Corner structure of membrane enclosure system

Abstract

This invention discloses a corner structure for a membrane enclosure system. The secondary insulation layer includes a first insulation box and a second insulation box, each with a first length, located on either side of the corner. The secondary shielding layer has a first wave spacing and includes a first metal reinforcing plate and first corrugated corner plates fixed only to it on both sides, with the first corrugated corner plates connecting at least two adjacent insulation boxes. The main insulation layer includes a first main insulation box and a second main insulation box, each with a second length. The main shielding layer has a second wave spacing and includes a second metal reinforcing plate and first main corrugated corner plates fixed only to it on both sides, with the first main corrugated corner plates connecting at least two adjacent insulation boxes. Multiple corrugations are provided on the first corrugated corner plates and / or the first main corrugated corner plates. This invention improves the corner deformation coordination, reduces stress concentration, and extends service life by limiting the fixing method, placement, and number of corrugations on the corrugated corner plates.

Description

Technical Field

[0001] This invention relates to the field of liquefied gas storage tank technology, and more specifically to a corner structure of a membrane enclosure system. Background Technology

[0002] Membrane enclosure systems are widely used in liquefied natural gas (LNG) carriers and cryogenic storage tanks. They form the core liquid sealing and thermal insulation structure, typically comprising a primary shielding layer, a primary insulation layer, a secondary shielding layer, and a secondary insulation layer. The primary and secondary shielding layers are made of metal film sheets with a corrugated structure to absorb thermal deformation in cryogenic environments, requiring them to maintain structural integrity and sealing performance at extremely low temperatures.

[0003] The mounting surface of a membrane enclosure system consists of multiple planar areas and corner areas. Planar areas are large, flat areas between adjacent walls, while corner areas are the junctions where two or more planar areas meet. At the corner areas, membrane panels from planar areas in different directions need to be connected and transitioned to ensure the continuity and sealing of the shielding layer.

[0004] In existing technologies, to achieve a corrugated transition between planar and corner areas, a dedicated corner corrugated structure is typically set in the corner area. However, planar corrugations are usually evenly distributed along a single direction, resulting in relatively uniform stretching performance; corner corrugations, on the other hand, need to adapt to multi-directional deformation coordination, have more complex geometry, and their corrugation direction changes, leading to differences in stretching performance after the corner corrugations and planar corrugations are connected.

[0005] This difference in stretchability causes the following problems in actual operation: First, the corrugation deformation in the corner area is uneven, and the deformation of different parts varies significantly under temperature load, resulting in an overall uncoordinated deformation. Second, the deformation capacity at the connection between the corrugations in the corner area and the corrugations in the planar area is mismatched, and thermal stress cannot be released evenly, resulting in stress concentration. Under repeated temperature cyclic loading, fatigue cracks are easily initiated. Third, uneven deformation and stress concentration are coupled with each other, leading to the accumulation of fatigue damage to the membrane material in the corner area after long-term operation, and even cracking and leakage, thus shortening the service life of the membrane enclosure system.

[0006] In summary, the mismatch in stretching performance between the corner corrugations and the planar corrugations in existing membrane enclosure systems leads to uneven deformation and stress concentration, which seriously affects service life and operational safety. There is an urgent need for a corner structure design scheme that can improve deformation coordination and reduce stress concentration. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the defects in the existing membrane enclosure system, namely, the mismatch in the stretching performance of the corner corrugations and the planar corrugations after connection, which leads to uneven deformation and stress concentration of the corner corrugations. The invention provides a corner structure that can improve the deformation coordination between the corner corrugations and the planar corrugations, effectively reduce stress concentration, and improve the reliability and service life of the membrane enclosure system.

