottom while forming a containment structure between the gap and the primary corrugated plate. This prevents cryogenic material from flowing directly into the outer tank through the gap in the event of a leak in the primary corrugated plate, thereby reducing the likelihood of leakage from the liquefied natural gas storage tank and improving safety during use. Furthermore, the skirt plate and secondary corrugated plate overlap to form a double-layer containment structure, further enhancing the sealing effect.

[0023] According to the third aspect of the present application, a film enclosure construction process is provided, which is applicable to the above-mentioned film enclosure system. The film enclosure construction process includes the following steps: pouring the outer tank, and pre-embedding and fixing the embedded parts on the inner wall of the outer tank during the pouring process. The first insulation layer and the second insulation layer are fixed to the inner wall of the outer tank respectively, and a gap is formed between the two. A skirt board is provided, and one end of the skirt board is welded and fixed to the embedded parts, and the other end is fixed to the side of the second insulation layer facing away from the outer tank. A secondary corrugated plate is provided on the side of the second insulation layer facing away from the inner wall of the outer tank, and the secondary corrugated plate is welded and fixed to the skirt board. Then a third insulation layer is provided on the side of the corrugated plate facing away from the inner wall of the outer tank, and then the main corrugated plate is fixed.

[0024] Based on the above-mentioned embodiments of the present application, the film enclosure construction process provided by the present application is applicable to the above-mentioned film enclosure system. Based on the above-mentioned process, the upper insulation module and the lower insulation module are respectively arranged on the inner wall of the outer tank, and gaps are generated based on different structures and different assembly sequences. Subsequently, a retaining structure is formed by setting structures such as embedded parts, skirts and secondary corrugated plates, wrapping the gap inside, and finally the main corrugated plates are set. Finally, a film enclosure system with a single-layer shielding structure above the gap and a double-layer shielding structure below the gap is formed. At the same time, the separation between the gap and the main corrugated plate is achieved, which to a certain extent avoids the damage to the outer tank caused by the material flowing along the gap to the outer tank position when the main corrugated plate leaks, thereby reducing the possibility of leakage in the storage tank.

[0025] In some embodiments, the second insulation layer further includes an anchoring bar, which is disposed on a side of the secondary corrugated plate close to the inner wall of the outer tank, and the skirt plate is fixed to the anchoring bar by welding.

[0026] Based on the above embodiments of the present application, the provision of anchoring strips strengthens the connection strength between the skirt plate and the second insulation layer and the lower insulation module as a whole, and also facilitates the fixing of the second insulation layer and the secondary corrugated plate by anchoring or other means.

[0027] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the present application but do not constitute a limitation of the present application. In the accompanying drawings:

[0029] Figure 1 2 is a cross-sectional schematic diagram of a hot corner protection structure provided in an embodiment of the present application.

[0030] Figure 2 It is a cross-sectional schematic diagram of the lower insulation module in the thermal corner protection structure provided in an embodiment of the present application.

[0031] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0032] Figure 4 yes Figure 2 Schematic diagram of the enlarged portion B.

[0033] Figure 5 It is a planar schematic diagram of the hot corner protection structure provided in an embodiment of the present application.

[0034] Figure 6 This is a schematic structural diagram of the first longitudinal corrugation in the thermal corner protection structure provided by an embodiment of the present application.

[0035] Figure 7 This is a schematic structural diagram of the first longitudinal corrugation in the thermal corner protection structure provided in another embodiment of the present application.

[0036] 1. Upper insulation module; 11. First insulation layer; 2. Lower insulation module; 21. Second insulation layer; 22. Third insulation layer; 3. Outer tank; 4. Gap; 5. Main corrugated plate; 6. Embedded parts; 61. Embedded plate; 62. Connecting plate; 7. Skirt plate; 71. Second longitudinal corrugation; 8. Secondary corrugated plate; 81. First longitudinal corrugation; 82. End cap; 83. First corrugated section; 84. Second corrugated section; 85. Third corrugated section; 9. Anchor bar. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In existing technology, the layered structure of a liquefied natural gas storage tank can be divided into an outer tank structure and an inner membrane enclosure structure. The outer tank structure is usually cast in concrete, while the inner membrane enclosure structure usually consists of a shielding layer and an insulation layer to achieve a sealing and thermal insulation effect.

