Glass fiber roll frame with diameter adjusting structure

The utility model discloses a glass fiber roll frame with a diameter adjusting structure, which comprises mounting frames, the mounting frames are of rectangular plate structures, the bottom ends of the mounting frames are in butt joint with one end of a mounting plate, the two ends of the mounting plate are respectively connected with one mounting frame, one end of a positioning rod is arranged on the inner wall of each mounting frame, and the other end of the positioning rod is connected with the diameter adjusting structure. An auxiliary rotating wheel is clamped and connected to one side of the positioning rod; the first vent pipe is arranged on the positioning rod, positioning rings are rotationally connected to the interiors of the two ends of the positioning rod, and second vent pipes are symmetrically arranged in the positioning rings and penetrate through the interior of the positioning rod to be communicated with the first vent pipe. According to the glass fiber roll frame with the diameter adjustin