FIRE-PREVENTION DOOR AND FIRE-PREVENTION DOOR FRAME

摘要

FIELD: construction.SUBSTANCE: fire-prevention door and fire-prevention door frame are proposed. A fire-prevention door comprises a water-receiving part, a groove, a water expansion substance, an inlet device and many supply holes. The water receiving part holds water. The groove is arranged along the edge of the fire-prevention door. The water expansion substance is placed into the groove along the edge and expands as water is absorbed for sealing of the gap between the door frame and fire-prevention door. The inlet hole is arranged in the lower part for supply of water into the water receiving part. Multiple supply holes are arranged along the groove between the water-receiving part and the water expansion substance to supply water contained in the water receiving part, via the inlet hole to the water expansion substance.EFFECT: design improvement.8 cl, 10 dwg