Ship

Abstract

To provide a ship capable of properly controlling the seawater flowing into a double bottom space and of ensuring ship stability.SOLUTION: A ship comprises a pair of broadsides and a hull with a ship bottom. The hull comprises a bottom shell forming a ship bottom, an inner bottom deck provided above the bottom shell, a pair of longitudinal bulkheads provided inside in the ship width direction against the pair of broadsides and extending in the bow / stern direction, a transverse watertight bulkhead to form multiple double bottom compartments by dividing the double bottom space formed among the bottom shell, the inner bottom deck, and the pair of the longitudinal bulkheads, in the bow / stern direction, and a compartment opening / closing part provided in the transverse watertight bulkhead and to switch between the connected and disconnected states of the compartments.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to ships.

Background Art

[0002] In a ship, even if the side of the ship or the like is damaged and seawater enters the ship's hull, it is desired to ensure the recoverability of the hull. Patent Document 1 discloses a configuration provided with seawater introduction means on the lowermost watertight deck above the double bottom space (void space) of the ship's bottom. According to this configuration, when the ship's side outer plate or the like is damaged and seawater enters the ship, by opening the seawater introduction means, the seawater that has entered the ship is introduced into the double bottom space, and the double bottom space is made to function as a kind of seawater ballast tank, so that the restoring force of the ship can be restored.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration described in Patent Document 1, depending on the location and scale of the damage to the side of the ship, there is a possibility that the amount of seawater flowing into the double bottom space may become excessive. Therefore, it is desired to appropriately control the seawater flowing into the double bottom space according to the location and scale of the damage to the side of the ship, and ensure the recoverability of the ship.

[0005] This disclosure has been made to solve the above problems, and an object thereof is to provide a ship capable of appropriately controlling the seawater flowing into the double bottom space and ensuring the recoverability of the ship.

Means for Solving the Problems

[0006] In order to solve the above problems, the ship according to the present disclosure includes a hull having a pair of side hulls and a bottom hull. The hull includes an outer bottom plate, an inner bottom deck, a pair of longitudinal bulkheads, a transverse watertight bulkhead, and an opening / closing part. The outer bottom plate forms the bottom hull. The inner bottom deck is provided above the outer bottom plate. The pair of longitudinal bulkheads are provided on the inner side in the ship width direction with respect to the pair of side hulls and extend in the fore-and-aft direction of the ship. The transverse watertight bulkhead divides the double bottom space formed between the outer bottom plate, the inner bottom deck, and the pair of longitudinal bulkheads in the fore-and-aft direction to form a plurality of double bottom compartments. The opening / closing part is provided on the transverse watertight bulkhead and switches the communication / non-communication state between the double bottom compartments.

Advantages of the Invention

[0007] According to the ship of the present disclosure, the seawater flowing into the double bottom space can be appropriately controlled, and the recoverability of the ship can be ensured.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0009] <First Embodiment> Hereinafter, a ship according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 8. (Overall Configuration of the Ship) As shown in FIG. 1, the ship 1A of the present embodiment includes a hull 2. The ship type of the ship 1A is not limited to a specific one. Examples of the ship type of the ship 1A include a ferry, a RORO ship (Roll-on / Roll-off ship), a PCTC (Pure Car & Truck Carrier), and the like.

[0010] (Configuration of the Hull) The hull 2 has a pair of side plates 3A and 3B forming its outer shell, and a bottom 4. The side plates 3A and 3B have a pair of side shell plates forming the left and right side plates respectively. The bottom 4 has a bottom shell plate 9 connecting these side plates 3A and 3B.

[0011] The hull 2 is provided with a plurality of decks 7 including a freeboard deck 5, an inner bottom deck 6, and an upper deck 8 inside. The freeboard deck 5 is the lowest all-through deck among the all-through decks arranged above the full-load draft line. The inner bottom deck 6 is provided spaced above the bottom shell plate 9. The inner bottom deck 6 forms a double bottom together with the bottom shell plate 9. The upper deck 8 is the uppermost all-through deck among the all-through decks. An upper structure 15 is provided on the upper deck 8 of the hull 2, for example, on the side closer to the stern 2b.

[0012] FIG. 2 is a plan sectional view of the double bottom space of the ship according to the first embodiment of the present disclosure. As shown in FIGS. 1 and 2, inside the hull 2, a first rear transverse partition 21, a second rear transverse partition 22, and a third rear transverse partition 23 are provided. The first rear transverse partition 21, the second rear transverse partition 22, and the third rear transverse partition 23 are arranged in the order of the first rear transverse partition 21, the second rear transverse partition 22, and the third rear transverse partition 23 from the stern 2b side to the bow 2a side in the fore-and-aft direction FA of the ship. The first rear transverse partition 21 is provided at a distance from the second rear transverse partition 22 on the stern 2b side in the fore-and-aft direction FA. The second rear transverse partition 22 is provided at a distance from the third rear transverse partition 23 on the stern 2b side in the fore-and-aft direction FA.

[0013] Each of the first rear transverse partition 21, the second rear transverse partition 22, and the third rear transverse partition 23 is a watertight partition that closes the space between one side 3A of the ship's breadth direction Dw, the other side 3B, the freeboard deck 5, and the outer bottom plate 9. These first rear transverse partition 21, second rear transverse partition 22, and third rear transverse partition 23 form the main engine room R1 and the generator room R2 by partitioning the space between the freeboard deck 5 and the inner bottom deck 6 in the hull 2 in the fore-and-aft direction FA. The main engine room R1 is formed between the first rear transverse partition 21 and the second rear transverse partition 22. The generator room R2 is formed between the second rear transverse partition 22 and the third rear transverse partition 23.

[0014] FIG. 3 is an enlarged plan sectional view showing a part of the double bottom space in FIG. 2. As shown in FIGS. 2 and 3, inside the hull 2, on the bow 2a side in the fore-and-aft direction FA with respect to the third rear transverse partition 23, a pair of longitudinal through partitions 50A, 50B, a plurality of side partitions 30A, 30B, and a transverse watertight partition 40 are provided.

