CN213948699U - Liquefied natural gas transport ship and liquefied natural gas transport system - Google Patents

Abstract

The utility model provides a liquefied natural gas transport ship and a liquefied natural gas transport system, which relate to the technical field of the ocean, wherein a ship body of the ship comprises a double-layer bottom plate, a double-side plate and a single-layer main deck; the double-layer bottom plate comprises a ship bottom outer plate, a ship bottom inner plate and a ship bottom rib plate; the double-side plate comprises a side outer plate, a side inner plate and a side reinforcing frame plate; the single-layer main deck comprises a deck body and a deck reinforcing structure; the liquid tank cabin is formed by surrounding among the inner bottom plate, the inner side plate and the deck body, and the deck reinforcing structure is arranged on the outer side face of the deck body. The liquefied natural gas transportation system comprises the ship. The utility model at least relieves the problem that the hull structure cabin capacity of the LNT A-BOX type liquefied gas carrier in the prior art is smaller; the whole weight of the ship body is heavy; the top in the cabin is lower, the laying of the secondary screen wall and the construction process of the supporting structure have great difficulty, the period is long, the cost is high, and the maintenance difficulty in the cabin is great.

Description

Liquefied natural gas transport ship and liquefied natural gas transport system

Technical Field

The utility model belongs to the technical field of the ocean technique and specifically relates to a liquefied natural gas transport ship and liquefied natural gas transportation system is related to.

Background

The main types of cargo tanks for bulk transport of liquefied gas vessels are membrane tanks and independent tanks, as defined by the international maritime organization. The independent liquid cargo tank can be subdivided into three types, namely type A, type B and type C, wherein the type A needs a complete secondary screen wall, the type B needs a partial secondary screen wall, and the type C is a pressure container and does not need a secondary screen wall; according to the requirements of the ship structure and equipment specification for bulk transport of liquefied gas (IGC) for short, when the temperature of the loaded goods in the independent cabin is lower than-10 ℃, a complete secondary screen wall needs to be arranged, so that the traditional A-type independent cabin generally transports the liquid goods above-55 ℃ because the structure of a ship body is used as the secondary screen wall of a goods containment system. The LNT A-BOX type independent cargo tank is formed by placing an independent liquefied natural gas tank in a completely insulated cabin, and has a stable self-supporting main shield and a completely independent secondary shield; based on the concept of an A-type independent tank, the LNTA-BOX type independent liquid cargo tank is used as a new cargo maintenance system, and a complete insulation system is arranged as a secondary screen wall, so that the influence of liquid cargo on a ship structure when the liquid cargo reaches the secondary screen wall after the leakage of a main screen wall is effectively prevented, the temperature of the ship structure is prevented from dropping to an unsafe degree, and the LNT A-BOX enclosure system can transport the LNG liquid cargo with the cargo temperature as low as-163 ℃. To address the laying and support of the secondary barrier in an LNT a-BOX containment system, the hull structure needs to provide a component-free interior surface. Meanwhile, according to the requirements of IGC rules, when the temperature of transported goods is lower than-55 ℃, the cross section of the ship body needs to be arranged to be a double-layer bottom and a double-side, so that for the liquefaction ship adopting an LNT A-BOX containment system to transport goods with the temperature lower than-55 ℃, the cross section of the ship body is generally arranged to be of a double-layer bottom structure, a double-side structure and a double-deck structure, wherein the height of the double-deck is about 1.2 m-1.4 m.

The hull structure of the existing LNT A-BOX type liquefied gas carrier has at least the following problems: the cabin capacity is smaller; the whole weight of the ship body is heavy; the top in the cabin is lower, the laying of the secondary screen wall and the construction process of the supporting structure are difficult, the period is long, the cost is high, the maintenance difficulty in the cabin is large and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a liquefied natural gas transport ship and a liquefied natural gas transport system, which can relieve the problem that the hull structure of the LNT A-BOX type liquefied gas ship in the prior art has smaller cabin capacity; the whole weight of the ship body is heavy; the top in the cabin is lower, the laying of the secondary screen wall and the construction process of the supporting structure have great difficulty, the period is long, the cost is high, and the maintenance difficulty in the cabin is great.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, an embodiment of the present invention provides a lng carrier, where a hull of the lng carrier includes a double-deck bottom plate, a double-side plate, and a single-deck main deck;

