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

Abstract

The present application provides a corrugated plate of a liquefied gas storage tank and a liquefied gas storage tank. The corrugated plate comprises a corrugated plate body; a transverse corrugation formed on the corrugated plate body; a longitudinal corrugation formed on the corrugated plate body and comprising a first longitudinal corrugation and a second longitudinal corrugation respectively located on two opposite sides of the transverse corrugation; reinforcing ribs respectively formed on the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation; and an intersection portion formed at the intersection of the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation. The corrugated plate of the present application has high overall strength and stability. In addition, the reinforcing ribs formed on the corrugations increase the surface area of the corrugated plate in contact with liquefied gas and increase the local cross-sectional area of the corrugations, thereby further enhancing the strength and rigidity of the corrugations and the corrugated plate.

Description

A corrugated plate for a liquefied gas storage tank and the liquefied gas storage tank. Technical Field

[0001] This application belongs to the technical field of liquefied gas storage equipment, and specifically relates to corrugated plates and liquefied gas storage tanks for land and shipboard liquefied gas storage tanks. Background Technology

[0002] The Chinese government attaches great importance to the development and utilization of clean energy. Liquefied gases (such as liquefied natural gas, or LNG) are clean and efficient fossil fuels, playing a vital role in the country's energy structure adjustment and clean and low-carbon development strategy. In accordance with the country's "dual carbon" goals (peaking carbon emissions before 2030 and achieving carbon neutrality before 2060), LNG and other new energy materials, as transitional energy sources, help reduce carbon emissions during the energy transition and play a crucial role in achieving this goal.

[0003] Currently, liquefied gas (LNG) storage in my country primarily utilizes tank storage, which can be categorized into traditional fully enclosed tanks and emerging membrane tanks. Fully enclosed tanks are constructed from 9% nickel-plated steel plates, while membrane tanks are made from corrugated stainless steel plates welded together. Compared to fully enclosed tanks, membrane tanks use corrugated plate units welded together, avoiding weld stress. Furthermore, the corrugations on the plates allow for better energy absorption and release during LNG injection and output. In recent years, the domestic new energy vehicle industry has experienced strong growth, making the exploration and application of materials for various new energy sources particularly important. Liquid hydrogen, a colorless, odorless, high-energy cryogenic liquid fuel, is obtained by cooling hydrogen gas. Membrane tanks are also the ideal storage medium for cryogenic storage and transportation of liquid hydrogen. However, the construction challenges of membrane tanks lie in their complex design requirements, stringent material standards, safety and reliability, environmental adaptability, regulatory compliance, and cost control. With technological advancements and accumulated experience, these challenges are gradually being overcome. Therefore, with the continuous development of the new energy industry, more new energy sources will be explored and discovered. In this process, membrane-type storage tanks will have greater application prospects in the storage and transportation of many liquefied gases in the future.

[0004] The corrugated plates that make up membrane-type storage tanks need to maintain good airtightness and resistance to deformation. As the part that comes into direct contact with liquefied gas, the continuity and airtightness of the welds between the corrugated plates must be ensured, and they must meet the working conditions under specific environmental requirements, i.e., have high environmental adaptability. Therefore, the structure, shape, and forming quality of the corrugated plates are particularly important. However, the corrugation dimensions, the smoothness at the corrugation junctions, the uniformity of thickness, and the overall strength and reliability of the existing corrugated plates all need further improvement and enhancement.

[0005] Therefore, providing a corrugated sheet that can alleviate or solve the above problems to some extent is an urgent issue to be addressed. Summary of the Invention

[0006] To address the aforementioned technical problems in the prior art, this application provides a corrugated plate for a liquefied gas storage tank and a liquefied gas storage tank.

[0007] The technical solution adopted in this application embodiment is: a corrugated plate for a liquefied gas storage tank, including a corrugated plate body, and further comprising:

[0008] Transverse corrugations are formed on the corrugated plate body;

[0009] Longitudinal corrugations are formed on the corrugated plate body and include a first longitudinal corrugation and a second longitudinal corrugation located on opposite sides of the transverse corrugations, respectively.