[0015] The pair of longitudinal through partitions 50A, 50B are provided on both sides in the ship's breadth direction Dw. One longitudinal through partition 50A is provided at a distance from one side 3A on the inner side in the ship's breadth direction Dw. The other longitudinal through partition 50B is provided at a distance from the other side 3B on the inner side in the ship's breadth direction Dw. Each of the pair of longitudinal through partitions 50A, 50B extends in the fore-and-aft direction FA.

[0016] The plurality of side bulkheads 30A and 30B are provided on both sides in the ship width direction Dw. The side bulkhead 30A provided on one side in the ship width direction Dw is provided with a plurality of them at intervals in the fore-and-aft direction FA between one side shell 3A and one longitudinal bulkhead 50A. These plurality of side bulkheads 30A are watertight bulkheads that block the space between one side shell 3A and one longitudinal bulkhead 50A. The plurality of side bulkheads 30A in the present embodiment are provided in the order of the first side bulkhead 31A, the second side bulkhead 32A, the third side bulkhead 33A, the fourth side bulkhead 34A, and the fifth side bulkhead 35A from the stern 2b side to the bow 2a side in the fore-and-aft direction FA.

[0017] The plurality of side bulkheads 30A form a plurality of side compartments 100A by partitioning the space between one side shell 3A and one longitudinal bulkhead 50A in the fore-and-aft direction FA. The plurality of side compartments 100A in the present embodiment are provided in the order of the first side compartment 101A, the second side compartment 102A, the third side compartment 103A, the fourth side compartment 104A, the fifth side compartment 105A, and the sixth side compartment 106A from the stern 2b side to the bow 2a side in the fore-and-aft direction FA.

[0018] The side bulkhead 30B provided on the other side in the ship width direction Dw is provided with a plurality of them at intervals in the fore-and-aft direction FA between the other side shell 3B and the other longitudinal bulkhead 50B. These plurality of side bulkheads 30B are watertight bulkheads that block the space between the other side shell 3B and the other longitudinal bulkhead 50B. The plurality of side bulkheads 30B in the present embodiment are provided in the order of the first side bulkhead 31B, the second side bulkhead 32B, the third side bulkhead 33B, the fourth side bulkhead 34B, and the fifth side bulkhead 35B from the stern 2b side to the bow 2a side in the fore-and-aft direction FA.

[0019] The plurality of side bulkheads 30B form a plurality of side compartments 100B by partitioning the space between the other side shell 3B and the other longitudinal bulkhead 50B in the fore-and-aft direction FA. The plurality of side compartments 100B are provided in the order of the first side compartment 101B, the second side compartment 102B, the third side compartment 103B, the fourth side compartment 104B, the fifth side compartment 105B, and the sixth side compartment 106B from the stern 2b side to the bow 2a side in the fore-and-aft direction FA.

[0020] In this embodiment, an example is illustrated in which a plurality of side bulkheads 30A provided on one side in the ship width direction Dw and a plurality of side bulkheads 30B provided on the other side in the ship width direction Dw are provided at the same positions in the fore-and-aft direction FA of the ship. In this case, a plurality of side rooms 100A provided on one side in the ship width direction Dw and a plurality of side rooms 100B provided on the other side in the ship width direction Dw are arranged symmetrically in the ship width direction Dw. Note that the plurality of side bulkheads 30A provided on one side in the ship width direction Dw and the plurality of side bulkheads 30B provided on the other side in the ship width direction Dw are not limited to the above arrangement, and they may be provided at different positions in the fore-and-aft direction FA of the ship.

[0021] In this embodiment, the first side rooms 101A and 101B are provided, for example, as fin stabilizer spaces. The second side rooms 102A and 102B are provided, for example, as healing tanks. The third side rooms 103A and 103B are provided, for example, as sewage treatment rooms. The fourth side rooms 104A and 104B are provided, for example, as fresh water tanks. The fifth side rooms 105A and 105B and the sixth side rooms 106A and 106B are provided, for example, as voids.

[0022] FIG. 4 is a cross-sectional view taken along the line A-A of FIG. 3. As shown in FIG. 4, in each of the first side rooms 101A and 101B as fin stabilizer spaces, a bottom deck 61 that forms the bottom surface of the fin stabilizer space is provided at the same height as the inner bottom deck 6. The bottom deck 61 may be a watertight deck or a non-watertight deck. Below the bottom deck 61 in each of the first side rooms 101A and 101B, a void 101s is provided.

[0023] FIG. 5 is a cross-sectional view taken along the line B-B of FIG. 3. As shown in Fig. 5, in each of the third side chambers 103A and 103B serving as the waste treatment chambers, a bottom deck 63 that forms the bottom surface of the waste treatment chamber is provided at the same height as the inner bottom deck 6. The bottom deck 63 may be a watertight deck or a non-watertight deck. Below the bottom deck 63 in each of the third side chambers 103A and 103B, there is a void 103s.

[0024] As shown in Fig. 3, each of the pair of longitudinal bulkheads 50A and 50B is divided into a plurality of sections in the fore-and-aft direction FA by a plurality of side bulkheads 30A and 30B. Specifically, one longitudinal bulkhead 50A in the ship's breadth direction Dw includes a first longitudinal bulkhead 51A, a second longitudinal bulkhead 52A, a third longitudinal bulkhead 53A, and a fourth longitudinal bulkhead 54A. The first longitudinal bulkhead 51A is provided between the third rear transverse bulkhead 23 and the first side bulkhead 31A in the fore-and-aft direction FA and forms part of the first side chamber 101A. The second longitudinal bulkhead 52A is provided between the first side bulkhead 31A and the second side bulkhead 32A in the fore-and-aft direction FA and forms part of the second side chamber 102A. The third longitudinal bulkhead 53A is provided between the second side bulkhead 32A and the third side bulkhead 33A in the fore-and-aft direction FA and forms part of the third side chamber 103A. The fourth longitudinal bulkhead 54A is provided between the third side bulkhead 33A and the fourth side bulkhead 34A in the fore-and-aft direction FA and forms part of the fourth side chamber 104A.

