The invention discloses an automatic automobile braking line
air tightness detecting device and a detecting method thereof. The automatic automobile braking line
air tightness detecting device comprises an air inlet
pipe, a testing
pipe and an exhausting
pipe, wherein the air inlet pipe comprises a
compressed air source, a first
magnetic valve and a first
pressure sensor, the testing pipe comprises a second
magnetic valve and a second
pressure sensor, and the exhausting pipe comprises a third
magnetic valve. The
air tightness is detected by adopting a
differential pressure method and combiningwith a
soap lather detection method and an automatic
carbon dioxide air tightness detecting method. Automatic automobile braking line air tightness detection is achieved, meanwhile the testing pipe number can be set according to the production demand, the detecting efficiency and precision are improved, and the demand for automatic detection during large-scale production is met. Compared with a direct
voltage method adopted for manual detection, the
differential pressure method can effectively decrease
system errors and errors caused by
environmental change. In addition, compared with a traditional
differential pressure method, a comparison workpiece is not needed, a device structure is simplified, and the limitation that a leakage point is sought by adopting a traditional
soap lather detection method is made up.