[0010] Reinforcing ribs are respectively formed on the transverse corrugations, the first longitudinal corrugations, and the second longitudinal corrugations;

[0011] The confluence portion is formed at the intersection of the transverse corrugations, the first longitudinal corrugations, and the second longitudinal corrugations.

[0012] In an optional embodiment, the intersecting portion includes a smooth top surface and four draw bars extending from the smooth top surface to the corrugated plate body. Each draw bar extends from the smooth top surface and transitions smoothly, and continues to extend in the transverse, longitudinal, and height directions, smoothly intersecting with the transverse corrugations, the longitudinal corrugations, and the corrugated plate body. As the draw bar extends from the smooth top surface to the corrugated plate body, the cross-sectional dimensions of the cross-section in the plane defined by the transverse and longitudinal directions gradually increase.

[0013] In an optional embodiment, the corrugated plate body is mirror-symmetrical about a plane defined by the transverse direction and the height direction at the center line of the transverse corrugation ridge at the top of the transverse corrugation, and the outer normals of the two symmetrical planes form a certain angle; the outer sides of the two symmetrical planes curve upwards at a certain angle.

[0014] In an optional embodiment, the cross-sectional shape of the transverse corrugations, when the plane defined by the longitudinal and height directions is used as a section, is an arch shape; the cross-sectional shapes of the first longitudinal corrugations and the second longitudinal corrugations, when the plane defined by the transverse and height directions is used as a section, are both arch shapes; and / or

[0015] The arch width dimensions of the transverse corrugations, the first longitudinal corrugation, and the second longitudinal corrugation are all equal; and / or

[0016] The arch height of the transverse corrugation, the arch height of the first longitudinal corrugation, and the arch height of the second longitudinal corrugation are all equal; and / or

[0017] The width of the arch is twice the height of the arch; and / or

[0018] The transverse corrugations, the first longitudinal corrugations, and the second longitudinal corrugations have equal arc radii at their respective top ridges and equal arc radii on both sides of their respective arch bottom ends. Furthermore, the cross-sectional dimensions of the transverse corrugations, the first longitudinal corrugations, and the second longitudinal corrugations all exhibit a gradual contraction from bottom to top in the height direction.

[0019] In an optional embodiment, the transverse corrugations are provided with first reinforcing ribs on the portions on both sides of the intersection, and the first reinforcing ribs are formed by a partial downward indentation at the top of the transverse corrugations;

[0020] The first longitudinal corrugation is provided with a second reinforcing rib, which is formed by a partial downward indentation at the top of the longitudinal corrugation;

[0021] The second longitudinal corrugation is provided with a third reinforcing rib, which is formed by a partial downward indentation at the top of the second longitudinal corrugation.

[0022] In an optional embodiment, the bottom surfaces of the first reinforcing rib, the second reinforcing rib, and the third reinforcing rib are all arc surfaces, and the curvatures of the three are equal.

[0023] In an optional embodiment, the vertical distances from the forming axis of the first reinforcing rib formed on the transverse corrugations to the plane containing the smooth top surface, the vertical distances from the forming axis of the second reinforcing rib formed on the first longitudinal corrugations to the plane containing the smooth top surface, and the vertical distances from the forming axis of the third reinforcing rib formed on the second longitudinal corrugations to the plane containing the smooth top surface are all equal and constant; and / or

[0024] The forming axes of the two first reinforcing ribs formed on the transverse corrugations are in the first horizontal plane and parallel to the smooth top surface. The forming axes of the second reinforcing rib formed on the first longitudinal corrugations and the third reinforcing rib formed on the second longitudinal corrugations are in the second horizontal plane and parallel to the smooth top surface. The first horizontal plane and the second horizontal plane are not coplanar.

[0025] In an alternative embodiment, the lateral dimension of the smooth top surface is equal to its longitudinal dimension.

[0026] In an alternative embodiment, there are four contour lines on the smooth top surface that define the smooth top surface. Each of the four contour lines is concave inward towards the center of the smooth top surface at its central position, and the concave curvatures of the four contour lines are equal.

[0027] In an alternative embodiment, the minimum lateral dimension of the smooth top surface is equal to its minimum longitudinal dimension.