[0025] Similarly, the other longitudinal bulkhead 50B in the ship width direction Dw includes a first longitudinal bulkhead 51B, a second longitudinal bulkhead 52B, a third longitudinal bulkhead 53B, and a fourth longitudinal bulkhead 54B. The first longitudinal bulkhead 51B is provided between the third rear transverse bulkhead 23 and the first side bulkhead 31B in the fore-and-aft direction FA of the ship, and forms a part of the first side compartment 101B. The second longitudinal bulkhead 52B is provided between the first side bulkhead 31B and the second side bulkhead 32B in the fore-and-aft direction FA of the ship, and forms a part of the second side compartment 102B. The third longitudinal bulkhead 53B is provided between the second side bulkhead 32B and the third side bulkhead 33B in the fore-and-aft direction FA of the ship, and forms a part of the third side compartment 103B. The fourth longitudinal bulkhead 54B is provided between the third side bulkhead 33B and the fourth side bulkhead 34B in the fore-and-aft direction FA of the ship, and forms a part of the fourth side compartment 104B.

[0026] As shown in FIGS. 4 and 5, the double-bottom space X is formed by the above-described outer bottom plate 9, inner bottom deck 6, and a pair of longitudinal bulkheads 50A and 50B. The double-bottom space X is formed by being surrounded by the outer bottom plate 9, the inner bottom deck 6, and a pair of longitudinal bulkheads 50A and 50B. The double-bottom space X extends in the fore-and-aft direction FA between the outer bottom plate 9, the inner bottom deck 6, and a pair of longitudinal bulkheads 50A and 50B.

[0027] As shown in FIGS. 3 and 4, among the first longitudinal bulkheads 51A and 51B, the lower bulkheads 51Ab and 51Bb below the bottom deck 61 have a non-watertight structure. Here, the non-watertight structure means a structure in which holes, slits (not shown), etc. are formed in the bulkhead, enabling the movement of water or the like from one space in the thickness direction of the bulkhead to the other space. Thereby, in each of the first side compartments 101A and 101B, the space 101s below the bottom deck 63 communicates with the double-bottom space X.

[0028] Also, as shown in FIGS. 3 and 5, among the third longitudinal bulkheads 53A and 53B, the lower bulkheads 53Ab and 53Bb below the bottom deck 63 have a non-watertight structure. Thereby, in each of the third side compartments 103A and 103B, the space 103s below the bottom deck 63 communicates with the double-bottom space X.

[0029] The transverse watertight bulkhead 40 is provided on the bow 2a side in the fore-and-aft direction FA of the ship, ahead of the third rear transverse bulkhead 23. In the present embodiment, a plurality of transverse watertight bulkheads 40 are provided at intervals in the fore-and-aft direction FA of the ship. Each transverse watertight bulkhead 40 extends in the ship's width direction Dw and is connected to the longitudinal through bulkhead 50A and the longitudinal through bulkhead 50B. Each transverse watertight bulkhead 40 rises from the upper surface of the outer bottom plate 9, extends upward, and is connected to the lower surface of the inner bottom deck 6. Each transverse watertight bulkhead 40 divides the double-bottom space X in the fore-and-aft direction FA of the ship, forming a plurality of double-bottom compartments S.

[0030] As shown in FIG. 3, in the present embodiment, the plurality of transverse watertight bulkheads 40 are provided in the order of the first transverse watertight bulkhead 41, the second transverse watertight bulkhead 42, the third transverse watertight bulkhead 43, and the fourth transverse watertight bulkhead 44 from the stern 2b side to the bow 2a side in the fore-and-aft direction FA of the ship. The first transverse watertight bulkhead 41 is provided at a distance from the third rear transverse bulkhead 23 on the bow 2a side in the fore-and-aft direction FA of the ship. The second transverse watertight bulkhead 42 is provided at a distance from the first transverse watertight bulkhead 41 on the bow 2a side in the fore-and-aft direction FA of the ship. The third transverse watertight bulkhead 43 is provided at a distance from the second transverse watertight bulkhead 42 on the bow 2a side in the fore-and-aft direction FA of the ship. The fourth transverse watertight bulkhead 44 is provided at a distance from the third transverse watertight bulkhead 43 on the bow 2a side in the fore-and-aft direction FA of the ship.

[0031] The first transverse watertight bulkhead 41 in the present embodiment is provided at the same position as the above-described first side bulkheads 31A and 31B in the fore-and-aft direction FA of the ship. Similarly, the second transverse watertight bulkhead 42 is provided at the same position as the second side bulkheads 32A and 32B in the fore-and-aft direction FA of the ship. The third transverse watertight bulkhead 43 is provided at the same position as the third side bulkheads 33A and 33B in the fore-and-aft direction FA of the ship. The fourth transverse watertight bulkhead 44 is provided at the same position as the fourth side bulkheads 34A and 34B in the fore-and-aft direction FA of the ship.

[0032] The double-bottom space X is partitioned into a plurality of double-bottom compartments S in the fore-and-aft direction FA by the first transverse watertight bulkhead 41, the second transverse watertight bulkhead 42, the third transverse watertight bulkhead 43, and the fourth transverse watertight bulkhead 44. In the present embodiment, as an example of the plurality of double-bottom compartments S, a case where the first double-bottom compartment S1, the second double-bottom compartment S2, the third double-bottom compartment S3, and the fourth double-bottom compartment S4 are formed is illustrated.

