Remotely operated device for measurement and inspection of pipe inner surfaces or weld preparations has an emergency release mechanism that prevents it becoming locked in a pipe during inspection

摘要

Device comprises a cylindrical manipulation body (30), a bearing for a longitudinally extendible shaft (24) and a drive for extension of said shaft in the longitudinal direction. Device also comprises a measurement head (22) supported on the shaft, a locking device (28) for support of the manipulation body using a number of support elements and an emergency discharge device for separating measurement head from shaft and locking device from manipulation body.