[0008] To address the aforementioned technical problems, this invention provides a corner structure for a membrane enclosure system, comprising, arranged sequentially from the outside in: The secondary insulation layer includes a first insulation layer and a second insulation layer respectively disposed on two sides of the corner area. The first insulation layer includes a plurality of first insulation boxes disposed along the length direction of the corner area. The second insulation layer includes a plurality of second insulation boxes disposed along the length direction of the corner area. The length of the first insulation box and the second insulation box is a first length. The secondary shielding layer includes a first metal reinforcing plate corresponding to the first insulation box and the second insulation box. The first metal reinforcing plate is used to connect the first insulation box and the second insulation box. The first metal reinforcing plate is covered with a first corrugated corner plate. The corrugations on the secondary shielding layer have a first wave spacing. The first corrugated corner plate is welded and fixed to the first metal reinforcing plate only on both sides. The first corrugated corner plate connects at least two adjacent first insulation boxes and two adjacent second insulation boxes. The main insulation layer includes a first main insulation layer and a second main insulation layer respectively connected to the two sides of the secondary shielding layer. The first main insulation layer includes a plurality of first main insulation boxes arranged along the length direction of the corner area. The second main insulation layer includes a plurality of second main insulation boxes arranged along the length direction of the corner area. The length of the first main insulation box and the second main insulation box is a second length. The main shielding layer includes a second metal reinforcing plate corresponding to the first main insulation box and the second main insulation box. The second metal reinforcing plate is used to connect the first main insulation box and the second main insulation box. The second metal reinforcing plate is covered with a first main corrugated corner plate. The corrugations on the main shielding layer have a second wave pitch. The first main corrugated corner plate is fixedly connected to the second metal reinforcing plate only on both sides. The first main corrugated corner plate connects at least two adjacent first main insulation boxes and two adjacent second main insulation boxes. The first corrugated corner plate and / or the first main corrugated corner plate are provided with multiple corrugations.

[0009] Furthermore, the first wave spacing is greater than the second wave spacing.

[0010] Furthermore, the ratio of the first wave spacing to the second wave spacing is 3:2.

[0011] Furthermore, the first length and the second length are not less than the second wave spacing.

[0012] Furthermore, the first length is equal to the first wave spacing, and the first corrugated corner plate is set at the splice seam of the first insulation box.

[0013] Furthermore, the second length is equal to the first length.

[0014] Furthermore, the ratio of the second wave spacing to the second length is 2:3, the first main corrugated corner plate is provided with three corrugations, the first main corrugated corner plate is only welded and fixed to the second metal reinforcing plate on both sides, and the area of ​​the first main corrugated corner plate located in the middle of the welding and fixing position is separated from the second metal reinforcing plate.

[0015] Furthermore, there is a first gap between adjacent first insulation boxes and second insulation boxes, a second gap between opposite first insulation boxes and second insulation boxes, a third gap between adjacent first main insulation boxes and second main insulation boxes, and a fourth gap between opposite first main insulation boxes and second main insulation boxes.

[0016] Furthermore, the first gap and the third gap are offset.

[0017] Furthermore, the third gap between the two first main corrugated corner plates is covered by the side extension of the nearest first main corrugated corner plate, and the first gap between the first corrugated corner plates is covered by the side extension of the nearest first corrugated corner plate.

[0018] Furthermore, the first metal reinforcing plate and the second metal reinforcing plate are respectively fixed to the first insulation box, the second insulation box, the first main insulation box, and the second main insulation box by rivets.

[0019] Furthermore, the first insulation box, the second insulation box, the first main insulation box, and the second main insulation box all include a lower plywood, an insulation block, and an upper plywood. The upper plywood is provided with mounting holes for accommodating the rivets, and the diameter of the mounting holes is larger than the diameter of the rivets.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This invention fixes the first corrugated corner plate and the first main corrugated corner plate to the metal reinforcing plate by welding them to the metal reinforcing plate only on both sides. This allows the corrugated corner plate to freely expand and contract along the direction perpendicular to the corrugation extension during thermal deformation, avoiding the constraint stress caused by being completely fixed to the insulation layer. This effectively releases thermal deformation energy and reduces stress concentration in the corner area.

