Corrugated corner plate of liquefied gas storage tank, and liquefied gas storage tank

Abstract

A corrugated corner plate of a liquefied gas storage tank, and a liquefied gas storage tank. The corrugated corner plate (10) comprises: a corrugated corner plate body, which comprises a first plate body (11) and a second plate body (12), wherein a corner portion (126) is formed at the intersection of the first plate body (11) and the second plate body (12), and the included angle between the first plate body (11) and the second plate body (12) is defined as α, where α is greater than 90o but less than 180o; a first corrugation (30), which is formed on the first plate body (11); a second corrugation (40), which is formed on the second plate body (12), the second corrugation (40) and the first corrugation (30) intersecting at the corner portion (126); and an indented portion (50), which is formed at the intersection of the first corrugation (30) and the second corrugation (40). The corrugated corner plate (10) has severe material deformation in the indented portion (50), thereby ensuring the strength and stability of the corrugated corner plate (10), improving the adaptability to an environment, and providing a feasible implementation means for sealed connection of a tank body.

Description

Corrugated corner plate of liquefied gas storage tank and liquefied gas storage tank TECHNICAL FIELD

[0001] The application belongs to the technical field of liquefied gas storage equipment, and particularly relates to a corrugated corner plate of a liquefied gas storage tank and the liquefied gas storage tank. BACKGROUND

[0002] The Chinese government attaches great importance to the development and utilization of clean energy. Liquefied gas (such as liquefied natural gas, abbreviated as LNG) as a clean and efficient fossil energy plays an important role in the national energy structure adjustment and clean and low-carbon development strategy. In accordance with the national "double carbon" goal (i.e. achieving carbon emission peak by 2030 and carbon neutrality by 2060), LNG as a transitional energy helps to reduce carbon emissions during the energy transition and plays an important role in achieving this goal.

[0003] During transportation, some liquefied gases need large transport ships and land storage devices. The storage of liquefied gas mainly adopts tank storage. For some liquefied gases such as LNG, the construction of the storage tank is difficult in terms of complex design requirements, strict material standards, safety reliability, environmental adaptability, regulatory compliance, and cost control.

[0004] The corrugated plates constituting the storage tank and the ship cabin need to maintain good airtightness and deformation resistance. The corrugated corner plate serves to connect the side wall corrugated plate and the bottom corrugated plate of the tank body, while ensuring the airtightness of the connection and meeting the working conditions under specific environmental requirements, i.e. having high environmental adaptability. Therefore, the structure, shape and forming quality of the corrugated corner plate are particularly important. However, the smoothness at the intersection of the existing corrugated corner plate, the uniformity in the thickness direction, and the overall strength and reliability of the corrugated plate need to be improved.

[0005] Therefore, a corrugated corner plate is needed to alleviate or solve the above problems to some extent. SUMMARY

[0006] In view of the above at least one technical problem existing in the prior art, the embodiments of the present application provide a corrugated corner plate of a liquefied gas storage tank and a liquefied gas storage tank.

[0007] The technical scheme adopted by the embodiments of the present application is: a corrugated corner plate of a liquefied gas storage tank, comprising:

[0008] A corrugated corner plate body comprises a first plate body and a second plate body, an intersection of the first plate body and the second plate body forms a corner portion, an included angle between the first plate body and the second plate body is α, wherein 90°<α<180°;

[0009] A first corrugation is formed on the first plate body;

[0010] A second corrugation is formed on the second plate body, the second corrugation intersects with the first corrugation at the corner portion;

[0011] A concave-pressed portion is formed at the intersection of the first corrugation and the second corrugation.

[0012] In an optional embodiment, the first plate body comprises a first plate part and a third plate part, the first corrugation is formed at the intersection of the first plate part and the third plate part, the intersection of the first corrugation and the first plate part and the third plate part respectively smoothly transitions and extends along a plane; and / or

[0013] The second plate body comprises a second plate part and a fourth plate part, the second corrugation is formed at the intersection of the second plate part and the fourth plate part, the intersection of the second corrugation and the second plate part and the fourth plate part respectively smoothly transitions and extends along a plane; and / or

[0014] The intersection of the concave-pressed portion and the first corrugation, the second corrugation, the first plate body and the second plate body all smoothly transitions; and / or

[0015] The intersection of the corner portion and the first plate body and the second plate body all smoothly transitions.

