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A coded adaptive stroke lightning protection valve positioner and its control method

A technology of valve positioner and coding control, which is applied in the direction of valve details, valve devices, valve operation/release devices, etc., to achieve accurate control and ensure the effect of sampling accuracy

Active Publication Date: 2022-04-01
SHENZHEN MAXONIC AUTOMATION CONTROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a coded adaptive stroke lightning protection valve positioner and control method, aiming to solve the technical problem of how to enable the valve positioner to accurately control valves with different stroke specifications

Method used

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  • A coded adaptive stroke lightning protection valve positioner and its control method
  • A coded adaptive stroke lightning protection valve positioner and its control method
  • A coded adaptive stroke lightning protection valve positioner and its control method

Examples

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Embodiment 1

[0058] In order to achieve the above purpose, the embodiment of the present invention provides a method for controlling a lightning protection valve positioner with an coded adaptive stroke, refer to figure 1 , figure 1 It is a schematic flowchart of the control method. The control method is suitable for the lightning protection valve positioner of the coding type adaptive stroke.

[0059] In this embodiment, refer to figure 2 and image 3 , figure 2 It is a schematic diagram of the internal circuit of the valve positioner; image 3 Diagram of the internal signal flow of the valve positioner.

[0060] The valve positioner is connected to the valve actuator 10, and the valve positioner includes a processor 1, a first A / D converter 2-1, a valve position feedback potentiometer 7, an encoding control circuit 11 and a surge protector 5 , the processor 1 is connected with the first end of the first A / D converter 2-1 and the first encoding pin of the encoding controller 11; t...

Embodiment 2

[0100] In order to achieve the above purpose, the embodiment of the present invention provides a lightning protection valve positioner with coded adaptive stroke. In this embodiment, refer to figure 2 and image 3 , figure 2 It is a schematic diagram of the internal circuit of the valve positioner; image 3 Diagram of the internal signal flow of the valve positioner.

[0101] The valve positioner is connected to the valve actuator 10, and the valve positioner includes a processor 1, a first A / D converter 2-1, a valve position feedback potentiometer 7, an encoding control circuit 11 and a surge protector 5 , the processor 1 is connected to the first end of the first A / D converter 2-1 and the first encoding pin of the encoding controller 11; the first A / D converter 2-1 The second end of 1 is connected to the first end of the valve position feedback potentiometer 7; the processor is also communicated with the input end of the valve actuator 10 and the surge protector; the pr...

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Abstract

The invention discloses a coded type self-adapting stroke lightning protection valve positioner and a control method thereof. The valve positioner includes a processor, a first A / D converter, a valve position feedback potentiometer, a coded control circuit and a surge The protector, the code control circuit generates the current reference opening of the preset valve based on the valve opening current signal transmitted by the processor, and generates the actual opening of the current valve based on the current analog resistance signal provided by the valve position feedback potentiometer. When the opening is smaller than the current reference opening, it is judged that the maximum stroke of the current valve is less than the maximum stroke of the preset valve, and the target constant current is generated according to the difference between the current reference opening and the actual opening, and the corresponding valve position feedback potentiometer is provided. The target constant current source signal; when the signal fed back by the valve position feedback potentiometer flows through the first A / D converter, the sampling accuracy of the first A / D converter is ensured, so that the valve positioner can control valves with different stroke specifications Accurate control.

Description

technical field [0001] The invention relates to the technical field of industrial automation, in particular to a lightning protection valve positioner and a control method with a coding type adaptive stroke. Background technique [0002] Valve positioners are widely used in the field of automatic control. In order to adapt to valve actuators with different strokes, existing valve positioners are generally realized by changing the mechanical transmission ratio of gears. Inside the valve positioner, there is a feedback gear for changing valve position. The mechanical transmission and ratio switch of the valve position detection gear can meet the different stroke requirements of the valve by switching the change of the transmission ratio of the gear. The way of this type of mechanical shifting is usually high and low two gears fixed transmission ratio (such as 1:3 or 1:5...) to adapt to different strokes. [0003] The conventional valve positioner in the prior art feeds back t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K37/00F16K31/02
CPCF16K37/0083F16K31/02
Inventor 邹靖贺婷袁菲陈士学
Owner SHENZHEN MAXONIC AUTOMATION CONTROL CO LTD