Arrangement method of right-angle area of thin film enclosure system and thin film enclosure system

Abstract

The application discloses a right-angle region arrangement method of a thin film enclosure system and the thin film enclosure system. The thin film enclosure system is arranged on the inner wall of a storage bin and comprises a thin film layer and a corner piece fixed at the connecting position of adjacent walls. The arrangement method comprises the following steps: taking the distance between the last corrugation of the main shielding layer and the orthogonal sidewall of the main shielding block as the limit, calculating the maximum number of the first wave interval that can be arranged between two right-angle regions, and forming the main shielding layer by overlapping the first corrugated plate; calculating the effective arrangement size; if the effective arrangement size can be divided by the second wave interval, forming the secondary shielding layer by overlapping the second corrugated plate, and aligning the last corrugation of the secondary shielding layer with the corresponding corrugation of the main shielding layer in the vertical direction; if there is a remainder, forming the secondary shielding layer by overlapping the second corrugated plate and the third corrugated plate, and keeping the alignment relationship. The application has strong universality, is suitable for different storage bin sizes, is reasonable in stress, and is flexible in arrangement mode.

Description

Technical Field

[0001] This invention relates to the field of liquefied gas storage and transportation equipment technology, specifically to a method for arranging right-angled areas in a membrane enclosure system and the membrane enclosure system itself. Background Technology

[0002] With the continued growth in demand for large-scale maritime transportation of liquefied gases such as liquefied natural gas (LNG), the safety and reliability of membrane containment systems for liquid cargo ships, as a core loading structure, have attracted much attention. Membrane containment systems are typically composed of multi-layered composite structures, including a primary shielding layer that is in direct contact with the liquid cargo, a primary insulation layer for core heat insulation, a secondary shielding layer that provides auxiliary sealing, and a secondary insulation layer that provides auxiliary heat insulation. These layers work together to achieve effective sealing and insulation of cryogenic liquid cargo.

[0003] In early membrane enclosure system designs, given that the primary shielding layer was in direct contact with the liquid cargo and needed to withstand significant temperature changes and thermal expansion and contraction, it was designed as a corrugated plate structure with a specific geometric shape. The deformation capacity of the corrugations absorbed thermal stress, ensuring the sealing integrity of the membrane. The secondary shielding layer, not being in direct contact with the liquid cargo, was typically designed in earlier times as a simpler flat plate or composite plate structure.

[0004] However, with the deepening of engineering practice and the continuous improvement of the performance requirements of the enclosure system, research has found that the secondary shielding layer also experiences expansion and contraction deformation due to factors such as temperature changes and liquid sloshing during use. If the secondary shielding layer cannot effectively release such deformation, it will lead to uneven stress concentration inside the structure, which in turn will cause fatigue damage and even sealing failure of the secondary shielding layer, seriously affecting the overall safety and reliability of the enclosure system. In view of this, a new type of thin-film enclosure system in which both the primary and secondary shielding layers adopt a corrugated plate structure has emerged, enabling both shielding layers to have good deformation coordination capabilities.

[0005] However, simultaneously designing both the primary and secondary shielding layers as corrugated plate structures introduces new design challenges. The primary shielding layer has a specific first wave spacing, while the secondary shielding layer has a specific second wave spacing. These two layers are arranged in a superimposed configuration within the ship's hull, and their positional relationship directly affects the stress state of each structural layer. If the positions of the primary and secondary shielding layers lack effective constraints and unified planning, then for different ship types and hull design dimensions, it is often necessary to perform corrugation layout calculations and designs individually for each specific engineering case. This significantly increases the design workload and makes it difficult to develop universal and standardized design solutions, hindering mass production and widespread application of the product.

[0006] Therefore, how to rationally plan the positional relationship between the corrugations of the main shielding layer and the secondary shielding layer while meeting the constraints of the ship's design dimensions, so that the corrugations of each layer are subjected to reasonable stress, and at the same time take into account design convenience and product versatility, has become a technical problem that urgently needs to be solved in the field of membrane enclosure systems. Summary of the Invention

[0007] The technical problem to be solved by this invention is that in existing membrane enclosure systems, the different wave spacing between the main shielding layer and the secondary shielding layer leads to a lack of effective constraints and unified planning for the corrugation arrangement, insufficient design versatility, and poor stress state.

