A gap filling structure, film tank insulation box structure and film tank

Abstract

This invention relates to the field of thin-film can technology, and discloses a gap-filling structure, a thin-film can insulation box structure, and a thin-film can. The gap-filling structure includes a filling block, a baffle, and a plugging block. The baffle includes a central section and wings on both sides of the central section. The central section abuts against the filling block, and the distance between the ends of the two wings is greater than the width of the filling block. The plugging block is located above the baffle. This invention can effectively solve the problem of gaps re-forming between the insulation box and the filling material due to shrinkage in low-temperature environments, and can prevent cold leakage.

Description

Technical Field

[0001] This invention relates to the field of film can technology, and in particular to a gap filling structure, a film can insulation box structure, and a film can. Background Technology

[0002] Existing membrane tanks typically consist of an insulating box, a secondary shielding layer, a primary plywood layer, and a main shielding layer. The insulating box usually has a sandwich structure consisting of an upper plywood layer, a polyurethane layer, and a lower plywood layer, and there will inevitably be some gaps between different insulating boxes.

[0003] To prevent cold leakage at gaps, these gaps are typically filled with insulating materials such as glass wool. However, when the membrane tank contains cryogenic liquefied gas, the insulation box contracts due to cooling, causing the gaps to widen. Gaps may then reappear between the insulation box and the glass wool filling, leading to heat exchange and convection between the gas and these gaps, resulting in cold leakage and affecting the overall insulation performance of the membrane tank. Especially in extremely low temperatures, the insulation box material has a large coefficient of shrinkage, making it difficult for the filling material to maintain a tight seal with the insulation box, causing gaps to reappear and creating thermal bridges, significantly reducing the insulation effect of the membrane tank. Current technology lacks a filling structure that can adapt to material shrinkage and deformation in low-temperature environments while maintaining a good seal. In particular, there is a lack of a mechanism to provide continuous pressure to maintain tight contact between the filling material and the insulation box. This means that even well-filled gaps can reappear due to material shrinkage under extremely low temperatures, creating cold leakage points.

[0004] Therefore, it is urgent to propose a gap filling structure, a thin film tank insulation box structure, and a thin film tank to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to propose a gap filling structure, a thin film can insulation box structure, and a thin film can, which can effectively solve the problem of gaps being re-generated between the insulation box and the filling material due to shrinkage in low-temperature environments, and can prevent cold leakage.

[0006] To solve the above-mentioned technical problems, the present invention provides a gap filling structure, including a filling block, a baffle and a filling block;

[0007] The baffle includes a central portion and wings disposed on both sides of the central portion. The central portion abuts against the filling block. The distance between the ends of the two wings is greater than the width of the filling block, and the opposite sides of the two wings are respectively connected to the sides of the corresponding portion of the filling block. The filling block is located above the baffle.

[0008] Furthermore, the width of the baffle in its free state is greater than its width in its compressed state after installation.

[0009] Furthermore, the material of the filling block includes thermal insulation material.

[0010] Furthermore, the baffle has a V-shaped structure, and the side of the filling block that contacts the baffle is also V-shaped.

[0011] Furthermore, the baffle is made of a resilient, low-temperature resistant material.

[0012] Furthermore, the packing block includes a cross-shaped structure.

[0013] In addition, the present invention also proposes a thin film can insulation box structure, including a plurality of adjacently arranged insulation boxes and a gap filling structure as described above;

[0014] The insulation box includes an upper plywood, a polyurethane layer, and a lower plywood arranged from top to bottom;

[0015] There are gaps between multiple adjacent upper plywoods, between multiple adjacent polyurethane layers, and between multiple adjacent lower plywoods;

[0016] The filler block is disposed in the gap formed between multiple adjacent polyurethane layers and in the gap formed between multiple adjacent lower plywoods;

[0017] The side of the upper plywood is provided with a through groove, which corresponds to a through groove on another upper plywood; the two sides of the baffle pass through the two adjacent through grooves respectively;

[0018] The filling block is positioned at the intersection of multiple adjacent upper plywood panels.

