The research status of pipeline robot is discussed,and the performance of several typical pipeline robots is compared and analyzed The innovative design of a suitable small pipeline cleaning in cleaning robot.The device is composed of motor,crawler,diameter adjusting mechanism and a cleaning mechanism.The cable transmission signal,control robot in pipe robot;regulation the diameter size adjusting mechanism,adapt to different diameter change.The robot can be used in series two,adjust the clean strength,with the pressure rod device to adjust the brush head pressure,enhance the cleaning effect,su...