[0033] The first double-bottom compartment S1 is formed between the third rear transverse bulkhead 23 and the first transverse watertight bulkhead 41. The second double-bottom compartment S2 is formed between the first transverse watertight bulkhead 41 and the second transverse watertight bulkhead 42. The third double-bottom compartment S3 is formed between the second transverse watertight bulkhead 42 and the third transverse watertight bulkhead 43. The fourth double-bottom space S4 is formed between the third transverse watertight bulkhead 43 and the fourth transverse watertight bulkhead 44.

[0034] Also, in the present embodiment, on the bow 2a side, which is on the opposite side of the generator room R2 in the fore-and-aft direction FA across the third rear transverse bulkhead 23, an auxiliary machinery room R3 (see FIG. 4) is provided. The auxiliary machinery room R3 of the present embodiment is formed so as to extend between the longitudinal partition 50A and the longitudinal partition 50B along the third rear transverse bulkhead 23. On the bow 2a side of the auxiliary machinery room R3 in the hierarchy on the inner bottom deck 6, for example, a void (not shown) or the like is provided.

[0035] As shown in FIGS. 3 and 4, a first ballast tank T1 is formed in a double-bottom space X below the inner bottom deck 6, which is lower than the auxiliary machinery room R3. The first ballast tank T1 is formed and surrounded by a rear wall 81, a front wall 82, and a pair of side walls 83A and 83B as shown in FIG. 3. The rear wall 81 in the present embodiment is a part of the third rear transverse partition wall 23, and the third rear transverse partition wall 23 also serves as the rear wall 81. The front wall 82 is provided at a distance from the rear wall 81 on the bow 2a side in the fore-and-aft direction FA. The pair of side walls 83A and 83B extend in the fore-and-aft direction FA and are provided at intervals from each other in the ship width direction Dw. One side wall 83A in the ship width direction Dw is provided at a distance from one longitudinal through partition wall 50A on the inner side in the ship width direction Dw. The other side wall 83B in the ship width direction Dw is provided at a distance from the other longitudinal through partition wall 50B on the inner side in the ship width direction Dw. Each of the pair of side walls 83A and 83B extends in the fore-and-aft direction FA, connects one end of the rear wall 81 in the ship width direction Dw to one end of the front wall 82 in the ship width direction Dw, and connects the other end of the rear wall 81 in the ship width direction Dw to the other end of the front wall 82 in the ship width direction Dw.

[0036] In the present embodiment, the first transverse watertight bulkhead 41 is provided at a position overlapping the first ballast tank T1 in the fore-and-aft direction FA. Therefore, the first transverse watertight bulkhead 41 is provided separately on one side and the other side in the ship width direction Dw with respect to the first ballast tank T1 in the double-bottom space X.

[0037] Also, in the present embodiment, in the double-bottom space X, a second ballast tank T2 is provided at a distance from the first ballast tank T1 on the bow 2a side in the fore-and-aft direction FA. The second ballast tank T2 is formed surrounded by a rear wall 91, a front wall 92, and a pair of side walls 93A and 93B. The front wall 92 is provided at a distance from the rear wall 91 on the bow 2a side in the fore-and-aft direction FA. The pair of side walls 93A and 93B are provided at intervals in the ship width direction Dw. One side wall 93A in the ship width direction Dw is provided at a distance from one longitudinal bulkhead 50A inside the ship width direction Dw. The other side wall 93B in the ship width direction Dw is provided at a distance from the other longitudinal bulkhead 50B inside the ship width direction Dw. The side wall 93A extends in the fore-and-aft direction FA and connects one end of the rear wall 91 in the ship width direction Dw and one end of the front wall 92 in the ship width direction Dw. The side wall 93B extends in the fore-and-aft direction FA and connects the other end of the rear wall 91 in the ship width direction Dw and the other end of the front wall 92 in the ship width direction Dw.

[0038] In the present embodiment, the fourth transverse watertight bulkhead 44 is provided at a position overlapping the second ballast tank T2 in the fore-and-aft direction FA. For this reason, the first transverse watertight bulkhead 41 is provided separately on both sides of the second ballast tank T2 in the ship width direction Dw in the double-bottom space X.

[0039] Each of a plurality of horizontally disposed watertight bulkheads 40 (the first horizontally disposed watertight bulkhead 41, the second horizontally disposed watertight bulkhead 42, the third horizontally disposed watertight bulkhead 43, and the fourth horizontally disposed watertight bulkhead 44) is provided with an opening / closing part 70. The opening / closing part 70 switches the communication / non-communication state between double-bottom compartments S adjacent to each other in the fore-and-aft direction FA with the horizontally disposed watertight bulkhead 40 interposed therebetween. As the opening / closing part 70, an opening / closing hatch, for example, a transversely sliding hatch can be exemplified. Here, when the opening / closing part 70 is constituted by a transversely sliding hatch, among the double-bottom compartments S adjacent to each other in the fore-and-aft direction FA with the horizontally disposed watertight bulkhead 40 interposed therebetween, the opening / closing part 70 that opens by the water pressure from the double-bottom compartment S on the stern 2b side in the fore-and-aft direction FA and the opening / closing part 70 that opens by the water pressure from the double-bottom compartment S on the bow 2a side in the fore-and-aft direction FA may both be provided in the horizontally disposed watertight bulkhead 40. As the opening / closing part 70, alternatively, a pipe penetrating the horizontally disposed watertight bulkhead 40 in the fore-and-aft direction FA and a valve for closing the inside of the pipe in an opening / closing manner may be used. Each opening / closing part 70 of the present embodiment is configured such that the opening / closing operation is performed by remote operation of an operator.

