Intelligent distributed pipeline state monitoring system

Abstract

The invention belongs to the structural health monitoring field and relates to a system monitoring whether a pipeline leaks or is blocked or not in real time. An intelligent monitoring system comprises pipeline state monitoring devices, signal acquisition modules, signal transmission modules, power supply modules and data analysis display modules, wherein sensors in the pipeline state monitoring devices are buried in the inner walls of the monitoring devices, and three or more pipeline monitoring systems are buried in the pipelines between pump stations and used for monitoring the pressure of fluid conveyed by the pipelines to the pipeline walls, the fluid temperature and the flow state in real time. An information analysis system carries out analysis operation according to acquired sensor signals, judges whether the signals are abnormal or not, judges whether leakage or blockage occurs in the pipelines or not, and feeds analysis results and warning information to monitoring personnel of the pump stations, thereby achieving intelligent monitoring of pipeline health states, positioning breakdown areas more quickly and more accurately and realizing precise maintenance.

Description

technical field [0001] The invention belongs to the field of structural state monitoring, and relates to a distributed pipeline state intelligent monitoring system, which is used for monitoring whether the pipeline works normally and whether there is leakage or blockage failure. Background technique [0002] Pipeline transportation and air, road, railway and water transportation are called the five major means of transportation. Pipeline transportation has the characteristics of good sealing, high degree of automation and good safety performance. It has become the best carrier for oil, gas and water transportation, and plays an increasingly important role in the fields of oil and gas, chemical industry, and people's livelihood. [0003] Since most of the storage and transportation media are high-risk fluids such as crude oil and liquefied gas, once an accident such as oil leakage and gas leakage occurs in the pipeline, the leaked oil and gas can easily lead to major safety a...

AI Technical Summary

Problems solved by technology

In this type of method, since the negative pressure wave method does not require complex pipeline modeling, it can accurately identify and locate the sudden leakage greater than 1.5% of the total flow rate; because the medium in the pipe is flowing, the flowing medium has a certain influence on the sound wave propagation. Attenuation effect, but in the case of single-phase flow and multi-phase flow, its quantitative research is complicated

At the same time, if the viscosity and temperature of the fluid change slowly, in a system with slowly changing parameters, the law of sound wave propagation and attenuation is not very clear

Problems in practical applications, such as the influence of continuous or intermittent bubble groups in the pipeline on sound wave propagation and the nonlinear characteristics of large-value sound wave propagation are not very clear. All of the above problems will affect the propagation of sound wave signals, thus The presence of leak holes cannot be effectively identified

The negative pressure waves generated by tiny leaks are seriously attenuated after long-distance transmission, and the pressure transmitter is not sensitive to it. The effect of this method is not obvious for tiny leaks, and false alarms often occur

In summary, the existing devices for detecting oil pipeline leakage quantification and location have the problems of high cost, time-consuming, and easy to be affected by the surrounding environment, so a new pipeline condition monitoring system is needed

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