JP2020514160A - Gas fuel propelled container carrier - Google Patents

Abstract

A gas fuel propelled container carrier according to one embodiment of the present invention includes a liquefied gas storage tank provided below a cabin and storing liquefied gas, and a cofferdam provided between the liquefied gas storage tank and a hull, The cofferdam is provided between the upper wall and the upper deck of the liquefied gas storage tank and between the side wall of the liquefied gas storage tank and the ship-side outer plate, and is spaced inward as compared with the ship-side outer plate, It is characterized in that it is omitted between the lower wall and the bottom plate.

Description

  The present invention relates to a gas fuel propelled container carrier.

  Vessels are means of transportation for navigating the ocean with a large amount of minerals, crude oil, natural gas, or thousands of containers, etc., and are made of steel.The propellers float on the water surface due to buoyancy. It moves by the thrust generated through the rotation of.

  The ship generates thrust by driving the engine, and at this time, the engine uses gasoline or diesel to move the piston, and the reciprocating motion of the piston causes the crankshaft to rotate to connect to the crankshaft. It was common for a shaft to rotate and drive a propeller.

  However, when heavy oil such as HFO or MFO is used as a propellant, when burning heavy oil or the like, environmental pollution due to various harmful substances contained in exhaust gas is severe, and regulations on environmental pollution are tightened. As regulations on propulsion devices that use heavy oil as fuel oil have also been tightened, the cost to meet the regulations is gradually increasing.

  For this reason, as a fuel for ships, liquefied natural gas (liquefied natural gas) or liquefied petroleum gas (liquefied gas) has been replaced by gasoline and diesel due to recent technological developments, instead of using heavy oil or using only a minimum amount. Liquefied gas such as Petroleum Gas) is used for technological development.

  Liquefied natural gas is liquefied by cooling methane obtained by refining natural gas collected from a gas field. It is a colorless and transparent liquid with almost no pollutant and high calorific value. It is fuel. On the other hand, liquefied petroleum gas is a fuel obtained by compressing a gas containing propane (C3H8) and butane (C4H10) as main components, which are discharged together with petroleum from an oil field, at room temperature into a liquid. Like liquefied natural gas, liquefied petroleum gas is colorless and odorless, and is widely used as a fuel for domestic use, commercial use, industrial use, automobile use, and the like.

  The liquefied gas is stored in a liquefied gas storage tank installed on the ground or in a liquefied gas storage tank provided in a ship that is a transportation means for sailing in the ocean. Since the volume of liquefied petroleum gas is reduced to 1/600 and liquefied petroleum gas is reduced to 1/260 and Bhutan to 1/230 by liquefaction, there is an advantage of high storage efficiency.

  The liquefied gas is supplied to various customers and used. Recently, an LNG fuel supply system has been developed in which an LNG carrier that carries liquefied natural gas uses LNG as a fuel to drive an engine. As described above, the method of using LNG as a fuel for an engine has been increasingly applied to ships other than LNG carriers.

  Along with this, container carriers are also installing an engine that consumes liquefied gas to improve fuel efficiency, reduce exhaust gas, and improve operating efficiency.

  The present invention was created to improve the conventional technology, and provides a gas fuel-propelled container carrier ship that is capable of propelling liquefied gas as fuel and has an optimized structure for using liquefied gas as fuel. It is for doing.

  The gas fuel propelled container carrier according to the present invention includes a liquefied gas storage tank provided below the cabin and storing liquefied gas, and a cofferdam provided between the liquefied gas storage tank and the hull, and the cofferdam is It is provided between the upper wall of the liquefied gas storage tank and the upper deck and between the side wall of the liquefied gas storage tank and the outer shell of the liquefied gas, and is spaced inward as compared with the outer shell of the liquefied gas, and the lower wall of the liquefied gas storage tank and the bottom of the ship. It is characterized in that it is omitted between the plates.

  Specifically, ballast tanks provided on the left and right of the hull may be further included.

  Specifically, the cofferdam may be provided between a sidewall of the liquefied gas storage tank and the ballast tank.

  Specifically, the cofferdam may be provided such that the inside thereof communicates with a double bottom structure between the lower wall of the liquefied gas storage tank and the ship bottom plate.

  Specifically, the cofferdam may be provided with an opening for communicating with the double bottom structure at a lower end of a portion surrounding a side wall of the liquefied gas storage tank.

  Specifically, the cofferdam may have an inverted U-shape that surrounds the liquefied gas storage tank with reference to a normal cross section.

  Specifically, it may further include an oil storage tank provided between the liquefied gas storage tank and the ballast tank.

  Specifically, the double bottom structure may be provided so as to be separated from the ballast tank.

  Since the gas fuel propelled container carrier according to the present invention uses an engine that uses liquefied gas as a fuel instead of gasoline or diesel, it has the effects of improving fuel efficiency, reducing exhaust gas emissions, and improving operating efficiency. is there.

  Further, in the gas fuel propelled container carrier according to the present invention, by optimizing the structure or the like for supplying the liquefied gas to the engine, it is possible to improve the stability and safety and improve the satisfaction of the shipowner. it can.

1 is a side view of a gas fuel propelled container carrier according to a first embodiment of the present invention. 1 is a front sectional view of a gas fuel propelled container carrier according to a first embodiment of the present invention. FIG. 1 is a plan sectional view of a gas fuel propelled container carrier according to a first embodiment of the present invention. 1 is a front sectional view of a gas fuel propelled container carrier according to a first embodiment of the present invention. FIG. 1 is a side sectional view of a gas fuel propelled container carrier according to a first embodiment of the present invention. 1 is a front sectional view of a gas fuel propelled container carrier according to a first embodiment of the present invention. 1 is a perspective view of a bunker station of a gas fuel propelled container carrier according to a first embodiment of the present invention. FIG. 6 is a front sectional view of a gas fuel propelled container carrier according to a second embodiment of the present invention. FIG. 7 is a front sectional view of a gas fuel propelled container carrier according to a third embodiment of the present invention.

  Objects, particular advantages and novel features of the present invention will be further clarified by the following detailed description and preferred embodiments in connection with the accompanying drawings. In the present specification, when assigning reference numerals to the constituent elements in each drawing, it should be noted that the same constituent elements are denoted by the same reference numerals as much as possible even if they are shown in other drawings. Is. Further, in describing the present invention, a detailed description thereof will be omitted when it is determined that a detailed description of related known techniques unnecessarily obscure the subject matter of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, hereinafter, the liquefied gas can be used to mean all gas fuels generally stored in a liquid state, such as LNG or LPG, ethylene, and ammonia.

  In addition, the liquefied gas may be used not only in a liquid state but also in a meaning including a gas state, a supercritical state, a supercooled state, and the like for convenience. That is, for the sake of convenience, it can be expressed as a liquefied gas even when it is not in a liquid state due to factors such as heating, pressurization, and natural vaporization.

