JP7406942B2 - ship - Google Patents

Description

TECHNICAL FIELD This disclosure relates to ships.

Patent Document 1 discloses a configuration in which a water-reducing watertight compartment that contacts a side wall or a bulkhead is provided inside a room formed by partitioning the interior of the hull in the longitudinal direction of the hull by bulkheads. . With such a configuration, in the event of flooding, the flooded water can be kept in the flood suppression watertight compartment and the spread of the flooded area can be suppressed.

JP2014-223913A

However, it is desirable to ensure the buoyancy of the ship even in cases where water intrudes outside the watertight compartment.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a ship that can ensure the buoyancy of the ship in the event of flooding.

In order to solve the above problems, a ship according to the present disclosure includes a hull, a bulkhead, and a submerged buoyancy room. The hull has a pair of sides and a bottom. The bulkhead forms a machinery area by dividing the inside of the hull in a bow-stern direction. The flooded buoyancy room is formed as a watertight compartment that does not partition the machinery area in the width direction, at a position spaced apart from the pair of sides of the engine room toward the center in the width direction of the ship. The vessel further includes a communication portion that communicates a first side and a second side in the ship width direction with respect to the flooded buoyancy room within the machinery area. The flooded buoyancy room is provided spaced apart from each of the bulkheads in the bow and aft direction, and at least the main engine is housed inside the flooded buoyancy room .

According to the ship of the present disclosure, the buoyancy of the ship can be ensured even when flooding occurs.

FIG. 1 is a side view of a ship according to an embodiment of the present disclosure. FIG. 1 is a plan cross-sectional view showing a machinery area of a ship according to a first embodiment of the present disclosure. FIG. 3 is a plan cross-sectional view showing a machinery area of a ship according to a second embodiment of the present disclosure. FIG. 7 is a plan cross-sectional view showing a machinery area of a ship according to a modification of the second embodiment of the present disclosure. FIG. 3 is a plan cross-sectional view showing a machinery area of a ship according to a third embodiment of the present disclosure. FIG. 7 is a plan cross-sectional view showing a machinery area of a ship according to a modification of the third embodiment of the present disclosure. FIG. 7 is a plan cross-sectional view showing a submerged buoyancy room provided in a ship according to another modification of the embodiment of the present disclosure. FIG. 7 is a plan cross-sectional view showing an upper submerged buoyancy room provided in a ship according to another modification of the embodiment of the present disclosure.

<First embodiment>
(Ship configuration)
Hereinafter, a ship according to an embodiment of the present disclosure will be described with reference to FIGS. 1 and 2.
As shown in FIGS. 1 and 2, the ship 1 of this embodiment includes a hull 2, bulkheads 12 and 13, and submerged buoyancy rooms 31 and 32. The type of ship 1 is not limited to a specific type. Examples of the type of ship 1 include a ferry, a RORO ship (Roll-on/Roll-off ship), and a PCTC (Pure Car & Truck Carrier).

(hull configuration)
The hull 2 has a pair of sides 3A and 3B forming its outer shell, and a bottom 4. The sides 3A and 3B have a pair of side skins forming port and starboard sides, respectively. The bottom 4 has a bottom shell plate that connects these sides 3A and 3B. The pair of sides 3A, 3B and the bottom 4 form the outer shell of the hull 2 into a U-shape in a cross section perpendicular to the bow and stern direction FA.

The hull 2 has multiple deck layers inside thereof, including a freeboard deck 5, an upper deck 6, and an upper deck 8. The freeboard deck 5 in this embodiment is a full-through deck arranged at the lowest level among all-through decks arranged above the load waterline. The upper deck 6 is a full deck located one layer above the freeboard deck 5. The upper deck 8 is a full deck located at the top of the full decks. The hull 2 illustrated in this embodiment further includes a deck 7 below the freeboard deck 5.

The ship 1 includes a bow bulkhead 19A and a stern bulkhead 19B within the hull 2. The bow bulkhead 19A is provided at the bow portion 2a of the hull 2. The bow bulkhead 19A is provided between the upper deck 8 and the deck 7 so as to extend in the ship width direction W and close between the pair of sides 3A and 3B. The stern bulkhead 19B is provided at the stern portion 2b of the hull 2. The stern bulkhead 19B is provided between the freeboard deck 5 and the deck 7 so as to extend in the ship width direction W and close between the pair of sides 3A and 3B.

As shown in FIGS. 1 and 2, the hull 2 includes a rear bulkhead 11, a bulkhead 12, a bulkhead 13, and a front bulkhead 14 between the freeboard deck 5 and the deck 7. The rear bulkhead 11 and the bulkhead 12 are spaced apart from each other in the bow and aft direction FA. The bulkhead 12 and the bulkhead 13 are spaced apart from each other in the bow and aft direction FA. The bulkhead 13 and the front bulkhead 14 are spaced apart from each other in the bow and aft direction FA. The rear bulkhead 11, the bulkhead 12, the bulkhead 13, and the front bulkhead 14 each extend from the side 3A to the side 3B, and from the freeboard deck 5 to the deck 7, respectively. That is, the space between the freeboard deck 5 and the deck 7 is divided in the bow and aft direction by the rear bulkhead 11, bulkhead 12, bulkhead 13, and front bulkhead 14.

