In ventilation engineering, the production and installation of ventilation ducts are important links. What are the specific requirements and standards for the production and installation methods? This is what all individuals or enterprises that process ventilation ducts and undertake ventilation projects should study and study. The following ventilation ducts The manufacturer will introduce to you the specifications and common problems of fabric duct ventilation duct devices. Standard rules for ventilation duct equipment 1. The installation of the fan should comply with the following rules (1) During the test run of the fan, the rotation direction of the impeller is correct. After running for not less than 2H, the temperature rise of the sliding bearing does not exceed 35 degrees, and the temperature does not exceed 35 degrees. 70 degrees; the temperature rise of the rolling bearing does not exceed 40 degrees, and the temperature does not exceed 80 degrees. (2) The centrifugal fan is in close contact with the shock-absorbing pedestal, the bolts are tightened, and there is an anti-loosening device. (3) When the shock-absorbing hanger device is used for the pipeline fan, the fan and the shock-absorbing hanger are closely connected and firm; when the support-trailer device is used, the fan is closely connected with the shock absorber, the bracket and the bracket, which is stable and reliable. 2. The installation of filters, paper dust collectors and filter absorbers should comply with the following rules (1) The models, specifications and additional air volume of various equipment must meet the design requirements. (2) The installation direction of various equipment must be correct. (3) When the equipment is connected to the pipeline, the integral rubber hose joint should be selected, and there should be no air leakage; the fixing bracket should be flat and stable. (4) The device of the filter should be fixed and strong, and there is no significant gap between the filter and the structure, and between the structure and the maintenance structure. (5) The device of paper dust collector and filter should be fixed and firm, with accurate orientation and tight connection. 3. The installation of the muffler should comply with the following rules (1) The structure of the muffler must be firm, the size of the partition of the resonant cavity is close and correct, and the shell at the joint of the partition and the wall plate is tight and leak-proof. (2) The direction of the muffler device must be correct, and the support (hanger) frame should be set up separately. (3) The rear end of the muffler sheet must be firm and the distance between the sheets is uniform. (4) The sound-absorbing sheet material is firmly bonded and flat, and the bulk material is filled evenly without significant sinking. (5) The muffler face material is spliced u200bu200balong the airflow direction without damage; the perforated plate has no burrs, and the hole spacing is evenly arranged. 4. The airtight valve device should meet the following rules (1) It should be checked before installation, and its airtight function should meet the technical requirements of the product. (2) When installed, the direction of the arrow mark on the valve is the same as the direction of the shock wave. (3) The orientation of the switch indicator light should be the same as the actual switch orientation of the valve plate, and the operating orientation of the opening and closing handle should be accurate. (4) The valve is fixed with hooks or brackets. 5. The installation of the pressure measuring device should comply with the following rules (1) The connection of the pressure measuring pipe should be welded, and it should be fully welded and not leaking. (2) The connection between pipeline valves and accessories should be tight. (3) The pressure measuring plate should be treated with anti-corrosion and fixed with expansion screws. (4) The pressure measuring instrument should be placed horizontally.
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