The most basic knowledge of ventilation pipes! Hurry up and collect it ~

"No matter what career you are engaged in in in the future and what kind of ambition you have, you must pay attention to strengthening the study of basic knowledge, laying a solid foundation and cultivating innovative ability go hand in hand. The tree is high in thousands of feet, but the roots are still there. If you lay a solid foundation, you can bypass analogy in the future, and you can write wonderful things in every line. "

Recently, at the just-concluded two sessions, Premier Li Keqiang sent a heartfelt message to young students. After listening carefully to the prime minister's inculcation, we have a direction and goal in addition to being moved. Young people need to lay a solid foundation and be pragmatic and innovative in order to take a good career path.

Today, I have prepared the most basic knowledge of ventilation pipes for everyone, so start collecting them quickly ~

Ventilation duct? The calculation methods commonly used in the design of air ducts and piping components are as follows:

1

? The installation of air duct shall be calculated according to different specifications in the construction drawing, and the area occupied by inspection holes, measuring holes, air supply openings and air suction openings shall not be deducted. When calculating the length of air duct, the length of the center line in the construction drawing shall prevail (the main pipe and branch pipe are divided by the intersection of their center lines), including the length of elbow, tee, reducer, Tianyuan and other pipe fittings, but excluding the length of canvas, air valve, muffler and equipment. The diameter and circumference should be enlarged according to the dimensions shown in the drawing. When quoting, the quota has included the loss, so the calculation result does not need to be multiplied by the loss coefficient.

2

Steel ventilation pipes, purification ventilation pipes and composite air ducts (glass fiber board and incombustible inorganic composite air duct) are included in the quotation quota, and flanges, reinforcing frames and hangers are not calculated separately. However, it does not include the landing bracket passing through the air duct, so the weight of the landing bracket passing through the air duct should be calculated according to the drawings and specifications.

three

? The bite connection quota of stainless steel ventilation pipes, aluminum ventilation pipes and air ducts includes pipe fittings and flanges, but does not include hangers. The welding connection in the quota only includes pipe fittings, but does not include flanges and hangers. The unit of measurement is "kg", so the weight of flange and hanger is calculated according to the design instructions or specifications according to the connection mode of air duct.

(Refer to the settlement data of existing projects: the content of flange (stainless steel angle iron 3#) is estimated to be 0.9 kg/m2; The content of hanger (stainless steel angle iron 4# and stainless steel channel steel 6#) is estimated as1.5 kg/m2; If other projects have similar projects, please provide data in time so as to correct them in time. )

four

Soft connection of pipeline:

(1) Canvas interface, calculated as "square meters" according to the dimensions shown in the drawings, with a general width of 250mm, specifically considering the field production experience;

(2) The hose is calculated in meters according to the drawing size.

five

For duct guide vanes, the number of elbows shall be calculated according to duct specifications, and the "area" of guide vanes shall be calculated according to the following table.

six

The tuyere air valve shall be measured in units of "one" according to different types (fire valve, butterfly valve, split multi-leaf valve, diffuser, shutter, etc.). ) and different specifications (calculated by finished products).

seven

Mufflers, anechoic static pressure boxes and static pressure boxes shall be measured in units of "Taiwan" according to different specifications (calculated by finished products). Except for design requirements, they shall be calculated in terms of "square meters" (expanded six zones) during field manufacturing.

eight

Insect-proof nets are calculated by "pieces" or "square meters", and the group price personnel can convert them according to their own needs.

nine

Design Description: If air duct inspection holes and air duct measuring holes are needed, the inspection holes shall be converted according to the following table and calculated by weight, and the measuring holes shall be "one" according to their models.

10

When the wall bushing is 2mm thick steel plate or other thickness (according to the design drawings), it shall be calculated as "area".