Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-05-29
1989-07-11
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
73290V, G08B 2100
Patent
active
048476005
ABSTRACT:
In fossil boilers and steam generator of fossil boilers and nuclear power plants, a son-air detector using ultrasonic transducers is employed with a glandless motor pump which may have a vertical top vent pipe to ascertain with fast response if the vent pipe has liquid or not. In the glandless motor pump, the pumped primary liquid per se is used for lubricating the bearings of the motor, whereby, if the lubricating liquid is absent, the motor operation should not be continued. For redundancy, a second transducer may be used, whereby when both the transducers are connected to simultaneously indicate absence of liquid in the vent pipe, suitable corrective action is initiated. A vent pipe filled with liquid will transmit ultrasonic bursts (provided by the transducer) through the liquid, so that the ultrasonic waves are reflected back. An empty vent pipe will not reflect the ultrasonic waves which would simply be dissipated. The motor pump also uses a wrap around type heat exchanger cooler which takes in plain cool water from the outside to cool the outside of the stator. The motor pump optionally is provided with a bearing water thermometer and a purge line.
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Westinghouse Corp. Product Update 84-3, "Detectaire Protection for Boiler Circulating Pump".
Westinghouse Corp. Product Update 83-1, "Boiler Circulating Pump Venting".
Westinghouse Corp., "Mark IV Detectaire", Jul. 1960.
Hofsass Jeffery A.
Nath B. R.
Orsino Joseph A.
Westinghouse Electric Corp.
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