The utility model relates to the field of detection devices of valves, in particular to an
air tightness detection device of a
brass exhaust valve, which comprises an air source
machine, a
barometer, a
cam divider and a division disc, the division disc is arranged on an output shaft of the
cam divider, and a circle of surrounding part clamping holes are arranged on the division disc by taking the output shaft as the center. The device is characterized in that one part clamping hole serves as a detection position, an
air pump located on the outer edge of the segmentation disc is arranged in the radial direction of the detection position, a plugging air cylinder is arranged under the detection position, a plugging
pipe is arranged at the front end of a cylinder shaft of the plugging air cylinder, a
barometer is arranged on the plugging
pipe, and a pressing air cylinder is hung over the detection position. When the pressing air cylinder is pressed downwards, the front end of a cylinder shaft of the pressing air cylinder acts on the
brass exhaust valve in the part clamping hole. Compared with the prior art, the
brass exhaust valve does not need to be soaked in water and is kept dry all the time, detection procedures are reduced, procedures are saved, product
delivery efficiency can be better improved, the detection speed is high, and the accuracy rate is also high.