| 摘要 |
<p>PROBLEM TO BE SOLVED: To further improve earthquake resistance in such a pressure vessel of an gas-insulated bus bar apparatus, which has partly to be installed with a bridged structure at a high position from ground in a layout to cross an in-plant road or to have a solid crossing, when the gas-insulated bus bar apparatus is installed in the yard of a substation, and further, when a bellows part of the pressure vessel is disposed in the bridged part, the vibration proof is deteriorated due to an excessive load, and installation of a steel bridge as a supporting structure to support the pressure vessel is required as well. SOLUTION: The pressure vessel 3 having no bellows and the steel bridge 10 are solidly connected at an approximately central position G of the bridged horizontal parts 8 and 13, respectively, and no connection point between the two is provided at riser parts 6 and 11, and 7 and 10 of the two. The earthquake resistance is improved by reducing the weight the steel bridge 10 has to support, by eliminating a rigidity-weak part from the pressure vessel 3 by omitting the bellows, while thermal expansion and contraction of the horizontal part 8 of the pressure vessel 3 can be absorbed by varying connection angles between the horizontal part 13 of the steel bridge 10 and the riser parts 10 and 11.</p> |
