The invention discloses a telescopic joint for air supply of a fermenting roller. The telescopic joint is characterized in that a telescopic
pipe is arranged in a box body; one end of the telescopic
pipe is provided with a movable connecting joint, the other end of the telescopic
pipe is provided with a fixed connecting joint, and the movable connecting joint and the fixed connecting joint are respectively arranged outside the box body; a pneumatic device is arranged in the box body, is connected with the telescopic pipe, and is used for driving the movable connecting port of the telescopic pipe to extend out of the box body and be connected with an air supply
assembly joint outside the fermenting roller, and driving the movement connecting port of the telescopic pipe to retract into the box body and be disengaged from the air supply
assembly joint outside the fermenting roller; an
electric control device is arranged in the box body, and is matched with the pneumatic device to precisely control and drive the movable connecting port of the telescopic pipe to be butted with the air supply
assembly joint outside the fermenting roller. The telescopic joint has the
advantage that the fixed air blowing equipment and the dynamic fermenting roller are connected, so as to connect with the air supply assembly outside the fermenting roller, perform self-control air ventilating on the fermenting roller, and automatically complete the production process.