CN117585108A - Method for installing thin film type enclosure system for bearing low-temperature liquid cargo - Google Patents
Method for installing thin film type enclosure system for bearing low-temperature liquid cargo Download PDFInfo
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- CN117585108A CN117585108A CN202311521364.XA CN202311521364A CN117585108A CN 117585108 A CN117585108 A CN 117585108A CN 202311521364 A CN202311521364 A CN 202311521364A CN 117585108 A CN117585108 A CN 117585108A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 239000010409 thin film Substances 0.000 title claims description 49
- 230000000149 penetrating effect Effects 0.000 claims abstract description 70
- 239000010408 film Substances 0.000 claims description 103
- 238000009413 insulation Methods 0.000 claims description 75
- 239000002184 metal Substances 0.000 claims description 68
- 238000007789 sealing Methods 0.000 claims description 47
- 238000003466 welding Methods 0.000 claims description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000011120 plywood Substances 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000011900 installation process Methods 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000004321 preservation Methods 0.000 description 17
- 239000007789 gas Substances 0.000 description 9
- 239000003292 glue Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000010964 304L stainless steel Substances 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/002—Storage in barges or on ships
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The embodiment of the invention provides a method for installing a film type containment system for bearing low-temperature liquid cargo, which comprises a main layer film layer, a fastening clamping plate, a main layer insulating layer, a sub-layer film layer and a sub-layer insulating layer which are sequentially connected and fixed on a ship body structure through penetrating fasteners.
Description
Technical Field
The invention relates to the technical field of equipment design for transporting and storing low-temperature liquid, in particular to a method for installing a thin film type enclosure system for bearing low-temperature liquid cargo.
Background
In transporting a gas such as natural gas or ethane gas, it is common to cool the gas to a low temperature and transport the liquefied gas for more economical long-distance transportation. The volume of the liquefied gas is greatly reduced, and the transportation cost is reduced. The liquefied low-temperature liquid is stored and transported by adopting a special low-temperature liquid cargo containment system.
In the current shipbuilding industry, cryogenic liquid cargo containment systems are primarily concerned with the manufacturing of LNG vessels. For LNG vessels, the international bulk transport liquefied gas vessel construction and equipment regulations (IGC regulations) define 4 broad classes of containment systems, type a, type B, type C and thin film containment systems, respectively. The thin film type enclosure system is widely applied due to the advantages of high cabin capacity utilization rate, good heat preservation performance, small wind resistance area and the like.
The existing thin film containment system technology mainly comprises Mark III type and NO 96 type, which are both from French GTT company. However, for the NO 96 type, as the main insulating modules and the secondary insulating modules are overlapped up and down, gaps between the main insulating modules and gaps between the secondary insulating modules are directly communicated to the ship body structure, and heat insulation materials such as glass wool are uniformly distributed at the gaps, but larger heat leakage exists at the gaps; for Mark III type, as the main layer insulating module, the secondary layer insulating module and the secondary layer film are mutually fixed and adhered into a whole through glue, and are fixed on the ship body structure through epoxy resin, the relative movement between the main layer insulating module and the secondary layer insulating module is limited, and the whole ship body movement resistance and liquid cargo sloshing resistance are poor; in addition, due to the fact that a large amount of glue is used, the construction period is long, and due to the fact that requirements on construction environment (humidity and temperature) and working procedures are strict, the period of the ship is prolonged.
Disclosure of Invention
In view of the above problems in the prior art, an embodiment of the present invention provides a method for installing a thin film type enclosure system for carrying a cryogenic liquid cargo, where the thin film type enclosure system is used for accommodating an ultralow temperature medium, and includes a main layer thin film layer, a fastening clip, a main layer insulating layer, a sub layer thin film layer and a sub layer insulating layer that are sequentially connected and fixed to a hull structure (a hull steel plate) through penetrating fasteners, a main layer shielding space is formed by using an internal space of the main layer insulating layer and a gap between the main layer insulating layer and the main layer thin film layer, and a sub shielding space is formed by using an internal space of the sub layer insulating layer and a gap between the sub layer insulating layer and the sub layer thin film layer.
The embodiment of the invention provides a method for installing a film type containment system for bearing low-temperature liquid cargo, wherein the film type containment system is used for containing ultra-low-temperature medium and comprises a main film layer, a fastening clamping plate, a main insulating layer, a sub film layer and a sub insulating layer which are sequentially connected and fixed on a ship body structure through penetrating fasteners, the main film layer, the main insulating layer, the sub film layer and the sub insulating layer are enclosed to form a low-temperature liquid cargo storage tank for containing the ultra-low-temperature medium, and the method for installing the film type containment system comprises the following steps:
installing a distance plate on a bulkhead of the ship body structure according to set scribing lines, and installing a secondary insulation module on the distance plate, wherein the secondary insulation modules in the plane area are all rectangular;
after the secondary insulation module is mounted on the distance plate, the secondary insulation module is mounted and fixed through the penetrating fastener, wherein a welding base for fixing the penetrating fastener is welded at a corresponding position of the ship body structure provided with the penetrating fastener;
after the installation of the sub-layer insulating layer is finished, the sub-layer film layer is installed, a sub-layer film in the sub-layer film layer is made of a flexible sealing material meeting the low temperature resistance condition, and in a plane area, the sub-layer film layer comprises a plurality of sub-layer films with preset sizes connected in a splicing mode, and each sub-layer film is adhered and fixed with a top plate arranged on the sub-insulating module;
after the installation of the sub-layer film layer is completed, the main insulating modules are installed, and in a plane area, each main insulating module is in compression connection with the upper sections of six penetrating fasteners which are respectively arranged at four corners of the main insulating module and at the middle points of two long sides of the main insulating module in a cuboid structure; after the four main insulation modules corresponding to the same corner are arranged, installing a corresponding compression structure of the penetrating fastener at the corner;
the fastening clamping plates are arranged at the upper parts of gaps formed by two adjacent main insulation modules and are in a cross-shaped structure or a straight-line structure;
after the fastening clamping plate is installed, the main layer film layer comprises a plurality of main layer films with preset sizes, which are connected in a splicing mode, and the boundary of each main layer film is welded and fixed with a fixed welding plate or a sealing metal sheet on the fastening clamping plate arranged on the main insulation module.
