Swivel joint construction for pressure containing conduit

Pipe joints or couplings – With fluid pressure seal – Swivel with flange in socket

Patent

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Details

285111, 285281, 285373, 285351, F16L 2700

Patent

active

039971988

ABSTRACT:
A swivel joint for pressure containing conduits such as movable flow lines may comprise a pair of hub elements each having means establishing interconnection with a section of flow line, the hub elements being abutted in such a manner as to define a flow passage through the swivel joint construction. A thrust flange is formed on each of the hub elements, the flanges being retained within a split housing structure that services to retain the swivel joint in assembly. Rotatable relationship between the hub elements and the body structure is established by a pair of thrust bearings that are interposed between the housing and the respective thrust flanges of the hubs. A lubricating spacer element may be disposed between the thrust flanges of the hubs to prevent the development of friction retardation of swivel movement. The hubs interfit to define a sealed recess within which is received a seal sleeve that is of sufficient length to transition the joint between the abutted hubs. The joint transitioning seal sleeve element corporates with the hub structure to define a pair of opposed seal pockets within which may be received annular primary sealing elements that prevent fluid flowing through the swivel structure from coming into contact with the thrust bearings. Additional annular sealing elements may be retained by the seal sleeve for establishment of secondary seals between the seal carrier and the hubs and further preventing contamination of the bearings by the fluid flowing through the swivel structure. The body structure is provided with lubrication fittings providing for lubrication of the thrust bearings.

REFERENCES:
patent: R18906 (1933-08-01), McGuirk
patent: 904673 (1908-11-01), Bideker
patent: 1885886 (1932-11-01), Banks
patent: 2341449 (1944-02-01), Krone et al.
patent: 2412394 (1946-12-01), Giles
patent: 2421974 (1947-06-01), Vandervoort
patent: 3532364 (1970-10-01), Snyder, Jr.

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