The principle of string anti clogging vibrating screen: the plane two-dimensional fixed hole is extended to the three-dimensional variable mesh, and the effective vibration difference is established by using the secondary vibration generated by the random vibration of adjacent screen strips. It realizes the continuous change of screen hole in screening, so there is no fixed critical particle stone. The specific method is to set a moving screen bar with relatively large vibration amplitude in two relatively stationary static screen bars, and the moving screen bar can bounce up the stone during jam or make it pass the screen.

According to the characteristics of stone materials, the relative elastic strength and vibration amplitude of static and dynamic screen bars are adjusted to make the screen in a good screening state. The screening efficiency of the anti blocking screen is about 30% higher than that of the fixed mesh screen, which basically realizes the self-cleaning function of the screen and greatly reduces the screen blockage.

The static screen bar of string anti clogging vibrating screen is thicker than the moving screen bar, so it not only increases the wear resistance of the screen, but also improves the screening efficiency. At the same time, the screen bar structure of anti blocking screen can greatly reduce the contact point between stone and screen hole and reduce the occurrence of hole blocking.