Corrugated plate and shielding layer for cryogenic liquid cargo system, and cryogenic liquid cargo system

Abstract

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Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of storage tanks or containers, and in particular, to a cryogenic liquid cargo system for containing or storing liquefied natural gas (LNG), a corrugated plate used for the cryogenic liquid cargo system and a shielding layer including the corrugated plate. BACKGROUND

[0002] A liquefied natural gas (LNG) storage tank, as a container for containing and storing LNG, includes both LNG storage tanks on land and LNG storage tanks on marine vessels, with operating temperature usually being as low as -163°C. A sealing shielding layer used to contact LNG in the storage tank is normally composed of corrugated metal plates, and these corrugations form circulation channels for gas in a thermal insulation layer. Since the shielding layer is at an extremely low temperature of about -163°C, while a thermal insulation layer or a support structure is at a relatively high temperature of about 20°C, a thermal siphon effect occurs in an inclined wall that forms an angle with a horizontal direction, such as a vertical wall of the storage tank, where a circulation of gas (or gas mixture) near the interior of the storage tank is cooled, causing the circulation to descend relative to a vertical direction (in the channels formed by the corrugations) between the sealing layer and the thermal insulation layer, while a circulation of gas near the exterior of the storage tank is heated, causing the circulation to rise relative to the vertical direction between the sealing layer and the thermal insulation layer or between the thermal insulation layer and the support wall. The cooled gas circulation and the heated gas circulation form a closed loop at an end of the wall of the storage tank, transferring convective heat through the support wall of the storage tank. The continuous convective circulation of gas flow will exacerbate cold loss, increase the evaporation rate of the liquefied natural gas, and seriously restrict the cold insulation efficiency and economy of the storage tank.

[0003] Accordingly, there is a need to provide a corrugated plate, a shielding layer including the corrugated plate, and a cryogenic liquid cargo system including the shielding layer, so as to 2026204740   02 Oct 2026 block the formation of continuous circulation channels in the thermal insulation layer, thereby limiting natural convection phenomena. SUMMARY

[0004] In order to solve at least the above-mentioned problems, according to an aspect, the present invention provides a corrugated plate for a cryogenic liquid cargo system, where the corrugated plate includes a corrugated plate planar layer and corrugations formed on the corrugated plate planar layer, the corrugated plate planar layer includes a main body portion and an edge portion provided around the main body portion, where the edge portion is adapted to couple to an edge portion of another corrugated plate, the corrugations includes a first corrugation and a second corrugation intersecting the first corrugation, each of the first corrugation and the second corrugation includes, in its longitudinal extension direction, a convex portion protruding relative to an interior of the cryogenic liquid cargo system, a concave portion recessed relative to the interior of the cryogenic liquid cargo system, and a transition portion, where the transition portion links the convex portion and the concave portion together in the longitudinal extension direction, where the convex portion protrudes towards the interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, and the concave portion protrudes away from the interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer.

[0005] In some embodiments, the main body portion and the edge portion are integrally formed.

[0006] In some embodiments, one of the concave portion and the convex portion is provided on the main body portion, while the other of the concave portion and the convex portion is provided on the edge portion.

[0007] In some embodiments, the concave portion is provided on the main body portion and the convex portion is provided on the edge portion.

[0008] In some embodiments, the first corrugation and / or the second corrugation are provided with the concave portion and the convex portion at positions corresponding to the main body portion, and the first corrugation and / or the second corrugation are provided with the concave portion and / or the convex portion at positions corresponding to the edge portion.

[0009] In some embodiments, the corrugations are provided only on the main body portion, and the edge portion is constructed as a flat plate structure. 2026204740   02 Oct 2026

[0010] In some embodiments, a cross-sectional shape of each of the convex portion and the concave portion is any one of the following: a semicircle, a semi-ellipse, a U-shape, a triangle, a square, a polygon or an irregular shape.

[0011] In some embodiments, the cross-sectional shape of the convex portion and / or the concave portion includes a protruding part protruding relative to the interior of the cryogenic liquid cargo system and a recessed part recessed relative to the interior of the cryogenic liquid cargo system, to form a wavy shape.

[0012] In some embodiments, the cross-sectional shapes of the convex portion and the concave portion correspond inversely to each other.

[0013] In some embodiments, the convex portion and the concave portion are connected through the transition portion with a smooth transition, and the transition portion has a curved surface which includes an outward convex structure and / or an inward concave structure.

[0014] In some embodiments, the edge portion is provided with a stepped portion formed by compression, and the stepped portion is used to make adjacent corrugated plates abut against and connect with each other.

[0015] In some embodiments, a quantity of the first corrugations and a quantity of the second corrugations are each in a range of 1-12.

[0016] In some embodiments, the corrugated plate has a length and a width each in a range of 0.3m-3.6m.

[0017] In some embodiments, the first corrugation and the second corrugation have different widths and heights from each other.

