Well-type high temperature carburizing furnace with down-inserted retort heat-insulation retainer ring structure

The invention discloses a well-type high temperature carburizing furnace with a down-inserted retort heat-insulation retainer ring structure. The well-type high temperature carburizing furnace comprises a retort, a heat-insulation packing, a stepped special-shaped brick, an oil pool, a furnace base and an anti-dropping ring. The well-type high temperature carburizing furnace is characterized in that the step profile brick is arranged in the peripheral direction of the furnace base; the heat-insulation packing is arranged between the retort and the step profile brick; the anti-dropping ring for preventing the packing from falling off is arranged below the heat-insulation packing. The position of the packing is effectively located by the special profile brick with a step, and the anti-dropping ring, so that the heat-insulation packing is prevented and stopped from displacing or falling into the sealing oil pool, direct heat radiation on the oil pool caused by high temperature inside the furnace is avoided, leakage of a burner gas is prevented, and the temperature of sealing oil is controlled, and the use safety of equipment is ensured.