Torsional fatigue test device for seawater expansion joint of nuclear power station condenser

The invention belongs to the technical field of nuclear power station sealing test equipment, and particularly relates to a nuclear power station condenser seawater expansion joint torsional fatigue test device. The device comprises an actuating system, an expansion joint, a left supporting shaft, a right supporting shaft, a left bracket and a right bracket, the left and right ends of the expansion joint are fixedly connected with the left support shaft and the right support shaft respectively; the left supporting shaft is fixed on the left bracket, and the right supporting shaft is rotatably fixed on the right bracket; the actuating system is connected with the expansion joint and provides reciprocating torsion power; and a water inlet valve, a water outlet valve and a pressure gauge are arranged on the expansion joint. The device can accurately detect the torsional fatigue performance of the rubber expansion joint, and ensures that a rubber product can stably run for a long time after being installed in a s