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Method and apparatus to monitor diaphragm condition

A diaphragm, condition technology, used in the field of diaphragms for process control

Active Publication Date: 2012-06-27
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, many diaphragms used in the process industry do not need to be replaced on a regular schedule as breakdown degradation is dependent on diaphragm usage and exposure to the process

Method used

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  • Method and apparatus to monitor diaphragm condition
  • Method and apparatus to monitor diaphragm condition
  • Method and apparatus to monitor diaphragm condition

Examples

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Embodiment Construction

[0017] An example diaphragm assembly uses a sensor to provide a signal indicative of the condition of a pressure-responsive component, or diaphragm, of the diaphragm assembly. The example diaphragm assembly described herein enables determination of the degree of degradation of an in-service diaphragm to significantly reduce maintenance costs associated with manual inspection of the diaphragm. Although the example diaphragm assemblies described herein are discussed with reference to diaphragm valves or Weil valves, and the diaphragm sensor is described as a conductivity sensor or strain gauge for sensing the condition of a pressure-responsive diaphragm, those of ordinary skill in the art will understand that, such as in Spring diaphragm actuators or any other type of diaphragm used in regulators may be used in conjunction with other types of electrical, optical, acoustic and / or physical sensing devices to monitor physical or material characteristics (condition) of the diaphragm....

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Abstract

Methods and apparatus are disclosed that monitor a diaphragm condition. In one example, a fluid control device includes a body (105) and a fluid passage through the body, the fluid passage including an inlet (110) and an outlet (115). The example fluid control device also includes a diaphragm (135) within the fluid control device to control the flow of fluid through the passage, and a sensor (150) coupled to the diaphragm to monitor a condition associated with wear of the diaphragm.

Description

technical field [0001] The present invention relates generally to diaphragms for process control, and more particularly to methods and apparatus for monitoring the condition of the diaphragms. Background technique [0002] It is known in the process industry to use diaphragms in various applications to control fluid flow through process control equipment, such as control valves or regulators. In the process industry, diaphragms are often flexible pressure-responsive elements used to transmit force to a control element or to create a variable restriction in a flow path to control fluid flow. A typical diaphragm application uses the diaphragm as the load element in a spring-diaphragm actuator to provide actuator propulsion in response to control pressure applied to the actuator structure to position the control element in a control valve. Other typical diaphragm applications use diaphragms as fluid flow control elements such as in diaphragm valves or Weir valves or pressure r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K7/12F16K37/00
CPCF16K37/0025F16K7/12F16K37/0041F16K7/123F16K37/0083Y10T137/8158
Inventor D·E·奥哈拉J·M·布尔克
Owner FISHER CONTROLS INT LLC