CN116658798A

CN116658798A - Sealing layer with central ridge section and storage device

Info

Publication number: CN116658798A
Application number: CN202310808848.6A
Authority: CN
Inventors: 李凤奇; 李明; 张健; 魏颖; 陈世福; 冯宪高; 何炜; 王康; 张金林; 尹青锋; 吴皓
Original assignee: China Pacific Maritime Technology Shanghai Co ltd; Sinopec Engineering Inc
Current assignee: China Pacific Maritime Technology Shanghai Co ltd; Sinopec Engineering Inc
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2023-08-29

Abstract

The invention discloses a sealing layer with a central ridge section and a storage device. The sealing layer has a second horizontal corrugation, a first horizontal corrugation and an intersection of the two corrugations. The intersection portion has a ridge section spanning a second horizontal corrugation, a dimension in a second horizontal direction at a mid-position of the ridge section being smaller than a dimension in a first horizontal direction at a top of the second horizontal corrugation and smaller than a dimension in the second horizontal direction at the top of the first horizontal corrugation, a height of the ridge section being greater than a height of the first horizontal corrugation. The sealing layer provided by the invention has relatively sharp material deformation at the central position, so that the shrinkage capacity, elasticity and tension of the sealing layer are relatively good.

Description

Sealing layer with central ridge section and storage device

Technical Field

The present invention relates to the field of liquefied gas storage tanks for marine engineering equipment, particularly marine equipment such as ships, and more particularly to a seal layer and a storage device for a liquefied gas storage tank for transportation equipment, particularly marine equipment such as ships.

Background

Liquefied natural gas, which is recognized as the cleanest fossil energy source on earth, is colorless, odorless, nontoxic, and noncorrosive. The manufacturing process is that the natural gas produced by the gas field is purified and transported by the liquefied natural gas ship after a series of ultralow temperature liquefaction. After burning, the liquefied natural gas has very little pollution to air and emits large heat, so the liquefied natural gas is an advanced energy source.

Liquefied natural gas is a liquid from natural gas after it is compressed and cooled to its freezing point, and is typically stored in cryogenic storage tanks. The main component is methane, and the methane is transported by a special ship or an oil tank truck and is regasified during use. The world lng production and trade volume has increased rapidly since the 70 s of the 20 th century.

In a storage device for storing liquefied natural gas, the performance of the sealing layer inside thereof is critical to the storage characteristics of the container. The conventional sealing layers have certain defects such as sealing property, ductility and the like.

Thus, there is a need to provide a sealing layer and a memory device to at least partially solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a sealing layer and a storage device. The sealing layer provided by the invention has relatively sharp material deformation at the central position, so that the shrinkage capacity, elasticity and tension of the sealing layer are relatively good. And the intersection portion protrudes upward from both corrugations at the center position and protrudes from the first horizontal corrugation in the second horizontal direction at the side sections, such arrangement further provides a larger amount of deformability, further enhancing the stretchability of the sealing layer.

According to one aspect of the present invention there is provided a sealant layer for marine equipment, particularly ships or the like, the sealant layer comprising a sealant layer body, second and first horizontal corrugations formed on the sealant layer body, and an intersection portion at the intersection position of the second and first horizontal corrugations, the second horizontal corrugations being smaller in height than the first horizontal corrugations, and the second horizontal corrugations having a largest second horizontal dimension smaller than the first horizontal dimension of the first horizontal corrugations, the first and second horizontal directions being perpendicular and together defining an extension plane of the sealant layer body,

the intersection portion has a ridge section spanning a second horizontal corrugation, a dimension in a second horizontal direction at a mid-position of the ridge section being smaller than a dimension in a first horizontal direction at a top of the second horizontal corrugation and smaller than a dimension in the second horizontal direction at the top of the first horizontal corrugation, a height of the ridge section being greater than a height of the first horizontal corrugation.

In one embodiment, the junction portion further includes side sections located at both ends of the ridge section, respectively, both the side sections extending in the second horizontal direction so as to protrude from the first horizontal corrugation in the second horizontal direction.

In one embodiment, the height of the side section is less than the height of the first horizontal corrugation and greater than the height of the second horizontal corrugation.

