Water is the basic material for human survival, but the total amount of water resources in China accounts for only six percent of the world total, and the per capita water is about a quarter of the world per capita water. How to reduce the waste of fresh water resources and improve the utilization rate of water resources is a very important task. Leaky pipes can cause the waste of fresh water resources, so it is necessary to detect and repair them in time. There are two forms of pipeline leaks: account leaks and concealed leaks.
Account leakage is the normal leakage of pipeline loss and various facilities, the leakage time will not be too long, it is easy to find the leakage point, find the leakage point and repair it in time, generally it will not cause a large amount of pipeline water loss, and the economic loss caused will not be too big.
Dark leakage is a more complex leak, generally hidden, the leak may be very small, not easy to detect, the leakage time is long, the amount of leakage caused is more serious, generally found in the underground pipeline clean water or sudden changes in water pressure, may be able to detect the pipeline has a leak, and then find the leak repair.
Pipeline leak detection requires professionals to find the leak point. A leak point in the water supply network will cause a great waste of water resources and, if not repaired for a long time, may also lead to the paralysis of the residential water system, so leak detection is a very important task.
Leak detection work is mainly based on the sound of pipe leaks to find the location of pipe leaks, which is influenced by many factors, especially urban noise has a great impact on it. However, water leakage anomaly is generated under a specific condition and has its own specificity, so the work is based on the characteristics of water leakage anomaly to determine whether the sound anomaly is a water leakage anomaly. The characteristics of water leakage abnormality are:
(1) The anomaly is distributed above the pipe and on the dew point of the pipe, and has its own specific frequency.
(2) The sound is continuous and uninterrupted, and the sound intensity varies very little for a certain monitoring point.
(3) The anomaly has a certain scale, extending along the direction of the pipe, and disappearing quickly along the vertical pipe direction.
(4) The water leakage anomaly has its obvious anomaly center, and the anomaly center is distributed above and near the pipeline, and the sound is obviously weakened when transported away from the pipeline.
(5) The sound of water leakage has a very obvious relationship with the pressure inside the pipe, and the sound is obviously weakened as the pressure inside the pipe decreases, and the water leakage anomaly disappears immediately when the inlet valve of the pipe is closed.
(6) The water leakage abnormality corresponds to the abnormality heard at the dew point of its pipe. The surface monitoring of water leakage anomalies, its pipe out of the dew point must have a corresponding anomaly display.
Concealed leaks generally have small leak points and need to be pressurized in the pipe. Raise the leak noise at the leak point. Facilitate the detection of the instrument.
Water pipe leak detector, generally called leak detector, or pipe leak detector, underground pipe leak tester, etc..
Its working principle is the pressure water pipe leak after the pressure water from the pipe breakout rushing out, and the pipe wall friction generated by the sound vibration and other additional vibration caused by the transmission to the pipe above the ground, with the instrument in the road to detect and find out the leak.
In general, the basic detection method is, connect the host, headphones, sensors. Turn on the switch, put on the headphones, place the sensor on the road above the pipeline, place it step by step according to the length of the pace, and listen to it step by step, the closer to the leak, the stronger the signal, the farther away from the leak the weaker the signal, and achieve the purpose of detecting the leak by comparing the signal strength between different points. Therefore, we use the instrument, a single point to listen to the leak signal is not meaningful, to multi-point repeatedly compared, compared with the sound vibration of the larger place is the leak, of course, we have to consider many other additional factors, such as the direction of the leak breakage mouth, because the pipe is round, if the side of the leak, may be larger points instead in the side of the road above the pipe, rather than being the pipe Above the road, so the location of the pipeline should be known, in addition to the tee, bend, water pressure, burial depth, buried layer, etc. will have an impact, the detection should take these into account.
Hunan Puqi Geological Exploration Equipment Research Institute is a professional institution engaged in pipeline leak detection equipment and urban pipeline loss reduction research. Mainly committed to the underground pressure pipeline leak detector application technology research and scientific research and undertake the "National Thirteenth Five-Year Water Special Research Project". Our institute insists on the strategic goal of "developing the institute with science and technology and strengthening the institute with talents", and implements the open-ended policy of running the institute. advantages.
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