In some embodiments of the invention, installing a spacer on a bulkhead of a hull structure according to a set score line includes:
scribing is carried out on the bulkhead of the ship body structure, studs arranged perpendicular to the bulkhead are welded at the position, used for placing the distance plate, on the bulkhead according to the scribing, and the distance plate sleeved on the studs is installed, wherein four corners of the distance plate are symmetrically provided with four through holes corresponding to the center line of the distance plate, and each through hole is penetrated with a stud;
each stud on the distance plate corresponds to one corner of each of four different adjacent secondary insulation modules, wherein each secondary insulation module in the plane area is provided with a distance bolt hole at each of four corners, and the distance bolt holes are used for accommodating studs penetrating through the distance plate and fastening nuts in threaded connection with the studs.
In some embodiments of the present invention, the welding base includes a nut, the metal connecting rod penetrating the fastener is inserted into the mounting fixing hole in the middle of the secondary insulation module, and the cap rod structure penetrating the upper section of the fastener is screwed and fixed with the metal connecting rod, and the lower section of the penetrating fastener is used for anchoring the secondary insulation module in the planar area.
In some embodiments of the present invention, the metal plates at the bottom of the pressing blocks of the pressing structures of the penetrating fasteners are pressed on the middle plates of four adjacent main insulating modules in the same corner region, and the metal plates at the bottom of the pressing blocks of the pressing structures of the penetrating fasteners arranged at the midpoints of the long sides of the two adjacent main insulating modules are pressed on the middle plates of the adjacent main insulating modules, and the pressing structures are fixedly connected and locked with the upper ends of the metal connecting rods respectively.
In some embodiments of the present invention, the cross center of the cross-shaped fastening clip and the straight center of the straight fastening clip are both provided with a sealing metal sheet and a mounting fixing hole for arranging a penetrating fastener, and the four long strip edges of the cross-shaped fastening clip and the two long strip edges of the straight fastening clip are both fixedly provided with a fixing welding plate for welding and fixing with the main film layer.
In some embodiments of the present invention, the boundary of each main layer film is welded and fixed with a fixed welding plate or a sealing metal sheet on a fastening clamping plate provided on the main insulation module, which specifically includes:
the method comprises the steps of fixing a first main layer film installed on a welding plate on a fixed welding plate or a sealing metal sheet in a discontinuous spot welding mode, overlapping the main layer film adjacent to the first main layer film on the first main layer film, performing sealing welding on the whole edge of the overlapping part, welding the boundary of the main layer film on the sealing metal sheet, which is lapped in a through hole in the middle position of a fastening clamping plate, on the sealing metal sheet, and welding an upper end metal sealing cap penetrating through the upper section part of a fastening piece on the sealing metal sheet to realize sealing of the whole main layer film layer.
In some embodiments of the invention, the distance plate is made of plywood or plastic substitute material meeting the rigidity requirement, the thickness of the distance plate is set to be at least one of 1mm, 2mm, 5mm or 10mm, the distance plate is used for leveling, and the distance plate with different thickness is used for overlapping and combining, so that the distance between the bottom plate of the secondary insulation module and the bulkhead is 10mm; the aperture of the through hole on the distance plate is 0.5-2mm larger than the outer diameter of the screw thread on the stud.
In some embodiments of the invention, the bottom plate arranged on the bottom surface of the secondary insulation module close to the side of the distance plate is rectangular, openings for installing studs are formed at four corners, and the aperture of the opening on the bottom plate is 0.5-2mm larger than the outer diameter of the threads on the studs.
In some embodiments of the invention, in the process of installing the secondary insulation module at the upper part and the top of the bulkhead, the temporary stabilization is carried out by lifting the equipment after the secondary insulation module and the distance plate are installed, and after the cap rod structure penetrating through the upper section part of the fastener is screwed and fixed with the metal connecting rod, the lifting equipment is removed.
In some embodiments of the invention, the fastening clip is a board made of laminated wood or alternative materials meeting the rigidity requirement, and the thickness of the clip ranges from 6mm to 15mm; the upper end of the mounting fixing hole arranged on the fastening clamping plate is provided with a circular sealing metal sheet mounting groove with the diameter of 60-120mm and the depth of 1.5-3mm, and the groove is embedded with a sealing metal sheet with a central hole, the size of which is matched with that of the groove.
