▎ 摘　　要

NOVELTY - The utility model claims a MPP pipe with built-in insulating composite layer, belonging to the MPP pipe field, a MPP pipe with built-in insulating composite layer, comprising a pipe main body, the pipe main body is excavated with a channel, the pipe main body is excavated with a built-in layer, the built-in layer is located between the pipe main body and the channel, the inner layer is filled with a plurality of balloons, the bottom end of the balloon is fixedly connected with a secondary heat insulating layer, the upper end of the secondary heat insulating layer is fixedly connected with a main heat insulating layer, the balloon is provided with a bag, the bag is located at the upper end of the main heat insulating layer, the bag is provided with a plurality of foam beads, the top end of the balloon is fixedly connected with a graphene block, the graphene block is located on the upper side of the foam ball, the inner wall of the built-in layer is provided with a blocking ring, the blocking ring is located at the outer side of the saccule, the solution can be used for protecting the cable through the MPP pipe, the insulating layer is placed in the pipe, so that it has a certain heat preservation effect, compared with the external insulating layer, the built-in effect is better, and it is not easy to be damage.