Ship

Abstract

A ship is provided with: a hull having a pair of sides; the upper deck is arranged on the ship body; a tank provided in the hull, the upper portion of the tank extending through the center of the upper deck in the width direction of the hull and protruding above the upper deck; a tank cover that is provided on the inner side in the ship width direction with a space therebetween with respect to the pair of broadsides, covers the plurality of tanks from above, and has a top flat surface that extends in the fore-aft direction; and a bow deck formed so as to be continuous from the top flat surface toward the bow side, and extending across the width direction of the ship between the pair of broadsides.

Description

Technical Field

[0001] This invention relates to a ship.

[0002] This application claims priority based on Japanese Patent Application No. 2023-128012, filed on August 4, 2023, the contents of which are incorporated herein by reference. Background Technology

[0003] Liquefied gas (LPG) carriers have tanks within their hulls capable of storing LPG. LPG carriers are subject to certain limitations in terms of length, draft, and other key parameters depending on the equipment requirements of the ports where loading and unloading take place. In such cases, to increase the LPG carrying capacity, the upper part of the tank extends through a portion of the upper deck of the hull, protruding upwards. Patent Document 1 discloses a structure in which a tank cover is provided on the upper deck, the cover being configured to cover from above and protrude upwards from the upper part of the tank onto the upper deck. Furthermore, Patent Document 1 discloses a structure in which a mooring mechanism is provided on the upper deck, located further forward than the tank cover.

[0004] Previous technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-187190 Summary of the Invention

[0007] The technical problem to be solved by the invention

[0008] In the structure disclosed in Patent Document 1, the mooring mechanism is positioned on the upper deck further forward than the tank cover. The tank cover is located at a higher position than the upper deck on the bow side where the mooring mechanism is located. Therefore, if the tank is enlarged forward, the mooring area becomes narrower. Furthermore, if the mooring area where the mooring equipment is located is expanded aft, the tank becomes smaller. Therefore, it is difficult to increase the size of the tank while ensuring the required ship area.

[0009] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a vessel that can ensure the required mooring area while increasing the size of the tank.

[0010] means for solving technical problems

[0011] To address the aforementioned issues, the vessel of the present invention comprises a hull, an upper deck, tanks, tank covers, and a bow deck. The hull has a pair of sides. The upper deck is disposed within the hull. The tanks are disposed within the hull. The upper portion of the tank extends through the center of the upper deck in the ship's width direction and protrudes upwards beyond the upper deck. The tank covers are spaced apart from the pair of sides in the ship's width direction. The tank covers cover a plurality of tanks from above and have a flat top surface extending in the bow-stern direction. The bow deck is formed to be continuous from the flat top surface towards the bow. The bow deck extends in the ship's width direction between the pair of sides.

[0012] Invention Effects

[0013] The vessel according to the invention can increase the size of the tank while ensuring the required mooring area. Attached Figure Description

[0014] Figure 1 This is a side view of the ship involved in the embodiments of the present invention.

[0015] Figure 2 This is a top view of the ship involved in the embodiments of the present invention.

[0016] Figure 3 This is a cross-sectional view of the tank and tank cover of the vessel according to the embodiments of the present invention, viewed from the bow and stern.

[0017] Figure 4 This is a top view showing the top flat surface of the bow deck and the canister in an embodiment of the present invention.

[0018] Figure 5 This is a top view of the bow deck and the top flat surface of the canopy in a modified example of a ship according to an embodiment of the present invention. Detailed Implementation

[0019] The following is based on Figures 1 to 5 The ships involved in the embodiments of the present invention will be described.

[0020] (Ship structure)

[0021] like Figures 1 to 3 As shown, the vessel 1A illustrated in this embodiment is a liquefied gas carrier that transports liquefied gases such as LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), liquefied carbon dioxide, and liquefied ammonia. Vessel 1A is equipped with at least a hull 2, tanks 10, tank covers 20, a bow deck 30, and mooring equipment 40A. Furthermore, the type of vessel 1A is only one example and is not limited to liquefied gas carriers.

