A thermal corner protection structure and a liquefied gas storage tank

Abstract

This application relates to a thermal corner protection structure and a liquefied gas storage tank. The thermal corner protection structure is arranged in the accommodation cavity formed by the outer tank. The thermal corner protection structure includes an upper thermal insulation module, a lower thermal insulation module, a skirt plate, and a secondary corrugated plate. The upper thermal insulation module and the lower thermal insulation module are arranged on the inner wall of the outer tank in the vertical direction, and there is a gap between the two. The outer sides of the upper thermal insulation module and the lower thermal 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. 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. The skirt plate is connected to the secondary corrugated plate to enclose the lower thermal insulation module and form a second sealing area, and the gap is located in the second sealing area. The thermal corner protection structure provided by this application can protect the gap position between the upper and lower parts of the thin film enclosure structure and reduce the possibility of tank leakage.

Description

Technical Field

[0001] This application relates to the technical field of liquefied gas storage tanks, and specifically, to a thermal corner protection structure and a liquefied gas storage tank. Background Art

[0002] Liquefied gas storage tanks generally include full containment tanks and membrane tanks. Among them, the membrane tank uses a membrane enclosure structure as the shielding layer and thermal insulation layer inside the tank body. Compared with the full containment tank, the internal space of the membrane tank occupies less, so the internal volume of the storage tank can be effectively increased.

[0003] In the prior art, during the construction of the membrane tank, the pressure and temperature that the tank wall needs to bear are different at different depths of the tank body. Therefore, during construction, usually with a five-meter distance from the bottom of the tank as the demarcation line, the membrane enclosure structure is divided into upper and lower parts. Based on the different pressures and temperature environments received by the upper and lower parts, it is necessary to set the structures of the two parts differently. And this will cause voids at the junction position between the two due to different assembly methods and structures. At this time, once the outermost shielding layer is damaged, the liquefied gas will leak along the voids to the concrete appearance, causing the outer tank to be damaged, and finally resulting in the leakage of the storage tank.

[0004] Therefore, there is an urgent need to provide a protection structure that can protect the void position between the upper and lower parts of the membrane enclosure structure and reduce the possibility of the storage tank leaking due to the leakage of materials from the void position to the outer tank when the shielding layer is damaged. Summary of the Invention

[0005] The purpose of this application is to provide a thermal corner protection structure and a liquefied gas storage tank that can protect the void position between the upper and lower parts of the membrane enclosure structure and reduce the possibility of the storage tank leaking due to the leakage of materials from the void position to the outer tank when the shielding layer is damaged.

[0006] To achieve the above purpose, in the first aspect of this application, a thermal corner protection structure is provided. The thermal corner protection structure is arranged in the accommodation cavity formed by the outer tank. The thermal corner protection structure includes an upper thermal insulation module, a lower thermal insulation module, a skirt plate, and a secondary corrugated plate. The upper thermal insulation module and the lower thermal insulation module are arranged on the inner wall of the outer tank in the vertical direction, and there is a void between the two. The outer sides of the upper thermal insulation module and the lower thermal 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 void towards the direction close to the main corrugated plate. The secondary corrugated plate is arranged between the main corrugated plate and the lower thermal 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. The skirt plate is connected to the secondary corrugated plate to enclose the lower thermal insulation module and form a second sealing area, and the void is located in the second sealing area.

[0007] Based on the above embodiments of the present application, during the construction of the liquefied gas storage tank, by dividing the thin film enclosure structure into an upper heat insulation module and a lower heat insulation module at intervals of voids, the upper heat insulation module and the lower heat insulation module can be set to different structures, so as to specifically strengthen the heat insulation effect in the bottom area of the storage tank. Specifically, a secondary corrugated plate is arranged at the position where the lower heat insulation module is located, so as to cooperate with the main corrugated plate to form a shielding structure of a double-layer corrugated plate, strengthening the heat insulation and shielding effects in the bottom area of the storage tank. During this process, the secondary corrugated plate and the main corrugated plate are connected to separate a first sealing area, the skirt plate and the secondary corrugated plate are connected to separate a second sealing area, and the void is sealed in the second sealing area to achieve the sealing protection of the void position. At this time, even if the main corrugated plate leaks and the liquefied gas flows towards the outer tank, it will be blocked by the enclosure structure formed by the connection of structures such as the secondary corrugated plate and the skirt plate, thereby reducing the possibility of the liquefied gas flowing out of the outer tank and causing damage to the outer tank, and reducing the possibility of leakage of the liquefied gas storage tank. Further, by separately forming the first sealing area and the second sealing area to separately protect the inside of the lower heat insulation module, the heat insulation and shielding effects at the position where the lower heat insulation module is located are further improved, and the overall safety of the liquefied gas storage tank is improved.