In some embodiments of the present invention, the main insulating layer includes a plurality of main insulating modules arranged at intervals in a matrix distribution, and a first gap between two adjacent main insulating modules is filled with a flexible thermal insulation material; the main insulating modules in the plane area are of cuboid structures, each main insulating module comprises a first top plate, an upper insulating block, a middle plate and a lower insulating block which are sequentially and fixedly connected from top to bottom, the first top plate is provided with a penetrating type stress release slit according to the structure of a main layer film layer covered on the first top plate, and the upper insulating block is provided with a non-penetrating type stress release slit which is aligned with the stress release slit arranged on the first top plate.
In some embodiments of the present invention, the sub-insulating layer includes a plurality of sub-insulating modules arranged in a matrix arrangement at intervals, and a second space between two adjacent sub-insulating modules is filled with a flexible thermal insulation material.
In some embodiments of the present invention, the secondary insulating modules located on the planar layer are in a cuboid structure, each secondary insulating module includes a second top plate, a cross reinforcing structure and a bottom plate which are fixedly connected in sequence from top to bottom, a heat insulation block is arranged between the second top plate and the bottom plate, the heat insulation block is fixedly arranged in a space formed by the second top plate, the bottom plate and the cross reinforcing structure, the heat insulation block has the same size and shape as the space, a mounting fixing hole for mounting a penetrating fastener is arranged at the cross center of the cross reinforcing structure, mounting fixing holes corresponding to the mounting fixing holes on the cross reinforcing structure are arranged on the second top plate and the bottom plate, and the second top plate is fixedly bonded with a sub-layer film in the sub-layer film layer.
In some embodiments of the invention, the space between the primary and secondary film layers forms a primary shielding space, the space between the secondary film layer and the hull structure forms a secondary shielding space, and the inert shielding gas is filled in both the primary and secondary shielding spaces.
Compared with the prior art, the thin film type enclosure system installation method for bearing low-temperature liquid cargo has the beneficial effects that: the primary insulation modules and the secondary insulation modules are staggered, so that the first gaps and the second gaps are staggered, and the integral heat leakage at the gaps is reduced; meanwhile, the use of glue is greatly reduced, the construction period is shortened, and the construction environment (humidity and temperature) and the process requirements are reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a thin-film containment system in a method for installing a thin-film containment system for carrying a low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 2 is a three-dimensional exploded view of a thin-film containment system in a method for installing a thin-film containment system for carrying a low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 3 is a three-dimensional exploded view of a main insulation module of a thin film containment system in a method for installing a thin film containment system for carrying a low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 4 is a three-dimensional exploded view of a secondary insulation module of a thin film containment system in a method for installing a thin film containment system for carrying a low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a secondary insulation module of a thin film containment system in a method for installing a thin film containment system for carrying a low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 6 is a three-dimensional exploded view of a linear fastening clamp plate of a thin film containment system in a method for installing the thin film containment system for carrying low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 7 is a three-dimensional exploded view of a cross-shaped fastening clamp plate of a thin film containment system in a method for installing the thin film containment system for carrying low-temperature liquid cargo according to an embodiment of the present invention;
FIG. 8 is a three-dimensional exploded view of a thin-film containment system penetrating fastener in a method for installing a thin-film containment system carrying a cryogenic liquid cargo according to an embodiment of the present invention;
reference numerals
The metal cap comprises a 1-penetrating fastener, a 2-secondary insulating layer, a 3-secondary film layer, a 4-primary insulating layer, a 5-primary film layer, a 6-fastening clamping plate, 7-resin strips, 8-distance plates, 9-second gaps, 10-first gaps, 11-primary film, 12-cross fastening clamping plates, 13-straight fastening clamping plates, 14-primary insulating modules, 15-secondary film, 16-secondary insulating modules, 17-first top plates, 18-penetrating stress relief slits, 19-upper heat-insulating blocks, 20-non-penetrating stress relief slits, 21-penetrating fastener mounting notches, 22-middle plates, 23-fixed cushion blocks, 24-lower heat-insulating blocks, 25-second top plates, 26-heat-insulating blocks, 27-cross reinforcing structures, 28-bottom plates, 29-mounting fixing holes, 30-distance bolt holes, 31-strip clamping plates, 32-sealing metal plates, 33-sealing metal plate mounting grooves, 34-fixed welding plate mounting grooves, 35-fixed welding plates, 36-base nuts, 37-38-sealing metal plates, 39-top plates, 40-threaded caps, 48-threaded caps, metal caps, 52-caps, nuts, 45-caps, 52-top plates, 45-threaded caps, 45-connecting plates, and 50-top caps, 48-connecting plates, 43-50-and a locking caps.
Detailed Description
The present invention will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present invention.
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
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.
It is also to be understood that, although the present application has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the present application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The foregoing and other aspects, features, and advantages of the present application will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repetitive functions and constructions are not described in detail to ascertain the true intent of the present application, based on the historical operations of the user, to avoid obscuring the application with unnecessary or redundant detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments as per the application.
