Online performance and fault detection analysis system for regulating valve

Abstract

The invention discloses an online performance and fault detection analysis system for a regulating valve. A displacement sensor is used for feeding back a displacement signal of the regulating valve;a membrane chamber pressure sensor is used for recording a pressure signal in a membrane chamber of an executive mechanism; an input signal collector is used for monitoring an input signal of a positioner; a time recorder is used for recording a time constant; a fault diagnosis device simply processes the input signal, membrane chamber pressure, displacement and time data, and compares the data with original data of the regulating valve to judge a running condition and a fault type of the regulating valve; and for the condition of exceeding a performance index original data limit value, the system transmits the operation data and the fault type to a detection data storage device, and sends the operation data and the fault type to a detection data receiving device in a manufactory control part through a detection data transmitter and a network cable. According to the system, online performance and fault detection analysis and diagnosis of the valve are realized.

Description

technical field [0001] The invention belongs to the field of instruments and meters, and in particular relates to an on-line performance and fault detection and analysis system for a regulating valve. Background technique [0002] At present, most of the fault diagnosis in the regulating valve industry is realized by shutting down for maintenance. The instrument department formulates the valve maintenance plan, and shuts down the regulating valves on the device for maintenance on a periodic basis. However, some regulating valves do not really need to be repaired, and the problem usually occurs in Regarding other issues, this shows that we only need to repair and adjust or replace a certain part or accessory in the valve for the failure of the regulating valve, and there is no need to disassemble and comprehensively repair the regulating valve. This periodic maintenance method often results in unnecessary overhaul or omission of control valves with potential failures. [000...

AI Technical Summary

Problems solved by technology

Replacing all intelligent valve positioners and fault diagnosis feedback systems will also result in a large investment cost

[0006] In addition, at present, the fault diagnosis data of

Images