[0008] To address the aforementioned technical problems, this invention provides a method for arranging right-angled areas in a membrane enclosure system. The membrane enclosure system is installed on the inner wall of the storage silo and includes a membrane layer installed on the wall surface of the storage silo. The membrane layer includes a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer arranged sequentially inward along the wall surface of the storage silo. It also includes corner pieces fixed at the connection between adjacent walls of the storage silo. The corner pieces include secondary insulation blocks, secondary shielding blocks, primary insulation blocks, and primary shielding blocks corresponding to the membrane layer. Includes the following steps: S10: In the right-angled area of ​​the storage chamber, with the distance between the last corrugation of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block not greater than the first corrugation spacing, the maximum number of first corrugation spacings that can be arranged between two opposite right-angled areas is calculated according to the design dimensions of the storage chamber, so that the main shielding layer is set to be formed entirely by overlapping first corrugated plates with the first corrugation spacing, and the main insulation layer corresponds to the splicing of the main shielding layer and the main insulation block; S20: Based on the number of the first wave spacing set in S10, calculate the size between the two farthest waves on the main shielding layer as the effective arrangement size; S30: Calculate whether there is a remainder when the effective arrangement size is divided by the second corrugated pitch. If there is, proceed to step S40; if not, set the secondary shielding layer to be formed entirely by overlapping second corrugated plates with the second corrugated pitch, and align the last corrugation on the second corrugated plate near the right angle region with the last corrugation on the first corrugated plate near the right angle region in a direction perpendicular to the main shielding layer. The secondary insulation layer is spliced ​​with the secondary shielding layer and the secondary insulation block to complete the arrangement of the thin film layer. S40: Within the effective arrangement size, with the maximum number of the second corrugated plates as a constraint, the remaining size difference is compensated by using corrugations with compensating corrugations, so that the secondary shielding layer is set as a mixed overlapping layer including the second corrugated plate and the third corrugated plate with the filling corrugations. At the same time, the last corrugation on the secondary shielding layer near the right angle area is aligned with the last corrugation on the first corrugated plate near the right angle area in a direction perpendicular to the main shielding layer. The secondary insulation layer is spliced ​​with the secondary shielding layer and the secondary insulation block to complete the arrangement of the thin film layer.

[0009] Furthermore, the distance between the last ripple of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block is between half of the first wave spacing and the first wave spacing.

[0010] Furthermore, the distance between the last ripple of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block is the first wave spacing. At this time, if the number of first wave spacings that can be set between two opposite right-angled areas is not an integer, the size of the storage compartment is adjusted until the number is an integer.

[0011] Furthermore, the first wave spacing is smaller than the second wave spacing, and the distance between the last wave of the secondary shielding layer and the orthogonal sidewall of the secondary shielding block is not greater than the second wave spacing.

[0012] Furthermore, the second wave spacing is 1.5 times the first wave spacing.

[0013] Furthermore, the compensation wave spacing is greater than the first wave spacing and less than the second wave spacing.

[0014] Furthermore, in step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate continuously overlaps along one of the right-angled areas to the other right-angled area, and the third corrugated plate makes up for the size difference at one end.

[0015] Furthermore, in step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate continuously overlaps towards the middle along the two right-angled areas, and the third corrugated plate fills in the dimensional difference in the middle.

[0016] Furthermore, in step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate is continuously spliced ​​along the middle towards the two right-angled areas, and the third corrugated plate makes up for the size difference at both ends.

[0017] Furthermore, in step S40, when the secondary shielding layer is a mixed overlapping layer, the third corrugated plate overlaps between the second corrugated plates at intervals.

[0018] Furthermore, in step S40, when the secondary shielding layer is a hybrid overlapping layer, the compensation wave spacing is equal to the first wave spacing.

[0019] Furthermore, in step S40, when the secondary shielding layer is a hybrid overlapping layer, at least one of the calculated number of the second wave spacing and the number of the compensation wave spacing is an even number.

[0020] The present invention also provides a membrane enclosure system, disposed on the inner wall of a storage silo, comprising: A corner bend is provided at the connection of adjacent walls of the storage chamber via a connector. The corner bend includes a secondary insulation block, a secondary shielding block, a primary insulation block, and a primary shielding block arranged sequentially along the wall of the storage chamber. A thin film layer is fixed to each wall of the storage chamber via the connector. The thin film layer includes a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer arranged sequentially along the wall of the storage chamber. The secondary insulation layer and the primary insulation layer are respectively connected to the secondary insulation block and the primary insulation block. The secondary shielding layer and the primary shielding layer are respectively overlapped and fixed to the secondary shielding block and the primary shielding block. Corresponding to the right-angle area of ​​the storage chamber, the primary shielding layer is formed by overlapping and splicing a first corrugated plate with a first wave pitch. The distance between the last corrugation of the primary shielding layer near the corner member and the orthogonal sidewall of the primary shielding block is not greater than the first wave pitch. The secondary shielding layer is formed by overlapping and splicing a second corrugated plate with a second wave pitch or by overlapping and splicing a second corrugated plate and a third corrugated plate with a compensating spacing. The last corrugation of the secondary shielding layer near the corner member is aligned with the last corrugation of the primary shielding layer near the corner member in a direction perpendicular to the thin film layer.

[0021] Furthermore, the distance between the last ripple on the secondary shielding layer near the corner piece and the orthogonal sidewall of the secondary shielding block is no greater than the second wave spacing.

[0022] Furthermore, the third corrugated plate is located at one end of the secondary shielding layer near one of the right-angled regions.

[0023] Furthermore, the third corrugated plate is located at both ends of the secondary shielding layer near the right-angle region.

[0024] Furthermore, the third corrugated plate is located in the middle of the secondary shielding layer.

[0025] Furthermore, the third corrugated plate and the second corrugated plate are spaced apart on the secondary shielding layer.

[0026] Furthermore, the second and third corrugated plates are symmetrically arranged along the centerline of the secondary shielding layer.

[0027] The beneficial effects of this invention are: High versatility: This layout method can automatically adapt to the design dimensions of different storage silos without the need for individual customization. Furthermore, the corrugation positions of each layer are determined, which greatly improves the design versatility and mass production efficiency of the product.