[0018] The present invention also discloses a corrugated plate for a cryogenic fluid delivery system, where the corrugated plate includes a corrugated plate planar layer as well as a first corrugation and a second corrugation formed on the corrugated plate planar layer, where the first corrugation intersects the second corrugation, at least one of the first corrugation and the second corrugation has a convex portion, a concave portion and a transition portion in its longitudinal extension direction, where the transition portion links the convex portion and the concave portion together in the longitudinal extension direction, the convex portion protrudes towards an interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, the concave portion protrudes towards an exterior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, where the transition portion is spaced apart from an junction portion of the first corrugation and the second corrugation. 2026204740   18 Jun 2026

[0019] The present invention also discloses a shielding layer for a cryogenic liquid cargo system, where the shielding layer includes a plurality of corrugated plates as described in any one of the above embodiments, and the plurality of corrugated plates are spliced together in a sealed manner.

[0020] In some embodiments, the corrugated plate includes a main body portion and an edge portion provided around the main body portion, the convex portion is provided on the edge portion, and the convex portions of adjacent corrugated plates are connected to each other.

[0021] In some embodiments, the corrugated plate includes a main body portion and an edge portion provided around the main body portion, the concave portion is provided on the edge portion, and the concave portions of adjacent corrugated plates are connected to each other.

[0022] In some embodiments, the corrugated plate includes a main body portion and an edge portion provided around the main body portion, where the corrugations are provided on the main body portion, the edge portion is constructed as a flat plate structure, and the edge portions of adjacent corrugated plates are connected to each other.

[0023] The present invention also discloses a shielding layer for a cryogenic liquid cargo system, where the shielding layer includes the corrugated plate with the convex portion or the concave portion provided on the edge portion as described above, where the shielding layer further includes an additional corrugated plate connected to the corrugated plate, corrugations of the additional corrugated plate only protrude or are only recessed relative to a planar layer of the additional corrugated plate, the corrugations of the additional corrugated plate are comparable to the corrugations of the corrugated plate in size and spacing, with protruding or recessed portions butted against the convex portion or the concave portion of the corrugated plate.

[0024] The present invention also discloses a cryogenic liquid cargo system, where the cryogenic liquid cargo system has a container wall which includes the shielding layer as described in any one of the above embodiments.

[0025] In some embodiments, the container wall sequentially includes a second insulation layer, a second shielding layer, a first insulation layer and a first shielding layer in its thickness direction, where the first shielding layer is supported on the first insulation layer, and the second shielding layer is supported on the second insulation layer, and the first shielding layer is used to contact contents in the cryogenic liquid cargo system.

[0026] In some embodiments, the first shielding layer and the second shielding layer have the same structure. 2026204740   18 Jun 2026

[0027] In some embodiments, a protruding direction of the corrugations on the corrugated plate of the first shielding layer is the same as or opposite to that of the corrugations on the corrugated plate of the second shielding layer, so that orientations of the first shielding layer and the second shielding layer are the same or opposite.

[0028] In some embodiments, the first shielding layer and the second shielding layer have different structures.

[0029] In some embodiments, the cryogenic liquid cargo system is a storage tank for storing cryogenic liquids.

[0030] With the corrugated plate, the shielding layer and the cryogenic liquid cargo system according to the above solutions of the present invention, the convex portion and the concave portion are provided in the longitudinal extension direction of the corrugations of the corrugated plate, and the convex portion and the concave portion are connected together through the twisted portion, so that an originally continuous circulation channel located in the corrugations is blocked from circulation by the twisted portion structure at the “convex-concave” junction, thereby destroying the conditions for forming stable convection of gas in the long continuous channel. This inhibits heat transfer, improves the thermal insulation performance of the cryogenic liquid cargo system and effectively reduces the evaporation of the LNG in the cryogenic liquid cargo system, and further reduces cargo loss and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. Those skilled in the art should understand that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention without any limiting effect to the scope of the present invention, and the components in the accompanying drawings are not drawn to scale.

[0032] FIG. 1 is a three-dimensional schematic diagram of a corrugated plate according to a first preferred embodiment of the present invention.

[0033] FIG. 2 is a three-dimensional schematic diagram of a corrugated plate according to a second preferred embodiment of the present invention. 2026204740   18 Jun 2026

[0034] FIG. 3 is an enlarged schematic view of a part of the corrugated plate shown in FIG. 1, illustrating a stepped portion of an edge portion of the corrugated plate;

[0035] FIG. 4 is a three-dimensional schematic diagram of a shielding layer according to a first preferred embodiment of the present invention, where two corrugated plates included in the shielding layer are both corrugated plates shown in FIG. 1.

[0036] FIG. 5 is a three-dimensional schematic diagram of a shielding layer according to a second preferred embodiment of the present invention, where two corrugated plates included in the shielding layer are both corrugated plates shown in FIG. 2.

