Piezoelectric energy harvester used for pipeline airflow detection system

Abstract

The invention relates to a piezoelectric energy harvester used for a pipeline airflow detection system, and belongs to the technical fields of new energy and pipeline monitoring. A housing body is mounted on an inner wall of a pipeline through a web plate. A seat plate of a bracket is mounted at an end part of a side wall of the housing body. Inclined mounting surfaces are arranged on ear plates of an upper end and a lower end of the same side of the seat plate. A bottom plate of a half shaft is mounted at end parts of the ear plates of the bracket. A left end and a right end of a cam body ofan exciter are respectively provided with a guide pin and a guide hole, and an upper side and a lower side are provided with multiple cams. Cam surfaces are composed of bottom surfaces, inclined surfaces and top surfaces which are sequentially connected. The guide hole of the exciter is arranged on the half shaft in a sleeving manner, and the guide pin extends out of the seat plate of the bracket.An end part of the guide pin is equipped with a blunt body. A shaft sleeve is arranged at an extending end of the guide pin in a sleeving manner. A support spring and a buffer spring are respectivelyconnected between the seat plate of the bracket and the shaft sleeve and the cam body in a pressing manner. One end of each piezoelectric vibrator is mounted on a mounting surface of the bracket. Jacking blocks mounted at the free ends of the piezoelectric vibrators abut against the cam surfaces. When the exciter is located at a vibration center point, the jacking blocks are in contact with midpoints of the inclined surfaces of the cams.

Description

technical field [0001] The invention belongs to the technical field of new energy and oil and gas pipeline monitoring systems, and in particular relates to a piezoelectric energy harvester used in a pipeline airflow detection system. Background technique [0002] During the operation of oil and gas pipelines, oil and gas pipeline leakage incidents occur frequently due to natural corrosion, force majeure of nature, especially man-made theft, which not only caused huge economic losses, but also caused serious pollution to the surrounding natural environment. In the past, it was maintained by manual inspection methods, but because the pipeline laying distance is long, and it is often in an inaccessible or inconvenient place, it is difficult to detect leakage in time and repair it in time, so people have proposed various types of pipeline leakage monitoring or anti-theft systems. , some technologies are relatively mature; but the power supply problem of the oil and gas pipeline ...

AI Technical Summary

Problems solved by technology

[0002] During the operation of oil and gas pipelines, due to natural corrosion, natural force majeure, especially man-made theft, oil and gas pipeline leakage incidents occur from time to time, which not only caused huge economic losses, but also caused serious pollution to the surrounding natural environment.

In the past, it was maintained by manual inspection methods, but because the pipeline laying distance is long, and it is often in an inaccessible or inconvenient place, it is difficult to detect leakage in time and repair it in time, so people have proposed various types of pipeline leakage monitoring or anti-theft systems. , some technologies are relatively mature; but the power supply problem of the oil and gas pipeline monitoring system has not been well resolved: the cost of laying cables is high and it is easy to be cut off by criminals, which will affect the normal operation of the monitoring system. Frequent replacement, once the battery is low and not replaced in time, the remote transmission of monitoring information cannot be completed

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