| abstract |
The invention discloses a preparation method of a C-type sealing ring for a passage door of a main equipment of a sodium-cooled reactor, comprising: step 1: extruding a material for a temperature-resistant layer and a material for an elastic layer with an extruder to obtain a strip-shaped embryo body ; The cross section of the strip-shaped embryo body includes a core and a ring that surrounds the core, and the core is an extruded part of the material for the elastic layer; the ring is a material for the temperature-resistant layer. Extrusion part; Step 2, enclose the strip-shaped body in the mold cavity, overlap the two ends of the strip-shaped body, and close the mold; Step 3, place the mold with the strip-shaped body in the oven Vulcanization in the room; Step 4: Stop heating, and when the temperature of the drying room drops to ≤50°C, remove the mold, open the mold, and trim the edges to obtain a C-shaped sealing ring. The C-type sealing ring can meet the structural requirements of maintaining structural integrity at 531 °C, the leakage rate is far lower than the technical indicators of nuclear power equipment, and it has the sealing ability that conventional materials cannot provide. |