PIPE SEALING PLUG Russian patent published in 2012 - IPC F16L55/10 

FIELD: machine building.

SUBSTANCE: plug includes flower-type collet clamp including external and friction internal surface contacting the external pipe surface, cylindrical housing with cover plate and sealing element, which adjoins external pipe surface. Spiral thread with profile in the form of in-series connected collets is located on external surface of flower-type collet clamp. Thread is conjugated to profile of internal surface of cylindrical plug housing, which repeats the profile of spiral thread on external surface of collet clamp.

EFFECT: possibility of preventing the plug offset along the pipe at high pressure and the pipe deformation at low pressure.

2 cl, 1 dwg