The rubber disc is a bell shape with a circular hole in the center, and the outer edge of the bell shape has a flange. The movable pallet is a disc, which is sleeved on the air duct; there are two protruding rings with different diameters on the disc, and the two rings are just matched with the outer edge of the rubber disc and its flange Groove; adjusting the pressure between the movable pallet and the rubber plate can change the tightness of the fit, thereby changing the size of the bubble; the outer edge of the movable pallet falls on the outer edge of the disc body.
There are positioning screws and a hexagonal body on the plate body, and a thread is connected to the air supply pipe at the bottom. When assembling, after adjusting the contact pressure between the movable support plate and the plate body, fix the air duct and the plate body with the positioning screw to ensure the good aeration quality of each waste water diffuser. The hexagon at the bottom of the plate is used for wrench assembly and disassembly.