Side-opening double-leaf two-way opening and closing steel fireproof door and manufacturing method thereof

The invention discloses a side-opening double-leaf two-way opening and closing steel fireproof door and a manufacturing method thereof. The fireproof door comprises a steel doorframe and steel door leaves. When the door is used, the steel doorframe is fixedly connected to the wall of a tunnel and forms the external boundary of the fireproof door. The door leaves include a first door leaf and a second door leaf which are connected to the doorframe through a steel sleeve hinge structure in a rotary manner; the steel sleeve hinge structure comprises a steel frame sleeve hinge sleeve fixedly connected to the doorframe, a steel leaf sleeve hinge sleeve fixedly connected to the door leaves and a steel sleeve hinge cylinder which penetrates through the frame sleeve hinge sleeve and the leaf sleeve hinge sleeve; and two ends of the sleeve hinge cylinder are fixedly connected to the doorframe. The fireproof door not only ensures driving safety in the tunnel but also ensures enough evacuation capability. The doorframe and the door leaves are connected with each other in a rotary manner through the sleeve hinge structure, and through the sleeve hinge structure, the requirements of side opening and opening and closing in two ways are reached; when the door leaves rotate around the sleeve hinge cylinder, the rotation angle is bigger than or equal to 180 degrees; and in such way, the evacuation requirement in the bidirectional tunnel can be satisfied.