[0021] By limiting the connection position and number of corrugations of the corrugated corner plate, the dispersed expansion and contraction differences of the insulation layer are integrated, so that the deformation is evenly distributed on multiple corrugations of the entire corrugated corner plate. This ensures that the expansion and contraction deformation of the plate is evenly distributed, effectively reducing the risk of cracking and leakage caused by local stress concentration. At the same time, it reduces the requirements for plate forming and assembly precision, and improves the overall service life and sealing reliability of the membrane enclosure system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the secondary insulation layer structure in this invention; Figure 3 This is a schematic diagram of the first metal reinforcing plate structure in this invention; Figure 4 This is a schematic diagram of the first corrugated angle plate structure in this invention; Figure 5 This is a schematic diagram of the main insulation layer structure in this invention; Figure 6 This is a schematic diagram of the second metal reinforcing plate structure in this invention; Figure 7 This is a schematic diagram of the first main corrugated angle plate structure in this invention; Figure 8 This is a cross-sectional view of the riveting structure in this invention; Figure 9 yes Figure 8 Enlarged view of the structure in area A.

[0023] Explanation of the labels in the diagram: 11. First insulation layer; 12. Second insulation layer; 13. First insulation box; 14. Second insulation box; 15. First gap; 16. Second gap; 17. Lower plywood; 18. Insulation block; 19. Upper plywood; 20. Secondary shielding layer; 21. First metal reinforcing plate; 22. First corrugated corner plate; 23. Rivet; 31. First main insulation layer; 32. Second main insulation layer; 33. First main insulation box; 34. Second main insulation box; 35. Third gap; 36. Fourth gap; 37. Mounting hole; 40. Main shielding layer; 41. Second metal reinforcing plate; 42. First main corrugated corner plate; L1, first length; L2, second length; P1, first wave spacing; P2, second wave spacing. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] Reference Figure 1 The diagram shown is a schematic representation of the corner structure of the membrane enclosure system of the present invention. The corner area of ​​the present invention is a transition area where two planar areas meet and connect. This corner structure is used to connect the membrane structures of two adjacent planar areas, realizing the liquid sealing and thermal insulation functions of the membrane enclosure system at the corner location.

[0026] Specifically, the corner structure of the present invention is provided with a secondary insulation layer, a secondary shielding layer 20, a primary insulation layer and a primary shielding layer 40 in sequence from the outside to the inside, wherein the direction from the outside to the inside is the direction from the side away from the cryogenic liquid to the side closer to the cryogenic liquid.

[0027] Reference Figure 1 and Figure 2 As shown, the secondary insulation layer includes a first insulation layer 11 and a second insulation layer 12 respectively disposed on the two sides of the corner area. Taking the corner as the boundary, the two sides are the first side wall and the second side wall of the corner area, respectively. The first insulation layer 11 is laid along the first side wall and includes several first insulation boxes 13 arranged sequentially along the length direction of the corner area. The second insulation layer 12 is laid along the second side wall and includes several second insulation boxes 14 arranged sequentially along the length direction of the corner area. The dimensions of both the first insulation box 13 and the second insulation box 14 along the length direction of the corner area are both a first length L1.

[0028] Furthermore, in order to ensure that the insulation box has sufficient expansion and contraction space during the thermal expansion and contraction process, there is a first gap 15 between adjacent first insulation boxes 13 and a first gap 15 between adjacent second insulation boxes 14; at the corner of the corner area, a second gap 16 is provided between the opposite first insulation box 13 and second insulation box 14.

[0029] The secondary shielding layer 20 is located inside the secondary insulation layer and includes a first metal reinforcing plate 21 and a first corrugated corner plate 22 covering the first metal reinforcing plate 21. The two sides of the first metal reinforcing plate 21, corresponding to the two sides of the corner area, are respectively connected to the inner surfaces of the first insulation box 13 and the second insulation box 14, covering the second gap 16 while connecting the first insulation box 13 and the second insulation box 14 into a whole. At this time, with a first gap 15 existing between the first insulation boxes 13 and the second insulation box 14, a gap also exists between adjacent first metal reinforcing plates 21. Further, in this embodiment, the first metal reinforcing plate 21 is fixed to the first insulation box 13 and the second insulation box 14 by rivets 23.

