Ships

Abstract

To increase the capacity of a fuel tank efficiently in a limited space on an upper deck.SOLUTION: A ship 1A includes: a hull 2 having an upper deck 5; an upper structure 7 extending upward from the upper deck 5 and having an accommodation space; and fuel tanks 10A, B which are provided at a stern side of the upper structure 7 on the upper deck 5 and extend with a ship height direction set to its longitudinal direction. Further, the ship 1A includes wall bodies 20A, B extending upward from the upper deck 5 and respectively having first wall parts 21A, B which partition the fuel tank 10A, B from the upper structure 7.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to marine vessels. [Background technology]

[0002] Patent Document 1 discloses a vessel having a fuel tank on the upper deck at the stern of the hull. The fuel tank in Patent Document 1 stores liquefied gas that serves as fuel for the main engine, which generates the propulsive force that propels the vessel, and is located on the upper deck aft of the superstructure that contains the accommodation area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6966661 Summary of the Invention [Problem to be solved by the invention]

[0004] Cylindrical fuel tanks are known as fuel tanks for ships such as those described in Patent Document 1. If a fuel tank of this shape is arranged so that its longitudinal direction coincides with the width of the ship, the liquefied gas in the fuel tank will slosh due to the rolling of the ship's hull while sailing, which is known as sloshing. For this reason, fuel tanks are often arranged so that their longitudinal direction coincides with the bow-stern direction, which is the direction connecting the bow and stern of the ship's hull. However, there are cases where an increase in fuel tank capacity is desired, and in such cases, the limited space on the upper deck makes it difficult to efficiently increase fuel tank capacity while suppressing sloshing.

[0005] The present disclosure has been made to solve the above-mentioned problem, and aims to provide a ship that can efficiently increase the capacity of a fuel tank within the limited space on the upper deck. [Means for solving the problem]

[0006] In order to solve the above problems, a ship according to the present disclosure The first aspect of teeth, The vessel comprises a hull having an upper deck, a superstructure extending further upward from the upper deck and having accommodation areas, a fuel tank provided on the upper deck aft of the superstructure and extending with the direction of ship height as its longitudinal direction, a wall extending upward from the upper deck and having a first wall portion that separates the fuel tank and the superstructure, and an escape boat provided on the upper deck aft of the superstructure, the wall portion having a second wall portion that separates the fuel tank and the escape boat. A second aspect of the vessel according to the present disclosure comprises a hull having an upper deck, a superstructure extending further upward from the upper deck and having accommodation areas, a fuel tank provided on the upper deck aft of the superstructure and extending with the ship height direction as its longitudinal direction, and a wall extending upward from the upper deck and having a first wall portion that separates the fuel tank and the superstructure, wherein the upper deck comprises a first upper deck located below the superstructure, and a second upper deck formed on at least a portion of the aft side of the hull and at a position lower than the first upper deck, and the fuel tank and the wall are arranged on the second upper deck. A third aspect of the vessel according to the present disclosure comprises a hull having an upper deck, a superstructure extending further upward from the upper deck and having living quarters, a fuel tank provided on the upper deck aft of the superstructure and extending with the ship height direction as its longitudinal direction, a wall extending upward from the upper deck and having a first wall portion that separates the fuel tank from the superstructure, and a vent post that exhausts gas generated within the hull to the outside, the vent post being positioned aft of the wall. [Effects of the Invention]

[0007] According to the ship of the present disclosure, the capacity of the fuel tank can be efficiently increased in the limited space on the upper deck. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a side view showing a schematic configuration of a marine vessel according to a first embodiment of the present disclosure. FIG. [Figure 2] FIG. 2 is a plan view showing the configuration of the stern side of the marine vessel according to the first preferred embodiment of the present disclosure. [Figure 3] FIG. 1 is a view of a marine vessel according to a first embodiment of the present disclosure, as viewed from the stern side. [Figure 4] FIG. 10 is a side view showing a schematic configuration of a marine vessel according to a second embodiment of the present disclosure. [Figure 5] FIG. 10 is a view of a marine vessel according to a second embodiment of the present disclosure, as viewed from the stern side. [Figure 6] FIG. 10 is a plan view showing a configuration of the stern side of a vessel according to a modified example of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a vessel according to an embodiment of the present disclosure will be described with reference to FIGS. First Embodiment (Overall configuration of the ship) 1 to 3, the ship 1A of this embodiment mainly comprises a hull 2, a superstructure 7, fuel tanks 10A and 10B, and wall bodies 20A and 20B. The type of ship 1A is not limited to a specific one. Examples of the type of ship 1A include bulk carriers, carriers for liquefied gases such as liquefied natural gas (LNG), carbon dioxide, and ammonia, ferries, roll-on / roll-off ships (RORO ships), pure car and truck carriers (PCTCs), and passenger ships.