[0019] Furthermore, the adjacent sides of the upper plywood are provided with the through grooves, and the multiple baffles are located in the through grooves to form a cross-shaped structure.

[0020] Furthermore, the filling block includes an upper filling block and a lower filling block; the lower filling block and the upper filling block are arranged from bottom to top within the gap; the joint position of the upper filling block does not coincide with the joint position of the lower filling block.

[0021] In addition, the present invention also proposes a thin film can, comprising a main shielding layer, a main plywood layer, a secondary shielding layer and a thin film can insulation box structure as described above, arranged in sequence.

[0022] Through the above technical solution, the present invention has the following beneficial effects:

[0023] By setting up a three-layer gap-filling structure consisting of a filler block, a baffle, and a plug, multiple heat-blocking layers are formed, effectively preventing cold leakage caused by the shrinkage of the insulation box in low-temperature environments. Secondly, the baffle abuts against the filler block in the middle. Since the width of the baffle in its free state is greater than its width in its compressed state after installation, a pre-pressure is generated to continuously compress the filler block. Even if the filler block shrinks due to cold in low-temperature environments, the baffle can still maintain pressure on the filler block under the action of pre-pressure, preventing gaps from forming between the two and effectively blocking the heat leakage path.

[0024] Furthermore, the filler blocks directly fill the gaps and employ a stepped structure that is wider at the top and narrower at the bottom, preventing vertical connection between the insulation box and the filler blocks and thus blocking gas convection within the gaps. Baffles are positioned above the gaps, with their wings penetrating the adjacent upper plywood and their center abutting against the filler blocks. Stuffing blocks are placed at the intersections and above the baffles. The filler blocks are also arranged in staggered layers. These measures work together to form a complete three-dimensional sealing system, significantly improving the insulation effect.

[0025] Furthermore, the flexible V-shaped structure of the baffle and the cross-shaped packing block design solve the problem of gap sealing caused by material shrinkage in low-temperature environments. In particular, the flexible design of the baffle allows it to adaptively adjust the pressure according to temperature changes, maintaining a continuous compression effect on the packing block; while the cross-shaped packing block effectively solves the problem of cold leakage points easily forming at the intersection of gaps, achieving all-round gap sealing and greatly improving the thermal insulation performance and service life of the membrane tank. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the gap filling structure in Embodiment 1 of the present invention;

[0027] Figure 2 This is a cross-sectional view of the gap-filling structure in Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the overall structure of the gap filling structure in Embodiment 1 of the present invention;

[0029] Figure 4 This is a schematic diagram of the arrangement of different layers of filling blocks in the gap filling structure of Embodiment 1 of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall structure of the thin-film can insulation box in Embodiment 2 of the present invention;

[0031] Figure 6 This is a cross-sectional view of the thin-film can in Embodiment 2 of the present invention;

[0032] Figure 7 This is a partial structural diagram of the thin-film tank in Embodiment 2 of the present invention.

[0033] In the diagram, 1 is the filler block; 11 is the upper filler block; 12 is the lower filler block; 2 is the baffle; 3 is the plug; 4 is the upper plywood; 41 is the slot; 5 is the polyurethane layer; 6 is the lower plywood; 7 is the gap; and 8 is the secondary shielding layer.

[0034] 101. Filling material; 201. Cover plate; 601. First gap; 701. Second gap; 801. First clearance; 901. Second clearance. Detailed Implementation

[0035] Based on the teachings of this specification, those skilled in the art can form new technical solutions by combining different implementation methods without creating technical contradictions. Such variations should be considered to fall within the protection scope of this patent.