The embodiment of the invention provides a method for installing a film type containment system for bearing low-temperature liquid cargo, as shown in fig. 1 to 8, wherein the film type containment system is used for containing ultra-low-temperature medium and comprises a main layer film layer 5, a fastening clamping plate 6, a main layer insulating layer 4, a secondary layer film layer 3 and a secondary layer insulating layer 2 which are sequentially connected and fixed on a ship body structure through penetrating fasteners 1, the main layer film layer 5, the main layer insulating layer 4, the secondary layer film layer 3 and the secondary layer insulating layer 2 are enclosed to form a low-temperature liquid cargo containment system for containing the ultra-low-temperature medium, and meanwhile, a main layer shielding space is formed by utilizing a space between the main layer film layer 5 and the secondary layer film layer 3 and a space between the secondary layer film layer 3 and the ship body structure (bulkhead), and the installation method comprises the following steps in a plane area in the film type containment system:
before installing the secondary insulation module, scribing is required to be carried out on the bulkhead of the ship body structure, studs arranged on the vertical bulkhead are welded on the bulkhead at positions for placing the distance plates 8 according to the scribing, and the distance plates 8 are installed and sleeved on the studs, wherein four corners of the distance plates 8 are symmetrically provided with four through holes about the central line of the distance plates 8, and each through hole is internally provided with a stud in a penetrating mode.
The penetrating fastener 1 includes: the upper section part and the lower section part, wherein the upper section part comprises a cap rod structure 41, a pressing structure, a double-headed screw rod 51 and a metal sealing cap 52, the pressing structure comprises a pressing block bottom metal plate 42, a disc spring 43, a locking cap 44, a locking plate 45, a bridge block 46, four springs 47, four long bolts 48, a pressing block top metal plate 49 and four gaskets 50; the lower section part comprises a welding base 36, a nut 37 contained in the welding base 36, a metal connecting rod 38 and a cutting thread 39 arranged at the upper end of the metal connecting rod 38, wherein a compression structure is arranged in an installation notch formed in an upper heat insulation block 19 of the main insulation module 14, the lower part of the compression structure is attached to a fixed cushion block 23, a cap rod structure 41 penetrates a connecting metal sheet 40 to be connected and fixed with the cutting thread 39 of the metal connecting rod 38, the connecting metal sheet 40 is fixed on a secondary film 15 at a corresponding position, and the cap rod structure 41 is locked with the compression structure; welding a welding base 36 of the penetrating fastener 1 at a corresponding position of the hull structure where the penetrating fastener 1 is placed, wherein the welding base comprises a nut 37, and a metal connecting rod 38 of the penetrating fastener 1 is installed on the welding base 36 through the nut 37, and the metal connecting rod 38 is penetrated in an installation fixing hole 29 arranged on the cross reinforcement structure 27 of the secondary insulation module 16.
Each stud on the distance plate 8 corresponds to one corner of four different adjacent secondary insulation modules 16, wherein the secondary insulation modules 16 in the plane area are provided with distance bolt holes 30 at four corners, and the distance bolt holes 30 are used for accommodating studs arranged on the distance plate 8 in a penetrating manner and fastening nuts in threaded connection with the studs; wherein each secondary insulation module 16 comprises a second top plate 25, a cross reinforcing structure 27 and a bottom plate 28 which are fixedly connected in sequence from top to bottom, the second top plate 25 is positioned at the top of each component in the secondary insulation module 16 and is a rectangular plate, meanwhile, each secondary insulation module 16 further comprises four heat preservation blocks 26, the second top plate 25 is fixedly adhered to the secondary layer film 15 in the secondary layer film layer 3, the cross reinforcing structure 27 is positioned below the second top plate 25, the periphery of the cross reinforcing structure 27 is overlapped with the second top plate 25, meanwhile, the cross reinforcing structure 27 and the second top plate 25 can be connected through glue or rivets, the bottom plate 28 is positioned below the cross reinforcing structure 27, the bottom plate 28 has the same size and shape as the second top plate 25, and the periphery of the bottom plate 28 is overlapped with the cross reinforcing structure 27 and the second top plate 25, the bottom plate 28 is connected with the cross reinforcing structure 27 by glue or rivets, a heat preservation block 26 is arranged between the second top plate 25 and the bottom plate 28, the heat preservation block 26 is fixedly arranged in a space formed by the second top plate 25, the bottom plate 28 and the cross reinforcing structure 27, the heat preservation block 26 has the same size and shape as the space, namely, the size and shape of the heat preservation block 26 can be determined according to the size and shape of the space formed by the periphery of the second top plate 25 and the bottom plate 28 and the cross reinforcing structure 27, meanwhile, the heat preservation block 26 fills the whole space and coincides with the periphery of the second top plate 25, the periphery of the bottom plate 28 and the periphery of the cross reinforcing structure 27, the contact parts of the heat preservation block 26, the second top plate 25, the bottom plate 28 and the cross reinforcing structure 27 are all fixedly connected by glue, the cross center of the cross reinforcing structure 27 is provided with a mounting fixing hole 29 for mounting a penetrating fastener, the second top plate 25 and the bottom plate 28 are respectively provided with a mounting and fixing hole 29 which is arranged corresponding to the mounting and fixing hole 29 on the cross-shaped reinforcing structure 27; that is, the secondary insulation module 16 having a rectangular parallelepiped structure is formed with a mounting fixing hole 29 for mounting and fixing the penetrating fastener 1 in the thickness direction at the center of the rectangular parallelepiped, and simultaneously, the bottom plate 28 is further provided with an opening concentrically arranged with the distance bolt hole 30, and the top plate 25 and the heat insulation block 26 are provided with the distance bolt hole 30 concentrically arranged with the through hole and having a hole diameter 2-4 times that of the through hole, thereby facilitating the gasket, the fastening nut and the fixture tool locking distance plate. Further, after the studs penetrating through the distance plates 8 on the four secondary insulating modules around each distance plate 8 are locked by nuts, the distance bolt holes 30 formed in each secondary insulating module 16 are filled with plungers made of the same material as the heat insulation blocks, so that the effect of interconnection between each secondary insulating module 16 is achieved, and an auxiliary anchoring effect is achieved on each secondary insulating module 16.
