Bridge height limiting device for highway engineering

The utility model relates to the technical field of highway engineering, and discloses a bridge height limiting device for highway engineering, which comprises a base, the upper surface of the base is fixedly connected with a vertical rod, the interior of the vertical rod is slidably connected with a moving rod, the upper surface of the moving rod is fixedly connected with a top plate, and the middle part of the outer wall of the top plate is fixedly connected with a warning board. A liquid separator is fixedly connected to the upper surface of the top plate, a connecting rod is fixedly connected to the upper surface of the liquid separator, a collecting box is fixedly connected to the upper surface of the connecting rod, a filter screen is arranged in the collecting box, a water pipe is fixedly connected to the bottom end of the collecting box, and an electromagnetic valve is arranged in the water pipe. And the outer wall of the water pipe is fixedly connected to the interior of the liquid separator. Accordi