Metal corrugated plate with notch portions and storage container

Abstract

A metal corrugated plate (100) with notch portions. A middle section (32) of a transverse corrugation (30) of the metal corrugated plate (100) comprises a central ridge (321) located at the very center in a transverse direction and extending in a longitudinal direction, and the metal corrugated plate (100) has the maximum height at the central ridge (321); and the middle section (32) further comprises notch portions (322) respectively located on two sides of a longitudinal corrugation (20), wherein each notch portion (322) forms a groove extending in the longitudinal direction, and each groove comprises a groove bottom wall (3223) and groove side walls (3222) on two transverse sides of the groove bottom wall (3223), the groove bottom wall (3223) being the lowest portion of the top surface of the transverse corrugation (30). A corrugated plate body (10) is divided into four complete and regular rectangular sections by means of the transverse corrugation (30) and the longitudinal corrugation (20). In the structure, the pattern of the intersection of the transverse and longitudinal corrugations is mainly formed on the transverse corrugation, that is to say, the feature structure of the intersection obviously forms a part of the transverse corrugation, and has a clear boundary with the longitudinal corrugation.

Description

Corrugated metal sheet with cutouts and storage container Technical Field

[0001] The present invention relates to the field of liquefied gas storage tanks of marine engineering equipment, especially ships and other marine equipment, and in particular to a metal corrugated plate with a cutout portion and a storage container containing the corrugated plate. Background Art

[0002] LNG (liquefied natural gas) is typically transported via marine equipment, such as ships. An LNG receiving terminal primarily consists of dock unloading, LNG storage, processing, and export. LNG storage tanks, responsible for storage, are the longest construction period, require the most advanced technology, and present the most challenges. They are therefore managed as the critical path of the entire project.

[0003] In LNG storage tanks, the corrugated metal sheets used to form the sealing layer must maintain excellent sealing and stability under various operating conditions. Therefore, the configuration and quality of the corrugated metal sheets are particularly important. Existing corrugated metal sheets lack uniformity, smoothness, and strength at the corrugations, particularly at the intersection of the horizontal and vertical corrugations.

[0004] Therefore, it is necessary to provide a corrugated metal plate and a storage container having the same to at least partially solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal corrugated plate having a cutout portion and a storage container having the corrugated plate. The general shape of the intersection of the transverse and longitudinal corrugations of the metal corrugated plate of the present invention is determined by an intermediate step between the step of processing the longitudinal corrugations and the step of processing the transverse corrugations. Specifically, after processing the transverse corrugations, the characteristic structure of the intersection is processed on the transverse corrugations, and then the longitudinal corrugations are processed. In the corrugated plate processed by such steps, the shape of the intersection is mainly formed on the transverse corrugations, that is, the characteristic structure of the intersection clearly constitutes a part of the transverse corrugations, and has a clear boundary with the longitudinal corrugations.

[0006] In addition, pre-pressing pattern features on the transverse corrugations can improve the structural stability and shape controllability of the intersection portion formed in the final shape when processing the longitudinal corrugations, so that the final processed corrugated plate, that is, the corrugated plate of the present invention, can provide better tensile strength, strength and stability in multiple directions. Some structures of the corrugated plate of the present invention not only play a practical role in the corrugated plate, but also have unique functions in its processing technology. For example, the deformation of the cutout portion is relatively rapid and very standard and symmetrical, which can provide the corrugated plate with good and uniform tensile deformation; at the same time, the cutout portion is pre-processed on the transverse corrugation before the longitudinal corrugation is formed in the processing technology, so that when processing the longitudinal corrugation, the cutout portion can be used as a bite mechanism with the mold to prevent the corrugated plate and the mold from shifting relative to each other.

