Square tube outer surface water stain cleaning device

The utility model discloses a cleaning device for water spots on the outer surface of a square pipe. Square tube conveying frame, the upper end of the square tube conveying frame is fixedly connectedwith two conveying rollers; the two conveying rollers are arranged on the square pipe conveying frame side by side from front to back. The lower end of the square pipe conveying frame is fixedly connected with inner supporting pipes. The inner supporting pipe is arranged between the two conveying rollers; a right-handed screw is inserted into the inner supporting pipe; the right-handed screw is insliding connection with the inner supporting pipe; the left end of the right-handed screw is fixedly connected with a left-handed screw; the left-handed screw is also in sliding connection with the inner supporting pipe; the right-handed screw rod and the left-handed screw rod are in threaded connection with limiting nuts; the right-handed screw and the left-handed screw rotate to drive the two limiting nuts to move close