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

[0009] Based on the above embodiments of the present application, by dividing the main corrugated plate into an upper main shield and a lower main shield, and connecting the two through a sealing ring plate. On the one hand, the arrangement of the sealing ring plate facilitates the fixation with the secondary corrugated plate. On the other hand, by connecting the upper main shield and the lower main shield through the sealing ring plate, the overall sealing and shielding effect of the main corrugated plate is ensured.

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

[0011] Based on the above embodiments of the present application, by cooperating the upper main shield and the skirt plate to enclose 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 as to perform modular sealing on the overall thin film enclosure system. At this time, even if a certain position of the main corrugated plate leaks, the leaked liquefied gas can be limited in a single sealing area as much as possible, thereby reducing the impact on other areas and preventing the liquefied gas from leaking more seriously as much as possible, and improving the safety during the use of the liquefied gas storage tank.

[0012] In some embodiments, the sealing ring plate partially overlaps with the upper main shield and is fixedly welded to the upper main shield. The sealing ring plate partially overlaps with the lower main shield and is fixedly welded to the lower main shield.

[0013] Based on the above embodiments of the present application, by setting the sealing ring plate to partially overlap with the upper main shield, the contact area between the two is increased, thereby enhancing the sealing effect at the contact position between the two when they are connected. And by welding to fix them, not only can the connection strength at the connection position of the two be ensured, but also the sealing effect at the contact position of the two can be ensured. Similarly, by setting the sealing ring plate to partially overlap with the lower main shield, the sealing effect at the contact position between the two is increased. And by welding to connect and fix the two, while ensuring the connection strength, the sealing effect at the connection position of the two is strengthened.

[0014] In some embodiments, 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.

[0015] Based on the above embodiments of the present application, by forming the first corrugation, a certain amount of deformable margin is left on the upper main shield, so that the upper main shield can better cope with the shrinkage deformation caused by temperature change, 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, by setting the second corrugation, a certain amount of deformable margin is left for the lower main shield, and at the same time, 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 and the secondary corrugated plate are fixedly connected by welding.

[0017] Based on the above embodiments of the present application, by setting the end of the skirt plate to partially overlap with the corrugated plate, the contact area at the connection position between the two is increased, thereby enhancing the sealing effect at the contact position between the two when they are connected. And by welding to fix them, not only can the connection strength at the connection position of the two be ensured, but also the sealing effect at the contact position of the two can be ensured. In summary, through the above settings, the sealing effect at the connection position between the skirt plate and the secondary corrugated plate is strengthened, and thus the sealing effect of the overall second sealing area is enhanced.

[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 embodiments of the present application, by specifically dividing the secondary corrugated plate into a first plate body and a second plate body, the end of the second plate body is connected to the sealing ring plate to enclose the first sealing area.

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

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

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

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

[0024] According to the second aspect of the present application, a liquefied gas storage tank is provided. The liquefied gas storage tank includes an outer tank and the above-mentioned thermal corner protection structure, and the thermal corner protection structure is arranged in the accommodation cavity formed by the outer tank.

[0025] Based on the above 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 thermal corner protection structure, by separating independent first sealing area, second sealing area and third sealing area between the main corrugated plate and the outer tank, the gap between the upper thermal insulation module and the lower thermal insulation module is separately sealed in the second sealing area. At this time, even if the main corrugated plate leaks, it can, to a certain extent, prevent the liquefied gas from directly leaking through the gap to the outer tank part and causing damage to the outer tank, 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 specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present application, but do not constitute a limitation to the present application. In the drawings:

[0028] Figure 1 is a schematic cross-sectional view of the thermal corner protection structure provided by the embodiment of the present application.