[0040] In such a ship 1A, for example, when the side shell 3A is damaged and seawater enters the first side compartment 101A, as shown in FIG. 4, the seawater flows from the space 101s below the bottom deck 61 into the first double-bottom compartment S1 through the lower partition 51Ab having a non-watertight structure. Further, for example, when the damage to the side shell 3A extends not only to the first side compartment 101A but also to the second side compartment 102A, if necessary, by opening the opening / closing part 70 of the first horizontally disposed watertight bulkhead 41, the seawater in the first double-bottom compartment S1 can be made to flow into the second double-bottom compartment S2. In addition, when the side hull 3A is damaged and, for example, seawater enters the third side compartment 103A, as shown in FIG. 5, the seawater flows from the space 103s below the bottom deck 63 into the third double-bottom section S3 through the lower partition 53Ab of the non-watertight structure. Further, for example, when the damage to the side hull 3A extends not only to the third side compartment 103A but also to the second side compartment 102A and the fourth side compartment 104A, etc., if necessary, as shown in FIG. 3, when the opening / closing parts 70 of the second transverse watertight bulkhead 42 and the fourth transverse watertight bulkhead 44 are opened, the seawater in the third double-bottom section S3 can be made to flow into the second double-bottom section S2 and the fourth double-bottom section S4. Here, the case where the side hull 3A is damaged has been exemplified, but the same can be said for the damage site being the side hull 3B as well.

[0041] (Function and Effect) In the ship 1A of the above-described embodiment, the opening / closing part 70 is provided in the transverse watertight bulkhead 40 that forms a plurality of double-bottom sections S in the double-bottom space X. When the hull 2 is damaged and seawater enters the double-bottom space X, depending on the situation, the opening / closing part 70 can switch the communication / non-communication state between the double-bottom sections S. Thereby, the seawater flowing into the double-bottom space X can be appropriately controlled, and the recoverability of the ship 1A can be ensured.

[0042] Also, in the above-described embodiment, since a plurality of transverse watertight bulkheads 40 are provided at intervals in the fore-and-aft direction FA of the ship, the double-bottom space X is partitioned into more double-bottom sections S (S1 to S4). Thereby, it becomes easier to more appropriately control the seawater flowing into the double-bottom space X.

[0043] In the above-described embodiment, a plurality of side chambers 100 are provided on both sides in the ship width direction Dw, and the longitudinal partition walls 50A and 50B communicate the double bottom space X with at least one of the plurality of side chambers 100. Therefore, when the ship sides 3A and 3B are damaged and seawater enters the side chamber 100 communicating with the double bottom space X through the longitudinal partition walls 50A and 50B, the seawater flows from the side chamber 100 into the double bottom space X through the longitudinal partition walls 50A and 50B. Further, when the ship sides 3A and 3B are damaged across the side chambers 100 (first side chambers 101A, 101B, third side chambers 103A, 103B) communicating with the double bottom space X and other side chambers 100 adjacent to this side chamber 100, the seawater that has entered the other side chambers 100 (second side chambers 102A, 102B, fourth side chambers 104A, 104B) flows into the double bottom space X through the side chambers 100 (first side chambers 101A, 101B, third side chambers 103A, 103B) communicating with the double bottom space X. The seawater that has flowed into the double bottom space X in this way is appropriately controlled by switching the communication / non-communication state between the double bottom compartments S by the opening / closing part 70 formed in the horizontal watertight partition wall 40.

[0044] <Second Embodiment> Next, a second embodiment of the ship according to the present disclosure will be described. In the second embodiment described below, only the configuration including the duct is different from the first embodiment, so the same reference numerals are given to the same parts as in the first embodiment and the description thereof will be given, and redundant description will be omitted. FIG. 6 is a plan sectional view of the double bottom space of the ship according to the second embodiment of the present disclosure. As shown in FIG. 6, in the hull 2 of the ship 1B of this embodiment, in addition to the configuration shown in the above-described first embodiment, a duct 200 is provided in the double bottom space X. In this second embodiment, a plurality of ducts 200 are provided at intervals in the fore-and-aft direction FA of the ship. Each duct 200 communicates a side chamber 100A on one side in the ship width direction Dw with a side chamber 100B on the other side in the ship width direction Dw. In this second embodiment, as the plurality of ducts 200, a first duct 201 and a second duct 202 are provided.

[0045] The first duct 201 is provided to communicate the first side compartment 101A on one side in the ship width direction Dw and the first side compartment 101B on the other side in the ship width direction Dw. The first duct 201 has a first duct wall 201w. The first duct wall 201w is provided at a distance from the third rear horizontal partition wall 23 on the bow 2a side in the ship's head and stern direction FA. The first duct wall 201w extends in the ship width direction Dw, one end thereof is connected to the vertical through partition wall 50A, and the other end is connected to the vertical through partition wall 50B. The first duct wall 201w rises upward from the upper surface of the outer bottom plate 9 of the ship and is connected to the lower surface of the inner bottom deck 6. The first duct 201 extends in the ship width direction Dw by being surrounded by the third rear horizontal partition wall 23 and the first duct wall 201w between the outer bottom plate 9 of the ship and the inner bottom deck 6. At both ends of the first duct 201 in the ship width direction Dw, a duct opening 203 is formed in each of the vertical through partition walls 50A and 50B. The duct opening 203 is formed to penetrate each of the vertical through partition walls 50A and 50B in the ship width direction Dw.

[0046] The second duct 202 is provided to communicate the third side compartment 103A on one side in the ship width direction Dw and the third side compartment 103B on the other side in the ship width direction Dw. The second duct 202 has a second duct wall 202w. The second duct wall 202w is provided at a distance from the third horizontal watertight partition wall 43 on the stern 2b side in the ship's head and stern direction FA. The second duct wall 202w extends in the ship width direction Dw, and both ends thereof are connected to a pair of vertical through partition walls 50A and 50B. The second duct wall 202w rises upward from the upper surface of the outer bottom plate 9 of the ship and is connected to the lower surface of the inner bottom deck 6. The second duct 202 extends in the ship width direction Dw by being surrounded by the third horizontal watertight partition wall 43 and the second duct wall 202w between the outer bottom plate 9 of the ship and the inner bottom deck 6. At both ends of the second duct 202 in the ship width direction Dw, a duct opening 204 is formed in each of the vertical through partition walls 50A and 50B. The duct opening 204 is formed to penetrate each of the vertical through partition walls 50A and 50B in the ship width direction Dw.

