Method and electronic device for finding the opening point for a regulated electropneumatic valve of a pneumatic actuating drive

A pneumatic adjustment and opening point technology, which is applied in the direction of valve operation/release device, valve device, fluid pressure actuation device, etc., can solve the problems of equipment damage, failure to consider the characteristics of the adjustment circuit, end termination, etc., and achieve the realization of adjustment Accuracy, exclusion of risk of damage, avoidance of calibration effects

Inactive Publication Date: 2010-07-21
ABB TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem here is that it doesn't take into account the characteristics of the regulation loop
Especially in the case of small-volume pneumatically adjustable drives, there is a risk of end terminations on the reciprocating path, which could cause damage to the equipment

Method used

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  • Method and electronic device for finding the opening point for a regulated electropneumatic valve of a pneumatic actuating drive
  • Method and electronic device for finding the opening point for a regulated electropneumatic valve of a pneumatic actuating drive
  • Method and electronic device for finding the opening point for a regulated electropneumatic valve of a pneumatic actuating drive

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Embodiment Construction

[0020] according to figure 1 , a device 2 in the form of a process valve is basically inserted in the line 1 of a process-technical device not explicitly shown here. The device 2 has in its interior a closing body interacting with a valve seat 3 for controlling the quantity of process medium 5 flowing through. The closing body 4 is driven linearly by a pneumatic actuating drive 6 via a switching unit 7 as a reciprocating pull rod. The pneumatic adjustment drive 6 is fixedly connected to the device 2 via a yoke 8 . Also arranged on the yoke 8 is a position controller 9 in the form of an electronic module.

[0021] The reciprocating movement of the switching unit 7 is reported to the position regulator 9 via the position sensor 10 . For proper functioning, the detected reciprocating movement is compared by the regulating unit 12 with externally imported setpoint values ​​stored in a memory unit, and the regulating drive 6 is actuated in accordance with the determined regulati...

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Abstract

A method and an electronic device are disclosed, for finding an opening point for an electropneumatic valve (13), which method or electronic device can be used in a closed control loop for position regulation of a switching element of a pneumatic actuating drive (6) for a fitting (2) which can be operated thereby. An exemplary method can include: a) energizing the electropneumatic valve (13) by a drive signal which corresponds to an estimated opening point; b) measuring control-loop characteristics for this drive signal by using sensors to detect movement of the switching element (7); c) if determined control-loop characteristics for a present opening point do not correspond to nominal presets, then varying the drive signal based on an evaluation result to produce a better-matched opening point, and the finding process then starts again with step a).

Description

technical field [0001] The invention relates to a method for finding an opening point in an electro-pneumatic valve which is arranged in a closed control loop for position adjustment of a switching unit of a pneumatic adjustment drive, thereby operating a device . Furthermore, the invention also relates to an electronic device for implementing the method, as well as a computer program product and a data carrier associated therewith. Background technique [0002] The invention is mainly applied in the field of pneumatic adjustment drives comprising a position regulator which adjusts a device connected to the pneumatic adjustment drive to a desired degree of opening according to a predetermined nominal value. The device can be, for example, a process valve located in the piping system of a process technology plant. Apart from this, pneumatically adjustable drives of the type of interest here are also suitable for actuating other industrial and similar devices. [0003] Prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/08
CPCG05B2219/41143F16K31/1262F16K37/0025G05B2219/45006F16K37/0041F15B19/002G05B19/404G05B2219/41186
Inventor H·克雷瑟
Owner ABB TECH AG
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