A corrugated corner plate for a liquefied gas storage tank and a liquefied gas storage tank

Abstract

The present application provides a corrugated corner plate for a liquefied gas storage tank and a liquefied gas storage tank. The corrugated corner plate includes: a corrugated corner plate body, which includes a first plate body and a second plate body, and a corner portion is formed at the intersection of the first plate body and the second plate body, and the included angle between the first plate body and the second plate body is α, where 90° < α < 180°; a first corrugation, which is formed on the first plate body; a second corrugation, which is formed on the second plate body, and the second corrugation intersects with the first corrugation at the corner portion; a concave portion, which is formed at the intersection of the first corrugation and the second corrugation. The corrugated corner plate of the present application has severe material deformation at the concave portion, ensuring the strength and stability of the corrugated corner plate, improving the environmental adaptability, and providing a feasible implementation method for the airtight connection of the tank body.

Description

Technical Field

[0001] This application belongs to the technical field of liquefied gas storage equipment, and particularly relates to corrugated corner plates and liquefied gas storage tanks for onshore and on-board liquefied gas storage tanks. Background Art

[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, occupies an important position in the national energy structure adjustment and clean and low-carbon development strategy. In accordance with the country's "dual carbon" goal (that is, achieving carbon peak emissions by 2030 and carbon neutrality by 2060), LNG, as a transitional energy source, helps to reduce carbon emissions during the energy transition period and plays an important role in achieving this goal.

[0003] During the transportation of liquefied gas, some require large transportation ships and onshore storage devices. The storage of liquefied gas mainly adopts tank storage. For some liquefied gases, such as LNG, the construction difficulties of its storage tanks lie in multiple aspects such as complex design requirements, strict material standards, safety and reliability, environmental adaptability, regulatory compliance, and cost control. With the development of technology and the accumulation of experience, these challenges are being gradually overcome.

[0004] The corrugated plates that make up the storage tank and the ship's cabin need to maintain good airtightness and anti-deformation ability. The corrugated corner plate should play a role in connecting the corrugated plate on the side wall of the tank body and the corrugated plate at the bottom of the tank body, and at the same time, ensure the airtightness of the connection, and meet the working conditions under specific environmental requirements, that is, have high environmental adaptability; therefore, the structure, shape, and forming quality of the corrugated corner plate are particularly important. At present, the smoothness at the corrugation intersection, the uniformity in the thickness direction, and the overall strength and reliability of the corrugated plate of the existing corrugated corner plates all need to be strengthened.

[0005] Therefore, it is necessary to provide a corrugated corner plate to alleviate or solve the above problems to a certain extent. Summary of the Invention

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

[0007] The technical solution adopted in the embodiments of this application is: A corrugated corner plate for a liquefied gas storage tank, comprising:

[0008] A corrugated corner plate main body, which includes a first plate body and a second plate body. The intersection of the first plate body and the second plate body forms a corner part. The included angle between the first plate body and the second plate body is α, where 90° < α < 180°;

[0009] The first corrugation, which is formed on the first plate body;

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

[0011] The concave portion, which is formed at the intersection of the first corrugation and the second corrugation.

[0012] In an alternative embodiment, the first plate body includes a first plate portion and a third plate portion, and the first corrugation is formed at the intersection of the first plate portion and the third plate portion; the first corrugation smoothly transitions and extends along a plane respectively at the junctions with the first plate portion and the third plate portion; and / or

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

[0014] The concave portion smoothly transitions at the junctions with the first corrugation, the second corrugation, the first plate body, and the second plate body; and / or

[0015] The corner portion smoothly transitions at the junctions with the first plate body and the second plate body.

[0016] In an alternative embodiment, the cross-sectional shapes of the first corrugation and the second corrugation in a direction perpendicular to the corrugation extension direction are the same; and / or

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

[0018] The arch heights of the first corrugation and the second corrugation are equal; the arch widths of the first corrugation and the second corrugation are equal.

