JP5403900B2 - Liquefied gas carrier - Google Patents

Liquefied gas carrier Download PDF

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Publication number
JP5403900B2
JP5403900B2 JP2007297656A JP2007297656A JP5403900B2 JP 5403900 B2 JP5403900 B2 JP 5403900B2 JP 2007297656 A JP2007297656 A JP 2007297656A JP 2007297656 A JP2007297656 A JP 2007297656A JP 5403900 B2 JP5403900 B2 JP 5403900B2
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hull
tank
spherical
liquefied gas
ship
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JP2009120083A (en
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健司 津村
宏一 佐藤
泰史 塚本
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP2007297656A priority Critical patent/JP5403900B2/en
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to CN201510201101.XA priority patent/CN104816791A/en
Priority to CN200880115807A priority patent/CN101855129A/en
Priority to PCT/JP2008/070652 priority patent/WO2009063928A1/en
Priority to KR1020137004497A priority patent/KR20130031920A/en
Priority to KR1020107010433A priority patent/KR20100067130A/en
Priority to RU2010118345/11A priority patent/RU2446980C2/en
Publication of JP2009120083A publication Critical patent/JP2009120083A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B11/00—Interior subdivision of hulls
    • B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/24—Means for preventing unwanted cargo movement, e.g. dunnage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/16—Shells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B71/00—Designing vessels; Predicting their performance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG

Description

本発明は、液化ガス運搬船に関し、特に、モス方式球形タンク内に低温にて液化された天然ガス（ＬＮＧ）を貯蔵して運搬するＬＮＧ船に関するものである。   The present invention relates to a liquefied gas carrier, and more particularly to an LNG carrier that stores and transports natural gas (LNG) liquefied at low temperatures in a moss-type spherical tank.

モス方式球形タンク内に低温にて液化された天然ガス（ＬＮＧ）を貯蔵して運搬する液化ガス運搬船としては、例えば、特許文献１に開示されたものが知られている。
特公平５−４９５１９号公報 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.
Japanese Patent Publication No. 5-49519

しかしながら、上記特許文献１に開示された液化ガス運搬船では、船体のみで船級協会のルール等で要求される船舶の縦強度（船首尾方向（縦方向）に対し、自重、積載される貨物、波の力により生じる曲げの力およびせん断力に対する強度）を確保する必要があった。その為、船体の幅が必然的に大きくなり、船体抵抗および船体重量が増加し、航行性能を思うように向上させることができないといった問題点があった。   However, in the liquefied gas carrier disclosed in the above-mentioned Patent Document 1, the ship's longitudinal strength (ship weight, cargo to be loaded, wave It was necessary to ensure the strength against bending force and shearing force generated by the above-mentioned force. As a result, the width of the hull inevitably increases, the hull resistance and the hull weight increase, and the navigation performance cannot be improved as expected.

本発明は、上記の事情に鑑みてなされたもので、船体の幅を低減させることができ、船体抵抗および船体重量を低減させることができて、航行性能を向上させることができる液化ガス運搬船を提供することを目的とする。   The present invention has been made in view of the above circumstances, and a liquefied gas carrier ship capable of reducing the width of a hull, reducing hull resistance and hull weight, and improving navigation performance. The purpose is to provide.

本発明は、上記課題を解決するため、以下の手段を採用した。
本発明に係る液化ガス運搬船は、内部に液化されたガスを貯蔵するとともに、船首尾方向に沿って配置され、かつ、スカートを介して船体に固定された複数個の球形タンクと、これら球形タンクの上半部を覆うとともに、船首尾方向および船幅方向に沿って延びる一つの連続したタンクカバーと、前記船体の船底部に配置されたバラストタンクと、を備えた液化ガス運搬船であって、前記タンクカバーが、前記船体に対して剛に結合され、前記船体と一体となって縦強度を確保する構造を有し、前記バラストタンクは、前記船体の船側外板および船底外板に沿って、船首尾方向に配置された下部と、この下部の上面から鉛直上方に向かって延び、かつ、前記球形タンクの周方向に沿うとともに、前記球形タンクの底部上方を取り囲むように配置された上部と、を備え、前記球形タンクはそれぞれ、その上端部が前記球形タンクの赤道部に固定され、その下端部が前記バラストタンクの上部の上面上に固定された円筒形の前記スカートを介して前記船体に支持されているとともに、前記スカートの内周面、および前記バラストタンクの上部を形成する壁部の内周面が、平面視円形状を呈している。 The present invention employs the following means in order to solve the above problems.
A liquefied gas carrier according to the present invention stores a liquefied gas therein, and is arranged along a fore-and-aft direction and is fixed to a hull through a skirt, and these spherical tanks A liquefied gas carrier ship comprising: one continuous tank cover that extends along the fore and aft direction and a ballast tank disposed at the bottom of the hull ; The tank cover is rigidly coupled to the hull and has a structure that secures longitudinal strength integrally with the hull, and the ballast tank extends along a ship side skin and a ship bottom skin of the hull. A lower part arranged in the fore-and-aft direction, extending vertically upward from the upper surface of the lower part, and extending along the circumferential direction of the spherical tank and surrounding the upper part of the bottom of the spherical tank. Comprising an upper that is, the respective said spherical tank has its upper end portion is fixed to the equatorial portion of the spherical tank, the skirt cylindrical fixed on the upper surface of the upper portion of its lower end the ballast tank together it is supported on the hull through the inner circumferential surface of the front Symbol skirt, and an inner peripheral surface of the wall portion forming the top of the ballast tank, and has a circular shape in plan view.

