JP2015160443A - Carrier ship - Google Patents

Carrier ship Download PDF

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Publication number
JP2015160443A
JP2015160443A JP2014034876A JP2014034876A JP2015160443A JP 2015160443 A JP2015160443 A JP 2015160443A JP 2014034876 A JP2014034876 A JP 2014034876A JP 2014034876 A JP2014034876 A JP 2014034876A JP 2015160443 A JP2015160443 A JP 2015160443A
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Prior art keywords
machine room
hull
tanks
flat plate
tank
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JP6183611B2 (en
Inventor
泰史 塚本
Yasushi Tsukamoto
泰史 塚本
石田　聡成
Toshinari Ishida
聡成 石田
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP2014034876A priority Critical patent/JP6183611B2/en
Priority to KR1020140096553A priority patent/KR20150101358A/en
Priority to CN201911282073.3A priority patent/CN111038650A/en
Priority to CN201410428897.8A priority patent/CN104859802A/en
Publication of JP2015160443A publication Critical patent/JP2015160443A/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
    • 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 
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent reductions in the maneuverability and fuel economy of a carrier ship due to installation of a machine room.SOLUTION: A carrier ship 1 comprises: a hull 2; a plurality of tanks 3 arranged along a fore-and-aft direction to protrude upward from the hull 2 and having storage spaces therein; a tank cover 10 continuously covering the tanks 3 in the fore-and-aft direction; and a machine room 20 stored in a storage region between a pair of the adjacent tanks 3 out of storage regions of the tanks 3 defined by the hull 2 and the tank cover 10.

Description

本発明は、運搬船に関する。   The present invention relates to a transport ship.

従来の運搬船には、例えば特許文献１のように、船体の上方に突出するように船体に固定されたタンクを船首尾方向に複数配列したものがある。
また、従来の運搬船は、タンク内の収容物（例えば液化された極低温の天然ガス（ＬＮＧ；液化天然ガス））を好適に保管できるように、タンク内の収容空間の圧力を保持するコンプレッサ（ガスコンプレッサ）等の各種機械を備える。 As a conventional transport ship, for example, as in Patent Document 1, a plurality of tanks fixed to the hull so as to protrude above the hull are arranged in the bow-stern direction.
Moreover, the conventional carrier ship is a compressor that holds the pressure of the accommodation space in the tank so that the contents in the tank (for example, liquefied cryogenic natural gas (LNG)) can be suitably stored. Various machines such as gas compressors.

特表２００５−５２１５８９号公報JP 2005-521589 A

ところで、上記した各種機械は、複数のタンクの突出部分を連続して覆うタンクカバーの頂部（上面）に設けられることが多い。この場合、各種機械を外部環境から保護するため、各種機械は機械室に収容された状態で設けられる。
しかしながら、機械室をタンクカバーの頂部に設けると、運搬船は前方（進行方向前側）や横方向（船幅方向）からの風の影響を受けやすくなる。例えば、前方からの風によって運搬船の進行に対する抵抗（風圧抵抗）が大きくなるため、運搬船の燃費が低下する虞がある。また、運搬船が横方向からの風の影響を受けやすくなると、運搬船の操船性（特に港湾内における操船性）及び燃費が低下する虞がある。 By the way, the various machines described above are often provided on the top (upper surface) of a tank cover that continuously covers the protruding portions of a plurality of tanks. In this case, in order to protect various machines from the external environment, the various machines are provided in a state of being accommodated in a machine room.
However, if the machine room is provided at the top of the tank cover, the transport ship is easily affected by wind from the front (front side in the traveling direction) and from the side (ship width direction). For example, since the wind from the front increases the resistance (wind pressure resistance) to the travel of the transport ship, the fuel efficiency of the transport ship may be reduced. Further, when the transport ship is easily affected by wind from the lateral direction, the ship maneuverability (especially the ship maneuverability in the harbor) and the fuel consumption may be reduced.

本発明は、上述した事情に鑑みたものであって、機械室の設置による操船性低下及び燃費低下を防止できる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-described circumstances, and an object of the present invention is to provide a transport ship that can prevent a decrease in maneuverability and fuel consumption due to the installation of a machine room.

この課題を解決するために、本発明に係る一態様としての運搬船は、船体と、該船体から上方に突出するように船首尾方向に沿って配置され、内部が収容空間とされた複数のタンクと、これら複数のタンクを船首尾方向に連続して覆うタンクカバーと、前記船体及び前記タンクカバーにより画成される前記複数のタンクの収納領域のうち互いに隣り合う一対のタンクの間の領域に収納される機械室と、を備えることを特徴とする。   In order to solve this problem, a transport ship according to an aspect of the present invention includes a hull and a plurality of tanks that are arranged along the bow-stern direction so as to protrude upward from the hull and have an interior serving as a storage space. And a tank cover that continuously covers the plurality of tanks in the bow-stern direction, and a region between a pair of adjacent tanks among the storage regions of the plurality of tanks defined by the hull and the tank cover. And a machine room to be stored.

上記運搬船によれば、機械室がタンクカバーによって画成されたタンクの収納領域に設けられることで、機械室の設置に基づいて運搬船が受ける風（特に前方や横方向からの風）の影響を無くすことができる。したがって、機械室の設置による運搬船の操船性低下及び燃費低下を防止することができる。
また、機械室は、互いに隣り合う一対のタンク間の領域に配されるため、船体に対する複数のタンクの設置を阻害することも防止できる。 According to the above carrier ship, the machine room is provided in the storage area of the tank defined by the tank cover, so that the influence of the wind (especially wind from the front or side) received by the carrier ship based on the installation of the machine room. It can be lost. Therefore, it is possible to prevent a decrease in ship maneuverability and fuel consumption due to the installation of the machine room.
Moreover, since the machine room is arranged in a region between a pair of adjacent tanks, it is possible to prevent the installation of a plurality of tanks on the hull.