  1 is a side view of a gas fuel propelled container carrier according to a first embodiment of the present invention, FIG. 2 is a front sectional view of a gas fuel propelled container carrier according to the first embodiment of the present invention, and FIG. FIG. 2 is a plan sectional view of a gas fuel propelled container carrier according to the first embodiment of FIG.

  4 is a front sectional view of the gas fuel propelled container carrier according to the first embodiment of the present invention, and FIG. 5 is a side sectional view of the gas fuel propelled container carrier according to the first embodiment of the present invention.

  6 is a front sectional view of a gas fuel propelled container carrier according to the first embodiment of the present invention, and FIG. 7 is a perspective view of a bunker station of the gas fuel propelled container carrier according to the first embodiment of the present invention.

  1 to 7, a gas fuel propelled container carrier 1 according to a first embodiment of the present invention includes a hull 10, a liquefied gas storage tank 20, a cofferdam 30, an oil storage tank 40, a ballast tank 50, and a fuel supply chamber 60. , A bunker station 70, a transformer room 80 (TR), and a vent mast 90.

  The hull 10 forms the exterior of the gas fuel propelled container carrier 1. The hull 10 is surrounded by an upper deck 11, a ship-side outer plate 12, and a ship bottom plate 13, and a bow 14 is provided at the front and a stern 15 is provided at the rear in the front-rear direction.

  The bow 14 is provided with a spherical bow (not shown) to reduce wave resistance, and the stern 15 is provided with a propeller (not shown) and a ladder (not shown) for navigation and turning. Embody.

  The hull 10 has a double bottom structure 13a. That is, since the partition wall is further provided between the ship bottom plate 13 and the space containing the liquefied gas, the liquefied gas is not leaked unless at least two walls are broken.

  The internal structure of the hull 10 will be described below.

  A container C can be loaded inside the hull 10. Therefore, a plurality of holds H are provided inside the hull 10 in the front-rear direction. A cell guide (not shown) is provided in the hold H to guide the loading of the containers C.

  A partition (not shown) of a partially open type is provided in the hold H to divide a plurality of bays (not shown) forming the hold H. That is, the hold H may include at least two bays in the front-rear direction, and each bay is separated by the partition wall. At this time, the partially open type partition may be provided so as to be separated between the two bays, and the space between the partitions may be referred to as a gap portion G.

  Each of the plurality of holds H has a closed partition wall (reference numeral is not shown) in the front-rear direction, and a gap G is formed between the holds H. That is, the front partition wall of any one of the holds H and the rear partition wall of the hold H provided in front of it may be separated from each other, and the deck D strip that is horizontally placed in the separated gap G. (Not shown) or the like may be arranged.

  A hatch combing M is provided above the hold H. The hatch coaming M may be a frame projecting upward around the entrance of the hold H, or may be a structure for covering the hatch cover V.

  By placing the hatch cover V on the hatch combing M, the hold H can be sealed from the outside. However, the hatch cover V may not be connected to the hatch coaming M, but may be simply mounted.

  A staircase portion B is provided inside the hold H. When the hull 10 is viewed from the front, the lower left end and the lower right end form a curved line. Therefore, in order to load the container C in the hold H as much as possible, the hold H has a rectangular shape or a square shape. In addition, stairs must be provided on the left and right of the hold H.

  At this time, the width and height of the staircase portion B can be determined according to the standard of the width of the container C, and the position and shape of the staircase portion B may be varied between the bow 14 and the stern 15. This is because the lower part of the front cross section of the hull 10 becomes gradually narrower from the central part toward the bow 14 and the stern 15. Therefore, the staircase portion B may be moved inward from the central portion of the hull 10 toward the bow 14 or the stern 15, or may further protrude inward.

  That is, the position or shape of the staircase portion B changes between the bow 14 and the stern 15 depending on the hull form of the hull 10. A ballast tank 50 may be provided between the staircase portion B and the hull 10, but the position and shape of the staircase portion B can be changed in the front-back direction of the hull 10, so the position and shape of the ballast tank 50 can also be changed. You can

  An engine room R may be provided in a position adjacent to the stern 15 inside the hull 10. A propulsion engine (not shown) is housed in the engine room R, and the propulsion engine is mechanically or electrically connected to the propeller and consumes liquefied gas as fuel to implement the rotation of the propeller.

  A liquefied gas storage tank 20 may be housed in the lower portion of the cabin A in the central portion of the hull 10. At this time, the liquefied gas storage tank 20 may be provided directly below the cabin A, or may be surrounded by the cofferdam 30.

  The facilities provided on the upper deck 11 of the hull 10 will be described below.

  A cabin A is provided on the upper deck 11 of the hull 10. The cabin A is a living space for passengers and may be divided into a plurality of layers such as A deck D, B deck, and C deck as shown in the drawing in the vertical direction. A cockpit to control may be provided.

  The cabin A may be provided in the central portion of the boat 10, and the cross section of the boat 10 in the portion where the cabin A is provided has the maximum size. The hull 10 has a maximum-sized central cross section in the central portion between the bow 14 and the stern 15, and the central cross section may be extended back and forth by a certain length.

  The cabin A may not be provided directly on the upper deck 11, but may be provided above the fuel supply chamber 60 provided on the upper deck 11. That is, in the central portion of the hull 10, the cabin A, the fuel supply chamber 60, and the liquefied gas storage tank 20 may be vertically arranged, and the fuel supply chamber 60 will be described later.

  An engine casing I is provided behind the cabin A on the upper deck 11 of the hull 10. The engine casing I has a chimney for discharging the exhaust gas generated by the propulsion engine to the outside, and can also form a space in which an emergency generator, a fire extinguishing facility and the like are provided.

  A container C may be loaded on a portion of the upper deck 11 of the hull 10 excluding the cabin A and the engine casing I. In order to load the containers C, the upper deck 11 is provided with lashing bridges L which are spaced apart by a certain distance in the front-rear direction.

  The lashing bridge L is provided in front of and behind the container C, and is used for lashing the containers C stacked in a plurality of layers. The lashing bridge L may be provided at a position separated from the cabin A before and after the cabin A, and may be arranged so as to be supported independently of the cabin A.

  However, as will be described later, although the cabin A is supported by the upper deck 11 by the fuel supply chamber 60, the cofferdam 30 is provided below the upper deck 11, and the height of the cofferdam 30 is equal to the volume of the liquefied gas storage tank 20. The height is smaller than the height of the fuel supply chamber 60 in order to secure it.

  In this case, even if a girder member 34, which will be described later, is provided in the cofferdam 30 to reinforce the support strength of the cabin A, the height of the girder member 34 is not sufficient, and therefore the structural strength of the cabin A may not be sufficient. is there.

  Therefore, in this embodiment, the connecting portion 16 that connects the lashing bridge L, which is supported independently of the cabin A, to the cabin A is provided, and the cabin A is not limited to the upper deck 11 even if the height of the girder member 34 is not sufficient. It can be stably supported on.