[0016] In an optional embodiment, the cross-sectional shape of the first corrugation and the second corrugation perpendicular to the extending direction of the corrugation is the same; and / or

[0017] The cross-sectional shape of the first corrugation and the second corrugation is both circular arch shape; and / or

[0018] The arch height of the first corrugation and the second corrugation is equal; the arch width of the first corrugation and the second corrugation is equal.

[0019] In an optional embodiment, the transition fillets of the intersection of the two corrugations and the concave-pressed portion and the bottom circular arc of the concave-pressed portion respectively define a first planar area and a second planar area.

[0020] In an optional embodiment, the first planar area and the second planar area are both trapezoidal shape; and / or

[0021] The first planar area and the second planar area are mirror-symmetric about the central interface sandwiched therebetween.

[0022] In an optional embodiment, the concave-pressing portion comprises the first planar region, the second planar region, a transition fillet at each of the two corrugations, a first side surface and a second side surface at each of the two plate bodies, and a transition fillet at each of the two transition fillets between the bottom arc of the concave-pressing portion and the first side surface and the second side surface.

[0023] In an optional embodiment, the first plate portion and the third plate portion are symmetric about an interface at a first center line of a ridge of the first corrugation determined by the longitudinal direction D2 and the height direction D3; and / or

[0024] the second plate portion and the fourth plate portion are symmetric about an interface at a second center line of a ridge of the second corrugation determined by the longitudinal direction D2 and the height direction D3;

[0025] wherein the first plate surface of the first plate portion and the third plate surface of the third plate portion are both planar but not coplanar; the second plate surface of the second plate portion and the fourth plate surface of the fourth plate portion are both planar but not coplanar; and the first plate portion, the second plate portion, the third plate portion, and the fourth plate portion are all upwardly curved along their respective normal directions relative to the lateral direction D1.

[0026] In an optional embodiment, the first plate portion and the second plate portion are not mirror-symmetric about a central interface between them; and / or

[0027] the third plate portion and the fourth plate portion are not mirror-symmetric about a central interface between them.

[0028] In an optional embodiment, the transition fillets at each of the two corrugations are outwardly protruding in a direction perpendicular to the extension of the corrugation; and / or

[0029] the transition fillets at each of the two transition fillets between the bottom arc of the concave-pressing portion and the first side surface and the second side surface are outwardly protruding in a direction perpendicular to the extension of the corrugation.

[0030] In an optional embodiment, the radii of the transition fillets at the interface between the first plate portion and the second plate portion, the radii of the transition fillets at the interface between the third plate portion and the fourth plate portion, and the radii of the transition fillets at the interface between the two corrugations and the four plate portions are all equal; and / or

[0031] the radii of the transition fillets at the interface between the two corrugations and the first side surface and the second side surface, the radii of the transition fillets between the bottom arc of the concave-pressing portion and the first side surface and the second side surface, and the radii of the transition fillets between the first side surface and the second side surface are all equal; and / or

[0032] The first and second planar regions each equal the radius of the fillet between two corrugations.

[0033] A liquefied gas storage tank comprising the corrugated corner panel of any of the preceding embodiments.

[0034] Compared with the prior art, the corrugated corner panel provided by the application has a sharp material deformation at a special part (a concave pressing part), which ensures the strength and stability of the corrugated corner panel, fully realizes the structural role of the corrugated corner panel in a tank body of a liquefied gas storage tank on land or on a ship, and provides a feasible implementation mode for the sealed connection of the tank body, and at the same time, greatly meets the performance requirements under the working environmental conditions.

[0035] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory in nature and are not intended to limit the present application.

[0036] The summary of various implementations or examples of the technology described in this application is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0037] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. The drawings are intended to illustrate various embodiments in accordance with the application and as such do not limit the scope of the application, nor do they necessarily disclose all features of the application. Wherever possible, like reference numerals have been used throughout the drawings to refer to identical or similar components that perform similar functions. Such embodiments are illustrative rather than limiting of the present application.

[0038] FIG. 1 is a perspective view of a corrugated corner panel according to an embodiment of the application.

[0039] FIG. 2 is a projection of the corrugated corner panel of FIG. 1 in a projection plane defined by a transverse direction and a height direction.

[0040] FIG. 3 is a projection of the corrugated corner panel of FIG. 1 in a projection plane defined by a longitudinal direction and a height direction.

[0041] FIG. 4 is a cross-sectional view of FIG. 3 taken along line E-E.

[0042] FIG. 5 is a cross-sectional view of FIG. 3 taken along line F-F.