[0036] The following description, in conjunction with the accompanying drawings, provides a more detailed account of a gap-filling structure, a film can insulation box structure, and a film can according to the present invention, illustrating preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0037] The invention is described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0038] Example

[0039] like Figures 1-4 As shown, this embodiment of the invention proposes a gap filling structure, including a filling block 1, a baffle 2, and a filling block 3. Specifically, the baffle 2 includes a central portion and wings disposed on both sides of the central portion. The central portion abuts against the filling block 1, and the distance between the ends of the two wings is greater than the width of the filling block 1. The filling block 3 is located above the baffle 2.

[0040] More specifically, the filler block 1 is disposed within the gap 7 formed between adjacent polyurethane layers 5; the baffle 2 passes through adjacent upper plywood 4 and is located above the gap 7; the baffle 2 abuts against the filler block 1; and the plug block 3 is disposed at the intersection formed above the plurality of upper plywood 4 and is located above the baffle 2. This three-layer gap 7 filling structure can form multiple heat-blocking layers, thereby improving the insulation effect and reducing heat loss in low-temperature environments.

[0041] In this embodiment, the middle part of the baffle 2 can be configured to have a width slightly larger than the width of the gap 7 so as to completely cover the gap 7; the wing is configured to be able to pass through the groove 41 of the upper plywood 4.

[0042] Preferably, the width of the baffle 2 in its free state is greater than its width in its compressed state after installation, wherein the baffle 2 is in its compressed state when it is located within the slot 41. For example, the width of the baffle 2 in its free state is greater than the width between the slots 41 of adjacent upper plywood 4. Specifically, the width of the baffle 2 can be 5% to 15% larger than the width between the slots 41. When the baffle 2 passes through the slot 41, it will produce a certain amount of elastic deformation, which can increase the contact pressure between the baffle 2 and the slot 41, thereby improving the sealing effect. Furthermore, when the baffle 2 is installed in place, because the width of the baffle 2 is greater than the spacing between the slots 41, the baffle 2 will generate pre-compression stress. This pre-compression stress allows the baffle 2 to continuously and tightly abut against the filler block 1, maintaining a good compression effect even when the material shrinks in a low-temperature environment.

[0043] In a specific example, the width of the middle section can be 1.1 to 1.3 times the width of the gap 7, so that the middle section has sufficient contact area with the filling block 1, thereby enhancing the sealing effect.

[0044] Preferably, the baffle 2 has a V-shaped structure, and the side of the filling block 3 that contacts the baffle 2 is also V-shaped, meaning that the inner sides of the two opposing wings of the baffle 2 respectively fit against the two lower surfaces of the filling block 3; the V-shaped structure facilitates a better fit between the filling block 3 and the baffle 2. Specifically, the baffle 2 with the V-shaped structure forms a downward V-shape in the middle, and the wings on both sides extend upward.

[0045] In this embodiment, after the V-shaped baffle 2 is installed, the apex of the V-shape presses against the filler block 1, forming a point contact. As the temperature decreases and the material shrinks, the V-shaped structure presses down further, maintaining pressure on the filler block 1 and improving adaptability in low-temperature environments. In a specific example, the angle of the V-shaped structure can be designed between 120° and 150°, which ensures sufficient elasticity without affecting the strength of the baffle 2 due to an excessively small angle.

[0046] In one embodiment, the baffle 2 is made of an elastic, low-temperature resistant material. Specifically, the baffle 2 can be made of a low-temperature elastic plastic, an elastic metal, or a composite material. In a specific example, polytetrafluoroethylene (PTFE) can be used, which retains a certain degree of elasticity in low-temperature environments and has good low-temperature resistance, with an operating temperature range of -196°C to +260°C. Those skilled in the art will understand that the material of the baffle 2 can be set according to actual needs, and the material of the baffle 2 also includes other embodiments besides this one.

