Non-threaded bayonet pin contact tube

The utility model discloses an unthreaded bayonet pin contact tube which comprises an ignition plug body and a connecting sleeve, a connecting rod is fixedly installed on the ignition plug body, a connecting groove matched with the connecting rod is formed in the connecting sleeve, a plurality of positioning blocks are fixedly installed on the connecting rod, a plurality of positioning grooves are formed in the side wall of the connecting groove, and the positioning blocks are fixedly installed on the connecting rod. Each positioning groove is matched with the corresponding positioning block, an arc-shaped groove is formed in the side wall of the bottom of each positioning groove, each arc-shaped groove is matched with the corresponding positioning block, an inserting hole is formed in the sparking plug body, and a through hole is formed in the connecting rod. The contact tube has the advantages that the contact tube and the welding equipment can be connected only by inserting the connecting rod on the contac