Three-face corner area layout structure for membrane-type containment system

Abstract

Embodiments of the present application provide a three-face corner area layout structure of a membrane-type containment system. The structure comprises a primary-layer membrane layer, a fastening clamping plate, a primary-layer insulating layer, a secondary-layer membrane layer and a secondary-layer insulating layer, which are connected in sequence and affixed to a ship body structure by means of penetrating fasteners, enclosingly forming a low-temperature liquid cargo storage tank used to contain an ultralow-temperature medium; three-face corner area modules are provided in corner areas joined to three side faces in the membrane-type containment system, a three-face corner area module comprising a three-face corner area primary-layer insulating layer module and a three-face corner area secondary-layer insulating layer module; the three-face corner area primary-layer insulating layer module comprises three primary-layer insulating surface structures which are disposed corresponding to three cabin wall faces of a three-face corner area of the ship body structure, respectively, and a gap between the contact position between the three-face corner area primary-layer insulating layer module and a primary insulating transition module of a planar area of the primary-layer insulating layer and a gap at the contact position between the three-face corner area secondary-layer insulating layer module and a secondary insulating transition module of a planar area of the secondary-layer insulating layer are located in different planes.

Description

A three-sided corner area layout structure of a membrane enclosure system

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311521316.0 filed on November 14, 2023, and cites the contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present application relates to the technical field of equipment for transporting and storing cryogenic liquids, and in particular to a trihedral angle arrangement structure of a membrane-type enclosure system. Background Art

[0004] When transporting gases like natural gas and ethane over long distances, it's common to cool the gas to low temperatures and liquefy it for more economical transport. This liquefied gas significantly reduces its volume, lowering transportation costs. The liquefied cryogenic liquid is stored and transported in specialized cryogenic cargo tanks.

[0005] In the current shipbuilding industry, cryogenic liquid cargo containment systems primarily involve the construction of LNG vessels. For LNG vessels, the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) defines four main types of containment systems: Type A, Type B, Type C, and membrane. Membrane containment systems are widely used due to their advantages, including high tank capacity utilization, excellent thermal insulation, and reduced wind resistance.

[0006] The existing membrane containment system technologies mainly include Mark III and NO 96, both of which are from the French company GTT. However, both containment systems have their own shortcomings. For the NO 96, since its main and secondary insulation modules are arranged in an overlapping manner, the gaps between the main insulation modules and the gaps between the secondary insulation modules are directly connected to the hull structure. Although insulation materials such as glass wool are evenly distributed in the gaps, there is still a large amount of heat leakage in the gaps. For the Mark III, since the main insulation modules, secondary insulation modules and secondary membranes are fixed to each other with glue and fixed to the hull structure with epoxy resin, the relative movement between the main and secondary insulation modules is restricted, and the overall resistance to hull movement and liquid cargo sloshing is poor. In addition, the large amount of glue used leads to a long construction period. Due to the strict requirements on the construction environment (humidity and temperature) and process, the delivery of the entire ship is delayed.

[0007] Summary of the Invention

[0008] In view of the above-mentioned problems existing in the prior art, an embodiment of the present application provides a three-sided corner area structure of a film-type enclosure system, which is used to accommodate ultra-low temperature media, including a main film layer, a fastening card plate, a main layer insulation layer, a secondary film layer and a secondary insulation layer, which are sequentially connected and fixed to the hull structure through penetrating fasteners. That is, a main layer insulation layer and a fastening card plate are arranged between the main film layer and the secondary film layer, and a secondary insulation layer is arranged between the secondary film layer and the hull structure. The main film layer, the fastening card plate, the main layer insulation layer, the secondary film layer and the secondary insulation layer are all connected and fixed to the hull structure through penetrating fasteners. At the same time, the main layer insulation structure and the gap between the main film layer and the secondary film layer form a main layer shielding space, and the secondary layer insulation structure and the gap between the secondary film layer and the hull structure form a secondary shielding space, which effectively builds a double-layer sealed ultra-low temperature medium storage carrier, solving the storage and leakage prevention problems of ultra-low temperature media.

[0009] The embodiment of the present application provides a trihedral corner area arrangement structure of a film-type enclosure system, comprising a main film layer, a fastening card plate, a main film layer, a secondary film layer and a secondary insulation layer, which are sequentially connected and fixed to the hull structure by through-fasteners. The main film layer, the main insulation layer, the secondary film layer and the secondary insulation layer enclose a low-temperature liquid cargo storage tank for accommodating ultra-low temperature medium, and the main film layer is in contact with the ultra-low temperature medium; a trihedral corner area module is provided at a corner area where three sides intersect in the film-type enclosure system, and the trihedral corner area module includes a trihedral corner area main insulation layer module and a trihedral corner area secondary insulation layer module, wherein,

[0010] The trihedral angle area secondary insulation layer module includes three secondary insulation surface structures respectively arranged corresponding to the three cabin walls of the trihedral angle area of ​​the hull structure. The angle between any two of the three secondary insulation surface structures is determined based on the angle between the corresponding cabin walls on both sides of the hull structure. Each trihedral angle area secondary insulation layer module is composed of three layers.

[0011] The trihedral angle main layer insulation layer module includes three main layer insulation surface structures respectively arranged corresponding to the three cabin walls of the trihedral angle area of ​​the hull structure. The angle between any two of the three main layer insulation surface structures is determined based on the angle between the corresponding cabin walls on both sides of the hull structure. Each trihedral angle main layer insulation layer module is composed of four layers.

[0012] The gap between the main insulating layer module in the trihedral corner area and the main insulating transition module in the plane area of ​​the main insulating layer and the gap between the secondary insulating layer module in the trihedral corner area and the secondary insulating transition module in the plane area of ​​the secondary insulating layer are in different planes.

[0013] In some embodiments of the present application, each trihedral angle area sub-layer insulation layer module respectively includes a first bottom plate, an insulation block and a metal welding plate which are sequentially bonded and fixed inwardly by the cabin wall surface, and the upper edge of the side where the insulation block is connected to the trihedral angle area sub-layer plane transition insulation module is formed with an inwardly concave stepped notch groove, and the trihedral angle area sub-layer plane transition insulation module forms an inwardly concave installation notch groove corresponding to the stepped notch groove on the upper edge of the side where it is connected to the insulation block. When the trihedral angle area sub-layer plane transition insulation module is bonded and fixed to the insulation block, it is bonded and fixed by the stepped notch groove and the pressing plate at the top of the installation notch groove; the trihedral angle area sub-layer plane transition insulation module includes a second top plate, four insulation blocks, a cross reinforcement structure, four central support structures and a second bottom plate, and the four insulation blocks are respectively arranged in the four spaces formed by the cross reinforcement structure between the second top plate and the second bottom plate, and the middle part of the four central support structures is provided with a through hole for installing a through fastener.

