Hot corner protection structure and liquefied gas storage tank

Abstract

The invention relates to a hot corner protection structure and a liquefied gas storage tank. The hot corner protection structure is arranged in a containing cavity formed by the outer tank. The hot corner protection structure comprises an upper heat insulation module, a lower heat insulation module, an apron board and a secondary corrugated plate. 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. One end of the apron board is connected to the inner wall of the outer tank. Wherein the secondary corrugated plate extends and is connected to the main corrugated plate, so that a first sealing area is separated between the secondary corrugated plate and the main corrugated plate, the skirt plate is connected to the secondary corrugated plate to enclose the lower heat insulation module and form a second sealing area, and the gap is located in the second sealing area. According to the hot corner protection structure, the gap position between the upper part and the lower part of the 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 liquefied gas storage tanks, and in particular, to a thermal corner protection structure and a liquefied gas storage tank. Background Art

[0002] Liquefied gas storage tanks usually include full-volume tanks and membrane tanks. Among them, membrane tanks use membrane enclosure structures as shielding and insulation layers inside the tank. Compared with full-volume tanks, membrane tanks occupy less internal space, so they can effectively increase the internal volume of the tank.

[0003] In the prior art, during the construction of a membrane tank, the pressure and temperature that the tank wall has to withstand are different depending on the depth of the tank body. Therefore, during construction, the membrane enclosure structure is usually 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 form at the junction of the two parts due to different assembly methods and structures. At this time, once the outermost shielding layer is damaged, the liquefied gas will leak along the gap to the concrete surface, causing damage to the outer tank and ultimately causing the tank to leak.

[0004] 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

[0005] The purpose of this application is to provide a hot corner protection structure and a liquefied gas storage tank, which can protect the gap between the upper and lower parts of the membrane enclosure structure, and 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.

[0006] 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, a lower insulation module, a skirt plate and a secondary corrugated 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. One end of the skirt plate is connected to the inner wall of the outer tank, and the other end extends along the gap toward the direction close to the main corrugated plate. The secondary corrugated plate is arranged between the main corrugated plate and the lower insulation module. Among them, the secondary corrugated plate extends and is connected to the main corrugated plate to separate a first sealing area between it and the main corrugated plate, and the skirt plate is connected to the secondary corrugated plate to enclose the lower insulation module and form a second sealing area, and the gap is located in the second sealing area.

[0007] Based on the above-mentioned embodiments of the present application, when constructing a liquefied gas storage tank, the film enclosure structure is divided into an upper insulation module and a lower insulation module with a gap as an interval, so that the upper insulation module and the lower insulation module can be set to different structures, thereby specifically strengthening the insulation effect of the bottom area of ​​the storage tank. Specifically, a secondary corrugated plate is set at the location of the lower insulation module, so as to form a shielding structure of a double-layer corrugated plate in conjunction with the main corrugated plate, thereby strengthening the insulation and shielding effect of the bottom area of ​​the storage tank. In this process, the secondary corrugated plate is connected with the main corrugated plate to separate the first sealing area, the skirt plate is connected with the secondary corrugated plate to separate the second sealing area, and the gap is sealed in the second sealing area to achieve sealing protection for the gap position. At this time, even if the main corrugated plate leaks, the liquefied gas flows toward the outer tank, and it will be blocked by the enclosure structure formed by the connection of the secondary corrugated plate and the skirt plate, thereby reducing the possibility of the liquefied gas flowing to the outer tank and causing the outer tank to be damaged, and reducing the possibility of leakage of the liquefied gas storage tank. Furthermore, by forming a first sealing area and a second sealing area respectively, the interior of the lower insulation module is separated and protected, thereby further improving the insulation and shielding effects at the location of the lower insulation module, thereby improving the overall safety of the liquefied gas storage tank.

[0008] In some embodiments, the primary corrugated plate includes an upper primary shield and a lower primary shield, a sealing ring plate is disposed between the upper primary shield and the lower primary shield, and the sealing ring plate is disposed on a side of the primary corrugated plate close to the outer tank. The secondary corrugated plate is fixedly connected to the sealing ring plate.

