Underground outer wall inlet and outlet pipeline tightness detection device

The invention discloses an underground outer wall inlet and outlet pipeline tightness detection device, and belongs to the technical field of underground waterproofing. The device is characterized bycomprising a detection cover (6) and a connecting device, the detection cover (6) is a shell with one end face protruding, the protruding face is provided with a mounting hole allowing an undergroundouter wall inlet and outlet pipeline to penetrate through, and a pipeline sealing connecting device is arranged in the mounting hole and arranged outside the underground outer wall inlet and outlet pipeline in a sleeving mode; the other end face of the detection cover (6) is attached to the outer side of the underground outer wall, a water inlet pipe (11) and a water outlet exhaust pipe (12) are arranged on the upper portion of the detection cover (6), and a sealed detection space is formed between the detection cover (6) and the underground outer wall. The underground outer wall and the through-wall pipeline form a cl