Segmental control integration-type electro-hydraulic digital valve

Abstract

The invention discloses a segmental control integration-type electro-hydraulic digital valve comprising an electromagnetic directional valve and two electromagnetic ball valves which are connected in parallel, wherein the electromagnetic directional valve is serially connected with parallel-connected hydraulic control one-way valves, the electromagnetic ball valves are serially connected with thehydraulic control one-way valves respectively, and the electromagnetic directional valve, an electro-hydraulic control one-way adjustable throttle valve and two electromagnetic ball valves are connected with a PWM (pulse-width modulation) amplifier respectively. The segmental control integration-type electro-hydraulic digital valve solves the industrial application problem that the different flowrates can be segmentally controlled, and has the advantages of high precision and quick response, and works reliably.

Description

technical field [0001] The present invention is an electro-hydraulic digital valve with an integrated parallel multi-section structure consisting of an electromagnetic reversing valve, an electromagnetic ball valve, and an electro-hydraulic control one-way adjustable flow valve. The integrated electro-hydraulic digital control system realizes segmental control of actuator "start" and "stop". Background technique [0002] The flow rate of various existing digital valves is small, and it is difficult to meet the high-speed control application requirements required by the industry; the incremental digital valve developed in Japan can achieve a large flow rate, but its structure is complex, and its processing accuracy and matching accuracy are comparable to those of servo motors. It is difficult to meet the requirements of industrial applications; especially in industrial applications that need to control different flows in stages, such as in industrial production, it is necessa...

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Problems solved by technology

[0002] The flow rate of various existing digital valves is small, and it is difficult to meet the high-speed control application requirements required by the industry; the incremental digital valve developed in Japan can achieve a large flow rate, but its structure is complex, and its processing accuracy and matching accuracy are comparable to those of servo motors. It is difficult to meet the requirements of industrial applications; especially in industrial applications that need to control different flows in stages, such as in industrial production, it is necessary to complete a set of actions, including fast or medium speed forward (or backward), It also includes slow approach and micro-movement for accurate positioning. It is difficult for general servo valves and proportional valves to solve this problem.

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