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Differential pressure-diaphragm dosing device |
YAN Yixin, SHAO Yibin, YE Fei, YAN Bipeng |
College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China |
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Abstract With the flexible waterproof diaphragm set in the closed dosing tank,a new type of differential pressure diaphragm dosing device is designed. Its working principle is different from that of the existing products.The new device uses reducing valve set in the water pipe to produce differential pressure.The differential pressure has an effect on closed dosing tank and completes the dosing. The flexible waterproof diaphragms separate the water and reagent, keeping the dosing density unchanged. The connection among pipeline pressure,rate of flow and dosing flow was analyzed, finding out that dosing flow and pipeline pressure of the new device are irrelevant, but in direct proportion to the rate of pipeline flow. The dosing device has dosing flow self-adjusting function and can adapt to the changes of the main pipeline flow to guarantee dosing uniformity. The experimental result shows that the pipeline head loss of the device is less than 0.5 m and dosing density error under the same flow of different time is less than 4%, dosing density error under different flow is less than 2%. Changing the setting of the relief valve can adjust the dosing proportion, to meet the needs of different users. The dosing device will not reduce the pipeline pressure sharply and the dosing concentration is stable. Therefore, the device can be widely used in agricultural irrigation facilities, dosing and fertilizing of the drip irrigation system.
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Received: 29 October 2015
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[1]张承林,郭彦彪.灌溉施肥技术[M].北京:化学工业出版社,2006.[2]DANSOA E O, MICKSONA S A, SABI E B, et al. Effect of different fertilization and irrigation methods on nitrogen uptake, intercepted radiation and yield of okra(Abelmoschus esculentum L.)grown in the Keta Sand Spit of Southeast Ghana [J].Agricultural water management,2015,147:34-42.[3]LI Jiusheng, DU Zhenhua, LI Yanfeng.Drip fertigation uniformity and moisture distribution as affected by spatial variation of soil properties and lateral depth and injector type[C]. Louisville, Kentucky, USA:ASABE Meeting Presentation,2011.[4]LARRY S. Drip irrigation for raw crops [M]. Las Cruces:New Mexico State University,2001.[5]GARCIA Prats Alberto, GUILLEM-Pico Santiago. Ada-ptation of pressurized irrigation networks to new strategies of irrigation management: energy implications of low discharge and pulsed irrigation[J]. Agricultural water management,2016,169:52-60.[6]BRACY R P, PARISH R L, ROSENDALE R M.Fertigation uniformity affected by injector type[J].Hort technology,2003,13(1):103-105.[7]韩启彪,冯绍元,黄修桥,等.我国节水灌溉施肥装置研究现状[J].节水灌溉,2014,12(1):76-79. HAN Qibiao, FENG Shaoyuan, HUANG Xiuqiao, et al.Research on fertilizer injection units in saving water irrigation in China[J]. Water saving irrigation, 2014,12(1):76-79.(in Chinese)[8]ZEMA Demetrio Antonio, NICOTRA Angelo, TAMBURINO Vincenzo, et al. A simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems[J].Renewable energy,2016,85:409-506.[9]TARJUELO Jose M, RODRIGUEZ-Diaz Juan A, ABADIA Ricardo, et al. Efficient water and energy use in irrigation modernization: lessons from Spanish case studies[J]. Agricultural water management,2015,162:67-77.[10]韩启彪,吴文勇,刘洪禄,等.三种水力驱动比例式施肥泵吸肥性能试验[J].农业工程学报,2010,26(2):43-47. HAN Qibiao, WU Wenyong, LIU Honglu, et al. Expe-riment on fertilizer suction performance of three hydraulic driven pumps[J].Transactions of the CSAE, 2010, 26(2): 43-47.(in Chinese)[11]韩启彪,冯绍元,黄修桥,等.滴灌压差施肥技术研究概况与发展趋势[J].中国农村水利水电,2014,9(1):1-4. HAN Qibiao, FENG Shaoyuan, HUANG Xiuqiao, et al. Research on the pressure differential fertilization of drip irrigation[J].China rural water and hydropower,2014,9(1):1-4.(in Chinese)[12]沈雪民,封俊,张学军.文丘里差压式喷灌施肥装置的性能研究[J].节水灌溉,2001(1):20-21. SHEN Xueming, FENG Jun, ZHANG Xuejun. Capabi-lity research of venturi different-pressure sprinkler irrigation fertilization installation[J].Water saving irrigation, 2001(1):20-21.(in Chinese)[13]严海军,王子君,陈燕.文丘里施肥器空化过程高速摄像分析[J].排灌机械工程学报,2014,32(10):901-905. YAN Haijun, WANG Zijun, CHEN Yan. High-speed photography analysis on cavitation of Venturi injector[J]. Journal of drainage and irrigation machinery engineering, 2014,32(10):901-905.(in Chinese)[14]韩启彪,黄兴法,刘洪禄,等.6种文丘里施肥器吸肥性能比较分析[J].农业机械学报,2013,44(4):113-117. HAN Qibiao, HUANG Xingfa, LIU Honglu, et al. Comparative analysis on fertilization performance of six venturi injector[J]. Transactions of the CSAM, 2013,44(4):113-117.(in Chinese)[15]ROBERTO V,MONTOYA Y E. Operation setting nomograms for Unidrench Venturi injector [J]. Agronomia colombiana, 2010, 28(2):303-308.[16]李凯,毛罕平,李百军.混药混肥装置控制性能分析[J].农业机械学报,2003,34(1):50-53. LI Kai,MAO Hanping,LI Baijun,Analysis on control performance of various pesticide or fertilizer mixers[J]. Transactions of the CSAM, 2003,34(1):50-53.(in Chinese)[17]WOLTERING L, IBRAHIM A, PASTERNAK D,et al.The economics of low pressure drip irrigation and hand watering for vegetable production in the Sahel[J]. Agricultural water management,2011,99(1):67-73.[18]孟一斌,李久生,李蓓.微灌系统压差式施肥罐施肥性能试验研究[J].农业工程学报,2007,23(3):41-45. MENG Yibin, LI Jiusheng, LI Bei. Fertilization performance of the pressure differential tank in micro-irrigation system[J].Transactions of the CSAE, 2007,23(3):41-45.(in Chinese)[19]李百军,王晓宁.水动施肥装置的设计与试验[J]. 江苏大学学报(自然科学版),2002,23(2):9-12. LI Baijun, WANG Xiaoning. Design and experiment on hydrodynamic fertilizer injection [J]. Journal of Jiangsu University(natural science edition),2002,23(2):9-12.(in Chinese) |
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