General ventilation duct installation procedures

General ventilation duct installation procedures: (1) Air duct assembly: When the duct is short, it can be assembled on the ground at one time. When the duct is longer, it can be assembled in sections on the ground depending on the installation site. When assembling, adjust the center and levelness of the air duct as much as possible to avoid twisting or wavy up and down of the air duct, and the left and right swinging dragons. Each section of the air duct should not exceed 10m. When assembling, the gasket should be leveled and the flange bolts should be evenly tightened. , The nut caps all face the same direction. (2) The air duct is in place: Check the water level and elevation of all supports and the firmness of the supports before the air duct is in place. Direct and spreader methods can be used to place the air duct. For wind pipes with small cross-sections and low positions, manual positioning can be used, and only simple scaffolding is required. When the cross section of the wind pipe is large and the pipe section is long, it can be hoisted by means of pulleys, inverted chains, large ropes, etc. Century Star introduced that in order to facilitate the positioning of the air duct, the air duct is usually hung on a scaffold and then lifted on the air duct support. The scaffold should be erected along the length of the air duct, and the height and position should be suitable for the construction operation. The hoisting sequence should be dry pipe first, then support and riser. When hoisting, the lifting points should be firm and the two lifting points should be evenly stressed. The vertical air duct can be positioned manually and with large ropes. Adjust the air duct to ensure the verticality requirements. (3) Straightening of the air duct: the air duct in place on the bracket should be adjusted to the right position, and the air duct should be adjusted horizontally and vertically, and then fixed according to the requirements of the atlas. The quality of the Jiutian brand series fiber fabric duct is only 1/300 of the composite duct without any reinforcement measures. The most commonly used material weighs about 80-220 grams per square meter. The load on the ceiling or bearing wall is minimal, and the installation is extremely simple. , The general engineering of the fabric cloth duct can even be installed independently by a single person. Because the fiber fabric duct is suspended by steel ropes, it has low requirements on the structure of the building.

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