Valve, Abnormality Diagnosis Method of Valve

Patent metadata

Field	Value
Publication number	US-2023258281-A1
Application number	US-202318136844-A
Country	US
Kind code	A1
Filing date	Apr 19, 2023
Priority date	Nov 29, 2017
Publication date	Aug 17, 2023
Grant date	—

Abstract

A valve V 1 capable of detecting an operation abnormality has a magnet M 1 that is attached in the vicinity of a pressing adapter 52 of a stem 53 that slides according to an opening/closing operation of the valve V 1 , and a magnetic sensor M 2 that is attached to a surface acing the stem 53 , inside the pressing adapter 52 that presses a peripheral edge of a diaphragm 51 , and detects a change in a distance between the magnet M 1 and the magnetic sensor M 2 . Further, an abnormality determination mechanism compares the change in the distance between the magnet M 1 and the magnetic sensor M 2 at the time of abnormality diagnosis detected by the magnetic sensor M 2 and a previously measured change in the distance between the magnet M and the magnetic sensor M 2 at the time of normality, and determines whether or not there is an abnormality.

First claim

1 . A valve capable of detecting an operation abnormality, comprising:
a diaphragm depressor pressing the center portion of the diaphragm in conjunction with the actuator operation; a pressing adapter pressing a peripheral edge of the diaphragm; a magnetic sensor attached to the pressing adapter and detecting a change in distance between a magnet placed on the diaphragm depressor and the magnetic sensor; and an abnormality determination mechanism comparing 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 determining whether or not there is an abnormality.

2 . The valve according to claim 1 ,
wherein the diaphragm depressor is regulated to rotate in the circumferential direction by a rotation regulation mechanism.

3 . The valve according to claim 2 ,
the rotation regulation mechanism comprising: a groove formed in the axial direction of the diaphragm depressor, and a shaft rod slidably fitted into the groove.

4 . An abnormality diagnosis method of a valve,
wherein the valve includes a diaphragm depressor pressing the center portion of the diaphragm in conjunction with the actuator operation, a pressing adapter pressing a peripheral edge of the diaphragm, and a magnetic sensor attached to the pressing adapter and detecting a change in distance between a magnet placed on the diaphragm depressor and the magnetic sensor, the abnormality diagnosis method comprising: a step comparing 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 determining whether or not there is an abnormality.

Assignees

• Fujikin Kk

Inventors

• TANNO Ryutaro
• Aikawa Kenji
• Harada Akihiro
• Suzuki Yuya
• Matsuda Takahiro
• Komehana Katsunori
• Ochiishi Masahiko
• Shinohara Tsutomu

Classifications

• F16K37/0033 Primary

  using a permanent magnet, e.g. in combination with a reed relays · CPC title

• G01M13/003 Primary

  Machine valves (testing valves for fluid tightness G01M3/00) · CPC title

• F16K7/16

  the diaphragm being mechanically actuated, e.g. by screw-spindle or cam · CPC title

• F16K37/0041 Primary

  for measuring valve parameters (F16K37/0033 takes precedence) · CPC title

• F16K31/047

  characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means (F16K31/043 takes precedence) · CPC title