Distributed thermal pipeline leakage monitoring system

Abstract

The invention provides a distributed thermal pipeline leakage monitoring system. The system comprises an optical fiber temperature measuring host, an industrial personal computer and optical temperature measuring cables; the optical fiber temperature measuring host comprises N temperature measuring channels; each temperature measuring channel is correspondingly connected with one optical temperature measuring cable; the optical temperature measuring cables are laid along the pipeline in the whole journey by using a thermal pipeline as a carrier; and the temperature measuring channels send pulsed optical signals to the optical temperature measuring cables, scattered light sent back from the insides of the optical temperature measuring cables is acquired in real time, according to the refraction index of the optical temperature measuring cables and the light intensity of the scattered light, the whole-line temperature and temperature change rate value curve of the thermal pipeline is obtained, the average temperatures and the maximum temperature change rates of to-be-monitored parts are determined according to the lengths, away from the optical fiber temperature measuring host, of the optical cables laid at the different to-be-monitored parts, and whether the thermal pipeline is in the leakage state is judged according to the set temperature change rate threshold value.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring and measurement of thermal systems, and in particular relates to a distributed thermal pipeline leakage monitoring system. Background technique [0002] The thermal pipeline is the basic component of the heating system of the city or the park, and it is the circulation path for the heating medium to be transported to the thermal inlet of the building. In order to save the occupied area, at present, the construction method of laying the thermal pipeline is basically buried. However, the underground soil contains various substances such as air, water, salt, acid and alkali, and its complex environment is easy to damage the thermal pipeline, especially the pipeline. The valves, filters, water separators, water collectors and pipeline connections in the pipeline are corroded, resulting in pipeline leakage, causing serious waste of energy, shortening pipeline life and other problems, and may...

AI Technical Summary

Problems solved by technology

There are many technical means for temperature sensing and monitoring, but since thermal pipelines are transported over long distances, when using infrared thermal imaging technology and ordinary point temperature sensors to cover the entire pipeline network and monitor the temperature in real time, the system structure is complex and the operation and maintenance costs are relatively high. high

Images