Valve sheet turning device for fire control valve, has valve blade provided with transmission arm that is attached with valve sheet, where another transmission arm of valve blade is connected to driving pressure axis

摘要

The device (3) has a valve blade provided with a transmission arm that is attached with a valve sheet (2). Another transmission arm of the valve blade is connected to a driving pressure axis. Ends of the transmission arms are hinged with each other by utilizing a coupling element, where the coupling element is fixed on the former transmission arm. A guiding unit includes a groove, and the coupling element is inserted into the groove, where the guiding unit guides movement of the coupling element.