| 摘要 |
PURPOSE:To make a solenoid part providable at the outside of a gas ambience as well as to prevent its capacity from degradation by gas, by making up a solenoid valve with a permanent magnet, a coil, a moving core, a valve shaft, a spring and a smaller diametral bellows than a valve disc installed between a setting flange and the valve shaft. CONSTITUTION:An armature 110 is locked through caulking at the bottom surface center of an almost U-shaped yoke 109, while a coil 112 rolled round on a bobbin 111 is situated between the armature and the yoke 109 at the periphery, and two flat permanent magnets 114 held by a support frame 113 are installed there. A moving core 15 is slidably installed in the central hole, and a T-shaped valve shaft 119 is locked to a concave part 118 whereby a valve disc 123 is made up by dint of reaction force of a spring 122. At the central part of a flange 124, a fixed end 128 of a bellows 127 is locked there and a free end 130 is inserted into a groove of the valve shaft 119. Under the closed condition, gas pressure acts in a closing direction due to an areal difference between the valve disc and the bellows. |