  At this time, the connecting portion 16 may be arranged vertically side by side with the girder member 34. Therefore, the connection part 16 and the girder member 34 are linked as if they were one member penetrating the upper deck 11, so that the stability of the cabin A can be improved.

  The connecting portion 16 may have a through hole 16a formed in the left-right direction. At this time, the through-hole 16a may be configured to allow a crew member to pass through, a plurality of through-holes 16a may be provided above and below, and the portion where the through-hole 16a is provided is on the deck D of the cabin A. It may be the corresponding position.

  The lashing bridge L may be provided with a socket S that is connected to the container C and supplies electric power. At this time, the socket S may be connected to the refrigeration container C to supply electric power. However, the socket S connected to the freezing container C may be provided behind the container C. In this case, the socket S may not be provided in the lashing bridge L (for example, the lashing bridge L provided behind the cabin A or the engine casing I) in which the container C is not loaded in the front.

  Stools T may be provided on the left and right of the hatch cover V on the upper deck 11. When the hatch combing M and the hatch cover V are provided, a difference in height occurs between the upper surface of the upper deck 11 and the upper surface of the hatch cover V, but the hatch cover V has a width relatively narrower than the width of the hull 10. In order to load the containers C on the left and right ends of the hatch cover V, it is necessary to eliminate the height difference.

  Therefore, a plurality of stools T can be provided on the hull 10 in the front-rear direction on the upper deck 11 in a position adjacent to the ship-side skin 12 or adjacent to the ship-side skin 12. The placed container C may be supported by the hatch cover V on the inside and the stool T on the outside.

  The liquefied gas storage tank 20 stores liquefied gas. At this time, the liquefied gas may be gas fuel consumed by the propulsion engine to operate the gas fuel propelled container carrier 1.

  The liquefied gas storage tank 20 stores the liquefied gas in a liquid state. For this reason, the liquefied gas storage tank 20 can store the liquefied gas in an extremely low temperature state, and the liquefied gas storage tank 20 has various liquefied gas storage tanks 20 in order to prevent the liquefied gas from spontaneously vaporizing and changing to evaporative gas. A heat insulating structure may be adopted.

  The liquefied gas storage tank 20 may be a membrane type or an independent type, but the form of the liquefied gas storage tank 20 is not particularly limited. The liquefied gas storage tank 20 stores the liquefied gas at a pressure of 1 to 10 bar, but the storage pressure of the liquefied gas storage tank 20 is not particularly limited.

  A dome 21 is provided above the liquefied gas storage tank 20. The dome 21 is a portion that connects the inside and the outside of the liquefied gas storage tank 20, and the gas fuel line 62 may penetrate the dome 21.

  The liquefied gas storage tank 20 may be provided inside the hull 10 below the upper deck 11, but the dome 21 of the liquefied gas storage tank 20 may be provided so that at least a part thereof penetrates the upper deck 11. .. Therefore, the gas fuel line 62 penetrating the dome 21 may not be provided in the lower portion of the upper deck 11 and may extend from the upper portion of the upper deck 11.

  At the position where the liquefied gas storage tank 20 is provided, the upper deck 11 may be provided with the fuel supply chamber 60, and the upper part of the fuel supply chamber 60 may be provided with the cabin A. That is, the liquefied gas storage tank 20 may be located below the cabin A.

  However, since the liquefied gas storage tank 20 is configured to contain a hazardous substance, in order to realize heat insulation while protecting the cabin A and the like from the liquefied gas storage tank 20, the cofferdam 30 surrounds the liquefied gas storage tank 20. You may be surrounded.

  An inspection platform for inspecting the outer wall of the liquefied gas storage tank 20 may be provided around the liquefied gas storage tank 20. The inspection platform may be a horizontal member 35 described later, and a plurality of horizontal members 35 may be arranged vertically.

  The liquefied gas storage tank 20 may have a shape in which the front and rear widths are relatively smaller than the left and right widths. The front and rear width of the liquefied gas storage tank 20 can correspond to the front and rear width of the cabin A. That is, the space between the partition walls provided side by side with the front and rear of the cabin A can be a space for housing the liquefied gas storage tank 20.

  When the front-back width of the liquefied gas storage tank 20 is larger than the front-back width of the cabin A, the liquefied gas storage tank 20 invades the hold H before and after the cabin A to reduce the loading capacity of the container C. You can Therefore, the front and rear width of the liquefied gas storage tank 20 can be limited to correspond to the front and rear width of the cabin A.

  However, in order to guarantee the cruising distance of the gas fuel propelled container carrier 1, it is necessary to secure a sufficient capacity of the liquefied gas storage tank 20. Therefore, in the present embodiment, the liquefied gas storage tank 20 can have a larger width in the left-right direction than in the front-rear width to ensure the volume.

  Further, the liquefied gas storage tank 20 may also have a height larger than the front and rear widths so that the liquefied gas storage tank 20 does not invade the loading space of the container C but stores the gas fuel necessary for operation. it can.

  However, when the liquefied gas storage tank 20 is provided as a stand-alone type, stability may be a problem when the hull 10 is pitched. However, in the present embodiment, the choke 33a is provided on the inner wall 32 of the cofferdam 30 at the front and rear. The pitching of the liquefied gas storage tank 20 can be controlled.

  The cofferdam 30 is provided between the liquefied gas storage tank 20 and the hull 10. The cofferdam 30 is provided in contact with the lower surface of the upper deck 11 between the upper wall of the liquefied gas storage tank 20 and the upper deck 11, and is provided between the side wall of the liquefied gas storage tank 20 and the outer shell 12 of the ship. May be.

  At this time, the liquefied gas storage tank 20 has a height from the double bottom structure 13 a of the hull 10 to the lower end of the cofferdam 30. Here, the height of the liquefied gas storage tank 20 is the height formed by the membrane type liquefied gas storage tank 20, or a support and a choke 33a are installed at the height of the independent liquefied gas storage tank 20. It means the sum of the heights for.

  That is, between the above-mentioned double bottom structure 13a and the lower end of the cofferdam 30, it is not necessary to provide a separate space or structure other than the wall structure of the liquefied gas storage tank 20, the choke 33a, and the support.

  Therefore, since the liquefied gas storage tank 20 can have the maximum height while ensuring safety inside the hull 10, the present embodiment can ensure the operation of the gas fuel propelled container carrier 1. In addition, the volume of the liquefied gas storage tank 20 can be expanded. Further, in order to secure the volume of the liquefied gas storage tank 20, the cofferdam 30 may have a height relatively smaller than the height of the fuel supply chamber 60.

  When the liquefied gas storage tank 20 is provided as a membrane type, the cofferdam 30 may be omitted between the lower wall of the liquefied gas storage tank 20 and the ship bottom plate 13. In this case, the cofferdam 30 does not include the liquefied gas storage tank 20. It can have an inverted U-shape that surrounds it. That is, only the double bottom structure 13a is provided between the lower wall of the liquefied gas storage tank 20 and the ship bottom plate 13, and the cofferdam 30 may not be provided.