(Engine room configuration)
In this embodiment, the compartment between the freeboard deck 5 and the deck 7 and between the rear bulkhead 11 and the front bulkhead 14 is an engine room 10. The engine room 10 includes a main engine room 10A as an engine area A1, a generator room 10B, and a shaft room 10C.

The main engine room 10A is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, the bulkhead 12, and the bulkhead 13. That is, the bulkheads 12 and 13 form the main engine room 10A as the engine area A1 by dividing the interior of the hull 2 in the bow and aft direction FA. The generator room 10B is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, the bulkhead 13, and the front bulkhead 14. The shaft chamber 10C is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, the rear bulkhead 11, and the bulkhead 12. The main engine room 10A and the generator room 10B are adjacent to each other in the bow and aft direction FA. The main engine room 10A and the shaft room 10C are adjacent to each other in the bow and aft direction FA.

The ship 1 includes a main engine 21 and a generator engine 22 in an engine room 10 .
The main engine 21 is located within the main engine room 10A. The main engine 21 exerts a propulsive force that causes the ship 1 to sail. The main engine 21 rotates a screw 9 provided outside the stern portion 2 b of the hull 2 via a screw shaft 23 . The main engine 21 includes, for example, a gas turbine, a reciprocating engine, or the like. In the embodiment of the present disclosure, two main engines 21 are provided, for example, spaced apart in the ship width direction W.

The screw shaft 23 extends from the main engine 21 in the main engine room 10A toward the stern side in the bow-stern direction FA, penetrates the partition wall 12, and is disposed in the shaft room 10C. The screw shaft 23 passes through the rear bulkhead 11 from the shaft chamber 10C and extends outboard from the lower surface of the stern section 2b. A seal structure (not shown) for ensuring watertightness is provided in the rear partition wall 11 and the partition wall 12 at a portion through which the screw shaft 23 passes.

The generator engine 22 is arranged within the generator room 10B. The generator engine 22 drives a generator (not shown). The generator engine 22 includes, for example, a gas turbine or a reciprocating engine. The rotational energy generated by the generator engine 22 is converted into electrical energy by the generator and supplied to various parts within the hull 2 . In the embodiment of the present disclosure, for example, three generator engines 22 are provided spaced apart in the ship width direction W.

(Configuration of flooded buoyancy room)
As shown in FIG. 2, the submerged buoyancy rooms 31 and 32 are provided within the main engine room 10A. The flooded buoyancy rooms 31 and 32 are provided in the main engine room 10A at positions separated from the pair of sides 3A and 3B in the main engine room 10A toward the center in the ship width direction W. The flooded buoyancy rooms 31 and 32 are provided at intervals in the bow and aft direction FA. In this embodiment, the submerged buoyancy rooms 31 and 32 are arranged between the plurality of main engines 21 lined up in the ship width direction W.

The immersion buoyancy room 31 on the bow side in the bow/stern direction FA is provided in contact with the bulkhead 13. The flooded buoyancy room 31 includes side watertight walls 31a, 31b and a rear watertight wall 31c. The side watertight walls 31a and 31b extend parallel to each other between the freeboard deck 5 and the deck 7 from the bulkhead 13 toward the stern side in the bow and aft direction FA. The rear watertight wall 31c is arranged in parallel to the bulkhead 13 on the stern side in the bow/stern direction FA at an interval. The rear watertight wall 31c extends in the ship width direction W between the freeboard deck 5 and the deck 7, and connects the side watertight walls 31a and 31b. This submerged buoyancy room 31 is partially formed by the partition wall 13. The flooded buoyancy chamber 31 is formed into a rectangular cylindrical shape in plan view by the partition wall 13, side watertight walls 31a, 31b, and rear watertight wall 31c.

The immersion buoyancy room 32 on the stern side in the bow and stern direction FA is provided in contact with the bulkhead 12. The flooded buoyancy room 32 includes side watertight walls 32a, 32b and a front watertight wall 32c. The side watertight walls 32a, 32b are provided at positions spaced apart from the pair of sides 3A, 3B toward the center in the ship width direction W. The side watertight walls 32a and 32b extend parallel to each other between the freeboard deck 5 and the deck 7 from the bulkhead 12 toward the bow side in the bow and aft direction FA. The front watertight wall 32c is arranged parallel to the bulkhead 12 with an interval on the bow side in the bow and aft direction FA with respect to the bulkhead 12. The front watertight wall 32c is provided at a distance from the rear watertight wall 31c of the submerged buoyancy room 31 on the stern side in the bow/stern direction. The front watertight wall 32c extends in the ship width direction W between the freeboard deck 5 and the deck 7, and connects the side watertight walls 32a and 32b. This submerged buoyancy room 32 is partially formed by the partition wall 12. The flooded buoyancy chamber 32 is formed into a rectangular cylindrical shape in plan view by the partition wall 12, side watertight walls 32a, 32b, and front watertight wall 32c.
In this way, the submerged buoyancy rooms 31 and 32 are provided at intervals in the bow and aft direction FA.

