Restrained pipe joint.

摘要

A bell and plain end pipe joint (2,4) are provided wherein the plain end has a raised portion (8) on its outside diameter. A series of locking segments (20) fit into a circumferential groove (16) in the bell of one pipe and engage both the raised portion on the plain pipe (2) and a portion of the bell (4). Upon an increase in fluid pressure in the pipes, the pipes tend to separate axially and the locking segments (20) also contact and bear against a different portion of the bell. The joint provides a novel means of distributing the axial thrusttending to separate the pipe being joined.