[0030] Reference Figure 3As shown, the first corrugated corner plate 22 is a thin metal plate with a corrugated structure. Its shape is adapted to the bending shape of the first metal reinforcing plate 21 and covers the inner surface of the first metal reinforcing plate 21. The corrugations on the first corrugated corner plate 22 extend away from the corner area along the length direction perpendicular to the corner area, and there is a first corrugation spacing P1 between the corrugations on the first corrugated corner plate 22, so that the spacing between adjacent corrugations on the secondary shielding layer 20 is the first corrugation spacing P1. The first corrugated corner plate connects at least two adjacent first insulation boxes and two adjacent second insulation boxes. The first corrugated corner plate 22 is only welded and sealed to the first metal reinforcing plate 21 at its two edges along the length direction of the corner area, forming two welds parallel to the corrugation extension direction. The other positions of the first corrugated corner plate 22 are not fixed to the first metal reinforcing plate 21, so that the first corrugated corner plate 22 and the first metal reinforcing plate 21 in the middle area of ​​the two welds are in a movable abutment relationship. The two ends of the first corrugated corner plate 22 along the corrugation extension direction are used to fix the thin film layer in the planar area. When the same first metal reinforcing plate 21 connects the area between two first corrugated corner plates 22, a complete metal sealing layer is formed. When the ends of two adjacent first corrugated corner plates 22 are fixed to different first metal reinforcing plates 21, one side of one of the first corrugated corner plates 22 extends outward to cover the gap between the first metal reinforcing plates 21, forming a complete metal sealing layer. This "fixed on both sides, free in the middle" welding method allows the first corrugated corner plate 22 to freely expand and contract relative to the first metal reinforcing plate 21 in the direction perpendicular to its corrugation extension, effectively releasing thermal deformation during temperature changes. Since the first corrugated corner plate 22 connects at least two adjacent first insulation boxes 13 and two adjacent second insulation boxes 14, the contraction and expansion of the secondary insulation layer within the coverage area of ​​the first corrugated corner plate 22 are uniformly distributed on the entire first corrugated corner plate 22 after being uniformly borne by the first corrugated corner plate 22, balancing the force on all corrugations.

[0031] Reference Figure 1 and Figure 4 As shown, the main insulation layer is located inside the secondary shielding layer 20, and includes a first main insulation layer 31 and a second main insulation layer 32 connected to the two sides of the secondary shielding layer 20 respectively. The first main insulation layer 31 is laid inside the first corrugated corner plate 22 and the first metal reinforcing plate 21 along the first side direction of the corner area, and includes a plurality of first main insulation boxes 33 arranged sequentially along the length direction of the corner area. The second main insulation layer 32 is laid inside the first corrugated corner plate 22 and the first metal reinforcing plate 21 along the second side direction of the corner area, and includes a plurality of second main insulation boxes 34 arranged sequentially along the length direction of the corner area. The dimension of the first main insulation box 33 and the second main insulation box 34 along the length direction of the corner area is the second length L2.

[0032] Furthermore, in order to ensure that the insulation box has sufficient expansion and contraction space during thermal expansion and contraction, there is a third gap 35 between adjacent first main insulation boxes 33, and there is also a third gap 35 between adjacent second main insulation boxes 34; at the corner of the corner area, a fourth gap 36 is provided between the opposite first main insulation box 33 and second main insulation box 34.

[0033] Reference Figure 5 As shown, preferably, the first gap 15 between the first insulation boxes 13 and the third gap 35 between the first main insulation boxes 33 are staggered in the length direction of the corner area, that is, the position of the first gap 15 and the position of the third gap 35 are not at the same cross section, thereby avoiding the formation of a continuous through gap along the thickness direction, effectively improving the overall insulation effect and structural strength of the corner area.

[0034] Reference Figure 6 As shown, the main shielding layer 40 is located inside the main insulation layer, i.e., the side closest to the cryogenic liquid, and includes a second metal reinforcing plate 41 and a first main corrugated corner plate 42 covering the second metal reinforcing plate 41. The two sides of the second metal reinforcing plate 41 correspond to the two sides of the corner area, and respectively cover the inner surfaces of the first main insulation box 33 and the second main insulation box 34. The second metal reinforcing plate 41 is fixed to each of the first main insulation boxes 33 and the second main insulation box 34 at multiple points by rivets 23, covering the fourth gap 36 while connecting one of the first main insulation boxes 33 and the second main insulation box 34 into a whole. At this time, when there is a third gap 35 between the first main insulation boxes 33 and the second main insulation box 34, there is also a gap between two adjacent second metal reinforcing plates 41. Further, in this embodiment, the second metal reinforcing plate 41 is fixed to each of the first main insulation boxes 33 and the second main insulation box 34 at multiple points by rivets 23.

