Pipeline defect scanning device

Abstract

The invention discloses a pipeline defect scanning device. The scanning device comprises four flexible shaft driving units, a scanning track adjusting mechanism, a permanent magnetic adsorption mechanism and an adjustable probe mechanism, wherein each flexible driving unit consists of a motor, a flexible shaft, a flexible shaft sleeve, a vehicle wheel group and a coupler; the scanning track adjusting mechanism consists of four vehicle wheel groups and a connecting plate; the permanent magnetic adsorption mechanism consists of two permanent magnet groups with opposite polarities and an armature; the magnetization directions of the magnets are perpendicular to the axis direction of a pipeline; the adjustable probe mechanism is a secondary adjusting mechanism, and a flat probe is used. A peripheral magnetization method is adopted for the device, and the longitudinal defects of the pipelines can be detected; the adjustable flat probe can be adaptive to the scanning of pipelines with multiple specifications; the device is adjustable in scanning track, novel in drive mode, compact in structure, small in size, light in weight, and can be widely applied to the defect scanning of pipelines.

Description

technical field [0001] The invention belongs to the field of non-destructive testing equipment, and in particular relates to a device for scanning pipeline defects by applying the principle of magnetic flux leakage testing. Background technique [0002] Pipelines play an extremely important role in industrial production and people's normal life, and are fully used in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Pipelines are affected by temperature, medium, stress and environment during long-term operation, which will cause corrosion and material deterioration. If effective monitoring or maintenance is not carried out, it will cause great losses to the enterprise. More importantly, pipeline leakage and explosion will cause great pollution and harm to the environment. [0003] The patent document with the publication number CN 1745985A discl...

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Problems solved by technology

The patent document with the publication number CN103712066 A discloses a kind of external magnetic flux leakage detection device suitable for industrial pipelines in use, which adopts the axial magnetization method and can only detect transverse defects, and because the axial magnetization method is adopted, in order to To adapt to the detection of pipelines of different specifications, it is necessary to replace the arc probes of different specifications, which is inconvenient to operate

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