[0010] The hull 2 ​​has a pair of side walls 3A, 3B, a bottom wall 4, and an upper deck 5 that form its outer hull. The side walls 3A, 3B have a pair of side wall shells that form the port and starboard sides, respectively. The bottom wall 4 has a bottom wall shell that connects the side walls 3A, 3B. The pair of side walls 3A, 3B and the bottom wall 4 give the hull 2 ​​a U-shape in a cross section perpendicular to the bow-stern direction FA. The hull 2 ​​has multiple layers of decks inside, including an upper deck 5 and a bottom deck 6. The upper deck 5 is a full-length deck located on the top layer. The upper deck 5 is exposed to the outside.

[0011] The superstructure 7 is formed on the upper deck 5 on the stern 2b side of the hull 2. The superstructure 7 has an accommodation area. 1 and 2, an engine casing 30 is disposed on the upper deck 5 on the stern 2b side in the fore-aft direction FA relative to the superstructure 7. The engine casing 30 discharges exhaust gases and the like emitted from the prime mover 15, which will be described later.

[0012] As shown in FIG. 1, a plurality of compartments S are formed within the hull 2. The plurality of compartments S are arranged in the fore-aft direction FA within the hull 2. A plurality of compartment walls 11 are formed within the hull 2 ​​at intervals in the fore-aft direction FA. Between a pair of shipsides 3A, 3B, the space between the bottom deck 6 and the upper deck 5 is divided in the fore-aft direction FA by the plurality of compartment walls 11. The interior of the hull 2 ​​is divided in the fore-aft direction FA by the plurality of compartment walls 11, thereby forming a plurality of compartments S. In this embodiment, seven compartments S1 to S7 are arranged in the fore-aft direction FA as the plurality of compartments S.

[0013] Of the multiple compartments S1 to S7, compartment S1, which is located closest to the stern 2b in the bow-stern direction FA, is designated as an engine room. A prime mover 15 is disposed within compartment S1, which serves as the engine room. The prime mover 15 uses liquefied gas supplied from 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, which serves as the main engine, generates propulsive force to propel the ship 1A. The prime mover 15, which serves as the main engine, drives and rotates a screw 8 provided outside the stern 2b of the hull 2. The prime mover 15, which serves as an auxiliary engine, generates power to be used within the ship 1A. In this embodiment, the prime mover 15, which serves as an auxiliary engine, is, for example, a generator engine for driving a generator (not shown). The prime mover 15 may be, for example, a steam turbine, a gas turbine, a reciprocating engine, or the like. 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 power energy.

[0014] Of the multiple compartments S1 to S7, compartments S2 to S6, excluding compartment S1 which serves as an engine room and compartment S7 closest to the bow 2a, are so-called cargo compartments that accommodate cargo to be transported by the ship 1A. In this embodiment, the cargo compartments of compartments S2 to S6 store ore, grain, etc. as cargo.

[0015] As shown in Figures 1 to 3, the fuel tanks 10A, 10B are provided at the rear of the hull 2. The fuel tanks 10A, 10B are provided on the upper deck 5. The fuel tanks 10A, 10B are arranged on the stern 2b side in the fore-aft direction FA relative to the superstructure 7. The fuel tanks 10A, 10B each store a liquefied gas, such as ammonia, that serves as fuel for the prime mover 15, which will be described later. As shown in Figures 2 and 3, in this embodiment, the fuel tanks 10A, 10B are arranged at an interval in the transverse direction Dw. In this embodiment, the fuel tank 10A arranged on one side in the transverse direction Dw and the fuel tank 10B arranged on the other side in the transverse direction Dw are arranged symmetrically in the transverse direction Dw of the hull 2.

