| 引用本文: | 郭 庆,李田田,杨建飞.不同类型滴头在黄河水滴灌条件下的堵塞特征研究[J].灌溉排水学报,2022,41(12):52-58. |
| GUO Qing,LI Tiantian,YANG Jianfei.不同类型滴头在黄河水滴灌条件下的堵塞特征研究[J].灌溉排水学报,2022,41(12):52-58. |
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| 摘要: |
| 【目的】探明黄河水滴灌条件下滴头类型和结构对滴头堵塞特性的影响，为引黄灌区滴灌系统滴头选型提供科学依据。【方法】选用不同进水口结构（有凸台、无凸台）和不同类型（非补偿片式、非补偿圆柱式和补偿圆柱式）的6种迷宫流道滴头进行短周期间歇性灌水试验，对比分析6种滴头的流量变化规律和堵塞状况。【结果】滴头类型和进水口结构对滴头堵塞具有显著影响，不同类型滴头在灌溉过程中的相对流量均发生了不同程度下降，其中无凸台结构的补偿圆柱式滴头E4流量下降速率最快，堵塞程度最严重，有凸台结构的非补偿圆柱式滴头E6流量下降速率最慢，滴头堵塞程度最轻；滴头进水口凸台结构可有效减缓泥沙颗粒在流道入口处的沉积，减小滴头流量下降速率，降低滴头堵塞率；与无凸台结构滴头中抗堵塞性最优的E5滴头相比，有凸台结构的E6滴头相对流量提升了14.81%，滴头堵塞率降低了46.63%。【结论】黄河水滴灌时选择具有进水凸台结构的非补偿圆柱式滴头可有效提高滴灌系统的使用寿命。 |
| 关键词: 黄河水；滴灌；堵塞；进水口结构 |
| DOI：10.13522/j.cnki.ggps.2022270 |
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| Clogging of Different Emitters in Using Yellow River Water for Dripping Irrigation |
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GUO Qing, LI Tiantian, YANG Jianfei
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1. Yangling Vocational and Technical College, Yangling 712100, China;
2. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China;
3. Agriculture and Rural Affairs Bureau of Zhouzhi County, Xi’an 710400, China
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| Abstract: |
| 【Objective】 Yellow River is muddy and dripping irrigation using it could clog the emitters. The purpose of this paper is to study experimentally how a change in interior structure of the emitter could alleviate the clogging. 【Method】We investigated six labyrinth channel emitters with different inlet structures and types in the experiment; water flow and occurrence of clogging in each of them were compared and analyzed.【Result】Emitter type and its interior structure have a significant impact on emitter clogging (P<0.05). Among the six emitters we studied (E1~E6), the compensated cylindrical emitter (E4) without the interior ] boss structure has the fastest flow decline rate and the most serious clogging, while the non-compensated cylindrical emitter (E6) with an interior boss structure has the slowest flow decline rate and least clogging. The interior boss structure can effectively slow down deposition of sediment particles at the inlet of the channel, reducing flow decline rate and clogging as a result. Compared with E5 emitter that has the best anti-clogging for those without the interior boss structure, the flow in E6 emitter with the interior boss structure is increased by 14.81%, and the clogging rate is reduced by 46.63%. 【Conclusion】 The non-compensated cylindrical emitter with an intake interior boss structure is most effective for reducing emitter clogging in drip irrigation using Yellow River water. |
| Key words: yellow river water; drip irrigation; plugging; inlet structure |