[0019] In an alternative embodiment, first planar regions and second planar regions are defined respectively between the transition fillets at the junctions of the two corrugations with the concave portion and the bottom arc of the concave portion.

[0020] In an alternative embodiment, both the first planar region and the second planar region are trapezoidal in shape; and / or

[0021] The first planar region and the second planar region are mirror-symmetrical about the central interface sandwiched between them.

[0022] In an alternative embodiment, the recessed portion includes the first planar region, the second planar region, the transition rounded corners at the intersections of the two corrugations with the recessed portion respectively, the first side surface and the second side surface at the connections of the recessed portion with the two plate bodies respectively, and the transition rounded corners at the connections of the bottom arc of the recessed portion with the first side surface and the second side surface.

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

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

[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; the first plate portion, the second plate portion, the third plate portion and the fourth plate portion are all tilted upward relative to the transverse direction D1 along their respective plane normal directions.

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

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

[0028] In an alternative embodiment, the transition rounded corners at the intersections of the two corrugations with the recessed portion respectively protrude outward in the direction perpendicular to the extension of the corrugations; and / or

[0029] the transition rounded corners at the connections of the first side surface and the second side surface with the bottom arc portion of the recessed portion respectively protrude outward in the direction perpendicular to the extension of the corrugations.

[0030] In an alternative embodiment, the radii of the transition rounded corners at the intersection of the first plate portion and the second plate portion, the radii of the transition rounded corners at the intersection of the third plate portion and the fourth plate portion, and the radii of the transition rounded corners at the intersections of the two corrugations with the four plate portions respectively are all equal; and / or

[0031] the radii of the transition rounded corners at the intersections of the two corrugations with the first side surface and the second side surface respectively, the radii of the transition rounded corners between the bottom arc of the recessed portion and the first side surface and the second side surface respectively, and the radii of the transition rounded corners between the first side surface and the second side surface are all equal; and / or

[0032] The radius of the transition fillet between the two corrugations is everywhere equal to that of the first planar region and the second planar region, respectively.

[0033] A liquefied gas storage tank includes the corrugated corner plate described in any of the above embodiments.

[0034] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows: The corrugated corner plate provided by the present application has severe material deformation at a special part (the concave part), ensuring the strength and stability of the corrugated corner plate; fully realizing its structural role in the tank body of the liquefied gas storage tank stored on land and on ships, providing a feasible implementation method for the airtight connection of the tank body; at the same time, greatly meeting the performance requirements under its working environment conditions.

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

[0036] An overview of various implementations or examples of the technology described in the present application is not a full disclosure of the entire scope of the disclosed technology or all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the drawings, which are not necessarily to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate, by way of example and not limitation, various embodiments and are used in conjunction with the description and the claims to explain the disclosed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and are not intended as an exhaustive or exclusive embodiment of the apparatus or method.

[0038] Figure 1 is a perspective view of the corrugated corner plate of the embodiment of the present application.

[0039] Figure 2 is Figure 1 the projection of the shown corrugated corner plate in the projection plane defined by the transverse direction and the height direction.

[0040] Figure 3 is Figure 1 the projection of the shown corrugated corner plate in the projection plane defined by the longitudinal direction and the height direction.

[0041] Figure 4 is Figure 3 the sectional view taken along line E-E in

[0042] Figure 5 is Figure 3 the sectional view taken along line F-F in

[0043] Reference numerals:

[0044] 10 - Corrugated corner plate; 11 - First plate body; 111 - First plate portion; 112 - Third plate portion; 113 - Third transition fillet; 12 - Second plate body; 121 - Second plate portion; 122 - Fourth plate portion; 123 - Fourth transition fillet; 124 - Fifth transition fillet; 125 - Sixth transition fillet; 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 - Concave portion; 51 - Bottom arc; 52 - First transition fillet; 53 - First planar region; 54 - Central interface; 55 - First side; 56 - Second side; 57 - Second transition fillet; 58 - Seventh transition fillet. Detailed implementation mode

[0045] 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 clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0046] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. The "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0047] 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 this application.

