Online pipeline flaw detection device

Abstract

The invention discloses an online pipeline flaw detection device, which comprises a magnetizing mechanism, probes and a creeping mechanism; the magnetizing mechanism comprises two groups of ferromagnetism rings, a U-shaped column and a coil; each group of ferromagnetic rings is formed by two semi-circular ferromagnetism parts and two blocks of semi-circular non-magnetic end plates; the two semi-circular ferromagnetism parts are respectively fixed on the inner sides of the two blocks of semi-circular non-magnetic end plates; one end of one block of non-magnetic end plate is hinged with one end of the other one block of non-magnetic end plate, and the other end of the one block of non-magnetic end plate is connected with the other one end of the other block of non-magnetic end plate through a buckle so as to form one group of closed circular ferromagnetism ring; the two groups of ferromagnetic rings are in parallel with each other at a predetermined interval; the U-shaped column is a ferromagnetism material; an opening end of the U-shaped column is respectively connected with outer diameters of the two groups of ferromagnetism rings; the coil winds at the middle part of the U-shaped column and comprises a direct current input end and a direct current output end; the probes are fixedly connected with the ferromagnetism rings; and the creeping mechanism is fixedly connected with the non-magnetic end plates. The online pipeline flaw detection device can detect an online ferromagnetism pipeline in an installation way of buckling and does not need to detach or disconnect the online pipeline.

Description

technical field [0001] The invention relates to an online pipeline flaw detection device. More specifically, it is a signal detection device for real-time detection of the quality of ferromagnetic industrial pipe fittings on the production, processing and installation sites and on-line petroleum, chemical, and boiler industrial pipes by using the magnetic flux leakage detection method. Whether the pipeline is safe during operation. Background technique [0002] Ferromagnetic pipe fittings are used to form petroleum, chemical, and boiler industrial pipelines, which operate under high pressure, load and high torque, and are continuously affected by corrosive gases, liquids and solids for a long time. If the pipeline contains defects, it may cause major accidents such as pipeline breakage, leakage, explosion and environmental pollution. [0003] The current online industrial pipelines such as petroleum, chemical industry, and boilers are generally shut down for maintenance af...

AI Technical Summary

Problems solved by technology

[0007] 2. Since the distance between the current eddy current testing equipment and the pipeline requires very precise positioning, it cannot automatically crawl along the online industrial pipeline, so it cannot reliably detect the online industrial pipeline;

Its disadvantage is that a special driving device is required to drive the steel pipe to rotate forward, and it is not suitable for non-destructive testing of online pipelines

Since the circular magnetized coil can only be placed on the pipe from the end of the pipe, the device can only detect the removed pipes one by one, and cannot perform online detection

[0013] Therefore, there is still a lack of reliable detection methods and equipment for on-line industrial pipelines such as petroleum, chemical, and boilers.

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