WO2023199859A1

WO2023199859A1 - Marine vessel

Info

Publication number: WO2023199859A1
Application number: PCT/JP2023/014380
Authority: WO
Inventors: 英哉橋口; 恒一奥田
Original assignee: 三菱造船株式会社
Priority date: 2022-04-15
Filing date: 2023-04-07
Publication date: 2023-10-19
Also published as: JP2023157594A

Abstract

A marine vessel provided with: a hull that has a pair of vessel sides and an upper deck; a superstructure that extends further upward from the upper deck and has an accommodation section; fuel tanks that are provided on the vessel side sides with respect to the superstructure on the upper deck; and a bulkhead provided between the fuel tanks and the superstructure.

Description

ship

TECHNICAL FIELD This disclosure relates to ships.
This application claims priority to Japanese Patent Application No. 2022-067596 filed in Japan on April 15, 2022, and the contents thereof are incorporated herein.

Patent Document 1 discloses a ship configured to include a fuel tank on the upper deck of the stern portion of the hull. The fuel tank of Patent Document 1 contains liquefied gas that serves as fuel for the main engine, etc. that exerts the propulsive force for navigating the ship, and is arranged on the upper deck on the stern side of the upper structure having a living area. ing.

Japanese Patent No. 6966661

By the way, when the liquefied gas contained in the fuel tank is, for example, ammonia or the like, at least the side of the upper structure facing the fuel tank needs to have a structure that satisfies predetermined fire protection equipment requirements. However, it is costly to create a structure that satisfies the fire prevention equipment requirements, and it may be difficult to create a structure that satisfies the fire prevention equipment requirements.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a ship that can suppress an increase in cost by ensuring fireproof performance on the side of the upper structure facing the fuel tank.

In order to solve the above problems, a ship according to the present disclosure includes a hull, a superstructure, a fuel tank, and a bulkhead. The hull has a pair of sides and an upper deck. The superstructure extends further upward from the upper deck and has a living area. The fuel tank is arranged on at least one of the shipside sides of the upper structure on the upper deck. The partition wall is provided between the fuel tank and the upper structure.

According to the ship of the present disclosure, it is possible to suppress an increase in cost due to ensuring fireproof performance on the side of the upper structure facing the fuel tank.

FIG. 1 is a side view of a ship according to an embodiment of the present disclosure. FIG. 2 is a plan view of the stern side of the ship according to the embodiment of the present disclosure. FIG. 1 is a diagram of a ship according to an embodiment of the present disclosure viewed from the stern side.

A ship according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 3.
(Overall configuration of the ship)
As shown in FIGS. 1 to 3, the ship 1 of this embodiment mainly includes a hull 2, an upper structure 7,

fuel tanks

10A, 10B, and

bulkheads

20A, 20B. The type of ship 1 is not limited to a specific type. Examples of the type of ship 1 include a ship carrying liquefied gases such as liquefied natural gas (LNG), carbon dioxide, and ammonia.

The hull 2 has a pair of

sides

3A and 3B, a bottom 4, and an upper deck 5, which form the outer shell. The

sides

3A and 3B have a pair of side skins forming port and starboard sides, respectively. The bottom 4 has a bottom shell plate that connects these

sides

3A and 3B. Due to these pair of

sides

3A, 3B and the bottom 4, the outer shell of the hull 2 forms a U-shape in a cross section perpendicular to the bow and stern direction FA, which is the direction connecting the bow 2a and stern 2b of the hull 2. There is. The hull 2 includes multiple deck layers including an upper deck 5 and a bottom deck 6. The upper deck 5 is a full deck located at the top layer. The upper deck 5 is exposed to the outside.

The superstructure 7 is formed on the upper deck 5 of the hull 2 on the side closer to the stern 2b. The superstructure 7 has a living area. In this embodiment, the case where the upper structure 7 has an upper structure main body part 71 and a wing part 72 is illustrated. The upper structure main body portion 71 has a rectangular shape in plan view, with its long side extending in the bow and aft direction FA, and its short side extending in the ship width direction Dw connecting the pair of

sides

3A and 3B. The wing portion 72 protrudes from a bridge (not shown) provided at the upper part of the upper structure main body portion 71 to both sides in the ship width direction Dw. The upper structure body 71 and the wing portions 72 form the upper structure 7 in a T-shape when viewed from the bow and aft direction FA.

