Variable-aperture filtering device

The utility model discloses a variable-aperture filtering device which comprises a filtering mounting frame assembly, comprising a mounting frame, a feeding pipe communicated with the top surface of the mounting frame, a discharging pipe communicated with the side surface of the mounting frame, an electrostatic spinning filter screen mounted in the mounting frame, and a slag discharging pipe and an aperture adjusting assembly which are communicated with the bottom surface of the mounting frame. A traditional sewage treatment filtering structure is optimized, filtering is carried out through the arranged electrostatic spinning structure, fine particles in alkali liquor can be rapidly adsorbed through the novel nanometer synthetic fiber adsorption technology, impurities and suspended solids can be removed in a divided and deep-layer mode, efficiency is high, and through mutual cooperation of the arranged aperture adjusting structures, the purposes that power is cut off when blocking occurs, and the filtering ef