[0029] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0030] Figure 3 is a schematic view of the structures of the first sealing area, the second sealing area and the third sealing area in the thermal corner protection structure provided by the embodiment of the present application.

[0031] Figure 4 is a schematic view of the main corrugated plate in the thermal corner protection structure provided by the embodiment of the present application.

[0032] 1. Upper adiabatic module; 11. Third sealing area; 12. First adiabatic layer; 2. Lower adiabatic module; 21. Second adiabatic layer; 22. Third adiabatic 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 plate; 5. Outer tank; 6. Void; 7. Secondary 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 part; 81. Embedded plate; 82. Connecting plate; 9. Resin mortar; 91. Horizontal plywood. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0036] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present application, it should be noted that, unless otherwise stated, the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Based on the above embodiments of the present application, during the construction of the liquefied gas storage tank, by dividing the thin film enclosure structure into the upper heat insulation module 1 and the lower heat insulation module 2 at intervals of the gap 6, the upper heat insulation module 1 and the lower heat insulation module 2 can be set to different structures, and then the heat insulation effect of the bottom area of the storage tank can be strengthened specifically. Specifically, a secondary corrugated plate 7 is arranged at the position where the lower heat insulation module 2 is located, so as to cooperate with the main corrugated plate 3 to form a shielding structure of double-layer corrugated plates, strengthening the heat insulation and shielding effects on the bottom area of the storage tank.

[0043] During this process, the secondary corrugated plate 7 and the main corrugated plate 3 are connected to divide the first sealing area 71, the skirt plate 4 and the secondary corrugated plate 7 are connected to divide the second sealing area 72, and the gap 6 is sealed in the second sealing area 72 to achieve the sealing protection of the position of the gap 6. At this time, even if the main corrugated plate 3 leaks and the liquefied gas flows towards the outer tank 5, it will be blocked by the enclosure structure formed by the connection of structures such as the secondary corrugated plate 7 and the skirt plate 4, thereby reducing the possibility of the liquefied gas flowing out of the outer tank 5 and causing damage to the outer tank 5, and reducing the possibility of leakage of the liquefied gas storage tank.

[0044] Furthermore, by forming the first sealing area 71 and the second sealing area 72 respectively, the interior of the lower heat insulation module 2 is separated and protected, thereby further improving the heat insulation and shielding effects at the position where the lower heat insulation module 2 is located, and enhancing the overall safety of the liquefied gas storage tank.

[0045] In addition, it should also 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 direct connection of the skirt plate 4 to the inner wall of the outer tank 5 and the indirect fixation of the skirt plate 4 to the inner wall of the outer tank 5, that is, the skirt plate 4 does not directly contact 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.

[0046] For example, as shown in Figure 3 , in some embodiments of the present application, embedded parts 8 can be arranged on the inner wall of the outer tank 5. The embedded parts 8 are pre-embedded on the inner wall of the outer tank 5 during the pouring process of the outer tank 5 and are 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 other means, so as to achieve the indirect fixation between the skirt plate 4 and the inner wall of the outer tank 5.

[0047] Through the above settings, the embedded parts 8 are pre-embedded in the inner wall of the outer tank 5, which can not only ensure the connection strength with the outer tank 5, but also avoid damaging the inner wall of the outer tank 5 by means such as embedding expansion screws. At the same time, by setting the embedded parts 8, the assembly of the skirt plate 4 can be facilitated. The skirt plate 4 does not need to be pre-fixed to the inner wall of the outer tank 5, and the skirt plate 4 can be connected to the embedded parts 8 after the lower heat insulation module 2 is assembled, thereby reducing the construction difficulty.

[0048] Further referring to Figure 3As shown in the figure, 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 fixedly welded to the skirt plate 4.

[0049] Based on the above embodiments of the present application, a specific structure of the 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 accommodation cavity and is fixedly welded to the skirt plate 4. At this time, the overall structure of the embedded part 8 is set to a T-shaped vertical cross-section. In the actual production and processing process, the embedded plate 81 and the connecting plate 82 can be integrally arranged, which not only facilitates production and processing but also improves the connection strength.

[0050] 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 on 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 or other methods, which can be specifically selected according to the actual situation, and the present application does not make specific limitations on this.