the double-layer bottom plate comprises a bottom outer plate, a bottom inner plate and a bottom rib plate connected between the bottom outer plate and the bottom inner plate; the double-side plate comprises a side outer plate, a side inner plate and a side reinforcing frame plate connected between the side outer plate and the side inner plate; the single-layer main deck comprises a deck body and a deck reinforcing structure;

the inner bottom plate, the inner side plate and the deck body are surrounded to form a liquid tank cabin, and the deck reinforcing structure is arranged on the outer side face of the deck body.

In an alternative embodiment, the deck reinforcement structure is welded to the outer side of the deck body.

In an optional embodiment, the deck reinforcing structure comprises deck cross beams, deck stringers and deck longitudinals, wherein the deck cross beams, the deck stringers and the deck longitudinals respectively comprise a plurality of cross beams, the deck cross beams are arranged pairwise at intervals, the deck stringers are arranged pairwise at intervals, and the deck longitudinals are arranged pairwise at intervals;

the deck longitudinal girders and the deck transverse girders are mutually crossed and mutually supported, and the deck longitudinal girders are supported on the deck transverse girders.

In an alternative embodiment, the broadside reinforcement deckle is aligned up and down with a deck beam adjacent to the broadside reinforcement deckle.

In an alternative embodiment, the bottom fin is aligned up and down with the deck transom adjacent the bottom fin.

In an optional embodiment, the lng carrier further includes an insulating secondary barrier, and the insulating secondary barrier is laid on the inner side surface of the bottom inner plate, the inner side surface of the side inner plate, and the inner side surface of the deck body.

In an alternative embodiment, a liquefied natural gas tank is mounted inside the tank compartment.

In an alternative embodiment, a liquid tank top shaking stopping structure, a liquid tank top floating stopping structure and a liquid tank bottom independent supporting structure are arranged on the outer surface of the liquefied natural gas tank.

In an optional embodiment, the deck reinforcing structure includes deck beams and deck stringers, the deck beams and the deck stringers include a plurality of beams, the deck beams are disposed at intervals, the deck stringers are disposed at intervals, and the deck stringers and the deck beams adjacent to each other are crossed and supported to each other;

the tank top anti-sway structure is vertically aligned with a deck cross beam adjacent to the tank top anti-sway structure, or the tank top anti-sway structure is vertically aligned with a deck stringer adjacent to the tank top anti-sway structure;

and the liquid tank top floating stopping structure is vertically aligned with a deck crossbeam adjacent to the liquid tank top floating stopping structure, or the liquid tank top floating stopping structure is vertically aligned with a deck stringer adjacent to the liquid tank top floating stopping structure.

In a second aspect, an embodiment of the present invention provides an lng transportation system, including any one of the lng transportation vessels of the foregoing embodiments.

The embodiment of the utility model provides a can realize following beneficial effect:

in a first aspect, an embodiment of the present invention provides a lng carrier, a hull of which includes a double-deck bottom plate, a double-side plate, and a single-deck main deck; the double-layer bottom plate comprises a bottom outer plate, a bottom inner plate and a bottom rib plate connected between the bottom outer plate and the bottom inner plate; the double-side plate comprises a side outer plate, a side inner plate and a side reinforcing frame plate connected between the side outer plate and the side inner plate; the single-layer main deck comprises a deck body and a deck reinforcing structure; the liquid tank cabin is formed by surrounding among the inner bottom plate, the inner side plate and the deck body, and the deck reinforcing structure is arranged on the outer side face of the deck body.

