Pressure-adjustable two-way locking device for automatic air door

The utility model discloses a pressure-adjustable automatic air door two-way locking device which comprises an air door body and further comprises a pressure ventilation pipe arranged on one side of the air door body, an air supply pipe is arranged on one side of the pressure ventilation pipe, a filtering device is arranged on the air supply pipe, a pressure adjusting valve is arranged on one side of the filtering device, and a three-way coupling is arranged on one side of the pressure adjusting valve. A four-way control valve is arranged below the three-way coupling, a universal shaft is arranged above the three-way coupling, a fixing plate is arranged on the universal shaft, a push-pull cylinder is arranged on one side of the fixing plate, an air outlet connector is arranged at one end of the push-pull cylinder, and an air inlet connector is arranged at the other end of the push-pull cylinder. Air pressure is large, opening is difficult, opening and closing of an air door are time-consuming and labor-consum