Method for manufacturing large tanks
AssigneeWikstrom International AB
InventorCarl H. T. Blankenburg
Life of this patent
Estimating the term…
Abstract
A method for manufacturing large tanks according to the "from the top and down" method, comprising manufacturing the roof of the tank first at ground level and then successively attaching generally cylindrical plates one below the other as the completed part of the tank is raised in stages. The plates each have lifting lugs which alternately cooperate with lifting units for successively raising the partially completed tank and with a guide rail which is used for guiding of a welding machine. The guide rail is preferably adjustably suspended relative to each lug so that the distance from the guide rail to the lower edge of the plate sweep, i.e. where the welding seam is to be made, can be precisely adjusted.
Claims11
In a method of manufacturing large tanks according to the "from the top and down" principle, whereby the roof of the tank is manufactured first at ground level, and successive plate sweeps, each having lugs mounted thereon, are attached one below the other, the completed part of the tank being raised in stages and a new plate sweep being fixed under the plate sweep immediately above it so that the tank grows from below, the improvement comprising:
- mounting a plurality of lifting units around a plate sweep:
- engaging said lifting units with lugs of said plate sweep to raise the finished part of the tank:
- placing another plate sweep under the raised part of the tank:
- mounting a welding machine guide rail to said lugs of one of said raised plate sweeps:
- and
- welding a seam between two of said plate sweeps with a welding machine guided on said guide rail.
Dependencies are inferred from the claim text.