JP2018138418A - Ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ship which can inhibit influence on a mounting space of a vehicle.SOLUTION: A ship 1 includes: a full 2 including a deck 10 on which a vehicle autonomously travels to get; a gas engine which is driven with a liquefied gas used as a fuel; and multiple fuel tanks 21 for storing the fuel. The multiple fuel tanks 21 include: a left side fuel tank 21A which is disposed adjacent to a port side 4A of the hull 2; a right side fuel tank 21B which is disposed adjacent to a bow side 4B of the hull 2; and a casing 22 covering the left side fuel tank 21A and the right side fuel tank 21B from the outer side. The left side fuel tank 21A and the right side fuel tank 21B covered by the casing 22 are disposed so as to penetrate through the deck 10 in a vertical direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ship in which a vehicle can travel on its own.

Examples of ships that the vehicle can travel on board include a car ferry, an RO-RO ship (roll-on / roll-off ship), a PCC (Pure Car Carrier), and a PCTC (Pure Car & Truck Carrier). In such a ship, for example, in order to improve environmental performance, it may be desired to use liquefied gas such as LNG (Liquefied Natural Gas) as fuel.
In Patent Document 1, in a ship equipped with a gas engine that uses liquefied gas such as LNG (Liquefied Natural Gas) as a fuel, a fuel tank that stores the liquefied gas is provided in an engine room casing that extends from the engine room to the outside of the ship. A technique for arranging them along the vertical direction is described.

Japanese Patent No. 5134621

  A fuel tank that stores liquefied gas, such as a fuel tank of a ship described in Patent Document 1, is larger than a fuel tank that stores diesel fuel or the like. As a result, the mounting space of the vehicle may be affected.

  This invention is made in view of the said situation, and provides the ship which can suppress the influence on the mounting space of a vehicle.

In order to solve the above problems, the following configuration is adopted.
According to the first aspect of the present invention, a ship includes a hull including a deck on which a vehicle can travel and board, a gas engine that uses liquefied gas as fuel, a plurality of fuel tanks that store the fuel, The plurality of fuel tanks comprises a left fuel tank disposed adjacent to the port side of the hull and a right fuel tank disposed adjacent to the starboard side of the hull, and the left fuel The tank and the right fuel tank are arranged so as to penetrate the deck in the vertical direction.
With this configuration, the plurality of fuel tanks are disposed adjacent to the port side and the starboard side, respectively, so that a large vehicle mounting space and a vehicle travel path can be secured on the deck. . Thereby, the usability of the vehicle mounting space and the vehicle travel path can be improved. As a result, even when a fuel tank for storing liquefied gas is disposed, the influence on the mounting space of the vehicle can be suppressed.

According to the second aspect of the present invention, a plurality of left side tanks according to the first aspect are arranged side by side in the bow / stern direction along the port side, and a plurality of right side fuel tanks are arranged side by side in the bow / stern direction along the starboard side. The number of the left fuel tanks arranged and the number of the right fuel tanks arranged may be the same.
By configuring in this way, the left fuel tank and the right fuel tank are arranged in the same number, so that the occurrence of imbalance in the ship width direction of the hull can be suppressed.

According to a third aspect of the present invention, in the ship according to the first or second aspect, the ship includes a casing that covers each of the left fuel tank and the right fuel tank from the outside, and the casing is fixed to the deck. Also good.
By comprising in this way, the casing which covers a left side fuel tank and a right side fuel tank from the outside can be utilized as a support structure that supports a plurality of decks. Therefore, a dedicated support structure for supporting the deck can be omitted, and an increase in the weight of the hull can be suppressed.

According to a fourth aspect of the present invention, in the ship according to any one of the first to third aspects, the left fuel tank and the right fuel tank have the same shape, and the ship width of the hull. You may arrange | position in the position symmetrical with respect to the centerline of a direction.
By comprising in this way, it can suppress that the imbalance of the ship width direction of a hull arises by the difference in weight and arrangement | positioning of a left side fuel tank and a right side fuel tank.

  According to the above-mentioned ship, the influence on the mounting space of the vehicle can be suppressed.

It is a side view which shows schematic structure of the ship of this embodiment. It is sectional drawing which follows the II-II ship of FIG. It is sectional drawing which follows the III-III line of FIG. It is an enlarged view of the fuel tank in the 1st modification of embodiment of this invention. It is an enlarged view of the fuel tank in the 2nd modification of embodiment of this invention. It is an enlarged view of the fuel tank in the 3rd modification of embodiment of this invention.

