| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve body of a butterfly valve capable of enhancing strength by dispersing stress when the valve is closed while enhancing torque performance when operating the valve by reducing the weight of the whole body. <P>SOLUTION: In the valve body of the butterfly valve in which the vertical boss 2 of disc-shape valve body 1 is continuously arranged in a longitudinal direction, the tubular hexagonal cross-sectional part 3 is formed in the center the area T of the boss 2 and the tubular circular cross-sectional parts 4 are formed near the stem fitting parts 8 at the top and the bottom other than the hexagonal cross-sectional part 3 in the valve body 1 of the butterfly valve. The boss 2 and the valve wing parts 5 are connected by the connection R parts 7 and the connection R parts 7 are connected by gradually changing part R6 set gradually from the small connection R to the large connection R from both top and bottom of the circular cross-sectional part 4 to the center 3b of the hexagonal cross-sectional part 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
