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Automatic speed searching device and method for partial stroke test of control valve

A technology for controlling valves and speeds, applied in the direction of valve operation/release devices, valve devices, fluid pressure actuating devices, etc., which can solve the problems of no control valves, etc.

Active Publication Date: 2012-12-26
GENERAL EQUIP & MFG COMPANY INC D B A TOPWORX
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no simple, economical device that can monitor the performance of a control valve without a positioner

Method used

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  • Automatic speed searching device and method for partial stroke test of control valve
  • Automatic speed searching device and method for partial stroke test of control valve
  • Automatic speed searching device and method for partial stroke test of control valve

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Embodiment Construction

[0019] While the following text sets forth a detailed description of exemplary embodiments of the invention, it should be understood that the legal scope of the invention is defined by the words of the claims at the end of this patent. The detailed description is exemplary only and does not describe every possible embodiment, since describing every possible embodiment would be impractical, if not impossible. Based on reading this disclosure, one of ordinary skill in the art will be able to implement one or more alternative embodiments, using either current technology or technology developed after the filing date of this patent. Such additional modifications still fall within the scope of the claims defining the invention.

[0020] Control devices for a process control system may include process control devices, such as control valves, dampers, or other variable opening devices, for modulating or controlling fluid flow within the process control system. While the exemplary emb...

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Abstract

An automatic speed searching device for a partial stroke test of a control valve includes a spool valve operatively connected to a pilot valve and a blocker valve. An electrical module is operatively connected to the pilot valve, a supply of control fluid, and the blocker valve. In an open position of the spool valve, a first control fluid inlet is fluidly connected to a first control fluid outlet, and in a closed position of the spool valve the first control fluid outlet is fluidly connected to a second control fluid outlet. A method of determining an optimum stroke speed includes iteratively powering a main and secondary solenoid in the electrical module and updating parameters to move a control element of the control valve until movement of the control element is within a desired range.

Description

technical field [0001] The present invention relates generally to control valve or actuator rod speed search devices, and more particularly to automatic control valve or actuator rod speed search devices for partial stroke testing of control valves. Background technique [0002] Existing process control systems often employ control valves to control fluid flow through the process control system. Because control valves occasionally fail, periodic diagnostics of process control devices or process control components, such as control valves, are required in order to determine the availability and performance of these devices. Determining the availability of a process control device may allow for better scheduling of maintenance of the process control device, thus reducing the occurrence of failures and downtime. This can increase efficiency, safety and revenue. Process control systems can use a variety of sensors and other measurement devices to observe the characteristics of ...

Claims

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Application Information

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IPC IPC(8): F16K37/00F16K31/02F16K31/12
CPCF15B19/002Y10T137/0318Y10T137/7761F15B19/00F16K11/07F16K31/34
Inventor 李京丽B·里格斯比R·L·拉方泰恩B·R·彭宁
Owner GENERAL EQUIP & MFG COMPANY INC D B A TOPWORX
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