Cover supply straight rail of seal welding machine

The utility model provides a seal welding machine cover supply straight rail which comprises a supply rail body, the supply rail body comprises a rail base body, a flange strip body and an air guide base, and the upper surface of the rail base body, the flange strip body and the side face of the air guide base are combined to form a material guide conveying groove used for guiding and conveying covers. 2-3 air guide channels are formed along the top of the air guide base, and air nozzles of the air guide channels are formed in the side wall, close to the material guide conveying groove, of the air guide base. The cover is guided and conveyed on the material guiding and conveying groove, the gas pipe connector is externally connected with nitrogen gas supply equipment through the gas pipe, the nitrogen gas supply equipment works to supply gas to the gas guiding channel, and the gas is blown out along the gas spraying opening; when the caps are vertically limited and move to the blowing holes, the caps can be b