B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
336/12, 327/76
B23K 11/24 (2006.01) H01F 27/16 (2006.01) H01F 30/16 (2006.01)
Patent
CA 1134455
DOUGHNUT-TYPE TRANSFORMER FOR RESISTANCE BUTT WELDING A B S T R A C T The transformer comprises an annular core consisting of se- veral spirally wound cores, each tightened by rod members. The annular core is surrounded by transformer sections comprising the primary and the secondary windings. The invention resides in that the turns of both the primary and the secondary wind- ings are shaped as sectors in the plane of the transformer cross-section. A cooled turn of the secondary winding is placed between the turns of the primary winding in each transformer section. The turns of the windings surround the annular core so that the geometric center of the annular core in the cross- -sectional plane thereof and the geometric center of the an- nular core is farther from the transformer axis. Each turn of the secondary winding is provided with a passage for a cooling water to circulate therethrough, which water being supplied and discharged through one and the same contact ring and is first cooling one half of the whole number of the transformer sections and then the other half. The invention is useful in welding parts having a highly extended perimeter, such as large-diameter pipes for laying pi- pelines to convey petroleum and gas.
350981
Dobrovolsky Stanislav D.
Galyan Boris A.
Kuchuk-Yatsenko Sergei I.
Lebedev Vladimir K.
Paton Boris E.
Institut Elektrosvarki Imeni E.o. Patona Akademii Nauk Ukrainsko
Swabey Ogilvy Renault
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