Bead type flame arrestor for mining explosionproof diesel engine

The utility model relates to a fire extinguishing device for offgas of a mining explosionproof diesel engine, in particular to a bead type flame arrestor for a mining explosionproof diesel engine, which solves the problem that the prior flame arrestor adopts a fence type structure, has high manufacture cost, is difficult to replace and clean, and is easy to block an air flue. The bead type flame arrestor for the mining explosionproof diesel engine comprises a hollow round tube, wherein a receiving tray of the flame arrestor is fixed on the outer ring of the upper end surface of the hollow round tube, an upper sieve sheet and a lower sieve sheet fixed with the inner wall of the hollow round tube are respectively arranged on both ends of the hollow round tube, through holes are all formed onthe two sieve sheets, compact toughened glass beads arranged in a staggered manner are encapsulated in a hollow cavity formed by the two sieve sheets, a layer of elastic stainless steel wire is layedbetween the inner side of the upper sieve sheet and the toughened glass beads, and an elastic retainer ring is clamped and fixed on the outer surface of the upper sieve sheet. The utility model has the advantages of simple structure, reasonable design, small volume, light weight, convenient disassembly, maintenance and cleaning, better fire resistant effect and lower manufacture cost compared with the fence type flame arrestor.