Pipeline plugging device

The invention discloses a pipeline plugging device, relates to the technical field of pipeline plugging, and aims to solve the problem that an alarm is given when the load of a robot is too large when a plug is plugged into a heat transfer pipe and improve the plugging efficiency of the heat transfer pipe. The pipeline plugging device comprises a first driving mechanism, a plug, a bearing frame, a second driving mechanism and two oppositely-arranged sliding blocks, the first driving mechanism is used for being arranged at the driving end of the robot, and the plug is used for being plugged into a pipeline. The plug is arranged at the driving end of the first driving mechanism, and the first driving mechanism drives the plug to move in the axis direction of the plug. A guide rail is arranged on the bearing frame, the sliding blocks are provided with limiting positions and releasing positions relative to the plug, the two sliding blocks wrap the end, close to the driving end of the first driving mechanism, of t