[0009] Based on the above-mentioned embodiments of the present application, the main corrugated plate is divided into an upper main shield and a lower main shield, and the two are connected by a sealing ring plate. On the one hand, the setting of the sealing ring plate facilitates the fixation between the secondary corrugated plate, and on the other hand, the upper main shield and the lower main shield are connected by the sealing ring plate to ensure the overall sealing shielding effect of the main corrugated plate.

[0010] In some embodiments, a first sealing area is enclosed between the secondary corrugated plate and the lower primary shield, and a third sealing area is enclosed between the upper primary shield and the skirt plate.

[0011] Based on the above-mentioned embodiments of the present application, the upper main shield and the skirt plate cooperate to form a third sealing area. At this time, the first sealing area, the second sealing area and the third sealing area are independent of each other, so that the entire membrane enclosure system is sealed in modules. At this time, even if a leak occurs at a certain position of the main corrugated plate, the leaked liquefied gas can be limited to a single sealing area as much as possible, thereby reducing the impact on other areas, preventing more serious leakage of liquefied gas as much as possible, and improving the safety of liquefied gas storage tanks when in use.

[0012] In some embodiments, the sealing ring plate overlaps with the upper main shield portion and is fixed to the upper main shield by welding. The sealing ring plate overlaps with the lower main shield portion and is fixed to the lower main shield by welding.

[0013] Based on the above-mentioned embodiments of the present application, by setting a partial overlap between the sealing ring plate and the upper main shield, the contact area between the two is increased, thereby enhancing the sealing effect of the contact position between the two when the two are connected. Fixing them by welding can not only ensure the connection strength of the connection position between the two, but also ensure the sealing effect of the contact position between the two. Similarly, by setting a partial overlap between the sealing ring plate and the lower main shield, the sealing effect of the contact position between the two is increased. Connecting and fixing the two by welding ensures the connection strength while enhancing the sealing effect of the connection position between the two.

[0014] In some embodiments, a first corrugation is formed on the upper main shield, and a first end cap is provided at the end of the first corrugation close to the sealing ring plate. A second corrugation is formed on the lower main shield, and a second end cap is provided at the end of the second corrugation close to the sealing ring plate.

[0015] Based on the above-mentioned embodiments of the present application, a certain amount of deformable margin is reserved on the upper main shield by forming the first corrugation, so that the upper main shield can better cope with the shrinkage deformation caused by temperature changes, and the setting of the first end cap can seal the end of the first corrugation to prevent liquefied gas from leaking from the end of the first corrugation. Similarly, a certain amount of deformable margin is reserved for the lower main shield by setting the second corrugation, and the second end cap is set to seal the end of the second corrugation.

[0016] In some embodiments, one end of the skirt plate close to the secondary corrugated plate partially overlaps with the secondary corrugated plate, and the skirt plate is fixed to the secondary corrugated plate by welding.

[0017] Based on the above-mentioned embodiments of the present application, by setting the end of the skirt plate to overlap with the corrugated plate part, the contact area of ​​the connection position between the two is increased, thereby enhancing the sealing effect of the contact position between the two when the two are connected. Fixing them by welding can not only ensure the connection strength of the connection position between the two, but also ensure the sealing effect of the contact position between the two. In summary, the sealing effect of the connection position between the skirt plate and the secondary corrugated plate is strengthened by the above-mentioned setting, thereby enhancing the overall sealing effect of the second sealing area.

[0018] In some embodiments, the secondary corrugated plate includes a first plate body and a second plate body, one end of the second plate body is fixedly connected to the sealing ring plate, and the other end is connected to the first plate body.

[0019] Based on the above-mentioned embodiments of the present application, the secondary corrugated plate is specifically divided into a first plate body and a second plate body, and the end of the second plate body is connected to the sealing ring plate to enclose a first sealing area.

[0020] In some embodiments, a third corrugation is formed on the first plate body, and a third end cap is formed on an end of the third corrugation close to the second plate body.