そして、前記運搬船では、前記機械室が前記タンクカバーの内面に設けられてもよい。   In the transport ship, the machine room may be provided on the inner surface of the tank cover.

この場合には、船体に配置されるタンクの形状や大きさやタンク同士の間隔にあわせて機械室を設けたタンクカバーを用意すればよく、同一あるいは同型の船体を用いることが可能となる。   In this case, it is sufficient to prepare a tank cover provided with a machine room in accordance with the shape and size of the tank arranged in the hull and the interval between the tanks, and the same or the same type of hull can be used.

また、前記運搬船では、前記タンクカバーが、複数のタンクの上方を覆う頂壁部を備え、前記機械室が、前記頂壁部の下面に設けられてもよい。   In the transport ship, the tank cover may include a top wall portion that covers the upper side of the plurality of tanks, and the machine room may be provided on a lower surface of the top wall portion.

収容物をタンクに出し入れするための配管とタンクの取合部（タンクドーム）は、タンクの上部に設けられている。ここで、上記したように機械室がタンクカバーの頂壁部の下面に設けられていれば、機械室から各タンクの取合部までの距離が短くなる。これにより、機械室に配された各種機械と各タンクとを接続する配管の長さを短く設定できる。
したがって、配管を設けるためのコストを抑えることができる。 Piping and tank joint (tank dome) for taking in and out of the tank are provided in the upper part of the tank. Here, if the machine room is provided on the lower surface of the top wall part of the tank cover as described above, the distance from the machine room to the coupling part of each tank is shortened. Thereby, the length of piping which connects the various machines arranged in the machine room and each tank can be set short.
Therefore, the cost for providing piping can be held down.

さらに、前記運搬船では、前記頂壁部が、複数のタンクの上方に位置して船幅方向に平板状に延びる天井平板部を備え、前記機械室が、前記天井平板部の下面にのみ設けられてもよい。   Further, in the transport ship, the top wall portion includes a ceiling flat plate portion that is located above the plurality of tanks and extends in a flat plate shape in the ship width direction, and the machine room is provided only on a lower surface of the ceiling flat plate portion. May be.

機械室に配された機械に関係する構造物（配管、それに伴う支持構造等）は、機械の近くの領域に配されることが好ましい。ここで、上記したように機械室が天井平板部の下面のみに設けられていれば、上記構造物を機械室上に位置する平坦な天井平板部の上面上に容易に配置することが可能となる。   It is preferable that the structure (pipe, a support structure associated therewith) related to the machine arranged in the machine room is arranged in a region near the machine. Here, if the machine room is provided only on the lower surface of the ceiling plate as described above, the structure can be easily arranged on the upper surface of the flat ceiling plate located on the machine room. Become.

また、前記運搬船では、前記天井平板部の船幅方向の寸法が、前記船体の船幅方向の寸法の５０％以上かつ７５％以下であってもよい。   Further, in the transport ship, a dimension in the ship width direction of the ceiling flat plate portion may be 50% or more and 75% or less of a dimension in the ship width direction of the hull.

この場合には、仮に隣り合う一対のタンク同士の隙間が狭くても、機械室の船幅方向の寸法、及び機械室の高さ寸法を十分に確保できるため、複数の各種機械を同一の機械室に集約して配することが可能となる。
また、天井平板部の上面の面積が船幅方向に広いため、天井平板部の上面のうち機械室上に設ける構造物を船幅方向に分散して配置することが可能となる。このため、天井平板部の上面に配された構造物の高さ寸法を低く抑えることができる。したがって、上記構造物に基づいて運搬船が受ける風（特に前方や横方向からの風）の影響を小さく抑え、運搬船の操船性向上及び燃費向上を図ることができる。 In this case, even if the gap between a pair of adjacent tanks is narrow, it is possible to sufficiently secure the dimensions in the machine width direction of the machine room and the height dimension of the machine room. It becomes possible to collect and arrange in the room.
Moreover, since the area of the upper surface of the ceiling flat plate portion is wide in the ship width direction, it is possible to disperse and arrange the structures provided on the machine room on the upper surface of the ceiling flat plate portion in the ship width direction. For this reason, the height dimension of the structure distribute | arranged to the upper surface of the ceiling flat plate part can be restrained low. Therefore, it is possible to suppress the influence of the wind (especially wind from the front or side) received by the transport ship based on the structure, and to improve the maneuverability and fuel consumption of the transport ship.

さらに、前記運搬船は、前記船体上に設けられ、前記複数のタンクの船首側あるいは船尾側の端部に隣り合せて配置された甲板室を備え、前記機械室が、前記甲板室との間に一のタンクを挟み込む位置に配されてもよい。   Further, the transport ship includes a deck room provided on the hull and arranged adjacent to the bow side or stern side ends of the plurality of tanks, and the machine room is located between the deck room and the deck room. You may arrange | position to the position which pinches | interposes one tank.

この場合には、機械室が乗員の居住区として機能する甲板室の近くに配されるため、乗員は短時間で機械室に到着することができる。すなわち、乗員は機械室内の各種機械の保守点検や操作を速やかに行うことが可能となる。   In this case, since the machine room is arranged near the deck room functioning as a occupant's residence, the occupant can arrive in the machine room in a short time. That is, the occupant can quickly perform maintenance inspections and operations of various machines in the machine room.

また、前記運搬船では、前記機械室が、前記船体の船尾側の端部に配されてもよい。   In the transport ship, the machine room may be arranged at an end portion on the stern side of the hull.

