U-shaped iron core transporting/assembling method, and u-shaped iron core transporting/assembling tank

A U-shaped iron core transporting/assembling method in which a U-shaped iron core of a transformer is disassembled into a first leg iron core, a second leg iron core, and a lower-yoke iron core for transportation and reassembled after the transportation, said method comprising:

• an in-factory iron core assembling step of assembling the U-shaped iron core in a manufacturing factory of the U-shaped iron core;
• a U-shaped iron core housing step of housing, after the in-factory iron core assembling step, the U-shaped iron core in a tank that can be divided into a first leg iron core tank and a second leg iron core tank each having an opening/closing opening portion;
• a lower-yoke iron core separating step of separating, after the U-shaped iron core housing step, the lower-yoke iron core from the first leg iron core and the second leg iron core in a state where the positions of the first leg iron core and the second leg iron core are fixed in the tank;
• a lower-yoke iron core assembling tank transferring step of transferring, after the lower-yoke iron core separating step, the lower-yoke iron core to a lower-yoke iron core assembling tank;
• a tank dividing step of dividing, after the lower-yoke iron core assembling tank transferring step, the tank into the first leg iron core tank and the second leg iron core tank for individually housing the first leg iron core and the second leg iron core;
• a transporting step of individually transporting in a sideways attitude, after the tank dividing step, the first leg iron core, the second leg iron core, and the lower-yoke iron core housed respectively in the first leg iron core tank, the second leg iron core tank, and the lower-yoke iron core transporting tank in a state where the opening portions of the first leg iron core tank and the second leg iron core tank are closed;
• a tank connecting step of connecting, after the transporting step, the opening portions of the first leg iron core tank, the second leg iron core tank, and the lower-yoke iron core assembling tank with the opening portions of the first leg iron core tank and the second leg iron core tank opened while maintaining the first leg iron core, the second leg iron core, and the lower-yoke iron core in a sideways attitude;
• an iron core connecting step of moving, after the tank connecting step, the lower-yoke iron core to the inside of the first leg iron core tank and the second leg iron core tank connecting the first leg iron core, the second leg iron core, and the lower-yoke iron core;
• a lower-yoke iron core assembling tank separating step of separating, after the iron core connecting step, the lower-yoke iron core assembling tank from the first leg iron core tank and the second leg iron core tank while maintaining a connecting state between the first leg iron core tank and the second leg iron core tank;
• a bottom plate fitting step of fitting, after the lower-yoke iron core assembling tank separating step, a bottom plate to the opening portions of the first leg iron core tank and the second leg iron core tank generated by the separation of the lower-yoke iron core assembling tank therefrom so as to close the opening portions;
• and
• an erecting step of erecting, after the bottom plate fitting step of fitting, the first leg iron core tank and the second leg iron core tank with that the bottom plate facing down.

A U-shaped iron core transporting/assembling tank which can be divided into at least a first leg iron core tank for housing a first leg iron core and transporting it to an installation site, a second leg iron core tank for housing a second leg iron core and transporting it to the installation site, and a lower-yoke iron core assembling tank, wherein

• the first leg iron core tank comprises:
• a first opening/closing longitudinal opening portion formed in one longitudinal side surface;
• and
• a first opening/closing short opening portion formed in an end surface perpendicular to the one longitudinal side surface,
• the second leg iron core tank comprises:
• a second opening/closing longitudinal opening portion formed in one longitudinal side surface;
• a second opening/closing short opening portion formed in the end surface perpendicular to the side surface in which the second opening/closing longitudinal opening portion is formed;
• and
• erection tank connecting means for connecting the second longitudinal opening portion which is opened in a state where the second leg iron core is housed in the second leg iron core tank and the first longitudinal opening portion which is opened in a state where the first leg iron core is housed in the first leg iron core tank for integration of the first leg iron core tank and the second leg iron core tank so as to constitute an erection tank such that the first short opening portion and the second short opening portion are arranged in a single plane so as to become one opening portion to which a bottom plate can be fitted, and
• the lower-yoke iron core assembling tank comprises:
• a third opening/closing opening portion which is formed in one longitudinal side surface of the lower-yoke iron core and through which the lower-yoke iron core can be carried in/out;
• and
• lower-yoke iron core assembling tank connecting means for connecting the third opening portion which is opened in a state where the lower-yoke iron core is housed in the lower-yoke iron core assembling tank and opened the first short opening portion and opened the second short opening portion of the erection tank housing the first leg iron core and the second leg iron core for integration of the erection tank and the lower-yoke iron core assembling tank.