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According to the requirement of automatization of drainpipe deposit cleaning work in the municipal engineering works, a kind of robot for work of drainpipe deposit cleaning has been researched and manufactured with the simulation analysis and technique of virtual prototyping. In article the composition principle and key techniques of the robot are introduced in detail, including technique of adapting and adjusting the change of pipe diameter, technique of obstacle crossing, technique of walking and driving and so on. The manufactured prototype and results of tests show that the robot possesses characteristics, such as adapting range of pipe diameter is between 400∼500 mm, the walk speed when working is 2 m/min, the drag force could reach 3000N above, and the walk distance could reach 1000 m.