Steel fireproof door with fireproof door lock pin device

Abstract

The invention discloses a steel fireproof door with a fireproof door lockpin device, which comprises a door frame, a door leaf, a fireproof hinge, a lockpin device, and a fireproof expansion sealing strip. sleeve, fixed sleeve, bolt, compression spring, fuse, end cap, fireproof expansion rubber ring; the bolt is set in the fixed sleeve, fits with the inner hole of the fixed sleeve, and the fireproof expansion rubber ring is fixedly connected in the socket; the bolt faces the socket There is a stepped shaft end at one end of the sleeve, and the stepped shaft end can be inserted into the inner hole of the fireproof expansion rubber ring; the end cover is fixedly connected to the end of the fixed sleeve facing away from the sleeve; there is a fuse and a compression spring between the pin and the end cover; The two ends of the piece are respectively connected with the bolt and the end cover; the compression spring is set on the fuse piece; the further improvement is that the cross section of the fireproof expansion sealing strip is L-shaped; the fire-facing panel and the back-fire panel are provided with a flame-retardant layer. The invention has good sealing and flame retardant effects, and the replacement of the fusing piece is fast and convenient.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a steel fireproof door. Background technique [0002] The steel fire door is a door with a certain fire resistance, which is made of steel materials to make the door frame and door panel, and is equipped with fireproof hardware accessories. When a fire breaks out in the current steel fireproof door, the door panel will be deformed after being burned for a certain period of time (because the flames go up, so the deformed part is generally on the top of the door panel), and the flame and thick smoke will pass through the door gap, making it difficult to block the fire. spread. Chinese patent authorization announcement number CN204060419U discloses a "steel fireproof door": including a door frame, a door panel hinged on the door frame through a hinge, and a lock pin structure for preventing deformation of the edge of the door panel. The fixed sleeve on the fire surface and close ...

AI Technical Summary

Problems solved by technology

When a fire breaks out, this kind of steel fire door will not deform the door panel, and can effectively prevent flames and thick smoke from passing through the door gap, but it has the following defects: the bottom of the fixed sleeve is closed, and it is time-consuming and laborious to replace the fuse at the bottom of the fixed sleeve

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