[0007] The present invention provides a metal corrugated plate with a cutout portion, the metal corrugated plate comprising a corrugated plate body, longitudinal corrugations and transverse corrugations formed on the corrugated plate body and arranged crosswise, the transverse corrugations comprising a main section and an intermediate section spanning the longitudinal corrugations, the height of the longitudinal corrugations being less than the height of the main section, and the maximum transverse dimension of the longitudinal corrugations being less than the maximum longitudinal dimension of the main section, wherein the intermediate section comprises a central ridge located at the transverse center and extending longitudinally, the metal corrugated plate having a maximum height at the central ridge, and the intermediate section further comprises cutout portions located on both sides of the longitudinal corrugations, each of the cutout portions constituting a groove extending in the longitudinal direction, each of the grooves comprising a groove bottom wall and groove sidewalls on both transverse sides of the groove bottom wall, the groove bottom wall forming the lowest point of the top surface of the transverse corrugation, and, in a top view perpendicular to the corrugated plate body, the corrugated plate body is divided into four complete and regular rectangular sections by the transverse corrugations and the longitudinal corrugations.

[0008] In one embodiment, the side walls on both longitudinal sides of the central ridge are concave inwards in the longitudinal direction, thereby forming an innermost concave point of the side wall, and the innermost concave point is located at the top of the longitudinal corrugation.

[0009] In one embodiment, the projection profile of the side wall in a projection plane perpendicular to the longitudinal direction is a triangle.

[0010] In one embodiment, a longitudinal dimension of the groove bottom wall of the cutout portion is equal to or smaller than a longitudinal dimension of a section of the transverse corrugation below the cutout portion.

[0011] In one embodiment, there are pits on both lateral sides of the central ridge, each of the pits is an elongated pit extending in the longitudinal direction, and the longitudinal dimension of each of the pits is equal to the longitudinal dimension of the central ridge.

[0012] In one embodiment, the pit is located between the two cutouts, and a longitudinal dimension of the pit is smaller than a longitudinal dimension of the cutout, and a depth of the pit is smaller than a depth of the cutout.

[0013] In one embodiment, the groove bottom wall and the top of the longitudinal corrugation are located in the same plane parallel to the corrugated plate body.

[0014] In one embodiment, the tops of the groove side walls located on both lateral sides of the groove bottom wall are flush with each other and are also flush with the top of the main body section.

[0015] In one embodiment, two elongated ribs extend from both ends of the central ridge toward the corrugated board body, and each of the elongated ribs terminates at a side surface of the transverse corrugation without reaching the corrugated board body.

[0016] In one embodiment, the transverse corrugations have a maximum longitudinal dimension at the bottom end of the elongate rib.

[0017] According to another aspect of the present invention, a liquefied gas storage container is provided, comprising a container wall body and a sealing layer located inside the container wall body, wherein the sealing layer comprises the corrugated metal plate according to any one of the above solutions.

[0018] In one embodiment, the storage container is a marine liquefied gas storage container or a land-based cryogenic liquid storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To better understand 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. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to illustrate preferred embodiments of the present invention by way of illustration and are not intended to limit the scope of the present invention. The components in the drawings are not drawn to scale.

[0020] FIG1 is a perspective view of a metal corrugated plate according to a preferred embodiment of the present invention.

[0021] FIG2 is a three-dimensional view of a metal corrugated plate from another viewing angle;

[0022] FIG3 is a side view of the corrugated metal plate viewed in the transverse direction;

[0023] FIG4 is a side view of the metal corrugated plate viewed along the longitudinal direction;

[0024] FIG5 is a top view of a corrugated metal plate.

[0025] Reference numerals:

[0026] 100 corrugated metal sheet

[0027] 10Corrugated plate body

[0028] 11 rectangular segments

[0029] 20 longitudinal corrugation

[0030] 30 horizontal corrugation

[0031] 31 Main section

[0032] 32 middle section

[0033] 321 Center Ridge

[0034] 322 incision

[0035] 3221 The longitudinal ends of the groove bottom wall

[0036] 3222 groove sidewall

[0037] 3223 groove bottom wall

[0038] 323 pits

[0039] 324 sidewall

[0040] 325 elongation tendons

[0041] 326 bottom end

[0042] 327 The section below the cutout

[0043] 21 The top of the longitudinal corrugation. DETAILED DESCRIPTION

[0044] The present invention provides a corrugated metal sheet for use in a liquefied gas storage tank for marine or land-based engineering equipment, and a liquefied gas storage container having the corrugated metal sheet. The storage container is a marine equipment liquefied gas storage container or a land-based cryogenic liquid freezing device. Figures 1-5 show schematic diagrams of a corrugated metal sheet according to a preferred embodiment of the present invention.