In one embodiment, in a projection plane defined by a second horizontal direction, a height direction, a cross-sectional contour line of the top surface of the side section is parallel to the sealing layer body; in a cross-sectional view of the side section taken by a cross-section defined by a first horizontal direction, a height direction, a cross-sectional contour line of a top surface thereof is parallel to the sealing layer main body or formed as an arc.

In one embodiment, the side sections have a uniform dimension in a first horizontal direction and a gradually increasing dimension in a second horizontal direction in a top-to-bottom direction.

In one embodiment, the side sections have a dimension in the first horizontal direction that is greater than or equal to a dimension in the second horizontal direction at a mid-position of the ridge section.

In one embodiment, the side wall at the middle of the ridge section is perpendicular to the seal layer body; the top wall at the middle of the ridge section has a substantially semicircular cross-sectional profile in a cross-section defined by the height direction and the first horizontal direction.

In one embodiment, the side wall at the middle of the ridge section smoothly transitions to the end of the side section in the second horizontal direction.

In one embodiment, the height of the side sections is equal to or greater than the distance of the tops of the ridge sections from the tops of the second horizontal corrugations.

In one embodiment, the first and second horizontal corrugations each comprise a pair of planar side walls and a rounded top connected at the top of the pair of planar side walls, the first and second horizontal corrugations being formed in respective end views as a triangle-like shape with rounded corners at the top.

In one embodiment, the ridge section and the rounded top of the second horizontal corrugation have the same or similar radius of curvature in a projection plane defined by the height direction, the first horizontal direction.

In one embodiment, the intersection portion further comprises four drawn sections extending from the ridge section to the seal layer body, each of the drawn sections extending in a direction intersecting the second horizontal direction, the first horizontal direction, and the height direction.

In one embodiment, the projection profile of each of the drawing segments in a projection plane parallel to the direction of extension thereof is substantially triangular.

In one embodiment, the thickness at the intermediate position of the ridge section is 1/3-1/2 of the maximum width of the drawn section.

In one embodiment, the pair of second horizontal end surfaces of the intersection portion are recessed with respect to each other and the pair of first horizontal end surfaces of the intersection portion are recessed with respect to each other.

According to another aspect of the invention there is provided a storage device for containing liquefied natural gas, the inner side wall of the storage device being a sealing layer according to any one of the above aspects, the storage device being a marine equipped liquefied gas storage device, or a land-based cylindrical storage device.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the invention, and that the scope of the invention is not limited in any way by the drawings, and that the various components are not drawn to scale.

FIG. 1 is a schematic perspective view of a sealing layer according to some preferred embodiments of the present invention;

FIG. 2 is a projection of the seal layer of FIG. 1 in a projection plane defined by a first horizontal direction, a height direction;

FIG. 3 is a projection of the seal layer of FIG. 1 in a projection plane defined by a second horizontal direction, the height direction;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a cross-sectional view taken along line B-B in FIG. 1;

FIG. 6 is a top view of the sealing layer shown in FIG. 1;

FIG. 7 is a seal layer according to another preferred embodiment of the present invention;

FIG. 8 is a projection of the seal layer of FIG. 7 in a projection plane defined by a first horizontal direction, a height direction;

FIG. 9 is a projection of the seal layer of FIG. 7 in a projection plane defined by a second horizontal direction, the height direction;

FIG. 10 is a top view of the sealing layer of FIG. 7;

FIG. 11 is a partial top view of the bottom wall of some preferred embodiments of the storage device;

FIG. 12 is a substantially complete top view of the bottom wall seal of FIG. 11;

fig. 13 is a schematic perspective view of another wall of a memory device of some preferred embodiments.

Reference numerals:

100 seal layer

10. 10' seal layer body

20. 20' second horizontal corrugation

30. 30' first horizontal corrugation

40. 40' junction

41. 41' ridge section

412 top wall in the middle of the ridge section

42 side sections

Top surface of 421 side section

4211 side segment top surface contour lines

422 projection portion

Side wall of 43 ridge section

42' draw section

43', 44' end faces

400. 510 base layer

4110 base unit board

410 base layer annular section

420 base layer center section

310 center section

3110 center sealing plate

320 annular section

3210 annular segment seal plate

520 rectangular wall sealing plate

340. 5210 first sealing connection

5220 second sealing connection

420a first annular section

420b second annular section

420c third annular section

350. 5110 gap

360 another part radial corrugation

380 a part of radial corrugation

370 end caps.