この場合には、船体の船尾側の端部に設けられた運搬船の主機関（エンジン）とタンクとを接続する配管の長さを短く設定できる。
したがって、上記配管を設けるためのコストを抑えることができる。 In this case, the length of the pipe connecting the main engine (engine) and the tank of the transport ship provided at the stern end of the hull can be set short.
Therefore, the cost for providing the piping can be suppressed.

本発明によれば、機械室がタンクカバーによって画成されたタンクの収納領域に配されることで、機械室の設置に基づいて運搬船が受ける風の影響を無くすことができるため、機械室の設置による運搬船の操船性低下及び燃費低下を防止することができる。   According to the present invention, since the machine room is arranged in the tank storage area defined by the tank cover, it is possible to eliminate the influence of the wind received by the transport ship based on the installation of the machine room. It is possible to prevent a reduction in ship maneuverability and fuel consumption due to the installation.

本発明の第一実施形態に係る運搬船の側面図である。It is a side view of the transport ship which concerns on 1st embodiment of this invention. 本発明の第一実施形態に係る運搬船の上面図である。It is a top view of the transport ship which concerns on 1st embodiment of this invention. 図１のＡ−Ａ矢視断面図である。It is AA arrow sectional drawing of FIG. 図１のＢ−Ｂ矢視断面における要部拡大断面図である。It is a principal part expanded sectional view in the BB arrow cross section of FIG. 本発明の第二実施形態に係る運搬船の要部拡大断面図である。It is a principal part expanded sectional view of the carrier ship which concerns on 2nd embodiment of this invention.

〔第一実施形態〕
以下、図１〜４を参照して本発明の第一実施形態について説明する。
図１〜３に示すように、本実施形態に係る運搬船１は、船体２と、複数のタンク３と、タンクカバー１０と、機械室２０と、を備える。
船体２には、その甲板４から窪んで複数のタンク３を収容する収容凹部５が形成されている。収容凹部５は、船首尾方向に延びている。 [First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the transport ship 1 according to this embodiment includes a hull 2, a plurality of tanks 3, a tank cover 10, and a machine room 20.
The hull 2 is formed with an accommodating recess 5 that is recessed from the deck 4 and accommodates a plurality of tanks 3. The accommodation recess 5 extends in the bow-stern direction.

収容凹部５内には、複数のタンク３を下側から個別に支持する支持部６（スカート）が設けられている。本実施形態の支持部６は、後述するタンク３の形状に対応するように円筒状に形成されている。支持部６は、収容凹部５の船幅方向端部よりも内側において、その軸方向が船体２の高さ方向に向くように、甲板４よりも階段状に低く位置する段差面８（ファンデーションデッキ）上に固定されている。
船体２の甲板４上には、乗員の居住区として機能する甲板室７が設けられている。甲板室７は甲板４から上方に延びるように設けられている。甲板室７は、例えば上記した収容凹部５よりも船体２の船首側に隣り合せて設置されてもよいが、本実施形態では、上記した収容凹部５よりも船体２の船尾側に隣り合せて設置されている。
また、船体２の船尾側の端部には、運搬船１の推力を発生する主機関９（エンジン）が設けられている。 A support portion 6 (skirt) for individually supporting the plurality of tanks 3 from below is provided in the housing recess 5. The support portion 6 of this embodiment is formed in a cylindrical shape so as to correspond to the shape of the tank 3 described later. The support portion 6 has a stepped surface 8 (foundation deck) positioned lower than the deck 4 in a stepped manner so that the axial direction thereof faces the height direction of the hull 2 inside the end portion in the width direction of the housing recess 5. ) Is fixed on top.
On the deck 4 of the hull 2, a deck room 7 that functions as a occupant's residence is provided. The deck room 7 is provided so as to extend upward from the deck 4. The deck room 7 may be installed, for example, adjacent to the bow side of the hull 2 with respect to the above-described accommodating recess 5, but in this embodiment, adjacent to the stern side of the hull 2 with respect to the above-described accommodating recess 5. is set up.
A main engine 9 (engine) that generates thrust of the transport ship 1 is provided at the stern end of the hull 2.

複数のタンク３は、船体２から上方に突出するように船首尾方向に沿って配置されている。各タンク３の内部は収容空間とされている。各タンク３の下部は、船体２の収容凹部５内に配され、各タンク３の上部が船体２の甲板４よりも上方に突出する。
本実施形態のタンク３は球形に形成されている。タンク３の収容空間には、例えば液化された極低温の天然ガス（ＬＮＧ；液化天然ガス）等の収容物が収容される。各タンク３の下半球部（下部）は、船体２の収容凹部５内に配され、各タンク３の上半球部（上部）が船体２の甲板４よりも上方に突出する。
円筒状に形成された支持部６の径寸法は、タンク３の径寸法とほぼ等しくなるように設定されている。これにより、タンク３の中央部（上部と下部との間の部分）の外面が支持部６の上端部に当接し、タンク３を支持部６によって安定して支持することができる。
各タンク３には、収容物等をタンク３に出し入れするための取合部３１が設けられている。取合部３１は、各種配管（不図示）を接続できるように構成されている。本実施形態の取合部３１はタンク３の上端部に設けられている。 The plurality of tanks 3 are arranged along the bow-stern direction so as to protrude upward from the hull 2. The interior of each tank 3 is a storage space. The lower part of each tank 3 is disposed in the housing recess 5 of the hull 2, and the upper part of each tank 3 protrudes above the deck 4 of the hull 2.
The tank 3 of this embodiment is formed in a spherical shape. In the storage space of the tank 3, for example, storage such as liquefied cryogenic natural gas (LNG; liquefied natural gas) is stored. The lower hemisphere part (lower part) of each tank 3 is arranged in the housing recess 5 of the hull 2, and the upper hemisphere part (upper part) of each tank 3 protrudes above the deck 4 of the hull 2.
The diameter of the support portion 6 formed in a cylindrical shape is set to be substantially equal to the diameter of the tank 3. Thereby, the outer surface of the center part (part between the upper part and the lower part) of the tank 3 abuts on the upper end part of the support part 6, and the tank 3 can be stably supported by the support part 6.
Each tank 3 is provided with a coupling portion 31 for taking in and out the stored items and the like. The coupling part 31 is configured to connect various pipes (not shown). The coupling portion 31 of this embodiment is provided at the upper end portion of the tank 3.