[0022] (Structure of the ship's hull)

[0023] Hull 2 ​​has a pair of sides 3A, 3B that form its outer shell, and bottom 4 (reference). Figure 1 , Figure 3 The hull 2 ​​has an upper deck 5. Sides 3A and 3B have a pair of side platings forming the port and starboard sides, respectively. The bottom 4 has a bottom plating connecting these sides 3A and 3B. Through these pairs of sides 3A and 3B and the bottom 4, the hull 2's outer shell is U-shaped in a section orthogonal to the bow-stern direction FA. The hull 2 ​​has an upper deck 5 on its upper part. The upper deck 5 is the uppermost deck located on the stern 2b side, which is further from the bow deck 30. In this embodiment, the upper deck 5 is an exposed deck with at least a portion of it exposed externally. The hull 2 ​​is spaced apart above the bottom 4 (bottom plating) and has an inner bottom 9 (see reference) forming a double bottom. Figure 3 ).

[0024] A superstructure 7 is formed on the hull 2. The superstructure 7 is formed, for example, on the upper deck 5 on the stern 2b side of the hull 2, and a living area is formed inside it.

[0025] The hull 2 ​​has a cargo loading area 8 (in other words, a cargo hold) on the side closer to the bow 2a than the superstructure 7. The cargo loading section 8 illustrated in this embodiment has an opening that is recessed below the bottom 4 in the vertical direction Dv relative to the upper deck 5 and opens upward.

[0026] (The structure of the can)

[0027] Tank 10 is disposed within the aforementioned cargo loading area 8. In this embodiment, for example, four tanks 10 are disposed at intervals along the bow-stern direction FA in the cargo loading area 8, which is located on the side of the cargo loading area 8 closer to the bow 2a than the upper structure 7. Alternatively, only one tank 10 may be disposed.

[0028] Each tank 10 is capable of storing liquefied gas within it. For example... Figure 3 As shown, the can 10 of this embodiment is an angular can, and includes a bottom wall portion 12, a pair of lower inclined wall portions 13, a pair of side wall portions 14, a pair of upper inclined wall portions 15, a top wall portion 16, and a pair of end wall portions 17.

[0029] The bottom wall portion 12 is supported from below on the inner bottom 9 by a plurality of tank support members 19. The bottom wall portion 12 runs along a surface intersecting the vertical direction Dv. When viewed from the vertical direction Dv, the bottom wall portion 12 is rectangular plate-shaped. A pair of lower inclined wall portions 13 extend upward from the two end edges of the lower inclined wall portions 13 in the ship width direction Dw and outward incline inward inward in the ship width direction Dw. A pair of side wall portions 14 extend upward from the upper ends of each of the pair of lower inclined wall portions 13. The pair of side wall portions 14 are spaced apart in the ship width direction Dw and are arranged to be spaced apart from the sides 3A, 3B and along the sides 3A, 3B. A pair of upper inclined wall portions 15 extend upward from the upper ends of each of the pair of side wall portions 14 and inward inward inward in the ship width direction Dw. A top wall portion 16 is arranged to connect the upper end edges of the pair of upper inclined wall portions 15 to each other. The top wall portion 16 extends in the direction intersecting the vertical direction Dv, i.e., the ship width direction Dw. When viewed from above, the top wall 16 appears as a rectangular plate.

[0030] The tank 10 of this embodiment has a cylindrical portion 18 with a polygonal cross-section that extends in the bow-stern direction FA, formed by the bottom wall portion 12, a pair of lower inclined wall portions 13, a pair of side wall portions 14, a pair of upper inclined wall portions 15 and a top wall portion 16.

[0031] like Figure 1 , Figure 2 As shown, a pair of end walls 17 are configured to block the openings on both sides of the cylindrical portion 18 in the bow-stern direction FA, respectively. Each end wall 17 is located along a surface intersecting the bow-stern direction FA. Furthermore, the shape, number, and layout of the tanks 10 disposed in the cargo loading area 8 of the hull 2 ​​can be appropriately modified. For example, the tank 10 can be a cylindrical, spherical, or square shape with a circular cross-section extending in the bow-stern direction FA.

