CN219192499U - Independent B-type cabin external heat insulation structure - Google Patents
Independent B-type cabin external heat insulation structure Download PDFInfo
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- CN219192499U CN219192499U CN202223266032.5U CN202223266032U CN219192499U CN 219192499 U CN219192499 U CN 219192499U CN 202223266032 U CN202223266032 U CN 202223266032U CN 219192499 U CN219192499 U CN 219192499U
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Abstract
An independent B-type cabin external heat insulation structure is provided, wherein the B-type cabin is provided with a main screen wall, a plate-type heat insulation layer is arranged outside the main screen wall, a gap exists between the plate-type heat insulation layer and the main screen wall, a leakage flow guide space is formed, the top of the B-type cabin is provided with a gas dome which extends upwards out of a deck, the top of the B-type cabin is provided with a gas dome plate, a gas dome pipe system penetrates through the gas dome plate, the B-type cabin is communicated with an external system pipeline through the gas dome pipe system, and the outer surface of the gas dome plate is sprayed with the heat insulation layer. The panel insulation extends all the way up to the gas dome plate, which refers to a panel insulation that is prefabricated using one or more layers of insulation material. The leakage diversion space is arranged between the whole heat insulating plate and the main shield, so that the main shield can almost completely cover the main shield area, once the low-temperature medium leaks, the leaked low-temperature medium can enter the whole leakage diversion space, the volume of the leakage diversion space is larger, the receiving and collecting capacity of the leakage medium is stronger, and the safety is higher.
Description
Technical Field
The utility model belongs to the technical field of marine ammonia fuel ship design and construction, and particularly relates to an independent B-type cabin external heat insulation structure.
Background
Currently, compared with traditional fuel propulsion, the ship adopts liquid LNG, LEG, liquid ammonia and other novel low-temperature mediums as the ship fuel to have an explosion rising trend. The low flash point fuel medium is stored and transported by ships, and is not separated from the low flash point fuel medium Wen Chucang. Conventional cryogenic tanks are classified as a type, B type, C type and film type. The type B tank has a prismatic geometry, is more suitable for placement in the cargo area below the deck of the ship than the cylindrical type C tank, has a greater cargo hold capacity utilization, and is particularly suitable for use in ships where cargo hold area space is sacrificed for LNG fuel storage, such as containers, bulk cargo, tankers, and the like. Compared with the A-type cabin and the film cabin, the B-type cabin can be independently built, the whole cabin is lifted and installed, the ship building period is not occupied, and the method has great advantages.
However, the B-type cryogenic storage cabin needs to solve the problem of storing cryogenic medium, and a heat insulation structure is usually sprayed outside the cabin main body structure (main shielding) to block heat transfer inside and outside the cabin, so as to achieve the cold insulation effect. It is common practice to spray a layer of insulation outside the B-type low temperature Chu Cang main shield and to provide a leakage flow path between the main shield and the insulation, the flow path being generally provided at the high risk leakage site of the main shield structure as a long and narrow semicircular path area, the insulation being in direct contact with the main shield. The defects of the design are that: the laying basis of the diversion channel is to cover the high risk leakage area of the cabin B, and the whole main shielding area of the cabin B cannot be completely covered; once leakage occurs to the diversion channel, the elongated semicircular channel is detrimental to liquid flow and leakage monitoring, presenting a certain safety risk.
Conventional contact insulation structure with leakage diversion channel as shown in fig. 1, conventional contact insulation structure with leakage diversion channel scheme laid outside the cryogenic storage cabin is generally laid in the area of potential leakage high risk of main shielding of cabin B. The leakage flow guide channels are communicated with each other, so that free flow of leakage liquid among the channels is facilitated.
Typically, the leakage guide channels are arranged in a semicircle, as shown in fig. 2, and are formed by a layer of aluminum foil or equivalent material, and the leakage guide channels are adhered to the high risk leakage area of the B-type cabin main shielding layer by low temperature glue. After the leakage diversion channel is installed, a heat insulation layer is sprayed outside the main shield. The spray-type heat insulation layer is in direct contact with the main shield, no other gaps exist, and leakage liquid is only drained through the leakage diversion channel.
Disclosure of Invention
In order to solve the problems, the utility model provides an independent B-type cabin external heat insulation structure, which adopts the following technical scheme:
an independent B-type cabin external heat insulation structure is provided, wherein the B-type cabin is provided with a main screen wall, a plate-type heat insulation layer is arranged outside the main screen wall, a gap exists between the plate-type heat insulation layer and the main screen wall, a leakage flow guide space is formed, the top of the B-type cabin is provided with a gas dome which extends upwards out of a deck, the top of the B-type cabin is provided with a gas dome plate, a gas dome pipe system penetrates through the gas dome plate, the B-type cabin is communicated with an external system pipeline through the gas dome pipe system, and the outer surface of the gas dome plate is sprayed with the heat insulation layer.
The plate-type heat insulating layer extends up to the gas dome plate, and the plate-type heat insulating layer is prefabricated and assembled by one or more layers of heat insulating materials and is fixed with the main shield of the B-type cabin through bolts.
The distance between the main screen wall and the plate-type heat insulation layer is 5-20 mm.
The independent B-type cabin exterior insulation structure is characterized in that the heat insulation material is EPS polystyrene or PU polyurethane material.
According to the independent B-type cabin external heat insulation structure, the leakage diversion space is further filled with nitrogen.
The independent B-type cabin external heat insulation structure further comprises two air dome pipes.
