| 摘要 |
PURPOSE: An apparatus for detecting degreasing defects of the surface of a strip passing through an alkali tank is provided to cope with the degreasing defects by occasionally measuring a pollution at an arbitrary exact position along the width direction of a steel sheet which is proceeded for galvanization of the cold rolling process, thereby early checking degreasing defects. CONSTITUTION: The apparatus comprises a body(20) fixed at both sides of an exit of an alkali tank; a degreasing detection part(40) having a driving means of a pneumatic cylinder(42), a degreasing roller(60) which is a detecting means that is contacted with the surface of a strip by being rotated by the pneumatic cylinder, and a sensor contacting with a controller in which a standard value is set so as to judge whether the surface of the strip is poorly washed or not by measuring an alkali concentration stuck to the degreasing roller, wherein the degreasing detection part is installed on the upper surface of the body so that a concentration of alkali distributed on the surface of the strip to be washed is selectively detected at an arbitrary position; and an edge sensing part which is equipped with guiding stands(90a,90b,90c) that are adjacently installed in front of the degreasing detection part, transferable in a width direction of the strip by an electric motor(80) and have an edge sensor(88) sensing the edge of the strip, and contacts with the controller so that the degreasing detection part is exactly guided to a position detecting the degreasing defects by detecting the edge of the strip proceeded.
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