  At this time, the cofferdam 30 may be installed such that the inside thereof communicates with the double bottom structure 13 a between the lower wall of the liquefied gas storage tank 20 and the ship bottom plate 13, and thus, the liquefied gas storage tank 20 is provided. An opening 31 for communicating with the double bottom structure 13a may be provided at the lower end of the portion surrounding the side wall.

  Therefore, in the liquefied gas storage tank 20, the upper wall and the side wall may be surrounded by the cofferdam 30, and the lower wall may be surrounded by the double bottom structure 13a. Here, the opening 31 may be provided so that the cofferdam 30 and the double bottom structure 13a are always in communication with each other.

  Further, the cofferdam 30 may be provided so as to be spaced inward as compared with the ship side outer plate 12, and an oil storage tank 40 and a ballast tank 50 may be provided on the outer side of the cofferdam 30 in the left-right direction.

  The ballast tank 50 is provided on the left and right sides of the hull 10 so as to abut the ship side outer plate 12, the cofferdam 30 is provided between the side wall of the liquefied gas storage tank 20 and the ballast tank 50, and the oil storage tank 40 is the liquefied gas storage tank. It may be provided between 20 and the ballast tank 50.

  That is, in the present embodiment, the ballast tank 50, the oil storage tank 40, the cofferdam 30, and the liquefied gas storage tank 20 may be arranged toward the inside of the ship-side skin 12, and in this case, the liquefied gas may be arranged. Even if the outer shell 12 of the storage tank 20 is damaged, leakage can be prevented by the ballast tank 50, the oil storage tank 40, and the cofferdam 30.

  The double bottom structure 13a described above may be provided so as to be isolated from the ballast tank 50. Since the double bottom structure 13a is a space that communicates with the cofferdam 30, it is a space in which leakage of the liquefied gas is primarily blocked. Therefore, since the ballast tank 50 secondarily blocks the leakage of the liquefied gas, the ballast tank 50 can form a space isolated from the double bottom structure 13 a and the cofferdam 30.

  In the cofferdam 30, a girder member 34 may be vertically provided between the upper wall of the liquefied gas storage tank 20 and the hull 10. The girder member 34 is provided on the lower surface of the upper deck 11 and may have an inverted T-shaped cross section.

  The girder member 34 may be housed in the cofferdam 30, the upper end of which may be coupled to the lower surface of the upper deck 11 and the lower end of which may be coupled to the upper wall of the liquefied gas storage tank 20 in the cofferdam 30. A plurality of girder members 34 may be arranged in the left-right direction.

  The girder member 34 may be provided with the connecting portions 16 to be described later arranged side by side. Since the cofferdam 30 can have a height relatively smaller than the height of the fuel supply chamber 60, even if the girder member 34 is provided in the cofferdam 30, the cabin A provided at the upper portion of the upper deck 11 can be supported. May not be enough. Therefore, in order to reinforce the support strength of the cabin A, the connecting portion 16 may be added in a position aligned with the girder member 34 so that the lashing bridge L is used as a structure supporting the cabin A. This is as described above.

  When the liquefied gas storage tank 20 is provided as a stand-alone type, the inner wall 32 of the cofferdam 30 facing the liquefied gas storage tank 20 may be provided with a choke 33a for supporting the front and rear of the liquefied gas storage tank 20. Since the liquefied gas storage tank 20 has a shape in which the front and rear widths are relatively smaller than the height and the left and right widths, it can be vulnerable to pitching of the hull 10. Therefore, in this embodiment, the choke 33a may be provided on the front inner wall 32 and the rear inner wall 32 of the liquefied gas storage tank 20 of the inner wall 32 of the cofferdam 30, and the pitching of the liquefied gas storage tank 20 may be controlled through the choke 33a.

  Of course, since the choke 33a may be provided on the left and right inner walls 32 of the liquefied gas storage tank 20 among the inner walls 32 of the cofferdam 30, the choke 33a may be provided to control the pitching or rolling of the liquefied gas storage tank 20. Good.

  The choke 33 a may have a height larger than the gap between the inner wall 32 of the cofferdam 30 and the outer wall of the liquefied gas storage tank 20. That is, the choke 33 a may have a height larger than the width of the front and rear of the cofferdam 30. In this case, the cofferdam 30 is provided with a depression 33 in order to install the choke 33a.

  The depression 33 is depressed toward the outside of the liquefied gas storage tank 20 to accommodate at least a part of the choke 33 a on the inner wall 32 of the cofferdam 30. The depth of depression of the depression 33 may be the height of the choke 33a minus the width in front of and behind the cofferdam 30.

  As described above, the horizontal member 35 is provided around the liquefied gas storage tank 20, but the horizontal member 35 is provided vertically in the cofferdam 30 and protrudes from the inner wall 32 of the cofferdam 30 toward the liquefied gas storage tank 20. And is used as an inspection platform for the liquefied gas storage tank 20.

  The horizontal member 35 may be provided on the inner wall 32 surrounding the left and right of the liquefied gas storage tank 20 in the cofferdam 30, one end is fixed to the inner wall 32 of the cofferdam 30, and the other end is separated from the outer wall of the liquefied gas storage tank 20. Can have a left and right width.

  Since the inner wall 32 of the cofferdam 30 is provided vertically, it is necessary to join members provided horizontally to reinforce the structure. Therefore, in this embodiment, the horizontal member 35 is provided on the inner wall 32 of the cofferdam 30 to stably hold the structure of the inner wall 32 of the cofferdam 30.

  The oil storage tanks 40 may be provided on the left and right outer sides of the cofferdam 30, but in the present embodiment, the horizontal member 35 is not provided on the outer wall of the cofferdam 30 facing the inside of the oil storage tank 40, and the liquefied gas is not provided. It may be provided only on the inner wall 32 facing the storage tank 20.

  Therefore, by disposing the horizontal member 35 as described above, the oil storage tank 40 may have a shape without a protruding member inside. In this case, the present embodiment can prevent oil from remaining in the oil storage tank 40.

  That is, in the present embodiment, the vertical horizontal member 35 is provided to reinforce the structure of the inner wall 32 of the cofferdam 30, but the horizontal member 35 is prevented from projecting inside the oil storage tank 40 so that the oil storage tank 40 can be prevented. It is possible to omit the projecting member inside, and use the horizontal member 35 as the inspection platform so that the horizontal member 35 projects toward the liquefied gas storage tank 20, thereby eliminating the need for providing another inspection platform. May be.

  At least part of the gas fuel line 62 may be located in the cofferdam 30. The gas fuel line 62 extends from the dome 21 penetrating the upper deck 11, passes through the fuel supply portion in the fuel supply chamber 60, penetrates the upper deck 11, enters the cofferdam 30, and then extends vertically. You can At this time, the horizontal member 35 has a structure for preventing interference with the gas fuel line 62, and for example, a hole (not shown) through which the gas fuel line 62 penetrates may be formed.

