A built-in flow detection device

Abstract

The invention discloses a built-in flow detection device, comprising: an electromagnetic induction module, including a fixed bracket arranged perpendicular to the fluid flow direction in a pipeline to be detected, a cross-structure support arm that divides the fixed bracket into four areas, and a rotating connection The impeller in the center of the support arm of the cross structure and the permanent magnet that can rotate with the impeller, induction coils are respectively embedded in the four areas, and the impeller includes four blades with permanent magnets respectively. When the fluid flows to drive the blades to rotate, the The induction coil can cut the magnetic force line to generate an electric signal; the signal processing module; the charging module. The invention is not connected with the wires outside the pipeline, and uses the built-in accumulator and self-generating charging system to supply power to the fully sealed circuit, which prevents the leakage of pressure gas inside the pipe and the exposure of the electrical connection point to the gas medium caused by the connection of the wire to the pipe wall. It also solves the problem of continuous power supply for long-term use of built-in circuit modules.

Description

technical field [0001] The invention belongs to the field of gas pipeline components, in particular to a built-in flow detection device. Background technique [0002] In the construction of urban gas pipeline network, there are generally two ways to connect pipeline flowmeters for flow detection. One is to select a suitable independent flowmeter during pipeline network construction and weld it into a specific point of the pipeline in series. The ultrasonic flowmeter is connected to the external binding method at a specific point of the pipeline. There are obviously differences in the difficulty of access and subsequent maintenance of the two flowmeters, but the requirements for safe and reliable work are completely consistent. [0003] At present, the urban gas pipeline network has adopted a large number of pipe valve products made of high-density polyethylene (PE), and the change of pipeline material has also put forward new requirements for access flow meters, because PE ...

AI Technical Summary

Problems solved by technology

In the construction of an intelligent gas pipeline network, it is essential to detect the flow, pressure, and temperature of the medium in the pipeline, but PE gas pipelines have extremely high requirements for leakage and explosion protection. The electrical wires are introduced through the pipe wall to prevent gas leakage, which brings difficulties to the continuous power supply and signal transmission of the built-in detection device

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