Detailed Description

Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present invention, and other ways of implementing the invention will occur to those skilled in the art on the basis of the preferred embodiment, and are intended to fall within the scope of the invention as well.

The present invention provides a sealing layer and a storage device for liquefied gas having the sealing layer, which is a storage device for transportation equipment, particularly marine equipment such as ships, for example, a storage device for storing LNG for ships. The storage device may also be applied to land based equipment, for example, large storage tanks for land based LNG. Fig. 1 to 10 show schematic views of sealing layers according to preferred embodiments of the present invention.

It should be noted that, first, the directional terms, positional terms relating to the sealing layer of the present invention can be understood with reference to the positions, directions, etc. of the respective components shown in fig. 1 to 10. For example, the terms "top side", "upward", "bottom side", "downward", etc. of the various components of the processing apparatus may be explained with reference to the placement orientation of the sealing layers shown in fig. 1-5, 7-9; the "first horizontal direction" and the "second horizontal direction" are two directions perpendicular to each other, wherein the first horizontal direction is indicated by D2, the second horizontal direction is indicated by D1, and the first horizontal direction D2 and the second horizontal direction D1 together define an extension plane of the seal layer body 10 of the seal layer. The height direction D3 is a direction perpendicular to the sealing layer main body 10.

Referring first to fig. 1, the sealing layer 100 includes a sealing layer body 10 in the form of a flat plate, first and second horizontal corrugations 30 and 20 formed on the sealing layer body 10, and a protruding intersection portion 40 where the second and first horizontal corrugations 20 and 30 meet. Wherein the second horizontal corrugation 20 of the sealing layer 100 refers to the corrugation extending in the second horizontal direction D1, and the first horizontal corrugation 30 refers to the corrugation extending in the first horizontal direction D2. In the embodiment shown in fig. 1, the dimension in the second horizontal direction of the first horizontal corrugation 30 tapers in the direction from the bottom side to the top side, and the dimension in the first horizontal direction of the second horizontal corrugation 20 tapers in the direction from the bottom side to the top side. And, the height of the second horizontal corrugation 20 is smaller than the height of the first horizontal corrugation 30, and the largest first horizontal dimension of the second horizontal corrugation 20 is smaller than the largest second horizontal dimension of the first horizontal corrugation 30. In other words, the first horizontal corrugations are large corrugations and the second horizontal corrugations are small corrugations. The height of the second horizontal corrugation 20, the first horizontal corrugation 30 refers to the distance between the topmost end of the corrugation and the seal layer main body 10 in the height direction D3.

In the present embodiment, the first horizontal corrugation 30 and the second horizontal corrugation 20 are circular arc corrugations, for example, in the projection plane shown in fig. 2 and the projection plane shown in fig. 3, the projection profiles of the first horizontal corrugation 30 and the second horizontal corrugation 20 are circular arcs, the tips of the respective circular arcs are circular arcs without edges, and the sides of the circular arcs are walls with radians. In other embodiments, not shown, the first horizontal corrugation 30 and/or the second horizontal corrugation 20 may be formed as triangular corrugations, for example in their respective cross-sections (which are perpendicular to the direction of extension of the corrugation), the cross-sectional profile of which is formed as a substantially triangle.

In the present embodiment, the intersection portion 40 includes ridge sections 41 that span the second horizontal corrugation 20, and side sections 42 that are located at both ends of the ridge sections 41, respectively. The ridge sections 41 converge symmetrically toward the middle in the second horizontal corrugation extending direction. The ridge section 41 generally constitutes a ridge extending in the first horizontal direction D2 and has a narrower thickness. Specifically, referring to fig. 6, it can be seen that the dimensions D3 in the second horizontal direction D1 at the intermediate position of the ridge section 41 are both smaller than the dimension D2 in the largest first horizontal direction of the second horizontal corrugation 20 and smaller than the dimension D1 in the largest second horizontal direction of the first horizontal corrugation 30. In addition, the height of the ridge section 41 is larger than the height of the first horizontal corrugation 30, and the height of the ridge section 41 referred to in the present invention refers to the dimension of the topmost end of the ridge section 41 from the seal layer main body 10 in the height direction D3.

