Title:
METHODS AND APPARATUS FOR AUTOMATICALLY DETECTING THE FAILURE CONFIGURATION OF A PNEUMATIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2017/147846
Kind Code:
A1
Abstract:
Methods and apparatus are disclosed for automatically detecting the failure configuration of a pneumatic actuator (102). A control module (108) is operatively coupled to the actuator (102), and the actuator (102) is operatively coupled to a valve (104) having a flow control member (110). When a number of pilot valves included in the control module (108) is indicative of a double-acting actuator (102), the failure configuration of the actuator (102) is determined based on the number of pilot valves. When the number of pilot valves included in the control module (108) is indicative of a single-acting actuator (102), the failure configuration of the actuator (102) is determined by comparing a first measurement value obtained in response to moving the flow control member (110) in a first direction to a first position and a second measurement value obtained in response to moving the flow control member (110) in a second direction opposite the first direction to a second position.
Inventors:
ZHANG TIEFENG (CN)
SCHREUDER EDWIN (NL)
HOBERT HARRY (NL)
YUAN YONG (CN)
SCHREUDER EDWIN (NL)
HOBERT HARRY (NL)
YUAN YONG (CN)
Application Number:
PCT/CN2016/075482
Publication Date:
September 08, 2017
Filing Date:
March 03, 2016
Export Citation:
Assignee:
EMERSON PROCESS MANAGEMENT VALVE AUTOMATION INC (US)
ZHANG TIEFENG (CN)
ZHANG TIEFENG (CN)
International Classes:
F16K31/122; F16K37/00
Foreign References:
| CN105135041A | 2015-12-09 | |||
| CN101763121A | 2010-06-30 | |||
| CN101649848A | 2010-02-17 | |||
| CN103899830A | 2014-07-02 | |||
| CN101858457A | 2010-10-13 | |||
| US20150107675A1 | 2015-04-23 |
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
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