[0014] In some embodiments of the present application, each three-sided corner area main layer insulation layer module includes a first top plate, an upper insulation block, a middle plate and a lower insulation block arranged in sequence from the inner side away from the cabin wall to the side close to the cabin wall. The three-sided corner area main layer insulation layer module is provided with installation notches at the corners connected to the two-sided corner area main insulation layer module. Each installation notch is provided with a fixed pad fixedly connected to the middle plate. The fixed pad is adapted to the shape of the installation notch, and the installation notch is specifically opened on the lower insulation block of the three-sided corner area main layer insulation layer module.

[0015] In some embodiments of the present application, the width dimension of each of the three main layer insulation surface structures of the trihedral angle area main layer insulation layer module is greater than the width dimension of the secondary layer insulation surface structures respectively arranged corresponding to the three main layer insulation surface structures in the trihedral angle area secondary layer insulation layer module.

[0016] In some embodiments of the present application, a distance plug hole for installing a distance plate for the trihedral angle area secondary layer plane transition insulation module is provided on a step plane in the stepped notch groove that is parallel to the cabin wall surface where the stepped notch groove is located and at one end away from the main layer insulation layer module of the trihedral angle area.

[0017] In some embodiments of the present application, the trihedral angle area sub-layer planar transition insulation module further includes a sub-layer welding metal sheet, a sub-layer welding plate, a pressed sheet insulation block, and a pressed sheet plate, wherein the second top plate is provided with a welding plate groove and a welding plate groove, and after the sub-layer welding plate and the sub-layer welding metal sheet are respectively installed in the welding plate groove and the welding plate groove, the upper surface of the sub-layer welding plate and the upper surface of the sub-layer welding metal sheet are flush with the upper surface of the second top plate, and the sub-layer welding metal sheet is provided with a connection hole for installing a through fastener;

[0018] The second top plate and the second bottom plate are both provided with mounting and fixing holes corresponding to the through holes of the central support structure on the cross reinforcement structure. The mounting notch groove and the step notch groove are arranged correspondingly. When the trihedral angle area secondary insulation layer module and the trihedral angle area secondary plane transition insulation module are connected, the step notch groove and the bottom pressing plate of the mounting notch groove are bonded and fixed, the pressing insulation block is bonded and fixed to the pressing plate, the step notch groove and the mounting notch groove, and the upper part of the pressing insulation block is bonded and fixed to the second top plate.

[0019] In some embodiments of the present application, when the secondary planar transition insulation module in the trihedral angle area is bonded and fixed to the cabin wall of the hull structure through the second bottom plate, strips of epoxy resin are adhered at intervals between the second bottom plate and the cabin wall of the hull structure, and the height of the epoxy resin between the second bottom plate and the cabin wall of the hull structure is set to be greater than 12 mm and less than 20 mm according to the interval between the epoxy resins.

[0020] In some embodiments of the present application, the distance plate is made of plywood or a plastic alternative material that meets the rigidity requirements, and has a thickness of at least one of 1 mm, 2 mm, 5 mm, or 10 mm. The distance plate is used for leveling. By stacking and combining distance plates of different thicknesses, the distance between the bottom of the trihedral angle area sub-layer planar transition insulation module and the bottom of the trihedral angle area sub-layer planar transition insulation module and the cabin wall is 10 mm.

[0021] The diameter of the through hole on the distance plate is 0.5-2 mm larger than the outer diameter of the thread on the stud.

[0022] In some embodiments of the present application, the through fastener includes: a through fastener upper portion and a through fastener lower portion, wherein:

[0023] The upper section includes a cap rod structure, a clamping block, a double-headed screw and a metal sealing cap. The clamping block is arranged in the installation notches opened on the trihedral area main layer insulation layer module and the adjacent plane area main layer insulation layer module and dihedral area main layer insulation layer module. The bottom metal plate of the clamping block fits with the fixed pad, and the long bolt on the clamping block locks the clamping block.

[0024] The lower part of the through-fastener includes a cylindrical welding base and a metal connecting rod with threads at both ends. One end of the metal connecting rod passes through the secondary welding metal sheet and is fixedly connected to the cap rod structure, and the other end is welded and fixed to the hull structure through the set cylindrical welding base. The metal connecting rod is passed through the through hole of the central support structure of the cross reinforcement structure on the secondary plane transition insulation module in the trihedral angle area.

[0025] In some embodiments of the present application, each of the three cabin walls in the trihedral angle area of ​​the hull structure is perpendicular to at least one fixed pad, and the fixed pad is flush with the side of the lower insulation block and one side of the middle plate.

[0026] In some embodiments of the present application, the first top plate, the middle plate, the first bottom plate, the second top plate, the cross reinforcement structure, and the second bottom plate are all made of a low-temperature resistant non-metallic material with a set strength, wherein the low-temperature resistant non-metallic material can withstand a temperature of at least -196 degrees Celsius and the strength must meet the following requirements, specifically,

[0027] Vertical compression strength is greater than or equal to 4Mpa, bending strength is greater than or equal to 20Mpa, horizontal tensile strength is greater than or equal to 25Mpa, vertical tensile strength is greater than or equal to 1.5Mpa, and shear strength is greater than or equal to 2.5Mpa.

[0028] The heat-insulating block, the upper heat-insulating block, the lower heat-insulating block, the pressed heat-insulating block and the heat-insulating block are all made of materials that meet the set thermal conductivity requirements, wherein the set thermal conductivity requirements are that the thermal conductivity is not greater than 0.1 W / m·K;

[0029] The primary film and the secondary film are both made of Invar steel or 304L stainless steel or other low-temperature resistant metal materials that are prefabricated into a set corrugated shape.

