Chain for coal conveyor

The utility model discloses a chain for a coal conveyor. The chain comprises an inner wing plate, a pin shaft, a sleeve, a roller, an outer wing plate, a first connecting plate, a second connecting plate and reinforcing ribs, wherein the inner wing plates are symmetrically arranged on the two sides of the pin shaft, a sleeve is sleeved on the pin shaft between the inner wing plates on the two sides, a roller is sleeved on the outer circle diameter of the sleeve, the outer wing plates are arranged on the outer sides of the two adjacent inner wing plates, and first connecting plates are arrangedon the upper wall surfaces of the inner wing plates; the first connecting plate is arranged between the tops of the inner wing plates, the second connecting plate is arranged between the tops of theouter wing plates, relative movement between the two inner wing plates and the two outer wing plates is reduced, the pin shaft is prevented from being pulled apart, meanwhile, the reinforcing ribs arearranged on the outer wing