[0044] In existing technology, membrane enclosures are constructed by dividing the structure into two sections, five meters from the tank bottom. Due to the different pressure and temperature environments experienced by the two sections, the structures of the two sections must be differentiated. This can lead to gaps at the junction of the two sections due to different assembly methods and structures. If the outermost shielding layer is damaged, liquefied natural gas can leak through the gaps into the concrete exterior, causing damage to the outer tank and ultimately leading to a tank leak.

[0045] In order to solve the above problems in the prior art, according to the first aspect of the present application, the embodiment of the present application provides a thermal corner protection structure, which is arranged in the accommodation cavity formed by the outer tank 3. Figures 1 to 4As shown in the figure, the thermal corner protection structure includes an upper insulation module 1 and a lower insulation module 2, an embedded part 6, a secondary corrugated plate 8 and a skirt plate 7. The upper insulation module 1 and the lower insulation module 2 are arranged on the inner wall of the outer tank 3 in the vertical direction, and a gap 4 is formed between the two. The outer sides of the upper insulation module 1 and the lower insulation module 2 are covered with a main corrugated plate 5. The embedded part 6 is fixed to the inner wall of the outer tank 3, and the embedded part 6 is partially located on the side of the gap 4 close to the upper insulation module 1. The secondary corrugated plate 8 is arranged between the lower insulation module 2 and the main corrugated plate 5. The skirt plate 7 is connected between the embedded part 6 and the secondary corrugated plate 8, and is partially located on the side of the gap 4 close to the upper insulation module 1. Among them, the embedded part 6, the skirt plate 7 and the secondary corrugated plate 8 are connected in sequence to separate the gap 4 from the main corrugated plate 5, and a second longitudinal corrugation 71 is provided on the skirt plate 7 along the extension direction.

[0046] Based on the above-mentioned embodiment of the present application, during the construction and assembly of the liquefied natural gas storage tank, the membrane enclosure structure is divided into an upper insulation module 1 and a lower insulation module 2 with a five-meter dividing line. The two are designed with different structures to cope with different pressure and temperature environments. In the present application, the outer side of the upper insulation module 1 is only covered with a shielding structure of the primary corrugated plate 5, while the location of the lower insulation module 2 is provided with a two-layer shielding structure of the primary corrugated plate 5 and the secondary corrugated plate 8. This enhances the shielding effect compared to the area above the gap 4 to meet the higher sealing and insulation requirements of the bottom area of ​​the outer tank 3.

[0047] During this process, the embedded parts 6, skirt plate 7 and secondary corrugated plate 8 are connected in sequence to form a partition structure, which separates the gap 4 and the main corrugated plate 5 on different sides, thereby preventing the low-temperature material from flowing directly to the outer tank 3 through the gap 4, and thus reducing to a certain extent the possibility of the low-temperature material damaging the outer tank 3 when the main corrugated plate 5 leaks.

[0048] Furthermore, when the embedded part 6, the skirt plate 7 and the secondary corrugated plate 8 are connected, the skirt plate 7 is extended from the embedded part 6 to the secondary corrugated plate 8, and a second longitudinal corrugation 71 is provided on the skirt plate 7. On the one hand, the ability of the skirt plate 7 to cope with low-temperature deformation can be improved, and on the other hand, the connection and sealing effect between the skirt plate 7 and the secondary corrugated plate 8 can be strengthened.

[0049] In summary, through the above-mentioned arrangement, while achieving targeted reinforcement of the bottom of the outer tank 3, a retaining structure is formed between the gap 4 and the main corrugated plate 5, thereby preventing the cryogenic material from flowing directly to the outer tank 3 through the gap 4 when the main corrugated plate 5 leaks, thereby reducing the possibility of leakage of the liquefied natural gas storage tank and improving safety during use.

[0050] Specifically, when a liquefied natural gas (LNG) storage tank is in use, the outer tank 3 is typically constructed of a cylindrical structure cast in concrete, and the bottom and top of the tank also require sealing. If the main corrugated plate 5 leaks, the LNG within the tank will leak from the main corrugated plate 5 toward the outer tank 3. Without a thermal protection structure, the LNG will leak inward from the main corrugated plate 5 and then into the outer tank 3 through the gaps 4, further damaging the concrete structure of the outer tank 3 and causing a leak in the LNG storage tank.

