Portable columnar sampling device for bottom mud in lake or river

The utility model provides a portable columnar sampling device for bottom mud in a lake or a river. The bottom mud in the lake or the river is an important content in water environment protection and scientific research. The collection of bottom mud samples is the premise of the bottom mud research work. At present, a bottom mud sampling device is mainly a digging-type sampling device at home and abroad. The digging-type sampling device is poor in enclosed sealing performance, and large in disturbance to samples, and can only collect surface bottom mud samples. The portable columnar sampling device comprises a sampling pipe (1), wherein the upper end of the sampling pipe is inserted in a silicon ring (2) which is arranged between a support disc (3) and a pressing cover (4). A cover plate (6) is fixedly arranged on the support disc through screw rods (5). The screw rods penetrate through the cover plate and the support disc and the cover plate in sequence, and a lifting rod (7) penetrates through the cover plate, and is connected with a sealing piece (8). The portable columnar sampling device is used for collecting the bottom mud in the lake or the river.