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Method and air-operated valve for determining wear condition of valve through pressure sensing

A pressure and valve technology, applied in the field of moving and/or stopping, which can solve problems such as equipment or vehicle failure, reduce measurement errors and eliminate adverse effects

Inactive Publication Date: 2010-06-23
ABB TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem when adopting the valve device of interest here is that in the event of a previously unforeseen failure of the pneumatically regulated drive, the entire device or vehicle may fail
But this can only be done outside of the pneumatic valve working properly

Method used

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  • Method and air-operated valve for determining wear condition of valve through pressure sensing
  • Method and air-operated valve for determining wear condition of valve through pressure sensing
  • Method and air-operated valve for determining wear condition of valve through pressure sensing

Examples

Experimental program
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Embodiment Construction

[0025] according to figure 1 , a process valve is arranged in the fragmented line 1 of a process technology device not shown further. The treatment valve has in its interior a closing body 4 which cooperates with the valve seat 3 for controlling the amount of treatment medium 5 flowing through. The closing body 4 is driven linearly by the pneumatic adjustment drive 10 via the lifting rod 7 . The pneumatic adjustment drive 10 is connected to the valve housing 2 of the treatment valve via the yoke 6 . A digital positioner with a positioner 13 is arranged on the yoke 6 . The lift of the lift rod 7 is reported to the position controller area via the position recorder 12 . The detected lift is compared in the positioning controller 13 with a predetermined setpoint value, and the pneumatic actuating drive 10 is actuated as a function of the determined actuating deviation. The pneumatic actuating drive 10 includes a pilot valve arrangement in the area of ​​the positioning control...

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Abstract

The present invention provides a method for determining, through pressure sensing, the working condition of a valve device for controlling and treating a medium flow and a valve device, wherein a control pressure is applied to moving a valve unit (4) which is movably arranged in a valve shell (2) in axial direction, the control pressure applied in the activated and / or inactivated state of the valve unit (4) is measured to determine a static friction; after the valve unit (4) is stopped, a plurality of measurements are performed to determine a pressure increment (delta p) of the control pressure needed by the movement of the valve unit (4); then, the measured pressure increment (delta p)n is temporarily stored in a storage unit (18) and accessed by a diagnosis unit (17) so as to determine, through a statistic analysis, the possible influence on the movement of the valve unit (4) caused by a static friction.

Description

technical field [0001] The invention relates to a method for diagnosing the operating state of a valve device, in particular a pneumatic adjustment drive, for controlling a process medium flow by means of pressure sensing, in which method a valve which is arranged axially displaceable in a valve housing The unit is moved by applying a control pressure, wherein in order to determine the static friction force, the control pressure of the start and / or stop phases of the valve unit is measured. In addition, the invention also relates to a valve device having electronic means for implementing the above-described method. Background technique [0002] The concept "position adjuster" as used in this disclosure supports an electromechanical system that controls an auxiliary energy source of a pneumatic adjustment drive in accordance with one or more input signals in order to bring the valve unit into a specific position. To function, positioning regulation requires gas under pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B19/00F16K37/00
CPCF15B19/005F16K37/0075F16K37/0091
Inventor U·E·迈尔D·帕佩
Owner ABB TECH AG
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