Butterfly valve shaft system double-clamping positioning structure

The utility model discloses a butterfly valve shaft system double-clamping positioning structure, which belongs to the field of butterfly valve positioning and comprises a stabilizing sleeve, a first threaded column is sleeved on the side surface of the stabilizing sleeve in a threaded manner, an end cover is sleeved outside the first threaded column in a threaded manner, a sealing sleeve is fixedly sleeved inside the stabilizing sleeve, and a sealing ring is fixedly sleeved on the side surface of the stabilizing sleeve. A first long shaft is arranged in the stabilizing sleeve. By arranging the long shaft positioning ring, when the butterfly valve is assembled, the first long shaft and the second long shaft are limited through the long shaft positioning ring and the clamping ring, so that a positioning step is additionally arranged when the first long shaft and the second long shaft are assembled, the long shafts are more convenient to position, and the problems that most butterfly valves are assembled in a l