Supporting beam applied to annular air duct of coke dry quenching furnace

The utility model discloses a support beam applied to an annular air duct of a dry quenching furnace, the annular air duct is formed by a gap between an outer wall and an inner wall of the dry quenching furnace, the support beam consists of a cross beam and a vertical beam, the vertical beam is parallel to the inner wall, and the gap between the vertical beam and the inner wall is 1.5-3cm; one endof the cross beam is connected with the vertical beam, and the other end of the cross beam is embedded into the outer wall. The supporting beam is composed of the cross beam and the vertical beam, one end of the cross beam is embedded in the outer wall, the expansion gap is reserved between the vertical beam and the inner wall, when the temperature of the annular air duct is high, the vertical beam expands and abuts against the inner wall, and the inner wall and the outer wall of the annular air duct can be effectively prevented from bulging and collapsing. Only the cross beam is embedded into the outer wall, so that