[0037] FIG. 6 is a three-dimensional schematic diagram of a shielding layer according to a third preferred embodiment of the present invention, where one of the corrugated plates included in the shielding layer is the corrugated plate shown in FIG. 1.

[0038] FIG. 7 is a three-dimensional schematic diagram of a part of a container wall of a cryogenic liquid cargo system according to a first preferred embodiment of the present invention.

[0039] FIG. 8 is a three-dimensional schematic diagram of a part of a container wall of a cryogenic liquid cargo system according to a second preferred embodiment of the present invention. DESCRIPTION OF EMBODIMENTS

[0040] Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the description here is only based on the preferred embodiments of the present invention, and those skilled in the art can think of other ways to implement the present invention on the basis of the preferred embodiments, and the other ways also fall within the scope of the present invention.

[0041] The present invention provides a corrugated plate, a shielding layer composed of a plurality of corrugated plates spliced together, and a cryogenic liquid cargo system including the shielding layer. The corrugated plate is preferably made of a metal material such as steel or an aluminum alloy, and is suitable for use in manufacturing storage containers, in particular cryogenic liquid cargo systems for storing liquefied gases such as liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, liquid hydrogen, liquid helium, in marine or land-based engineering equipment. The cryogenic liquid cargo system may be a storage tank for storing cryogenic liquids. The preferred embodiments of the corrugated plate, the shielding layer, and the cryogenic liquid cargo system according to the present invention will be described below with reference to FIGS. 1-8. 2026204740   18 Jun 2026

[0042] As shown in FIG. 1, the corrugated plate 100 is processed from a flat metal plate, and its length and width can be between 0.3m and 3.6m, and those skilled in the art can process it according to actual needs. The corrugated plate 100 includes a generally rectangular corrugated plate planar layer 110 and corrugations formed on the corrugated plate planar layer 110. The corrugated plate plane layer 110 is a generally flat structure and is divided into two regions: a main body portion 111 and an edge portion 112. The edge portion 112 is provided around the main body portion 111 and is mainly used to connect with an edge portion 112 of another adjacent corrugated plate. For example, the edge portions 112 of two corrugated plates can be connected in a sealed manner by welding. In a preferred embodiment, the main body portion 111 and the edge portion 112 are integrally formed as a whole, thereby ensuring the overall strength and sealing performance of the corrugated plate 100.

[0043] The corrugations include a first corrugation 120 and a second corrugation 130. Both the first corrugation 120 and the second corrugation 130 are in an extended configuration and intersect with each other, forming a junction portion 151 at a junction position. The junction portion 151 has a specific knot structure, so that a structural strength of the corrugated plate 100 at the junction position can be enhanced, which is beneficial for prolonging its service life. In the illustrated embodiment, the first corrugation 120 and the second corrugation 130 are orthogonal. It can be understood that in other embodiments not shown, the first corrugation 120 and the second corrugation 130 may also be oblique to each other. A quantity of the first corrugations 120 and a quantity of the second corrugations 130 may be 1-12, depending on the overall size of the corrugated plate 100. For example, in the illustrated embodiment, the quantity of the first corrugations 120 is 6, and the quantity of the second corrugations 130 is 2. Of course, those skilled in the art may set other numbers of the first corrugations 120 and the second corrugations 130 according to actual needs. The first corrugation 120 and the second corrugation 130 together form a grid-like corrugation structure on the corrugated plate 100, so that the corrugated plate 100 can absorb thermal stress and mechanical stress caused by temperature change or internal pressure fluctuation in a plurality of directions.

[0044] Preferably, the first corrugation 120 and the second corrugation 130 have different widths and heights from each other. In particular, a width of the first corrugation 120 is greater than that of the second corrugation 130, and a height of the first corrugation 120 is greater than that of the second corrugation 130. The “width” of the corrugation mentioned here refers to a maximum horizontal dimension of the corrugation perpendicular to its longitudinal extension direction, and the “height” of the corrugation refers to a vertical distance between a highest point 2026204740   18 Jun 2026 of the corrugation and the corrugated plate planar layer. The “longitudinal extension direction” is relative to each individual corrugation, which is a lengthwise direction of the individual corrugation, that is, an extension direction of the corrugation channel. For example, as shown in FIG. 1, the longitudinal extension direction of the first corrugation 120 is direction D1 in the figure, and the longitudinal extension direction of the second corrugation 130 is direction D2 in the figure. Referring to characteristics such as height and width, the first corrugation 120 may also be referred to as a large corrugation, and the second corrugation 130 may also be referred to as a small corrugation.

