Hot corner protection structure, thin film enclosure system and thin film enclosure construction technology

Abstract

The invention relates to a hot corner protection structure, a thin film enclosure system and a thin film enclosure construction technology. Comprising an upper heat insulation module, a lower heat insulation module, an embedded part, a secondary corrugated plate and an apron board. The upper heat insulation module and the lower heat insulation module are arranged on the inner wall of the outer tank in the vertical direction, a gap is formed between the upper heat insulation module and the lower heat insulation module, and main corrugated plates cover the outer sides of the upper heat insulation module and the lower heat insulation module. The embedded part is fixed to the inner wall of the outer tank and partially located on the side, close to the upper heat insulation module, of the gap. And the secondary corrugated plate is arranged between the lower heat insulation module and the main corrugated plate. The apron board is connected between the embedded part and the secondary corrugated plate and partially arranged on the side, close to the upper heat insulation module, of the gap. The embedded part, the apron board and the secondary corrugated board are sequentially connected to separate the gap from the main corrugated board, and second longitudinal corrugations are arranged on the apron board in the extending direction. According to the hot corner protection structure, the gap position of the thin film enclosure structure can be protected, and the possibility of leakage of the storage tank is reduced.

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 professional equipment in the field of LNG storage and transportation. During the construction process, the tank body needs to be set up with a multi-layer structure to achieve sealing and insulation effects.

[0003] In the prior art, the layer structure of a liquefied natural gas storage tank can be divided into an outer tank structure and an inner membrane enclosure structure, wherein the outer tank structure is usually cast by concrete, and the inner membrane enclosure structure is usually composed of a shielding layer and an insulation layer to achieve sealing and insulation effects.

[0004] In the prior art, when constructing a membrane enclosure structure, the membrane enclosure structure is divided into two parts, the upper and lower parts, with a distance of five meters from the bottom of the tank as the dividing line. Based on the different pressures and temperature environments of the upper and lower parts, the structures of the two parts need to be set differently. This will cause a gap to appear at the junction of the two parts due to different assembly methods and structures. At this time, once the outermost shielding layer is damaged, liquefied natural gas will leak along the gap to the concrete surface, causing damage to the outer tank and eventually causing the tank to 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 to reduce the possibility of leakage of the tank due to material leakage from the gap to the outer tank when the shielding layer is damaged. 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 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. 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 liquefied natural gas storage tanks, 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 layer of shielding structure of the main corrugated plate, while the position of the lower insulation module is provided with two layers of shielding structures of the main corrugated plate and the secondary corrugated plate, thereby enhancing the shielding effect compared to the area above the gap to cope with the higher sealing and insulation requirements of the bottom area of ​​the outer tank. In this process, the gap and the main corrugated plate are separated on different sides by connecting the embedded parts, skirt plates and secondary corrugated plates in sequence, thereby preventing the cryogenic material from flowing directly to the outer tank position through the gap, thereby reducing the possibility of the cryogenic material causing damage to the outer tank when the main corrugated plate leaks to a certain extent. Furthermore, when the embedded parts, the skirt plate and the secondary corrugated plate are connected, while the skirt plate extends from the embedded parts to the secondary corrugated plate, a second longitudinal corrugation is provided on the skirt plate, which can improve the ability of the skirt plate 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 main corrugated plate to prevent the low-temperature material from flowing directly to the outer tank through the gap when the main corrugated plate leaks, thereby reducing the possibility of leakage of 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 end of the second longitudinal corrugation is sealed by forming an end cap, so as to ensure the sealing effect of the skirt board connection position while setting the corrugation to leave a deformation margin, and prevent the material stored in the storage tank from leaking from the connection end of the skirt board in the event of leakage of the main corrugated board.

[0011] In some embodiments, 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. Alternatively, 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.

[0012] Based on the above embodiments of the present application, in one embodiment, the skirt board is connected between the embedded part and the secondary corrugated plate to form an enclosure structure for separating the gap from the primary corrugated plate. In another embodiment, the secondary corrugated plate extends toward the embedded part at the same time and overlaps with the skirt board in the gap to form a double-layer enclosure structure to enhance the sealing and connection effect between the two.

