Valve seat locking mechanism for butterfly valve

• Main Authors: ZHANG LIMIN, ZOU NING, CAO YINSHAN, JIN FENGLU, XIE TING, MA XIUBAO
• Format: Patent
• Language: Chinese; English
• Published: 15.01.2014
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model discloses a valve seat locking mechanism for a butterfly valve. The mechanism comprises an annular valve body, an annular valve seat, an annular press ring and an annular pressing ring composed of at least three annular clacks. The annular valve seat, the annular press ring and the annular pressing ring are sequentially arranged. A plurality of first screws are arranged corresponding to each pressing ring. Annular first flanges and annular grooves are formed in the inner peripheral side of the valve body alternatively, annular protrusions corresponding to the grooves are arranged on the outer peripheral side of each pressing ring, the first screws are in threaded connection with the pressing ring, one end of each first screw abuts against one side of the press ring, the other side of the press ring abuts against one side of the valve seat, the other side of the valve seat abuts against the first flanges, and the protrusions are clamped in the grooves. The press ring and the valve body are in