High-strength splicing fireproof exhaust gas flue

Abstract

The invention provides a high-strength splicing fireproof exhaust gas flue. fireproof plates are connected, spliced and encircled into a pipeline structure, supporting rings are respectively fixed at a certain interval at the inner side and / or the outer side of the exhaust gas flue from top to bottom in the direction of a cross section, and reinforcing ribs, bearing supporting structures and the like are reasonably designed. And therefore, the standardized mass production can be realized conveniently, the quality of the gas flue is ensured fully, the weight of the gas flue is lowered, and thetransportation and the mounting become convenient. The invention effectively solves the problems of gas intrusion and odor tainting by arranging a siphon negative-pressure check valve at the air inlet of the gas flue and fully ensures the mounting firmness degree and ensures the effective closing function of a valve plate to a gas opening by further adopting an internal fixed fireproof valve.

Description

technical field [0001] The invention relates to the structure design of building pipes, in particular to a building, especially a public smoke exhaust duct structure of a residence or an apartment building. Background technique [0002] In residential buildings, apartment buildings and other buildings, it is necessary to design public smoke exhaust ducts. The range hood pipes and bathroom exhaust pipes of each household are connected with the public smoke exhaust ducts through connecting pipes, and the smoke is passed through the public exhaust ducts. The exhaust gas channel is exhausted from the exhaust port on the top. [0003] The public smoke exhaust ducts currently in use are basically prefabricated with ordinary cement materials, poured on site or bricked and cut on site; At the gas port, the existing structure usually sets a one-way valve on the outside of the flue gas inlet to prevent the flue gas from being poured back into the flue gas channel and prevent odors; ...

AI Technical Summary

Problems solved by technology

[0004] For flue gas duct structures that are prefabricated with ordinary cement materials, poured on site or bricked and cut on site, the production process is difficult to meet the specifications and standards, and the product quality is difficult to effectively control. They are basically made by hand, and the wall thickness of the flue gas duct cannot be guaranteed to be consistent. , it is not convenient to form mass production; the public smoke exhaust duct is not only bulky but also not strong, which brings inconvenience to handling and installation; the inner wall of the flue gas duct is rough, and after a long time of use, oil stains are deposited on the inner wall, which is easy to cause a fire

[0005] The check valve structure on the existing exhaust gas channel to prevent the backflow of smoke in the flue gas channel and to prevent the accumulation of odors will still prevent the leakage of gas in the flue gas channel due to the accumulation of oil at the check valve after a certain period of time. Phenomenon of smoke backflow and odor

[0006] However, the fire damper of the existing structure is prone to the phenomenon that the installation position is not firm and the closing is not tight during fire prevention, which affects the fire prevention effect

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