HYDRAULIC DRIVE FOR A POWER HIGH VOLTAGE SWITCH Russian patent published in 2018 - IPC H01H33/34 

FIELD: engineering.

SUBSTANCE: to be used in engineering, in the complete gas insulated switchgears of power substations, at nuclear-powered icebreakers, etc. Task: to ensure reliability of operation in different climate conditions. Summary of the invention: The drive comprises a hydraulic cylinder with a piston and a rod connected to the movable contact of the switch, a pump unit, a hydraulic system with a safety valve, an overvoltage and an undervoltage relay, providing work under different climate conditions, and an energy storage unit. Pump unit is designed as a low-pressure pump and duplicated pressure boosters, connected to the hydraulic system with a docking device. Energy storage unit consists of gas-hydraulic accumulators, mounted on the plug-forming pipes of the hydraulic cylinder flange with the possibility of disconnection and replacement, which are a pressure vessel with a locking neck for a liquid, that comprises a metal bellows inside, one end of which is movable, and the other end is tightly fixed to the wall of the vessel and is equipped with a charging valve for the gas.

EFFECT: technical result: the described pumping unit and energy storage unit ensures a continuous uninterrupted operation of the drive in any climate conditions.

3 cl, 3 dwg