[0045] In an embodiment, each of the first corrugation 120 and the second corrugation 130 includes, in its longitudinal extension direction, at least one convex portion 121 and at least one concave portion 122 adjacent to the at least one convex portion 121, rather than a single continuous protrusion or depression form. In particular, each of the first corrugation 120 and the second corrugation 130 further includes a twisted portion 140 located at a junction portion of the convex portion 121 and the concave portion 122 for linking the convex portion 121 and the concave portion 122 together in the respective longitudinal extension directions of the first corrugation 120 and the second corrugation 130. The convex portion 121 protrudes towards an interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer 110, while the concave portion 122 protrudes away from the interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer 110. It should be noted that the “protrude” and the “recess” are both relative to the interior of the cryogenic liquid cargo system, the “protrude” means extending along a direction towards the interior of the cryogenic liquid cargo system, while the “recess” means extending along a direction towards the exterior of the cryogenic liquid cargo system. This convex-concave cooperation design has brought significant technical effects, which breaks the restriction that the corrugations of a traditional corrugated plate are monotonous over the entire length. By providing the convex portion 121, the concave portion 122 and the twisted portion 140 connecting the convex portion 121 and the concave portion 122 in the longitudinal extension direction of the corrugation, an original continuous channel is blocked by the convex-concave cooperation structure (i.e. the twisted portion 140), thereby destroying the conditions for forming stable convection of gas in the long continuous channel. This inhibits heat transfer, improves the thermal insulation performance of the cryogenic liquid cargo system and effectively reduces the evaporation of the LNG in the cryogenic liquid cargo system, and further reduces cargo loss.

[0046] In an embodiment, the twisted portion is spaced apart from the junction portion 151 of the first corrugation 120 and the second corrugation 130. The term “spaced apart from” as used 2026204740   18 Jun 2026 herein means that the two components are not adjacent to each other. That is to say, a connection between the convex portion 121 and the concave portion 122 is spaced apart from and not adjacent to the junction portion 151 of the first corrugation 120 and the second corrugation 130. The junction portion 151 is usually a location with complex stress. By arranging the “transition connection part” where the shape of the corrugations changes away from the junction portion 151, additional stress changes can be avoided from being superimposed in the stress concentration region, thereby further improving the overall fatigue life of the corrugated plate 100.

[0047] Preferably, the first corrugation 120 and the second corrugation 130 have the same convex-concave structure configuration. Therefore, for the sake of simplicity, only the first corrugation 120 will be described in detail below. However, it should be understood that those skilled in the art may also set the first corrugation 120 and the second corrugation 130 to have different convex-concave structure configurations.

[0048] In a preferred embodiment, as shown in FIG. 1, the first corrugation 120 includes a middle section 161 on the main body portion 111 and two edge sections 162 on the edge portion 112. The middle section 161 forms a concave portion 122 that is recessed relative to the corrugated plate planar layer 110, and the two edge sections 162 form convex portions 121 protruding relative to the corrugated plate planar layer 110, that is to say, the first corrugation 120 forms a “convex-concave-convex” structural configuration in its longitudinal extension direction D1. The convex portion 121 and the concave portion 122 smoothly transition at the twisted portion 140 along the longitudinal extension direction D1 of the first corrugation 120 and are connected in a sealed manner, together forming a complete corrugation unit. In a preferred embodiment, the twisted portion 140 has a curved shape, which can effectively avoid stress concentration. As shown in FIG. 1, the connecting curved surface includes an inward concave structure 142 with a larger curvature radius. In other embodiments, the connecting curved surface may also be configured as an outward convex structure 241 (as shown in FIG. 2), or the connecting curved surface may also include both an outward convex structure and an inward concave structure. For example, in the region near the convex portion 121, it is the outward convex structure, and in the region near the concave portion 122, it is the inward concave structure. Those skilled in the art can make configurations according to actual needs.

[0049] In the above solution, each edge section 162 of the first corrugation 120 is provided as the convex portion 121, so that when two corrugated plates 100 with the same structure are connected, the protruding edge section 162 of one corrugated plate 100 may overlap the edge section 162 of the other corrugated plate 100 which also protrudes, making it convenient for 2026204740   18 Jun 2026 welding. Furthermore, the middle section 161 of the first corrugation 120 is provided as the concave portion 122, so that the concave portion 122 can be easily supported and borne by the thermal insulation layer on the outer side of the corrugated plate, without the need to place additional reinforcements on the outer side of the corrugation, which not only improves the pressure-bearing capacity, but also expands the loading capacity of the cryogenic liquid cargo system.

[0050] The present invention provides a variety of flexible variations to the distribution of the convex portions and the concave portions on a single corrugation, so as to adapt to different connection requirements and stress conditions. This will be described in detail below.

[0051] In the corrugated plate 200 shown in FIG. 2, the convex portion 221 of the first corrugation 220 is provided on the main body portion 211, and the concave portions connected to the convex portion 221 are provided on the edge portions 212 at both ends. That is to say, the first corrugation 220 forms a “concave-convex-concave” structural configuration in its longitudinal extension direction D1. The convex portion 221 and the concave portion 222 smoothly transition at the twisted portions 240 along the longitudinal extension direction D1 of the first corrugation 220 and are connected in a sealed manner, together forming a complete corrugation unit.