[0016] As shown in Figures 1 and 3, fuel tanks 10A, 10B each have a cylindrical shape with a circular cross section that extends in the ship height direction Dv. For fuel tanks 10A, 10B, the dimension H in the longitudinal direction, i.e., the ship height direction Dv, is larger than the diameter D of the circular cross section. Note that, in this embodiment, the central axes of cylindrical fuel tanks 10A, 10B extend in a direction perpendicular to the upper surface of upper deck 5, but the central axes of fuel tanks 10A, 10B are not limited to extending in a direction perpendicular to the upper surface of upper deck 5. For example, the angle formed between the central axes of fuel tanks 10A, 10B and the upper surface of upper deck 5 may be slightly smaller than 90 degrees.

[0017] The fuel tanks 10A, 10B each have a cylindrical tank main body 10m, an upper head portion 10t, and a lower head portion 10b. The upper head portion 10t closes the upper end of the tank main body 10m. The upper head portion 10t has a hemispherical shape with an outer diameter that gradually decreases from bottom to top. The lower head portion 10b closes the lower end of the tank main body 10m. The lower head portion 10b has a hemispherical shape with an outer diameter that gradually decreases from top to bottom. The fuel tanks 10A, 10B are each supported on the upper deck 5 via support members 12. The support members 12 may be multiple leg members (not shown) or a tubular skirt member extending in the ship height direction Dv.

[0018] 1 and 2, wall bodies 20A and 20B are disposed on the stern 2b side in the fore-aft direction FA with respect to the superstructure 7 and the engine casing 30. Wall body 20A is disposed corresponding to fuel tank 10A. Wall body 20B is disposed corresponding to fuel tank 10B.

[0019] Wall bodies 20A, 20B are made of steel and extend upward from upper deck 5. Wall bodies 20A, 20B preferably have a height equal to or greater than the height (dimension H) of fuel tanks 10A, 10B. 2 and 3, wall body 20A has a first wall portion 21A and a second wall portion 22A, and these first wall portion 21A and second wall portion 22A form an L-shape in plan view. Similarly, wall body 20B has a first wall portion 21B and a second wall portion 22B, and these first wall portion 21B and second wall portion 22B form an L-shape in plan view.

[0020] The first wall portion 21A of the wall body 20A is disposed between the fuel tank 10A and the superstructure 7. The first wall portion 21A of the wall body 20A extends from one of the ship's sides 3A toward the inside in the ship's width direction Dw. The second wall portion 22A of the wall body 20A extends from the end of the first wall portion 21A on the center side in the ship's width direction Dw to the stern 2b in the fore-aft direction FA. The first wall portion 21A of the wall body 20A separates the fuel tank 10A from the superstructure 7. The first wall portion 21A of the wall body 20A is disposed so as to cover the superstructure 7 when viewed from the fuel tank 10A.

[0021] The first wall portion 21B of the wall body 20B is disposed between the fuel tank 10B and the superstructure 7. The first wall portion 21B of the wall body 20B extends from the other ship side 3B toward the inside in the ship's width direction Dw. The first wall portion 21B of the wall body 20B is disposed so as to cover the superstructure 7 when viewed from the fuel tank 10B. The second wall portion 22B of the wall body 20B extends from the end of the first wall portion 21B on the center side in the ship's width direction Dw to the stern 2b in the fore-aft direction FA. The second wall portion 22A of the wall body 20A and the second wall portion 22B of the wall body 20B are disposed at an interval in the ship's width direction Dw.

[0022] The wall body 20A and the fuel tank 10A are connected by tank support members 25A and 26A. One end of the tank support member 25A is connected to the first wall portion 21A of the wall body 20A, and the other end is connected to the fuel tank 10A. The tank support member 26A has one end connected to the second wall portion 22A of the wall body 20A, and the other end connected to the fuel tank 10A. A plurality of the tank support members 25A and 26A are each arranged at intervals in the horizontal direction and in the ship height direction Dv.

[0023] The wall body 20B and the fuel tank 10B are connected by a plurality of tank support members 25B, 26B. One end of the tank support member 25B is connected to the first wall portion 21B of the wall body 20B, and the other end is connected to the fuel tank 10B. The tank support member 26B has one end connected to the second wall portion 22B of the wall body 20B, and the other end is connected to the fuel tank 10B. A plurality of the tank support members 25B, 26B are each arranged at intervals in the horizontal direction and in the ship height direction Dv.

[0024] An escape boat 40 is disposed between the second wall portion 22A of the wall body 20A and the second wall portion 22B of the wall body 20B. The escape boat 40 is provided on the upper deck 5 on the stern 2b side of the superstructure 7. The second wall portion 22A separates the fuel tank 10A from the escape boat 40. The second wall portion 22B separates the fuel tank 10B from the escape boat 40. When viewed from the fuel tanks 10A, 10B, the second wall portions 22A, 22B cover the escape boat 40.

