Nuclear power pump shaft seal locking device and method

The invention discloses a nuclear power pump shaft seal locking device and method, and belongs to the technical field of nuclear power pump seals. Physical locking of a hexagon socket head cap screw can be achieved; and meanwhile, a clamping tongue is reset under the action of a spring piece, so that the locking device can be disassembled. The nuclear power pump shaft seal locking device has the advantages of being simple in structure, high in locking reliability, low in cost, convenient to mount and dismount, capable of improving efficiency, capable of ensuring that a sealing connecting piece is not damaged and protecting shaft seal quality, and suitable for batch production. The nuclear power pump shaft seal locking device comprises a locking clamping seat, a sliding lock cylinder and a sliding block, and is characterized in that the locking clamping seat is matched with a connecting piece to be sealed through a hexagon socket head cap screw; the locking clamping seat is fixed to the hexagon socket head cap