System and method for measuring pipe network outside source invasion via volume method

Abstract

The invention discloses a system for measuring pipe network outside source invasion via a volume method, which comprises: an invasion pipeline, a water tank, an observation tube, a liquid level sensor and a pressure sensor, wherein the invasion pipeline is communicated with the main pipe of a pipe network and provided with an invasion opening; the water tank is used for storing water flow output from the invasion pipeline; the observation pipe is communicated with the water tank and used for observing the variation of a water level; the liquid level sensor is installed in the water tank to measure the variation of the water level so as to calculate the actual value of the pipe network outside source invasion; the pressure sensor is installed in the main pipe, used for measuring the hydraulic pressure change in the main pipe, and combined with the pressure change data measured by the liquid level sensor to calculate the theoretical value of the pipe network outside source invasion; the invention also discloses a method for measuring pipe network outside source invasion via a volume method; by means of comparing the actual value with the theoretical value, the system for measuring the pipe network outside source invasion via the volume method amends the theoretical value, improves the measurement accuracy, and is also provided with the water tank for stabilizing the hydraulic pressure and the liquid level sensor that replaces a video cassette recorder to record the variation of the water level of the observation tube, so that the experiment operation is simpler, the data accuracy is higher, and the data processing is more convenient.

Description

technical field [0001] The invention relates to the technical field of water supply pipe network, in particular to a measurement system and method for external source intrusion of pipe network. Background technique [0002] After the tap water leaves the factory, the water is polluted during the transportation of the water supply network, which is one of the important ways of drinking water pollution. Among them, the problem of low negative pressure in the water supply pipe network is an important cause of water pollution in the pipe network. The low negative pressure event is actually a water hammer (or water hammer) process. When the flow rate in the pipeline changes rapidly, the flow rate suddenly decreases or increases accompanied by large fluctuations in pressure. Under normal water supply conditions, the pressure inside the pipe is greater than the pressure outside the pipe, and water is lost from the defects in the pipe network. Once a low negative pressure event oc...

AI Technical Summary

Problems solved by technology

This method has the problem of tracer residue and attenuation in the experiment, which affects the accuracy of the experiment and also affects the experimental process of the next working condition

At the same time, the experimental process is relatively cumbersome, and it is difficult to collect water from the pipe network.

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