High-density high-temperature-resistant polytetrafluoroethylene tube

The utility model discloses a high-density high-temperature-resistant polytetrafluoroethylene pipe which comprises a polytetrafluoroethylene pipe body, sliding grooves are evenly formed in the inner wall of the polytetrafluoroethylene pipe body, sliding blocks are installed in the sliding grooves in a sliding mode, one end of each sliding block extends into the polytetrafluoroethylene pipe body, a heat insulation plate is fixedly installed at one end of each sliding block, and a heat insulation pad is fixedly installed on the outer side of each heat insulation plate. A first cavity is formed in each sliding block; according to the high-density high-temperature-resistant polytetrafluoroethylene pipe, by arranging the sliding grooves, the sliding blocks, a heat insulation plate, a heat insulation pad, a first cavity, first springs, limiting columns and limiting holes, when a worker inserts the heat insulation plate into the polytetrafluoroethylene pipe body, the sliding blocks slide into the sliding grooves, an