Spark arrester for combustible gas

The utility model relates to a back -fire relief explosion -proof equipment technical field especially relates to a spark arrester for combustible gas, and it includes the jar physically, its characterized in that jar body upper portion is equipped with intake pipe, blast pipe, explosion venting port, jar body lower part is equipped with inlet tube and blow off pipe, all be equipped with the valveon intake pipe, blast pipe, inlet tube and the blow off pipe, the internal sieve that is equipped with of jar, linking to each other with the internal wall of jar all around of sieve, the intake pipedeepening is to below the sieve, the internal water that contains of jar, the lowest water level line of water is in sieve upper portion, the position that the jar body was gone up between sieve upper portion and lowest water level line is equipped with the warning pipe, the inlet tube with be connected with water refrigeration cycle device between the warning pipe. The utility model has the advantages of simple structure