[0048] First of all, it should be noted that the directional terms and position terms mentioned in this application are only exemplary descriptions rather than limiting descriptions. The descriptions of the positions and orientations of the components should be understood as relative positions rather than absolute positions. Among them, the descriptions of the position and direction of the corrugated corner plate 10 should refer to Figures 1-5Understand the positions and directions of the components shown. Among the position descriptions of the two components, the "lateral 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 pairwise. When describing the corrugated corner plate 10, the normal direction is introduced, where 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.

[0049] It should be noted that when describing the appearance of the corrugated corner plate 10, the height direction D3 is represented as the extending direction of the first corrugation 30, and the lateral direction D1 is represented as the axial direction of the bottom arc 51 of the recessed part 50; therefore, the longitudinal direction D2 is represented as the direction perpendicular to the plane defined by the lateral direction D1 and the height direction D3.

[0050] The embodiment of the present application provides a corrugated corner plate 10 for 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 serves as a component of the tank body of the storage tank. The liquefied gas includes but is not limited to liquefied natural gas.

[0051] As Figures 1 to 5 shown, the corrugated corner plate 10 of the embodiment of the present application includes a corrugated corner plate main body, a first corrugation 30, a second corrugation 40, and a recessed part 50.

[0052] As Figure 1 shown, the corrugated corner plate main body includes a first plate body 11 and a second plate body 12. The intersection of the first plate body 11 and the second plate body 12 forms a corner part 126. The included angle between the first plate body 11 and the second plate body 12 is α, where 90° < α < 180°, that is, the rotation angle of the corrugated corner plate 10 is 90° to 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 part 126. The recessed part 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 severe material deformation at a special part (the recessed part 50), which ensures the strength and stability of the corrugated corner plate 10 and can also exhibit good elasticity, shrinkage ability, and tension.

[0053] In some embodiments, as Figure 1 shown, the first plate body 11 includes a first plate portion 111 and a third plate portion 112. The first corrugation 30 is formed at the intersection of the first plate portion 111 and the third plate portion 112. The first corrugation 30 smoothly transitions at the junctions with the first plate portion 111 and the third plate portion 112 and extends along a plane.

[0054] In some embodiments, as Figure 1As shown, the second plate body 12 includes 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 second corrugation 40 smoothly transitions at the intersections with the second plate portion 121 and the fourth plate portion 122 respectively and extends along a plane.

[0055] In some embodiments, the recessed portion 50 smoothly transitions at the intersections with the first corrugation 30, the second corrugation 40, the first plate body 11, and the second plate body 12.

[0056] In some embodiments, the corner portion 126 smoothly transitions at the intersections with the first plate body 11 and the second plate body 12, that is, there is a smooth transition between the first plate portion 111 and the second plate portion 121, and there is a smooth transition between the third plate portion 112 and the fourth plate portion 122.

[0057] The overall shape of the corrugated corner plate 10 of the present application is smooth, and the shape is regular macroscopically to ensure the strength and stability of its structure.

[0058] Preferably, the included angle between the first plate portion 111 and the second plate portion 121 is 135°; the included angle between the third plate portion 112 and the fourth plate portion 122 is 135°.

[0059] In some embodiments, as Figure 4 and Figure 5 shown, the first corrugation 30 and the second corrugation 40 have the same cross-sectional shape obtained by a plane perpendicular to the corrugation extension direction, making the shape more regular. The cross-sectional shapes of the first corrugation 30 and the second corrugation 40 can both be circular-arch-shaped. The arch height H3 of the first corrugation 30 is equal to the arch height H4 of the second corrugation 40; the arch width W7 of the first corrugation 30 is equal to the arch width W8 of the second corrugation 40. Further, the arch width dimension can be 1.5 to 2.5 times the arch height dimension. Such a setting can make the stress change and strain distribution change of the corrugated corner plate 10 in an optimal state.

