Pressure tank, gas-insulated switching device using the same, and manufacturing method of pressure tank

摘要

A pressure tank in which the manufacturing efficiency is high and which does not hinder the opening and closing of a vacuum valve or the like in the pressure tank is obtained. A pressure tank according to the present invention comprises a tank body (5) formed with at least one slit-shaped long hole (15) passing therethrough and forming a space therein, an elongated portion (17) A reinforcing member 10 having an electric field relieving portion on the side opposite to the long side portion and fitted to the inner wall surface of the tank main body 5 by inserting the long side portion 17 into the long hole 15, And a welded portion 18 which is melted from the outside of the tank body 5 to fix the long hole portion 15 and the long portion 17 with no gap and fixed.