[0051] Through the above-mentioned arrangement of the present application, when the main corrugated plate 5 leaks, the liquefied natural gas leaks in from the position of the main corrugated plate 5, and is then blocked outside by the enclosure structure composed of the embedded parts 6, the skirt plate 7 and the secondary corrugated plate 8, thereby separating the leaked liquefied natural gas and the gap 4, thereby reducing the possibility of the liquefied natural gas leaking from the gap 4 to the outer tank 3 and causing damage to the outer tank 3, thereby reducing the possibility of leakage of liquefied natural gas.

[0052] In addition, it should be noted that in the actual production and assembly process, in order to ensure the strength of the gap 4 position and avoid the convection of cold and hot air flows at the gap 4 position, the gap 4 can be filled with materials such as glass wool. The specific selection can be made according to actual conditions, and this application does not impose specific restrictions on this.

[0053] In the present application, any suitable connection method can be selected between the skirt plate 7 and the embedded part 6 and between the skirt plate 7 and the secondary corrugated plate 8 .

[0054] refer to Figures 2 to 4 As shown in , in an exemplary embodiment provided by the present application, the end of the skirt plate 7 can be at least partially staggered with the embedded part 6, and the end of the skirt plate 7 and the embedded part 6 can be welded and fixed. The skirt plate 7 and the secondary corrugated plate 8 are overlapped, and the end of the skirt plate 7 and the secondary corrugated plate 8 can be welded and fixed.

[0055] Based on the above-described embodiments of the present application, the skirt plate 7 and the embedded component 6 are connected by welding. On the one hand, sufficient connection strength is ensured, making the connection between the two more stable. On the other hand, compared with other connection methods, welding provides better sealing performance, ensuring the overall sealing of the sealed cavity and preventing leakage at the connection point between the two. At the same time, by staggering the ends of the skirt plate 7 and the embedded component 6, the contact area between the two is increased, thereby further enhancing the sealing effect at the connection point between the two during welding. Similarly, when the secondary corrugated plate 8 is fixed to the skirt plate 7, the overlap between the two forms a double-layer sealing structure, further strengthening the sealing effect.

[0056] Specifically, when welding the skirt panel 7 to the embedded components 6 and secondary corrugated panels 8 at both ends, to enhance the sealing effect and strengthen the connection strength at the connection points, sealant or gaskets can be placed at the connection points at both ends of the skirt panel 7 to strengthen the sealing effect. For example, sealant can be applied or gaskets can be placed between the intersection of the skirt panel 7 and the embedded components 6 to strengthen the sealing effect. Similarly, sealant or gaskets can be placed at the overlapping locations of the skirt panel 7 and the secondary corrugated panels 8 to strengthen the sealing effect.

[0057] refer to Figure 2 As shown in , in some embodiments of the present application, one end of the skirt plate 7 extends to the embedded part 6 and overlaps with the portion of the embedded part 6 located in the gap 4 , and the secondary corrugated plate 8 is connected to the other end of the skirt plate 7 .

[0058] Alternatively, in some other embodiments of the present application, one end of the skirt panel 7 extends to the embedded part 6 and overlaps with the portion of the embedded part 6 located in the gap 4, and the secondary corrugated plate 8 is connected to the other end of the skirt panel 7. The secondary corrugated plate 8 is attached to the skirt panel 7 and extends toward the embedded part 6, and the secondary corrugated plate 8 overlaps with the portion of the skirt panel 7 located in the gap 4.

[0059] Based on the above-mentioned embodiments of the present application, in one embodiment, the skirt plate 7 is connected between the embedded part 6 and the secondary corrugated plate 8, thereby forming an enclosure structure for separating the gap 4 from the primary corrugated plate 5. In another embodiment, the secondary corrugated plate 8 extends toward the embedded part 6 and overlaps with the skirt plate 7 in the gap 4, thereby forming a double-layer enclosure structure, which strengthens the sealing and connection between the two.

[0060] Further, refer to Figures 2 to 4 As shown in , in some embodiments of the present application, the skirt plate 7 is arranged on the side of the secondary corrugated plate 8 close to the sealing cavity, and the skirt plate 7 is arranged on the side of the embedded part 6 away from the sealing cavity.