タンクカバー１０は、複数のタンク３を船首尾方向に連続して覆う。タンクカバー１０は、船首尾方向に直交する断面でタンク３の上部を囲むアーチ形状（門型）に形成されている。タンクカバー１０の船首側の端部は、船首方向に向かうにしたがって先細るように（アーチ形状の断面が小さくなるように）形成されている。図示例では、タンクカバー１０の船尾側の端部が船首側の端部のように先細りに形成されているが、例えば先細るように形成されなくてもよい。また、タンクカバー１０の船尾側の端部は、図示例のように甲板室７に接しているが、例えば甲板室７から離れていてもよい。   The tank cover 10 continuously covers the plurality of tanks 3 in the bow-stern direction. The tank cover 10 is formed in an arch shape (gate shape) surrounding the upper portion of the tank 3 with a cross section orthogonal to the bow-stern direction. The end portion on the bow side of the tank cover 10 is formed so as to taper toward the bow direction (so that the arch-shaped cross section becomes smaller). In the illustrated example, the stern end of the tank cover 10 is tapered like the bow end, but it may not be tapered, for example. Moreover, although the edge part by the side of the stern of the tank cover 10 is in contact with the deck room 7 like the example of illustration, you may leave | separate from the deck room 7, for example.

タンクカバー１０は、複数のタンク３の上方を覆う頂壁部１１を備える。頂壁部１１は、複数のタンク３の上方に位置して船幅方向に平板状に延びる天井平板部１３を備える。
天井平板部１３は、図示例のように船幅方向に平行するように船幅方向に延びているが、例えば船幅方向中央部から船幅方向外側に向かうにしたがって微小に下方に傾斜するように形成されてもよい。天井平板部１３が微小に傾斜している場合には、雨水が天井平板部１３上に溜まることを防止できる。
また、頂壁部１１は、天井平板部１３の船幅方向両側に接続され、天井平板部１３に対して下方に傾斜する平板状の第一傾斜平板部１４を備える。 The tank cover 10 includes a top wall portion 11 that covers the upper side of the plurality of tanks 3. The top wall portion 11 includes a ceiling flat plate portion 13 that is located above the plurality of tanks 3 and extends in a flat plate shape in the ship width direction.
The ceiling flat plate portion 13 extends in the ship width direction so as to be parallel to the ship width direction as in the illustrated example. For example, the ceiling flat plate portion 13 slightly inclines downward from the center in the ship width direction toward the outside in the ship width direction. May be formed. When the ceiling flat plate portion 13 is slightly inclined, it is possible to prevent rainwater from collecting on the ceiling flat plate portion 13.
The top wall portion 11 includes a flat plate-like first inclined flat plate portion 14 that is connected to both sides of the ceiling flat plate portion 13 in the ship width direction and is inclined downward with respect to the ceiling flat plate portion 13.

さらに、タンクカバー１０は、頂壁部１１の船幅方向の両端に接続され、複数のタンク３の側部を覆う側壁部１２を備える。側壁部１２は、第一傾斜平板部１４の船幅方向外側の端部に順番に並べて接続される第二傾斜平板部１５及び第三傾斜平板部１６を備える。
天井平板部１３に対する第二傾斜平板部１５の傾斜角度は第一傾斜平板部の傾斜角度よりも大きく、第三傾斜平板部１６の傾斜角度は第二傾斜平板部１５の傾斜角度よりも大きい。第三傾斜平板部１６の傾斜角度は、例えば９０度であり、船体２の高さ方向に延びている。第三傾斜平板部１６の先端は、タンクカバー１０の開口端部となっている。 Furthermore, the tank cover 10 includes side walls 12 that are connected to both ends of the top wall 11 in the ship width direction and cover the sides of the plurality of tanks 3. The side wall portion 12 includes a second inclined flat plate portion 15 and a third inclined flat plate portion 16 which are arranged and connected in order to an end portion on the outer side in the ship width direction of the first inclined flat plate portion 14.
The inclination angle of the second inclined flat plate portion 15 with respect to the ceiling flat plate portion 13 is larger than the inclination angle of the first inclined flat plate portion, and the inclination angle of the third inclined flat plate portion 16 is larger than the inclination angle of the second inclined flat plate portion 15. The inclination angle of the third inclined flat plate portion 16 is 90 degrees, for example, and extends in the height direction of the hull 2. The tip of the third inclined flat plate portion 16 is an open end portion of the tank cover 10.

上記した天井平板部１３及び第一〜第三傾斜平板部１４〜１６は、スチール等のように剛性の高い金属材料によって一体に形成されている。
以上のように構成されるタンクカバー１０は、船首尾方向に直交する断面で多角形状に形成されている。
また、タンクカバー１０には、タンク３の取合部３１をタンクカバー１０の外側に突出させる挿通孔１７が形成されている。本実施形態では、挿通孔１７が天井平板部１３をその厚さ方向に貫通して形成されている。 The above-described ceiling flat plate portion 13 and the first to third inclined flat plate portions 14 to 16 are integrally formed of a highly rigid metal material such as steel.
The tank cover 10 configured as described above is formed in a polygonal shape with a cross section orthogonal to the bow-stern direction.
Further, the tank cover 10 is formed with an insertion hole 17 through which the coupling portion 31 of the tank 3 protrudes to the outside of the tank cover 10. In the present embodiment, the insertion hole 17 is formed through the ceiling flat plate portion 13 in the thickness direction.

