Sealing structure for thin film enclosure system and thin film enclosure system

Abstract

The invention provides a sealing structure for a thin film enclosure system and the thin film enclosure system. A sealing structure for a thin film enclosure system comprises a main shielding layer, a middle layer and a secondary shielding layer which are sequentially arranged from inside to outside. The main shielding layer comprises a main layer corrugated plate, and the main layer corrugated plate comprises a main plane part and a main corrugated part which are integrally connected with each other; the secondary shielding layer comprises a secondary corrugated plate; the secondary corrugated plate comprises a secondary plane part and a secondary corrugated part which are integrally connected with each other; the middle layer comprises a hard supporting plate and a flexible liner, and the hard supporting plate is located above the secondary plane part; the flexible liner comprises a flat part, and the flat part is located between the hard supporting plate and the secondary plane part; the flexible gasket further comprises an extending part, and the extending part is arranged in the circumferential direction of the flat part and covers the secondary corrugated part. The flexible liner is arranged between the rigid supporting plate and the secondary shielding layer, the flexible liner can prevent the rigid supporting plate from directly colliding with the secondary shielding layer, and the technical effect of damping and buffering is achieved.

Description

Technical Field

[0001] This invention relates to the field of marine LNG storage tanks, and more specifically, to a sealing structure for a membrane enclosure system and a membrane enclosure system. Background Technology

[0002] Membrane enclosure systems are enclosure structures used in liquefied natural gas (LNG) storage tanks and transport vessels to hold LNG. There are various types of membrane enclosure systems. One typical arrangement consists of, from the inside out, a main shielding layer, plywood, a secondary shielding layer, an insulation box (which provides thermal insulation), resin sealant, and an outer shell. The plywood is located between the main and secondary shielding layers and is directly installed on the secondary shielding layer using anchors.

[0003] In this arrangement, since both the plywood and the secondary shielding layer are rigid materials and are in direct contact, collisions will occur between the plywood and the secondary shielding layer when the ship rocks or when the LNG inside sloshes and pounds. If the anchors become loose, these collisions will be more pronounced. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a sealing structure for a membrane enclosure system and a membrane enclosure system.

[0005] According to the present invention, a sealing structure for a membrane enclosure system includes a main shielding layer, an intermediate layer, and a secondary shielding layer arranged sequentially from the inside to the outside. The main shielding layer includes a main corrugated plate, which includes a main planar portion and a main corrugated portion integrally connected to each other; the protrusions of the main corrugated portion face the interior of the sealing structure for the membrane enclosure system; The secondary shielding layer includes a secondary corrugated plate, which includes a secondary planar portion and a secondary corrugated portion integrally connected to each other; the protrusions of the secondary corrugated portion face the interior of the sealing structure for the membrane enclosure system. The intermediate layer includes a rigid support plate and a flexible pad, with the rigid support plate located above the subplanar portion; the flexible pad includes a flat portion located between the rigid support plate and the subplanar portion. The flexible pad also includes an extension that is arranged circumferentially along the flat portion and covers the secondary corrugated portion.

[0006] Preferably, the main planar portion and the main corrugated portion are arranged opposite to the secondary planar portion and the secondary corrugated portion, respectively; There is a first gap between the main planar portion and the secondary planar portion; there is a second gap between the main corrugated portion and the secondary corrugated portion; the flat portion is located within the first gap; and the protruding portion is located within the second gap.

[0007] Preferably, the flexible liner is made of glass fiber polypropylene composite material; or The flexible liner is made of fiberglass cloth and aerogel adhesive board; or The flexible liner is made of insulating foam; or The flexible liner is made of vacuum insulation board.

[0008] Preferably, the secondary shielding layer includes multiple secondary corrugated plates, with adjacent secondary corrugated plates being welded together. One of the adjacent secondary corrugated plates has a shoulder, the height of which is higher than the welded edge of the other secondary corrugated plate. A flexible gasket covers the shoulder of one corrugated plate and the welded edge of the other corrugated plate.

[0009] Preferably, the projection of the rigid support plate and the secondary corrugated portion in the vertical direction do not coincide.

