Pit-type high-temperature carburizing furnace with bottom-inserted furnace tank heat-insulating retaining ring structure

Abstract

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.

Description

technical field [0001] The patent of the present invention relates to heat treatment equipment, and specifically refers to the structural technology of the high-temperature well-type carburizing furnace of the heat treatment equipment. Background technique [0002] In order to prevent the thermal deformation of the furnace tank, most of the existing large-scale well-type carburizing furnaces use a bottom-sliding type furnace tank. When the working temperature of the carburizing furnace exceeds 950°C, the furnace tank will expand due to heat. When the atmosphere pressure in the furnace When the size increases, the insulation packing placed between the furnace base and the furnace tank is easy to shift or fall into the oil pool, resulting in leakage of hot gas, rise in oil temperature, and safety accidents such as sealing oil fire, which seriously affects high temperature penetration. Normal use of the carbon stove. Contents of the invention [0003] The present invention p...

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Problems solved by technology

[0002] In order to prevent the thermal deformation of the furnace tank, most of the existing large-scale well-type carburizing furnaces use a bottom-sliding type furnace tank. When the working temperature of the carburizing furnace exceeds 950°C, the furnace tank will expand due to heat. When the atmosphere pressure in the furnace When the size increases, the insulation packing placed between the furnace base and the furnace tank is easy to shift or fall into the oil pool, resulting in leakage of hot gas, rise in oil temperature, and safety accidents such as sealing oil fire, which seriously affects high temperature penetration. Normal use of carbon stove

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