  Then, the gas fuel line 62 may be connected to the line duct 62a at the cofferdam 30 and then extended along the line duct 62a to transfer the liquefied gas between the fuel supply chamber 60 and the propulsion engine.

  The oil storage tank 40 stores oil. The oil storage tanks 40 may be provided on the left and right sides of the liquefied gas storage tank 20, and specifically, can be provided on the left and right outer sides of the cofferdam 30.

  The oil stored in the oil storage tank 40 may be a substance that maintains a liquid phase at room temperature, and the oil may be used as a fuel for a propulsion engine. That is, the oil in the oil storage tank 40 can be supplied to the propulsion engine when the gas fuel is used up or when it is difficult to use the gas fuel.

  The oil storage tank 40 may have a stepped shape at the lower end. The shape of the stairs at the lower end of the oil storage tank 40 may be at least a part of the staircase portion B. Of course, the lower end of the oil storage tank 40 may be provided on a flat surface or a slope, but the oil storage tank 40 may be provided on the left and right of the cofferdam 30 and may be omitted in the portion where the hold H is provided. When the lower end of 40 is not in the form of stairs, the lower end of the oil storage tank 40 and the staircase portion B of the hold H are provided out of alignment so that structural stability may decrease. Therefore, the lower end of the oil storage tank 40 may be formed by a part of the staircase portion B.

  The oil storage tanks 40 may be provided on the left and right sides of the cofferdam 30, or may be provided in the gap G. At this time, the gap G in which the oil storage tank 40 is provided may be the gap G that divides the hold H into the front and the rear in the hull 10 instead of the gap G that divides the bay into the front and the rear in the hold H. .. This is because the gap G that divides the bay into front and rear is formed by an open partition, but the gap G that divides the hold H into front and rear is formed by a closed partition. Of course, since the partition walls before and after the bay are not limited to the open type, the position of the oil storage tank 40 is not limited to the above.

  The ballast tank 50 stores ballast water for keeping the hull 10 in a stable state. The capacity of the ballast water stored in the ballast tank 50 can be changed according to the number of the containers H loaded on the hold H and the upper deck 11.

  For example, when the container C is not (substantially) loaded on the hold H and the upper deck 11 (state of light draft), the ballast tank 50 can be sufficiently filled with ballast water. This can prevent propeller racing and the like.

  On the other hand, when the container C is loaded on the hold H and the upper deck 11 at the maximum / sufficiently (state of full load draft), the ballast tank 50 may not (almost) be filled with the ballast water. As a result, the hull 10 can stably float and sail.

  The ballast tank 50 may be provided in contact with the outer shell 12 of the hull 10. That is, when the ship-side outer plate 12 is damaged, the inside of the ballast tank 50 can communicate with the outside. However, since the ballast water stored in the ballast tank 50 is seawater, marine pollution can be blocked even if the ship-side outer plate 12 is damaged.

  The ballast tanks 50 may be provided on the left and right sides of the oil storage tank 40 in the central portion of the hull 10 in which the liquefied gas storage tank 20 and the cofferdam 30 are provided. Therefore, the ballast tank 50 can protect the oil storage tank 40 from damage to the ship-side outer plate 12. Further, since the liquefied gas storage tank 20 is provided inside the oil storage tank 40 and the cofferdam 30, the ballast tank 50 can also protect the liquefied gas storage tank 20.

  The ballast tank 50 may be provided in contact with the outer shell 12 of the hull 10 or may be provided in the double bottom structure 13a. The ballast tank 50 provided in the double bottom structure 13a and the ballast tank 50 that is in contact with the side shell 12 may communicate with each other or may be formed independently.

  As described above, the step portion B may be provided on the upper side of the ballast tank 50 provided in the double bottom structure 13a, but the ballast tank 50 is omitted in the center of the double bottom structure 13a, and the line duct is provided. 62a may be provided.

  The fuel supply chamber 60 accommodates a fuel supply unit (not shown) that transmits the liquefied gas to the propulsion engine. At this time, the fuel supply unit includes at least one of a pump that pressurizes the liquefied gas, a compressor that compresses the evaporated gas that is vaporized by the liquefied gas, and a heat exchanger that heats the liquefied gas / evaporated gas. However, it is not limited to this.

  That is, the fuel supply unit includes all the components for transmitting the liquefied gas to the propulsion engine in accordance with the temperature and pressure required by the propulsion engine, and the evaporative gas treatment for maintaining the pressure resistance of the liquefied gas storage tank 20. The meaning may also include the configuration of.

  The fuel supply chamber 60 may be provided in the upper part of the upper deck 11 of the hull 10, and the cabin A may be provided in the upper part of the fuel supply chamber 60. That is, although the fuel supply chamber 60 is provided in the lower portion of the cabin A, the fuel supply chamber 60 is an area that handles liquefied gas that has a risk of explosion. Therefore, in order to protect the cabin A, the fuel supply chamber 60 and the cabin A are protected. A heat insulating partition wall 61 may be provided between them.

  Since the fuel supply chamber 60 includes a fuel supply section that handles liquefied gas, there is a risk of leakage of liquefied gas. Further, since the fuel supply chamber 60 is a space for handling liquefied gas, ventilation can be required.

  Accordingly, the fuel supply chamber 60 is provided with a vent portion for discharging internal fluid such as leaked gas or internal air to the outside to promptly remove the leaked gas or to properly implement ventilation of the fuel supply chamber 60. 64 may be provided.

  The vent portion 64 discharges the fluid in the front-back direction or the lateral direction of the fuel supply chamber 60. Since the upper part of the fuel supply chamber 60 is the cabin A, the vent portion 64 can not discharge the fluid upward.

  Explosion-proof may be required within a certain radius with reference to the vent portion 64 from which a fluid having an explosion risk is discharged. However, as described above, the lashing bridge L is provided in front of and behind the cabin A, and the socket S for connecting the refrigerating container C is provided in the lashing bridge L, but it is practical to provide the socket S for explosion protection. Have difficulty.

  However, in consideration of the fact that the socket S is connected to the rear of the container C, the socket S is not provided to the lashing bridge L provided to the rear of the cabin A. The vent may be implemented rearward, that is, rearward of the fuel supply chamber 60.

  Therefore, the vent portion 64 discharges the fluid inside the fuel supply chamber 60 toward the lashing bridge L where the socket S is not provided, so that it is not necessary to prepare for the installation of the explosion-proof socket S in the present embodiment. ..

  The upper end of the dome 21 may be located inside the fuel supply chamber 60. The dome 21 of the liquefied gas storage tank 20 is provided so as to penetrate the upper deck 11, but the upper end of the dome 21 may be surrounded by the fuel supply chamber 60 provided on the upper deck 11.

