Introduction to the working principle of sanitary manhole cover

Hygienic manhole cover working principle When it is necessary to repair the piggy bank, first unscrew the hand wheel (for fixing the hole cover and providing the axial sealing force), and then open the manhole with the handle fixed on the manhole cover. The cover (the manhole cover is connected to the frame by a hinge to ensure that the manhole cover is closed accurately when closed, and the hinge can limit the open manhole cover to an angle of 30 degrees above the vertical position), so that the maintenance personnel can access the inside of the tank Inspection is carried out; when the manhole cover is closed, a complete seal between the manhole cover seal and the can body is ensured, thereby avoiding material leakage in the can.