Thin film can insulation box structure and thin film can

Abstract

The invention relates to the technical field of thin film cans, and discloses a thin film can insulation box structure and a thin film can, the thin film can insulation box structure comprises a plurality of secondary insulation boxes, a filling material and a cover plate; the plurality of sub-layer insulation boxes are arranged and distributed in a matrix; the secondary layer insulation box comprises an upper plywood, a polyurethane layer and a lower plywood which are arranged in sequence; a gap is formed between the polyurethane layers of the adjacent secondary insulation boxes, and the width of the upper part of the gap is greater than that of the lower part; the filling material is arranged in the gap; the two sides of the cover plate are connected with the upper surfaces of the adjacent upper plywood correspondingly and located above the filling materials. According to the low-temperature liquefied gas storage tank, the gap sealing problem caused by shrinkage of the insulation box due to temperature change of an existing low-temperature liquefied gas storage tank in a low-temperature environment can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of film tanks, and in particular to a film tank insulation box structure and a film tank. Background Art

[0002] Existing membrane tanks typically consist of an insulation box, a secondary shielding layer, a primary plywood layer, and a primary shielding layer. The insulation box typically consists of a sandwich structure consisting of an upper plywood layer, a polyurethane layer, and a lower plywood layer, with certain gaps between the different insulation boxes.

[0003] To prevent cold leakage through the gaps, they are typically filled with insulating materials such as glass wool. However, when a membrane tank is filled with cryogenic liquefied gas, the insulation box contracts due to the cold, causing the gaps to widen. This can create new gaps between the insulation box and the glass wool filling, leading to heat exchange and convection between the gases in the gaps, causing cold leakage and compromising the overall insulation performance of the membrane tank.

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

[0005] The purpose of the present invention is to provide a membrane tank insulation box structure and a membrane tank, which can solve the gap sealing problem caused by the shrinkage of the insulation box due to temperature changes in the existing cryogenic liquefied gas storage tank in a low temperature environment.

[0006] In order to solve the above technical problems, the present invention provides a film tank insulation box structure, comprising a plurality of sub-layer insulation boxes, a filling material and a cover plate; The plurality of sub-layer insulation boxes are arranged in a matrix; the sub-layer insulation boxes include an upper plywood, a polyurethane layer, and a lower plywood arranged in sequence; a gap is formed between the polyurethane layers of adjacent sub-layer insulation boxes, and the upper width of the gap is greater than the lower width; the filling material is disposed in the gap; both sides of the cover plate are respectively connected to the upper surface of adjacent upper plywoods and are located above the filling material; The polyurethane layer comprises multiple layers, a first gap is formed between a portion of the polyurethane layers adjacent to the secondary insulation box, and a second gap is formed between another portion of the polyurethane layers adjacent to the secondary insulation box, and the width of the first gap is greater than the second gap; or The polyurethane layer includes an upper portion and a lower portion, the upper portion and the lower portion are integrally connected; a first gap is formed between the upper portions of adjacent sub-layer insulation boxes, and a second gap is formed between the lower portions of adjacent sub-layer insulation boxes, and the width of the first gap is greater than the second gap; A first gap is formed between adjacent upper plywoods; the first gap, the first slit and the second gap are connected in sequence, and the width of the first gap is greater than that of the first gap, forming a narrow-wide-narrow structure.

[0007] Furthermore, the filling material includes an upper filling material and a lower filling material, which are filled in the upper part of the gap and the lower part of the gap respectively.

[0008] Furthermore, the density of the upper filling material is smaller than the density of the lower filling material.

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

[0010] Furthermore, the cover plate has a V-shaped structure, including a middle part and wings arranged on both sides of the middle part, and the middle part abuts the filling material; the side of the upper plywood is provided with a through groove, and is arranged corresponding to the through groove on the other upper plywood; the two sides of the cover plate respectively pass through the two adjacent through grooves.

[0011] Furthermore, the material of the cover plate includes a low-temperature resistant soft material.

[0012] Furthermore, the width of the cover plate is greater than the width of the gap.

[0013] Furthermore, there is a second gap between adjacent lower plywood panels; and the filling material is also arranged in the second gap.

[0014] Furthermore, the width of the second gap is consistent with the width of the second slit.

