Membrane containment system for LNG carriers

Abstract

The present invention relates to the field of shipbuilding technology, and in particular to a membrane-type containment system for LNG carriers. The containment system comprises: a main shielding layer, the inner side of which contacts LNG; a main thermal insulation layer, which is arranged on the outer side of the main shielding layer; a secondary thermal insulation layer, which is arranged on the outer side of the main thermal insulation layer; a secondary thermal insulation layer, which is arranged on the outer side of the secondary thermal insulation layer; a load-bearing putty, which is arranged between the outer side of the secondary thermal insulation layer and the load-bearing inner wall of the cabin of the carrier; wherein an inwardly extending anchoring structure is arranged on the load-bearing inner wall of the cabin, and the anchoring structure passes through the secondary thermal insulation layer and the secondary thermal insulation layer, fixes the secondary thermal insulation layer and the secondary thermal insulation layer to the load-bearing inner wall of the cabin, and is used to provide deformation freedom for the main thermal insulation layer and the secondary thermal insulation layer. In the present invention, the secondary thermal insulation layer is connected by the anchoring structure, which can provide deformation freedom for the containment system and avoid mutual tearing between different structural layers of the containment system.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a membrane type containment system for an LNG carrier. Background Art

[0002] At present, LNG (liquefied natural gas) carriers are the main means of transporting imported LNG (liquefied natural gas). In addition, LNG carriers generally use membrane containment systems. The temperature of liquefied natural gas loaded in the membrane containment system is very low, reaching -162°C, which will cause the membrane containment system to shrink and deform.

[0003] In the prior art, the membrane type containment system generally includes two layers, each layer is set as a shielding structure on the inside and a heat insulation structure on the outside, and finally forms four overlapping structural layers. The existing membrane type protection system usually combines different structural layers together by fixed connection. However, due to the different shrinkage rates of different materials, different structural layers will tear each other, damaging the sealing integrity of the membrane type protection system, and even reducing the safety and durability of LNG carriers. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a membrane type containment system for LNG carriers to provide the containment system with a degree of freedom of deformation, so that the structural layer of the containment system can be freely deformed and displaced within a small range to ensure the integrity of the seal.

[0005] The present invention provides a membrane type containment system for an LNG carrier, the containment system comprising: A primary shielding layer, the inner side of which contacts the LNG; A main heat-insulating layer, arranged on the outside of the main shielding layer; A secondary shielding layer, arranged on the outside of the primary thermal insulation layer; A secondary heat insulation layer, arranged on the outer side of the secondary shielding layer; Load-bearing mortar, arranged between the outer side of the secondary insulation layer and the load-bearing inner wall of the cabin of the transport ship; Among them, an inwardly extending anchoring structure is provided on the load-bearing inner wall of the cabin, and the anchoring structure passes through the secondary insulation layer and the secondary shielding layer to fix the secondary insulation layer and the secondary shielding layer to the load-bearing inner wall of the cabin, so as to provide deformation freedom for the main insulation layer and the secondary insulation layer.

[0006] According to a membrane-type containment system for an LNG carrier provided by the present invention, the secondary insulation layer comprises a secondary insulation module and a pre-pressurized insulation filling module; A plurality of the secondary insulation modules are arranged and distributed in a matrix form, and the pre-compression insulation filling module is embedded between adjacent secondary insulation modules to compensate for the deformation of the secondary insulation modules when they shrink due to cold; The anchoring structure has two anchor rods arranged in parallel and at intervals. The anchoring structure spans over the pre-compression heat-insulating filling module and is respectively connected with the adjacent secondary heat-insulating modules through the anchor rods.

[0007] According to a membrane-type containment system for an LNG carrier provided by the present invention, the anchoring structure comprises a pad and a clamping plate, the pad is provided with a first elongated hole, the clamping plate is provided with a second elongated hole, the pad and the clamping plate are overlapped and installed on the top of the anchor rod, the first elongated hole is aligned with the second elongated hole and is sleeved on the anchor rod.

[0008] According to a membrane-type containment system for an LNG carrier provided by the present invention, the anchoring structure includes a locking cap sleeved on the anchor rod, the diameter of the first elongated hole is the same as the diameter of the anchor rod, the diameter of the second elongated hole is the same as the diameter of the locking cap, the locking cap is embedded in the second elongated hole and the top surface of the locking cap is lower than the plate surface of the clamping plate.