以上のように構成されるタンクカバー１０は、その開口端部を甲板４上に当接させた状態で船体２に固定される。船体２に固定されたタンクカバー１０の頂部（本実施形態では天井平板部１３）は、甲板室７よりも低く位置する。これにより、甲板室７における船首方向の視界がタンクカバー１０によって遮られることを防止できる。   The tank cover 10 configured as described above is fixed to the hull 2 with its opening end abutted on the deck 4. The top portion of the tank cover 10 fixed to the hull 2 (the ceiling flat plate portion 13 in this embodiment) is located lower than the deck room 7. Accordingly, it is possible to prevent the view in the bow direction in the deck chamber 7 from being blocked by the tank cover 10.

図４に示すように、機械室２０は、液化天然ガス等の収容物をタンク３内に好適に保管するための複数の機械４０を配する役割を果たす。複数の機械４０には、例えばタンク３の収容空間の圧力を保持するためのコンプレッサ（ガスコンプレッサ）等が含まれる。また、複数の機械４０には、例えばタンク３内の収容物を燃料として主機関９に供給するためのコンプレッサや加熱器等も含まれる。これら機械４０には、タンク３や主機関９に向けて延びる配管４１が接続されている。例えば機械４０からタンク３に向けて延びる配管４１は、天井平板部１３からタンクカバー１０の外側に突出する取合部３１に接続される。
機械室２０は、船体２（本実施形態では収容凹部５）及びタンクカバー１０により画成される複数のタンク３の収納領域のうち互いに隣り合う一対のタンク３の間の領域に収納される。 As shown in FIG. 4, the machine room 20 plays a role of arranging a plurality of machines 40 for suitably storing stored items such as liquefied natural gas in the tank 3. The plurality of machines 40 include, for example, a compressor (gas compressor) for maintaining the pressure in the storage space of the tank 3. Further, the plurality of machines 40 include, for example, a compressor and a heater for supplying the contents in the tank 3 to the main engine 9 as fuel. A pipe 41 extending toward the tank 3 and the main engine 9 is connected to these machines 40. For example, the pipe 41 extending from the machine 40 toward the tank 3 is connected to the coupling portion 31 protruding from the ceiling flat plate portion 13 to the outside of the tank cover 10.
The machine room 20 is stored in a region between a pair of adjacent tanks 3 among a plurality of storage regions of the tank 3 defined by the hull 2 (accommodating recess 5 in the present embodiment) and the tank cover 10.

本実施形態の機械室２０は、タンクカバー１０の内面に設けられる。具体的に説明すれば、本実施形態の機械室２０は、タンクカバー１０の一部とタンクカバー１０の内側に張り出して設けられた張出壁部２１とによって画成される。張出壁部２１は、機械室２０をタンク３の収容領域から独立した空間とするものであり、タンクカバー１０の内面側に開口する箱状に形成されている。張出壁部２１の開口端はタンクカバー１０の内面に接続される。   The machine room 20 of the present embodiment is provided on the inner surface of the tank cover 10. More specifically, the machine room 20 according to the present embodiment is defined by a part of the tank cover 10 and a projecting wall portion 21 that projects from the inside of the tank cover 10. The overhanging wall portion 21 makes the machine room 20 a space independent of the storage area of the tank 3, and is formed in a box shape that opens to the inner surface side of the tank cover 10. The open end of the overhanging wall portion 21 is connected to the inner surface of the tank cover 10.

本実施形態の機械室２０は、タンクカバー１０をなす頂壁部１１の下面（内面）に設けられている。
本実施形態では、図２，４に示すように、機械室２０の船幅方向の寸法が天井平板部１３の船幅方向の寸法よりも大きく、機械室２０の船幅方向の両端が天井平板部１３の船幅方向の両端よりも外側にはみ出している。このため、張出壁部２１の開口端は、天井平板部１３及び第一傾斜平板部の下面（内面）に接続される。
また、本実施形態では、複数の機械４０が天井平板部１３及び第一傾斜平板部１４の下面に対向する機械室２０の底面に配されている。また、各機械４０から延びる配管４１は天井平板部１３を貫通してタンクカバー１０（機械室２０）の外側に延びている。 The machine room 20 of the present embodiment is provided on the lower surface (inner surface) of the top wall portion 11 that forms the tank cover 10.
In this embodiment, as shown in FIGS. 2 and 4, the dimension in the ship width direction of the machine room 20 is larger than the dimension in the ship width direction of the ceiling flat plate portion 13, and both ends of the machine room 20 in the ship width direction are ceiling flat plates. The portion 13 protrudes outward from both ends in the ship width direction. For this reason, the open end of the overhanging wall portion 21 is connected to the lower surface (inner surface) of the ceiling flat plate portion 13 and the first inclined flat plate portion.
Moreover, in this embodiment, the some machine 40 is distribute | arranged to the bottom face of the machine room 20 facing the lower surface of the ceiling flat plate part 13 and the 1st inclination flat plate part 14. FIG. Further, the pipe 41 extending from each machine 40 extends through the ceiling flat plate portion 13 to the outside of the tank cover 10 (machine room 20).