[0052] In another embodiment, the middle section of the first corrugation (i.e. the section provided on the main body portion) may also include a combination of the convex portion and the concave portion, rather than only a single convex portion or concave portion. The edge section may include only the convex portion or only the concave portion, or may include the concave portion on one side and the convex portion on the other side. The middle section may include a convex portion and a concave portion, and may also include a plurality of convex portions and a plurality of concave portions. For example, the corrugation shape of the first corrugation may be convex (edge)-concave-convex-concave-convex (edge) or convex (edge)-convex-concave-convex (edge), or concave (edge)-concave-convex-concave (edge), or convex (edge)-concave-convex-concave (edge), etc., which can be set by those skilled in the art according to actual needs.

[0053] In yet another embodiment, the entire corrugations including the first corrugation and the second corrugation is provided only on the main body portion, and the edge portion is configured as a flat structure without any corrugation undulations. This design simplifies the shape of the edge portion so that the edge portions of two corrugated plates can be lap welded or butt welded in a plane-to-plane manner. Each of the first corrugation and the second corrugation may include a convex portion and a concave portion, and may also include a plurality of convex portions and a plurality of concave portions. 2026204740   18 Jun 2026

[0054] The cross-sections of the convex portion 121 and the concave portion 122 taken perpendicular to the longitudinal extension direction of the corrugation may have various shapes. In some embodiments, both the convex portion 121 and the concave portion 122 may have a semicircular cross-section. For example, referring to FIG. 1, the cross-sections of the convex portion 121 and the concave portion 122 are each formed as a semi-circle, and the top end of each of the convex portion 121 and the concave portion 122 is formed as a circular arc without angular corners, and this shape has a smooth transition and minimal stress concentration. Of course, it should be understood that, in other embodiments, the cross-sections of the convex portion 121 and the concave portion 122 may be semi-elliptic, U-shaped, triangular, rectangular, polygonal, or irregularly shaped. In an embodiment, the cross-sectional shape of each of the convex portion 121 and / or the concave portion 122 may include a protruding part protruding relative to the interior of the cryogenic liquid cargo system and a recessed part recessed relative to the interior of the cryogenic liquid cargo system. For example, it may include two recessed parts and one protruding part to form a wavy shape.

[0055] In order to facilitate the welding between two adjacent corrugated plates 100, preferably, as shown in FIG. 3, the edge portion 112 of the corrugated plate 100 (including the edge section 162 of the corrugation having the convex portion 121 or the concave portion 122) is provided with a stepped portion 150 formed by upward or downward pressing, and the stepped portion 150 may facilitate the lapping of the edge portions 112 of two adjacent corrugated plates 100 at the stepped portion 150, thereby ensuring that the welding heat source can uniformly act on the two overlapped plates, thereby forming a dense and reliable weld. Further preferably, a height of the stepped portion 150 is comparable to a thickness of the corrugated plate 100, such that the junction portion of the two corrugated plates 100 has a smooth surface after the lapping is completed.

[0056] The present invention also provides a shielding layer for a cryogenic liquid cargo system, and the shielding layer is composed of a plurality of corrugated plates spliced together in a sealed manner.

[0057] In a preferred embodiment, the shielding layer 170 is formed by splicing the plurality of corrugated plates 100 in a sealed manner as described in any one of the above embodiments. Preferably, the plurality of corrugated plates 100 have the same structure as each other, and the plurality of corrugated plates 100 have the same orientation in the spliced state.

[0058] As shown in FIG. 4, in an embodiment, the concave portions 122 of the corrugations of each corrugated plate in the shielding layer 170 are provided on the main body portions 111 and the convex portions 121 are provided on the edge portions 112. The convex portions 121 of two 2026204740   18 Jun 2026 adjacent corrugated plates 100 may be lapped or butted against each other, and connected in a sealed manner through a weld.

[0059] As shown in FIG. 5, in an embodiment, the convex portions 221 of the corrugations of each corrugated plate in the shielding layer 270 are provided on the main body portions 211 and the concave portions 222 are provided on the edge portions 212. The concave portions 222 of two adjacent corrugated plates may be lapped or butted against each other, and connected in a sealed manner through a weld.

[0060] In another embodiment not shown, both the convex portions and the concave portions of the corrugations can be provided on the main body portions, and the edge portions are in a flat plate structure, so that the flat plate edges of adjacent corrugated plates are directly connected by a butt weld or a lap weld.