[0009] According to a membrane-type containment system for an LNG carrier provided by the present invention, the main insulation layer and the secondary shielding layer are bonded by glue, and the main insulation layer is composed of a main insulation module and the pre-pressed insulation filling module; A plurality of the main insulation modules are arranged and distributed in a matrix form, and the pre-compression insulation filling module is embedded between adjacent main insulation modules to compensate for the deformation of the main insulation modules when they shrink due to cold.

[0010] According to a membrane-type containment system for an LNG carrier provided by the present invention, the secondary shielding layer is composed of two layers of glass fiber and an aluminum sheet located between the two layers of glass fiber, the glass fiber is used to provide mechanical bearing performance, and the aluminum sheet is used to provide sealing performance.

[0011] According to a membrane-type containment system for an LNG carrier provided by the present invention, the main insulation module includes a main plywood and a main insulation material which are stacked, the main plywood is located on the inner side and is in contact with the main shielding layer, and the main insulation material is located on the outer side and is in contact with the secondary shielding layer.

[0012] According to a membrane-type containment system for an LNG carrier provided by the present invention, the secondary thermal insulation module comprises a secondary plywood and a secondary thermal insulation material which are stacked, the secondary plywood being located on the outside and being in contact with the load-bearing mastic, and the secondary thermal insulation material being located on the inside and being in contact with the secondary shielding layer.

[0013] According to a membrane-type containment system for an LNG carrier provided by the present invention, a heat-insulating ring is provided on the outer side of the anchor rod, and the heat-insulating ring is made of glass wool.

[0014] According to a membrane-type containment system for an LNG carrier provided by the present invention, polyurethane coating is applied when the anchoring structure is connected to the secondary insulation module to ensure that the secondary insulation layer is completely closed.

[0015] The above one or more technical solutions in the present invention have at least one of the following technical effects: Connecting the secondary insulation layer through the anchoring structure can provide deformation freedom for the membrane type containment system, so that the secondary insulation layer can be freely deformed and displaced within a small range, avoiding mutual tearing between different structural layers of the membrane type containment system, ensuring the sealing integrity of the membrane type containment system, and thus greatly enhancing the safety and durability of LNG tankers.

[0016] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the partial structure of a membrane enclosure system provided in an embodiment of the present invention.

[0019] Figure 2 A schematic diagram of an anchoring structure provided in an embodiment of the present invention.

[0020] Figure 3 A schematic top view of a pad provided in an embodiment of the present invention.

[0021] Reference numerals: 100. Main shielding layer; 200. Main insulation layer; 210. Main insulation module; 211. Main plywood; 212. Main insulation material; 300. Secondary shielding layer; 400. Secondary insulation layer; 410. Secondary insulation module; 411. Secondary plywood; 412. Secondary insulation material; 413. Pre-compression insulation filling module; 500. Load-bearing putty; 600. Anchoring structure; 610. Anchor rod; 620. Pad; 621. First long hole; 630. Card plate; 631. Second long hole; 640. Locking cap; 650. Insulation ring; 660. Anchoring base; 700. Load-bearing inner wall of cabin. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted 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 embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] In the present invention, LNG is the abbreviation of liquefied natural gas (Liquefied Natural Gas). LNG refers to natural gas mainly composed of methane that is processed and cooled to about -162 degrees Celsius (-260 degrees Fahrenheit) under normal pressure to be converted into a liquid state.

[0028] At present, LNG (liquefied natural gas) carriers are the main means of transporting imported LNG (liquefied natural gas). In addition, LNG carriers generally use membrane-type containment systems. The membrane-type containment system generally includes two layers, the inner side of each layer is set as a shielding structure, and the outer side is set as a heat insulation structure, ultimately forming four overlapping structural layers.

[0029] In an embodiment of the present invention, a membrane containment system for an LNG carrier is introduced.

[0030] like Figure 1 As shown, the enclosure system mainly includes a primary shielding layer 100, a primary thermal insulation layer 200, a secondary shielding layer 300, a secondary thermal insulation layer 400 and a load-bearing mastic 500. Specifically, the load-bearing mastic 500, the secondary thermal insulation layer 400, the secondary shielding layer 300, the primary thermal insulation layer 200 and the primary shielding layer 100 are stacked in sequence from the load-bearing inner wall 700 of the cabin of the transport ship.