[0013] In some embodiments, a first longitudinal corrugation is provided on the secondary corrugated plate, the extension direction of the first longitudinal corrugation is consistent with the second longitudinal corrugation, and the first longitudinal corrugation at least partially overlaps with the second longitudinal corrugation.

[0014] Based on the above-mentioned embodiments of the present application, by providing the first longitudinal corrugation on the secondary corrugated plate, the ability of the secondary corrugated plate to resist low-temperature deformation is improved. At the same time, when the secondary corrugated plate is only connected to the end of the skirt plate, the first longitudinal corrugation only overlaps with the end of the second longitudinal corrugation. When the secondary corrugated plate extends toward the embedded part, the first longitudinal corrugation extends with the secondary corrugated plate and overlaps with the part of the second longitudinal corrugation in the gap.

[0015] In some embodiments, 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.

[0016] Based on the above-mentioned embodiments of the present application, the two ends of the gap part are connected to the inner wall of the outer tank and the main corrugated plate respectively. Since the low temperature environment in the storage tank needs to be maintained, the temperature of the main corrugated plate is usually low, even reaching more than minus 160 degrees, while the temperature of the outer tank is usually close to room temperature or slightly lower than room temperature. Therefore, convection will be generated in the gap and the second longitudinal corrugation due to the temperature difference, which will have a greater impact on the insulation effect of the gap position. Therefore, the second longitudinal corrugation is filled with a filler, especially the part of the second longitudinal corrugation located in the gap, so as to avoid convection in the second longitudinal corrugation, thereby improving the insulation effect of the gap area.

[0017] In some embodiments, the second longitudinal corrugation includes a first corrugation segment and a second corrugation segment, 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 corrugation segment and the second corrugation segment close to each other are respectively provided with mutually matching inclined surface structures, and the inclined surface structures are fitted to each other to connect the first corrugation segment and the second corrugation segment to form an L-shaped structure. Alternatively, the second longitudinal corrugation also includes a third corrugation segment, the third corrugation segment is arranged as an arc-shaped transition structure, and the third corrugation segment 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.

[0018] Based on the above-mentioned embodiments of the present application, two specific settings of the second longitudinal corrugation are provided. In one of the modes, the second longitudinal corrugation includes a first corrugation segment and a second corrugated plate. By setting a slope structure at the connecting end of the two, the two can be assembled to form an L-shaped first longitudinal corrugation, thereby matching the shape formed by the extension of the secondary corrugated plate. At this time, the connection position between the first corrugation segment and the second corrugation segment can be fixed by welding or the like. In another mode, a third corrugation segment with an arc-shaped transition is formed between the first corrugation segment and the second corrugation segment. At this time, the first corrugated plate, the second corrugated segment and the third corrugated segment can be formed as a whole, for example, by bending or the like.

[0019] In some embodiments, the upper insulation module includes a first insulation layer, which is disposed between the primary corrugated plate and the inner wall of the outer tank and is located above the gap. The lower insulation module includes a second insulation layer, which is 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 embodiment of the present application, the first insulation layer is provided for insulation protection at the position of the upper insulation module. Meanwhile, the second insulation layer and the third insulation layer are stacked and provided at the position of the lower insulation module, thereby forming a double-layer insulation structure corresponding to the double-layer shielding structure, and improving the 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 containing cavity formed by the outer tank.

[0022] Based on the above-mentioned embodiments of the present application, the film enclosure system provided by the present application includes the above-mentioned thermal corner protection structure. Through the above-mentioned arrangement, while achieving targeted reinforcement of the bottom of the outer tank, a containment structure is formed between the gap and the main corrugated plate to prevent low-temperature materials from flowing directly to the outer tank through the gap when the main corrugated plate leaks, thereby reducing the possibility of leakage of the liquefied natural gas storage tank and improving safety during use. At the same time, the skirt plate and the secondary corrugated plate are overlapped to form a double-layer containment structure to further enhance 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 respectively fixed to the inner wall of the outer tank, and a gap is formed between the two. A skirt plate is provided, and one end of the skirt plate 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 plate. 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 orders. Subsequently, a containment structure is formed by setting structures such as embedded parts, skirts and secondary corrugated plates, wrapping the gap inside, and finally the main corrugated plate is 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 anchor 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 anchor bar by welding.

