Device for synchronously grading and sampling multi-particle-size micro-plastics in water body

The utility model discloses a device for synchronously grading and sampling multi-particle-size micro-plastics in a water body. The device comprises a sampling pipe communicated with water to be sampled, a flow meter positioned on the sampling pipe and a multi-stage screening device communicated with the sampling pipe, the multi-stage screening device comprises a shell; wherein a water inlet is formed in the top of the shell, a water outlet is formed in the bottom of the shell, a plurality of groove-shaped screens are arranged in the shell side by side from top to bottom, the mesh diameters ofthe groove-shaped screens are sequentially decreased, and the groove-shaped screens are all located under the water inlet. According to the utility model, by adopting the multi-stage screening devicewith the multi-stage groove-shaped screens with different mesh apertures, the purpose of simultaneously collecting micro-plastic particles with different particle sizes in a grading manner is achieved, and the sampling effici