Equipment for the straightening of deformed electrolysis potshells, in particular for aluminium molten-bath electrolysis

Equipment for straightening of deformed electrolysis potshells, for aluminium molten-bath electrolysis, with an elongate transportable and displaceable straightening beam (14) extending over a distance between at least two opposite long sidewalls (12, 13) of a potshell and which has at each of two end regions of the beam a straightening jaw (15, 16) with a downwardly open U-profile-shaped through orifice (17, 18), the two straightening jaws being capable of being positioned with each respective through orifices onto a top side of the potshell sidewalls (12, 13) lying opposite one another, in the working position of the straightening equipment a centring unit (20) connected to the straightening beam (14) being seated on the bottom of the potshell to be straightened, wherein:

• a) in or on U-legs of the straightening jaws (15, 16) is arranged in each case at least one hydraulic straightening ram (25, 26, 27, 29) coming to lie parallel to the potshell bottom (21) and approximately perpendicularly to the potshell sidewall (12, 13) and serving as a straightening tool, such that at least four straightening rams lie along a line of action parallel to the potshell bottom;
• and
• b) while one straightening jaw (15), by the corresponding straightening ram (27) being extended, is applying a straightening force, on the potshell sidewall (12), the other straightening jaw (16) is firmly braced with both the outer and the inner straightening ram (29, 26) extended, and with the top side of the opposite potshell sidewall (13) acting as a captively fixed counterbearing.