membrane storage tanks

Abstract

The present application provides a film storage tank, which relates to the technical field of storage tank containers. The film storage tank includes a sealed cavity and a plurality of insulation modules, and the plurality of insulation modules are fixedly installed in the sealed cavity in sequence. The sealed cavity includes a first cavity wall and a second cavity wall that are arranged opposite to each other. The insulation module includes a first connection side and a second connection side that are arranged opposite to each other and a first contact surface and a second contact surface that are arranged opposite to each other, the first connection side is fixedly connected to the first cavity wall, the second connection side is fixedly connected to the second cavity wall, and the first contact surface and the second contact surface intersect directly or indirectly. According to the film storage tank provided by the present application, the insulation module is less likely to be deformed under the action of force, and has a stronger supporting capacity, thereby ensuring the reliability of the use of the film storage tank, and can reduce or even avoid the setting of the support structure in the prior art, thereby simplifying the structure of the film storage tank.

Description

Technical Field

[0001] The present application relates to the technical field of storage tank containers, and in particular to a film storage tank. Background Art

[0002] Membrane tanks are primarily used to store liquefied natural gas (LNG). Given LNG's cryogenic properties, membrane tanks are typically equipped with insulation modules to reduce the possibility of LNG vaporization during transportation.

[0003] Based on the structure of the existing thermal insulation module, the supporting strength is relatively low, and a supporting structure is needed to ensure the supporting strength of the membrane storage tank, thereby ensuring the reliability of the membrane storage tank. Summary of the Invention

[0004] The present application provides a membrane storage tank, which includes an insulation module. The first contact surface and the second contact surface of the insulation module directly or indirectly intersect, so that the insulation module is less likely to deform under the action of force, and has stronger supporting capacity, thereby ensuring the reliability of the membrane storage tank. It can reduce or even avoid the setting of the support structure in the prior art and simplify the structure of the membrane storage tank.

[0005] In a first aspect, the present application provides a membrane storage tank comprising a sealed cavity and a plurality of insulation modules, wherein the plurality of insulation modules are sequentially fixedly mounted within the sealed cavity. The sealed cavity comprises a first cavity wall and a second cavity wall disposed oppositely. The insulation modules comprise a first connection side and a second connection side disposed oppositely, and a first contact surface and a second contact surface disposed oppositely. The first connection side is fixedly connected to the first cavity wall, the second connection side is fixedly connected to the second cavity wall, and the first contact surface and the second contact surface directly or indirectly intersect.

[0006] In the example of the present application, the sealed cavity can provide an installation space for the insulation module. Since the first cavity wall and the second cavity wall are part of the installation cavity, and the first connection side and the second connection side are part of the insulation module, the first connection side is fixedly connected to the first cavity wall, and the second connection side is fixedly connected to the second cavity wall, so that different parts of the insulation module are fixedly connected to different cavity walls of the sealed cavity, thereby reducing the possibility of the insulation module shaking in the sealed cavity and ensuring the reliability of the membrane storage tank.

[0007] Since the first contact surface and the second contact surface are also part of the insulation module, the first connection side is fixedly connected to the first cavity wall, and the second connection side is fixedly connected to the second cavity wall. The force acting on the first connection side through the first cavity wall and the force acting on the second connection side through the second cavity wall can be transmitted to the first contact surface and the second contact surface, and the first contact surface and the second contact surface intersect directly or indirectly, so that the direction of the force transmitted to the first contact surface and the second contact surface is changed. Compared with the prior art, the four sides of the cross section of the insulation module are perpendicular to each other and are easily deformed under the action of force. In the example of the present application, the insulation module is less likely to be deformed under the action of force and has stronger supporting capacity, which can ensure the reliability of the use of the membrane storage tank, reduce or even avoid the setting of the support structure in the prior art, and simplify the structure of the membrane storage tank.

[0008] In some possible implementations, the thermal insulation module includes a first moisture-proof layer and a thermal insulation layer connected to each other, the first moisture-proof layer being disposed on a side of the thermal insulation layer facing the second cavity wall. Alternatively, the first thermal insulation module is a vacuum box.

[0009] In the example of the present application, the first insulation module may include a first moisture-proof layer and an insulation layer connected to each other. The first moisture-proof layer is arranged on the side of the insulation layer facing the second cavity wall, which can reduce the possibility of moisture and the like entering the insulation layer from the second cavity wall, thereby ensuring the reliability of the insulation layer and reducing the heat exchange efficiency between the inside of the membrane storage tank and the external environment.

[0010] The first insulation module can also be a vacuum box, which is connected between the first cavity wall and the second cavity wall. Based on the physical properties of the vacuum box, the vacuum box can reduce the comprehensive thermal conductivity between the first cavity wall and the second cavity wall, so that the heat exchange efficiency between the inside of the film storage tank and the external environment is lower.

[0011] In some possible implementations, the sealed cavity includes a first sealed cavity, and the insulation module includes a first insulation module. The film storage tank includes a main shielding film and a secondary shielding film. The secondary shielding film is spaced apart from the main shielding film, and the secondary shielding film cooperates with the main shielding film to form a first sealed cavity. The first cavity wall includes a side of the main shielding film facing the secondary shielding film, and the second cavity wall includes a side of the secondary shielding film facing the main shielding film. A plurality of first insulation modules are sequentially arranged in the first sealed cavity, and the first insulation module includes a first sub-connection side and a second sub-connection side that are relatively arranged, and a first sub-contact surface and a second sub-contact surface that are relatively arranged, the first connection side includes a first sub-connection side, the second connection side includes a second sub-connection side, the first contact surface includes a first sub-contact surface, the second contact surface includes a second sub-contact surface, the first sub-connection side is fixedly connected to the main shielding film, the second sub-connection side is fixedly connected to the secondary shielding film, and the first sub-contact surface and the second sub-contact surface directly or indirectly intersect.

[0012] In the example of this application, the primary shielding film and the secondary shielding film cooperate to form a first sealed cavity, which provides installation space for multiple first thermal insulation modules. Because the first sub-connection side and the second sub-connection side are both part of the first thermal insulation module, the first sub-connection side is fixedly connected to the primary shielding film, and the second sub-connection side is fixedly connected to the secondary shielding film, so that different parts of the first thermal insulation module are fixedly connected to the first sealed cavity, reducing the possibility of the first thermal insulation module shaking within the first sealed cavity and ensuring the reliability of the membrane storage tank.

[0013] Since the first sub-contact surface and the second sub-contact surface are also part of the first insulation module, the first sub-connection side is fixedly connected to the main shielding film, and the second sub-connection side is fixedly connected to the secondary shielding film. The force acting on the first sub-connection side through the main shielding film and the force acting on the second sub-connection side through the secondary shielding film can be transmitted to the first sub-contact surface and the second sub-contact surface, and the first sub-contact surface and the second sub-contact surface directly or indirectly intersect, so that the direction of the force transmitted to the first sub-contact surface and the second sub-contact surface is changed. Compared with the prior art, the four sides of the cross section of the insulation module are perpendicular to each other and are easily deformed under the action of force. In the example of the present application, the first insulation module is less likely to be deformed under the action of force and has stronger supporting capacity, thereby ensuring the reliability of the use of the membrane storage tank, reducing or even avoiding the setting of the support structure in the prior art, and simplifying the structure of the membrane storage tank.

[0014] In some possible implementations, the first sub-connection side is in surface contact with the primary shielding film, and the second sub-connection side is in surface contact with the secondary shielding film.