本発明に係る液化ガス運搬船によれば、全球形タンクの上半部を覆う一つの連続したタンクカバーが、船体に対して剛に結合され、船体とともに、例えば、船級協会のルールで要求される船舶の縦強度を確保する構造となっているので、船体の幅を、例えば、２％〜４％程度（好ましくは２％程度）低減させることができ、船体抵抗および船体重量を低減させることができて、航行性能を向上させるとともに、船体を構成する材料（例えば、鋼材）の総量を低減させることができて、建造コストの低減化を図ることができる。
また、本発明に係る液化ガス運搬船によれば、船体の船底部に配置されたバラストタンクの上部が、球形タンクの周方向に沿うとともに、球形タンクの底部上方を取り囲むように配置されているので、これらバラストタンクの上部を、球形タンクを支持するスカートの一部として流用することができ、スカートを構成する材料の総量を低減させることができて、建造コストの低減化を図ることができる。 According to the liquefied gas carrier according to the present invention, one continuous tank cover covering the upper half of the spherical tank is rigidly connected to the hull, and is required by the rules of the classification society, for example, together with the hull. Since the structure ensures the longitudinal strength of the ship, the width of the hull can be reduced, for example, by about 2% to 4% (preferably about 2%), and hull resistance and hull weight can be reduced. In addition, the navigation performance can be improved, and the total amount of material (for example, steel) constituting the hull can be reduced, so that the construction cost can be reduced.
Further, according to the liquefied gas carrier according to the present invention, the upper part of the ballast tank arranged at the bottom of the hull is arranged so as to be along the circumferential direction of the spherical tank and surround the upper part of the spherical tank. The upper part of these ballast tanks can be used as a part of the skirt that supports the spherical tank, the total amount of the material constituting the skirt can be reduced, and the construction cost can be reduced.

本発明に係る液化ガス運搬船は、内部に液化されたガスを貯蔵するとともに、船首尾方向に沿って配置され、かつ、スカートを介して船体に固定された複数個の球形タンクと、前記船体の船底部に配置されたバラストタンクと、を備えてなる液化ガス運搬船であって、前記バラストタンクは、前記船体の船側外板および船底外板に沿って、船首尾方向に配置された下部と、この下部の上面から鉛直上方に向かって延び、かつ、前記球形タンクの周方向に沿うとともに、前記球形タンクの底部上方を取り囲むように配置された上部と、を備え、前記球形タンクはそれぞれ、その上端部が前記球形タンクの赤道部に固定され、その下端部が前記バラストタンクの上部の上面上に固定された円筒形の前記スカートを介して前記船体に支持されているとともに、前記スカートの内周面、および前記バラストタンクの上部を形成する壁部の内周面が、平面視円形状を呈している。 A liquefied gas carrier according to the present invention stores a liquefied gas therein, and is arranged along a fore-and-aft direction, and is fixed to the hull through a skirt, and the hull A liquefied gas carrier ship comprising a ballast tank disposed at the bottom of the ship , wherein the ballast tank includes a lower part disposed in the bow-stern direction along the ship side skin and the ship bottom skin of the hull, An upper portion extending vertically upward from the upper surface of the lower portion and extending along the circumferential direction of the spherical tank and surrounding the upper portion of the bottom of the spherical tank, and each of the spherical tanks upper end is fixed to the equatorial portion of the spherical tank is supported by the hull through the skirt of the fixed cylindrical on the upper surface of the upper portion of its lower end the ballast tank Both the inner peripheral surface of the front Symbol skirt, and an inner peripheral surface of the wall portion forming the top of the ballast tank, and has a circular shape in plan view.

