C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
38/6
C21D 9/573 (2006.01) C21D 11/00 (2006.01) F27D 15/02 (2006.01)
Patent
CA 1234977
ABSTRACT OF THE INVENTION COOLING APPARATUS FOR METAL STRIP The invention relates to apparatus of the kind in which the strip (2) is passed in contact partly around the outer circumferences of a number of spaced cooling rolls (1,1' etc) through which coolant passes. In conventional apparatus of this kind numerous problems arise with respect to the limited range of temperature that can be applied, due to the coolant used, and the fact that irregularities can occur widthwise of the strip. The invention aims to overcome these problems and is characterized in that temperature detection means (17,17' etc) are provided for detecting the temperature of the strip (2) before contact with each said cooling roll (1,1' etc), in that coolant temperature adjusting means (16) are provided which, in dependence upon the detected temperature (Ts1), are adapted to adjust the temperature of the coolant passing through each cooling roll to a range (Tw1) which limits the temperature drop (Tsm) such that unacceptable irregularities or distortions in the configuration of the strip cannot occur, and in that the coolant used for each cooling roll is selected with a boiling point appropriate to the respective detected temperature for each roll. In a preferred arrangement, further temperature detection means (18) are provided for each cooling roll to detect the temperature of the coolant and output signals (Ts and Tw respectively) from both detection means (17,18) are inputted to a control (19) for regulating a flow rate valve (16).
479265
Fukushima Takeo
Makihara Katsumi
Samejima Ichiro
Suganuma Namio
Takahashi Seiichi
Kawasaki Steel Corporation
Mitsubishi Jukogyo Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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