Adjustable welding device of anti-explosion bolt on capacitor shell cover

The utility model discloses an adjustable welding device of an anti-explosion bolt on a capacitor shell cover. The adjustable welding device comprises welding electrodes and an air cylinder. The end of a piston rod of the air cylinder is fixedly provided with an annular liner plate, the bottom face of the annular liner plate is fixedly provided with an annular installation plate, the bottom face of the annular installation plate is provided with an annular sliding groove, two sliding bases are installed in the annular sliding groove in a sliding mode, the bottom faces of the two sliding bases are fixedly provided with cushion plates respectively, and the welding electrodes are installed on the cushion plates. The adjustable welding device is ingenious in structure improvement, the welding electrodes can move along with the sliding bases in the annular sliding groove to be adjusted, moving is convenient and fast, and the anti-explosion bolt on the capacitor shell cover can be welded conveniently.