[0047] Preferably, the plugging block 3 includes a cross-shaped structure. Specifically, the cross-shaped plugging block 3 is designed to adapt to the shape of the intersection of the upper plywood 4, and can completely cover the space formed at the intersection. In this embodiment, the cross-shaped plugging block 3 is installed at the intersection, which precisely covers the intersection of the four gaps 7, forming a complete three-dimensional seal and preventing heat leakage at the intersection. In a specific example, the central part of the cross-shaped plugging block 3 can be set to be slightly thicker than the surrounding area, which can improve the sealing effect of the central part and improve the overall thermal insulation performance. When the V-shaped baffle 2 contracts due to cold, the cross-shaped plugging block 3 and the baffle 2 can still maintain a complete seal.

[0048] In one embodiment, the material of the filling block 1 includes a thermal insulation material. Specifically, the thermal insulation material can be glass wool, rock wool, polyurethane foam, or other materials with good thermal insulation properties. In a specific example, the thermal conductivity of the thermal insulation material can be lower than a set value, thereby improving the thermal insulation performance of the filling block 1. Those skilled in the art will understand that the material of the filling block 1 can be set according to actual needs, and the material of the filling block 1 also includes other embodiments besides this one.

[0049] In addition, continue to refer to Figures 1-4 As shown, this embodiment also proposes a thin-film can insulation box structure, including multiple adjacent insulation boxes and a gap filling structure as described above.

[0050] Specifically, the insulation box includes an upper plywood 4, a polyurethane layer 5, and a lower plywood 6 arranged sequentially from top to bottom; gaps 7 are provided between multiple adjacent upper plywoods 4, between multiple adjacent polyurethane layers 5, and between multiple adjacent lower plywoods 6; a filler block 1 is disposed in the gaps 7 formed between multiple adjacent polyurethane layers 5 and between multiple adjacent lower plywoods 6; a through groove 41 is provided on the side of the upper plywood 4, and is correspondingly disposed with a through groove 41 on another upper plywood 4; the two sides of the baffle 2 pass through two adjacent through grooves 41 respectively; and a filler block 3 is disposed at the intersection of multiple adjacent upper plywoods 4.

[0051] In this embodiment, the adjacent sides of the upper plywood 4 are provided with the through grooves 41, and the multiple baffles 2 are located in the through grooves 41 to form a cross-shaped structure. Specifically, when the upper plywood 4 is arranged in a matrix, each upper plywood 4 has through grooves 41 on all four sides (the outermost side may not have through grooves 41), and the through grooves 41 of adjacent upper plywood 4 are correspondingly arranged. After the multiple baffles 2 pass through these through grooves 41, they form a crisscrossing grid structure on the plane, that is, a cross-shaped structure.

[0052] In this embodiment, the cross-shaped grid structure provides a complete planar seal for the entire insulation box structure. Combined with the filling block 1 and the plugging block 3, it can form a three-dimensional gap filling system, thereby significantly improving the overall thermal insulation effect.

[0053] Preferred, such as Figure 4 As shown, the filler block 1 includes an upper filler block 11 and a lower filler block 12; the lower filler block 12 and the upper filler block 11 are arranged from bottom to top within the gap 7. The joint position of the upper filler block 11 does not coincide with the joint position of the lower filler block 12, that is, the upper filler block 11 and the lower filler block 12 are arranged in a staggered manner, so that the joint of one layer of filler block 1 is covered by the other layer of filler block 1, which can enhance the sealing performance of the gap 7 and reduce the formation of thermal bridges.

[0054] In a specific example, the upper filler block 11 and the lower filler block 12 can be arranged alternately along the length of the gap 7. The joint position of the upper filler block 11 corresponds to the middle of the lower filler block 12, and the joint position of the lower filler block 12 corresponds to the middle of the upper filler block 11. This arrangement can improve the overall sealing effect.

[0055] Furthermore, this embodiment also proposes a thin-film canister, comprising a main shielding layer, a main plywood layer, a secondary shielding layer 8, and a thin-film canister insulation box structure as described above, arranged sequentially. The main shielding layer and the secondary shielding layer 8 provide airtightness and liquid tightness, the main plywood layer provides support, and the thin-film canister insulation box structure provides thermal insulation. The gap 7 filling structure of this embodiment is applied to the insulation box structure, improving the overall thermal insulation performance of the thin-film canister and reducing the evaporation loss of liquefied gas.