[0051] Furthermore, in the actual production and assembly process, in order to ensure the strength of the gap 6 and avoid the convection of cold and hot air currents at the gap 6, the gap 6 can be filled with materials such as glass wool, which can be specifically selected according to the actual situation, and the present application does not make specific limitations on this.

[0052] In the present application, the main corrugated plate 3 can be set to any suitable structure.

[0053] Reference Figure 1 and Figure 2 As shown in the figure, in an exemplary embodiment provided by the present application, the main corrugated plate 3 includes an upper main shield 31 and a lower main shield 32. A sealing ring plate 33 is arranged between the upper main shield 31 and the lower main shield 32, and the sealing ring plate 33 is arranged on the side of the main corrugated plate 3 close to the outer tank 5. The secondary corrugated plate 7 is fixedly connected to the sealing ring plate 33.

[0054] Based on the above embodiments 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. On the other hand, the upper main shield 31 and the lower main shield 32 are connected through the sealing ring plate 33 to ensure the overall sealing and shielding effect of the main corrugated plate 3. In the specific assembly process, the upper main shield 31 and the sealing ring plate 33, as well as the lower main shield 32 and the sealing ring plate 33, can be fixed by welding or other means. 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 enhance the sealing effect of the connection position.

[0055] Further, referring to Figure 3 as shown in, in some embodiments of the present application, a first sealing area 71 is enclosed between the secondary corrugated plate 7 and the lower main shield 32, and the upper main shield 31 cooperates with the skirt plate 4 to enclose a third sealing area 11.

[0056] Based on the above embodiments of the present application, the upper main shield 31 and the skirt plate 4 cooperate to enclose the third sealing area 11. 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 overall thin-film 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 and preventing the liquefied gas from leaking more severely, and improving the safety of the liquefied gas storage tank during use.

[0057] Specifically, when the liquefied gas storage tank is in use, the outer tank 5 is usually formed into a cylindrical tank structure by concrete pouring, and the bottom and top of the tank also need to be closed. When the main corrugated plate 3 leaks, the liquefied gas in the tank will leak from the main corrugated plate 3 towards the outer tank 5. In the case where the thermal corner protection structure is not provided, the liquefied gas will leak inward from the main corrugated plate 3, and then leak to the outer tank 5 from the gap 6, thereby damaging the concrete structure of the outer tank 5 and causing the liquefied gas storage tank to leak.

[0058] However, through the above settings of the present application, when the main corrugated plate 3 is damaged and leaks, the liquefied gas stored in the tank will flow from the main corrugated plate 3 towards the outer tank 5. At this time, if the leakage position of the liquefied gas is located in the part opposite to the lower insulation module 2, the leaked liquefied gas will be blocked by the secondary corrugated plate 7, so as to enclose the leaked liquefied gas in the first sealing area 71 and prevent it from further leaking to the gap 6. When the leakage position of the liquefied gas is located in the part 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, and the leaked liquefied gas will be enclosed in the third sealing area 11 to prevent it from leaking to the gap 6.

[0059] In summary, the partition structure formed by connecting structures such as the skirt plate 4 and the secondary corrugated plate 7 divides to form independent first, second, and third sealed areas 71, 72, and 11, thereby enhancing the sealing effect at the position of the gap 6 in the internal thin film structure of the liquefied gas storage tank and reducing the possibility of leakage of the liquefied gas storage tank.

[0060] Furthermore, in some embodiments of the present application, the sealing ring plate 33 can partially overlap with the upper main shield 31 and be fixedly welded to the upper main shield 31. The sealing ring plate 33 can partially overlap with the lower main shield 32 and be fixedly welded to the lower main shield 32.

[0061] Based on the above embodiments of the present application, by setting partial overlap between the sealing ring plate 33 and the upper main shield 31, the contact area between the two is increased, thereby enhancing the sealing effect at the contact position when the two are connected. And by welding for fixation, not only can the connection strength at the connection position of the two be ensured, but also the sealing effect at the contact position of the two can be ensured. Similarly, by setting partial overlap between the sealing ring plate 33 and the lower main shield 32, the sealing effect at the contact position of the two is increased. And by welding for connection and fixation, while ensuring the connection strength, the sealing effect at the connection position of the two is strengthened.

