PIPELINE PIG SPEED REGULATOR Russian patent published in 2014 - IPC G01N29/04 

FIELD: machine building.

SUBSTANCE: device to stabilise the travelling speed of a pipeline pig consists of a cylindrical hollow casing, bypass cylindrical passage channels, gas pass-by control unit with axially shifted gates of shutoff valves, the first and the second polyurethane cups, a hydraulic actuator, on-board electronics, odometric device travelling speed meter and electronic control system. It comprises a group of selection flappers and an electrically operated relief valve. The bypass passage channel is made as a cavity in the cylindrical casing of the pipeline pig itself, and the gas pass-by control unit is made as cylindrical casing with a group of vertical slots in the front part and a group of horizontal slots on its cylindrical surface with a cylindrical sliding shutter in its front part which is rigidly connected to the external surface of the sliding pipe moved longitudinally along the external surface of the hydraulic cylinder, as well as other device elements.

EFFECT: provision for the possibility to keep the nominal travelling speed of a pipeline pig with high accuracy in the wide range of speeds of gas or other product transportation.

4 dwg