Cast-in-place hollow floor with hidden protecting fume exhaust ductwork

Abstract

The invention relates to a cast-in-place hollow floor with a hidden protecting fume exhaust ductwork, in particular to a system for indoor ventilation by utilizing a building hollow floor. The proposal adopts a cast-in-place hollow floor built by hollow thin wall cases and utilizes a communicated pipeline to communicate each hollow thin wall case in the floor so as to form a hidden protecting fume exhaust channel; the lower part of a indoor thin wall case of the building is provided with an air outlet which is communicated with the hidden protecting fume exhaust channel; by utilizing an exhaust opening of the hidden protecting fume exhaust channel, the indoor fume and gas can be exhausted outside, and the outdoor fresh air also can be introduced into the room; and by additionally utilizing a smoke extractor, the exhausting effect can be increased or strengthened. The proposal solves the problem that an air conduit is installed additionally in the room, reduces the cost, enlarges the using space of the room, and increases a solution when a fire occurs.

Description

technical field [0001] The invention relates to a fire-fighting smoke exhaust and ventilation system for a building, in particular to a device for exhausting smoke and ventilation by using a thin-walled box inside the hollow floor of a building. Background technique [0002] At present, basement parking lots, underground civil air defense rooms, office buildings, large shopping malls and other buildings generally use a separate smoke prevention and exhaust system device in the fixed fire protection facilities, and use the independent special anti-smoke system installed under the floor. Composed of exhaust pipes and anti-exhaust machines, a large amount of pipes need to be installed, and the installed galvanized iron anti-exhaust pipes are prone to rust and corrosion; the installed plexiglass anti-exhaust pipes solve the problem of rust, but their own fire resistance is poor; The installed inorganic glass fiber reinforced plastic anti-smoke exhaust pipe solves the problem of ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high cost and low floor space of the independent fire-fighting and smoke-exhausting and ventilation system for buildings, the applicant made further improvements on the basis of the previous proposal, and proposed a high-efficiency, low-cost, safe, reliable, fast Convenience, improve the use of space, make full use of the thin-walled box that forms the hollow floor, and combine it into a concealed smoke prevention and exhaust pipeline system through different methods of connection. This scheme adopts the following method: a cast-in-place The hollow floor, the dark anti-smoke exhaust pipe is located in the hollow floor, and the hollow floor includes thin-walled boxes, main beams between the thin-walled boxes, rib beams, and upper flanges above the thin-walled boxes plate, the lower flange plate below, at least two communication holes are opened on the side of the thin-walled box, and each thin-walled box is formed in the floor by inserting a connecting channel into the communication holes on both sides The improvement of the dark anti-smoke exhaust duct is that the dark anti-smoke exhaust duct includes an air suction port and an air exhaust port, and the air suction port is directly opened on the lower flange plate of the building floor and communicates with the thin-walled box in the floor , the smoke exhaust machine that controls the gas circulation in the dark smoke exhaust pipe is installed on the floor floor or the wall

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