Electric heating – Metal heating – Of cylinders
Patent
1977-05-19
1979-02-27
Truhe, J. V.
Electric heating
Metal heating
Of cylinders
219 615, 21912511, 285 13, 285136, B23K 916
Patent
active
041420845
ABSTRACT:
A machine for the automatic butt welding of pipes on tube plates by TIG or plasma process with or without weld metal, or of abutting pipes with TIG or plasma process with internal torch, comprising a control unit for programming the welding parameters according to cycles suitable to the different welding types and a gun which will be centered on the pipes to be welded, supporting a torch which can effect more sequential revolutions, wherein the supplies of the fluids (inert gas, cooling fluid, etc.) necessary to the welding operations are conveyed from the stationary part to the movable part through a coupling consisting of contiguous solids of revolution, stationary and movable respectively, in the thickness of which are provided the ducts, on the surface of one solid faced to the other being obtained recesses provided at their sides with seal elements, through said recesses the fluids passing from the ducts of the stationary body to the ducts of the movable body, and in which alternate to the recesses conveying the fluids are worked supplementary recesses with ducts leading to outside or to negative pressure sources so as to drain the fluids possibly escaping from the seal elements, avoiding thus their mixing.
REFERENCES:
patent: 3462176 (1969-08-01), Goodrum
patent: 3621182 (1971-11-01), Peyrot
patent: 3754114 (1973-08-01), Peyrot
patent: 3754115 (1973-08-01), Roberts et al.
patent: 3784778 (1974-01-01), McPherson et al.
Allgemeine Patentverwertung Anstalt
Shaw Clifford C.
Truhe J. V.
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