Bearing and heat insulation structure of film storage tank

Abstract

The utility model provides a thin film storage tank bearing heat insulation structure which comprises a tank bottom heat insulation structure covering the tank bottom of an outer tank and a tank wall heat insulation structure covering the tank wall of the outer tank, the tank bottom heat insulation structure comprises a center module and a plurality of circles of circumferential modules, and each circle of circumferential module comprises a plurality of sub-bottom modules arranged at intervals in the circumferential direction. The plurality of circles of circumferential modules are uniformly dispersed outwards by taking the central module as a reference and are paved at the bottom of the outer tank; the tank wall heat insulation structure comprises a plurality of circles of tank wall modules, each circle of tank wall module comprises a plurality of first sub-wall modules and a plurality of second sub-wall modules which are arranged in a staggered mode in the circumferential direction, and the first sub-wall modules correspond to the sub-bottom modules of the outermost circle of circumferential module in a one-to-one mode. And the plurality of second sub-wall modules are in one-to-one correspondence with side seams among the plurality of sub-bottom modules of the outermost circle of circumferential module. The load-bearing heat insulation structure adopts a modular design, and is convenient to install and construct, especially a large-size storage tank with the diameter of dozens of meters, under the premise of ensuring load bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of storage tank heat insulation, and particularly relates to a load-bearing heat insulation structure for a thin-film storage tank. Background Technique

[0002] With the proposal of China's "dual carbon" goal, natural gas, as a clean fossil energy, has seen a growing demand day by day. Various types of large-capacity LNG (liquefied natural gas) storage tanks, such as full containment tanks and thin-film tanks, are being vigorously constructed across the country. As an emerging tank type for storing LNG at low temperature and normal pressure, the thin-film storage tank has a strong development momentum in the LNG low-temperature industry due to its advantages such as relatively large volume and unrestricted volume.

[0003] The thin-film inner tank of the thin-film storage tank is a non-self-supporting structure, which only has the functions of airtightness and liquid tightness. The liquid phase load and other loads applied to the thin-film inner tank are all transferred to the self-supporting outer tank through the load-bearing heat insulation structure. For example, the double-metal low-temperature thin-film storage tank structure for liquefied natural gas storage disclosed in CN201620085997.X includes a main container of the thin-film inner tank, a secondary container arranged outside the main container, a first load-bearing heat insulation layer and a second load-bearing heat insulation layer arranged between the main container and the secondary container. The first load-bearing heat insulation layer is located in the annular space formed by the main container and the secondary container, and the second load-bearing heat insulation layer is located at the bottom of the main container. Moreover, the first load-bearing heat insulation layer and the second load-bearing heat insulation layer form a sealed heat insulation space to transfer the liquid pressure to the secondary container.

[0004] The thin-film storage tank has a large size and a non-planar interior. How to design the first load-bearing heat insulation layer and the second load-bearing heat insulation layer to ensure the heat insulation effect and reduce the construction difficulty of its installation is a technical problem that needs to be solved urgently. Content of the Utility Model

[0005] The utility model aims to solve the technical problems existing in the prior art, and the purpose of the utility model is to provide a load-bearing heat insulation structure for a thin-film storage tank.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A load-bearing and heat-insulating structure for a thin-film storage tank, the heat-insulating structure is arranged between the inner thin-film tank and the outer tank, and includes a bottom heat-insulating structure covering the bottom of the outer tank and a wall heat-insulating structure covering the wall of the outer tank. The bottom heat-insulating structure includes a central module installed at the center of the bottom of the outer tank and several circumferential modules surrounding the central module. Each circumferential module includes several sub-bottom modules arranged at intervals in the circumferential direction. The several circumferential modules diverge evenly outward with the central module as the reference and cover the bottom of the outer tank; the wall heat-insulating structure includes several wall modules with the same structure arranged along the height direction of the wall of the outer tank. Each wall module includes several first sub-wall modules and several second sub-wall modules arranged alternately in the circumferential direction. The several first sub-wall modules are arranged in one-to-one correspondence with several sub-bottom modules of the outermost circumferential module and are located inside the two side edges of the sub-bottom module. The several second sub-wall modules are arranged in one-to-one correspondence with the side seams between several sub-bottom modules of the outermost circumferential module.

[0007] In the above technical solution, the load-bearing and heat-insulating structure adopts a modular design. Under the premise of ensuring load-bearing, the installation and construction are convenient, especially for large-size storage tanks with a diameter of dozens of meters.

