Hot air pipe combined refractory brick

The utility model relates to a hot air pipe combined refractory brick, which effectively solves the problem of masonry, deformation and short service life for the hot air pipe; the combined refractory brick builds the hot air pipe. The combined refractory brick comprises a T-shaped refractory brick, a left knife-type refractory brick, a right knife-type refractory brick and an arch wedge-shaped refractory brick; two inclined surfaces on the left of the T-shaped refractory brick are arranged on two inclined surfaces on the right of the right knife-type refractory brick, and the inclined surfaces are built and connected in manner of inner phase; two inclined surfaces on the left of the left knife-type refractory brick are arranged on two inclined surfaces on the right of the T-shaped refractory brick, and the inclined surfaces are built and connected in manner of inner phase; a sand grip on the left of the right knife-type refractory brick is arranged in a recess on the left of the arch wedge-shaped refractory brick, and the sand grip and the recess are built and connected in manner of inner phase; a sand grip on the left of the arch wedge-shaped refractory brick is arranged in a recess on the right of the left knife-type refractory brick, and the sand grip and the recess are built and connected in manner of inner phase. The masonry hot air pipe of the utility model has long service life, and the masonry hot air pipe of the utility model doesn't affected by the big temperature difference of the hot-and-cold variation, the constriction and expansion of the pipe and the poor operating-condition condition; the masonry brick doesn't fall off, and the pipe doesn't conduct breakout; the frequency of maintenance is reduced, the enterprise cost is lowered, and the hot air pipe combined refractory brick has maximal economic benefit.