Welding accessory for welding pipes
OwnerJan Schepersinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a welding accessory (1) to support and centre two pipe ends (2a, 2b) to be butt-welded. The welding accessory (1) comprises a central guide frame, (3, 4, 5a-d), over which the two pipes ends (2a, 2b) can be slid, provided with supports (13a-d, 16a-d) and with pressure means, for pressing the supports against the pipes walls. The supports (13a-d) have a triangular or trapezial shape and have a radius of curvature of the pipes. The space between the supports (13a-d) is filled by auxiliary supports (16a-d), also having a triangular or trapezial shape, which are pulled in place by springs (18a-d).
Claims12
Welding accessory for supporting and centring two pipe ends of pipes to be butt-welded together, comprising a central guide frame, over which both pipe ends can slide, provided with support means and with pressure means for operationally pressing the support means against the pipe walls, characterized in that the welding accessory is provided with a number of supports which can move in a radial direction, away from the central guide frame and with an equal number of auxiliary supports which at least operationally fill in the space between the supports.
Method for butt-welding two pipe ends, according to which the pipe ends to be welded are slid from both sides over a welding accessory before the pipe ends are welded, characterized in that from a central guide frame, which is part of the welding accessory, a number of supports with a triangular or trapezial shape are moved outward in a radial direction and pushed against the inner walls of the pipe ends and that auxiliary supports with a triangular or trapezial shape are pulled or pushed between the supports, for filling in the spaces.
Dependencies are inferred from the claim text.