Leakage in underground water supply pipes not only affects the stability and quality of water supply services, but also leads to the waste of water resources and environmental pollution. Therefore, effective leakage detection and repair is an important part of guaranteeing water supply service. This paper will introduce the methods and techniques of water leakage detection, as well as the matters that need attention in the detection process.
Second, the importance of water leakage detection
1. Guarantee water supply services: effective leakage detection can be found and repaired in a timely manner, thus guaranteeing the stability and quality of water supply services.
2. Saving water resources: water leakage can lead to waste of water resources, not only affecting the water supply service, but also increase the cost of water supply. Effective water leakage detection can reduce the waste of water resources.
3. Protect the environment: water leakage will lead to increased moisture in the soil, which may lead to problems such as ground subsidence and damage to houses. Effective water leakage detection can find and repair these problems in time to protect the environment.
Third, the method of water leakage detection
1. Sound Detection: When water flows out of the pores of the pipeline, it will produce different frequencies of "leakage noise". Through the use of pipeline leak detector and other equipment, you can detect these sounds, so as to determine the location of the leak.
2. Pressure test: By pressurizing the inside of the pipe and observing the pressure change, you can determine whether there is a water leakage phenomenon. This method requires specialized equipment and operators, but is more accurate.
3. Visual inspection: For exposed pipes, leakage can be detected by direct observation. For pipes buried in the soil, you can use ground-penetrating radar and other equipment to find the leakage location.
4. Tracer gas detection method:
Gas is fed to the sealed pipeline, and after the inflation test is completed, the pipeline is pressure tested to look for anomalies and confirm the leaking pipe section. Inject the hydrogen-nitrogen mixture (5% hydrogen and 96% nitrogen, hydrogen is the lightest and has strong penetration) into the pipeline, generally up to 2kg/cm². The bell-type probe of the hydrogen detector will be pumped above the pipeline along the pipeline direction at intervals of 0.5 to 0.8m, each time for about 20-30 seconds, the abnormal point and the surrounding area to make a detailed record, and then further testing work to find out the exact location of the leakage point.
This method is applicable to a variety of pipeline testing, with safe, non-toxic, non-flammable, high detection accuracy, the instrument is simple to operate, can be a water pipe, gas pipeline tiny leaks to locate.
Fourth, the precautions of water leakage detection
1. Safety first: when conducting water leakage detection, you need to pay attention to safety. Especially in the use of pressure testing and other detection methods that require the use of equipment, you need to ensure the safety of the equipment and the professionalism of the operator.
2. Select the appropriate detection method: different water leakage detection methods for different occasions and situations. When choosing the detection method, you need to choose the most appropriate detection method according to the actual situation.
3. Timely repair: Once the leak is found, it needs to be repaired in time. Prolonged leakage will not only lead to water waste and environmental problems, but also increase the difficulty and cost of repair.
4. Regular testing: In order to ensure the stability and quality of water supply services, regular leakage testing of water supply pipes is required. This can detect and repair leaks in time to avoid the expansion and deterioration of the problem.
V. Conclusion
Leakage problems in underground water supply pipes not only affect the stability and quality of water supply services, but also lead to the waste of water resources and environmental pollution. Therefore, effective leakage detection and repair is an important part of guaranteeing water supply services. When choosing a suitable detection method, it needs to be selected according to the actual situation. At the same time, it is necessary to pay attention to safety issues and strictly follow the operating procedures for detection and repair work. Regular leakage detection can detect and repair the problem in time to avoid the expansion and deterioration of the problem. Therefore, it is recommended to carry out regular leakage detection of water supply pipes to ensure the stability and quality of water supply services.