Next, a ship according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of the ship of this embodiment. FIG. 2 is a sectional view taken along the II-II ship of FIG. 3 is a cross-sectional view taken along line III-III in FIG.
As shown in FIGS. 1 to 3, the ship 1 in this embodiment includes a hull 2 and an upper structure 3.

  The hull 2 has anchor sides 4A and 4B, a ship bottom 5, and a plurality of decks 10. The heel side 4A, 4B is composed of a pair of heel side outer plates that respectively constitute the left and right heel sides. The ship bottom 5 consists of a ship bottom outer plate that connects these anchor sides 4A and 4B. As shown in FIG. 2, the hull 2 has a U-shaped cross section perpendicular to the bow-stern direction by the pair of anchor sides 4 </ b> A and 4 </ b> B and the ship bottom 5. A plurality of decks 10 are provided in the hull 2 at intervals in the vertical direction. The hull 2 has a double bottom, and an inner bottom plate 5B is disposed above the outer bottom plate 5A with a space therebetween.

The hull 2 includes a screw 7 and a rudder 8 below the stern 2A.
The screw 7 is rotationally driven by a gas engine 9 that is a main engine provided in the hull 2, and converts the rotational energy of the gas engine 9 into a propulsive force of the hull 2. The rudder 8 is provided behind the screw 7 and controls the traveling direction of the hull 2.
The gas engine 9 is driven in the liquefied gas as fuel, and is disposed in the main engine room 11 that is partitioned on the side close to the stern 2A in the lowermost layer of the hull 2. The liquefied gas in this embodiment is LNG (Liquefied Natural Gas).

  The hull 2 further includes two shore lamps 12 for loading and unloading cargo such as vehicles. The ship 1 in this embodiment illustrates a case where a shore lamp 12 (a stern lamp 12A, a center lamp 12B) is provided at an intermediate position between the stern 2A and the stern side 4B in the stern direction. These shore lamps 12 are connected to a dry deck 10A which is a so-called boarding deck arranged in an intermediate layer of the deck 10 of the hull 2 formed in a hierarchical shape. When these shore lamps 12 are tilted and deployed, a vehicle such as a passenger car or a truck can self-propell from the quay through the shore lamp 12 and get into the freeboard deck 10A. A boarded vehicle (not shown) is transported by stopping at a predetermined mounting position on the deck 10 of a predetermined hierarchy, for example, via a rampway 13 that is a ramp connecting the upper and lower adjacent decks 10 to each other. Is done. The ramp way 13 can be raised and lowered, for example, and can be used as a vehicle mounting space after use, for example.

  The hull 2 further includes a plurality of rectangular partial transverse bulkheads 14 (see FIG. 3) on the left and right sides 4A and 4B. These rectangular partial transverse bulkheads 14 (also referred to as bones) are arranged at a plurality of locations at intervals in the bow-stern direction (direction indicated by A-F in the figure). The rectangular partial horizontal partition wall 14 provided on the left heel side 4A is formed to extend in the vertical direction along the inner side surface 4Ai (see FIG. 3) of the left heel side 4A. The rectangular partial horizontal partition wall 14 provided on the right heel side 4B is formed to extend in the vertical direction along the inner side surface 4Bi (see FIG. 3) of the right heel side 4B. In the rectangular partial horizontal partition wall 14 illustrated in this embodiment, two rectangular partial horizontal partition walls 14 arranged so as to be adjacent to each other in the bow-stern direction form one set, and a plurality of sets of these rectangular partial horizontal partition walls 14 are provided. Are arranged at intervals in the fore-and-aft direction. In addition, in FIG. 2, the rectangular partial horizontal partition 14 is not shown.

The upper structure 3 is formed on the upper deck 10 </ b> B (see FIG. 1) of the hull 2. The upper structure 3 includes a bridge 3A and a residential area 3B.
In FIG. 3, the symbol “EC” is an engine casing connected from the main engine compartment 11 to the funnel F. The engine casing EC is formed from the main engine compartment 11 toward the upper deck 10B along the left side 4A. The exhaust pipe of the gas engine 9 extends to the funnel F (see FIG. 1) through the engine casing EC.

  As shown in FIG. 2, the hull 2 includes a plurality of fuel storage units 20 for storing liquefied gas that is fuel of the main engine. The fuel storage unit 20 includes a fuel tank 21, a casing 22, and a fuel supply pipe 23.

  The fuel tank 21 is a pressure vessel that stores liquefied gas in a high-pressure and low-temperature state. The fuel tank 21 is disposed so as to penetrate the deck 10 in the vertical direction. That is, the fuel tanks 21 are arranged in a vertically placed posture in which each deck 10 and the central axis C1 of the fuel tank 21 are substantially orthogonal. The fuel tank 21 in this embodiment includes an upper end portion 21a, a trunk portion 21b, and a lower end portion 21c.

