Pipe joint and related method

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 21/035 (2006.01) F16J 15/02 (2006.01) F16J 15/06 (2006.01) F16L 47/06 (2006.01)

Patent

CA 2724458

A pipe joint for plastic pipe includes a bell member (10) and a spigot member (50). The bell member includes a tubular plastic body wall having a radially outer side including a pair of spaced apart circumferentially extending ribs (208,210) and a metal reinforcement ring (212) located between the ribs. The tubular plastic body wall includes a circumferential plastic ring portion (214) extending between the ribs and radially exterior of the metal reinforcement ring to encase the metal reinforcement ring within the tubular plastic body wall. A radial gap may be provided between the plastic ring portion and the metal reinforce-ment ring to accommodate differing thermal shrinkage rates as between the two different materials. The spigot member, which is insertable into the bell member, includes a tubular plastic body wall having an internal surface and an external surface (58) and a longitudinal axis and metal reinforcement (74) encased within the tubular plastic body wall. A plurality of plastic ribs (64,66,68) extend from the external surface of the tubular plastic body wall and form a gasket channel.

L'invention porte sur un joint pour tube plastique comprenant un élément femelle et un élément mâle. L'élément femelle comporte une paroi de corps tubulaire en plastique dont le côté extérieur présente une paire de nervures circonférentielles espacées et un anneau de renfort métallique situé entre les nervures. La paroi de corps tubulaire en plastique présente un anneau circonférentiel en plastique s'étendant entre les nervures et radialement à l'extérieur de l'anneau de renfort métallique pour enchâsser ce dernier dans le corps tubulaire en plastique. On peut prévoir un espace radial entre l'anneau en plastique et l'anneau de renfort métallique pour tenir compte de la différence des coefficients de retrait thermique entre les deux matériaux. L'élément mâle insérable dans l'élément femelle comporte une paroi de corps tubulaire en plastique présentant une surface intérieure, une surface extérieure, un axe longitudinal et un renfort métallique enchâssé dans ladite paroi. Plusieurs nervures en plastique s'étendant de la surface extérieure de la paroi de corps tubulaire en plastique forment un canal du joint.

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