本発明に係る液化ガス運搬船によれば、船体の船底部に配置されたバラストタンクの上部が、球形タンクの周方向に沿うとともに、球形タンクの底部上方を取り囲むように配置されているので、これらバラストタンクの上部を、球形タンクを支持するスカートの一部として流用することができ、スカートを構成する材料の総量を低減させることができて、建造コストの低減化を図ることができる。   According to the liquefied gas carrier according to the present invention, the upper part of the ballast tank arranged at the bottom of the hull is arranged so as to surround the spherical tank and to surround the upper part of the spherical tank. The upper part of the ballast tank can be used as a part of the skirt that supports the spherical tank, the total amount of the material constituting the skirt can be reduced, and the construction cost can be reduced.

本発明に係る液化ガス運搬船によれば、船体の幅を低減させることができ、船体抵抗および船体重量を低減させることができて、航行性能を向上させることができるという効果を奏する。   According to the liquefied gas carrier ship of the present invention, the width of the hull can be reduced, the hull resistance and the hull weight can be reduced, and the navigation performance can be improved.

以下、本発明に係る液化ガス運搬船の一実施形態について、図１から図４を参照しながら説明する。
図１は本実施形態に係る液化ガス運搬船の図であって、（ａ）は右側面図、（ｂ）は平面図、図２は図１（ａ）のＩＩ−ＩＩ矢視断面図、図３は本実施形態に係る液化ガス運搬船の図であって、（ａ）は図１（ａ）のＡ−Ａ矢視断面図、（ｂ）は図１（ｂ）のＢ−Ｂ矢視断面図、図４は図１（ａ）のＩＶ−ＩＶ矢視断面図である。 Hereinafter, an embodiment of a liquefied gas carrier according to the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a diagram of a liquefied gas carrier according to the present embodiment, where (a) is a right side view, (b) is a plan view, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a diagram of a liquefied gas carrier according to the present embodiment, where (a) is a cross-sectional view taken along the line AA in FIG. 4 and 4 are cross-sectional views taken along arrows IV-IV in FIG.

図１（ａ）、図１（ｂ）、および図３（ａ）に示すように、本実施形態に係る液化ガス運搬船（本実施形態では「ＬＮＧ船」）１は、例えば、四個のアルミニウム製の球形タンク（「モス方式球形タンク」ともいう。）２を備えた船舶であり、これらアルミニウム製の球形タンク２はそれぞれ、その内部に、液化されたガス（本実施形態では低温にて液化された天然ガス）を貯蔵することができるように構成されたものである。
また、図２に示すように、これら球形タンク２はそれぞれ、その上端部が球形タンク２の赤道部に固定され、その下端部がファンデーションデッキ４上に固定された円筒形のスカート３を介して船体５に支持されている。すなわち、これら球形タンク２の重量は、スカート３を通して船体５で受けられるようになっている。 As shown in FIG. 1 (a), FIG. 1 (b), and FIG. 3 (a), the liquefied gas carrier ship ("LNG ship" in this embodiment) 1 according to this embodiment includes, for example, four aluminum Each of the aluminum spherical tanks 2 has a liquefied gas (in this embodiment, liquefied at a low temperature), which is provided with a spherical tank (also referred to as a “moss type spherical tank”) 2 made of aluminum. Natural gas) is stored.
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.

さらに、図１（ａ）、図１（ｂ）、および図２に示すように、これら球形タンク２の上半部は、その下端部が上甲板６上に固定されるとともに、船首尾方向および船幅方向に沿って延びる一つの連続したタンクカバー７により覆われている。また、タンクカバー７と上甲板６との間に、伸縮継手は一切設けられておらず、タンクカバー７は剛体構造になっている。すなわち、タンクカバー７は、船体５とともに、船級協会のルール等で要求される船舶の縦強度（船首尾方向（縦方向）に対し、自重、積載される貨物、波の力により生じる曲げの力およびせん断力に対する強度）を確保する構造となっている。
なお、図２中の符号８，９はそれぞれ、縦通隔壁、船側外板を示している。 Furthermore, as shown in FIGS. 1 (a), 1 (b), and 2, the upper half of these spherical tanks 2 is fixed at the lower end on the upper deck 6, and in the fore and aft direction. It is covered with one continuous tank cover 7 extending along the ship width direction. 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.

