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Shut-off fitting

A blockage and signal technology, applied in the direction of engine components, valve details, valve devices, etc., to achieve a safe and reliable cut-off effect

Inactive Publication Date: 2012-07-04
ABB TECH AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] A disadvantage of the prior art is that the known technical solutions relate to the software function of the digital position regulator, in which the closure moves uncontrollably in the event of a problem with the regulating signal and thus the energy supply, so that there is still water hammer danger of phenomenon

Method used

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Examples

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Embodiment Construction

[0020] exist figure 1 In this case, a process valve 2 is installed as an adjustment mechanism in a not completely shown line 1 of a process technology plant not shown in further detail. The process valve 2 internally has a closing body cooperating with the valve seat (Ventilsitz) 3 4. Used to control the amount of process medium (Prozessmedium) 5 flowing through. The closing body 4 is linearly actuated by a pneumatic actuating drive 6 via vertical rods 7 . The actuating drive 6 is connected to the process valve 2 via a bracket (Joch) 8 . The control device 9 is arranged on the bracket 8 . The travel distance (Hub) of the vertical link 7 is communicated to the control device 9 via the position sensor 10 . The detected travel path is compared with a target value in the position controller 18 and the actuating drive 6 is controlled according to the determined control deviation. The position regulator 18 of the control electronics 9 actuates the I / P converter in order to con...

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Abstract

The present invention relates to a shut-off fitting in pipeline which is provided with technical equipment of a servo driving device. The servo driving device is connected with a control device (9) which is composed of a position adjustor (18) and a signal forming device (11). The position adjustor (18) is provided with an analog control input end (181) which is connected with a process control signal, and a binary control input end (182) which can control the servo driving device (6) according to a preset speed characteristic curve. The signal forming device (11) is provided with the following components: a feed voltage input end (114), an analog control output end (115) which is connected with feed voltage input end (114) through a first signal forming device (111), and a binary control output end (116) which is connected with the feed voltage input end (114) through a second signal forming device (112), and an energy accumulator (113). The analog control output end (115) of the signal forming device (11) is connected with an analog control input end (181) of the position adjustor (18). The binary control output end (116) of the signal forming device (11) is connected with a binary control input end (182) of the position adjustor (18).

Description

technical field [0001] The invention relates to a stopper in a pipe of a technical installation. Background technique [0002] Obturators are regulators for flowing substances The regulator completely interrupts or completely releases the mass flow without hitting (anfahren) an intermediate position (Zwischenstellung). Such closures are usually designed as valve plates, ball valves, globe valves or plug valves, since they cause only a very small pressure loss in the fully open state and are therefore only result in minimal energy loss. [0003] Closures of this type generally have a flow characteristic curve in which the flow in the region of the small opening cross-section responds to a small adjustment pitch with a disproportionately large flow change . This behavior is reversed over a large range of opening cross-sections, ie even large adjustment pitches (and thus also large changes in the hollow cross-section) lead to relatively marginal flow changes. A typical ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/02F16K47/02
CPCF16K37/0041F16K37/0025
Inventor T·克里格列维W·舒尔茨
Owner ABB TECH AG
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