CONNECTOR COUPLING AND METHOD OF REPAIRING POLYMER PIPES IN HARD-TO-REACH PLACES Russian patent published in 2020 - IPC F16L21/00 

FIELD: machine building.

SUBSTANCE: in connection sleeve in polymer housing with embedded part made of brass with protective coating, there is a branch pipe with external thread and with possibility of axial movement and rotation relative to coupling housing. To ensure tightness of connection between coupling housing and branch pipe, on inner side of insert, annular grooves are made and elastic annular seals are installed. In order to ensure the possibility of the pipe twist, there are protrusions on its inner surface. When coupling is used, it is necessary to install a standard combined coupling with internal thread matching the size with the thread on the pipe beforehand on one end of the connected pipes. Then, the branch pipe is moved inside the casing and screwed in by the wrench into the combined clutch. Welding device with standard nozzles coinciding in diameter with second end of connected pipes is introduced into gap between connector pipe and connector coupling. One of the nozzles is put on the pipe, and the connector coupling is pushed to the second nozzle. After warm-up, connector coupling is moved aside, welding device is removed and flanged connection is made by welding pipe and connector coupling.

EFFECT: invention relates to connections for polymer pipes and can be used in repair, for connection of damaged pipes and during installation of pipelines in hard-to-reach places, using a welding apparatus for welding polymer pipes with flanges corresponding to diameters of connected pipes.

2 cl, 4 dwg