Traceless longitudinal conveying device for fuel rods

The invention belongs to the technical field of mechanical belt conveying systems and control, and particularly relates to a traceless longitudinal conveying device for fuel rods. Generally, a belt pulley comprises two belt wheels and a connecting belt to form a belt pulley system. One belt wheel connected with motors serves as a driving wheel, the other belt wheel serves as a driven wheel, when the output power is not enough or under some special conditions, the driven wheel part can also be connected with the motors to serve as the driving wheel, at the moment, the whole system is a dual-output system, in the application process, it should be guaranteed that the two motors have the same output, otherwise, belt sliding will be caused. According to different space sites and size requirements, the belt of the belt pulley can be designed to be very short or very long, and when the diameter of the belt wheels is small and the belt is very long, besides the two belt wheels, some driven wheels playing a supporting