[0056] In this embodiment, firstly, a filler block 1 is placed in the gap 7 between adjacent polyurethane layers 5; then, a baffle 2 is passed through the groove 41 of the adjacent upper plywood 4, so that the baffle 2 is positioned above the gap 7 and abuts against the filler block 1; finally, a filler block 3 is placed at the intersection formed above the upper plywood 4, so that the filler block 3 is positioned above the baffle 2. When using upper and lower filler blocks 12, they should be placed sequentially from bottom to top in the gap 7, so that the seam of the upper filler block 11 is staggered with the seam of the lower filler block 12, forming a staggered structure. The installation of the baffle 2 requires pressing the wing inward, inserting it into the groove 41, and then releasing it, using elastic recovery to form a snap-fit ​​fixation. The filler block 3 only needs to be aligned with the intersection and lightly pressed into place. Then, the secondary shielding layer 8 is laid on the surface of the insulation box structure, covering all insulation boxes and their gaps 7; then the main layer plywood is laid on the secondary shielding layer 8; finally, the main shielding layer is laid on the main layer plywood to form a complete thin film tank structure.

[0057] Example

[0058] like Figures 5-7 As shown, an embodiment of the present invention proposes a thin-film can insulation box structure, including multiple secondary insulation boxes, filling material 101 and cover plate 201.

[0059] Specifically, the secondary insulation box includes an upper plywood 4, a polyurethane layer 5, and a lower plywood 6 arranged sequentially. A gap is formed between the polyurethane layers 5 of adjacent secondary insulation boxes, with the upper width of the gap being greater than the lower width. A filling material 101 is disposed within the gap. The cover plate 201 is connected to the upper surface of the adjacent upper plywood 4 on both sides and is located above the filling material 101. Those skilled in the art will understand that the dimensions of the secondary insulation box can be set according to actual needs. This structural arrangement forms a complete heat-blocking system. The filling material 101, which is wider at the top and narrower at the bottom, is disposed within the gap between adjacent polyurethane layers 5, effectively preventing the generation of thermal bridges and better blocking the channel for heat transfer from the top to the bottom, thus improving the overall insulation effect.

[0060] In one embodiment, the filling material 101 includes an upper filling material and a lower filling material, which are respectively filled in the upper part and the lower part of the gap. This layered filling arrangement forms a double barrier to heat transfer. The upper filling material is filled in the wider first gap 601, and the lower filling material is filled in the narrower second gap 701, which together block the path of heat transfer and effectively reduce heat exchange in the vertical direction.

[0061] Preferably, the density of the upper filling material is lower than that of the lower filling material. Those skilled in the art will understand that the density of the filling material 101 can be set according to actual needs. This density difference setting gives the upper filling material better elasticity and a lower thermal conductivity, enabling it to more effectively block heat transfer from the upper layer, while the lower filling material provides better support and sealing performance, forming a thermal insulation system with a gradually changing thermal conductivity gradient, further improving the overall thermal insulation effect.

[0062] In this embodiment, the filling material 101 includes a thermal insulation material. Specifically, the thermal insulation material can be a material with good thermal insulation properties, such as glass wool, mineral wool, or polyurethane foam. In a specific example, glass wool is selected as the filling material 101 because its low thermal conductivity helps to improve the overall thermal insulation performance of the structure and further blocks heat transfer within the gaps.

[0063] Preferably, the cover plate 201 is made of a low-temperature resistant soft material. Those skilled in the art will know that the material and thickness of the cover plate 201 can be set according to actual needs. As the uppermost sealing structure, the cover plate 201 not only seals the gaps but also provides an additional heat insulation layer, further blocking the transfer of heat from the external environment to the interior of the gaps.

