通風(fēng)管道可以讓建筑物室內(nèi)保持空氣流通，排放有害氣體，而在通風(fēng)管道加工設(shè)計過程中，涉及的考慮事項有很多，下面來講講通風(fēng)管道材料以及截面形狀的選擇內(nèi)容吧。
Ventilation ducts can keep the air in the building and discharge harmful gases. There are many considerations involved in the processing and design of ventilation ducts. Let's talk about the selection of ventilation duct materials and section shapes.
通風(fēng)管道材料的選擇：
Selection of ventilation duct materials:
通風(fēng)管道加工主要由鋼板、金屬軟管、塑料和橡膠軟管、纖維板、膠合板、石膏板、聚氯乙烯塑料板、磚和混凝土等制成。鋼板是通風(fēng)管道常用的材料，具有耐腐蝕、耐高溫的特點，便于制造和安裝。
Ventilation pipe processing is mainly made of steel plate, metal hose, plastic and rubber hose, fiberboard, plywood, gypsum board, PVC plastic board, brick and concrete. Steel plate is a commonly used material for ventilation pipes, which has the characteristics of corrosion resistance and high temperature resistance, and is convenient for manufacturing and installation.
一些通風(fēng)管道在技術(shù)上需要經(jīng)常移動，這需要柔性材料，如金屬軟管、塑料軟管和橡膠軟管。硬質(zhì)聚氯乙烯塑料板表面光滑，加工方便，但不耐高溫，適用于腐蝕性工業(yè)通風(fēng)和排氣系統(tǒng)。磚和混凝土制成的通風(fēng)管主要適用于與建筑物連接，阻力小，經(jīng)久耐用。總之，通風(fēng)管道的材料應(yīng)根據(jù)應(yīng)用條件綜合選擇。
Some ventilation ducts technically need to be moved frequently, which requires flexible materials, such as metal hoses, plastic hoses and rubber hoses. The surface of rigid PVC plastic plate is smooth and easy to process, but it is not resistant to high temperature. It is suitable for corrosive industrial ventilation and exhaust systems. The ventilation pipe made of brick and concrete is mainly suitable for connecting with buildings, with small resistance and durability. In a word, the material of ventilation duct shall be comprehensively selected according to the application conditions.
風(fēng)管加工時的截面形狀一般分為矩形和圓形。在相同橫截面積的情況下，圓形通風(fēng)管道不僅阻力小，而且強度高，節(jié)省了管道。對于圓形通風(fēng)管道，直徑越小，制造越容易，保溫越方便。
The cross-section shape of air duct is generally divided into rectangle and circle. In the case of the same cross-sectional area, the circular ventilation duct not only has small resistance, but also has high strength, which saves the pipe. For circular ventilation ducts, the smaller the diameter, the easier it is to manufacture and the more convenient it is to keep heat.
但是，矩形通風(fēng)管道的管件比圓形通風(fēng)管道的管件容易制作，布局也比圓形通風(fēng)管道簡單。在正常情況下，當通風(fēng)管的橫截面較小，管內(nèi)流速較高時，宜采用圓形通風(fēng)管。
However, the pipe fittings of rectangular ventilation duct are easier to make than those of circular ventilation duct, and the layout is also simpler than that of circular ventilation duct. Under normal circumstances, when the cross section of the ventilation pipe is small and the flow rate in the pipe is high, the circular ventilation pipe should be used.
山東通風(fēng)管道加工人員認為通風(fēng)管道截面較大時，應(yīng)采用矩形通風(fēng)管道，并能充分利用建筑空間。對于矩形通風(fēng)管道，寬高比越接近1越好，這樣不僅可以節(jié)省運行功率，還可以節(jié)省投資。
Shandong ventilation duct processors believe that rectangular ventilation ducts should be used when the cross-section of ventilation ducts is large, and the building space should be fully utilized. For rectangular ventilation ducts, the closer the width height ratio is to 1, the better. This can not only save operating power, but also save investment.
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