CN112498584A - LNG ship, film type containment system - Google Patents
LNG ship, film type containment system Download PDFInfo
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- CN112498584A CN112498584A CN202011194349.5A CN202011194349A CN112498584A CN 112498584 A CN112498584 A CN 112498584A CN 202011194349 A CN202011194349 A CN 202011194349A CN 112498584 A CN112498584 A CN 112498584A
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- shielding layer
- sealing
- insulation
- insulating
- containment system
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/68—Panellings; Linings, e.g. for insulating purposes
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an LNG ship and a film type containment system, wherein the film type containment system comprises a first sealing shielding layer, a second sealing shielding layer which is arranged on the outer side of the first sealing shielding layer and connected with the first sealing shielding layer through a first insulating structure, and a second insulating structure which is arranged on the outer side of the second sealing shielding layer and fixed with the second sealing shielding layer and a ship body structure respectively; the sensor is characterized in that a main shielding space is formed by a hole in the first insulating structure and a gap between the first insulating structure and the first sealing shielding layer, a secondary shielding space is formed by a hole in the second insulating structure and a gap between the second insulating structure and the second sealing shielding layer, and protective gas is filled in the main shielding space and the secondary shielding space and the sensor is installed in the main shielding space and the secondary shielding space. The invention builds a double-channel sealed ultra-low temperature LNG storage carrier, and solves the problems of LNG storage and leakage prevention.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to an LNG ship and a film type enclosure system thereof.
Background
The demand of liquefied natural gas as a green, clean and high-calorific-value energy source in China is in a rapidly increasing trend, and the supply and demand gaps are rapidly expanded. Therefore, natural gas resources are introduced from overseas, energy structures are adjusted, energy shortage is made up, the requirement of increasingly accelerated national economic development on emerging energy is met, and the method becomes an important decision for implementing energy strategies in China. However, since lng is stored and transported at an ultra-low temperature of-163 ℃, a cargo hold containment type in direct contact with lng is very important.
The liquid cargo containment systems of large LNG ships currently used in real ships are of spherical tank type (MOSS), Membrane type (Membrane) and SPB type. The spherical tank type cargo hold is developed by Norwegian Rosenberg company, the storage tank of the cargo hold is spherical, the cargo hold has no limit on the loading liquid level, the storage tank is made of aluminum alloy A5083, the periphery of the storage tank is covered by polyurethane insulation material, the manufacturing cost is high, and the weight is heavy. The film cargo hold is developed by France GTT company, and has NO.96 type, Mark III type and CS1 type, the three types all use 0.7 mm thick metal film as cargo hold lining, and are provided with insulating material and secondary isolating layer, after the layers are mutually fixed, the metal film is tightly connected with the hull, but the metal film has limited capability of bearing liquid cargo sloshing load, the cargo hold has complex structural style and long construction period. The SPB type cargo hold is a cargo hold form developed by the Nippon Shichuan island research and development and heavy industry (IHI), and is of a rib plate structure constructed by 9 nickel steel, so that the cargo hold is complex in structural form and high in manufacturing cost. In addition, a KC-1 film liquid cargo containment system has been developed in korea, in which the main layer film and the sub-layer film are both made of metal materials with a thickness of 1.5 mm, but the two films are the same, and have complicated structures and great prefabrication difficulty.
Disclosure of Invention
In view of this, the present invention provides an LNG ship and a film type containment system thereof, in which a first insulation structure is disposed between a first sealed shielding layer and a second sealed shielding layer, a second insulation structure is disposed between the second sealed shielding layer and a hull structure, and a primary shielding space formed by a pore inside the first insulation structure and a gap between the first insulation structure and the first sealed shielding layer, and a secondary shielding space formed by a pore inside the second insulation structure and a gap between the second insulation structure and the second sealed shielding layer are utilized to effectively construct a dual-sealed ultra-low temperature LNG storage carrier.