[0008] In a preferred embodiment of the utility model, the central module is a regular polygon, the sub-bottom module is a trapezoid, and the outside of the bottom heat-insulating structure is a regular polygon; the first sub-wall module is arranged corresponding to the straight-edge segment of the regular polygon of the bottom heat-insulating structure, the second sub-wall module is arranged corresponding to the vertex angle of the regular polygon of the bottom heat-insulating structure, the inner side of the first sub-wall module is a rectangular plane, the inner side of the second sub-wall module is an obtuse angle, and the vertex of the obtuse angle is aligned with the side seam. The inner side of the wall heat-insulating structure is a regular polygon with the same number of sides as the outside of the bottom heat-insulating structure and the vertex angles aligned.

[0009] In the above technical solution, the central module is a regular polygon and the sub-bottom module is a trapezoid. Compared with the central module being a circle and the sub-bottom module being an arc, this solution is more conducive to the positioning during the installation of the bottom heat-insulating structure and shortens the construction period; the outside of the bottom heat-insulating structure is a regular polygon, the inner side of the wall heat-insulating structure is a matching regular polygon, and the second sub-wall module is arranged corresponding to the vertex angle of the regular polygon of the bottom heat-insulating structure, and the first sub-wall module is arranged corresponding to the straight-edge segment of the regular polygon of the bottom heat-insulating structure, which is conducive to the positioning during the installation of the wall heat-insulating structure and shortens the construction period.

[0010] In a preferred embodiment of the utility model, the wall of the outer tank is circular, the outside of the wall heat-insulating structure is circular, and the outside of both the first sub-wall module and the second sub-wall module is arc-shaped.

[0011] In the above technical solution, the outer side of the tank wall heat insulation structure is circular and fits closely with the circular outer tank wall, which can evenly transfer various loads in the thin-film inner tank to the outer tank, greatly reducing the probability of the load-bearing heat insulation structure breaking, so as to improve the reliability of the thin-film storage tank during operation; moreover, the outer tank wall is circular, which reduces the construction difficulty of the thin-film storage tank compared with other shapes (such as regular polygons).

[0012] In a preferred embodiment of the present utility model, the first sub-wall module includes an inner sub-module and an outer sub-module fixedly connected to the outer side of the inner sub-wall module. Both the inner side and the outer side of the inner sub-wall module are rectangular planes. The inner side of the outer sub-wall module is a rectangular plane aligned with the outer side of the inner sub-wall module, and the outer side of the outer sub-wall module is arc-shaped.

[0013] In the above technical solution, the first sub-wall module is set as an "adjustment module" composed of two parts, which can be adjusted according to the change of the storage tank diameter, and has strong practicability.

[0014] In another preferred embodiment of the present utility model, a suspended roof is provided below the tank top of the outer tank, and a suspended roof heat insulation layer is installed on the suspended roof, and the edge of the suspended roof heat insulation layer extends to the tank wall heat insulation structure.

[0015] In the above technical solution, by providing a suspended roof heat insulation layer, heat insulation protection is provided for the upper part of the thin-film inner tank, and the heat insulation and heat preservation performance of the thin-film storage tank is improved.

[0016] In another preferred embodiment of the present utility model, an L-shaped corner heat insulation structure is provided at the connection between the tank bottom heat insulation structure and the tank wall heat insulation structure. The corner heat insulation structure includes a number of L-shaped first sub-corner modules and a number of L-shaped second sub-corner modules arranged circumferentially and alternately; the upper ends of the number of first sub-corner modules correspond to and are aligned with a number of first sub-wall modules of the lowermost ring of tank wall modules one by one, and the inner ends of the number of first sub-corner modules are installed on the straight edge segments of the regular polygon of the tank bottom heat insulation structure; the upper ends of the number of second sub-corner modules correspond to and are aligned with a number of second sub-wall modules of the lowermost ring of tank wall modules one by one, and the inner ends of the number of second sub-corner modules are installed at the respective vertices of the regular polygon of the tank bottom heat insulation structure.

[0017] In the above technical solution, by providing an L-shaped corner heat insulation structure to connect the tank bottom heat insulation structure and the tank wall heat insulation structure, the installation at the connection between the tank bottom heat insulation structure and the tank wall heat insulation structure is faster, and the load-bearing heat insulation effect is better.

