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Adjustment device for an open-close valve

A technology of regulating devices and valves, used in control/regulation systems, general control systems, instruments, etc.

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

AI Technical Summary

Problems solved by technology

This is a big additional cost both in terms of materials and money
Also, while equipment can run tests with the help of position controllers and the partial stroke tests implemented by them, solenoid valves require another testing method

Method used

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  • Adjustment device for an open-close valve
  • Adjustment device for an open-close valve
  • Adjustment device for an open-close valve

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] The adjusting device according to the prior art shown in FIG. 1 has an on / off valve 1 which can be moved by means of a pneumatic drive 2 via an adjusting element 3 (here in the form of a lifting lever) into an operating position, e.g. ” or can be moved to a safe position, eg “OFF”. The solenoid valve 4 utilizes the control voltage V provided by the control system 5 s To control, the solenoid valve connects the pneumatic drive 2 with the compressed air supply 6 . In an emergency, the control voltage Vs is switched off in order to vent the pneumatic drive 2 via the solenoid valve 4 . The pneumatic drive 2 is then depressurized and moves the adjusting element 3 together with the valve 1 from the operating position into the safety position, for example under the action of the spring 7 .

[0018] In order to be able to check the function of the adjusting device during a partial stroke test, an additional position controller 8 is connected pneumatically between the solenoid...

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PUM

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Abstract

An adjustment device for an open-close valve (1) has a pneumatic drive (2) which is aerated or de-aerated according to the presence or absence of a control voltage (Vs) which can be supplied by a control system (5). The valve (1) moves into an operating position when the drive is aerated, and into a safety position when the drive is de-aerated. The valve (1) is provided with an electro-pneumatic position regulator (8) for carrying out a partial stroke test. In order to reduce the technical demands of the invention, the electro-pneumatic position regulator (8) is directly connected to the pneumatic drive (2) with no interconnection of a magnetic valve controlled by the control voltage (Vs); the position regulator (8) is connected on the voltage supply side to the control voltage (Vs) which can be supplied by the control system (5), and is designed to de-aerate the pneumatic drive (2) if the power supply is interrupted; a routine for carrying out the partial stroke test, and a value for the set position of the valve (1) in the operating position are stored in the position regulator (8).

Description

technical field [0001] The invention relates to a regulating device for opening / closing a valve, with a pneumatic drive, which takes in or out air depending on the presence or absence of a control voltage which can be supplied by the control system, and the valve moves to In the operating position and when venting into the safety position, the actuating device has an electro-pneumatic position controller, which briefly moves the valve over its partial actuating stroke to a defined position in order to carry out a partial stroke test At the same time, the actual position of the valve is detected and a pneumatic control variable for the pneumatic drive is generated as a function of the actual position and the specified position. Background technique [0002] In the regulating device known from DE 10 2006 003 750 A1 or DE 10 2005 004 477 A1, a pneumatically opened / closed valve, in particular an emergency disconnection (ESD=emergency stop) valve, is brought into operation by mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/02
CPCG05B9/02
Inventor 克劳斯-彼得·黑尔福尔克尔·希尔施
Owner SIEMENS AG
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