図１（ａ）、図２、図３（ａ）、図３（ｂ）、および図４に示すように、船体５の船底部には、船首尾方向および船幅方向に沿って、複数個（本実施形態では１７個）のバラストタンク１０が設けられている。
これらバラストタンク１０のうち、船首に最も近い位置に配置されたバラストタンク１０以外のバラストタンク１０はそれぞれ、球形タンク２の周方向に沿うとともに、球形タンク２の底部上方を取り囲むように配置された上部と、船体５の船側外板９および船底外板１１に沿って、船首尾方向に配置された下部とを備えている。 As shown in FIG. 1 (a), FIG. 2, FIG. 3 (a), FIG. 3 (b), and FIG. (In the present embodiment, 17 ballast tanks 10) are provided.
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 portion of the spherical tank 2. The upper part and the lower part arrange | positioned in the bow-tail direction along the ship side outer plate 9 and the ship bottom outer plate 11 of the hull 5 are provided.

本実施形態に係る液化ガス運搬船１によれば、全球形タンク２の上半部を覆う一つの連続したタンクカバー７が、船体５に対して剛に結合され、船体５とともに、船級協会のルール等で要求される船舶の縦強度を確保する構造となっているので、船体５の幅を２％〜４％程度（好ましくは２％程度）低減させることができ、船体抵抗および船体重量を低減させることができて、航行性能を向上させることができるとともに、船体５を構成する材料（例えば、鋼材）の総量を低減させることができて、建造コストの低減化を図ることができる。   According to the liquefied gas carrier 1 according to the present embodiment, one continuous tank cover 7 that covers the upper half of the global tank 2 is rigidly coupled to the hull 5, together with the hull 5, the rules of the classification society. Since it has a structure that ensures the vertical strength of the ship required by, etc., the width of the hull 5 can be reduced by about 2% to 4% (preferably about 2%), and hull resistance and hull weight can be reduced. Thus, the navigation performance can be improved and the total amount of material (for example, steel) constituting the hull 5 can be reduced, so that the construction cost can be reduced.

また、図３（ａ）に示すように、バラストタンク１０の上部が、球形タンク２の周方向に沿うとともに、球形タンク２の底部上方を取り囲むように配置されているので、これらバラストタンク１０の上部を、球形タンク２を支持するスカート３の一部として流用することができ、スカート３を構成する材料の総量を低減させることができて、建造コストの低減化を図ることができる。   Further, as shown in FIG. 3A, the upper part of the ballast tank 10 is arranged so as to be along the circumferential direction of the spherical tank 2 and to surround the upper part of the bottom of the spherical tank 2. The upper part 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.

なお、本発明は上述した実施形態に限定されるものではなく、例えば、上述した実施形態において、スカート３の内周面と、バラストタンク１０の上部を構成（形成）する壁部（球形タンク２の周方向に沿って存する壁部）１２（図２参照）の内周面とを同一平面上に位置させ、かつ、これらスカート３と壁部１２とを同一の部材で構成する等、本発明の技術的思想を逸脱しない範囲内で適宜必要に応じて変形実施および変更実施することができる。   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.

本発明の一実施形態に係る液化ガス運搬船の図であって、（ａ）は右側面図、（ｂ）は平面図である。It is a figure of the liquefied gas carrier ship which concerns on one Embodiment of this invention, Comprising: (a) is a right view, (b) is a top view. 図１（ａ）のＩＩ−ＩＩ矢視断面図である。It is II-II arrow sectional drawing of Fig.1 (a). 本発明の一実施形態に係る液化ガス運搬船の図であって、（ａ）は図１（ａ）のＡ−Ａ矢視断面図、（ｂ）は図１（ｂ）のＢ−Ｂ矢視断面図である。It is a figure of the liquefied gas carrier ship which concerns on one Embodiment of this invention, Comprising: (a) is AA arrow sectional drawing of Fig.1 (a), (b) is BB arrow view of FIG.1 (b). It is sectional drawing. 図１（ａ）のＩＶ−ＩＶ矢視断面図である。It is IV-IV arrow directional cross-sectional view of Fig.1 (a).

