Plant for chemical treatment of a surface of a metal strip

Abstract

A plant is provided for chemical treatment of a surface of a material strip, particularly for pickling and / or rinsing the material strips, such as metal strips. At least one treatment stage includes guide rollers and squeezing rollers for the metal strip. The metal strip is run out of the chemical treatment plant (e.g., pickling plant) as close to the central position as possible so that a subsequent steering roller may operate without substantial difficulty. At least two rollers or two roller pairs, with one roller above and one roller below the metal strip, run in adjustable bearings on at least one side of the longitudinal axis of the plant. The adjustable bearings are synchronized with and parallel with the running direction of the metal strip. The adjustable roller assembly follows at least one treatment stage.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit under 35 U.S.C. § 119 of Austrian Patent Application No. A 839 / 2003, filed May 30, 2003, which is hereby incorporated by reference in its entirety. FIELD OF THE INVENTION [0002] The present invention relates to a plant for chemical treatment of the surface of a material. More particularly, the present invention relates to a plant for pickling and / or rinsing metal strips having at least one treatment stage, as well as guide and squeezing rolls for the metal strip. Still more particularly, the present invention relates to a treatment stage of a chemical plant having adjustable rollers to adjust the position of the metal strip being treated. BACKGROUND OF THE INVENTION [0003] Currently, a metal strip is guided through a pickling plant by moving the double squeezing rollers at the end of the final stage of the pickling plant in order to run the strip out of the rinsing tank in a sufficiently centered posit...

AI Technical Summary

Benefits of technology

The present invention relates to a chemical treatment plant for pickling materials. The invention includes at least two rollers or roller pairs, with one roller above and one below the material being treated. The rollers are adjustable and synchronized with the material's running direction. This allows for a steering influence on the material without requiring any widening of the chemical treatment plant. The rollers are also easier to seal off to prevent acid from escaping and avoiding shutdowns. The bearings of all synchronously adjustable rollers or roller pairs are mounted on a bracket that is adjustable in the longitudinal direction of the plant by a drive. This allows for improved adjustability and steering of the material to be treated. Another embodiment of the invention provides for the roller bearings of at least two rollers or roller pairs, formed by one roller above and one below the material, being mounted on each side in relation to the longitudinal axis of the plant on a bracket that is adjustable in the longitudinal direction of the plant by a drive. The drive is a fluid-operated working cylinder, such as a hydraulically or pneumatically actuated cylinder. The technical effects of the invention include improved alignment and steering of the material being treated, as well as easier sealing off of the rollers to prevent acid escape and shutdowns.

Problems solved by technology

The steering effect, however, is hampered by the subsequent squeezing rollers and requires sophisticated inductive measuring in protective tubes made of acid-resistant material.

This results in considerable wear at the steering ends and at the two squeezing roller pairs.

Due to the transverse movement of the PI roll, the structural design of the lateral seal of the squeezing rollers is complicated and the bearing center distance of the squeezing rollers has to be increased.

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