[0015] In the example of the present application, the first sub-connection side is configured to be in surface contact with the primary shielding film, thereby increasing the contact area between the first sub-connection side and the primary shielding film. This can enhance the connection reliability between the first sub-connection side and the primary shielding film, thereby ensuring the connection reliability between the first thermal insulation module and the primary shielding film. The second sub-connection side is configured to be in surface contact with the secondary shielding film, thereby increasing the contact area between the second sub-connection side and the primary shielding film, thereby enhancing the connection reliability between the second sub-connection side and the secondary shielding film, thereby ensuring the connection reliability between the first thermal insulation module and the secondary shielding film.

[0016] In some possible implementations, the primary shielding film includes a plurality of connected primary shielding sub-films, with the connection gap between two adjacent primary shielding sub-films located in the middle of the first sub-connection side. The secondary shielding film includes a plurality of connected secondary shielding sub-films, with the connection gap between two adjacent secondary shielding sub-films located in the middle of the second sub-connection side.

[0017] In the example of the present application, the connection gap between the two adjacent main shielding membranes is located in the middle of the first sub-connection side. Compared with the connection gap between the two adjacent main shielding membranes being located at the edge of the first sub-connection side, the force on the connection area between the two adjacent main shielding membranes and the first sub-connection side can be more uniform, thereby improving the connection reliability between the main shielding film and the first sub-connection side.

[0018] The connection method of the two adjacent sub-shielding membranes to the second sub-connection side is similar, and the functions they play are similar, so this application example will not be described in detail here.

[0019] In some possible implementations, the sealed cavity further includes a second sealed cavity, and the insulation module further includes a second insulation module. The membrane storage tank further includes an outer tank layer and a secondary shielding film, the outer tank layer and the secondary shielding film layer cooperate to form a second sealed cavity, the first cavity wall includes a side of the secondary shielding film facing the outer tank layer, and the second cavity wall includes a side of the outer tank layer facing the secondary shielding film. A plurality of second insulation modules are sequentially arranged in the second sealed cavity, the second insulation module includes a third sub-connection side and a fourth sub-connection side that are relatively arranged, and a third sub-contact surface and a fourth sub-contact surface that are relatively arranged, the first connection side includes the third sub-connection side, the second connection side includes the fourth sub-connection side, the first contact surface includes the third sub-contact surface, and the second contact surface includes the fourth sub-contact surface. The third sub-connection side is fixedly connected to the secondary shielding film, the fourth sub-connection side is connected to the outer tank layer, and the third sub-contact surface and the fourth sub-contact surface directly or indirectly intersect.

[0020] In the example of this application, the secondary shielding film cooperates with the outer tank layer to form a second sealed cavity, which can provide installation space for multiple second insulation modules. Since the third sub-connection side and the fourth sub-connection side are both part of the second insulation module, the third sub-connection side is fixedly connected to the secondary shielding film, and the fourth sub-connection side is fixedly connected to the outer tank layer, so that different parts of the second insulation module are fixedly connected to the second sealed cavity, reducing the possibility of the second insulation module shaking in the second sealed cavity, thereby making the path for transmitting liquid load in the second sealed cavity more stable and reliable, ensuring the reliability of the membrane storage tank.

[0021] Since the third sub-contact surface and the fourth sub-contact surface are also part of the second insulation module, the third sub-connection side is fixedly connected to the secondary shielding film, and the fourth sub-connection side is fixedly connected to the outer tank layer. The force acting on the third sub-connection side through the secondary shielding film and the force acting on the fourth sub-connection side through the outer tank layer can be transmitted to the third sub-contact surface and the fourth sub-contact surface, and the third sub-contact surface and the fourth sub-contact surface directly or indirectly intersect, so that the direction of the force transmitted to the third sub-contact surface and the fourth sub-contact surface is changed. Compared with the prior art, the four sides of the cross section of the insulation module are perpendicular to each other and are easily deformed under the action of force. In the example of this application, the second insulation module is less likely to be deformed under the action of force and has stronger supporting capacity, thereby ensuring the reliability of the use of the membrane storage tank, and can reduce or even avoid the setting of the support structure in the prior art, further simplifying the structure of the membrane storage tank.

[0022] In some possible implementations, the first thermal insulation module and the second thermal insulation module are staggered along a direction from the primary shielding film toward the secondary shielding film.

[0023] Compared with the aligned setting of the first insulation module and the second insulation module, in the example of this application, the first insulation module and the second insulation module are staggered, which can extend the heat transfer path between different insulation modules, thereby reducing the heat conduction efficiency between the interior of the membrane storage tank and the external environment.

[0024] In addition, the first insulation module and the second insulation module are staggered so that along the direction of the main shielding film toward the secondary shielding film, the support points provided by the first insulation module for the secondary shielding film and the support points provided by the second insulation module for the secondary shielding film are staggered, which is beneficial to further improve the support strength of the membrane storage tank.

[0025] In some possible implementations, a connecting piece is provided on a side of the second insulation module facing the outer tank layer, and the connecting piece is connected to the outer tank layer.

[0026] In the example of this application, the connecting piece is provided on the side of the second insulation module facing the outer tank layer, and the connecting piece can be connected to the outer tank layer. Therefore, a reliable connection between the second insulation module and the outer tank layer can be achieved through the connecting piece.

[0027] In some possible implementations, the second insulation module includes a first vacuum box, a first welding layer is provided on the side of the first vacuum box facing the outer tank layer, a second welding layer is provided on the side of the outer tank layer facing the first vacuum box, and the first welding layer is welded to the second welding layer.

[0028] In the example of this application, the first welding layer is arranged on the side of the first vacuum box facing the outer tank layer, and the second welding layer is arranged on the side of the outer tank layer facing the first vacuum box. Therefore, the welding connection between the first welding layer and the second welding layer can achieve a reliable connection between the first vacuum box and the outer tank layer.

[0029] In some possible implementations, the outer tank layer is provided with a first vent, the first insulation module includes a second vacuum box, the membrane storage tank also includes a first connecting structure and a first connecting pipe, the first connecting structure connects multiple second vacuum boxes, and the multiple connected second vacuum boxes pass through the first connecting pipe through the first vent and are connected to the first vacuum pump.

[0030] In the example of the present application, two adjacent second vacuum boxes can be connected through the first connecting structure, and the connected multiple second vacuum boxes are connected to the first vacuum pump through the first connecting pipe, so that the first vacuum pump can evacuate the connected multiple second vacuum boxes through the first connecting pipe.

[0031] In some possible implementations, the first insulation module includes a second vacuum box, in which the first support structure is provided; and / or the second insulation module includes a first vacuum box, in which the second support structure is provided.

[0032] In this example, the first insulation module includes a second vacuum box, which is provided with a first support structure. The provision of the first support structure further enhances the support strength of the second vacuum box, thereby enhancing the support strength of the membrane storage tank. The second support structure performs a similar function to the first support structure and will not be further described in this example. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the matching structure of an insulation module installed in a sealed cavity provided in an example of this application.

[0034] Figure 2 A schematic structural diagram of an insulation module provided as an example in this application.

[0035] Figure 3 A schematic diagram of the internal structure of an insulation module provided as an example in this application.

[0036] Figure 4 A schematic diagram of the matching structure of a primary shielding film, a secondary shielding film and a first insulation module provided as an example in this application.

[0037] Figure 5 A schematic structural diagram of a portion of the tank wall of a membrane storage tank provided as an example in this application.

[0038] Figure 6 A schematic structural diagram of a special-shaped insulation module provided as an example in this application.