[0060] In some embodiments, as shown in the figure, the first transition fillets 52 at the intersections of the two corrugations and the recessed portion 50 respectively define a first planar region 53 and a second planar region with the bottom arc 51 of the recessed portion 50, Figure 2 and only the first planar region 53 defined by the first transition fillet 52 at the intersection of the first corrugation 30 and the recessed portion 50 and the bottom arc 51 of the recessed portion 50 is shown in the figure.

[0061] Furthermore, both the first planar region 53 and the second planar region are trapezoidal in shape, i.e., two trapezoidal planes are formed. The trapezoidal planes are narrower at the top and wider at the bottom, enabling smooth transitions at the intersection parts with other regions related to this planar region. The first planar region 53 and the second planar region are mirror-symmetrical about the central interface sandwiched between them. Therefore, the dimensions of these two trapezoidal planes correspond to each other. These two planar regions are respectively the transition parts between the two corrugations and the intermediate intersection part, and the two corrugations are mirror-symmetrical about the 135-degree central interface. Thus, these two regional planes are naturally formed. After the corrugated corner plate is formed, the two corrugations are mirror-symmetrical, and the two planar regions are also mirror-symmetrical. Before use after pressing and during the use process, stress eccentric loading caused by asymmetry of the two side planar regions will not occur, and thus different internal stresses will not be generated on the two corrugations to cause deformation.

[0062] Optionally, the recessed part 50 is mirror-symmetrical about the central interface 54 sandwiched between the two trapezoidal planes of the recessed part 50. However, the entire corrugated corner plate 10 is not mirror-symmetrical about the central interface 54 sandwiched between the two trapezoidal planes of the recessed part 50. The entire corrugated corner plate 10 is symmetrical about the interface determined by the longitudinal direction D2 and the height direction D3 at the center line of the two corrugations.

[0063] In some embodiments, the recessed part 50 includes a first planar region 53, a second planar region, a first transition fillet 52 at the junction of each of the two corrugations and the recessed part 50, a first side surface 55 and a second side surface 56 at the junction of the recessed part 50 and the two plate bodies respectively, and a second transition fillet 57 at the junction of the bottom arc 51 of the recessed part 50 and the first side surface 55 and the second side surface 56. The recessed part 50 is smooth and fluent, ensuring its function of absorbing and releasing energy in the application environment.

[0064] In some embodiments, the first plate portion 111 and the third plate portion 112 are symmetrical about the interface determined by the longitudinal direction D2 and the height direction D3 at the first center line 32 of the first corrugation ridge 31 of the first corrugation 30. In some embodiments, the second plate portion 121 and the fourth plate portion 122 are symmetrical about the interface determined by the longitudinal direction D2 and the height direction D3 at the second center line 42 of the second corrugation ridge 41 of the second corrugation 40. That is, the main body of the corrugated corner plate includes two pairs (the first plate portion 111 and the third plate portion 112 form a pair, and the second plate portion 121 and the fourth plate portion 122 form a pair) of plate portions that are respectively symmetrical about the plane defined by the longitudinal direction D2 and the height direction D3.

[0065] The first surface of the first plate portion 111 and the third surface of the third plate portion 112 are both flat surfaces but not in the same plane (or it can be understood that the first plate portion 111 and the third plate portion 112 are both flat plates but not coplanar). The second surface of the second plate portion 121 and the fourth surface of the fourth plate portion 122 are both flat surfaces but not in the same plane (or it can be understood that 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 tilted upward relative to the transverse direction D1 along their respective plane normal directions. The tilting heights of the first plate portion 111 and the third plate portion 112 relative to the transverse direction D1 are the same, see Figure 4 . The tilting heights of the second plate portion 121 and the fourth plate portion 122 relative to the transverse direction D1 are the same, see Figure 5 . The angles between the outer normal N1 of the first surface and the outer normal N3 of the third surface, and the angles between the outer normal N2 of the second surface and the outer normal N4 of the fourth surface are both fixed, but these two angles are not equal, which shows that the tilting heights of the two pairs of planes (plate portions) are different in space. Therefore, the first plate portion 111 and the second plate portion 121 are not mirror-symmetrical about the central interface 54 sandwiched by the two trapezoidal planes of the recessed portion 50; the third plate portion 112 and the fourth plate portion 122 are not mirror-symmetrical about the central interface 54 sandwiched by the two trapezoidal planes of the recessed portion 50.

