Dual-active-control high-pressure large-flow high-water-base digital throttle valve and control method

• Main Authors: HAN JING, DIAO QISHENG, ZHANG HE, ZHAO JIYUN, CAO CHAO, HUANG DI, WANG YUNFEI, WANG HAO, YU MURAN
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The invention relates to a double-active-control high-pressure large-flow high-water-base digital throttling valve and a control method, a main valve is of a symmetrical cylinder type structure and is provided with an upper control cavity and a lower control cavity, pilot valves are of two two-position three-way normally-closed ball valve structures, each ball valve is driven by a normally-open high-speed switch valve, and the two normally-open high-speed switch valves are driven by the pilot valves. Displacement of a pilot valve is controlled through a PWM duty ratio signal, then the pressure difference of two control cavities of a main valve is controlled to push a main valve element to move, and the output flow of the main valve is accurately controlled through a displacement sensor. The main valve is a cone valve, the pilot valve and the pilot valve drive are ball valves, and good sealing can be kept under the working conditions of pure water and high water base; the pilot valve adopts a pair of two-posit