[0015] In addition, the present invention also provides a film tank, comprising a primary shielding layer, a primary layer of plywood, a secondary shielding layer and the film tank insulation box structure as described above, which are arranged in sequence.

[0016] Through the above technical solution, the present invention has the following beneficial effects: Multiple sub-layer insulation boxes are arranged in a matrix. These boxes consist of an upper plywood, a polyurethane layer, and a lower plywood layer. Gaps are formed between the polyurethane layers of adjacent sub-layer insulation boxes, with the upper width of the gap being wider than the lower width. Filling material is placed within the gaps. Two sides of the cover plate are connected to the upper surfaces of adjacent upper plywood boards and rest on the filling material, effectively blocking heat transfer from the upper layer to the lower layer, preventing thermal bridges and enhancing overall insulation. The cover plate covers the gaps and connects to the upper plywood, forming a protective layer that prevents heat convection between the space above the gap and the gas within it. It also allows the insulation box to shrink and deform in low-temperature environments, preventing seal failure.

[0017] In addition, each gap of the present invention is arranged in a step-like (ie, ladder-like) shape, which can destroy the connectivity of heat transfer and reduce the heat leakage problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the membrane tank insulation box structure in Example 1 of the present invention; Figure 2 is a cross-sectional view of a film tank in Example 1 of the present invention; Figure 3 This is a partial structural diagram of a film tank in Example 1 of the present invention; Figure 4 Schematic diagram of the overall structure of the gap filling structure in the second embodiment of the present invention; Figure 5 is a cross-sectional view of a gap filling structure in a second embodiment of the present invention; Figure 6 Schematic diagram of the overall structure of the gap filling structure in the second embodiment of the present invention; Figure 7 Schematic diagram of the arrangement structure of filling blocks in different layers in the gap filling structure in the second embodiment of the present invention.

[0019] In the figure, 101, filling material; 201, cover plate; 4, upper plywood; 5, polyurethane layer; 6, lower plywood; 601, first gap; 701, second gap; 801, first gap; 8, secondary shielding layer; 901, second gap; 1. Filling block; 11. Upper filling block; 12. Lower filling block; 2. Baffle; 3. Filling block; 41. Groove; 7. Gap. DETAILED DESCRIPTION

[0020] Based on the teachings of this specification, those skilled in the art may form new technical solutions by cross-combining different implementation methods without generating technical contradictions. Such variations should be deemed to fall within the scope of protection of this patent.

[0021] The following description of a membrane tank insulation box structure and membrane tank according to the present invention is provided in greater detail with reference to the accompanying drawings. Preferred embodiments of the present invention are shown. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guideline for those skilled in the art and is not intended to limit the present invention.

[0022] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are provided solely for the purpose of assisting in the description of the embodiments of the present invention. Example

[0023] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a membrane tank insulation box structure, including a plurality of sub-layer insulation boxes, a filling material 101 and a cover plate 201.

[0024] Specifically, the sub-layer insulation box includes an upper plywood 4, a polyurethane layer 5, and a lower plywood 6, which are arranged in sequence. A gap is formed between the polyurethane layers 5 of adjacent sub-layer insulation boxes, and the upper width of the gap is greater than the lower width. The filling material 101 is disposed within the gap. The two sides of the cover plate 201 are respectively connected to the upper surface of the adjacent upper plywood 4 and are located above the filling material 101. Those skilled in the art will appreciate that the size of the sub-layer insulation box can be set according to actual needs. This structural arrangement can form a complete heat barrier system. The filling material 101, which is wider at the top and narrower at the bottom, is disposed in the gap between adjacent polyurethane layers 5. This can effectively prevent the generation of a thermal bridge effect, better block the channel for heat transfer from the top to the bottom, and improve the overall insulation effect.

[0025] In one embodiment, the filling material 101 includes an upper layer of filling material and a lower layer of filling material, which are respectively filled in the upper and lower parts of the gap. This layered filling arrangement forms a double barrier to heat transfer. The upper layer of filling material is filled in the first gap 601 with a larger width, and the lower layer of filling material is filled in the second gap 701 with a smaller width. Together, they block the heat transfer path and effectively reduce heat exchange in the vertical direction.