In this embodiment, the distance plate 8 is made of plywood or plastic substitute material meeting rigidity requirement, the thickness of the distance plate is set to be at least one of 1mm, 2mm, 5mm or 10mm, the distance plate is used for leveling, and the distance plate superposition combination with different thickness is adopted, so that the distance between the bottom plate 28 of the secondary insulation module 16 and the bulkhead is 10mm; the aperture of the through hole on the distance plate 8 is 0.5-2mm larger than the outer diameter of the thread on the stud.
After the secondary insulation module 16 is mounted on the distance plate 8, the penetrating fastener 1 is mounted, the metal connecting rod 38 of the penetrating fastener 1 is penetrated into the mounting fixing hole 29 in the middle of the secondary insulation module 16, the cap rod structure 41 (specifically, the cylindrical cap provided by the cap rod structure 41 of the upper section) of the penetrating fastener 1 is screwed and fixed with the metal connecting rod 38, the connection of the lower section of the penetrating fastener 1 plays a main anchoring role on each secondary insulation module 16 in the plane area, and meanwhile, the distance plate 8, the resin strip 7 and the use of the lower section of the penetrating fastener 1 can enable the secondary insulation layer 2 of the whole enclosure system to be effectively anchored on the inner bulkhead.
In this embodiment, in the process of installing the secondary insulation module 16 on the upper part and the top of the bulkhead, the lifting device is temporarily fixed after the secondary insulation module 16 and the distance plate 8 are installed, and the lifting device is removed after the cap rod structure 41 penetrating through the upper section of the fastener 1 is screwed and fixed with the metal connecting rod 38.
In addition, in the present embodiment, the bottom plate 28 of the secondary insulation module 16 has openings at four corners for mounting the studs, which have a diameter 0.5-2mm larger than the outer diameter of the threads on the studs.
After the installation of the sub-insulating layer 2, the installation of the sub-film layer 3 is performed, and the plurality of sub-films 15 with the second preset size connected in the splicing manner are respectively bonded and fixed with the second top plate 25 of the sub-insulating module 16.
The secondary insulating layer 2 comprises a plurality of secondary insulating modules 16 which are arranged at intervals in a matrix mode, and a second gap 9 between two adjacent secondary insulating modules 16 is filled with a material.
The secondary film layer 3 can bear ultra-low temperature medium through the secondary film layer 3 when the main film layer 5 leaks, so that the safety risk caused by the contact of the ship body structure and the ultra-low temperature medium is avoided, and the secondary film 15 is made of flexible sealing materials meeting the low temperature resistance condition.
After the installation of the sub-layer film layer 3 is completed, the main insulating modules 14 are installed, the main insulating layer 4 comprises a plurality of main insulating modules 14 which are arranged at intervals in a matrix mode, a first gap 10 between two adjacent main insulating modules 14 is filled with a flexible heat preservation material, the main insulating modules 14 in a plane area are of a cuboid structure, and the main insulating layer 4 is used for supporting and insulating heat of the main layer film layer 5; wherein the main insulating modules 14 at the planar layer are in a cuboid structure, each main insulating module comprises a first top plate 17, an upper insulating block 19, a middle plate 22 and a lower insulating block 24 which are fixedly connected in sequence from top to bottom, the first top plate 17 is positioned at the top of each component in the main insulating module 14 and is a rectangle plate, a penetrating stress release slot 18 is arranged according to the structure of the main layer film 11 covered on the first top plate 17, the upper insulating block 19 is positioned below the first top plate 17 and is also a rectangle plate, the upper insulating block 19 is fixedly connected with the first top plate 17 through glue, the upper insulating block 19 is provided with a non-penetrating stress release slot 20 which is aligned with the penetrating stress release slot 18 arranged on the first top plate 17, the rectangle area of the upper insulating block 19 is larger than that of the first top plate 17, the first top plate 17 is located in the rectangular middle of the upper heat-insulating block 19, specifically may be located in the rectangular center of the upper heat-insulating block 19, the middle plate 22 and the lower heat-insulating block 24 which are sequentially located at the lower part of the upper heat-insulating block 19 are the same as the upper heat-insulating block 19 in size, the middle plate 22 is fixedly connected with the upper heat-insulating block 19 through glue and completely coincides with the upper heat-insulating block 19, the lower heat-insulating block 24 is fixedly connected with the middle plate 22 through glue and completely coincides with the middle plate 22, through fastener installation notches 21 for installing through fasteners are respectively arranged at the midpoints of the four vertices and the long sides of the upper heat-insulating block 19 and the lower heat-insulating block 24, the shape and the size of the installation notches on the upper heat-insulating block 19 and the lower heat-insulating block 24 are the same, the middle plate 22 is provided with a fixed cushion block 23 at the midpoints of the four vertices and the long sides of the rectangle, the part of the fixed cushion block 23 in the lower heat preservation block 24 is matched with the shape of the penetrating fastener installation notch 21 on the lower heat preservation block 24, namely, the shape and the size of the fixed cushion block 23 are consistent with the shape and the size of the penetrating fastener installation notch 21 of the lower heat preservation block 24, the fixed cushion block 23 can fill up the installation notch formed on the lower heat preservation block 24, the part contacted with the lower heat preservation block 24 is fixed by gluing, and finally, the main insulation module 14 is formed by using two layers of non-metal plates and two layers of heat insulation materials;
further, as can be seen from the structure of the main insulation modules 14, in the planar area, each main insulation module 14 is in compression connection with the upper sections of six penetrating fasteners 1, and the six penetrating fasteners 1 are respectively arranged at four corners and the midpoints of two long sides of the main insulation module 14 which are arranged in a cuboid structure; after the four main insulating modules 14 corresponding to the same corner are arranged, corresponding pressing structures penetrating through the fasteners 1 are installed at the corners, the pressing block bottom metal plates 42 of the pressing structures are pressed on the middle plates 22 of the four adjacent main insulating modules 14, meanwhile, the pressing block bottom metal plates 42 of the pressing structures penetrating through the fasteners 1 arranged at the midpoints of the long sides of the two adjacent main insulating modules 14 are pressed on the middle plates 22 of the adjacent main insulating modules 14, and the pressing structures are fixedly connected and locked with the upper ends of the metal connecting rods respectively.
