Hoop device for preventing furnace shell from cracking

The hoop device capable of preventing the furnace shell from cracking comprises a pull rod and fixing pieces, the fixing pieces comprise the first fixing piece and the second fixing piece, and the first fixing piece and the second fixing piece are each in a circle shape formed by a plurality of arc-shaped plates which are connected through bolts. A first connector and a second connector are arranged on the opposite arc-shaped plates of the first fixing piece and the second fixing piece respectively, and the first connector and the second connector are connected together through a pull rod. The device is simple in method, convenient to operate and low in cost, the design defects of a rigid hoop and a rigid connecting pull rod are thoroughly overcome, furnace shell expansion and contraction and furnace shell up-down expansion and contraction are in a loose free state, furnace shell cracking limitation is thoroughly solved, furnace shell cracking is avoided, and social and economic benefits are remarkable. 一种防止炉