[0026] Preferably, the density of the upper filling material is lower than that of the lower filling material. Those skilled in the art will appreciate that the density of filling material 101 can be adjusted based on actual needs. This density difference provides the upper filling material with greater elasticity and lower thermal conductivity, more effectively blocking heat transfer from the upper portion, while the lower filling material provides better support and sealing properties, forming an insulation system with a gradually varying thermal conductivity gradient, further enhancing the overall insulation effect.

[0027] In this embodiment, the filling material 101 comprises a thermally insulating material. Specifically, the thermally insulating material may be glass wool, mineral wool, polyurethane foam, or other materials with excellent thermal insulation properties. In one specific example, glass wool is selected as the filling material 101 because of its low thermal conductivity, which helps improve the thermal insulation performance of the entire structure and further blocks heat transfer within the gap.

[0028] Preferably, the cover plate 201 is made of a low-temperature-resistant soft material. Those skilled in the art will appreciate that the material and thickness of the cover plate 201 can be adjusted based on actual needs. As the topmost sealing structure, the cover plate 201 not only seals the gap but also provides an additional insulation layer, further preventing heat transfer from the external environment into the gap.

[0029] In this embodiment, the width of the cover plate 201 is greater than the width of the gap, so that the cover plate 201 can 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, improves the firmness and sealing performance of the connection, can form a larger area of ​​thermal barrier, and reduce the scope of influence of the thermal bridge effect. More importantly, this width setting leaves sufficient expansion margin for the cover plate 201. In a low-temperature environment, the secondary insulation box may shrink due to temperature changes. The additional width of the cover plate 201 can adapt to this shrinkage deformation and prevent 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, so that the sealing performance of the entire system is not affected.

[0030] In one embodiment, the polyurethane layer 5 comprises multiple layers. A first gap 601 is formed between portions of the polyurethane layers 5 adjacent to the sub-insulating box, and a second gap 701 is formed between portions of the polyurethane layers 5 adjacent to the sub-insulating box. The width of the first gap 601 is greater than the width 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 varying widths between different portions of the polyurethane layers 5 adjacent to the sub-insulating box, a multi-stage thermal insulation system is constructed. The design of the first gap 601 being wider than the second gap 701 creates a "wide-to-narrow" heat transfer path, increasing the difficulty of heat transfer. This multi-layer polyurethane structure not only improves overall thermal insulation performance but also allows the gaps between the layers to be staggered, preventing the formation of direct heat transfer pathways. This effectively reduces thermal bridging and enhances the overall thermal insulation performance of the structure.

[0031] In another embodiment, for example, if the polyurethane layer 5 is a single layer, the polyurethane layer 5 comprises an upper portion and a lower portion, the upper portion and the lower portion being integrally connected. A first gap 601 is formed between the upper portions of adjacent sub-layer insulation boxes, and a second gap 701 is formed between the lower portions of adjacent sub-layer insulation boxes. The width of the first gap 601 is greater than the second gap 701. Dividing the polyurethane layer 5 into upper and lower portions, and forming the first gap 601 between the upper portions and the second gap 701 between the lower portions of adjacent sub-layer insulation boxes, creates a gradient gap structure that is wider at the top and narrower at the bottom. This structure forces heat transfer through a channel with a continuously changing cross-sectional area, significantly increasing thermal resistance. This arrangement also facilitates construction and installation. The wider upper gap facilitates the placement of the filling material 101, while the narrower lower gap ensures structural stability and sealing performance, achieving a perfect combination of construction convenience and thermal insulation performance.

[0032] In this first 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 panels 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 the first gap 801. By arranging the first gap 801, the first gap 601, and the second gap 701 between adjacent upper plywood panels 4 being sequentially connected, and the first gap 601 being wider than 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 (the first gap 801 is not filled with filler material 101, but only with air; its narrowness helps prevent excessive heat ingress). Heat is then dispersed in the wider first gap 601 and absorbed by the filler material 101. Finally, heat transfer is further blocked by the narrower second gap 701. This multi-level cross-sectional design significantly extends the heat transfer path and increases thermal resistance, while also enhancing the airtightness of the entire structure, preventing convection of cold and hot air in low-temperature environments and further improving the insulation effect.

