论文部分内容阅读
三、管路器件园林草坪喷灌所用的管路和农用喷灌系统相同,但管路器件要比农用系统考虑得更周到、严密些。因此,管路器件种类较多,且专门设计制造。 (一)自动排气阀园林草坪的地形往往是复杂的,高低错落才能显出自然景色美,而在这些地方规划喷灌系统,不可避免地要使管道布设随高就低。而高处的管路在通水时容易形成气窝,排不出去,不仅影响过流能力,引起脉动压
Third, pipe fittings Garden lawn sprinkler irrigation pipe and irrigation systems used in the same, but the pipeline than the agricultural system to consider more thoughtful, more closely. Therefore, the pipeline more types of devices, and specially designed and manufactured. (A) automatic exhaust valve Garden lawn topography is often complicated, the level of the patchwork to show the beauty of natural beauty, and planning sprinkler irrigation systems in these places, inevitably to make the pipeline layout with high on the low. The height of the pipeline in the water easily formed gas pockets, can not go out, not only affect the flow capacity, causing pulsating pressure