Integrated type electro-hydraulic drive regulating valve and control method

Abstract

The invention discloses an integrated type electro-hydraulic drive regulating valve and a control method. The integrated type electro-hydraulic drive regulating valve comprises a valve body, a valve element and a valve rod which are connected are arranged in the valve body, the valve rod is connected with a lower piston rod of a double-outlet-rod-symmetrical hydraulic cylinder through a flexible connection sleeve, and a valve position detection sensor is arranged at the top end of an upper piston rod of the double-outlet-rod-symmetrical hydraulic cylinder. In addition, an upper oil port and a lower oil port of the double-outlet-rod-symmetrical hydraulic cylinder are communicated with two oil outlets of a two-way gear pump, and the two-way gear pump is connected with a motor and driven by the motor to operate. A frequency changer is arranged on a common motor and connected with a single-chip microcomputer control unit. The integrated type electro-hydraulic drive regulating valve is small in size and light, the function of controlling the motor is achieved in the mode that the frequency changer is combined with the common motor, the good cost performance is achieved, the output pressure and the flow of an electro-hydraulic drive system can be automatically regulated along with changes of loads, the service life of the regulating valve is prolonged, long-time stable operation of the system is guaranteed, and high reliability is achieved.

Description

technical field [0001] The invention relates to an integrated electro-hydraulic drive regulating valve formed by a plug-in structure and a control method, belonging to the technical field of regulating valves. Background technique [0002] Control valve is one of the key equipment of industrial process control system, widely used in thermal power generation, nuclear power, chemical industry and other fluid control occasions, and is the most commonly used terminal control element in industrial production process. The electro-hydraulic drive regulating valve combines the advantages of electronic technology and hydraulic technology, and has the characteristics of large output power, fast response, high control precision, and flexible signal processing. However, the traditional electro-hydraulic drive control valve requires complex oil pipelines, with a bulky and heavy hydraulic station, which brings inconvenience to the transportation, installation and maintenance of the contro...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of the existing electro-hydraulic drive control valves, such as large volume and the need to build complex oil pipelines, etc., and provides an electro-hydraulic drive control valve with a compact structure and almost no oil pipeline connection

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