Special assembly for spring energy storage quick-opening rotary ball valve used in special equipment for dissociation production of vascular plant straw fiber bundles

The invention discloses a special assembly for a spring energy storage quick-opening rotary ball valve, which is used in special equipment for dissociating and producing vascular plant straw fiber bundles, and is positioned on a critical section pipeline with the smallest sectional area on a narrow throat section of a Laval three-section component, an inlet of the narrow throat section is connected with a convergence section, and an outlet of the narrow throat section is connected with an expansion collection section; the cross sections of the convergence section, the narrow throat section and the expansion collection section are in a state of narrowing firstly and then widening; the special assembly for the ball valve comprises a valve body, a ball is arranged in the valve body, the upper end of the ball is connected with a ball rotating shaft driving the ball to rotate, and the ball rotates to instantly open or close a ball valve passage; when the passage of the ball valve is opened, the cross section of th