Oil and gas pipeline flame arrester with self-cleaning function

The utility model discloses an oil and gas pipeline flame arrester with a self-cleaning function, which belongs to the field of pipeline flame arresters, and comprises a flame arrester shell, two symmetrical flanges are fixedly connected to the outer end of the flame arrester shell, and the two flanges are arranged on the flame arrester shell. The upper end of the flame arrester shell is fixedly connected with two symmetrical limiting sleeves, the inner wall of the flame arrester shell is fixedly connected with two first limiting rods which are symmetrically distributed, the two first limiting rods make contact with the outer ends of the limiting sleeves, sliding grooves are formed in the upper ends of the limiting sleeves, and second limiting rods are in threaded connection between the inner walls of the sliding grooves. And a second limiting rod penetrates through the flame arrester shell, so that in the use process of the flame arrester, the flame arresting core adsorbs impurities generated after gas combu