さらに、本実施形態の機械室２０は、図１，２に示すように、甲板室７との間に一のタンク３Ａを挟み込む位置に配される。本実施形態では、甲板室７が船体２の船尾側に配されているため、機械室２０は船体２の船尾側に配される。   Furthermore, as shown in FIGS. 1 and 2, the machine room 20 of the present embodiment is disposed at a position where one tank 3 </ b> A is sandwiched between the deck room 7. In this embodiment, since the deck room 7 is arranged on the stern side of the hull 2, the machine room 20 is arranged on the stern side of the hull 2.

以上のように構成される本実施形態の運搬船１によれば、機械室２０がタンクカバー１０によって画成されたタンク３の収納領域に設けられることで、機械室２０の設置に基づいて運搬船１が受ける風（特に前方や横方向からの風）の影響を無くすことができる。したがって、機械室２０の設置による運搬船１の操船性低下及び燃費低下を防止することができる。
また、機械室２０は、互いに隣り合う一対のタンク３間の領域に配されるため、船体２に対する複数のタンク３の設置を阻害することも防止できる。 According to the transport ship 1 of the present embodiment configured as described above, the machine room 20 is provided in the storage area of the tank 3 defined by the tank cover 10, so that the transport ship 1 is based on the installation of the machine room 20. It is possible to eliminate the influence of wind (especially wind from the front or side). Accordingly, it is possible to prevent a decrease in ship maneuverability and fuel consumption due to the installation of the machine room 20.
Further, since the machine room 20 is arranged in a region between a pair of adjacent tanks 3, it is possible to prevent the installation of the plurality of tanks 3 with respect to the hull 2 from being hindered.

また、機械室２０がタンクカバー１０の内面に設けられるため、船体２に配置されるタンク３の形状や大きさやタンク３同士の間隔にあわせて機械室２０を設けたタンクカバー１０を用意すればよく、同一あるいは同型の船体２を用いることが可能となる。   Further, since the machine room 20 is provided on the inner surface of the tank cover 10, if the tank cover 10 provided with the machine room 20 is prepared in accordance with the shape and size of the tank 3 arranged in the hull 2 and the interval between the tanks 3. It is possible to use the same or the same type of hull 2.

さらに、機械室２０がタンクカバー１０の頂壁部１１の下面（内面）に設けられることで、機械室２０から各タンク３の取合部３１までの距離が短くなり、機械室２０に配された各種機械４０と各タンク３とを接続する配管４１の長さを短く設定することが可能となる。
したがって、各種機械４０とタンク３とを接続する配管４１を設けるためのコストを抑えることができる。 Furthermore, since the machine room 20 is provided on the lower surface (inner surface) of the top wall portion 11 of the tank cover 10, the distance from the machine room 20 to the coupling portion 31 of each tank 3 is shortened, and the machine room 20 is arranged in the machine room 20. In addition, the length of the pipe 41 connecting the various machines 40 and the tanks 3 can be set short.
Therefore, the cost for providing the piping 41 that connects the various machines 40 and the tank 3 can be reduced.

さらに、本実施形態によれば、機械室２０が乗員の居住区として機能する甲板室７の近くに配されるため、乗員は短時間で機械室２０に到着することができる。すなわち、乗員は機械室２０内の各種機械の保守点検や操作を速やかに行うことが可能となる。   Furthermore, according to this embodiment, since the machine room 20 is arranged near the deck room 7 that functions as a occupant's residence, the occupant can reach the machine room 20 in a short time. That is, the occupant can quickly perform maintenance inspection and operation of various machines in the machine room 20.

また、本実施形態によれば、機械室２０が船体２の船尾側の端部に配されているため、主機関９とタンク３とを接続する配管４１の長さも短く設定できる。
したがって、上記配管４１を設けるためのコストを抑えることができる。 In addition, according to the present embodiment, since the machine room 20 is arranged at the stern side end of the hull 2, the length of the pipe 41 connecting the main engine 9 and the tank 3 can be set short.
Therefore, the cost for providing the piping 41 can be suppressed.

〔第二実施形態〕
次に、本発明の第二実施形態について、図５を参照して、第一実施形態との相違点を中心に説明する。なお、第一実施形態と共通する構成については、同一符号を付し、その説明を省略する。 [Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. 5 centering on differences from the first embodiment. In addition, about the structure which is common in 1st embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

本実施形態の運搬船は、第一実施形態の運搬船１と同様の船体２、複数のタンク３、タンクカバー１０及び機械室２０を備える（図１〜３参照）。
図５に示すように、本実施形態のタンクカバー１０は、第一実施形態と同様の頂壁部１１及び側壁部１２を備える。ただし、本実施形態では、頂壁部１１が天井平板部１３のみを備える。そして、側壁部１２の第二傾斜平板部１５が、天井平板部１３の船幅方向の両端に直接接続されている。 The carrier ship of this embodiment is provided with the same hull 2, the several tank 3, the tank cover 10, and the machine room 20 as the carrier ship 1 of 1st embodiment (refer FIGS. 1-3).
As shown in FIG. 5, the tank cover 10 of this embodiment includes a top wall portion 11 and a side wall portion 12 similar to those of the first embodiment. However, in the present embodiment, the top wall portion 11 includes only the ceiling flat plate portion 13. The second inclined flat plate portion 15 of the side wall portion 12 is directly connected to both ends of the ceiling flat plate portion 13 in the ship width direction.

