A pipeline flow velocity monitor

Abstract

The invention relates to a pipe flow velocity monitor which belongs to the field of fluid monitoring. The inner wall of the pipe is provided with an inner cylinder through a rib plate. The left chamber of the inner cylinder is provided a circuit board, and an end is provided with a left end cap. A left end rod, which is provided with an exciter, of a force applying rod extends out of the left end cap. A right end rod, which is sleeved by a balancing spring, of the force applying rod is arranged in a guiding hole on a baffle board, and furthermore the end of the right end rod is provided with a buffer pad. A transducer which is composed of a slide carriage and a piezoelectric vibrator is sleeved in a right chamber. The piezoelectric vibrator is obtained through binding a metal substrate and a piezoelectric wafer. An insulating pad is arranged between the adjacent piezoelectric vibrators of two transducers. The piezoelectric vibrators at two ends of the right chamber respectively contact with buffer pads on the right end rod and a right end cap. The pipe flow velocity monitor is advantageous in that a coupling function between the exciter and fluid is utilized for generating electric power and automatic measurement for the flow velocity is realized, and real-time flow velocity monitoring in the true sense can be realized; the components are configured along the length direction of the pipe, thereby realizing simple structure, small radial size, and easy required energy acquisition through multiple transducers; and the piezoelectric vibrator has advantages of reasonable structure, self-protecting function, high power generation amount and high reliability.

Description

technical field [0001] The invention belongs to the technical field of fluid flow state monitoring, in particular to a pipeline flow velocity monitor. Background technique [0002] Due to natural corrosion, force majeure in nature and man-made theft, long-distance oil and natural gas and other fluid pipeline leakage events occur frequently during use. Frequent pipeline leakage not only causes huge economic losses, but also affects the surrounding natural gas. 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, regular inspections were difficult to detect and maintain leaks in time. Therefore, various 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 relatively mature at t...

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 my country is still in the preliminary stage and has not yet been widely applied. 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 power is low 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 micro-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 pipe diameters. Some structures of power generation devices also have electromagnetic interference and other phenomena, and their popularization and application have received certain restrictions.

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