Electrothermal fusion welding structure of pipeline joint coating sleeve after seamless thermal shrinkage

The utility model provides an electric hot melting welding structure after seamless thermal shrinkage of a pipeline joint coating sleeve, which comprises working mother pipes, a mother pipe heat preservation layer is arranged on the outer side of each working mother pipe, a mother pipe PE layer is arranged on the outer side of each mother pipe heat preservation layer, and two adjacent working mother pipes are connected by welding the pipeline joint coating sleeve. The pipeline joint coating sleeves are arranged on the outer sides of the PE layers of the two adjacent main pipes and cover the electric heating fusion welding wires at the two ends, filling spaces are formed between the pipeline joint coating sleeves and the ends of the two working main pipes, and polyurethane foaming layers are arranged in the filling spaces. The material of the pipeline joint coating sleeve is similar to that of a working mother pipe, the pipeline joint coating sleeve can be tightened through flame heating to be tightly combined