[0010] Preferably, the protruding part is pressed and formed; Alternatively, the protruding part may be rolled from the same material as the flat part.

[0011] Preferably, the upper surface of the protrusion matches the shape of the main corrugated portion and fits snugly against each other; The lower surface of the protrusion matches the shape of the secondary corrugated part and fits together.

[0012] Preferably, the connection between the main planar portion and the main corrugated portion is supported by the protruding portion.

[0013] Preferably, it includes multiple flexible pads, with adjacent protrusions of two adjacent flexible pads located within the same second gap; An airflow channel is provided between the two protrusions.

[0014] According to the present invention, a membrane enclosure system is provided, employing the sealing structure of the membrane enclosure system.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a flexible pad between the rigid support plate and the secondary shielding layer. The flexible pad can prevent the rigid support plate and the secondary shielding layer from direct collision, thereby achieving the technical effect of shock absorption and buffering.

[0016] 2. The present invention, through the design of a flexible pad, can play a leveling role at the shoulder of the secondary corrugated board, avoiding the complicated operation of cutting grooves at the corresponding positions on the bottom of the plywood to accommodate the shoulder.

[0017] 3. The flexible pad in this invention includes a protruding part. By extending the protruding part into the second gap, it can support the connection between the main flat part and the main corrugated part, making the support of the main corrugated plate more stable. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure after the main shielding layer is hidden; Figure 4 This is a schematic diagram of the structure of the flexible pad of the present invention; Figure 5 This is a schematic diagram of the structure of an embodiment of the present invention where the protruding part is rolled into shape; Figure 6 This is a schematic diagram illustrating the structure of the airflow channel in this invention; Figure 7 This is a schematic diagram illustrating the structure of the present invention, showing the flexible padding covering the shoulder and welded edge; Figure 8 This is a schematic diagram of an embodiment of the present invention where the main planar portion is located above the secondary corrugated portion in the vertical direction, and the main corrugated portion is located above the secondary planar portion in the vertical direction. Reference numerals: 1. Main shielding layer; 2. Intermediate layer; 3. Secondary shielding layer; 4. First gap; 5. Second gap; 6. Shoulder; 7. Airflow channel; 8. Welding edge; 11. Main flat portion; 12. Main corrugated portion; 13. Connection; 21. Rigid support plate; 22. Flexible pad; 31. Secondary flat portion; 32. Secondary corrugated portion; 221. Flat portion; 222. Protrusion. Detailed Implementation

[0019] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0020] A sealing structure for a membrane enclosure system provided by the present invention, such as Figures 1-4 , Figure 8As shown, the system includes a main shielding layer 1, an intermediate layer 2, and a secondary shielding layer 3 arranged sequentially from the inside out. The main shielding layer 1 includes a main corrugated plate, which comprises an integrally connected main planar portion 11 and a main corrugated portion 12. The secondary shielding layer 3 includes a secondary corrugated plate, which comprises an integrally connected secondary planar portion 31 and a secondary corrugated portion 32. The protrusions of the main corrugated portion 12 face the interior of the sealing structure for the membrane enclosure system. The protrusions of the secondary corrugated portion 32 face the interior of the sealing structure for the membrane enclosure system. The interior is... Figure 1 The direction of the vertical upward arrow in the middle. The intermediate layer 2 includes a rigid support plate 21 and a flexible pad 22, and the flat portion 221 and the protruding portion 222 can be integrally connected from the same material. The rigid support plate 21 and the flexible pad 22 are assembled and installed on the sub-flat portion 31. Specifically, the rigid support plate 21 is located above the sub-flat portion 31; the flexible pad 22 includes a flat portion 221, which is located between the rigid support plate 21 and the sub-flat portion 31; the flexible pad 22 also includes a protruding portion 222, which is arranged circumferentially along the flat portion 221 and covers the sub-corrugated portion 32, and is supported by the sub-corrugated portion 32. The rigid support plate 21 includes plywood or a heat-insulating support plate.

