| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flow control device that can smoothly rotate a valve element that controls a flow passage of a fluid without being obstructed by a foreign substance flowing in a fluid pipe. <P>SOLUTION: The flow control device includes: a casing 2 mounted in a sealed state on a fluid pipe 1; and a flow control element 11 having a valve box 13 installed with tightly adhered to an inner surface of the casing 2 and having communication ports opening from an upstream side to a downstream side of the fluid pipe 1, and a valve element 14 rotatably and pivotally supported by axes 15b, 15c disposed in the valve box 13 and opening and closing the communication ports to control a flow passage of the fluid in the fluid pipe 1. The valve element 14 is composed of a blocking part 14b to block the communication port and bottom plates 14a, 14e, 14e interposed between the blocking part 14b and the axis 15b and rotating along an inner bottom surface 13g of the valve box 13. The bottom plates 14a, 14e, 14e are formed to cover substantially the whole area of the inner bottom surface 13g of the valve box 13. <P>COPYRIGHT: (C)2013,JPO&INPIT |