An engine casing 30 is arranged on the stern 2b side of the upper structure 7 in the bow-stern direction FA. The engine casing 30 discharges exhaust gas etc. discharged from the prime mover 15, which will be described later.

As shown in FIG. 1, a plurality of sections S are formed within the hull 2. The plurality of sections S are arranged in the bow and aft direction FA within the hull 2. A plurality of partition walls 11 are formed within the hull 2 at intervals in the bow and aft direction FA. Between the pair of

sides

3A and 3B, the space between the bottom deck 6 and the upper deck 5 is partitioned in the bow and aft direction FA by a plurality of partition walls 11. A plurality of sections S are formed by partitioning the interior of the hull 2 in the bow and aft direction FA by a plurality of partition walls 11. In this embodiment, as the plurality of sections S, seven sections S1 to S7 are arranged in the bow and aft direction FA.

Of the plurality of sections S1 to S7, the section S1 located closest to the stern 2b in the bow-stern direction FA is an engine room. A prime mover 15 is arranged within a compartment S1 serving as an engine room. The prime mover 15 uses liquefied gas supplied from the

fuel tanks

10A and 10B as fuel. In this embodiment, the prime mover 15 is, for example, a main engine and an auxiliary engine. The prime mover 15 as the main engine exerts a propulsive force that causes the ship 1 to sail. A prime mover 15 serving as a main engine rotationally drives a screw 8 provided outside the stern 2b of the hull 2. The prime mover 15 as an auxiliary machine generates power used within the ship 1. In this embodiment, the prime mover 15 as an auxiliary machine is, for example, a generator engine for driving a generator (not shown). As the prime mover 15, for example, a steam turbine, a gas turbine, a reciprocating engine, etc. can be used. Note that when the prime mover 15 is a steam turbine, high-temperature, high-pressure steam is generated in a boiler using liquefied gas as fuel, and the velocity energy of this steam is converted into motive energy.

Among the plurality of compartments S1 to S7, the other compartments S2 to S6, excluding the compartment S1 serving as the engine room and the compartment S7 closest to the bow 2a, are so-called cargo compartments that accommodate cargo to be transported by the ship 1. has been done. In this embodiment, the cargo compartments S2 to S6 store liquefied gas as cargo.

As shown in FIGS. 1 to 3, the

fuel tanks

10A and 10B are provided at the rear of the hull 2.

Fuel tanks

10A and 10B are provided on the upper deck 5. The

fuel tanks

10A and 10B are arranged at positions overlapping the upper structure 7 in the bow and aft direction FA. The

fuel tanks

10A and 10B are arranged on both sides of the upper structure 7 in the ship width direction Dw. The fuel tank 10A is arranged on the upper deck 5 on one side 3A of the upper structure 7 in the ship width direction Dw. The fuel tank 10B is arranged on the upper deck 5 on the other side 3B side with respect to the upper structure 7 in the ship width direction Dw. In this embodiment, the fuel tank 10A disposed on one side in the transverse direction Dw and the fuel tank 10B disposed on the other side in the transverse direction Dw are arranged with the center of the hull 2 in the transverse direction Dw sandwiched between them. arranged symmetrically.

The

fuel tanks

10A and 10B each have a tank body 12, a pedestal 13, and a tank connection part 14.
The tank body 12 stores liquefied gas, such as ammonia, which serves as fuel for the prime mover 15. The tank body 12 is a cylindrical container whose longitudinal direction is the bow and aft direction FA. The tank body 12 has a tank intermediate portion 12m, a first end plate portion 12a, and a second end plate portion 12b. The tank intermediate portion 12m has a constant diameter and extends in a cylindrical shape in the bow and aft direction FA. The first mirror plate portion 12a closes the bow 2a side of the tank intermediate portion 12m in the bow and tail direction FA. The first mirror plate portion 12a is formed in a hemispherical shape whose outer diameter gradually decreases from the stern 2b side toward the bow 2a side in the bow-stern direction FA. The second mirror plate portion 12b closes the stern 2b of the tank intermediate portion 12m in the bow-stern direction FA. The second mirror plate portion 12b is formed into a hemispherical shape whose outer diameter gradually decreases from the bow 2a side to the stern 2b side in the bow-stern direction FA.