In the embodiment of the utility model, the applicant sets double-layer shell structures at the bottom and the side of the LNT A-BOX liquid tank region according to IGC requirements, namely the structure of the double-layer bottom plate and the double-side plate, and simultaneously does not have the double-layer shell requirements on the top position of the liquid tank cabin according to IGC rules, creatively, a single-layer main deck is arranged at the top position of the liquid tank cabin, and simultaneously, in order to meet the requirements of laying and supporting an insulation system of the LNT A-BOX, deck reinforcing structures on the single-layer main deck are all arranged on the outer side surface of the deck body, thereby not only meeting the requirements of the insulation system of the LNT A-BOX on the inner side surface of the liquid tank cabin, but also increasing the cabin capacity of the liquid tank cabin to the maximum extent, realizing the purpose of maximizing the capacity of the LNT A-BOX, realizing the maximum cargo capacity under the same ship main scale, and lightening the structural weight of the ship body, thereby improving the economic index and the competitive power of the ship; meanwhile, the deck structure is turned outwards, so that the construction of a shipyard and the future structure inspection are very convenient, the construction cost and time of the shipyard are saved, and the ship construction and operation cost is effectively reduced.

In summary, the embodiment of the utility model at least relieves the problem that the hull structure of the LNT A-BOX type liquefied gas carrier in the prior art has smaller cabin capacity; the whole weight of the ship body is heavy; the top in the cabin is lower, the laying of the secondary screen wall and the construction process of the supporting structure have great difficulty, the period is long, the cost is high, and the maintenance difficulty in the cabin is great.

A second aspect of the embodiments of the present invention further provides a lng transportation system, including the lng carrier provided in the first aspect; because the embodiment of the utility model provides a liquefied natural gas transportation system includes the liquefied natural gas transport ship that the first aspect provided, therefore, the embodiment of the utility model provides a liquefied natural gas transportation system can reach all beneficial effects that the liquefied natural gas transport ship that the first aspect provided can reach.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a plan view of a deck of a liquefied natural gas transport ship according to an embodiment of the present invention;

fig. 2 is a structural diagram of a hull reinforcing frame of an lng carrier according to an embodiment of the present invention;

fig. 3 is a weak frame structure diagram of the hull of the lng carrier provided by the embodiment of the present invention.

Icon: 11-a bottom shell plate; 12-inner bottom plate; 13-a bottom rib plate; 21-a side shell; 22-side inner plate; 23-broadside reinforcement deckle boards; 31-a deck body; 32-deck beams; 33-deck stringers; 34-longitudinal deck bone; 4-insulating secondary screen wall; 5-liquefied natural gas tank; 61-a shaking stopping structure at the top of the liquid tank; 62-a floating stopping structure at the top of the liquid tank; 63-independent support structure for the bottom of the tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "longitudinal", "inner", "outer", "strong", "weak", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "transverse", "longitudinal", and the like do not imply a requirement for absolute perpendicularity between the transverse and longitudinal components, but may be somewhat oblique.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example one

The present embodiment provides an lng carrier, and referring to fig. 1 to 3, a hull of the lng carrier includes a double-deck bottom plate, double-deck side plates, and a single-deck main deck. Wherein the strong and weak frames in fig. 2 and 3 refer to the relatively strong and weak frame structures in terms of structural strength.

Specifically, the double-layer bottom plate comprises a bottom outer plate 11, a bottom inner plate 12 and a bottom rib plate 13 connected between the bottom outer plate 11 and the bottom inner plate 12; the double side plate comprises a side outer plate 21, a side inner plate 22 and a side reinforcing frame plate 23 connected between the side outer plate 21 and the side inner plate 22; the single-layer main deck comprises a deck body 31 and a deck reinforcing structure; the tank is enclosed between the inner bottom plate 12, the inner side plate 22, and the deck body 31, and the deck reinforcing structure is provided on the outer side surface of the deck body 31.