[0030] In some embodiments of the present application, the cross reinforcement structure, except for the pressed sheet, has its periphery overlapped with the second top sheet and is connected to the second top sheet by glue or rivets;

[0031] The outer periphery of the second bottom plate, except for the installation notch groove, overlaps with the cross reinforcement structure and is connected to the cross reinforcement structure by glue or rivets;

[0032] The insulation block is connected and fixed with glue at the contact points with the second top plate, the second bottom plate and the cross reinforcement structure;

[0033] The pressed sheet is located at the bottom of the installation notch and is bonded and fixed to the adjacent insulation block by glue. The pressed sheet extends out of the second bottom sheet in the direction of the ship cabin wall parallel to the pressed sheet near the secondary insulation layer module in the trihedral angle area.

[0034] The tableting insulation block is located between the second top plate and the tableting plate;

[0035] The pressed sheet heat-insulating block and the second top plate, and the contact portions between the pressed sheet plate and the heat-insulating block are fixedly connected by glue.

[0036] Compared with the prior art, the beneficial effects of the trihedral corner area structure of the thin film-type enclosure system provided in the embodiment of the present application are: the trihedral corner area main layer insulation layer module and the trihedral corner area secondary layer insulation layer module are staggered, reducing the overall heat leakage at the gap; at the same time, the trihedral corner area secondary layer insulation layer module is bonded to the hull structure with epoxy resin, and the trihedral corner area main layer insulation layer module is connected by a through fastener. Since the through fastener has an elastic compression block, the trihedral corner area main layer insulation layer module and the trihedral corner area secondary layer insulation layer module have relative motion tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic diagram of the structural arrangement of the trihedral corner area of ​​the membrane enclosure system provided in an embodiment of the present application;

[0038] FIG2 is a cross-sectional schematic diagram of the structural arrangement of the trihedral corner area of ​​the membrane enclosure system provided in an embodiment of the present application;

[0039] FIG3 is a schematic diagram of a transition structure of a trihedral corner region of a trihedral corner region structure of a membrane enclosure system provided in an embodiment of the present application;

[0040] FIG4 is a schematic diagram of the arrangement of trihedral corner area modules of the trihedral corner area structure of the membrane enclosure system provided by an embodiment of the present application in a hull structure;

[0041] FIG5 is a schematic structural diagram of a trihedral corner insulation module structure of a trihedral corner structure of a thin film enclosure system according to an embodiment of the present application;

[0042] FIG6 is a schematic diagram of an explosion of a trihedral corner insulation module structure of a trihedral corner structure of a membrane enclosure system according to an embodiment of the present application;

[0043] FIG7 is an exploded schematic diagram of a through-fastener of a trihedral corner structure of a membrane enclosure system according to an embodiment of the present application;

[0044] FIG8 is a schematic diagram of a trihedral corner area sub-layer planar transition insulation module structure of a trihedral corner area structure of a thin film enclosure system according to an embodiment of the present application;

[0045] FIG9 is an exploded schematic diagram of a trihedral corner area sub-layer planar transition insulation module structure of a trihedral corner area structure of a thin film enclosure system according to an embodiment of the present application;

[0046] FIG10 is a schematic diagram of the installation of a secondary insulating layer and a secondary thin film layer in a trihedral corner structure of a thin film enclosure system according to an embodiment of the present application;

[0047] FIG11 is a schematic diagram of the installation of the main layer insulation layer of the trihedral corner structure of the membrane enclosure system provided by an embodiment of the present application;

[0048] FIG12 is a schematic diagram of the installation of the main film layer of the trihedral corner structure of the film enclosure system provided in an embodiment of the present application.

[0049] Reference numerals

[0050] 1. Welding base; 2. Nut; 3. Metal connecting rod; 4. Secondary welding metal sheet; 10. Lower section of through-fastener; 11. Cap rod structure; 12. Bottom metal plate; 19. Long bolt; 21. Pressing block; 22. Stud screw; 23. Metal sealing cap; 24. Primary welding metal sheet; 25. Upper section of through-fastener; 26. Hull structure; 27. Cabin wall; 28. Through-fastener; 29. ​​Epoxy resin; 31. Secondary insulation layer; 31a. Planar area secondary insulation layer module; 32. Secondary film layer. 32a, secondary film; 33, main insulation layer; 33a, plane area main insulation layer module; 34, main film layer; 34a, main film; 35, fastening plate; 35c, corner area transition plate; 36, distance plate; 37, stud; 38, main layer welding plate; 48, main layer insulation surface structure; 49, secondary insulation surface structure; 50, dihedral angle area secondary insulation layer module; 50a, 90° dihedral angle area secondary insulation layer module; 50b, 135° dihedral angle area secondary insulation layer module; 51, first bottom plate; 52, thermal insulation Block; 53, metal welding plate; 54, distance plunger hole; 55, distance bolt hole; 56, stepped notch groove; 60, dihedral angle area main insulation layer module; 60a, 90° dihedral angle area main insulation layer module; 60b, 135° dihedral angle area main insulation layer module; 61, upper insulation block; 62, lower insulation block; 63, first top plate; 64, middle plate; 65, fixing pad; 69, installation notch; 70, dihedral angle area plane transition secondary insulation layer module; 71, secondary layer welding plate; 72, second top plate; 73 , welding sheet groove; 74, welding plate groove; 75, pressed sheet insulation block; 76, insulation block; 77, cross reinforcement structure; 78, through hole; 79, central support structure; 80, second bottom plate; 81, pressed sheet plate; 82, installation notch groove; 83, secondary corner area transition film; 84, main layer corner area transition film; 85, secondary corner area film head; 90, trihedral corner area secondary layer plane transition insulation module; 100, trihedral corner area module; 101, trihedral corner area main layer insulation layer module; 102, trihedral corner area secondary layer insulation layer module; DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0052] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0053] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0054] It should also be understood that although the present application has been described with reference to certain specific examples, those skilled in the art will be able to implement many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0055] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0056] Specific embodiments of the present application will be described below with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present application and may be implemented in a variety of ways. Familiar and / or repetitive functions and structures are not described in detail to clarify the true intent based on the user's historical operations and to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details described herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any appropriate detailed structure.

[0057] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," which may all refer to one or more of the same or different embodiments according to the present application.