[0039] Figure 7 A schematic structural diagram of another special-shaped insulation module provided as an example in this application.

[0040] Figure 8 A schematic diagram of the structure of a plywood provided as an example in this application.

[0041] Description of reference numerals:

[0042] 100. Sealed cavity; 110. First cavity wall; 120. Second cavity wall; 130. First sealed cavity; 131. Primary shielding film; 1311. Primary shielding membrane; 132. Secondary shielding film; 1321. Secondary shielding membrane; 140. Second sealed cavity; 141. Outer tank layer; 200. Insulation module; 210. First connection side; 220. Second connection side; 230. First contact surface; 240. Insulation layer; 250. First moisture-proof layer; 260. First insulation module; 270. Second insulation module; 280. Special-shaped insulation module; 300. Plywood; 310. Third moisture-proof layer. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the examples of this application more clear, the technical solutions in the examples of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the examples described are only part of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein in the specification of the application are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0045] References to "examples" herein mean that a particular feature, structure, or characteristic described in connection with the examples may be included in at least one example of the present application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor does it constitute an independent or alternative example that is mutually exclusive of other examples. It is understood, both explicitly and implicitly, by those skilled in the art that the examples described herein may be combined with other examples.

[0046] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists, A and B exist, and B exists. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0047] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the membrane storage tank of this application.

[0048] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0049] In the description of this application, unless otherwise specified, “plurality” means two or more (including two), and similarly, “multiple groups” means two or more (including two).

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts, or other barrier; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] Membrane tanks are primarily used to store liquefied natural gas (LNG). Given LNG's cryogenic properties, membrane tanks are typically equipped with insulation modules to minimize vaporization during LNG transportation. These modules protect the membrane tanks and reduce the rate of thermal exchange between the tank interior and the external environment.

[0052] Based on the structure of the existing insulation module, the cross-section of the insulation module is generally rectangular, which is easily deformed under the action of force, resulting in low support strength of the insulation module. It is necessary to use a supporting structure to ensure the support strength of the membrane storage tank and the reliability of the membrane storage tank, which makes the structure of the membrane storage tank relatively complex.

[0053] Based on the above, this application example provides a membrane storage tank.

[0054] In order to enable people skilled in the art to better understand the present application, the membrane storage tank provided in the example of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0055] Illustratively, the present application provides a membrane storage tank.

[0056] This application provides a membrane storage tank, Figure 1 This is a schematic diagram of the structure of a thermal insulation module installed in a sealed cavity, provided as an example in this application. Figure 2 This is a schematic diagram of the structure of an insulation module provided as an example in this application. Figure 1 and Figure 2 The membrane storage tank includes a sealed chamber 100 and a plurality of thermal insulation modules 200, which are sequentially fixedly installed in the sealed chamber 100. The sealed chamber 100 includes a first chamber wall 110 and a second chamber wall 120 disposed oppositely. The thermal insulation module 200 includes a first connecting side 210 and a second connecting side 220 disposed oppositely, and a first contact surface 230 and a second contact surface disposed oppositely. The first connecting side 210 is fixedly connected to the first chamber wall 110, the second connecting side 220 is fixedly connected to the second chamber wall 120, and the first contact surface 230 and the second contact surface intersect directly or indirectly.

[0057] The membrane storage tank may include only one sealed cavity 100, or may include a plurality of sealed cavities 100 disposed at intervals. A heat insulation module 200 may be disposed in at least one sealed cavity 100 of the membrane storage tank.

[0058] The membrane storage tank includes a primary shielding film, a secondary shielding film, and an outer tank layer. A sealed cavity 100 can be located between the primary and secondary shielding films. In this case, the primary shielding film serves as a first cavity wall 110, and the secondary shielding film serves as a second cavity wall 120. Alternatively, the sealed cavity 100 can be located between the outer tank layer and the secondary shielding film. In this case, the secondary shielding film serves as the first cavity wall 110, and the outer tank layer serves as the second cavity wall 120.

[0059] The insulation module 200 includes a first connection side 210 and a second connection side 220 that are oppositely arranged. The first connection side 210 is fixedly connected to the first cavity wall 110, the second connection side 220 is fixedly connected to the second cavity wall 120, and a first contact surface 230 and a second contact surface that are oppositely arranged.

[0060] The thermal insulation module 200 may include only one set of first contact surfaces 230 and second contact surfaces that are oppositely disposed, or may include multiple sets of first contact surfaces 230 and second contact surfaces that are oppositely disposed, and this application example does not impose any specific limitation.

[0061] The first contact surface 230 connects the first end of the first connection side 210 and the first end of the second connection side 220 , and the second contact surface connects the second end of the first connection side 210 and the second end of the second connection side 220 .

[0062] The first contact surface 230 intersects the second contact surface directly or indirectly, so that the first contact surface 230 cooperates with the second contact surface to form a first angle, which is greater than 0° and less than 90°.

[0063] The first contact surface 230 and the second contact surface directly intersect each other, which means that the first connection side 210 is in line contact with the first cavity wall 110, and the second connection side 220 is in surface contact with the second cavity wall 120. In this case, the first contact surface 230 and the second contact surface intersect to form the first connection side 210. The intersection of the first contact surface 230 and the second contact surface can form a rounded corner, and the cross-section of the thermal insulation module 200 is triangular. Alternatively, the first connection side 210 is in surface contact with the first cavity wall 110, and the second connection side 220 is in line contact with the second cavity wall 120. In this case, the first contact surface 230 and the second contact surface intersect to form the second connection side 220. The cross-section of the thermal insulation module 200 is triangular, and the intersection of the first contact surface 230 and the second contact surface can form a rounded corner.

[0064] The indirect intersection of the first contact surface 230 and the second contact surface means that the first contact surface 230 and the second contact surface cooperate to form a first angle, and the extended surface of the first contact surface 230 intersects with the extended surface of the second contact surface. At this time, the first connection side 210 can be in surface contact with the first cavity wall 110, and the second connection side 220 is in surface contact with the second cavity wall 120. At this time, the cross-section of the insulation module 200 can be a trapezoid.

[0065] For two adjacent insulation modules 200, the first contact surface 230 of one insulation module 200 is set close to the second contact surface of the other insulation module 200. The first contact surface 230 of one insulation module 200 and the second contact surface of the other insulation module 200 can be fitted, parallel or set at an angle. This application example does not impose specific restrictions on this.

[0066] The connection method between the first connection side 210 and the first cavity wall 110 is similar to the connection method between the second connection side 220 and the second cavity wall 120. For example, the first connection side 210 can be fixedly connected to the first cavity wall 110 by riveting, welding, bonding, etc.

[0067] The insulation module 200 is designed according to the size of the membrane storage tank, and the size of the insulation module 200 mainly depends on the size of the sealed cavity 100 .

[0068] A plurality of thermal insulation modules 200 may be fixedly installed in the sealed cavity 100 along the axial direction or radial direction of the membrane storage tank.

[0069] In the example of the present application, the sealed cavity 100 can provide an installation space for the insulation module 200. Since the first cavity wall 110 and the second cavity wall 120 are part of the installation cavity, the first connection side 210 and the second connection side 220 are part of the insulation module 200. Therefore, the first connection side 210 is fixedly connected to the first cavity wall 110, and the second connection side 220 is fixedly connected to the second cavity wall 120, so that different parts of the insulation module 200 are fixedly connected to different cavity walls of the sealed cavity 100, thereby reducing the possibility of the insulation module 200 shaking in the sealed cavity 100 and ensuring the reliability of the film storage tank.