[0043] Reference numerals: 10 - corrugated corner plate; 11 - first plate body; 111 - first plate portion; 112 - third plate portion; 113 - third transition round corner; 12 - second plate body; 121 - second plate portion; 122 - fourth plate portion; 123 - fourth transition round corner; 124 - fifth transition round corner; 125 - sixth transition round corner; 126 - corner portion; 30 - first corrugation; 31 - first corrugation ridge; 32 - first center line; 40 - second corrugation; 41 - second corrugation ridge; 42 - second center line; 50 - indentation portion; 51 - bottom arc; 52 - first transition round corner; 53 - first planar region; 54 - center interface; 55 - first side face; 56 - second side face; 57 - second transition round corner; 58 - seventh transition round corner. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0045] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0046] In order to keep the following description of the embodiments of the present application clear and concise, detailed descriptions of known functions and known components are omitted in the present application.

[0047] First of all, it should be pointed out that the direction terms and position terms mentioned in the present application are only exemplary descriptions and not limiting descriptions. The position and orientation descriptions of the components should be understood as relative positions and not absolute positions. Among them, the position and orientation descriptions of the corrugated corner plate 10 should be understood with reference to the positions and orientations of the components shown in Figures 1-5, wherein in the position descriptions of two components, the "transverse direction" is represented by D1, the "longitudinal direction" is represented by D2, and the "height direction" is represented by D3. The three directions are perpendicular to each other. When describing the corrugated corner plate 10, the normal direction is introduced, wherein N1 represents the normal direction of the first plate surface, N2 represents the normal direction of the second plate surface, N3 represents the normal direction of the third plate surface, and N4 represents the normal direction of the fourth plate surface.

[0048] It should be noted that when describing the appearance of the corrugated corner plate 10, the height direction D3 is represented as the extension direction of the first corrugation 30, and the transverse direction D1 is represented as the axis direction of the bottom arc 51 of the concave pressing portion 50; therefore, the longitudinal direction D2 is represented as the direction perpendicular to the plane defined by the transverse direction D1 and the height direction D3.

[0049] The embodiment of the present application provides a corrugated corner plate 10 of a liquefied gas storage tank. The liquefied gas storage tank can be a storage tank for storing liquefied gas on land or on a ship, and the corrugated corner plate 10 is a component of the tank body of the storage tank. The liquefied gas includes but is not limited to liquefied natural gas.

[0050] As shown in Figures 1-5, the corrugated corner plate 10 of the embodiment of the present application includes a corrugated corner plate body, a first corrugation 30, a second corrugation 40, and a concave pressing portion 50.

[0051] As shown in Figure 1, the corrugated corner plate body includes a first plate body 11 and a second plate body 12, and the intersection of the first plate body 11 and the second plate body 12 forms a corner portion 126. The included angle between the first plate body 11 and the second plate body 12 is α, wherein 90° < α < 180°, that is, the corner angle of the corrugated corner plate 10 is 90°-180°. The first corrugation 30 is formed on the first plate body 11. The second corrugation 40 is formed on the second plate body 12, and the second corrugation 40 intersects with the first corrugation 30 at the corner portion 126. The concave pressing portion 50 is formed at the intersection of the first corrugation 30 and the second corrugation 40. The corrugated corner plate 10 of the present application has a severe material deformation at a special part (the concave pressing portion 50), which ensures the strength and stability of the corrugated corner plate 10, and also exhibits good elasticity, shrinkage ability and tension.

[0052] In some embodiments, as shown in FIG. 1, the first plate body 11 comprises a first plate portion 111 and a third plate portion 112, and the first corrugation 30 is formed at the intersection of the first plate portion 111 and the third plate portion 112. The intersection of the first corrugation 30 and the first plate portion 111 and the third plate portion 112 respectively smoothly transitions and extends along a plane.

[0053] In some embodiments, as shown in FIG. 1, the second plate body 12 comprises a second plate portion 121 and a fourth plate portion 122, and the second corrugation 40 is formed at the intersection of the second plate portion 121 and the fourth plate portion 122. The intersection of the second corrugation 40 and the second plate portion 121 and the fourth plate portion 122 respectively smoothly transitions and extends along a plane.

[0054] In some embodiments, the intersection of the concave-pressed portion 50 and the first corrugation 30, the second corrugation 40, the first plate body 11 and the second plate body 12 all smoothly transitions.