[0058] The embodiment of the present application provides a three-sided angle arrangement structure of a film-type enclosure system, as shown in Figures 1 to 12, wherein the film-type enclosure system includes a main film layer 34, a fastening card plate 35, a main layer insulation layer 33, a secondary film layer 32 and a secondary insulation layer 31 that are sequentially connected and fixed to the hull structure 26 through a through fastener 28, the main film layer 34, the main layer insulation layer 33, the secondary film layer 32 and the secondary insulation layer 31 enclose a low-temperature liquid cargo storage tank for accommodating ultra-low temperature media, and the main film layer 34 is in contact with the ultra-low temperature media. Specifically, by setting a main layer insulation layer 33 and a fastening card plate 35 between the main layer film layer 34 and the secondary layer film layer 32, and setting a secondary layer insulation layer 31 between the secondary layer film layer 32 and the hull structure, the main layer insulation structure and the gap between the main layer film layer 34 and the secondary layer film layer 32 form a main layer shielding space, and the secondary layer insulation structure and the gap between the secondary layer film layer 32 and the hull structure 26 form a secondary shielding space, effectively building a double-layer sealed ultra-low temperature medium storage carrier, solving the storage and leakage prevention problems of ultra-low temperature media.

[0059] In the film-type enclosure system, each corner area where three sides intersect is provided with a trihedral corner area module 100, which includes a trihedral corner area primary layer insulation layer module 101 and a trihedral corner area secondary layer insulation layer module 102. Specifically,

[0060] The trihedral angle area sub-layer insulation layer module 102 includes three sub-layer insulation surface structures 49 respectively arranged corresponding to the three cabin walls 27 of the trihedral angle area of ​​the hull structure 26. The angle between any two of the three sub-layer insulation surface structures 49 is determined based on the angle between the corresponding cabin walls 27 on both sides of the hull structure 26.

[0061] As an example, if the angle between the two cabin walls 27 is 90 degrees, the angle between the two sub-layer insulating surface structures 49 corresponding to the two cabin walls 27 can be 90 degrees, and accordingly, a 90° dihedral angle sub-insulating layer module 50a is set accordingly; of course, it can also be between 85 degrees and 95 degrees. If the angle between the two cabin walls 27 is 135 degrees, the angle between the two sub-layer insulating surface structures 49 corresponding to the two cabin walls can be 135 degrees, and accordingly, a 135° dihedral angle sub-insulating layer module 50b is set accordingly, and it can also be between 130 degrees and 140 degrees, that is, the angle between the two sub-layer insulating surface structures 49 can have an angular difference within a certain range from the angle between the corresponding two cabin walls.

[0062] Furthermore, each trihedral angle area sub-layer insulation layer module 102 is composed of a three-layer structure, which respectively includes a first bottom plate 51, an insulation block 52 and a metal welding plate 53 which are sequentially bonded and fixed inwardly by the cabin wall surface. The upper edge of the insulation block 52 on the side where it is connected to the trihedral angle area sub-layer plane transition insulation module 90 is formed with an inwardly recessed stepped notch groove 56. The trihedral angle area sub-layer plane transition insulation module 90 has an inwardly recessed installation notch groove 82 formed on the upper edge of the side where it is connected to the insulation block 52 and corresponding to the stepped notch groove 56.

[0063] When the secondary plane transition insulation module 90 is bonded and fixed to the heat insulation block 52 in the trihedral corner area, it is bonded and fixed through the stepped notch groove 56 and the pressing plate 81 at the top of the installation notch groove 82 .

[0064] In this embodiment, a distance plug hole 54 for installing a distance plate 36 for the trihedral angle area secondary layer plane transition insulation module 90 is provided in the stepped notch groove 56 on a step plane parallel to the cabin wall where the stepped notch groove 56 is located and at one end away from the trihedral angle area main layer insulation layer module.

[0065] The trihedral angle area sub-layer plane transition insulation module 90 includes a second top plate 72, four insulation blocks 76, a cross reinforcement structure 77, four central support structures 79 and a second bottom plate 80. The four insulation blocks 76 are respectively arranged in the four spaces formed by the cross reinforcement structure 77 between the second top plate 72 and the second bottom plate 80, and the middle part of the four central support structures 79 is provided with a through hole 78 for installing the through fastener 28.

[0066] In this embodiment, the second bottom plate 80 is further provided with a distance bolt hole 55 which is concentrically arranged with the through hole on the distance plate 36, and the second top plate 72 and the insulation block 76 are provided with a distance plunger hole 54 which is concentrically arranged with the through hole of the distance plate 36 and has a hole diameter of 2-4 times the hole diameter of the corresponding through hole, thereby facilitating the gasket, fastening nut and tooling tool to lock the distance plate 36. Furthermore, after the four studs 37 passing through each distance plate 36 are tightened by the nuts 2, the distance plug holes 54 opened on each trihedral angle area sub-layer plane transition insulation module 90 are filled with a plunger made of the same material as the insulation block 76, so that each trihedral angle area sub-layer plane transition insulation module 90 can be interconnected with the adjacent plane area sub-layer insulation layer module 31a or with the dihedral angle area sub-layer insulation layer module 50 and the trihedral angle area sub-layer insulation layer module 102, and plays an auxiliary anchoring role for the trihedral angle area sub-layer plane transition insulation module 90 and the adjacent plane area sub-layer insulation layer module 31a or with the dihedral angle area sub-layer insulation layer module 50.

[0067] Furthermore, the distance plate 36 is made of plywood or a plastic alternative material that meets the stiffness requirements, and the thickness is set to at least one of 1mm, 2mm, 5mm or 10mm. The distance plate 36 is used for leveling. By stacking and combining distance plates 36 of different thicknesses, the distance between the bottom of the trihedral angle area sub-layer plane transition insulation module 90, the adjacent plane area sub-layer insulation layer module 31a or the adjacent dihedral angle area sub-layer insulation layer module 50 and the cabin wall 27 is 10mm; the aperture of the through hole on the distance plate 36 is larger than the outer diameter of the thread on the stud by 0.5-2mm.

[0068] In this embodiment, the trihedral angle area main layer insulation layer module 101 includes three main layer insulation surface structures 48 corresponding to the three cabin walls 27 of the trihedral angle area of ​​the hull structure 26 and bonded and fixed thereto. The angle between any two of the three main layer insulation surface structures 48 is determined based on the angle between the corresponding cabin walls 27 on both sides of the hull structure 26. Each trihedral angle area main layer insulation layer module 101 is composed of a four-layer structure, including a first top plate 63, an upper insulation block 61, a middle plate 64, and a lower insulation block 62 bonded and fixed in sequence from the inner side away from the cabin wall to the side close to the cabin wall. The trihedral angle area main layer insulation layer module 101 is provided with installation notches 69 at the corners connected to the dihedral angle area main insulation layer module. Each installation notch 69 is provided with a fixing pad 65 fixed to the middle plate 64 and having a shape adapted to the installation notch 69 at the lower insulation block 62.

