Intelligent valve locator

A technology of intelligent valves and positioners, applied in valve details, valve devices, valve operation/release devices, etc., can solve problems such as wear, oxidation, mechanical hysteresis, etc., and achieve the effect of high control accuracy

Inactive Publication Date: 2017-06-09
CHENGDU 90 DEGREE IND PROD DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In some harsh on-site working conditions, such as too high or too low ambient temperature, strong vibration of valves or pipelines, and strong radiation and strong electromagnetic interference in the on-site environment, the intelligent valve positioner installed on the valve is not very good. wo

Method used

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  • Intelligent valve locator

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Embodiment Construction

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0032] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features that are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0033] Such as figure 1 , the intelligent valve positioner of the present invention includes

[0034] Valve position collection unit : The position sensor detects the displacement of the spool and converts the displacement into a voltage signal. The position detection amplifier circuit amplifies the voltage signal and transmits it to the A / D acquisition board. The A / D acquisition board converts the voltage signal into a digital signal 001 and uploads it to con...

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Abstract

The invention discloses an intelligent valve locator which is characterized by comprising a control unit, a valve location acquisition unit, an actuating unit, a controlled system, and a front-end input unit; to be specific, the control unit receives a deviation value between a set signal and a feedback signal to realize high-precision conversion, calculation and PWM output; the valve location acquisition unit monitors location of a valve spool of a controlled valve in real time; the actuating unit is composed of two piezoelectric valve type I/P electric appliance conversion units, the piezoelectric valves realize air feeding and discharging of an air chamber of the actuating unit as an ARM controller outputs PWM control signals to control switching; the controlled system is composed of a pneumatic diaphragm actuator and a linear-motion plunger valve, and the air chamber of the pneumatic diaphragm actuator is connected with two piezoelectric valves; the front-end input unit provides power supply and the set signal. According to the intelligent valve locator, the locator and the valve can be installed separately, non-contact field detection is achieved, and high-load problem of an input circuit is solved.

Description

technical field [0001] The invention relates to a valve positioner, in particular to an intelligently controlled valve positioner. Background technique [0002] The valve positioner is divided into pneumatic valve positioner, electric valve positioner and intelligent valve positioner according to the structure. It is the main accessory of the control valve and is usually used in conjunction with the pneumatic control valve. The signal is used to control the pneumatic control valve. When the control valve operates, the displacement of the valve stem is fed back to the valve positioner through the mechanical device, and the valve position status is transmitted to the upper system through the electrical signal. [0003] In some harsh on-site working conditions, such as too high or too low ambient temperature, strong vibration of valves or pipelines, and strong radiation and strong electromagnetic interference in the on-site environment, the intelligent valve positioner installe...

Claims

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Application Information

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IPC IPC(8): F16K37/00F16K31/126
CPCF16K37/0083F16K31/126F16K37/0041
Inventor 卢晔
Owner CHENGDU 90 DEGREE IND PROD DESIGN CO LTD
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