[0028] In an alternative embodiment, the first side surface where the smooth top surface is connected to the transverse corrugation is perpendicular to the projection plane defined by the transverse direction and the longitudinal direction; the second side surface where the smooth top surface is connected to the first longitudinal corrugation and the second longitudinal corrugation is perpendicular to the projection plane defined by the transverse direction and the longitudinal direction.

[0029] In an alternative embodiment, the transition fillet radius at the intersection of the smooth top surface with the first side surface and the second side surface, the transition fillet radii of the four draw beads with the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation respectively, and the transition fillet radius at the intersection of the four draw beads with the corrugated plate body are all equal.

[0030] In an alternative embodiment, the cross-section of the intersection part at the center of the intersection part in the plane defined by the transverse direction and the height direction is in a "J" shape, and the cross-section of the intersection part at the center of the intersection part in the plane defined by the longitudinal direction and the height direction is in a "J" shape.

[0031] In an alternative embodiment, the intersection part is symmetric about the plane defined by the longitudinal direction and the height direction, and symmetric about the plane defined by the transverse direction and the height direction; and / or

[0032] The two first reinforcing ribs formed on the transverse corrugation are symmetric about the plane defined by the longitudinal direction and the height direction; and / or

[0033] The second reinforcing rib formed on the first longitudinal corrugation and the third reinforcing rib formed on the second longitudinal corrugation are symmetric about the plane defined by the transverse direction and the height direction.

[0034] A liquefied gas storage tank includes the corrugated plate described in any of the above embodiments.

[0035] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows: The overall shape of the corrugated plate in the embodiments of the present application is smooth, and the shape performance is regular macroscopically, ensuring the strength and stability of the corrugated corner plate, fully realizing its structural role in the liquefied gas storage tank, providing a feasible implementation method for the airtight connection of the liquefied gas storage tank, and at the same time, meeting the performance requirements under its working environment conditions to a great extent.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this application.

[0037] The overview of various implementations or examples of the technology described in this application is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0038] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The drawings generally illustrate various embodiments by way of example rather than limitation and are used, together with the description and claims, to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0039] Figure 1 is a perspective view of the corrugated plate according to an embodiment of this application.

[0040] Figure 2 is a projection diagram of the corrugated plate of this application in a projection plane defined by the longitudinal direction and the height direction.

[0041] Figure 3 is a projection diagram of the corrugated plate of this application in a projection plane defined by the lateral direction and the height direction.

[0042] Figure 4 is a cross-sectional view taken from line AA in Figure 1.

[0043] Figure 5 is a cross-sectional view taken from line BB in Figure 1.

[0044] Figure 6 is a top view of the corrugated plate according to an embodiment of this application.

[0045] Figure 7 is a magnified view of the intersection in Figure 6.

[0046] Figure 8 is a cross-sectional view taken along line CC in Figure 6.

[0047] Figure 9 is a cross-sectional view taken along line DD in Figure 6. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0050] To keep the following description of the embodiments of this application clear and concise, detailed descriptions of known functions and known components are omitted.

[0051] This application provides a corrugated plate 200 for assembling liquefied gas tanks. Figures 1-9 show schematic diagrams of the corrugated plate 200 according to a preferred embodiment of this application.

[0052] First, it should be noted that the directional and positional terms mentioned in this application are merely illustrative descriptions and not limiting descriptions. Descriptions of the position and orientation of components should be understood as relative positions rather than absolute positions. Specifically, descriptions of the position and orientation of the corrugated plate 200 should be understood with reference to the positions and orientations of the components shown in Figures 1-9; in the positional descriptions, "lateral direction" is represented by D1, "longitudinal direction" by D2, and "height direction" by D3, with each of the three directions being perpendicular to the others.

[0053] Referring first to Figure 1, the corrugated plate 200 includes a corrugated plate body 20, transverse corrugations 30, longitudinal corrugations, reinforcing ribs, and a junction portion 60. The transverse corrugations 30 are formed on the corrugated plate body 20. The longitudinal corrugations include a first longitudinal corrugation 40 and a second longitudinal corrugation 50, both formed on the corrugated plate body 20 and located on opposite sides of the transverse corrugations 30. Reinforcing ribs are formed on the transverse corrugations 30, the first longitudinal corrugations 40, and the second longitudinal corrugations 50. The junction portion 60 is formed at the intersection of the transverse corrugations 30, the first longitudinal corrugations 40, and the second longitudinal corrugations 50.