An LNG ship membrane-type containment system comprising:
a first containment barrier in direct contact with the liquefied natural gas,
the second sealing shielding layer is arranged on the outer side of the first sealing shielding layer and is connected with the first sealing shielding layer through a first insulating structure;
the second insulation structure is arranged on the outer side of the second sealing shielding layer and is respectively fixed with the second sealing shielding layer and the ship structure;
the gas leakage detection device comprises a first insulation structure, a second insulation structure, a first sealing shielding layer, a second sealing shielding layer, a sensor and a gas leakage detection circuit, wherein a main shielding space is formed by a hole in the first insulation structure and a gap between the first insulation structure and the first sealing shielding layer, a secondary shielding space is formed by a hole in the second insulation structure and a gap between the second insulation structure and the second sealing shielding layer, and protective gas is filled in the main shielding space and the secondary shielding space and the sensor is installed to detect whether natural gas leakage exists or not.
Preferably, the first insulating structure comprises a plurality of first insulating layers arranged at equal intervals and glass wool filled in gaps between the adjacent first insulating layers.
Preferably, the first insulating layer includes an insulating box with a hollow inner portion and a first insulating material filled in the insulating box, an anchoring member is fixed to an inner end face of the insulating box, a clamping groove is formed in an outer end face of the insulating box, and the anchoring member is welded and fixed to the first sealing shielding layer.
Preferably, the anchoring member is a plate-shaped structure provided with a plurality of threaded holes, and the anchoring member is fixed on the inner end surface of the insulating box through bolts.
Preferably, the second insulating structure comprises a plurality of second insulating layers arranged at equal intervals and glass wool filled in gaps between the adjacent second insulating layers.
Preferably, the second insulating layer is composed of a first plywood, a second insulating material and a second plywood which are sequentially arranged from inside to outside, a groove is formed in the first plywood, a clamping tongue piece is arranged in the groove, one end of the clamping tongue piece is clamped in the groove, and the other end of the clamping tongue piece is clamped in a clamping groove of the insulating box after penetrating through the second sealing shielding layer;
the second plywood is bonded on the ship structure through epoxy resin.
Preferably, the latch piece is an L-shaped invar strip, the horizontal section of the latch piece is clamped in the groove, the vertical section of the latch piece is welded and fixed with the second sealing shielding layer, and the end part of the latch piece is clamped in the clamping groove of the insulating box;
the groove is a T-shaped groove.
Preferably, the second sealing shield layer and the insulating box are fixed by an adhesive.
Preferably, the first sealing and shielding layer is a stainless steel plate in a corrugated type;
the second sealing shielding layer is an invar tile board.
An LNG ship comprises the LNG ship film type containment system.
The invention has the beneficial effects that:
1. according to the film type enclosure system, the first insulation structure is arranged between the first sealing shielding layer and the second sealing shielding layer, the second insulation structure is arranged between the second sealing shielding layer and the ship structure, and the first insulation space formed by the pores in the first insulation structure and the gap between the first insulation structure and the first sealing shielding layer, the first insulation space formed by the pores in the second insulation structure and the gap between the second insulation structure and the second sealing shielding layer are utilized, so that the double-channel sealed ultralow-temperature LNG storage carrier is effectively built, and the problems of LNG storage and leakage prevention are solved.
2. Set up first insulation system between first sealed shielding and the sealed shielding of second, not only can support first sealed shielding layer, can also play insulating thermal-insulated effect simultaneously, the card tongue piece card of second insulation system can fix a position the second insulation system in the draw-in groove of first insulation system's insulating case simultaneously to prevent that second insulation system from producing the removal, guaranteed envelope system's integrality.
3. The second insulating structure can prevent most cold energy from being conducted, the steel plate of the ship body is ensured to be within an allowable working temperature range, and the safety of the enclosure system is further improved.
4. By filling the glass wool between the adjacent insulating layers inside the first insulating structure and the second insulating structure, the insulating layers in the first insulating structure and the second insulating structure can move within a certain range under the action of elastic deformation of the glass wool so as to absorb the energy of expansion with heat and contraction with cold of the enclosure system, the overall performance of the enclosure system is greatly improved, and the safety and reliability of the enclosure system can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a film type enclosure system of the present invention.
Fig. 2 is a cross-sectional view of the thin film type enclosure system of the present invention.
Fig. 3 is a schematic view of the structure of the anchor.
Fig. 4 is a schematic view of the connection of the latch member and the insulating structure.
