來源： 日期：2022-11-25 發布人：jntfgd
The air duct is mainly used in industrial and architectural projects, and the application fields mainly include: electronic industry dust-free workshop purification system, pharmaceutical and food aseptic workshop purification system, central air conditioning system of hotels, shopping malls, hospitals, factories and office buildings, exhaust ducts for industrial pollution control such as dust removal, smoke exhaust, oil suction, air supply ducts for industrial environment or post comfort, gas drainage system for coal mine gas drainage Air supply and return system for environmental control of coal mines... etc; PS: It is often developed into a special route for escape and sneak in by film, television and animation. Material grade
The ventilation pipes are divided according to their purposes
1. Air duct for purification air conditioning system: galvanized sheet, stainless steel; (FRP and composite materials that may cause dust source pollution during use are prohibited) 2. Air duct for central air-conditioning system: galvanized sheet, color steel insulation board; (FRP and composite materials can be used) 3. Air duct for environmental control system: galvanized sheet, stainless steel; (Plastic, glass fiber reinforced plastic and composite materials can be used) 4. Air duct for industrial ventilation system: steel plate and galvanized sheet; (Libo ventilation pipe. Plastic, glass fiber reinforced plastic and composite materials can be used) Note: glass fiber reinforced plastic air pipe can be divided into organic and inorganic materials, and organic materials are prohibited if there are fire protection requirements according to the design specifications; 5. Air duct for special occasions: mining adhesive coated air duct, mining plastic air duct; (Flame retardant and anti-static mining safety characteristics are required)
Air duct construction
1) For more complex civil buildings, in the design phase, all types of work (HVAC, water supply and drainage, power supply and lighting and architecture) should first negotiate space separation and determine the elevation range of each type of pipe. In general, you should not exceed the limits set for yourself. In case of pipeline section crossing the boundary, it shall negotiate with other projects. 2) The principle to solve the collision and coordination of various ventilation pipes is generally: "small pipes give way to large ones, and pressure gives way to no pressure". For example, if the water pipe collides with the air pipe, the water pipe should turn. If the cold and hot water pipes collide with the sewer pipe, the cold and hot water pipes shall be changed. 3) Before construction, the engineer in charge of equipment shall draw the pipelines and single lines of each type of work on a plan. One color pen for each type of pipe. The elevation of each intersection shall be integrated to see if there is any contradiction, and the problem shall be solved before installation. 4) In order to reduce investment, save space and reduce floor height, some pipes without slope requirements can be laid through beams (such as water supply pipes, fire sprinkler main pipes, etc.).
Inorganic glass fiber reinforced plastic for ventilation duct
Inorganic glass fiber reinforced plastic ventilation pipe (also known as glass fiber magnesium oxychloride cement ventilation pipe) is a pipe made of magnesium oxychloride cement as the binder, alkali glass fiber as the reinforcement, filler materials and modifiers. It has the characteristics of incombustible, Class A incombustible material, corrosion resistance, high strength and light weight. In the ventilation of construction projects, underground projects and industrial plants, it has completely replaced the non flame resistant PMMA ventilation pipe, and gradually replaced the galvanized iron ventilation pipe with poor anti-corrosion performance. Especially in the underground projects with high humidity and the areas south of the Yangtze River, its advantages are more significant. Through the research of magnesium oxychloride cementitious materials and the detection of products, it is found that there are still some quality problems in the production and engineering application of inorganic FRP ventilation pipes. Some quality problems seriously affect the service life of the project, which should be paid enough attention to.