Heat insulation layer gap filling structure, corner area insulation module, heat insulation layer and thin film tank

Abstract

The invention discloses a heat insulation layer gap filling structure, a corner area insulation module, a heat insulation layer and a thin film tank, and relates to the technical field of liquefied gas storage, the heat insulation layer gap filling structure is used for being arranged in a gap of the heat insulation layer of the thin film tank, and the heat insulation layer comprises an inner plywood layer, a polyurethane layer and an outer plywood layer which are sequentially arranged; the gaps of the heat insulation layer comprise gaps formed among the polyurethane blocks forming the polyurethane layer; the heat insulation layer gap filling structure comprises a U-shaped filling structure, the U-shaped filling structure is arranged in a gap between the polyurethane blocks and adheres to the polyurethane blocks on the two sides of the gap, and the U-shaped filling structure seals the gap between the polyurethane blocks and can adapt to deformation of the gap between the polyurethane blocks. Therefore, liquefied natural gas can be prevented from leaking cold through gaps of the heat insulation layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquefied gas storage, in particular to an adiabatic layer gap filling structure, an angle area insulation module, an adiabatic layer and a membrane tank. BACKGROUND

[0002] The membrane tank is a new type of tank technology for storing liquefied natural gas, and the membrane tank usually comprises an adiabatic layer, a secondary shielding layer, a plywood layer and a primary shielding layer. Figure 1 As shown in the figure, the adiabatic layer comprises an angle area insulation box 1' and a plane insulation box 2'; the angle area insulation box 1' comprises an angle area metal plate layer and two or three insulation boxes 11' connected with the angle area metal plate layer, and the insulation box 11' usually comprises an inner plywood layer, a polyurethane layer and an outer plywood layer. The adiabatic layer usually comprises the following gaps: the first gap A is usually arranged between the insulation boxes 11' constituting the angle area insulation box 1' to absorb the angle deformation caused by pressure and temperature load; the second gap B is usually arranged between adjacent angle area insulation boxes 1', between adjacent plane insulation boxes 2' and between the angle area insulation box 1' and the plane insulation box 2' to meet the characteristics of low-temperature shrinkage of the material and the feasibility of construction.

[0003] In order to avoid cold leakage at the above-mentioned gaps, some plugging measures are adopted in the prior art, but the following problems still exist: for the first gap A, the box wall of the insulation box 11' is planar, and in the prior art, single-layer glass wool is filled in the first gap A for plugging, but when the insulation box 11' is deformed greatly due to low-temperature shrinkage or external load, the first gap A will become larger, resulting in the formation of an air flow channel between the insulation box 11' and the glass wool, and the low-temperature gas near the liquid cargo space is easy to directly reach the outer tank wall through the air flow channel, thereby causing cold leakage; for the second gap B, in the prior art, the box wall of the insulation box 11' is arranged in a structure of wide at the top and narrow at the bottom, and single-layer glass wool is filled in the second gap B for plugging, but when the insulation box 11' is deformed greatly due to low-temperature shrinkage or external load, the width of the second gap B can be increased by about 10 mm at most, and the elastic deformation amount of the glass wool cannot compensate for the size change of the widened gap, resulting in the re-formation of a gap between the insulation box 11' and the glass wool, and the heat exchange and convection of the gas in the gap, thereby causing cold leakage.

[0004] Therefore, how to effectively solve the problem of cold leakage of the adiabatic layer gap of the membrane tank has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the present application aims to provide an adiabatic layer gap filling structure, an angle area insulation module, an adiabatic layer and a membrane tank to solve at least one of the above technical problems.

[0006] In a first aspect, the application provides a gap filling structure of an insulation layer, which is arranged in a gap of an insulation layer of a film tank, the insulation layer comprising an inner plywood layer, a polyurethane layer and an outer plywood layer arranged in sequence, and the gap of the insulation layer comprising a gap formed between polyurethane blocks constituting the polyurethane layer; the gap filling structure of the insulation layer comprising a U-shaped filling structure arranged in the gap between the polyurethane blocks and bonded to the polyurethane blocks on both sides of the gap, the U-shaped filling structure sealing the gap between the polyurethane blocks and being capable of adapting to deformation of the gap between the polyurethane blocks.

