WO2010024011A1

WO2010024011A1 - Liquefied gas carrier ship

Info

Publication number: WO2010024011A1
Application number: PCT/JP2009/060121
Authority: WO
Inventors: 彩平松; 健司津村; 宏一佐藤
Original assignee: 三菱重工業株式会社
Priority date: 2008-08-29
Filing date: 2009-06-03
Publication date: 2010-03-04
Also published as: CN102089202A; JP2010076743A; RU2463199C2; JP5180897B2; KR101308275B1; KR20110018937A; CN102089202B

Abstract

Provided is a liquefied gas carrier ship wherein a gangway ladder installed in a terminal at which the liquefied gas carrier ship is scheduled to dock can be bridged entirely even if an upper deck is arranged at a low position. A liquefied gas carrier (1) comprises a plurality of spherical tanks (2) for storing liquefied gas therein, arranged in the bow-stern direction and secured to the hull (5) through a skirt, and one or a plurality of tank covers (7) covering the upper half portion of the spherical tanks (2) and extending in the bow-stern direction and the beam direction, wherein a walkway (20) on which a gangway ladder installed in a terminal docked for loading/unloading work is to be bridged is provided above an upper deck (6) located between the side surface (7a) of the tank cover (7) and a side shell (9).

Description

Liquefied gas carrier

The present invention relates to a liquefied gas carrier ship, and more particularly to an LNG ship that stores and transports natural gas (LNG) liquefied at low temperature in a moss type spherical tank.

As a liquefied gas carrier ship that stores and transports natural gas (LNG) liquefied at a low temperature in a moss type spherical tank, for example, one disclosed in Patent Document 1 is known.
In recent years, a liquefied gas carrier ship in which the upper half of a plurality of spherical tanks arranged along the stern direction is covered with one continuous tank cover is also known (see Patent Document 2). .

Japanese Patent Publication No. 5-49519 JP 2005-521589 A

In the liquefied gas carrier disclosed in Patent Document 2 above, the position of the upper deck over which the gangway ladder (the ladder on the shore side) installed at the terminal docked for cargo handling work is placed is lower than the conventional level. Will be. Therefore, depending on the terminal, there is a possibility that the position of the upper deck on which the gangway ladder is bridged is too low to bridge the gangway ladder.

The present invention has been made in view of the above circumstances, and even when the upper deck is arranged at a low position, it is possible to bridge all of the gangway ladders installed at the terminal scheduled to be docked. The purpose is to provide a liquefied gas carrier.

The present invention employs the following means in order to solve the above problems.
The liquefied gas carrier ship according to the present invention stores a liquefied gas therein, and is arranged along the bow-stern direction and fixed to the hull via a skirt, and a top of these spherical tanks. A liquefied gas carrier ship that covers one half and includes one or a plurality of tank covers that extend along the stern direction and the width direction of the tank, between the side surface of the tank cover and the ship side skin A walkway over which a gangway ladder installed at a terminal docked to carry out cargo handling work is provided above the upper deck.

According to the liquefied gas carrier ship according to the present invention, the gangway ladder installed at the terminal is bridged over the upper surface of the walkway, so even when the upper deck is arranged at a low position, it is installed at the terminal. It is possible to bridge the gangway ladder that has been installed, and to improve the compatibility with the gangway ladder installed in the terminal.

In the liquefied gas carrier, it is more preferable that the walkway extends continuously from the front of the residential area to the front end of the side surface of the tank cover.

According to such a liquefied gas carrier, it is arranged in a space (for example, a space surrounded by a foundation deck, an upper deck, a longitudinal bulkhead, and a ship side shell) formed below the upper deck. Electric wires, oil piping, water piping, fire extinguishing piping, compressed air piping, etc. can be placed in an open space (a space formed between the walk deck and the upper deck) formed below the walk deck. .
As a result, maintenance / inspection work for electric wires, oil piping, water piping, fire extinguishing piping, compressed air piping, and the like can be easily performed, and maintainability can be improved.

In the above liquefied gas carrier, if the walkway is partially provided in a location suitable for bridging the gangway ladder between the front of the residential area and the front end of the side surface of the tank cover, Is preferred.

According to such a liquefied gas carrier, the walkway is partially provided as necessary, for example, only at the central portion in the longitudinal direction of the tank cover.
Thereby, the hull weight and manufacturing cost by installing a walkway can be reduced, and the work process required for installing a walkway can be reduced.