[0055] In some embodiments, the intersection of the corner portion 126 and the first plate body 11 and the second plate body 12 all smoothly transitions, i.e. the intersection of the first plate portion 111 and the second plate portion 121 smoothly transitions, and the intersection of the third plate portion 112 and the fourth plate portion 122 smoothly transitions.

[0056] The corrugated corner plate 10 of the present application has a smooth overall shape and a regular macroscopic shape, so as to ensure the strength and stability of the structure.

[0057] Preferably, the included angle of the first plate portion 111 and the second plate portion 121 is 135°, and the included angle of the third plate portion 112 and the fourth plate portion 122 is 135°.

[0058] In some embodiments, as shown in FIG. 4 and FIG. 5, the first corrugation 30 and the second corrugation 40 have the same cross-sectional shape taken by a plane perpendicular to the extending direction of the corrugation, so as to make the shape more regular. The cross-sectional shape of the first corrugation 30 and the second corrugation 40 can both be circular arch shape. The arch height H3 of the first corrugation 30 and the arch height H4 of the second corrugation 40 are equal, and the arch width W7 of the first corrugation 30 and the arch width W8 of the second corrugation 40 are equal. Further, the arch width dimension can be 1.5-2.5 times the arch height dimension. Such arrangement can make the stress variation and strain distribution variation of the corrugated corner plate 10 be in the optimal state.

[0059] In some embodiments, as shown in FIG. 2, the first transition fillet 52 at the intersection of the two corrugations and the concave-pressed portion 50 respectively defines a first planar area 53 and a second planar area with the bottom arc 51 of the concave-pressed portion 50. In FIG. 2, only the first planar area 53 defined between the first transition fillet 52 at the intersection of the first corrugation 30 and the concave-pressed portion 50 and the bottom arc 51 of the concave-pressed portion 50 is shown.

[0060] Further, the first planar region 53 and the second planar region are both in the shape of a trapezoid, i.e., two trapezoidal planes are formed; the trapezoidal plane is narrow at the top and wide at the bottom, so that the intersection with other parts can be smoothly transitioned. The first planar region 53 and the second planar region are mirror-symmetric about the central interface sandwiched by the two. Therefore, the dimensions of the two trapezoidal planes are equal. The two planar regions are transition parts of the two corrugations and the middle intersection part, and the two corrugations are mirror-symmetric about the 135-degree central interface; therefore, the two planar regions are naturally shaped. After the corrugated corner plate is shaped, the two corrugations are mirror-symmetric, and the two planar regions are also mirror-symmetric. Before use and during use, stress bias caused by the asymmetry of the two planar regions will not occur, and in turn, different internal stresses will not be generated on the two corrugations to cause deformation.

[0061] Optionally, the concave pressing part 50 is mirror-symmetric about the central interface 54 sandwiched by the two trapezoidal planes of the concave pressing part 50. However, the entire corrugated corner plate 10 is not mirror-symmetric about the central interface 54 sandwiched by the two trapezoidal planes of the concave pressing part 50. The entire corrugated corner plate 10 is symmetric about the interface at the center line of the two corrugations determined by the longitudinal direction D2 and the height direction D3.

[0062] In some embodiments, the concave pressing part 50 includes the first planar region 53, the second planar region, the first transition fillet 52 at the intersection of the two corrugations with the concave pressing part 50, the first side surface 55 and the second side surface 56 at the connection of the concave pressing part 50 with the two plate bodies, and the second transition fillet 57 at the connection of the bottom arc 51 of the concave pressing part 50 with the first side surface 55 and the second side surface 56. The concave pressing part 50 is smooth and fluent, which ensures its energy absorption and release effect in the application environment.

[0063] In some embodiments, the first plate part 111 and the third plate part 112 are symmetric about the interface at the first center line 32 of the first corrugation ridge 31 of the first corrugation 30 determined by the longitudinal direction D2 and the height direction D3. In some embodiments, the second plate part 121 and the fourth plate part 122 are symmetric about the interface at the second center line 42 of the second corrugation ridge 41 of the second corrugation 40 determined by the longitudinal direction D2 and the height direction D3. That is, the corrugated corner plate body includes two pairs (the first plate part 111 and the third plate part 112 constitute a pair, and the second plate part 121 and the fourth plate part 122 constitute a pair) of plate parts symmetric about the plane defined by the longitudinal direction D2 and the height direction D3.

