SHAPED SECTION OF SEWER PIPE-LINE Russian patent published in 2002 - IPC

FIELD: construction of systems of building sewer pipe-lines made of polymeric materials. SUBSTANCE: the shaped section has a pipe of polymeric material with a hub made with annular beads on the outer surface and an annular broadening on the side of the end for accommodation of a gasket. In the point arrangement of the gasket the hub on the external side is made with a tapered side surface, the cavity of its annular broadening is made open from the end and restricted by a detachable cover having a central cover with a tapered side surface corresponding to the indicated taper of the hub, limited in the lesser diameter by an annular surface, whose inside diameter is not less than the pipe diameter outside the hub, an in the larger diameter - by an internal annular flange of a segmental cross-section. The section of the tapered side surface of the hub exceeds the depth of gasket arrangement in its annular broadening and forms a groove between the base of the tapered section and the pipe annular bead that is closest to it for arrangement of the annular flange of the detachable cover, the distance between whose annular surface and its annular shoulder exceeds the depth of gasket arrangement. The diameter of the bead forming the groove exceeds the diameter of the bead positioned on the hub at least by the pipe wall thickness in the point of the hub, but not exceeds the larger diameter of the detachable cover having a tapered side surface. The invention is developed in the dependent claims. EFFECT: enhanced reliability of operation, maintainability and improved operating characteristics, improved adaptability to manufacture. 3 cl, 8 dwg