Central mechanism gland air outlet device

The utility model provides a gland air outlet device of a central mechanism. The device comprises an upper hollow stud, a rotating ring, a lower hollow stud, a cylinder body, a quick joint and a switch valve, a hollow stud is machined at the upper end of the rotating ring; a lower hollow stud is arranged at the lower end of the rotating ring; the lower hollow stud is mounted at the upper end of the cylinder body through a thread and extends into the cylinder body; an auxiliary pipe is fixed at the right end of the cylinder body; a switch valve is mounted on the auxiliary pipe; the auxiliary pipe is fixed at the upper end of the connecting pipe; a quick joint is fixed at the lower end of the connecting pipe; the left end of the connecting pipe is attached to the sealing cylinder. The connecting pipe is fixed to the right end of the cylinder body and penetrates through the cylinder body to be attached to the sealing cylinder, the upper end of the spring is fixed to the lower end of the sealing cylinder, the upp