[0064] The first plate surface of the first plate portion 111 and the third plate surface of the third plate portion 112 are both planar but not in the same plane (or, the first plate portion 111 and the third plate portion 112 are both flat plates but not coplanar). The second plate surface of the second plate portion 121 and the fourth plate surface of the fourth plate portion 122 are both planar but not in the same plane (or, the second plate portion 121 and the fourth plate portion 122 are both flat plates but not coplanar). The first plate portion 111, the second plate portion 121, the third plate portion 112 and the fourth plate portion 122 are all upwardly curved relative to the lateral direction D1 along the respective normal directions of the planes. The first plate portion 111 and the third plate portion 112 have the same upwardly curved height relative to the lateral direction D1, see Fig. 4. The second plate portion 121 and the fourth plate portion 122 have the same upwardly curved height relative to the lateral direction D1, see Fig. 5. The included angle between the outer normal N1 of the first plate surface and the outer normal N3 of the third plate surface and the included angle between the outer normal N2 of the second plate surface and the outer normal N4 of the fourth plate surface are both constant, but the two angles are not equal, which is manifested in space as that the two pairs of planes (plate portions) have different upwardly curved heights. Therefore, the first plate portion 111 and the second plate portion 121 are not mirror-symmetric about the central interface 54 between the two trapezoidal planes of the concave-pressed portion 50; the third plate portion 112 and the fourth plate portion 122 are not mirror-symmetric about the central interface 54 between the two trapezoidal planes of the concave-pressed portion 50.

[0065] By designing the plate portions to be curved, it is convenient to form an approximately circular tank body with the corrugated plates when assembled into a liquefied gas storage tank; and the different curved heights facilitate installation and welding.

[0066] In some embodiments, the first transition fillets 52 at the intersections of the two corrugations with the concave-pressed portion 50 each protrude outward in a direction perpendicular to the extension of the corrugations. The second transition fillets 57 at which the first side surface 55 and the second side surface 56 are connected to the bottom circular arc 51 of the concave-pressed portion 50 each protrude outward in a direction perpendicular to the extension of the corrugations.

[0067] In some embodiments, the fourth transition fillet 123 at the intersection of the first plate portion 111 with the second plate portion 121 has a radius equal to that of the fifth transition fillet 124 at the intersection of the third plate portion 112 with the fourth plate portion 122, and the third transition fillet 113 at the intersection of the two corrugations with the four plate portions and the sixth transition fillet 125 each have a radius equal to that of the fourth transition fillet 123 and the fifth transition fillet 124. The fourth transition fillet 123 and the fifth transition fillet 124 are the corner portions 126 between the first plate body 11 and the second plate body 12. Making the radii of the above-mentioned transition fillets consistent facilitates the shaping of the corner corrugated plate and the aesthetic appearance of the product after forming.

[0068] The radius of the first transition round corner 52 at the intersection of the two corrugations and the concave portion 50 (i.e. the first side surface 55 and the second side surface 56) is equal to the radius of the second transition round corner 57 between the bottom arc 51 of the concave portion 50 and the first side surface 55 and the second side surface 56, and the radius of the transition round corner between the first side surface 55 and the second side surface 56. The first planar area 53 and the second planar area are equal to the radius of the seventh transition round corner 58 between the two corrugations.

[0069] It can be understood that the transition round corners mentioned in the present application are all smooth transition round corners.

[0070] The concave portion 50 of the corrugated corner plate 10 of the embodiments of the present application has a severe material deformation, but the intersections of the curved surfaces are all smooth transitions, so the overall shape of the corrugated corner plate 10 is smooth, which greatly improves the surface quality of the component; the smooth connection and transition between the planar surfaces, the precise fixed included angle between the planar surfaces, and the stability and processing feasibility of the component are increased; and the corrugated corner plate 10 provides a stable performance, strong environmental adaptability and novel appearance for the liquefied natural gas storage tank on land and on ships.

[0071] The embodiments of the present application also provide a liquefied gas storage tank, which comprises the corrugated corner plate 10 of any of the above embodiments. Through the cooperation of the corrugated corner plate 10 with the corrugated plate and other components, a tank body for storing liquefied gas is assembled.

[0072] The liquefied gas storage tank can be used to store, for example, liquid hydrogen, liquefied natural gas, etc.