本実施形態の機械室２０は、第一実施形態と同様に、船体２及びタンクカバー１０により画成される複数のタンク３の収納領域のうち互いに隣り合う一対のタンク３の間の領域に収納される。また、機械室２０は、図５に示すように、第一実施形態と同様に、タンクカバー１０をなす頂壁部１１の下面（内面）に設けられている。ただし、本実施形態の機械室２０は、天井平板部１３の下面にのみ設けられている。すなわち、本実施形態の機械室２０の船幅方向の寸法は、天井平板部１３の船幅方向の寸法以下に設定されている。これにより、機械室２０を画成する張出壁部２１の開口端は、天井平板部１３の下面（内面）に接続される。   The machine room 20 of this embodiment is stored in a region between a pair of adjacent tanks 3 among the storage regions of the plurality of tanks 3 defined by the hull 2 and the tank cover 10 as in the first embodiment. Is done. Moreover, the machine room 20 is provided in the lower surface (inner surface) of the top wall part 11 which makes the tank cover 10 similarly to 1st embodiment, as shown in FIG. However, the machine room 20 of the present embodiment is provided only on the lower surface of the ceiling flat plate portion 13. That is, the dimension of the machine room 20 of the present embodiment in the ship width direction is set to be equal to or less than the dimension of the ceiling flat plate portion 13 in the ship width direction. Thereby, the open end of the overhanging wall portion 21 that defines the machine room 20 is connected to the lower surface (inner surface) of the ceiling flat plate portion 13.

上記のように機械室２０を設ける場合、天井平板部１３の船幅方向の寸法は、船体２の船幅方向の寸法の５０％以上かつ７５％以下となっているとよい。
さらに、本実施形態では、機械室２０上に位置する天井平板部１３の上面上には、機械４０からタンクカバー１０の外側に延びる配管４１に加え、配管４１に設けられるバルブ４２、乗員がバルブ４２まで近づくための操作台４３等、機械４０に関係する構造物が設けられている。バルブ４２及び操作台４３は、機械４０の近くに配されていることが好ましいため、天井平板部１３の上面上のうち機械室２０上に配される。図５において、操作台４３は船体２の船首尾方向（図５において紙面の厚さ方向）に延びているが、これに限ることはない。 When the machine room 20 is provided as described above, the size of the ceiling flat plate portion 13 in the ship width direction may be 50% or more and 75% or less of the size of the hull 2 in the ship width direction.
Furthermore, in this embodiment, on the upper surface of the ceiling flat plate portion 13 located on the machine room 20, in addition to the pipe 41 extending from the machine 40 to the outside of the tank cover 10, a valve 42 provided in the pipe 41, Structures related to the machine 40, such as an operation table 43 for approaching to 42, are provided. Since the valve 42 and the operation table 43 are preferably arranged near the machine 40, the valve 42 and the operation table 43 are arranged on the machine room 20 in the upper surface of the ceiling flat plate portion 13. In FIG. 5, the operation console 43 extends in the fore-and-aft direction of the hull 2 (the thickness direction of the paper surface in FIG. 5), but is not limited thereto.

本実施形態の運搬船によれば、第一実施形態と同様の効果を奏する。
さらに、本実施形態によれば、機械室２０が天井平板部１３の下面に設けられることで、配管４１、バルブ４２、操作台４３等の構造物を機械室２０上に位置する平坦な天井平板部１３の上面上に容易に配置することが可能となる。 According to the carrier ship of this embodiment, there exists an effect similar to 1st embodiment.
Furthermore, according to the present embodiment, the machine room 20 is provided on the lower surface of the ceiling flat plate portion 13, so that structures such as the pipe 41, the valve 42, and the operation table 43 are flat ceiling flat plates positioned on the machine room 20. It becomes possible to arrange on the upper surface of the part 13 easily.

また、本実施形態の運搬船において、天井平板部１３の船幅方向の寸法が船体２の船幅方向の寸法の５０％以上となっていることで、仮に隣り合う一対のタンク３同士の隙間が狭くても、機械室２０の船幅方向の寸法、及び機械室２０の高さ寸法を十分に確保できるため、複数の各種機械４０を同一の機械室２０に集約して配することが可能となる。
また、天井平板部１３の上面の面積が船幅方向に広いため、天井平板部１３の上面のうち機械室２０上に設ける構造物（配管４１、バルブ４２及び操作台４３等）を船幅方向に分散して配置することが可能となる。このため、天井平板部１３の上面に配された構造物の高さ寸法を低く抑えることができる。例えば、天井平板部１３の上面から操作台までの高さを、３２００ｍｍ以下に抑えることができる。したがって、上記構造物に基づいて運搬船が受ける風（特に前方や横方向からの風）の影響を小さく抑え、運搬船の操船性向上及び燃費向上を図ることができる。 Moreover, in the transport ship of this embodiment, the dimension of the ceiling flat plate part 13 in the ship width direction is 50% or more of the dimension in the ship width direction of the hull 2, so that a gap between a pair of adjacent tanks 3 is temporarily provided. Even if it is narrow, the dimensions of the machine room 20 in the ship width direction and the height of the machine room 20 can be sufficiently secured, so that a plurality of various machines 40 can be concentrated and arranged in the same machine room 20. Become.
Moreover, since the area of the upper surface of the ceiling flat plate portion 13 is wide in the ship width direction, structures (pipe 41, valve 42, operation table 43, etc.) provided on the machine room 20 on the upper surface of the ceiling flat plate portion 13 are arranged in the ship width direction. It is possible to disperse and arrange them. For this reason, the height dimension of the structure arranged on the upper surface of the ceiling flat plate portion 13 can be kept low. For example, the height from the upper surface of the ceiling flat plate portion 13 to the operation table can be suppressed to 3200 mm or less. Therefore, it is possible to suppress the influence of the wind (especially wind from the front or side) received by the transport ship based on the structure, and to improve the maneuverability and fuel consumption of the transport ship.

