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在农村小型水电站里,当利用水头超过6米时,往往就要利用压力水管把水库或压力前池中的水流引入水轮机。压力水管按材料可分为,钢管、钢筋混凝土管、铸铁管、木管等几种。其中木质压力水管因为制作简单成本低,而且保温性能较强,管里的水不易结冻,木料在温度变化时伸缩较小,不需设置伸缩接头,所以在农村小型水电站中,木质压力水管比其它类水管应用的普遍些。木质压力水管如果设计及安装得好,维护得法,可以使用20年以上。但是如果安装或管理得不好,使用一、二年就可能发生严重的漏水现象,以及钢箍拉断,管板破裂等事故。因
In small hydropower stations in rural areas, when the head of water is used more than 6 meters, pressure water pipes are often used to introduce the water in the reservoir or the pressure front pool into the turbine. Pressure pipe according to the material can be divided into, steel pipe, reinforced concrete pipe, cast iron pipe, wood and other several. Among them, the wooden pressure water pipe has the advantages of simple production and low cost, and strong heat insulation performance. The water in the pipe is not easy to freeze, and the expansion and contraction of the wood when the temperature changes is small, and the expansion joint is not needed. Therefore, in the rural small-scale hydropower station, Other types of water pipes are more common. Wood pressure hose if designed and installed well, well-maintained, you can use more than 20 years. However, if the installation or management is not good, the use of one or two years may occur serious leakage phenomenon, as well as the steel hoist off, tube sheet cracking and other accidents. because