Electric valve working status monitoring system

Abstract

The invention discloses an electric valve working state monitoring system, relates to the technical field of valve monitoring, and provides guarantee for the production process of the process industry. The system is mainly composed of a control unit, a drive unit, a display unit and a body structure of an electric valve. The control unit includes a processor, communication port, signal input / output port, power port, etc.; the drive unit is composed of a 24V switching power supply, a motor drive board, and a communication converter; the display unit is composed of a liquid crystal display and a membrane keyboard; the electric valve is composed of a DC Brushless motor, cylindrical gear, worm gear, limit switch, valve stem, valve core and valve body; each hardware unit is connected by wires to form a complete electric valve drive control system. The invention has the advantage of being able to grasp the operating state of the electric valve in real time, and quickly find out the cause of the abnormal phenomenon to reduce material loss.

Description

technical field [0001] The invention relates to the technical field of valve monitoring, in particular to a system for monitoring the working state of electric valves. Background technique [0002] The electric valve is an important device responsible for flow regulation in the process industry. Take the most widely used domestic ZJKV electric valve as an example. This electric valve is an actuator of the DCS system, and the electric valve itself does not have a monitoring system. The number of operating steps of the ZJKV electric valve is 100 steps. For the angular stroke of 0-90°, each operating step makes the valve core rotate by 0.9°, corresponding to a certain flow rate increase. The positioning accuracy of the electric valve determines the accuracy of the fluid flow. When there are fluctuations in the positioning process of the electric valve, it will inevitably lead to fluctuations in the flow value. The accuracy of electric valves is usually measured according to th...

AI Technical Summary

Problems solved by technology

However, the price of this type of high-precision electric valve is very expensive, and it is not suitable for popular application. For example, the market price of a single DN150 high-precision valve is about 180,000 yuan, which discourages many domestic companies.

[0004] At present, there are no technical products with suitable economic indicators in the market, and the process industry has to hover between ZJKV and VBW products for electric valves. Therefore, it is meaningful to develop a small-scale condition monitoring system for electric valves.

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