Polyhedral cryogenic liquid cargo tank

Abstract

This application relates to the field of liquid cargo storage and transportation technology. It provides a multi-faceted cryogenic liquid cargo storage tank, including a main shielding layer, a main insulation layer, a secondary shielding layer, and a secondary insulation layer. The main shielding layer is located at the innermost layer of the tank and is in contact with the liquid cargo. The secondary shielding layer is located between the main insulation layer and the secondary insulation layer. The main shielding layer includes a first planar corrugated plate and a first angled structure connecting the first planar corrugated plates on two adjacent planes. The secondary shielding layer includes a second planar corrugated plate and a second angled structure connecting the second planar corrugated plates on two adjacent planes. The second planar corrugated plate has inwardly protruding corrugated sections facing the inside of the tank and outwardly protruding corrugated sections facing the outside of the tank. The planar corrugated plate has corrugations in a first direction and a second direction that are perpendicular to each other. The corrugation spacing of the first planar corrugated plate is smaller than that of the second planar corrugated plate. The multi-faceted liquid cargo storage tank provided by this application has good sealing and insulation properties, enabling effective storage of the liquid cargo inside the tank.

Description

Technical Field

[0001] This application relates to the field of liquid cargo storage and transportation, and in particular to a polyhedral cryogenic liquid cargo storage tank. Background Technology

[0002] The storage and transportation of cryogenic liquid cargoes (such as liquefied natural gas, liquid hydrogen, and liquid oxygen) typically employs storage tanks with high thermal insulation and tightness. Polyhedral (such as prism, cube, and rhombus) storage tanks are widely used due to their high space utilization and ease of placement on ships or land.

[0003] Existing multi-faceted cryogenic liquid storage tanks typically employ a structure combining double-layer shielding (primary and secondary shielding) with double-layer insulation (primary and secondary insulation). The shielding layers (primary and secondary shielding layers) consist of planar corrugated plates and angled structures connecting adjacent planar corrugated plates, serving to withstand the thermal and structural stresses generated by the cryogenic liquid and prevent liquid leakage. The insulation layers maintain the cryogenic environment and reduce heat intrusion.

[0004] However, existing technologies still have shortcomings in the following aspects:

[0005] Poor deformation coordination of the secondary shielding layer: As the second layer of leakage prevention barrier, the corrugated plate of the secondary shielding layer is usually designed with corrugations in a single direction (all convex inward or all convex outward). When subjected to the impact of cryogenic liquid leakage from the primary shielding layer or deformation of the main tank structure, the secondary shielding layer cannot effectively absorb multi-dimensional deformation, and is prone to local overstretching or compression, thereby reducing its barrier reliability.

[0006] Inappropriate corrugation matching between primary and secondary shielding layers: In existing technologies, the corrugation spacing between the primary and secondary shielding layers is usually the same or arbitrarily set, without considering the synergistic relationship between the two in deformation response. This may cause deformation to be concentrated on a single shielding layer, accelerating its fatigue damage, or subject the insulation layer to unnecessary shear or compressive stress, affecting the overall insulation performance and service life. Summary of the Invention

[0007] Therefore, the purpose of this invention is to provide a multi-faceted cryogenic liquid cargo storage tank to solve at least one of the following problems in the prior art: the secondary shielding layer has a single deformation capability and cannot adapt to complex multi-dimensional deformations, resulting in insufficient reliability as a second barrier; the deformation coordination between the primary and secondary shielding layers is poor, causing excessive local stress or damage to the insulation layer.

[0008] To solve the above-mentioned technical problems, the present invention provides a multi-faceted cryogenic liquid cargo storage tank, including a main shielding layer, a main insulation layer, a secondary shielding layer, and a secondary insulation layer; the main shielding layer is disposed in the innermost layer of the storage tank and is in direct contact with the liquid cargo; the secondary shielding layer is disposed between the main insulation layer and the secondary insulation layer.

[0009] The main shielding layer includes a first planar corrugated plate and a first angle structure connecting the first planar corrugated plates on two adjacent planes; the first angle structure includes a first angle plate and a first corrugated angle connector arranged on the first angle plate;

[0010] The secondary shielding layer includes a second planar corrugated plate and a second angle structure connecting the second planar corrugated plates on two adjacent planes; the second angle structure includes a second angle plate and a second corrugated angle connector arranged on the second angle plate;

[0011] The second planar corrugated plate has an inner corrugated section protruding towards the inside of the storage tank, an outer corrugated section protruding towards the outside of the storage tank, and a torsion section, which connects the inner corrugated section and the outer corrugated section together on the corrugation.