The fastening clip 6 is arranged at the upper part of a gap formed by two adjacent main insulation modules 14, the fastening clip 6 is in a cross structure or a straight structure, namely, the fastening clip 6 comprises a cross fastening clip 12 and a straight fastening clip 13, and is made of a nonmetal plate which is easy to process and has low temperature resistance, the upper surface of the fastening clip 6 is contacted with the main layer film layer 5, and a fixed welding plate mounting groove 34 for a fixed welding plate 35 welded with the main layer film 11 and a sealing metal plate mounting groove 33 for mounting a sealing metal plate 32 are arranged, and in particular, the fixed welding plate 35 for welded fixation with the main layer film 11 is fixedly arranged on four long sides of the cross fastening clip 12 and two long sides (the strip clip 31) of the straight fastening clip 13; meanwhile, the cross center of the cross-shaped fastening clamping plate 12 and the straight center of the straight-line-shaped fastening clamping plate 13 are respectively provided with a mounting and fixing hole 29 for arranging the penetrating fastener 1, so that the penetrating fastener 1 is convenient to mount and fix. As an example, the fastening clip 6 is a plate made of glued wood or an alternative material meeting the rigidity requirement, and the thickness of the clip ranges from 6mm to 15mm; the upper end of the mounting fixing hole 29 arranged on the fastening clamping plate 6 is provided with a circular sealing metal sheet mounting groove 33 with the diameter of 60-120mm and the depth of 1.5-3mm, and the groove is embedded with a sealing metal sheet 32 with a central hole, the size of which is matched with that of the groove.
After the fastening clip 6 is installed, the main film layer 5 is installed, and the boundary of each main film layer 11 is welded and fixed with the fixed welding plate 35 or the sealing metal sheet 32 on the fastening clip 6 on the main insulation module 14, specifically including: the primary film 11 of the first piece mounted on the welding plate is fixed to the fixed welding plate 35 or the sealing metal sheet 32 by intermittent spot welding, the primary film 11 adjacent to the primary film 11 of the first piece is lapped on the primary film 11 of the first piece, the lap joint part is subjected to sealing welding of the whole edge line, the boundary of the primary film 11 on the sealing metal sheet 32 lapped in the through hole in the middle part of the fastening clamping plate 6 is welded on the sealing metal sheet 32, and the upper end metal sealing cap 52 penetrating through the upper section part of the fastening piece 1 is welded on the sealing metal sheet 32, so that the sealing of the whole primary film layer 5 is realized.
In this embodiment, the main layer film 11 of the main layer film layer 5 is made of invar steel or 304L stainless steel material prefabricated to have a set corrugated shape.
In this embodiment, the boundary of each main layer film 11 is welded and fixed with the fixing welding plate 35 or the sealing metal sheet 32 on the fastening clip 6 provided on the main insulation module 14, specifically including: the primary film 11 of the first piece mounted on the welding plate is fixed to the fixed welding plate 35 or the sealing metal sheet 32 by intermittent spot welding, the primary film 11 adjacent to the primary film 11 of the first piece is lapped on the primary film 11 of the first piece, the lap joint part is subjected to sealing welding of the whole edge line, the boundary of the primary film 11 on the sealing metal sheet 32 lapped in the through hole in the middle part of the fastening clamping plate 6 is welded on the sealing metal sheet 32, and the upper end metal sealing cap 52 penetrating through the upper section part of the fastening piece 1 is welded on the sealing metal sheet 32, so that the sealing of the whole primary film layer 5 is realized.
In the above embodiment, the space between the main layer film layer 5 and the sub layer film layer 3 forms a main layer shielding space, the space between the sub layer insulating layer 2 and the hull structure forms a sub layer shielding space, inert shielding gas is filled in the main layer shielding space and the sub layer shielding space, and meanwhile, a temperature sensor and a combustible gas sensor are respectively installed in the main layer shielding space and the sub layer shielding space for detecting whether ultra-low temperature medium leakage exists.
