| 摘要 |
PROBLEM TO BE SOLVED: To provide an anomaly detection system of a selector valve which can normally monitor an operation speed of the selector valve, and is provided with an alarming function of informing of a delay in the operation speed of the valve. SOLUTION: The anomaly detection system of a selector valve comprises a solenoid-controlled valve 2 for operating the selector valve 1, an opening-side limit switch 3 and closing-side limit switch 4 for detecting an operation position of the selector valve 1, a controller 6 for controlling opening/closing of the selector valve 1, and a timing means 9 which starts a timer under an actuation signal to a solenoid valve relay, and stops the timer under a position-detection signal from the limit switches 3, 4 to measure the operation time of the selector valve 1. On the basis of signals from the timing means 9, the controller 6 actuates an alarm means 8 in the case when the operation time of the selector valve 1 becomes shorter than a set value. COPYRIGHT: (C)2007,JPO&INPIT
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