Universal connection structure for fire doors
By using a combination structure of stainless steel base layer, chromium alloy layer and alloy steel material layer in fire door hinges, and coating with anti-oxidation and fire-retardant topcoat, the problem of low strength of fire door hinges at high temperatures is solved, achieving better high-temperature resistance and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI KAIGU BUILDING MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-16
AI Technical Summary
The existing common connection structure of fire doors has low strength under high temperature conditions, which leads to hinge damage and affects the connection effect of the fire door.
The hinge features a strength layer composed of a stainless steel base, a chromium alloy layer, and an alloy steel layer, with an anti-oxidation layer and a fire-retardant topcoat coating on its outer surface, forming a multi-functional structure that provides heat insulation, fire resistance, and corrosion protection, thereby enhancing the hinge's high-temperature resistance.
It improves the high-temperature resistance and service life of the hinges, ensures the stability and reliability of the structure in high-temperature environments, prevents oxidation and corrosion, and extends the service life of the hinges.
Smart Images
Figure CN224363784U_ABST