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.对于矩形风管的直管段，无论是用同一块板连接还是用几块板拼接，表面应光滑，角线应平直。组装前，应清除板材切割面上的切割粉末、灰尘和杂物。

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.管段组合后，外部接头应修整45度，板的外表面应用铝箔带密封。每边宽度不小于20毫米，用角尺和钢带检查并调整垂直度和角线，偏差，符合规范要求。

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.

济南通风管道

Jinan ventilation pipe

3.风管的圆弧面或折线面下料弯曲完成后，应与平板预组装，然后涂上胶粘剂，以保证管件的几何形状、尺寸和压痕。

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.连接和组合后的管段应垂直放置，直到它们在移动前成型。

4. The connected and combined pipe sections shall be placed vertically until they are formed before moving.

5.铝箔复合保温管用胶粘剂应为板材制造商认可的专用胶粘剂。如果单独购买粘合剂，济南通风管道需要进行连接效果对比测试，并且粘合剂要经过监理和板制造商的检查和批准后才能使用。

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.

对管道内表面污垢进行高压水射流剥离清洗。济南通风管道主要用于短距离管道，并且管道直径要求大于50cm以上。该技术具有速度快，成本低等特点。它们都有各自的功能。

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.

通风管道设备一般用于通风、环境保护系统的各个领域，随着技术的发展，通风管道设备的风格也有空间的选择，常见的圆，矩形，现在仍然螺旋形状等

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