[0032] like Figure 1 , Figure 3 As shown, the upper part 10a of the tank 10 in the vertical direction Dv is located above the upper deck 5 of the hull 2. That is, each tank 10 is configured to protrude upwards beyond the upper deck 5. More specifically, as... Figure 3 As shown, an opening 5h is formed in the center of the upper deck 5 in the ship width direction Dw, and the upper part 10a of each tank 10 protrudes above the upper deck 5 through the opening 5h formed in the center of the upper deck 5 in the ship width direction Dw.

[0033] A can cover 20 is positioned on the upper deck 5. The can cover 20 covers the tank 10 from above in the vertical direction (Dv). The can cover 20 continuously covers multiple tanks 10 arranged in the bow and stern direction (FA). For example... Figure 3 As shown, in this embodiment, the can cover 20 only covers the upper part 10a, which protrudes upwards from the top of the upper deck 5.

[0034] like Figure 3 As shown, the tank cover 20 is arranged at a distance in the vertical direction Dv from the upper part 10a of the tank 10 protruding upward from the upper deck 5. In other words, the inner surface 20g of the tank cover 20 facing the tank 10 is arranged at a distance in the vertical direction Dv from the outer surface 10f of the upper part 10a of the tank 10. Moreover, the tank cover 20 is arranged at a distance in the width direction Dw from the pair of sidewalls 3A and 3B.

[0035] The can cover 20 has a pair of sidewall portions 21A and 21B and a top flat surface 24. Moreover, the sidewall portions 21A and 21B illustrated in this embodiment each have an upper portion 21a and a lower portion 21b.

[0036] The lower portion 21b of the cover sidewall 21A extends upward from a position relative to the side 3A at a predetermined distance in the ship's width direction Dw. The upper portion 21a of the cover sidewall 21A extends upward at an inward angle in the ship's width direction Dw. The cover sidewall 21B is formed symmetrically to the cover sidewall 21A. In the upper deck 5, the lower portion 21b of the cover sidewall 21B extends upward from a position relative to the side 3B at a predetermined distance in the ship's width direction Dw. In this embodiment, the upper portion 21a of the cover sidewall 21B extends upward at an inward angle in the ship's width direction Dw.

[0037] The top flat surface 24 connects the upper ends of a pair of cover sidewall portions 21A and 21B to each other. For example... Figure 2 As shown, when viewed from above, the top flat surface 24 has a planar rectangular shape with the bow-to-stern direction FA as the longer side and the width direction Dw as the shorter side. The top flat surface 24 extends in the width direction Dw, which intersects the vertical direction Dv. The top flat surface 24 can be a plane; for example, it can gradually slope downwards or curve outwards from the center of the width direction Dw toward the two outer sides of the width direction Dw, as long as it does not obstruct the installation of the mooring equipment 40A described later or the walking movement of personnel on the top flat surface 24.

[0038] like Figure 2 , Figure 3 As shown, the upper deck 5 has a pair of passageways 51A and 51B. Passageway 51A protrudes upward between the cover sidewall 21A and the sidewall 3A, and extends in the bow-stern direction FA. Passageway 51B protrudes upward between the cover sidewall 21B and the sidewall 3B, and extends in the bow-stern direction FA. Passageways 51A and 51B each have a width sufficient to allow workers to pass through. Thus, workers can move between passageways 51A and 51B.

[0039] And, as Figure 1 , Figure 2As shown, in this embodiment, passage sections 51A and 51B are equipped with equipment type 100 such as manifold 101. Manifold 101 has connection ports for attaching and detaching external piping (not shown) for supplying liquefied gas from outside the ship 1A to the tank 10, and external piping (not shown) for discharging liquefied gas stored in the tank 10 to the outside. Furthermore, the equipment type 100 provided in the passage sections 51A and 51B is not limited to manifold 101. Equipment type 100 other than manifold 101 may also be provided in the passage sections 51A and 51B.

[0040] Figure 4 This is a top view showing the flat top surface of the bow deck and the tank cover in this embodiment.