[0028] Reasonable stress distribution: Regardless of whether the secondary shielding layer adopts a full second corrugated plate or a combination of the second and first corrugated plates, it ensures that the last corrugation near the right angle area on the secondary shielding layer is aligned vertically with the last main corrugation near the right angle area on the main shielding layer. This avoids excessive distance between the last corrugation of the secondary shielding layer and the corner area, as well as local stress concentration caused by corrugation misalignment, thus improving the stress state of the structure.

[0029] Flexible layout: There are multiple ways to combine the second and third corrugated plates, and the optimal solution can be selected flexibly according to the actual project needs. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the storage structure of the present invention; Figure 2 This is a flowchart of the arrangement method of the present invention; Figure 3 This is a schematic diagram of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of Embodiment 2 of the present invention; Figure 5 This is a top view of Embodiment 2 of the present invention (the blank area is a ripple set with the second wave spacing); Figure 6 This is a schematic diagram of Embodiment 3 of the present invention; Figure 7 This is a top view of Embodiment 3 of the present invention (the blank area represents the ripples set with the second wave spacing); Figure 8 This is a schematic diagram of Embodiment 4 of the present invention; Figure 9 This is a top view of Embodiment 4 of the present invention (the blank area represents the ripples set with the second wave spacing); Figure 10 This is a schematic diagram of Embodiment 5 of the present invention; Figure 11 , Figure 12 , Figure 13 This is a top view of Embodiment 5 of the present invention (the blank area is a ripple set with the second wave spacing).

[0031] Explanation of the numbers in the diagram: 100, storage warehouse; 110, first wall; 120, second wall; 130, connecting wall; 140, right-angle area; 200. Corner component; 210. Secondary insulation block; 220. Secondary shielding block; 230. Primary insulation block; 240. Primary shielding block; 300. Thin film layer; 310. Secondary insulation layer; 320. Secondary shielding layer; 321. Secondary corrugated plate; 322. Third corrugated plate; 330. Primary insulation layer; 340. Primary shielding layer; 341. First corrugated plate; P1, first wave spacing; P2, second wave spacing; P3, compensation wave spacing; L, effective arrangement size. Detailed Implementation

[0032] 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. The gaps in the figures are exaggerated and are for illustration only.

[0033] Reference Figure 1 As shown, the membrane enclosure system is arranged on the inner wall of the storage silo 100. The membrane enclosure system includes a membrane layer 300 fixedly installed on the wall of the storage silo 100 by connectors. The membrane layer 300 includes a secondary insulation layer 310, a secondary shielding layer 320, a primary insulation layer 330 and a primary shielding layer 340 arranged sequentially along the wall of the storage silo 100 into the interior of the storage silo 100. It also includes corner pieces 200 fixed at the connection between adjacent walls of the storage silo 100 by connectors. The corner pieces 200 include corresponding secondary insulation blocks 210, secondary shielding blocks 220, primary insulation blocks 230 and primary shielding blocks 240, which are used to connect the membrane layers 300 on two adjacent walls and provide corner sealing.

[0034] The storage silo 100 has a polygonal prism structure; in this embodiment, an octagonal prism with a decahedron shape is used as an example. The two ends of the polygonal prism structure are parallel polygonal walls 110 and 120. Connecting walls 130 connect the first wall 110 and the second wall 120 along the sides of the polygons, and the connecting walls 130 are perpendicular to the first wall 110 and the second wall 120. When the first wall 110 and the second wall 120 are vertically aligned, the angled region between the connecting wall 130 in the horizontal and vertical directions and the first wall 110 and the second wall 120 is a right-angled region 140.

[0035] Reference Figure 2 As shown, the arrangement method of the right-angled zone 140 of the membrane enclosure system of the present invention includes the following steps: Step S10: Arrange the main shielding layer 340.

[0036] In the right-angled area 140 of the storage 100, with the distance d between the last corrugation of the main shielding layer 340 near the corner piece 200 and the vertical surface of the main shielding block 240 not exceeding the first wave pitch P1, the maximum value of the first wave pitch P1 that can be arranged between the two opposite right-angled areas 140 is calculated according to the design dimensions of the storage 100, so that the main shielding layer 340 is set to be entirely composed of first corrugated plates 341 with the first wave pitch P1 overlapped together, wherein the wave pitch of the first corrugated plates 341 in two mutually perpendicular directions is the first wave pitch P1, and the main insulation layer 330 is connected to the main shielding and the main insulation block 230.

[0037] Specifically, the corner piece 200 is attached to the inner wall of the storage 100 through adhesive layers and other connectors. During installation, the edge of the main shielding layer 340 overlaps and is fixed with one side of the main shielding block 240. Therefore, the spacing between the two right-angled areas 140 that can be set with corrugations is the design size of the storage 100 minus the distance between the orthogonal side of the main shielding block 240 and the inner wall of the storage 100. Let this size be W. Then, the maximum value n of the number of corrugations that can be arranged in this direction satisfies: n×P1≤W. At this time, the distance d between the last corrugation and the orthogonal side of the main shielding block 240 is 1 / 2(Wn×P1), and d≤P1, avoiding the formation of an excessively large non-corrugated area and ensuring the continuity of the deformation capability of the main shielding layer 340. Preferably, the distance d between the last corrugation of the main shielding layer 340 near the corner piece 200 and the orthogonal side of the main shielding block 240 is between half the first corrugation spacing P1 and the first corrugation spacing P1, i.e., 1 / 2P1≤d≤P1. This ensures that the edge of the main shielding layer 340 has sufficient space for installation and connection with the main shielding block 240, avoiding construction interference due to insufficient spacing.

