On-line calibration device for open channel flowmeter

The invention discloses an on-line calibration device for an open channel flow meter, relates to the technical field of flow metering equipment, and mainly aims to provide the on-line calibration device for the open channel flow meter, which can be used for carrying out on-line calibration on the open channel flow meter. According to the main technical scheme, the on-line calibration device for the open channel flowmeter comprises a measuring component, a water inlet hole is formed in the bottom of a measuring cylinder, the cylinder is provided with a first cavity, a fixing rod is arranged in the first cavity, a floating ball is arranged on the fixing rod in a sliding mode, a display component is arranged on the top of the cylinder, and a mounting component is arranged on the outer side face of the cylinder; the supporting component and the transducer are longitudinally and uniformly arranged on one side of the fixing plate, one end of the guiding component is connected to the fixing plate, the guiding compon