[0045] First of all, it should be noted that the directional terms and positional terms mentioned in the present invention are only exemplary descriptions and not restrictive descriptions. The description of the position of the component should be understood as a relative position rather than an absolute position, and the description of the extension direction of the component should be understood as a relative direction rather than an absolute direction. Among them, the directional terms and positional terms related to the metal corrugated plate can be understood with reference to the position and direction of each component shown in Figures 1 to 5. For example, the terms "top side", "upward", "bottom side", "downward" and so on can be explained with reference to the placement orientation of the metal corrugated plate shown in Figures 1 to 5; "transverse direction" and "longitudinal direction" are two directions perpendicular to each other, where the transverse direction is shown by D2 and the longitudinal direction is shown by D1. The transverse direction D2 and the longitudinal direction D1 together define the extension plane of the corrugated plate body of the metal corrugated plate. The height direction is the direction perpendicular to the corrugated plate body 10.

[0046] First, referring to Figure 1, a corrugated metal sheet 100 comprises a flat corrugated sheet body 10, transverse corrugations 30 formed on the corrugated sheet body 10, and longitudinal corrugations 20. The longitudinal corrugations 20 of the corrugated metal sheet 100 refer to corrugations extending along the longitudinal direction D1, while the transverse corrugations 30 refer to corrugations extending along the transverse direction D2. In the embodiments shown in Figures 1-5, the longitudinal dimensions of the transverse corrugations 30 taper from bottom to top, while the transverse dimensions of the longitudinal corrugations 20 taper from bottom to top. Furthermore, the height of the longitudinal corrugations 20 is smaller than the height of the transverse corrugations 30, and the maximum transverse dimension of the longitudinal corrugations 20 is smaller than the maximum longitudinal dimension of the main body of the transverse corrugations 30. In other words, transverse corrugations are large corrugations, while longitudinal corrugations are small corrugations. The height of the longitudinal corrugations 20 and transverse corrugations 30 refers to the height distance between the top of the corrugation and the corrugated sheet body 10.

[0047] In this embodiment, both the transverse corrugations 30 and the longitudinal corrugations 20 are arc-shaped. For example, in the side view shown in FIG3 and the side view shown in FIG4 , the side view profile (also referred to as the projected profile) of the transverse corrugations 30 and the longitudinal corrugations 20 is formed in an arc shape, and their respective tops are formed in an arc shape without sharp corners. In other embodiments not shown, the transverse corrugations 30 and / or the longitudinal corrugations 20 may be formed in a triangular shape. For example, in their respective cross-sections (the cross-sections being perpendicular to the direction of extension of the corrugations), the cross-sectional profile of the corrugations is formed into a substantially triangular shape, that is, their tops may have sharp corners.

[0048] Referring to Figures 1 and 2 , the transverse corrugations 30 include a main section 31 and a middle section 32 that spans the longitudinal corrugations 20. The middle section 32 includes a central ridge 321 located at the transversely most central point and extending longitudinally. The central ridge 321 forms a short, slender, raised structure. The corrugated metal sheet 100 reaches its maximum height at the central ridge 321 (see Figure 4 ). The middle section 32 also includes cutouts 322 located on either side of the longitudinal corrugations. Each cutout 322 forms a groove extending in the longitudinal direction. Each groove includes a bottom wall 3223 and sidewalls 3222 on either side of the bottom wall 3223. The bottom wall 3223 forms the lowest point on the top surface of the transverse corrugations 30 (see Figure 4 ).

