Apparatus for making tanks from plates

Abstract

A new method and a new device for the construction of tanks from plates. The device comprises a cylindrical jacket for a vertical tank made from the plates. The plates are connected to one another to form from a bottom part with a ring attached thereto forming a bottom unit of the tank and an upper helically-shaped edge. A cover part is formed comprising a cover with a ring attached thereto, having a lower, correspondingly helically-shaped, edge. The bottom part is placed below the upper part whereafter space for the insertion of additional plates is provided through the stepwise displacement of the cover part relative to the bottom part along a helical line following the edge to make the jacket. The cover part is lifted along the helical line by a linear lifting movement and by a simultaneous rolling movement of the cover part to its dead weight to move along a surface which is inclined in the opposite sense to the inclination of the helical line. The said lifting and rolling movement of the cover part takes place several times in a timed sequence until a sufficient advance has been achieved to an extent which permits an additional plate to be inserted. The apparatus includes framing means which are fastened to the bottom part of the plates in assembled relation for the tank and further includes lifting means to lift the cover relative to the bottom part and also includes rollers on the frame with means to lift the rollers and lower them. Lifting slides are supported on lifting units and these slides are inserted between the cover part and the bottom part of the assembled plates to make the tank.

Dependencies are inferred from the claim text.