[0070] Since the first contact surface 230 and the second contact surface are also part of the insulation module 200, the first connection side 210 is fixedly connected to the first cavity wall 110, and the second connection side 220 is fixedly connected to the second cavity wall 120. The force acting on the first connection side 210 through the first cavity wall 110 and the force acting on the second connection side 220 through the second cavity wall 120 can both be transmitted to the first contact surface 230 and the second contact surface. The first contact surface 230 and the second contact surface intersect directly or indirectly, so that the direction of the force transmitted to the first contact surface 230 and the second contact surface changes. Compared with the prior art, the four sides of the cross section of the insulation module 200 are perpendicular to each other and are easily deformed under the action of force. In the example of the present application, the insulation module 200 is less likely to deform under the action of force and has a stronger supporting capacity, which can ensure the reliability of the membrane storage tank, reduce or even avoid the setting of the support structure in the prior art, and simplify the structure of the membrane storage tank.

[0071] Based on the membrane storage tank provided in the above example, Figure 3 For the internal structure diagram of a thermal insulation module provided in this application example, please refer to Figure 3 The thermal insulation module 200 includes a first moisture-proof layer 250 and a thermal insulation layer 240 connected to each other. The first moisture-proof layer 250 is disposed on a side of the thermal insulation layer 240 facing the second cavity wall 120. Alternatively, the thermal insulation module 200 is a vacuum box.

[0072] The material of the first moisture-proof layer 250 can be a polymer material such as polyethylene, polypropylene, modified epoxy resin, polyurethane, polyvinyl chloride, etc., or other materials, and this application example does not make specific restrictions on this.

[0073] When the first moisture-proof layer 250 is made of non-metallic materials such as polymers, the insulation module 200 can be connected to the second cavity wall 120 by bonding, or by bonding combined with riveting.

[0074] The insulating layer 240 may be made of at least one of insulating materials such as polyurethane foam, glass wool, and aerogel.

[0075] The insulation layer 240 can reduce the combined thermal conductivity of the first cavity wall 110 facing away from the secondary insulation layer 240 and the second cavity wall 120 facing away from the insulation layer 240. In this case, the insulation module 200 can be fixedly connected to the first cavity wall 110 directly or indirectly.

[0076] When the insulation module 200 is a vacuum box, the box body of the vacuum box may be made of stainless steel. In this case, the vacuum box may be connected to the first cavity wall 110 and the second cavity wall 120 by welding or bonding.

[0077] Based on the characteristics of vacuum, the vacuum box can reduce the comprehensive thermal conductivity between the side of the first chamber wall 110 facing away from the vacuum box and the side of the second chamber wall 120 facing away from the second vacuum box.

[0078] In the example of the present application, the insulation module 200 may include a first moisture-proof layer 250 and an insulation layer 240 connected to each other. The first moisture-proof layer 250 is arranged on the side of the insulation layer 240 facing the second cavity wall 120, which can reduce the possibility of moisture and the like entering the insulation layer 240 from the second cavity wall 120, thereby ensuring the reliability of the insulation layer 240 and reducing the heat exchange efficiency between the inside of the membrane storage tank and the external environment.

[0079] The insulation module 200 can also be a vacuum box, which is connected between the first cavity wall 110 and the second cavity wall 120. Based on the physical properties of the vacuum box, the vacuum box can reduce the comprehensive thermal conductivity between the first cavity wall 110 and the second cavity wall 120, so that the heat exchange efficiency between the inside of the film storage tank and the external environment is lower.

[0080] Based on the membrane storage tank provided in the above example, Figure 4 For a schematic diagram of the structure of the primary shielding film, the secondary shielding film and the first insulation module provided in this application example, please refer to Figure 4. The sealed cavity 100 includes a first sealed cavity 130, and the insulation module 200 includes a first insulation module 260. The membrane storage tank includes a main shielding film 131, a secondary shielding film 132 and a first insulation module 260. The secondary shielding film 132 is spaced apart from the main shielding film 131, and the secondary shielding film 132 cooperates with the main shielding film 131 to form the first sealed cavity 130. The first cavity wall includes a side of the main shielding film facing the secondary shielding film, and the second cavity wall includes a side of the secondary shielding film facing the main shielding film. A plurality of first insulation modules 260 are sequentially arranged in the first sealed cavity 130. The first insulation module 260 includes a first sub-connection side and a second sub-connection side that are relatively arranged, and a first sub-contact surface and a second sub-contact surface that are relatively arranged. The first connection side 210 includes a first sub-connection side, the second connection side 220 includes a second sub-connection side, the first contact surface 230 includes a first sub-contact surface, and the second contact surface includes a second sub-contact surface. The first sub-connection side is fixedly connected to the primary shielding film 131 , the second sub-connection side is fixedly connected to the secondary shielding film 132 , and the first sub-contact surface intersects the second sub-contact surface directly or indirectly.

[0081] The material of the primary shielding film 131 and the secondary shielding film 132 can be the same, and both can be made of austenitic stainless steel, nickel-iron alloy, or the like. The material of the primary shielding film 131 and the secondary shielding film 132 can also be different. For example, the primary shielding film 131 can be made of a metal material, and the secondary shielding film 132 can be made of a composite material. This example of the present application does not impose any specific limitations on this.

[0082] The primary shielding film 131 and other structures enclose a chamber for accommodating LNG. The primary shielding film 131 and the secondary shielding film 132 cooperate to form a first sealed chamber 130. This first sealed chamber 130 can be a vacuum chamber, and the gas pressure within the first sealed chamber 130 can also be equal to the ambient gas pressure. This example application does not impose specific limitations on this.

[0083] The first insulation module 260 can be made of insulation materials such as polyurethane. The first insulation module 260 can also be a second vacuum box, and this application example does not impose any specific restrictions on this.

[0084] Regarding the structure of the first insulation module, please refer to the relevant description of the insulation module mentioned above. This application example will not be described in detail here.

[0085] In the example of the present application, the primary shielding film 131 and the secondary shielding film 132 cooperate to form a first sealed cavity 130, which provides installation space for multiple first thermal insulation modules 260. Since the first sub-connection side and the second sub-connection side are both part of the first thermal insulation module 260, the first sub-connection side is fixedly connected to the primary shielding film 131, and the second sub-connection side is fixedly connected to the secondary shielding film 132, so that different parts of the first thermal insulation module 260 are fixedly connected to the cavity wall of the first sealed cavity 130, reducing the possibility of the first thermal insulation module 260 shaking within the first sealed cavity 130 and ensuring the reliability of the membrane storage tank.

[0086] Since the first sub-contact surface and the second sub-contact surface are also part of the first insulation module 260, the first sub-connection side is fixedly connected to the main shielding film 131, and the second sub-connection side is fixedly connected to the secondary shielding film 132. The force acting on the first sub-connection side through the main shielding film 131 and the force acting on the second sub-connection side through the secondary shielding film 132 can be transmitted to the first sub-contact surface and the second sub-contact surface, and the first sub-contact surface and the second sub-contact surface directly or indirectly intersect, so that the direction of the force transmitted to the first sub-contact surface and the second sub-contact surface is changed. Compared with the prior art, the four sides of the cross section of the insulation module are perpendicular to each other and are easily deformed under the action of force. In the example of the present application, the first insulation module 260 is less likely to be deformed under the action of force and has stronger supporting capacity, which can ensure the reliability of the use of the membrane storage tank, reduce or even avoid the setting of the support structure in the prior art, and simplify the structure of the membrane storage tank.