[0012] The corrugation spacing between two adjacent corrugations in the same direction of the first planar corrugated plate is L1, and the corrugation spacing between two adjacent corrugations in the same direction of the second planar corrugated plate is L2.

[0013] L1 is less than or equal to L2. In terms of effectiveness, because the internal temperature of the storage tank is lower than the external temperature, the shrinkage of the primary shielding layer is greater than that of the secondary shielding layer. The corrugation spacing of the primary shielding layer is smaller than that of the secondary shielding layer, which is beneficial for overall stability and safety. Conversely, because the secondary shielding layer needs to provide less corrugation deformation than the primary shielding layer, the number of corrugations can be reduced and the corrugation spacing can be increased for the same area, which is more conducive to system insulation.

[0014] Preferably, L1 is less than L2.

[0015] Preferably, L1 equals L2.

[0016] Preferably, the projection of the corrugations on the second planar corrugated plate onto the first planar corrugated plate coincides with the corrugated portion on the first planar corrugated plate.

[0017] Preferably, the corrugations on the second planar corrugated plate are projected onto the first planar corrugated plate in a staggered manner from the corrugations on the first planar corrugated plate.

[0018] Preferably, L1 is 350-650 mm.

[0019] Preferably, L2 is 400-700 mm.

[0020] Preferably, the main shielding layer further includes a first bend member, and the secondary shielding layer further includes a second bend member; the first bend member connects the corrugations of the first planar corrugated plate and the first corrugated angle connector; the second bend member connects the corrugations of the second planar corrugated plate and the second corrugated angle connector.

[0021] Preferably, the main shielding layer further includes a first corrugated blocking member, and the secondary shielding layer further includes a second corrugated blocking member; the first corrugated blocking member is disposed at a position near the first angle structure on the first planar corrugated plate, for cutting off the corrugations on the first planar corrugated plate that do not need to be connected with the first corrugated angle connector; the second corrugated blocking member is disposed at a position near the second angle structure on the second planar corrugated plate, for cutting off the corrugations on the second planar corrugated plate that do not need to be connected with the second corrugated angle connector.

[0022] Preferably, the first bend is disposed on the first positive surface, which is the surface with the most adjacent surfaces in the main shielding layer; the second bend is disposed on the second positive surface, which is the surface with the most adjacent surfaces in the secondary shielding layer; when the corrugations on the first positive surface are connected to the first angled structure through the first bend, the corrugations extend past the intersection of the first guidelines before connecting to the first bend, or the corrugations do not extend to the intersection of the first guidelines before connecting to the first bend; when the corrugations on the second positive surface are connected to the second angled structure through the second bend, the corrugations extend past the intersection of the second guidelines before connecting to the second bend, or the corrugations do not extend to the intersection of the second guidelines before connecting to the second bend.

[0023] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0024] 1. Significantly Enhanced Multidimensional Deformation Adaptability and Barrier Reliability of the Secondary Shielding Layer: The second planar corrugated plate of the secondary shielding layer simultaneously features inward-facing corrugated sections protruding towards the inside of the tank, outward-facing corrugated sections protruding towards the outside, and a torsion section connecting the two. This unique "inner-outer-torsion" three-dimensional corrugated design enables the secondary shielding layer to possess excellent flexibility and deformation-following ability in multiple directions (in-plane tension / compression, out-of-plane bending, torsion, etc.). Even if the primary shielding layer leaks, the secondary shielding layer can readily adapt to the complex deformation of the tank structure in extremely low-temperature environments, effectively maintaining its integrity and sealing as the second leak-proof barrier.

[0025] 2. Optimizing the deformation synergy of the primary and secondary shielding layers to extend overall lifespan: By setting the corrugation spacing (L1) of the primary shielding layer to be less than or equal to the corrugation spacing (L2) of the secondary shielding layer, the primary shielding layer exhibits higher corrugation density and superior local compliance compared to the secondary shielding layer. Under the same load (thermal stress, liquid pressure, etc.), the primary shielding layer preferentially undergoes microscopic deformation and absorbs most of the strain energy, thereby significantly reducing the stress level transmitted to the secondary shielding layer and the insulation layer. This synergistic mechanism of "active deformation of the primary shielding layer and passive protection of the secondary shielding layer" not only delays the fatigue damage process of the primary shielding layer but also effectively protects the structural stability of the secondary shielding layer and the insulation layer, thus significantly improving the safety and reliability of the entire tank system during its long-term service life.