[0021] Based on the above-mentioned embodiments of the present application, a certain deformation margin is reserved for the secondary corrugated plate by forming the third corrugation on the first plate body. At the same time, the provision of the third end cap can seal the third corrugation and enhance the sealing effect of the second sealing area.

[0022] In some embodiments, the upper main shield and the lower main shield are respectively fixed to the sealing ring plate by welding. The second plate body is fixed to the sealing ring plate by welding.

[0023] Based on the above embodiments of the present application, the connection positions of the sealing ring plate and the primary corrugated plate and the secondary corrugated plate are fixed by welding, thereby ensuring the connection strength and enhancing the sealing effect of the connection position, thereby achieving simple, stable and reliable fixation.

[0024] According to a second aspect of the present application, a liquefied gas storage tank 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.

[0025] Based on the above-mentioned embodiments of the present application, the liquefied gas storage tank provided by the present application includes the above-mentioned thermal corner protection structure. Through the setting of the above-mentioned thermal corner protection structure, the gap between the upper insulation module and the lower insulation module is sealed separately in the second sealing area by separating the first sealing area, the second sealing area and the third sealing area between the main corrugated plate and the outer tank. At this time, even if the main corrugated plate leaks, it can prevent the liquefied gas from directly leaking through the gap to the outer tank part and causing damage to the outer tank to a certain extent, thereby improving the safety of the liquefied gas storage tank.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0029] Figure 3 It is a schematic structural diagram of the first sealing area, the second sealing area and the third sealing area in the thermal corner protection structure provided in an embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of the main corrugated plate in the thermal corner protection structure provided in an embodiment of the present application.

[0031] 1. Upper insulation module; 11. Third sealing area; 12. First insulation layer; 2. Lower insulation module; 21. Second insulation layer; 22. Third insulation layer; 3. Main corrugated plate; 31. Upper main shield; 32. Lower main shield; 33. Sealing ring plate; 34. First corrugation; 35. First end cap; 36. Second corrugation; 37. Second end cap; 4. Skirt; 5. Outer tank; 6. Gap; 7. Second corrugated plate; 71. First sealing area; 72. Second sealing area; 73. First plate body; 74. Second plate body; 75. Third corrugation; 76. Third end cap; 8. Embedded parts; 81. Embedded plate; 82. Connecting plate; 9. Resin putty; 91. Horizontal plywood. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Liquefied gas storage tanks usually include full-volume tanks and membrane tanks. Among them, membrane tanks use membrane enclosure structures as shielding and insulation layers inside the tank. Compared with full-volume tanks, membrane tanks occupy less internal space, so they can effectively increase the internal volume of the tank.

[0039] In the prior art, during the construction of a membrane tank, the pressure and temperature that the tank wall has to withstand are different depending on the depth of the tank body. Therefore, during construction, the membrane enclosure structure is usually 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 form at the junction of the two parts due to different assembly methods and structures. At this time, once the outermost shielding layer is damaged, the liquefied gas will leak along the gap to the concrete surface, causing damage to the outer tank and ultimately causing the tank to leak.

[0040] 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 5. Figures 1 to 3 As shown in , the thermal corner protection structure includes an upper insulation module 1, a lower insulation module 2, a skirt plate 4 and a secondary corrugated plate 7. The upper insulation module 1 and the lower insulation module 2 are arranged on the inner wall of the outer tank 5 along the vertical direction, and a gap 6 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 3. One end of the skirt plate 4 is connected to the inner wall of the outer tank 5, and the other end extends along the gap 6 toward the direction close to the main corrugated plate 3. The secondary corrugated plate 7 is arranged between the main corrugated plate 3 and the lower insulation module 2. Among them, the secondary corrugated plate 7 extends and is connected to the main corrugated plate 3 to separate a first sealing area 71 between it and the main corrugated plate 3, and the skirt plate 4 is connected to the secondary corrugated plate 7 to enclose the lower insulation module 2 and form a second sealing area 72, and the gap 6 is located in the second sealing area 72.

