Sampling device for water conservancy project

The utility model is applicable to the technical field of hydraulic engineering, in particular to a sampling device for hydraulic engineering, which comprises a box body and a box cover, a lifting mechanism is arranged outside the box body, a piston cylinder is arranged inside the box body, the upper end of the piston cylinder is open, the lower end of the piston cylinder is closed, and a water inlet pipe is arranged at the bottom of the piston cylinder and penetrates through the box body. A piston is slidably connected into the piston cylinder, the piston is connected with a pushing assembly, the pushing assembly is used for driving the piston to move up and down, a plurality of water outlet pipes are arranged on the side wall of the piston cylinder, the connecting positions of the water outlet pipes and the piston cylinder are located at different heights, and collecting pipes are arranged at the ends of the water outlet pipes. Flow valves are arranged on the water outlet pipes; according to the device, by