Anti-blocking method and device of intelligent valve positioner I/P unit, storage medium and electronic terminal

A technology of intelligent valve and positioner, which is applied in the direction of valve operation/release devices, valve devices, chemical instruments and methods, etc., can solve the problems of I/P unit blockage, inability to control cylinder intake or exhaust, etc. The effect of unobstructed air and exhaust air passage

Inactive Publication Date: 2020-02-18
CHONGQING CHUANYI AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A very important problem in the actual use of the intelligent valve positioner is to ensure that the I / P unit cannot be blocked. If there is a blockage, the I / P unit will not be able to control the intake or exhaust of the cylinder, and the valve will not be able to move, but In practice, the compressed air supplied to the smart valve positioner contains more or less impurities, such as moisture, oil, small solid impurities, etc. If the valve is in a static state for a long time, these impurities are easy to accumulate Inside the I / P unit, causing the I / P unit to be blocked

Method used

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  • Anti-blocking method and device of intelligent valve positioner I/P unit, storage medium and electronic terminal
  • Anti-blocking method and device of intelligent valve positioner I/P unit, storage medium and electronic terminal
  • Anti-blocking method and device of intelligent valve positioner I/P unit, storage medium and electronic terminal

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Embodiment Construction

[0028] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in ...

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Abstract

The invention discloses an anti-blocking method of an intelligent valve positioner I / P unit. The method includes the steps that the state of a valve position is monitored, and whether the valve position is in a static state or not is judged; if the valve position is in the static state, the time when the valve position is in the static state is judged; and if the time when the valve position is inthe static state exceeds set time, the I / P unit is controlled to carry out anti-blocking treatment. When it is monitored that a valve is in the static position keeping state for a long time without air inflow or exhaust operation, PWM small pulses can be forced to be used for one-time or multi-time air inflow and exhaust operation, a small quantity of accumulated impurities are discharged out ofa positioner through air inflow and exhaust, the situation that more impurities are accumulated in the I / P unit is avoided, and it is guaranteed that air inflow and exhaust air ways of the I / P unit are smooth.

Description

technical field [0001] The invention relates to the field of valves, in particular to an anti-blocking method and device for an I / P unit of an intelligent valve positioner. Background technique [0002] Intelligent valve positioner is widely used in field control instruments in petrochemical and other fields. It is the main accessory of control valves. It is usually used in conjunction with pneumatic control valves. Its main function is to receive control commands from central control and precisely control the valve opening. [0003] The control of valve opening by intelligent valve positioner 1 is a closed-loop control, such as figure 1 As shown, it is mainly composed of several parts such as a sensor, a main board, and an I / P unit. The function of the sensor is to measure the position of the valve stem 3 in real time, and send the measured data to the main board for collection; the function of the main board is mainly to collect through the AD module. The data of the valv...

Claims

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Application Information

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IPC IPC(8): F16K31/126F16K37/00B08B5/02B08B13/00
CPCB08B5/02B08B13/00F16K31/1262F16K37/00
Inventor范耀峰
OwnerCHONGQING CHUANYI AUTOMATION