The side sections 42 have a different configuration than the ridge sections 41. As can be clearly seen from fig. 1, 3 and 6, the two side sections 42 extend in the second horizontal direction D1 so as to protrude in the second horizontal direction D1 from the first horizontal corrugation 30, in particular with protruding portions 422 protruding from the first horizontal corrugation 30. Preferably, referring to fig. 3 and 5, the dimensions in the first horizontal direction D2 of the side section 42 are uniform and the dimensions in the second horizontal direction D1 of the side section 42 are gradually increased in the top-to-bottom direction. It will be appreciated that the side sections 42 are formed generally as a plate-like structure positioned between the first horizontal corrugations 30 and the ridge sections 41, the plate-like structure being of uniform thickness, the plate-like structure being generally trapezoidal in an end view (fig. 3) looking in the first horizontal direction D2 and generally rectangular in a bar-like shape in an end view (fig. 2) looking in the second horizontal direction D1.

Preferably, the height of the side sections 42 is less than the height of the first horizontal corrugation 30 and greater than the height of the second horizontal corrugation 20, such that the top surface 421 of the side sections 42 is a concave structure with respect to the top surface of the first horizontal corrugation 30 and the top surface of the ridge section 41. And since the side sections 42 are entirely extended in the second horizontal direction D1, the top surfaces 421 of the side sections 42 are formed as ravines extending between the first horizontal corrugations 30 and the ridge sections 41 and in the second horizontal direction D1. More preferably, the top surface of the side section 42 (which may also be understood as the bottom surface of the gully) has a contour line 4211 parallel to the sealing layer body 10 in a cross-sectional view (fig. 4) or projection plane (fig. 2) defined by the second horizontal direction D1 and the height direction D3. Preferably, in a sectional view of the side section 42 taken by a section defined by the first horizontal direction D2, the height direction D3, the sectional profile line of the top surface is parallel to the sealing layer main body 10 or formed as an arc.

The thickness of the side sections 42 may be equal to or slightly greater than the thickness of the ridge section 41. Specifically, the dimension of the side section 42 in the first horizontal direction D2 (i.e., the dimension of the side section 42 in the direction D1 in fig. 2) is greater than or equal to the dimension in the second horizontal direction D1 at the intermediate position of the ridge section 41 (i.e., D shown in fig. 3 or D3 shown in fig. 6). It should be noted that the side section 42 forms a substantially plate-like structure, and the dimension of the side section 42 in the first horizontal direction D2 refers to the thickness of the plate. Such an arrangement may be understood as having a relatively sharp corrugation deformation at both the ridge section 41 and the side sections 42, and providing a relatively good tension and resiliency at both the ridge section 41 and the side sections 42.

In some embodiments, the side wall 43 at the middle of the ridge section 41 is substantially perpendicular to the seal layer body 10. As shown in the cross section shown in fig. 5, the cross-sectional profile of the side wall 43 at the middle of the ridge section 41 is substantially a straight line segment parallel to the D3 direction (i.e., perpendicular to the seal layer main body 10). Of course, as can be seen in fig. 1, the side walls 43 are not planar, and the pair of side walls 43 of the ridge section 41 have an arc which is concave relative to each other (referring to a recess in a plane parallel to the seal layer body 10). With continued reference to fig. 5, the side wall 43 at the middle of the ridge section 41 smoothly transitions to the end of the side section 42 in the second horizontal direction, as well as a smooth transition connection between the top wall 412 and the side wall 43 at the middle of the ridge section 41. As can be seen in fig. 5, the junction of the straight line segment and the other portion of the cross-sectional profile of the side wall 43 is a rounded junction. With continued reference to fig. 5, the cross-sectional profile of the top wall 412 at the middle of the ridge section 41 in the cross-section defined by the height direction D3 and the first horizontal direction D2 is a substantially semicircle.

Preferably, the intersection part has a smooth contour configuration at part locations in addition to the sharp deformation. For example, the side wall 43 at the middle of the ridge section 41 smoothly transitions to the end of the side section in the second horizontal direction, and a pair of transition sections at both ends of one side wall 43 and the side wall 43 together constitute a smoothly curved surface.

In the present embodiment, each of the first and second horizontal corrugations 30, 20 includes a pair of planar side walls and a circular arc-shaped top connected to the tops of the pair of planar side walls, and the first and second horizontal corrugations 30, 20 are formed in respective end views as a triangle-like shape having rounded corners at the tops. It should be noted that the reference to "triangle-like" is not intended to represent an unclear concept, but rather refers to a figure having rounded corners and other features that are consistent with triangles.

Preferably, in the projection plane (e.g., fig. 2) defined by the height direction D3 and the first horizontal direction D2, the ridge section 41 and the circular arc-shaped tip of the second horizontal corrugation 20 have the same or similar radius of curvature; further, the height of the side sections 42 is equal to or greater than the distance of the top of the ridge section 41 from the top of the second horizontal corrugation 20. The arrangement is such that the side sections 42, the ridge sections 41 and the second horizontal corrugations 20 together form an arc of uniform thickness throughout, the top surfaces of the ridge sections 41 and the top surfaces of the side sections 42 forming the top side boundary of the arc, and the second horizontal corrugations 20 forming the bottom side boundary of the arc.

Fig. 7-10 illustrate another preferred sealing layer of the present invention. Wherein the sealing layer 100' is similar in structure to the sealing layer of the previous embodiment, and also includes the first horizontal corrugation 20', the second horizontal corrugation 30', and the intersection portion 40', the intersection portion 40' forms a structure that is gathered toward the middle. The intersection portion 40' further includes four drawing sections 42' extending from the ridge section 41' to the seal layer main body 10', each of the drawing sections 42' extending direction intersecting with the second horizontal direction, the first horizontal direction, and the height direction.

Wherein the projected contour of each of said draw segments 42' in a projected plane parallel to the direction of extension thereof is substantially triangular, as shown in fig. 1. The thickness W1 at the intermediate position of the ridge section 41' is 1/3 to 1/2 of the maximum width W2 of the drawing section. The pair of second horizontal end surfaces 44 'of the intersection portion 40' are recessed relative to each other, and the pair of first horizontal end surfaces 43 'of the intersection portion 40' are recessed relative to each other.

The sealing layer provided by the invention has relatively sharp material deformation at the central position, so that the shrinkage capacity, elasticity and tension of the sealing layer are relatively good. And the intersection portion protrudes upward from each corrugation at the center position and protrudes from the first horizontal corrugation in the second horizontal direction at the side sections, such arrangement further provides a larger amount of deformability, further enhancing the stretchability of the sealing layer.

The sealing layer shown in fig. 1 to 10 may be used as a sealing layer of a memory device, the structure of which is shown in fig. 11 to 13. References herein to directional terms "inside", "inwardly" and "inwardly" in relation to a storage device may be understood as referring to the side of the wall of the storage device containing liquefied gas and the direction toward the side containing liquefied gas; "outside", "outward" are the sides of the walls facing the outside and the direction toward the outside; "circumferential direction" and "radial direction" refer to the circumferential direction and the radial direction for a circle circumscribed by a circular or nearly circular regular polygon (including a shape similar to a regular polygon) formed by the bottom wall and the bottom wall seal layer. The directional terms used when describing the sealing layer alone, and when describing the storage device when the sealing layer is mounted to the storage device, are not necessarily identical.

Referring first to fig. 11 and 12, the base layer 400 and the sealing layer covering the inside of the base layer 400 constitute at least a part of the wall of the memory device, and the sealing layer is made of the sealing layer according to the above-described embodiments.

The wall includes a central section and an annular section, and the sealing layer and the base layer of the wall each have an annular section and a central section, respectively. Specifically, the sealing layer includes a central section 310 and at least one annular section 320, the at least one annular section 320 surrounding the central section 310. Each ring segment 320 includes a plurality of ring segment seal plates 3210 obtained by cutting out the seal layer. Each annular segment has a gap 350 between adjacent cells for mounting a first sealing connection, for example, disposed between and securing circumferentially adjacent annular segment seal plates 3210 to the base layer 400. The central section 310 is formed by a fan-shaped sealing plate 3110. The base layer also has a base layer center section 420 and a base layer annular section 410, the base layer annular section 410 being made up of base layer cell plates 4110.