[0069] Among them, the gap at the connection position between the trihedral angle area main layer insulation layer module 101 and the plane area main layer insulation layer module 33a and the gap at the connection position between the trihedral angle area secondary layer insulation layer module 102 and the trihedral angle area secondary layer plane transition insulation module 90 are in different planes. As an example, in the trihedral angle area, in the direction of the three liquid cargo tank edges between the three cabin walls 27 corresponding to the trihedral angle area main layer insulation layer module 101, the length of the trihedral angle area main layer insulation layer module 101 on each edge is shorter than that of the trihedral angle area secondary layer insulation layer module, thereby ensuring that the gap between the trihedral angle area secondary layer insulation layer module and the adjacent dihedral angle area secondary insulation layer module and the gap between the trihedral angle area main insulation module and the adjacent dihedral angle area main insulation module do not overlap.

[0070] In some embodiments of the present application, the width dimension of each of the three main layer insulating surface structures 48 of the three-hedral angle area main layer insulating layer module 101 is greater than the width dimension of the secondary layer insulating surface structure 49 in the three-hedral angle area secondary layer insulating layer module 102 that is respectively arranged corresponding to the three main layer insulating surface structures 48.

[0071] In this embodiment, the trihedral angle area sub-layer planar transition insulation module 90 further includes a sub-layer welding metal sheet 4, a sub-layer welding plate 71, a press sheet insulation block 75, and a press sheet plate 81. The second top plate 72 is provided with a welding plate slot 74 and a welding plate slot 73. After the sub-layer welding metal sheet 4 and the sub-layer welding plate 71 are installed in the welding plate slot 73 and the welding plate slot 74, respectively, the upper surface of the sub-layer welding plate 71 and the upper surface of the sub-layer welding metal sheet 4 are flush with the upper surface of the second top plate 72. The sub-layer welding metal sheet 4 is provided with a connection hole for installing the through-fastener 28.

[0072] The second top plate 72 and the second bottom plate 80 are both provided with installation and fixing holes corresponding to the through holes 78 of the central support structure 79 on the cross reinforcement structure 77, and the installation notch groove 82 is arranged corresponding to the step notch groove 56. When the trihedral angle area sub-layer insulation layer module 102 is connected to the trihedral angle area sub-layer plane transition insulation module 90, the step notch groove 56 is bonded and fixed to the bottom pressing plate 81 of the installation notch groove 82, the pressing insulation block 75 is bonded and fixed to the pressing plate 81, the cabin wall of the step notch groove 56 and the cabin wall of the installation notch groove 82, and the upper part of the pressing insulation block 75 is bonded and fixed to the second top plate 72.

[0073] Furthermore, in this embodiment, when the secondary plane transition insulation module 90 in the trihedral angle area is bonded and fixed to the cabin wall 27 of the hull structure 26 through the second bottom plate 80, strips of epoxy resin 29 are adhered between the second bottom plate 80 and the cabin wall 27 of the hull structure 26, and the height of the epoxy resin 29 between the second bottom plate 80 and the cabin wall 27 of the hull structure 26 is set to be greater than 12 mm and less than 20 mm according to the distance between the epoxy resins 29.

[0074] In some embodiments of the present application, the through-fastener 28 includes: a through-fastener upper portion 25 and a through-fastener lower portion 10, wherein:

[0075] The upper portion 25 of the through-fastener includes a lower end cap rod structure 11, a clamping block 21, a double-headed screw 22, and a metal sealing cap 23. The clamping block 21 is provided on the trihedral main insulating layer module 101 and the adjacent planar main insulating layer module 33a and the dihedral main insulating layer module 60. The dihedral main insulating layer module 60 includes a 90° dihedral main insulating layer module 60a and a 135° dihedral main insulating layer module 60b. The bottom metal plate 12 of the clamping block 21 is in contact with the fixing pad 65. The long bolt 19 on the clamping block 21 locks the clamping block 21.

[0076] The lower section 10 of the through-fastener includes a cylindrical welding base 1 and a metal connecting rod 3 with threads at both ends, one end of which passes through the sub-layer welding metal sheet 4 and is fixedly connected to the lower end cap rod structure 11, and the other end is welded and fixed to the hull structure 26 through the set cylindrical welding base 1. The metal connecting rod 3 is inserted into the through hole 78 of the central support structure 79 of the cross reinforcement structure 77 on the sub-layer planar transition insulation module 90 in the trihedral angle area.

[0077] In this embodiment, each of the three cabin walls 27 in the trihedral angle area of ​​the hull structure 26 is perpendicularly arranged to at least one fixed pad 65, and the fixed pad 65 is flush with the side surface of one side of the lower insulation block 62 and the middle plate 64.

[0078] In some embodiments of the present application, the first top plate 63, the middle plate 64, the first bottom plate 51, the second top plate 72, the cross reinforcement structure 77 and the second bottom plate 80 are all made of a low-temperature resistant non-metallic material with a set strength, wherein the low-temperature resistant non-metallic material can withstand a temperature of at least -196 degrees Celsius and the strength must meet the following requirements, specifically,

[0079] The vertical compressive strength of low-temperature resistant non-metallic materials is greater than or equal to 4Mpa, the bending strength is greater than or equal to 20Mpa, the horizontal tensile strength is greater than or equal to 25Mpa, the vertical tensile strength is greater than or equal to 1.5Mpa, and the shear strength is greater than or equal to 2.5Mpa.

[0080] The heat-insulating block 52, the upper heat-insulating block 61, the lower heat-insulating block 62, the pressing heat-insulating block 75 and the heat-insulating block 76 are all made of materials that meet the set thermal conductivity requirements, wherein the set thermal conductivity requirements are that the thermal conductivity is not greater than 0.1 W / m·K;

[0081] The primary film layer 34 and the secondary film layer 32 are both made of Invar steel or 304L stainless steel or other low-temperature resistant metal materials that are prefabricated into a predetermined corrugated shape.

