Piston-type flow calibrator with built-in lead screw

摘要: The utility model provides a piston-type flow calibrator with built-in lead screw, and relates to the field of measuring. comprises cylinder, an upper end cover provided guide hole lower transmission hole. A disk-shaped piston through is arranged in fixedly connected screw nut, nut threaded connection rod, rod inserted mode, slidable hole, portion rotatable solves technical problems that existing large size difficult move. has advantages disturbance problem cylinder eliminated thickness reduced; system errors caused by amplitude gap are more reliable; mechanism does not need be specially, therefore, structure compact, small, easy carry suitable for on-site calibration; all cross sections sealed cavity completely identical use convenient.