JPS62867U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a half-sectional front view of a diaphragm valve according to an embodiment of the present invention. FIG. 2 is a front view corresponding to FIG. 1 in which the piston is installed in the opposite direction and the pressurized air inlet is changed. FIG. 3 is a sectional view taken along line AA in FIG. 1. 10: valve body, 10a: opening, 11: diaphragm, 14: spindle, 15a, 15b: return spring, 18: cylinder, 20: piston, 21:
First chamber, 22: Second chamber, 23: First port, 24
: Second port, 26: Diaphragm drive unit.

Claims (1)

[Claims for Utility Model Registration] Comprising a diaphragm provided at the opening of the valve body, and a drive unit that drives the diaphragm to open and close the flow path of the valve body, the drive unit includes a cylinder and a flow path that flows into the cylinder. A diaphragm valve consists of a piston that moves inside the cylinder to drive a diaphragm using pressurized air, and a return spring that returns the piston when pressurized air does not flow in. , one end of this spindle is connected to the diaphragm, the other end is provided through the bottom of the cylinder, and pressurized air is supplied to a first chamber on the diaphragm side of the cylinder and a second chamber on the opposite side to the diaphragm, which are partitioned by a piston. A first port and a second port are provided as selective inflow ports, and when the first port is used as an inflow port for pressurized air, a return spring is arranged so that the diaphragm closes the flow path, and the second port is used as an inflow port for pressurized air. A diaphragm valve characterized in that a return spring is arranged so that the diaphragm opens a flow path when used as an inlet for pressurized air.