Insulating tube water channel leak detecting method

Abstract

An insulating tube leakage detecting method is a method for detecting the leakage of the insulating tube water channel with embedding earth comprising the wet earth. In the method a detecting instrument with an earth return is included, the detecting instrument is connected to the probe head comprising a water-contacting contact, the probe is arranged in the water channel of the insulating tube, and the invention is characterized in that the water leaking signal of the insulating pipeline is realized by the earth resistance variate of the probe head in the detecting tube. If the water channel of the insulating tube of an area does not have water linkage, then a comparatively stable hydroelectricity resistance value exists between the probe in the insulating pipeline of the area and the earth conducting pipeline, when water linkage occurs in the area the probe in the pipeline will form a returning conduction with shorter distance through the water leakage, therefore the earth resistance value of the probe is diminished correspondingly, and the magnitude of the electric quantity value can reflect whether the water leakage occurs in the area.

Description

technical field [0001] A waterway leak detection method, in particular to an insulating pipe waterway leak detection method. Background technique [0002] For the leak detection method of insulated pipes and waterways, the current solution is the same as that of ordinary metal pipes. Usually, the leak listening method is used. When the people are quiet at night, a leak listener is used. The weak sound wave is amplified, and then transmitted to the earpiece, so that people can get the message of water leakage. However, this method is often taken only when there is a water leak, and it is usually not carried out frequently. Even if the leak is heard, there is no great confidence, especially because the pipeline from the water plant is very long, buried deep, and the terrain is complicated. However, the leaking problem cannot be solved only by listening to leaks. In the past, we had proposed a patent application for "Leak detection method of non-conductive material water supp...

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Problems solved by technology

However, this method is often taken only when there is a water leak, and it is usually not carried out frequently. Even if the leak is heard, there is no great confidence, especially because the pipeline from the water plant is very long, buried deep, and the terrain is complicated. , the leakage problem cannot be solved only by listening to leaks

In the past, we had proposed a patent application for "Leak detection method of non-conductive material water supply pipeline", which was published on March 28, 2007, with application number 200610115384.7. Suitable, because the conductivity of sand and gravel is relatively poor, so it can be carried out according to the specific implementation method of this patent. It is to insert electrodes in many different areas outside the water pipe into the soil, and connect the electrodes in turn, but at the beginning The implementation is carried out in dry sandy soil, and the electrodes in different areas outside the pipe can maintain a large resistance value, so that when the water leaks, the resistance between the inner and outer electrodes at the leaking point and the inner and outer electrodes not at the leaking point The resistance value difference of the electrodes is relatively large, so it can be used as the leak signal source of the electric measuring instrument; later, when it is implemented in wet soil, it is not satisfactory, and the electrodes in different areas outside the tube can no longer maintain a large resistance In this way, when the water leaks, the difference between the resistance value between the inner and outer electrodes at the leaking point and the inner and outer electrodes not at the leaking point is very small, so it is difficult to use it as the leak signal source of the electric measuring instrument

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