Marine spark arrester for natural gas engine

The utility model discloses a marine natural gas engine spark arrester belongs to engine annex technical field, including last casing, lower casing, seal gasket, back -fire relief core. The back -fire relief core is installed in the inner chamber of compriseing upper and lower casing, and the position is connected at upper and lower casing to the seal gasket pad, and upper and lower casing is by bolted connection. Upper and lower casing axial inner chamber is the circular channel, goes up the casing upper end and has flange, lower extreme and radially outwards have and have bolt mounting holes on protruding edge, the protruding edge, and lower casing lower extreme has flange, upper end and radially outwards has and have the corresponding bolt mounting holes of last casing on protruding edge, the protruding edge, seal gasket has the construction bolt hole corresponding with upper and lower casing, the back -fire relief core is the tiny pore that flat cylindrical shape, axial have the high density. The utility