[0026] Based on the above embodiments of the present application, the connection strength between the skirt board and the second insulation layer and the lower insulation module as a whole is strengthened by setting the anchoring strips, and at the same time, the second insulation layer and the secondary corrugated board are easily fixed by anchoring or the like.

[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 specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings: Figure 1 It is a cross-sectional schematic diagram of the hot corner protection structure provided in an embodiment of the present application.

[0029] 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.

[0030] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0031] Figure 4 yes Figure 2 Schematic diagram of the enlarged portion B.

[0032] Figure 5 It is a plan view of a hot corner protection structure provided in an embodiment of the present application.

[0033] Figure 6 It is a schematic structural diagram of the first longitudinal corrugation in the thermal corner protection structure provided in an embodiment of the present application.

[0034] Figure 7 It is a schematic structural diagram of the first longitudinal corrugation in the thermal corner protection structure provided in another embodiment of the present application.

[0035] 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 strip. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0039] 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, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of this application, it should be noted that, in the absence of any contrary explanation, the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the prior art, the layer structure of a liquefied natural gas storage tank can be divided into an outer tank structure and an inner membrane enclosure structure, wherein the outer tank structure is usually cast by concrete, and the inner membrane enclosure structure is usually composed of a shielding layer and an insulation layer to achieve sealing and insulation effects.

[0043] In the prior art, when constructing a membrane enclosure structure, the membrane enclosure structure is divided into two parts, the upper and lower parts, with a distance of five meters from the bottom of the tank as the dividing line. Based on the different pressures and temperature environments of the upper and lower parts, the structures of the two parts need to be set differently. This will cause a gap to appear at the junction of the two parts due to different assembly methods and structures. At this time, once the outermost shielding layer is damaged, liquefied natural gas will leak along the gap to the concrete surface, causing damage to the outer tank and eventually causing the tank to leak.

[0044] In order to solve the above problems in the prior art, according to the first aspect of the present application, an 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 along 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 arranged on the skirt plate 7 along the extension direction.

[0045] 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 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 main corrugated plate 5, while the position of the lower insulation module 2 is provided with two shielding structures of the main corrugated plate 5 and the secondary corrugated plate 8, thereby enhancing the shielding effect compared to the area above the gap 4, in order to cope with the higher sealing and insulation requirements of the bottom area of ​​the outer tank 3.

[0046] In 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, thereby reducing to a certain extent the possibility of the low-temperature material damaging the outer tank 3 when the main corrugated plate 5 leaks.

[0047] Furthermore, when the embedded part 6, the skirt board 7 and the secondary corrugated plate 8 are connected, while the skirt board 7 extends from the embedded part 6 to the secondary corrugated plate 8, a second longitudinal corrugation 71 is provided on the skirt board 7, which can improve the ability of the skirt board 7 to cope with low-temperature deformation on the one hand, and strengthen the connection and sealing effect between the skirt board 7 and the secondary corrugated plate 8 on the other hand.

[0048] 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 to prevent the low-temperature 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.

[0049] Specifically, when the liquefied natural gas storage tank is used, the outer tank 3 is usually formed into a cylindrical tank structure by pouring concrete, and the bottom and top of the tank body also need to be sealed. When the main corrugated plate 5 leaks, the liquefied natural gas in the tank will leak from the main corrugated plate 5 to the outer tank 3. In the absence of a thermal corner protection structure, the liquefied natural gas will leak inward from the main corrugated plate 5, and then leak from the gap 4 to the outer tank 3, thereby damaging the concrete structure of the outer tank 3, causing leakage of the liquefied natural gas storage tank.

[0050] 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 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.

[0051] 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 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 any specific restrictions on this.

[0052] 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 .

[0053] 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 can be welded and fixed to the embedded part 6. 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.