[0062] Reference Figure 4 As shown in [reference], in some embodiments of the present application, a first corrugation 34 can 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.

[0063] Based on the above embodiments of the present application, by forming the first corrugation 34, a certain amount of deformable margin is left on the upper main shield 31, so that the upper main shield 31 can better cope with the shrinkage deformation caused by temperature change, and the setting of the first end cap 35 can seal the end of the first corrugation 34 to prevent liquefied gas from leaking from the end of the first corrugation 34. Similarly, by setting the second corrugation 36, a certain amount of deformable margin is left for the lower main shield 32, and at the same time, the second end cap 37 is set to seal the end of the second corrugation 36.

[0064] In some embodiments of the present application, the secondary corrugated plate 7 can be set to any suitable structure, and any suitable connection method can be selected between the secondary corrugated plate 7 and the skirt plate 4.

[0065] Reference Figure 2 As shown in [reference], in some embodiments of the present application, one end of the skirt plate 4 close to the secondary corrugated plate 7 can partially overlap with the secondary corrugated plate 7, and the skirt plate 4 can be fixedly welded to the secondary corrugated plate 7.

[0066] Based on the above embodiments of the present application, by arranging the end of the skirt plate 4 to partially overlap with the corrugated plate, the contact area at the connection position between the two is increased, thereby enhancing the sealing effect at the contact position between the two when they are connected. And by welding to fix them, not only can the connection strength at the connection position between the two be ensured, but also the sealing effect at the contact position between the two can be ensured. In summary, through the above arrangement, the sealing effect at the connection position between the skirt plate 4 and the secondary corrugated plate 7 is strengthened, thereby enhancing the overall sealing effect of the second sealing area 72.

[0067] Reference Figure 2 As shown in the figure, 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.

[0068] Based on the above embodiments of the present application, by specifically dividing the secondary corrugated plate 7 into the first plate body 73 and the second plate body 74, 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. At this time, not only can the connection strength between the two be ensured, but also the sealing effect at the connection position between the two can be strengthened.

[0069] Further, 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 the end of the third corrugation 75 close to the second plate body 74.

[0070] Based on the above embodiments of the present application, by forming the third corrugation 75 on the first plate body 73, a certain amount of deformable margin is left for the secondary corrugated plate 7. At the same time, the setting of the third end cap 76 can close the third corrugation 75 and strengthen the sealing effect of the second sealing area 72.

[0071] Specifically, when the secondary corrugated plate 7 is connected to the sealing ring plate 33, one end of the second plate body 74 extends and is welded and fixed to the sealing ring plate 33. At this time, at least a part of the second plate body 74 extends in the direction towards the sealing ring plate 33, that is, in the radial direction of the outer tank 5. And 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 a part of the second plate body 74 and is welded and fixed.

[0072] In addition, it should also be noted that in the present application, only the structures of some parts such as the main corrugated plate 3 and the secondary corrugated plate 7 corresponding to the upper heat insulation module 1 and the lower heat insulation module 2 in the thin film enclosure system are defined, and for the specific structures of the upper heat insulation module 1 and the lower heat insulation module 2, any suitable setting method can be selected.

[0073] Reference Figure 1As shown, in some embodiments of the present application, the upper insulation module 1 may include a first insulation layer 12, and the first insulation layer 12 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, and the second insulation layer 21 is disposed between the secondary corrugated plate 7 and the inner wall of the outer tank 5. Meanwhile, a third insulation layer 22 may also be disposed between the lower main shield 32 and the secondary corrugated plate 7.

[0074] Based on the above embodiments of the present application, a single-layer insulation structure is formed through the first insulation layer 12 at the position of the upper insulation module 1, while at the position of the lower insulation module 2, the second insulation layer 21 and the third insulation layer 22 cooperate to form a double-layer insulation structure corresponding to the double-layer shielding structure, thereby specifically enhancing the insulation effect in the bottom area of the storage tank.

[0075] Specifically, in actual use, the first insulation layer 12 may include a polyurethane layer, and plywood may be disposed on both sides of the polyurethane layer for easy 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 set according to the insulation requirements. For example, it may be set to include only plywood. It can be specifically set according to the actual situation, and the present application does not make specific limitations thereto.