[0033] In this first 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 panels 6; the width of the second gap 901 is consistent with the width of the second gap 701; and the filler 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 panels 6 and also disposing the filler material 101 therein, a complete and enclosed thermal insulation system is formed. This arrangement provides a corresponding barrier for the entire heat transfer path from the upper plywood 4 to the lower plywood 6, avoiding any potential thermal bridges. In particular, the consistency of the width of the second gap 901 with the second gap 701 ensures continuity and consistency in the heat transfer path, avoiding heat concentration that could result from sudden changes in cross-section, and making the entire insulation system more balanced and efficient.

[0034] The stepped setting of the gap can accommodate more low-density filling materials, increasing the resistance to heat transfer. At the same time, the lower part remains narrower and can be filled with high-density materials to form a gradient structure with gradually changing insulation properties, thereby effectively blocking the upward and downward transfer of heat in the gap.

[0035] In addition, continue to refer to Figure 3 As shown, this embodiment also provides a film tank, comprising a primary shielding layer, a primary plywood layer, a secondary shielding layer 8 and the film tank insulation box structure as described above, which are arranged in sequence.

[0036] In this embodiment, cryogenic liquefied gas is first stored within the 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, while the primary plywood layer provides structural support. The primary shielding layer provides final insulation, collectively ensuring the safe storage of cryogenic liquefied gas. This multi-layer insulation system, with each layer providing its own specific insulation function, forms a highly effective heat-blocking system.

[0037] Therefore, this embodiment forms an efficient heat barrier system by arranging a filling material 101 that is wide at the top and narrow at the bottom in the gaps between adjacent polyurethane layers 5, and using filling materials 101 of different densities to fill them separately. The setting of wide at the top and narrow at the bottom can lengthen the heat transfer path and increase the resistance to heat transfer; the use of filling materials 101 of different densities can form a heat insulation system with a gradient change in thermal conductivity, further improving the insulation effect. The use of the cover plate 201 not only seals the gaps, but also provides an additional insulation layer, further blocking the heat transfer path. The arrangement of multiple sub-layer insulation boxes arranged in a matrix forms a complete heat barrier network. Each gap adopts a structure that is wide at the top and narrow at the bottom and is filled with materials of different densities, which can destroy the connectivity of heat transfer and reduce heat leakage problems. The above-mentioned unnumbered components are not shown in the figure for the sake of simplicity of illustration. Example

[0038] like Figure 4-Figure 7 As shown, an embodiment of the present invention provides a gap filling structure, comprising a filling block 1, a baffle 2, and a filling block 3. Specifically, the baffle 2 comprises a central portion and wings disposed on either side of the central portion, the central portion abutting the filling block 1, and the distance between the ends of the two wings being greater than the width of the filling block 1; the filling block 3 is located above the baffle 2.

[0039] More specifically, the filler block 1 is positioned within the gap 7 formed between adjacent polyurethane layers 5; the baffle 2 is positioned to pass through adjacent upper plywood panels 4 and above the gap 7; the baffle 2 abuts the filler block 1; and the plugging block 3 is positioned at the intersection formed above the plurality of upper plywood panels 4 and above the baffle 2. This three-layer gap 7 filling structure creates multiple thermal barriers, thereby improving insulation and reducing heat loss in low-temperature environments.

[0040] In this embodiment, the middle portion 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; and the wing portion can be configured to pass through the groove 41 of the upper plywood 4.

[0041] Preferably, the width of the baffle 2 in a free state is greater than the width in a compressed state after installation, wherein the baffle 2 is in a compressed state when it is located in the through groove 41. For example, the width of the baffle 2 in a free state is greater than the width between the through grooves 41 of the adjacent upper plywood 4. Specifically, the width of the baffle 2 can be 5% to 15% greater than the width between the through grooves 41. When the baffle 2 passes through the through groove 41, a certain elastic deformation will occur, which can increase the contact pressure between the baffle 2 and the through groove 41, thereby improving the sealing effect. Furthermore, when the baffle 2 is installed in place, since the width of the baffle 2 is greater than the spacing between the through grooves 41, the baffle 2 will generate pre-compression stress. This pre-compression stress enables the baffle 2 to continuously and tightly abut the filling block 1, and even when the material shrinks in a low-temperature environment, it can maintain a good compression effect.