[0007] In combination with the first aspect, in some optional embodiments, the gap between the polyurethane blocks is divided into a section close to the inner plywood layer and another section away from the inner plywood layer in a depth direction, and the U-shaped filling structure is arranged in the section close to the inner plywood layer.

[0008] In combination with the first aspect, in some optional embodiments, the U-shaped filling structure comprises a filler and a flexible film structure, the filler is made of an elastic insulation material, the flexible film structure is U-shaped and wraps the filler, and a surface of the flexible film structure opposite to the filler is bonded to the polyurethane blocks.

[0009] In combination with the first aspect, in some optional embodiments, a U-shaped bottom region of the flexible film structure has a surplus part for stretching.

[0010] In combination with the first aspect, in some optional embodiments, the U-shaped filling structure comprises a filler, the filler is made of an elastic insulation material and is folded into a U shape, and two side parts of the U-shaped filler are bonded to the polyurethane blocks.

[0011] In combination with the first aspect, in some optional embodiments, the gap filling structure of the insulation layer further comprises a sealing film, the sealing film covers one end of the U-shaped filling structure close to the inner plywood layer in the depth direction of the gap, and the sealing film is arranged along a width direction of the gap between the polyurethane blocks and is bonded to the polyurethane blocks on both sides of the gap.

[0012] In combination with the first aspect, in some optional embodiments, a substrate is arranged on a surface of the polyurethane block bonded to the U-shaped filling structure, and the substrate is made of a bonding material.

[0013] In a second aspect, the application provides an insulation module of a corner region, comprising: an external structure comprising a polyurethane layer and an outer plywood layer connected to each other; an internal structure comprising a corner region metal plate layer and an inner plywood layer connected to each other; and the gap filling structure of the insulation layer in any one of the embodiments of the first aspect; wherein the external structure and the internal structure are connected by bonding the polyurethane layer and the inner plywood layer.

[0014] In a third aspect, the present application provides an insulating layer structure, comprising: the insulating layer gap filling structure in any one of the embodiments of the first aspect; a plurality of the corner insulation modules in the second aspect; and a plurality of the planar insulation modules; wherein the plurality of the corner insulation modules and the plurality of the planar insulation modules are spliced together, and gaps are formed between adjacent corner insulation modules, between adjacent planar insulation modules, and between the corner insulation modules and the planar insulation modules, and the insulating layer gap filling structure is arranged in the gaps.

[0015] In a fourth aspect, the present application provides a thin-film tank, comprising the insulating layer structure in the third aspect.

[0016] Based on the above technical solutions, the insulating layer gap filling structure, the corner insulation module, the insulating layer, and the thin-film tank provided by the present application can realize the sealing of the gap between the polyurethane blocks by arranging the U-shaped filling structure in the gap between the polyurethane blocks of the polyurethane layer and bonding the U-shaped filling structure with the polyurethane blocks on both sides of the gap, and can adapt to the deformation of the gap between the polyurethane blocks, thereby preventing the leakage of liquefied natural gas through the gap of the insulating layer. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of an insulating layer of a thin-film tank in the prior art.

[0019] Figure 2 It is a schematic diagram of the structure of a corner insulation module provided by the embodiments of the present application.

[0020] Figure 3 It is an exploded schematic diagram of the structure of a corner insulation module provided by the embodiments of the present application.

[0021] Figure 4 It is a schematic diagram of the structure of a U-shaped filling structure provided by the embodiments of the present application.

[0022] Figure 5 It is a schematic diagram of another U-shaped filling structure provided by the embodiments of the present application.

[0023] Figure 6 It is a schematic diagram of still another U-shaped filling structure provided by the embodiments of the present application.

[0024] Figure 7A schematic view of a hole position of an angle area insulation module in the prior art.

[0025] Figure 8 A schematic view of an angle area insulation module provided by an embodiment of the present application. Figure 7 A schematic view of the same position.

[0026] Figure 9 A schematic view of adjacent arrangement of an angle area insulation module provided by an embodiment of the present application.

[0027] Figure 10 An exploded structural schematic view of a gap filling structure of an insulation layer between angle area insulation modules provided by an embodiment of the present application.

