Pipe coupling

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

Patent

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Details

F16L 37/23 (2006.01) F16L 15/00 (2006.01) F16L 21/06 (2006.01) F16L 21/08 (2006.01) F16L 23/02 (2006.01)

Patent

CA 2431693

A coupling for joining and maintaining in close relationship two aligned rods or pipes and to prevent them from separating but which is of reduced outer diameter and weight when compared with conventional couplings, comprising a pair of annular sleeves (13, 14) to be located respectively around a pair of aligned pipe end regions (10, 11) and movable relatively along the latter, ball and ramp arrangements (30, 11) for gripping the outer circumferential surface of the respective pipe end regions, a split sleeve (25) adapted to surround the annular sleeves while being anchored to one sleeve (14) and threadedly engaged on the other sleeve (13) thus, by rotation, to draw the sleeves together to grip the pipe ends. Temporary clamping means comprising split flanges (18, 19, 20, 21) and draw bolts (23) with nuts (24), are provided initially to draw the coupling together, but are removable after the split sleeve (25) has been placed in axial tension.

La présente invention concerne un raccord servant à réunir deux tiges ou deux tuyaux alignés en les empêchant de se séparer, avec l'avantage sur les raccords conventionnels d'un diamètre extérieur et d'un poids réduits. Ce raccord est fait de deux manchons annulaires (13, 14) venant chacun autour de l'une des deux extrémités (10, 11) des tuyaux alignés, et mobiles par rapports à ces mêmes extrémités. Le raccord comporte également des dispositifs d'encliquetage à billes (30, 11) venant enserrer extérieurement le pourtour des différentes extrémités considérées des tuyaux, une chemise fendue (25) conçue pour entourer les manchons annulaires, solidaire d'un manchon (14) et vissée sur l'autre (13) de façon que, par rotation, la traction résultant rapproche l'un de l'autre les manchons de façon à agripper les extrémités des tuyaux. L'invention comprend également des dispositifs de pincement temporaire à base de brides fendues (18, 19, 20, 21) et de boulons de serrage (23) à écrous (24) permettant de serrer le raccord au début, mais que l'on peut retirer une fois que la chemise fendue (25) a été placée en tension axiale.

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