Detection circulating ventilation equipment with negative feedback function for mine safety production

The invention relates to the technical field of mine safety ventilation equipment, in particular to mine safety production detection circulating ventilation equipment with a negative feedback function, which comprises a ventilation pipe, the outer surface of the ventilation pipe is symmetrically and fixedly connected with positioning plates, and the inner part of the outer surface of the ventilation pipe is slidably connected with an annular gear; a protection plate is fixedly connected outside one end, close to the annular gear, of the ventilation pipe; environmental data in a mine are analyzed, and the ventilation effect of the equipment is provided in a data analysis and mechanical linkage mode, that is, on the premise that the equipment runs, through transmission between gears, a self-locking pin makes contact with a wall, the action between the self-locking pin and the wall becomes larger, and when a gear plate rotates, the self-locking pin can be driven to rotate, so that the self-locking pin can be dri