U-rib weld joint rust removal equipment

The invention provides U-rib weld joint derusting equipment which is used for entering a U-rib to derust a top corner joint and comprises a rack, a U-rib weld joint derusting device and a U-rib weld joint derusting device. The laser derusting mechanism is mounted on the rack and is used for performing laser derusting on the upper side angle seam in the U-shaped rib; the walking mechanism is installed on the machine frame and used for driving the machine frame and other parts installed on the machine frame to move, the laser rust removal equipment is conveyed into the U rib of the existing bridge through the walking mechanism and moves in the U rib, laser rust removal is conducted on the fillet weld of the U rib through the laser rust removal equipment, and therefore rust attached to the position of the weld is removed; repair welding can be conveniently carried out on the interior of the U rib after rust removal, the overall structure of the steel bridge is reinforced practically, the strength of the bridge b