[0054] It should be noted that, in describing the corrugated plate 200, the lateral direction D1 represents the extension direction of the lateral corrugations 30, the longitudinal direction D2 represents the direction perpendicular to the lateral direction D1 at the smooth top surface 61 of the confluence portion 60, and the height direction D3 represents the direction perpendicular to the smooth top surface 61 of the confluence portion 60. The confluence portion 60 is higher than the lateral corrugations 30, the first longitudinal corrugation 40, and the second longitudinal corrugation 50 in the height direction D3.

[0055] As shown in the top view of the intersection portion 60 in Figure 7, the intersection portion 60 includes a smooth top surface 61 and four draw bars 62 extending from the smooth top surface 61 to the corrugated plate body 20. Each draw bar 62 extends from the smooth top surface 61 and transitions smoothly, and continues to extend in the transverse direction D1, the longitudinal direction D2 and the height direction D3, and smoothly intersects with the transverse corrugation 30, the first longitudinal corrugation 40, the second longitudinal corrugation 50 and the corrugated plate body 20. As the draw bar 62 extends from the smooth top surface 61 to the corrugated plate body 20, the cross-sectional size of the cross section defined by the plane defined by the transverse direction D1 and the longitudinal direction D2 gradually increases.

[0056] In some embodiments, the corrugated plate body 20 is mirror-symmetrical about a plane defined by the transverse direction D1 and the height direction D3 at the center line of the ridge of the transverse corrugations 30 at the top of the transverse corrugations 30, and the two symmetrical planes are not on the same plane, that is, the outward normals of the two symmetrical planes form a certain angle. The outer sides of the two symmetrical planes curve upward at a certain angle, as shown in Figures 2 and 5. By designing the outer side of the corrugated plate body 20 to be curved, it is convenient that adjacent corrugated plates 200 can overlap each other to form an approximately circular tank body when assembled into a liquefied gas storage tank.

[0057] It is understandable that the portions of the corrugated plate body 20 located on opposite sides of the transverse corrugations 30 gradually curve upwards from the transverse corrugations 30 away from them, thus causing the first longitudinal corrugation 40 and the second longitudinal corrugation 50 to be not on the same straight line, but rather at a certain angle to each other. The first longitudinal corrugation 40 and the second longitudinal corrugation 50 are mirror-symmetrical about the transverse corrugations 30.

[0058] As shown in Figures 2 to 5, the cross-sectional shape of the transverse corrugation 30, when the plane defined by the longitudinal direction D2 and the height direction D3 is used as the cross-section, is a circular arch. The cross-sectional shapes of the first longitudinal corrugation 40 and the second longitudinal corrugation 50, when the plane defined by the transverse direction D1 and the height direction D3 is used as the cross-section, are both circular arches; and / or, the arch width W1 of the transverse corrugation 30, the arch width W2 of the first longitudinal corrugation 40, and the arch width W3 of the second longitudinal corrugation 50 are equal, i.e., W1 = W2 = W3, see Figures 3, 8, and 9; and / or, the arch height H1 of the transverse corrugation 30, the arch height H2 of the first longitudinal corrugation 40, and the arch height H3 of the second longitudinal corrugation 50 are all equal. The three corrugated sections 50 have the same arch height H3, i.e., H1 = H2 = H3 (see Figures 8 and 9); and / or, the arch width is twice the arch height; and / or, the radii of the arcs at the top ridges of the transverse corrugated section 30, the first longitudinal corrugated section 40, and the second longitudinal corrugated section 50 are equal, and the radii of the arcs on both sides of the bottom end of their respective arches are equal, and the cross-sectional dimensions of the transverse corrugated section 30, the first longitudinal corrugated section 40, and the second longitudinal corrugated section 50 all gradually taper from bottom to top in the height direction D3. This arrangement allows the stress variation and strain distribution of the corrugated plate 200 to be in an optimal state.

