Electric actuator valve position detection device based on dual potentiometers

Abstract

The invention relates to an electric actuator valve position detection device based on dual potentiometers. The device is composed of a first conducting potentiometer, a second conducting potentiometer, a driving gear, a regulating gear and a low-speed part and a high-speed part of speed-reduction gear sets which are arranged coaxially; the driving gear and the regulating gear are regulated up and down in axial direction; a driven gear at the upper end of the driving gear is meshed with the first conducting potentiometer; a drive gear which is coaxially and fixedly installed at the lower end of the driving gear receives external power and is directly meshed with the high-speed part of the speed-reduction gear sets; the high-speed part of the speed-reduction gear sets is meshed with and drives the low-speed part of the speed-reduction gear sets; the low-speed part of the speed-reduction gear sets is meshed with and drives the bottom gear of the regulating gear; and the top gear of the regulating gear is meshed with and drives the second conducting potentiometer. According to the invention, the position generation part of the valve position detection device capable of counting for a plurality of circles is realized by adopting two conducting potentiometers and speed reduction gear sets, not only can multiple-circle counting be realized, but also the cost is controlled effectively.

Description

technical field [0001] The invention relates to an electric actuator, in particular to a valve position detection device for an electric actuator based on a double potentiometer. Background technique [0002] The electric actuator is the terminal executive device in the industrial process control system. Its main function is to convert the control signal sent by the upper computer control system into corresponding actions, so as to achieve the purpose of controlling the position of the shut-off member in the valve or the position of other adjustment mechanisms. It is widely used. Used in electric power, metallurgy, petrochemical, heating, cement, building materials, textile, food and other industries. [0003] At present, the position generating part of the valve position detection device of the electric actuator mainly includes two kinds of conductive potentiometer and incremental encoder. It is easy to maintain and is still widely used in many types of electric actuators....

AI Technical Summary

Problems solved by technology

[0003] At present, the position generating part of the valve position detection device of the electric actuator mainly includes two kinds of conductive potentiometer and incremental encoder. Easy to maintain and still widely used in many types of electric actuators

However, the use of an encoder with high precision and multi-turn counting not only greatly increases the technical difficulty, but also greatly increases the cost.

[0004] Through searching, no patent documents related to this patent application have been found

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