[0066] By designing the plate portions in a tilted form, it is convenient to form an approximately circular tank body by overlapping with the corrugated plates when assembling into a liquefied gas storage tank; and the different tilting heights are convenient for installation and welding.

[0067] In some embodiments, the first transition fillets 52 at the junctions of the two corrugations with the recessed portion 50 protrude outward in the direction perpendicular to the corrugation extension. The second transition fillets 57 where the first side surface 55 and the second side surface 56 are respectively connected to the bottom arc 51 portion of the recessed portion 50 protrude outward in the direction perpendicular to the corrugation extension.

[0068] In some embodiments, the radii of the fourth transition fillets 123 at the junction of the first plate portion 111 and the second plate portion 121 and the radii of the fifth transition fillets 124 at the junction of the third plate portion 112 and the fourth plate portion 122 are equal, and the radii of the third transition fillets 113 and the sixth transition fillets 125 at the junctions of the two corrugations with the four plate portions are all equal; among them, the fourth transition fillets 123 and the fifth transition fillets 124 are the corner portions 126 between the first plate body 11 and the second plate body 12. Making the above-mentioned transition fillet radii the same is convenient for the forming of the corner corrugated plates and the beauty of the product appearance after formation.

[0069] The radius of the first transition fillet 52 at the intersection of the two corrugations and the indentation portion 50 (i.e., the first side surface 55 and the second side surface 56), the radius of the bottom arc 51 of the indentation portion 50, the radius of the second transition fillet 57 between the first side surface 55 and the second side surface 56, and the radius of the transition fillet between the first side surface 55 and the second side surface 56 are all equal. The radius of the seventh transition fillet 58 between the first planar region 53 and the second planar region and the two corrugations is equal everywhere.

[0070] It can be understood that the transition fillets mentioned in this application are all smooth transition fillets.

[0071] Although there is a drastic material deformation in the indentation portion 50 of the corrugated corner plate 10 of the embodiment of this application, the intersections of the respective curved surfaces are all smoothly transitioned. Therefore, the overall shape of the corrugated corner plate 10 is smooth, which greatly improves the surface quality of the component; the respective planar surfaces are also smoothly connected and transitioned, and there is an accurate fixed angle between the respective planar surfaces, which increases the stability and processing feasibility of the component; a corrugated corner plate 10 with stable performance, strong environmental adaptability and novel appearance is provided for onshore and offshore liquefied natural gas storage tanks.

[0072] The embodiment of this application also provides a liquefied gas storage tank, which includes the corrugated corner plate 10 in 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.

[0073] The liquefied gas storage tank can be used to store, for example, liquid hydrogen, liquefied natural gas, etc.

[0074] The above description is intended to be illustrative rather than restrictive, and those of ordinary skill in the art can make changes, modifications, substitutions, 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 it is contemplated that these embodiments can be combined with each other in various combinations or permutations.