In the embodiment, the applicant requires that a double-layer shell structure is arranged at the bottom and the side of the LNT A-BOX tank area according to the IGC, namely the structure of the double-layer bottom plate and the double-side plate, and simultaneously, the requirement of double-layer shells on the top of the tank cabin is not met according to the IGC rule, creatively, a single-layer main deck is arranged at the top of the liquid tank cabin, and simultaneously, in order to meet the requirements of laying and supporting an insulation system of the LNT A-BOX, deck reinforcing structures on the single-layer main deck are all arranged on the outer side surface of a deck body 31, thereby not only meeting the requirement of the LNT A-BOX insulation system on the smooth surface of the inner side of the liquid tank compartment, but also can increase the chamber capacity of the liquid tank chamber to the maximum extent, realize the purpose of maximizing the LNT A-BOX chamber capacity, the maximum cargo capacity is realized under the same main dimension of the ship, the structural weight of the ship body is reduced, and the economic index and the competitive capacity of the ship are improved; meanwhile, the deck structure is turned outwards, so that the construction of a shipyard and the future structure inspection are very convenient, the construction cost and time of the shipyard are saved, and the ship construction and operation cost is effectively reduced.

In conclusion, the embodiment at least relieves the problem that the hull structure of the LNT A-BOX type liquefied gas carrier in the prior art has smaller cabin capacity; the whole weight of the ship body is heavy; the top in the cabin is lower, the laying of the secondary screen wall and the construction process of the supporting structure have great difficulty, the period is long, the cost is high, and the maintenance difficulty in the cabin is great.

In this embodiment, the specific connection form of the deck reinforcing structure to the deck body 31 has various forms, such as, but not limited to, welding the deck reinforcing structure to the outer side of the deck body 31.

With continued reference to fig. 1-3, in the present embodiment, the deck reinforcing structure includes a plurality of deck beams 32, deck stringers 33, and deck longitudinals 34, the deck beams 32, the deck stringers 33, and the deck longitudinals 34 respectively include a plurality of deck beams 32, the plurality of deck beams 32 are disposed at intervals, the plurality of deck stringers 33 are disposed at intervals, and the plurality of deck longitudinals 34 are disposed at intervals; adjacent deck stringers 33 and deck beams 32 cross and support each other, and deck stringers 34 support deck beams 32.

To improve the strength and rigidity of the hull structure, in the present embodiment, it is preferable that the broadside reinforcing frame plate 23 be aligned up and down with the deck beams 32 adjacent to the broadside reinforcing frame plate 23; also preferably, the bottom cross brace 13 is aligned above and below the deck beam 32 adjacent the bottom cross brace 13.

In this embodiment, the lng carrier further includes an insulating secondary barrier 4, and the insulating secondary barrier 4 is laid on the inner side of the bottom inner plate 12, the inner side of the side inner plate 22, and the inner side of the deck body 31; therefore, liquid cargo can reach the secondary screen wall without directly contacting with the hull structure after the main screen wall leaks, so that the low-temperature influence on the hull structure is effectively prevented, and the temperature of the hull structure is prevented from being reduced to an unsafe degree; preferably, the inner side of the inner bottom board 12, the inner side of the side board 22 and the inner side of the deck body 31 are formed as smooth surfaces.

Referring to fig. 1 to 3, a liquefied natural gas tank 5 is installed inside the tank deck; in order to limit the rigid motion of the independent liquefied natural gas tank 5 in the ship cabin and ensure that the load caused by the liquefied natural gas tank 5 is effectively transmitted to the ship structure, a tank top anti-swing structure 61, a tank top anti-floating structure 62 and a tank bottom independent supporting structure 63 are arranged on the outer surface of the liquefied natural gas tank 5.

In order to increase the structural strength, preferably, the deck reinforcing structure comprises a plurality of deck beams 32 and deck stringers 33, the deck beams 32 and the deck stringers 33 respectively comprise a plurality of deck beams 32 arranged at intervals two by two, the deck beams 33 are arranged at intervals two by two, and the adjacent deck beams 33 and deck beams 32 are crossed and supported with each other, further, the tank top anti-sway structure 61 is aligned up and down with the deck beams 32 adjacent to the tank top anti-sway structure 61, or the tank top anti-sway structure 61 is aligned up and down with the deck stringers 33 adjacent to the tank top anti-sway structure 61; and the tank top float stop 62 is aligned up and down with the deck beams 32 adjacent the tank top float stop 62, or alternatively, the tank top float stop 62 is aligned up and down with the deck stringers 33 adjacent the tank top float stop 62.

