Electrohydraulic follow-up device of speed adjuster for high-speed valve-controlled hydroturbine

The utility model relates to an electrohydraulic follow-up device of a high-speed switch valve control hydroturbine speed adjuster, which comprises a shutdown valve and a starting up valve both of which can receive pulsing signals emitted by a controller, wherein the shutdown valve and the starting-up valve are respectively connected in series with an electromagnetic reversing valve, the shutdown valve is connected in series with a first hydraulic lock and a first one-way throttle valve, and the starting-up valve is connected in series with a second hydraulic lock and a second one-way throttle valve; when the shutdown valve and the starting-up valve receive the pulsing signals emitted by the controller, the shutdown valve outputs signals to control the shutdown of a guide vane servomotor through the first hydraulic lock and the first one-way throttle valve, and the starting-up valve outputs signals to control the open of the guide vane servomotor through the second hydraulic lock and the second one-way throttle valve. The utility model adopts the high-speed electromagnetic switch valve as a core element of the electrohydraulic follow-up device, the digital signals are directly used for controlling the high-speed switch valve, and the utility model has the advantages of simple structure, low cost, strong oil stain resistant ability and high reliability.