Vorrichtung zum selbsttätigen Umschalten der Einspeisung in zwei parallele Stränge einer Einspeiseleitung bei Bruch eines der Stränge, insbesondere eines Notkühlsystems in Kernreaktoren

摘要

Device for automatically switching a feed flow from one to the other of two parallel lines branching from a feed line when a break occurs in one of the branch lines, includes a piston-controlled three-way valve situated at a location of the feed line at which the branch lines branch off, the three-way valve having an inlet connected to the feed line and a respective outlet connected to each of the branch lines, the three-way valve having a valve member normally closing one of the outlets and being operatively connected to a displaceable piston and actuable thereby for opening the normally closed outlet and closing the other of the outlets, a fixed throttle disposed in each of the outlets, a first pressure line connected between one side of the piston and the branch line connected to the normally closed outlet at a location thereof downstream of the fixed throttle in the normally closed outlet, and a second pressure line connected between the other side of the piston and the branch line connected to the other outlet at a location thereof downstream of the fixed throttle in the other outlet.