Improved electric actuator

Abstract

The invention relates to an improved electric executer. The electric executer comprises an executer body, and is characterized in that the executer body is controlled by a programmable controller to move; and a proximity switch is additionally arranged on the executer body, and induction signals of the proximity switch are connected to the programmable controller. According to the electric actuator, the improvement is made on the basis of an existing electric executer structure, in other words, a servo control circuit board likely to do mistaken actions and complex in adjustment is removed, the proximity switch is additionally arranged, the rotation turn number of a valve rod is measured, and the stroke of a valve is recorded through the turn number; and logic control is conducted through the program of the programmable controller, and the valve aperture adjustment and accurate positioning are achieved; and meanwhile, digital-to-analog conversion is conducted, and data are provided for an upper computer control system for switching amount feedback and control. The improved electric executer has the beneficial effects of being flexible in control, accurate in positioning, low in fault rate, safe, reliable, low in price and the like.

Description

technical field [0001] The invention belongs to the field of automatic control instruments, in particular to an improved electric actuator. Background technique [0002] PS series electric actuators can be used to adjust and control the opening and closing of valves and dampers in pipelines. PS series electric actuators include PSL and PSQ actuators, which are products launched by the German PS Automation GmbH actuator manufacturer, with high efficiency. High performance, low noise, long life, stable and reliable, and will not cause resonance of the actuator due to the process environment. However, the existing PS actuators have the following problems during use: 1. Misoperation or jamming is prone to occur; 2. The internal control board is aging, frequent failures occur, and the accessories are expensive; 3. The manufacturer of the electric actuator is updated. The product is fast, and accessories of the same model cannot be purchased, which makes the device unusable. Co...

AI Technical Summary

Problems solved by technology

However, the existing PS actuators have the following problems during use: 1. Misoperation or jamming is prone to occur; 2. The internal control board is aging, frequent failures occur, and the accessories are expensive; 3. The manufacturer of the electric actuator is updated. The product is fast, and the accessories of the same model cannot be purchased, which makes the device unusable

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