[0018] In another preferred embodiment of the present utility model, the inner side of the corner heat insulation structure is a regular polygon with the same number of sides as the outer side of the tank bottom heat insulation structure and the vertices aligned. Both inner sides of the first sub-corner module are rectangular planes, and the inner side of the second sub-corner module is an obtuse angle, and the vertex of the obtuse angle is aligned with the vertex of the regular polygon of the tank bottom heat insulation structure.

[0019] In the above technical solution, the inner side of the corner heat insulation structure matches the outer side of the bottom heat insulation structure of the tank and is a regular polygon, enabling quick installation positioning and high construction efficiency.

[0020] In another preferred embodiment of the present utility model, the outer side of the corner heat insulation structure is circular, and the outer sides of the first sub-corner module and the second sub-corner module are both arc-shaped.

[0021] In the above technical solution, the outer side of the corner heat insulation structure is circular and closely fits the outer wall of the circular outer tank, greatly reducing the probability of the load-bearing heat insulation structure breaking, so as to improve the reliability of the thin-film storage tank during operation.

[0022] In another preferred embodiment of the present utility model, the first sub-corner module includes an L-shaped inner sub-corner module and an outer sub-corner module with a flat plate fixedly connected to the outer side of the inner sub-corner module. Two inner sides and one outer side of the inner sub-corner module are rectangular planes, the inner side of the outer sub-corner module is a rectangular plane aligned with the outer side of the inner sub-corner module, and the outer side of the outer sub-corner module is arc-shaped.

[0023] In the above technical solution, the first sub-corner module is set as an "adjustment module" composed of two parts, which can be adjusted according to the change of the tank diameter, and has strong practicability.

[0024] Compared with the prior art, the beneficial effects of the relatively superior technical solution of the present utility model are as follows:

[0025] 1) The reliability of the storage tank is improved. The outer side of the load-bearing heat insulation structure of the present utility model is circular and closely fits the outer wall of the circular outer tank body, which can evenly transfer various loads in the thin-film inner tank to the outer tank, greatly reducing the probability of the load-bearing heat insulation structure breaking, and thus improving the reliability of the thin-film storage tank during operation.

[0026] 2) The construction difficulty of the thin-film storage tank is reduced. After adopting the load-bearing heat insulation structure of the present utility model, the outer tank can adopt circular concrete tank bodies and metal tank bodies, which are widely used in China and are easy to organize personnel and construction machinery. Particularly, the thin-film storage tank with a metal tank body does not require formwork and concrete curing, and the construction period can be further shortened.

[0027] 3) The versatility of the thin-film storage tank is improved. The load-bearing heat insulation structure of the present utility model can be applied to circular concrete tanks and metal tanks, and has good versatility and popularization.

[0028] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0030] Figure 1 is a schematic structural view of the load-bearing and heat-insulating structure of the thin-film storage tank in the first embodiment.

[0031] Figure 2 is Figure 1 the sectional view taken along A-A in

[0032] Figure 3 is Figure 2 the axonometric view of the partial view at A in

[0033] Figure 4 is the exploded view of the first sub-wall module and the first sub-corner module.

[0034] The reference numerals in the accompanying drawings of the specification include: foundation cap 1, outer tank 2, tank bottom 21, tank wall 22, tank top 23, thin-film inner tank 3, tank bottom heat-insulating structure 4, central module 41, sub-bottom module 42, side seam 43, corner heat-insulating structure 5, first sub-corner module 51, inner sub-corner module 511, outer sub-corner module 512, second sub-corner module 52, tank wall heat-insulating structure 6, first sub-wall module 61, inner sub-wall module 611, outer sub-wall module 612, second sub-wall module 62, vertex 621, suspended roof 7, suspended roof heat-insulating layer 8. Detailed Description of the Embodiments

[0035] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0037] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] The present utility model provides a load-bearing and heat-insulating structure for a thin-film storage tank. As Figures 1-3 shown, in a preferred embodiment, the load-bearing and heat-insulating structure is arranged between the thin-film inner tank 3 and the outer tank 2. The outer tank 2 in this embodiment is a circular vertical tank, installed on the concrete foundation platform 1, which is a self-supporting structure, and the material is stainless steel or prestressed concrete. The outer tank 2 includes a tank bottom 21, a tank wall 22, and a tank top 23. When the material of the outer tank 2 is prestressed concrete, the tank bottom 21 is the foundation platform 1.

[0040] The load-bearing and heat-insulating structure includes a tank bottom heat-insulating structure 4 covering the tank bottom 21 of the outer tank and a tank wall heat-insulating structure 6 covering the tank wall 22 of the outer tank.