[0059] In some embodiments, as shown in FIG1, the transverse corrugations 30 are provided with first reinforcing ribs 31 on the portions on both sides of the intersection 60, and the first reinforcing ribs 31 are formed by a partial downward indentation at the top of the transverse corrugations 30. The first longitudinal corrugations 40 are provided with second reinforcing ribs 41, which are also formed by a partial downward indentation at the top of the first longitudinal corrugations 40. The second longitudinal corrugations 50 are provided with third reinforcing ribs 51, which are also formed by a partial downward indentation at the top of the second longitudinal corrugations 50.

[0060] Furthermore, as shown in Figures 4 and 5, the radii of the fillet 311 of the first reinforcing rib 31, the fillet 411 of the second reinforcing rib 41, and the fillet 511 of the third reinforcing rib 51 are equal. The bottom surfaces of the first reinforcing rib 31, the second reinforcing rib 41, and the third reinforcing rib 51 are all arc surfaces, and their curvatures are equal. The fillet radii of the first reinforcing rib 31, the second reinforcing rib 41, and the third reinforcing rib 51 are the same. While ensuring the consistency of the external dimensions of the four reinforcing ribs, and considering that the forming of the reinforcing ribs will not significantly affect the flow of the surrounding sheet material during the forming process of the corrugated plate 200.

[0061] In some embodiments, the vertical distances from the forming axis of the first reinforcing rib 31 formed on the transverse corrugation 30 to the plane containing the smooth top surface 61, the vertical distances from the forming axis of the second reinforcing rib 41 formed on the first longitudinal corrugation 40 to the plane containing the smooth top surface 61, and the vertical distances from the forming axis of the third reinforcing rib 51 formed on the second longitudinal corrugation 50 to the plane containing the smooth top surface 61 are all equal and constant, for example, 150 mm. The forming axes of the two first reinforcing ribs 31 formed on the transverse corrugation 30 are in the first horizontal plane and parallel to the smooth top surface 61, while the forming axes of the second reinforcing rib 41 formed on the first longitudinal corrugation 40 and the third reinforcing rib 51 formed on the second longitudinal corrugation 50 are in the second horizontal plane and parallel to the smooth top surface 61. The first and second horizontal planes are not coplanar. The forming axis refers to the axis of the circle containing the bottom arc of the reinforcing rib. By ensuring that the vertical distance from the axis of the bottom arc of the four reinforcing ribs to the smooth top surface 61 is equal, the reinforcing ribs formed on the corrugations provide the same stiffness constraint to the corrugations; at the same time, it is more beneficial to ensure the stability of the shape of the intermediate intersection part 60 after forming.

[0062] This embodiment of the application improves the rigidity and strength of the corrugated plate 200 after corrugation is formed by setting four reinforcing ribs on the transverse and longitudinal corrugations, and increases the surface area of ​​the assembled tank for absorbing and releasing energy. Moreover, during the injection and output of liquefied gas into the tank, the four reinforcing ribs further enhance the energy buffering effect of the corrugated plate 200. At the same time, the four reinforcing ribs formed on the transverse and longitudinal corrugations change the original cross-sectional shape of the corrugations, increase the cross-sectional area and local thickness of the plate, and thus improve the load-bearing capacity of the corrugated plate 200, that is, under the same external force, the stress value borne by the corrugations is reduced. While strengthening the rigidity and strength of the corrugations on the corrugated plate 200, the four reinforcing ribs further constrain the deformation of the intersection portion 60, that is, the intersection portion 60 is more stable and less prone to deformation after forming. As shown in Figures 2 and 3, the transverse dimension W3 of the smooth top surface 61 is equal to the longitudinal dimension W4. As shown in Figures 6 and 7, the smooth top surface 61 has four contour lines 68 defining the top surface. Each of the four contour lines 68 is concave towards the center of the smooth top surface 61 at its center position, and the concave curvature radii of the four contour lines 68 are the same. Meanwhile, as shown in Figure 7, the minimum lateral dimension W5 of the smooth top surface 61 is equal to the minimum longitudinal dimension W6. This makes the overall shape fuller and more aesthetically pleasing; it also benefits the stability of the shape of the central intersection portion 60; moreover, since the smooth top surface 61 is square, the constraint of the smooth top surface 61 on the surrounding sheet material is more uniform, thereby making the stress distribution of the central intersection portion 60 of the corrugated plate 200 more uniform.

