Control module of high-pressure bypass pressure and temperature reducing valve actuating mechanism

Abstract

The invention relates to a control module of a high-pressure bypass pressure and temperature reducing valve actuating mechanism, belonging to the field of the hydraulic control technology. The invention aims to solve the technical problem of achieving the simultaneous existence of both two-step control and continuous control in the hydraulic control. The control module comprises an electric control unit, a hydraulic control unit and an oil cylinder for controlling a controlled valve, wherein the hydraulic control unit is provided with a pressure oil port and an oil return port. The control module is characterized in that the oil cylinder is a piston type oil cylinder with two working chambers; the control oil passage of the hydraulic control unit is divided into two ways, wherein one way is connected with the two working chambers of the oil cylinder from the pressure oil port through a quick control solenoid valve and a hydraulic control check valve, and another way is connected with the two working chambers of the oil cylinder from the pressure oil port through an electro hydraulic servo valve; the work of the quick control solenoid valve and the pilot-operated check valve is controlled by the electric control unit; and the oil cylinder is provided with a displacement sensor for sending the valve position signals of the controlled valve back. By utilizing the control module, the simultaneous existence of the two-step control and the continuous control can be achieved.

Description

technical field [0001] The invention relates to hydraulic control technology, in particular to the technology of a control module of an actuator of a high-side temperature and pressure reduction valve. Background technique [0002] There are two types of traditional valve actuator control: on-off type and regulating type. flow area. However, the high-side temperature and pressure reduction valves of coal-fired steam turbines not only need to be opened and closed quickly, but also need to be positioned correctly at any position and continuously controlled according to input instructions. Therefore, the above two control methods cannot be applied to high-side valves. Temperature and pressure reducing valve. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a control module suitable for the actuator of the high side temperature and pressure reducing valve, whi...

AI Technical Summary

Problems solved by technology

However, the high-side temperature and pressure reduction valves of coal-fired steam turbines not only need to be opened and closed quickly, but also need to be positioned correctly at any position and continuously controlled according to input instructions. Therefore, the above two control methods cannot be applied to high-side valves. Temperature and pressure reduction valve

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