[0082] In some embodiments of the present application, the cross reinforcement structure 77 overlaps with the second top plate 72 at the periphery except for the pressing plate 81 and is connected to the second top plate 72 by glue or rivets;

[0083] The outer periphery of the second bottom plate 80, except for the pressing plate 81, overlaps with the cross reinforcement structure 77 and is connected to the cross reinforcement structure 77 by glue or rivets;

[0084] The insulation block 76 is connected and fixed with glue at the contact points with the second top plate 72, the second bottom plate 80 and the cross reinforcement structure 77;

[0085] The pressed sheet 81 is located at the bottom of the installation notch and is bonded to the adjacent insulation block 76 by glue. The pressed sheet 81 extends out of the second bottom plate 80 in the direction of the cabin wall 27 parallel to the pressed sheet 81 near the secondary insulation layer module 102 in the trihedral angle area.

[0086] The tableting insulation block 75 is located between the second top plate 72 and the tableting plate 81;

[0087] The contact points between the pressing plate 75 and the second top plate 72 , the pressing plate 81 and the insulation block 76 are fixedly connected by glue.

[0088] Specifically, when installing the above-mentioned trihedral angle arrangement structure of the membrane type enclosure system, the installation method includes:

[0089] Mark the cabin wall 27 of the hull structure 26, and then weld the welding base 1 of the lower portion 10 of the through-fastener 28 on the cabin wall 27 at the position for placing the through-fastener 28 according to the marking. Before welding, the nut 2 needs to be embedded in the welding base 1, and then weld the stud 37 of the distance plate 36 connecting the trihedral angle area sub-layer insulation layer module 102 and the trihedral angle area sub-layer plane transition insulation module 90. Of course, in the actual operation, it is also necessary to weld the welding base 1 of the lower portion 10 of the through-fastener for positioning the plane area sub-layer insulation layer module 31a and the corresponding stud 37 on the cabin wall according to the marking; wherein, four through holes are provided at the four corners of the distance plate 36 symmetrically about the center line of the distance plate 36, and a stud 37 is passed through each through hole;

[0090] After the studs 37 and the welding base 1 are installed, the metal connecting rods 3 that pass through the fasteners 28 and are fixedly connected to the welding base 1, as well as the installation distance plates 36 on the studs are installed. Of course, in the actual operation process, it can be based on the actual situation on site. For example, after all the metal connecting rods 3 that pass through the fasteners 28 are installed, it may affect the installation of the trihedral corner area sub-layer insulation layer module 102. In this case, the metal connecting rods 3 that pass through the fasteners 28 can be installed later, or only part of the metal connecting rods 3 that pass through the fasteners 28 can be installed, thereby achieving the goal of not affecting the installation of the trihedral corner area sub-layer insulation layer module 102. Among them, the trihedral corner area sub-layer planar transition insulation module 90 is provided with distance bolt holes 55 for passing the studs 37 in other corner areas except the corner area on one side connected to the trihedral corner area sub-layer insulation layer module 102, and is then connected to the plane area sub-layer insulation layer module 31a and the dihedral corner area planar transition sub-layer insulation layer module 70 through the distance plates 36.

[0091] After the distance plate 36 is sleeved on the stud 37 , the stud 37 passing through the distance plate 36 is extended into the distance plug hole 54 provided on the trihedral angle area secondary plane transition insulation module 90 .

[0092] After completing the installation of the studs 37 and installing the trihedral angle area sub-layer insulation layer module 102 in the trihedral angle area of ​​the hull structure 26 and bonding it, the through-fastener 28 is installed, and the metal connecting rod 3 of the through-fastener 28 is passed through the through hole 78 of the four central support structures 79 set on the trihedral angle area sub-layer plane transition insulation module 90, and the cap rod structure 11 of the upper part 25 of the through-fastener is screwed and fixed to the upper end of the metal connecting rod 3 and welded to the sub-layer welding metal sheet 4 embedded in the second top plate 72.

[0093] In this embodiment, one of the four central support structures 79 is located at the center of the cross of the cross reinforcement structure 77, two are located at the extended ends of two adjacent vertical plates in the cross of the cross reinforcement structure 77, and the other is arranged in a rectangular shape with the three central support structures 79 and is located at the end of the rectangle closest to the main insulating layer module 101 in the trihedral angle area. The four central support structures 79 can be formed by structural components directly fixedly connected to the cross reinforcement structure 77 or by central support structure components directly fixedly connected to the bottom plate of the secondary planar transition insulating module 90 in the trihedral angle area.

[0094] After the trihedral angle area sub-layer insulation layer module 102 and the trihedral angle area sub-layer planar transition insulation module 90 are installed, the sub-layer thin film layer 32 is installed. Of course, in the actual operation process, before installing the sub-layer thin film layer 32, the dihedral angle area sub-layer insulation layer module 50 and the dihedral angle area planar transition sub-layer insulation layer module 70 will be completed first. The dihedral angle area sub-insulation layer module 50 includes a 90° dihedral angle area sub-insulation layer module 50a and a 135° dihedral angle area sub-insulation layer module 50b. Then, at the same time, the planar area sub-layer insulation layer module 31a is installed, thereby forming a complete sub-layer insulation layer 31 installation. After that, the sub-layer thin film layer 32 is installed.

[0095] In this embodiment, the secondary film layer 32 is made of Invar steel or 304L stainless steel or other low-temperature resistant metal material prefabricated into a set corrugated shape, and the secondary film layer 32 may include a plurality of secondary films 32a with preset sizes connected in a splicing manner. Specifically, in the corner area where the three sides intersect, the secondary film 32a is provided with a secondary corner film head 85, and the secondary corner film head 85 is sealed and welded to the metal welding plate 53 of the three-sided corner secondary insulation layer module 102, so that the secondary insulation layer module 32a provided in the plane area is The secondary film 32a on 1a can be overlapped on the secondary corner film seal 85 to form a complete and sealed secondary film layer 32, and then the secondary film on the plane area secondary insulation layer module 31a can be installed in sequence. Similarly, for the corner area where two side surfaces intersect, the same method can be used to first complete the sealing welding and fixation of the edge of the secondary corner transition film 83 on the dihedral corner secondary insulation layer module 50, and then complete the installation of the secondary film 32a on the plane area secondary insulation layer module 31a, and finally form a complete secondary film layer 32;

