Low-temperature liquid cargo tank plane area arrangement structure and arrangement method

Abstract

The application discloses a low-temperature liquid cargo storage tank plane area arrangement structure and arrangement method, and the plane area at least comprises a first arrangement area and a second arrangement area, and the first arrangement area is located between two parallel and opposite right-angle areas. The low-temperature liquid cargo storage tank comprises a secondary insulation layer, a secondary shielding layer, a main insulation layer and a main shielding layer arranged in sequence from outside to inside. The secondary insulation block has a first size in the first arrangement area and a second size in the second arrangement area, and the first size is larger than the second size. By using the larger-size insulation block in the first arrangement area with regular geometric shape, the application reduces installation procedures, improves installation efficiency, reduces splicing seams and improves strength and heat insulation effect.

Description

Technical Field

[0001] This invention relates to the field of cryogenic liquid cargo storage and transportation technology, specifically to a planar layout structure and method for cryogenic liquid cargo storage tanks. Background Technology

[0002] In the field of cryogenic liquid cargo storage and transportation technology, such as liquefied natural gas (LNG), membrane tanks are widely used in LNG carriers and onshore storage tanks due to their advantages such as light weight and high volume utilization. Membrane tanks typically include a supporting structure and an insulation layer and a shielding layer installed inside the supporting structure to isolate the cryogenic liquid cargo from the external environment and prevent leakage.

[0003] The inner surface of a cryogenic liquid cargo storage tank is composed of multiple planes, forming a polyhedral structure, such as a decahedron. Taking a decahedral cryogenic liquid cargo storage tank as an example, its inner surface includes a trihedral corner area, a dihedral corner area, and a planar area. The trihedral corner area is the corner area formed by the intersection of three supporting walls, and the dihedral corner area is the corner area formed by the intersection of two adjacent supporting walls. In this invention, the dihedral corner area is also referred to as the right-angle area. The planar area is the area on the supporting walls excluding the corner areas. During the construction of the storage tank, prefabricated corner modules are laid in the trihedral and dihedral corner areas, while the planar area is the area remaining after excluding the dimensions of the corner modules, requiring on-site installation of components such as insulation blocks and corrugated plates.

[0004] In existing technologies, the insulation layer in the planar area is usually laid using insulation blocks of the same size. That is, insulation blocks of uniform size are laid sequentially from the center of the planar area to both sides until the corner area is reached. In order to accommodate the angled position, the size of the insulation blocks is usually set to be small. Existing technologies do not distinguish the differences in geometric regularity of different areas within the planar area and use uniform small-sized blocks for all areas, resulting in low installation efficiency, many splicing seams, and affecting the insulation performance of cryogenic liquid cargo storage tanks.

[0005] Therefore, it is urgent to improve the existing planar layout structure to make full use of the differences in geometric regularity at different locations in the planar area to improve installation efficiency and structural performance. Summary of the Invention

[0006] This invention addresses the technical problems of low installation efficiency, numerous splicing seams, and poor strength and thermal insulation performance in the planar area of ​​cryogenic liquid cargo storage tanks in the prior art, and provides a planar area layout structure and method for cryogenic liquid cargo storage tanks.

[0007] To solve the above-mentioned technical problems, the present invention provides a planar layout structure for a cryogenic liquid cargo storage tank, wherein the planar area includes at least a first layout area and a second layout area, wherein the first layout area is located between two parallel and opposite right-angled areas. The cryogenic liquid cargo storage tanks include those arranged sequentially from the outside in: The secondary insulation layer is formed by splicing secondary insulation blocks. Each secondary insulation block has a first dimension in the first arrangement area in a direction parallel to the right angle area, and a second dimension in the second arrangement area in a direction parallel to the right angle area. The first dimension is larger than the second dimension. The secondary shielding layer is formed by splicing together secondary corrugated plates. The secondary corrugated plates are provided with a first corrugation that protrudes toward the secondary insulation layer. The first corrugation flips at the edge of the secondary corrugated plate and protrudes toward the inside of the cryogenic liquid cargo storage tank to form a second corrugation. The main insulation layer is formed by splicing together main insulation blocks, and the main insulation blocks are fixedly connected to the secondary corrugated plate at least at four corners. The main shielding layer is formed by splicing together main corrugated plates. The main corrugated plates are provided with a third corrugation that protrudes towards the inside of the cryogenic liquid cargo storage tank. The third corrugation is parallel to the first corrugation. The right-angle area is parallel to the third corrugation and the first corrugation.

