Composite sealing ring for main equipment access door of sodium cooled reactor

The utility model discloses a composite sealing ring for a main equipment access door of a sodium cooled reactor, which comprises a sealing ring main body with a C-shaped cross section and an opening, and is characterized by further comprising a supporting piece and a metal frame body, the supporting piece is arranged at the center of the sealing ring main body, and the metal frame body is arranged on the supporting piece. And the metal frame body is arranged in the sealing ring main body. Through the composite sealing ring comprising the sealing ring main body, the supporting piece arranged in the sealing ring main body and the metal frame body, the sealing of the main equipment channel door of the sodium cooled reactor is realized, and the sealing device has the characteristic of keeping sealing for 4 hours without leakage under the condition of the temperature of 531 DEG C, and can meet the sealing technical requirements of sodium fire accidents. 本实用新型公开了一种钠冷堆主设备通道门用复合密封圈，包括密封圈主体，所述密封圈主体截面形状为C形，所述密封圈主体包括开口