Capacity-increase buffering anti-powerful-impact double telescopic stand columns

• Main Authors: ZHANG DESHENG, ZHANG JINKUI, REN HUAIWEI, LIU YEXIAN, FU JINGYU, WANG GUOFA, ZHAO ZHILI
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention discloses an air chamber hydraulic capacity-increase anti-powerful-impact double telescopic stand column and an expansion-cylinder capacity-increase anti-powerful-impact double telescopic stand column. The air chamber hydraulic capacity-increase anti-powerful-impact double telescopic stand column is composed of an outer cylinder with a bypass safety valve, a middle cylinder plunger and an air chamber hydraulic device arranged inside the plunger. The air chamber hydraulic device achieves the anti-impact purpose through balanced absorption of impact energy by an air piston and a hydraulic rod. The expansion-cylinder capacity-increase anti-impact double telescopic stand column is composed of an outer cylinder with a bypass safety valve, a middle cylinder plunger and an expansion cylinder arranged inside the plunger and filled with liquid. The situation that pressure of the liquid makes the capacity increase in the expansion cylinder is utilized for absorbing the impact energy to achieve the buffering purpose. The two kinds of anti-powerful-impact double telescopic stand columns have liquid anti-impact performance and safety valve protection of common double telescopic stand columns and also obviously reduce impact loads by the utilization of the method that suffering impact is increased to increase the impact-suffering capacity, the anti-impact performance of the stand columns is effectively improved, then the reliability of the stand columns is improved, and the stand columns are particularly suitable for anti-impact hydraulic supports high in requirement and especially large-bore large-stroke stand columns.