[0061] Based on the above-mentioned embodiments of the present application, during the assembly of the hot corner protection structure, the embedded parts 6 need to be pre-embedded in the outer tank 3 during the casting process, so the embedded parts 6 have been pre-fixed. At this time, by setting the skirt plate 7 on the side of the embedded part 6 away from the sealing cavity, that is, the skirt plate 7 is connected to the upper surface of the embedded part 6, the skirt plate 7 can be supported during the assembly and welding process, thereby facilitating assembly. At the same time, after the end of the skirt plate 7 is welded to the surface of the embedded part 6, the staggered position of the two can stably support the skirt plate 7, thereby improving the stability of the connection structure between the two. By setting the skirt plate 7 on the side of the secondary corrugated plate 8 close to the sealing cavity, that is, the skirt plate 7 is closer to the inner wall of the outer tank 3 relative to the secondary corrugated plate 8, it is easy to assemble in sequence during assembly.

[0062] In the present application, the embedded part 6 can be configured as any suitable structure.

[0063] refer to Figure 2 As shown in , in an exemplary embodiment provided in the present application, the embedded part 6 may include an embedded plate 61 and a connecting plate 62, the embedded plate 61 is fixed to the inner wall of the outer tank 3, one end of the connecting plate 62 is connected to the embedded plate 61, and the other end is welded and fixed to the skirt plate 7.

[0064] Based on the above-mentioned embodiments of the present application, a specific structure of the embedded part 6 is provided. The embedded plate 61 is pre-buried in the outer tank 3 to increase the contact area between the embedded part 6 and the outer tank 3 and ensure the connection strength between the embedded part 6 and the outer tank 3. The connecting plate 62 extends into the accommodating cavity and is welded to the skirt plate 7. At this time, the embedded part 6 is configured as a structure with a T-shaped vertical cross-section. In actual production and processing, the embedded plate 61 and the connecting plate 62 can be provided as an integrated unit, which facilitates production and processing while improving the connection strength.

[0065] Specifically, one end of the embedded component 6 is fixed to the outer tank 3, while the other end is connected to another structure for tension fixation. During this process, the embedded plate 61 is provided to increase the contact area with the outer tank 3, thereby reducing the force per unit area of ​​the embedded plate 61. Furthermore, the embedded plate 61 can be reinforced at the contact point with the connecting plate 62 by means of reinforcing ribs or other methods. The specific method can be selected based on actual conditions and is not specifically limited in this application.

[0066] Further, refer to Figure 2 As shown in , in some embodiments of the present application, the connecting plate 62 is arranged in the gap 4 along the radial direction of the accommodating cavity, and the connecting plate 62 is arranged along the upper edge of the gap 4.

[0067] Based on the above-described embodiment of the present application, when the embedded part 6 is installed, the embedded plate 61 is used to fix to the inner wall of the outer tank 3, while the connecting plate 62 is installed in the gap 4 for connecting to the skirt plate 7. By arranging the edge of the connecting plate 62 along the upper edge of the gap 4, the embedded part 6, the skirt plate 7, and the secondary corrugated plate 8 form a sealed cavity that completely includes the gap 4, thereby improving the sealing effect.

[0068] refer to Figures 2 to 5 As shown in , in some embodiments of the present application, a first longitudinal corrugation 81 is provided on the secondary corrugated plate 8 , the extension direction of the first longitudinal corrugation 81 is consistent with the second longitudinal corrugation 71 , and the first longitudinal corrugation 81 at least partially overlaps with the second longitudinal corrugation 71 .

[0069] Based on the above-described embodiment of the present application, the provision of first longitudinal corrugations 81 on the secondary corrugated plate 8 improves the secondary corrugated plate 8's resistance to low-temperature deformation. Furthermore, when the secondary corrugated plate 8 is connected only to the end of the skirt plate 7, the first longitudinal corrugations 81 overlap only with the ends of the second longitudinal corrugations 71. However, when the secondary corrugated plate 8 extends toward the embedded component 6, the first longitudinal corrugations 81 extend with the secondary corrugated plate 8 and overlap with the portion of the second longitudinal corrugations 71 within the gap 4.