[0096] After the installation of the secondary film layer 32 is completed, the installation of the trihedral corner main layer insulation layer module 101 is carried out, wherein the trihedral corner main layer insulation layer module 101 is compressed and fixed with the adjacent plane area main layer insulation layer module 33a or the dihedral corner main layer insulation layer module 60 by the compression block 21 of the upper part 25 of the through-fastener. The trihedral corner main layer insulation layer module 101 is equipped with four through-fasteners 28 for compression connection. The four through-fasteners 28 are respectively arranged at the four corners of the trihedral corner main layer insulation layer module 101;

[0097] After the trihedral angle main layer insulation layer module 101 and the adjacent dihedral angle main layer insulation layer module 60 and the plane area main layer insulation layer module 33a at the same corner are installed in place, the corresponding pressing block 21 penetrating the fastener 28 is installed in the corner area, and the bottom metal plate 12 of the pressing block 21 is simultaneously pressed on the fixed pad 65 fixed to the middle plate 64 of the trihedral angle main layer insulation layer module 101, the fixed pad 65 fixed to the middle plate 64 of the dihedral angle main layer insulation layer module, and the fixed pad 65 fixed to the middle plate 64 of the plane area main layer insulation layer module 33a, and is fixedly connected to the upper end of the metal connecting rod 3 and locked;

[0098] After the main insulating layer module 101 in the trihedral angle area is installed, the main thin film layer 34 is installed. Of course, in the actual operation process, before installing the main thin film layer 34, the dihedral angle area main insulating layer module and the plane area main insulating layer module 33a in the dihedral angle area will be installed first to form a complete main insulating layer 33, and then the main thin film layer 34 will be installed.

[0099] In this embodiment, the main layer film 34a is made of invar steel or 304L stainless steel or other low-temperature resistant metal materials prefabricated into a set corrugated shape. When installing the main layer film 34a in the corner area where the three sides intersect, the main layer film 34a adopts a transition film full coverage method. Three corner area main layer corner area transition films 84 are respectively arranged parallel to the three upper surfaces of the three-sided corner area main layer insulation layer modules that are arranged at an angle to each other, and are overlapped and welded to each other. A main layer welding plate 38 for fixing the main layer corner area transition film 84 is provided below the overlap position. The main layer welding plate 38 is provided on the corner area transition card plate 35c. Before overlap welding, a main layer corner area transition film 84 is point-welded. Welded to the main layer welding plate 38 on the corner area transition card plate 35c, and then welded in sequence the other two overlapping main layer corner area transition films 84, and then overlapped the main layer film on the plane area main layer insulation layer module on the main layer corner area transition film 84, and continuously welded the overlapping edges, and cyclically operate to form a complete and sealed three-sided corner area main layer film layer 34. Similarly, for the corner area where two side surfaces intersect, the same method can be used to first complete the sealing welding and fixation of the edge of the main layer corner area transition film 84 on the two-sided corner area main insulation layer module 60, and then complete the installation of the main layer film 34a on the main insulation module in the plane area, and finally form a complete main layer film layer 34.

[0100] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A three-sided corner area arrangement structure of a membrane type enclosure system, characterized in that: It includes a main film layer, a fastening card plate, a main insulating layer, a secondary film layer and a secondary insulating layer which are sequentially connected and fixed to the hull structure by penetrating fasteners, wherein the main film layer, the main insulating layer, the secondary film layer and the secondary insulating layer enclose a low-temperature liquid cargo storage tank for accommodating ultra-low temperature medium, and the main film layer is in contact with the ultra-low temperature medium; a trihedral corner area module is arranged in the corner area where the three sides intersect in the film-type enclosure system, and the trihedral corner area module includes a trihedral corner area main insulating layer module and a trihedral corner area secondary insulating layer module, wherein, The trihedral angle area sub-layer insulation layer module includes three sub-layer insulation surface structures respectively arranged corresponding to the three cabin walls of the trihedral angle area of ​​the hull structure, and the angle between any two of the three sub-layer insulation surface structures is determined based on the angle between the corresponding cabin walls on both sides of the hull structure, and each trihedral angle area sub-layer insulation layer module is composed of a three-layer structure; The trihedral angle area main layer insulation layer module comprises three main layer insulation surface structures respectively arranged corresponding to the three cabin walls of the trihedral angle area of ​​the hull structure, the angle between any two of the three main layer insulation surface structures is determined based on the angle between the corresponding cabin walls on both sides of the hull structure, and each trihedral angle area main layer insulation layer module is composed of four layers of structure; Among them, the gap at the contact position between the main insulating layer module in the trihedral angle area and the main insulating transition module in the plane area of ​​the main insulating layer and the gap at the contact position between the secondary insulating layer module in the trihedral angle area and the secondary insulating transition module in the plane area of ​​the secondary insulating layer are in different planes.

2. The trihedral angle area arrangement structure of the membrane type enclosure system according to claim 1 is characterized in that: Each trihedral angle area sub-layer insulation layer module comprises a first bottom plate, an insulation block and a metal welding plate which are sequentially bonded and fixed inwardly by the cabin wall surface, and the upper edge of the side where the insulation block is connected to the trihedral angle area sub-layer plane transition insulation module is formed with an inwardly concave stepped notch groove, and the trihedral angle area sub-layer plane transition insulation module forms an inwardly concave installation notch groove corresponding to the stepped notch groove at the upper edge of the side connected to the insulation block, and when the trihedral angle area sub-layer plane transition insulation module is bonded and fixed to the insulation block, it is bonded and fixed by the stepped notch groove and the pressing plate material at the top of the installation notch groove; the trihedral angle area sub-layer plane transition insulation module comprises a second top plate, four insulation blocks, a cross reinforcement structure, four central support structures and a second bottom plate, and the four insulation blocks are respectively arranged in four spaces formed by the cross reinforcement structure between the second top plate and the second bottom plate, and the middle part of the four central support structures is provided with a through hole for installing a through fastener.

3. The three-sided corner area arrangement structure of the membrane type enclosure system according to claim 2 is characterized in that: Each trihedral area main layer insulation layer module includes: A first top plate, an upper insulation block, a middle plate and a lower insulation block are arranged, and the main insulation layer module in the three-hedral angle area is provided with installation notches at the corners connected to the main insulation layer module in the two-hedral angle area, and each of the installation notches is provided with a fixed pad block fixedly connected to the middle plate, and the fixed pad block is adapted to the shape of the installation notch, and the installation notch is specifically opened on the lower insulation block of the main insulation layer module in the three-hedral angle area.