  The upper end portion 21a is formed in a hemispherical shape that protrudes upward. The trunk | drum 21b is formed in the cylindrical shape in which the axis line (center axis C1) direction faces an up-down direction. The lower end 21c is formed in a hemispherical shape that protrudes downward. The fuel tank 21 is connected to a pipe such as a fuel supply pipe 23 at the upper end 21a so that liquefied gas can be taken in and out from the upper end 21a. In addition, the vertical direction in this embodiment can be said to be a direction perpendicular to the reference plane 5K of the ship bottom 5, in other words, the height direction of the hull 2.

  As shown in FIGS. 2 and 3, the casing 22 covers the fuel tank 21 from the outside. The casing 22 exemplified in this embodiment is formed in a prismatic shape having a quadrangular cross section perpendicular to the central axis C <b> 1 of the fuel tank 21. The inner surface 22 a of the casing 22 is separated from the outer peripheral surface 21 </ b> S of the fuel tank 21. The fuel tank 21 is supported, for example, on the upper portion of the casing 22 and suppresses displacement of the pipe connection portion due to thermal expansion or the like. A heat insulating material (not shown) or the like may be attached to the inner side surface 22a of the casing 22 and the outer peripheral surface 21S of the fuel tank 21.

  The casing 22 has a function as a structure that supports between the layers of the deck 10. The casing 22 is fixed to the deck 10 of each level by welding or the like. Since the casing 22 functions as a structure that supports the deck 10 as described above, the rectangular partial transverse partition wall 14 described above can be omitted in a range where the casing 22 is disposed in the bow-stern direction.

As shown in FIG. 3, the fuel tank 21 includes a left fuel tank 21A and a right fuel tank 21B.
The left fuel tank 21 </ b> A is disposed adjacent to the left side 4 </ b> A of the hull 2. A plurality of the left fuel tanks 21A are arranged side by side in the fore-and-aft direction along the left side 4A. Two left fuel tanks 21A in this embodiment are arranged side by side in the fore-and-aft direction along the left side 4A. These two left fuel tanks 21 </ b> A are covered with a single casing 22.

  The right fuel tank 21B is disposed adjacent to the right side 4B of the hull 2. A plurality of right fuel tanks 21B are arranged side by side in the fore-and-aft direction along the right side 4B. Two right side fuel tanks 21B in this embodiment are arranged side by side in the fore-and-aft direction along the right side 4B, similarly to the left side fuel tank 21A. That is, the number of the left fuel tanks 21A arranged and the number of the right fuel tanks 21B arranged are the same. These two right fuel tanks 21B are also covered by a single casing 22 in the same manner as the left fuel tank 21A. In the following description, when there is no need to distinguish between the left fuel tank 21A and the right fuel tank 21B, the fuel tank 21 may be simply referred to.

The left fuel tank 21A and the right fuel tank 21B in this embodiment have the same size and shape, and immediately above the upper deck 10B from a position immediately above the double bottom inner bottom plate 5B (see FIG. 2). It is arranged over the lower position. And the casing 22 which covers these fuel tanks 21 is arrange | positioned over the position just above the upper deck 10B from the inner bottom board 5B. Of the casing 22, a protruding portion 24 protruding upward from the upper deck 10 </ b> B is a space for connecting a pipe to the fuel tank 21.
Further, the left fuel tank 21A and the right fuel tank 21B in this embodiment are arranged so that the positions in the bow-stern direction are the same position. That is, the left fuel tank 21A and the right fuel tank 21B are arranged symmetrically with respect to the center line C2 in the ship width direction.

  Furthermore, the fuel tank 21 in this embodiment is disposed between the center lamp 12B and the stern lamp 12A in the bow-stern direction. More specifically, the fuel tank 21 is disposed between the center lamp 12B and the stern lamp 12A on the side close to the center lamp 12B.

  The hull 2 exemplified in this embodiment includes a first ramp way 13 </ b> A and a second ramp way 13 </ b> B as two ramp ways 13. The first ramp way 13A is an inclined path for the vehicle to travel by itself between the dry deck 10A and the lower deck 10. The first ramp way 13A is disposed between the center line C2 in the ship width direction and the left fuel tank 21A. This first ramp way 13A is normally used by vehicles getting on and off the stern ramp 12A.

