The quality of the purification air duct is directly related to whether the system meets the planning parameters and normal operation requirements. Its manufacturing generally adopts two methods: centralized factory manufacturing and on-site manufacturing. Regardless of the manufacturing method used, it is necessary to ensure the cleanliness and closure of the manufacturing site. It is recommended to use cement or metal steel plates laid on the ground, with an area not less than 100m?, And meet the lighting and lighting conditions, the completed purified air ducts must be stacked and guarded; If on-site prefabrication is used, it is necessary to ensure that the completed air duct can be transported to the construction site in a timely manner, and to minimize the interval between air duct handling, so as to avoid pollution to the air duct during transportation.
2. Planning device for air ducts
Selection of duct plate thickness
The thickness of the plate has a significant impact on the quality of the air duct. In order to ensure the weight of the air duct, smaller plate thickness air ducts should be selected. However, the selection process is still related to the scale and pressure level of the air duct. In China, the majority of metal air ducts are made of hot-dip galvanized steel plates and steel strips. The base material is cold-rolled low-carbon structural steel plates, with tensile strength>270, elongation>24%, and allowable thickness difference within the range of d=0.6-1.2mm (± 0.07-0.13mm). Due to the certain gap between China's industrial technology and testing technology and foreign countries, the thickness of air duct plates used domestically is 20% larger than foreign standards. However, with the continuous development of China's economy and technology, many domestic manufacturers have been able to produce uniformly thick plates. Therefore, when selecting small plate thicknesses for air ducts, it is necessary to select steel plates with small error sizes to avoid wasting the steel.
Furthermore, from a planning perspective, it is worth noting that a system can have several duct plate thicknesses corresponding to different static pressure levels together. At the end of a positive pressure air duct system or the front end of a negative pressure air duct, low pressure air ducts can often be used, while medium pressure or high pressure air ducts can be used near the fan.
Horizontal connection of air ducts
Horizontal connection is not only a technique for continuous duct length, but also plays a role in enhancing stiffness and maintaining the horizontal scale of the duct. The usual method of horizontal connection is angle steel flange connection, which depends on the wall thickness, as well as the type of connection and the reinforcement method of the plate wall. The flange free connection in horizontal connection is widely used in low and medium scale (rectangular long side less than 1.6m) air ducts.
For more questions or detailed information about the processing of ventilation ducts in Shandong, please visit our company's website: http://www.jnqsg.com There will be a lot of content on the website for reference only