[0021] In a preferred embodiment, the main planar portion 11 and the main corrugated portion 12 are respectively arranged opposite to the secondary planar portion 31 and the secondary corrugated portion 32; a first gap 4 exists between the main planar portion 11 and the secondary planar portion 31; a second gap 5 exists between the main corrugated portion 12 and the secondary corrugated portion 32, and the protrusion 222 is located within the second gap 5; the flat portion 221 is located within the first gap 4 and is situated between the rigid support plate 21 and the secondary planar portion 31. The rigid support plate 21 and the flexible gasket 22 can be adhesively connected; the rigid support plate 21 and the secondary shielding layer 3 can be connected via a connector, the connector penetrating the flat portion 221; in this embodiment, the protrusion 222 located within the second gap 5 can achieve the technical effect of blocking part of the airflow in the second gap 5. This design can reduce the thermosiphon phenomenon caused by airflow in the LNG storage tank and further improve the thermal insulation performance of the membrane enclosure system. In another preferred embodiment, such as Figure 8 As shown, the main planar portion 11 and the main corrugated portion 12 are not arranged opposite to the secondary planar portion 31 and the secondary corrugated portion 32. Specifically, the main planar portion 11 is located above the secondary corrugated portion 32 in the vertical direction, and the main corrugated portion 12 is located above the secondary planar portion 31 in the vertical direction. The main shielding layer 1 and the secondary shielding layer 3 are separated by a rigid support plate 21 and a flexible pad 22.

[0022] This invention incorporates a flexible pad 22 (the flexibility can be understood as compressibility) between the rigid support plate 21 and the secondary shielding layer 3. The flexible pad 22 prevents direct collision between the rigid support plate 21 and the secondary shielding layer 3, providing shock absorption and cushioning. Furthermore, and more preferably, the flexible pad 22 is made of a flexible thermal insulation material, thus enhancing thermal insulation while providing shock absorption and cushioning. Specifically, the flexible pad 22 can be made of glass fiber polypropylene composite material, glass fiber cloth and aerogel bonded material, thermal insulation foam material, or vacuum insulation board material.

[0023] The secondary shielding layer 3 comprises multiple secondary corrugated plates, with adjacent secondary corrugated plates welded together; for example... Figure 7 As shown, specifically, one of two adjacent secondary corrugated plates has a shoulder 6, the height of which is higher than the welded edge 8 of the other secondary corrugated plate. Normally, to keep the plywood above the secondary shielding layer 3 parallel to the secondary shielding layer 3, a receiving groove needs to be opened on the bottom surface of the plywood to accommodate the shoulder 6, which is higher than the secondary plane portion 31. However, this invention provides a flexible pad 22 below the rigid support plate 21, and the flexible pad 22 covers the shoulder 6 of one corrugated plate and the welded edge 8 of the other corrugated plate. Due to the flexibility (or compressibility) of the flexible pad 22, even without opening a receiving groove on the bottom surface of the plywood, the rigid support plate 21 above the secondary shielding layer 3 can be kept parallel to the secondary shielding layer 3. In this case, the flexible pad 22 fully utilizes its leveling effect.

[0024] In the embodiment of the present invention where the main planar portion 11 and the main corrugated portion 12 are arranged opposite to the secondary planar portion 31 and the secondary corrugated portion 32, the connection 13 between the main planar portion 11 and the main corrugated portion 12 is supported by the protruding portion 222, rather than by the rigid support plate 21. That is, in the present invention, the projections of the rigid support plate 21 and the secondary corrugated portion 32 in the thickness direction of the membrane enclosure system (i.e., the vertical direction in the figure) do not coincide.

[0025] In a preferred embodiment, the protrusion 222 is press-formed; or as... Figure 5 As shown, the protrusion 222 is rolled from the same material as the flat portion 221. The upper surface of the protrusion 222 matches the shape of the main corrugated portion 12; the lower surface of the protrusion 222 matches the shape of the secondary corrugated portion 32.

