I. Introduction: Driving type scraper is suitable for removing drainage works in stratospheric sand basin sludge and scum, sludge settling at the bottom of the set to scrape the mud tank, and the tank surface dross skimming to set the slag tap. Second, the principle: scraper by the traffic, scraping mud rake, skimming, driving until the component device and automatic control cabinet. Depending on the requirements set trough mud, residue collection tank can be provided at the same end or both ends of the sub-sedimentation tank scraper working process is as follows: 1, located at one end with two slots: scraping mud rake decline, skimming board decline → scraper by the pool side (water side) starting point to mud, slag tap end with the sludge, scum scraper set delivery until the end (inlet end) → scraping mud put on the rake, skimming board mentioning → scraper terminal to the beginning of the change to the starting end with → Upon arrival shutdown or another cycle. 2, is divided into two slots at both ends: scraping mud rake down the board skimming mention → scraper with mud trough end to end by the start point of the water. The sludge scraper set delivery until the end → scraper mention the skimmer plate rake decline → scraper commutation with the scum skimming the scum tank → arrive after the beginning of the end of another cycle down or scum. Third, the device features: 1, large capacity, can save area. 2, the device scraping, suction, scraping scum at the same time, energy consumption, energy-saving equipment with the specifications than about 50%. 3, synchronized high concentration of activated sludge scraper, suction, scraping sets, good mud effect. 4, scraper suction port structure is simple, easy to plug, safe and reliable operation, easy maintenance. 5, adaptable, and easy to achieve automatic control.