| 摘要 |
PURPOSE:To enable easy detection of the flow condition of fluid by transmitting the rotation of the valve spindle on which a magnetic plate is fixed to a spiral rod to drive a needle. CONSTITUTION:When fluid flows in a valve box 1, a valve body 2 parts from a valve seat 3 to become an opened valve condition. A magnetic plate 7 fixed at the end of a valve spindle 8 turns together with the valve spindle 8 in response to the movement of the valve body 2. The spiral rod 9 which is made of a magnetic metal and placed in a spiral chamber 6 adjacent to a magnetic plate chamber 17 is turned by magnetic force of a magnetic plate 7 in response to the movement of the valve body 2 together with a needle 10 which is fixed on an end of the spiral rod 9 by making spiral bearings 13 and 14 as bearings. The turned position of the needle 10 is confirmed by an indicating plate 12 fixed on a valve cover 5, and the flow of fluid in the valve box 1 can be detected. |