[0041] Based on the above-mentioned embodiments of the present application, when constructing a liquefied gas storage tank, the film enclosure structure is divided into an upper insulation module 1 and a lower insulation module 2 with a gap 6 as an interval, so that the upper insulation module 1 and the lower insulation module 2 can be set to different structures, thereby specifically strengthening the insulation effect of the bottom area of ​​the storage tank. Specifically, a secondary corrugated plate 7 is set at the location of the lower insulation module 2, so as to cooperate with the primary corrugated plate 3 to form a double-layer corrugated plate shielding structure, thereby strengthening the insulation and shielding effect of the bottom area of ​​the storage tank.

[0042] In this process, the secondary corrugated plate 7 is connected with the primary corrugated plate 3 to separate the first sealing area 71, the skirt plate 4 is connected with the secondary corrugated plate 7 to separate the second sealing area 72, and the gap 6 is sealed in the second sealing area 72, so as to achieve sealing protection for the position of the gap 6. At this time, even if the primary corrugated plate 3 leaks, the liquefied gas flows toward the outer tank 5, which will be blocked by the enclosure structure formed by the secondary corrugated plate 7 and the skirt plate 4, thereby reducing the possibility of the liquefied gas flowing to the outer tank 5 and causing the outer tank 5 to be damaged, and reducing the possibility of leakage of the liquefied gas storage tank.

[0043] Furthermore, by forming a first sealing area 71 and a second sealing area 72 respectively, the interior of the lower insulation module 2 is separated and protected, thereby further improving the insulation and shielding effects of the location of the lower insulation module 2, and improving the overall safety of the liquefied gas storage tank.

[0044] In addition, it should be noted that the above-mentioned "one end of the skirt plate 4 is connected to the inner wall of the outer tank 5" in the present application includes both the skirt plate 4 being directly connected to the inner wall of the outer tank 5 and the skirt plate 4 being indirectly fixed to the inner wall of the outer tank 5, that is, the skirt plate 4 is not in direct contact with the inner wall of the outer tank 5, but is connected and fixed to the inner wall of the outer tank 5 through other structures.

[0045] For example, refer to Figure 3 As shown in , in some embodiments of the present application, an embedded part 8 may be provided on the inner wall of the outer tank 5. The embedded part 8 is pre-embedded on the inner wall of the outer tank 5 during the pouring process of the outer tank 5, and is fixed to the inner wall of the outer tank 5 after the outer tank 5 solidifies. Subsequently, the end of the skirt plate 4 is directly fixed to the embedded part 8 by welding or the like, thereby achieving indirect fixation between the skirt plate 4 and the inner wall of the outer tank 5.

[0046] Through the above arrangement, the embedded part 8 is pre-embedded in the inner wall of the outer tank 5, which can ensure the connection strength with the outer tank 5 and avoid damaging the inner wall of the outer tank 5 by burying expansion screws. At the same time, by providing the embedded part 8, the skirt board 4 can be easily assembled. The skirt board 4 does not need to be fixed to the inner wall of the outer tank 5 in advance. After the lower insulation module 2 is assembled, the skirt board 4 can be connected to the embedded part 8, thereby reducing the difficulty of construction.

[0047] Further references Figure 3As shown in , in some embodiments of the present application, the embedded part 8 may include an embedded plate 81 and a connecting plate 82, the embedded plate 81 is fixed to the inner wall of the outer tank 5, one end of the connecting plate 82 is connected to the embedded plate 81, and the other end is welded and fixed to the skirt plate 4.

[0048] Based on the above-mentioned embodiments of the present application, a specific structure of an embedded part 8 is provided. Among them, the embedded plate 81 is pre-embedded in the outer tank 5 to increase the contact area between the embedded part 8 and the outer tank 5, and ensure the connection strength between the embedded part 8 and the outer tank 5. The connecting plate 82 extends into the accommodating cavity and is welded and fixed to the skirt plate 4. At this time, the embedded part 8 is set as a structure with a T-shaped vertical cross-section as a whole, and in the actual production and processing process, the embedded plate 81 and the connecting plate 82 can be set as a whole, which is convenient for production and processing while improving the connection strength.

