An inside and outside second grade of straining filters self -cleaning filter

The utility model provides an inside and outside second grade of straining filters self -cleaning filter, is including being used for constituting seal shell, sewage suction pipe and the drive arrangement of filter chamber, the casing in be provided with the first order and strain a section of thick bamboo and strain a section of thick bamboo with the second level, an inner chamber intercommunication is strained to water inlet and the first order, water is strained an inner chamber through the first order and is got into a first order and strain an exocoel and realize a level filtering, the second level is strained section of thick bamboo cover and is established and strain a section of thick bamboo in the first order and outer and strain an exocoel with the first order and keep apart into the second level and strain an inner chamber and strain an exocoel with the second level, water is strained an inner chamber entering second level through the second level and is strained an exocoel realization second grade