[0025] A vent post 35 is disposed on the stern 2b side of the superstructure 7 on the upper deck 5. The vent post 35 is capable of discharging vent gas and the like from cargo tanks mounted in the cargo compartments of compartments S2 to S6 into the atmosphere. The vent post 35 also enables vent gas and the like from fuel tanks 10A, 10B and some compartments of compartment S1 to be discharged into the atmosphere during standby. In this embodiment, the vent post 35 is disposed, for example, on the stern 2b side of the first wall portion 21A of the wall body 20B.

[0026] (Action and effect) In the ship 1A of the above embodiment, the fuel tanks 10A, 10B extend with their longitudinal direction aligned with the ship height direction Dv. This makes it possible to increase the capacity of the fuel tanks 10A, 10B while reducing the area occupied by the fuel tanks 10A, 10B on the upper deck 5. Furthermore, because the fuel tanks 10A, 10B do not extend in the ship width direction Dw, sloshing, in which the fuel stored in the fuel tanks 10A, 10B sways together with the hull 2, is less likely to occur. Furthermore, the fuel tanks 10A, 10B are provided on the stern 2b side of the superstructure 7. This allows the fuel stored in the fuel tanks 10A, 10B to leak while the ship 1A is sailing, and the fuel will flow to the stern 2b side in the fore-aft direction FA, which is opposite the direction of travel of the hull 2. This prevents leaked fuel from reaching the superstructure 7 located on the bow 2a side in the fore-aft direction FA relative to the fuel tanks 10A, 10B. As a result, it is possible to efficiently increase the capacity of the fuel tanks 10A, 10B within the limited space on the upper deck 5.

[0027] Furthermore, the first wall portions 21A, 21B of the wall bodies 20A, 20B separate the fuel tanks 10A, 10B from the superstructure 7, so that even in the unlikely event of a fuel leak from the fuel tanks 10A, 10B, the fuel can be more effectively prevented from reaching the superstructure 7. The wall bodies 20A, 20B can also serve as a fire compartment for the superstructure 7. Therefore, by providing the wall bodies 20A, 20B, the distance between the fuel tanks 10A, 10B and the superstructure 7 in the fore-aft direction FA can be narrowed, allowing the limited space on the upper deck 5 to be used effectively.

[0028] Furthermore, by arranging the second wall portions 22A, 22B of the wall bodies 20A, 20B between the escape boat 40 and the fuel tanks 10A, 10B, even in the unlikely event that fuel stored in the fuel tanks 10A, 10B leaks, the fuel is prevented from reaching the escape boat 40.

[0029] Furthermore, by providing tank support members 25A, 25B, 26A, and 26B having one end connected to fuel tanks 10A and 10B and the other end connected to wall bodies 20A and 20B, fuel tanks 10A and 10B are firmly supported by wall bodies 20A and 20B via tank support members 25A, 25B, 26A, and 26B. This makes it possible to firmly and stably support fuel tanks 10A and 10B, whose longitudinal direction is in the ship height direction Dv.

[0030] Furthermore, by forming the wall bodies 20A, 20B to be at least as high as the fuel tanks 10A, 10B, even in the unlikely event that fuel stored in the fuel tanks 10A, 10B leaks, the fuel can be more effectively prevented from reaching the upper structure 7.

[0031] Furthermore, by providing a plurality of fuel tanks 10A, 10B in the ship width direction Dw, it is possible to efficiently increase the capacity of the fuel tanks 10A, 10B in the limited space on the upper deck 5.

[0032] Furthermore, by arranging the vent post 35 on the stern 2b side of the wall body 20B, it is possible to prevent the exhaust gas discharged from the vent post 35 from reaching the superstructure 7 side.

[0033] Second Embodiment Next, a second embodiment of a vessel according to the present disclosure will be described. The second embodiment described below differs from the first embodiment only in the configuration of the vessel. Therefore, the same parts as those in the first embodiment will be denoted by the same reference numerals and will not be described again. As shown in FIGS. 4 and 5, a vessel 1B of this embodiment mainly includes a hull 2B, a superstructure 7, fuel tanks 10A and 10B, and wall bodies 20C and 20D.

