Maintenance and replacement device

The utility model discloses a maintenance and replacement device, which is used for maintaining or replacing parts connected with a stirring shaft and comprises a supporting mechanism, the lifting mechanism comprises a pull rod, the pull rod is connected with the stirring shaft, the pull rod is connected with the supporting mechanism through a lifting connecting structure, and the pull rod can ascend or descend relative to the supporting mechanism. According to the maintenance and replacement device disclosed by the utility model, the supporting mechanism is supported and fixed at the top of the tank body, and the pull rod is connected with the stirring shaft from the top of the tank body, so that the stirring shaft cannot fall after the locking sleeve is detached, and after the sealing ring is replaced, the pull rod drives the stirring shaft to rise to a mounting position, and the motor assembly is mounted and fixed with the locking sleeve; and the pull rod is separated from the stirring shaft, so that the w