[0049] With reference to Figures 3 and 5 , the longitudinal dimension of the groove bottom wall 3223 of the cutout portion 322 is equal to or smaller than the longitudinal dimension of the transverse corrugation section 327 below the cutout portion. In other words, the longitudinal ends 3221 of the groove bottom wall (see Figure 3 ) do not protrude longitudinally relative to the rest of the transverse corrugation and do not form a noticeable longitudinal bulge.

[0050] Referring to Figures 4 and 5 , the tops of the two groove sidewalls 3222 located on either side of the groove bottom wall 3223 are flush, that is, the tops of the two groove sidewalls 3222 are at the same height. The two groove sidewalls 3222 are preferably symmetrical about the groove bottom wall 3223, so that tensile deformation around the cutout portion 322 is relatively uniform. Preferably, the two groove sidewalls 3222 are flush with the tops of the main body section 31 of the transverse corrugation, allowing the cutout portion 322 to smoothly transition from its groove sidewalls 3222 to the main body section 31, with no upward protrusion at the junction between the main body section 31 and the cutout portion 322. This arrangement gives the corrugated plate a smooth outer profile and improved stability during use.

[0051] Continuing to refer to Figures 4 and 5, the groove bottom wall 3223 and the top 21 of the longitudinal corrugation are located in the same plane parallel to the corrugated plate body 10. In other words, the groove bottom wall 3223 and the top 21 of the longitudinal corrugation are at approximately the same height. Alternatively, the groove bottom wall 3223 can also be slightly higher than the top 21 of the longitudinal corrugation. This arrangement shows that the cutout portion 322 has a large depth, which can provide the corrugated plate with good tensile properties. This large depth allows the cutout portion 322 to engage with the shaping mold during the forming process of the longitudinal corrugations 20 in the corrugated plate forming process, thereby facilitating the positioning of the metal corrugated plate 100, preventing the metal corrugated plate 100 from shifting relative to the mold, and helping the corrugated plate to be formed more accurately according to the pre-set conditions.

[0052] Referring to Figures 1, 2, and 4, the sidewalls 324 on either side of the central ridge 321 are concave inward in the longitudinal direction, thereby forming the innermost concave point of the sidewalls 324. This innermost concave point is located at the top 21 of the longitudinal corrugation (i.e., the topmost point of the longitudinal corrugation 20). Consequently, the intersection of the sidewalls 324 and the top 21 of the longitudinal corrugation constitutes the innermost concave point of the sidewalls 324. The distance between the innermost concave points of the two sidewalls 324 constitutes the minimum longitudinal dimension of the entire transverse corrugation 30. Before the longitudinal corrugations 20 are machined, the concave sidewalls 324 have only a slightly concave shape. Machining the longitudinal corrugations 20 exacerbates this concave shape, resulting in a corrugated metal sheet 100 that can meet more stringent deformation requirements.

[0053] Preferably, the sidewall 324 is triangular in shape when viewed from the side along the longitudinal direction, or in other words, the projected profile of the sidewall 324 in a plane perpendicular to the longitudinal direction is approximately triangular. Two elongated ribs 325 extend from each end of the central ridge 321 toward the corrugated sheet body 10. The two elongated ribs 325 extending from the same end of the central ridge 321 generally form two sides of the triangle formed by the projected profile of the sidewall 324. Unlike conventional elongated ribs 325 that extend into the corrugated sheet body 10, each elongated rib 325 terminates at the side surface of the transverse corrugation 30, rather than reaching the sheet body 10. Figures 1-3 show the bottom ends 326 of the elongated ribs 325, which converge onto the transverse corrugations 30. The transverse corrugations 30 bulge slightly longitudinally at the ends of the elongated ribs 325, resulting in the transverse corrugations 30 having their maximum longitudinal dimension at the bottom ends 326 of the elongated ribs 325, as more clearly shown in Figure 3.

