Ceramic composite reducer pipe

The utility model discloses a ceramic composite reducer pipe, which belongs to the technical field of ceramic composite pipes, and comprises a reducer pipe body, the pipe diameter of the first end of the reducer pipe body is larger than that of the second end of the reducer pipe body, and the first end is provided with a first flange; the third end of the transposition pipe is in butt joint with the second end, the pipe diameter of the third end is equal to that of the second end, and a second flange is arranged at the fourth end of the transposition pipe; the limiting ring is arranged on the second end and the third end in a sleeving manner, and the second end and the third end are clamped by the limiting ring; the flow of the pipe body is changed through the reducer pipe body, after the reducer pipe body and one pipeline are installed, under the rotary supporting effect of the limiting ring, the transposition pipe can be installed on the other pipeline in a butt joint mode only by rotating the transposition