A plurality of frames 13 are provided on the upper deck 5 at intervals in the bow and aft direction FA. The plurality of frames 13 support the tank body 12 from below. The mount 13 projects toward the center of the tank body 12 in the ship width direction Dw when viewed from the bow and aft direction FA.

The tank connection part 14 is provided on the tank body 12. In other words, the tank connection portion 14 forms the uppermost portion of the

fuel tanks

10A, 10B. The tank connection portion 14 accommodates, for example, a connection valve used when introducing fuel into the tank body 12 from the outside, various meters, and the like. The height of the

fuel tanks

10A, 10B in this embodiment is lower than the height of the upper structure 7. Note that a staircase (not shown) may be provided between the

fuel tanks

10A, 10B and the upper floor of the superstructure 7 in order for workers to access the tank connection part 14 from the superstructure 7. .

As shown in FIGS. 2 and 3, the

bulkheads

20A and 20B are arranged on both sides of the upper structure 7 in the ship width direction Dw. Specifically, the bulkhead 20A is disposed on one side (in other words, the port side) of the superstructure 7 in the transverse direction Dw, and the bulkhead 20B is disposed on one side of the superstructure 7 in the transverse direction Dw. It is located on the other side (in other words, on the starboard side). The height of the

partition walls

20A, 20B is preferably greater than or equal to the height of the

fuel tanks

10A, 10B.

The bulkhead 20A is provided between the fuel tank 10A and the upper structure 7 in the ship width direction Dw. The bulkhead 20A is disposed on the center side in the transverse direction Dw with respect to the fuel tank 10A disposed on one side in the transverse direction Dw. The bulkhead 20A illustrated in this embodiment is located between the fuel tank 10A disposed on one side in the ship width direction Dw and the upper structure 7, and is located closer to the fuel tank 10A than the upper structure 7 in the ship width direction Dw. It is located in

The partition wall 20A is formed to cover the surface of the fuel tank 10A that faces the upper structure 7 side in the ship width direction Dw (the side facing the upper structure 7). The bulkhead 20A has the same dimensions as the fuel tank 10A or larger dimensions in both the bow and aft direction FA and the vertical direction Dv so as to overlap the entire fuel tank 10A when viewed from the ship width direction Dw. ing. In other words, the partition wall 20A is arranged to cover the upper structure 7 when viewed from the fuel tank 10A side. A passage 41A is formed between the bulkhead 20A and the upper structure 7 and extends in the bow and aft direction FA.

As shown in FIG. 3, the partition 20A is made of steel, for example, and includes a first partition 21A and a second partition 22A. The first partition wall portion 21A extends upward from the upper deck 5. The first partition wall portion 21A is connected to the pedestal 13 and extends upward to a position above the bottom of the tank body 12 of the fuel tank 10A and below the top of the tank body 12 of the fuel tank 10A. Although the first bulkhead portion 21A extends in a direction perpendicular to the upper surface of the upper deck 5, the first bulkhead portion 21A only needs to extend upward from the upper deck 5. It's not something you can do.

The second bulkhead portion 22A extends from the upper edge of the first bulkhead portion 21A toward the outside in the ship width direction Dw. The second bulkhead portion 22A illustrated in this embodiment is inclined so that it is disposed upward toward the outer side in the ship width direction Dw. An outer edge of the second bulkhead portion 22A in the ship width direction Dw is connected to a tank connection portion 14 located on the tank body 12 of the fuel tank 10A. That is, in this embodiment, the upper edge of the partition wall 20A is connected to the top of the fuel tank 10A. In the fuel tank 10A, the side facing the upper structure 7 (the central part side in the ship width direction Dw) and the opposite side (the side 3A side which is the outside in the ship width direction Dw) are open without being covered with the bulkhead 20A. There is. Note that the partition wall 20A may be connected to the outer peripheral surface of the tank body 12 of the fuel tank 10A via a connecting member (not shown).