(Configuration of communication part)
A communication portion 41 is formed between the rear watertight wall 31c of the flooded buoyancy room 31 and the front watertight wall 32c of the flooded buoyancy room 32. The communication part 41 is connected between the rear watertight wall 31c of the flooded buoyancy room 31 and the front watertight wall 32c of the flooded buoyancy room 32, which are provided at intervals in the bow and stern direction FA, and is connected to the main engine room 10A. A first side (the gunwale side 3A side in this embodiment) and a second side (the gunwale side 3B side in this embodiment) in the ship width direction W are communicated with the buoyancy rooms 31 and 32. Due to the communication portion 41, the submerged buoyancy rooms 31 and 32 are formed as watertight compartments that do not partition the main engine room 10A in the ship width direction W.

(effect)
In the ship 1 having the above configuration, the main engine room 10A is watertight at a position spaced apart from the pair of sides 3A and 3B to the center side in the ship width direction W in the main engine room 10A as the machinery area A1, and the main engine room 10A is not partitioned in the ship width direction W. It includes submerged buoyancy rooms 31 and 32 formed as sections. In the ship 1 of the embodiment described above, the submerged buoyancy rooms 31 and 32 are provided at positions spaced apart from the sides 3A and 3B toward the center in the ship width direction W.
Thereby, even if the sides 3A and 3B are damaged, the influence of the damage on the flooded buoyancy rooms 31 and 32 can be suppressed. Since the flooded buoyancy rooms 31 and 32 are watertight compartments, even when flooding occurs, water can be prevented from entering the interior of the flooded buoyancy rooms 31 and 32, and buoyancy is generated. Therefore, even when flooding occurs, the buoyancy of the ship 1 can be ensured.

Furthermore, by ensuring the buoyancy of the ship 1 when flooding occurs, it is possible to suppress the need to reduce the height of the center of gravity of the ship 1 by reducing the size of the upper structure and the like in order to improve stability when flooding occurs. This increases the degree of freedom in designing the layout of each part of the superstructure, such as living quarters. In addition, in order to improve stability in the event of flooding, there is no need to subdivide the watertight compartments in each part of the hull 2, which reduces the weight of steel materials, reduces the construction cost of the ship 1, and improves propulsion performance. etc. can also be achieved.

In the ship 1 of the above embodiment, a communication portion 41 is provided in the main engine room 10A to communicate the first side and the second side in the ship width direction W with respect to the submerged buoyancy rooms 31 and 32. Thereby, even if the flooded buoyancy rooms 31 and 32 are provided, the main engine room 10A is not partitioned in the ship width direction W. If water floods into the main engine room 10A from either the first side or the second side in the width direction of the ship, the water will flow through the communication part 41 to the first side of the main engine room 10A in the ship width direction, and It also flows into the other side of the second side. Thereby, the stability of the ship 1 can be improved.

In the ship 1 of the above embodiment, a part of the submerged buoyancy rooms 31 and 32 are formed by the partition walls 12 and 13. Thereby, the amount of steel materials required to form the flooded buoyancy rooms 31 and 32 can be suppressed, and costs can be reduced.

In the ship 1 of the above embodiment, the flooded buoyancy rooms 31 and 32 are formed below the freeboard deck 5. When water floods inside the main engine room 10A, the water does not flood inside the flooded buoyancy rooms 31 and 32, so the amount of water that floods below the freeboard deck 5 can be suppressed. Thereby, the effect of the buoyancy generated in the submerged buoyancy chambers 31 and 32 can be more efficiently exerted.

<Second embodiment>
Next, a second embodiment of the ship according to the present invention will be described. In the second embodiment described below, only the configuration of the submerged buoyancy room differs from the first embodiment, so the same parts as in the first embodiment will be described with the same reference numerals, and redundant explanation will be omitted.
(Ship configuration)
Hereinafter, a ship according to a second embodiment of the present disclosure will be described with reference to FIG. 3.
As shown in FIG. 3, the ship 1 includes a hull 2, bulkheads 12 and 13, and a submerged buoyancy room 33.

(Configuration of flooded buoyancy room)
The flooded buoyancy room 33 is provided in the main engine room 10A as the engine area A1. The flooded buoyancy room 33 is provided in the main engine room 10A at a position spaced apart from the pair of sides 3A and 3B in the main engine room 10A toward the center in the ship width direction W.