  The gas fuel line 62 accommodated in the dome 21 is connected to a fuel supply unit provided in the fuel supply chamber 60, and the liquefied gas / evaporated gas discharged from the inside of the liquefied gas storage tank 20 via the gas fuel line 62 , Appropriately processed by the fuel supply and delivered to the propulsion engine.

  The gas fuel line 62 is connected from the fuel supply chamber 60 to the propulsion engine, but the gas fuel line 62 is thermally deformed by the temperature of the liquefied gas, or the gas fuel line 62 is deformed by the movement of the hull 10. Sometimes.

  At this time, the gas fuel line 62 does not have to be provided in a straight line from the fuel supply chamber 60 to the propulsion engine in order to provide a deformation of the gas fuel line 62, and may be bent or bent (for example, the expansion loop 62b ( The gas fuel line 62 is provided with a bent or bent portion so that even if the gas fuel line 62 is deformed, the gas fuel line 62 is stably maintained without being damaged. Liquefied gas can be transmitted to the propulsion engine.

  However, it is necessary to secure a space in order to form a bent or bent portion in the gas fuel line 62. At this time, in this embodiment, instead of forming an additional space, the space already provided in the hull 10 can be utilized to secure a space in which the gas fuel line 62 can be bent.

  First, the gas fuel line 62 may be provided adjacent to the staircase portion B. As described above, the staircase portion B has a hull shape of the hull 10 in which the width becomes narrower from the central portion toward the bow 14 and the stern 15, so that the position and the shape may not be constant. At this time, the gas fuel line 62 may be provided so as to be bent or bent so as to correspond to the fluctuation of the staircase portion B.

  The gas fuel line 62 may be surrounded by a line duct 62a, and the line duct 62a is provided along the stepped portion B and extends in a position adjacent to the fuel supply chamber 60 toward the propulsion engine while varying in position. can do. In this case, the gas fuel line 62 may be provided so as to be bent or bent so as to correspond to the position variation of the line duct 62a.

  That is, as shown in FIG. 4, the position of the line duct 62a in the central portion is shown by a dotted line, and when the hull form of the hull 10 becomes narrower toward the bow 14 and the stern 15, the position of the line duct 62a is shown by a solid line. It was Comparing the two positions of the line duct 62a, it can be seen that the position of the line duct 62a changes to the inner side from the central portion toward the bow 14 and the stern 15.

  Therefore, as shown in FIG. 3, the line duct 62a can be bent inward while extending in the front-rear direction of the hull 10. At this time, the line fuel duct 62 is formed in the bent portion of the line duct 62a. Bent or bent portions may be provided.

  The line duct 62a may be extended toward the propulsion engine at a position adjacent to the fuel supply chamber 60, and the position may be changed outward or inward at least once. For example, the line duct 62a is adjacent to the fuel supply chamber 60. The position may change outward and then inward while being extended toward the propulsion engine in position.

  The gas fuel line 62 may be bent or bent to the outside and then bent or bent to the inside according to the position variation of the line duct 62a. Of course, the position variation of the line duct 62a and the arrangement of the bent or bent portion of the gas fuel line 62 are not particularly limited to the above.

  And / or the gas fuel line 62 can have an expansion loop 62b that is bent or bent at the position of the gap G. The gap G is a separated space provided between the holds H and the holds H or between the bays, and the gas fuel line 62 may be connected to the propulsion engine from the fuel supply chamber 60 via the gap G. At this time, an expansion loop 62b is provided in a part of the gas fuel line 62 located in the gap G, and an independent space for installing the expansion loop 62b is provided in preparation for thermal deformation of the gas fuel line 62. Can be omitted.

  The line duct 62a that houses the gas fuel line 62 may be provided in contact with the stepped portion B as described above, or may be provided in the double bottom structure 13a. However, in both the former and the latter, the line duct 62a comes to pass through the gap G, and the gap G allows the space around the line duct 62a to be used for the gas fuel line 62.

  Therefore, the line duct 62a is expanded at the position of the gap G, and the gas fuel line 62 can have an expansion loop 62b at the expanded portion of the line duct 62a. And / or the line duct 62a may be opened at the position of the gap G, and the gas fuel line 62 may have an expansion loop 62b protruding outside the line duct 62a at the open portion of the line duct 62a.

  As a result, in the present embodiment, the line duct 62a for accommodating the gas fuel line 62 is provided in contact with the staircase portion B whose position / form varies depending on the ship type, so that the position is extended forward and backward to change the position. In this way, the gas fuel line 62 can be bent or bent at a position where the position of the line duct 62a is changed, so that the gas fuel line 62 can be prepared for deformation.

  And / or in the present embodiment, even if the line duct 62a is linearly provided, the line duct 62a is expanded or opened at the point where the gap G is located, and the expansion loop 62b is provided in the gas fuel line 62, Even if the gas fuel line 62 is deformed, the transmission of the liquefied gas can be stably maintained.

  The fuel supply chamber 60 may be provided with a void portion 63. It may be provided on the deck D between the fuel supply chamber 60 and the cabin A. Hereinafter, the deck D referred to in the portion describing the void portion 63 means the A deck D for convenience in the drawings.

  The void portion 63 is recessed toward the cabin A on the deck D facing the upper deck 11. The void portion 63 may be provided directly above the dome 21, and the dome 21 can be projected on the void portion 63. The void portion 63 includes at least a portion immediately above the dome 21, and may have a large area or the same area as the dome 21.

  Since the void portion 63 is provided, the fuel supply chamber 60 may have a shape in which the height of the position where the dome 21 is provided is relatively higher than the height of other portions. The difference between the height where the dome 21 is provided and the height of the other portions corresponds to the height of the void portion 63.

  The height of the void portion 63 may be the same as or different from the height between the A deck D and the B deck. However, when the height of the void portion 63 is the same as the height between the A deck D and the B deck, the A deck D may be provided so as to be omitted in the portion where the dome 21 is provided.

  In the present embodiment, the void portion 63 is provided on the upper side of the fuel supply chamber 60 because the equipment (not shown) housed inside the liquefied gas storage tank 20 is taken out via the dome 21 and / or the liquefied gas storage is provided. This is because equipment is installed inside the tank 20. Equipment such as a pump may be housed in the liquefied gas storage tank 20, and the equipment must be taken out of the liquefied gas storage tank 20 or put in the liquefied gas storage tank 20 for maintenance and replacement. I won't.

  At this time, the equipment can be put in and out only through the dome 21, but since the dome 21 may penetrate the upper deck 11 and the upper portion thereof may be provided slightly higher than the upper deck 11, the void portion 63 is provided. If not, the height between the dome 21 and the deck D is smaller than the height of the fuel supply chamber 60.

  In this case, depending on the size of the equipment (particularly due to the height of the equipment), it is possible that the deck D blocks or prevents the equipment from being put in or taken out through the dome 21. Therefore, in this embodiment, it is possible to provide the void portion 63 and sufficiently secure the height above the dome 21, so that the loading and unloading of the equipment can be efficiently realized.