[0031] The main shielding layer 100 is located at the innermost side of the maintenance system and forms a closed cavity for storing LNG (liquefied natural gas). The inner side of the main shielding layer 100 is in direct contact with the LNG (liquefied natural gas). The main insulation layer 200 is arranged on the outer side of the main shielding layer 100. The secondary shielding layer 300 is arranged on the outer side of the main insulation layer 200. The secondary insulation layer 400 is arranged on the outer side of the secondary shielding layer 300. The load-bearing mastic 500 is arranged between the outer side of the secondary insulation layer 400 and the load-bearing inner wall 700 of the cabin of the transport ship.

[0032] like Figure 2 As shown, an inwardly extending anchoring structure 600 is provided on the cabin load-bearing inner wall 700. The anchoring structure 600 penetrates the secondary insulation layer 400 and the secondary shielding layer 300, fixes the secondary insulation layer 400 and the secondary shielding layer 300 to the cabin load-bearing inner wall 700, and is used to provide deformation freedom for the main insulation layer 200 and the secondary insulation layer 400.

[0033] The anchoring structure 600 includes: an anchoring base 660, an anchor rod 610, a pad 620, a clamping plate 630 and a locking cap 640. The anchoring base 660 is arranged at the bottom of the anchoring structure 600. The anchoring base 660 is connected to the load-bearing inner wall 700 of the cabin. The connection method of the anchoring base 660 and the load-bearing inner wall 700 of the cabin is welding. The anchoring base 660 is provided with a thread inside, and the anchor rod 610 is connected to the anchoring base 660 through the thread.

[0034] Preferably, the anchor structure 600 is designed to have a pull-out force of at least 4900 N to ensure that it can withstand a variety of loads.

[0035] The backing plate 620 is provided with a first elongated hole 621. The clamping plate 630 is provided with a second elongated hole 631. Moreover, the first elongated hole 621 and the second elongated hole 631 are arranged in alignment. The diameter of the first elongated hole 621 is the same as the diameter of the anchor rod 610. The diameter of the second elongated hole 631 is the same as the diameter of the locking cap 640. The clamping plate 630 is provided with the second elongated hole 631, which can release a certain degree of freedom when the secondary insulation layer 400 is deformed, so as to achieve deformation coordination between adjacent secondary insulation modules 410.

[0036] Furthermore, the anchor rod 610 extends vertically inward from the load-bearing inner wall 700 of the cabin and passes through the secondary insulation layer 400, thereby ensuring that the position of the secondary insulation layer 400 is fixed.

[0037] In particular, the secondary insulation layer 400 is formed by splicing a plurality of secondary insulation modules 410. The pad 620 of the anchoring structure 600 is arranged across the connection between two adjacent secondary insulation modules 410. The anchor rod 610 is inserted into the first long hole 621 of the pad 620. The anchor rods 610 located at both ends of the pad 620 are respectively connected with different secondary insulation modules 410. The pad 620 can move in the horizontal direction relative to the anchor rod 610 through the first long hole 621, so as to allow the secondary insulation layer 400 to have a certain amount of free displacement and realize a small range displacement of the secondary insulation layer 400.

[0038] In this embodiment, the secondary insulation layer 400 is connected by the anchoring structure 600, which can provide deformation freedom for the membrane type containment system, so that the secondary insulation layer 400 can be freely deformed and displaced within a small range, avoiding mutual tearing between different structural layers of the membrane type containment system, ensuring the sealing integrity of the membrane type containment system, and thus greatly enhancing the safety and durability of the LNG transport ship.

[0039] Based on the above embodiment, in another embodiment of the present invention, a membrane type containment system for an LNG carrier is introduced.

[0040] The secondary thermal insulation layer 400 includes a secondary thermal insulation module 410 and a pre-compression thermal insulation filling module 413 .

[0041] The plurality of secondary insulation modules 410 are arranged and distributed in a matrix form. The pre-compression insulation filling modules 413 are embedded between adjacent secondary insulation modules 410 to compensate for the deformation of the secondary insulation modules 410 when they shrink due to cold.

[0042] The pre-pressed heat-insulating filling module 413 is made of elastic material and is pre-pressed before filling, so as to realize self-adjustment of thermal deformation and compensate for the deformation displacement caused by thermal expansion and contraction of the adjacent secondary heat-insulating module 410 .

[0043] The anchoring structure 600 has two anchor rods 610 arranged in parallel and spaced apart. The anchoring structure 600 crosses the pre-compression heat insulation filling module 413. Moreover, the anchoring structure 600 is connected with the adjacent secondary heat insulation modules 410 respectively through the anchor rods 610.