[0038] More preferably, the distance between the last corrugation of the main shielding layer 340 near the corner piece 200 and the orthogonal side of the main shielding block 240 is exactly equal to the first corrugation pitch P1, i.e., d=P1. At this time, the size of this area is standardized to a complete first corrugation pitch P1, which facilitates the unified design and mass production of the connection node between the corner piece 200 and the first corrugated plate 341.

[0039] Step S20: Calculate the effective layout dimension L Based on the number n of the first wave spacing P1 set in step S10, the dimension between the two furthest corrugations on the main shielding layer 340 is calculated as the effective arrangement dimension L, i.e., L = n × P1. This is because the corrugations at both ends of the corresponding secondary shielding layer 320 need to be aligned with the corrugations at both ends of the main shielding layer 340. That is, the corrugation arrangement range of the secondary shielding layer 320 corresponds to the distance between the two furthest main corrugations of the main shielding layer 340, so this distance is taken as the effective arrangement dimension L. Among them, the two furthest corrugations refer to the last corrugations located at both ends of the secondary shielding layer 320, respectively close to the two right-angled areas 140 corner pieces 200.

[0040] Step S30: Determination of the arrangement of the secondary shielding layer 320 Because the corrugations at both ends of the secondary shielding layer 320 need to be aligned with the last corrugation of the two right-angled regions 140 of the primary shielding layer 340 in a direction perpendicular to the primary shielding layer 340, the corrugation spacing on the secondary shielding layer 320 is preset to the second corrugation spacing P2. Therefore, it is necessary to calculate how many second corrugation spacings P2 can be divided within the distance between the two corrugations at both ends of the primary shielding layer 340. When the second corrugation spacing P2 is equal to the first corrugation spacing P1, the corrugations of the secondary shielding layer 320 will necessarily correspond one-to-one with the corrugations of the primary shielding layer 340. Furthermore, since the primary shielding layer 340 is in direct contact with the liquid cargo, and there is also a primary insulation layer 330 between the secondary shielding layer 320 and the liquid cargo, the expansion and contraction of the primary shielding layer 340 is more drastic than that of the secondary shielding layer 320. Therefore, the first corrugation spacing P1 is set to be smaller than the second corrugation spacing P2. Therefore, it is necessary to further calculate how many second corrugation spacings P2 can be set within the effective arrangement size L, that is, to determine whether there is a remainder of n×P1 / P2.

[0041] If there is no remainder, meaning the effective arrangement size L is divisible by P2, it indicates that within this size range, several corrugations with a second wave pitch P2 can be arranged on the secondary shielding layer 320, ensuring that the two end corrugations can be aligned with the two end corrugations of the main shielding layer 340. In this case, the secondary shielding layer 320 can be configured entirely by overlapping second corrugated plates 321 with a second wave pitch P2, and the number of second wave pitches P2 on the secondary shielding layer 320 is m = n × P1 / P2. At this point, the last corrugation of the secondary shielding layer 320 near the right-angle regions 140 on both sides aligns with the last main corrugation of the main shielding layer 340 in a direction perpendicular to the main shielding layer 340. The main and secondary shielding layers 320 achieve precise alignment at the right-angle regions 140, resulting in optimal stress distribution. The secondary insulation layer 310 then connects with the secondary shielding layer 320 and the secondary insulation block 210, completing the arrangement of the thin film layer 300.

[0042] If the effective arrangement size L divided by the second wave pitch P2 has a remainder, it means that if all the corrugations on the secondary shielding layer 320 are arranged with the second wave pitch P2, it is impossible to achieve the requirement that the corrugations at both ends of the secondary shielding layer 320 are aligned with the corrugations at both ends of the primary shielding layer 340. Therefore, in this case, the method in step S40 is used to make the corrugation arrangement of the secondary shielding layer 320 meet the alignment requirements.

[0043] Step S40: The secondary shielding layer 320 is arranged in a mixed overlapping manner.

[0044] Within the effective arrangement size L, with the maximum number of second corrugated plates P2 as a constraint, the remaining size difference is compensated by using corrugations with compensating corrugations P3. This makes the secondary shielding layer 320 a hybrid overlapping layer including the second corrugated plate 321 and the third corrugated plate 322 with compensating corrugations P3. This ensures that the last corrugation on the secondary shielding layer 320 near the right angle region 140 is aligned with the last corrugation on the main shielding layer 340 near the corresponding right angle region 140 in a direction perpendicular to the main shielding layer 340. The secondary insulation layer 310 is connected to the secondary shielding layer 320 and the secondary insulation block 210 to complete the arrangement of the thin film layer 300.

