| 摘要 |
<p>PURPOSE: To prevent disruption of a blow-out portion in a rupture disc by arranging a supporting member arranged in an annular supporting member in a concave type recess of the rupture disc and supporting the blow-out portion by means of the supporting member when the rupture disc is reversed or ruptured. CONSTITUTION: An annular supporting member 26 is provided with a supporting member 50 supporting a rupture disc 22 when it is reversed or ruptured. In the supporting member 50, its upper part is formed into a round surface 56 which is not brought into contact with the rupture disc 22, while a hinge area 44 of the rupture disc 22 is brought into contact with the surface 56, and the rupture disc 22 and the surface 56 are kept apart until a dome part 32 is reversed. The supporting member 50 is extended inward radially, so that the hinge 44 area is supported by the surface 56 when the rupture disc 22 is brought into contact with the supporting member 50. Though a blow-out portion 43 of the rupture disc 22 is broken along a fragile part of a groove 42, it remains while sticking to the rest part of the rupture disc 22 by means of the supported hinge 44. Because of contact between the rupture disc 22 and the supporting member 50, rupture proceeds slowly, so that disruption of the blow-out portion 43 can be prevented.</p> |