[0063] As shown in FIGS. 2 and 3, the projection of the smooth top surface 61 of the intersection portion 60 in the projection plane defined by the transverse direction D1 and the height direction D3 is a straight line 63; the projection in the projection plane defined by the longitudinal direction D2 and the height direction D3 is a straight line 64, and the lengths of the two straight lines are the transverse dimension W3 and the longitudinal dimension W4 of the smooth top surface 61. Ensure that the smooth top surface 61 of the middle intersection portion 60 is a horizontal plane, and further ensure that this horizontal plane is parallel to the plane constrained by the forming axes of the bottom arc surfaces of the above-mentioned reinforcing ribs.

[0064] In some embodiments, as shown in FIG. 1, the first side surface 65 where the smooth top surface 61 is connected to the transverse corrugation 30 is perpendicular to the projection plane defined by the transverse direction D1 and the longitudinal direction D2; the second side surface 66 where the smooth top surface 61 is connected to the first longitudinal corrugation 40 and the second longitudinal corrugation 50 is also perpendicular to the projection plane defined by the transverse direction D1 and the longitudinal direction D2. Ensure the stability of the middle intersection portion 60 during the forming process and the stability of the shape of the intersection portion 60 after forming.

[0065] Optionally, the first side surface 65 and the second side surface 66 can also macroscopically show a concave shape, and the curvature radii of the two surfaces are equal.

[0066] The transition fillet radius at the intersection of the smooth top surface 61 of the intersection portion 60 with the first side surface 65 and the second side surface 66, the transition fillet radii of the four draw beads 62 of the intersection portion 60 with the transverse corrugation 30, the first longitudinal corrugation 40 and the second longitudinal corrugation 50 respectively, and the transition fillet radius at the intersection of the four draw beads 62 of the intersection portion 60 with the corrugated plate body 20 are all equal. Therefore, macroscopically, the intersection portion 60 has smooth transitions on the various curved surfaces at the intersection, and the overall shape is smooth and fluent, which greatly ensures the surface quality of the component.

[0067] As shown in FIGS. 4 and 5, the first cross-section 610 at the center of the intersection portion 60 of the corrugated plate 200 in the plane defined by the transverse direction D1 and the height direction D3 is in a "V" shape, and the second cross-section 611 at the center of the intersection portion 60 in the plane defined by the longitudinal direction D2 and the height direction D3 is in a "V" shape. Under actual and defined working conditions, it is more conducive to the absorption and release of energy, thereby ensuring the service performance stability of the corrugated plate 200 under defined working conditions; at the same time, restricting the corrugated plate

[0068] 200 from being easily deformed (especially the middle intersection portion 60).

[0068] As shown in Figures 6 and 7, the confluence portion 60 is symmetrical about a plane defined by the longitudinal direction D2 and the height direction D3 at the center of the confluence portion 60, and about a plane defined by the transverse direction D1 and the height direction D3; and / or, the two first reinforcing ribs 31 formed on the transverse corrugation 30 are symmetrical about a plane defined by the longitudinal direction D2 and the height direction D3 at the center of the confluence portion 60; and / or, the second reinforcing rib 41 formed on the first longitudinal corrugation 40 and the third reinforcing rib 51 formed on the second longitudinal corrugation 50 are symmetrical about a plane defined by the transverse direction D1 and the height direction D3.

[0069] As shown in Figures 1, 6 and 7, there are two first reinforcing ribs 31 on the transverse corrugation 30, and the two first reinforcing ribs 31 are located on both sides of the intersection portion 60 and are close to the intersection portion 60; a second reinforcing rib 41 is provided on the first longitudinal corrugation 40, and a third reinforcing rib 51 is provided on the second longitudinal corrugation 50. The second reinforcing rib 41 and the third reinforcing rib 51 are also close to the intersection portion 60.

[0070] As shown in Figures 6 and 7, the main body of each drawbead 62 in the intersection portion 60 extends along the direction intersecting with the first longitudinal corrugation 40, the second longitudinal corrugation 50, and the transverse corrugation 30, and transitions smoothly; wherein each drawbead 62 intersects with the corrugated plate body 20 and extends along the plane, and transitions smoothly.