  At this time, the void portion 63 may be provided with a crane 63a. The crane 63a may be installed above the deck D, and the equipment installed inside the liquefied gas storage tank 20 can be taken out through the dome 21 and / or the equipment installed inside the liquefied gas storage tank 20. Here, the type of the crane 63a is not particularly limited, but the crane 63a may be, for example, an overhead crane 63a. In addition, any structure can be provided in the void portion 63 instead of the crane 63a or together with the crane 63a as long as the equipment can be lifted.

  The bunker station 70 receives the liquefied gas from the outside and transfers it to the liquefied gas storage tank 20. The bunker station 70 may be provided outside the hull 10 rather than inside the hull 10 for efficient connection with the outside.

  The bunker station 70 may be provided on the upper deck 11. In addition, the bunker station 70 may be located in a central portion of the hull 10 in which the liquefied gas storage tank 20 is installed in order to reduce a distance from the liquefied gas storage tank 20.

  For example, the bunker stations 70 may be provided on the left and right of the fuel supply chamber 60. Therefore, the left and right widths of the fuel supply chamber 60 may be smaller than the left and right widths of the hull 10, and the side wall of the fuel supply chamber 60 may be provided inwardly spaced from the side shell 12 of the hull 10. Therefore, the left and right widths of the bunker station 70 can be allowed by the distance between the ship side outer plate 12 and the side wall of the fuel supply chamber 60. At this time, the inner side wall of the bunker station 70 may be in contact with the side wall of the fuel supply chamber 60, and the outer side wall of the bunker station 70 may be vertically aligned with the ship side outer plate 12.

  However, the bunker station 70 may have a form in which at least a part of the outer side wall penetrates, and may have a form in which the opening 31 is formed in the outer side direction. This is to enable the bunker station 70 to be quickly connected to an external liquefied gas supply source, and to discharge leak gas that leaks inside the bunker station 70.

  The upper surface of the bunker station 70 may be inclined upward toward the outside. If leak gas is generated in the bunker station 70, the leak gas may be in a gas state at room temperature and may flow upward.

  At this time, through the inclined upper surface of the bunker station 70, the leaked gas may flow along the outside and then be discharged to the opened outside. Therefore, the outer side of the opening 31 in the bunker station 70 may have a form in which the opening 31 is opened downward from the upper surface by a certain height.

  The bunker station 70 may have a U-shaped cross section by having an open outer side. The inner wall of the bunker station 70 may be adjacent to the fuel supply chamber 60, and the cabin A is provided above the fuel supply chamber 60. Therefore, the bunker station 70 is provided on the left and right of the cabin A at a position lower than the cabin A. Is provided at a position relatively close to the cabin A.

  However, since the bunker station 70 is a dangerous area where liquefied gas is handled, in order to protect the cabin A from the dangerous elements of the bunker station 70, the bunker station 70 has a form in which all surfaces facing the cabin A are sealed. be able to. At this time, in the bunker station 70, the surface facing the cabin A may be an upper surface, an inner side surface, or the like, and the outer surface is a surface opposite to the cabin A, and thus is provided in an open form as described above.

  Louvers 71 for discharging gas may be provided on the front and rear surfaces of the bunker station 70. The louver 71 is provided to discharge the leaked gas generated in the bunker station 70 to the outside.

  However, if the leaked gas is discharged through the front and rear surfaces of the bunker station 70, the leaked gas may be transmitted to the cabin A side. Therefore, the louver 71 is provided in a form that discharges the leaked gas away from the cabin A. Good.

  A recess 72 for preventing interference with a davit (not shown) may be formed on the front and rear surfaces of the bunker station 70. A davit may be provided before and after the bunker station 70 or outside the land where the liquefied gas supply source is provided, and the davit needs to be close to the configuration housed in the bunker station 70.

  However, if the bunker station 70 has a U-shaped flat cross section, it may be difficult for the davit to approach. Therefore, in the present embodiment, the recess 72 is formed on the front and rear surfaces of the bunker station 70 to prevent the davit from moving. Upon rotation, the ends of the davit can be easily positioned inside the bunker station 70.

  Here, the concave portion 72 may have a shape that is recessed inward from the outer side on the front and rear surfaces, and may be provided outside the louver 71. The reason for setting the positions of the louver 71 and the recess 72 as described above is that the recess 72 cannot prevent the davit from interfering unless the recess 72 is recessed inward from the outer side by a certain width. This is because it may be provided at a position separated from the outer side to the inner side. It goes without saying that the louver 71 may be provided inside and / or above and below the recess 72.

  The transformer room 80 is housed inside the hull 10 on the left and right of the liquefied gas storage tank 20. The transformer room 80 accommodates a transformer (not shown), and at this time, the transformer may be configured to convert voltages of various electric powers used in the gas fuel propelled container carrier 1.

  The transformer room 80 may be provided outside the cofferdam 30 so as to abut the lower surface of the upper deck 11. That is, the transformer room 80 may be provided directly below the upper deck 11 and may be provided between the upper wall of the oil storage tank 40 and the upper deck 11.

  Further, the transformer chamber 80 may be provided with an outer side wall thereof aligned with the outer side wall of the oil storage tank 40, or may be provided at a position spaced inward from the side plate 12 of the hull 10. A passage (not shown) may be provided between the outer wall of the transformer room 80 and the outer shell 12 to allow a crew member to move.

  In this embodiment, the height of the liquefied gas storage tank 20 is maximized so that the upper wall of the liquefied gas storage tank 20 is located just below the upper deck 11, and the liquefied gas required for operation is stored. However, when most of the space inside the hull 10 is used for the volume of the liquefied gas storage tank 20, the transformer room 80 cannot be installed inside the hull 10 and is installed in the engine casing I. Sometimes.

  However, the engine casing I is also a structure in which it is difficult to secure a space, and if the transformer chamber 80 is installed in the engine casing I, the physical quantity of the cable may increase. Therefore, in this embodiment, the transformer chamber 80 may be provided inside the hull 10 that is not the engine casing I. At this time, the transformer chamber 80 is located outside the cofferdam 30 surrounding the liquefied gas storage tank 20 and the oil. It may be above the storage tank 40.

  In the present embodiment, if the capacity of the liquefied gas storage tank 20 is sufficiently secured, the capacity of the oil storage tank 40 can be reduced. Therefore, in this embodiment, the oil storage tank 40 has a height from the stairs B to the upper deck 11. It is possible to arrange the transformer room 80 in a spare space between the oil storage tank 40 and the upper deck 11 so that the transformer room 80 has a height that does not reach the height.

  Accordingly, in the present embodiment, even if the height of the liquefied gas storage tank 20 is arranged so as to be adjacent to the upper deck 11, the transformer room 80 is provided inside the central portion of the hull 10 to reduce the quantity of cables. It is possible to reduce the space and to secure the space in other areas such as the engine casing I.

  The vent mast 90 discharges gas. The gas discharged by the vent mast 90 may be a liquefied gas, a leak gas leaking in various configurations or areas, air discharged for ventilation in various spaces, or the like.

