Fire-retardant heat preservation external wall

Abstract

The invention discloses a fire-retardant heat preservation external wall and belongs to the technical field of buildings. The fire-retardant heat preservation external wall comprises a wall body. A heat preservation layer, a middle layer and a thermal insulation layer are arranged on the outer side of the wall body in sequence. The heat preservation layer is formed through mortise-tenon joint of a plurality of heat preservation plates. The heat preservation plates are connected with the wall body through expansion bolts. The thermal insulation layer is formed through mortise-tenon joint of a plurality of thermal insulation plates. The middle layer comprises a plurality of tin pieces, and the space between every two adjacent tin pieces is filled with an expansion block. One end of each tin piece is welded to the corresponding thermal insulation plate, and the other end of each tin piece is in threaded connection with the corresponding heat preservation plate. According to the scheme, through the arrangement of the middle layer, the heat preservation layer connected with the wall body is separated from the outside thermal insulation layer, when the thermal insulation layer burns in case of a fire, the state of matter in the middle layer is changed, separation of the heat preservation layer from the thermal insulation layer is achieved automatically, therefore the fire is prevented from spreading to the heat preservation layer fundamentally, and the purpose of thorough control over the fire is achieved.

Description

technical field [0001] The invention relates to the technical field of buildings, in particular to a building exterior wall structure. Background technique [0002] With the rapid advancement of building energy conservation in my country, building exterior wall insulation materials, especially EPS (polystyrene foam), PS (extruded polystyrene foam) and PU (polyurethane foam), have been widely used. They are all flammable organic thermal insulation materials. The biggest advantage of this kind of material is light weight, heat preservation, and good heat insulation; the biggest defect is poor fire safety, easy aging, and easy combustion. If these new building energy-saving materials have not been modified by the chemical structure of flame retardant and smoke reduction, if they are simply added with flame retardants, there will be serious fire hazards, leading to frequent building fire accidents, CCTV fires sounded the alarm to the whole country, Therefore, the research and la...

AI Technical Summary

Problems solved by technology

The above scheme effectively divides the entire external wall thermal insulation system, and fills the fire-retardant material in the inner and outer joint filler layers to achieve the purpose of slowing down the spread of fire. Although this scheme can to a certain extent Slow down the speed of fire spread, but still can not fundamentally solve the purpose of stopping the fire

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