Drainage device for municipal engineering

The utility model relates to the technical field of municipal drainage, in particular to a drainage device for municipal engineering. The drainage mechanism is installed on the adjusting mechanism, and the drainage mechanism is matched with the adjusting mechanism to automatically adjust the drainage flow according to the water flow; the adjusting mechanism comprises a mounting cylinder, a moving-lifting groove is formed in the side wall of the mounting cylinder in a penetrating mode, and a side moving groove is fixedly formed in the outer wall of the moving-lifting groove in a fixed sealing mode. A water receiving barrel is movably arranged in the mounting barrel, and a bearing frame is fixedly mounted on the side wall of the bottom of the water receiving barrel. The internal weight of the water receiving barrel is increased, so that the water receiving barrel descends, the descending water receiving barrel descends a first vertical toothed plate, the descending first vertical toothed plate is meshed with a