[0054] The provision of the elongation ribs 325 allows the corrugated plate to have a slightly more abrupt deformation section while preventing the elongation ribs 325 from damaging the shape of the corrugated plate body 10. Because the elongation ribs 325 do not extend to the corrugated plate body 10, in a top-down perspective perpendicular to the corrugated plate body 10 as shown in FIG5 , the corrugated plate body 10 is divided into four complete and regular rectangular sections 11 by the transverse and longitudinal corrugations. The corners of each rectangular section 11 near the intersection of the transverse and longitudinal corrugations are also regular right angles, and these corners are not covered by the intersection feature structure. In other embodiments not shown, to ensure that the corrugated plate body 10 can be divided into four complete and regular rectangular sections 11, the elongation ribs may not be provided in the middle section 32 of the transverse corrugations 30.

[0055] Referring to Figures 1, 2, and 4, a central ridge 321 is provided with concave recesses 323 on either side. Each concave recess 323 is a short, elongated recess extending longitudinally. Referring to Figure 5, the longitudinal dimension of each concave recess 323 can be equal to the longitudinal dimension of the central ridge 321. The central ridge 321 and the pair of concave recesses 323 both extend longitudinally and have equal longitudinal dimensions. The central ridge 321 is sandwiched between the pair of concave recesses 323, with the central ridge 321 protruding upward and the pair of concave recesses 323 recessed downward. This configuration is particularly suitable for the very center of the corrugated metal sheet 100. It should be noted that the stretching experienced at the very center of the corrugated metal sheet 100 may not be intense but may occur very frequently. This smaller, symmetrically arranged concave-convex structure can accommodate this intense, yet less intense, stretching requirement.

[0056] The sidewall 324, the elongated rib 325, the recess 323 and other structures are all located laterally between the pair of cutouts 322. The longitudinal dimension of the recess 323 is smaller than the longitudinal dimension of the cutout 322, and the depth of the recess 323 is smaller than the depth of the cutout 322.

[0057] The general shape of the intersection of the transverse and longitudinal corrugations (i.e., the intermediate section 32) of the corrugated metal sheet 100 of the present invention is determined by the intermediate step between the steps of forming the longitudinal corrugations 20 and the transverse corrugations 30. Specifically, the characteristic structure of the intersection is machined into the transverse corrugations 30 after the transverse corrugations 30 are machined, and then the longitudinal corrugations 20 are machined. In the corrugated sheet produced by this process, the shape of the intersection is primarily formed in the transverse corrugations. In other words, the characteristic structure of the intersection clearly constitutes a part of the transverse corrugations, and has a clear boundary with the longitudinal corrugations.

[0058] In addition, pre-pressing characteristic structures into the transverse corrugations 30 can improve the structural stability and shape controllability of the final intersection formed when processing the longitudinal corrugations 20, so that the final processed corrugated plate, that is, the corrugated plate of the present invention, can provide better tensile strength, strength, and stability in multiple directions. Some structures of the corrugated plate of the present invention not only play a practical role in the corrugated plate, but also have unique functions in its processing. For example, the deformation of the cutout portion 322 is relatively rapid and very standardly symmetrically arranged, which can provide the corrugated plate with excellent and uniform tensile deformation. At the same time, the cutout portion 322 is pre-processed into the transverse corrugations 30 before the longitudinal corrugations 20 are formed. Therefore, when processing the longitudinal corrugations 20, the cutout portion 322 can serve as a meshing mechanism with the mold, preventing relative displacement between the corrugated plate and the mold, and also reducing the thinning rate of the metal corrugated plate, resulting in a metal corrugated plate with superior performance.

[0059] The present invention also provides a storage container comprising a container wall body and a sealing layer located inside the container wall body. A corrugated metal sheet 100, as shown in Figures 1-5 , can be used as the sealing layer of the storage container. The storage container is, for example, a liquefied gas storage tank on marine equipment such as a ship, or a storage tank on land-based cryogenic transportation equipment, where the liquefied gas includes, for example, liquefied natural gas, liquid nitrogen, liquid oxygen, liquid hydrogen, or liquid helium.