[0041] The tank bottom heat-insulating structure 4 is installed and fixed on the tank bottom 21 of the outer tank. The tank bottom heat-insulating structure 4 includes a central module 41 of a flat plate installed at the center of the tank bottom 21 of the outer tank 2 and several circumferential modules surrounding the central module 41. Figure 2 As shown in the figure, three circumferential modules are provided. Each circumferential module includes several sub-bottom modules 42 of flat plates arranged at circumferential intervals. The several circumferential modules diverge evenly outward with the central module 41 as the reference and cover the tank bottom 21 of the outer tank.

[0042] The tank wall heat-insulating structure 6 is installed and fixed on the inner wall of the tank wall 22 of the outer tank. The tank wall heat-insulating structure 6 includes several laps of tank wall modules with the same structure arranged along the height direction of the tank wall 22 of the outer tank. Each lap of the tank wall module includes several first sub-wall modules 61 and several second sub-wall modules 62 of flat plates arranged in a circumferential staggered manner. The several first sub-wall modules 61 are arranged in one-to-one correspondence with several sub-bottom modules 42 of the outermost circumferential module and are located inside the two side edges of the sub-bottom module 42. The several second sub-wall modules 62 are arranged in one-to-one correspondence with the side seams 43 between several sub-bottom modules 42 of the outermost circumferential module.

[0043] After the installation of the load-bearing and heat-insulating structure is completed, the whole is in a cylindrical shape, and the material is a composite heat-insulating board (including but not limited to perlite cold box, rigid polyurethane plastic, etc., high specific strength, low thermal conductivity materials and composite structure materials). A stainless steel plate for welding the thin-film inner tank 3 is prefabricated on the inner surface. The thin-film inner tank 3 is composed of stainless steel diaphragms, which are grooved and ribbed stainless steel plates with a thickness of 0.8 - 2 mm, and are welded to the embedded stainless steel plates on the surface of the load-bearing and heat-insulating structure.

[0044] As Figure 1 shown, in the present utility model, a suspended roof 7 is hung below the top of the outer tank 23 by a certain number of tie rods. A suspended roof thermal insulation layer 8 is installed on the suspended roof 7. The edge of the suspended roof thermal insulation layer 8 extends to the tank wall thermal insulation structure 6. The suspended roof thermal insulation layer 8 is composed of fiberglass wool with a total thickness of about 0.8 - 1.2 m, providing thermal insulation protection for the upper part of the thin-film inner tank 3. The gap between the suspended roof thermal insulation layer 8 and the tank wall thermal insulation structure 6 is filled with a polyurethane foam board for sealing.

[0045] As Figure 2 and Figure 3 shown, in a preferred embodiment, for facilitating the installation and positioning of the thermal insulation structure, the central module 41 is set as a regular polygon, and the sub-bottom module 42 is designed as a trapezoid, so that the outer side of the assembled tank bottom thermal insulation structure 4 is a regular polygon (with more sides, approaching a circle).

[0046] Correspondingly, the first sub-wall module 61 is arranged corresponding to the straight side segments of the regular polygon of the tank bottom thermal insulation structure 4, and the second sub-wall module 62 is arranged corresponding to the top angles of the regular polygon of the tank bottom thermal insulation structure 4 (i.e., the outer edge of the side seam 43 between the sub-bottom modules 42). The inner side of the first sub-wall module 61 is a rectangular plane, and the outer side of the first sub-wall module 61 is an arc. The inner side of the second sub-wall module 62 is an obtuse angle, and the vertex 621 of the obtuse angle is aligned with the side seam 43, so that the inner side of the assembled tank wall thermal insulation structure 6 is a regular polygon with the same number of sides and aligned top angles as the outer side of the tank bottom thermal insulation structure 4, and the outer side of the tank wall thermal insulation structure 6 is a circle.

[0047] As Figures 1-3 shown, in another preferred embodiment, for facilitating the connection at the joint of the tank bottom thermal insulation structure 4 and the tank wall thermal insulation structure 6, an L-shaped corner thermal insulation structure 5 is provided at the joint of the tank bottom thermal insulation structure 4 and the tank wall thermal insulation structure 6. The corner thermal insulation structure 5 is installed and fixed at the 90° corner where the tank wall 22 intersects with the tank bottom 21. After assembly, the overall outer side of the corner thermal insulation structure 5 is a circle, and the inner side is a regular polygon with the same number of sides and aligned top angles as the outer side of the tank bottom thermal insulation structure 4, that is, the inner side of the corner thermal insulation structure 5 matches the outer side of the tank bottom thermal insulation structure 4.