The independent B-type cabin external heat insulation structure is characterized in that the B-type cabin is fixed in a cargo hold in the hull.
According to the B-type low-temperature Chu Cang main shield external fixed heat insulating plate, the leakage flow guiding space is arranged between the whole heat insulating plate and the main shield, so that the main shield can almost entirely cover a main shielding area, once low-temperature medium leakage occurs in the main shield, the leaked low-temperature medium can enter the whole leakage flow guiding space, and compared with a conventional heat insulating structure with a semicircular leakage flow guiding channel, the leakage flow guiding space formed by plate type insulation can cover almost all the main shield leakage area, the volume of the leakage flow guiding space is larger, the carrying and collecting capacity of the leakage medium is stronger, and the safety is higher.
Drawings
FIG. 1 is a leak diversion passage laid outside a conventional cryogenic storage tank;
FIG. 2 is a conventional contact insulation structure with leakage diversion channels;
FIG. 3 is a schematic diagram of the structure of the present utility model;
FIG. 4 is a non-contact B-type cabin exterior insulation with leakage flow space;
wherein: 1-B type cabin, 2-main screen, 3-plate type heat insulation layer, 4-insulation layer, 5-leakage diversion space, 6-gas dome plate, 7-gas dome piping and 8-gas dome.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
The independent B-type cabin external heat insulation structure shown in fig. 3 and 4 adopts a plate-type heat insulation layer to be laid on the outer side of a main shield of the B-type cabin, and a certain interval is arranged between the plate-type heat insulation layer and the main shield, and the interval forms a leakage flow guide space. The low-temperature medium leaked from the leakage area enters the leakage diversion space for further collection and treatment.
The external insulation structure scheme of the non-contact type B cabin with the leakage diversion space is adopted. According to the scheme, through the arrangement of the completely-through leakage diversion space between the B-type cabin main shield and the plate-type heat insulation layer, the coverage of almost all leakage areas of the main shield is realized, and the low-temperature medium bearing capacity of the leakage diversion space is far stronger than that of a conventional scheme adopting a leakage diversion channel. The B-type low temperature Chu Cangding part is provided with an air dome structure, an air dome pipe system is arranged on the air dome top plate in a penetrating mode, and the air dome pipe system is a connection interface of the B-type low temperature Chu Cang and an external system pipeline. The upper part of the plate-type heat insulation layer laid outside the main shield of the B-type cabin is cut off to the air dome plate. Because the gas dome plate is required to be penetrated and provided with the gas dome pipe system, liquid leakage is hardly generated at the gas dome plate basically, and the scheme of spraying the heat insulation layer is adopted above the gas dome plate from the convenience of heat insulation layer construction, and a gap or a diversion channel is not required to be arranged between the sprayed heat insulation layer and the gas dome plate.
The plate-type heat insulation layer is a plate-type heat insulation layer prefabricated and assembled by one or two or more layers of heat insulation materials, the heat insulation materials are preferably EPS polystyrene or PU polyurethane materials, the plate-type heat insulation layer and the main shielding of the B-type cabin are fixedly installed through screws, the vertical interval between the plate-type heat insulation layer and the main shielding of the B-type cabin is preferably 5 mm-20 mm, the leakage diversion space is filled with nitrogen, the nitrogen is inert gas, the explosion risk of leaked combustible gas when meeting oxygen is avoided, and meanwhile, the nitrogen is filled in the annular space, so that the effect of enhancing the heat insulation effect of the heat insulation layer is achieved to a certain extent.
Claims (6)
1. An independent type B cabin exterior insulation structure, characterized in that: the B-type cabin is provided with a main screen wall, a plate-type heat insulation layer is arranged outside the main screen wall, a gap exists between the plate-type heat insulation layer and the main screen wall to form a leakage flow guiding space, the top of the B-type cabin is provided with a gas dome extending upwards from a deck, the gas dome is provided with a gas dome top plate, a gas dome pipe system penetrates through the gas dome top plate, the B-type cabin is communicated with an external system pipeline through the gas dome pipe system, and the outer surface of the gas dome plate is sprayed with the heat insulation layer;
the plate-type heat insulating layer extends up to the gas dome plate, and the plate-type heat insulating layer is prefabricated and assembled by one or more layers of heat insulating materials and is fixed with the main shield of the B-type cabin through bolts.
2. A freestanding B-mode cabin exterior insulation structure according to claim 1, wherein: the distance between the main screen wall and the plate-type heat insulation layer is 5-20 mm.
3. A freestanding B-mode cabin exterior insulation structure according to claim 1, wherein: the heat insulating material is EPS polystyrene or PU polyurethane material.
4. A freestanding B-mode cabin exterior insulation structure according to claim 1, wherein: the leakage diversion space is filled with nitrogen.
5. A freestanding B-mode cabin exterior insulation structure according to claim 1, wherein: the gas dome system is two gas domes.
6. A freestanding B-mode cabin exterior insulation structure according to claim 1, wherein: the B-type cabin is fixed in the cargo hold inside the ship body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223266032.5U CN219192499U (en) | 2022-12-07 | 2022-12-07 | Independent B-type cabin external heat insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223266032.5U CN219192499U (en) | 2022-12-07 | 2022-12-07 | Independent B-type cabin external heat insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219192499U true CN219192499U (en) | 2023-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223266032.5U Active CN219192499U (en) | 2022-12-07 | 2022-12-07 | Independent B-type cabin external heat insulation structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN219192499U (en) |
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2022
- 2022-12-07 CN CN202223266032.5U patent/CN219192499U/en active Active
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