[0026] 3. Improve the integrity and thermal insulation performance of the insulation layer: Since the primary and secondary shielding layers can adapt to deformation in a more coordinated manner, the interfacial shear and compressive stress on the primary insulation layer and the structure outside the secondary insulation layer located between them is effectively relieved, reducing the risk of the insulation material falling off, cracking or degrading due to stress, thus maintaining excellent low-temperature thermal insulation effect for a long time. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the polyhedral cryogenic liquid cargo storage tank according to an embodiment of this application;

[0028] Figure 2 This is a structural diagram of the corner area of ​​a polyhedral cryogenic liquid cargo storage tank according to an embodiment of this application;

[0029] Figure 3 This is a structural diagram of the first planar corrugated plate of the main shielding layer according to an embodiment of this application;

[0030] Figure 4 This is a structural diagram of the second planar corrugated plate of the secondary shielding layer according to an embodiment of this application;

[0031] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0032] Figure 6 This is a structural diagram of the first or second bend component according to an embodiment of this application;

[0033] Figure 7 This is a structural diagram of the first or second corrugated blocking component according to an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of a corrugated connection elbow method in the first positive surface corrugated arrangement of this application embodiment; Figure 9 This is a schematic diagram of another corrugated connection elbow method in the first positive surface corrugated arrangement of this application embodiment; Explanation of reference numerals in the attached figures: 00-sided cryogenic liquid cargo storage tank; 10 main shielding layers; 20 main insulation layers; 30 secondary shielding layers; 40 secondary insulation layers; 11 First planar corrugated plate; 12 First angled structure; 13 First bend;

[0035] 121 First angle plate, 122 First corrugated angle connector;

[0036] 31 Second planar corrugated plate; 32 Second angled structure;

[0037] 321 Second angle plate, 322 Second corrugated angle connector;

[0038] 311 Inner corrugated section, 313 Outer corrugated section, 312 Torsion section;

[0039] L1 The corrugation spacing between two adjacent corrugations in the same direction of the first planar corrugated plate;

[0040] L2 Second Planar Corrugated Plate: Corrugation spacing between two adjacent corrugations in the same direction;

[0041] 15. First positive plane;

[0042] 19. Intersection of the first directrix. Detailed Implementation

[0043] This application provides a polyhedral cryogenic liquid cargo storage tank, which has significant safety and reliability.

[0044] To clearly describe the technical features of this application, specific embodiments and accompanying drawings are provided below for detailed explanation. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components, processing techniques, and processes are omitted in this application to avoid unnecessarily limiting the scope of the application.

[0045] like Figure 1 As shown, a multi-faceted cryogenic liquid cargo storage tank 00 includes a main shielding layer 10, a main insulation layer 20, a secondary shielding layer 30, and a secondary insulation layer 40. The main shielding layer 10 is disposed in the innermost layer of the storage tank and is in direct contact with the liquid cargo. The secondary shielding layer 30 is disposed between the main insulation layer 20 and the secondary insulation layer 40.

[0046] like Figures 1-2 As shown, the main shielding layer 10 includes a first planar corrugated plate 11 and a first angle structure 12 connecting the first planar corrugated plates 11 on two adjacent planes; the first angle structure 12 includes a first angle plate 121 and a first corrugated angle connector 122 arranged on the first angle plate 121; the secondary shielding layer 30 includes a second planar corrugated plate 31 and a second angle structure 32 connecting the second planar corrugated plates 31 on two adjacent planes; the second angle structure 32 includes a second angle plate 321 and a second corrugated angle connector 322 arranged on the second angle plate 321; like Figures 4-5 As shown, the second planar corrugated plate 31 has an inner corrugated section 311 protruding towards the inside of the tank, an outer corrugated section 313 protruding towards the outside of the tank, and a twisting part 312. The twisting part 312 connects the inner corrugated section 311 and the outer corrugated section 313 together on the corrugated path. like Figures 3-4 As shown, the corrugation spacing between two adjacent corrugations in the same direction of the first planar corrugated plate 11 is L1, and the corrugation spacing between two adjacent corrugations in the same direction of the second planar corrugated plate 31 is L2.

[0047] In the preferred embodiment, L1 is less than L2.

[0048] In another preferred embodiment, L1 equals L2.

[0049] like Figure 6 The diagram shown is a structural diagram of the first or second bend member of a preferred embodiment; the direction of the corrugations is adjusted by the bend member structure so that the corrugations on the planar corrugated plate are connected to the corrugated corner connector.

[0050] like Figure 7 The diagram shown is a structural diagram of the first or second corrugated blocking member of a preferred embodiment. When the corrugations on the planar corrugated plate extend to the edge of the plane, some corrugations do not need to be connected to the corrugated corner connector, so the corrugated blocking member can be connected to seal the corrugations.