[0035] Reference Figure 7As shown, the first main corrugated corner plate 42 is a thin metal plate with a corrugated structure. Its shape is adapted to the bending shape of the second metal reinforcing plate 41 and covers the inner surface of the second metal reinforcing plate 41. The corrugations on the first main corrugated corner plate 42 extend away from the corner area in a direction perpendicular to the length of the corner area, and there is a second corrugation spacing P2 between the corrugations on the first main corrugated corner plate 42, so that the spacing between adjacent corrugations on the main shielding layer 40 is the second corrugation spacing P2. The first main corrugated corner plate 42 connects at least two adjacent first main insulation boxes 33 and two adjacent second main insulation boxes 34. The first main corrugated corner plate 42 is only welded and sealed to the second metal reinforcing plate 41 at its two edges along the length of the corner area, forming two welds parallel to the corrugation extension direction. The other positions of the first main corrugated corner plate 42 are not fixed to the second metal reinforcing plate 41, so that the first main corrugated corner plate 42 and the second metal reinforcing plate 41 in the middle area of ​​the two welds are in a movable abutment relationship. The second metal reinforcing plate 41 connects the area between the two first main corrugated corner plates 42. The two ends of the first main corrugated corner plates 42 along the corrugation extension direction are used to fix the thin film layer in the planar area, thereby forming a complete metal sealing layer. This "fixed on both sides, free in the middle" welding method allows the first main corrugated corner plates 42 to freely expand and contract relative to the second metal reinforcing plate 41 in the direction perpendicular to its corrugation extension, effectively releasing thermal deformation during temperature changes. Since the first main corrugated corner plates 42 connect at least two adjacent first main insulation boxes 33 and two adjacent second main insulation boxes 34, the contraction and expansion of the main insulation layer within the coverage area of ​​the first main corrugated corner plates 42 are uniformly distributed across the entire first main corrugated corner plates 42 after being uniformly borne by the first main corrugated corner plates 42, balancing the force on all corrugations.

[0036] Of the first corrugated corner plate 22 and the first main corrugated corner plate 42, at least one must satisfy the requirement that it has multiple corrugations. When there are multiple corrugations, the stress uniformly borne by the corrugated corner plate can be distributed among multiple corrugations, which greatly reduces the stress borne by each corrugation, avoids stress concentration, improves the uniformity of the overall expansion and contraction deformation of the corrugated corner plate, and at the same time reduces the requirements for the forming and assembly precision of the plate.

[0037] In this embodiment, since the main shielding layer 40 is in direct contact with the cryogenic liquid, and the secondary shielding layer 20 is further insulated from the cryogenic liquid by a main insulation layer, the deformation of the secondary shielding layer 20 is less than that of the main shielding layer 40. Therefore, the first wave spacing P1 of the secondary shielding layer 20 is set to be greater than the second wave spacing P2 of the main shielding layer 40, reducing the processing workload of the secondary shielding layer 20 and improving the construction efficiency of the membrane enclosure system. Preferably, the ratio of the first wave spacing P1 to the second wave spacing P2 is 3:2.

[0038] Preferably, in this embodiment, both the first length L1 and the second length L2 are not less than the second wave pitch P2 to ensure the integrity of the main shielding layer 40 and the secondary shielding layer 20 and improve the structural strength of the corner area. In a preferred embodiment, the first length L1 is equal to the first wave pitch P1. In this case, each first corrugated corner plate 22 has one corrugation, meaning each first corrugated corner plate 22 corresponds to one complete corrugation. Simultaneously, the first corrugated corner plate 22 corresponds precisely to the splicing seam of the first insulation box 13. The two sides of the first corrugated corner plate 22 connect to the first metal reinforcing plates 21 on two adjacent first insulation boxes 13 and two adjacent second insulation boxes 14. The first corrugated corner plate 22 seals the gap between the two first metal reinforcing plates 21, i.e., the first gap 15 in this embodiment. Further, the second length L2 can be equal to the first length L1, meaning all insulation boxes use a uniform specification, facilitating manufacturing and installation.

