Rotary detector for longitudinal defect of steel pipe

• Main Author: SHIBIN,CHEN CHENG
• Format: Patent
• Language: English
• Published: 20.12.2006
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The utility model relates to a rotary detector for longitudinal defects of steel pipes, which belongs to a lossless inspection device. The utility model comprises a sensor, a signal processing device and a rotary device, wherein the sensor comprises a magnetizer and a signal pick device. The utility model has the difference that the rotary device comprises a main shaft, balance wheels, a flexible supporting mechanism, a lifting mechanism, a driving mechanism, and a signal transmission mechanism; the flexible supporting mechanism is fixedly connected with the lifting mechanism via an adjustable screw, and the two balance wheels are connected into integration via a connecting plate; the signal transmission mechanism is sheathed with the main shaft, the driving mechanism is connected with the main shaft, and the magnetizer is composed of a magnetic shielding cover and 5 to 10 pairs of permanent magnets; the centre distance L of the permanent magnet is less than the diameter of the measured workpiece, the signal pick device is movably arranged in the middle of the magnetizer, and the sensor is arranged in the rotary device via the flexible supporting mechanism. The utility model has the active effects that the utility model can be directly arranged on the existing detector, the investment cost is low, the detecting efficiency is high, the reliability is high, a qualitative analysis and a quantitative analysis for the defect size can be carried out, the utility model is convenient in use, and demagnetization is not required.