Coiling furnace and its door and door device

By using heat-resistant steel plates to form an insulating cavity in the furnace door of the coiling furnace, and by utilizing circulating insulating gas and a purging mechanism, the problems of refractory material shedding and cooling water leakage were solved, achieving the effects of efficient heat insulation and simplified structure.

CN224517397UActive Publication Date: 2026-07-17WISDRI ENG & RES INC LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WISDRI ENG & RES INC LTD
Filing Date
2025-04-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, the design of the furnace door of the coiling furnace is complex in the process of using refractory materials, and there are problems such as refractory material falling off and cooling water leakage during use, which affect the reliability of the equipment and increase the difficulty of maintenance.

Method used

Heat-resistant steel plates are used as cover plates to form heat-insulating cavities. Heat-insulating gas is circulated through air inlet and outlet pipes. Combined with a purging mechanism, heat insulation and cooling are achieved, preventing refractory material from falling off and cooling water from leaking.

Benefits of technology

It effectively isolates heat conduction inside the furnace, reduces the risk of equipment damage, simplifies the structure, reduces maintenance costs, and improves production reliability.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224517397U_ABST
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Abstract

This utility model relates to a furnace door for a coiling furnace, comprising a bottom plate and a cover plate. The cover plate is supported on the bottom plate by a support structure, and the cover plate and the bottom plate are spaced apart, forming a heat-insulating cavity between them. It also relates to a furnace door device using this furnace door and a coiling furnace equipped with the furnace door device. In this utility model, by forming a heat-insulating cavity between the cover plate and the bottom plate, the conduction of heat inside the furnace can be effectively isolated, protecting the furnace bottom equipment. The solution in this utility model has a simple structure, which can reduce the design and manufacturing costs of the furnace door, avoid the problem of affecting the surface quality of the strip due to the use of high-temperature refractory materials, and avoid cooling water leakage when using cooling water, thus having high production reliability.
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