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US 5,634,481 AGranted
Strip treatment installation
AssigneeClecim
InventorJean-Luc Legoupil
Life of this patent
Estimating the term…
Abstract
An installation for pickling rolled metal strip in order to remove oxides formed thereon. The strip is fed horizontally through an acid solution bath over a series of deflecting rollers rotating about axes perpendicular to the feed direction of the strip and defining, within a single vessel, outward and return paths comprising at least three superposed sections, and walls dividing the vessel into at least two superposed treatment cells of a height which is low enough for the treatment liquid to be driven along by the feeding of the strip by pumping action.
Claims17
An installation for treating a strip product comprising:
- (a) means for controlling the feeding of a strip product in a longitudinal direction F inside a vessel containing a treatment liquid;
- (b) said vessel having a bottom, two longitudinal walls parallel to said longitudinal feeding direction and two transverse walls, respectively upstream and downstream in said feeding direction F, and a cover, said upstream and downstream transverse walls being respectively provided with an input and an output for said strip;
- (c) an upstream deflector assembly comprising at least first and second deflecting rollers each mounted for rotation about an axis perpendicular to the longitudinal feed direction, said first roller being located adjacent said upstream transverse wall and having a lower generating line placed at a first height above said bottom of said vessel, and said second roller being offset toward the inside of said vessel and having a lower generating line placed at a second height above said bottom of said vessel, said second height being greater than said first height;
- (d) a downstream deflector assembly comprising at least two deflecting rollers each mounted for rotation about an axis perpendicular to said longitudinal feed direction, respectively a first downstream roller located adjacent to said downstream transverse wall and having a lower generating line placed substantially at said first height above said bottom, and a second downstream roller having a lower generating line placed substantially at said second height above said bottom;
- (e) said deflecting roller assemblies defining, inside said vessel, an outward and return path of said strip product comprising at least three superposed sections, extending respectively between said deflecting rollers, respectively a first outward section extending at a first horizontal level between said first upstream and downstream rollers, and a second return section extending between said second rollers, respectively downstream roller and upstream roller, and at least a third outward section between said second upstream roller and said output of said vessel;
- (f) at least two long, oblong, substantially flat separating walls, each extending across an entire width of said vessel between said longitudinal walls, respectively at first wall extending between said first deflecting rollers, at an intermediate level between said first section and said second section of said strip, and a second wall extending between said second deflecting rollers, above said second section of said strip;
- (g) said at least two separating walls dividing said vessel into at least two superposed treatment cells of limited height and respectively transversed by said first outward section and said second return section of said strip;
- (h) a treatment liquid being introduced into each said cell of said vessel, at a flow rate and pressure sufficient to fill it completely.
5 more elements
Dependencies are inferred from the claim text.