Device for hydraulically adjusting the rollers of strand...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 11/128 (2006.01) B22D 11/16 (2006.01) F15B 13/02 (2006.01)

Patent

CA 2340351

The invention relates to a device for hydraulically adjusting components, especially the rollers of strand guiding segments of a continuous casting installation with hydraulic cylinders (2) which are subdivided into a cylinder chamber (9) and an annular cylinder chamber (11) by each one piston (12) comprising a piston rod (13). The cylinder chambers (9, 11) can be alternatively, reciprocally and simultaneously connected to a pressure source (7) and to a pressure sink (5) by control elements. The disadvantages of prior art continuous valves used as control elements, primarily their high level of sensitivity with regard to cleanness and lubricity of the working fluid, are avoided in that control valves are provided as control elements. Said control valves are non-sensitive with regard to cleanness and to the use of an oil-in-water emulsion used as a working fluid.

L'invention concerne un dispositif pour le réglage hydraulique de composants, notamment des rouleaux des segments de guidage du brin d'une installation de coulée continue, comportant des vérins hydrauliques (2) qui sont divisés, par un piston (12) et sa tige (13), en une chambre de vérin (9) et une chambre de vérin annulaires (11). Les chambres de vérin (9, 11) peuvent être reliées, par des organes de commande, en alternance et en sens inverse, ainsi que simultanément, avec une source de pression (7) et un puits de pression (5). Les inconvénients des soupapes fixes utilisées jusqu'à présent comme organes de commande, surtout leur grande sensibilité à la pureté et au pouvoir lubrifiant du liquide de travail, sont évités grâce au fait que des soupapes de commande sont prévues comme organes de commande. Ces dernières sont insensibles à la pureté et à l'utilisation d'une émulsion eau-huile comme liquide de travail.

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