公开(公告)号：US10450039B2

公开(公告)日：2019-10-22

申请号：US15563821

申请日：2016-03-15

申请人： MITSUBISHI HEAVY INDUSTRIES, LTD.

发明人： Takashi Okafuji ,  Kazuhiro Hirota ,  Ryusuke Takada ,  Michihisa Watanabe ,  Kazuhiro Miura

IPC分类号： B63B25/16 ,  F17C3/00 ,  F17C13/08 ,  B63B3/14 ,  B63B25/08

摘要： To provide a non-spherical tank which includes: a circular cylindrical portion; a top portion disposed continuously with an upper side of the circular cylindrical portion; and a bottom portion disposed continuously with a lower side of the circular cylindrical portion, wherein the top portion includes: a spherical shell portion which is formed of a portion of a spherical body having a radius R1, and is disposed at an upper end of the top portion; and a toroidal portion which is disposed continuously with the upper side of the circular cylindrical portion and with a lower side of the spherical shell portion respectively, and is formed of a portion of a spherical body having a radius R2 smaller than the radius R1, and an expression 1.0

公开(公告)号：US09868493B2

公开(公告)日：2018-01-16

申请号：US14785843

申请日：2014-06-05

申请人： MITSUBISHI HEAVY INDUSTRIES, LTD.

发明人： Hirotomo Ohtsuka ,  Satoshi Miyazaki ,  Michihisa Watanabe

IPC分类号： B63B25/16 ,  F17C13/00

CPC分类号： B63B25/16 ,  F17C13/00 ,  F17C13/002 ,  F17C2201/0104 ,  F17C2201/0109 ,  F17C2201/0123 ,  F17C2201/0128 ,  F17C2201/032 ,  F17C2201/052 ,  F17C2203/0604 ,  F17C2203/0636 ,  F17C2209/221 ,  F17C2209/232 ,  F17C2209/234 ,  F17C2221/033 ,  F17C2221/035 ,  F17C2223/0153 ,  F17C2223/0161 ,  F17C2223/033 ,  F17C2223/036 ,  F17C2260/011 ,  F17C2260/012 ,  F17C2260/016 ,  F17C2270/0105

摘要： Provided is an independent tank, and a manufacturing method therefor, for which local bending stress occurring on the vicinity of a boundary portion (welded portion) can be reduced without increasing plate thickness. An independent tank has at least one curvature change portion in which the curvature along the axial direction of plate members that form the tank changes along the axial direction. Both the inner peripheral surface and the outer peripheral surface of the plate member on the small curvature side are not flush with respect to the inner peripheral surface and the outer peripheral surface of the plate member on the large curvature side. The plate thickness center of the plate member on the small curvature side is offset toward the radial direction inner side or the radial direction outer side with respect to the plate thickness center of the plate on the large curvature side.