Further, the annular sections 320 are at least two, the at least two annular sections 320 are circumferentially arranged in sequence, and the sealing layer further includes a second sealing connector 340, the second sealing connector 340 being disposed between adjacent annular sections 320 and securing the adjacent annular sections to the base layer 400. Fig. 12 shows three annular sections—a first annular section 420a, a second annular section 420b and a third annular section 420c. In other embodiments not shown, there may be fewer or more annular sections.

The first and second horizontal corrugations of each seal plate 3210 of the annular section constitute radial and circumferential corrugations of the annular section 320, respectively, wherein a portion of the radial inner ends of the radial corrugations 380 extend to the central section 310 and a portion of the radial inner ends of the radial corrugations 360 are located centrally of the annular section 320 and away from the central section 310, such an arrangement being able to avoid that at radially outer positions of the annular section, the circumferential length (S1 and S2, for example, as shown in the figures) between adjacent radial corrugations is excessive, resulting in a lack of stability and ductility therein, while a further radial corrugation is added between such adjacent radial corrugations, such that the maximum circumferential distance between circumferentially adjacent radial corrugations can be within a predetermined range. For example, if the distance between the radially inner ends of an adjacent pair of radial corrugations in a portion of radial corrugations 380 is X, the maximum circumferential distance between circumferentially adjacent radial corrugations in the annular section may be between 1.5X-5X. Preferably, a sealing end cap 370 is mounted at the radially inner end of each radial corrugation.

Fig. 13 shows a rectangular wall. The sealing layers include sealing layers 520 arranged in an array, and adjacent sealing layers along a first horizontal direction are connected and sealed by a first sealing connector 5210, and adjacent sealing layers along a second horizontal direction are connected and sealed by a second sealing connector 5220. The base layer 510 also includes base layer plates arranged in an array, gaps 5110 are present between adjacent base layer plates, and the sealing layer has corrugations extending in the same direction as each gap, and the corrugations cover the gaps.

As can be seen from the above embodiments, the sealing layer of the storage device of the present invention may be made of standard components with regular shapes, without requiring sections with special shapes, and the standard components may be simply cut from rectangular plates, so that the processing is simple and the materials are saved; the sealing layer has good flatness, has small damage degree to the heat insulation layer structure, and can reduce the influence of the sealing layer on the strength of the heat insulation box; the sealing layer structure determines that the sealing layer can be made thinner, so that the overall heat conduction coefficient of the heat storage container can be reduced, and the heat preservation effect is improved. Furthermore, sealing connecting pieces serving as universal pieces can be adopted between adjacent standard pieces, and certain sealing connecting pieces have certain heat elasticity and can provide certain cold shrinkage deformation for sealing layers. In addition, the sealing connecting piece does not need to carry out additional processing operations such as edging and the like on the sealing layer unit plates, so that the flatness of the sealing layer can be improved, and the sealing effect is ensured. The bottom wall sealing layer has no convex part, and two layers of sealing layers and heat insulation layers are paved, so that the back surface of the heat insulation layer on the upper layer does not need to be grooved, and the structural strength of the heat insulation layer is improved. The storage device of the invention is a marine equipped liquefied gas storage device or a land cryogenic liquid plant.

It is not intended that the invention be limited to the single disclosed embodiment. Other embodiments can be developed by those of ordinary skill in the art.