[0041] like Figure 1 , Figure 2 , Figure 4 As shown, the bow deck 30 is disposed on the bow 2a side relative to the canister 20. The bow deck 30 is formed to be continuous with the top flat surface 24 of the canister 20 in the bow-stern direction FA. The bow deck 30 is disposed above the upper deck 5 by a predetermined dimension in the vertical direction Dv. In this embodiment, the bow deck 30 and the top flat surface 24 are formed at the same height and are continuously formed in the bow-stern direction FA. However, the bow deck 30 and the top flat surface 24 are not limited to being at the same height. For example, there may be a certain height difference in the vertical direction Dv between the bow deck 30 and the top flat surface 24, to the extent that a person can directly move between the bow deck 30 and the top flat surface 24. Moreover, the bow deck 30 and the top flat surface 24 may also be provided at intervals in the bow-stern direction FA, so that a person can directly move between the bow deck 30 and the top flat surface 24. In this case, to facilitate the movement of workers, a plate-like component (not shown) can be installed between the bow deck 30 and the top flat surface 24.

[0042] like Figure 4 As shown, the bow deck 30 extends in the width direction Dw, covering the area between a pair of sides 3A and 3B. The width dimension W1 of the bow deck 30 at the aft edge 30t on the side closest to the stern 2b is greater than the width dimension W2 of the top flat surface 24 of the canopy 20 at the leading edge 24s on the side closest to the bow 2a.

[0043] like Figure 1 , Figure 4 As shown, in this embodiment, the upper deck 5 is located on the stern 2b side, which is further from the bow deck 30 in the bow-to-stern direction FA. The edge 5s on the bow 2a side of the upper deck 5 (refer to...) Figure 1The upper deck 5 is connected to the stern 2b side of the bow deck 30 via a vertical wall 35 extending in the vertical direction Dv. This creates a height difference between the upper deck 5 and the bow deck 30. Steps or ladders (not shown) can be installed at this height difference to allow workers to move up and down between the upper deck 5 and the bow deck 30.

[0044] like Figure 4 As shown, the mooring equipment 40A includes a mooring device 41A and a mooring guide 45A. The mooring device 41A includes a mooring canister (not shown) capable of releasing and winding the mooring line 42. The mooring guide 45A guides the mooring line 42 released from the mooring canister (not shown) of the mooring device 41A. Examples of mooring guides 45A include a deck support roller 46A for changing the direction of the mooring line 42 and a closed guide 47A having insertion holes 47h for the mooring line 42 to pass through.

[0045] At least a portion of such a mooring device 40A is disposed on the bow deck 30. In this embodiment, for example, the mooring device 41A and the deck support roller 46A are disposed on the bow deck 30. For example, the mooring device 41A is disposed at the center of the bow deck 30 in the ship's width direction Dw. The mooring line 42, released from the mooring tube (not shown) of the mooring device 41A, is routed through the deck support roller 46A, and its routing direction is changed so that it extends to the sides 3A and 3B in the ship's width direction Dw. The sides 3A and 3B of the bow deck 30 in the ship's width direction Dw protrude higher than the upper surface 30f of the bow deck 30. Moreover, the closed guide 47A of this embodiment is formed in the portion of the sides 3A and 3B that protrudes higher than the upper surface 30f of the bow deck 30. The mooring line 42 is led out of the ship (land, etc.) through the closed guide 47A.

[0046] (Effects)

[0047] In the vessel 1A described above, the bow deck 30 is formed to be continuous from the top flat surface 24 of the tank cover 20. Therefore, the area reaching the top flat surface 24 can be used for various purposes, in addition to the bow deck 30. When a mooring device 40A is installed on the bow deck 30, personnel handling the mooring device 40A can work not only on the bow deck 30 but also within the area reaching the top flat surface 24, thereby improving workability. That is, it is not necessary to ensure working space for handling the mooring device 40A only on the bow deck 30, increasing the freedom of arrangement of the mooring device 40A on the bow deck 30. Furthermore, due to the convenience of the arrangement space for the mooring device 40A, the bow deck 30 is prevented from expanding towards the stern 2b. Therefore, the tank 10 can be increased while ensuring the required vessel area. Furthermore, to increase the arrangement space for carrying the mooring device 40A, it is not necessary to miniaturize the tank 10 or the tank cover 20. As a result, it is possible to increase the space for configuring mooring equipment 40A and the like while suppressing the reduction in the amount of liquefied gas carried, thereby increasing the degree of freedom in configuring mooring equipment 40A and the like.