上記した第二実施形態の構成は、例えば第一実施形態の構成と組み合わせることが可能である。例えば、第二実施形態の配管４１、バルブ４２及び操作台４３等の構造物は、第一実施形態のタンクカバー１０の天井平板部１３の上面上に設けられてもよい。   The configuration of the second embodiment described above can be combined with the configuration of the first embodiment, for example. For example, structures such as the piping 41, the valve 42, and the operation table 43 according to the second embodiment may be provided on the upper surface of the ceiling flat plate portion 13 of the tank cover 10 according to the first embodiment.

以上、本発明の詳細について説明したが、本発明は上述した実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることができる。
例えば、機械室２０は、頂壁部１１の下面（内面）に設けられることに限らず、例えば側壁部１２の内面に設けられてもよい。
また、機械室２０は、上記実施形態のように一か所のみに設けられることに限らず、例えば複数個所に分けて設けられてもよい。 Although the details of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, the machine room 20 is not limited to being provided on the lower surface (inner surface) of the top wall portion 11, and may be provided on the inner surface of the side wall portion 12, for example.
Further, the machine room 20 is not limited to being provided at one place as in the above-described embodiment, and may be provided at a plurality of places, for example.

また、上記実施形態のタンクカバー１０は、その製造容易性を考慮して断面多角形状に形成されているが、例えば船首尾方向に直交する断面で少なくとも一部が円弧状に湾曲して形成されてもよい。例えばタンクカバーの頂壁部１１及び側壁部１２の一方のみが円弧状に湾曲して形成されてもよいし、頂壁部１１及び側壁部１２の両方が円弧状に湾曲して形成されてもよい。   In addition, the tank cover 10 of the above embodiment is formed in a polygonal cross-section in consideration of its manufacturability. For example, at least part of the tank cover 10 is curved in a circular arc shape in a cross-section orthogonal to the bow-stern direction. May be. For example, only one of the top wall portion 11 and the side wall portion 12 of the tank cover may be formed to be curved in an arc shape, or both the top wall portion 11 and the side wall portion 12 may be formed to be curved in an arc shape. Good.

１…運搬船、２…船体、３…タンク、３Ａ…一のタンク、３１…取合部、７…甲板室、１０…タンクカバー、１１…頂壁部、１３…天井平板部、２０…機械室、４０…機械、４１…配管（構造物）、４２…バルブ（構造物）、４３…操作台（構造物） DESCRIPTION OF SYMBOLS 1 ... Transport ship, 2 ... Hull, 3 ... Tank, 3A ... One tank, 31 ... Joint part, 7 ... Deck room, 10 ... Tank cover, 11 ... Top wall part, 13 ... Ceiling flat part, 20 ... Machine room , 40 ... Machine, 41 ... Piping (structure), 42 ... Valve (structure), 43 ... Operation table (structure)

Claims (7)

船体と、
該船体から上方に突出するように船首尾方向に沿って配置され、内部が収容空間とされた複数のタンクと、
これら複数のタンクを船首尾方向に連続して覆うタンクカバーと、
前記船体及び前記タンクカバーにより画成される前記複数のタンクの収納領域のうち互いに隣り合う一対のタンクの間の領域に収納される機械室と、
を備えることを特徴とする運搬船。 The hull,
A plurality of tanks arranged along the bow-stern direction so as to protrude upward from the hull, the interior of which is an accommodation space;
A tank cover that continuously covers the plurality of tanks in the bow-stern direction;
A machine room stored in a region between a pair of adjacent tanks among the storage regions of the plurality of tanks defined by the hull and the tank cover;
A transport ship comprising: 前記機械室が、前記タンクカバーの内面に設けられることを特徴とする請求項１に記載の運搬船。   The transport ship according to claim 1, wherein the machine room is provided on an inner surface of the tank cover. 前記タンクカバーが、複数のタンクの上方を覆う頂壁部を備え、
前記機械室が、前記頂壁部の下面に設けられることを特徴とする請求項１又は請求項２に記載の運搬船。 The tank cover includes a top wall portion covering the upper side of the plurality of tanks;
The transport ship according to claim 1, wherein the machine room is provided on a lower surface of the top wall portion. 前記頂壁部が、複数のタンクの上方に位置して船幅方向に平板状に延びる天井平板部を備え、
前記機械室が、前記天井平板部の下面にのみ設けられることを特徴とする請求項３に記載の運搬船。 The top wall portion is provided above a plurality of tanks and includes a ceiling flat plate portion extending in a flat plate shape in the ship width direction,
The transport machine according to claim 3, wherein the machine room is provided only on a lower surface of the ceiling flat plate portion. 前記天井平板部の船幅方向の寸法が、前記船体の船幅方向の寸法の５０％以上かつ７５％以下であることを特徴とする請求項４に記載の運搬船。   5. The transport ship according to claim 4, wherein a dimension in the ship width direction of the ceiling flat plate portion is 50% or more and 75% or less of a dimension in the ship width direction of the hull. 前記船体上に設けられ、前記複数のタンクの船首側あるいは船尾側の端部に隣り合せて配置された甲板室を備え、
前記機械室が、前記甲板室との間に一のタンクを挟み込む位置に配されることを特徴とする請求項１から請求項５のいずれか一項に記載の運搬船。 A deck room provided on the hull, arranged adjacent to the bow side or stern side end of the plurality of tanks,
The transport ship according to any one of claims 1 to 5, wherein the machine room is disposed at a position where one tank is sandwiched between the machine room and the deck room. 前記機械室が、前記船体の船尾側の端部に配されていることを特徴とする請求項１から請求項６のいずれか一項に記載の運搬船。   The carrier machine according to any one of claims 1 to 6, wherein the machine room is arranged at an end portion on a stern side of the hull.
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