[0060] The above description of various embodiments of the present invention is provided for the purpose of description to one of ordinary skill in the relevant art. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As above, a person of ordinary skill in the field of the above teachings will understand the various substitutions and variations of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all substitutions, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

Claims

1. A metal corrugated plate (100) having a cutout portion, the metal corrugated plate comprising a corrugated plate body (10), longitudinal corrugations (20) and transverse corrugations (30) formed on the corrugated plate body and arranged crosswise, the transverse corrugations (30) comprising a main body section (31) and an intermediate section (32) spanning the longitudinal corrugations (20), the height of the longitudinal corrugations being smaller than the height of the main body section, and the maximum transverse dimension of the longitudinal corrugations being smaller than the maximum longitudinal dimension of the main body section, in, The middle section (32) includes a central ridge (321) located at the center in the transverse direction and extending in the longitudinal direction, and the metal corrugated plate has a maximum height at the central ridge. The middle section (32) also includes cutouts (322) located on both sides of the longitudinal corrugation, each of which constitutes a groove extending in the longitudinal direction. Each of the grooves includes a groove bottom wall (3223) and groove side walls (3222) on both sides of the groove bottom wall in the transverse direction. The groove bottom wall forms the lowest point of the top surface of the transverse corrugation. Furthermore, two elongated ribs (325) extend from both ends of the central ridge (321) toward the corrugated board body, and each of the elongated ribs (325) terminates at the side surface of the transverse corrugation (30) without reaching the corrugated board body (10), so that in a top view perpendicular to the corrugated board body, the corrugated board body (10) is divided into four complete and regular rectangular sections (11) by the transverse corrugations and the longitudinal corrugations.

2. The metal corrugated sheet according to claim 1, It is characterized in that The side walls (324) on both longitudinal sides of the central ridge (321) are concave inwards in the longitudinal direction, thereby forming the innermost concave point of the side wall, and the innermost concave point is located at the top (21) of the longitudinal corrugation.

3. The metal corrugated sheet according to claim 2, It is characterized in that The projection profile of the side wall (324) in a projection plane perpendicular to the longitudinal direction is a triangle.

4. The metal corrugated sheet according to claim 1, It is characterized in that The longitudinal dimension of the groove bottom wall (3223) of the cutout portion is equal to or smaller than the longitudinal dimension of the section (327) of the transverse corrugation below the cutout portion.

5. The corrugated metal sheet according to claim 1, It is characterized in that The central ridge (321) has pits (323) on both sides in the transverse direction, each of the pits (323) is an elongated pit extending in the longitudinal direction, and the longitudinal dimension of each of the pits (323) is equal to the longitudinal dimension of the central ridge (321).

6. The metal corrugated sheet according to claim 5, It is characterized in that The pit (323) is located between the two cutout portions (322), and the longitudinal dimension of the pit is smaller than the longitudinal dimension of the cutout portion, and the depth of the pit is smaller than the depth of the cutout portion.

7. The metal corrugated sheet according to claim 1, It is characterized in that The groove bottom wall (3223) and the top (21) of the longitudinal corrugation are located in the same plane parallel to the corrugated plate body (10).

8. The corrugated metal sheet according to claim 1, It is characterized in that The tops of the groove side walls (3222) located on both lateral sides of the groove bottom wall (3223) are flush with each other and are also flush with the top of the main body section (31).

9. The corrugated metal sheet according to claim 1, It is characterized in that The transverse corrugations (30) have a maximum longitudinal dimension at the bottom end (326) of the elongated rib (325).

10. A storage container for liquefied gas, the storage container comprising a container wall body and a sealing layer located inside the container wall body, It is characterized in that The sealing layer comprises the corrugated metal sheet according to any one of claims 1-9.

11. The storage container according to claim 10, It is characterized in that The storage container is a marine equipment liquefied gas storage container or a land-based low-temperature freezing liquid device.

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