Probe mechanism of oil and gas pipeline crack detector

Abstract

The invention discloses a probe mechanism of an oil and gas pipeline crack detector. The probe mechanism of the oil and gas pipeline crack detector comprises a signal excitating and acquiring mechanism, wherein a spring connecting rod supporting mechanism and a spring slide block supporting mechanism are connected at the front end and the back end of the signal excitating and acquiring mechanism through universal rotating mechanisms respectively; the spring connecting rod supporting mechanism and the spring slide block supporting mechanism are fixedly arranged on a framework of the crack detector; the signal excitating and acquiring mechanism comprises a long arm-shaped connecting base body; transversely arranged supporting wheels are pivoted on the upper parts of the front end and the back end of the connecting base body; an iron core is arranged on the connecting base body; a probe shell assembly is arranged above the iron core and on the middle part of the connecting base body; the front part and the back part of the probe shell assembly are pivoted on the iron core through a front probe arm and a back probe arm respectively; an exciting circuit assembly fixed on the iron core is arranged below the probe shell assembly; magnets are arranged between the probe shell assembly and the front and back supporting wheels respectively; and steel brushes are arranged above the magnets. The probe mechanism of the oil and gas pipeline crack detector is always tightly adhered to the inner wall of a pipeline while passing through a welding seam of the pipeline, so that the detection precision and the sensitivity of the detector can be improved.

Description

Technical field [0001] The invention relates to pipeline crack measurement and pipeline system non-destructive detection technology, in particular to a probe mechanism of an oil and gas pipeline crack detector. Background technique [0002] In recent years, my country's long-distance oil and gas pipelines have developed rapidly, and pipeline operations and management are facing severe challenges. Pipeline leaks due to pipeline corrosion, wear, accidental damage and other reasons often occur. The current safety hazards caused by stress corrosion cracks make pipeline owners face new challenges. Especially at present, the transmission pressure of gas pipelines is getting higher and higher, and the displacement is getting bigger and bigger. When the cracks in the pipeline reach certain conditions, they will rapidly expand and cause pipe burst accidents, and the pipeline will be destroyed hundreds of meters or even thousands of meters instantly. Meter. There have been accidents invo...

AI Technical Summary

Problems solved by technology

[0003] At present, the crack detectors owned by foreign pipeline inspection companies mainly use electromagnetic ultrasonic transducers, conventional ultrasonic crack detection and transverse magnetic field and other technical means, while there is no effective online detection technology for long-distance pipeline cracks in China

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