[0042] In a specific example, the width of the middle portion may be 1.1 to 1.3 times the width of the gap 7 , so that the middle portion and the filling block 1 have sufficient contact area to enhance the sealing effect.

[0043] Preferably, the baffle 2 has a V-shaped structure, and the side of the filling block 3 in contact with the baffle 2 is also V-shaped, that is, the inner side surfaces of the two wings of the baffle 2 that face each other are respectively in contact with the two lower surfaces of the filling block 3; and the V-shaped structure of the two facilitates a better fit between the filling block 3 and the baffle 2. Specifically, the middle portion of the V-shaped baffle 2 forms a downward V-shape, and the wings on both sides extend upward.

[0044] In this embodiment, after the V-shaped baffle 2 is installed, the apex of the V presses against the filler block 1, forming a point contact. As the temperature decreases and the material contracts, the V-shaped structure presses further downward, maintaining pressure on the filler block 1 and improving adaptability in low-temperature environments. In one specific example, the angle of the V-shaped structure can be designed between 120° and 150°, ensuring sufficient flexibility without compromising the strength of the baffle 2 due to a too-small angle.

[0045] 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 one specific example, polytetrafluoroethylene (PTFE) can be used, as it maintains a certain degree of elasticity in low-temperature environments and has excellent low-temperature resistance, with an operating temperature range of -196°C to +260°C. Those skilled in the art will appreciate that the material of the baffle 2 can be customized based on actual needs, and that the material of the baffle 2 may include other embodiments besides this embodiment.

[0046] Preferably, the filling block 3 includes a cross-shaped structure. Specifically, the filling block 3 with a cross-shaped structure 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 filling block 3 is installed at the intersection, just covering the intersection of the gaps 7 in four directions, and can form a complete three-dimensional blockage to prevent heat leakage at the intersection. In a specific example, the central part of the cross-shaped filling block 3 can be set to be slightly thicker than the surrounding area, so that the sealing effect of the central part can be improved, and the overall thermal insulation performance can be improved. Among them, when the baffle 2 of the V-shaped structure shrinks due to cold, the filling block 3 of the cross-shaped structure and the baffle 2 can still maintain a complete seal.

[0047] In one embodiment, the material of the filler block 1 includes an insulating material. Specifically, the insulating material may be glass wool, rock wool, polyurethane foam, or other materials with excellent insulating properties. In one specific example, the thermal conductivity of the insulating material can be lower than a set value, thereby improving the insulating performance of the filler block 1. Those skilled in the art will appreciate that the material of the filler block 1 can be set according to actual needs, and the material of the filler block 1 also includes other embodiments besides this embodiment.

[0048] In addition, continue to refer to Figure 4-Figure 7 As shown, this embodiment further provides a membrane tank insulation box structure, comprising a plurality of adjacently arranged insulation boxes and the gap filling structure as described above.

[0049] Specifically, the insulation box includes an upper plywood 4, a polyurethane layer 5 and a lower plywood 6 arranged in sequence from top to bottom; there are gaps 7 between multiple adjacent upper plywoods 4, between multiple adjacent polyurethane layers 5 and between multiple adjacent lower plywoods 6; the filling blocks 1 are arranged in the gaps 7 formed between multiple adjacent polyurethane layers 5 and in the gaps 7 formed between multiple adjacent lower plywoods 6; the side of the upper plywood 4 is provided with a through groove 41, and is arranged corresponding to the through groove 41 on the other upper plywood 4; the two sides of the baffle 2 respectively pass through the two adjacent through grooves 41; the filling block 3 is arranged at the intersection formed by multiple adjacent upper plywoods 4.

[0050] In this embodiment, the adjacent side surfaces of the upper plywood panels 4 are each provided with the through-slots 41, and the multiple baffles 2 are positioned within the through-slots 41 to form a cross-shaped structure. Specifically, when the upper plywood panels 4 are arranged in a matrix, each upper plywood panel 4 has four through-slots 41 on its sides (the side surfaces at the outermost edges may not have through-slots 41), and the through-slots 41 of adjacent upper plywood panels 4 are arranged in a corresponding manner. After the multiple baffles 2 pass through these through-slots 41, a criss-cross grid structure is formed on a plane, i.e., a cross-shaped structure.

