| 摘要 |
<p>PURPOSE:To detect insulation oil positively in safety by providing an outer tube having gas detecting section and an inner tube longer than the outer tube and fixing the inner tube such that the lower part thereof is inserted into a joint box such as an OF cable. CONSTITUTION:The lubrication structure comprises an outer tube 43 having a gas detecting chamber 56 at the upper part thereof, and an inner tube 41 longer than the outer tube 43, wherein the inner tube 41 is fixed such that the lower part thereof is inserted into a joint box part of an OF cable, for example. The inner tube 41 is made of fluororesin excellent in oil resistance, gas permeability, heat resistance and mechanical characteristics. The outer tube 43 is provided with a large number of heat radiation fins 44 and secured through a seal packing 34 to the upper oil inlet 32 of the joint box part 30. According to the constitution, insulation oil 35 can be detected in safety without causing leakage.</p> |