[0047] Each of the second duct wall 202w forming the second duct 202 and the third transverse watertight bulkhead 43 is provided with a duct opening / closing part 210. The duct opening / closing part 210 switches between a communicating and a non-communicating state between the inside of the second duct 202 (duct 200) and the double-bottom space X adjacent to the second duct 202. The duct opening / closing part 210 provided in the second duct wall 202w switches between a communicating and a non-communicating state between the inside of the second duct 202 and the third double-bottom section S3. The duct opening / closing part 210 provided in the third transverse watertight bulkhead 43 switches between a communicating and a non-communicating state between the inside of the second duct 202 and the fourth double-bottom section S4. Examples of the duct opening / closing part 210 include an openable / closable hatch, for example, a transflating hatch. As the duct opening / closing part 210, alternatively, a pipe penetrating the second duct wall 202w and the third transverse watertight bulkhead 43 in the fore-and-aft direction FA and a valve for closing the inside of the pipe in an openable / closable manner may be used. Each duct opening / closing part 210 is configured such that an opening / closing operation is performed by remote operation of an operator.

[0048] In such a ship 1B, for example, when the side shell 3A is damaged and seawater enters the first side compartment 101A, the seawater flows into the first duct 201 through the duct opening 203. The seawater that has flowed into the first duct 201 flows into the other first side compartment 101B in the ship width direction Dw through the duct opening 203. Thereby, balance in the ship width direction Dw can be achieved, and the transverse inclination of the hull 2 can be suppressed. Also, when the side shell 3A is damaged and, for example, seawater enters the third side compartment 103A, the seawater flows into the second duct 202 through the duct opening 204. The seawater that has flowed into the second duct 202 flows into the other third side compartment 103B in the ship width direction Dw through the duct opening 203. Further, if necessary, by opening the duct opening / closing part 210 provided in the second duct 202, the seawater in the second duct 202 flows into the third double-bottom section S3 and the fourth double-bottom section S4. Here, the case where damage occurs in the side shell 3A has been illustrated, but the same can be said for the damaged part being the side shell 3B.

[0049] (Function and effect) In the ship 1B of the above embodiment, ducts 200 (first duct 201, second duct 202) are provided to communicate a side chamber 100A (first side chamber 101A, third side chamber 103A) on one side in the ship width direction Dw and a side chamber 100B (first side chamber 101B, third side chamber 103B) on the other side in the ship width direction Dw. Thereby, when seawater intrudes into the side chamber 100A on either side in the ship width direction Dw, the seawater can be guided to the side chamber 100B on the other side through the duct 200. Thereby, the imbalance in the ship width direction Dw can be improved. Further, since the duct opening / closing part 210 is provided, by opening the duct opening / closing part 210, seawater can be exchanged between the duct 200 and the double bottom space X adjacent to the duct 200. In this way, the seawater flowing into the double bottom space X can be appropriately controlled, and the descent of the center of gravity of the ship 1B downward and the mitigation of the list can be achieved. As a result, the recoverability of the ship 1B can be enhanced.

[0050] Also, in the above embodiment, similar to the first embodiment, an opening / closing part 70 is provided in the horizontal watertight bulkhead 40 that forms a plurality of double bottom compartments S in the double bottom space X. When the hull 2 is damaged and seawater intrudes into the double bottom space X, the communication / non-communication state between the double bottom compartments S can be switched by the opening / closing part 70 according to the situation. Thereby, the seawater flowing into the double bottom space X can be appropriately controlled, and the recoverability of the ship can be ensured.

[0051] Also, in the above embodiment, a plurality of horizontal watertight bulkheads 40 are provided at intervals in the fore-and-aft direction FA of the ship, so that the double bottom space X is partitioned into more double bottom compartments S. Thereby, it becomes easier to more appropriately control the seawater flowing into the double bottom space X.

[0052] Further, in the above-described embodiment, a plurality of side chambers 100 are provided on both sides in the ship width direction Dw, and the longitudinal partition walls 50A and 50B communicate the double bottom space X with at least one of the plurality of side chambers 100. Therefore, when the ship sides 3A and 3B are damaged and seawater enters the side chamber 100 that communicates with the double bottom space X through the longitudinal partition walls 50A and 50B, the seawater flows from the side chamber 100 into the double bottom space X. The seawater that has flowed into the double bottom space X in this way is appropriately controlled by switching the communication / non-communication state between the double bottom compartments S by the opening / closing part 70 formed in the horizontal watertight partition wall 40.

[0053] (First Modification Example of the Second Embodiment) FIG. 7 is a plan sectional view of the double bottom space of a ship according to a first modification example of the second embodiment of the present disclosure. In the above-described second embodiment, the duct opening / closing part 210 is provided in each of the second duct wall 202w forming the second duct 202 and the third horizontal watertight partition wall 43, while the first duct wall 201w forming the first duct 201 is configured not to include the duct opening / closing part 210, but the present invention is not limited to this. For example, as shown in FIG. 7, when the lower partition walls 51Ab and 51Bb below the bottom deck 61 are made watertight, the duct opening / closing part 210 may be provided in the first duct wall 201w forming the first duct 201. The duct opening / closing part 210 provided in the first duct wall 201w switches the communication / non-communication state between the inside of the first duct 201 (duct 200) and the first double bottom compartment S1 (double bottom space X) adjacent to the first duct 201.

