DEVICE FOR SEALING AND CLEANING PIPELINES Russian patent published in 2007 - IPC F16J15/00 F16L55/12 

FIELD: pipeline engineering.

SUBSTANCE: device comprises two flanges with guiding bushings and flexible shell made of cylindrical member and two face members made of a rubber material. The flanges are mounted in the face sections of the shell and are interconnected by means of the sections. The flange bushings receive branch pipe that define a ring pressure-tight space together with the shell. The space is in communication with the source of fluid or compressed gas through the connecting pipe. The branch pipe is welded to the flange bushings. The sides of the flange are defined by the plane surface arranged perpendicular to the axis of the shell and conical surface with a cone angle from 130° to 176°. The guiding bushing is mounted from the side of the flat surface of the flange, and the thickness of the rubber-cord shell that embraces each of the flanges from their flat surface is twice as much as that from the side of the conical flange surface.

EFFECT: simplified structure.