The flooded buoyancy chambers 33 are provided at intervals in the bow and aft direction FA with respect to each of the bulkheads 12 and 13. The flooded buoyancy room 33 includes a rear watertight wall 33a, a front watertight wall 33b, and side watertight walls 33c and 33d. The rear watertight wall 33a is arranged parallel to the bulkhead 12 at a distance on the bow side in the bow and aft direction FA. The rear watertight wall 33a extends in the ship width direction W between the freeboard deck 5 and the deck 7, and connects the side watertight walls 33c and 33d. The front watertight wall 33b is arranged parallel to the bulkhead 13 at an interval on the stern side in the bow-stern direction FA. The front watertight wall 33b extends in the ship width direction W between the freeboard deck 5 and the deck 7, and connects the side watertight walls 33c and 33d. The side watertight walls 33c and 33d are provided at positions spaced apart from the pair of sides 3A and 3B toward the center in the ship width direction W. The side watertight walls 33c and 33d extend parallel to the bow and aft direction FA between the freeboard deck 5 and the deck 7. The flooded buoyancy chamber 33 is formed into a rectangular cylindrical shape in plan view by a rear watertight wall 33a, a front watertight wall 33b, and side watertight walls 33c and 33d.

The main engine 21 may be accommodated in the submerged buoyancy room 33 in this embodiment. In this case, the screw shaft 23 connected to the main engine 21, the fuel supply pipe (not shown) that supplies fuel to the main engine 21, the exhaust pipe (not shown) that discharges exhaust gas generated in the main engine 21, etc. The portion penetrating the chamber 33 is provided with a seal structure or the like to ensure watertightness.

(Configuration of communication part)
Communication portions 42 and 43 are formed between the rear watertight wall 33a and the front watertight wall 33b of the flooded buoyancy chamber 33 and the partition walls 12 and 13. The communication portion 42 is provided between the rear watertight wall 33a of the submerged buoyancy room 33 and the bulkhead 12 on the first side (the gunwale side 3A side) and the second side with respect to the submerged buoyancy room 33 in the main engine room 10A. It communicates with the second side (the gunwale side 3B side). The communication part 43 is between the front watertight wall 33b of the flooded buoyancy room 33 and the bulkhead 13, and is connected to the first side in the ship width direction W (the gunwale side 3A side) with respect to the flooded buoyancy room 33 in the main engine room 10A. It communicates with the second side (the gunwale side 3B side).
These communication parts 42 and 43 form the submerged buoyancy room 33 as a watertight compartment that does not partition the main engine room 10A in the ship width direction W.

(effect)
In the ship 1 of the second embodiment, the main engine room 10A is formed as a watertight compartment that is not partitioned in the ship width direction W at a position spaced apart from the pair of sides 3A and 3B in the ship width direction W center side in the main engine room 10A. A submerged buoyancy chamber 33 is provided. Thereby, even if the sides 3A, 3B are damaged, the influence of the damage on the flooded buoyancy room 33 can be suppressed. Since the flooded buoyancy room 33 is a watertight compartment, water can be prevented from flooding into the interior of the flooded buoyancy room 33 when flooding occurs, and buoyancy can be generated. Therefore, even when flooding occurs, the buoyancy of the ship 1 can be ensured.

In the ship 1 of the second embodiment, communication portions 42 and 43 are provided in the main engine room 10A to communicate the first side and the second side in the ship width direction W with respect to the submerged buoyancy room 33. Thereby, the main engine room 10A is not partitioned in the ship width direction W by the communication parts 42 and 43 even if the flooded buoyancy room 33 is provided. If water floods into the main engine room 10A from either the first side or the second side in the width direction of the ship, the water will flow through the communication parts 42 and 43 to the first side in the width direction of the main engine room 10A. , and also flows into the other side of the second side. Thereby, the stability of the ship 1 can be improved.

In the ship 1 of the second embodiment, the submerged buoyancy room 33 is provided apart from the partition walls 12 and 13 in the bow and aft direction FA. Thereby, between the bulkheads 12, 13 and the flooded buoyancy room 33, a communication portion 42, which communicates the first side and the second side in the ship width direction W with respect to the flooded buoyancy room 33 in the main engine room 10A, 43 can be formed.

In the ship 1 of the second embodiment, the flooded buoyancy room 33 is formed below the freeboard deck 5. When water floods inside the main engine room 10A, the water does not flood inside the flooded buoyancy rooms 33 and 32, so the amount of water that floods below the freeboard deck 5 can be suppressed. Thereby, the effect of the buoyancy generated in the flooded buoyancy room 33 can be more efficiently exerted.

(Modified example of second embodiment)
In the second embodiment, only one submerged buoyancy room 33 is provided in the main engine room 10A, but the invention is not limited to this.
For example, as shown in FIG. 4, a plurality of (for example, four in a modified example of this embodiment) flooded buoyancy rooms 33 may be provided in the main engine room 10A as the engine area A1. In this case, the plurality of submerged buoyancy rooms 33 are provided in the main engine room 10A at positions spaced apart from the pair of sides 3A and 3B in the main engine room 10A toward the center in the ship width direction W.