[0039] In this embodiment, the ratio of the second wave spacing P2 to the second length L2 is 2:3. The first main corrugated corner plate 42 has three corrugations, spanning three first main insulation boxes 33 and three second main insulation boxes 34. Both sides of the first main corrugated corner plate 42 extend beyond the corrugations to form a flat plate area welded and fixed to the second metal reinforcing plate 41. The corrugations on the first main corrugated corner plate 42 are all located in the middle of the welded and fixed position, meaning the middle area of ​​the flat plate area on both sides is separated from the second metal reinforcing plate 41, allowing the multiple corrugations on the first main corrugated corner plate 42 to freely and uniformly expand and contract without restriction.

[0040] Two first main corrugated corner plates 42 may be connected to two second metal reinforcing plates 41, resulting in a third gap 35 in the middle. In this case, the gap 35 can be covered by extending the side of the first main corrugated corner plate 42 closest to it. At this time, only the two edges of the first main corrugated corner plate 42 are welded to the second metal reinforcing plate 41, while the middle area freely abuts against the second metal reinforcing plate 41. Similarly, if a first gap 15 exists between two adjacent first corrugated corner plates 22, the first gap 15 can be covered by extending the side of the nearest first corrugated corner plate 22. This covering method avoids direct exposure of the shielding layer at the gap, ensuring that cryogenic liquids do not seep into the insulation layer along the gap, thus improving sealing reliability.

[0041] The first insulation box 13, the second insulation box 14, the first main insulation box 33, and the second main insulation box 34 all adopt the same sandwich structure, including a lower plywood 17, an insulation block 18, and an upper plywood 19. The insulation block 18 is sandwiched between the lower plywood 17 and the upper plywood 19 and can be made of polyurethane foam, glass fiber reinforced polyurethane foam, or other high-efficiency insulation materials suitable for low-temperature environments. The lower plywood 17 and the upper plywood 19 provide structural support and installation foundation for the insulation boxes. The first metal reinforcing plate 21 and the second metal reinforcing plate 41 are fixed to the upper plywood 19 by rivets 23. The upper plywood 19 has several mounting holes 37 for accommodating the rivets 23. Preferably, the diameter of the mounting holes 37 is larger than the diameter of the rivets 23. This oversized design provides a certain radial displacement margin for the insulation box and the metal reinforcing plate during low-temperature thermal shrinkage, avoiding the compressive stress caused by the difference in thermal shrinkage between the metal reinforcing plate and the insulation box, and improving the durability of the structure.

[0042] In the corner structure of the present invention, the first insulation box 13 and the second insulation box 14 are fixed to the first metal reinforcing plate 21 at the time of manufacture, and the first main insulation box 33 and the second main insulation box 34 are fixed to the second metal reinforcing plate 41. During assembly, they are installed in sequence from the outside to the inside: first, the first insulation box 13 and the second insulation box 14, which are connected by the first metal reinforcing plate 21, are laid sequentially on the inner wall of the hull in the corner area; then, the first corrugated corner plate 22 is covered on the first metal reinforcing plate 21 and fixed by welding only on both sides; then, the first main insulation box 33 and the second main insulation box 34, which are connected by the second metal reinforcing plate 41, are installed sequentially; finally, the first main corrugated corner plate 42 is covered on the second metal reinforcing plate 41 and fixed by welding only on both sides.

[0043] When the membrane enclosure system undergoes temperature cycles from room temperature to low temperature or from low temperature to room temperature, the corrugated corner plates on the main shielding layer 40 and the secondary shielding layer 20, which are fixed only on both sides, can freely expand and contract perpendicular to the corrugation extension direction, effectively absorbing thermal deformation. Since the corrugated corner plates span multiple insulation boxes, they integrate the dispersed expansion and contraction differences of the insulation layers, ensuring that deformation is evenly distributed across the multiple corrugations on the entire corrugated corner plate. Through the natural transition between the corrugations in the corner area and the planar area, and the reasonable inter-layer corrugation spacing ratio design, the corner area achieves good deformation adaptability and structural reliability under temperature cycling conditions.

