| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve opening cock having opening display function enabling an opening or closing state of a stop valve to be visually acknowledged from the ground, thereby enabling the valve body that should be opened or closed to be prevented from being damaged or capable of preventing an incomplete closed state of the valve body in advance.SOLUTION: An opening meter 63 constitutes a planetary gear mechanism in which an external gear 632 is applied as an input unit, the external gear 632 is engaged with the first internal gear 630d (a fixed internal gear) having different tooth number and the second internal gear (a movable internal gear) having different tooth number coaxially arranged to each other so as to reduce a rotation of the second internal gear. Since the second internal gear is assembled into an opening display plate 634, the opening display plate 634 is rotated as the second internal gear is rotated. Since the opening display plate 634 is provided with an arrow 634b acting as an index indicating an opening of stop valve and an opening scale display part 630e is installed at an opening meter main body 630, these members may coact to perform a function for displaying a valve opening of the valve body of the stop valve. |
