Precast box girder square steel tube mandrel

The utility model discloses a precast box girder square steel tube mandrel divide into left side mould and right side mould and is whole through bottom and top supporting frame attach. Each side formstill includes upper and lower, side braced frame. On it, lower braced frame's both sides pterygoid lamina is rotatable to a constant angle degree after -fixing to the braced frame both ends are articulated with inclining. On, lower support rod fixes respectively last, and lower braced frame is inboard and articulated. Parallel arrangement around many core assembly mould to be connected with samemain pull rod. 本实用新型公开了种预制箱梁方钢管芯模，分为左侧模及右侧模并通过底部及顶部支撑框架连接为整体。各侧模还包括上、下、侧支撑框架。其上，下支撑框架的两侧翼板可旋转至定角度后固定，并与侧支撑框架两端铰接。上，下支撑杆分别固定在上，下支撑框架内侧并铰接。多组芯模前后平行设置，并与同主拉杆连接。