Monitoring and positioning device for leakage of gas delivery pipe

Abstract

The invention relates to a monitoring and positioning device for leakage of a gas delivery pipe. The monitoring and positioning device comprises a monitoring host, a monitoring extension set and piezoelectric ceramic sensors, wherein the piezoelectric ceramic sensors are arranged at two ends of a gas pipe, the monitoring extension set is connected with the monitoring host in a communication way, a GPS (global positioning system) antenna is installed on the monitoring extension set, the piezoelectric ceramic sensors are arranged on gas pipes at the initial station and the terminal station, a signal amplifier is connected at the rear end of the piezoelectric ceramic sensor, the signal output end of the signal amplifier is connected with a data acquisition card of the monitoring extension set, and the audio receiving frequency of the piezoelectric sensor is 0.1Hz-10Hz. The monitoring and positioning device can sample and distinguish infrasonic wave of frequencies of 0.1Hz-10Hz in the gas pipes and are used for online monitoring on gas leakage. Proved by practice, the accuracy of the device on judging leakage can reach more than 98 percent; and compared with existing leakage monitoring devices, the device has considerable progress no matter in distinguishing efficiency or feasibility.

Description

technical field [0001] The invention relates to a natural gas pipeline leakage location device which can monitor pipeline leakage online and determine the specific location of the leakage when a natural gas transmission pipeline leaks or is stolen, and belongs to the safety equipment that must be installed in gas production fields or gas transmission pipelines. field of monitoring equipment. Background technique [0002] During the long-term operation of natural gas pipelines, cracks and trachoma occur due to their own material defects, rot occurs due to corrosion, cracks occur due to external damage, and gas leakage occurs due to gas theft, causing great losses to economic construction and extremely serious damage to safe operation. serious damage to the surrounding environment. For a long time, a lot of manpower and material resources have been invested in the research of online monitoring devices for natural gas pipeline leakage at home and abroad. Some tertiary institu...

AI Technical Summary

Problems solved by technology

The detection sensitivity of this kind of leakage alarm is low, it is easy to be interfered, and the detection distance is short. Therefore, it is necessary to distribute sensors along the pipeline at intervals, and it is necessary to drill holes in the transportation pipeline for installation. This kind of installation and transformation is very dangerous, so this scheme has not been implemented so far

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