Claims

1. A seal for a liquefied gas storage tank of a transportation device, in particular marine equipment such as a ship, the seal (100) comprising a seal body (10), a second horizontal corrugation (20) and a first horizontal corrugation (30) formed on the seal body (10), and an intersection portion (40) at an intersection position of the second horizontal corrugation and the first horizontal corrugation, the second horizontal corrugation (20) having a height which is smaller than a height of the first horizontal corrugation (30) and a largest first horizontal dimension of the second horizontal corrugation (20) being smaller than a largest second horizontal dimension of the first horizontal corrugation (30), the first and second horizontal directions being perpendicular and together defining an extension plane of the seal body,

characterized in that the intersection portion (40) has a ridge section (41) spanning a second horizontal corrugation, the ridge section (41) converging symmetrically towards the middle along a second horizontal corrugation extension direction, wherein a dimension (D3) of the ridge section in the second horizontal direction (D1) at a middle position is smaller than a dimension (D2) of the second horizontal corrugation (20) in the largest first horizontal direction and smaller than a dimension (D1) of the first horizontal corrugation (30) in the largest second horizontal direction, and a height of the ridge section (41) is larger than a height of the first horizontal corrugation.

2. Sealing layer according to claim 1, wherein the intersection portion (40) further comprises side sections (42) located on both sides of the ridge section (41), respectively, both of which extend in a second horizontal direction (D1) so as to protrude in the second horizontal direction from the first horizontal corrugation (30).

3. Sealing layer according to claim 2, characterized in that the height of the side sections (42) is smaller than the height of the first horizontal corrugation (30) and larger than the height of the second horizontal corrugation (20).

4. A sealing layer according to claim 2 or 3, characterized in that in a projection plane defined by the second horizontal direction (D1), the height direction, the cross-sectional contour line (4211) of the top surface (421) of the side section (42) is parallel to the sealing layer body (10).

5. A sealing layer according to claim 2 or 3, characterized in that the dimensions in the first horizontal direction (D2) of the side sections (42) are uniform and the dimensions in the second horizontal direction (D1) of the side sections are gradually increasing in the top-to-bottom direction.

6. Sealing layer according to claim 5, characterized in that the dimension of the side sections (42) in the first horizontal direction (D2) is smaller than or equal to the dimension (D3) in the second horizontal direction at the intermediate position of the ridge section (41).

7. A sealing layer according to any one of claims 1-3, characterized in that a side wall (43) in the middle of the ridge section (42) is perpendicular to the sealing layer body; a cross-sectional profile (412) of the top wall at the middle of the ridge section (41) in a cross-section defined by the height direction (D3) and the first horizontal direction (D2) is a substantially semicircle.

8. Sealing layer according to claim 7, characterized in that the side wall (43) at the middle of the ridge section (41) transitions smoothly to the end of the side section (42) in the second horizontal direction.

9. A sealing layer according to claim 2 or 3, characterized in that the height of the side sections (42) is equal to or greater than the distance of the tops of the ridge sections (41) from the tops of the second horizontal corrugations (20).

10. A sealing layer according to any of claims 1-3, wherein the first (30) and second (20) horizontal corrugations each comprise a pair of planar side walls and a rounded top connected at the top of the pair of planar side walls, the first and second horizontal corrugations being formed in respective end views as triangular-like shapes with rounded corners at the top.

11. Sealing layer according to claim 10, characterized in that the ridge sections (41) and the rounded tops of the second horizontal corrugations (20) have the same or similar radius of curvature in a projection plane defined by the height direction (D3), the first horizontal direction (D2).

12. A sealing layer according to claim 1, wherein the intersection portion (40 ') further comprises four draw sections (42 ') extending from the ridge section (41 ') to the sealing layer body (10 '), each draw section (42 ') extending in a direction intersecting a second horizontal direction, a first horizontal direction, a height direction.

13. Sealing layer according to claim 12, characterized in that the projection profile of each of the drawing segments (42') in a projection plane parallel to the direction of extension thereof is substantially triangular.

14. Sealing layer according to claim 12, characterized in that the thickness (W1) at the intermediate position of the ridge section (41') is 1/3-1/2 of the maximum width (W2) of the drawn section.

15. Sealing layer according to claim 12, characterized in that the pair of second horizontal end surfaces (44 ') of the intersection portion (40') are recessed with respect to each other and the pair of first horizontal end surfaces (43 ') of the intersection portion (40') are recessed with respect to each other.

16. A storage device for containing liquefied natural gas, the storage device having an inner side wall that is a containment layer according to any one of claims 1 to 15, the storage device being a marine equipped liquefied gas storage device, or a land-based cylindrical storage device.