A SEALING DEVICE, A MOULD ELEMENT AND A PIPE

摘要

A sealing device for sealing an annular space between two pipe and portions substantially consisting of concrete. One of the pipe and portions forms a socket having a substantially cylindrical inner surface and the other pipe end portion forms a spigot end which is axially introducible into the socket and has a substantially cylindrical outer surface. The sealing device comprises a sealing ring (52) consisting of an elastic material, preferably rubber, the sealing ring having a sealing portion (56) for sealing the annular space. The sealing device is adapted to be moulded into the socket at the cylindrical inner surface thereof and has means (84) for anchoring the sealing device in the moulded-in position in the socket. The sealing device comprises a mould ring (54) connected with the sealing ring (52) and adapted to be moulded into the socket together with the sealing ring with the sealing ring positioned adjacent the free end of the socket and the mould ring positioned axially inside the sealing ring. The mould ring provides the required receiving space for the sealing portion (56) of the sealing ring (52) when the spigot end is introduced into the socket and provides also the required space of movement for the spigot end introduced into the socket. The invention relates also to a moulding tool, a so called base ring, to be used when moulding a sealing device into a socket of a pipe end portion, and a pipe having a socket provided with a sealing device according to the invention.