Valve, abnormality diagnosis method of valve

Patent metadata

Field	Value
Publication number	US-12123517-B2
Application number	US-202318136844-A
Country	US
Kind code	B2
Filing date	Apr 19, 2023
Priority date	Nov 29, 2017
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

To enable accurate and simple diagnosis of an operation abnormality of a valve.
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

The invention claimed is:

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.

2. The valve according to claim 1 , wherein the rotation regulation mechanism comprises:
a groove formed in the axial direction of the diaphragm depressor, and
a shaft rod slidably fitted into the groove.

3. An abnormality diagnosis method of a valve,
wherein the valve includes
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 distance between a magnet placed on the diaphragm depressor and the magnetic sensor, and
a rotation regulation mechanism that is configured to regulate the diaphragm depressor to rotate in the circumferential direction,
the abnormality diagnosing 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

• F16K31/5286

  comprising a sliding valve · CPC title

• F16K31/046

  with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor (F16K31/041 takes precedence) · CPC title

• F16K31/508

  the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element · 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

• F16K37/0041 Primary

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