[0070] Specifically, during actual production, the interior of liquefied natural gas storage tanks must maintain a low-temperature environment. Consequently, structures such as the primary corrugated plates 5 and secondary corrugated plates 8 may shrink and deform due to the low-temperature environment. However, by forming corrugations in the plates, a certain amount of deformation margin is allowed, thereby preventing damage to the plates caused by low-temperature deformation to a certain extent.

[0071] During the production process, taking the secondary corrugated plate 8 as an example, since the plate deformation is generally uniform in all directions, both transverse and longitudinal corrugations can be provided on the secondary corrugated plate 8 during installation to address the different transverse and longitudinal deformation of the secondary corrugated plate 8 at low temperatures. Similarly, the primary corrugated plate 5 can also be provided with corrugations to address the shrinkage of the plate under low-temperature conditions.

[0072] refer to Figure 4 As shown in FIG, an end portion of the second longitudinal corrugation 71 close to the embedded part 6 may be provided with an end cap 82.

[0073] Based on the above-mentioned embodiment of the present application, the end of the second longitudinal corrugation 71 is sealed by forming an end cap 82. This ensures the sealing effect of the connection position of the skirt plate 7 while leaving a deformation margin for the corrugation, thereby preventing the material stored in the storage tank from leaking from the connection end of the skirt plate 7 in the event of leakage of the main corrugated plate 5.

[0074] In some embodiments of the present application, a filler may be provided in the second longitudinal corrugation 71 , and the filler at least fills the portion of the second longitudinal corrugation 71 located in the gap 4 .

[0075] Based on the above-mentioned embodiment of the present application, the two ends of the gap 4 are respectively connected to the inner wall of the outer tank 3 and the main corrugated plate 5. Since it is necessary to maintain a low temperature environment in the storage tank, the temperature of the main corrugated plate 5 is usually low, even reaching more than 160 degrees below zero, while the temperature of the outer tank 3 is usually close to room temperature or slightly lower than room temperature. Therefore, due to the temperature difference, convection will be generated in the gap 4 and the second longitudinal corrugation 71, which will have a significant impact on the thermal insulation effect of the gap 4. Therefore, the second longitudinal corrugation 71 is filled with a filler, especially the part of the second longitudinal corrugation 71 located in the gap 4, so as to avoid convection in the second longitudinal corrugation 71, thereby improving the thermal insulation effect of the gap 4 area.

[0076] Specifically, in the actual production and processing process, the filler can be made of any suitable material, such as polyurethane, etc., and can be selected according to actual usage conditions. This application does not impose any specific restrictions on this.

[0077] In the present application, the first longitudinal corrugations 81 and the second longitudinal corrugations 71 may be formed in any suitable manner.

[0078] refer to Figure 6 As shown in , in an exemplary embodiment provided in the present application, the second longitudinal corrugation 71 may include a first corrugation segment 83 and a second corrugation segment 84. The first corrugation segment 83 is arranged along the axial direction of the outer tank 3, and the second corrugation segment 84 is arranged along the radial direction of the outer tank 3. The ends of the first corrugation segment 83 and the second corrugation segment 84 that are close to each other are respectively provided with mutually matching inclined surface structures. The inclined surface structures are affixed to each other to connect the first corrugation segment 83 and the second corrugation segment 84 to form an L-shaped structure.

[0079] Or, refer to Figure 7 As shown in , in another exemplary embodiment provided in the present application, the second longitudinal corrugation 71 may further include a third corrugation segment 85, the third corrugation segment 85 is configured as an arc-shaped transition structure, and the third corrugation segment 85 is connected between the first corrugation segment 83 and the second corrugation segment 84 to connect the first corrugation segment 83 and the second corrugation segment 84 to form an L-shaped structure.

[0080] Based on the above-mentioned embodiments of the present application, two specific configurations of the second longitudinal corrugation 71 are provided. In one configuration, the second longitudinal corrugation 71 includes a first corrugation segment 83 and a second corrugation segment 84. By providing an inclined surface structure at the connecting end of the first and second corrugation segments 83 and 84, the first and second corrugation segments 83 and 84 can be assembled to form an L-shaped second longitudinal corrugation 71, thereby matching the shape formed by the extension of the secondary corrugated plate 8. In this case, the connection position between the first and second corrugation segments 83 and 84 can be fixed by welding or other methods. In another configuration, a third corrugation segment 85 with an arc-shaped transition is formed between the first and second corrugation segments 83 and 84. In this case, the first corrugated plate, the second and third corrugation segments 84 and 85 can be formed integrally, for example, by bending or other processing methods.

