How to reduce the leakage rate of water supply network
The urban water supply pipe network is mainly responsible for the important task of delivering water for living and production in the city. With the gradual acceleration of the urbanization process and the gradual expansion of the scale of the city, the requirements for the construction of the urban water supply pipe network are also gradually increasing. How to reduce the leakage rate of water supply network has become the top priority.
The reason for the leakage of the pipe network
1. Aging of the pipe network: The service life of the water supply pipe network is relatively long, and the aging of the pipe network is more serious, which is more likely to cause water leakage at the pipe interface and pipe burst.
2. The quality of the pipe is relatively poor: According to the analysis of the currently used pipes and pipes, the prestressed cement pipes and reinforced concrete pressure pipes are relatively loose in structure, brittle, prone to porosity, serious scaling and relatively large roughness coefficient; glass sand pipes are Relatively loose, brittle, low strength and poor compressive performance, etc., it is more prone to cracks during loading and unloading and installation and use, resulting in water leakage.
3. The construction technology is relatively backward: the construction technology caused by the characteristics of the water supply pipes will bring a lot of inconvenience to the installation and construction of the pipes. Because the construction method in the early stage is relatively simple, the form is complex, and the technology is backward. In addition, there are certain problems in the construction quality, which makes it difficult to guarantee the installation quality above a certain level, which will bring hidden dangers to the water supply network.
4. The soil at the back of the buttress is relatively loose: it has a large thrust at the elbows and tees with large diameters. Once the soil at the back of the buttress is loose, it will cause the interface at the elbow or the tee to be pulled. open, causing water leakage problems.
5. Auxiliary facilities of the pipeline: the valve is corroded, worn, and the dirt is embedded, so that the pipeline cannot be closed tightly. The first reason is water leakage caused by long-term non-maintenance and improper management; The wall directly presses on the pipeline, and the well wall settles and crushes the pipeline.
6. Temperature change stress: The water supply pipeline will change elastically with the change of temperature, resulting in temperature change stress. When the water supply pipe network runs for a long time and is in a fatigued state for a long time, cracks or even damage will occur.
When the air temperature is lower than 0 degree , the pore water in the soil freezes and the volume changes, which produces a frost heave force on the water supply pipe network, plus the proportional relationship between the force and the temperature, resulting in a temperature difference between the water supply points. During this period, if the water supply pipe network is pressurized and replenished, the water supply pipe will be damaged by stress, which will lead to the leakage of the water supply pipe network.