With the continuous advancement of urban construction, the layout of water pipeline network is increasingly complex, and the demand for water supply continues to grow. However, the leakage problem of water pipeline has become a difficult problem that cannot be ignored. Leakage not only wastes a large amount of valuable water resources, but also may have a serious impact on the service life of the pipeline, water supply safety and the surrounding environment. Therefore, the application of leak detection technology in water pipeline network is particularly important.
I. Overview of the application of leak detection technology
Leak detection technology is a key technology for the safe operation of water supply pipelines, mainly through the detection of water leakage sound in the pipeline to accurately locate the leakage point. This technology is applicable to a variety of materials for water supply pipelines, including cast iron, ductile iron, steel pipe, plastic and prestressed concrete. Although plastic pipe is widely used, its sound wave attenuation speed is fast, which brings certain difficulties to the leak detection work. Leakage detection technology is mainly divided into active and passive leakage detection of two kinds, at present the world widely used is active leakage detection technology.
Second, the hazards of water pipe leakage
The harm brought by water leakage of water pipeline should not be ignored. First of all, water leakage directly leads to the waste of water resources, exacerbating the tension of water resources in China. Secondly, water leakage if not timely maintenance, may lead to increased damage to the pipeline, shorten the service life of the pipeline, the company's economic benefits caused by loss. In addition, water leakage may cause the pipeline to fall into sewage, leading to secondary pollution and threatening the safety of water supply. Finally, water leakage may destroy the pipeline balance state, affecting the normal water supply.
Third, the leak detection of the main pipeline leak detector equipment and its characteristics
In order to effectively deal with water pipeline leakage problems, a series of professional leak detection equipment, including listening stick, electronic pipeline leak detector, tracer gas pipeline leak detector, correlation meter and water listening sensors and so on.
1. Listening rod: as one of the most commonly used leak detection equipment, listening rod has the advantages of easy to carry, not subject to environmental restrictions. It is through the listening rod end placed on the contact point, the other end of the listening to the leak near the resonance cavity to determine whether there is a leakage of water pipe abnormalities.
2. Electronic pipeline leak detector: The latest electronic pipeline leak detector adopts digital signal processing, which is able to complete the functions of frequency analysis, sound pressure value measurement and real-time cut off environmental noise. Its high resolution of sound quality helps to determine the leakage situation more accurately.
3. Tracer gas pipeline leak detector: suitable for water supply system simple site. By injecting a specific gas and detecting the gas concentration to locate the leak. However, this device is not suitable for complex underground pipelines.
4. Correlator: Locates leaks by capturing the sound of pipeline leaks for correlation analysis. Multi-probe correlators can simultaneously correlate and locate multiple pipelines, which improves the efficiency of leak detection.
5. Water Listening Sensor: As a matching detector with the correlation instrument, the water listening sensor can capture the sound of leakage in the water and improve the leakage detection effect. Especially for plastic pipes in the leakage sound detection has advantages.
Conclusion
In summary, the application of leak detection technology in water pipeline network is of great significance. Through the use of advanced leak detection equipment and technical means, water leakage problems can be found and solved in time to ensure the safety of water supply and realize the rational use of water resources. Leak detection department should strengthen the study and master the operation skills of various leak detection equipment to escort the water supply safety of the city.
