Corrugated unit and corrugated plate of liquefied natural gas (LNG) ship liquid cargo containment system

Abstract

The invention relates to an LNG ship liquid cargo containment system corrugated unit and a corrugated plate, the LNG ship liquid cargo containment system corrugated unit comprises a bottom plane part and a corrugated protruding part which are arranged in a stacked mode, the corrugated protruding part has a certain height relative to the bottom plane part, and the height is smaller than the length of the bottom plane part; the projection of the corrugated protruding part on the bottom plane part coincides with the bottom plane part. The bottom plane part is provided with a plurality of edges, and the edges of the bottom plane part are connected with the corrugated protruding parts respectively. According to the corrugated plate, transverse and vertical low-temperature contraction deformation is absorbed at the same time through the corrugated convex structures, and internal stress generated by low-temperature contraction of the corrugated plate in a large-temperature-difference-change working scene can be reduced. The corrugated unit form is simple in structure and easy to machine, forming is easy to control in the machining and stamping process, the thinning rate is uniform and dispersed, and the yield is high.

Description

Technical Field

[0001] The present application relates to the technical field of shipbuilding, and in particular to a corrugated unit and a corrugated plate of a liquid cargo containment system of an LNG ship. Background Art

[0002] The cross-shaped continuous closed-loop corrugation of the corrugated plate of the LNG ship containment system is currently commonly used. In the working scene with large temperature differences, stress concentration is prone to occur in the non-corrugated area of ​​the welding anchor section. The corrugation arrangement is relatively concentrated, and the parent material forming and local thinning rate are difficult to control during the corrugation stamping process. Summary of the invention

[0003] (1) Technical issues to be solved

[0004] The present application provides a corrugated unit and a corrugated plate of a liquid cargo containment system of an LNG ship, which solve the problems in the above-mentioned background technology.

[0005] (2) Technical solution

[0006] In the first aspect, the present application provides a corrugated unit of an LNG ship liquid cargo containment system, comprising a stacked bottom plane portion and a corrugated protrusion portion, wherein the corrugated protrusion portion has a certain height relative to the bottom plane portion, and the height is less than the length of the bottom plane portion; the projection of the corrugated protrusion on the bottom plane portion coincides with the bottom plane portion; the bottom plane portion has a plurality of edges, and each edge of the bottom plane portion is respectively connected to the corrugated protrusion portion.

[0007] Furthermore, the corrugated raised portion has a plurality of surfaces, and each surface of the corrugated raised portion is correspondingly connected to each edge of the bottom plane portion.

[0008] Furthermore, the bottom plane portion is in a square shape, and the sides of the bottom plane portion include a first side, a second side, a third side and a fourth side.

[0009] Furthermore, the shape of the corrugated raised portion is a quadrangular pyramid, and the surfaces of the corrugated raised portion include a first surface, a second surface, a third surface and a fourth surface.

[0010] Further, the first surface is connected to the first edge, the second surface is connected to the second edge, the third surface is connected to the third edge, and the fourth surface is connected to the fourth edge.

[0011] Furthermore, the four edges of the corrugated raised portion are respectively connected to the four corner points of the bottom plane portion.

[0012] Further, the projection of the apex of the corrugated protrusion on the bottom plane portion is located at the center of the bottom plane portion.

[0013] Furthermore, the height of the corrugated raised portion is one tenth of the side length of the bottom plane portion.

[0014] In a second aspect, the present application provides a corrugated plate of a liquid cargo containment system of an LNG ship, wherein the corrugated plate is obtained by splicing a plurality of corrugated units of the liquid cargo containment system of the LNG ship.

[0015] (3) Beneficial effects

[0016] The above technical solution of the present application has the following advantages:

[0017] The corrugated unit of the LNG ship liquid cargo containment system provided in the first aspect of the present application can absorb the lateral and vertical low-temperature shrinkage deformation simultaneously through the corrugated protrusion structure, and can reduce the internal stress generated by the low-temperature shrinkage of the corrugated plate in the working scene with large temperature difference. The corrugated unit has a simple structure, is easy to process, and the forming is easy to control during processing and stamping. The thinning rate is uniformly dispersed and the yield rate is high.

