The production of standard ventilation ducts is very critical, and the solution of each key point is a hazardous application, so pay attention to the solution. Below is a brief summary of the solution to each level, let's discuss it together. 1. Production of air duct section. Note the hole in the position Note the hole in the corner position. Mainly mechanical seal, supplemented by sealant treatment. After each section of pipeline is processed and formed, it needs to be checked for quality. The strength and sealing performance of angle iron flanges are much higher than ordinary plate flanges. In the variable air system, angle iron flanges are mainly used. 2. Production of duct elbows. The location of duct elbows should be set as standard, especially large elbows, which can affect airflow and cause localized noise. When setting the guide vane, attention should be paid to the reasonable position and number of pieces. In the variable air volume system, the air volume is changed according to the terminal demand. Because the internal flow and flow will vary, proper elbow placement will help reduce local resistance. 3. Air duct flange production. Since the air duct is connected by steel plate flanges, large-sized tees, bends, etc. need to be made of steel plates. However, the position of the steel plate flange is strictly not allowed to splicing. Its strength can not meet the requirements, it must be galvanized iron sheet with gabled steel ears, or deal with according to the requirements of setting revision and specification. In the variable air volume system, due to the stable static pressure condition of the pipeline, the requirements for strength, strength and sealing performance are higher. 4. Production of three air ducts: In the variable air volume system, since the air volume on both sides of the tee will change under different conditions, and the partition or inverted plate will seriously restrict the distribution of the air volume, the tee position cannot be equipped with a guide plate or middle Reinforced partitions. However, if the strength of the part is to meet the design and specification requirements, angle steel flanges or reinforcement should be applied according to a design and specification. 5. Ventilation duct branch operation: In the ventilation duct system software (whether it is wind speed or wind speed change), the elbow and the three-way part cannot be immediately separated from the branch pipe, which will cause vortex and cause great frictional resistance. The wind of each branch pipe cannot be adjusted, causing some noise. The above five aspects need to be paid attention to when making air ducts. Each aspect is summarized in detail. Therefore, everyone should pay attention to the corresponding treatment in the subsequent production, and must be carried out in a standardized manner to ensure the subsequent application effect.
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