Provided is a drainage structure for a ballast tank, the drainage time of residual ballast water being not significantly prolonged even if the number of water through holes and the opening area are reduced. The total opening area of a plurality of water through holes provided in each portion of a plurality of longitudinal frame members, a plurality of beam members, and a plurality of floor members, which respectively face a plurality of small compartments included in three or four rows of small compartment rows in the ship width direction, is within the plurality of small compartments within a predetermined region centered on the small compartment provided with the suction inlet. The distance from the small divided chamber provided with the suction inlet becomes smaller with the small divided chamber as the center. The beam members and the longitudinal frame members of a part or all of the plurality of small compartments facing a part or all of the ship width direction small compartment rows other than the ship width direction small compartment rows of three rows or four rows are not provided with water through holes.
提供一种即使减少通水孔的数量及开口面积,残留压载水的排水时间也不会显著变长的压载舱的排水结构。在分别面向3列或4列的船宽方向小划分室列中包含的多个小划分室的多个纵框架件、多个梁件以及多个地板件的各部分上设置的多个通水孔的合计开口面积在以设置有吸入口的小划分室为中心的规定的区域内的多个小划分室中,随着以设置有吸入口的小划分室为中心远离该小划分室变小。在面向3列或4列的船宽方向小划分室列以外的船宽方向小划分室列的一部分或全部的船宽方向小划分室列的多个小划分室的一部分或全部的小划分室的梁件及纵框架件的各部分未设置有通水孔。
Drainage structure of ballast tank
压载舱的排水结构
2023-05-19
Patent
Electronic Resource
Chinese
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |