Leakage detection device for natural gas pipeline

Abstract

The invention discloses a leakage detection device for a natural gas pipeline. The leakage detection device is characterized by comprising an optical transmitting fiber, a plurality of optical fiber filters, a plurality of optical fiber sensors, a light source, a first wavelength division multiplexer, an optical detector, a second wavelength division multiplexer and a locating processor; the optical transmitting fiber is covered with vibration-absorbing materials and is isolated from a sound field; the smoothing wave lengths of the optical fiber filters are different and are connected to the optical transmitting fiber after connected in parallel at equal distance; the optical fiber sensors are laid on one side of the natural gas pipeline, are connected to the optical fiber filters and are used for detecting pipeline leakage and vibration signals; the first wavelength division multiplexer is arranged between the light source and the optical transmitting fiber; the optical detector is connected to the optical transmitting fiber and is used for detecting the pipeline leakage and vibration signals reflected by the optical fiber sensors; the second wavelength division multiplexer is connected between the optical transmitting fiber and the optical detector; and the locating processor is connected to the optical detector and is used for recognizing leakage signals, locating leakage points of the natural gas pipeline according to the leakage signals, providing locating calculation formulas of the leakage points and realizing accurate locating of the leakage points.

Description

technical field [0001] The invention relates to the field of mechanical vibration measurement, in particular to a natural gas pipeline leakage measurement device. Background technique [0002] The Necessity of Leakage Detection In recent years, explosion accidents caused by leakage of gas pipelines have occurred frequently in all parts of the country, and the waste caused by leakage is also staggering (the transmission difference of individual gas companies can reach more than 40%, and they can only rely on charging The account opening fee barely maintains the company's operation) Therefore, finding the leak point, pinpointing the leak point, and repairing it in time can reduce the transmission difference, reduce the operating cost, and prevent problems before they happen. The managers of the vast majority of gas pipelines attach great importance to this, actively take measures, and think of many ways. However, gas leakage has its own characteristics, and it is not easy to ...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the pipeline network buried underground in cities is relatively dense, and signal transmission and interference will inevitably occur between pipelines, which obviously increases the difficulty of distinguishing target pipelines from non-target pipelines. It is also difficult to achieve accurate and reliable depth measurement

This will greatly increase the risk of accurately locating the leak point

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