  The vent mast 90 can discharge the leaked gas in the fuel supply chamber 60 to the outside, and may be located behind the engine casing I. At this time, the vent mast 90 may be provided so as to be supported on the upper deck 11 independently of the engine casing I, or may be structurally integrated with the engine casing I through another reinforcing member. Good.

  However, in this embodiment, the fuel supply chamber 60 can be provided in the central portion of the hull 10, but the engine casing I is arranged in the stern 15 of the hull 10. Therefore, when the vent of the fuel supply chamber 60 is implemented by the vent mast 90 provided at the rear of the engine casing I, a pipe for venting must be extended between the vent mast 90 and the fuel supply chamber 60. There's a problem.

  However, in the present embodiment, in addition to the vent mast 90 provided in the engine casing I, the vent mast 90 is further provided in the bow 14, and the vent mast 90 provided in the bow 14 is responsible for venting the fuel supply chamber 60. The vent mast 90 provided at the rear of the engine casing I can be responsible for venting the engine room R.

  Therefore, in this embodiment, since the distance between the fuel supply chamber 60 and the vent mast 90 can be reduced, the length of the pipe for venting can be shortened, and the pipe for venting can be held by the hold H. By passing through, it is possible to prevent the occurrence of problems such as reducing the loading amount of the container C.

  Further, if the length of the pipe for venting is reduced, not only the amount of material can be saved but also the friction loss acting on the pipe can be reduced. Therefore, the size of the pipe is reduced and the expansion loop 62b is applied to the pipe. Can be minimized.

  As described above, in this embodiment, in order to transfer the liquefied gas from the liquefied gas storage tank 20 to the propulsion engine to operate the gas fuel propelled container carrier 1, stability, manufacturing efficiency, and price are realized. All the benefits can be secured.

  FIG. 8 is a front sectional view of a gas fuel propelled container carrier according to a second embodiment of the present invention.

  Referring to FIG. 8, the gas fuel propelled container carrier 1 according to the second embodiment of the present invention can reduce the height of the liquefied gas storage tank 20 without reducing the volume of the liquefied gas storage tank 20. At this time, in the above-described embodiment, the oil storage tank 40 of the present embodiment may be provided at a position where the fuel supply chamber 60 is provided, and the fuel supply chamber 60 of the present embodiment is located above the upper deck 11. It may be provided between the deck 11 and the liquefied gas storage tank 20.

  In this case, in this embodiment, the liquefied gas storage tank 20 and the oil storage tank 40 may not be adjacent to each other. Of course, in the above-mentioned embodiment, the liquefied gas storage tank 20 and the oil storage tank 40 are separated by the cofferdam 30, but in this embodiment, the liquefied gas storage tank 20 and the oil storage tank 40 are provided between them. They can be separated from each other by the fuel supply chamber 60.

  FIG. 9 is a front sectional view of a gas fuel propelled container carrier according to a third embodiment of the present invention.

  Referring to FIG. 9, a gas fuel propelled container carrier 1 according to a third embodiment of the present invention may have a fuel supply chamber 60 provided on the left and right of the liquefied gas storage tank 20. In this case, this embodiment can maintain the volume of the liquefied gas storage tank 20 as it is, as compared with the above-described first embodiment.

  In this embodiment, the oil storage tank 40 may be provided on the upper deck 11 as described in the second embodiment. That is, in the present embodiment, the positions of the oil storage tank 40 and the fuel supply chamber 60 may be changed as compared with the first embodiment.

  However, in the first embodiment, there is no protruding member inside the space in which the oil storage tank 40 is provided, but in the case of the present embodiment, the oil storage tank 40 is provided in the space in which the oil storage tank 40 is provided in the first embodiment. Since the fuel supply chamber 60 is provided instead of, the protrusion member may be provided inside.

  In particular, in this embodiment, the fuel supply chamber 60 has a small width on the left and right and a high height. Therefore, a plurality of horizontal members (not shown) for installing the fuel supply unit are provided in the fuel supply chamber 60. Can be installed.

  The present invention has been described in detail above with reference to specific examples, but this is for specifically explaining the present invention, and the present invention is not limited to this and within the technical idea of the present invention. It will be apparent that modifications and improvements can be made by a person having ordinary skill in the art.

  All simple variations and modifications of the present invention shall fall within the scope of the present invention, and the specific protection scope of the present invention shall be made clear by the appended claims.

1 Gas Fuel Propulsion Container Carrier V Container A Vessel D Deck I Engine Casing R Engine Room H Hold V Hatch Cover M Hatch Combing T Stool G Gap B Stair L Lashing Bridge S Socket 10 Hull 11 Upper Deck 12 Ship Side Skin 13 Vessel Bottom plate 13a Double bottom structure 14 Bow 15 Stern 16 Connecting part 16a Through port 20 Liquefied gas storage tank 21 Dome 30 Cofferdam 31 Opening 32 Inner wall 33 Cavity 33a Choke 34 Girder member 35 Horizontal member 40 Oil storage tank 50 Ballast tank 60 Fuel supply Chamber 61 Adiabatic partition wall 62 Gas fuel line 62a Line duct 62b Expansion loop 63 Void portion 63a Crane 64 Vent portion 70 Bunker station 71 Louver 72 Recessed portion 80 Transformer chamber 90 Bent mast

Claims (8)

A liquefied gas storage tank provided below the cabin for storing liquefied gas,
And a cofferdam provided between the liquefied gas storage tank and the hull,
The cofferdam is
It is provided between the upper wall of the liquefied gas storage tank and the upper deck and between the side wall of the liquefied gas storage tank and the outer shell of the liquefied gas, and is spaced inward as compared with the outer shell of the liquefied gas, and the lower wall of the liquefied gas storage tank and the bottom of the ship. A gas fuel propelled container carrier characterized by being omitted between the plates.   The gas fuel propelled container carrier of claim 1, further comprising ballast tanks provided on the left and right of the hull. The cofferdam is
The gas fuel propelled container carrier according to claim 2, wherein the container is installed between a side wall of the liquefied gas storage tank and the ballast tank. The cofferdam is
The gas fuel propelled container carrier of claim 1, wherein the interior is provided so as to communicate with a double bottom structure between the lower wall of the liquefied gas storage tank and the ship bottom plate. The cofferdam is
The gas fuel propulsion container carrier according to claim 4, wherein an opening for communicating with the double bottom structure is provided at a lower end of a portion surrounding a side wall of the liquefied gas storage tank. The cofferdam is
The gas fuel propelled container carrier according to claim 1, which has a reversed U-shape surrounding the liquefied gas storage tank based on a front cross section.   The gas fuel propelled container carrier according to claim 2, further comprising an oil storage tank provided between the liquefied gas storage tank and the ballast tank. The double bottom structure is
The gas fuel propelled container carrier according to claim 4, wherein the container ship is provided so as to be separated from the ballast tank.

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