DEVICE FOR SURVEYING THE INTERNAL PIPE SURFACE Russian patent published in 2019 - IPC F16L55/32 F16L101/30 G01N21/954 

FIELD: measuring equipment.

SUBSTANCE: device relates to measuring devices and can be used to examine the inner surface of the pipe in the presence of oscillatory movements of the pipe. Device includes a housing in which equipment is installed to perform a survey of the pipe, equipped with two nodes of radial struts, each of which includes four radial struts, and a roller is installed on the outer tip of each strut. In this case, the rollers on at least one radial strut of each node of the radial strut have an electric drive, and on at least two adjacent radial struts of each node of the radial struts there is a pressure shoe, a pressure shoe mechanism and a spring. In this case, the pressure shoe includes a metal plate with a through cut in the middle part, centered relative to the axis of the radial strut and mounted with the possibility of moving along it up to the pressure against the inner wall of the examined pipe.

EFFECT: ensuring accuracy when performing a survey of the inner surface of the pipe in the presence of oscillatory movements of the pipe being examined, such as induced vibration from nearby equipment or sea rolling.

1 cl, 1 dwg