Steel fire door with thermal insulation sandwich

By using fireproof core panels with insert plates and slots in fire doors, combined with samarium cobalt magnets and fireproof expansion sealing strips, the problems of reduced heat insulation performance and poor sealing caused by loose splicing of fire doors are solved, achieving higher fireproof and heat insulation effects and structural stability.

CN224532576UActive Publication Date: 2026-07-21GUANGZHOU ZHONGCHENG BOYUAN DOOR IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGZHOU ZHONGCHENG BOYUAN DOOR IND CO LTD
Filing Date
2025-08-27
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing steel fire doors with heat-insulating layers are prone to loosening at the joints, resulting in reduced heat insulation performance, poor sealing effect, and inability to effectively prevent the spread of smoke.

Method used

The fireproof core board adopts a plate and slot structure, combined with samarium cobalt magnets and fireproof expansion sealing strips. The plate and slot are connected by attraction through samarium cobalt magnets. The fireproof expansion sealing strip expands and seals during a fire. The heat insulation board forms air grooves to reduce heat conduction. The cover plate and fireproof expansion seal further seal the gaps.

Benefits of technology

It improves the sealing, heat insulation and structural stability of fire doors, enhances fire resistance in the event of a fire, and ensures that the door is not easily loosened and heat is not easily leaked.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224532576U_ABST
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Abstract

The utility model relates to steel fireproof door technical field discloses a kind of steel fireproof doors with heat insulation interlayer, including door frame, the door frame inside rotationally connected with door leaf panel, the door frame with the door leaf panel is connected by fireproof hinge, the door leaf panel inside fixedly connected with composite heat insulation type fireproof glass, the door leaf panel outer wall is provided with fireproof lock, the door leaf panel outer wall is provided with protection assembly, the protection assembly includes multiple fireproof core board and fireproof expansion sealing element, multiple the fireproof core board outer wall setting in the door leaf panel inside.The utility model is small, and the heat insulation core is set to be with plugboard type and with slot type, and is closed and guided splicing by fireproof expansion sealing strip and samarium-cobalt magnet, air groove is formed to reduce heat transmission and friction by heat insulation plate, the problem that traditional fireproof door heat insulation core splicing is not firm, heat is easily conducted, and sealing is insufficient is solved, and the fireproof sealing property, heat insulation, structural stability and durability are improved.
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