Urban gas pipeline emptying device

The utility model discloses an urban gas pipeline emptying device, which relates to the technical field of gas and comprises a butt joint unit and a filter unit. The butt joint unit comprises an air inlet pipe, a clamping pipe, positioning strips and a switch assembly, the rear end of the air inlet pipe communicates with the clamping pipe, the outer side surface of the clamping pipe is fixedly connected with the positioning strips at equal angles, the switch assembly is installed in the air inlet pipe, and the rear portion of the right side surface of the air inlet pipe communicates with a connecting pipe; the filtering unit comprises a first conveying pipe, a second conveying pipe, a filtering pipe, a mounting ring, a spring, a movable ring, a filtering net, a baffle ring and a connecting assembly, the right end of the connecting pipe communicates with the first conveying pipe, the first conveying pipe is connected with the second conveying pipe through the connecting assembly, and the position, located betw