4. The trihedral angle arrangement structure of the membrane type enclosure system according to claim 3 is characterized in that: The width dimension of each of the three main insulating surface structures of the main insulating layer module in the trihedral angle area is greater than the width dimension of the secondary insulating surface structures in the trihedral angle area secondary insulating layer module respectively arranged corresponding to the three main insulating surface structures.

5. The three-sided corner area arrangement structure of the membrane type enclosure system according to claim 4 is characterized in that: A spacing plunger hole for installing a spacing plate of a trihedral angle area secondary plane transition insulation module is provided in the stepped notch groove on a step plane parallel to the cabin wall where the stepped notch groove is located and at one end away from the trihedral angle area main layer insulation layer module.

6. The trihedral angle arrangement structure of the membrane type enclosure system according to claim 5, characterized in that: The trihedral angle area secondary plane transition insulation module further comprises a secondary welding metal sheet, a secondary welding plate, a pressed sheet insulation block and a pressed sheet plate, wherein the second top plate is provided with a welding plate groove and a welding sheet groove, after the secondary welding plate and the secondary welding metal sheet are respectively installed in the welding plate groove and the welding sheet groove, the upper surface of the secondary welding plate and the upper surface of the secondary welding metal sheet are flush with the upper surface of the second top plate, and the secondary welding metal sheet is provided with a connection hole for installing a through fastener; The second top plate and the second bottom plate are both provided with installation and fixing holes corresponding to the through holes of the central supporting structure on the cross reinforcement structure, and the installation notch groove is arranged corresponding to the step notch groove. When the trihedral angle area sub-layer insulation layer module is connected to the trihedral angle area sub-layer plane transition insulation module, the step notch groove is bonded and fixed to the bottom pressing plate of the installation notch groove, the pressing insulation block is bonded and fixed to the pressing plate, the step notch groove and the installation notch groove, and the upper part of the pressing insulation block is bonded and fixed to the second top plate.

7. The trihedral angle arrangement structure of the membrane type enclosure system according to claim 6 is characterized in that: When the secondary plane transition insulation module in the trihedral angle area is bonded and fixed to the cabin wall of the hull structure through the second bottom plate, a strip of epoxy resin is adhered at a distance between the second bottom plate and the cabin wall of the hull structure, and the height of the epoxy resin between the second bottom plate and the cabin wall of the hull structure is set to be greater than 12 mm and less than 20 mm according to the distance between the epoxy resins.

8. The trihedral angle area arrangement structure of the membrane type enclosure system according to claim 7, characterized in that: The distance plate is made of plywood or a plastic substitute material that meets the rigidity requirements, and the thickness is set to At least one of 1mm, 2mm, 5mm or 10mm, the distance plate is used for leveling, and by stacking and combining distance plates of different thicknesses, the distance between the bottom of the trihedral angle area sub-layer plane transition insulation module and the bottom of the trihedral angle area sub-layer plane transition insulation module and the cabin wall is 10mm; The diameter of the through hole on the distance plate is 0.5-2 mm larger than the outer diameter of the thread on the stud.

9. The trihedral angle area arrangement structure of the membrane type enclosure system according to claim 8, characterized in that: The through fastener comprises: a through fastener upper section and a through fastener lower section, wherein: The upper section includes a cap rod structure, a clamping block and an upper end cap rod structure, wherein the clamping block is arranged in the installation notches opened on the main insulating layer module of the trihedral angle area and the adjacent main insulating layer module of the plane area and the main insulating layer module of the dihedral angle area, the bottom metal plate of the clamping block is fitted with the fixed pad, and the long bolt on the clamping block locks the clamping block; The lower section of the through-fastener includes a cylindrical welding base and a metal connecting rod with threads at both ends, one end of which passes through the sub-layer welding metal sheet and is fixedly connected to the cap rod structure, and the other end is welded and fixed to the hull structure through a set cylindrical welding base. The metal connecting rod is inserted into the through hole of the central supporting structure of the cross reinforcement structure on the sub-layer planar transition insulation module in the trihedral angle area.

10. The trihedral angle area arrangement structure of the membrane type enclosure system according to claim 9, characterized in that: Each of the three cabin walls in the trihedral angle area of ​​the hull structure is vertically arranged with at least one of the fixed pads, and the fixed pad is flush with the side surface of one side of the middle plate of the lower insulation block.

11. The trihedral angle arrangement structure of the membrane type enclosure system according to claim 10, characterized in that: The first top plate, the middle plate, the first bottom plate, the second top plate, the cross reinforcement structure and the second bottom plate are all made of low-temperature resistant non-metallic material with a set strength, wherein the low-temperature resistant non-metallic material can at least withstand a temperature of minus 196 degrees Celsius, and the strength must meet the following requirements, specifically, Vertical compression strength is greater than or equal to 4Mpa, bending strength is greater than or equal to 20Mpa, horizontal tensile strength is greater than or equal to 25Mpa, vertical tensile strength is greater than or equal to 1.5Mpa, and shear strength is greater than or equal to 2.5Mpa; The heat insulation block, the upper insulation block, the lower insulation block, the pressed sheet insulation block and the insulation block are all made of materials that meet the set thermal conductivity requirements, wherein the set thermal conductivity requirements are that the thermal conductivity is not greater than 0.1 W / m·K; The main film of the main film layer and the secondary film of the secondary film layer are both made of Invar steel or 304L stainless steel or other low-temperature resistant metal materials prefabricated into a set corrugated shape.

12. The trihedral angle arrangement structure of the membrane type enclosure system according to claim 11, characterized in that: The cross reinforcement structure, except for the pressed sheet, overlaps with the second top sheet at the periphery of the rest of the structure, and is connected to the second top sheet through Connecting with the second top plate by gluing or riveting; The second bottom plate overlaps the cross reinforcement structure at its periphery except for the installation notch groove, and is connected to the cross reinforcement structure by glue or rivets; The insulation block is connected and fixed with glue at the contact points with the second top plate, the second bottom plate and the cross reinforcement structure; The pressed sheet is located at the bottom of the installation notch and is bonded and fixed to the adjacent insulation block by glue. The pressed sheet extends out of the second bottom sheet in the direction of the cabin wall parallel to the pressed sheet near the secondary insulation layer module in the trihedral angle area; The tabletting insulation block is located between the second top plate and the tabletting plate; The contact points between the pressed sheet heat-insulating block and the second top plate, and between the pressed sheet plate and the heat-insulating block are fixedly connected by glue.

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