[0051] In this embodiment, the cross-shaped grid structure provides a complete plane sealing for the entire insulation box structure. Combined with the filling block 1 and the filling block 3, a three-dimensional gap filling system can be formed, thereby significantly improving the overall insulation effect.

[0052] Preferably, Figure 7 As shown, the filling blocks 1 include an upper filling block 11 and a lower filling block 12; the lower filling blocks 12 and the upper filling blocks 11 are arranged from bottom to top within the gap 7. The joint positions of the upper filling blocks 11 do not overlap with the joint positions of the lower filling blocks 12, that is, the upper filling blocks 11 and the lower filling blocks 12 are arranged in a staggered manner, so that the joints of one layer of filling blocks 1 are covered by the other layer of filling blocks 1, which can enhance the sealing of the gap 7 and reduce the formation of thermal bridges.

[0053] In a specific example, the upper filling block 11 and the lower filling block 12 can be staggered along the length direction of the gap 7, the seam position of the upper filling block 11 corresponds to the middle of the lower filling block 12, and the seam position of the lower filling block 12 corresponds to the middle of the upper filling block 11. This arrangement can improve the overall sealing effect.

[0054] This embodiment also provides a membrane tank comprising a primary shielding layer, a primary plywood layer, a secondary shielding layer 8, and the aforementioned membrane tank insulation box structure. The primary shielding layer and secondary shielding layer 8 provide air and liquid tightness, the primary plywood layer provides support, and the membrane tank insulation box structure provides thermal insulation. The gap-filling structure 7 of this embodiment, incorporated into the insulation box structure, improves the overall insulation performance of the membrane tank and reduces evaporation losses of the liquefied gas.

[0055] In this embodiment, first, a filling block 1 is placed in the gap 7 between adjacent polyurethane layers 5; then, the baffle 2 is passed through the through slot 41 of the adjacent upper plywood 4 so that the baffle 2 is located above the gap 7 and abuts the filling block 1; finally, a filling block 3 is placed at the intersection formed above the upper plywood 4 so that the filling block 3 is located above the baffle 2. When using upper and lower filling blocks 12, they should be placed sequentially from bottom to top in the gap 7, and the seams of the upper filling block 11 and the lower filling block 12 should be staggered to form a staggered structure. The installation of the baffle 2 requires squeezing the wings inward, inserting them into the through slot 41, and then releasing them, and using elastic recovery to form a snap-fit ​​fixation. The filling 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 to cover all the insulation boxes and their gaps 7; then the main layer of plywood is laid on the secondary shielding layer 8; finally, the main shielding layer is laid on the main layer of plywood to form a complete membrane tank structure.

[0056] In practical applications, the membrane tank insulation box structure of Example 1 can be combined with the gap filling structure of Example 2 to form a more complete insulation system. Specifically, the filler block 1, baffle 2, and plugging block 3 structure of Example 2 can be installed in the upper-wide-and-lower-narrow gap of Example 1, so that the advantages of both can complement each other.

[0057] For example, the staggered filling blocks 1 of Example 2 can be used to fill the stepped gap of Example 1, and a pre-stressed V-shaped baffle 2 and a cross-shaped filling block 3 can be placed above the gap. More specifically, the cover plate 201 has a V-shaped structure (i.e., the V-shaped baffle 2), comprising a central portion and wings disposed on either side of the central portion, the central portion abutting the filling material 101; the side surfaces of the upper plywood 4 are provided with through-grooves 41 corresponding to the through-grooves 41 on the other upper plywood 4; and two adjacent through-grooves 41 are passed through each side of the cover plate 201. This combination not only utilizes the stepped gap to disrupt heat transfer connectivity, but also ensures a tight fit between the filling material and the gap wall in low-temperature environments through the pre-stress mechanism, thereby achieving excellent results in both preventing thermal bridge formation and accommodating material shrinkage.