[0064] In this embodiment, the width of the cover plate 201 is greater than the width of the gap, allowing the cover plate 201 to fully cover the gap and form a reliable connection with the upper plywood 4 on both sides. This arrangement increases the contact area between the cover plate 201 and the upper plywood 4, improving the strength and sealing performance of the connection, forming a larger area of ​​thermal barrier, and reducing the range of thermal bridging effects. More importantly, this width setting provides sufficient expansion and contraction margin for the cover plate 201. In low-temperature environments, the secondary insulation box may shrink due to temperature changes. The extra width of the cover plate 201 can accommodate this shrinkage deformation, preventing the cover plate 201 from being stretched and damaged due to the shrinkage of the insulation box, thereby maintaining its function of blocking airflow. In a specific example, when the secondary insulation box shrinks at extremely low temperatures, the cover plate 201 can still maintain complete coverage of the gap, thus ensuring that the sealing performance of the entire system is not affected.

[0065] In one embodiment, the polyurethane layer 5 comprises multiple layers. A first gap 601 is formed between a portion of the polyurethane layers 5 adjacent to the secondary insulation box, and a second gap 701 is formed between another portion of the polyurethane layers 5 adjacent to the secondary insulation box. The width of the first gap 601 is greater than that of the second gap 701. By designing the polyurethane layer 5 as a multi-layer structure and forming first gaps 601 and second gaps 701 of different widths between different portions of the polyurethane layers 5 adjacent to the secondary insulation box, a multi-level thermal barrier system is constructed. The design that the width of the first gap 601 is greater than that of the second gap 701 makes the heat transfer path exhibit a "wide-narrow" variation characteristic, increasing the difficulty of heat transfer. The multi-layer polyurethane structure not only improves the overall thermal insulation performance but also allows the gaps between the layers to be staggered, avoiding the formation of direct heat transfer channels, effectively reducing the thermal bridging effect, and improving the overall thermal insulation effect of the structure.

[0066] In another embodiment, for example, when the polyurethane layer 5 is a single layer, the polyurethane layer 5 includes an upper part and a lower part, the upper part and the lower part being integrally connected; a first gap 601 is formed between the upper parts of adjacent secondary insulation boxes, and a second gap 701 is formed between the lower parts of adjacent secondary insulation boxes, the width of the first gap 601 being greater than the width of the second gap 701. Dividing the polyurethane layer 5 into an upper and lower part, and designing a first gap 601 between the upper parts of adjacent secondary insulation boxes and a second gap 701 between the lower parts, creates a gradient gap structure that is wider at the top and narrower at the bottom. This structure requires heat to pass through a channel with a constantly changing cross-sectional area during transfer, greatly increasing thermal resistance. At the same time, this design also facilitates construction and installation; the wider upper gap facilitates the placement of the filling material 101, while the narrower lower gap ensures the structural stability and sealing performance, achieving a perfect combination of ease of construction and thermal insulation performance.

[0067] In this second embodiment, when the gap (i.e., the gap formed between the polyurethane layers 5 of adjacent secondary insulation boxes) is stepped, a first gap 801 is formed between adjacent upper plywood 4; the first gap 801, the first gap 601, and the second gap 701 are sequentially connected, and the width of the first gap 601 is greater than that of the first gap 801. By setting the structure where the first gap 801 between adjacent upper plywood 4 is sequentially connected to the first gap 601 and the second gap 701, and the width of the first gap 601 is greater than that of the first gap 801, a "narrow-wide-narrow" heat transfer maze is formed. This structure first restricts heat entry through the narrower first gap 801, then disperses heat in the wider first gap 601 and absorbs it through the filling material 101, and finally further blocks heat transfer through the narrower second gap 701. This multi-stage changing cross-sectional design significantly extends the heat transfer path, increases thermal resistance, and also enhances the airtightness of the entire structure, preventing the convection of hot and cold air in low-temperature environments, and further improving the insulation effect.

