2009 Fiscal Year Final Research Report
Studies on Optimization of Safety Measure in Pipeline for Field Irrigation with Automatic Control Valve
| Project/Area Number |
19580282
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | University of Miyazaki |
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Principal Investigator |
INAGAKI Hitone University of Miyazaki, 農学部, 教授 (30325732)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 自然流下系パイプライン / 低圧化システム / 自動減圧弁 / 安全弁 / 定流量弁 |
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| Research Abstract |
This dissertation presents a series of studies conducted for investigating applicability of automatic control valves to guarantee the safety in field-irrigation pipelines The final goal of the studies is to achieve a pressure reduction on field irrigation pipelines using automatic control valves. For the purpose, the studies focused on the following two main objectives ; (1) in natural down-flow pipelines, establish a pressure control technique by applying automatic control valve and safety valve, and (2) in pumping pipelines, investigate for water column separation and establish a technique of controlling water hummer pressure by applying check valve. These techniques contribute to reduce maximum pressure in the pipeline and thus enable a safe use of low-cost polyvinyl-chloride pipes for field irrigation pipelines. Also, it allows to construct pumping pipeline system without having conventional facilities for negative pressure measures.
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