A linear displacement measuring device for a circular intelligent valve positioner

Abstract

The invention discloses a linear displacement measurement device for a round intelligent valve positioner. The linear displacement measurement device comprises a linear displacement sensor (10A), a displacement measurement support (1A) and a displacement measurement connection piece (1B). The displacement measurement support (1A) is arranged in a sealing shell and located below a lower box body (9). The displacement measurement connection piece (1B) is installed on a base (7). The linear displacement sensor (10A) is fixed through the displacement measurement connection piece (1B).

Description

technical field [0001] The invention relates to a positioning mechanism, more particularly, to a circular intelligent valve positioner. It is a positioner that drives the stroke of the cylinder of the valve actuator by controlling the flow of the external air source, and realizes the control of the opening of the regulating valve or the switching valve. Background technique [0002] The automatic control of the production process is referred to as process control, which occupies an extremely important position in industrial production. The quality of process control largely depends on process control instruments, which include transmitters, regulators, actuators and various auxiliary control devices. An auxiliary control instrument is called a valve positioner, which is the object of competing research in various countries. It determines the adjustment quality of process control to a certain extent. With the development of process control level, the positioner must also con...

AI Technical Summary

Problems solved by technology

[0006] From the 1970s to the early 1980s, this kind of locator accounted for about 85% to 90% of the scope of use in my country. The disadvantages of the mechanical force balance structure are: poor environmental resistance, easy to be affected by temperature and external vibration, easy to wear, and manual adjustment is time-consuming and needs to be interrupted. Control loop

[0010] At present, the research focus of the positioner is mainly on the intelligent valve positioner. The electric valve positioner used adopts the principle of mechanical force balance, which has some shortcomings and cannot meet the needs of the development of process control.

Images