Supporting sealed electrothermal welding cover of compound pipe of polyurethane insulation

The utility model discloses a supporting sealed electrothermal welding cover of compound pipe of polyurethane insulation, it includes electrothermal welding cover body, electrothermal welding cover body one end end is equipped with the electrode and detains and two at least cingulums, be equipped with on electrothermal welding cover body is positive to prick with cingulum branch number assorted and detain, on be equipped with and prick detain the tooth, prick the opposite direction who detains tooth and cingulum, the cingulum inserts to prick to be connected by opposite direction's tooth close-fitting when detaining, the round resistance wire that is equipped with all around of electrothermal welding cover body reverse side is distinguished, the resistance wire district detains with the electrode and is connected, the line of connecting is detained to the electrode. The utility model discloses certainly, taking heat retaining second grade heat supply pipeline to connect the back, willseal the electrothermal w