Visual pipe fitting blockage mechanism and blockage method thereof

The invention discloses a visual pipe fitting blockage mechanism. The mechanism comprises a blockage device and a block, wherein the blockage device is used for placing the block in a flange blockage seat on a fitting and comprises a shell, a transmission rod, a lifting device, a separating and connecting device and a blockage connecting box; the transmission rod is arranged in the shell; the lifting device is used for lifting the transmission rod; the separating and connecting device is used for separating and connecting the block; the blockage device connecting box is fixedly connected with the shell and is provided with a monitoring device for monitoring the blockage movement of the block; the monitoring device comprises a camera, a fixed seat and monitoring equipment; the camera is arranged in the blockage connecting box; the fixed seat is used for fixedly arranging the camera; the monitoring equipment is connected with the camera. The visual pipe fitting blockage mechanism realizes pipeline blockage from inside to outside, a process for punching in the blockage seat and the labor are saved, blockage is performed under a visual condition, the mechanism is safer and more reliable, and the risk that gas leaks from a screw hole is avoided.