Quick connection expansion joint assembly

The utility model discloses a quick connection expansion joint assembly which comprises an external connection pipe, an internal connection pipe and an extrusion sleeve, the external connecting pipe is of a stepped structure formed by connecting a small-diameter pipe and a large-diameter pipe, and a convex ring is formed on the outer wall of the tail end of the large-diameter pipe; the extrusion sleeve is nested between the large-diameter pipe and the inner connecting pipe, a sealing ring is arranged between the end face of the extrusion sleeve and the connecting faces of the large-diameter pipe and the small-diameter pipe, a connecting ring is formed on the outer wall of the end, away from the small-diameter pipe, of the extrusion sleeve, the connecting ring is arranged on the outer sideof the convex ring, and the connecting ring is fixedly connected with the convex ring through a quick-connection clamping chain. The utility model provides a quick connection expansion joint assemblywhich is suitable for the