Patent ID: 9121517
Filing Date: 2015-09-01
Classification: F16K,H01H,Y10T

Abstract:
1. A rupture disk for a gas insulated switchgear, the rupture disk comprising: a thin dome plate including a first flange portion and a first dome-shaped portion formed in a dome shape at the center of the first flange portion; a rupture guide plate laminated inside the first flange portion and the first dome-shaped portion and including a second flange portion laminated on the first flange portion and a second dome-shaped portion having a plurality of slots formed to define a rupture shape so that a part of the first dome-shaped portion is ruptured in a predetermined shape when an internal pressure increases; a thin protecting plate laminate outside the first flange portion and the first dome-shaped portion so as to protect the thin dome plate and including a third flange portion laminated on the first flange portion and an open dome-shaped protecting surface protecting an outer portion of the first dome-shaped portion; and a foreign material blocking layer disposed on an inner side of the second dome-shaped portion or between the thin dome plate and the rupture guide plate, and the foreign material blocking layer being configured to block sand or foreign material from penetrating into the plurality of the slots.