Improvements in or relating to valve operating mechanisms

摘要

973,176. Valves. COMMISSARIAT A L'ENERGIE ATOMIQUE. Aug. 8, 1962 [Aug. 18, 1961], No. 30380/62. Heading F2V. [Also in Division G6] A vessel has a plurality of inlet-outlet connections each controlled by a valve and a common selectively operable valve actuating mechanism is provided. A vessel 1, e.g. the chamber which collects the coolant in a nuclear reactor, has a plurality of inlet and/or outlet conduits 2 each containing a valve comprising a body 5 and a valve member 6. The valve member 6 is screw threaded at one end so as to be adjustable by rotation of a lug 9. A common actuator pin 10 is carried by a hollow shaft which is axially and rotationally adjustable for selection of the valve to be operated. The hollow shaft 11 extends through the wall of the chamber 1 and passes through a sealing structure 12 and through a biological protection shield 13 into a control chamber 14. For balancing purposes the other end of the shaft 11 projects out of the chamber 1 into a cylinder 23 which is maintained at atmospheric pressure. Within the tube 11 is a tube 25 containing an endoscope device 241 and an illuminating device 24 whereby the position of the actuating pin may be viewed through eye pieces 26 by the operation within the control chamber 14. A television camera may be used instead. The operating mechanism comprises a cage 30 rotatably connected to the shaft 11 and mounted on two stationary screwed rods supporting, within the cage 30, nuts 32 which are rotatable by a handle 34 to effect axial movement of the shaft 11. Rotation of a second handle 35 effects rotation of the shaft 11 through gearing. The positions of the valve members 6 may be directly indicated by synchronously driven screws outside the chamber 1. The pin 10 may actuate a switch in an electric warning circuit on excessive movement of the valve member.