FIELD: lining of tubular members. SUBSTANCE: chemical pipeline is lined by an insert of synthetic material, which is fed in a broken trajectory inside the pipe at different bend angles and attached without heating, vacuum squeezing and chemical binding materials. At lining the outside diameter of cylindrical insert section is decreased by feeding it along the central axis by means of a squeezing device located at a certain distance from tubular member. Squeezed insert section is inserted in tubular member, an opportunity is afforded to expand practically to its initial outside diameter for engagement with tubular member with fastening inside the tubular member. The used squeezing device is furnished at least with two groups of squeezing rollers located at a certain distance from each other along the central axis. One of the groups of rollers is furnished with a drive for friction engagement with the insert and its longitudinal movement along the central axis. Each group of squeezing rollers is positioned round the elastometer insert and made of more than two squeezing rollers forming a feed opening for the insert, with the feed opening center located in the central axis. Each roller is positioned in the axis of rotation located at an angle to the central axis and axes of rotation of the other rollers for uniform distribution of force in insert circumference. EFFECT: facilitated procedure. 14 cl, 14 dwg
Authors
Dates
1998-06-20—Published
1992-01-21—Filed