Cutting and marking device for pipe orifice of enamel reaction kettle

The utility model discloses an enamel reaction kettle pipe orifice trimming and cutting lineation device which comprises an annular plate, a supporting column and a limiting column. The annular plate is of an annular structure; the number of the supporting columns is more than three, the annular plate is connected to the supporting columns, and the connecting height of the annular plate and each supporting column is adjustable or each supporting column is of a length-adjustable structure. The limiting columns are connected to the bottom of the annular plate, one end of each limiting column is an outer end, the other end of each limiting column is an inner end, the distance between the inner end of each limiting column and the axis of the annular plate is adjustable, and the inner ends of the limiting columns always point to the axis of the annular plate. According to the enamel reaction kettle pipe orifice trimming and scribing device, rapid, accurate and stable scribing can be achieved through adjustment of