High-strength fire-resistant flue duct is a new product that has obtained several national patents (patent number: ZL 201120072302.1; ZL 201020686210.8; ZL 201020686142.5). It is produced by mechanized assembly and assembly of new fire-resistant flue special fireproof boards. become. Its performance makes up for many defects of cement flues currently on the market, and it is a new type of flue that replaces cement prefabricated flues.
Features
In the past, flues were mostly prefabricated with sulfoaluminate cement sandwiched with alkali-resistant fiberglass mesh or ordinary Portland cement sandwiched with steel wire mesh and other reinforcing materials. Made into.
Since the national standards "Residential Building Code", "Building Design Fire Protection Code" and other mandatory provisions stipulate that the fire resistance limit of flue in residential buildings should not be less than 1.00h, due to the difficulty of cement prefabricated flue It meets the requirement that the fire resistance limit is not less than 1.0h, and its flexible impact resistance is difficult to meet the requirements of the national flue standard. [1] In order to prevent the accumulation of grease in residential exhaust ducts from becoming a fire hazard over time, most exhaust ducts are Applying new patented technology, the combined transformer-type high-strength fire-resistant flue duct (Patent No.: ZL201120072302.1) [1] is produced by mechanized assembly of inorganic refractory flue plates, and a variable pressure air extraction is installed inside the flue. components, and must be type-inspected in accordance with the national standard "Fire Resistance Test Methods for Ventilation Ducts GB/T17428-2009", and the fire resistance limit needs to be more than 1.0h.
The fire resistance limit of the combined transformer-type high-strength fire-resistant exhaust duct is ≥1.0h, the maximum bearing capacity reaches 190KN (the national standard is ≥90KN), the soft impact resistance far exceeds the national standard, and it is lightweight and Crack-resistant, strong tensile strength, easy to transport and install. The interior is equipped with a patented variable pressure component (patent number: ZL 201020686210.8 and ZL 201020686142.5) developed by Jiangsu Ziwei Building Technology Research Institute based on Bernoulli's theorem to extract air and accelerate air flow, so that the flue gas can achieve dynamic and static pressure control at a specific position. The conversion makes the exhaust outlet of the kitchen or bathroom without the smoke exhaust machine in a negative pressure state, forming a suction force, thereby eliminating the vortex and air stagnation curtain, and solving the phenomenon of gas and odor in the exhaust duct. The combined transformer-type high-strength fire-resistant flue duct has the characteristics of light weight, high strength, no deformation, good fire resistance, strong flexible impact resistance, easy installation, good sound insulation performance, and not easy to be damaged. It is widely used in kitchen smoke exhaust and bathroom exhaust in residential buildings and public buildings.