Anti-folding apparatus of hydraulic shaft guide with flexibility

The utility model discloses an anti-folding apparatus of hydraulic shaft guide with flexibility and the apparatus comprises a limited block clutched between two movable blocks of a movable shaft guide and the limited block prevents the two movable blocks from converging after a distraction. The limited block is driven by an outer oil tank. The anti-folding apparatus is simple in structure and good in design; a mechanical chucking method is employed to ensure an expansion width of the movable shaft guide which is the same as a fixed shaft guide; the method is more reliable and firmer than a hydraulic method; by the method, the whole hydraulic flexible pot is safer and more reliable, thereby enabling the pot with good practicality and producing great economic and social effects.