[0018] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the corrugated unit of the LNG carrier liquid cargo containment system provided for this application;

[0021] Figure 2 A cross-sectional view of a corrugated unit of a liquid cargo containment system of an LNG carrier provided for this application;

[0022] Figure 3 Schematic diagram of the corrugated plate of the LNG carrier liquid cargo containment system provided for this application.

[0023] Figure numerals: 1, bottom plane portion; 11, first side; 12, second side; 13, third side; 14, fourth side; 2, corrugated protrusion portion; 21, first surface; 22, second surface; 23, third surface; 24, fourth surface. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0028] The present application provides a corrugated unit and a corrugated plate of an LNG ship liquid cargo containment system, the purpose of which is to reduce the internal stress caused by low-temperature shrinkage of the corrugated plate in a working scenario with large temperature differences. The corrugated plate is suitable for liquid cargo tanks of LNG transport ships, LNG fuel tanks of other ships, and land LNG storage tanks, etc.

[0029] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0030] The present application embodiment provides a corrugated unit of a liquid cargo containment system of an LNG ship, such as Figure 1 and Figure 2As shown, it includes a stacked bottom plane portion 1 and a corrugated protrusion portion 2, wherein the corrugated protrusion portion 2 has a certain height relative to the bottom plane portion 1, and the height is smaller than the length of the bottom plane portion 1; the projection of the corrugated protrusion portion 2 on the bottom plane portion 1 coincides with the bottom plane portion 1; the bottom plane portion 1 has multiple edges, and each edge of the bottom plane portion 1 is respectively connected to the corrugated protrusion portion 2.

[0031] In some embodiments, the corrugated raised portion 2 has a plurality of faces, and each face of the corrugated raised portion 2 is correspondingly connected to each edge of the bottom plane portion 1 .

[0032] In some embodiments, the bottom plane portion 1 is in a square shape, and the sides of the bottom plane portion 1 include a first side 11 , a second side 12 , a third side 13 and a fourth side 14 .

[0033] In some embodiments, the corrugated raised portion 2 is in the shape of a quadrangular pyramid, and the surfaces of the corrugated raised portion 2 include a first surface 21 , a second surface 22 , a third surface 23 and a fourth surface 24 .

[0034] In some embodiments, the first surface 21 is connected to the first edge 11 , the second surface 22 is connected to the second edge 12 , the third surface 23 is connected to the third edge 13 , and the fourth surface 24 is connected to the fourth edge 14 .

[0035] In some embodiments, the four edges of the corrugated protrusion 2 are respectively connected to the four corner points of the bottom plane portion 1.

[0036] In some embodiments, the projection of the apex of the corrugated protrusion 2 on the bottom plane portion 1 is located at the center of the bottom plane portion 1 .

[0037] In some embodiments, the height of the corrugated protrusion 2 is one tenth of the side length of the bottom plane portion 1 .

[0038] In application, the bottom edge of the corrugated unit is a flat square, that is, the bottom edge of the corrugated unit is connected to form a flat square, which is convenient for connection with surrounding structures or adjacent corrugated units, and is also convenient for arrangement in the overall design of the corrugated board. The corrugated unit protrusion is a quadrangular pyramid, which is arranged in the center of the square, and the four edges are connected to the four corner points of the bottom square.

[0039] The shrinkage deformation margin in both the longitudinal and transverse directions is stored in the form of a quadrangular pyramid protrusion, and the shrinkage internal stress of a single particle at low temperature is reduced compared to a flat material. The quadrangular pyramid protrusion has a symmetrical and stable structure, a single quadrangular pyramid protrusion is small in size, and has a strong bearing capacity, which can avoid the work of installing a pressure pad on the reverse side.

[0040] The bottom edge of the corrugated unit is a square, and the corrugated unit protrusion is a quadrangular pyramid. The corrugated protrusion structure can absorb both horizontal and vertical low-temperature shrinkage deformations. At the same time, the edge of the square bottom makes it easy to connect with surrounding structures or corrugated units.