The reference numerals in the figures have the meaning:
1 is the first sealed shielding layer, 2 is the insulating case, 3 is the tongue piece, 4 is the second sealed shielding layer, 5 is first plywood, 6 is first insulating material, 7 is the second plywood, 8 is the hull structure, 9 is epoxy, 10 is the glass wool, 11 is the anchor assembly, 12 is the first insulating structure, 13 is the second insulating structure, 14 is the first insulating layer, 15 is the slot, 16 is the second insulating layer, 17 is the second insulating material.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected" and "fixed" are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides an LNG ship and a film type enclosure system thereof, wherein a first insulating structure 12 is arranged between a first sealing shielding layer 1 and a second sealing shielding layer 4, a second insulating structure 13 is arranged between the second sealing shielding layer 4 and a ship body structure 8, and a primary shielding space formed by a hole in the first insulating structure 12 and a gap between the first insulating structure 12 and the first sealing shielding layer 1, a secondary shielding space formed by a hole in the second insulating structure 13 and a gap between the second insulating structure 13 and the second sealing shielding layer 4 are utilized, so that a double-channel sealed ultralow-temperature LNG storage carrier is effectively built, and the problems of LNG storage and leakage prevention are solved.
The thin film type enclosure system in this embodiment is specifically a B-type enclosure system.
The thin film type enclosure system of the present invention includes a first airtight barrier layer 1, a first insulating structure 12, a second airtight barrier layer 4, and a second insulating structure 13.
The first sealing shielding layer 1 is in direct contact with the liquefied natural gas and is arranged on the innermost layer of the film type containment system.
The second hermetic barrier layer 4 is disposed outside the first hermetic barrier layer 1.
The second sealing shielding layer 4 is connected with the first sealing shielding layer 1 through the first insulating structure 12, and the first insulating structure 12 not only plays a role in supporting the first sealing shielding layer 1, but also plays a role in insulating and heat insulation.
The hole in the first insulating structure 12 and the gap between the first insulating structure 12 and the first sealing shielding layer 1 form a main shielding space, the main shielding space is filled with protective gas and is provided with a dangerous gas sensor for detecting whether natural gas leakage exists, and nitrogen can be selected as gas filled in the main shielding space. When the first sealing shielding layer 1 leaks, the second sealing shielding layer 4 can receive the leaked low-temperature liquid, so that the ship body steel plate is prevented from being brittle and cracked due to the contact of the ship body structure and the low-temperature liquid, and the safety of the ship is ensured.
Specifically, the first insulating structure 12 includes a plurality of first insulating layers 14 distributed in a matrix at equal intervals, and glass wool 10 filled in the gaps between adjacent first insulating layers 14. The first insulating layer 14 includes an insulating case 2 having a hollow inside and a first insulating material 6 filled in the insulating case 2.
The first insulating material 6 is polyurethane foam. The pores present inside the first insulating material 6 itself, the pores present inside the glass wool 10 itself, and the gap between the entire first insulating structure 12 and the first sealing-and-shielding layer 1 together constitute a secondary shielding space. Because the glass wool 10 has elasticity, when the enclosure system expands with heat and contracts with cold, the first insulating layer 14 can move in a certain range under the action of the elastic deformation of the glass wool 10 so as to absorb the energy of the enclosure system expanding with heat and contracting with cold, the overall performance of the enclosure system is greatly improved, and the safety and the reliability of the enclosure system can be ensured.
An anchoring part 11 is fixed on the inner end face of the insulating box 2, a clamping groove is formed in the outer end face of the insulating box, the anchoring part 11 is used for fixing a first sealing shielding layer 1, and the first sealing shielding layer 1 and the anchoring part 11 are welded and fixed. In this embodiment, the anchoring member 11 is a plate-shaped structure provided with a plurality of threaded holes, and the anchoring member 11 is fixed to the inner end surface of the insulating box 2 by bolts. The clamping groove is used for positioning the second insulating structure 13 to prevent the second insulating structure 13 from moving, the integrity of the enclosure system is ensured, and the second sealing shielding layer 4 is welded on the clamping tongue piece 3 of the second insulating structure 13.
The second insulating structure 13 is arranged outside the second sealing and shielding layer 4 and fixed with the second sealing and shielding layer 4 and the ship body structure 8 respectively.