[0008] Furthermore, the width of the first arrangement area is less than the length of either of the two opposing right-angled areas.

[0009] Furthermore, the first arrangement area is continuous within the range between the two relative right-angled areas.

[0010] Furthermore, the first arrangement area is spaced apart within the range between the two relative right-angled areas.

[0011] Furthermore, the first arrangement area is symmetrically arranged with respect to the center line of the right-angled area.

[0012] Furthermore, the first dimension is an integer multiple of the second dimension.

[0013] Furthermore, the main insulation block is configured with a third size in the direction parallel to the right-angled area corresponding to the first arrangement area and a fourth size in the direction corresponding to the second arrangement area, wherein the third size is larger than the fourth size.

[0014] Furthermore, a sealant block is provided between the secondary insulation block and the secondary insulation module of the corner area.

[0015] The present invention also provides a method for arranging the above-mentioned planar layout structure of cryogenic liquid cargo storage tank, comprising the following steps: Determine the boundary information of the cryogenic liquid cargo storage tank, including the geometric parameters of the planar area, and the parameters of the first and second dimensions; Within the geometric parameter range of the planar region, determine the number of the secondary insulation blocks having the first size and the secondary insulation blocks having the second size, such that the distance between the secondary insulation blocks located at the edge of the planar region and the dihedral corner region is less than the second size; A first positioning line and a second positioning line are drawn from the geometric center line of the planar area to both sides of the planar area, respectively. The first positioning line and the second positioning line are perpendicular to the direction of the right-angled area. The first positioning line is spaced by a first dimension, and the second positioning line is spaced by a second dimension. Install the corresponding secondary insulation block according to the position of the first positioning line and the second positioning line. Based on the position of the secondary insulation block, fix the secondary corrugated plate, the main insulation block and the main corrugated plate in sequence, so that the second corrugation is connected to the corrugation of the dihedral corner area.

[0016] Furthermore, the first positioning line is drawn continuously within the right-angled region.

[0017] Furthermore, the first positioning line and the second positioning line are drawn at intervals within the right-angled area.

[0018] Furthermore, the main insulation block is configured with a third size in the direction parallel to the right-angled area corresponding to the first arrangement area and a fourth size in the direction corresponding to the second arrangement area, wherein the third size is larger than the fourth size.

[0019] Furthermore, a sealant block is provided in the gap between the secondary insulation block at the edge of the planar area and the dihedral corner area.

[0020] The beneficial effects of this invention are: By setting up a first arrangement area and a second arrangement area in the planar area, and using insulation blocks with a larger first size in the first arrangement area, the regular geometric shape near the right angle area is fully utilized, reducing the number of insulation blocks, thereby reducing installation procedures and improving installation efficiency. It also takes into account the efficient laying of regular areas and the flexible adaptation of irregular areas, making the layout of the planar area more optimized. At the same time, the larger size insulation blocks reduce the number of splicing seams and improve the overall strength and heat insulation effect of the insulation layer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall shape of the cryogenic liquid cargo storage tank of the present invention; Figure 2 This is a schematic diagram of the continuous arrangement of the first arrangement area of ​​the present invention; Figure 3 This is a schematic diagram of the structure of the cryogenic liquid cargo storage tank of the present invention; Figure 4 This is a schematic diagram of the secondary structure of the present invention; Figure 5 This is a schematic diagram of the first arrangement area interval setting of the present invention; Figure 6 This is a schematic diagram showing the symmetrical arrangement of the layout area of ​​the present invention; Figure 7 This is a schematic diagram of the arrangement method of the present invention.

[0022] Explanation of the labels in the diagram: 100, cryogenic liquid cargo storage tank; 110, trihedral area; 120, dihedral area; 121, right-angled area; 130, planar area; 131, first arrangement area; 132, second arrangement area; 10. Secondary insulation layer; 11. Secondary insulation block; 12. Joint filler block; 13. First positioning line; 14. Second positioning line; 20. Secondary shielding layer; 21. Secondary corrugated plate; 22. First corrugation; 23. Second corrugation; 30. Main insulation layer; 31. Main insulation block; 40. Main shielding layer; 41. Main corrugated plate; 42. Third corrugation; D1, first dimension; D2, second dimension. Detailed Implementation

[0023] 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.