[0034] The upper deck 5 of the hull 2B in this embodiment has a first upper deck 5A on the bow 2a side and a second upper deck 5B on the stern 2b side. The second upper deck 5B formed on the stern 2b side of the upper deck 5 is formed at a lower position than the first upper deck 5A on the bow 2a side. The first upper deck 5A is formed closer to the bow 2a in the fore-aft direction FA than the second upper deck 5B, and is provided with a superstructure 7, engine casing 30, etc. The second upper deck 5B is disposed closer to the bow 2a in the fore-aft direction FA than the first upper deck 5A.

[0035] The fuel tanks 10A, 10B and wall bodies 20C, 20D are disposed on the second upper deck 5B. As in the first embodiment, the fuel tanks 10A, 10B are disposed at an interval in the ship's width direction Dw. The fuel tanks 10A, 10B each extend with their longitudinal direction aligned with the ship's height direction Dv.

[0036] Wall bodies 20C and 20D are arranged on the stern 2b side in the fore-aft direction FA with respect to the superstructure 7 and the engine casing 30. Wall bodies 20C and 20D are arranged corresponding to fuel tanks 10A and 10B, respectively. Wall body 20C is arranged corresponding to fuel tank 10A. Wall body 20D is arranged corresponding to fuel tank 10B.

[0037] Wall bodies 20C, 20D are made of steel and extend upward from second upper deck 5B, which is part of upper deck 5. Wall bodies 20C, 20D are preferably equal to or higher in height than fuel tanks 10A, 10B. Like walls 20A, 20B of the first embodiment, wall bodies 20C, 20D are each L-shaped in plan view and have first wall portions 21A, 21B and second wall portions 22A, 22B.

[0038] An escape boat 40 is disposed between the second wall portion 22A of the wall body 20C and the second wall portion 22B of the wall body 20D. The escape boat 40 is disposed on the second upper deck 5B, which is part of the upper deck 5. The vent post 35 is disposed on the stern 2b side of the first wall portion 21B of the wall body 20D. Since the vent post 35 needs to be set to a predetermined height or higher, it is disposed on the first upper deck 5A extending on the stern 2b side of the first wall portion 21B.

[0039] (Action and effect) In the ship 1B of the above embodiment, the fuel tanks 10A, 10B are disposed on the second upper deck 5B, which is formed at a lower position than the first upper deck 5A that supports the superstructure 7, thereby lowering the installation height of the fuel tanks 10A, 10B and the wall bodies 20A, 20B. This makes it possible to lower the center of gravity of the hull 2, which contributes to improving the stability of the hull 2. Furthermore, similar to the first embodiment described above, the fuel tanks 10A, 10B extend with the ship height direction Dv as their longitudinal direction, so that the capacity of the fuel tanks 10A, 10B can be efficiently increased in the limited space on the upper deck 5.

[0040] Furthermore, by having the first wall portions 21A, 21B of the wall bodies 20C, 20D separate the fuel tanks 10A, 10B from the superstructure 7, even in the unlikely event of a fuel leak from the fuel tanks 10A, 10B, the fuel can be more effectively prevented from reaching the superstructure 7. Furthermore, the wall bodies 20C, 20D can also serve as a fire compartment for the superstructure 7. Therefore, by providing the wall bodies 20C, 20D, the distance between the fuel tanks 10A, 10B and the superstructure 7 in the fore-aft direction FA can be narrowed, allowing the limited space on the upper deck 5 to be used effectively.

[0041] (Modification of the embodiment) In each of the above embodiments, the two fuel tanks 10A and 10B are individually surrounded by the wall bodies 20A and 20C and the wall bodies 20B and 20D, but the present invention is not limited to this. For example, as in a modified example of the embodiment shown in Figure 6, in a boat 1C, two fuel tanks 10E, 10F may be surrounded by a single wall body 20E. In this modified example of the embodiment, the two fuel tanks 10E, 10F are arranged at an interval in the ship's transverse direction Dw. Furthermore, in this modified example of the embodiment, the fuel tanks 10E, 10F are arranged offset to the other side of the ship's transverse direction Dw. The fuel tank 10E is arranged on one side of the ship's transverse direction Dw, and the fuel tank 10F is arranged on the other side of the ship's transverse direction Dw. The escape boat 40 is arranged on one side of the fuel tank 10E in the ship's transverse direction Dw.