The hole in the second insulating structure 13 and the gap between the second insulating structure 13 and the second sealing shielding layer 4 form a secondary shielding space, the secondary shielding space is filled with protective gas and is provided with a sensor for detecting whether natural gas leakage exists, and the gas filled in the secondary shielding space can be nitrogen.
The second insulating structure 13 is fixed on the ship body structure 8 through the epoxy resin 9, the second insulating structure 13 can prevent most cold energy from being conducted, the temperature conducted to the ship body steel plate is ensured to be within the working range of the ship body steel plate, the safety of the enclosure system is further ensured, and the possibility of brittle fracture of the ship body steel plate is further reduced.
Specifically, the second insulating structure 13 includes a plurality of second insulating layers 16 distributed in a matrix at equal intervals, and glass wool 10 filled in the gap between adjacent second insulating layers 16. Because the glass wool 10 has elasticity, when the enclosure system expands with heat and contracts with cold, the second insulating layer 16 can move in a certain range under the action of the elastic deformation of the glass wool 10 so as to absorb the energy of the enclosure system expanding with heat and contracting with cold, thereby greatly improving the overall performance of the enclosure system and ensuring the safety and reliability of the enclosure system.
The second insulating layer 16 is composed of a first plywood 5, a second insulating material 17 and a second plywood 7 which are arranged in sequence from inside to outside. The first and second veneers 5 and 7 are bonded to the inner and outer end faces of the second insulating material 17 respectively, and the second veneer 7 is bonded to the hull structure 8 by means of the epoxy resin 9.
The second insulating material 17 is polyurethane foam. The pores present inside the second insulating material 17 itself, the pores present inside the glass wool 10 itself, and the gap between the entire second insulating structure and the second sealing-shield layer 4 together constitute a secondary shielding space.
The first plywood 5 is provided with a groove 15, a clamping tongue piece 3 is arranged in the groove 15, one end of the clamping tongue piece 3 is clamped in the groove 15, and the other end of the clamping tongue piece 3 penetrates through the second sealing shielding layer 4 and then is clamped in a clamping groove of the insulation box 2. In this embodiment, the groove 15 is a T-shaped groove, the latch piece 3 is an L-shaped invar strip, the horizontal section of the latch piece 3 is clamped in the groove 15, the vertical section passes through the second sealing shielding layer 4 and is welded and fixed with the second sealing shielding layer 4, and the end of the vertical section is clamped in the clamping groove of the insulating box 2.
In order to ensure the stability of the connection between the second sealing shield layer 4 and the insulating box 2, the second sealing shield layer 4 and the insulating box 2 may be fixed by an adhesive.
Since the liquid LNG is an ultra-low temperature liquid at-163 ℃, the material of the first sealing and shielding layer which is required to be in direct contact with the LNG liquid can meet the requirement of low-temperature plasticity, and can overcome the problem of expansion and contraction when the temperature is reduced from normal temperature to low temperature, and meanwhile, the problems of structural form of the cargo hold, required evaporation rate and the like are considered for the selection of the heat insulation material, so in the embodiment, the first sealing and shielding layer 1 is made of stainless steel 304L and is prefabricated into a corrugated shape, and the expansion and contraction capacity of the first sealing and shielding layer 1 is enhanced. The second sealing shielding layer 4 is made of invar steel, and the invar steel is insensitive to cold and heat changes and is very suitable for low-temperature liquid.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An LNG carrier membrane type containment system, comprising:
a first containment barrier in direct contact with the liquefied natural gas,
the second sealing shielding layer is arranged on the outer side of the first sealing shielding layer and is connected with the first sealing shielding layer through a first insulating structure;
the second insulation structure is arranged on the outer side of the second sealing shielding layer and is respectively fixed with the second sealing shielding layer and the ship structure;
the gas leakage detection device comprises a first insulation structure, a second insulation structure, a first sealing shielding layer, a second sealing shielding layer, a sensor and a gas leakage detection circuit, wherein a main shielding space is formed by a hole in the first insulation structure and a gap between the first insulation structure and the first sealing shielding layer, a secondary shielding space is formed by a hole in the second insulation structure and a gap between the second insulation structure and the second sealing shielding layer, and protective gas is filled in the main shielding space and the secondary shielding space and the sensor is installed to detect whether natural gas leakage exists or not.
