Sealing element of gas source treatment connecting plate

The utility model discloses a sealing element of an air source processing connecting plate, which comprises a fixing support, a connecting plate arranged on one side of the fixing support, an atomized lubricator valve body arranged on the connecting plate and a pressing block arranged on one side of the connecting plate, a connecting hole is arranged in the middle of the connecting plate in a penetrating mode, and an air inlet and outlet hole corresponding to the connecting hole is arranged on the atomized lubricator valve body. A sealing ring is installed in the connecting hole, a supporting ring is installed in the sealing ring, a protruding part is arranged on the inner side wall of the sealing ring, and a concave groove matched with the protruding part is formed in the outer side wall of the supporting ring. A gap exists between the sealing ring and the connecting plate, the sealing effect of the sealing ring is affected, meanwhile, the supporting ring can be limited through the arranged concave groove an