[0061] In another preferred embodiment, the shielding layer can be formed by splicing, in a sealed manner, the corrugated plate 100 with the concave portion 122 or the convex portion 121 provided on the edge portion 112 as shown in FIG. 1 or FIG. 2 and an additional corrugated plate 100’ in the prior art. The additional corrugated plate 100’ may be a conventional corrugated plate structure in the prior art. For example, the additional corrugated plate 100’ may include an additional corrugated plate planar layer 110’ and one or more additional corrugations 120’ formed on the additional corrugated plate planar layer 110’, where the additional corrugations 120’ also include two intersecting corrugations, and each corrugation extends from one end of the additional corrugated plate planar layer 110’ to the other end. The additional corrugations 120’ only protrude or are only recessed relative to the additional corrugated plate planar layer 110’, that is to say, each of the intersecting corrugations formed on the additional corrugated plate 100’ is a single continuous protrusion or a single continuous depression in its longitudinal extension direction. Moreover, the additional corrugations 120’ are comparable to the corrugations of the corrugated plate 100 in size and spacing. When splicing the corrugated plate 100 and the additional corrugated plate 100’ together, the protruding or recessed portions of the additional corrugation 120’ are aligned and butted against the convex portion 121 or the concave portion 122 of the corrugated plate 100. For example, as shown in FIG. 6, the shielding layer 370 includes a corrugated plate 100 with the convex portions 121 provided on the edge portions 112 as shown in FIG.1 and an additional corrugated plate 100’, where the additional corrugations 120’ of the additional corrugated plate 100’ protrude relative to the additional corrugated plate planar layer 110’. During splicing, the protruding additional corrugations 120’ are butted against the convex portions 121 of the corrugated plate 100 on the edge portions 112. In other embodiments not shown, the additional 2026204740   18 Jun 2026 corrugations of the additional corrugated plate may also be recessed relative to the additional corrugated plate planar layer, and in this case, the additional corrugated plate may be connected to the corrugated plate 200 with the concave portion 222 provided at the edge portion 212 as shown in FIG. 2.

[0062] The shielding layer 370 formed by this splicing method splices the corrugated plate having the concave-convex cooperation structure formed according to the design solution of the present invention and the corrugated plate in the prior art together. Therefore, even if the corrugated plate in the prior art has continuous channels, the shielding layer 370 can still bring significant technical effects as mentioned above, since the concave-convex cooperation structure in the corrugated plate of the present invention can block the continuous channels in the existing corrugated plate, thereby disrupting the conditions for forming stable convection of gas in long continuous channels.

[0063] The present invention also provides a cryogenic liquid cargo system, which can be a storage tank for storing cryogenic liquid. The cryogenic liquid cargo system has a container wall. FIG. 7 illustrates a part of the container wall of the cryogenic liquid cargo system according to a preferred embodiment of the present invention. For the sake of simplicity, the structure of each layer of the container wall is only partially displayed. As shown in FIG. 7, the container wall 180 sequentially includes a second insulation layer 184, a second shielding layer 183, a first insulation layer 182, and a first shielding layer 181 from the outside to the inside. That is, the first shielding layer 181 is located at the innermost side of the container wall and contacts the contents (e.g., LNG) in the cryogenic liquid cargo system, and the second insulation layer 184 is located at the outermost side. The first insulation layer 182 and the second insulation layer 184 are both formed by arranging insulation boards (such as plywood) made of thermal insulation materials, and both the first shielding layer 181 and the second shielding layer 183 may adopt the shielding layer structure mentioned above. The second shielding layer 183 serves as a secondary sealing film and is supported on the second insulation layer 184, and the first shielding layer 181 serves as a primary sealing film and is supported on the first insulation layer 182.

[0064] In a preferred embodiment, the first shielding layer 181 and the second shielding layer 183 have the same structure and the same orientation. The “same structure” mentioned here means that the structures of the first shielding layer 181 and the second shielding layer 183 are identical, including the structure of the corrugated plates 100 used and the connection manner between the corrugated plates 100 (convex-concave cooperation or concave-concave cooperation, etc.). As shown in FIG. 7, both the first shielding layer 181 and the second shielding layer 183 adopt the 2026204740   18 Jun 2026 corrugated plate structure shown in FIG. 1, that is, the concave portions 122 are provided on the main body portion 111 of the corrugated plate 100, and the convex portions 121 are provided on the edge portions 112 of the corrugated plate 100. Furthermore, the orientations of the corrugated plates 100 in the first shielding layer 181 are the same as those in the second shielding layer 183, that is, the protruding directions of the corrugations on the corrugated plates of the first shielding layer 181 and the second shielding layer 183 are the same. In other embodiments not shown, both the first shielding layer 181 and the second shielding layer 183 may also adopt the corrugated plate structure shown in FIG. 2, that is, the convex portions 221 are provided on the main body portion 211 of the corrugated plate 200 and the concave portions 222 are provided on the edge portions 212 of the corrugated plate 200.

