Enlargement type horizontal auto-backwash viscose filter

The utility model discloses a large-sized horizontal backflushing glue filter with the structure of three filter drums. The necessary room required by the axis direction is reduced when the glue filter is installed or the filter drum is drawn out or replaced, which raises the utilization rate of the workshop. The filter flow would be raised 40% in the same room comparatively. The spiral curve distribution mode of the filter holes on the filter drum would decentralize the abrasion from the filter holes to the piston sealing ring. The service life of the strainer is prolonged and the abrasion of the piston sealing ring is decreased. The glue filter includes an external housing, a filter drum and a piston. The cavity inside the drum is communicated with the admitting pipe of the original liquid. The hollow piston spindle, the master screw and the nut are arranged on the end covers on both sides. The master screw is connected with the electrical motor by a speed reducer. The filter drum is composed of three sections. Two or three piston sleeves are arranged on the hollow piston spindle. The outside housing is arranged inside the end covers of the two sides. A left piston sleeve is arranged between the pistons. The filter holes on the drum are distributed in spiral curve. The utility model can be widely used in the filtering process of the glue liquid in the chemical fiber industry.