Patent ID: 9133640
Filing Date: 2015-09-15
Classification: B23K,E02D,E04H,F16M

Abstract:
1. A process for building a tank by “from top to down assembly”, wherein the tank is built by welding several rings to one another, wherein each ring comprises a plurality of metal sheets joined together, the tank building process comprising: placing supporting base devices in a circle which defines a periphery of a tank to be built, linking said supporting base devices by horizontal rails; forming a ring strip by welding said metal sheets in at least one fixed cabinet for vertical welding and alignment of said metal sheets; said welding of the metal sheets comprising a step in which said metal sheets are aligned vertically by at least two vertical presses; said welding of the metal sheets being performed by welding robots sliding along vertical calibrated rails on opposing sides of said vertical presses to form the ring strip; joining ends of the ring strip together to form a first ring; and raising the first ring up to an upper ring wherein the forming of another ring strip could be simultaneous performed with horizontal welding between the first ring and the upper ring; wherein each supporting base device comprises at least two ring strip guiding devices, one guiding device on an internal circle which defines a final size of the tank and the other guiding device on an external circle, wherein ring strips are received on the guiding devices on the external circle while the joining to form the first ring, the raising, and the horizontal welding are taking place on the guiding devices on the inner circle.