| 摘要 |
PCT No. PCT/FI86/00085 Sec. 371 Date May 15, 1987 Sec. 102(e) Date May 15, 1987 PCT Filed Jul. 23, 1986 PCT Pub. No. WO87/00698 PCT Pub. Date Jan. 29, 1987.Apparatus for underwater working, especially for heating, welding, torch cutting, cleaning and electrolytical coating of metal constructions with the aid of electrical current. The apparatus comprises a rotatable electrically conductive shaft (2) arranged on the frame element (1) of the apparatus and designed to conduct electrical current to the removable tip element (3) attached to the end of shaft, this tip element being such as heating bush, welding electrode, cutting, cleaning and/or coating disk. Preferably the shaft (2) comprises an outer shaft element (21) and an inner shaft element (22) arranged within each other and insulated electrically from each other; that two chambers (13, 14) filled with electrically conductive medium and provided with pressure balancing devices (11, 12) are arranged on the frame element (1), of which one is connected to '+' pole and the other to '-' pole of the power source, and of which one surrounds the outer shaft element (21) and the other the inner shaft element (22), and that the tip element is electrically conductive and consists of two parts, whereby one part (31) is attached to the outer shaft element (21) and the other part (32) to the inner shaft element (22). |