[0024] like Figure 1 As shown, the inner surface of the cryogenic liquid cargo storage tank 100 is composed of multiple planes, forming a polyhedral structure. Taking the decahedral cryogenic liquid cargo storage tank 100 as an example, its inner surface includes a trihedral corner area 110, a dihedral corner area 120, and a planar area 130. The trihedral corner area 110 is a corner area formed by the intersection of three bearing walls, and the dihedral corner area 120 is a corner area formed by the intersection of two adjacent bearing walls. Among them, the dihedral corner area 120 perpendicular or parallel to the laying direction is the right-angle area 121 in this embodiment. The planar area 130 is the area on the bearing wall excluding the corner areas. During the construction of the storage tank, prefabricated corner area modules are laid in the trihedral corner area 110 and the dihedral corner area 120, and the planar area 130 is the area remaining after excluding the size of the corner area modules. The corner area modules include a secondary insulation module, a secondary shielding module, a primary insulation module, and a primary shielding module, which are prefabricated in the factory and transported to the site for installation. For the flat area 130, it is necessary to install insulation blocks and corrugated panels on site.

[0025] like Figure 2As shown, the planar region 130 includes at least a first arrangement area 131 and a second arrangement area 132, wherein the first arrangement area 131 is located between two parallel and opposite right-angled areas 121. Specifically, for the planar region 130 of the decahedron, the dihedral area 120 between its top and end faces is a right-angled area 121, and the opposite right-angled area 121 is the dihedral area 120 between its bottom and end faces. The first arrangement area 131 is located between these two right-angled areas 121, that is, the first arrangement area 131 is a rectangular area with the distance between the two right-angled areas 121 as its length and the length of the shorter of the two right-angled areas 121 as its side length. Within this range, the geometry of the first arrangement area 131 is relatively regular, so larger insulation blocks can be installed to reduce installation procedures, improve installation efficiency, reduce the existence of splicing seams, and improve strength and insulation effect. The second arrangement area 132 is the area in the planar area 130 other than the first arrangement area 131. Smaller insulating blocks are used in this area to accommodate possible geometric changes.

[0026] like Figure 3 As shown, the cryogenic liquid cargo storage tank 100 includes, from the outside in, a secondary insulation layer 10, a secondary shielding layer 20, a primary insulation layer 30, and a primary shielding layer 40. The secondary insulation layer 10 is directly disposed on the inner surface of the load-bearing structure, providing a second layer of thermal insulation. The secondary shielding layer 20 is disposed inside the secondary insulation layer 10, providing a second layer of liquid cargo sealing. The primary insulation layer 30 is disposed inside the secondary shielding layer 20, providing a first layer of thermal insulation. The primary shielding layer 40 is disposed inside the primary insulation layer 30, directly contacting the cryogenic liquid cargo, providing a first layer of liquid cargo sealing. This double-layer insulation and double-layer shielding structural design ensures the safe operation of the storage tank under extreme low-temperature conditions.

[0027] Reference Figure 2 As shown, the secondary insulation layer 10 is formed by splicing secondary insulation blocks 11. Within the first arrangement area 131, the secondary insulation block 11 has a first dimension D1 in a direction parallel to the right-angled area 121; within the second arrangement area 132, the secondary insulation block 11 has a second dimension D2 in a direction parallel to the right-angled area 121; the first dimension D1 is larger than the second dimension D2. Since the first arrangement area 131 is located between two parallel and opposite right-angled areas 121, the geometry of this area is relatively regular. Therefore, secondary insulation blocks 11 with a larger first dimension D1 can be used, thereby reducing the number of secondary insulation blocks 11, simplifying installation procedures, improving installation efficiency, and simultaneously reducing the presence of splicing seams, thus improving strength and insulation effect.

[0028] In a preferred embodiment, the first dimension D1 is an integer multiple of the second dimension D2. This integer multiple relationship ensures that the boundary of the secondary insulation block 11 of the first dimension D1 is aligned with a position that is an integer multiple of the second dimension D2, which is beneficial for simplifying the positioning lines and standardizing manufacturing. In this embodiment, it can be twice the size. For example, the second dimension D2 can be 1200mm, and the first dimension D1 is correspondingly 2400mm. By using secondary insulation blocks 11 of twice the size in the first arrangement area 131, the number of secondary insulation blocks 11 in this area can be reduced by half, significantly improving installation efficiency and reducing the number of splicing seams. At the same time, it avoids the insulation material from shrinking significantly when the secondary insulation block 11 is cooled from room temperature to working temperature, which would cause the splicing seam between adjacent blocks to be too large and disrupt the continuity of insulation. In other embodiments, the ratio of the first dimension D1 to the second dimension D2 can be adjusted according to the geometry of the planar area 130 and the manufacturing specifications of the insulation blocks, as long as the first dimension D1 is greater than the second dimension D2.

