Tubular busbar joint insulating structure

The invention belongs to transmission equipment and relates to a tubular busbar joint insulating structure for performing insulation shielding on a tubular busbar joint part. The tubular busbar joint insulating structure comprises a pair of tubular busbar ends of which the conductor parts are connected with each other; an aluminum shielding cylinder is sleeved on the periphery of the connecting part of the two tubular busbar ends; an internal insulating layer is compounded on the inner wall of the shielding cylinder; and a pair of cross-over blocks are padded between busbar external insulating layers on the two sides of the connecting part of the two tubular busbar conductors and the internal insulating layer. The tubular busbar joint insulating structure has the advantages of: 1, high overall insulating capacity and improvement on operational reliability of product; 2, good shielding effect and capacity of reducing line loss caused by electromagnetic field of joint part; 3, capacity of improving electric fie