[0042] The wall body 20E is disposed on the stern 2b side in the fore-aft direction FA relative to the superstructure 7 and the engine casing 30. The wall body 20E is made of steel and extends upward from the upper deck 5. The wall body 20E is preferably equal to or greater than the height (dimension H; see Figure 1) of the fuel tanks 10E, 10F. The wall body 20E is L-shaped in plan view and has a first wall portion 21E and a second wall portion 22E.

[0043] The first wall portion 21E is arranged between the fuel tanks 10E, 10F and the superstructure 7. The first wall portion 21E extends from the other ship side 3B toward the inside in the ship's width direction Dw. The second wall portion 22E extends from the end of the first wall portion 21E on the center side in the ship's width direction Dw to the stern 2b in the fore-aft direction FA. The first wall portion 21E separates the fuel tanks 10E, 10F from the superstructure 7. The first wall portion 21E is arranged so as to cover the superstructure 7 when viewed from the fuel tanks 10E, 10F.

[0044] The wall body 20E and the fuel tank 10E are connected by tank support members 25E, 26E, and 27E. A plurality of the tank support members 25E, 26E, and 27E are arranged at intervals in the horizontal direction and in the ship height direction Dv. One end of the tank support member 25E is connected to the first wall portion 21E, and the other end of the tank support member 25E is connected to the fuel tanks 10E and 10F. One end of the tank support member 26E is connected to the second wall portion 22E, and the other end of the tank support member 26E is connected to the fuel tank 10E. One end of the tank support member 27E is connected to the fuel tank 10E, and the other end of the tank support member 27E is connected to the fuel tank 10F.

[0045] The escape boat 40 is disposed on one side in the ship's width direction Dw of the second wall portion 22E of the wall body 20E. That is, the fuel tank 10F, the fuel tank 10E, the second wall portion 22E, and the escape boat 40 are disposed side by side in the ship's width direction Dw. The second wall portion 22E separates the fuel tank 10E from the escape boat 40. When viewed from the fuel tank 10E side, the second wall portion 22E covers the escape boat 40.

[0046] Even in this configuration, the fuel tanks 10E, 10F extend with the ship height direction Dv as the longitudinal direction, so that the capacity of the fuel tanks 10E, 10F can be increased. Furthermore, the first wall portion 21E of the wall body 20E separates the fuel tanks 10E, 10F from the upper structure 7, so that even in the unlikely event that fuel stored in the fuel tanks 10E, 10F leaks, the fuel can be more effectively prevented from reaching the upper structure 7. Furthermore, by arranging the second wall portion 22E of the wall body 20E between the escape boat 40 and the fuel tanks 10E, 10F, even in the unlikely event that fuel stored in the fuel tanks 10E, 10F leaks, the fuel is prevented from reaching the escape boat 40.

[0047] (Other embodiments) The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of the present disclosure. In the above embodiment, two fuel tanks 10A and 10B, and two fuel tanks 10E and 10F are provided, but the number of fuel tanks may be one or three or more. Furthermore, the fuel tanks may be arranged side by side in the fore-and-aft direction FA, not just in the width direction Dw.

[0048] Furthermore, in the above embodiment, the wall bodies 20A to 20E are L-shaped in plan view, but there are no limitations on the planar shape of the wall bodies 20A to 20E as long as the purpose of separating the fuel tanks 10A, 10B, 10E, and 10F from the superstructure 7, the escape boat 40, the evacuation route to the escape boat 40, and the like can be achieved. For example, the corner of the wall body 20A where the first wall portion 21A and the second wall portion 22A intersect may be shaped like an oblique chamfer in plan view. The same applies to the other wall bodies 20B to 20E. Alternatively, the wall bodies 20A to 20E may be arc-shaped in plan view or may have any other planar shape. Furthermore, in the above embodiment, the wall bodies 20A to 20E extend upward from the upper deck 5. However, for example, the wall bodies 20A to 20E may extend obliquely upward from the upper deck 5.

[0049] Furthermore, in the above embodiment, the vent post 35 is arranged on the fuel tank 10B, 10F side of the wall bodies 20B, 20D, 20E, but the vent post 35 can be appropriately changed to another position.

[0050] <Additional Notes> The ships 1A, 1B, and 1C described in the respective embodiments can be understood, for example, as follows.

[0051] (1) The ships 1A, 1B, and 1C according to the first embodiment comprise a hull 2 ​​having an upper deck 5, a superstructure 7 extending further upward from the upper deck 5 and having accommodation areas, and fuel tanks 10A, 10B, 10E, and 10F provided on the stern 2b side of the superstructure 7 on the upper deck 5 and extending with the ship height direction Dv as the longitudinal direction.