[0054] Based on the above-mentioned embodiments of the present application, the skirt plate 7 and the embedded part 6 are connected by welding. On the one hand, sufficient connection strength is guaranteed, making the connection between the two more stable. On the other hand, compared with other connection methods, welding has better sealing performance, which can ensure the overall sealing performance of the sealing cavity and avoid leakage at the connection position between the two. At the same time, by arranging the end of the skirt plate 7 and the embedded part 6 to be partially staggered, the contact area between the two is increased, so that the sealing effect of the connection position between the two can be further enhanced during welding. Similarly, when the secondary corrugated plate 8 and the skirt plate 7 are fixed, a double-layer sealing structure is formed by overlapping the two, thereby further enhancing the sealing effect.

[0055] Specifically, when the skirt board 7 is welded to the embedded parts 6 and the secondary corrugated plate 8 at both ends, in order to improve the sealing effect and strengthen the connection strength at the connection position, sealants or gaskets can be respectively set at the connection positions at both ends of the skirt board 7 to strengthen the sealing effect. For example, at the connection position between the skirt board 7 and the embedded parts 6, sealants are applied or gaskets are set between the staggered positions of the two to strengthen the sealing effect. Similarly, sealants or gaskets can be set at the overlapping positions of the skirt board 7 and the secondary corrugated plate 8 to strengthen the sealing effect.

[0056] 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 .

[0057] Alternatively, in some other embodiments of the present application, one end of the skirt board 7 extends to the embedded part 6 and overlaps with the portion of the embedded part 6 located in the gap 4, the secondary corrugated plate 8 is connected to the other end of the skirt board 7, the secondary corrugated plate 8 is attached to the skirt board 7 and extends toward the embedded part 6, and the secondary corrugated plate 8 overlaps with the portion of the skirt board 7 located in the gap 4.

[0058] Based on the above 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 simultaneously extends toward the embedded part 6 and overlaps with the skirt plate 7 in the gap 4, thereby forming a double-layer enclosure structure to enhance the sealing and connection effect between the two.

[0059] Further, refer to Figures 2 to 4 As shown in , in some embodiments of the present application, the skirt plate 7 is arranged on a side of the secondary corrugated plate 8 close to the sealing cavity, and the skirt plate 7 is arranged on a side of the embedded part 6 away from the sealing cavity.

[0060] 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 pouring process, so the embedded parts 6 have been fixed in advance. 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, so as to facilitate 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, so that it can be assembled in sequence during assembly.

[0061] In the present application, the embedded part 6 can be set to any suitable structure.

[0062] 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.

[0063] Based on the above-mentioned embodiments of the present application, a specific structure of an embedded part 6 is provided. Among them, the embedded plate 61 is pre-embedded 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 and fixed to the skirt plate 7. At this time, the embedded part 6 is overall set to a T-shaped structure with a vertical cross section, and in the actual production and processing process, the embedded plate 61 and the connecting plate 62 can be set as a whole, which is convenient for production and processing while improving the connection strength.

[0064] Specifically, one end of the embedded part 6 is fixed to the outer tank 3, and the other end is connected to other structures for pulling and fixing. In this process, by setting the embedded plate 61, the contact area with the outer tank 3 is increased, thereby reducing the force per unit area of ​​the embedded plate 61. At the same time, at the contact position between the embedded plate 61 and the connecting plate 62, it can be strengthened by setting reinforcing ribs, etc., which can be selected according to actual conditions, and this application does not make specific restrictions on this.

[0065] 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.

[0066] Based on the above-mentioned embodiment of the present application, when the embedded part 6 is provided, the embedded plate 61 is used to be fixed to the inner wall of the outer tank 3, and the connecting plate 62 is provided in the gap 4 to be connected to the skirt plate 7. By providing the edge of the connecting plate 62 along the upper edge of the gap 4, the embedded part 6 can completely include the gap 4 when the skirt plate 7 and the secondary corrugated plate 8 form a sealed cavity, thereby improving the sealing effect.

[0067] 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 .

[0068] Based on the above-mentioned embodiment of the present application, the first longitudinal corrugation 81 is provided on the secondary corrugated plate 8, thereby improving the ability of the secondary corrugated plate 8 to resist low-temperature deformation. At the same time, when the secondary corrugated plate 8 is only connected to the end of the skirt plate 7, the first longitudinal corrugation 81 only overlaps with the end of the second longitudinal corrugation 71. When the secondary corrugated plate 8 extends toward the embedded part 6, the first longitudinal corrugation 81 extends with the secondary corrugated plate 8 and overlaps with the part of the second longitudinal corrugation 71 in the gap 4.

