DEVICE FOR DETECTING LEAKAGE IN PIPELINES Russian patent published in 2016 - IPC F17D5/04 G01M3/16 

FIELD: measurement technology.

SUBSTANCE: invention relates to devices for detecting leakage of a water heat carrier in heat-insulated pipelines, closed by a protective casing. Device comprises a metal protective casing, coaxially arranged with annular gap 1 on metal tube 2, made of four metal sheets 4 arc-curved across tube 2. Rectilinear edge of sheets 4 are connected to each other by means of a dielectric spacer, and arc-shaped edges 9 of sheets 4 are connected to each other by means of dielectric ring 10. At ends 15 and 16 of ring 10 there are circular grooves 17 and 18 for placing arc-shaped edges 9 of sheets 10. Electric connectors in the form of lamellae for fixation of the arc-shaped edge 9 of sheet 4 are mounted opposite to each arc-shaped edges 9 of sheets 10 in circular grooves 17 and 18. Electric contact terminals 30 are fixed on external surface 22 of ring 10 and separately connected to each lamella. Measuring instrument 33 is connected to contact terminal 31 of metal pipe 2 by means of electrical conductors 32 and to contact terminals 30 of ring 10 for determining electrical resistance of heat insulation 3 located in annular gap 1.

EFFECT: high accuracy of determining leakage point, simplified maintenance of heat-insulated pipelines.

4 cl, 8 dwg