[0052] This makes it possible to increase the capacity of the fuel tanks 10A, 10B, 10E, and 10F while reducing the area occupied by the fuel tanks 10A, 10B, 10E, and 10F on the upper deck 5. Also, sloshing, in which the fuel stored in the fuel tanks 10A, 10B, 10E, and 10F sways together with the hull 2, is less likely to occur. Furthermore, by providing the fuel tanks 10A, 10B, 10E, and 10F on the stern 2b side of the superstructure 7, even in the unlikely event of a leak of fuel stored in the fuel tanks 10A, 10B, 10E, and 10F, the fuel will flow to the stern 2b side in the fore-aft direction FA, which is opposite the direction of travel of the hull 2. This prevents the leaked fuel from reaching the superstructure 7, which is located on the bow side of the fuel tanks 10A, 10B, 10E, and 10F in the fore-aft direction FA. As a result, it is possible to efficiently increase the capacity of the fuel tanks 10A, 10B, 10E, and 10F in the limited space on the upper deck 5.

[0053] (2) The ships 1A, 1B, 1C according to the second aspect are the ships 1A, 1B, 1C of (1), and are provided with wall bodies 20A to 20E extending upward from the upper deck 5 and having first wall portions 21A, 21B, 21E that separate the fuel tanks 10A, 10B, 10E, 10F from the superstructure 7.

[0054] As a result, the first wall portions 21A, 21B, 21E of the wall bodies 20A to 20E separate the fuel tanks 10A, 10B, 10E, 10F from the superstructure 7, so that even in the unlikely event of a fuel leak from the fuel tanks 10A, 10B, 10E, 10F, the fuel can be more effectively prevented from reaching the superstructure 7. The wall bodies 20A to 20E can also serve as fire compartments for the superstructure 7. Therefore, by providing the wall bodies 20A to 20E, the distance between the fuel tanks 10A, 10B, 10E, 10F and the superstructure 7 in the fore-aft direction FA can be narrowed, and the limited space on the upper deck 5 can be used effectively.

[0055] (3) The ships 1A, 1B, 1C according to the third aspect are the ships 1A, 1B, 1C of (2), further comprising an escape boat 40 on the stern 2b side of the superstructure 7 on the upper deck 5, and the wall bodies 20A to 20E have second wall portions 22A, 22B, 22E that separate the fuel tanks 10A, 10B, 10E, 10F from the escape boat 40.

[0056] As a result, by arranging the second wall portions 22A, 22B, 22E of the wall bodies 20A to 20E between the escape boat 40 and the fuel tanks 10A, 10B, 10E, 10F, even in the unlikely event that fuel stored in the fuel tanks 10A, 10B, 10E, 10F leaks, the fuel is prevented from reaching the escape boat 40.

[0057] (4) The ships 1A, 1B, 1C according to the fourth aspect are the ships 1A, 1B, 1C of (2) or (3), and further include tank support members 25A, 25B, 25E, 26A, 26B, 26E, 27E, one end of which is connected to the fuel tanks 10A, 10B, 10E, 10F, and the other end of which is connected to the wall bodies 20A to 20E.

[0058] As a result, by providing tank support members 25A, 25B, 25E, 26A, 26B, 26E, and 27E having one end connected to fuel tanks 10A, 10B, 10E, and 10F and the other end connected to wall bodies 20A to 20E, fuel tanks 10A, 10B, 10E, and 10F are supported by wall bodies 20A to 20E via tank support members 25A, 25B, 25E, 26A, 26B, 26E, and 27E. This makes it possible to stably support fuel tanks 10A, 10B, 10E, and 10F, whose longitudinal direction is in the ship height direction Dv.

[0059] (5) The ships 1A, 1B, and 1C according to the fifth aspect are the ships 1A, 1B, and 1C of (2) or (3), in which the wall bodies 20A to 20E are formed to a height equal to or greater than the height of the fuel tanks 10A, 10B, 10E, and 10F.

[0060] As a result, by forming the wall bodies 20A to 20E to be at least as high as the fuel tanks 10A, 10B, 10E, and 10F, even in the unlikely event that fuel stored in the fuel tanks 10A, 10B, 10E, and 10F leaks, the fuel can be more effectively prevented from reaching the upper structure 7.