[0028] Reference signs: 1', angle area insulation box; 11', insulation box; 12', insulation filling block; 2', planar insulation box; A, first gap; A1, first gap section; A11, first sub-section; A12, second sub-section; A2, second gap section; B, second gap; B1, third gap section; B2, fourth gap section; C, third gap; 10, angle area insulation module; 11, polyurethane layer; 111, polyurethane block; 12, outer plywood layer; 121, outer plywood; 13, angle area metal plate layer; 14, inner plywood layer; 141, inner plywood; 20, gap filling structure of insulation layer; 21, first U-shaped filling structure; 211, first filler; 212, first flexible film structure; 2121, excess part; 22, second filler; 23, third filler; 24, second U-shaped filling structure; 241, fourth filler; 242, second flexible film structure; 25, fifth filler; 26, sealing film; 27, base material. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be described in detail in the following with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the description of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work, shall fall within the scope of protection of the present application.

[0030] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connection", "arrangement", "installation" and the like shall be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The terms "upper", "lower", "left", "right", "front", "rear", "center", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the application is used, and are only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] The terms "first", "second", "third", and the like are merely intended to distinguish similar elements, and do not indicate or imply relative importance or a particular order, unless otherwise explicitly specified and limited.

[0033] The terms "include", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0034] The term "a plurality of" means two or more (including two).

[0035] The term "and / or" is a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone.

[0036] The terms "in some embodiments", "as an example", "in an embodiment" and the like describe that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example can be included in at least one embodiment or example of the present application. The illustrative description of such terms does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. Embodiments in the present application and features in the embodiments can be combined in a suitable manner without conflict.

[0037] The embodiment of the present application provides a kind of heat insulation layer gap filling structure 20, the heat insulation layer gap filling structure 20 is applied to the gap in the heat insulation layer of film tank, gap includes at least one of first gap A and second gap B, wherein, first gap A is the gap between the insulating box of corner insulation module 10, second gap B is the gap between adjacent corner insulation module 10, between adjacent plane insulation module or between corner insulation module 10 and plane insulation module.

[0038] The application of heat insulation layer gap filling structure 20 in first gap A is specifically described below in combination with the structure of a corner insulation module 10.

[0039] As Figure 2 And Figure 3 The embodiment of the present application provides a kind of corner insulation module 10 for being arranged in two-face corner of film tank heat insulation layer, which includes external structure and internal structure. Specifically, the external structure includes connected polyurethane layer 11 and outer plywood layer 12, the polyurethane layer 11 includes two polyurethane blocks 111, two polyurethane blocks 111 correspond to two faces of two-face corner respectively and first gap section A1 is formed between them, the outer plywood layer 12 includes two outer plywood 121, two outer plywood 121 correspond to two faces of two-face corner respectively and are connected with two polyurethane blocks 111 respectively;The internal structure includes connected corner metal plate layer 13 and inner plywood layer 14, the inner plywood layer 14 includes two inner plywood 141, two inner plywood 141 correspond to two faces of two-face corner respectively and second gap section A2 is formed between them;The external structure and internal structure are connected by the adhesion of polyurethane layer 11 and inner plywood layer 14, and the corner insulation module 10 is formed.

[0040] Wherein, first gap section A1 and second gap section A2 jointly constitute first gap A. First gap section A1 is divided into first subsection A11 close to second gap section A2 (or inner plywood layer 14) and second subsection A12 away from second gap section A2 (or inner plywood layer 14) in depth direction, the width of first subsection A11 is greater than the width of second subsection A12, and step structure corresponding to first subsection A11 and second subsection A12 is formed on two polyurethane blocks 111.

[0041] The insulation layer gap filling structure 20 includes a first U-shaped filling structure 21 disposed within the first sub-segment A11. The first U-shaped filling structure 21 is bonded to the polyurethane blocks 111 on both sides of the first sub-segment A11, and can adapt to the gap deformation of the first sub-segment A11 (including expansion and contraction), thereby sealing the first sub-segment A11 and preventing airflow convection in the first sub-segment A11, thus preventing liquefied natural gas from leaking through the first sub-segment A11. Since the first sub-segment A11 is part of the first gap A, in other words, the first U-shaped filling structure 21 can prevent liquefied natural gas from leaking through the first gap A.