[0081] Similarly, in some embodiments of the present application, when the secondary corrugated plate 8 extends toward the embedded part 6 and partially overlaps with the skirt plate 7 in the gap 4, the first longitudinal corrugations 81 can also be formed by the above two different methods.

[0082] In one embodiment, the first longitudinal corrugation 81 may include a fourth corrugation segment and a fifth corrugation segment, wherein the fourth corrugation segment is arranged axially along the outer tank 3, and the fifth corrugation segment is arranged radially along the outer tank 3. The adjacent ends of the fourth corrugation segment and the fifth corrugation segment are respectively provided with mutually matching inclined surfaces, and the inclined surfaces are affixed to each other to connect the fourth corrugation segment and the fifth corrugation segment to form an L-shaped structure.

[0083] Alternatively, in another embodiment, the first longitudinal corrugation 81 may further include a sixth corrugation segment, which is configured as an arc-shaped transition structure, and the sixth corrugation segment is connected between the fourth corrugation segment and the fifth corrugation segment to connect the fourth corrugation segment and the fifth corrugation segment to form an L-shaped structure.

[0084] Based on the above-mentioned embodiment of the present application, similar to the second longitudinal corrugations 71, the above-mentioned embodiment also provides two methods for forming the first longitudinal corrugations 81. At the same time, during the specific production and processing process, since the skirt plate 7 and the secondary corrugated plate 8 need to be fitted and fixed, the shapes of the second longitudinal corrugations 71 and the first longitudinal corrugations 81 also need to be compatible, and therefore the same formation method should be used for both.

[0085] refer to Figure 1 As shown in , in some embodiments, the upper insulation module 1 may include a first insulation layer 11, which is disposed between the primary corrugated plate 5 and the inner wall of the outer tank 3 and above the gap 4. The lower insulation module 2 includes a second insulation layer 21, which is disposed between the secondary corrugated plate 8 and the inner wall of the outer tank 3. A third insulation layer 22 is further disposed between the secondary corrugated plate 8 and the primary corrugated plate 5.

[0086] Based on the above-mentioned embodiment of the present application, the first insulation layer 11 is provided for thermal insulation protection at the location of the upper insulation module 1. At the same time, the second insulation layer 21 and the third insulation layer 22 are stacked and provided at the location of the lower insulation module 2, thereby forming a double-layer insulation structure corresponding to the double-layer shielding structure, thereby improving the insulation effect of the bottom area of ​​the storage tank.

[0087] Specifically, in actual use, the first insulation layer 11 may comprise a polyurethane layer, with plywood panels placed on either side of the polyurethane layer for anchoring and fixing. Similarly, the second insulation layer 21 may comprise a polyurethane layer and plywood panels on either side. The third insulation layer 22 may be configured based on insulation requirements, for example, it may comprise only plywood panels. The specific configuration may be determined based on actual conditions and is not specifically limited in this application.

[0088] On the basis of the above technical solution, according to the second aspect of the present application, a film enclosure system is provided, which includes an outer tank 3 and the above-mentioned thermal corner protection structure, and the thermal corner protection structure is arranged in the accommodating cavity formed by the outer tank 3.

[0089] Based on the aforementioned embodiments of this application, the membrane enclosure system provided herein includes the aforementioned thermal corner protection structure. This arrangement achieves targeted reinforcement of the bottom of the outer tank 3 while forming a containment structure between the gap 4 and the primary corrugated plate 5. This prevents cryogenic material from flowing directly into the outer tank 3 through the gap 4 in the event of a leak in the primary corrugated plate 5, thereby reducing the likelihood of leakage from the liquefied natural gas storage tank and improving safety during use. Furthermore, the skirt plate 7 and the secondary corrugated plate 8 overlap to form a double-layer containment structure, further enhancing the sealing effect.

