Fireproof door capable of blocking off crack after meeting heat

Abstract

The invention discloses a fireproof door capable of blocking off a crack after meeting heat. The sealing device for blocking off the crack can resist fire for more than three hours and can be matched with the fire-resistant time of a fireproof steel frame; the edge of the door leaf or the door frame of the fireproof door is provided with a dovetail groove; a U-shaped sealing steel tank is arranged in the dovetail groove; the notch of the sealing steel tank faces to the bottom of the dovetail groove; a thermal expansion device is arranged in the inner cavity of the sealing steel tank; the edge of the door leaf or the door frame opposite to the orientation of the notch of the dovetail groove is provided with an elastomer collection tank; an elastic sealing adhesive tape is arranged in the elastomer collection tank; the middle of the outer side of the sealing steel tank is connected with an outward-bending elastic member; the elastic member is clamped on the inner side of the notch of the dovetail groove; in the normal use process, the elastic member is tightly embedded to seal the steel tank; the notch of the sealing steel tank is provided with an outward-bending bending part; when the sealing steel tank is outwards popped up, the bending part is clamped on the inner side of the notch of the dovetail groove.

Description

technical field [0001] The invention relates to a fireproof door capable of closing the gap between a door frame and a door leaf, or between a door leaf and a door leaf when a fire strikes, and sealing the gap when encountering heat. Background technique [0002] In order to facilitate the opening and closing of passable doors, there are generally gaps between the door frame and the door leaf, and between the door leaf and the door leaf. In the event of a fire, in order to prevent the fire from spreading, the door gap must be blocked. [0003] CN2529991U discloses a security door for anti-theft, fire prevention and smoke prevention. The edges of the door leaf are all U-shaped groove structures. Magnetic fireproof rubber strips are also embedded in the holes. The magnetic fireproof rubber strips foam and expand when they encounter flames, completely isolating the circulation of indoor and outdoor air, and play the role of preventing smoke and fire. [0004] CN2911148U disclo...

AI Technical Summary

Problems solved by technology

[0008] The fire-resistant material strips that expand when exposed to heat are easily ablated and burned through at high temperatures. Therefore, the fire-resistant time of the above-mentioned fire-resistant doors is still relatively short, and cannot meet the high-level fire-resistant requirements of more than 3 hours.

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