[0049] Specifically, one end of the embedded part 8 is fixed to the outer tank 5, and the other end is connected to other structures for pulling and fixing. In this process, by setting the embedded plate 81, the contact area with the outer tank 5 is increased, thereby reducing the force per unit area of ​​the embedded plate 81. At the same time, at the contact position between the embedded plate 81 and the connecting plate 82, 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.

[0050] Furthermore, in the actual production and assembly process, in order to ensure the strength of the gap 6 and avoid convection of cold and hot air flows at the gap 6, the gap 6 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.

[0051] In the present application, the primary corrugated plate 3 can be configured as any suitable structure.

[0052] refer to Figure 1 and Figure 2 As shown in FIG. 1 , in an exemplary embodiment provided in the present application, the primary corrugated plate 3 includes an upper primary shield 31 and a lower primary shield 32, a sealing ring plate 33 is provided between the upper primary shield 31 and the lower primary shield 32, and the sealing ring plate 33 is provided on a side of the primary corrugated plate 3 close to the outer tank 5. The secondary corrugated plate 7 is fixedly connected to the sealing ring plate 33.

[0053] Based on the above-mentioned embodiment of the present application, the main corrugated plate 3 is divided into an upper main shield 31 and a lower main shield 32, and the two are connected by a sealing ring plate 33. On the one hand, the setting of the sealing ring plate 33 facilitates the fixation with the secondary corrugated plate 7, and on the other hand, the upper main shield 31 and the lower main shield 32 are connected by the sealing ring plate 33 to ensure the overall sealing shielding effect of the main corrugated plate 3. In the specific assembly process, the upper main shield 31 and the sealing ring plate 33, and the lower main shield 32 and the sealing ring plate 33 can be fixed by welding or the like. At this time, the welding method can not only strengthen the connection between the sealing ring plate 33 and the upper main shield 31 and the lower main shield 32, but also strengthen the sealing effect of the connection position.

[0054] Further, refer to Figure 3 As shown in , in some embodiments of the present application, the secondary corrugated plate 7 and the lower main shield 32 enclose a first sealing area 71 , and the upper main shield 31 cooperates with the skirt plate 4 to enclose a third sealing area 11 .

[0055] Based on the above-mentioned embodiment of the present application, the upper main shield 31 cooperates with the skirt plate 4 to form the third sealing area 11, and the first sealing area 71, the second sealing area 72 and the third sealing area 11 are independent of each other, so as to perform modular sealing on the entire membrane enclosure system. At this time, even if a leak occurs at a certain position of the main corrugated plate 3, the leaked liquefied gas can be limited to a single sealing area as much as possible, thereby reducing the impact on other areas, preventing more serious leakage of liquefied gas as much as possible, and improving the safety of the liquefied gas storage tank when in use.

[0056] Specifically, when the liquefied gas storage tank is used, the outer tank 5 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 3 leaks, the liquefied gas in the tank will leak from the main corrugated plate 3 to the outer tank 5. In the absence of a thermal corner protection structure, the liquefied gas will leak inward from the main corrugated plate 3, and then leak from the gap 6 to the outer tank 5, thereby damaging the outer tank 5 of the concrete structure, causing leakage of the liquefied gas storage tank.

[0057] With the above arrangement of the present application, when the main corrugated plate 3 is damaged and leaks, the liquefied gas stored in the tank body will flow from the main corrugated plate 3 to the outer tank 5. At this time, if the liquefied gas leakage position is located at the part directly opposite to the lower insulation module 2, the leaked liquefied gas will be blocked by the secondary corrugated plate 7, thereby sealing the leaked liquefied gas in the first sealing area 71, preventing it from further leaking to the gap 6. When the liquefied gas leakage position is located at the part directly opposite to the upper insulation module 1, the leaked liquefied gas will be blocked by the connection between the skirt plate 4 and the secondary corrugated plate 7, sealing the leaked liquefied gas in the third sealing area 11, preventing it from leaking to the gap 6.

[0058] In summary, the partition structure composed of the skirt plate 4 and the secondary corrugated plate 7 separates and forms a mutually independent first sealing area 71, a second sealing area 72 and a third sealing area 11, thereby improving the sealing effect of the gap 6 position in the internal film structure of the liquefied gas storage tank and reducing the possibility of leakage of the liquefied gas storage tank.