In the liquefied gas carrier, a height H (m) from the ship bottom to the upper surface of the walkway is higher than a height D (m) +2 (m) from the ship bottom to the upper surface of the upper deck, and 40 (m It is more preferable that the height is set so that all of the gangway ladders installed at the terminal scheduled to be docked can be bridged.
“Terminal scheduled to berth” means a terminal where the vessel is scheduled to berth after service and / or a new terminal that has already been in service due to a change of route, etc. I mean.

According to such a liquefied gas carrier, the height from the bottom of the ship to the upper surface of the walkway (that is, the height from the upper surface of the upper deck to the upper surface of the walkway) was installed at the terminal where berthing was planned. Since the gangway ladder is built over the upper surface of the walkway that is arranged according to the movable range of the gangway ladder, even if the upper deck is arranged at a low position, berthing is scheduled All the gangway ladders installed in the terminal can be bridged, and the compatibility with the gangway ladder installed in the terminal can be improved.

According to the liquefied gas carrier according to the present invention, even when the upper deck is arranged at a low position, it is possible to bridge all of the gangway ladders installed at the terminal scheduled to berth. .

It is a right view of the liquefied gas carrier ship which concerns on 1st Embodiment of this invention. It is a top view of the liquefied gas carrier ship concerning a 1st embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1A. 1 is a view of a liquefied gas carrier ship according to a first embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG. 1A. FIG. 2 is a view of the liquefied gas carrier ship according to the first embodiment of the present invention, and is a cross-sectional view taken along the line BB in FIG. 1A. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 1A. It is a right view of the liquefied gas carrier ship which concerns on 2nd Embodiment of this invention. It is a top view of the liquefied gas carrier ship concerning a 2nd embodiment of the present invention.

Hereinafter, a first embodiment of a liquefied gas carrier according to the present invention will be described with reference to FIGS. 1A to 4.
1A and 1B are views of a liquefied gas carrier ship according to the present embodiment, in which FIG. 1A is a right side view and FIG. 1B is a plan view. 2 is a cross-sectional view taken along arrow II-II in FIG. 1A. 3A and 3B are views of the liquefied gas carrier ship according to the present embodiment. FIG. 3A is a cross-sectional view taken along the line AA in FIG. 1A, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 4 is a cross-sectional view taken along arrows IV-IV in FIG. 1A.

As shown in FIG. 1A, FIG. 1B, and FIG. 3A, a liquefied gas carrier ship (“LNG ship” in this embodiment) 1 according to this embodiment includes, for example, four aluminum spherical tanks (“Moss type spherical shape”). 2), each of these aluminum spherical tanks 2 can store liquefied gas (natural gas liquefied at a low temperature in the present embodiment) therein. It is comprised as follows.
Further, as shown in FIG. 2, these spherical tanks 2 are respectively connected via a cylindrical skirt 3 whose upper end is fixed to the equator of the spherical tank 2 and whose lower end is fixed on the foundation deck 4. It is supported by the hull 5. That is, the weight of these spherical tanks 2 is received by the hull 5 through the skirt 3.

Further, as shown in FIGS. 1A, 1B, and 2, the upper half of these spherical tanks 2 is fixed on the upper deck 6 along the bow-tail direction and the ship width direction. It is covered by a continuous tank cover 7 that extends. Further, no expansion joint is provided between the tank cover 7 and the upper deck 6, and the tank cover 7 has a rigid structure. That is, the tank cover 7, together with the hull 5, is a bending force generated by its own weight, cargo to be loaded, and wave force with respect to the longitudinal strength of the ship required by the rules of the classification society (head-to-tail direction (vertical direction)). And strength against shearing force).
In addition, the code |

symbols

8 and 9 in FIG. 2 have shown the vertical partition and the ship side outer plate, respectively.

As shown in FIG. 1A to FIG. 4, a plurality (17 in this embodiment) of ballast tanks 10 are provided on the bottom of the hull 5 along the bow-stern direction and the ship width direction.
Among these ballast tanks 10, the ballast tanks 10 other than the ballast tank 10 arranged at the position closest to the bow are arranged along the circumferential direction of the spherical tank 2 and surrounding the upper part of the spherical tank 2. The upper part and the lower part arrange | positioned along the ship's side outer plate | board 9 and the ship bottom (boat bottom outer plate | board) 11 of the hull 5 in the bow-stern direction are provided.

Now, as shown in FIGS. 1A, 1B, 2 and 4, on the port side and starboard side of the liquefied gas carrier ship 1 according to the present embodiment, a walkway (passage) 20 along the ship side skin 9. There is one each.
The walkway 20 is used as a passage through which a gangway ladder (a ladder on the shore side) installed at a terminal (not shown) berthed to perform a cargo handling work is bridged and a crew and workers come and go. It plays a role.