[0029] like Figure 4 As shown, the secondary shielding layer 20 is formed by splicing together secondary corrugated plates 21. The secondary corrugated plates 21 have first corrugations 22 protruding towards the secondary insulation layer 10. These first corrugations 22 absorb the thermal expansion and contraction deformation of the secondary shielding layer 20 during temperature changes. The first corrugations 22 flip at the edge of the secondary corrugated plates 21, protruding towards the inside of the cryogenic liquid storage tank 100 to form second corrugations 23. The second corrugations 23 facilitate the connection of the secondary corrugated plates 21 at the edge with the corrugations on the corner module of the dihedral corner area 120, ensuring the continuity of the secondary shielding layer 20 between the planar area 130 and the corner area, and also allowing the secondary corrugated plates 21 to cover the seam between the planar area 130 and the dihedral corner area 120. Simultaneously, this results in a smaller receiving groove size on the main insulation layer 30 corresponding to the second corrugations 23, without affecting the strength of the main insulation layer 30. Furthermore, due to the presence of the second corrugation 23, the passage formed between the first corrugations 22 is blocked, thereby effectively blocking the convection of the protective gas filling the space between the main shielding layer 40 and the secondary shielding. The protective gas with a higher temperature at the top of the cryogenic liquid cargo storage tank 100 will not continuously exchange heat with the protective gas with a lower temperature at the bottom of the cryogenic liquid cargo storage tank 100, thereby effectively reducing the evaporation of the liquid cargo in the storage tank and thus reducing cargo loss.

[0030] The main insulation layer 30 is formed by splicing together main insulation blocks 31. The main insulation blocks 31 are fixedly connected to the secondary corrugated plate 21 at least at four corners to ensure a reliable connection between the main insulation layer 30 and the secondary shielding layer 20. The fixing method is usually bolt locking. Through the four corner fixing connection, the main insulation blocks 31 can be firmly installed on the secondary corrugated plate 21 to avoid displacement when the temperature changes or the liquid sloshes.

[0031] In one embodiment, the main insulation block 31 is configured with a third size corresponding to the first arrangement area 131 in a direction parallel to the right-angle region 121, and a fourth size corresponding to the second arrangement area 132, with the third size being larger than the fourth size. That is, in the first arrangement area 131, not only does the secondary insulation block 11 use a larger first size D1, but the main insulation block 31 also uses a larger third size, thereby achieving the same effect of reducing installation procedures and splicing seams in the main insulation layer 30. The ratio of the third size to the fourth size can be the same as or different from the ratio of the first size D1 to the second size D2, depending on the manufacturing specifications of the main insulation block 31 and the structural requirements of the main insulation layer 30.

[0032] The main shielding layer 40 is formed by splicing together main corrugated plates 41. The main corrugated plates 41 have a third corrugation 42 protruding towards the inside of the cryogenic liquid storage tank 100. The third corrugation 42 absorbs the thermal expansion and contraction deformation of the main shielding layer 40 during temperature changes. The third corrugation 42 faces the liquid cargo direction, thus eliminating the need for corresponding clearance grooves on the main insulation layer 30, ensuring the strength of the main insulation layer 30. The third corrugation 42 is parallel to the first corrugation 22, meaning the corrugation direction on the main corrugated plate 41 is consistent with the corrugation direction on the secondary corrugated plate 21. The right-angle region 121 is parallel to both the third corrugation 42 and the first corrugation 22, meaning the extension direction of the corrugations is consistent with the extension direction of the right-angle region 121. The right-angle region 121 is consistent with the laying direction of each layer, ensuring that the secondary insulation block 11 and the main insulation block 31 do not require geometric changes when placed within the first arrangement area 131. This parallel arrangement also facilitates a smooth transition of the corrugations between the planar area 130 and the right-angled area 121, allowing the corrugations to maintain a continuous extension direction throughout the entire inner wall of the tank, thereby improving the overall deformation absorption capacity of the shielding layer.

