| 引用本文: | 郑 瑞,段福义,李金山.地埋式伸缩喷头水力性能试验研究[J].灌溉排水学报,2025,44(4):72-81. |
| ZHENG Rui,DUAN Fuyi,LI Jinshan.地埋式伸缩喷头水力性能试验研究[J].灌溉排水学报,2025,44(4):72-81. |
|
| 摘要: |
| 【目的】为解决当前地埋式伸缩喷头因参数选择不当而导致喷灌不均匀的问题。【方法】针对市面上应用较广的3种地埋式伸缩喷头，设置了正方形和正三角形2种布置方式，模拟了喷头在不同压力和组合间距下的水量分布情况，计算喷头喷灌均匀系数CU和分布均匀系数DU，综合考虑射程、平均喷灌强度和均匀度等评价指标，从而确定3种喷头最佳的运行参数。【结果】①工作压力为0.15~0.30 MPa、组合间距在1.0R~1.4R时，喷灌均匀系数为0.51~0.87；在低压范围内，工作压力对喷灌均匀系数和分布均匀系数的影响较明显。②喷头的流量随着工作压力的增大而增大；转速随着工作压力的增大而增加，但增幅逐渐变小。③3种地埋式伸缩喷头在组合布置方式和水力性能表现上存在差异，a喷头和c喷头在三角形组合布置方式的水力性能优于正方形布置方式，而b喷头呈相反的情况，这表明不同喷头的自身特性对布置方式的适应性有所不同。【结论】综合喷灌质量和节能性2个方面考虑，a喷头采用三角形布置方式，工作压力为0.30 MPa，喷头间距选用1.1R~1.2R时效果最佳；b喷头采用正方形布置方式，工作压力为0.25 MPa，组合间距为1.1R~1.2R方式时效果最佳；c喷头采用正三角形布置方式，工作压力为0.25 MPa，组合间距为1.1R~1.2R时效果最佳。 |
| 关键词: 地埋式伸缩喷头；水力性能；组合间距；均匀度；喷灌强度 |
| DOI：10.13522/j.cnki.ggps.2024435 |
| 分类号: |
| 基金项目: |
|
| Experimental study on the hydraulic performance of buried retractable telescopic sprinkler irrigation systems |
|
ZHENG Rui, DUAN Fuyi, LI Jinshan
|
|
1. Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences/Key Laboratory of Water-saving Agriculture
of Henan Province/Key Laboratory of Water-saving Irrigation Engineering, Ministry of Agriculture and Rural Development,
Xinxiang 453002, China; 2. Zibo Institute for Digital Agriculture and Rural Research, Zibo 255051, China
|
| Abstract: |
| 【Objective】Buried telescopic sprinklers are commonly used for irrigating lawns, gardens, and crops. While providing efficient and automated irrigation, they can result in uneven irrigation if not operating under optimal conditions. This paper examines the hydraulic performance and optimal working conditions of three widely used buried telescopic sprinklers in China.【Method】The experiment was conducted with sprinkler arranged in both square and triangular configurations. For each sprinkler and spatial configuration, we measured the uniformity coefficient (CU) and distribution uniformity coefficient (DU) under varying working pressures and nozzle spacings. The optimal operating parameters for each sprinkler were determined using indexes such as range, average sprinkler irrigation intensity, and irrigation uniformity.【Result】① When the working pressure ranged from 0.15 to 0.30 MPa and nozzle spacing was between 1.0R and 1.4R, the irrigation uniformity coefficient (CU) varied from 0.51 to 0.87 for all three sprinklers. At lower operating pressures, variations in pressure significantly impacted both CU and DU. ② As the operating pressure increased, the flow rate of all sprinklers increased, while the rotational speed first increased and then plateaued once the operating pressure exceeded a certain threshold. ③ The hydraulic performance and optimal configuration varied between the three types of sprinklers. Generally, Sprinklers a and c performed better in the triangular configuration, while Sprinkler b performed better in the square configuration.【Conclusion】The optimal configurations and working pressures for the three types of sprinklers are as follows: Triangular configuration, 0.30 MPa working pressure, and 1.1R-1.2R nozzle spacing for Sprinkler a; square configuration, 0.25 MPa working pressure, and 1.1R-1.2R nozzle spacing for Sprinkler b; and triangular configuration, 0.25 MPa working pressure, and 1.1R-1.2R nozzle spacing for Sprinkler c. |
| Key words: underground retractable nozzle; hydraulic analysis; combination spacing; uniformity; sprinkler
irrigation intensity |
