Rapid switching device for tail gas pipe in national sixth emission test

The utility model discloses a tail gas pipe rapid switching device for a national sixth emission test, and belongs to the field of automobile tail gas tests. One end of the exhaust equipment tail gas collecting channel interface is connected to the test equipment, and the other end of the exhaust equipment tail gas collecting channel interface is fixedly connected with a connecting nozzle II; one end of the stainless steel adapter pipe is fixedly connected with the other connecting nozzle II, the other end of the stainless steel adapter pipe is arranged in the connecting sleeve, an automobile silencer is further sleeved with the connecting sleeve, the connecting sleeve is composed of a cylinder and two protruding plates, an opening is formed in the side wall of the cylinder, the two ends of the opening are fixedly connected with the protruding plates respectively, and the protruding plates are connected with the stainless steel adapter pipe. And fastening screw holes I and fastening screw holes II are formed