声波振动式非金属燃气管探测方法研究及应用

Research and Application of Acoustic Vibration-based Detection Methods of Non-metallic Gas Pipeline

聚乙烯(Polyethylene,简称PE)管材因施工方便,抗腐蚀和环保性好等优点,被广泛地应用于城镇中、低压燃气输送中。由于PE管为惰性材料,不导电、不导磁,传统的地下管线探测定位方法及设备极难掌握其准确的地下空间位置,这给城市建设施工及燃气公司的运营维护管理带来很大的困难。本文首先分析了传统PE管线探测方法的局限性;然后,重点介绍了声波振动式管道探测方法的工作原理,并借助声学理论公式推导分析理想管道模型中声波的传播特性及规律,为声波振动探测技术的应用提供理论指导;最后,结合实际城镇中压、低压PE管道探测项目,验证了该探测方法及仪器设备的可靠性与精度。实践表明,该方法及设备能克服传统非金属PE管道探测方法面临的种种约束条件,能高效解决城市非金属PE管道探测难题,具有较广泛的应用前景及推广价值。

Polyethylene(PE)pipe is widely used in medium and low pressure gas transmission in cities and towns due to its advantages of convenient construction,corrosion resistance and good environmental protection.Because PE pipe is an inert material,not conductive or magnetic,it is extremely difficult for traditional underground pipeline to detect its accurate underground space location,which brings great difficulties to urban construction and operation and maintenance management of gas companies.After analyzing the limitations of traditional PE pipeline detection method and the acoustic theoretical formula of acoustic wave,this paper introduces the working principle of acoustic vibration pipeline detection method.Then the reliability and accuracy of the detection method and instrument are verified by combining with the actual urban medium pressure and low pressure PE pipeline detection project.The practice shows that this method and equipment can overcome the various constraints of the traditional non-metal PE pipeline detection method,and can efficiently solve the problem of urban non-metal PE pipeline detection efficiently,which has a wide range of application prospect and promotion value.