| 摘要 |
PURPOSE:To prevent a flow of foreign substances removed by flushing from going to the downstream, by installing a blade member projectingly in the lower part of an inner circumference of the peripheral wall of a valve body as well as installing a small chamber being coupled with a drain pipe, in the circumference of the valve body. CONSTITUTION:A lot of taper-form small holes 11 turning into a large diamter at th circumferential side are made up at the peripheral wall of a valve body, and plural blade members 14 are projectingly installed in the lower part of an inner circumference of the peripheral wall of the valve body 10 at regular intervals in a circumferential direction. And, a small chamber 17 being coupled with a drain pipe 18 is formed up in the circumference of the valve body 10, and a stop valve 19 is installed in the drain pipe 18. In time of flushing these small holes, when the stop valve 19 is opened in a state that a flow control part 12 is situated in an inflow chamber 7, a fluid from an inflow port 2 enters inside the valve body 10 by way of these small holes 11 and further enters the small chamber 17 through these small holes 11, flushing these holes clean, and then is discharged outside by way of the drain pipe 18. At this time, the valve body 10 is rotated by the blade member 14 whereby these small holes can be flushed clean over the whole circumference and, what is more, foreign substances will not flow into a pipe line at the downstream at all. |