[0061] (6) The ships 1A, 1B, and 1C according to the sixth aspect are the ships 1A, 1B, and 1C of (2) or (3), and the fuel tanks 10A, 10B, 10E, and 10F are arranged at intervals in the ship's width direction Dw of the hull 2.

[0062] As a result, by providing multiple fuel tanks 10A, 10B, 10E, and 10F in the ship's width direction Dw, it is possible to efficiently increase the capacity of the fuel tanks 10A, 10B, 10E, and 10F in the limited space on the upper deck 5.

[0063] (7) The ship 1B according to the seventh aspect is the ship 1B of (2) or (3), wherein the upper deck 5 comprises a first upper deck 5A located below the superstructure 7 and a second upper deck 5B formed on at least a part of the stern 2b side of the hull 2 ​​and at a lower position than the first upper deck 5A, and the fuel tanks 10A, 10B and the wall bodies 20C, 20D are arranged on the second upper deck 5B.

[0064] As a result, the installation height of the fuel tanks 10A, 10B and the wall bodies 20C, 20D is lowered by arranging the fuel tanks 10A, 10B on the second upper deck 5B, which is formed at a lower position than the first upper deck 5A that supports the superstructure 7. This makes it possible to lower the center of gravity of the hull 2, which contributes to improving the stability of the hull 2.

[0065] (8) The ships 1A, 1B, and 1C according to the eighth aspect are the ships 1A, 1B, and 1C of (2) or (3), and further include a vent post 35 for discharging gas generated within the hull 2 ​​to the outside, and the vent post 35 is arranged on the stern 2b side of the wall bodies 20A to 20E.

[0066] As a result, by arranging the vent post 35 on the stern 2b side of the wall bodies 20A to 20E, it is possible to prevent the gas discharged from the vent post 35 from reaching the superstructure 7 side. [Explanation of symbols]

[0067] 1A-1C...Vessel 2, 2B...Hull 2a...Bow 2b...Stern 3A, 3B...Side 4...Bottom 5...Upper deck 5A...First upper deck 5B...Second upper deck 6...Bottom deck 7...Superstructure 8...Screw 10A, 10B, 10E, 10F...Fuel tank 10b...Lower head section 10m...Tank body section 10t...Upper head section 11...Compartment wall 12...Support member 15...Prime motor 20A-20E...Wall 21A, 21B, 21E...First wall section 22A, 22B, 22E...Second wall section 25A, 25B, 25E, 26A, 26B, 26E...Tank support member 27E...Tank support member 30...Engine casing 35...Vent post 40...Escape boat S, S1 to S7...sections

Claims

1. A ship hull having an upper deck; a superstructure extending further upward from the upper deck and having a living area; a fuel tank provided on the upper deck on the stern side of the superstructure and extending with its longitudinal direction aligned with the ship height direction; a wall body extending upward from the upper deck and having a first wall portion that separates the fuel tank from the superstructure; an escape boat provided on the upper deck on the stern side of the superstructure, The wall body has a second wall portion that separates the fuel tank and the escape boat. ship.

2. A hull having an upper deck; a superstructure extending further upward from the upper deck and having a living area; a fuel tank provided on the upper deck on the stern side of the superstructure and extending with its longitudinal direction aligned with the ship height direction; a wall body extending upward from the upper deck and having a first wall portion that separates the fuel tank from the superstructure, The upper deck is a first upper deck located below the superstructure; a second upper deck formed on at least a portion of the stern side of the hull and positioned lower than the first upper deck; The fuel tank and the wall body are disposed on the second upper deck. ship.

3. A hull having an upper deck; a superstructure extending further upward from the upper deck and having a living area; a fuel tank provided on the upper deck on the stern side of the superstructure and extending with its longitudinal direction aligned with the ship height direction; a wall body extending upward from the upper deck and having a first wall portion that separates the fuel tank from the superstructure; a vent post for discharging gas generated within the hull to the outside, The vent post is disposed on the aft side of the wall. ship.

4. An escape boat is further provided on the stern side of the superstructure on the upper deck, The wall body has a second wall portion that separates the fuel tank and the escape boat.

4. A vessel according to claim 2 or 3.

5. a tank support member having one end connected to the fuel tank and the other end connected to the wall; A vessel according to any one of claims 1 to 3.

6. The wall is formed to a height equal to or greater than the height of the fuel tank. A vessel according to any one of claims 1 to 3.

7. The fuel tanks are arranged in plurality at intervals in the width direction of the hull. A vessel according to any one of claims 1 to 3.

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