| 摘要 |
FIELD: machine building.SUBSTANCE: invention refers to automatic control devices and is meant to be used in hydraulic and pneumatic systems. Distributing mechanism consists of housing, inlet flange and outlet flange provided with a seat. Shutoff valve with a rubber ring of circular section is pressed with a spring to the seat. Ring is fixed in end face groove of shutoff valve by means of a pressure washer. Shutoff valve moves in the housing bore on the side of outlet hole and forms together with the housing a cavity into which pressure of the working medium, which is connected through inlet flange, is supplied through the control system. Outlet of distributing mechanism from outlet flange is connected to drain valve through a hollow stock. The latter is rigidly attached with a nut to shutoff valve and tightly connected to the housing and piston. Piston has an end rubber ring, moved in the housing bore on the side of inlet hole, pressed with spring and pressure of working medium supplied through inlet flange. Tightness of cavity formed with shutoff valve and bore in the housing on the side of outlet hole in open position is provided due to sealing along the bottom of bore in the housing.EFFECT: increasing operating safety owing to providing the release of residual pressure and rests of working medium from shutoff line, and improving the device reliability.4 dwg |
