A pipeline flow state monitoring device

Abstract

The invention relates to a monitoring device for a pipeline flow state and belongs to the field of fluid monitoring. A disturbance fluid and an inner cylinder are installed on the inner wall of a pipeline by rib plates, and an inner cylinder baffle plate divides the inner cylinder into a left chamber and a right chamber; a circuit board with an emission unit is installed inside the left chamber, a left end cap is installed on the end part, and a pressure and temperature sensor is installed on the left end cap; a pin shaft is divided by a pin shaft shoulder into a left half shaft and a right half shaft, and the left and right half shafts are sleeved by a buffer spring and a balance spring respectively; the left half shaft stretches out via a center hole of the left end cap, and an exciter is installed on the end part; and the right half shaft stretches into the right chamber via a guide hole in the baffle plate and is equipped with piezoelectric vibrators, and the mass of a ring frame on the outer edge of each piezoelectric vibrator is different. The device has the advantages that electricity is generated through coupling between the disturbance fluid and the exciter, and a fluid, real-time online monitoring in the real sense can be achieved; the monitoring device is configured along the length direction of the pipeline, the structure is simple, the radial size is small, and a generating capacity and a bandwidth can be increased easily through synchronous work of the multiple piezoelectric vibrators; and the structure of the piezoelectric vibrators is rational, energy conversion efficiency is high, and the generating capacity is high.

Description

technical field [0001] The invention belongs to the technical field of fluid flow state monitoring, and in particular relates to a pipeline flow state monitoring device. Background technique [0002] Due to natural corrosion, natural force majeure, and man-made theft, leakage events of long-distance pipelines for oil and natural gas and other fluids during use occur from time to time. Frequent pipeline leakage not only causes huge economic losses, but also affects the surrounding nature. 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 the fact that they are often located in inaccessible or inconvenient places, regular inspections are difficult to find leaks and maintain them in time. Therefore, various types have been proposed for pipeline leakage monitoring or anti-theft systems. Although some of the pipeline leakage or anti-theft mo...

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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.

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