Straight-insertion tuning fork densitometer

The invention discloses a straight-insertion tuning fork densitometer. The straight-insertion tuning fork densitometer comprises an outer cover, a tuning fork assembly, a connection post and a flangedisc and also comprises a cleaning device, wherein the turning fork assembly is provided with an installation post and a tuning fork, an induction device and a detection device are arranged in the installation post, the tuning fork is arranged below the installation post, the tuning fork comprises fork bodies which are symmetric to each other, one end of the connection post is connected with the outer cover, the other end of the connection post is connected with the installation post, the flange disc is in threaded connection with the connection post and is used for matching with an installation flange on a pipeline, a convergence cavity is arranged in the flange disc and communicates with an external high-pressure spraying device, the cleaning device comprises at least one gas/liquid spraying pipe, the at least o