[0044] Furthermore, although the above embodiments are described using an LNG membrane enclosure system as an example, the corner structure of the present invention is also applicable to other membrane enclosure systems that require the storage and transportation of cryogenic liquids, such as enclosure systems for cryogenic liquids like liquid hydrogen, liquid oxygen, and liquid nitrogen.

[0045] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. The corner structure of a membrane enclosure system, characterized in that, Including those set sequentially from the outside in: The secondary insulation layer includes a first insulation layer and a second insulation layer respectively disposed on two sides of the corner area. The first insulation layer includes a plurality of first insulation boxes disposed along the length direction of the corner area. The second insulation layer includes a plurality of second insulation boxes disposed along the length direction of the corner area. The length of the first insulation box and the second insulation box is a first length. The secondary shielding layer includes a first metal reinforcing plate corresponding to the first insulation box and the second insulation box. The first metal reinforcing plate is used to connect the first insulation box and the second insulation box. The first metal reinforcing plate is covered with a first corrugated corner plate. The corrugations on the secondary shielding layer have a first wave spacing. The first corrugated corner plate is welded and fixed to the first metal reinforcing plate only on both sides. The first corrugated corner plate connects at least two adjacent first insulation boxes and two adjacent second insulation boxes. The main insulation layer includes a first main insulation layer and a second main insulation layer respectively connected to the two sides of the secondary shielding layer. The first main insulation layer includes a plurality of first main insulation boxes arranged along the length direction of the corner area. The second main insulation layer includes a plurality of second main insulation boxes arranged along the length direction of the corner area. The length of the first main insulation box and the second main insulation box is a second length. The main shielding layer includes a second metal reinforcing plate corresponding to the first main insulation box and the second main insulation box. The second metal reinforcing plate is used to connect the first main insulation box and the second main insulation box. The second metal reinforcing plate is covered with a first main corrugated corner plate. The corrugations on the main shielding layer have a second wave pitch. The first main corrugated corner plate is fixedly connected to the second metal reinforcing plate only on both sides. The first main corrugated corner plate connects at least two adjacent first main insulation boxes and two adjacent second main insulation boxes. The first corrugated corner plate and / or the first main corrugated corner plate are provided with multiple corrugations.

2. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, The first wave spacing is greater than the second wave spacing.

3. The corner structure of the membrane enclosure system as described in claim 2, characterized in that, The ratio of the first wave spacing to the second wave spacing is 3:

2.

4. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, The first length and the second length are not less than the second wave spacing.

5. The corner structure of the membrane enclosure system as described in claim 4, characterized in that, The first length is equal to the first wave spacing, and the first corrugated corner plate is set at the splice seam of the first insulation box.

6. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, The second length is equal to the first length.

7. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, The ratio of the second wave spacing to the second length is 2:

3. The first main corrugated corner plate is provided with three corrugations. The first main corrugated corner plate is welded and fixed to the second metal reinforcing plate only on both sides. The area of ​​the first main corrugated corner plate located in the middle of the welded and fixed position is in movable contact with the second metal reinforcing plate.

8. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, There is a first gap between adjacent first insulation boxes and adjacent second insulation boxes, a second gap between opposite first insulation boxes and second insulation boxes, a third gap between adjacent first main insulation boxes and adjacent second main insulation boxes, and a fourth gap between opposite first main insulation boxes and second main insulation boxes.

9. The corner structure of the membrane enclosure system as described in claim 8, characterized in that, The first gap and the third gap are misaligned.

10. The corner structure of the membrane enclosure system as described in claim 8, characterized in that, The third gap between the two first main corrugated corner plates is covered by the side extension of the nearest first main corrugated corner plate, and the first gap between the first corrugated corner plates is covered by the side extension of the nearest first corrugated corner plate.

11. The corner structure of the membrane enclosure system as described in claim 1, characterized in that, The first metal reinforcing plate and the second metal reinforcing plate are respectively fixed to the first insulation box, the second insulation box, the first main insulation box, and the second main insulation box by rivets.

12. The corner structure of the membrane enclosure system as described in claim 11, characterized in that, The first insulation box, the second insulation box, the first main insulation box, and the second main insulation box all include a lower plywood, an insulation block, and an upper plywood. The upper plywood is provided with mounting holes for accommodating the rivets, and the diameter of the mounting holes is larger than the diameter of the rivets.

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