[0058] In this combined embodiment, the cover plate 201 of Example 1 can be used in conjunction with the filling block 3 of Example 2 to form a more reliable upper sealing system; and the V-shaped baffle 2 of Example 2 can be used in conjunction with the stepped gap structure of Example 1 to form a more efficient heat barrier mechanism.

[0059] This combined implementation not only has the advantages of both embodiments, but also forms a more three-dimensional, multi-layered insulation system as a whole, further improving the insulation performance and service life of the film tank.

[0060] In summary, the membrane tank insulation box structure and membrane tank proposed in the present invention have the following advantages: Multiple sub-layer insulation boxes are arranged in a matrix. These boxes consist of an upper plywood, a polyurethane layer, and a lower plywood, arranged sequentially from top to bottom. Gaps are formed between the polyurethane layers of adjacent sub-layer insulation boxes, with the upper width of the gap being wider than the lower width. Filling material is placed within the gaps. The cover plates are connected on both sides to the upper surfaces of adjacent upper plywood boards and rest on the filling material, effectively preventing thermal bridges and blocking heat transfer from the upper to the lower sections, thereby improving overall insulation effectiveness. The cover plates cover the gaps and connect to the upper plywood, forming a protective layer that prevents heat convection between the space above the gaps and the gas within them. This allows the insulation boxes to shrink and deform in low-temperature environments, preventing seal failure.

[0061] In addition, each gap of the present invention is arranged in a step-like (ie, ladder-like) shape, which can destroy the connectivity of heat transfer and reduce the heat leakage problem.

[0062] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A film tank insulation box structure, characterized in that: Includes multiple sub-insulation boxes, filling materials and cover panels; The plurality of sub-layer insulation boxes are arranged in a matrix; the sub-layer insulation boxes include an upper plywood, a polyurethane layer, and a lower plywood arranged in sequence; a stepped gap is formed between the polyurethane layers of adjacent sub-layer insulation boxes, the upper width of the gap being greater than the lower width; the filling material is disposed within the gap; both sides of the cover plate are respectively connected to the upper surfaces of adjacent upper plywoods and are located above the filling material; The polyurethane layer comprises multiple layers, a first gap is formed between a portion of the polyurethane layers adjacent to the secondary insulation box, and a second gap is formed between another portion of the polyurethane layers adjacent to the secondary insulation box, and the width of the first gap is greater than the second gap; or The polyurethane layer includes an upper portion and a lower portion, the upper portion and the lower portion are integrally connected; a first gap is formed between the upper portions of adjacent sub-layer insulation boxes, and a second gap is formed between the lower portions of adjacent sub-layer insulation boxes, and the width of the first gap is greater than the second gap; A first gap is formed between adjacent upper plywood panels; The first gap, the first slit and the second gap are connected in sequence, and the width of the first gap is greater than that of the first gap, forming a narrow-wide-narrow structure.

2. The film tank insulation box structure according to claim 1, characterized in that: The filling material includes an upper filling material and a lower filling material, which are filled in the upper part of the gap and the lower part of the gap respectively.

3. The film tank insulation box structure according to claim 2, characterized in that: The density of the upper filling material is lower than the density of the lower filling material.

4. The film tank insulation box structure according to claim 2, characterized in that: The filling material includes a thermal insulation material.

5. The film tank insulation box structure according to claim 3, characterized in that: The cover plate has a V-shaped structure, including a middle part and wings arranged on both sides of the middle part, and the middle part abuts the filling material; the side of the upper plywood is provided with a through groove, and is arranged corresponding to the through groove on the other upper plywood; the two sides of the cover plate respectively pass through the two adjacent through grooves.

6. The film tank insulation box structure according to claim 1, characterized in that: The material of the cover plate includes low-temperature resistant soft material.

7. The film tank insulation box structure according to claim 1, characterized in that: The width of the cover plate is greater than the width of the gap.

8. The film tank insulation box structure according to claim 1, characterized in that: There is a second gap between adjacent lower plywood panels; the filling material is also arranged in the second gap.

9. The film tank insulation box structure according to claim 9, characterized in that: The width of the second gap is consistent with the width of the second slit.

10. A film tank, characterized in that: The invention comprises a primary shielding layer, a primary plywood layer, a secondary shielding layer and the film tank insulation box structure according to any one of claims 1 to 9, which are arranged in sequence.

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