Heat-insulation expansion high-temperature-resistant fireproof door frame

By designing frames of varying widths and combining components such as polyurethane thermal insulation strips and curved heat-conducting strips, multiple thermal insulation barriers are formed, solving the problem of rapid heat transfer in metal fire door frames and achieving improved high-efficiency thermal insulation and fire resistance.

CN224260154UActive Publication Date: 2026-05-19JIANGSU NAT FIRE FIGHTING EQUIP CO LTD
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Patent Information

Application Number
CN202520901244.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-09
Publication Date
2026-05-19
Estimated Expiration
2035-05-09

AI Technical Summary

Technical Problem

Existing fire door frames are made of metal, which has high thermal conductivity. This makes it easy for heat to be transferred from the fire-exposed side to the unexposed side, causing the door frame temperature to rise. This may accelerate the combustion of combustibles and reduce the fire resistance and safety performance.

Method used

The design employs a first and second frame with different widths, combined with components such as polyurethane thermal insulation strips, arc-shaped heat-conducting strips, and fireproof sealing strips, to form multiple thermal insulation barriers, reduce heat conduction, improve heat dissipation capacity, and prevent the spread of smoke through the expansion of polymer materials.

Benefits of technology

It effectively blocks heat transfer, reduces the temperature of the door frame, prevents the spread of fire, and improves the heat insulation and safety performance of fire door frames.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model discloses a heat-insulation expansion high-temperature-resistant fireproof door frame which comprises a door frame body, polyurethane heat-insulation strips, right-angle fixing pieces and arc-shaped heat conduction strips, the door frame body is composed of a first frame and a second frame, and a first heat-insulation filling strip, a second heat-insulation filling strip and a third heat-insulation filling strip are arranged in the first frame and the second frame. The right-angle fixing pieces are welded to the first frame and the second frame, and the arc-shaped heat conduction strips are fixedly connected to the surface of the first frame. The width of the first frame is larger than that of the second frame, the second frame serves as a fire receiving face of the door frame, heat absorbed by the door frame can be reduced, heat conducted by the second frame is dissipated through the first frame and the aluminum strips, the heat dissipation capacity of the door frame is improved, and the heat insulation capacity is good. The first heat-insulation filling strip, the second heat-insulation filling strip and the third heat-insulation filling strip are separated by the polyurethane heat-insulation strips, so that a plurality of heat-insulation barriers can be formed, heat conduction is blocked, and the temperature of the door frame is reduced.
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