[0042] In some embodiments, such as Figure 4 and Figure 5 As shown, the first U-shaped filling structure 21 includes a first filler 211 and a first flexible membrane structure 212. The first filler 211 is made of glass wool, elastic felt, or other elastic insulating materials with good thermal insulation properties, low-temperature resistance, and compressibility and resilience. The first filler 211 can be a single-layer structure (see...). Figure 4 It can also be a multi-layered structure (see...) Figure 5 ), Figure 5 The first filler 211 shown is two-layered. The first flexible membrane structure 212 is made of fiberglass cloth or other materials with certain strength, elasticity, low-temperature resistance, and sealing performance. The first flexible membrane structure 212 wraps around the first filler 211 in a U-shape and can be fixed with door nails, glued, or connected to the first filler 211 by other means. The first flexible membrane structure 212 is bonded to the polyurethane blocks 111 on both sides of the first sub-segment A11. The process of installing the first U-shaped filler structure 21 into the first sub-segment A11 is as follows: first, apply glue to the surface of the first flexible membrane structure 212 facing away from the first filler 211, and then insert the first U-shaped filler structure 21 into the first sub-segment A11, so that the surface of the first flexible membrane structure 212 facing away from the first filler 211 is bonded to the polyurethane blocks 111 on both sides of the first sub-segment A11.

[0043] When the first flexible membrane structure 212 is connected to the first filler 211, a margin 2121 is reserved for its own stretching. For example, the margin 2121 is the part corresponding to the U-shaped bottom of the first flexible membrane structure 212. The margin 2121 can be unfolded when the gap of the first segment A11 widens, thereby avoiding the first flexible membrane structure 212 from cracking, tearing or other forms of damage due to excessive stretching.

[0044] In some embodiments, such as Figure 6As shown, the first U-shaped filling structure 21 comprises the first filler 211 described above, the first filler 211 is folded into a U-shape, and the first filler 211 is bonded with the polyurethane blocks 111 on both sides of the first sub-section A11. The process of installing the first U-shaped filling structure 21 to the first sub-section A11 is as follows: first, apply glue to one side of the first filler 211, then press the first filler 211 into the first sub-section A11, so that the first filler 211 is folded into a U-shape in the first sub-section A11, and the two side portions of the U-shaped first filler 211 are bonded with the polyurethane blocks 111 on both sides of the first sub-section A11, respectively.

[0045] In addition to the first U-shaped filling structure 21 described above, as shown in Figure 2 and Figure 3 , the heat insulation gap filling structure 20 further comprises a second filler 22 arranged in the second sub-section A12 and a third filler 23 arranged in the second gap section A2. The second filler 22 and the third filler 23 are both made of glass wool, elastic felt or other elastic insulation materials with good heat insulation performance, low temperature resistance and compressibility and resilience. The second filler 22 and the third filler 23 together with the first U-shaped filling structure 21 realize the sealing of the first gap A, preventing the liquefied natural gas from leaking cold through the first gap A.

[0046] It is worth noting that, since the corner insulation module 10 is divided into an outer structure and an inner structure, the outer structure and the inner structure are connected by bonding the polyurethane layer 11 and the inner plywood layer 14, compared with the corner insulation box 1' in the prior art (for comparison Figure 7 and Figure 8 ), the polyurethane layer 11, the outer plywood layer 12 and the inner plywood layer 14 do not need to be provided with stud mounting holes to be connected with the corner metal plate layer 13 by studs, thereby avoiding the generation of the third gap C (see Figure 7 ), which is the gap between the heat insulation filling block 12' and the stud mounting hole generated by the filling of the stud mounting hole of the heat insulation filling block 12', and preventing the liquefied natural gas from leaking cold through the third gap C.

[0047] In addition, a film layer (not shown in the figure) can be arranged between the polyurethane layer 11 and the inner plywood layer 14, the film layer is made of glass cloth or other materials with certain strength, elasticity, low temperature resistance and sealing performance, and can be connected with one of the polyurethane layer 11 and the inner plywood layer 14 by means of door nails, bonding or other ways, and then bonded with the other one of the polyurethane layer 11 and the inner plywood layer 14 by glue. The film layer can enhance the sealing between the polyurethane layer 11 and the inner plywood layer 14, and improve the overall sealing performance and insulation performance of the corner insulation module 10.

[0048] It should be noted that the above embodiments provide the corner insulation module 10 of the two-corner area, and for those skilled in the art, the design of the first gap A and the gap filling structure 20 of the thermal insulation layer in the above embodiments can be applied to the corner insulation module of the three-corner area, which can produce the same technical effect, so here will not be repeated.

[0049] The application of the gap filling structure 20 of the thermal insulation layer to the second gap B between the adjacent corner insulation modules 10 will be described below.