2. The LNG ship film type containment system of claim 1, wherein the first insulation structure comprises a plurality of first insulation layers disposed at equal intervals and glass wool filled in a gap between the adjacent first insulation layers.
3. The LNG carrier film-type containment system of claim 2, wherein the first insulating layer comprises an insulating box which is hollow inside and a first insulating material filled in the insulating box, an anchoring member is fixed to the inner end face of the insulating box, a clamping groove is formed in the outer end face of the insulating box, and the anchoring member is welded and fixed to the first sealing shielding layer.
4. The LNG carrier film-type containment system of claim 3, wherein the anchoring member is a plate-shaped structure provided with a plurality of threaded holes, and the anchoring member is fixed on the inner end surface of the insulation box by bolts.
5. The LNG ship film type containment system of claim 3, wherein the second insulation structure comprises a plurality of second insulation layers disposed at equal intervals and glass wool filled in gaps between the adjacent second insulation layers.
6. The LNG carrier film type containment system of claim 5, wherein the second insulation layer is composed of a first plywood, a second insulation material and a second plywood which are sequentially arranged from inside to outside, a groove is formed in the first plywood, a latch piece is arranged in the groove, one end of the latch piece is clamped in the groove, and the other end of the latch piece passes through the second sealing shielding layer and then is clamped in a clamping groove of the insulation box;
the second plywood is bonded on the ship structure through epoxy resin.
7. The LNG carrier film-type containment system of claim 6, wherein the latch pieces are L-shaped invar strips, horizontal sections of the latch pieces are clamped in the grooves, vertical sections of the latch pieces are welded and fixed with the second sealing shielding layer, and ends of the latch pieces are clamped in clamping grooves of the insulation box;
the groove is a T-shaped groove.
8. The LNG ship membrane-type containment system of claim 3 or 6, wherein the second airtight shield layer and the insulation box are fixed by an adhesive.
9. The LNG ship film type containment system of claim 1, wherein the first sealing shield layer is a corrugated type stainless steel plate;
the second sealing shielding layer is an invar tile board.
10. LNG ship, characterized in that it comprises a LNG ship membrane-type containment system according to any of claims 1-9.
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CN202011194349.5A CN112498584A (en) | 2020-10-30 | 2020-10-30 | LNG ship, film type containment system |
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CN202011194349.5A CN112498584A (en) | 2020-10-30 | 2020-10-30 | LNG ship, film type containment system |
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Cited By (5)
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CN113978626A (en) * | 2021-11-29 | 2022-01-28 | 沪东中华造船(集团)有限公司 | Magnetic suspension film type cargo containment system and LNG transport ship |
CN116857543A (en) * | 2023-09-04 | 2023-10-10 | 中太(苏州)氢能源科技有限公司 | Enclosure system for low-temperature storage tank and mounting process thereof |
CN117068326A (en) * | 2023-10-13 | 2023-11-17 | 沪东中华造船(集团)有限公司 | Film type enclosure system |
CN117508466A (en) * | 2023-11-08 | 2024-02-06 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
CN118665660A (en) * | 2024-08-22 | 2024-09-20 | 中太(苏州)氢能源科技有限公司 | Integrated mounting structure for marine equipment, storage container and manufacturing method |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113978626A (en) * | 2021-11-29 | 2022-01-28 | 沪东中华造船(集团)有限公司 | Magnetic suspension film type cargo containment system and LNG transport ship |
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CN117068326A (en) * | 2023-10-13 | 2023-11-17 | 沪东中华造船(集团)有限公司 | Film type enclosure system |
CN117068326B (en) * | 2023-10-13 | 2024-02-09 | 沪东中华造船(集团)有限公司 | Film type enclosure system |
CN117508466A (en) * | 2023-11-08 | 2024-02-06 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
CN117508466B (en) * | 2023-11-08 | 2024-04-09 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
CN118665660A (en) * | 2024-08-22 | 2024-09-20 | 中太(苏州)氢能源科技有限公司 | Integrated mounting structure for marine equipment, storage container and manufacturing method |
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