Maintenance-free pipeline heat preservation structure suitable for outdoor conditions

The utility model provides a maintenance-free pipeline heat preservation structure suitable for outdoor conditions, which comprises a protective layer and a heat preservation layer, a fireproof heat preservation layer is arranged on the inner side of the heat preservation layer, and fireproof isolating rings are arranged between the heat preservation layers at intervals. The protective layer further comprises a metal sheet first protective layer and a plastic sticky second protective layer adhered to the outer layer of the metal sheet first protective layer from inside to outside, the metal sheet first protective layer tightly wraps the outer side of the heat preservation layer to protect the heat preservation layer, and the plastic sticky second protective layer is adhered to the outer side of the metal sheet first protective layer to protect the heat preservation layer. And a maintenance-free monitoring device is further arranged on the pipeline, the interlayer temperature of the heat preservation layer and