Nuclear power helium compressor isolation and pressure maintaining maintenance device

The utility model discloses a nuclear power helium compressor isolation pressure maintaining maintenance device which comprises a closed bin, a sealing connector is arranged in the middle of the top end of the closed bin, a driving motor is installed at the top end of the sealing connector, and the power output end of the driving motor penetrates through the sealing connector to be connected with a transmission rod. A motor adjusting connector is arranged at the bottom end of the transmission rod, a plurality of hydraulic rods are installed on the inner wall of the closed bin below the motor adjusting connector, a supporting base is fixedly installed at the top ends of the hydraulic rods, and a compressor inlet is formed in one side of the closed bin in a penetrating mode; gas in a high-pressure environment in equipment is safely discharged without leakage through multiple valve fixation and a safe pressure relief mechanism, so that operation and steps during gas discharge in a maintenance process are reduced