[0087] Based on the membrane tank provided in the above example, please refer to Figure 4 The first sub-connection side is in surface contact with the main shielding film 131 , and the second sub-connection side is in surface contact with the secondary shielding film 132 .

[0088] The contact area between the first sub-connection side and the main shielding film 131 can be larger than the contact area between the second sub-connection side and the secondary shielding film 132, and the contact area between the first sub-connection side and the main shielding film 131 can be smaller than the contact area between the second sub-connection side and the secondary shielding film 132.

[0089] In the example of the present application, the first sub-connection side is provided in surface contact with the main shielding film 131, so that the contact area between the first sub-connection side and the main shielding film 131 is larger, which can enhance the connection reliability between the first sub-connection side and the main shielding film 131, thereby ensuring the reliability of the connection between the first thermal insulation module 260 and the main shielding film 131. The second sub-connection side is provided in surface contact with the secondary shielding film 132, so that the contact area between the second sub-connection side and the main shielding film 131 is larger, thereby enhancing the connection reliability between the second sub-connection side and the secondary shielding film 132, thereby ensuring the reliability of the connection between the first thermal insulation module 260 and the secondary shielding film 132.

[0090] Based on the membrane tank provided in the above example, please refer to Figure 4 The primary shielding film 131 includes a plurality of connected primary shielding films 1311, with the gap between two adjacent primary shielding films 1311 located in the middle of the first sub-connection side. The secondary shielding film 132 includes a plurality of connected secondary shielding films 1321, with the gap between two adjacent secondary shielding films 1321 located in the middle of the second sub-connection side.

[0091] The connection method between the main shielding film 131 and the first sub-connection side is similar to the connection method between the secondary shielding film 132 and the second sub-connection side. The following description will only take the connection between the main shielding film 131 and the first sub-connection side as an example.

[0092] The main shielding film 131 includes multiple connected main shielding sub-films 1311. The two adjacent main shielding sub-films 1311 can be welded together, glued together, or connected in other ways, as long as the sealing performance and connection reliability of the connection between the two adjacent main shielding sub-films 1311 can be guaranteed. The example of this application only describes the example of welding two adjacent main shielding sub-films 1311 together, and welding the main shielding film 131 to the first insulation module 260.

[0093] The middle portion of the first sub-connection side refers to a portion between a position of the first sub-connection side close to the first sub-contact surface and a position of the first sub-connection side close to the second sub-contact surface.

[0094] The connecting gap between the two adjacent main shielding films 1311 is located in the middle part of the first sub-connection side. The intersecting edges of the first sub-connection side and the first sub-contact surface do not contact the connecting gap between the two adjacent main shielding films 131, and the intersecting edges of the first sub-connection side and the second sub-contact surface do not contact the connecting gap between the two adjacent main shielding films 131.

[0095] In the example of the present application, the connecting gap between the two adjacent main shielding membranes 1311 is located in the middle of the first sub-connection side. Compared with the connecting gap between the two adjacent main shielding membranes 1311 being located at the edge of the first sub-connection side, the force on the connecting area between the two adjacent main shielding membranes 1311 and the first sub-connection side can be more uniform, thereby improving the connection reliability between the main shielding film 131 and the first sub-connection side.

[0096] The connection method of the two adjacent sub-shielding membranes 1321 and the second sub-connection side are similar, and they play similar roles, so this application example will not be described in detail here.

[0097] Based on the membrane storage tank provided in the above example, Figure 5 This is a schematic structural diagram of a partial tank wall of a membrane storage tank provided as an example in this application. The outer tank layer, the secondary shielding film and the primary shielding film, the first insulation module and the second insulation module cooperate to form the tank wall of the membrane storage tank.

[0098] Please refer to Figure 5 The sealed cavity also includes a second sealed cavity 140, and the thermal insulation module also includes a second thermal insulation module 270. The membrane storage tank also includes an outer tank layer 141 and a secondary shielding film. The outer tank layer 141 and the secondary shielding film 132 cooperate to form the second sealed cavity 140. The first cavity wall 110 includes a side of the secondary shielding film 132 facing the outer tank layer 141, and the second cavity wall 120 includes a side of the outer tank layer 141 facing the secondary shielding film 132. A plurality of second thermal insulation modules 270 are sequentially arranged in the second sealed cavity 140. The second thermal insulation modules 270 include a third sub-connection side and a fourth sub-connection side that are oppositely arranged, and a third sub-contact surface and a fourth sub-contact surface that are oppositely arranged. The first connection side 210 includes the third sub-connection side, the second connection side 220 includes the fourth sub-connection side, the first contact surface 230 includes the third sub-contact surface, and the second contact surface includes the fourth sub-contact surface. The third sub-connection side is fixedly connected to the secondary shielding film 132 , the fourth sub-connection side is connected to the outer tank layer 141 , and the third sub-contact surface intersects directly or indirectly with the fourth sub-contact surface.

[0099] The outer tank layer 141 and the secondary shielding film 132 cooperate to form a second sealed cavity 140. The second sealed cavity 140 can be a vacuum cavity, and the gas pressure in the second sealed cavity 140 can also be equal to the gas pressure of the external environment. This application example does not impose specific restrictions on this.

[0100] A second moisture-proof layer is provided on the side of the outer tank layer 141 facing the secondary shielding film 132. The function of the second moisture-proof layer is similar to that of the first moisture-proof layer, and this application example will not be described in detail here.

[0101] The outer tank layer 141 can be made of concrete, steel, composite materials, etc.

[0102] The second insulation module 270 is similar in structure to the first insulation module 260. The dimensions of the second insulation module 270 may be the same as or different from those of the first insulation module 260. This application example is described using the example where the dimensions of the second insulation module 270 are the same as those of the first insulation module 260. The configuration of the second insulation module 270 is similar to that of the first insulation module 260 and will not be described in detail in this application example.

[0103] The second thermal insulation module 270 is designed according to the size of the membrane storage tank, and the size of the second thermal insulation module 270 mainly depends on the size of the second sealed cavity 140 .

[0104] The plurality of second insulation modules 270 may be fixedly installed in the second sealed cavity 140 along the axial direction or radial direction of the membrane storage tank.

[0105] The second insulation module 270 can be made of materials such as polyurethane material. The second insulation module 270 can also be a first vacuum box, and this application example does not impose specific restrictions on this.

[0106] The second thermal insulation module 270 includes a third sub-connection side and a fourth sub-connection side that are oppositely disposed, and a third sub-contact surface and a fourth sub-contact surface that are oppositely disposed.

[0107] The third sub-connection side is connected to the side of the secondary shielding film 132 away from the first insulation module 260 , and the third sub-connection side and the secondary shielding film 132 can be fixedly connected by bonding, welding, riveting, etc.

[0108] The fourth sub-connection side is connected to the side of the outer tank layer 141 facing the secondary shielding film 132 , and the fourth sub-connection side can be fixedly connected to the outer tank layer 141 by welding, riveting, threading, etc.

[0109] The third sub-contact surface intersects the fourth sub-contact surface directly or indirectly, so that the third sub-contact surface cooperates with the fourth sub-contact surface to form a second angle, which is greater than 0° and less than 90°.

