| 摘要 |
<p>This invention relates to an equipment for welding melt-weldable plastic material pipe elements, said equipment comprising a metal plate (1) having plane-parallel walls (1', 1'') and being endowed with heating means that allow the heating of said plane surfaces to be performed; a first element (2) which is made up of a heat-conducting material, for melting the side surface of a first pipe (9) whose shape is such as to realize a contact surface (2') of almost constant width and maximum melting width at the points corresponding to the maximum stress zones, which first element is also provided with a central member (6) made up of a non-conducting material, which performs the function of a centering pin by inserting itself, during melting, into the hole drilled in said first pipe (9); and a second element (7) made up of a conducting material whose shape (7') is such as to match a shape previously realized on a head of the pipe (9) or fitting to be welded by butt welding on the lateral surface of the first pipe and corresponding to the melting surface realized on said first pipe (9) by said first element (2); said first (2) and said second (7) element being endowed with a back surface contacting the flat plate and with means (3, 4; 8) for coupling with the plane surfaces of said plate (1); a welding process in which said equipment is employed, the pipe fittings which are specially realized for said equipment, and the pipe elements so realized.</p> |
