推进机设备：推进机在整条生产线中起到持续输送推力的作用，通过调节上下部压辊机构将钢管压紧于整条生产线轴线上，压辊机构转动时产生摩擦力将钢管推动向前运行，运行时可以变频调速实现与整条生产线速度匹配。Propelling machine: the propelling machine plays a role of continuous transmission of thrust in the whole production line. The steel pipe is compressed on the axis of the whole production line by adjusting the upper and lower roller pressing mechanisms. When the roller pressing mechanism rotates, th