[0059] Further, in some embodiments of the present application, the sealing ring plate 33 may partially overlap with the upper main shield 31 and be welded and fixed to the upper main shield 31. The sealing ring plate 33 may partially overlap with the lower main shield 32 and be welded and fixed to the lower main shield 32.

[0060] Based on the above-mentioned embodiments of the present application, by setting the sealing ring plate 33 and the upper main shield 31 to partially overlap, the contact area between the two is increased, so as to enhance the sealing effect of the contact position between the two when the two are connected. Fixing them by welding can not only ensure the connection strength of the connection position between the two, but also ensure the sealing effect of the contact position between the two. Similarly, by setting the sealing ring plate 33 and the lower main shield 32 to partially overlap, the sealing effect of the contact position between the two is increased. Connecting and fixing the two by welding can ensure the connection strength and enhance the sealing effect of the connection position between the two.

[0061] refer to Figure 4 As shown in , in some embodiments of the present application, a first corrugation 34 may be formed on the upper main shield 31, and a first end cap 35 is provided at the end of the first corrugation 34 close to the sealing ring plate 33. A second corrugation 36 is formed on the lower main shield 32, and a second end cap 37 is provided at the end of the second corrugation 36 close to the sealing ring plate 33.

[0062] Based on the above-mentioned embodiments of the present application, a certain amount of deformable margin is reserved on the upper main shield 31 by forming the first corrugation 34, so that the upper main shield 31 can better cope with the shrinkage deformation caused by temperature changes, and the first end cap 35 is provided to seal the end of the first corrugation 34 to prevent liquefied gas from leaking from the end of the first corrugation 34. Similarly, a certain amount of deformable margin is reserved for the lower main shield 32 by providing the second corrugation 36, and the second end cap 37 is provided to seal the end of the second corrugation 36.

[0063] In some embodiments of the present application, the secondary corrugated plate 7 can be configured as any suitable structure, and any suitable connection method can be selected between the secondary corrugated plate 7 and the skirt plate 4 .

[0064] refer to Figure 2 As shown in , in some embodiments of the present application, one end of the skirt plate 4 close to the secondary corrugated plate 7 may partially overlap with the secondary corrugated plate 7 , and the skirt plate 4 may be welded and fixed to the secondary corrugated plate 7 .

[0065] Based on the above-mentioned embodiments of the present application, by setting the end of the skirt plate 4 to overlap with the corrugated plate part, the contact area of ​​the connection position between the two is increased, thereby enhancing the sealing effect of the contact position between the two when the two are connected. Fixing them by welding can not only ensure the connection strength of the connection position between the two, but also ensure the sealing effect of the contact position between the two. In summary, the sealing effect of the connection position between the skirt plate 4 and the secondary corrugated plate 7 is strengthened by the above-mentioned setting, thereby enhancing the overall sealing effect of the second sealing area 72.

[0066] refer to Figure 2 As shown in , in some embodiments of the present application, the secondary corrugated plate 7 may include a first plate body 73 and a second plate body 74 , one end of the second plate body 74 is fixedly connected to the sealing ring plate 33 , and the other end is connected to the first plate body 73 .

[0067] Based on the above-mentioned embodiment of the present application, the secondary corrugated plate 7 is specifically divided into a first plate body 73 and a second plate body 74, and the end of the second plate body 74 is connected to the sealing ring plate 33 to enclose the first sealing area 71. In the specific assembly process, the end of the second plate body 74 can be welded and fixed to the sealing ring plate 33, which can not only ensure the connection strength between the two, but also enhance the sealing effect of the connection position between the two.

[0068] Furthermore, in some embodiments of the present application, a third corrugation 75 is formed on the first plate body 73 , and a third end cap 76 is formed at an end of the third corrugation 75 close to the second plate body 74 .

