Lining structure of regenerative burner

The utility model discloses a lining structure of a heat accumulating type combustor. The pipe comprises a pipe body with a square section, the pipe body is composed of four side plates. Every two adjacent side plates are fixedly connected through a first connecting piece and a second connecting piece. Each of the first connecting piece and the second connecting piece consists of two plate bodieswhich are vertical to each other; first clamping grooves are formed in the outer sides of the two ends of each side plate. The two plate bodies in the first connecting piece are respectively clamped in the first clamping grooves in the two adjacent side plates; and second clamping grooves are formed in the inner sides of the two ends of each side plate, the two plate bodies in each second connecting piece are clamped in the second clamping grooves in the two adjacent side plates correspondingly, and clamping parts are formed in the positions, between the first clamping grooves and the second clamping grooves, of the s