As shown in FIGS. 2 and 4, the walkway 20 includes a walk deck 21 extending outward from the side surface 7 a of the tank cover 7, and a vertically upward direction from the upper deck 6 (or an obliquely upward direction from the side surface 7 a of the tank cover 7). ) And a plurality of support members 22 that support the lower surface of the walk deck 21.
As shown in FIGS. 1A and 1B, the walkway 20 extends from the front surface of the house (residential area) 23 to the front end of the side surface 7 a of the tank cover 7 along the corresponding ship side skin 9. Further, at both ends of the walk deck 21 (the left end and the right end in FIGS. 1A and 1B), stairs for descending on the upper deck 6 from the walk deck 21 or climbing on the walk deck 21 from the upper deck 6 (Not shown) are respectively attached.

The height (vertical distance) H (m) from the bottom 11 to the upper surface of the walk deck 21 is larger than the height D (m) +2 (m) from the bottom 11 to the upper surface of the upper deck 6; It is set to a height within a range smaller than m) and capable of bridging all gangway ladders installed at the terminal that is scheduled to arrive (after service).

According to the liquefied gas carrier 1 according to the present embodiment, the gangway ladder is bridged on the upper surface of the walkway 20 that is arranged in accordance with the movable range of the gangway ladder installed at the terminal scheduled to be docked. Therefore, even when the upper deck 6 is placed at a low position, all of the gangway ladders installed at the terminal that is scheduled to berth can be bridged, and the gang installed at the terminal The adaptability to the way ladder can be improved.

Further, since the mooring metal fittings are arranged on the upper deck 6 located below the walk deck 21 in the same manner as in the past, the mooring metal fittings protrude upward from the upper surface of the walk deck 21. This can be avoided and the trafficability on the walk deck 21 can be improved.

In addition, one continuous tank cover 7 covering the upper half of the spherical tank 2 is rigidly connected to the hull 5 and, together with the hull 5, ensures the vertical strength of the ship as required by the rules of the classification society. Therefore, the width of the hull 5 can be reduced by about 2% to 4%, the hull resistance and the hull weight can be reduced, the navigation performance can be improved, and the hull 5 can be improved. The total amount of the material (for example, steel materials) which comprises can be reduced, and the construction cost can be reduced.

Furthermore, as shown in FIG. 4, the upper parts of the ballast tanks 10 are arranged along the circumferential direction of the spherical tank 2 and surrounding the upper part of the spherical tank 2. In addition, it can be used as a part of the skirt 3 that supports the spherical tank 2, the total amount of the material constituting the skirt 3 can be reduced, and the construction cost can be reduced.

In the above-described embodiment, the description has been given of the case where the rear end of the walkway 20 extends to the front surface of the house 23, but the present invention is not limited to this, and the rear end of the walkway 20 is However, for example, the walkway 20 extending to the side surface of the house 23 may be employed.
Then, the rear end of the walkway 20 and a certain level (for example, 2nd Deck) in the house 23 are connected via a waterproof door (not shown) so that the house can be moved back and forth. The convenience to the walkway 20 from within 23 or from the walkway 20 to the house 23 can be improved.

Conventionally, the electric wires arranged in the space formed below the upper deck 6 (the space surrounded by the foundation deck 4, the upper deck 6, the longitudinal partition wall 8, and the ship side outer plate 9), When oil pipes, water pipes, fire extinguishing pipes, compressed air pipes, etc. are arranged in an open space formed below the walk deck 21 (a space formed between the walk deck 21 and the upper deck 6). Further preferred.
As a result, maintenance / inspection work for electric wires, oil piping, water piping, fire extinguishing piping, compressed air piping, and the like can be easily performed, and maintainability can be improved.

A second embodiment of the liquefied gas carrier according to the present invention will be described with reference to FIGS. 5A and 5B.
5A and 5B are views of the liquefied gas carrier ship according to the present embodiment, in which FIG. 5A is a right side view and FIG. 5B is a plan view.

As shown in FIGS. 5A and 5B, the liquefied gas carrier ship 31 according to this embodiment is described above in that the walkway 20 described in the first embodiment is provided within the minimum necessary range. Different from that of the first embodiment. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.

As shown in FIGS. 5A and 5B, the walkway 20 according to the present embodiment has a tank cover 7 in the longitudinal direction (the bow-tail direction: the left-right direction in FIGS. 5A and 5B) only, more specifically, the bow. Only the side surface 7a of the tank cover 7 located on both sides of the second spherical tank (hereinafter referred to as “No. 2 tank”) and the third spherical tank (hereinafter referred to as “No. 3 tank”) from the side. Is provided.