[0090] On the basis of the above technical solution, according to the third aspect of the present application, a film enclosure construction process is provided, which is applicable to the above-mentioned film enclosure system. The film enclosure construction process includes the following steps: pouring the outer tank 3, and pre-embedding and fixing the embedded parts 6 on the inner wall of the outer tank 3 during the pouring process. The first insulation layer 11 and the second insulation layer 21 are respectively fixed on the inner wall of the outer tank 3, and a gap 4 is formed between them. A skirt board 7 is provided, and one end of the skirt board 7 is welded and fixed to the embedded part 6, and the other end is fixed to the side of the second insulation layer 21 facing away from the outer tank 3. A secondary corrugated plate 8 is provided on the side of the second insulation layer 21 facing away from the inner wall of the outer tank 3, and the secondary corrugated plate 8 is welded and fixed to the skirt board 7. Then a third insulation layer 22 is provided on the side of the corrugated plate 8 facing away from the inner wall of the outer tank 3, and then the main corrugated plate 5 is fixed.

[0091] Based on the above-mentioned embodiments of the present application, the film enclosure construction process provided by the present application is applicable to the above-mentioned film enclosure system. Based on the above-mentioned process, the upper insulation module 1 and the lower insulation module 2 are respectively arranged on the inner wall of the outer tank 3, and the gap 4 is generated based on the different structures and the different assembly sequences. Subsequently, a retaining structure is formed by setting structures such as embedded parts 6, skirt plates 7 and secondary corrugated plates 8, and the gap 4 is wrapped inside, and finally the main corrugated plates 5 are set. Finally, a film enclosure system with a single-layer shielding structure above the gap 4 and a double-layer shielding structure below the gap 4 is formed. At the same time, the separation between the gap 4 and the main corrugated plate 5 is achieved, which to a certain extent avoids the material flowing along the gap 4 to the position of the outer tank 3 when the main corrugated plate 5 leaks, causing damage to the outer tank 3, thereby reducing the possibility of leakage in the storage tank.

[0092] refer to Figure 3 As shown in , in some embodiments of the present application, the second insulation layer 21 further includes an anchor bar 9 , which is arranged on the side of the secondary corrugated plate 8 close to the inner wall of the outer tank 3 , and the skirt plate 7 is welded and fixed to the anchor bar 9 .

[0093] Based on the above embodiment of the present application, the anchoring strips 9 are provided to strengthen the connection strength between the skirt plate 7 and the second insulation layer 21 and the lower insulation module 2 as a whole. At the same time, it is also convenient to fix the second insulation layer 21 and the secondary corrugated plate 8 by anchoring or other means.

[0094] Specifically, when assembling the hot corner protection structure, the embedded parts 6 are first pre-embedded on the inner wall of the outer tank 3. At the same time, the polyurethane layer is fixed to the plywood on both sides by gluing or other means, so as to pre-process the first insulation layer 11 and the second insulation layer 21. Subsequently, the second insulation layer 21 is fixed to the inner wall of the outer tank 3 by anchoring or other means, and the anchor bar 9 is fixed to the plywood on the outside of the second insulation layer 21 by anchoring or other means. At this time, one end of the skirt plate 7 is first welded and fixed to the embedded plate 61, and then the other end of the skirt plate 7 is welded and fixed to the anchor bar 9. Then the secondary corrugated plate 8 is installed, and the secondary corrugated plate 8 is fixed to the anchor bar 9 by anchoring or other means, and the end of the secondary corrugated plate 8 is welded and fixed to the skirt plate 7, and finally the third insulation layer 22 is fixed to the outside of the secondary corrugated plate 8 by anchoring. At this time, the overall assembly of the lower protection structure is completed.

[0095] Subsequently, the entire structure of the first insulation layer 11 is fixed to the inner wall of the outer tank 3 by anchoring, thereby completing the fixation of the upper insulation module 1. Finally, the main corrugated plate 5 is respectively covered with the upper insulation module 1 and the lower insulation module 2, and the main corrugated plate 5 is fixed to the adjacent plywood structure by anchoring.

[0096] In addition, it should be noted that in the present application, when the skirt board 7 is assembled and fixed, in order to facilitate stable support of the skirt board 7 during the fixing process, a filling support such as resin putty can be set between the skirt board 7 and the lower insulation layer. At the same time, a horizontal plywood can be placed between the resin putty and the skirt board 7 to ensure the balance when supporting the skirt board 7.

