Real-time display device for steel passing length of rolled steel

The utility model discloses a steel rolling steel passing length real-time display device which comprises a sensor shell and an installation mechanism, the sensor shell is connected with a display panel, and any side of the sensor shell is connected with an alarm and a measuring sensor. The mounting mechanism comprises a soft ferrule, mounting rings are symmetrically arranged at the top of the soft ferrule, and sensor shells are arranged in the mounting rings in a sleeving manner; moving shafts are symmetrically arranged in inner cavities of the soft ferrules, two ends of each moving shaft extend out of the soft ferrules, limiting blocks are arranged at one ends, close to the processing units, of the moving shafts, rotating discs are rotatably connected to the other ends of the moving shafts, and magnetic attraction blocks are connected to the outer sides of the rotating discs. The rotating disc can rotate on the moving shaft to change the position of the magnetic attraction block, and the moving shaft can mo