Large-diameter metal round tube defect detecting device and method

Abstract

Provided are a large-diameter metal round tube defect detecting device and method. The device comprises a clamp, electrical vortex sensors, a locating device and a signal processor. The clamp comprises an annular metal disc, the hollow part of the annular metal disc is fixedly connected with a metal cylinder, a pair of rollers is symmetrically mounted on the inner wall of the metal cylinder in the radial direction of the metal cylinder, and a plurality of air cylinders are evenly mounted on the surface of the annular metal disc in the radius direction of the annular metal disc. One end of each air cylinder is hinged to the outer wall of the metal cylinder, the other end of each air cylinder is a piston stretching end, and the tail end of each piston rod is provided with the corresponding electrical vortex sensor. The locating device comprises a ball screw, a worm and gear pair, a servo motor and a supporting guide rail, one end of the ball screw is connected with the annular metal disc, and the other end of the ball screw is connected with the worm and gear pair. The worm and gear pair is connected with the servo motor and driven by the servo motor. The electrical vortex sensors are connected with the signal processor. Detecting information on one circumference of a detected pipeline can be obtained at the same time through only one time of testing, the whole pipeline can be subjected to complete scanning detection through only one time of mounting, and the locating, mounting and detecting efficiency is high.

Description

technical field [0001] The invention relates to the field of pipeline defect detection, in particular to a large-diameter metal round pipe defect detection device and detection method. Background technique [0002] Large-diameter metal round pipes are one of the important facilities of hydropower plants, thermal power plants, etc. Such as the volute of the water turbine, the boiler of the thermal power plant, the evaporator, the condenser, the thermodynamic cycle of the nuclear power plant, etc. If there are defects in their pipe walls and welds, it is very easy to cause major accidents, so regular inspection and maintenance are required. Due to the large diameter of the pipes of these devices, the workload and efficiency are extremely low during comprehensive inspection, which is extremely inconvenient for sensor positioning and operation. Therefore, it is necessary to develop a convenient and effective detection device and detection method for large-diameter metal pipes....

AI Technical Summary

Problems solved by technology

If there are defects in their pipe walls and welds, it is very easy to cause major accidents, so regular inspection and maintenance are required

Due to the large diameter of the pipes of these devices, the workload and efficiency are extremely low during comprehensive inspection, which is extremely inconvenient for sensor positioning and operation

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