Drainage device

Abstract

The drainage device (1) begins to drain water by rotating the drain handle (3), and simultaneously returns the drain handle (3) to the stop position to stop the water flow. The drainage device (1) has a diaphragm valve body (13) that controls the opening and closing of the waterway W. The pressure chamber (C3) formed on the back side of the diaphragm valve body (13) is opened and closed by a pilot valve body (14). The pilot valve body (14) is opened and closed by a switching mechanism (15) as the drain handle (3) is rotated. The deceleration mechanism (16) rotates by the water flow generated by opening the diaphragm valve body (13), and the deceleration mechanism (16) returns the drain handle (3) to its original position.

Images