| 摘要 |
<p>PURPOSE:To prevent parts from being worn-out even in the case of a pressure governor valve very frequently opened and closed, by allowing a movable iron piece to made contact under rolling with the yoke having a curved surface through a flapper. CONSTITUTION:The yoke 19 having a gently curved upper surface 19a is fixed onto an electromagnet 16. An elastic flapper 21 consists of a pair of branched pieces 21a, a center piece 21c which extends between said branched pieces, and the valve elements 22 and 23 fixed at the both edges, and a spring 24 is engaged with the projection part 20a of the movable piece 20 which is engaged with the flapper 21 from upper side. When the electromagnet 16 is brought into conduction, the movalbe piece 20 is attracted to a core 18, and the valve element 23 operates so that the valve opening is closed, and when the conduction is released, the movalbe piece 20 returns to the original position, and the valve element 22 closes the valve opening, while the above movement is effected as the rolling movement of the flapper 21 on the curved surface 19a.</p> |