The bulkhead 20B is provided symmetrically with the above-mentioned bulkhead 20A in the ship width direction Dw, and is provided between the fuel tank 10B arranged on the other side in the ship width direction Dw and the upper structure 7. That is, the bulkhead 20B is arranged on the center side in the ship width direction Dw with respect to the fuel tank 10B. The partition wall 20B illustrated in this embodiment is arranged between the fuel tank 10B and the upper structure 7 on a side closer to the fuel tank 10B than the upper structure 7 in the ship width direction Dw.

The bulkhead 20B is formed to cover the surface of the fuel tank 10B that faces the upper structure 7 side in the ship width direction Dw (the side facing the upper structure 7). The bulkhead 20B has the same size as the fuel tank 10B or a size larger than the fuel tank 10B in both the bow and aft direction FA and the vertical direction Dv so as to overlap the entire fuel tank 10B when viewed from the ship width direction Dw. are doing. In other words, the partition wall 20B is arranged to cover the upper structure 7 when viewed from the fuel tank 10B side. A passage 41B is formed between the bulkhead 20B and the upper structure 7 and extends in the bow and aft direction FA.

The partition wall 20B is made of steel, for example, and has a first partition wall portion 21B and a second partition wall portion 22B like the partition wall 20A described above. The first partition wall 21B extends upward from the upper deck 5, similarly to the first partition wall 21A. The first partition wall portion 21B is integrally connected to the pedestal 13 and extends upward to a position above the bottom of the tank body 12 of the fuel tank 10B and below the top of the tank body 12 of the fuel tank 10B. Although the first bulkhead portion 21B extends in a direction perpendicular to the upper surface of the upper deck 5, the first bulkhead portion 21B only needs to extend upward from the upper deck 5. It's not something you can do.

The second bulkhead portion 22B is provided symmetrically with the second bulkhead portion 22A described above in the ship width direction Dw, and extends from the upper edge of the first bulkhead portion 21B toward the outside in the ship width direction Dw. The second bulkhead portion 22B illustrated in this embodiment is inclined so that it is disposed upward toward the outer side in the ship width direction Dw. An outer edge of the second bulkhead portion 22B in the ship width direction Dw is connected to a tank connection portion 14 located on the tank body 12 of the fuel tank 10B. That is, in this embodiment, the upper edge of the partition wall 20B is connected to the top of the fuel tank 10B. In the fuel tank 10B, the side facing the upper structure 7 (the center side in the ship width direction Dw) and the opposite side (the side 3B, which is the outside in the ship width direction Dw) are open without being covered with the bulkhead 20A. There is. Note that the partition wall 20B may be connected to the outer peripheral surface of the tank body 12 of the fuel tank 10B via a connecting member (not shown).

An escape boat 40 is installed on the upper deck 5 on the stern 2b side of the superstructure 7.
Further, a vent post 35 is installed on the upper deck 5 closer to the stern 2b than the upper structure 7. The vent post 35 is capable of discharging vent gas and the like from the cargo tanks mounted in the cargo compartments S2 to S6 into the atmosphere. In this embodiment, the vent post 35 is, for example, spaced apart from the upper structure 7 and the

fuel tanks

10A, 10B toward the stern 2b side.

(effect)
In the ship 1 of the embodiment described above, the

fuel tanks

10A and 10B are arranged on the

side

3A and 3B of the upper structure 7. Thereby, the limited space on the upper deck 5 can be effectively utilized to arrange the

fuel tanks

10A and 10B. In such a configuration,

partition walls

20A, 20B are provided between the

fuel tanks

10A, 10B and the upper structure 7. Even if the fuel stored in the

fuel tanks

10A, 10B leaks, the

partition walls

20A, 20B can effectively prevent the fuel from reaching the upper structure 7. Further, the

partition walls

20A and 20B can also be used as fireproof sections for the upper structure 7. Therefore, by providing the

bulkheads

20A, 20B, it is possible to narrow the distance between the

fuel tanks

10A, 10B and the upper structure 7 in the ship width direction Dw connecting the pair of

sides

3A, 3B, and also It is possible to suppress an increase in cost due to ensuring fireproof performance on the side facing the

fuel tanks

10A, 10B.

