Backwashing system of heat supply heat metering chamber

The utility model provides a backwashing system of a heat supply heat metering chamber, and relates to the technical field of heat supply equipment. The system comprises filters, valves, a water inlet pipeline and a water return pipeline, the filters are arranged on the water inlet pipeline and the water return pipeline respectively, the valves are arranged on the water inlet pipeline and the water return pipeline respectively, each valve comprises a stop valve, a flange ball valve and a bypass valve, and each filter comprises a filter pipe body, a filter screen, an internal thread ball valve and an electromagnetic rod. The filter screen is arranged in the filter pipe body, the internal thread ball valve is connected with a flange cover on the filter pipe body, the electromagnetic rod is in threaded connection with the internal thread ball valve and is connected into the filter screen, the electromagnetic rod and the filter screen are matched to adsorb scrap iron, and impurities in the filter are cleaned duri