[0069] Specifically, in the actual production process, since the interior of the liquefied natural gas storage tank needs to maintain a low temperature environment, the primary corrugated plate 5 and the secondary corrugated plate 8 and other structures will shrink and deform due to the low temperature environment during use. By forming corrugations on the plate body, a certain amount of deformation margin can be reserved for the plate body, thereby avoiding the possibility of damage to the plate body due to low temperature deformation to a certain extent.

[0070] In the specific production and processing process, taking the secondary corrugated plate 8 as an example, since the deformation of the plate body is usually relatively uniform in all directions, when setting, transverse corrugations and longitudinal corrugations can be set on the secondary corrugated plate 8 at the same time to cope with the different deformation conditions of the secondary corrugated plate 8 in the transverse and longitudinal directions at low temperatures. Similarly, the primary corrugated plate 5 can also be provided with corrugations to cope with the plate body shrinkage problem under low temperature conditions.

[0071] refer to Figure 4 As shown in FIG. 8 , an end cap 82 may be provided at the end of the second longitudinal corrugation 71 close to the embedded part 6 .

[0072] 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. Thus, the corrugation is provided with a deformation margin, and at the same time, the sealing effect of the connection position of the skirt plate 7 is ensured, so as to prevent the material stored in the storage tank from leaking from the connection end of the skirt plate 7 when the main corrugated plate 5 leaks.

[0073] 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 .

[0074] 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 the low temperature environment in the storage tank needs to be maintained, the temperature of the main corrugated plate 5 is usually low, even reaching more than minus 160 degrees, while the temperature of the outer tank 3 is usually close to room temperature or slightly lower than room temperature. Therefore, convection will be generated in the gap 4 and the second longitudinal corrugation 71 due to the temperature difference, which will have a greater 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.

[0075] Specifically, in the actual production and processing process, the filler can be selected from any suitable material, such as polyurethane, etc., and the specific selection can be made according to the actual usage situation. This application does not make any specific restrictions on this.

[0076] In the present application, the first longitudinal corrugations 81 and the second longitudinal corrugations 71 may be formed in any suitable manner.

[0077] 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 close to each other are respectively provided with mutually matching inclined surface structures, and the inclined surface structures are fitted to each other to connect the first corrugation segment 83 and the second corrugation segment 84 to form an L-shaped structure.

[0078] Or, refer to Figure 7 As shown in, in another exemplary embodiment provided in the present application, the second longitudinal corrugation 71 may also 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.

[0079] Based on the above-mentioned embodiments of the present application, two specific configurations of the second longitudinal corrugation 71 are provided. In one of the configurations, 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 two, the two 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. At this time, the connection position between the first corrugation segment 83 and the second corrugation segment 84 can be fixed by welding or the like. In another configuration, a third corrugation segment 85 with an arc-shaped transition is formed between the first corrugation segment 83 and the second corrugation segment 84. At this time, the first corrugated plate, the second corrugation segment 84 and the third corrugation segment 85 can be formed as a whole, for example, by processing and forming by bending or the like.

[0080] 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 in the above two different ways.

[0081] 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 ends of the fourth corrugation segment and the fifth corrugation segment close to each other are respectively provided with mutually matching inclined surface structures, and the inclined surface structures are fitted to each other to connect the fourth corrugation segment and the fifth corrugation segment to form an L-shaped structure.

[0082] 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 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.

[0083] Based on the above embodiments of the present application, the above embodiments also provide two ways of forming the first longitudinal corrugations 81, similar to the second longitudinal corrugations 71. At the same time, in 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, so the two should use the same forming method.

[0084] 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 is located 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 also disposed between the secondary corrugated plate 8 and the primary corrugated plate 5.

[0085] Based on the above-mentioned embodiment of the present application, the first insulation layer 11 is provided for insulation protection at the position 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 position of the lower insulation module 2, thereby forming a double-layer insulation structure corresponding to the double-layer shielding structure, and improving the insulation effect of the bottom area of ​​the storage tank.