[0045] The second corrugated plate 321 has corrugations with a wave pitch of the second wave pitch P2 in both mutually perpendicular directions. The wave pitch of the third corrugated plate 322 in both directions is determined according to the compensation of the secondary shielding layer 320 in both mutually perpendicular directions. For example, if compensation is required in the first direction but not in the second direction perpendicular to the first direction, the wave pitch of the third corrugated plate 322 in the first direction is the compensation wave pitch P3, while the wave pitch in the second direction remains the second wave pitch P2. If the number of compensation wave pitches P3 required in the first and second directions is different, some third corrugated plates 322 can have a wave pitch of the compensation wave pitch P3 in both the first and second directions, while other third corrugated plates 322 can only have a wave pitch of the compensation wave pitch P3 in the direction where compensation is still required, while the wave pitch in the direction where compensation is no longer required remains the second wave pitch P2. Alternatively, third corrugated plates 322 can be set with a compensation wave pitch P3 in the first direction and a second wave pitch P2 in the second direction, and third corrugated plates 322 with a second wave pitch P2 in the first direction and a compensation wave pitch P3 in the second direction, respectively. That is, the compensation for the dimensional difference in the two directions is performed independently. The phrase "setting the number of second corrugated plates P2 to the maximum value" means that, within the effective arrangement size L, as many second corrugated plates 321 with the second corrugated plate P2 as possible are arranged, i.e., the number m of the second corrugated plates P2 is taken as the largest positive integer satisfying m×P2≤L. The remaining size difference Δ=Lm×P2 is filled by third corrugated plates 322 with compensating corrugated plates P3. Of course, when the size difference is not an integer multiple of the compensating corrugated plate P3, m needs to be adjusted so that the size difference is an integer multiple of the compensating corrugated plate P3 while m is the largest positive integer.

[0046] Furthermore, to avoid excessively large corrugation spacing and stress concentration, and to ensure the continuity of the deformation capability of the secondary shielding layer 320, the compensation corrugation spacing P3 is smaller than the second corrugation spacing P2, and preferably equal to the first corrugation spacing P1, thereby reducing the processing complexity of the corrugated plate.

[0047] Reference Figure 3 The diagram shown is a schematic diagram of Embodiment 1 of the present invention. In this embodiment, the distance W between the opposing surfaces of the main shielding blocks 240 of the two corner pieces 200 is exactly an integer multiple of the first wave pitch P1. The distance d between the last main corrugation of the main shielding layer 340 and the orthogonal side of the main shielding block 240 of the corner piece 200 is set as the first wave pitch P1. The main shielding layer 340 is entirely composed of first corrugated plates 341 with the first wave pitch P1 overlapping and splicing.

[0048] In this embodiment, the first wave spacing P1 is smaller than the second wave spacing P2. The distance between the two farthest main corrugations of the main shielding layer 340 is an integer multiple of the second wave spacing P2. The secondary shielding layer 320 is configured to be entirely composed of overlapping second corrugated plates 321 with the second wave spacing P2, without needing to adjust the corrugation spacing of the secondary shielding layer 320. Of course, in this embodiment, the first wave spacing P1 can also be equal to the second wave spacing P2. Further, since the secondary shielding layer 320 is connected to one side of the secondary shielding block 220, the distance between the last corrugation of the secondary shielding layer 320 near the corner piece 200 and the corner piece 200 is the vertical distance D between the last corrugation of the secondary shielding layer 320 and the orthogonal side of the secondary shielding block 220. In this embodiment, this distance D is greater than the first wave spacing P1 by the thickness of the main shielding block 240 plus the thickness of the main insulation block 230. Specifically, this distance is set not to be greater than the second wave spacing P2 to avoid forming an excessively large uncorrugated area in the secondary shielding layer 320.

[0049] Reference Figure 4 and Figure 5 The diagram shown is a schematic diagram of Embodiment 2 of the present invention. In this embodiment, after setting the maximum number of first wave spacing P1, the remaining size between the opposing surfaces of the two main shielding blocks 240 is such that the distance d between the last main wave of the main shielding layer 340 and the orthogonal side of the main shielding block 240 of the corner piece 200 is less than 1 / 2 of the first wave spacing P1.

[0050] In this embodiment, the first wave spacing P1 is smaller than the second wave spacing P2. Specifically, the second wave spacing P2 can be set to 1.5 times the first wave spacing P1. Since the effective arrangement size L divided by the second wave spacing P2 leaves a remainder, the secondary shielding layer 320 needs to be set as a mixed overlapping layer. Specifically, when filling is required in one direction, the second corrugated plate 321 is first continuously overlapped along one right-angle region 140 to the other right-angle region 140 until the maximum number of calculated second wave spacing P2 is reached. At this time, the size difference between the last corrugation on the second corrugated plate 321 and the last corrugation on the main shielding layer 340 is filled by the third corrugated plate 322.

[0051] Specifically, the secondary shielding layer 320 begins at the right-angled region 140 and continuously combines multiple second corrugated plates 321 in an overlapping manner, with the rightmost first corrugation aligned with the rightmost first corrugation of the main shielding layer 340 in a direction perpendicular to the main shielding layer 340. Once the number of second corrugation pitches P2 reaches the calculated value, the remaining dimensional difference is compensated by several third corrugated plates 322 with compensating corrugation pitches P3, until the left-angled region 140 is covered. At this point, the corrugations of the third corrugated plate 322 closest to the corner piece 200 at the compensation end are also aligned with the corrugations of the main shielding layer 340 closest to the corner piece 200 in a direction perpendicular to the main shielding layer 340.

[0052] Reference Figure 6 and Figure 7 The diagram shown is a schematic diagram of Embodiment 3 of the present invention. Since the main shielding layer 340 needs to be overlapped and fixed with the main shielding block 240 of the corner piece 200, to avoid the distance between the last corrugation of the main shielding layer 340 and the wall surface of the main shielding block 240 of the corner piece 200 being too small and inconvenient to operate, this embodiment, after calculating the maximum number n of the first wave spacing P1 that the main shielding layer 340 can be set with, sets the effective arrangement size L to (n-1)×P1, ensuring that the distance d between the last main corrugation of the main shielding layer 340 and the orthogonal side surface of the main shielding block 240 of the corner piece 200 is between half the first wave spacing P1 and the first wave spacing P1.

