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

Abstract

The invention provides a corrugated corner plate of a liquefied gas storage tank and the liquefied gas storage tank. The corrugated corner plate comprises a corrugated corner plate body, the corrugated corner plate body comprises a first plate body and a second plate body, a corner part is formed at the intersection of the first plate body and the second plate body, and the included angle alpha between the first plate body and the second plate body is 90-degree lt; [alpha] [lt]; 180 degrees; the first corrugation is formed on the first plate body; the second corrugation is formed on the second plate body, and the second corrugation and the first corrugation intersect at the corner part; and an indented portion formed at an intersection of the first corrugation and the second corrugation. According to the corrugated corner plate, the indented part has severe material deformation, so that the strength and the stability of the corrugated corner plate are guaranteed, the environmental adaptability is improved, and a feasible implementation mode is provided for closed connection of the tank body.

Description

Technical Field

[0001] The present application belongs to the technical field of liquefied gas storage equipment, and in particular relates to corrugated corner plates and liquefied gas storage tanks for liquefied gas storage tanks on land and on ships. Background Art

[0002] The Chinese government attaches great importance to the development and utilization of clean energy. As a clean and efficient fossil energy, liquefied gas (such as liquefied natural gas, LNG for short) occupies an important position in the national energy structure adjustment and clean and low-carbon development strategy. According to the country's "dual carbon" goal (i.e., achieving carbon emissions peak by 2030 and carbon neutrality by 2060), LNG, as a transitional energy, helps reduce carbon emissions during the energy transition and plays an important role in achieving this goal.

[0003] During the transportation of liquefied gases, some require large transport ships and land storage facilities. The storage of liquefied gases mainly adopts storage tanks. For some liquefied gases, such as LNG, the construction of storage tanks is difficult due to its 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 gradually being overcome.

[0004] The corrugated plates that make up the storage tanks and cabins need to maintain good airtightness and anti-deformation ability. The corrugated corner plates should play the role of connecting the corrugated plates on the side walls of the tanks and the corrugated plates on the bottom of the tanks. At the same time, they should also ensure the airtightness of the connection and meet the working conditions under specific environmental requirements, that is, they should have high environmental adaptability. Therefore, the structure, shape and forming quality of the corrugated corner plates are particularly important. However, the smoothness of the existing corrugated corner plates at the intersection of the corrugations, the uniformity in the thickness direction, and the overall strength and reliability of the corrugated plates 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 response to at least one of the above-mentioned technical problems existing in the prior art, an embodiment of the present application provides a corrugated corner plate of a liquefied gas storage tank and a liquefied gas storage tank.

[0007] The technical solution adopted in the embodiment of the present application is: a corrugated corner plate of a liquefied gas storage tank, comprising:

[0008] 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°;

[0009] a first corrugation formed on the first plate;

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

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

[0012] In an optional embodiment, the first plate body includes a first plate portion and a third plate portion, the first corrugation is formed at the intersection of the first plate portion and the third plate portion; the intersections of the first corrugation and the first plate portion and the third plate portion are smoothly transitioned and extend along a plane; and / or

[0013] The second plate body includes a second plate portion and a fourth plate portion, the second corrugation is formed at the intersection of the second plate portion and the fourth plate portion; the intersections of the second corrugation and the second plate portion and the fourth plate portion are smoothly transitioned and extend along a plane; and / or

[0014] 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

[0015] The corner portion has a smooth transition with the junctions between the first plate body and the second plate body.

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

[0017] The cross-sections of the first corrugation and the second corrugation are both in the shape of circular arches; 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 optional embodiment, a first plane area and a second plane area are defined between transition fillets at the intersection of the two corrugations and the concave portion and the bottom arc of the concave portion.

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

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

[0022] In an optional embodiment, 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 and the second side 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 and the second side.

[0023] In an optional embodiment, the first plate portion and the third plate portion are symmetrical 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 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;

[0025] 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.

[0026] In an optional embodiment, 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

[0027] 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.

[0028] In an optional embodiment, 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

[0029] 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.

[0030] In an optional embodiment, 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 with the four plate portions are all equal; and / or

[0031] 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

[0032] The radii of the first planar area and the second planar area and the transition fillets between the two corrugations are equal everywhere.

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

[0034] Compared with the prior art, the beneficial effects of the embodiments of the present application are: the corrugated corner plate provided by the present application has drastic material deformation at special positions (concave parts), thereby ensuring the strength and stability of the corrugated corner plate; fully realizing its structural function in the tank body of liquefied gas storage tanks on land and on ships, and providing a feasible implementation method for the closed connection of the tank body; at the same time, it meets the performance requirements under its working environment conditions to a great extent.

[0035] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

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

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

[0038] Figure 1 This is a three-dimensional view of the corrugated corner plate according to an embodiment of the present application.

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

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

[0041] Figure 4 for Figure 3 A cross-sectional view taken along line EE in FIG.