Communication portions 42 and 43 are formed between the plurality of submerged buoyancy chambers 33 and the partition walls 12 and 13. Further, a communication portion 44 is formed between the submerged buoyancy rooms 33 adjacent to each other in the bow and aft direction FA. These communication parts 42 to 44 form the plurality of flooded buoyancy rooms 33 as watertight compartments that do not partition the main engine room 10A in the ship width direction W.

<Third embodiment>
Next, a third embodiment of the ship according to the present invention will be described. In the third embodiment described below, only the configuration of the submerged buoyancy room differs from the first and second embodiments, so the same parts as in the first and second embodiments will be described with the same reference numerals. Omit duplicate explanations.
(Ship configuration)
Hereinafter, a ship according to a third embodiment of the present disclosure will be described with reference to FIG. 5.
As shown in FIG. 5, the ship 1 includes a hull 2, bulkheads 51 and 54, and flooded buoyancy rooms 34 and 35.

(hull configuration)
As shown in FIG. 1, the hull 2 includes a partition wall 51, an intermediate partition wall 52, an intermediate partition wall 53, and a partition wall 54 between the freeboard deck 5 and the deck 7.
As shown in FIG. 5, the bulkhead 51 and the middle bulkhead 52 are spaced apart from each other in the bow and aft direction FA. The intermediate partition wall 52 and the intermediate partition wall 53 are spaced apart from each other in the bow and aft direction FA. The middle partition wall 53 and the partition wall 54 are spaced apart from each other in the bow and aft direction FA. The partition wall 51, the intermediate partition wall 52, the intermediate partition wall 53, and the partition wall 54 each extend from the side 3A to the side 3B, and from the freeboard deck 5 to the deck 7, respectively. That is, the space between the freeboard deck 5 and the deck 7 is partitioned in the bow and aft direction by the bulkhead 51, the middle gap 52, the middle gap 53, and the bulkhead 54.

(Engine room configuration)
In this embodiment, the section between the freeboard deck 5 and the deck 7 and between the bulkhead 51 and the bulkhead 54 is an engine room 50 serving as a machinery area A2. That is, the bulkheads 51 and 54 form an engine room 50 as an engine area A2 by dividing the inside of the hull 2 in the bow and aft direction FA. The engine room 50 includes a main engine room 50A, a generator room 50B, and a shaft room 50C.

The main engine room 50A is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, an intermediate partition wall 52, and an intermediate partition wall 53. The generator room 50B is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, the intermediate partition wall 53, and the partition wall 54. The shaft chamber 50C is formed by the sides 3A and 3B, the freeboard deck 5 and the deck 7, the partition wall 51, and the intermediate partition wall 52. The main engine room 50A and the generator room 50B are adjacent to each other in the bow and aft direction FA. The main engine room 50A and the shaft room 50C are adjacent to each other in the bow and aft direction FA.

(Configuration of flooded buoyancy room)
The submerged buoyancy rooms 34 and 35 are provided within the engine room 50. The flooded buoyancy rooms 34 and 35 are provided in the engine room 50 at positions spaced apart from the pair of sides 3A and 3B in the engine room 50 toward the center in the ship width direction W. The flooded buoyancy rooms 34 and 35 are provided at intervals in the bow and aft direction FA.

The submerged buoyancy room 34 on the bow side in the bow and aft direction FA is provided so as to penetrate the intermediate partition wall 53 and straddle both sides in the bow and aft direction FA. The flooded buoyancy room 34 includes side watertight walls 34a, 34b, a rear watertight wall 34c, and a front watertight wall 34d. The side watertight walls 34a and 34b extend between the freeboard deck 5 and the deck 7 from the intermediate partition wall 53 in parallel to both sides in the bow and aft direction FA. The rear watertight wall 34c is arranged in the main engine room 50A at a distance from the front watertight wall 35c of the submerged buoyancy room 35, which will be described later, on the stern side in the bow and aft direction, and is spaced apart from the front watertight wall 35c. arranged in parallel. The front watertight wall 34d is disposed in the generator room 50B at a distance from the bulkhead 54 on the stern side in the bow-stern direction FA, and is parallel to the bulkhead 54. The rear watertight wall 34c and the front watertight wall 34d extend in the ship width direction W between the freeboard deck 5 and the deck 7, and connect the side watertight walls 34a and 34b. This submerged buoyancy room 34 is provided so as to straddle the main engine room 50A and the generator room 50B. The flooded buoyancy chamber 34 is formed into a rectangular cylindrical shape in plan view by side watertight walls 34a and 34b, a rear watertight wall 34c, and a front watertight wall 34d.

