Valve controlled pond water quality automatic purifying device

The utility model relates to a valve controlled pond water quality automatic purifying device, chiefly comprising a filter pot 18, a water level controlling device 15, a water pump 3, a water pump suction pipe 2, a filter pot water inlet pipe 4, a filter pot water outlet pipe 19, and a drainage pipe 23. The connecting position of the upper end of the filter pot 18 and the drainage pipe 23 is provided with an electric valve 25; the filter pot water inlet pipe 4 is connected with an ozone filling ejector 16; the ozone filling ejector is connected with an ozone generator 13; a back flushing pond 8 is provided above a pond 20, and the upper part of the back flushing pond 8 is connected with a water outlet pipe 24 accessing to the pond 20; the water outlet of the filter pot water outlet pipe 19 is connected with the lower part of the back flushing pond 8. The valve controlled pond water quality automatic purifying device of the utility model can pump the water in the pond to the filter pot to make the filtration to filter the foreign matter; simultaneously the ozone is added to make the disinfection to largely improve the quality of the drinking water; The device also can periodically and automatically proceed the back flushing, which causes the operation of the device to keep the optimum state. The device is especially suitable foe the water quality self-cleaning of the secondary water supply in the town.