[0050] As shown in Figure 9 , the application provides a structure of the adjacent corner insulation modules 10, the second gap B between the adjacent corner insulation modules 10 is divided into a third gap segment B1 and a fourth gap segment B2 in the depth direction, and the width of the third gap segment B1 is greater than that of the fourth gap segment B2. Wherein, the gap between the polyurethane layers 11 of the adjacent corner insulation modules 10 is divided into a third sub-segment and a fourth gap segment B2 in the depth direction, and the gap between the third sub-segment and the inner plywood layer 14 of the adjacent corner insulation module 10 together constitutes the third gap segment B1.

[0051] The gap filling structure 20 of the thermal insulation layer includes a second U-shaped filling structure 24 arranged in the third gap segment B1, the second U-shaped filling structure 24 is bonded with the polyurethane layer 11 and the inner plywood layer 14 on both sides of the third gap segment B1, which can adapt to the deformation (including expansion and contraction) of the gap of the third gap segment B1, realize the sealing of the third gap segment B1, thereby preventing the convection of the airflow in the third gap segment B1 and avoiding the leakage of the liquefied natural gas through the third gap segment B1. Since the third gap segment B1 is part of the second gap B, in other words, the second U-shaped filling structure 24 can prevent the leakage of the liquefied natural gas through the second gap B.

[0052] The second U-shaped filling structure 24 can have various forms: in some embodiments, as shown in Figure 10 , the second U-shaped filling structure 24 includes a fourth filler 241 and a second flexible film structure 242, the fourth filler 241 and the second flexible film structure 242 can be arranged as the first filler 211 and the first flexible film structure 212 (see Figure 4 and Figure 5 ) of the above-mentioned first U-shaped filling structure 21, which will not be repeated here; in some embodiments, the second U-shaped filling structure 24 includes a fourth filler 241, which can be arranged as the first filler 211 folded into a U shape in the above-mentioned first U-shaped filling structure 21 (see Figure 6 ), which will not be repeated here.

[0053] In addition to the second U-shaped filling structure 24, the gap filling structure 20 of the thermal insulation layer further comprises a fifth filler 25 arranged in the fourth gap segment B2. The fifth filler 25 is made of glass wool, elastic felt or other elastic insulation materials with good thermal insulation performance, low temperature resistance and compressibility and resilience. The fifth filler 25 cooperates with the second U-shaped filling structure 24 to seal the second gap B and prevent the liquefied natural gas from leaking through the second gap B.

[0054] In addition, in order to enhance the sealing performance of the gap filling structure 20 of the thermal insulation layer at the third gap segment B1, in some embodiments, as shown in Figure 10 the gap filling structure 20 of the thermal insulation layer further comprises a sealing film 26. The sealing film 26 is made of glass cloth or other materials with certain strength, elasticity, low temperature resistance and sealing performance. The sealing film 26 is arranged on the end of the second U-shaped filling structure 24 away from the fourth gap segment B2 (or close to the inner plywood layer 14), and is bonded to the polyurethane layers 11 on both sides along the width direction of the third gap segment B1. The sealing film 26 enhances the sealing performance of the gap filling structure 20 of the thermal insulation layer in the depth direction of the third gap segment B1.

[0055] It is worth noting that the sealing film 26 is not bonded to the second U-shaped filling structure 24 to avoid limiting the function of the second U-shaped filling structure 24 to adapt to the deformation of the gap.

[0056] In order to ensure that the second U-shaped filling structure 24 is effectively bonded to the side walls on both sides of the third gap segment B1, in some embodiments, a base material 27 is arranged on the side walls on both sides of the third gap segment B1. The base material 27 is made of aluminum foil, glass cloth or other materials that can be well combined with glue, so that the second U-shaped filling structure 24 can be firmly bonded to the base material 27 through glue. The base material 27 can also provide a bonding basis for the sealing film 26.

[0057] It should be noted that the sealing film 26 and the base material 27 described above can also be applied to the first gap A of the corner insulation module 10, which will not be described here.

[0058] It should be further noted that the above embodiments provide the application of the gap filling structure 20 of the thermal insulation layer to the second gap B between adjacent corner insulation modules 10. For those skilled in the art, the design of the second gap B and the gap filling structure 20 of the thermal insulation layer in the above embodiments can be applied to the second gap B between adjacent planar insulation modules and the second gap B between the corner insulation module 10 and the planar insulation module, which can produce the same technical effects, and therefore will not be described here.

