| 摘要 |
PURPOSE:To prevent the break down of bushing insulator and the leakage of oil of a transformer to be caused by deformation and vibration when an earth quake took place by a method wherein the junction of the flat plate part and the cylindrical pocket of the tank is made to have a structure elevating the rigidity. CONSTITUTION:Reinforcements 12 are connected by welding to the circumference of the opening part 11 being provided in a cover 10 on the upper face of a tank, and a rectangular washer 14 to stick a cylindrical pocket 13 is equipped. The base part of the cylindrical pocket 13 is formed in a trumpet shape 17 and is connected to a connecting flange 15 by welding, etc., and is fixed to the rectangular washer 14 with bolts, etc. By this way, the bending rigidity at the base part of the cylindrical pocket 13 is enlarged, the rigidity is enhanced in co-operation of the reinforcements, and the break down of bushing insulator and the leakage of oil to be caused by deformation and vibration when an earthquake took place can be prevented. |
