Correcting device for electromagnetic flowmeter

The correcting device comprises a workbench, a first supporting frame is welded to the right side surface of the workbench, the surface of the first supporting frame is connected with an electromagnetic flowmeter to be measured, the right side face of the electromagnetic flowmeter to be measured is connected with an installation ring, and the inner surface of the installation ring is fixedly connected with a reinforcing rib. The middle of the left side face of the reinforcing rib is fixedly connected with a first connecting rod, the first connecting rod is connected with a cleaning assembly, the left side face of the to-be-tested electromagnetic flowmeter is connected with a connecting pipe, the left side face of the connecting pipe is connected with a standard electromagnetic flowmeter, and the left side face of the standard electromagnetic flowmeter is connected with a water outlet pipe. The water outlet pipe is in threaded connection with the left side face of the water storage tank, and a water pumping as