DEVICE AND METHOD FOR PRE-INSTALLATION EXPANSION Russian patent published in 2016 - IPC B29C61/00 

FIELD: construction.

SUBSTANCE: group of inventions relates to the device and method of pre-installation expansion. The device for pre-installation expansion in place of installation includes a pressure application facility, which forms an inner surface expanded in radial direction and a flat surface extended in the radial direction from the inner surface expanded in the radial direction. At the same time the device comprises an elastomer tube, having the front end, arranged opposite to the rear end, and an axial hole, extended through it and made as capable to perceive the supporting core. Besides, the device comprises an adapter having a stepped part formed by the cylindrical outer surface and a flat surface extended in radiation direction outside from the cylindrical outer surface, and the axial hole extended through it, which has the diameter substantially equal to the diameter of the axial hole of the elastomer tube. At the same time the adapter is arranged substantially coaxially with the elastomer tube, between the facility of pressure application and the elastomer tube. During introduction of the support core into the elastomer tube at its rear end, the elastomer tube presses the flat surface of the adapter to the flat surface of the pressure application facility. Contact surfaces of the rear end of the adapter and the front end of the elastomer tube are characterised by high friction ratio. Besides, the adapter and the elastomer tube expand in radial direction substantially synchronously, and the cylindrical outer surface of the adapter provides pressure in radial direction outside to the inner surface of the pressure application facility expanded in radial direction.

EFFECT: realisation of pre-installation expansion of parts in place of installation without deterioration of their structural integrity.

15 cl, 10 dwg