US 12,123,517 B2
Valve, abnormality diagnosis method of valve
Ryutaro Tanno, Osaka (JP); Kenji Aikawa, Osaka (JP); Akihiro Harada, Osaka (JP); Yuya Suzuki, Osaka (JP); Takahiro Matsuda, Osaka (JP); Katsunori Komehana, Osaka (JP); Masahiko Ochiishi, Osaka (JP); and Tsutomu Shinohara, Osaka (JP)
Assigned to FUJIKIN INCORPORATED, Osaka (JP)
Filed by Fujikin Incorporated, Osaka (JP)
Filed on Apr. 19, 2023, as Appl. No. 18/136,844.
Application 18/136,844 is a continuation of application No. 16/765,863, abandoned, previously published as PCT/JP2018/037417, filed on Oct. 5, 2018.
Claims priority of application No. 2017-229482 (JP), filed on Nov. 29, 2017.
Prior Publication US 2023/0258281 A1, Aug. 17, 2023
Int. Cl. F16K 37/00 (2006.01); F16K 7/16 (2006.01); F16K 31/04 (2006.01); F16K 31/50 (2006.01); F16K 31/528 (2006.01); G01M 13/003 (2019.01)
CPC F16K 37/0033 (2013.01) [F16K 7/16 (2013.01); F16K 31/046 (2013.01); F16K 31/047 (2013.01); F16K 31/508 (2013.01); F16K 31/5286 (2013.01); F16K 37/0041 (2013.01); G01M 13/003 (2019.01)] 3 Claims
OG exemplary drawing
 
1. A valve configured for detecting an operation abnormality, comprising:
a diaphragm depressor configured to press a center portion of a diaphragm in conjunction with an operation of an actuator;
a pressing adapter configured to press a peripheral edge of the diaphragm;
a magnetic sensor attached to the pressing adapter and configured to detect a change in a distance between a magnet placed on the diaphragm depressor and the magnetic sensor;
an abnormality determination mechanism configured to compare a change in the distance between the magnet and the magnetic sensor at the time of abnormality diagnosis detected by the magnetic sensor and a previously measured change in the distance between the magnet and the magnetic sensor at the time of normality, and to determine, based on a result of the compare of the change to the previously determined change, whether or not there is an abnormality; and
a rotation regulation mechanism that is configured to regulate the diaphragm depressor to rotate in the circumferential direction.