自压灌溉管网输水干管阀控关键参数模拟研究  

Simulation study on key parameters of valve control in main pipe of self-pressure irrigation pipe network

作　　者：孙鹏 张江辉 白云岗 曹彪 蔡世杰 赵经华[1] 余其鹰 车红兵 SUN Peng;ZHANG Jianghui;BAI Yungang;CAO Biao;CAI Shijie;ZHAO Jinghua;YU Qiying;CHE Hongbing(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Institute of Water Resources and Hydropower Research,Urumqi 830049,China;Bozhou Water Conservancy Irrigation Experimental Station,Jinghe 833300,China)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水利水电科学研究院,乌鲁木齐830049 [3]博州水利灌溉试验站,新疆精河833300

出　　处：《农业资源与环境学报》2024年第6期1342-1351,共10页Journal of Agricultural Resources and Environment

基　　金：国家重点研发计划项目(2021YFD1900803);新疆维吾尔自治区重大科技专项(2020A01003);天山英才创新领军人才项目(2022TSYCLJ0069);新疆水利科技专项(XSKJ-2023-29)。

摘　　要：为了消除灌区规模化输水管道的关阀水锤影响,保证输水管道安全运行,本研究针对灌区输水管道中关阀水锤的特点,以新疆克拉玛依某农业灌区输水管道为例,基于水锤计算基本理论,通过数值计算模拟不同进排气阀参数起到的防护效果,并对大口径、大流量管道关阀时间规律进行数值模拟。结果表明:安装14个进排气阀可以保证管道正常关阀且不出现负压,在首端弯折处桩号(k0+066)安装5个进排气阀形成进排气阀组,在桩号(k0+562)处安装3个进排气阀形成进排气阀组,在距管线约1100 m处安装1个进排气阀;当管道流量在0.5~6.0 m^(3)·s^(-1)时采用一阶段线性关阀,在6.0 h内可以关闭;在6.0~10.0 m^(3)·s^(-1)时采用两阶段关阀,前三分之一时间快关阀门,随流量增加,快关角度从70%降低到50%,关阀时间从6.0 h增加到9.0 h,可以消除管道负压。研究表明,合理设置进排气阀,能够有效消除自压灌溉管网输水干管关阀水锤危害,配合合适的关阀操作,可以实现自压灌溉管网输水干管安全高效运行。In order to eliminate the influence of valve closing water hammer on large-scale water pipeline in irrigation area and ensure the safe operation of water pipeline,in view of the characteristics of the valve closing water hammer in the water pipeline of the irrigation area,this study took the water pipeline of an agricultural irrigation area in Karamay,Xinjiang as an example,based on the basic theory of water hammer calculation,the protective effect of different intake and exhaust valve parameters is simulated by numerical calculation,and the valve closing time law of large diameter and large flow pipeline is simulated numerically.The installation of 14 intake and exhaust valves can ensure the normal valve closing of the pipeline without negative pressure.Five intake and exhaust valves are installed at the pile number(k0+066)at the bend of the head end to form an intake and exhaust valve group.Three intake and exhaust valves are installed at the pile number(k0+562)to form an intake and exhaust valve group,and an intake and exhaust valve is installed at a distance of about 1100 m from the pipeline.When the pipeline flow rate is 0.5-6.0 m^(3)·s^(-1),a one-stage linear valve closing is adopted,which can be closed within 6.0 h.The two-stage valve closing is adopted at 6.0-10.0 m^(3)·s^(-1),the valve is closed quickly in the first third of the time.With the increase of flow rate,the fast closing angle is reduced from 70%to 50%,and the valve closing time is increased from 6.0 h to 9.0 h,which can eliminate the negative pressure of the pipeline.Through the study of water hammer and valve closing time of pipeline valve closing,the valve closing time of pipeline is reduced.

关 键 词：灌溉管网 重力流 进排气阀 关阀规律 

分 类 号：S277[农业科学—农业水土工程]