Air-valve composite linkage device

The utility model relates to an air-valve composite linkage device, especially an air-valve composite linkage device used for supplying and releasing air continuously in coal mine jig. The device is combined by two air-valves; two ends of the air-valve body are respectively connected with an air intake pipe and an air-discharge pipe; two ends of the upper end of the air-valve plate shaft are respectively provided with control chambers; the air-valve plate shaft is disposed between the control chambers; both ends of the air-valve plate shaft are provided with bearing seats which are fixed on the air-valve body; an air-valve plate shaft and an air-valve plate is disposed in the air intake pipe; an air-valve plate shaft and an air-valve plate is also disposed in the air-discharge pipe; both sides of the lower end of the air-valve plate shaft are disposed with air-valve plates; the bottom ends of the middle parts of the two air-valve bodies are connected with an operating room connecting tube; and the operating r