Air tightness detection device for pneumatic element joint

The utility model discloses an air tightness detection device for a pneumatic element joint, and relates to the technical field of pneumatic element detection, in particular to the air tightness detection device for the pneumatic element joint, which comprises a bedplate, a bearing seat is fixedly connected to the middle of the upper surface of the bedplate, and a rotating shaft is rotatably connected to the middle of the bearing seat. The bottom end of the rotating shaft penetrates through the platen downwards and is fixedly connected with a driven gear. Through cooperative arrangement of a sealing limiting sleeve, a ventilation sealing sleeve, a compression spring and a downward pressing air cylinder, the air tightness detection device of the pneumatic element connector has the effects that communication of compressed air and water feeding and discharging of the pneumatic element connector are automatically completed, and then the detection efficiency can be improved; through cooperative arrangement of the