Mining safety anti-impact stand column with built-in air pressure anti-impact valve

The utility model discloses a mining safety anti-impact stand column with a built-in air pressure anti-impact valve, which comprises a movable column, a cavity is processed in the movable column, a pneumatic anti-impact valve is arranged in the cavity, the pneumatic anti-impact valve comprises a guide sleeve and a T-shaped valve core, the thin end of the T-shaped valve core is inserted into the guide sleeve, and the thin end of the T-shaped valve core is inserted into the guide sleeve. An air cavity is reserved outside the thick end face of the T-shaped valve element and provided with an air vent, a pressure plug or a safety valve, and a limiting step of the T-shaped valve element is arranged on the wall of the air cavity. The guide sleeve and the inner wall of the movable column space are in threaded sealing connection or fixed into a whole, the pneumatic anti-impact valve can also comprise an independent shell, and the shell is installed in the cavity of the movable column. The stand column adopts an intern