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通风管的形式按通风管横截面的形状分,可以制成园形、半园形、拱形、长方形,也可以制成倒置 V 形或 V 形。冲孔的活动地饭在通风中很少见,因为这样做费用较高,安装也麻烦。虽然通风管在运行过程中存在着一些空气流不匀的现象,但是价格比较低廉,所以能被广泛采用。冲孔通风管,即在通风管表面开有均匀的孔以利流动空气能从通风管表面均匀排出,冲孔面积至少应等于风管面积的10%,而且每个孔又不能让粮粒通过,而只能让气流通过。例如,直径为3/32时的园孔和宽度为5/64时的槽孔能够阻档正常尺寸的小麦粒穿过。玉米,大豆这样的
Ventilation duct in the form of ventilation tube cross-sectional shape, can be made into circular, semi-circular, arched, rectangular, can also be made inverted V-shaped or V-shaped. Punching the activities of rice is very rare in the ventilation, because it costs more, the installation is also troublesome. Although the air duct in operation there are some air flow uneven phenomenon, but the price is relatively low, it can be widely used. Perforated ventilation pipe, that is, the surface of the ventilation pipe is open with a uniform hole to facilitate the flow of air from the ventilation surface of the pipe evenly, the punching area should be at least equal to 10% of the duct area, and each hole can not let grain through , But only allows the air to pass. For example, 3/4 in. Diameter holes and 5/64 in. Width slots can block normal size wheat grains from passing through. Corn, soybeans like this