[0044] Furthermore, the anchoring structure 600 includes a backing plate 620 and a clamping plate 630. The backing plate 620 is provided with a first elongated hole 621. The clamping plate 630 is provided with a second elongated hole 631. The backing plate 620 and the clamping plate 630 are overlapped and installed on the top of the anchor rod 610.

[0045] The first elongated hole 621 and the second elongated hole 631 are aligned and sleeved on the anchor rod 610 .

[0046] Furthermore, the anchoring structure 600 includes a locking cap 640 sleeved on the anchor rod 610 .

[0047] like Figure 3 As shown, the diameter of the first elongated hole 621 is the same as the diameter of the anchor rod 610. The diameter of the second elongated hole 631 is the same as the diameter of the locking cap 640. The locking cap 640 is embedded in the second elongated hole 631. In addition, the top surface of the locking cap 640 is lower than the plate surface of the clamping plate 630 to prevent the locking cap 640 from blocking the displacement of the insulation module and ensure that a certain degree of freedom is released when the insulation module is deformed.

[0048] Based on the above embodiment, in another embodiment of the present invention, a membrane type containment system for an LNG carrier is introduced.

[0049] The main heat insulation layer 200 is bonded to the secondary shielding layer 300 by glue. The main heat insulation layer 200 is composed of a main heat insulation module 210 and the pre-pressed heat insulation filling module 413 .

[0050] The plurality of main insulation modules 210 are arranged and distributed in a matrix form. The pre-compression insulation filling modules 413 are embedded between adjacent main insulation modules 210 to compensate for the deformation of the main insulation modules 210 when they shrink due to cold.

[0051] Preferably, the material of the pre-compression heat-insulating filling module 413 is polyurethane foam or glass wool, because they are elastic and can be pre-compressed before filling, thereby compensating for the deformation of the main heat-insulating module 210 when it shrinks due to cold.

[0052] Based on the above embodiment, in another embodiment of the present invention, a membrane type containment system for an LNG carrier is introduced.

[0053] The secondary shielding layer 300 is composed of two layers of glass fiber and an aluminum sheet located between the two layers of glass fiber. The glass fiber is used to provide mechanical bearing performance. The aluminum sheet is used to provide sealing performance.

[0054] Based on the above embodiment, in another embodiment of the present invention, a membrane type containment system for an LNG carrier is introduced.

[0055] A pre-compression insulation filling module 413 is arranged between adjacent main insulation modules 210. The main insulation module 210 comprises a stacked main plywood 211 and a main insulation material 212. The main plywood 211 is located on the inner side and is attached to the main shielding layer 100. The main insulation material 212 is located on the outer side and is attached to the secondary shielding layer 300.

[0056] Furthermore, the secondary heat insulation module 410 includes a stacked secondary plywood 411 and a secondary heat insulation material 412. The secondary plywood 411 is located on the outside and is attached to the load-bearing adhesive 500. The secondary heat insulation material 412 is located on the inside and is attached to the secondary shielding layer 300.

[0057] Specifically, the main plywood 211 is bonded to the main heat-insulating material 212 by glue. The secondary plywood 411 is bonded to the secondary heat-insulating material 412 by glue. Moreover, in the vertical direction of the cabin load-bearing inner wall 700, the main plywood 211 and the main heat-insulating material 212 are sequentially overlapped from the cabin to the cabin load-bearing inner wall 700. The secondary plywood 411 and the secondary heat-insulating material 412 are sequentially overlapped from the cabin load-bearing inner wall 700 to the cabin, which is exactly the opposite of the structure of the main heat-insulating module 210.

[0058] In order to prevent the anchor rod 610 from transferring heat, a heat preservation ring 650 is provided on the outer side of the anchor rod 610. The heat preservation ring 650 is made of glass wool.