According to the liquefied gas carrier 31 according to this embodiment, the walkway 20 is No. Side face 7a of the tank cover 7 located on both sides of the two tanks, and No. 2 Since the tank cover 7 located on both sides of the three tanks is partially provided on the side surface 7a as necessary, the hull weight and the manufacturing cost are increased by installing the walkway 20 in the first embodiment. The work process required to install the walkway 20 can be reduced to about half that of the first embodiment.

In addition, since the gangway ladder is bridged over the upper surface of the walkway 20 arranged in accordance with the movable range of the gangway ladder installed at the terminal scheduled for landing, the upper deck 6 Even when placed at a low position, all gangway ladders installed at terminals scheduled to berth can be bridged over, and the compatibility with the gangway ladders installed at the terminals will be good. be able to.

Further, since the mooring brackets are arranged on the upper deck 6 located below the walk deck 21 (see FIG. 2 or 4) in the same manner as in the prior art, Thus, it is possible to prevent the mooring bracket from protruding, and to improve the trafficability on the walk deck 21.

Furthermore, a single continuous tank cover 7 covering the upper half of the spherical tank 2 is rigidly connected to the hull 5 and, together with the hull 5, provides the vertical strength of the ship required by the rules of the classification society. Since the structure is secured, the width of the hull 5 can be reduced by about 2% to 4%, the hull resistance and the hull weight can be reduced, and the navigation performance can be improved. 5 can reduce the total amount of materials (for example, steel materials) constituting 5 and can reduce the construction cost.

In addition, this invention is not limited to embodiment mentioned above, For example, in the embodiment mentioned above, the wall part (spherical tank 2) which comprises the inner peripheral surface of the skirt 3 and the upper part of the ballast tank 10 (formation). Wall portion 12) (see FIG. 2) is positioned on the same plane, and the skirt 3 and the wall portion 12 are formed of the same member. The present invention can be modified and changed as necessary without departing from the technical idea of the present invention.

In the above-described embodiment, the upper half of the four spherical tanks 2 is covered with one continuous tank cover 7 extending along the bow-stern direction and the ship width direction. The present invention is not limited to such a configuration, and the present invention can be applied to a configuration having four tank covers corresponding to each spherical tank 2.

Furthermore, in the second embodiment described above, the walkway 20 is No. No. 1 on each side surface 7a of the tank cover 7 located on both sides of the two tanks. A total of four are provided, one on each side surface 7a of the tank cover 7 located on both sides of the three tanks. However, the present invention is not limited to this, and the position (location) where the walkway 20 is provided and the number of the walkways 20 depend on the gangway ladder installed at the terminal where the landing is scheduled. Design items that can be selected as appropriate. Therefore, the walkway 20 is, for example, No. 2 tanks or no. A total of two tank covers 7 may be provided, one on each side surface 7a of the tank cover 7 located on both sides of the three tanks. 2 tanks and No. You may make it provide a total of six or more at least three each in the side surface 7a of the tank cover 7 located in the both sides of 3 tanks. No. 2 tanks or no. Not only 3 tanks, but no. 1 tank (1st spherical tank from the bow side) or No. You may make it provide the walkway 20 in the side surface 7a of the tank cover 7 located in the both sides of 4 tanks (4th spherical tank from the bow side).

DESCRIPTION OF SYMBOLS 1 liquefied gas carrier 2 spherical tank 3 skirt 5 hull 6 upper deck 7 tank cover 7a side surface 9 ship side skin 11 bottom 20 walkway 31 liquefied gas carrier

Claims

A plurality of spherical tanks that store liquefied gas inside and are arranged along the fore-and-aft direction and fixed to the hull through skirts;
A liquefied gas carrier ship that covers the upper half of these spherical tanks and includes one or a plurality of tank covers that extend along the bow-stern direction and the ship width direction,
A walkway is installed above the upper deck located between the side of the tank cover and the ship side shell, over which the gangway ladder installed at the terminal docked to carry out cargo handling work. A liquefied gas carrier characterized by
The liquefied gas carrier ship according to claim 1, wherein the walkway extends continuously from the front of the residential area to the front end of the side surface of the tank cover.
The walkway is partially provided in a place suitable for bridging the gangway ladder between a front surface of a residential area and a front end of a side surface of the tank cover. The liquefied gas carrier described in 1.
The height H (m) from the ship bottom to the upper surface of the walkway is greater than the height D (m) + 2 (m) from the ship bottom to the upper surface of the upper deck, and is less than 40 (m) And the height is set so that all of the gangway ladders installed at the terminal scheduled to berth can be bridged over. Liquefied gas carrier.