  The second ramp way 13B is an inclined road for the vehicle to travel on its own between the freeboard deck 10A and the upper deck 10 thereof. The second ramp way 13B is disposed on the bow 2F side of the center ramp 12B in the bow-tail direction. The second ramp way 13B is disposed at a position closer to the center line C2 in the ship width direction than the right side 4B in the ship width direction. This second ramp way is normally used by vehicles getting on and off the center ramp.

  As shown in FIG. 2, the hull 2 exemplified in this embodiment includes a bunker station 25. The bunker station 25 is a connection part that enables fuel supply to the fuel tank 21 at sea. In the hull 2 in this embodiment, bunker stations 25 are disposed on the left side 4A near the left fuel tank 21A and the right side 4B near the right fuel tank 21B, respectively. The bunker station 25 may be provided only on either the starboard side or the port side.

  The fuel stored in the fuel tank 21 described above is supplied to the gas engine 9 via the fuel supply pipe 23. The fuel supply pipes 23 reach the inner bottom plate 5B from the respective upper end portions 21a of the fuel tank 21 along the inner side surface of the casing 22, and on the inner bottom plate 5B between the right and left casings 22 of the center line C2, 11 is led to the gas fuel adjusting chamber FPR adjacent to the gas fuel adjusting chamber FPR. In the gas fuel adjustment chamber FPR, the liquefied gas is vaporized using, for example, seawater. The vaporized gas is supplied to the gas engine 9 in the main engine room 11 and is used to drive the gas engine 9.

  Therefore, according to the above-described embodiment, the plurality of fuel tanks 21 are respectively disposed adjacent to the left dredging side 4A and the right dredging side 4B. A traveling path can be secured. Thereby, the usability of the vehicle mounting space and the vehicle travel path can be improved. As a result, even when the fuel tank 21 for storing the liquefied gas is disposed, the influence on the mounting space of the vehicle can be suppressed.

  Further, the number of the left fuel tanks 21A arranged is the same as the number of the right fuel tanks 21B arranged. Therefore, it is possible to suppress the occurrence of imbalance in the ship width direction of the hull 2. Further, since the left fuel tank 21A and the right fuel tank 21B are arranged symmetrically with respect to the center line C2 in the ship width direction, the occurrence of unbalance in the ship width direction of the hull 2 is further suppressed. it can.

  Furthermore, the casing 22 can be used as a structure that supports the multiple layers of the deck 10. Therefore, the rectangular partial transverse bulkhead 14 that supports the deck 10 by the amount of the casing 22 and suppresses deformation of the hull can be omitted. As a result, the weight increase of the hull 2 can be suppressed. In addition, since the casing 22 is a structure that supports the fuel tank 21, the casing 22 has higher rigidity than the normal rectangular partial horizontal partition wall 14. Therefore, the rigidity of the hull 2 can be increased by using the casing 22 as a structure that supports the deck 10 of the hull 2 as compared with the case where the rectangular partial transverse bulkhead 14 is used.

  Next, first to third modifications of the above-described embodiment will be described with reference to the drawings. The first to third modifications are different from the above-described embodiment only in the number and height of the fuel tank 21. For this reason, the same portions as those in the above-described embodiment are described with the same reference numerals, and redundant descriptions are omitted.

(First and second modifications)
FIG. 4 is an enlarged view of the fuel tank in the first modification of the embodiment of the present invention. FIG. 5 is an enlarged view of a fuel tank in a second modification of the embodiment of the present invention.
In the above-described embodiment, the case where the fuel tank 21 is formed with a length from a position immediately above the inner bottom plate 5B to a position immediately below the upper deck 10B is illustrated. However, the length of the fuel tank 21 is not limited to the length of the above-described embodiment. For example, as in the first modification shown in FIG. 4, the upper end 121 </ b> A of the fuel tank 121 may be formed so as to protrude slightly above the upper deck 10 </ b> B. The upper end portion 121 </ b> A of the fuel tank 121 may penetrate the casing 22 and be exposed to the outside of the hull 2. In this case, since the capacity of the fuel tank 21 can be increased, more liquefied gas can be mounted than the fuel tank 21 of the above-described embodiment. The casing 22 may cover the upper end 121A from the outside.

  Further, as in the second modified example shown in FIG. 5, the length of the fuel tank 221 is a length from a position immediately above the inner bottom plate 5B to the vicinity of the intermediate position between the freeboard deck 10A and the upper deck 10B. Also good. In this case, since the fuel tank 221 is not disposed on the upper portion of the hull 2, it is possible to suppress the center of gravity of the hull 2 from being increased. Moreover, by carrying out like a 2nd modification, the vehicle mounting space of the deck 10 located in the hierarchy higher than the said intermediate position can be expanded.