In the above embodiment, the first top plate 17, the middle plate 22, the second top plate 25, the cross reinforcement structure 27 and the bottom plate 28 are made of a low temperature resistant nonmetallic material having a set strength, wherein the low temperature resistant nonmetallic material is at least capable of withstanding temperatures of-196 ℃ and the strength is 4.0MPa or more.
Meanwhile, the upper heat preservation block, the lower heat preservation block and the heat preservation block are made of materials meeting the set heat conductivity coefficient requirement, wherein the set heat conductivity coefficient requirement is that the heat conductivity coefficient is not more than 0.1W/(m.K).
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.
Claims (14)
1. A method of installing a thin film containment system for carrying cryogenic liquid cargo, the thin film containment system being adapted to contain cryogenic medium and comprising a primary thin film layer, a fastening clip, a primary insulating layer, a secondary thin film layer and a secondary insulating layer connected in sequence and secured to a hull structure by a through fastener, the primary thin film layer, the primary insulating layer, the secondary thin film layer and the secondary insulating layer enclosing to form a cryogenic liquid cargo storage tank for containing cryogenic medium, the method comprising, in a planar region in the thin film containment system:
a distance plate is arranged on a bulkhead of the ship body structure according to set scribing, and the secondary insulation module is arranged on the distance plate, wherein the secondary insulation modules in the plane area are all rectangular;
after the secondary insulation module is installed on the distance plate, the secondary insulation module is installed and fixed through a penetrating fastener, wherein a welding base for fixing the penetrating fastener is welded at a corresponding position of a ship body structure provided with the penetrating fastener;
after the installation of the sub-layer insulating layer is finished, installing a sub-layer film layer, wherein the sub-layer film in the sub-layer film layer is made of a flexible sealing material meeting the low temperature resistance condition, and in a plane area, the sub-layer film layer comprises a plurality of sub-layer films with preset sizes connected in a splicing mode, and each sub-layer film is adhered and fixed with a top plate arranged on a sub-insulating module;
after the installation of the sub-layer film layer is completed, the main insulating modules are installed, and in a plane area, each main insulating module is in compression connection with the upper sections of six penetrating fasteners, and the six penetrating fasteners are respectively arranged at four corners of the main insulating module and the middle points of two long sides, which are arranged in a cuboid structure; after the four main insulation modules corresponding to the same corner are arranged, installing a corresponding compression structure of the penetrating fastener at the corner;
the fastening clamping plates are arranged at the upper parts of gaps formed by two adjacent main insulation modules, and are in a cross-shaped structure or a straight-line structure;
after the fastening clamping plate is installed, the main layer film layer comprises a plurality of main layer films with preset sizes, which are connected in a splicing mode, and the boundary of each main layer film is welded and fixed with a fixed welding plate or a sealing metal sheet on the fastening clamping plate arranged on the main insulation module.
2. The method for installing a thin film containment system for carrying a cryogenic liquid cargo according to claim 1, wherein installing a spacer on a bulkhead of a hull structure according to a set score line comprises:
scribing is carried out on the bulkhead of the ship body structure, studs arranged perpendicular to the bulkhead are welded at the position, used for placing the distance plate, on the bulkhead according to scribing, and the distance plate sleeved on the studs is installed, wherein four corners of the distance plate are symmetrically provided with four through holes corresponding to the central line of the distance plate, and each through hole is internally provided with a stud in a penetrating mode;
each stud on the distance plate corresponds to one corner of each of four different adjacent secondary insulation modules, wherein each secondary insulation module in the plane area is provided with a distance bolt hole at each of four corners, and the distance bolt holes are used for accommodating the studs arranged on the distance plate in a penetrating manner and fastening nuts in threaded connection with the studs.
3. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 2,
the welding base is internally provided with a nut, the metal connecting rod of the penetrating fastener penetrates through the mounting fixing hole in the middle of the secondary insulation module, the cap rod structure of the upper section of the penetrating fastener is screwed and fixed with the metal connecting rod, and the lower section of the penetrating fastener is used for anchoring the secondary insulation module in a plane area.
4. A method for installing a film enclosure system for carrying a cryogenic liquid cargo in accordance with claim 3,
the pressing block bottom metal plates of the pressing structures of the penetrating fasteners are pressed on the middle plates of four adjacent main insulation modules in the same corner area, pressing block bottom metal plates of the pressing structures of the penetrating fasteners, which are arranged at the middle points of the long sides of the two adjacent main insulation modules, are pressed on the middle plates of the adjacent main insulation modules, and the pressing structures are fixedly connected and locked with the upper ends of the metal connecting rods respectively.
5. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 4,
the cross center of cross fastening cardboard and be the style of calligraphy center of a style of calligraphy fastening cardboard all be equipped with sealed sheetmetal and be used for setting up the installation fixed orifices of penetrating the fastener, four rectangular limits of cross fastening cardboard with two rectangular limits of style of calligraphy fastening cardboard all set firmly the fixed welded plate that is used for with main layer film layer welded fastening.