[0042] Figure 5 for Figure 3 A cross-sectional view taken along line FF.

[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 plane area; 54-center interface; 55-first side surface; 56-second side surface; 57-second transition fillet; 58-seventh transition fillet. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] In order to keep the following description of the embodiments of the present application clear and concise, the present application omits detailed descriptions of known functions and known components.

[0048] First of all, it should be noted that the directional terms and position terms mentioned in this application are only exemplary descriptions and not restrictive descriptions. The position and orientation descriptions of the components should be understood as relative positions rather than absolute positions. Figure 1-Figure 5The positions and directions of the components shown in the figure are understood, wherein in the description of the positions of the two components, the "transverse direction" is represented by D1, the "longitudinal direction" is represented by D2, and the "height direction" is represented by D3, and 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.

[0049] 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 lateral direction D1 is represented as the axial direction of the bottom arc 51 of the concave portion 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 of a liquefied gas storage tank, which 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. Liquefied gas includes but is not limited to liquefied natural gas.

[0051] like Figures 1 to 5 As shown, 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 portion 50 .

[0052] like Figure 1 As shown, the main body of the corrugated corner plate includes a first plate body 11 and a second plate body 12, and a corner portion 126 is formed at the intersection of the first plate body 11 and the second plate body 12. The angle between the first plate body 11 and the second plate body 12 is α, wherein 90°<α<180°, that is, the angle of rotation 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 and the first corrugation 30 intersect at the corner portion 126. The concave 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 drastic material deformation at a special position (the concave portion 50), which ensures the strength and stability of the corrugated corner plate 10, and can also show good elasticity, shrinkage capacity and tension.

[0053] In some embodiments, Figure 1 As shown, the first plate body 11 includes 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 first corrugation 30 smoothly transitions with the first plate portion 111 and the third plate portion 112 at their intersections and extends along a plane.

[0054] In some embodiments, 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 intersections of the second corrugation 40 and the second plate portion 121 and the fourth plate portion 122 are smoothly transitioned and extend along the plane.

[0055] In some embodiments, the intersections of the concave portion 50 with the first corrugation 30 , the second corrugation 40 , the first plate body 11 , and the second plate body 12 are smoothly transitioned.

[0056] In some embodiments, the intersections between the corner portion 126 and the first plate body 11 and the second plate body 12 are smoothly transitioned, 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 corrugated corner plate 10 of the present application has a smooth overall shape and a regular shape in macroscopic view, so as to ensure the strength and stability of the 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, Figure 4 and Figure 5 As shown, the first corrugation 30 and the second corrugation 40 have the same cross-sectional shape obtained by a surface perpendicular to the extension direction of the corrugation, making the shape more regular. The cross-sectional shapes of the first corrugation 30 and the second corrugation 40 can both be circular arches. The arch height H3 of the first corrugation 30 and the arch height H4 of the second corrugation 40 are equal; the arch width W7 of the first corrugation 30 and the arch width W8 of the second corrugation 40 are equal. Furthermore, the arch width size can be 1.5 to 2.5 times the arch height size. Such an arrangement can make the stress change and strain distribution change of the corrugated corner plate 10 in the optimal state.

[0060] In some embodiments, as shown in the figure, the first transition fillet 52 at the intersection of the two corrugations and the concave portion 50 and the bottom arc 51 of the concave portion 50 define a first plane area 53 and a second plane area, respectively. Figure 2 Only the first plane area 53 defined between the first transition fillet 52 at the intersection of the first corrugation 30 and the concave portion 50 and the bottom arc 51 of the concave portion 50 is shown.

[0061] Furthermore, the first plane area 53 and the second plane area are both trapezoidal in shape, that is, two trapezoidal planes are formed; the trapezoidal plane is narrow at the top and wide at the bottom, so that other intersections with the plane area can transition smoothly. The first plane area 53 and the second plane area are mirror-symmetrical about the central interface sandwiched between the two. Therefore, the corresponding dimensions of the two trapezoidal planes are equal. The two plane areas are the transition parts of the two corrugations and the middle intersection, respectively, and the two corrugations are mirror-symmetrical about the 135-degree central interface; therefore, the planes of the two areas are naturally formed. After the corrugated corner plate is formed, the two corrugations are mirror-symmetrical, and the two plane areas are also mirror-symmetrical. Before the pressing is completed and before use and during use, stress unbalance caused by the asymmetry of the two side plane areas will not be generated, thereby causing different internal stresses on the two corrugations and deformation.

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

[0063] In some embodiments, the concave portion 50 includes a first plane area 53, a second plane area, a first transition fillet 52 where two corrugations respectively intersect the concave portion 50, a first side surface 55 and a second side surface 56 where the concave portion 50 respectively connects with two plates, and a second transition fillet 57 where the bottom arc 51 of the concave portion 50 connects with the first side surface 55 and the second side surface 56. The concave portion 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 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 portion 121 and the fourth plate portion 122 are symmetrical 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 portion 111 and the third plate portion 112 constitute a pair, and the second plate portion 121 and the fourth plate portion 122 constitute a pair) of plate portions that are symmetrical about the plane defined by the longitudinal direction D2 and the height direction D3.

