Gas insulated switchgear and cylinder assembly

The invention relates to a gas insulated switchgear and a cylinder assembly. The gas insulation cylinder assembly comprises a closed gas chamber defined by at least two cylinders and a conducting rodarranged in the closed gas chamber. The gas insulation cylinder assembly also comprises an insulation support plate which is fixed on the cylinder to support the conducting rod. A cylinder flange connected with the adjacent cylinder is arranged on the cylinder; the connected cylinder flanges are in sealing fit; the cylinder flange of at least one cylinder is provided with a sealing matching part in sealing fit with the cylinder flange of the adjacent cylinder and a supporting plate connecting part connected with the insulating supporting plate, the sealing matching part and the supporting plate connecting part are arranged in the radial direction of the cylinder, and the sealing matching part is arranged on the outer side of the supporting plate connecting part. Compared with the prior artthat the sealing of two s