Heat preservation type heating and ventilation pipe for heating and ventilation engineering

The utility model discloses a heat preservation type heating and ventilation pipe for heating and ventilation engineering, which comprises a pipeline body, a heat preservation layer is wrapped outside the pipeline body in a sleeved mode, the pipeline body is externally wrapped and protected through the heat preservation layer, a convex ring is integrally installed at the front end of the pipeline body, and a ring groove is formed in the tail portion of the pipeline body. The adjacent pipeline bodies are connected in a sealed mode through matching of the convex rings and the annular grooves, and a plurality of locking units are installed at the connecting positions of the adjacent pipeline bodies. The convex rings arranged at the head and the tail of the pipeline body are matched with the annular grooves, so that the adjacent pipeline bodies can be stably clamped and fixed, the joints of the adjacent pipeline bodies can be stably clamped and sealed, and the sealing performance of the joints of the pipeline bod