Piezoelectric vibration-type pipe flow generator

Abstract

The invention relates to a piezoelectric vibration-type pipe flow generator, which belongs to the field of fluid power generation and pipeline monitoring. The inner wall of the pipeline is provided with an inner cylinder; the outer side of the bottom wall of the inner cylinder is embedded with fixed magnets, and ear plates are arranged; the left end cover of the inner cylinder wall is provided with two groups of piezoelectric vibrators and an excitation reed; each piezoelectric vibrator group at least comprises two piezoelectric vibrators whose end parts are loaded with levitated magnets; the excitation reed is loaded with levitating magnets and an excited magnet; the levitating magnets and the levitated magnets are arranged with like magnetic poles arranged oppositely; the substrate of the piezoelectric vibrator is arranged close to the excitation reed; the excited magnet and the fixed magnet are arranged with opposite magnetic poles arranged oppositely; the exciter is arranged on the ear plate through a pin shaft, and an exciting magnet on a swinging arm of the exciter and the excited magnet are arranged with opposite magnetic poles arranged oppositely; and one end of a balance reed is arranged on a ribbed slab and the other end is arranged on the connection plate of the swinging arm. The piezoelectric vibration-type pipe flow generator has the advantages that a multi-degree-of-freedom system is realized, and the frequency band is wide; the piezoelectric vibrators are not contacted with the fluid, a piezoelectric plate only bears compressive stress, the fixed magnet can realize amplification and limiting, the reliability is high, and the power generation amount is large.

Description

technical field [0001] The invention belongs to the technical field of pipeline fluid power generation and pipeline monitoring, and in particular relates to a piezoelectric vibration type pipeline flow generator. Background technique [0002] Due to corrosion, natural force majeure, and human theft, long-distance pipelines for long-distance fluids such as oil and natural gas often leak during use. Frequent pipeline leakage not only causes huge economic losses, but also causes damage to the surrounding natural environment. severe 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 the fact that they are often located in inaccessible or inaccessible places, it is difficult to detect leaks and maintain them in time by manual inspections. Therefore, various types have been proposed for pipeline leakage monitoring and anti-theft systems. Although some of the pipeline fluid leak...

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Problems solved by technology

Although some of the pipeline fluid leakage and 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 my country is still in its infancy and has not yet been widely used. One of the main reasons is that monitoring The power supply problem of the system has not been well solved: ①The 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; ②The battery power supply has a limited service life and needs to be replaced frequently. It is also impossible to complete the remote transmission of monitoring information

In recent years, in order to meet the self-power supply requirements of related wireless sensor monitoring systems, people have proposed various forms of turbine-type micro-fluid power generation devices. The biggest problem is that the structure is complex and the volume is relatively large, which is not suitable for pipelines with small diameters. In some occasions, some structures of power generation devices still have electromagnetic interference and other phenomena, and their popularization and application are restricted to a certain extent.

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