Height-adjustable combined circular ring gasket

The utility model relates to the technical field of circular ring gaskets, in particular to a height-adjustable combined circular ring gasket, which adopts the technical scheme that the height-adjustable combined circular ring gasket comprises an upper circular ring gasket, a first opening is formed in the inner wall of the upper circular ring gasket, and an adjusting device for adjusting the height of the upper circular ring gasket is mounted on the inner wall of the upper circular ring gasket; the utility model has the beneficial effects that the thread, the threaded rod, the circular ring supporting sheet, the third open hole, the circular ring lower gasket and the circular ring upper gasket are arranged, so that the circular ring supporting sheet is sleeved on the threaded rod on the circular ring lower gasket, and the opening of the threaded pipe at the bottom of the circular ring upper gasket is aligned with the threaded rod on the circular ring lower gasket; the circular ring upper gasket and the circu