[0097] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

[0098] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0099] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A film enclosure construction process, suitable for the construction of a film enclosure system, characterized in that: The film enclosure construction process comprises the following steps: Casting the outer tank, and during the casting process, pre-embedded parts are embedded and fixed on the inner wall of the outer tank; The first insulation layer and the second insulation layer are respectively fixed to the inner wall of the outer tank, and a gap is formed between the two; A skirt plate is provided, one end of the skirt plate is welded and fixed to the embedded part, and the other end is fixed to the side of the second insulation layer away from the outer tank; A secondary corrugated plate is arranged on the side of the second heat insulation layer away from the inner wall of the outer tank, and the secondary corrugated plate is welded and fixed to the skirt plate; Then, a third insulation layer is arranged on the side of the corrugated plate facing away from the inner wall of the outer tank, and then the main corrugated plate is fixed; The film enclosure system comprises an outer tank and a thermal corner protection structure, wherein the thermal corner protection structure is arranged in a receiving cavity formed by the outer tank; The thermal corner protection structure comprises: The upper insulation module and the lower insulation module are arranged on the inner wall of the outer tank along the vertical direction, and a gap is formed between the two. The outer sides of the upper insulation module and the lower insulation module are covered with a main corrugated plate; An embedded part is fixed to the inner wall of the outer tank, and the embedded part is partially located on a side of the gap close to the upper insulation module; A secondary corrugated plate, disposed between the lower insulation module and the primary corrugated plate; A skirt plate connected between the embedded part and the secondary corrugated plate, and partially disposed on a side of the gap close to the upper insulation module; Wherein, the embedded part, the skirt plate and the secondary corrugated plate are connected in sequence to separate the gap from the primary corrugated plate, and the skirt plate is provided with a second longitudinal corrugation along the extension direction; One end of the skirt plate extends to the embedded part and overlaps with the part of the embedded part located in the gap, and the secondary corrugated plate is connected to the other end of the skirt plate; or, One end of the skirt board extends to the embedded part and overlaps with the part of the embedded part located in the gap, and the secondary corrugated plate is connected to the other end of the skirt board, the secondary corrugated plate is attached to the skirt board and extends toward the embedded part, and the secondary corrugated plate overlaps with the part of the skirt board located in the gap.

2. The film enclosure construction process according to claim 1 is characterized in that: An end cap is provided at the end of the second longitudinal corrugation close to the embedded part.

3. The film enclosure construction process according to claim 1 is characterized in that: The secondary corrugated plate is provided with first longitudinal corrugations, the extension direction of the first longitudinal corrugations is consistent with that of the second longitudinal corrugations, and the first longitudinal corrugations at least partially overlap with the second longitudinal corrugations.

4. The film enclosure construction process according to claim 1 is characterized in that: A filler is disposed in the second longitudinal corrugation, and the filler at least fills a portion of the second longitudinal corrugation located in the gap.

5. The film enclosure construction process according to claim 1 is characterized in that: The second longitudinal corrugation comprises a first corrugation segment and a second corrugation segment, wherein the first corrugation segment is arranged along the axial direction of the outer tank, and the second corrugation segment is arranged along the radial direction of the outer tank; The ends of the first corrugated segment and the second corrugated segment that are close to each other are respectively provided with mutually matching inclined surface structures, and the inclined surface structures are mutually fitted to connect the first corrugated segment and the second corrugated segment to form an L-shaped structure; or, The second longitudinal corrugation also includes a third corrugation segment, which is configured as an arc-shaped transition structure and is connected between the first corrugation segment and the second corrugation segment to connect the first corrugation segment and the second corrugation segment to form an L-shaped structure.

6. The film enclosure construction process according to claim 1, characterized in that: The upper insulation module comprises a first insulation layer, which is arranged between the main corrugated plate and the inner wall of the outer tank and is located above the gap; The lower insulation module comprises a second insulation layer, and the second insulation layer is arranged between the secondary corrugated plate and the inner wall of the outer tank; A third heat insulating layer is also provided between the secondary corrugated plate and the primary corrugated plate.

7. The film enclosure construction process according to claim 1, characterized in that: The second heat insulating layer further comprises an anchoring strip, which is arranged on a side of the secondary corrugated plate close to the inner wall of the outer tank, and the skirt plate is fixed to the anchoring strip by welding.

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