Duplex filter convenient for quickly replacing filter element

The duplex filter comprises a filter body and a servo motor, a connecting circular ring is arranged on the outer wall of the top of the filter body, the top of the connecting circular ring is connected with an end cover, the bottom of the end cover is connected with a clamping block, a clamping groove is formed in the inner wall of the connecting circular ring, and the clamping block is connected with the clamping groove. The inner wall of the clamping groove is connected with a protection box, a spring is installed in the protection box, and one end of the spring is connected with a protruding block. The duplex filter convenient for quickly replacing the filter element is provided with a servo motor, a rotating shaft, a gear, an outer cylinder, a screw connecting sleeve and a filter element body, in the use process, the servo motor is started to drive the rotating shaft to rotate, so that the gear on one side of the rotating shaft rotates, and then the outer cylinder on the inner wall of the gear is driven t