[0065] The first plate surface of the first plate portion 111 and the third plate surface of the third plate portion 112 are both planes but are 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 are 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 planes but are 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 are 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 warped upward relative to the transverse direction D1 along the normal direction of their respective planes. The warping 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 second plate portion 121 and the fourth plate portion 122 have the same warping height relative to the transverse direction D1, see Figure 5 The angle between the outer normal N1 of the first plate surface and the outer normal N3 of the third plate surface, as well as the angle between the outer normal N2 of the second plate surface and the outer normal N4 of the fourth plate surface are constant, but the two angles are not equal, which is manifested in space as different warping heights of two pairs of planes (plate portions). 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 concave 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 concave portion 50.

[0066] By designing the plate portion to be raised, it is convenient to overlap with the corrugated plate to form a nearly circular tank body when assembled into a liquefied gas storage tank; and the different raised heights facilitate installation and welding.

[0067] In some embodiments, the first transition fillet 52 where the two corrugations meet the concave portion 50 protrudes outward in a direction perpendicular to the extension of the corrugations. The second transition fillet 57 where the first side surface 55 and the second side surface 56 are respectively connected to the bottom arc 51 of the concave portion 50 protrudes outward in a direction perpendicular to the extension of the corrugations.

[0068] In some embodiments, the radius of the fourth transition fillet 123 at the intersection of the first plate portion 111 and the second plate portion 121 and the radius of the fifth transition fillet 124 at the intersection of the third plate portion 112 and the fourth plate portion 122 are equal, and the radii of the third transition fillet 113 and the sixth transition fillet 125 at the intersection of the two corrugations with the four plate portions are equal; wherein the fourth transition fillet 123 and the fifth transition fillet 124 are the corner portion 126 between the first plate body 11 and the second plate body 12. The above transition fillet radii are made consistent to facilitate the forming of the corner corrugated plate and the appearance of the formed product.

[0069] The radius of the first transition fillet 52 at the intersection of the two corrugations and the concave portion 50 (i.e., the first side 55 and the second side 56), the radius of the second transition fillet 57 between the bottom arc 51 of the concave portion 50 and the first side 55 and the second side 56, and the radius of the transition fillet between the first side 55 and the second side 56 are all equal. The radius of the seventh transition fillet 58 between the first plane area 53 and the second plane area 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 the concave portion 50 of the corrugated corner plate 10 of the embodiment of the present application has severe material deformation, there is a smooth transition at the intersection of each curved surface, so the overall appearance of the corrugated corner plate 10 is smooth, which greatly improves the surface quality of the component; the planes are also smoothly connected and transitioned, and there are precise fixed angles between the planes, 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 liquefied natural gas storage tanks on land and on ships.

[0072] The embodiment of the present application also provides a liquefied gas storage tank, which includes the corrugated corner plate 10 in any of the above embodiments. The corrugated corner plate 10 cooperates with the corrugated plate and other components to assemble a tank body for storing liquefied gas.

[0073] Liquefied gas storage tanks 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 skilled in the art may 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 of them) may be used in combination with each other, and it is contemplated that these embodiments may 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 is formed at the intersection of the first corrugation and the second corrugation.

2. The corrugated corner plate of the liquefied gas storage tank according to claim 1, characterized in that: The first plate body includes a first plate portion and a third plate portion, the first corrugation is formed at the intersection of the first plate portion and the third plate portion; the intersections of the first corrugation and the first plate portion and the third plate portion are smoothly transitioned and extend along a plane; and / or The second plate body includes a second plate portion and a fourth plate portion, the second corrugation is formed at the intersection of the second plate portion and the fourth plate portion; the intersections of the second corrugation and 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 2, characterized in that: A first plane area and a second plane area are defined between transition fillets at the intersection of the two corrugations and the concave portion and the bottom arc of the concave portion.

5. The corrugated corner plate of the liquefied gas storage tank according to claim 4, characterized in that: The first planar area and the second planar area are both trapezoidal in shape; and / or The first planar region and the second planar region are mirror-symmetrical about a central interface sandwiched between the first planar region and the second planar region.

6. The corrugated corner plate of a liquefied gas storage tank according to claim 4, characterized in that: 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.

7. The corrugated corner plate of a liquefied gas storage tank according to claim 2, 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.

8. The corrugated corner plate of the liquefied gas storage tank according to claim 7, 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.

9. The corrugated corner plate of a liquefied gas storage tank according to claim 6, 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.

10. The corrugated corner plate of a liquefied gas storage tank according to claim 9, 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.

11. A liquefied gas storage tank, characterized in that: The invention comprises the corrugated corner panel according to any one of claims 1 to 10.

Images