The immersion buoyancy room 35 on the stern side in the bow and stern direction FA is provided so as to penetrate the intermediate partition wall 52 and straddle both sides in the bow and stern direction FA. The flooded buoyancy room 35 includes side watertight walls 35a, 35b, a front watertight wall 35c, and a rear watertight wall 35d. The side watertight walls 35a, 35b are provided at positions spaced apart from the pair of sides 3A, 3B toward the center in the ship width direction W. The side watertight walls 35a and 35b extend parallel to each other from the intermediate partition wall 52 to both sides in the bow and aft direction FA between the freeboard deck 5 and the deck 7. The front watertight wall 35c is spaced from the rear watertight wall 34c of the submerged buoyancy room 34 in the main engine room 50A on the stern side in the bow-stern direction. The rear watertight wall 35d is arranged in the shaft chamber 50C in parallel to the bulkhead 51 with an interval on the bow side in the bow and aft direction FA. The front watertight wall 35c and the rear watertight wall 35d extend in the ship width direction W between the freeboard deck 5 and the deck 7, and connect the side watertight walls 35a and 35b. This submerged buoyancy room 35 is provided so as to straddle the main engine room 50A and the shaft room 50C. The flooded buoyancy chamber 35 is formed into a rectangular cylindrical shape in plan view by side watertight walls 35a and 35b, a front watertight wall 35c, and a rear watertight wall 35d.

The main engine 21 and the generator engine 22 may be housed in such submerged buoyancy rooms 34 and 35.

(Configuration of communication part)
A communication portion 45 is formed between the rear watertight wall 34c of the flooded buoyancy room 34 and the front watertight wall 35c of the flooded buoyancy room 35. The communication section 45 connects the main engine room of the engine room 50 between the rear watertight wall 34c of the flooded buoyancy room 34 and the front watertight wall 35c of the flooded buoyancy room 35, which are provided at intervals in the bow and aft direction FA. 50A, the first side (the gunwale side 3A side) and the second side (the gunwale side 3B side) in the ship width direction W are communicated with the submerged buoyancy rooms 34 and 35 within 50A.

The communication portion 46 is formed between the front watertight wall 34d of the flooded buoyancy chamber 34 and the partition wall 54. The communication portion 46 is connected between the front watertight wall 34d of the submerged buoyancy room 34 and the bulkhead 54, which are provided at intervals in the bow and aft direction FA, and the submerged buoyancy room 34 within the generator room 50B of the engine room 50. The first side (the gunwale side 3A side) and the second side (the gunwale side 3B side) in the ship width direction W are communicated with each other.

The communication portion 47 is formed between the rear watertight wall 35d of the flooded buoyancy chamber 35 and the partition wall 51. The communication portion 47 is connected to the submerged buoyancy room 35 within the shaft chamber 50C of the engine room 50 between the rear watertight wall 35d of the submerged buoyancy room 35, which is provided at intervals in the bow and stern direction FA, and the bulkhead 51. The first side (the gunwale side 3A side) and the second side (the gunwale side 3B side) in the ship width direction W are communicated with each other.
These communication parts 45 to 47 form the submerged buoyancy rooms 34 and 35 as watertight compartments that do not partition the engine room 50 in the ship width direction W.

(effect)
In the ship 1 of the third embodiment, the engine room 50 is not partitioned in the ship width direction W at a position spaced apart from the pair of sides 3A and 3B toward the center side in the ship width direction W in the engine room 50 as the engine room A2. Floating buoyancy chambers 34 and 35 formed as watertight compartments are provided. Thereby, even if the sides 3A and 3B are damaged, the influence of the damage on the flooded buoyancy rooms 34 and 35 can be suppressed. Since the flooded buoyancy rooms 34 and 35 are watertight compartments, even in the event of flooding, water can be prevented from flooding into the flooded buoyancy rooms 34 and 35, and buoyancy can be generated. Therefore, even when flooding occurs, the buoyancy of the ship 1 can be ensured.

Furthermore, by ensuring the buoyancy of the ship 1 in the event of flooding in this manner, it is possible to suppress the need to reduce the height of the center of gravity of the ship 1 by reducing the size of the upper structure, etc. in order to improve stability in the event of flooding. This increases the degree of freedom in designing the layout of each part of the superstructure, such as living quarters. In addition, in order to improve stability in the event of flooding, there is no need to subdivide the watertight compartments in each part of the hull 2, which reduces the weight of steel materials, reduces the construction cost of the ship 1, and improves propulsion performance. etc. can also be achieved.

In the ship 1 of the third embodiment, communication portions 45 to 47 are provided in the engine room 50 to communicate the first side and the second side in the ship width direction W with respect to the submerged buoyancy rooms 34 and 35. Thereby, even if the flooded buoyancy rooms 34 and 35 are provided, the engine room 50 is not partitioned in the ship width direction W. When water floods into the main engine room 50A, generator room 50B, and shaft room 50C of the engine room 50 from either the first side or the second side in the ship width direction W, the water that has entered will flow through the communication parts 45 to 47. It also flows into the other of the first side and second side of the main engine room 50A, generator room 50B, and shaft room 50C in the ship width direction W. Thereby, the stability of the ship 1 can be improved.