[0053] When the secondary shielding layer 320 needs to be set as a mixed overlapping layer, the second corrugated plate 321 continuously overlaps towards the middle along the two right-angled areas 140, and the third corrugated plate 322 fills in the dimensional difference in the middle. In order to avoid stress concentration caused by excessive corrugation spacing, in this embodiment, the compensation corrugation spacing P3 is set to be greater than the first corrugation spacing P1 and less than the second corrugation spacing P2.

[0054] Specifically, the secondary shielding layer 320 begins from the right-angled regions 140 on both sides, continuously overlapping the second corrugated plates 321 towards the center, with the rightmost corrugation aligned with the rightmost corrugation of the main shielding layer 340 in a direction perpendicular to the main shielding layer 340, and the leftmost corrugation aligned with the leftmost corrugation of the main shielding layer 340 in a direction perpendicular to the main shielding layer 340. This continues until the number of second wave pitches P2 on the second corrugated plates 321 on both sides reaches the calculated value. The remaining dimensional difference in the middle is then compensated by several third corrugated plates 322 with compensating wave pitches P3.

[0055] Reference Figure 8 and Figure 9The diagram shown is a schematic representation of Embodiment 4 of the present invention. The main shielding layer 340 is entirely composed of overlapping first corrugated plates 341 with a first wave pitch P1, and the secondary shielding layer 320 is a mixed overlapping layer. At this time, the second corrugated plates 321 are continuously overlapped from the middle to the two right-angled regions 140, and the third corrugated plates 322 make up for the dimensional difference at both ends.

[0056] Specifically, the secondary shielding layer 320 starts from the middle region of the effective arrangement size L and continuously overlaps the second corrugated plates 321 towards the right-angled regions 140 on both sides until the number of second corrugation pitches P2 reaches the calculated number. The remaining size difference on both sides is compensated by the third corrugated plates 322 with compensating corrugation pitches P3. The corrugations of the third corrugated plate 322 closest to the right-angled regions 140 on both sides are aligned with the last corrugation of the main shielding layer 340 closest to the right-angled regions 140 in a direction perpendicular to the main shielding layer 340. To reduce the processing complexity of the corrugated plates, in this embodiment, the compensating corrugation pitch P3 is set to be equal to the first corrugation pitch P1.

[0057] Reference Figure 10 , Figure 11 , Figure 12 and Figure 13 The diagram shown is a schematic representation of Embodiment 5 of the present invention. The main shielding layer 340 is entirely composed of overlapping first corrugated plates 341 with a first wave pitch P1. The secondary shielding layer 320 is a mixed overlapping layer, and the third corrugated plate 322 is overlapped and spliced ​​between the second corrugated plates 321 at intervals.

[0058] Specifically, within the effective arrangement size L, the secondary shielding layer 320 arranges the second corrugated plate 321 and the third corrugated plate 322 alternately or at preset intervals, ensuring that the last corrugation at the closest right-angle region 140 on both sides is aligned vertically with the last main corrugation of the main shielding layer 340. As a further preferred embodiment, the second corrugated plate 321 and the third corrugated plate 322 are arranged symmetrically about the midpoint of the effective arrangement size L. To ensure that the corrugation arrangement on both sides of the midpoint is identical, when calculating the number of second wave pitches P2 and wavelength pitches, at least one of them is made even, while ensuring the maximum number of second wave pitches P2, thus ensuring structural symmetry and uniform stress distribution. In this embodiment, the second wave pitch P2 is 1.5 times the first wave pitch P1, and the compensation wave pitch P3 is equal to the first wave pitch P1. When the number of first wave spacing P1 in the main shielding layer 340 is 7, and the number of second wave spacing P2 in the secondary shielding layer 320 is at most 3, the number of compensation wave spacing P3 is set to 1. The number of second wave spacing P2 and compensation wave spacing P3 are both odd, resulting in asymmetrical corrugation arrangement on both sides of the midpoint. Therefore, the number of second wave spacing P2 is adjusted to 2, and the number of compensation wave spacing P3 can be set to 4. Under this condition, the corrugations of the secondary shielding layer 320 can be symmetrical relative to the midpoint.

[0059] The arrangement of the second and third corrugated plates can be flexibly selected according to the actual engineering situation. In each embodiment, "the number of second corrugated plates with the largest possible second corrugated plate spacing P2" means that within the effective arrangement size LL, as many second corrugated plates 321 with the second corrugated plate spacing P2 as possible are arranged to make full use of the performance advantages brought by their larger corrugated plate spacing, and only the third corrugated plates 322 with the compensating corrugated plate spacing P3 are used to fill in the remaining space where necessary.

[0060] Reference Figures 3 to 13 As shown, the present invention also provides a membrane enclosure system, which is disposed on the inner wall of the storage 100 and includes a corner bend 200 and a membrane layer 300.