[0048] Furthermore, by making the bow deck 30 continuous from the top flat surface 24 of the canister 20, the air resistance experienced by the canister 20 can be reduced, thereby suppressing fuel consumption during the navigation of the ship 1A. Moreover, it is easy for people to move between the top flat surface 24 and the bow deck 30, thus reducing the burden on the personnel performing mooring operations.

[0049] Furthermore, in the above embodiment, the upper surface 30f of the bow deck 30 and the top flat surface 24 are formed at the same height. This allows for easy movement of personnel between the bow deck 30 and the top flat surface 24. Moreover, when it is necessary to traverse the mooring lines 42, etc., between the bow deck 30 and the top flat surface 24, it prevents the mooring lines 42, etc., from contacting the top flat surface 24 and obstructing normal mooring operations, and allows for smooth insertion and removal of the mooring lines 42, etc.

[0050] Furthermore, in the above embodiment, at least a portion of the mooring equipment 40A is disposed on the bow deck 30. Therefore, when handling the mooring equipment 40A, workers can utilize not only the bow deck 30 but also the top flat surface 24 as working space, thereby improving workability.

[0051] Furthermore, in the above embodiment, passageways 51A and 51B are provided between the tank cover 20 and the pair of side panels 3A and 3B. This ensures sufficient movement space for personnel in the bow-stern direction FA. Moreover, since equipment such as manifold 101 can be installed in the passageways 51A and 51B, as in the case where the equipment 100 is installed on the upper part of the tank cover 20, it is possible to prevent the vertical position (Dv) of the equipment 100 from becoming too high and compatibility with the ship from being compromised.

[0052] (Modifications of the implementation method)

[0053] Figure 5 This is a top view showing the bow deck and the top flat surface of the canopy in a modified example of the ship according to this embodiment.

[0054] In the above embodiment, the mooring device 41A and the deck support roller 46A in the mooring equipment 40A are disposed on the bow deck 30, and the closed guide cable 47A is formed on the upper end 3t of the sides 3A and 3B on both sides of the bow deck 30 in the ship width direction Dw, but is not limited thereto.

[0055] like Figure 5 In a variation of this embodiment shown, in the vessel 1B, the mooring device 41B of the mooring equipment 40B can be positioned on the bow deck 30, and the deck support roller 46B (serving as a mooring guide 45B) and the closed guide 47B can be positioned on the top flat surface 24 of the canister 20. In this case, the mooring line 42, released from the mooring tube (not shown) of the mooring device 41B, extends towards the stern 2b, and through the deck support roller 46B, extends towards the sides 3A and 3B, thus changing the direction of the mooring. The closed guide 47B is provided at both ends of the top flat surface 24 in the width direction Dw of the vessel. The closed guide 47B is configured to protrude upwards from both ends of the top flat surface 24. The mooring line 42 is led outwards (to land, etc.) through the insertion holes 47g formed in the closed guide 47B.

[0056] In the modified ship 1B based on the above embodiment, the bow deck 30 is formed to be continuous from the top flat surface 24 of the canopy 20. Therefore, a portion of the mooring guide 45B of the mooring equipment 40B can be disposed on the top flat surface 24 of the canopy 20. Thus, the degree of freedom in the configuration of the mooring equipment 40B can be increased.

[0057] (Other implementation methods)

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to these embodiments and may include design changes that do not depart from the spirit of the present invention.

[0059] For example, in the above embodiment, the upper deck 5 is positioned further to the stern 2b than the bow deck 30 in the bow-stern direction FA, but it is not limited to this. The upper deck 5 can be a full-length deck extending from the bow 2a to the stern 2b in the bow-stern direction FA of the hull 2. In this case, the bow deck 30 is positioned at intervals above the bow 2a end of the upper deck 5.