Claims

1. A corrugated corner plate for a liquefied gas storage tank, characterized in that: include: A corrugated corner plate body, comprising a first plate body and a second plate body, wherein the intersection of the first plate body and the second plate body forms a corner portion, and the angle between the first plate body and the second plate body is α, wherein 90°<α<180°; a first corrugation formed on the first plate; A second corrugation formed on the second plate body, wherein the second corrugation intersects with the first corrugation at the corner portion; a concave portion formed at the intersection of the first corrugation and the second corrugation; The first plate body includes a first plate portion and a third plate portion, and the first corrugation is formed at the intersection of the first plate portion and the third plate portion; The second plate body includes a second plate portion and a fourth plate portion, and the second corrugation is formed at the intersection of the second plate portion and the fourth plate portion; The transition fillets at the intersection of the two corrugations and the concave portion respectively define a first plane area and a second plane area with the bottom arc of the concave portion; The first plane area and the second plane area are both in a trapezoidal shape; The first plane region and the second plane region are mirror-symmetrical about a central interface sandwiched between the two; The concave portion includes the first planar area, the second planar area, the transition fillet where the two corrugations respectively intersect the concave portion, the first side surface and the second side surface where the concave portion is respectively connected to the two plate bodies, and the transition fillet where the bottom arc of the concave portion is connected to the first side surface and the second side surface.

2. The corrugated corner plate of the liquefied gas storage tank according to claim 1, characterized in that: The intersections of the first corrugation with the first plate portion and the third plate portion are smoothly transitioned and extend along a plane; and / or The intersections of the second corrugation with the second plate portion and the fourth plate portion are smoothly transitioned and extend along a plane; and / or The intersections between the concave portion and the first corrugation, the second corrugation, the first plate body and the second plate body are smoothly transitioned; and / or The corner portion has a smooth transition with the junctions between the first plate body and the second plate body.

3. The corrugated corner plate of a liquefied gas storage tank according to claim 1, characterized in that: The cross-sectional shapes of the first corrugation and the second corrugation perpendicular to the corrugation extending direction are the same; and / or The cross-sections of the first corrugation and the second corrugation are both in the shape of circular arches; and / or The arch heights of the first corrugation and the second corrugation are equal; the arch widths of the first corrugation and the second corrugation are equal.

4. The corrugated corner plate of a liquefied gas storage tank according to claim 1, characterized in that: The first plate portion and the third plate portion are symmetrical about an interface at a first centerline of a ridge of the first corrugation determined by the longitudinal direction D2 and the height direction D3; and / or The second plate portion and the fourth plate portion are symmetrical about an interface at a second centerline of a ridge of the second corrugation determined by the longitudinal direction D2 and the height direction D3; Among them, the first plate surface of the first plate portion and the third plate surface of the third plate portion are both planes but not coplanar; the second plate surface of the second plate portion and the fourth plate surface of the fourth plate portion are both planes but not coplanar; the first plate portion, the second plate portion, the third plate portion and the fourth plate portion are all warped upward relative to the lateral direction D1 along the direction of their respective plane normals.

5. The corrugated corner plate of the liquefied gas storage tank according to claim 4, characterized in that: The first plate portion and the second plate portion are not mirror-symmetrical about a central interface sandwiched between the first plate portion and the second plate portion; and / or The third plate portion and the fourth plate portion are not mirror-symmetrical about a central interface sandwiched between the third plate portion and the fourth plate portion.

6. The corrugated corner plate of a liquefied gas storage tank according to claim 1, characterized in that: The transition fillets at the intersections of the two corrugations and the concave portions protrude outwards in a direction perpendicular to the extension of the corrugations; and / or The transition fillets where the first side surface and the second side surface are respectively connected to the bottom arc portion of the concave portion protrude outward in a direction perpendicular to the extending direction of the corrugations.

7. The corrugated corner plate of a liquefied gas storage tank according to claim 6, characterized in that: The radius of the transition fillet at the intersection of the first plate portion and the second plate portion, the radius of the transition fillet at the intersection of the third plate portion and the fourth plate portion, and the radius of the transition fillet at the intersection of the two corrugations and 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 radii of the transition fillets between the bottom arc of the concave 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 The radii of the first planar area and the second planar area and the transition fillets between the two corrugations are equal everywhere.

8. A liquefied gas storage tank, characterized in that: The invention comprises the corrugated corner panel according to any one of claims 1 to 7.

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