[0048] Specifically, as Figure 3 and Figure 4As shown in the figure, the corner heat insulation structure 5 includes a number of L-shaped first sub-corner modules 51 and a number of L-shaped second sub-corner modules 52 that are arranged circumferentially and staggered. The upper ends of the number of first sub-corner modules 51 correspond to and are aligned with a number of first sub-wall modules 61 of the lowermost ring of tank wall modules one by one. The inner ends of the number of first sub-corner modules 51 are installed on the straight edge segments of the regular polygon of the bottom tank heat insulation structure 4. Both inner sides of the first sub-corner module 51 are rectangular planes, and the outer sides of the first sub-corner module 51 are all arc-shaped and fit the inner wall of the tank wall 22. The upper ends of the number of second sub-corner modules 52 correspond to and are aligned with a number of second sub-wall modules 62 of the lowermost ring of tank wall modules one by one. The inner ends of the number of second sub-corner modules 52 are installed at the respective vertices of the regular polygon of the bottom tank heat insulation structure 4. Both inner sides of the second sub-corner module 52 are obtuse angles, and the vertex 621 of the obtuse angle is aligned with the vertex angle of the regular polygon of the bottom tank heat insulation structure 4. The outer sides of the second sub-corner module 52 are all arc-shaped and fit the inner wall of the tank wall 22.

[0049] As Figure 4 shown, in another preferred embodiment, the first sub-wall module 61 includes an inner sub-module and an outer sub-wall module 612 fixedly connected to the outer side of the inner sub-wall module 611. The first sub-corner module 51 includes an L-shaped inner sub-corner module 511 and a flat outer sub-corner module 512 fixedly connected to the outer side of the inner sub-corner module 511. Both the inner and outer sides of the inner sub-wall module 611 are rectangular planes. Both inner sides and one outer side of the inner sub-corner module 511 are also rectangular planes. When the diameter of the storage tank changes, the lengths of the inner sub-wall module 611 and the inner sub-corner module 511 or the splicing lengths are adjusted. The materials of the inner sub-wall module 611 and the inner sub-corner module 511 are composite heat insulation boards. The materials of the outer sub-wall module 612 and the outer sub-corner module 512 are rigid polyurethane foam. The inner side of the outer sub-wall module 612 is a rectangular plane aligned with the outer side of the inner sub-wall module 611. The inner side of the outer sub-corner module 512 is a rectangular plane aligned with the outer side of the inner sub-corner module 511. The outer sides of the outer sub-wall module 612 and the outer sub-corner module 512 are all arc-shaped, and the radian and chord height are adjusted according to the diameter of the storage tank, and the minimum edge thickness is about 90 mm.

[0050] In this embodiment, the second sub-wall module 62 and the second sub-corner module 52 are set as "fixed modules", and the lengths of their inner obtuse sides and the outer arcs are fixed and relatively short. The first sub-wall module 61 and the first sub-corner module 51 are set as "adjustable modules" composed of two parts and can be adjusted according to the change of the storage tank diameter. For example, the outer arc radius of the second sub-wall module 62 and the second sub-corner module 52 is 20 m, and the arc length is about 0.9 m, which is applicable to cylindrical concrete / metal outer tanks with a diameter of 40 - 88 m, and the maximum gap with the tank wall 22 is less than 3 mm. In practice, the angle of the inner obtuse side of the second sub-wall module 62 and the second sub-corner module 52 needs to consider the comprehensive volume utilization rate and installation economy.

[0051] In the description of this specification, the descriptions referring to terms such as "preferred embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A load-bearing and heat-insulating structure for a thin-film storage tank, the load-bearing and heat-insulating structure being arranged between an inner thin-film tank and an outer tank, and comprising a bottom heat-insulating structure covering the bottom of the outer tank and a wall heat-insulating structure covering the wall of the outer tank, characterized in that, The bottom insulation structure of the tank includes a central module installed at the center of the bottom of the outer tank, and several circumferential modules surrounding the central module. Each circumferential module includes several sub-bottom modules arranged at intervals in the circumferential direction. The several circumferential modules diverge uniformly outward with the central module as the reference and cover the bottom of the outer tank in a continuous manner. The wall insulation structure of the tank includes multiple circumferential wall modules with the same structure arranged along the height direction of the outer tank wall. Each circumferential wall module includes several first sub-wall modules and several second sub-wall modules arranged alternately in the circumferential direction. The several first sub-wall modules are arranged in one-to-one correspondence with and on both sides of the several sub-bottom modules of the outermost circumferential module, and the several second sub-wall modules are arranged in one-to-one correspondence with the side seams between the several sub-bottom modules of the outermost circumferential module.

