钢管磁法高速探伤仪的研制

STUDIES ON STEEL TUBES HIGH SPEED DETECTER

钢管壁承压２０ＭＰａ以上，管子内外壁受油、泥严重污染，管壁上各类缺陷多、危害大。根据对铁磁性钢管施加稳恒磁场和缺陷使通过管壁磁通变化、并在油管表面产生漏磁场的原理形成的钢管高速探伤仪，具有检测钢管内外壁裂纹、腐蚀坑点、通孔等缺陷的功能。其检测速度为１５～５０ｍ／ｍｉｎ；检测灵敏度Ｄ１．０ｍｍ人工通孔；检测直径５０～１５０ｍｍ；操作简单、运行稳定和检测可靠等。

When total pressure on wall of steel tubes is over 20MPa, polluter such as dirt and sand and flaws on the wall may cause serious danger.When a steady and strong enough magnetic flux passes along the tube's wall, flaw in wall can change the flux passing through the wall and form leaking magnetic field.In view of the above, a high speed flaw detector of steel tube is designed and produced.It can detect flaws that in or on tube's wall such as craze,hole,hollow and groove. The detecting speed is 15～50m/min,the detecting ability D1.0 hole,the detecting diameter of tube between 50～150mm. The operation is simple,and detection is steady.