Pneumatic valve device

The invention relates to the technical field of pneumatic valve control, in particular to a pneumatic valve device. The pneumatic valve device comprises a pneumatic valve, a control system, an air storage tank and an automatic valve closing assembly. The pneumatic valve is provided with a first air hole and a second air hole, and the pneumatic valve is closed under the condition that air enters the first air hole and exhausts the air from the second air hole; and the pneumatic valve is opened under the conditions of air intake of the second air hole and air exhaust of the first air hole. The control system is used for controlling opening or closing of the pneumatic valve, namely the control system controls an air path of the pneumatic valve to achieve opening or closing of the pneumatic valve. Gas is stored in the gas storage tank, and the automatic valve closing assembly is used for communicating the gas storage tank with the first gas hole under the condition that the control system fails, so that the gas i