[0061] The corner bend 200 is disposed at the connection between adjacent walls of the storage silo 100 via a connector. The corner bend 200 includes a secondary insulation block 210, a secondary shielding block 220, a primary insulation block 230, and a primary shielding block 240 arranged sequentially along the wall surface of the storage silo 100. Therefore, the distance between the inner side of the corner bend 200 and the inner wall of the storage silo 100 is the thickness of the connector plus the thickness of the secondary insulation block 210, the secondary shielding block 220, the primary insulation block 230, and the primary shielding block 240.

[0062] The thin film layer 300 is fixed to each wall of the storage tank 100 by connectors. The thin film layer 300 includes a secondary insulation layer 310, a secondary shielding layer 320, a primary insulation layer 330 and a primary shielding layer 340 arranged sequentially along the wall of the storage tank 100. The secondary insulation layer 310 and the primary insulation layer 330 are respectively connected to the secondary insulation block 210 and the primary insulation block 230. The secondary shielding layer 320 and the primary shielding layer 340 are respectively overlapped and fixed to the secondary shielding block 220 and the primary shielding block 240.

[0063] In this embodiment, the storage silo 100 has a polygonal prism structure, with an octagonal prism decahedron as an example. The two ends of the polygonal prism structure are parallel polygonal walls 110 and 120. Connecting walls 130 connect the first wall 110 and the second wall 120 along the sides of the polygons, and the connecting walls 130 are perpendicular to the first wall 110 and the second wall 120. When the first wall 110 and the second wall 120 are vertically arranged, the angled region between the connecting wall 130 in the horizontal and vertical directions and the first wall 110 and the second wall 120 is a right-angled region 140.

[0064] Corresponding to the right-angled area 140 of the storage silo 100, the main shielding layer 340 is formed by overlapping and splicing first corrugated plates 341 with a first wave pitch P1. The distance d between the last corrugation of the main shielding layer 340 near the corner piece 200 and the orthogonal side of the main shielding block 240 is not greater than the first wave pitch P1. The last corrugation of the secondary shielding layer 320 near the corner piece 200 is aligned with the last corrugation of the main shielding layer 340 near the corner piece 200 in the direction perpendicular to the thin film layer 300. Therefore, when the effective arrangement size L between the two corrugations at both ends of the main shielding layer 340 is an integer multiple of the second wave pitch P2, the secondary shielding layer 320 is entirely formed by overlapping and splicing second corrugated plates 321 with a second wave pitch P2. When the effective arrangement size L divided by the second wave pitch P2 has a remainder, in order to ensure the alignment of the corrugations at both ends of the primary and secondary shielding layers, the secondary shielding layer 320 is formed by a combination of the second corrugated plate 321 and the third corrugated plate 322 with a compensating pitch.

[0065] Furthermore, to avoid the formation of an excessively large non-corrugated area in the secondary shielding layer 320, the distance between the last corrugation on the secondary shielding layer 320 near the corner piece 200 and the orthogonal side of the secondary shielding block 220 is set to be no greater than the second corrugation spacing P2. Since the distance between the last corrugation on the secondary shielding layer 320 near the corner piece 200 and the orthogonal side of the secondary shielding block 220 is greater than the vertical distance between the last corrugation on the primary shielding layer 340 near the corner piece 200 and the orthogonal side of the primary shielding block 240 by the thickness of the primary insulation block 230 and the primary shielding block 240, the second corrugation spacing P2 is at least at least larger than the first corrugation spacing P1 by the thickness of the primary insulation block 230 plus the thickness of the primary shielding block 240.

[0066] When the secondary shielding layer 320 is a mixed overlapping layer, the third corrugated plate 322 can be located at one end of the secondary shielding layer 320 near one of the right-angle regions 140, or the third corrugated plate 322 can be located at both ends of the secondary shielding layer 320 near the right-angle region 140. The third corrugated plate 322 can also be located in the middle of the secondary shielding layer 320. Of course, the third corrugated plate 322 can also be spaced apart from the second corrugated plate 321 on the secondary shielding layer 320. Furthermore, the second corrugated plate 321 and the third corrugated plate 322 can be symmetrically arranged along the centerline of the secondary shielding layer 320.

[0067] This invention is not only applicable to the liquid cargo tanks of LNG carriers, LNG bunkering vessels or LNG-powered ships, but can also be applied to other liquefied gas storage and transportation equipment that requires membrane enclosure systems, such as onshore LNG storage tanks and floating liquefied natural gas production, storage and offloading (FLNG) units.

