The present invention relates to an underwater robot dredger for dredging sewer pipe, more specifically, the power hose 314 and the discharge hose (334) as the dredging robot 200 moves in the underground ground to perform the dredging work underground. ) Is installed or rolled hose roll (300) and the auger screw 210 attached to the front of the dredging robot 200 to dig underground ground to form the earth and sand by the auger screw 210 and the underwater motor ( Due to the vacuum generated by operating the underwater suction pump 232, the rotary force of 230 is sucked into the suction port 220 mounted on the rear of the auger screw 210, so that the discharge hose 240 and the discharge pipe 242 are rotated. And sewage pipes, sewage culverts, sewage culverts, reservoirs, sewage treatment plants, sedimentation sites and sewers It relates to the underwater robot capable of dredging dredge dredging.;Sewer pipe, dredging, underwater robot dredger, power hose, discharge hose, hose roll
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