[0069] Based on the above-mentioned embodiments of the present application, a certain deformation margin is reserved for the secondary corrugated plate 7 by forming the third corrugation 75 on the first plate body 73. At the same time, the provision of the third end cap 76 can seal the third corrugation 75 and enhance the sealing effect of the second sealing area 72.

[0070] Specifically, when the secondary corrugated plate 7 is connected to the sealing ring plate 33, one end of the second plate body 74 is extended and welded to the sealing ring plate 33. At this time, at least a portion of the second plate body 74 extends in the direction of the sealing ring plate 33, that is, in the radial direction of the outer tank 5. At this time, the skirt plate 4 is located in the gap 6 and also extends in the radial direction of the outer tank 5, so that the end of the skirt plate 4 overlaps with the upper portion of the second plate body 74 and is welded to be fixed.

[0071] In addition, it should be noted that the present application only defines the structures of the main corrugated plates 3 and the secondary corrugated plates 7 corresponding to the upper insulation module 1 and the lower insulation module 2 in the membrane enclosure system, and any suitable setting method can be selected for the specific structure of the upper insulation module 1 and the lower insulation module 2.

[0072] refer to Figure 1As shown in , in some embodiments of the present application, the upper insulation module 1 may include a first insulation layer 12, which is disposed between the upper main shield 31 and the inner wall of the outer tank 5. The lower insulation module 2 may include a second insulation layer 21, which is disposed between the secondary corrugated plate 7 and the inner wall of the outer tank 5. At the same time, a third insulation layer 22 may also be disposed between the lower main shield 32 and the secondary corrugated plate 7.

[0073] Based on the above-mentioned embodiments of the present application, a single-layer insulation structure is formed by the first insulation layer 12 at the position of the upper insulation module 1, and a second insulation layer 21 and a third insulation layer 22 are cooperated at the position of the lower insulation module 2 to form a double-layer insulation structure corresponding to the double-layer shielding structure, thereby specifically improving the insulation effect of the bottom area of ​​the tank.

[0074] Specifically, in actual use, the first insulation layer 12 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.

[0075] In summary, reference Figures 1 to 4 As shown in , when the hot corner protection structure is assembled, the embedded part 8 is first pre-embedded on the inner wall of the outer tank 5. At the same time, the first insulation layer 12 and the second insulation layer 21 are pre-processed by fixing the polyurethane layer with the plywood on both sides. Then, the second insulation layer 21 is fixed to the inner wall of the outer tank 5 by anchoring or the like, and the secondary corrugated plate 7 is fixed to the plywood on which the second insulation layer 21 is away from the inner wall of the outer tank 5 by anchoring or the like. Then, the third insulation layer 22 is installed. The third insulation layer 22 can be specifically set as a structure such as plywood, and fixed to the secondary corrugated plate 7 by anchoring or the like. At this point, the lower insulation module 2 is fixed.

[0076] Then, the skirt plate 4 is fixed by welding one end of the skirt plate 4 to the connecting plate 82 in the embedded part 8, and the other end is welded to the second plate body 74 on the corrugated plate. At this time, the skirt plate 4 and the secondary corrugated plate 7 enclose the second sealing area 72, thereby sealing the gap 6 in the second sealing area 72.

[0077] Then, the installation of the upper insulation module 1 is started. The pre-processed first insulation layer 12 is fixed to the inner wall of the outer tank 5 by anchoring with anchor rods or the like, and the fixing of the upper insulation module 1 is completed.

[0078] Finally, the sealing ring plate 33 is welded and fixed to the end of the second plate body 74 of the secondary corrugated plate 7, and the upper main shield 31 and the lower main shield 32 are installed at the positions corresponding to the upper insulation module 1 and the lower insulation module 2 respectively, and the ends of the upper main shield 31 and the lower main shield 32 are welded and fixed to the sealing ring plate 33 respectively.

[0079] In addition, it should be noted that in the present application, when the skirt board 4 is assembled and fixed, in order to facilitate stable support of the skirt board 4 during the fixing process, a filling support such as resin putty 9 can be arranged between the skirt board 4 and the lower insulation layer. At the same time, a horizontal plywood 91 can be arranged between the resin putty 9 and the skirt board 4 to ensure the balance when supporting the skirt board 4.