Example two

The embodiment provides an lng transportation system including the lng transportation vessel according to any one of the optional embodiments of the embodiment.

Since the lng transportation system provided in this embodiment includes the lng transportation vessel described in the first embodiment, the lng transportation system provided in this embodiment can achieve all the advantages that can be achieved by the lng transportation vessel in the first embodiment, and the specific structure and the achievable effects thereof can be obtained with reference to each optional or preferred embodiment in the first embodiment.

Finally, it should be noted that: the embodiments in the present description are all described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The liquefied natural gas transport ship is characterized in that a ship body of the liquefied natural gas transport ship comprises a double-layer bottom plate, double side plates and a single-layer main deck;

the double-layer bottom plate comprises a bottom outer plate (11), a bottom inner plate (12) and a bottom rib plate (13) connected between the bottom outer plate (11) and the bottom inner plate (12); the double-side plate comprises a side outer plate (21), a side inner plate (22) and a side reinforcing frame plate (23) connected between the side outer plate (21) and the side inner plate (22); the single-layer main deck comprises a deck body (31) and a deck reinforcing structure;

the liquid tank is formed by surrounding the inner bottom plate (12), the inner side plate (22) and the deck body (31), and the deck reinforcing structure is arranged on the outer side face of the deck body (31).

2. Liquefied natural gas transport vessel according to claim 1, wherein the deck reinforcing structure is welded to an outer side face of the deck body (31).

3. The lng carrier vessel according to claim 1, wherein the deck reinforcing structure includes deck beams (32), deck stringers (33), and deck stringers (34), the deck beams (32), the deck stringers (33), and the deck stringers (34) respectively include a plurality of the deck beams (32), the deck stringers (33), and the deck stringers (34), the plurality of deck beams (32) are disposed at intervals two by two, the plurality of deck stringers (33) are disposed at intervals two by two, and the plurality of deck stringers (34) are disposed at intervals two by two;

the adjacent deck stringers (33) and deck beams (32) cross and support each other, and the deck longitudinals (34) are supported by the deck beams (32).

4. The liquefied natural gas transport vessel according to claim 3,

the broadside reinforcement deckle plate (23) is aligned above and below a deck beam (32) adjacent to the broadside reinforcement deckle plate (23).

5. Liquefied natural gas transport vessel according to claim 3 or 4, wherein the bottom fin (13) is aligned above and below a deck beam (32) adjacent to the bottom fin (13).

6. The lng carrier of claim 1, further comprising an insulating secondary barrier (4), the insulating secondary barrier (4) being laid on an inner side of the bilge inner plate (12), an inner side of the side inner plate (22) and an inner side of the deck body (31).

7. The lng carrier vessel according to claim 6, characterized in that an lng tank (5) is installed inside the tank deck.

8. The lng carrier vessel according to claim 7, wherein a tank top anti-sway structure (61), a tank top anti-float structure (62) and a tank bottom independent support structure (63) are provided on the outer surface of the lng tank (5).

9. The lng carrier vessel according to claim 8, wherein the deck reinforcing structure includes deck beams (32) and deck stringers (33), the deck beams (32) and the deck stringers (33) respectively include a plurality of deck beams (32), the deck beams (32) are arranged at intervals, the deck stringers (33) are arranged at intervals, and the deck beams (33) and the deck beams (32) adjacent to each other cross and support each other;

the tank top anti-sway structure (61) is aligned up and down with a deck cross beam (32) adjacent the tank top anti-sway structure (61), or the tank top anti-sway structure (61) is aligned up and down with a deck stringer (33) adjacent the tank top anti-sway structure (61);

and the tank top float stop structure (62) is aligned above and below a deck beam (32) adjacent the tank top float stop structure (62), or the tank top float stop structure (62) is aligned above and below a deck stringer (33) adjacent the tank top float stop structure (62).

10. A lng transportation system comprising the lng transportation vessel of any one of claims 1 to 9.

Images