Height-adjustable overflow weir device of concentration box

The utility model discloses a height-adjustable overflow weir device for a concentration tank, which particularly relates to the technical field of environmental protection equipment and comprises a tank body, a main pipe is arranged in the tank body, water outlet pipes are arranged at two ends of the main pipe, and one end, far away from the main pipe, of each water outlet pipe is fixedly communicated with the tank body. A movable mechanism and a positioning mechanism are arranged between the water outlet pipe and the main pipe, the movable mechanism is located at the top of the positioning mechanism, a plurality of supporting pipes are arranged on the rear side of the main pipe, the bottoms of the supporting pipes are provided with the same channel steel, the supporting pipes are connected with the channel steel through pipe hoops, and an electric push rod is hinged to the top of the channel steel. The water decanter is driven by the electric push rod to descend or ascend, so that the effect of continuously