Flow measuring device of volumetric liquid chromatograph

The invention belongs to the technical field of chromatographic instrument flow detection, and particularly relates to a volumetric liquid chromatograph flow measuring device which comprises a mounting frame with an inwards-concave front face, a volumetric tube is fixed to the top of the mounting frame in a penetrating mode, a supporting ring is slidably connected into the volumetric tube, and by adjusting the number of balancing weights, the flow of the volumetric liquid chromatograph can be measured. The magnitude of force transmitted to the guide block by the pull rope is changed, so that the magnitude of stress is constant in the moving process of the supporting ring and the annular rubber plug, pumping out of liquid of the pump under the actual working pressure can be better simulated, the effect is better, meanwhile, after single-time measurement, an electromagnetic valve is opened, flowing out of the liquid in the volume tube is accelerated under the action of thrust, and the accuracy of measurement is