(Third modification)
FIG. 6 is an enlarged view of a fuel tank in a third modification of the embodiment of the present invention.
In the above-described embodiment, the case where two right fuel tanks 21B and two left fuel tanks 21A are arranged has been described. However, the number of the right fuel tank 21B and the left fuel tank 21A disposed is not limited to two.
For example, as shown in FIG. 6, three right fuel tanks 321B and three left fuel tanks 321A may be disposed, or four or more equal numbers may be disposed although illustration is omitted. In FIG. 6, only the right fuel tank 321B is shown, but the left fuel tank 321A has the same configuration.

The present invention is not limited to the configuration of the above-described embodiment, and the design can be changed without departing from the gist thereof.
For example, in the above-described embodiment, the case where a plurality of fuel tanks 21 are accommodated in one casing 22 has been described. However, the fuel tanks 21 may be covered with the casing 22 one by one. By doing so, the rigidity of the hull 2 can be further increased.

Moreover, although the case where the casing 22 was fixed to the deck 10 of each hierarchy was demonstrated in embodiment mentioned above, it does not need to be fixed to the deck 10 directly. The casing 22 is not limited to being fixed to the deck 10 of all levels, and may be fixed only to the deck 10 of some levels.
Furthermore, in the above-described embodiment, the case where the central axis C1 of the fuel tank 21 extends in a direction perpendicular to the reference surface 5K of the ship bottom 5 has been described. However, the central axis C1 may be slightly inclined with respect to a straight line extending perpendicular to the reference plane 5K.

  In the above-described embodiment, the case where the deck 10 is provided in a hierarchical manner has been described. For example, a liftable deck that can be lifted and lowered with a vehicle mounted may be provided between the decks 10. .

  Further, in the above-described embodiment, the car carrier ship is described as an example of the ship 1. However, the ship may be a ship in which the vehicle can travel by itself and may be a ship such as a car ferry.

Furthermore, in the ship 1 of the above-described embodiment, a ship having two shore lamps 12 has been described, but only one shore lamp 12 may be provided. Further, the arrangement of the ramp way 13 inside the hull 2 is not limited to the arrangement of the ramp way 13 exemplified in the above-described embodiment. In other words, the ramp way 13 may not be disposed between the left fuel tank 21A and the right fuel tank 21B.
Furthermore, in the above-described embodiment, the ship 1 using only the gas engine 9 as a drive source has been described as an example. However, a ship equipped with both a gas engine and another internal combustion engine may be used. The gas engine may be a dual fuel engine that can also use conventional oil fuel.

  The two rectangular partial transverse partitions arranged so as to be adjacent to each other in the bow-stern direction in FIG. 3 do not have to be two, and may be one, or three or more. Further, the number of the rectangular partial horizontal bulkheads may be one, and the partial horizontal bulkhead wider than the rectangular partial horizontal bulkhead in the horizontal direction of the hull may be used.

DESCRIPTION OF SYMBOLS 1 Ship 2 Hull 3 Superstructure 4A, 4B Fence side 5 Ship bottom 5A Outer bottom plate 5B Inner bottom plate 7 Screw 8 Rudder 9 Gas engine 10 Deck 11 Main engine room 12 Shore lamp 12A Stern lamp 12B Center lamp 13 Lampway 13A First lampway 13B First Two ramp ways 14 Rectangle part horizontal partition 20 Fuel storage part 21 Fuel tank 22 Casing 23 Fuel supply piping (pipe)
24 Projection 25 Bunker Station

Claims (4)

A hull with a deck on which the vehicle can travel and ride,
A gas engine that uses liquefied gas as fuel,
A plurality of fuel tanks for storing the fuel,
The plurality of fuel tanks are
A left side fuel tank disposed adjacent to the port side of the hull;
A right fuel tank disposed adjacent to the starboard side of the hull;
A casing that covers each of the left fuel tank and the right fuel tank from the outside, and
The left fuel tank and the right fuel tank covered with the casing are arranged so as to penetrate the deck in the vertical direction. A plurality of the left fuel tanks are arranged side by side in the bow / stern direction along the port side,
A plurality of the right fuel tanks are arranged side by side in the fore-and-aft direction along the starboard side,
The ship according to claim 1, wherein the number of the left fuel tanks arranged is the same as the number of the right fuel tanks arranged.   The ship according to claim 1 or 2, wherein the casing is fixed to the deck. The left fuel tank and the right fuel tank are:
The ship according to any one of claims 1 to 3, wherein each of the ships has the same shape and is arranged in a symmetrical position with respect to a center line in the ship width direction of the hull.

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