[0068] In this second embodiment, when the gap (i.e., the gap formed between the polyurethane layers 5 of adjacent secondary insulation boxes) is stepped, a second gap 901 is provided between adjacent lower plywood 6; the width of the second gap 901 is the same as the width of the second gap 701; the filling material 101 is also disposed within the second gap 901. By providing a second gap 901 with the same width as the second gap 701 between adjacent lower plywood 6, and also providing filling material 101 therein, a complete and closed heat barrier system is formed. This arrangement ensures that the entire heat transfer path from the upper plywood 4 to the lower plywood 6 has corresponding barrier measures, avoiding any possible thermal bridges. In particular, the setting that the width of the second gap 901 is consistent with the width of the second gap 701 makes the heat transfer path continuous and consistent, avoiding the heat concentration phenomenon that may occur due to abrupt changes in cross-section, making the entire insulation system more balanced and efficient.

[0069] The stepped design of the gaps can accommodate more low-density filling material, increasing the resistance to heat transfer. At the same time, the lower part remains narrow, allowing for the filling of high-density material, forming a gradient structure with gradually changing insulation performance, thereby effectively blocking the vertical transfer of heat within the gaps.

[0070] In addition, continue to refer to Figure 7 As shown, this embodiment also proposes a thin-film can, including a main shielding layer, a main plywood layer, a secondary shielding layer 8, and a thin-film can insulation box structure as described above, arranged in sequence.

[0071] In this embodiment, cryogenic liquefied gas is first stored inside a membrane tank. A secondary insulating box structure provides basic insulation, and its gap-filling structure effectively blocks heat transfer within the gaps. A secondary shielding layer 8 provides initial insulation, a primary plywood layer provides structural support, and a primary shielding layer provides final insulation, all working together to ensure the safe storage of cryogenic liquefied gas. This multi-layered insulation system, with each layer having its specific insulation function, collectively forms a highly efficient heat-blocking system.

[0072] Therefore, this embodiment forms a highly efficient heat-blocking system by placing a top-wide, bottom-narrow filling material 101 in the gaps between adjacent polyurethane layers 5, and using filling materials 101 of different densities. The top-wide, bottom-narrow design lengthens the heat transfer path and increases the resistance to heat transfer; the use of filling materials 101 of different densities creates a thermal conductivity gradient insulation system, further improving the insulation effect. The cover plate 201 not only seals the gaps but also provides an additional insulation layer, further blocking the heat transfer path. The matrix arrangement of multiple secondary insulation boxes forms a complete heat-blocking network. Each gap adopts a top-wide, bottom-narrow structure and is filled with materials of different densities, which can disrupt the connectivity of heat transfer and reduce heat leakage. Components not labeled above are not shown in the figures for the sake of simplicity.

[0073] In practical applications, the gap-filling structure in Embodiment 1 can be combined with the thin-film tank insulation box structure in Embodiment 2 to form a more complete insulation system. Specifically, the filling block 1, baffle 2, and plugging block 3 structures from Embodiment 1 can be set in the gap that is wider at the top and narrower at the bottom in Embodiment 2, so that the advantages of the two can complement each other.

[0074] For example, the stepped gap in Embodiment 2 can be filled with the staggered filling block 1 of Embodiment 1, and a V-shaped baffle 2 with pre-pressure and a cross-shaped filling block 3 can be placed above the gap. This combination can both disrupt the heat transfer continuity by utilizing the stepped gap and ensure a tight fit between the filling material and the gap wall in a low-temperature environment through the pre-pressure mechanism, thus achieving good results in both preventing thermal bridge formation and accommodating material shrinkage.

[0075] In this combined implementation, the cover plate 201 of Embodiment 2 can be used in conjunction with the packing block 3 of Embodiment 1 to form a more reliable upper sealing system; while the V-shaped baffle 2 of Embodiment 1 can be used in conjunction with the stepped slit structure of Embodiment 2 to form a more efficient heat barrier mechanism.

[0076] This combined implementation not only has the advantages of each of the two embodiments, but also forms a more three-dimensional and multi-layered insulation system as a whole, further improving the insulation performance and service life of the membrane tank.