[0054] According to the first modification example of the second embodiment, for example, when seawater intrudes into the first side compartment 101A, if the duct opening / closing part 210 of the first duct 201 is closed, the intruded seawater will flow into the first side compartments 101A, 101B and the first duct 201. On the contrary, when the duct opening / closing part 210 of the first duct 201 is opened, the seawater intruded into the first side compartment 101A will flow into the first side compartments 101A, 101B, the first duct 201, and the first double bottom section S1. That is, by providing the duct opening / closing part 210 in the first duct 201 as in the first modification example of the second embodiment, it becomes possible to control the amount of water intrusion and the water intrusion area.

[0055] (Second modification example of the second embodiment) FIG. 8 is a plan sectional view of the double bottom space of a ship according to a second modification example of the second embodiment of the present disclosure. In the above first and second embodiments, the transverse watertight bulkhead 40 is provided with the first transverse watertight bulkhead 41, the second transverse watertight bulkhead 42, the third transverse watertight bulkhead 43, and the fourth transverse watertight bulkhead 44, but it is not limited thereto. For example, as shown in FIG. 8, the ship 1C in the second modification example of the second embodiment does not include the first transverse watertight bulkhead 41 and the second transverse watertight bulkhead 42 in the above first and second embodiments, and only includes the third transverse watertight bulkhead 43 and the fourth transverse watertight bulkhead 44. Thereby, the double bottom space X includes a first double bottom section S11 formed between the first duct 201 and the second duct 202, and a second double bottom section S12 formed between the third double bottom section S3 and the fourth double bottom section S4.

[0056] The duct opening / closing part 210 is provided in the first duct wall 201w that forms the first duct 201. Further, the duct opening / closing part 210 is provided in each of the second duct wall 202w that forms the second duct 202 and the third horizontally arranged watertight bulkhead 43. The duct opening / closing part 210 provided in the first duct wall 201w switches the communication / non-communication state between the inside of the first duct 201 (duct 200) and the first double-bottom section S11. The duct opening / closing part 210 provided in the second duct wall 202w switches the communication / non-communication state between the inside of the second duct 202 and the first double-bottom section S11. The duct opening / closing part 210 provided in the third horizontally arranged watertight bulkhead 43 switches the communication / non-communication state between the inside of the second duct 202 and the second double-bottom section S12.

[0057] (Other Embodiments) As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included. In the above embodiment, the first horizontally arranged watertight bulkhead 41, the second horizontally arranged watertight bulkhead 42, the third horizontally arranged watertight bulkhead 43, and the fourth horizontally arranged watertight bulkhead 44 are provided at the same positions as the first side bulkheads 31A, 31B, the second side bulkheads 32A, 32B, the third side bulkheads 33A, 33B, and the fourth side bulkheads 34A, 34B. However, the present disclosure is not limited to this. The first horizontally arranged watertight bulkhead 41, the second horizontally arranged watertight bulkhead 42, the third horizontally arranged watertight bulkhead 43, and the fourth horizontally arranged watertight bulkhead 44 may be provided at positions different in the fore-and-aft direction FA of the ship with respect to the first side bulkheads 31A, 31B, the second side bulkheads 32A, 32B, the third side bulkheads 33A, 33B, and the fourth side bulkheads 34A, 34B.

[0058] <Supplementary Note> The ships 1A to 1C described in each embodiment are understood as follows, for example.

[0059] (1) The ships 1A to 1C according to the first aspect include a hull 2 having a pair of side plates 3A and 3B and a bottom 4. The hull 2 includes an outer bottom plate 9 forming the bottom 4, an inner bottom deck 6 provided above the outer bottom plate 9, a pair of longitudinal watertight bulkheads 50A and 50B provided inside the ship's breadth direction Dw with respect to the pair of side plates 3A and 3B and extending in the fore-and-aft direction FA, and a transverse watertight bulkhead 40 that forms a plurality of double-bottom compartments S by partitioning a double-bottom space X formed between the outer bottom plate 9, the inner bottom deck 6, and the pair of longitudinal watertight bulkheads 50A and 50B in the fore-and-aft direction FA, and an opening / closing part 70 provided on the transverse watertight bulkhead 40 for switching the communication / non-communication state between the double-bottom compartments S.

[0060] In these ships 1A to 1C, the transverse watertight bulkhead 40 that forms a plurality of double-bottom compartments S in the double-bottom space X is provided with the opening / closing part 70. When the hull 2 is damaged and seawater enters the double-bottom space X, the communication / non-communication state between the double-bottom compartments S can be switched by the opening / closing part 70 according to the situation. Thereby, the seawater flowing into the double-bottom space X can be appropriately controlled, and the recoverability of the ship can be ensured.

[0061] (2) The ships 1A to 1C according to the second aspect are the ships 1A to 1C of (1), wherein a plurality of the transverse watertight bulkheads 40 are provided at intervals in the fore-and-aft direction FA.

[0062] Thereby, since a plurality of the transverse watertight bulkheads 40 are provided at intervals in the fore-and-aft direction FA, the double-bottom space X is partitioned into more double-bottom compartments S. Thereby, it becomes easier to appropriately control the seawater flowing into the double-bottom space X.

[0063] (3) The ships 1A and 1B according to the third aspect are the ships 1A and 1B of (1) or (2), and are formed between the side hulls 3A and 3B, the longitudinal bulkheads 50A and 50B, and a plurality of side bulkheads 30A and 30B that are provided at intervals in the fore-and-aft direction FA and close the space between the side hulls 3A and 3B and the longitudinal bulkheads 50A and 50B. The ships are provided with a plurality of side rooms 100 respectively provided on both sides in the ship width direction Dw. The longitudinal bulkheads 50A and 50B communicate the double bottom space X with at least one of the plurality of side rooms 100.

