Sensing type grenade probe for blind hole magnetic powder flaw detection

Abstract

The invention discloses a sensing type grenade probe for blind hole magnetic powder flaw detection. The sensing type grenade probe comprises a hollow probe body and a handle, wherein a core rod is arranged in the probe body, a magnetized coil is arranged on the core rod and the handle is arranged at one end of the probe body. By connecting the sensing type grenade probe with various magnetic powder flaw detection devices, the surface or near surface of a blind hole of a work piece can be conveniently magnetized and the flaw at the inner surface of a blind hole forging piece can be detected; the sensing type grenade probe can extend into an inner hole of a forging piece of the oil gas drilling industry, so as to conveniently magnetize the surface of the inner hole and detect the surface flaw; the sensing type grenade probe is particularly convenient to detect the flaw in the inner surface of a blind hole.

Description

technical field [0001] The invention relates to an induction type grenade probe for blind hole magnetic powder flaw detection. Background technique [0002] At present, the magnetization methods of magnetic particle flaw detection at home and abroad mainly include energization method, rod piercing method, coil method, yoke method and so on. For irregular workpieces, especially workpieces with inner holes, coils or magnetic rods are usually passed through the inner holes to form a loop and generate an induced magnetic field on the surface of the inner hole. Magnetic field leakage detects defects. However, for the blind hole forgings in the oil and gas drilling industry, the surface defects of the inner hole are not straight through holes, and the coils or magnetic rods usually used cannot perforate to form a loop, so it is difficult to magnetize the inner surface of the blind hole to form an induced magnetic field. Surface defects in inner holes of hole forgings are often ...

AI Technical Summary

Problems solved by technology

However, for the blind hole forgings in the oil and gas drilling industry, the surface defects of the inner hole are not straight through holes, and the coils or magnetic rods usually used cannot perforate to form a loop, so it is difficult to magnetize the inner surface of the blind hole to form an induced magnetic field. Surface defects in inner holes of hole forgings are often not detectable by magnetic particle inspection

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