| 摘要 |
<p>A safety control valve for a domestic water supply system is described. It includes a valve body having a flow passage therethrough comprising a pair of laterally spaced vertical flow channels and a top flow cavity connecting these vertical flow channels. The top ends of the spaced flow channels open into a flat bottom face of the top flow cavity, which flat face forms a valve seat. A closure flap is mounted in the top cavity and is spring biased downwardly against the flat bottom face to close the valve. A central cylindrical cavity extends vertically between the bottom of the top flow cavity and the bottom of the valve body with a thin elastic diaphragm closing the top end of the cylindrical cavity. A solenoid is mounted on the bottom of the valve body concentric with the central cylindrical cavity. An actuating pin is mounted within the cylindrical cavity and solenoid, this actuating pin being spring biased upwardly such that when the solenoid is not activated the pin moves upwardly extending the diaphragm and pushing the closure flap upwardly to open the valve and when the solenoid is activated the pin is pulled downwardly thereby allowing the closure flap to move downwardly and close the valve. Connector means are provided for connecting the vertical flow channels to a water pipe and locking means are provided for locking the actuating pin in closed position. Finally, there is included a probe means for detecting a water leak and thereby activating the solenoid.</p> |