[0064] As a result, a plurality of side rooms 100 are respectively provided on both sides in the ship width direction Dw, and the longitudinal bulkheads 50A and 50B communicate the double bottom space X with at least one of the plurality of side rooms 100. Therefore, when the side hulls 3A and 3B are damaged and seawater enters the side room 100 that communicates with the double bottom space X through the longitudinal bulkheads 50A and 50B, the seawater flows from the side room 100 into the double bottom space X. Further, when the side hulls 3A and 3B are damaged across the side room 100 that communicates with the double bottom space X and another side room 100 adjacent to this side room 100, the seawater that has entered the other side room 100 flows into the double bottom space X through the side room 100 that communicates with the double bottom space X. The seawater that has flowed into the double bottom space X in this way can be appropriately controlled by switching the communication / non-communication state between the double bottom compartments S by the opening / closing part 70 formed in the horizontal watertight bulkhead 40.

[0065] (4) The ships 1B and 1C according to the fourth aspect are the ships 1B and 1C of any one of (1) to (3), and are formed between the side hulls 3A and 3B, the longitudinal bulkheads 50A and 50B, and a plurality of side bulkheads 30A and 30B that are provided at intervals in the fore-and-aft direction FA and close the space between the side hulls 3A and 3B and the longitudinal bulkheads 50A and 50B. The ships are provided with a plurality of side rooms 100 respectively provided on both sides in the ship width direction Dw, a duct 200 provided in the double bottom space X and communicating the side room 100 on one side in the ship width direction Dw with the side room 100 on the other side in the ship width direction Dw, and a duct opening / closing part 210 that switches the communication / non-communication state between the inside of the duct 200 and the double bottom space X.

[0066] Thus, since the duct 200 that communicates the side compartment 100 on one side in the ship width direction Dw and the side compartment 100 on the other side in the ship width direction Dw is provided, when seawater enters the side compartment 100 on either one side in the ship width direction Dw, the seawater can be guided to the side compartment 100 on the other side through the duct 200. Thereby, the imbalance in the ship width direction Dw can be improved. Further, since the duct 200 is provided with the duct opening / closing part 210, by opening the duct opening / closing part 210, seawater can be exchanged between the duct 200 and the double bottom space X adjacent to the duct 200. In this way, the seawater flowing into the double bottom space X can be appropriately controlled.

Explanation of reference signs

[0067] 1A~1C…Ship 2…Hull 2a…Bow 2b…Stern 3A, 3B…Side 4…Bottom 5…Freeboard deck 6…Inner bottom deck 7…Deck 8…Upper deck 9…Bottom shell plating 15…Superstructure 21…First rear transverse bulkhead 22…Second rear transverse bulkhead 23…Third rear transverse bulkhead 30A, 30B…Side bulkhead 31A, 31B…First side bulkhead 32A, 32B…Second side bulkhead 33A, 33B…Third side bulkhead 34A, 34B…Fourth side bulkhead 35A, 35B…Fifth side bulkhead 40…Transverse watertight bulkhead 41…First transverse watertight bulkhead 42…Second transverse watertight bulkhead 43…Third transverse watertight bulkhead 44…Fourth transverse watertight bulkhead 50A, 50B…Longitudinal through bulkhead 51A, 51B…First longitudinal through bulkhead 51Ab, 51Bb…Lower bulkhead 52A, 52B…Second longitudinal through bulkhead 53A, 53B…Third longitudinal through bulkhead 53Ab, 53Bb…Lower bulkhead 54A, 54B…Fourth longitudinal through bulkhead 61, 63…Bottom deck 70…Opening / closing part 81, 91…Rear wall 82, 92…Front wall 83A, 83B, 93A, 93B…Side wall 100, 100A, 100B…Side compartment 101A, 101B…First side compartment 101s…Void space 102A, 102B…Second side compartment 103A, 103B…Third side compartment 103s…Void space 104A, 104B…Fourth side compartment 105A, 105B…Fifth side compartment 106A, 106B…Sixth side compartment 200…Duct 201…First duct 201w…First duct wall 202…Second duct 202w…Second duct wall 203, 204…Duct opening 210…Duct opening / closing part R1…Main engine room R2…Generator room R3…Auxiliary machinery room S…Double bottom compartment S1, S11…First double bottom compartment S2, S12…Second double bottom compartment S3…Third double bottom compartment S4…Fourth double bottom compartment T1…First ballast tank T2…Second ballast tank X…Double bottom space

Claims

1. A ship having a hull with a pair of side hulls and a bottom hull, wherein the hull comprises: an outer bottom plate forming the bottom hull; an inner bottom deck provided above the outer bottom plate; a pair of longitudinal bulkheads provided on the inner side in the ship's breadth direction with respect to the pair of side hulls and extending in the fore-and-aft direction; a transverse watertight bulkhead that forms a plurality of double-bottom compartments by partitioning the double-bottom space formed between the outer bottom plate, the inner bottom deck, and the pair of longitudinal bulkheads in the fore-and-aft direction; an opening / closing part provided on the transverse watertight bulkhead for switching the communication / non-communication state between the double-bottom compartments; and a ship comprising the above.

2. The ship according to Claim 1, wherein a plurality of the transverse watertight bulkheads are provided at intervals in the fore-and-aft direction. The ship according to Claim 1.

3. The ship further comprises a plurality of side compartments provided on both sides in the ship's breadth direction, which are formed between the side hulls, the longitudinal bulkheads, and a plurality of side bulkheads provided at intervals in the fore-and-aft direction for closing the space between the side hulls and the longitudinal bulkheads, wherein the longitudinal bulkhead communicates with at least one of the double-bottom space and the plurality of side compartments. The ship according to Claim 1 or 2.

4. a plurality of side compartments provided on each of both sides in the ship's breadth direction, which are formed between the side hulls, the longitudinal bulkheads, and a plurality of side bulkheads provided at intervals in the fore-and-aft direction for closing the space between the side hulls and the longitudinal bulkheads; a duct provided in the double-bottom space for communicating the side compartment on one side in the ship's breadth direction with the side compartment on the other side in the ship's breadth direction; and a duct opening / closing part for switching the communication / non-communication state between the inside of the duct and the double-bottom space. The ship according to Claim 1 or 2.

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