Double-layer thermal insulated composite sealing device for feed opening

Abstract

The invention discloses a double-layer thermal insulated composite sealing device for a feed opening. The double-layer thermal insulated composite sealing device comprises an upper flange and a lower flange, wherein a pressing strip is welded on the upper flange; a fixing strip is welded on the lower flange at a position corresponding to the pressing strip; a double-layer sealing strip is arranged in the fixing strip; in the assembly process, the pressing strip on the upper flange is pressed on the double-layer sealing strip in the fixing strip, and is fixed by a high-strength bolt and a nut. With adoption of the structure, the double-layer thermal insulated composite sealing device can prevent heat in a furnace from damaging the sealing strip in the long-term use, prolong the service life of the sealing strip, reduce the replacement costs and materials, improve the sealing effect, reduce the leakage of furnace atmosphere and heat, protect the workshop environment, improve the quality of products after thermal treatment in the furnace, and reduce the decarburization and darkening of products due to gas leakage.

Description

technical field [0001] The invention belongs to the technical field of the sealing structure of the feeding port of a heat treatment furnace, and in particular relates to a double-layer heat-insulating composite sealing device for the feeding port that adopts a unique high-temperature double-sealing technology to ensure the sealing effect and prevent air from entering the furnace. Background technique [0002] The current sealing structure of the feeding port of the heat treatment furnace mostly adopts flange flat sealing or a single sealing material. Because the internal temperature of the feeding port is high, it can only isolate the temperature in the furnace. After long-term use, the temperature difference between the inside and outside of the feeding port exceeds 300 Therefore, air leakage will occur in heat treatment production, which will lead to unstable atmosphere in the furnace, easy decarburization of products, black appearance, and waste of energy due to temperatu...

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Problems solved by technology

[0002] The current sealing structure of the feeding port of the heat treatment furnace mostly adopts flange flat sealing or a single sealing material. Because the internal temperature of the feeding port is high, it can only isolate the temperature in the furnace. After long-term use, the temperature difference between the inside and outside of the feeding port exceeds 300 Therefore, air leakage will occur in heat treatment production, which will lead to unstable atmosphere in the furnace, easy decarburization of products, black appearance, and waste of energy due to temperature and atmosphere overflow. and pollution

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