| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow control valve of simple structure with a small number of parts items, low in the manufacturing costs and having high reliability on the device. SOLUTION: This flow control valve 1 comprises: a first valve chamber 5 communicated with a first flow passage 3a, and communicated with a second flow passage 4a through a valve seat 5a; a valve element 6 arranged inside the first valve chamber to be brought in contact or separated with/from the valve seat; a valve rod 8 for controlling a flow rate between the first flow passage and the second flow passage by moving in the axial direction to bring the valve element in contact or to separate it with/from the valve element; a through-hole 8a passing through the valve rod to communicate the second flow passage with a second valve chamber 14; and a moving body 7 moving in the axil direction of the valve rod, being interlocked with the valve rod to partition the first valve chamber and the second valve chamber from each other. It is desirable to provide a rotor 18 rotating around an axis in the state of limiting movement of the valve rod in the axial direction and a transmitting screw 22 to be moved in the axial direction of the valve rod, being rotated with the rotor, in one end thereof and screwed to the valve rod in the other end thereof to move the valve rod in the axial direction of the valve rod and in the same direction as the moving direction of the one end in the state of limiting rotation of the valve rod around the axis of the valve rod. COPYRIGHT: (C)2010,JPO&INPIT
|
