With the continuous progress of urbanization, heat pipeline as an important part of urban infrastructure, its safe and stable operation is directly related to the quality of life of residents and the normal operation of the city. However, pipeline leakage has always been a major problem for city managers and residents. In order to effectively deal with this problem, a variety of pipeline leak detectors have emerged in the market, which adopt different leak detection methods and have their own characteristics. In this paper, we will compare and analyze the leak detection methods of different pipeline leak detector, in order to provide readers with reference and reference when choosing suitable leak detection methods.
1. Valve spigot and road surface listening method
This method relies on the use of listening pole and pipeline leak detector, through the workers' hearing and experience to determine the location of water leakage. Its advantages are simple operation and low cost. However, it is limited by the amount of ambient noise and the thickness of the pipeline's insulation, so it usually needs to be carried out at night, and the effect may not be obvious for leaks with small leakage volume or low pressure. In addition, this method requires high experience of workers, novice may be difficult to accurately judge.
2. Correlation methodpipeline leak detector
The correlation method is based on the correlation analysis of the abnormal sound generated by the water leak to determine the location of the leak. Its advantage lies in accurate positioning and high efficiency, especially suitable for leak detection of large pipe networks such as heat pipes. However, it requires the installation of probes at both ends of the pipeline, and for the case of long pipeline distances and a small number of valves, the water leakage sound signal may be attenuated severely, affecting the positioning effect. In addition, for leaks with a small amount of leakage, there may also be a situation in which the leakage cannot be accurately measured.
3. Regional meter installation method
The regional meter method monitors the difference in pressure difference by installing pressure gauges at both ends of the pipe section to determine the water leakage. The advantage is that it can be detected in sections, easy to manage. However, the choice of the location of the meter is often a difficult problem, which requires comprehensive consideration of a variety of factors. In addition, this method usually needs to be carried out after the heat is stopped, there are limitations for real-time detection of water leakage points.
4. Temperature measurement method pipeline leak detector
The temperature measurement method is used to determine the leakage situation by measuring the change of the surface temperature of the pipeline. Its advantage is that it is intuitive, simple, and applicable to the heating area is small, pipeline clear area. However, for complex terrain and large heating area, the application of temperature measurement method is somewhat limited, and it may be difficult to accurately determine the location of the leakage point.
Different pipeline leak detector leak detection methods have their own advantages and disadvantages, the choice of which method needs to be based on the actual situation for comprehensive consideration. In practical application, we can combine multiple methods to make a comprehensive judgment to improve the accuracy and efficiency of leak detection. At the same time, with the continuous progress and innovation of technology, more efficient and accurate pipeline leak detector may come out in the future, which will provide more powerful guarantee for the safe operation of urban pipeline network. Therefore, we should continue to pay attention to the development and application of new technologies in order to adapt to the changing market demand.
