Corrugated pipe valve element assembly capable of preventing valve rod from rubbing weld bead

The utility model discloses a bellows valve core assembly preventing valve rod friction weld bead, which comprises a valve rod, a bellows, a valve seat and a bushing ring, two sides of the bellows are respectively provided with a straight opening welding pipe and a flaring welding pipe, the straight opening welding pipe is arranged on the outer ring of the far end of the valve rod, and the flaring welding pipe is arranged on the outer ring of the near end of the valve rod. The far end of the valve rod and the corrugated pipe are welded, sealed and fixed, the bushing ring is arranged on an inner ring of the flaring welding pipe, and the flaring welding pipe, the bushing ring and the end of the valve seat are welded and fixed. According to the utility model, the welding structure of the corrugated pipe and the valve seat is improved, so that the valve rod does not directly rub a welding bead in the closing and opening movement process, and the abrasion leakage of the welding bead of the corrugated pipe and the