[0060] Furthermore, the cross-sectional shape of the canister 20 when viewed from the bow-stern direction FA is not limited to the structure illustrated in the above embodiment. If the cross-sectional shape of the canister 20 has a top flat surface 24, it can be appropriately changed to other shapes. Moreover, the top flat surface 24, such as a continuous bow deck 30, is not limited to being formed entirely on the bow-stern direction FA of the canister 20; for example, it may be formed only on a portion of the bow 2a side.

[0061] Furthermore, in the above embodiment, the can cover 20 continuously covers multiple cans 10, but it is not limited to this. The can cover 20 may also be configured to cover multiple cans 10 separately. In this case, the bow deck 30 is formed to be continuous with the top flat surface 24 of the can cover 20 located on the side closest to the bow 2a in the bow-stern direction FA.

[0062] Furthermore, in the above embodiment, a closed cable guide 47B was described as an example, but the cable guide is not limited to a closed cable guide.

[0063] Furthermore, the bow deck 30 is not limited to being formed at a certain height in both the bow-stern direction FA and the beam direction Dw. For example, it can slope or curve downwards gradually from the center of the beam direction Dw toward the two outer sides of the beam direction Dw, similar to the top flat surface 24. Moreover, the bow deck 30 can slope or form a slight height difference from the aft edge 30t on the stern 2b side toward the bow 2a side.

[0064] Furthermore, the above embodiment describes the case where the mooring equipment 40A is installed on the bow deck 30. However, the mooring equipment 40A is not limited to being installed on the bow deck 30. In that case, for example, the mooring equipment 40A can be installed above a deck (not shown) that is lower than the bow deck 30.

[0065] Furthermore, although the examples illustrate vessels 1A and 1B as liquefied gas carriers, they are not limited to this. Vessels 1A and 1B could be other types of vessels, such as chemical tankers or crude oil tankers.

[0066] <Postscript>

[0067] The vessels 1A and 1B described in the implementation method can be understood as follows, for example.

[0068] (1) The vessels 1A and 1B involved in the first method include: a hull 2 ​​having a pair of sides 3A and 3B; an upper deck 5 disposed on the hull 2; a tank 10 disposed inside the hull 2, the upper part 10a of which penetrates the center of the upper deck 5 in the width direction Dw and protrudes above the upper deck 5; a tank cover 20 disposed at intervals relative to the pair of sides 3A and 3B in the width direction Dw, covering the plurality of tanks 10 from above, and having a top flat surface 24 extending in the bow-stern direction FA; and a bow deck 30 formed to be continuous from the top flat surface 24 toward the bow 2a side and extending throughout the width direction Dw between the pair of sides 3A and 3B.

[0069] Therefore, in addition to the bow deck 30, the area reaching the top flat surface 24 can be used for various purposes. This increases the flexibility in configuring mooring equipment 40A, 40B, etc. Furthermore, the expansion of the bow deck 30 towards the stern 2b is prevented, depending on the available space for the mooring machinery 40A, 40B, etc. That is, to increase the space for configuring mooring equipment 40A, 40B, it is not necessary to miniaturize the tank 10 or the tank cover 20. As a result, while suppressing the reduction in the amount of liquefied gas carried, the space for configuring mooring equipment 40A, 40B, etc., can be increased, thereby increasing the flexibility in configuring mooring equipment 40A, 40B, etc.

[0070] Furthermore, the bow deck 30 is formed to extend from the top flat surface 24 of the canister 20, thereby reducing the air resistance on the canister 20 and thus suppressing the fuel consumption of ships 1A and 1B during navigation.

[0071] (2) The vessels 1A and 1B involved in the second method are the vessels 1A and 1B of (1), wherein the upper surface 30f of the bow deck 30 and the top flat surface 24 are formed at the same height.

[0072] This prevents mooring lines 42 from getting stuck on the height difference between the bow deck 30 and the top flat surface 24. Furthermore, it facilitates easy movement of personnel between the bow deck 30 and the top flat surface 24.

