Intelligent pipeline flow velocity monitor

Abstract

The invention relates to an intelligent pipeline flow velocity monitor, and belongs to the field of fluid monitoring. An inner tube in a pipeline is divided into a left cavity and a right cavity by a separator plate. The left cavity is internally provided with a circuit board, and the end portion thereof is equipped with a left end cover; left and right half shafts of a pin shaft are sleeved by a buffer spring and a balance spring respectively; the left half shaft extends out of the left end cover, and the end portion thereof is equipped with an exciter; the right half shaft extends into the right cavity from the separator plate; a right end cover enables two outer frames and at least one inner frame to be pressed in the right cavity; a metal substrate is pressed between the adjacent inner and outer frames and between the inner frames; a cantilever beam of each metal substrate is bonded with a piezoelectric wafer to form a piezoelectric vibrator, and the other end of the cantilever beam is fixed to the right half shaft; and one side of each outer frame and the two sides of each inner frame are provided with a limit surface and a sediment groove. The advantages are that power generation and flow velocity automatic measurement are realized synchronously through a coupling effect, and thus online monitoring of the flow velocity can be realized in a true sense; the monitor, configured along the length direction of the pipeline, is simple in structure and small in radial dimension, and can obtain required energy through the multiple piezoelectric vibrators easily; and each piezoelectric vibrator is reasonable in structure, large in generated energy and high in reliability.

Description

Technical field [0001] The invention belongs to the technical field of pipeline fluid monitoring, and specifically relates to an intelligent pipeline flow velocity monitor. Background technique [0002] Due to natural corrosion, natural force majeure, and man-made theft, leakage of oil and natural gas and other fluid long-distance pipelines occurs from time to time during use. Frequent pipeline leaks not only cause huge economic losses, but also cause natural surroundings. The environment has caused serious pollution. In the past, regular manual inspections were often used for maintenance. However, due to the long laying distance of oil and gas pipelines and often in inaccessible or inconvenient places, it is difficult to find leaks and maintain them in time for regular inspections. Therefore, many types have been proposed for pipeline leakage monitoring or anti-theft systems. Although some of the proposed pipeline leakage or anti-theft monitoring and alarm methods are relative...

AI Technical Summary

Problems solved by technology

Although some of the pipeline leakage or anti-theft monitoring and alarm methods proposed are relatively mature at the technical level, the application of the anti-theft monitoring system for long-distance pipelines in China is still in the preliminary stage and has not been widely used. One of the main reasons is that The power supply problem of the monitoring system has not been well resolved: 1) The method of laying cables is expensive and is easily cut off by criminals, which affects the normal operation of the monitoring system; 2) When using batteries for power supply, the use time is limited and needs to be replaced frequently. Once the battery is insufficient and not replaced in time, the remote transmission of monitoring information cannot be completed; 3) In recent years, in order to meet the self-power supply requirements of related wireless sensor monitoring systems, people have also proposed various forms of turbine-type miniature power generation devices. The biggest problem is that the structure is complex and the volume is relatively large, which is not suitable for occasions with small diameter pipes. Some structures of power generation devices also have electromagnetic interference and other phenomena, and their popularization and application have been restricted to a certain extent.

Images