基于智能消防栓的供水管网爆管监测试验

Pipe Burst Monitoring Test of Water Supply Network Based on Intelligent Fire Hydrant

针对市政管网爆管监测问题,采用智能消防栓组网进行水压在线检测研究。选择具有环网的两类市政管网,利用智能消防栓压力传感器和窄带物联网(NB-IoT),并通过消防栓放水模拟爆管实时采集压力信号。分析结果表明,日常工况存在瞬态压力突变信号,爆管导致的压力瞬变信号虽有幅值但衰减较快,且爆管瞬态压降明显大于稳态压降;进一步结合水力模型分析,监测点合理密布、合理采样及局域联动分析可有效甄别爆管信号。

An intelligent fire hydrant network was used for online water pressure detection to solve the problem of pipe burst monitoring in municipal pipe network.Two kinds of looped municipal pipe network were selected in the experiment.The pipe burst was simulated by opening the fire hydrant valve,and the real-time pressure signal was collected by the intelligent fire hydrant pressure sensor and NB-IoT.There was transient pressure mutation signal in daily working conditions.Although the pressure transient signal caused by pipe burst had amplitude,it attenuated rapidly,and the transient pressure drop of the pipe burst was obviously greater than that of the steady pressure drop.Combined with the hydraulic model,it was further analyzed that the reasonable distribution of the monitoring sites,reasonable sampling and local linkage analysis could effectively identify the pipe burst signal.