Self-cleaning duplex filter

The utility model relates to a self-cleaning duplex filter, which solves the problem of low material filtering efficiency caused by replacement after stopping feeding in the prior art. A self-cleaning duplex filter comprises a filter cartridge, a feeding pipe is arranged in the filter cartridge in a penetrating mode, a temporary filter is arranged at one end of the feeding pipe through a mounting mechanism, a bearing ring is fixedly connected to the interior of the filter cartridge, a semicircular fixing ring is slidably connected to the interior of the filter cartridge, and the fixing ring is located at the top of the bearing ring; a folding ring is rotationally connected between the two ends of the fixing ring, and a filter bag is fixedly connected between the fixing ring and the bottom of the folding ring. The filter bag can be automatically replaced and cleaned under the condition that feeding is not stopped, and the filtering efficiency of materials is not affected. 本实用新型涉及一种自洁式双联过滤器，解决了现有技术中停下进料进行更换导致材料