Bolt connecting system for curtain wall closed cavity cross beam and stand column

The utility model provides a bolt connection system for a curtain wall closed cavity cross beam and a stand column, which aims to solve the problems that the cross beam needs to be designed into an open cavity form and an open cavity sectional material affects the bearing capacity and the overall impression effect of the cross beam in the self-weight direction when the cross beam and the stand column are connected through a traditional corner connector, and comprises the cross beam, the stand column, a cross beam insertion core, a bolt and a pin. The cross beam and the stand column are each provided with a square through cavity, the cross beam insertion core comprises a rectangular frame matched with the square through cavities of the cross beam, an upper mounting base, a lower mounting base and cylindrical grooves, the upper mounting base and the lower mounting base are arranged on the upper side and the lower side of the interior of the rectangular frame respectively, and through holes corresponding to the