１ 液化ガス運搬船
２ 球形タンク
３ スカート
５ 船体
７ タンクカバー
１０ バラストタンク 1 liquefied gas carrier 2 spherical tank 3 skirt 5 hull 7 tank cover 10 ballast tank

Claims (2)

内部に液化されたガスを貯蔵するとともに、船首尾方向に沿って配置され、かつ、スカートを介して船体に固定された複数個の球形タンクと、
これら球形タンクの上半部を覆うとともに、船首尾方向および船幅方向に沿って延びる一つの連続したタンクカバーと、
前記船体の船底部に配置されたバラストタンクと、を備えた液化ガス運搬船であって、
前記タンクカバーが、前記船体に対して剛に結合され、前記船体と一体となって縦強度を確保する構造を有し、
前記バラストタンクは、前記船体の船側外板および船底外板に沿って、船首尾方向に配置された下部と、この下部の上面から鉛直上方に向かって延び、かつ、前記球形タンクの周方向に沿うとともに、前記球形タンクの底部上方を取り囲むように配置された上部と、を備え、
前記球形タンクはそれぞれ、その上端部が前記球形タンクの赤道部に固定され、その下端部が前記バラストタンクの上部の上面上に固定された円筒形の前記スカートを介して前記船体に支持されているとともに、前記スカートの内周面、および前記バラストタンクの上部を形成する壁部の内周面が、平面視円形状を呈していることを特徴とする液化ガス運搬船。 A plurality of spherical tanks that store the liquefied gas inside and are arranged along the fore-and-aft direction and are fixed to the hull through skirts;
One continuous tank cover covering the upper half of these spherical tanks and extending along the fore-and-aft direction and the ship width direction ;
A liquefied gas carrier ship provided with a ballast tank disposed at the bottom of the hull ,
The tank cover is rigidly coupled to the hull, and has a structure for securing a longitudinal strength integrally with the hull;
The ballast tank extends along the ship side skin and the ship bottom skin of the hull in the bow-stern direction, and extends vertically upward from the upper surface of the bottom, and in the circumferential direction of the spherical tank. And an upper part arranged to surround the upper part of the bottom of the spherical tank,
Each of the spherical tanks is supported by the hull through the cylindrical skirt, the upper end of which is fixed to the equator of the spherical tank, and the lower end of which is fixed on the upper surface of the upper part of the ballast tank. together are liquefied gas carrier to the inner peripheral surface of the front Symbol skirt, and an inner peripheral surface of the wall portion forming the top of the ballast tank, characterized in that it exhibits a circular shape in plan view. 内部に液化されたガスを貯蔵するとともに、船首尾方向に沿って配置され、かつ、スカートを介して船体に固定された複数個の球形タンクと、
前記船体の船底部に配置されたバラストタンクと、を備えてなる液化ガス運搬船であって、
前記バラストタンクは、前記船体の船側外板および船底外板に沿って、船首尾方向に配置された下部と、この下部の上面から鉛直上方に向かって延び、かつ、前記球形タンクの周方向に沿うとともに、前記球形タンクの底部上方を取り囲むように配置された上部と、を備え、
前記球形タンクはそれぞれ、その上端部が前記球形タンクの赤道部に固定され、その下端部が前記バラストタンクの上部の上面上に固定された円筒形の前記スカートを介して前記船体に支持されているとともに、前記スカートの内周面、および前記バラストタンクの上部を形成する壁部の内周面が、平面視円形状を呈していることを特徴とする液化ガス運搬船。 A plurality of spherical tanks that store the liquefied gas inside and are arranged along the fore-and-aft direction and are fixed to the hull through skirts ;
A liquefied gas carrier ship comprising a ballast tank disposed at the bottom of the hull ,
The ballast tank extends along the ship side skin and the ship bottom skin of the hull in the bow-stern direction, and extends vertically upward from the upper surface of the bottom, and in the circumferential direction of the spherical tank. And an upper part arranged to surround the upper part of the bottom of the spherical tank,
Each of the spherical tanks is supported by the hull through the cylindrical skirt, the upper end of which is fixed to the equator of the spherical tank, and the lower end of which is fixed on the upper surface of the upper part of the ballast tank. together are liquefied gas carrier to the inner peripheral surface of the front Symbol skirt, and an inner peripheral surface of the wall portion forming the top of the ballast tank, characterized in that it exhibits a circular shape in plan view.
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PCT/JP2008/070652 WO2009063928A1 (en) 2007-11-16 2008-11-13 Liquefied-gas carrying vessel
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