Self-cleaning vibrating tube densimeter calibrating device and calibrating and cleaning method thereof

The invention belongs to the technical field of densimeter verification, and particularly relates to a self-cleaning vibrating tube densimeter verification device and a verification cleaning method thereof.The verification device comprises a standard vibrating tube densimeter and a to-be-tested vibrating tube densimeter which are arranged in a constant-temperature box, and further comprises a constant-temperature tank containing density standard liquid, a cleaning tank, a high-pressure gas source and a waste liquid barrel; the self-cleaning vibrating tube densimeter calibrating device is convenient to calibrate, and can calibrate a plurality of groups of densimeters to be calibrated at the same time, so that the working efficiency is improved; the device has a cleaning function, and can clean pipelines in the device at the first time after the densimeter verification work is completed, so that the device can verify the next batch of samples as soon as possible; by arranging a plurality of thermostatic baths a