[0110] The direct intersection of the third sub-contact surface and the fourth sub-contact surface means that the third sub-connection side is in line contact with the secondary shielding film 132, and the fourth sub-connection side is in surface contact with the outer tank layer 141. In this case, the third sub-contact surface and the fourth sub-contact surface intersect to form the third sub-connection side, the cross-section of the second thermal insulation module 270 is triangular, and the intersection of the third sub-contact surface and the fourth sub-contact surface can form a rounded corner. Alternatively, the third sub-connection side is in surface contact with the secondary shielding film 132, and the fourth sub-connection side is in line contact with the outer tank layer 141. In this case, the third sub-contact surface and the fourth sub-contact surface intersect to form the fourth sub-connection side, the intersection of the third sub-contact surface and the fourth sub-contact surface can form a rounded corner, and the cross-section of the second thermal insulation module 270 is triangular.

[0111] The indirect intersection of the third sub-contact surface and the fourth sub-contact surface means that the third sub-contact surface and the fourth sub-contact surface cooperate to form a second angle, and the extended surface of the third sub-contact surface and the extended surface of the fourth sub-contact surface can intersect. At this time, the third sub-connection side can be in surface contact with the secondary shielding film 132, and the fourth sub-connection side can be in surface contact with the outer tank layer 141. At this time, the cross-section of the second insulation module 270 can be a trapezoid.

[0112] In the example of the present application, the secondary shielding film 132 cooperates with the outer tank layer 141 to form a second sealed cavity 140, which can provide installation space for multiple second thermal insulation modules 270. Since the third sub-connection side and the fourth sub-connection side are both part of the second thermal insulation module 270, the third sub-connection side is fixedly connected to the secondary shielding film 132, and the fourth sub-connection side is fixedly connected to the outer tank layer 141, so that different parts of the second thermal insulation module 270 are fixedly connected to the second sealed cavity 140, reducing the possibility of the second thermal insulation module 270 shaking in the second sealed cavity 140, thereby making the path for transmitting the liquid load in the second sealed cavity 140 more stable and reliable, ensuring the reliability of the membrane storage tank.

[0113] Since the third sub-contact surface and the fourth sub-contact surface are also part of the second insulation module 270, the third sub-connection side is fixedly connected to the secondary shielding film 132, and the fourth sub-connection side is fixedly connected to the outer tank layer 141. The force acting on the third sub-connection side through the secondary shielding film 132 and the force acting on the fourth sub-connection side through the outer tank layer 141 can be transmitted to the third sub-contact surface and the fourth sub-contact surface, and the third sub-contact surface and the fourth sub-contact surface directly or indirectly intersect, so that the direction of the force transmitted to the third sub-contact surface and the fourth sub-contact surface is changed. Compared with the prior art, the four sides of the cross section of the insulation module are perpendicular to each other and are easily deformed under the action of force. In the example of this application, the second insulation module 270 is less likely to be deformed under the action of force, has stronger supporting capacity, can ensure the reliability of the use of the membrane storage tank, can reduce or even avoid the setting of the support structure in the prior art, and further simplify the structure of the membrane storage tank.

[0114] In the example of the present application, only the first sub-contact surface of the first insulation module 260 can be set to directly or indirectly intersect with the second sub-contact surface, or only the third sub-contact surface of the second insulation module 270 can be set to directly or indirectly intersect with the fourth sub-contact surface, or the first sub-contact surface of the first insulation module 260 can be set to directly or indirectly intersect with the second sub-contact surface, and the third sub-contact surface of the second insulation module 270 can be set to directly or indirectly intersect with the fourth sub-contact surface at the same time. The example of the present application does not impose specific restrictions on this.

[0115] Based on the membrane tank provided in the above example, please refer to Figure 5, along the direction from the primary shielding film 131 toward the secondary shielding film 132 , the first thermal insulation module 260 and the second thermal insulation module 270 are staggered.

[0116] Along the direction of the main shielding film 131 toward the secondary shielding film 132, the projection of the first insulation module 260 may partially overlap with the projection of the second insulation module 270, and the projection of the first insulation module 260 may also not overlap with the projection of the second insulation module 270. This application example does not impose any specific restrictions on this.

[0117] Compared with the aligned arrangement of the first insulation module 260 and the second insulation module 270, in the example of the present application, the first insulation module 260 and the second insulation module are staggered, which can extend the heat transfer path between different insulation modules, thereby reducing the heat conduction efficiency between the interior of the membrane storage tank and the external environment.

[0118] In addition, the first insulation module 260 and the second insulation module are staggered so that along the direction from the main shielding film 131 to the secondary shielding film 132, the support points provided by the first insulation module 260 for the secondary shielding film 132 and the support points provided by the second insulation module 270 for the secondary shielding film 132 are staggered, which is beneficial to further improve the support strength of the membrane storage tank.

[0119] The structures of the first sealed cavity 130 and the second sealed cavity 140 are similar, and the following description will only take the second sealed cavity 140 as an example.

[0120] Based on the membrane storage tank provided in the above example, a connector (not shown in the figure) is provided on the side of the second insulation module 270 facing the outer tank layer 141 , and the connector is connected to the outer tank layer 141 .

[0121] A connecting piece is provided on the side of the second insulation module 270 facing the outer tank layer 141 , that is, the connecting piece is provided on the fourth sub-connection side.

[0122] The connecting member may be a threaded member, a riveted member, etc. The connecting member may be integrally formed with the second insulation module 270, or may be fixedly connected to the second insulation module 270 by welding or other means, which is not specifically limited in this application example.

[0123] When the connecting piece is a threaded piece, a nut or other threaded structure is pre-embedded on the side of the outer tank layer 141 facing the second insulation module 270, so that the connecting piece extends into the outer tank layer 141 and is threadedly connected to the threaded structure, thereby realizing the connection between the outer tank layer 141 and the second insulation module 270.

[0124] When the connecting piece is a riveted piece, a metal plate structure can be pre-embedded on the side of the outer tank layer 141 facing the second insulation module 270. The plate structure is provided with a through hole so that the connecting piece can be extended into the outer tank layer 141 and riveted with the plate structure to realize the connection between the outer tank layer 141 and the second insulation module 270.

[0125] Figure 8 For a structural diagram of a plywood provided as an example for this application, please refer to Figure 8 The connecting member may also be a plywood sheet 300, which is connected to the side of the second insulation module 270 facing the outer tank layer 141. The plywood sheet 300 may be bonded to the fourth sub-connection side. The side of the plywood sheet 300 facing away from the second insulation module 270 may be directly or indirectly connected to the outer tank layer 141, thereby connecting the outer tank layer 141 to the second insulation module 270.

[0126] In the example of this application, the structure of the plywood 300 may be the same as or different from the structure of the existing plywood, and this example of this application does not impose any specific limitation on this.

[0127] The plywood 300 mentioned here can also be used between the second insulation module 270 and the secondary shielding film 132, between the first insulation module 260 and the secondary shielding film 132, and between the first insulation module 260 and the main shielding film 131. This application example does not limit this.

[0128] Exemplarily, the plywood 300 includes a third moisture-proof layer 310 and multiple wooden board layers glued together. The third moisture-proof layer 310 can be arranged between adjacent wooden board layers. The third moisture-proof layer 310 can also be arranged on the side of the wooden board layer closest to the secondary shielding film 132 among the multiple wooden board layers facing the secondary shielding film 132, or be arranged on the side of the wooden board layer closest to the outer tank layer 141 among the multiple wooden board layers facing the outer tank layer 141. There can be one or more third moisture-proof layers 310, and this application example does not impose any specific restrictions on this.

[0129] By providing the plywood 300 including a glued third moisture-proof layer 310 and multiple wooden board layers, the possibility of water vapor being transferred from the outer tank layer 141 to the secondary shielding film 132 through the plywood 300 can be reduced or even avoided, further ensuring the reliability of the use of the second insulation module 270 and making the thermal insulation performance of the film storage tank more reliable.

