The invention discloses a bridge frame air
pipe pre-embedded control device. The device comprises a square
pipe, limiting plates, a bottom plate, a connecting block and a rotating rod, wherein the two limiting plates are installed at the two ends of the square
pipe in a sliding mode, the bottom plate is vertically installed at the bottoms of the limiting plates, the connecting block is installed in the middle of the side face of the square pipe, the rotating rod is rotationally installed in the connecting block, the two ends of the rotating rod are connected with the limiting plates through threads, and the two sections, located at the two sides of the connecting block, of the rotating rod are provided with forward threads and reverse threads correspondingly; and at least two hollow pipes are installed on the upper surface of the square pipe, limited pillars are clamped in the hollow pipes, and the limited pillars are pre-embedded in a bridge frame. The device is convenient to
mount, and the problems that in the prior art, the angle cannot be controlled during air pipe mounting, the operation difficulty is high, the
butt joint speed is low, and the support is inconvenient to dismount can be effectively solved.