SR280M Rotary Drilling Rig

Specifications

SR280M Rotary Drilling Rig

• CFA and Kelly can be respectively realized via replacement of working equipment;casing oscillator is optional;
• The unique truss type anti-vibration mast oplimizes the system stability by frequency resonance technology.It has more bending resistance,compressive and vibration absorbing ability;
• The big torque rotary drive with special lubricating system makes sure that it can work in high—temperatu re environment,which is available in three drilling modes : standard,low speed and big torque,or high speed and small torque;
• Special pulley yoke raises main winch pull notably;
• The main winch has functions of touch—bottom protection and priority control;fast line speed is optional;
• Auger has the features of reliable connection,large rigidity,good wearing resistance and fine sealing;the unique double—layer core tube design not only increases auger strength,also guarantees smooth concrete conveyance,thereby enhancing construction efficiency;
• Auger extension can increase hole depth on the premise of non—add auger;
• The hydraulic auger cleaner can clean the auger effectively to reduce labor cost;
• The bottom arm equipment can stabilize the long auger during operation to ensure the exact hole position and verticality;
• The support system in the mast end guarantees the whole machine stability during operation;
• The valve at the bottom of auger can prevent drillil bits entering concrete pipe during operation. When drilling pipe is taken out and concrete grout is injected,the valve will be opened;
• The rotary drive multi—purpose key bushing facilitates the replacement of Kelly bar  adn CFA;the removeble and symmetrical key structure doubles key's service life;
• Low vibration,low noise and low pollution to meet the high standards of city pile foundation construction.