[0130] The connection member mentioned in this application includes at least one of a screw member, a rivet member, and a plywood 300 .

[0131] In the example of this application, the connecting piece is arranged on the side of the second insulation module 270 facing the outer tank layer 141, and the connecting piece can be connected to the outer tank layer 141. Therefore, a reliable connection between the second insulation module 270 and the outer tank layer 141 can be achieved through the connecting piece.

[0132] The second vacuum box can be welded to the main shielding film 131 and / or the secondary shielding film 132, and the first vacuum box can be welded to the secondary shielding film 132 and / or the outer tank layer 141. At this time, the structure of the second vacuum box is similar to that of the first vacuum box. Next, the structure of the second vacuum box and the first vacuum box will be described by taking the welding of the first vacuum box and the outer tank layer 141 as an example.

[0133] Exemplarily, the second insulation module 270 includes a first vacuum box, a first welding layer is provided on the side of the first vacuum box facing the outer tank layer 141, and a second welding layer is provided on the side of the outer tank layer 141 facing the first vacuum box, and the first welding layer and the second welding layer are welded.

[0134] The box wall of the first vacuum box close to the outer tank layer 141 includes a first welding layer and a vacuum layer. The first welding layer faces the outer tank layer 141, and the vacuum layer is set away from the outer tank layer 141. The thickness of the first welding layer needs to ensure that after the first welding layer and the second welding layer are welded, it will not affect the airtightness of the vacuum layer, thereby ensuring the performance of the first vacuum box.

[0135] The second welding layer is provided on the side of the outer tank layer 141 facing the first vacuum box. The second welding layer is a metal sheet structure or strip structure preset on the outer tank layer 141, and the second welding layer can be welded to the first welding layer.

[0136] In the example of this application, the first welding layer is arranged on the side of the first vacuum box facing the outer tank layer 141, and the second welding layer is arranged on the side of the outer tank layer 141 facing the first vacuum box. Therefore, the welding connection between the first welding layer and the second welding layer can achieve a reliable connection between the first vacuum box and the outer tank layer 141.

[0137] When the first insulation module 260 includes a second vacuum box, the connection method between different second vacuum boxes is similar to the connection method between different first vacuum boxes when the second insulation module 270 includes a first vacuum box. The following description will only take the second vacuum box as an example.

[0138] The outer tank layer 141 is provided with a first vent, the first insulation module 260 includes a second vacuum box, and the membrane storage tank also includes a first connecting structure and a first connecting pipe. The first connecting structure connects multiple second vacuum boxes, and the multiple connected second vacuum boxes pass through the first connecting pipe through the first vent and are connected to the first vacuum pump.

[0139] There may be one first vent, or multiple first vents may be provided at intervals. The number of first vents is equal to the number of first connecting pipes. A first vacuum pump may be connected to only one first connecting pipe, or a first vacuum pump may be connected to multiple first connecting pipes, and this example application does not impose any specific limitations on this.

[0140] When there is only one first vent, all second vacuum boxes within the first sealed cavity 130 can be connected in series and ultimately connected to the first vacuum pump via the first connecting pipe. Alternatively, the second vacuum boxes within the first sealed cavity 130 can be partially connected in series to form multiple series groups, and the multiple series groups can be connected in parallel to the first vacuum pump via the first connecting pipe.

[0141] The first communicating structure may be a valve structure, such as an interconnecting valve, or a communicating pipe. This example of the present application does not limit the specific structure of the first communicating structure.

[0142] There are multiple first communicating structures, and one first communicating structure can communicate with two adjacent second vacuum boxes.

[0143] The second vacuum box closest to the first vacuum pump among the plurality of second vacuum boxes is connected to the first vacuum pump through a first connecting pipe.

[0144] Since the second vacuum box is arranged in the first sealed cavity 130 and the first vent is arranged in the outer tank layer 141, the first connecting pipe connects the second vacuum box and the first vent, and needs to be passed through the secondary shielding film 132 and the outer tank layer 141. The connection between the first connecting pipe and the secondary shielding film 132 and the outer tank layer 141 is sealed respectively to ensure the sealing performance of the first sealed cavity 130 and the sealing performance of the second sealed cavity 140.

[0145] In the example of this application, two adjacent second vacuum boxes can be connected through the first connecting structure, and the connected multiple second vacuum boxes are connected to the first vacuum pump through the first connecting pipe, so that the first vacuum pump can vacuum the connected multiple second vacuum boxes through the first connecting pipe.

[0146] Based on the membrane storage tank provided in the above example, the first sealed cavity 130 is a vacuum cavity, and / or the second sealed cavity 140 is a vacuum cavity.

[0147] At least one of the first sealed cavity 130 and the second sealed cavity 140 is a vacuum cavity.

[0148] The outer tank layer 141 may be provided with a second vent, spaced apart from the first vent, and connected to the first sealed cavity 130 via a second connecting pipe. The second connecting pipe has an end facing away from the first sealed cavity 130 connected to a second vacuum pump. The second vacuum pump can be used to evacuate the first sealed cavity 130, thereby making it a vacuum cavity.

[0149] The operation of evacuating the second sealed cavity 140 is similar to the operation of evacuating the first sealed cavity 130 , and will not be described in detail in this example of the present application.

[0150] In the example of the present application, by setting the first sealed cavity 130 and / or the second sealed cavity 140 as a vacuum cavity, and providing a first insulation module 260 in the first sealed cavity 130 and a second insulation module 270 in the second sealed cavity 140, the efficiency of heat exchange between the inside of the membrane storage tank and the external environment can be further reduced, and the thermal insulation performance of the membrane storage tank can be further improved.

[0151] The film storage tank includes a matching side tank wall and a bottom tank wall. Correspondingly, the sealed cavity includes a first sub-cavity parallel to the side tank wall and a second sub-cavity parallel to the bottom tank wall. The first sub-cavity is communicated with the second sub-cavity.

[0152] Figure 6 For a structural diagram of a special-shaped insulation module provided as an example in this application, please refer to Figure 6 At the connection point between the first and second sub-cavities, a corresponding special-shaped insulation module 280 can be provided. The special-shaped insulation module 280 includes a first connecting surface and a second connecting surface that are perpendicular to each other. The first connecting surface is fixedly connected to the cavity wall of the first sub-cavity close to the tank side wall, and the second connecting surface is fixedly connected to the cavity wall of the second sub-cavity close to the tank bottom wall. The special-shaped insulation module 280 is generally "L"-shaped. Or, Figure 7 For the structural diagram of another special-shaped insulation module provided in this application example, please refer to Figure 7 The two first insulation modules 260 are connected and matched to form a special-shaped insulation module 280 , wherein the first connection side 210 of one insulation module 200 is perpendicular to the first connection side 210 of the other insulation module 200 .

[0153] The connection method between the special-shaped insulation module 280 and the cavity wall of the sealed cavity 100 is similar to the connection method between the insulation module 200 and the cavity wall of the sealed cavity 100, and this application example will not be described in detail here.

[0154] Based on the membrane storage tank provided in the above example, the first insulation module 260 includes a second vacuum box with a first support structure provided therein; and / or, the second insulation module 270 includes a first vacuum box with a second support structure provided therein.

[0155] The first supporting structure is similar to the second supporting structure, and the following description will only take the first supporting structure as an example.

