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再生水對園林升降式噴頭水力性能的影響?yīng)?/div>
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of Pop-up Sprinklers with Reclaimed Sewage Effluent
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    摘要:

    選取園林噴灌中常用的3種升降式旋轉(zhuǎn)噴頭：DPX-HP型噴頭、具有記憶功能的DPX-TS型噴頭和托羅V-1550型噴頭，分別在地下水和再生水條件下運行447h，測定運行前、后的流量-壓力關(guān)系、噴頭水量分布和轉(zhuǎn)動均勻性，并利用單噴頭水量分布資料模擬計算組合噴灌均勻系數(shù)，以評價再生水對升降式噴頭水力性能的影響。結(jié)果表明，再生水運行447h后噴頭流量降低3.4%~4.7%、射程降低2.7%~9.0%，而地下水分別降低了0.03%~0.09%和2.5%~3.9%，再生水降幅明顯大于地下水。再生水運行使噴頭各象限轉(zhuǎn)動時間的最大偏差率增加4.2%~4.4%，水質(zhì)變化對噴頭轉(zhuǎn)動均勻性影響不明顯。再生水運行不會對噴頭的均勻系數(shù)產(chǎn)生明顯影響，能夠滿足高灌水均勻度的要求。

    Abstract:

    Water distribution, discharge-pressure relation and rotation nonuniformity of pop-up sprinklers during application of reclaimed sewage effluent and groundwater were tested to investigate the effects of water quality on sprinkler performance. The overlapped sprinkler uniformity coefficients were also determined from the radial water distribution of an individual sprinkler. Three types of pop-up sprinklers, DPX-HP sprinkler, DPX-TS sprinkler (recordable angle adjusting) and Toro V-1550 sprinkler, were used and sprinkler performance were measured after the operation of 447h for both sewage effluent and groundwater application. A significant influence of water quality on sprinkler performance was found. Sewage effluent application resulted in 3.4%~4.7% and 2.7%~9.0% reduction in sprinkler discharge and coverage radius, respectively; while sprinklers applying groundwater produced a 0.03%~0.09% reduction in discharge and a 2.5%~3.9% reduction in radius. Sprinkler rotation nonuniformity, represented by a maximum rotation deviation, increased after a continuously operation of 447h, but no significant influence of water quality on the rotation nonuniformity was observed. The influence of water quality on Christiansen uniformity coefficient (CU) was also insignificant.

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栗巖峰,李久生,尹劍鋒.再生水對園林升降式噴頭水力性能的影響?yīng)琜J].農(nóng)業(yè)機(jī)械學(xué)報,2010,41(8):56-61. of Pop-up Sprinklers with Reclaimed Sewage Effluent[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(8):56-61.

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