6. The method for installing a thin film containment system for carrying a cryogenic liquid cargo according to claim 5, wherein the boundary of each main layer of thin film is welded and fixed with a fixed welding plate or a sealing metal sheet on a fastening clamping plate arranged on a main insulation module, and the method specifically comprises the following steps:
the method comprises the steps of fixing a first main layer film installed on a welding plate on a fixed welding plate or a sealing metal sheet in a discontinuous spot welding mode, overlapping the main layer film adjacent to the first main layer film on the first main layer film, performing sealing welding on the whole edge of the overlapping part, welding the boundary of the main layer film on the sealing metal sheet, which is lapped in a through hole in the middle position of a fastening clamping plate, on the sealing metal sheet, and welding an upper end metal sealing cap penetrating through the upper section of a fastening piece on the sealing metal sheet to realize sealing of the whole main layer film layer.
7. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 6,
the distance plate is made of plywood or plastic substitute materials meeting the rigidity requirement, the thickness of the distance plate is at least one of 1mm, 2mm, 5mm or 10mm, the distance plate is used for leveling, and the distance plate with different thickness is used for overlapping and combining, so that the distance between the bottom plate of the secondary insulation module and the bulkhead is 10mm; the aperture of the through hole on the distance plate is 0.5-2mm larger than the outer diameter of the thread on the stud.
8. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 7,
the bottom plate material arranged at the bottom surface of the secondary insulation module close to the side of the distance plate is rectangular, openings for installing studs are formed in four corners, and the aperture of the opening on the bottom plate material is 0.5-2mm larger than the outer diameter of the threads on the studs.
9. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 8,
in the installation process of the secondary insulation module on the upper part and the top of the bulkhead, the secondary insulation module and the distance plate are installed, temporary stabilization is carried out by lifting equipment, and after the cap rod structure penetrating through the upper section part of the fastener is screwed and fixed with the metal connecting rod, the lifting equipment is withdrawn.
10. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 9,
the fastening clamping plate is made of laminated wood or a plate made of a substitute material meeting the rigidity requirement, and the thickness of the clamping plate ranges from 6mm to 15mm; the upper end of the mounting fixing hole on the fastening clamping plate is provided with a circular sealing metal sheet mounting groove with the diameter of 60-120mm and the depth of 1.5-3mm, and the groove is embedded with a sealing metal sheet with a central hole, the size of which is matched with that of the groove.
11. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 10,
the main layer insulating layer comprises a plurality of main insulating modules which are arranged at intervals in a matrix distribution manner, and a first gap between two adjacent main insulating modules is filled with a flexible heat insulation material; the main insulating modules in the plane area are of cuboid structures, each main insulating module comprises a first top plate, an upper insulating block, a middle plate and a lower insulating block which are sequentially and fixedly connected from top to bottom, the first top plate is provided with a penetrating type stress release slit according to the structure of a main layer film layer covered on the first top plate, and the upper insulating block is provided with a non-penetrating type stress release slit which is aligned with the stress release slit arranged on the first top plate.
12. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 11,
the secondary insulating layer comprises a plurality of secondary insulating modules which are arranged at intervals in a matrix distribution mode, and a second gap between two adjacent secondary insulating modules is filled with flexible heat-insulating materials.
13. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 12,
the secondary insulation modules in the plane layers are of cuboid structures, each secondary insulation module comprises a second top plate, a cross reinforcing structure and a bottom plate which are sequentially and fixedly connected from top to bottom, an insulation block is arranged between the second top plate and the bottom plate, the insulation block is fixedly arranged in a space formed by the second top plate, the bottom plate and the cross reinforcing structure, the insulation block is identical to the space in size and shape, the cross center of the cross reinforcing structure is provided with a mounting fixing hole for mounting penetrating fasteners, the second top plate and the bottom plate are respectively provided with a mounting fixing hole corresponding to the mounting fixing hole on the cross reinforcing structure, and the second top plate is fixedly bonded with a secondary layer film in the secondary layer film layer.
14. The method of installing a thin film containment system for a cryogenic liquid cargo of claim 13,
the space between the main layer film layer and the secondary layer film layer forms a main layer shielding space, the space between the secondary layer film layer and the ship body structure forms a secondary shielding space, and inert protective gas is filled in the main layer shielding space and the secondary layer shielding space.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311521364.XA CN117585108A (en) | 2023-11-14 | 2023-11-14 | Method for installing thin film type enclosure system for bearing low-temperature liquid cargo |
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| CN202311521364.XA CN117585108A (en) | 2023-11-14 | 2023-11-14 | Method for installing thin film type enclosure system for bearing low-temperature liquid cargo |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117818844A (en) * | 2024-03-06 | 2024-04-05 | 沪东中华造船(集团)有限公司 | Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation |
| CN117818821A (en) * | 2024-03-06 | 2024-04-05 | 沪东中华造船(集团)有限公司 | Film type enclosure system for low-temperature liquid cargo storage and transportation |
| CN117842286A (en) * | 2024-03-06 | 2024-04-09 | 沪东中华造船(集团)有限公司 | Film type low-temperature liquid cargo containment system |
-
2023
- 2023-11-14 CN CN202311521364.XA patent/CN117585108A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117818844A (en) * | 2024-03-06 | 2024-04-05 | 沪东中华造船(集团)有限公司 | Method for installing thin film type enclosure system for low-temperature liquid cargo storage and transportation |
| CN117818821A (en) * | 2024-03-06 | 2024-04-05 | 沪东中华造船(集团)有限公司 | Film type enclosure system for low-temperature liquid cargo storage and transportation |
| CN117842286A (en) * | 2024-03-06 | 2024-04-09 | 沪东中华造船(集团)有限公司 | Film type low-temperature liquid cargo containment system |
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