[0077] In summary, the gap-filling structure, thin-film can insulation box structure, and thin-film can proposed in this invention have the following advantages:

[0078] By setting up a three-layer gap-filling structure consisting of a filler block, a baffle, and a plug, multiple heat-blocking layers are formed, effectively preventing cold leakage caused by the shrinkage of the insulation box in low-temperature environments. Secondly, the baffle abuts against the filler block in the middle. Since the width of the baffle in its free state is greater than its width in its compressed state after installation, a pre-pressure is generated to continuously compress the filler block. Even if the filler block shrinks due to cold in low-temperature environments, the baffle can still maintain pressure on the filler block under the action of pre-pressure, preventing gaps from forming between the two and effectively blocking the heat leakage path.

[0079] Furthermore, the filler blocks directly fill the gaps and employ a stepped structure that is wider at the top and narrower at the bottom, preventing vertical connection between the insulation box and the filler blocks and thus blocking gas convection within the gaps. Baffles are positioned above the gaps, with their wings penetrating the adjacent upper plywood and their center abutting against the filler blocks. Stuffing blocks are placed at the intersections and above the baffles. The filler blocks are also arranged in staggered layers. These measures work together to form a complete three-dimensional sealing system, significantly improving the insulation effect.

[0080] Furthermore, the flexible V-shaped structure of the baffle and the cross-shaped packing block design solve the problem of gap sealing caused by material shrinkage in low-temperature environments. In particular, the flexible design of the baffle allows it to adaptively adjust the pressure according to temperature changes, maintaining a continuous compression effect on the packing block; while the cross-shaped packing block effectively solves the problem of cold leakage points easily forming at the intersection of gaps, achieving all-round gap sealing and greatly improving the thermal insulation performance and service life of the membrane tank.

[0081] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gap-filling structure, characterized in that, Includes filler blocks, baffles, and filler blocks; The baffle includes a central portion and wings disposed on both sides of the central portion. The central portion abuts against the filling block, and the distance between the ends of the two wings is greater than the width of the filling block. The filling block is located above the baffle. The baffle has a V-shaped structure, and the side of the filling block that contacts the baffle is also V-shaped. The packing block has a cross-shaped structure.

2. The gap-filling structure as described in claim 1, characterized in that, The width of the baffle in its free state is greater than its width in its compressed state after installation.

3. The gap-filling structure as described in claim 1, characterized in that, The filling block is made of insulating material.

4. The gap-filling structure as described in claim 1, characterized in that, The baffle is made of a resilient, low-temperature resistant material.

5. A membrane can insulation box structure, characterized in that, It includes a plurality of adjacently arranged insulating boxes and a gap-filling structure as described in any one of claims 1-4; The insulation box includes an upper plywood, a polyurethane layer, and a lower plywood arranged from top to bottom; There are gaps between multiple adjacent upper plywoods, between multiple adjacent polyurethane layers, and between multiple adjacent lower plywoods; The filler block is disposed in the gap formed between multiple adjacent polyurethane layers and in the gap formed between multiple adjacent lower plywoods; The side of the upper plywood is provided with a through groove, which corresponds to a through groove on another upper plywood; the two sides of the baffle pass through the two adjacent through grooves respectively; The filling block is positioned at the intersection of multiple adjacent upper plywood panels.

6. The membrane can insulation box structure as described in claim 5, characterized in that, The adjacent sides of the upper plywood are provided with the through grooves, and the multiple baffles are located in the through grooves to form a cross-shaped structure.

7. The membrane can insulation box structure as described in claim 6, characterized in that, The filling block includes an upper filling block and a lower filling block; the lower filling block and the upper filling block are arranged from bottom to top in the gap; the joint position of the upper filling block does not coincide with the joint position of the lower filling block.

8. A film can, characterized in that, It includes a main shielding layer, a main plywood layer, a secondary shielding layer, and a film can insulation box structure as described in any one of claims 5-7, arranged in sequence.

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