To provide a drainage structure for a ballast tank not having time for draining residual ballast water from the ballast tank extremely prolonged even when water passing holes are decreased from a conventional number.SOLUTION: Four small compartments (2-1) to (2-4) included in a horizontal direction small compartment row 20 W are in a communicated state through three water passage holes 25 respectively going through three pieces of vertical frame material 17 positioned in the horizontal direction small compartment row 20W. In addition, each of a plurality of small compartments respectively included in four vertical direction small compartment rows 20 L composed of a plurality of small compartments [(1-1) to (4-1), (1-2) to (4-2), (1-3) to (4-3), (1-4) to (4-4)] lined up in the vertical direction L of a vessel including one of four small compartments (2-1) to (2-4) composing the horizontal direction small compartment row 20W are in a communicated state by a plurality of water passage holes 25 each going though plurality of floor material 13.SELECTED DRAWING: Figure 2

    【課題】従来より通水孔を減らしても、バラストタンクから残留バラスト水を排水する時間を著しく長くすることがないバラストタンクの排水構造を提供する。【解決手段】横方向小区画室列20Wに含まれる4つの小区画室(2−1)〜(2−4)が、横方向小区画室列20W内に位置する3本の縦フレーム材17をそれぞれ貫通する3つの通水孔25を介して連通状態にある。また横方向小区画室列20Wを構成する4つの小区画(2−1)〜(2−4)の1つを含んで船舶の縦方向Lに並ぶ複数の小区画室[(1−1)〜(4−1),(1−2)〜(4−2),(1−3)〜(4−3),(1−4)〜(4−4)]からなる4つの縦方向小区画室列20Lにそれぞれ含まれる複数の小区画室のそれぞれが、複数のフロア材13をそれぞれ貫通する複数の通水孔25によって連通状態にある。【選択図】 図2


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    Title :

    DRAINAGE STRUCTURE FOR BALLAST TANK


    Additional title:

    バラストタンクの排水構造


    Contributors:

    Publication date :

    2021-11-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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