Rotary joint for stationary siphon

Claim 1

In an assembly including a frame, a roll having an axial end and an inner wall defining a cavity into which steam is introduced and which s rotatably supported by said frame, a stationary siphon extending from said cavity to discharge therefrom drain resulting from condensation of said steam, and a rotary joint for enabling relative rotation between said roll and said siphon, the improvement comprising: said rotary joint including a main body fixed to said axial end of said roll and rotatable therewith; a supporting pipe for introducing steam into said cavity, said supporting pipe being nonrotatably fixed to and supported by said frame, and said supporting pipe extending through said main body to said cavity; said stationary siphon comprising a siphon line extending through said supporting pipe and being firmly and nonrotatably supported thereby, said siphon line having an inner end extending to a position adjacent said inner wall of said roll; said rotary joint further including a tubular member sealingly mounted on the outer periphery of said supporting pipe, said tubular member being movable axially of said supporting pipe and immovable circumferentially thereof, said tubular member having a portion shaped as a part of a sphere; a seal member interposed between a surface of said main body and said spherical portion of said tubular member; and means urging said spherical portion of said tubular member into sealing engagement with said seal member and said seal member into sealing engagement with said surface.