[0041] The corrugated unit has a simple structure and is easy to process. The forming process is easy to control during stamping, the thinning rate is evenly dispersed, and the yield rate is high. It can be used in working scenarios that need to withstand large temperature differences, including but not limited to LNG transport ships, LNG fuel tanks, LNG land storage tanks, etc.

[0042] The corrugated unit has a simple structure, a small convex distance vertical to the plate surface, and a strong bearing capacity, and there is no need to set a pressure-bearing aluminum block on the back of the corrugation. The corrugated unit is not limited by size, and if necessary, the size of the corrugated unit can be made smaller, which can effectively disperse the low-temperature shrinkage deformation, so that the deformation borne by each corrugated unit is smaller and controlled within the elastic deformation, thereby improving the fatigue life, reducing the low-temperature shrinkage stress, effectively improving the fatigue life, and ensuring safety.

[0043] In this embodiment, the specifications of a single corrugated unit are 100mm×100mm×10mm, and the plate thickness is 1.2mm; the specifications of the entire corrugated plate are 3000mm×1000mm×10mm, and the plate thickness is 1.2mm. The specific dimensions can be adjusted according to demand.

[0044] In this embodiment, the single corrugated unit does not exist independently, but is stamped together with the entire corrugated plate on a whole mother plate, and exists in a continuous form.

[0045] The present application also provides a corrugated plate for a liquid cargo containment system of an LNG ship, such as Figure 3 As shown, the corrugated plate is obtained by splicing a plurality of the corrugated units of the LNG ship liquid cargo containment system.

[0046] The corrugated unit and corrugated plate of the LNG ship liquid cargo containment system provided in the embodiment of the present application pre-store the shrinkage deformation margin in the longitudinal and transverse directions through the form, and the shrinkage internal stress of a single particle at low temperature is reduced compared with the flat material. The corrugated unit form has a simple structure, is easy to process, and the forming is easy to control during processing and stamping. The thinning rate is uniformly dispersed and the yield rate is high.

[0047] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.

[0048] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. For the embodiments of the method, the relevant parts can refer to the partial description of the device embodiment (adopted according to the writing situation). The present application is not limited to the specific steps and structures described above and shown in the figures. In addition, for the sake of simplicity, a detailed description of known method technologies is omitted here.

[0049] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A corrugated unit for a liquid cargo containment system of an LNG ship, characterized in that: It comprises a bottom plane portion and a corrugated convex portion which are stacked, wherein the corrugated convex portion has a certain height relative to the bottom plane portion, and the height is smaller than the length of the bottom plane portion; and the projection of the corrugated convex portion on the bottom plane portion coincides with the bottom plane portion; The bottom plane portion has a plurality of edges, and each edge of the bottom plane portion is connected to the corrugated protrusion portion respectively.

2. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 1, characterized in that: The corrugated raised portion has a plurality of surfaces, and each surface of the corrugated raised portion is correspondingly connected to each edge of the bottom plane portion.

3. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 1, characterized in that: The bottom plane portion is in a square shape, and the sides of the bottom plane portion include a first side, a second side, a third side, and a fourth side.

4. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 3, characterized in that: The shape of the corrugated protrusion is a quadrangular pyramid, and the surfaces of the corrugated protrusion include a first surface, a second surface, a third surface and a fourth surface.

5. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 4, characterized in that: The first surface is connected to the first edge, the second surface is connected to the second edge, the third surface is connected to the third edge, and the fourth surface is connected to the fourth edge.

6. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 4, characterized in that: The four edges of the corrugated raised portion are respectively connected to the four corner points of the bottom plane portion.

7. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 4, characterized in that: The projection of the apex of the corrugated protrusion on the bottom plane portion is located at the center of the bottom plane portion.

8. The corrugated unit of the LNG carrier liquid cargo containment system according to claim 4, characterized in that: The height of the corrugated protrusion is one tenth of the side length of the bottom plane portion.

9. A corrugated plate for a liquid cargo containment system of an LNG ship, characterized in that: The corrugated plate is obtained by splicing a plurality of corrugated units of the LNG ship liquid cargo containment system according to any one of claims 1 to 8.

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