[0051] like Figures 8-9 This is a schematic diagram of two corrugated connection methods in the first positive surface corrugated arrangement, as shown below. Figure 8 As shown, the intersection point of the corrugated guide lines on the first positive surface 15 is the first guide line intersection point 19. The corrugations are connected to the corner area by the first bend before extending to 19; as Figure 9 In another preferred embodiment, the intersection point of the corrugated guide lines on the first positive surface 15 is the first guide line intersection point 19, and the corrugations are connected to the corner area through the first bend after extending to 19.

[0052] It should be noted that the terminology used in the embodiment section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between associated obstacles, indicating that three relationships can exist, for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. In addition, in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more, "at least one" or "one or more" means one, two or more.

[0053] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0054] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0055] The above description is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

1. A polyhedral cryogenic liquid cargo tank (00) characterized by, It includes a main shielding layer (10), a main insulation layer (20), a secondary shielding layer (30), and a secondary insulation layer (40); The main shielding layer (10) is located in the innermost layer of the storage tank and is in direct contact with the liquid cargo; the secondary shielding layer (30) is located between the main insulation layer (20) and the secondary insulation layer (40); The main shielding layer (10) includes a first planar corrugated plate (11) and a first angle structure (12) connecting the first planar corrugated plates (11) on two adjacent planes. The first angle structure (12) includes a first angle plate (121) and a first corrugated angle connector (122) arranged on the first angle plate (121). The secondary shielding layer (30) includes a second planar corrugated plate (31) and a second angle structure (32) connecting the second planar corrugated plates (31) on two adjacent planes. The second angle structure (32) includes a second angle plate (321) and a second corrugated angle connector (322) arranged on the second angle plate (321); The second planar corrugated plate (31) is provided with an inner corrugated section (311) protruding towards the inside of the storage tank, an outer corrugated section (313) protruding towards the outside of the storage tank, and a torsion part (312). The torsion part (312) connects the inner corrugated section (311) and the outer corrugated section (313) together on the corrugation. The corrugation spacing between two adjacent corrugations in the same direction of the first planar corrugated plate (11) is L1, and the corrugation spacing between two adjacent corrugations in the same direction of the second planar corrugated plate (31) is L2. L1 is less than or equal to L2.

2. The polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, L1 is less than L2.

3. The polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, L1 is equal to L2.

4. The polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The projection of the corrugations on the second planar corrugated plate (31) onto the first planar corrugated plate (11) coincides with the corrugated portion on the first planar corrugated plate (11).

5. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The projection of the corrugations on the second planar corrugated plate (31) onto the first planar corrugated plate (11) is misaligned with the corrugations on the first planar corrugated plate (11).

6. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The L1 is 350-650 mm.

7. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The L2 is 400-700 mm.

8. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The main shielding layer (10) further includes a first bend, and the secondary shielding layer (30) further includes a second bend; The first bend connects the corrugations of the first planar corrugated plate (11) and the first corrugated angle connector (122). The second bend connects the corrugations of the second planar corrugated plate (31) and the second corrugated angle connector (322).

9. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 1, characterized in that, The main shielding layer (10) further includes a first corrugated blocking element, and the secondary shielding layer (30) further includes a second corrugated blocking element; The first corrugated blocking member is disposed on the first planar corrugated plate (11) near the first angle structure (12) to cut off the corrugations on the first planar corrugated plate (11) that do not need to be connected with the first corrugated angle connector (122); The second corrugated blocking member is disposed on the second planar corrugated plate (31) near the second angle structure (32) to cut off the corrugations on the second planar corrugated plate (31) that do not need to be connected to the second corrugated angle connector (322).

10. A polyhedral cryogenic liquid cargo storage tank (00) according to claim 8, characterized in that, The first bend is disposed on the first positive surface (15), which is the surface with the most adjacent surfaces in the main shielding layer (10); The second bend is disposed on the second positive surface, which is the surface with the most adjacent surfaces in the secondary shielding layer (30); When the corrugations on the first positive surface (15) are connected to the first angled structure (12) through the first bend, the corrugations extend past the intersection point (19) of the first guideline before connecting to the first bend, or the corrugations do not extend to the intersection point (19) of the first guideline before connecting to the first bend. When the corrugations on the second positive surface are connected to the second angle structure (32) through the second bend, the corrugations extend past the intersection of the second guideline before connecting with the second bend, or the corrugations do not extend to the intersection of the second guideline before connecting with the second bend.

Images