[0073] The above description is intended to be illustrative and not restrictive, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more aspects thereof) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A corrugated corner panel for a liquefied gas storage tank, characterized by, The corrugated corner plate body comprises a first plate body and a second plate body, an intersection of the first plate body and the second plate body forms a corner portion, and an included angle between the first plate body and the second plate body is α, wherein 90°<α<180°. A first corrugation is formed on the first plate body. A second corrugation is formed on the second plate body, and the second corrugation intersects with the first corrugation at the corner portion. A concave-pressing portion is formed at the intersection of the first corrugation and the second corrugation. The first plate body comprises a first plate part and a third plate part, the first corrugation is formed at the intersection of the first plate part and the third plate part, the intersection of the first corrugation and the first plate part and the third plate part respectively smoothly transitions and extends along a plane, and / or 2. The corrugated corner panel for a liquefied gas storage tank of claim 1, wherein The second plate body comprises a second plate part and a fourth plate part, the second corrugation is formed at the intersection of the second plate part and the fourth plate part, the intersection of the second corrugation and the second plate part and the fourth plate part respectively smoothly transitions and extends along a plane, and / or The intersection of the concave-pressing portion and the first corrugation, the second corrugation, the first plate body and the second plate body all smoothly transitions, and / or The intersection of the corner portion and the first plate body and the second plate body all smoothly transitions. The cross-sectional shape of the first corrugation and the second corrugation perpendicular to the extending direction of the corrugation is the same, and / or 3. The corrugated corner panel for a liquefied gas storage tank of claim 1, wherein The cross-sectional shape of the first corrugation and the second corrugation is a circular arch shape, and / or The arch height of the first corrugation and the second corrugation is equal, and the arch width of the first corrugation and the second corrugation is equal. The transition fillets of the intersection of the two corrugations and the concave-pressing portion respectively and the bottom circular arc of the concave-pressing portion define a first planar area and a second planar area.

4. The corrugated corner panel for a liquefied gas storage tank of claim 2, wherein The first planar area and the second planar area are both in a trapezoidal shape, and / or 5. The corrugated corner panel for a liquefied gas storage tank of claim 4, wherein The first planar area and the second planar area are mirror-symmetric about the central interface sandwiched by the two planar areas. The concave-pressing portion comprises the first planar area, the second planar area, the transition fillets of the intersection of the two corrugations and the concave-pressing portion, the first side surface and the second side surface of the concave-pressing portion respectively connected with the two plate bodies, and the transition fillets of the connection of the bottom circular arc of the concave-pressing portion and the first side surface and the second side surface.

6. The corrugated corner panel for a liquefied gas storage tank of claim 4, wherein The first plate part and the third plate part are symmetric about the interface at the first center line of the ridge of the first corrugation determined by the longitudinal direction D2 and the height direction D3, and / or 7. The corrugated corner panel for a liquefied gas storage tank of claim 2, wherein The second plate part and the fourth plate part are symmetric about the interface at the second center line of the ridge of the second corrugation determined by the longitudinal direction D2 and the height direction D3, Wherein, the first plate surface of the first plate part and the third plate surface of the third plate part are both planes but not coplanar, the second plate surface of the second plate part and the fourth plate surface of the fourth plate part are both planes but not coplanar, and the first plate part, the second plate part, the third plate part and the fourth plate part all tilt upward along the respective normal direction of the plane relative to the transverse direction D1. The first plate part and the second plate part are not mirror-symmetric about the central interface sandwiched by the two plate parts, and / or 8. The corrugated corner panel of a liquefied gas storage tank according to claim 7, characterized in that, ​ The third plate portion and the fourth plate portion are not mirror-symmetric about the central interface sandwiched therebetween.

9. The corrugated corner panel of a liquefied gas storage tank according to claim 6, characterized in that, The transition fillets at the intersections of the two corrugations with the concave portions each protrude outward in a direction perpendicular to the extension of the corrugations; and / or The transition fillets at the intersections of the first side surface and the second side surface with the bottom arc portions of the concave portions each protrude outward in a direction perpendicular to the extension of the corrugations.

10. The corrugated corner panel of a liquefied gas storage tank according to claim 9, characterized in that, The radii of the transition fillets at the intersections of the first plate portion with the second plate portion, the third plate portion with the fourth plate portion, and the two corrugations with the four plate portions are all equal; and / or The radii of the transition fillets at the intersections of the two corrugations with the first side surface and the second side surface, the transition fillets between the bottom arcs of the concave portions and the first side surface and the second side surface, and the transition fillets between the first side surface and the second side surface are all equal; and / or The radii of the transition fillets between the first planar region and the second planar region and the two corrugations are all equal.

11. A liquefied gas storage tank characterized by comprising: A corrugated corner plate comprising any one of claims 1 to 10.

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