[0033] like Figure 2 As shown, in one embodiment, the first arrangement area 131 is continuously arranged within the range between two opposing right-angled areas 121. That is, the first arrangement area 131 extends from near one right-angled area 121 to near the other right-angled area 121 without interruption. This continuous arrangement is suitable for cases where the overall geometry of the planar area 130 is relatively regular, allowing the use of larger-sized insulation blocks across the entire width of the planar area 130, minimizing installation procedures and seams.

[0034] like Figure 5As shown, in another embodiment, the first arrangement area 131 is spaced apart within the range between two opposing right-angled areas 121. That is, the first arrangement area 131 is divided into multiple sub-areas by the second arrangement area 132, and the first arrangement area 131 and the second arrangement area 132 are arranged alternately. For example, when the number of secondary insulation blocks 11 with a second size D2 corresponding to the second arrangement area 132 is odd, some of the secondary insulation blocks 11 with a second size D2 can be placed at the center line position of the planar area 130 to ensure that the two sides of the planar area 130 are symmetrical. That is, the arrangement method of the first arrangement area 131 and the second arrangement area 132 can be specifically selected according to the number of secondary insulation blocks 11 with a first size D1 and the number of secondary insulation blocks 11 with a second size D2, as well as the ease of installation.

[0035] Reference Figure 6 As shown, in one embodiment, the first arrangement region 131 is symmetrically arranged relative to the centerline of the right-angle region 121. That is, the secondary insulation blocks 11 with a first size D1 are symmetrically distributed on both sides of the geometric centerline of the planar region 130, with the same number, making the arrangement structure on both sides of the planar region 130 symmetrical. This symmetrical arrangement helps to evenly distribute the dimensional deviations of the planar region 130, avoids the deviations from accumulating on one side, and improves the uniformity of the overall structure.

[0036] The width of the first arrangement area 131 is less than the length of either of the two opposing right-angled areas 121. The length of the right-angled area 121 refers to its dimension along its extension direction, and the width of the first arrangement area 131 refers to its dimension parallel to the extension direction of the right-angled area 121. By limiting the width of the first arrangement area 131 to be less than the length of the right-angled area 121, it can be ensured that the first arrangement area 131 does not exceed the reasonable range of the regular area, while ensuring that the large-sized insulation block within the first arrangement area 131 can be effectively supported. The remaining space in the right-angled area 121 can be used to install a secondary insulation block 11 with a first dimension D1.

[0037] Reference Figure 4 As shown, a caulking block 12 is also provided between the secondary insulation block 11 and the corner secondary insulation module. Because there may be dimensional deviations between the secondary insulation block 11 in the planar area 130 and the prefabricated secondary insulation module in the corner area, especially at the edge of the planar area 130, the gap size between the secondary insulation block 11 and the corner module is uncertain. The caulking block 12 is used to fill this gap, ensuring the continuity and integrity of the secondary insulation layer 10. The caulking block 12 can be made of the same material as the secondary insulation block 11, or other suitable insulation materials can be used. The size of the caulking block 12 is determined according to the actual gap size, and it is cut or a prefabricated caulking block 12 of appropriate specifications is selected during on-site installation.

[0038] The present invention also provides a method for arranging the above-mentioned cryogenic liquid cargo storage tank 100 planar area 130 arrangement structure. For example... Figure 7 As shown, the method includes the following steps: Step 1: Determine the boundary information of the cryogenic liquid cargo storage tank 100, including the geometric parameters of the planar region 130, and the parameters of the first dimension D1 and the second dimension D2. The geometric parameters of the planar region 130 include the length, width, angle, and other dimensional information of each side. These parameters can be obtained by measuring the tank's supporting structure or from the design drawings. The first dimension D1 and the second dimension D2 are determined based on the manufacturing specifications of the insulation block and the geometric characteristics of the planar region 130, where the first dimension D1 is larger than the second dimension D2. When determining the boundary information, the dimensions of the corner modules also need to be considered. The geometric parameters of the planar region 130 are the parameters of the remaining area after excluding the dimensions of the corner modules.