[0065] In another preferred embodiment, the first shielding layer 181 and the second shielding layer 183 may have the same structure but adopt opposite orientations. For example, the first shielding layer 181 may adopt the corrugated plate structure shown in FIG. 1, that is, the concave portions 122 are provided on the main body portion 111 of the corrugated plate 100, and the convex portions 121 are provided on the edge portions 112 of the corrugated plate 100. The second shielding layer 183 may also adopt the corrugated plate structure shown in FIG. 1, but is arranged in an orientation opposite to that of the first shielding layer 181, that is, the convex portions 121 are provided on the main body portion 111 of the corrugated plate 100, and the concave portions 122 are provided on the edge portions 112 of the corrugated plate 100. Alternatively, the first shielding layer 181 may adopt the corrugated plate structure shown in FIG. 2, that is, the concave portions 222 are provided on the main body portion 211 of the corrugated plate 200, and the convex portions 221 are provided on the edge portion 212 of the corrugated plate 200. The second shielding layer 183 may also adopt the corrugated plate structure shown in FIG. 2, but is arranged in an orientation opposite to the first shielding layer 181, that is, the convex portions 221 are provided on the main body portion 211 of the corrugated plate 200 and the concave portions 222 are provided on the edge portions 212 of the corrugated plate 200.

[0066] FIG. 8 shows a part of a container wall of a cryogenic liquid cargo system according to another preferred embodiment of the present invention. Similar to the container wall described above, the container wall 280 shown in FIG. 8 also sequentially includes a second insulation layer 284, a second shielding layer 283, a first insulation layer 282, and a first shielding layer 281 from the outside to the inside. For the sake of simplicity, the structure of each layer is only partially displayed. In this embodiment, the first shielding layer 281 and the second shielding layer 283 may adopt different structures. For example, the first shielding layer 281 adopts the shielding layer 2026204740   18 Jun 2026 structure shown in FIG. 6, that is, the first shielding layer 281 can be formed by splicing the corrugated plate 100 improved according to the solution of the present invention and the additional corrugated plate 100’ in the prior art. The second shielding layer 283 adopts the shielding layer structure shown in FIG. 4, that is, the second shielding layer 283 is formed by splicing a plurality of corrugated plates 100 improved according to the present invention. Those skilled in the art can make configurations according to actual needs.

[0067] The above description of various embodiments of the invention is provided to one of ordinary skill in the relevant art for the purpose of description. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As mentioned above, those of ordinary skill in the art taught above will understand various alternatives and variations of the present invention. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all alternatives, modifications and variations of the invention described herein, as well as other embodiments falling within the spirit and scope of the invention as described above.

[0068] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that such prior art forms part of the common general knowledge.

[0069] It will be understood that the terms “comprise” and “include” and any of their derivatives (e.g. comprises, comprising, includes, including) as used in this specification, and the claims that follow, is to be taken to be inclusive of features to which the term refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.

[0070] In some cases, a single embodiment may, for succinctness and / or to assist in understanding the scope of the disclosure, combine multiple features. It is to be understood that in such a case, these multiple features may be provided separately (in separate embodiments), or in any other suitable combination. Alternatively, where separate features are described in separate embodiments, these separate features may be combined into a single embodiment unless otherwise stated or implied. This also applies to the claims which can be recombined in any combination. That is a claim may be amended to include a feature defined in any other claim. Further a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c. 2026204740   18 Jun 2026

[0071] It will be appreciated by those skilled in the art that the disclosure is not restricted in its use to the particular application or applications described. Neither is the present disclosure restricted in its preferred embodiment with regard to the particular elements and / or features described or depicted herein. It will be appreciated that the disclosure is not limited to the embodiment or embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope as set forth and defined by the following claims.

Claims

1. A corrugated plate for a cryogenic liquid cargo system, wherein the corrugated plate comprises a corrugated plate planar layer and corrugations formed on the corrugated plate planar layer, the corrugated plate planar layer comprises a main body portion and an edge portion provided around the main body portion, wherein the edge portion is adapted to couple to an edge portion of another corrugated plate, the corrugations comprises a first corrugation and a second corrugation intersecting the first corrugation, each of the first corrugation and the second corrugation comprises, in a longitudinal extension direction thereof, a convex portion protruding relative to an interior of the cryogenic liquid cargo system, a concave portion recessed relative to the interior of the cryogenic liquid cargo system, and a transition portion, wherein the transition portion links the convex portion and the concave portion together in the longitudinal extension direction, the convex portion protrudes towards the interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, and the concave portion protrudes away from the interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer.

2. The corrugated plate according to claim 1, wherein the main body portion and the edge portion are integrally formed.

3. The corrugated plate according to claim 1, wherein one of the concave portion and the convex portion is provided on the main body portion, while the other of the concave portion and the convex portion is provided on the edge portion.

4. The corrugated plate according to claim 1 or 3, wherein the concave portion is provided on the main body portion and the convex portion is provided on the edge portion.

5. The corrugated plate according to claim 1, wherein the first corrugation and / or the second corrugation are provided with the concave portion and the convex portion at positions corresponding to the main body portion, and the first corrugation and / or the second corrugation are provided with the concave portion and / or the convex portion at positions corresponding to the edge portion.