2. The load-bearing and heat-insulating structure of a thin-film storage tank according to claim 1, characterized in that, The central module is a regular polygon, the sub-bottom module is a trapezoid, and the outer side of the bottom insulation structure of the tank is a regular polygon. The first sub-wall module is arranged corresponding to the straight side segment of the regular polygon of the bottom insulation structure of the tank, and the second sub-wall module is arranged corresponding to the vertex angle of the regular polygon of the bottom insulation structure of the tank. The inner side of the first sub-wall module is a rectangular plane, and the inner side of the second sub-wall module is an obtuse angle, and the vertex of the obtuse angle is aligned with the side seam. The inner side of the wall insulation structure of the tank is a regular polygon with the same number of sides as the outer side of the bottom insulation structure of the tank and the vertex angles aligned.

3. The load-bearing and heat-insulating structure of a thin-film storage tank according to claim 2, characterized in that, The outer tank wall is circular, the outer side of the wall insulation structure of the tank is circular, and the outer sides of both the first sub-wall module and the second sub-wall module are arc-shaped.

4. A load-bearing and heat-insulating structure for a thin-film storage tank according to claim 3, wherein, The first sub-wall module includes an inner sub-module and an outer sub-wall module fixedly connected to the outer side of the inner sub-wall module. The inner side and the outer side of the inner sub-wall module are both rectangular planes. The inner side of the outer sub-wall module is a rectangular plane aligned with the outer side of the inner sub-wall module, and the outer side of the outer sub-wall module is arc-shaped.

5. A load-bearing and heat-insulating structure for a thin-film storage tank according to any one of claims 1-4, characterized in that, A suspended roof is provided below the top of the outer tank. A suspended roof insulation layer is installed on the suspended roof, and the edge of the suspended roof insulation layer extends to the wall insulation structure of the tank.

6. A load-bearing and heat-insulating structure for a thin-film storage tank according to any one of claims 2 to 4, characterized in that An L-shaped corner insulation structure is provided at the connection between the bottom insulation structure and the wall insulation structure of the tank. The corner insulation structure includes several L-shaped first sub-corner modules and several L-shaped second sub-corner modules arranged alternately in the circumferential direction. The upper ends of the several first sub-corner modules are arranged in one-to-one correspondence with and aligned with the several first sub-wall modules of the lowermost circumferential wall module, and the inner ends of the several first sub-corner modules are installed on the straight side segments of the regular polygon of the bottom insulation structure of the tank. The upper ends of the several second sub-corner modules are arranged in one-to-one correspondence with and aligned with the several second sub-wall modules of the lowermost circumferential wall module, and the inner ends of the several second sub-corner modules are installed at each vertex angle of the regular polygon of the bottom insulation structure of the tank.

7. The load-bearing and heat-insulating structure of a thin-film storage tank according to claim 6, characterized in that, The inner side of the corner insulation structure is a regular polygon with the same number of sides as the outer side of the bottom insulation structure of the tank and the vertex angles aligned. The two inner sides of the first sub-corner module are both rectangular planes, and the inner side of the second sub-corner module is an obtuse angle, and the vertex of the obtuse angle is aligned with the vertex angle of the regular polygon of the bottom insulation structure of the tank.

8. A load-bearing and heat-insulating structure for a thin-film storage tank according to claim 7, characterized in that, The outer side of the corner insulation structure is circular, and the outer sides of both the first sub-corner module and the second sub-corner module are arc-shaped.

9. A load-bearing and heat-insulating structure for a thin-film storage tank according to claim 8, wherein, The first sub-corner module includes an L-shaped inner sub-corner module and an outer sub-corner module in the form of a flat plate fixedly connected to the outside of the inner sub-corner module. Two inner sides and one outer side of the inner sub-corner module are rectangular planes, the inner side of the outer sub-corner module is a rectangular plane aligned with the outer side of the inner sub-corner module, and the outer side of the outer sub-corner module is arc-shaped.

Images