Furthermore, in the embodiment described above, the

fuel tanks

10A and 10B are arranged on the side of the pair of sides 3A and the side of the other side 3B with respect to the upper structure 7. Thereby, the capacity of the

fuel tanks

10A and 10B can be increased while effectively utilizing the space on the upper deck 5.

Furthermore, in the embodiment described above, the

partition walls

20A and 20B are formed to cover the side facing the upper structure 7 in the

fuel tanks

10A and 10B. Thereby, even if the fuel stored in the

fuel tanks

10A, 10B leaks, it is possible to more effectively prevent the fuel from reaching the upper structure 7. Further, the outer side of the

fuel tanks

10A, 10B in the ship width direction Dw, which is the side opposite to the side facing the upper structure 7, is not covered with the

bulkheads

20A, 20B and is open. Thereby, the fuel leaking from the

fuel tanks

10A, 10B can be dissipated outward in the ship width direction Dw, and the influence on the upper structure 7 can be suppressed.

Furthermore, in the above embodiment, the

second partition walls

22A, 22B extending upward from the upper ends of the

first partition walls

21A, 21B are inclined toward the

fuel tanks

10A, 10B. Thereby, the side facing the upper structure 7 of the

fuel tanks

10A, 10B can be covered by the

partition walls

20A, 20B while suppressing the height of the

partition walls

20A, 20B.

Furthermore, in the above embodiment, the

partition walls

20A, 20B are connected to the mounts 13 of the

fuel tanks

10A, 10B. Thereby, the

partition walls

20A, 20B can be firmly installed.

Furthermore, in the embodiment described above, the upper edges of the

partition walls

20A, 20B are connected to the tank connection portion 14, which is a part of the

fuel tanks

10A, 10B. Thereby, the

partition walls

20A, 20B can be firmly installed.

Further, in the embodiment described above,

passages

41A and 41B are formed between the

partition walls

20A and 20B and the upper structure 7. Since the fuel tank 10A side with respect to the passage 41A is covered with the partition wall 20A, and the fuel tank 10B side with respect to the passage 41B is covered with the partition wall 20B, the safety of the

passages

41A and 41B can be ensured. Therefore, each of the

passages

41A and 41B can be used as an evacuation passage.

(Other embodiments)
Although the embodiment of the present disclosure has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes within the scope of the gist of the present disclosure. .
In the above embodiment, the

fuel tanks

10A and 10B are provided on both sides of the upper structure 7 in the ship width direction Dw, but the present invention is not limited to this. The fuel tank may be disposed on at least one

side

3A, 3B of the upper structure 7.
Further, a plurality of

fuel tanks

10A and 10B may be arranged side by side in the bow and aft direction FA between the upper structure 7 and the

sides

3A and 3B. In this case, the

bulkheads

20A and 20B may be provided so as to integrally cover the plurality of

fuel tanks

10A and 10B lined up in the bow and aft direction FA, or may be provided so as to cover each of the plurality of

fuel tanks

10A and 10B lined up in the bow and aft direction FA. They may be provided individually.

<Additional notes>
The ship 1 described in the embodiment is understood as follows, for example.

(1) A ship 1 according to a first aspect includes a hull 2 having a pair of

sides

3A, 3B and an upper deck 5, and an upper structure 7 extending further upward from the upper deck 5 and having a living area. ,

fuel tanks

10A, 10B disposed on at least one

side

3A, 3B of the upper deck 5 with respect to the upper structure 7; and

fuel tanks

10A, 10B provided between the

fuel tanks

10A, 10B and the upper structure 7.

partition walls

20A and 20B.

Thereby, the limited space on the upper deck 5 can be effectively utilized to arrange the

fuel tanks

10A and 10B. In such a configuration,

partition walls

20A, 20B are provided between the

fuel tanks

10A, 10B and the upper structure 7. Even if the fuel stored in the

fuel tanks

10A, 10B leaks, the

partition walls

bulkheads

20A, 20B, it is possible to narrow the distance between the

fuel tanks

sides

fuel tanks

10A, 10B.