[0076] In summary, referring to Figures 1 to 4 As shown, when assembling the thermal corner protection structure, first, the embedded part 8 is pre-buried on the inner wall of the outer tank 5. Meanwhile, the first insulation layer 12 and the second insulation layer 21 are pre-fabricated by fixing the polyurethane layer and plywood on both sides. Subsequently, the second insulation layer 21 is fixed to the inner wall of the outer tank 5 by means of anchoring, etc., and the secondary corrugated plate 7 is fixed to the plywood of the second insulation layer 21 facing away from the inner wall of the outer tank 5 by means of anchoring, etc. Subsequently, the third insulation layer 22 is installed. The third insulation layer 22 may be specifically set as a structure such as plywood and is fixed to the secondary corrugated plate 7 by means of anchoring, etc. Thus, the installation of the lower insulation module 2 is completed.

[0077] Subsequently, the skirt plate 4 is fixed. One end of the skirt plate 4 is fixed to the connecting plate 82 part of the embedded part 8 by welding, and the other end is welded to the second plate body 74 part of the corrugated plate. At this time, the skirt plate 4 and the secondary corrugated plate 7 enclose a second sealing area 72, thereby enclosing the gap 6 within the second sealing area 72.

[0078] Subsequently, the installation of the upper insulation module 1 is started. The pre-fabricated first insulation layer 12 is fixed to the inner wall of the outer tank 5 by means of anchoring with bolts, etc., and thus the installation of the upper insulation module 1 is completed.

[0079] 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. Then, the upper main shield 31 and the lower main shield 32 are respectively installed at positions corresponding to the upper heat insulation module 1 and the lower heat insulation module 2, and the end parts of the upper main shield 31 and the lower main shield 32 are respectively welded and fixed to the sealing ring plate 33.

[0080] In addition, it should also be noted that when the skirt plate 4 is assembled and fixed in this application, in order to facilitate the stable support of the skirt plate 4 during the fixing process, filling supports such as resin mortar 9 can also be provided between the skirt plate 4 and the lower heat insulation layer. At the same time, a horizontal plywood 91 can also be provided between the resin mortar 9 and the skirt plate 4 to ensure the balance when supporting the skirt plate 4.

[0081] According to the second aspect of the present application, a liquefied gas storage tank is provided. The liquefied gas storage tank includes an outer tank 5 and the above-mentioned thermal corner protection structure, and the thermal corner protection structure is arranged in the accommodation cavity formed by the outer tank 5.

[0082] Based on the above 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 thermal corner protection structure, by separating independent first sealing area 71, second sealing area 72 and third sealing area 11 between the main corrugated plate 3 and the outer tank 5, the gap 6 between the upper heat insulation module 1 and the lower heat insulation module 2 is separately sealed in the second sealing area 72. At this time, even if the main corrugated plate 3 leaks, it can, to a certain extent, prevent the liquefied gas from directly leaking through the gap 6 to the outer tank 5 part and causing damage to the outer tank 5, thereby improving the safety of the liquefied gas storage tank.

[0083] In addition, it should also be noted that the liquefied gas storage tank in this application can include various types of storage tanks such as liquefied natural gas storage tanks and liquefied petroleum gas storage tanks. At the same time, different shields and heat insulation materials can be selected according to the different storage requirements of the stored liquefied gas during the specific construction process, and different thickness dimensions can be set. It can be specifically set according to the actual situation, and the present application does not make specific limitations on this.

[0084] The preferred embodiments of the present application have been 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 scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0085] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present application does not separately describe various possible combination methods.

[0086] In addition, any combination can be made among various different embodiments of the present application, as long as it does not violate the idea of the present application, and it should also be regarded as the content disclosed by 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, and the gap is located in the second sealing area; The primary corrugated plate comprises an upper primary shield and a lower primary shield. The secondary corrugated plate and the lower primary shield enclose the first sealing area. The upper primary shield cooperates with the skirt plate to enclose a third sealing area.

2. The thermal corner protection structure according to claim 1, characterized in that: A sealing ring plate is provided between the upper main shield and the lower main shield, and the sealing ring plate is provided 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 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.

4. 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.

5. 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.

6. 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.

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

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

9. 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 8, wherein the thermal corner protection structure is arranged in a receiving cavity formed by the outer tank.

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