[0026] In a preferred example, such as Figure 6As shown, the sealing structure for the membrane enclosure system includes multiple flexible gaskets 22, with adjacent protrusions 222 of two adjacent flexible gaskets 22 located within the same second gap 5; an airflow channel 7 is provided between the two protrusions 222. This airflow channel 7 allows nitrogen gas to circulate and flow within the second gap 5, and the flowing nitrogen gas is used to maintain a slight positive pressure in the second gap 5 and for detecting LNG leaks in the second gap 5.

[0027] According to the present invention, a membrane enclosure system is provided, employing the sealing structure of the membrane enclosure system.

[0028] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A sealing structure for a membrane enclosure system, characterized in that, It includes a main shielding layer (1), an intermediate layer (2), and a secondary shielding layer (3) arranged sequentially from the inside out. The main shielding layer (1) includes a main corrugated plate, which includes a main planar portion (11) and a main corrugated portion (12) integrally connected to each other; the protrusion direction of the main corrugated portion (12) faces the interior of the sealing structure for the membrane enclosure system; The secondary shielding layer (3) includes a secondary corrugated plate, which includes a secondary planar portion (31) and a secondary corrugated portion (32) integrally connected to each other; the protrusion direction of the secondary corrugated portion (32) faces the interior of the sealing structure for the membrane enclosure system; The intermediate layer (2) includes a rigid support plate (21) and a flexible pad (22), with the rigid support plate (21) located above the sub-planar portion (31); the flexible pad (22) includes a flat portion (221), which is located between the rigid support plate (21) and the sub-planar portion (31). The flexible pad (22) also includes a protrusion (222) which is arranged circumferentially along the flat portion (221) and covers the secondary corrugated portion (32).

2. The sealing structure for a membrane enclosure system as described in claim 1, characterized in that, The main planar portion (11) and the main corrugated portion (12) are respectively arranged opposite to the secondary planar portion (31) and the secondary corrugated portion (32); There is a first gap (4) between the main flat portion (11) and the secondary flat portion (31); there is a second gap (5) between the main corrugated portion (12) and the secondary corrugated portion (32); the flat portion (221) is located in the first gap (4); the protruding portion (222) is located in the second gap (5).

3. The sealing structure for a membrane enclosure system as described in claim 1, characterized in that, The flexible liner (22) is made of glass fiber polypropylene composite material; or The flexible pad (22) is made of fiberglass cloth and aerogel adhesive board; or The flexible liner (22) is made of insulating foam; or The flexible liner (22) is made of vacuum insulation board.

4. The sealing structure for a membrane enclosure system as described in claim 1, characterized in that, The secondary shielding layer (3) includes multiple secondary corrugated plates. Two adjacent secondary corrugated plates are welded together. One of the two adjacent secondary corrugated plates has a shoulder (6). The height of the shoulder (6) is higher than the welded edge (8) of the other secondary corrugated plate. The flexible pad (22) covers the shoulder (6) of one corrugated plate and the welded edge (8) of the other corrugated plate.

5. The sealing structure for a membrane enclosure system as described in claim 1 or 2, characterized in that, The projections of the rigid support plate (21) and the secondary corrugated part (32) in the vertical direction do not coincide.

6. The sealing structure for a membrane enclosure system as described in claim 1, characterized in that, The protruding part (222) is pressed and molded; The protruding part (222) is formed by rolling the same material as the flat part (221).

7. The sealing structure for a membrane enclosure system as described in claim 2, characterized in that, The upper surface of the protrusion (222) matches the shape of the main corrugated part (12) and fits together; The lower surface of the protrusion (222) matches the shape of the secondary corrugated portion (32) and fits together.

8. The sealing structure for a membrane enclosure system as described in claim 2, characterized in that, The connection (13) between the main flat portion (11) and the main corrugated portion (12) is supported by the protruding portion (222).

9. The sealing structure for a membrane enclosure system as described in claim 2, characterized in that, It includes multiple flexible pads (22), and the two adjacent protrusions (222) of two adjacent flexible pads (22) are located in the same second gap (5); An airflow channel (7) is provided between the two protrusions (222).

10. A membrane enclosure system, characterized in that, The sealing structure for the membrane enclosure system according to any one of claims 1-9 is adopted.

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