DEVICE THAT PROVIDES FOR UNIMPEDED PASSAGE OF DEFECTOSCOPE THROUGH EQUAL TEE-PIPE Russian patent published in 2008 - IPC G01N27/82 F17D5/06 

FIELD: measuring techniques; non-destructive testing.

SUBSTANCE: device consists of hermetic container, elastic front sealing ring, elastic rear sealing ring with drain ports, search units, odometer discs, power-supply sources and recording equipment located inside a thermo-container. There are valves on the drain ports on the rear sealing ring that close part of the ports in the direction of the incoming gas. There are springs on the valves. The springs provide for an on-state of the valves when a pressure fall, formed in the pipe, is applied on the rear sealing ring. When passing through the front sealing ring on the lateral outlet of the tee-pipe, springs allow for closing the valves.

EFFECT: unimpeded passage of a defectoscope through an equal tee-pipe in branched gas pipes with low and irregular gas flow.

2 dwg