Nitrogen injection mechanism of physical foaming machine

The utility model relates to the field of nitrogen injection mechanisms, in particular to a nitrogen injection mechanism of a physical foaming machine, which comprises a mounting bracket, a lifting bracket, a connecting bracket, a sliding bracket, a rotating motor, a telescopic rod, a transmission shaft, a control valve, a fastener, a sliding limiting piece and a connecting interface, the top of the sliding support is rotationally connected with a rotating motor. The rotating motor is slidably connected with the connecting bracket; by means of an automatic control mode, a worker can be far away from a control valve site, the telescopic rod drives the control valve to press downwards, the device can be automatically connected with a raw material tank, and therefore the connection stability of the device is guaranteed, and the device can be prevented from being accidentally loosened through the buckle piece on the side face; the control valve is controlled through the rotating motor, accurate control over the v