[0039] Step Two: Within the geometric parameter range of the planar area 130, determine the number of secondary insulation blocks 11 with a first size D1 and a second size D2. When determining the number, the distance between the secondary insulation blocks 11 located at the edge of the planar area 130 and the dihedral corner area 120 must be less than the second size D2. By controlling the distance between the edge secondary insulation blocks 11 and the dihedral corner area 120 to be less than the second size D2, it can be ensured that the gap can be effectively filled by the caulking blocks 12, avoiding situations where the gap is too large to be filled with standard caulking blocks 12. Specifically, based on the width of the planar area 130, the first size D1, and the second size D2, calculate the required number of secondary insulation blocks 11 in the first arrangement area 131 and the second arrangement area 132, and adjust the edge positions to ensure that the edge gap meets the above requirements.

[0040] Step 3: Draw a first positioning line 13 and a second positioning line 14 from the geometric center line of the planar area 130 to both sides of the planar area 130. The first positioning line 13 and the second positioning line 14 are perpendicular to the extension direction of the right-angle area 121. Adjacent first positioning lines 13 are spaced by a first dimension D1, and adjacent second positioning lines 14 are spaced by a second dimension D2. The first positioning line 13 corresponds to the first arrangement area 131 and is used to position the secondary insulation block 11 with the first dimension D1; the second positioning line 14 corresponds to the second arrangement area 132 and is used to position the secondary insulation block 11 with the second dimension D2. The positioning lines are drawn starting from the geometric center line of the planar area 130 and proceeding sequentially to both sides, ensuring that the arrangement of the secondary insulation blocks 11 is symmetrical from the center to both sides. This also disperses the dimensional errors of the planar area 130 and the secondary insulation blocks 11 to both sides, avoiding the accumulation of errors at a single location and improving the uniformity of the overall structure.

[0041] In one embodiment, the first positioning line 13 is drawn continuously within the right-angled area 121. That is, the first positioning line 13 extends from one side of the planar area 130 to the other side without interruption, forming a continuous first arrangement area 131. This continuous drawing method is suitable for cases where the overall geometry of the planar area 130 is regular.

[0042] In another embodiment, the first positioning line 13 and the second positioning line 14 are drawn alternately within the right-angle region 121. That is, the first positioning line 13 and the second positioning line 14 are alternately arranged to form an alternately distributed first arrangement area 131 and second arrangement area 132. This arrangement is suitable for accommodating different numbers of secondary insulation blocks 11 of first size D1 and secondary insulation blocks 11 of second size D2.

[0043] Step 4: Install the corresponding secondary insulation blocks 11 according to the positions of the first positioning line 13 and the second positioning line 14. Install the secondary insulation block 11 with the first dimension D1 at the position corresponding to the first positioning line 13, and install the secondary insulation block 11 with the second dimension D2 at the position corresponding to the second positioning line 14. After installation, fix the secondary corrugated plate 21, the main insulation block 31, and the main corrugated plate 41 in sequence based on the positions of the secondary insulation blocks 11. Specifically, firstly, a secondary corrugated plate 21 is fixed to the secondary insulation block 11, with the first corrugation 22 of the secondary corrugated plate 21 facing the secondary insulation layer 10 and the second corrugation 23 located at the edge of the secondary corrugated plate 21 facing the inside of the storage tank. The second corrugation 23 is then welded and fixed to the corrugations of the dihedral corner area 120. Next, a main insulation block 31 is installed on the secondary corrugated plate 21, with the four corners of the main insulation block 31 fixedly connected to the secondary corrugated plate 21. Finally, a main corrugated plate 41 is fixed to the main insulation block 31, with the third corrugation 42 of the main corrugated plate 41 facing the inside of the storage tank. Through the above installation sequence, a reliable connection is formed between the layers, and the corrugations smoothly transition between the planar area 130 and the right-angle area 121, ensuring the continuity of the shielding layer.

[0044] In the arrangement method, the main insulation block 31 is configured with a third size in the direction parallel to the right angle area 121 corresponding to the first arrangement area 131, and a fourth size in the direction corresponding to the second arrangement area 132, with the third size being larger than the fourth size. That is, when installing the main insulation block 31, a main insulation block 31 with a larger third size is used in the first arrangement area 131, and a main insulation block 31 with a smaller fourth size is used in the second arrangement area 132, thereby achieving the same effect of reducing installation procedures and splicing seams in the main insulation layer 30.

