FIELD: measurement.
SUBSTANCE: invention relates to non-destructive testing of condition of buried main pipelines. Main pass-through magnetic flaw detector comprises a cylindrical base, a magnetization system, an information pickup system containing magnetic field sensors, power supply unit, information collection and processing unit, flaw detector movement speed meters and the transported gas passage opening cross-section changing unit, including the gas bypass unit, the regulator and the drive, wherein gas bypass unit is composed of blade diaphragm with varying opening angle between blades and passage opening there between depending on speed variation.
EFFECT: maintaining optimum speed of projectile depending on speed of gas movement.
1 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PIPELINE MOVABLE MAGNETIC FLAW DETECTOR | 2006 |
|
RU2303779C1 |
| MAGNETIC WALL FLAW DETECTOR | 1998 |
|
RU2144182C1 |
| DEVICE TO CONTROL PIPELINE WALLS | 2011 |
|
RU2453835C1 |
| MAGNETIC GOING-THROUGH FLAW DETECTOR | 2000 |
|
RU2176081C1 |
| INTRAPIPE MAGNETIC FLAW DETECTOR | 2000 |
|
RU2176082C1 |
| PIG-DEFECTOSCOPE WITH VARIABLE SPEED OF MOVEMENT | 2008 |
|
RU2361198C1 |
| IN-TUBE FAULT DETECTION DEVICE WITH CONTROLLED MOVEMENT SPEED | 2008 |
|
RU2395750C2 |
| METHOD FOR MAGNETIC INSPECTION OF INTERIOR PROFILE OF PIPELINES AND DEVICE FOR REALISING SAID METHOD | 2007 |
|
RU2393466C2 |
| PIG-FLAW DETECTOR WITH BACKUP FLAW SENSORS AND ODOMETRES | 2009 |
|
RU2406082C1 |
| IN-TUBE INSPECTION SHELL-DEFECTOSCOPE WITH CONTROLLED MOVEMENT SPEED | 2008 |
|
RU2369783C1 |