[0071] As shown in Figures 1 and 7, the radii of curvature of the projected curves (projections onto the plane formed by the center lines of the diagonal ridges) at the ridges 67 of the four drawbeams 62 in the confluence portion 60 are equal. Simultaneously, the fillet radii at the ridges 67 of the four drawbeams 62 in the confluence portion 60 are constant and equal (e.g., fillet radii of 15–20 mm). Viewed from above in the plane defined by the transverse direction D1 and the longitudinal direction D2, the angle between the center lines of two adjacent drawbeam 62 ridges is approximately 60°.

[0072] Referring to the above embodiments, it can be seen that the corrugated plate 200 of this application embodiment has a smooth and fluid overall shape, and the corrugations formed on the corrugated plate 200 and the corrugation intersection 60 fully ensure the energy absorption and release function of the component in the application environment.

[0073] Meanwhile, the corrugations formed on the corrugated plate 200 and the confluence of the corrugations 60, as specific and special positions on the corrugated plate 200, also have rapid material deformation, which to a certain extent fully ensures the overall strength and stability of the corrugated plate 200, and can also exhibit good elasticity, shrinkage capacity and tension.

[0074] Meanwhile, the reinforcing ribs formed on the corrugations increase the surface area of ​​the corrugated plate 200 in contact with the liquefied gas, and also increase the local cross-sectional area on the corrugations, thereby further enhancing the strength and rigidity of the corrugations and the corrugated plate 200.

[0075] Based on this, the shape and performance stability of the corrugated plate 200 after forming are guaranteed.

[0076] This application also provides a liquefied gas storage tank, which includes the corrugated plate 200 as described in any of the above embodiments. The corrugated plate 200, in conjunction with other components, is assembled into a tank for storing liquefied gas.

[0077] Liquefied gas storage tanks can be used to store substances such as liquid hydrogen and liquefied natural gas.

[0078] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A corrugated plate of a liquefied gas storage tank, comprising a corrugated plate main body, characterized by, Also included are: a transverse corrugation formed on the corrugated plate body; a longitudinal corrugation formed on the corrugated plate body and including a first longitudinal corrugation and a second longitudinal corrugation respectively located on opposite sides of the transverse corrugation; a reinforcing rib formed on the transverse corrugation, the first longitudinal corrugation and the second longitudinal corrugation respectively; a junction portion formed at the intersection of the transverse corrugation, the first longitudinal corrugation and the second longitudinal corrugation.

2. The corrugated sheet for a liquefied gas storage tank according to claim 1, characterized by The junction portion includes a smooth top surface and four draw beads extending from the smooth top surface to the corrugated plate body, wherein each draw bead extends from the smooth top surface and smoothly transitions, and continues to extend in the transverse direction, the longitudinal direction and the height direction, and smoothly intersects with the transverse corrugation, the longitudinal corrugation and the corrugated plate body, and the draw bead gradually increases in cross-sectional size in the process of extending from the smooth top surface to the corrugated plate body.

3. The corrugated sheet for a liquefied gas storage tank according to claim 1, characterized by The corrugated plate body is mirror-symmetric about a plane defined by the transverse direction and the height direction at the center line of the transverse corrugation ridge at the top of the transverse corrugation, and the outer normal of the symmetric two-part plane is at an angle; the outer side of the symmetric two-part plane is at an angle and rises upward.

4. The corrugated sheet for a liquefied gas storage tank according to claim 1, characterized by The transverse corrugation has a circular arch shape in cross-sectional shape obtained by taking a plane defined by the longitudinal direction and the height direction as a cross section; the first longitudinal corrugation and the second longitudinal corrugation each have a circular arch shape in cross-sectional shape obtained by taking a plane defined by the transverse direction and the height direction as a cross section; and / or The arch width dimension of the transverse corrugation, the arch width dimension of the first longitudinal corrugation and the arch width dimension of the second longitudinal corrugation are equal; and / or The arch height dimension of the transverse corrugation, the arch height dimension of the first longitudinal corrugation and the arch height dimension of the second longitudinal corrugation are equal; and / or The arch width dimension is 2 times the arch height dimension; and / or The circular arc radii of the transverse corrugation, the first longitudinal corrugation and the second longitudinal corrugation at the respective top ridges are equal, and the circular arc radii on both sides of the respective arch bottom ends are equal, and the cross-sectional sizes of the transverse corrugation, the first longitudinal corrugation and the second longitudinal corrugation each exhibit a gradual contraction from bottom to top in the height direction.

