Airtight ring of steel smelting RH vacuum furnace

The utility model discloses a steel smelting RH vacuum furnace airtight ring in the field of RH vacuum furnaces, which comprises a protection mechanism arranged on an airtight ring body, the airtight ring body is divided into an outer ring, an inner ring and an outer ring ring, the outer ring ring is fixedly sleeved outside the outer ring, and the inner ring is fixedly arranged inside the outer ring. According to the utility model, the airtight ring body is clamped on the RH vacuum furnace, namely, the limiting ring of the RH vacuum furnace is clamped in the limiting groove, and the convex ball on the surface of the outer ring is clamped on the RH vacuum furnace, so that by adopting the design, the airtight ring body is not easy to fall off, is convenient to take down and replace, and is better in airtightness; therefore, the normal use of the RH vacuum furnace is ensured; due to the fact that the anti-aging coating layer, the anti-crack coating layer and the anti-oxidation coating layer are coated on the sur