Mechanical tee joint

The utility model discloses a mechanical tee joint. A mechanical tee joint comprises an upper half tile, a sealing ring, a U-shaped bolt, a hexagon nut, an O-shaped ring, an annular gasket and an opening gear ring, and lug plates at the two ends of the upper half tile are provided with opening grooves matched with two vertical screw portions of the U-shaped bolt respectively. The device is arranged on the top face of the outer side groove wall of an opening groove of each lug plate at the two ends of the upper half tile body, a sunken annular groove with the L-shaped vertical section is formed in the inner side of the end face of an end opening of the upper end of a guide cylinder of the upper half tile body, and external threads are arranged on the outer surface of the guide cylinder; the device further comprises an open toothed ring extruding and fastening device which is a hexagonal joint nut. The branch pipeline section and the main pipeline section are directly installed conveniently, threads or grooves