Quarter-turn butterfly valve

• Main Authors: WEI TONGJU, XIA CHUNJU, CHEN XINGXING, DONG XINPING, TANG TAO, SONG LAIFU, TANG HAIZHOU, PENG CHUANGCHUANG, GAN XIAOYAN
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2017
• 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 invention discloses a quarter-turn butterfly valve which comprises an operation handle, a butterfly plate and a valve body. Four protruding blocks of the valve body are each provided with a fixing bolt hole. The butterfly plate is arranged in the valve body, a rotating shaft is welded to the middle of the butterfly plate, the rotating shaft penetrates through the valve body, a first fixing ring and a second fixing ring with the certain distance are welded to the top of the rotating shaft, a moving ring with which the rotating shaft is sleeved is arranged between the first fixing ring and the second fixing ring, and the joint between a bent connection rod and the rotating shaft is provided with a fixing base. The butterfly plate is provided with a limiting groove, and a semi-toroidal convex block is arranged in the valve body and corresponds to the limiting groove in position. When the butterfly plate needs to be closed, the position of the semi-toroidal convex block can be moved through a connection bolt,