When the air supply outlet is opened, the air outlet shall be removed. The sampling shall collect all dust accumulated on the surface of the duct in a certain area and take it out of the duct in good condition. The inspection equipment, inspection and analysis method of dust accumulation in ventilation duct are the same as those after cleaning. Detection method of total number of microorganisms on the inner surface of ventilation duct and bacteria on the inner surface of air duct in central air conditioning ventilation system
1. For the straight section of rectangular duct, whether it is connected by the same plate or spliced by several plates, the surface shall be smooth and the corner line shall be straight. Before assembly, the cutting powder, dust and debris on the cutting surface of the plate shall be removed.
2. After the pipe section is assembled, the external joint shall be trimmed for 45 degrees, and the outer surface of the plate shall be sealed with aluminum foil. The width of each side shall not be less than 20 mm. The perpendicularity and angle line shall be checked and adjusted with angle ruler and steel strip, and the deviation shall meet the specification requirements.
Jinan ventilation pipe
3. After the arc surface or broken line surface of the air duct is cut and bent, it shall be pre assembled with the flat plate, and then coated with adhesive to ensure the geometric shape, size and indentation of the pipe.
4. The connected and combined pipe sections shall be placed vertically until they are formed before moving.
5. The adhesive for aluminum foil composite insulation pipe shall be the special adhesive approved by the plate manufacturer. If the brand adhesive is purchased separately, Jinan ventilation duct needs to be tested for connection effect, and the adhesive can only be used after being inspected and approved by the supervisor and the board manufacturer.
The inner surface of the pipe was cleaned by high pressure water jet. Jinan ventilation pipe is mainly used for short distance pipe, and the pipe diameter is required to be more than 50cm. This technology has the characteristics of high speed and low cost. They all have their own functions.
Ventilation duct equipment is generally used in various fields of ventilation and environmental protection system. With the development of technology, the style of ventilation duct equipment also has the choice of space, such as circle, rectangle, spiral shape and so on