Views: 4 Author: pqwt Publish Time: 2023-03-29 Origin: PQWT
Water pipe leaks often bring great trouble to our daily lives, and it boils down to the fact that when the water pipes were first installed there was no water test, so what are the ways to detect water leaks in the water pipes? Puchi research has the following summary for you.
1、Environmental survey method
The most intuitive way to determine the clues and scope of water leakage. According to the water supply network map and the situation provided by the relevant personnel, a detailed investigation of the water supply pipeline. Including the pipeline connection, distribution, material and the surrounding media. And determine the leakage point by observing the situation of road surface, winter snow first melting, lush grass above the pipeline, down wells and other ditches with long flow of clear water.
2、Pressure test comparison method
Pipeline breakage leakage, such as leakage volume is large, will generally cause the local pressure of the pipe network to reduce, the closer to the leak point the lower the pressure. The use of hydrants for pressure measurement comparison, can quickly lock the leak area.
3、Chlorine residual detection method
According to the national standard for factory water, the residual chlorine content should be no less than 0.3 mg/l after 30 minutes of contact between chlorine and water, and the content of free residual chlorine in the end water of the pipe network should be no less than 0.05 mg/l. The use of residual chlorine and o-toluidine reflect the principle of generating yellow quinone-type compounds, through the detection of the collected water samples, through visual colorimetric test can determine whether the water supply network leakage.
4、Acoustic leak detection method
The first one is used to find the clues and scope of the leakage, referred to as the predetermined location of the leakage point; the latter two are used to determine the location of the leakage point, referred to as the precise location of the leakage point.
5、Valve bolt listening method
Valve bolt listening method is generally used to listen to the sound rod directly in the pipeline exposure points (such as fire hydrants, valves and exposed pipes, etc.) to listen to the sound of water leakage generated by the leak point, so as to determine the leaky pipeline, narrow the scope of leak detection. Metal pipeline leakage sound frequency is generally between 300 ~ 2500Hz, while the frequency of non-metallic pipeline leakage sound between 100 ~ 700Hz. The closer the listening point is to the location of the leak, the greater the sound of the leak is heard; conversely, the smaller.
6、Ground listening method
When the leaky pipe section is identified through the pre-location method, the leaky point of the underground pipe is listened to and precisely located on the ground with a pipe leak detector. Listening to the way along the leaky pipeline to the spacing of 50-70cm or so point by point listening to compare the abnormal points at the request of less than 20cm, and repeatedly at the abnormal points to listen to the sound analysis to determine the location of the abnormal points. When the ground pickup is close to the leak point, the stronger the sound of water leakage is heard and measured, reaching the maximum above the leak point. In order to avoid interference, the operation is generally carried out within 11:00 p.m. to 5:00 a.m.
7、Drilling and positioning method
When the road listening is completed, determine the anomaly, use the pipeline locator to locate the pipeline near the anomaly, drill with an impact drill right above the pipeline, and then use the listening rod to directly contact the pipe body to listen to the sound. Using this method, the leakage point can be further pinpointed.
Hunan Puqi Geological Exploration Equipment Research Institute is a professional institution engaged in the research of pipeline leakage detector and urban pipeline loss reduction. Mainly committed to the underground pressure pipeline leakage detector application technology research and scientific and technological research has been established with Harbin Institute of Technology, the 13th Five-Year National Water Special R & D base, with Hunan University of Science and Technology, the establishment of a strategic innovation cooperation base of industry-university-research, and the University of Algeria reached a strategic partnership, our Institute adhere to the "science and technology to develop the hospital, talent to strengthen the hospital We adhere to the strategic goal of "science and technology, talent to strengthen the hospital", the implementation of open hospital policy, in the new generation of underground pressure pipe leak detector R & D field of independent core leak detection technology has caused great concern in the industry, pipe leak detector has applied for a number of inventions, utility models, appearance patents, the formation of their own unique technical characteristics and advantages.