In the ship 1 of the above embodiment, the flooded buoyancy rooms 34 and 35 are formed below the freeboard deck 5. When water floods inside the engine room 50, the water does not flood inside the flood buoyancy rooms 34, 35, so the amount of water that floods below the freeboard deck 5 can be suppressed. Thereby, the effect of the buoyancy generated in the submerged buoyancy chambers 34 and 35 can be more efficiently exerted.

(Modified example of third embodiment)
In the above embodiment, the flooded buoyancy rooms 34 and 35 are formed so as to straddle both sides of the bow and aft direction FA with respect to the intermediate partition walls 52 and 53. For example, as shown in FIG. 34, an internal bulkhead 55 that extends in the transverse direction W continuously from the intermediate partition wall 53 is provided, and an internal partition wall 56 that extends in the transverse direction W continuously from the intermediate partition wall 52 is provided in the submerged buoyancy room 35. You may.

(Other embodiments)
Although the embodiment of the present disclosure has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and may include design changes without departing from the gist of the present disclosure.
In the first and second embodiments described above, the main engine room 10A is exemplified as the engine room A1 in which the submerged buoyancy rooms 31 to 33 are provided, but the invention is not limited to this. For example, the submerged buoyancy rooms 31 to 33 are It may be provided in the aircraft compartment 10B or the shaft compartment 10C.
Further, in the third embodiment, the submerged buoyancy chambers 34 and 35 are provided, but only one of them may be provided.

Further, in the first to third embodiments described above, the flooded buoyancy rooms 31 to 35 are provided below the freeboard deck 5, but the present invention is not limited to this.
For example, as shown in FIG. 7, a portion of the submerged buoyancy rooms 31 to 35 may be provided so as to protrude above the freeboard deck 5.
As a result, the volumes of the flooded buoyancy chambers 31 to 35 can be increased, and the effect of the buoyancy generated in the flooded buoyancy chambers 31 to 35 can be further enhanced.

Further, as shown in FIG. 8, an upper submerged buoyancy room 60 may be further provided above the freeboard deck 5 and below the upper deck 8. In this case, the upper flooded buoyancy room 60 is separated from the flooded buoyancy rooms 31 to 35 by the freeboard deck 5. The upper submerged buoyancy room 60, like the submerged buoyancy rooms 31 to 35 shown in each of the above embodiments, is formed as a watertight compartment at a position spaced from the pair of sides 3A, 3B toward the center in the ship width direction W.
Thereby, by providing the upper flooded buoyancy room 60 in addition to the flooded buoyancy rooms 31 to 35, the buoyancy generated in the flooded buoyancy rooms 31 to 35 and the upper flooded buoyancy room 60 can be further increased.
Note that this upper flooded buoyancy room 60 is not limited to the location directly above the flooded buoyancy rooms 31 to 35, but may be located anywhere between the bow bulkhead 19A and the stern bulkhead 19B, and between the freeboard deck 5 and the upper deck 8. It may be provided at any position.

Furthermore, in the first to third embodiments described above, the submerged buoyancy chambers 31 to 35 have a rectangular shape in plan view, but the shape is not limited to this, and the shape etc. can be changed as appropriate.
In addition, when flooding occurs, water or the like may be pumped into the flooded buoyancy rooms 31 to 35 from the outside to improve the stability and stability of the ship 1.

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

(1) The ship 1 according to the first aspect includes a hull 2 having a pair of sides 3A, 3B and a bottom 4, and the interior of the hull 2 is divided in the bow and aft direction FA to form machinery areas A1 and A2. The bulkheads 12, 13, 51, 54 and the machinery spaces A1, A2 in the ship width direction W at a position spaced apart from the pair of sides 3A, 3B in the ship width direction W in the machinery spaces A1, A2. The submerged buoyancy chambers 31 to 35 are formed as undivided watertight compartments.
Examples of the engine areas A1 and A2 include the main engine room 10A, the generator room 10B, the shaft room 10C, and the engine room 50.

In this ship 1, submerged buoyancy rooms 31 to 35 are provided at positions spaced apart from the sides 3A and 3B toward the center side in the width direction W of the ship. Thereby, even if the sides 3A and 3B are damaged, the influence of the damage on the flooded buoyancy rooms 31 to 35 can be suppressed. Since the flooded buoyancy rooms 31 to 35 are watertight compartments, even in the event of flooding, water can be prevented from flooding into the flooded buoyancy rooms 31 to 35, and buoyancy can be generated. Therefore, even when flooding occurs, the buoyancy of the ship 1 can be ensured.

(2) The ship 1 according to the second aspect is the ship 1 according to (1), and is located on the first side in the ship width direction W and on the first side in the ship width direction W with respect to the flooded buoyancy rooms 31 to 35 in the machinery spaces A1 and A2. It further includes communication parts 41 to 47 that communicate with the two sides.