[0080] According to a second aspect of the present application, a liquefied gas storage tank is provided, which includes an outer tank 5 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 5.

[0081] Based on the above-mentioned embodiments of the present application, the liquefied gas storage tank provided by the present application includes the above-mentioned thermal corner protection structure. Through the setting of the above-mentioned thermal corner protection structure, the gap 6 between the upper insulation module 1 and the lower insulation module 2 is sealed separately in the second sealing area 72 by separating the first sealing area 71, the second sealing area 72 and the third sealing area 11 independently of each other between the main corrugated plate 3 and the outer tank 5. At this time, even if the main corrugated plate 3 leaks, it can also prevent the liquefied gas from directly leaking through the gap 6 to the outer tank 5 to cause damage to the outer tank 5 to a certain extent, thereby improving the safety of the liquefied gas storage tank.

[0082] In addition, it should be noted that the liquefied gas storage tanks in this application may include various types of storage tanks including liquefied natural gas storage tanks and liquefied petroleum gas storage tanks. At the same time, in the specific construction process, different shielding and insulation materials can be selected according to the different storage requirements of the stored liquefied gas, and different thickness dimensions can be set. The specific setting can be based on the actual situation, and this application does not make specific restrictions on this.

[0083] 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.

[0084] 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.

[0085] 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; A skirt plate, one end of which is connected to the inner wall of the outer tank, and the other end of which extends along the gap toward the main corrugated plate; A secondary corrugated plate, disposed between the primary corrugated plate and the lower insulation module; The secondary corrugated plate extends and is connected to the primary corrugated plate to separate a first sealing area between the secondary corrugated plate and the primary corrugated plate. The skirt plate is connected to the secondary corrugated plate to enclose the lower insulation module and form a second sealing area. The gap is located in the second sealing area.

2. The thermal corner protection structure according to claim 1, characterized in that: The main corrugated plate comprises an upper main shield and a lower main shield, a sealing ring plate is arranged between the upper main shield and the lower main shield, and the sealing ring plate is arranged on a side of the main corrugated plate close to the outer tank; The secondary corrugated plate is fixedly connected to the sealing ring plate.

3. The thermal corner protection structure according to claim 2, characterized in that: The secondary corrugated plate and the lower main shield enclose the first sealing area, and the upper main shield cooperates with the skirt plate to enclose the third sealing area.

4. The thermal corner protection structure according to claim 2, characterized in that: The sealing ring plate overlaps with the upper main shield portion and is welded and fixed to the upper main shield; The sealing ring plate overlaps with the lower main shield portion and is fixed to the lower main shield by welding.

5. The thermal corner protection structure according to claim 2, characterized in that: A first corrugation is formed on the upper main shield, and a first end cap is provided at an end of the first corrugation close to the sealing ring plate; A second corrugation is formed on the lower main shield, and a second end cap is provided at an end of the second corrugation close to the sealing ring plate.

6. The thermal corner protection structure according to claim 1, characterized in that: One end of the skirt plate close to the secondary corrugated plate partially overlaps with the secondary corrugated plate, and the skirt plate is welded and fixed to the secondary corrugated plate.

7. The thermal corner protection structure according to claim 2, characterized in that: The secondary corrugated plate includes a first plate body and a second plate body, one end of the second plate body is fixedly connected to the sealing ring plate, and the other end of the second plate body is connected to the first plate body.

8. The thermal corner protection structure according to claim 7, characterized in that: A third corrugation is formed on the first plate body, and a third end cap is formed on an end of the third corrugation close to the second plate body.

9. The thermal corner protection structure according to claim 7, characterized in that: The upper main shield and the lower main shield are respectively welded and fixed to the sealing ring plate; The second plate body is fixed to the sealing ring plate by welding.

10. A liquefied gas storage tank, characterized in that: The liquefied gas storage tank comprises: outer tank; and, The thermal corner protection structure according to any one of claims 1 to 9, wherein the thermal corner protection structure is arranged in a receiving cavity formed by the outer tank.

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