[0059] Furthermore, when the anchoring structure 600 is connected to the secondary insulation module 410 , polyurethane paint is applied to ensure that the secondary insulation layer 400 is completely sealed.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these 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 invention.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A membrane containment system for an LNG carrier, characterized in that: include: A main shielding layer (100), the inner side of the main shielding layer (100) contacts the LNG; A main heat insulation layer (200) is arranged outside the main shielding layer (100); A secondary shielding layer (300) is arranged outside the primary heat insulation layer (200); A secondary heat insulation layer (400) arranged outside the secondary shielding layer (300); The load-bearing mortar (500) is arranged between the outer side of the secondary heat insulation layer (400) and the load-bearing inner wall (700) of the cabin of the transport ship; The ship cabin load-bearing inner wall (700) is provided with an inwardly extending anchoring structure (600), the anchoring structure (600) penetrates the secondary thermal insulation layer (400) and the secondary shielding layer (300), fixes the secondary thermal insulation layer (400) and the secondary shielding layer (300) to the ship cabin load-bearing inner wall (700), and is used to provide deformation freedom for the primary thermal insulation layer (200) and the secondary thermal insulation layer (400).

2. The membrane type containment system for LNG carrier according to claim 1, characterized in that: The secondary thermal insulation layer (400) comprises a secondary thermal insulation module (410) and a pre-pressed thermal insulation filling module (413); A plurality of the secondary thermal insulation modules (410) are arranged and distributed in a matrix form, and the pre-compression thermal insulation filling modules (413) are embedded between adjacent secondary thermal insulation modules (410) to compensate for deformation of the secondary thermal insulation modules (410) when they shrink due to cold; The anchoring structure (600) has two anchor rods (610) arranged in parallel and at intervals. The anchoring structure (600) spans the pre-pressed heat-insulating filling module (413) and is respectively connected to the adjacent secondary heat-insulating modules (410) through the anchor rods (610).

3. The membrane type containment system for LNG carrier according to claim 2, characterized in that: The anchoring structure (600) comprises a pad (620) and a clamping plate (630), wherein the pad (620) is provided with a first elongated hole (621), and the clamping plate (630) is provided with a second elongated hole (631), and the pad (620) and the clamping plate (630) are overlapped and installed on the top of the anchor rod (610), and the first elongated hole (621) and the second elongated hole (631) are aligned and sleeved on the anchor rod (610).

4. The membrane type containment system for LNG carrier according to claim 3, characterized in that: The anchoring structure (600) includes a locking cap (640) sleeved on the anchor rod (610), the diameter of the first elongated hole (621) is the same as the diameter of the anchor rod (610), the diameter of the second elongated hole (631) is the same as the diameter of the locking cap (640), the locking cap (640) is embedded in the second elongated hole (631) and the top surface of the locking cap (640) is lower than the plate surface of the clamping plate (630).

5. The membrane containment system for LNG carrier according to any one of claims 2 to 4, characterized in that: The main thermal insulation layer (200) and the secondary shielding layer (300) are bonded together by glue, and the main thermal insulation layer (200) is composed of a main thermal insulation module (210) and the pre-pressed thermal insulation filling module (413); A plurality of the main thermal insulation modules (210) are arranged and distributed in a matrix form, and the pre-compression thermal insulation filling modules (413) are embedded between adjacent main thermal insulation modules (210) to compensate for deformation of the main thermal insulation modules (210) when they shrink due to cold.

6. The membrane type containment system for LNG carrier according to claim 5, characterized in that: The secondary shielding layer (300) is composed of two layers of glass fiber and an aluminum sheet located between the two layers of glass fiber, wherein the glass fiber is used to provide mechanical bearing performance, and the aluminum sheet is used to provide sealing performance.

7. The membrane type containment system for LNG carrier according to claim 6, characterized in that: The primary heat insulation module (210) comprises a primary plywood (211) and a primary heat insulation material (212) which are stacked, the primary plywood (211) being located on the inner side and in contact with the primary shielding layer (100), and the primary heat insulation material (212) being located on the outer side and in contact with the secondary shielding layer (300).

8. The membrane type containment system for LNG carrier according to claim 7, characterized in that: The secondary thermal insulation module (410) comprises a secondary plywood (411) and a secondary thermal insulation material (412) which are stacked, wherein the secondary plywood (411) is located on the outside and in contact with the load-bearing mortar (500), and the secondary thermal insulation material (412) is located on the inside and in contact with the secondary shielding layer (300).

9. The membrane containment system for LNG carrier according to any one of claims 2 to 4, characterized in that: The outer side of the anchor rod (610) is sleeved with a heat-insulating ring (650), and the heat-insulating ring (650) is made of glass wool.

10. The membrane containment system for LNG carrier according to any one of claims 2 to 4, characterized in that: When the anchoring structure (600) is connected to the secondary thermal insulation module (410), polyurethane paint is applied to ensure that the secondary thermal insulation layer (400) is completely sealed.

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