[0059] The application further provides an insulating layer structure, which comprises a plurality of the corner insulation modules 10, the insulating layer gap filling structure 20, and a plurality of planar insulation modules. The plurality of corner insulation modules 10 and the plurality of planar insulation modules are spliced together, and the insulating layer gap filling structure 20 is arranged in the second gap B between adjacent corner insulation modules 10, between adjacent planar insulation modules, and between the corner insulation module 10 and the planar insulation module.

[0060] The application further provides a thin film tank, which comprises the insulating layer structure.

[0061] In summary, the insulating layer gap filling structure, the corner insulation module, the insulating layer, and the thin film tank provided by the application can prevent the liquefied natural gas from leaking through the gap of the insulating layer by arranging the U-shaped filling structure in the gap between the polyurethane blocks of the polyurethane layer, and the U-shaped filling structure is bonded to the polyurethane blocks on both sides of the gap to seal the gap between the polyurethane blocks and adapt to the deformation of the gap between the polyurethane blocks.

[0062] The above merely provides a specific implementation of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the application, and these should be covered in the protection scope of the application.

Claims

1. A gap-filling structure for an insulation layer, characterized in that, The insulation layer gap filling structure is used to fill the gaps in the insulation layer of the film tank. The insulation layer includes an inner plywood layer, a polyurethane layer, and an outer plywood layer arranged sequentially. The gaps in the insulation layer include gaps formed between the polyurethane blocks that make up the polyurethane layer. The insulation layer gap filling structure includes a U-shaped filling structure, which is disposed in the gaps between the polyurethane blocks and bonded to the polyurethane blocks on both sides of the gaps. The U-shaped filling structure seals the gaps between the polyurethane blocks and can adapt to the deformation of the gaps between the polyurethane blocks.

2. The insulation layer gap filling structure according to claim 1, characterized in that, The gap between the polyurethane blocks is divided into a section near the inner plywood layer and another section away from the inner plywood layer in the depth direction, and the U-shaped filling structure is disposed in the section near the inner plywood layer.

3. The insulation layer gap filling structure according to claim 1 or 2, characterized in that, The U-shaped filling structure includes a filler and a flexible membrane structure. The filler is made of an elastic insulating material. The flexible membrane structure wraps around the filler in a U-shape and is connected to the filler. The surface of the flexible membrane structure facing away from the filler is bonded to the polyurethane block.

4. The insulation layer gap filling structure according to claim 3, characterized in that, The U-shaped bottom region of the flexible membrane structure has a stretchable allowance.

5. The insulation layer gap filling structure according to claim 1 or 2, characterized in that, The U-shaped filling structure includes a filler made of an elastic insulating material and folded into a U-shape, with the two sides of the U-shape of the filler bonded to the polyurethane block.

6. The insulation layer gap filling structure according to claim 1, characterized in that, The insulation layer gap filling structure also includes a sealing film, which covers one end of the U-shaped filling structure near the inner plywood layer in the gap depth direction. The sealing film is arranged along the width direction of the gap between the polyurethane blocks and is bonded to the polyurethane blocks on both sides of the gap.

7. The insulation layer gap filling structure according to claim 1, characterized in that, The polyurethane block has a substrate on the surface that is bonded to the U-shaped filling structure, and the substrate is made of adhesive material.

8. A corner insulation module, characterized in that, include: The external structure includes an interconnected polyurethane layer and an outer plywood layer; The internal structure includes interconnected corner metal plate layers and inner plywood layers; as well as The insulation layer gap filling structure as described in any one of claims 1-7; The external structure and the internal structure are connected by bonding the polyurethane layer to the inner plywood layer.

9. A thermal insulation layer structure, characterized in that, include: The insulation layer gap filling structure as described in any one of claims 1-7; Multiple corner insulation modules as described in claim 8; as well as Multiple planar insulated modules; The corner insulation modules and the planar insulation modules are spliced ​​together, and gaps are formed between adjacent corner insulation modules, between adjacent planar insulation modules, and between corner insulation modules and planar insulation modules, and the gaps are filled with the heat insulation layer gap filling structure.

10. A film can, characterized in that, Including the insulation layer structure as described in claim 9.

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