[0156] The first support structure can be a reinforcing rib, a support column, etc. One end of the first support is connected to the side of the second vacuum box facing the primary shielding film 131 , and the other end of the first support is connected to the side of the second vacuum box facing the secondary shielding film 132 .

[0157] One or more first support members may be provided in the second vacuum box. Taking the case where the first support member is a reinforcing rib as an example, the reinforcing rib may be connected to the side box wall of the second vacuum box. The reinforcing rib may also be provided in the middle of the second vacuum box, independent of any side box wall of the second vacuum box.

[0158] When a plurality of reinforcing ribs are provided in the second vacuum box, the plurality of reinforcing ribs do not contact each other, and the box body of the second vacuum box divided by the reinforcing ribs includes a plurality of interconnected sub-cavities.

[0159] In this example, the first insulation module 260 includes a second vacuum box, which is provided with a first support structure. The provision of the first support structure further enhances the support strength of the second vacuum box, thereby enhancing the support strength of the membrane storage tank. The second support structure performs a similar function to the first support structure and will not be further described in this example.

[0160] A reflective screen may be provided in the second vacuum box. The reflective screen may be aluminum foil or a composite structure of aluminum foil and thermal insulation material.

[0161] By arranging a reflective screen in the second vacuum box, the absorption and emission of thermal radiation can be reduced, thereby reducing the efficiency of heat exchange between the interior of the membrane storage tank and the external environment.

[0162] The surface emissivity of the secondary shielding film 132 and the main shielding film 131 can be reduced by polishing, nickel plating, silver plating, etc., thereby reducing the efficiency of heat exchange between each part of the film storage tank and the external environment and ensuring the thermal insulation performance of the film storage tank.

[0163] When the first insulation modules 260 are spaced apart, a third support structure may be provided between two adjacent first insulation modules 260. When the second insulation modules 270 are spaced apart, a fourth support structure may be provided between two adjacent second insulation modules 270. The third and fourth support structures play similar roles to the first support structure, and are not described in detail in this application example.

[0164] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A membrane storage tank, characterized in that: It comprises a sealed cavity and a plurality of thermal insulation modules, wherein the plurality of thermal insulation modules are fixedly installed in the sealed cavity in sequence; The sealed cavity comprises a first cavity wall and a second cavity wall which are arranged opposite to each other; The thermal insulation module includes a first connecting side and a second connecting side disposed opposite to each other, and a first contact surface and a second contact surface disposed opposite to each other, wherein the first connecting side is fixedly connected to the first cavity wall, the second connecting side is fixedly connected to the second cavity wall, and the first contact surface and the second contact surface intersect directly or indirectly; The membrane storage tank includes a side tank wall and a bottom tank wall that match each other. The sealed chamber includes a first sub-chamber parallel to the side tank wall and a second sub-chamber parallel to the bottom tank wall. The first sub-chamber is connected to the second sub-chamber. The first sub-chamber and the second sub-chamber are both installed with the thermal insulation module. At the connection point between the first sub-chamber and the second sub-chamber, the thermal insulation module in the first sub-chamber is matched and connected with the thermal insulation module in the second sub-chamber. The first connection side of the thermal insulation module in the first sub-chamber is perpendicular to the first connection side of the thermal insulation module in the second sub-chamber. The membrane storage tank further includes plywood, which is connected between the insulation module and the first cavity wall; and / or, the plywood is connected between the insulation module and the second cavity wall, and the plywood includes a third moisture-proof layer and multiple wood board layers that are glued together.

2. The membrane storage tank according to claim 1, characterized in that: The thermal insulation module comprises a first moisture-proof layer and a thermal insulation layer connected to each other, wherein the first moisture-proof layer is provided on a side of the thermal insulation layer facing the second cavity wall; or The thermal insulation module is a vacuum box.

3. The membrane storage tank according to claim 1 or 2, characterized in that: The sealed cavity includes a first sealed cavity, and the thermal insulation module includes a first thermal insulation module; The film storage tank includes a main shielding film and a secondary shielding film, the secondary shielding film is spaced apart from the main shielding film, the secondary shielding film cooperates with the main shielding film to form the first sealed cavity, the first cavity wall includes a side of the main shielding film facing the secondary shielding film, and the second cavity wall includes a side of the secondary shielding film facing the main shielding film; Multiple first insulation modules are arranged in the first sealed cavity in sequence, and the first insulation module includes a first sub-connection side and a second sub-connection side that are relatively arranged, and a first sub-contact surface and a second sub-contact surface that are relatively arranged, the first connection side includes the first sub-connection side, the second connection side includes the second sub-connection side, the first contact surface includes the first sub-contact surface, the second contact surface includes the second sub-contact surface, the first sub-connection side is fixedly connected to the main shielding film, the second sub-connection side is fixedly connected to the secondary shielding film, and the first sub-contact surface and the second sub-contact surface directly or indirectly intersect.

4. The membrane storage tank according to claim 3, characterized in that: The first sub-connection side is in surface contact with the primary shielding film, and the second sub-connection side is in surface contact with the secondary shielding film.

5. The membrane storage tank according to claim 3, characterized in that: The main shielding film comprises a plurality of connected main shielding sub-films, and the connecting gap between two adjacent main shielding sub-films is located in the middle of the first sub-connection side; The secondary shielding film includes a plurality of connected secondary shielding sub-films, and the connecting gap between two adjacent secondary shielding sub-films is located in the middle of the second sub-connection side.

6. The membrane storage tank according to claim 3, characterized in that: The sealed cavity further includes a second sealed cavity, and the thermal insulation module further includes a second thermal insulation module; The film storage tank includes an outer tank layer and a secondary shielding film, the outer tank layer and the secondary shielding film cooperate to form the second sealed cavity, the first cavity wall includes a side of the secondary shielding film facing the outer tank layer, and the second cavity wall includes a side of the outer tank layer facing the secondary shielding film; Multiple second insulation modules are arranged in sequence in the second sealed cavity, and the second insulation module includes a third sub-connection side and a fourth sub-connection side that are relatively arranged, and a third sub-contact surface and a fourth sub-contact surface that are relatively arranged, the first connection side includes the third sub-connection side, the second connection side includes the fourth sub-connection side, the first contact surface includes the third sub-contact surface, the second contact surface includes the fourth sub-contact surface, the third sub-connection side is fixedly connected to the secondary shielding film, the fourth sub-connection side is connected to the outer tank layer, and the third sub-contact surface and the fourth sub-contact surface directly or indirectly intersect.

7. The membrane storage tank according to claim 6, characterized in that: Along the direction from the primary shielding film to the secondary shielding film, the first thermal insulation module and the second thermal insulation module are staggered.

8. The membrane storage tank according to claim 6, characterized in that: The second insulation module includes a first vacuum box, a first welding layer is provided on the side of the first vacuum box facing the outer tank layer, a second welding layer is provided on the side of the outer tank layer facing the first vacuum box, and the first welding layer is welded to the second welding layer.

9. The membrane storage tank according to claim 6, characterized in that: The outer tank layer is provided with a first vent, and the first insulation module includes a second vacuum box; The membrane storage tank further includes a first connecting structure and a first connecting pipe. The first connecting structure is connected to a plurality of second vacuum boxes. The plurality of connected second vacuum boxes pass through the first connecting pipe out of the first vent and are connected to the first vacuum pump.

10. The membrane storage tank according to claim 6, characterized in that: The first insulation module includes a second vacuum box, and a first support structure is provided in the second vacuum box; and / or the second insulation module includes a first vacuum box, and a second support structure is provided in the first vacuum box.

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