6. The corrugated plate according to claim 1, wherein the corrugations are provided only on the main body portion, and the edge portion is constructed as a flat plate structure.

7. The corrugated plate according to claim 1, wherein a cross-sectional shape of each of the convex portion and the concave portion is any one of the following: a semicircle, a semi-ellipse, a U-shape, a triangle, a square, a polygon or an irregular shape;2026204740   02 Oct 20268. The corrugated plate according to claim 7, wherein the cross-sectional shape of the convex portion and / or the concave portion comprises a protruding part protruding relative to the interior of the cryogenic liquid cargo system and a recessed part recessed relative to the interior of the cryogenic liquid cargo system, to form a wavy shape.

9. The corrugated plate according to claim 1 or 7, wherein cross-sectional shapes of the convex portion and the concave portion correspond inversely to each other.

10. The corrugated plate according to claim 1, wherein the convex portion and the concave portion are connected through the transition portion with a smooth transition, and the transition portion has a curved surface which comprises an outward convex structure and / or an inward concave structure.

11. The corrugated plate according to claim 1, wherein the edge portion is provided with a stepped portion formed by compression, and the stepped portion is used to make adjacent corrugated plates abut against and connected with each other.

12. The corrugated plate according to claim 1, wherein a quantity of the first corrugations and a quantity of the second corrugations are each in a range of 1-12, and / or the corrugated plate has a length and a width each in a range of 0.3m-3.6m.

13. The corrugated plate according to claim 1, wherein the first corrugation and the second corrugation have different widths and heights from each other.

14. A corrugated plate for a cryogenic liquid delivery system, wherein the corrugated plate comprises a corrugated plate planar layer and a first corrugation and a second corrugation formed on the corrugated plate planar layer, wherein the first corrugation intersects the second corrugation, at least one of the first corrugation and the second corrugation has a convex portion, a concave portion and a transition portion in its longitudinal extension direction, wherein the transition portion links the convex portion and the concave portion together in the longitudinal extension direction, the convex portion protrudes towards an interior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, and the concave portion protrudes towards an exterior of the cryogenic liquid cargo system relative to the corrugated plate planar layer, wherein the transition portion is far from an junction portion of the first corrugation and the second corrugation.

15. A shielding layer for a cryogenic liquid cargo system, wherein the shielding layer comprises a plurality of corrugated plates according to any one of claims 1-14, and the plurality of corrugated plates are spliced together in a sealed manner.

16. The shielding layer according to claim 15, wherein the corrugated plate comprises a main body portion and an edge portion provided around the main body portion, the convex portion2026204740   02 Oct 2026is provided on the edge portion, and the convex portions of adjacent corrugated plates are connected to each other.

17. The shielding layer according to claim 15, wherein the corrugated plate comprises a main body portion and an edge portion provided around the main body portion, the concave portion is provided on the edge portion, and the concave portions of adjacent corrugated plates are connected to each other.

18. The shielding layer according to claim 15, wherein the corrugated plate comprises a main body portion and an edge portion provided around the main body portion, wherein the corrugations are provided on the main body portion, the edge portion is constructed as a flat plate structure, and the edge portions of adjacent corrugated plates are connected to each other.

19. A shielding layer for a cryogenic liquid cargo system, wherein the shielding layer comprises the corrugated plate according to claim 3, wherein the shielding layer further comprises an additional corrugated plate connected to the corrugated plate, corrugations of the additional corrugated plate only protrudes or are only recessed relative to a planar layer of the additional corrugated plate, corrugations of the additional corrugated plate have comparable size and spacing to the corrugations of the corrugated plate, with a protruding or recessed portion butted against the convex portion or the concave portion of the corrugated plate.

20. A cryogenic liquid cargo system, wherein the cryogenic liquid cargo system has a container wall which comprises the shielding layer according to any one of claims 15-19.

21. The cryogenic liquid cargo system according to claim 20, wherein the container wall sequentially comprises, in a thickness direction thereof, a second insulation layer, a second shielding layer, a first insulation layer and a first shielding layer, wherein the first shielding layer is supported on the first insulation layer, and the second shielding layer is supported on the second insulation layer, and the first shielding layer is used to contact contents in the cryogenic liquid cargo system.

22. The cryogenic liquid cargo system according to claim 21, wherein the first shielding layer and the second shielding layer have the same structure.

23. The cryogenic liquid cargo system according to claim 22, wherein a protruding direction of the corrugations on the corrugated plate of the first shielding layer is the same as or opposite to that of the corrugations on the corrugated plate of the second shielding layer, so that the first shielding layer and the second shielding layer have the same orientation or opposite orientations.

24. The cryogenic liquid cargo system according to claim 21, wherein the first shielding layer and the second shielding layer have different structures.2026204740   02 Oct 202625. The cryogenic liquid cargo system according to claim 20, wherein the cryogenic fluid cargo system is a storage tank for storing cryogenic liquids.

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