Thereby, even if the submerged buoyancy rooms 31 to 35 are provided, the machinery areas A1 and A2 are not partitioned in the ship width direction W. If water floods into the machinery spaces A1, A2 from either the first side or the second side in the ship width direction, the intruding water will flow through the communication parts 41 to 47 to the widthwise W side of the machinery spaces A1, A2. It also flows into the other side of the first side and the second side. Thereby, the stability of the ship 1 can be improved.

(3) The ship 1 according to the third aspect is the ship 1 of (1) or (2), in which at least the main engine 21 is housed inside the flooded buoyancy rooms 33 to 35.

Thereby, even if water floods into the machinery spaces A1 and A2, it is possible to prevent the main engine 21 housed inside the flooded buoyancy rooms 33 to 35 from stopping its operation.

(4) The ship 1 according to the fourth aspect is one of the ships 1 according to (1) to (3), and the flooded buoyancy rooms 33 to 35 are connected to the bulkheads 12, 13, 51, and 54. On the other hand, they are provided spaced apart in the bow and aft direction FA.

As a result, between the bulkheads 12, 13, 51, 54 and the submerged buoyancy rooms 33 to 35, the first side and the second Communication portions 42 to 47 that communicate with the sides can be formed.

(5) The ship 1 according to the fifth aspect is any one of (1) to (4), and the flooded buoyancy rooms 31 to 35 are formed below the freeboard deck 5. There is.

As a result, even if water floods into the machinery spaces A1 and A2, the water does not flood inside the flooded buoyancy rooms 31 to 35, so the amount of water flood can be suppressed. Thereby, the effect of the buoyancy generated in the submerged buoyancy rooms 31 to 35 can be more efficiently exerted.

(6) The ship 1 according to the sixth aspect is the ship 1 according to (5), in which a portion of the flooded buoyancy rooms 31 to 35 are provided to protrude above the freeboard deck 5.

As a result, the volumes of the flooded buoyancy chambers 31 to 35 can be increased, and the effect of the buoyancy generated in the flooded buoyancy chambers 31 to 35 can be further enhanced.

(7) The ship 1 according to the seventh aspect is any one of the ships 1 according to (1) to (6), and has a structure in which the ship 1 is provided on the upper side of the freeboard deck 5 from the pair of sides 3A and 3B in the ship width direction. It further includes an upper submerged buoyancy chamber 60 formed as a watertight compartment at a position spaced apart from the W center side.

Thereby, by providing the upper flooded buoyancy room 60 in addition to the flooded buoyancy rooms 31 to 35, the buoyancy generated in the flooded buoyancy rooms 31 to 35 and the upper flooded buoyancy room 60 can be further increased.

1... Vessel 2... Hull 2a... Bow part 2b... Stern part 3A, 3B... Broadside 4... Bottom 5... Freeboard deck 6... Upper deck 7... Deck 8... Upper deck 9... Screw 19A... Bow bulkhead 19B... Stern bulkhead 10 ...Engine room 10A...Main engine room 10B...Generator room 10C...Shaft room 11...Rear bulkhead 12, 13, 51, 54...Bulkhead 14...Front bulkhead 21...Main engine 22...Generator engine 23...Screw shaft 31~ 35...Immersion buoyancy room 31a, 31b, 32a, 32b, 33c, 33d, 34a, 34b, 35a, 35b...Side watertight wall 31c, 33a, 34c, 35d...Rear watertight wall 32c, 33b, 34d, 35c...Front part Watertight walls 41 to 47...Communication section 50...Engine room 50A...Main engine room 50B...Generator room 50C...Shaft chambers 52, 53...Middle partition walls 55, 56...Internal partition wall 60...Upper flooded buoyancy room A1, A2...Machine area FA...Fore and aft direction W...Ship width direction

Claims (4)

a hull having a pair of sides and a bottom;
a bulkhead forming a machinery area by dividing the inside of the hull in the bow and aft direction;
a submerged buoyancy room formed as a watertight compartment that does not partition the machinery area in the ship width direction, at a position spaced apart from the pair of sides in the ship width direction in the engine room;
further comprising a communication part that communicates a first side and a second side in the ship width direction with respect to the flooded buoyancy room in the machinery area,
The flooded buoyancy room is
It is provided spaced apart from each of the bulkheads in the bow and stern direction,
A ship in which at least a main engine is housed inside the flooded buoyancy room . The ship according to claim 1 , wherein the flooded buoyancy room is formed below a freeboard deck. The ship according to claim 2 , wherein a portion of the flooded buoyancy room is provided to protrude above the freeboard deck. The ship according to any one of claims 1 to 3 , further comprising an upper flooded buoyancy room formed as a watertight compartment at a position spaced apart from the pair of sides toward the center in the width direction of the ship above the freeboard deck.

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