FIELD: building, particularly for pipeline repairing.
SUBSTANCE: device has rubber-cord casing connected by hose with pressurized gas source, pressure-gauge, three-way valve and hose section detachably connected to casing so that hose section remains inside pipeline after its detachment. Casing is tore-like and encloses sealed cylindrical body in air-tight manner. Arranged on cylindrical body are at least two elastic annular centering supports located coaxially with casing and spaced a distance one from another. The distance is greater than width of under-wedge space of pipeline gate. Outer support diameter is less than inner pipeline diameter, but greater than outer diameter of casing not subjected to pressurized gas pressure. Hose section connected to casing may be automatically retracted into cylindrical body after detachment thereof from hose. Installed on device end is connection mechanism for device engagement with another similar device for their movement inside pipeline.
EFFECT: widened range of technical means.
4 cl, 2 dwg
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