(2) A ship 1 according to a second aspect is the ship 1 according to (1), in which the

fuel tanks

10A and 10B are located on one side of the side 3A and on the other side of the upper structure 7. They are respectively arranged on the gunwale side 3B side.

Thereby, the capacity of the

fuel tanks

(3) The ship 1 according to the third aspect is the ship 1 according to (1) or (2), in which the

bulkheads

20A, 20B extend from the side facing the upper structure 7 in the

fuel tanks

10A, 10B. It is formed to cover.

Thereby, even if the fuel stored in the

fuel tanks

10A, 10B leaks, it is possible to more effectively prevent the fuel from reaching the upper structure 7.

(4) The ship 1 according to the fourth aspect is the ship 1 of (1) or (2), in which the

bulkheads

20A, 20B are

first bulkhead portions

21A, 21B extending upward from the upper deck 5. , second

partition wall portions

22A, 22B that slope upward from the upper ends of the first

partition wall portions

21A, 21B toward the

fuel tanks

10A, 10B.

Thereby, the side facing the upper structure 7 of the

fuel tanks

10A, 10B can be covered by the

partition walls

20A, 20B while suppressing the height of the

partition walls

20A, 20B.

(5) The ship 1 according to the fifth aspect is the ship 1 according to (1) or (2), in which the

fuel tanks

10A and 10B are provided on the tank body 12 and the upper deck 5, and the

fuel tanks

10A and 10B are provided on the tank body 12 and the upper deck 5, and The tank body 12 is provided with a pedestal 13 that supports the tank body 12 from below, and the

partition walls

20A and 20B are connected to the pedestal 13.

Thereby, the

partition walls

20A and 20B can be firmly installed.

(6) The ship 1 according to the sixth aspect is the ship 1 according to (1) or (2), in which the upper edges of the

bulkheads

20A and 20B are connected to part of the

fuel tanks

10A and 10B. ing.

Thereby, the

partition walls

20A and 20B can be firmly installed.

(7) The ship 1 according to the seventh aspect is the ship 1 according to (1) or (2), in which there is a space between the

bulkheads

20A, 20B and the upper structure 7 in the fore and aft direction FA of the ship body 2.

Passages

41A and 41B are formed that extend into the axial direction.

Thereby, the

fuel tank

10A, 10B side with respect to the

passages

41A, 41B is covered by the

partition walls

20A, 20B, so safety in the

passages

41A, 41B can be ensured. Therefore, these

passages

41A and 41B can be used for evacuation.

1... Vessel 2... Hull 2a... Bow 2b...

Stern

3A, 3B... Side 4... Bottom 5... Upper deck 6... Bottom deck 7... Upper structure 8...

Screw

10A, 10B... Fuel tank 11... Partition wall 12... Tank body 12a ...First end plate part 12b...Second end plate part 12m...Tank intermediate part 13...Base 14...Tank connection part 15...

Motor

20A, 20B...

Partition wall

21A, 21B...

First partition part

22A, 22B...Second partition part 30... Engine casing 35...Vent post 40...

Escape boat

41A, 41B...Passage 71...Superstructure main body part 72...Wing part S, S1-S7...Division

Claims

a hull having a pair of sides and an upper deck;
a superstructure extending further upward from the upper deck and having a living area;
a fuel tank disposed on at least one side of the upper structure on the upper deck;
a partition wall provided between the fuel tank and the upper structure;
A ship equipped with
The ship according to claim 1, wherein the fuel tank is arranged on one side of the upper structure and on the other side of the upper structure.
The ship according to claim 1 or 2, wherein the partition wall is formed to cover a side of the fuel tank that faces the upper structure.
The partition wall is
a first bulkhead extending upward from the upper deck;
The ship according to claim 1 or 2, further comprising: a second partition wall that slopes upward from the upper end of the first partition wall toward the fuel tank.
The fuel tank is
the tank body,
a pedestal provided on the upper deck and supporting the tank body from below;
The ship according to claim 1 or 2, wherein the partition wall is connected to the pedestal.
The ship according to claim 1 or 2, wherein an upper edge of the bulkhead is connected to a part of the fuel tank.
The ship according to claim 1 or 2, wherein a passageway extending in the bow and aft direction of the ship body is formed between the partition wall and the upper structure.