5. The corrugated panel of a liquefied gas storage tank according to claim 1, characterized by The transverse corrugation is provided with a first reinforcing rib on the portion located on both sides of the junction portion, and the first reinforcing rib is formed by partially recessing downward from the top end of the transverse corrugation; The first longitudinal corrugation is provided with a second reinforcing rib, and the second reinforcing rib is formed by partially recessing downward from the top end of the longitudinal corrugation; The second longitudinal corrugation is provided with a third reinforcing rib, and the third reinforcing rib is formed by partially recessing downward from the top end of the second longitudinal corrugation.

6. The corrugated panel of a liquefied gas tank according to claim 5, characterized in that, The bottom surfaces of the first reinforcing rib, the second reinforcing rib and the third reinforcing rib are each a circular arc surface, and the curvatures of the three are equal.

7. The corrugated panel of a liquefied gas tank according to claim 5, wherein The perpendicular distance from the forming axis of the first reinforcing rib formed on the transverse corrugation to the plane where the smooth top surface is located, the perpendicular distance from the forming axis of the second reinforcing rib formed on the first longitudinal corrugation to the plane where the smooth top surface is located, and the perpendicular distance from the forming axis of the third reinforcing rib formed on the second longitudinal corrugation to the plane where the smooth top surface is located are equal and are a fixed value; and / or The forming axes of the two first reinforcing ribs formed on the transverse corrugation are in a first horizontal plane and parallel to the smooth top surface, the forming axis of the second reinforcing rib formed on the first longitudinal corrugation and the forming axis of the third reinforcing rib formed on the second longitudinal corrugation are in a second horizontal plane and parallel to the smooth top surface, and the first horizontal plane and the second horizontal plane are not coplanar.

8. The corrugated panel of a liquefied gas storage tank according to claim 1, characterized by The transverse dimension of the smooth top surface is equal to its longitudinal dimension.

9. The corrugated panel of a liquefied gas tank according to claim 1, wherein There are four contour lines defining the smooth top surface on the smooth top surface, and each of the four contour lines is concave inward toward the center of the smooth top surface at its center position, and the concave curvatures of the four contour lines are equal.

10. The corrugated panel of a liquefied gas storage tank according to claim 1, characterized by The minimum transverse dimension of the smooth top surface is equal to its minimum longitudinal dimension.

11. Corrugated sheet according to any one of claims 2 to 10, characterized in that The first side surface where the smooth top surface is connected to the transverse corrugation is perpendicular to the projection plane defined by the transverse direction and the longitudinal direction; the second side surface where the smooth top surface is connected to the first longitudinal corrugation and the second longitudinal corrugation is perpendicular to the projection plane defined by the transverse direction and the longitudinal direction.

12. The corrugated sheet according to claim 11, characterized in that The transition fillet radius at the intersection of the smooth top surface with the first side surface and the second side surface, the transition fillet radii of the four draw beads with the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation respectively, and the transition fillet radius at the intersection of the four draw beads with the corrugated plate body are all equal.

13. The corrugated sheet of claim 1, wherein The cross-section of the intersection part at the center of the intersection part in the plane defined by the transverse direction and the height direction is in a "J" shape, and the cross-section of the intersection part at the center of the intersection part in the plane defined by the longitudinal direction and the height direction is in a "J" shape.

14. The corrugated sheet according to any one of claim 5, wherein The intersection part is symmetric about the plane defined by the longitudinal direction and the height direction, and symmetric about the plane defined by the transverse direction and the height direction; and / or The two first reinforcing ribs formed on the transverse corrugation are symmetric about the plane defined by the longitudinal direction and the height direction; and / or The second reinforcing rib formed on the first longitudinal corrugation and the third reinforcing rib formed on the second longitudinal corrugation are symmetric about the plane defined by the transverse direction and the height direction.

15. A liquefied gas storage tank characterized by comprising: Comprising the corrugated plate according to any one of claims 1 to 14.

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