CONNECTION OF PART OF PIPELINE VALVES WITH PIPE FROM POLYMER MATERIAL, AND PART OF PIPELINE VALVES FOR IT Russian patent published in 2013 - IPC F16L19/00 F16L47/00 

FIELD: machine building.

SUBSTANCE: connection includes a branch pipe made on a rigid housing of a straight fitting, a thin-wall sleeve with outward flanging on one of the ends, which is located inside the connected pipe end from polymer material so that the flanging is borne against the pipe end, a coupling nut, a clamping sleeve and a sealing ring. The branch pipe has a section of external thread and an internal hole with cylindrical surface, an internal step perpendicular to the axis, as well as an inner conical surface facing a free end of the branch pipe and open on the side of the free end of the branch pipe. The coupling nut has an internal radial annular projection with a conical surface facing inward the cavity of the coupling nut and located along the inner edge of the annular projection. Clamping sleeve 8 is made from metal alloy with a solid shape in the direction of the surfaces that form it and installed so that it is adjacent to outer surface of the pipe end and pipe end 5 is introduced into the material.

EFFECT: higher reliability of the connection.

7 cl, 2 dwg