[0073] (3) The vessels 1A and 1B involved in the third method are vessels 1A and 1B of (1) or (2), wherein at least a portion of the mooring equipment 40A and 40B is arranged on the bow deck 30, the mooring equipment 40A and 40B including: mooring devices 41A and 41B, capable of releasing or winding mooring lines 42; and mooring guides 45A and 45B, capable of guiding the mooring lines 42 released from the mooring devices 41A and 41B.

[0074] As mooring guide components 45A and 45B, deck support rollers 46A and 46B and closed-type cable guides 47A and 47B can be raised.

[0075] Therefore, by arranging at least a portion of the mooring equipment 40A and 40B on the bow deck 30, the mooring equipment 40A and 40B can also be arranged on the top flat surface 24 of the tank cover 20, and are not limited to being arranged on the bow deck 30. Furthermore, when handling the mooring equipment 40A and 40B, not only the bow deck 30 can be used as a working space, but also the top flat surface 24 can be used as a working space, thereby improving workability.

[0076] (4) The vessels 1A and 1B involved in the fourth method are any one of (1) to (3) vessels 1A and 1B, wherein the upper deck 5 has: passage portions 51A and 51B that are exposed upward between the canister 20 and the pair of said sides 3A and 3B and extend in the bow and stern direction FA.

[0077] Therefore, by providing passageways 51A and 51B between the tank cover 20 and the pair of side panels 3A and 3B, it is possible to ensure the movement space of the workers towards the bow and stern FA. Furthermore, equipment such as manifolds 101 can also be installed in the passageways 51A and 51B.

[0078] Industrial availability

[0079] The vessel according to the invention can increase the size of the tank while ensuring the required mooring area.

[0080] Symbol Explanation

[0081] 1A, 1B - Ship; 2 - Hull; 2a - Bow; 2b - Stern; 3A, 3B - Side; 3t - Upper End; 4 - Bottom; 5 - Upper Deck; 5h - Opening; 5s - Edge; 6 - Bottom Deck; 7 - Superstructure; 8 - Cargo Loading Section; 9 - Inner Bottom; 10 - Tank; 10a - Upper Part; 10f - Outer Surface; 12 - Bottom Wall; 13 - Lower Sloping Wall; 14 - Side Wall; 15 - Upper Sloping Wall; 16 - Top Wall; 17 - End Wall; 18 - Cylindrical Part; 19 - Tank Support Component; 20 - Tank Cover; 20g - Inner Surface; 21A, 21B - Cover Side Wall Section, 24-Top flat surface, 24s-Leading edge, 30-Bow deck, 30f-Upper surface, 30t-Stern edge, 35-Vertical bulkhead, 40A, 40B-Mooring equipment, 41A, 41B-Mooring device, 42-Mooring cable, 45A, 45B-Mooring guide, 46A, 46B-Deck support roller, 47A, 47B-Closed guide, 47g, 47h-Through hole, 51A, 51B-Passage section, 100-Equipment, 101-Manifold, Dv-Up / down direction, FA-Fore-and-aft direction, Dw-Breadth direction, W1-Breadth dimension, W2-Breadth dimension.

Claims

1. A ship having: The hull has a pair of sides; Upper deck, located on the hull; The tank is located inside the hull and extends upward beyond the upper deck, passing through the center of the ship's width in the direction of the upper deck. A can cover, spaced apart from the pair of said sides in the width direction, covers the plurality of said cans from above and has a flat top surface extending in the bow-stern direction; and The bow deck is formed to be continuous from the top flat surface to the bow side and extends throughout the width direction between the pair of said sides.

2. The vessel according to claim 1, wherein, The upper surface of the bow deck is at the same height as the top flat surface.

3. The vessel according to claim 1 or 2, wherein, At least a portion of the mooring equipment is installed on the bow deck. The mooring equipment includes: Mooring device, capable of releasing and reeling in mooring lines; and A mooring guide is provided to guide the mooring line released from the mooring device.

4. The vessel according to claim 1 or 2, wherein, The upper deck includes a passageway that protrudes upward between the canister and a pair of the sides and extends in the bow-stern direction.

Images