[0068] 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. A method for arranging right-angled areas in a membrane enclosure system, characterized in that, The membrane enclosure system is installed on the inner wall of the storage silo and includes a membrane layer installed on the wall surface of the storage silo. The membrane layer includes a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer arranged sequentially inward along the wall surface of the storage silo. It also includes corner pieces fixed at the connection between adjacent walls of the storage silo. The corner pieces include secondary insulation blocks, secondary shielding blocks, primary insulation blocks, and primary shielding blocks corresponding to the membrane layer. Includes the following steps: S10: In the right-angled area of ​​the storage chamber, with the distance between the last corrugation of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block not greater than the first corrugation spacing, the maximum number of first corrugation spacings that can be arranged between two opposite right-angled areas is calculated according to the design dimensions of the storage chamber, so that the main shielding layer is set to be formed entirely by overlapping first corrugated plates with the first corrugation spacing, and the main insulation layer corresponds to the splicing of the main shielding layer and the main insulation block; S20: Based on the number of the first wave spacing set in S10, calculate the size between the two farthest waves on the main shielding layer as the effective arrangement size; S30: Calculate whether there is a remainder when the effective arrangement size is divided by the second corrugated pitch. If there is, proceed to step S40; if not, set the secondary shielding layer to be formed entirely by overlapping second corrugated plates with the second corrugated pitch, and align the last corrugation on the second corrugated plate near the right angle region with the last corrugation on the first corrugated plate near the right angle region in a direction perpendicular to the main shielding layer. The secondary insulation layer is spliced ​​with the secondary shielding layer and the secondary insulation block to complete the arrangement of the thin film layer. S40: Within the effective arrangement size, with the maximum number of the second corrugated plates as a constraint, the remaining size difference is compensated by using corrugations with compensating corrugations, so that the secondary shielding layer is set as a hybrid overlapping layer including the second corrugated plate and the third corrugated plate with the compensating corrugations. At the same time, the last corrugation on the secondary shielding layer near the right angle area is aligned with the last corrugation on the first corrugated plate near the right angle area in a direction perpendicular to the main shielding layer. The secondary insulation layer is spliced ​​with the secondary shielding layer and the secondary insulation block to complete the arrangement of the thin film layer.

2. The method for arranging right-angle zones in a membrane enclosure system as described in claim 1, characterized in that, The distance between the last ripple of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block is between half of the first wave spacing and the first wave spacing.

3. The method for arranging right-angled areas in a membrane enclosure system as described in claim 2, characterized in that, The distance between the last ripple of the main shielding layer near the corner piece and the orthogonal sidewall of the main shielding block is the first wave spacing. If the number of first wave spacings that can be set between two opposite right-angled areas is not an integer, the size of the storage compartment is adjusted until the number is an integer.

4. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, The first wave spacing is smaller than the second wave spacing, and the distance between the last wave of the secondary shielding layer and the orthogonal sidewall of the secondary shielding block is not greater than the second wave spacing.

5. The method for arranging right-angled areas in a membrane enclosure system as described in claim 4, characterized in that, The second wave spacing is 1.5 times the first wave spacing.

6. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, The compensation wave spacing is greater than the first wave spacing and less than the second wave spacing.

7. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate continuously overlaps along one of the right-angled areas to the other right-angled area, and the third corrugated plate makes up for the size difference at one end.

8. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate continuously overlaps towards the middle along the two right-angled areas, and the third corrugated plate fills in the dimensional difference in the middle.

9. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a mixed overlapping layer, the second corrugated plate is continuously spliced ​​along the middle towards the two right-angled areas, and the third corrugated plate makes up for the size difference at both ends.

10. A method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a mixed overlapping layer, the third corrugated plate overlaps between the second corrugated plates at intervals.

11. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a hybrid overlapping layer, the compensation wave spacing is equal to the first wave spacing.

12. The method for arranging right-angled areas in a membrane enclosure system as described in claim 1, characterized in that, In step S40, when the secondary shielding layer is a hybrid overlapping layer, at least one of the calculated number of the second wave spacing and the number of the compensation wave spacing is an even number.

13. A membrane enclosure system, characterized in that: Located on the inner wall of the storage warehouse, including: A corner bend is provided at the connection of adjacent walls of the storage chamber via a connector. The corner bend includes a secondary insulation block, a secondary shielding block, a primary insulation block, and a primary shielding block arranged sequentially along the wall of the storage chamber. A thin film layer is fixed to each wall of the storage chamber via the connector. The thin film layer includes a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer arranged sequentially along the wall of the storage chamber. The secondary insulation layer and the primary insulation layer are respectively connected to the secondary insulation block and the primary insulation block. The secondary shielding layer and the primary shielding layer are respectively overlapped and fixed to the secondary shielding block and the primary shielding block. Corresponding to the right-angle area of ​​the storage chamber, the primary shielding layer is formed by overlapping and splicing a first corrugated plate with a first wave pitch. The distance between the last corrugation of the primary shielding layer near the corner member and the orthogonal sidewall of the primary shielding block is not greater than the first wave pitch. The secondary shielding layer is formed by overlapping and splicing a second corrugated plate with a second wave pitch or by overlapping and splicing a second corrugated plate and a third corrugated plate with a compensating spacing. The last corrugation of the secondary shielding layer near the corner member is aligned with the last corrugation of the primary shielding layer near the corner member in a direction perpendicular to the thin film layer.

14. A membrane enclosure system as described in claim 13, characterized in that, The distance between the last ripple on the secondary shielding layer near the corner piece and the orthogonal sidewall of the secondary shielding block is no greater than the second wave spacing.

15. A membrane enclosure system as described in claim 13, characterized in that, The third corrugated plate is located at one end of the secondary shielding layer near one of the right-angled regions.

16. A membrane enclosure system as described in claim 13, characterized in that, The third corrugated plate is located at both ends of the secondary shielding layer near the right-angle region.

17. A membrane enclosure system as described in claim 13, characterized in that, The third corrugated plate is located in the middle of the secondary shielding layer.

18. A membrane enclosure system as described in claim 13, characterized in that, The third corrugated plate and the second corrugated plate are spaced apart on the secondary shielding layer.

19. A membrane enclosure system as described in claim 13, characterized in that, The second and third corrugated plates are symmetrically arranged along the centerline of the secondary shielding layer.

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