[0086] Specifically, in actual use, the first insulation layer 11 may include a polyurethane layer, and plywood may be provided on both sides of the polyurethane layer for anchoring and fixing. Similarly, the second insulation layer 21 may also include a polyurethane layer and plywood on both sides. The third insulation layer 22 may be provided according to insulation requirements, for example, it may be provided to include only plywood. It may be provided specifically according to actual conditions, and the present application does not impose any specific restrictions on this.

[0087] 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.

[0088] Based on the above-mentioned embodiments of the present application, the film enclosure system provided by the present application includes the above-mentioned thermal corner protection structure. Through the above-mentioned arrangement, while achieving targeted reinforcement of the bottom of the outer tank 3, a containment structure is formed between the gap 4 and the main corrugated plate 5 to prevent 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. At the same time, the skirt plate 7 and the secondary corrugated plate 8 are overlapped to form a double-layer containment structure to further enhance the sealing effect.

[0089] 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 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 the two. A skirt plate 7 is provided, and one end of the skirt plate 7 is welded and fixed to the embedded parts 6, and the other end is fixed to the side of the second insulation layer 21 away from the outer tank 3. A secondary corrugated plate 8 is provided on the side of the second insulation layer 21 away from the inner wall of the outer tank 3, and the secondary corrugated plate 8 is welded and fixed to the skirt plate 7. Then a third insulation layer 22 is provided on the side of the corrugated plate 8 away from the inner wall of the outer tank 3, and then the main corrugated plate 5 is fixed.

[0090] 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 orders. Subsequently, a containment 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 plate 5 is 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 damage to the outer tank 3 caused by the material flowing along the gap 4 to the position of the outer tank 3 when the main corrugated plate 5 leaks, thereby reducing the possibility of leakage in the storage tank.

[0091] 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 one 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.

[0092] Based on the above embodiments of the present application, the connection strength between the skirt board 7 and the second insulation layer 21 and the lower insulation module 2 is strengthened by setting the anchoring strip 9. At the same time, it is also convenient to fix the second insulation layer 21 and the secondary corrugated board 8 by anchoring or the like.

[0093] Specifically, when the hot corner protection structure is assembled, the embedded part 6 is 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 methods, so as to pre-process the first insulation layer 11 and the second insulation layer 21. Then, the second insulation layer 21 is fixed to the inner wall of the outer tank 3 by anchoring or other methods, and the anchor bar 9 is fixed to the plywood on the outside of the second insulation layer 21 by anchoring or other methods. 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 methods, 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.

[0094] Subsequently, the first insulation layer 11 is fixed to the inner wall of the outer tank 3 by anchoring, etc., so that the upper insulation module 1 is fixed. Finally, the main corrugated plate 5 covers the upper insulation module 1 and the lower insulation module 2 respectively, and the main corrugated plate 5 is fixed to the adjacent plywood and other structures by anchoring.

[0095] 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 arranged between the skirt board 7 and the lower insulation layer. At the same time, a horizontal plywood can be arranged between the resin putty and the skirt board 7 to ensure the balance when supporting the skirt board 7.

[0096] 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, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0097] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0098] In addition, the various implementation modes 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 hot corner protection structure, arranged in a receiving cavity formed by an outer tank, characterized in that: 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; 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 a second longitudinal corrugation is arranged on the skirt plate along the extension direction.

2. The thermal corner protection structure according to claim 1, characterized in that: An end cap is provided at the end of the second longitudinal corrugation close to the embedded part.

3. The thermal corner protection structure according to claim 1 or 2, characterized in that: 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.

4. The thermal corner protection structure according to claim 3, 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.

5. The thermal corner protection structure according to claim 1, 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.

6. The thermal corner protection structure according to claim 3, 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.

7. The thermal corner protection structure 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.

8. A film enclosure system, characterized in that: The membrane enclosure system comprises: outer tank; and, The thermal corner protection structure according to any one of claims 1 to 7, wherein the thermal corner protection structure is arranged in a receiving cavity formed by the outer tank.

9. A film enclosure construction process, applicable to the film enclosure system according to claim 8, 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.

10. The film enclosure construction process according to claim 9, 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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