Method for monitoring leakage of oil conveying pipeline

Abstract

The invention discloses a method for monitoring leakage of an oil conveying pipeline. The method is characterized in that an optical cable is arranged near the oil conveying pipeline, and a layer of oil absorption expansion rubber coats the outer side of the optical cable; the optical cable is connected with an optical fiber vibration monitoring host or a stress monitoring host; when the oil leakage of the oil conveying pipeline is carried out, leaked oil is absorbed by the oil absorption expansion rubber, the oil absorption expansion rubber is expanded after oil absorption, the internal optical cable is extruded, vibration or stress changes are formed and monitoring by the optical fiber vibration monitoring host or the stress monitoring host connected to the optical cable. The method hasthe advantages that oil absorption expansion of the optical cable can be caused during leakage for the medium in the oil conveying pipeline no matter the heated oil product or the room-temperature oilproduct, wherein vibration or stress signals in the process are detected by the monitoring hosts to give an alarm.

Description

technical field [0001] The invention relates to the technical field of pipeline leakage monitoring, in particular to a method for monitoring oil pipeline leakage. Background technique [0002] The existing pipeline leakage monitoring method based on communication optical cables uses distributed optical fiber sensing technology, uses optical cables as sensors and signal transmission media, and realizes real-time sensing and detection of the entire line, and uses the principle of optical time domain reflection to reach the meter level positioning effect. [0003] One-core or multi-core optical fiber connected to the communication optical cable by the monitoring host, and one or all of the following two physical quantities are monitored in real time for leakage monitoring: [0004] 1. Monitor the temperature distribution of the optical fiber. When the heated oil pipe leaks, the temperature of the optical fiber near the leak point will rise, so that the system can detect the le...

AI Technical Summary

Problems solved by technology

This method can only be used when the leakage point of the high-pressure oil pipeline is large and can introduce obvious vibration near the leakage point. If the pipeline pressure is low, or the leakage point is small and the leakage is slow, there will be almost no vibration signal, and the sensing fiber cannot be used. leak detected

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