[0045] A caulking block 12 is installed in the gap between the secondary insulation block 11 at the edge of the planar area 130 and the dihedral corner area 120. During installation, after the secondary insulation blocks 11 are arranged, caulking blocks 12 are installed in the gap between the edge secondary insulation blocks 11 and the corner area secondary insulation modules to fill dimensional deviations and ensure the continuity of the insulation layer. The size of the caulking block 12 is determined according to the actual gap size, and it is either cut on-site or a prefabricated caulking block 12 of appropriate specifications is selected.

[0046] 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 planar layout structure for a cryogenic liquid cargo storage tank, characterized in that, The planar area includes at least a first arrangement area and a second arrangement area, wherein the first arrangement area is located between two parallel and opposite right-angled areas; The cryogenic liquid cargo storage tanks include those arranged sequentially from the outside in: The secondary insulation layer is formed by splicing secondary insulation blocks. Each secondary insulation block has a first dimension in the first arrangement area in a direction parallel to the right angle area, and a second dimension in the second arrangement area in a direction parallel to the right angle area. The first dimension is larger than the second dimension. The secondary shielding layer is formed by splicing together secondary corrugated plates. The secondary corrugated plates are provided with a first corrugation that protrudes toward the secondary insulation layer. The first corrugation flips at the edge of the secondary corrugated plate and protrudes toward the inside of the cryogenic liquid cargo storage tank to form a second corrugation. The main insulation layer is formed by splicing together main insulation blocks, and the main insulation blocks are fixedly connected to the secondary corrugated plate at least at four corners. The main shielding layer is formed by splicing together main corrugated plates. The main corrugated plates are provided with a third corrugation that protrudes towards the inside of the cryogenic liquid cargo storage tank. The third corrugation is parallel to the first corrugation. The right-angle area is parallel to the third corrugation and the first corrugation.

2. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The width of the first arrangement area is less than the length of either of the two opposing right-angled areas.

3. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The first arrangement area is continuous within the range between the two relative right-angled areas.

4. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The first arrangement area is spaced apart within the range between the two relative right-angled areas.

5. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The first arrangement area is symmetrically arranged with respect to the center line of the right-angled area.

6. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The first dimension is an integer multiple of the second dimension.

7. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, The main insulation block is configured with a third size in the direction parallel to the right-angled area corresponding to the first arrangement area and a fourth size in the direction corresponding to the second arrangement area, wherein the third size is larger than the fourth size.

8. The planar layout structure of the cryogenic liquid cargo storage tank as described in claim 1, characterized in that, A sealant block is also provided between the secondary insulation block and the secondary insulation module of the right-angle zone.

9. A method for arranging the planar area layout structure of a cryogenic liquid cargo storage tank as described in any one of claims 1-8, characterized in that: Determine the boundary information of the cryogenic liquid cargo storage tank, including the geometric parameters of the planar area, the parameters of the first dimension and the second dimension; Within the geometric parameter range of the planar region, determine the number of the secondary insulation blocks having the first size and the secondary insulation blocks having the second size, such that the distance between the secondary insulation blocks located at the edge of the planar region and the dihedral corner region is less than the second size; A first positioning line and a second positioning line are drawn from the geometric center line of the planar area to both sides of the planar area, respectively. The first positioning line and the second positioning line are perpendicular to the direction of the right-angled area. The first positioning line is spaced by a first dimension, and the second positioning line is spaced by a second dimension. Install the corresponding secondary insulation block according to the position of the first positioning line and the second positioning line. Based on the position of the secondary insulation block, fix the secondary corrugated plate, the main insulation block and the main corrugated plate in sequence, so that the second corrugation is connected to the corrugation of the dihedral corner area.

10. The method for arranging the planar area of ​​cryogenic liquid cargo storage tanks as described in claim 9, characterized in that, The first positioning line is drawn continuously within the right-angled area.

11. The method for arranging the planar area of ​​cryogenic liquid cargo storage tanks as described in claim 9, characterized in that, The first positioning line and the second positioning line are drawn at intervals within the right-angled area.

12. The method for arranging the planar area of ​​cryogenic liquid cargo storage tanks as described in claim 9, characterized in that, The main insulation block is configured with a third size in the direction parallel to the right-angled area corresponding to the first arrangement area and a fourth size in the direction corresponding to the second arrangement area, wherein the third size is larger than the fourth size.

13. The method for arranging the planar area of ​​cryogenic liquid cargo storage tanks as described in claim 12, characterized in that, A sealant block is provided in the gap between the secondary insulation block at the edge of the planar area and the right-angled area.

Images