Rotary Drilling Rig (SR420II)

SR420II rotary drilling rig With anti-shock truss-structure mast and crowd winch feeding system which provides longer crowd stroke and stronger feeding force, SR280RII rotary drilling rig can drill in the rock stratum with uniaxial compression strength not exceed 100Mpa and drillability below grade 8. Electrical system Rotary drive multi-gear control: High working efficiency and energy-saving. Rotary drive multi-gear control includes four models: Rock drilling, standard, energy-saving and soil-dumping, to adapt to different working conditions. Automatic crowding control system: High frequency controlled crowding system includes three gears, they are high speed, middle speed and low speed, select gear accordingly can effectively increase working efficiency. Auxiliary wireless control system: Reduce labor intensity and improve construction safety. Mast standing/lowering remote controller: Remote controlled mast standing/lowering helps to increase operation safety. GPS Remote Monitoring: Realize remote customer support with wireless transmission of data. 3G communication technology greatly increases the transmission speed and transmission capacity. Realize remote recording and fault diagnosis with complex fault diagnosis algorithm. M2M fleet service. GPS, wireless networks, mobile link. Hydraulic System Main winch automatic releasing control: Improve construction efficiency: Releasing speed increases by 50%. Main winch wire rope releasing adopts hydraulic confluence technology, which greatly increases the releasing speed and decrease ineffective working time. High/Low speed rotary drive crowding and hoistin: Achieve fast rotary drive crowding and hoisting: The hydraulic oil for rotary drive crowding and hoisting is supplied by exclusive pump and valves, which can easily achieve switching between high and low rotary drive hoisting speeds. High speed mode triples common hoisting speed, decreases ineffective working time. Considering one time drilling process, it can save time by 25%. Safety equipments: Various safety equipments provide comprehensive Ground touching protection: Prevent the wire rope from disordering when the main winch is rapidly releasing. When the drilling bucket is released to the pile hole bottom, controller of the hydraulic system automatically cuts oil supply to the main winch motor, avoids wire rope disordering cased by over-releasing. Mast verticality control technology: With real time mast angle information comes from the mast sensors, controller automatically adjusts mast verticality and ensures construction accuracy. Superior Intelligence Fault diagnosis system: Diagnostic device checks the parameters of diesel engine, hydraulic system and control system, and judges whether the machine is working at normal condition, if any fault appears, it takes corresponding measures like stop the engine and so on to avoid further damage. Close-loop control brings optimized power matching between diesel engine and pump, close-loop control of rotary drive rotation and motor flow capacity ensures intelligent matching between output torque and crowding force, and close-loop controlled crowding force reduces teeth wearing and realizes auto crowding. Whole machine control adopts pilot control system. Reliable pilot logic valve controls all the actions of the rig and mostly increases operation convenience and safety. Mechanical structure Wide application range, high reliability Considering the high gravity center and heavy weight, undercarriage adopts reinforced slew bearing to ensure stability while mast standing and lowering. Machine welded and high strength steel, undercarriage frame fulfils complicated rotary drilling requirements. Reasonable designing makes the best of robust Caterpillar diesel engines output. Pumps like Caterpillar guarantee plenteous power supply at all the time. Unit Parameters Max. output torque kN.m 420 Max. drilling dia mm 3000 Max. drilling depth M 110 Drilling Speed rpm 5-20 Max.push kN 380 Max. pull kN 380 Crowd stroke mm 8000 Main winch pull (1st layer) kN 435 Main winch line speed m/min 46 Main winch wire rope dia. mm 40 Aux. winch pull (1st layer) kN 90 Aux. winch line speed m/min 94 Aux. winch wire rope dia. mm 28 Mast sideward °±3 Mast forward ° 5 Mast safety backward ° 15 System pressure Mpa 35 Chassis model CAT336C Crawler width mm 1000 Crawler height mm 1190 Chassis length mm 7932 Operation height mm 28500 Operation width mm 5500 Transport length mm 19270 Transport width mm 3900 Transport height mm 3773 Traction force kN 896 Total weight (with standard Kelly) ton 148 Engine CAT C-15 Engine power 380kW/1800rpm Style 4-storke, water-cooled, overhead value type and electronic injection Intake form Turbocharged, inter cooling Fuel Diesel oil Emission regulation EU stage III/EPA Tier 3 Displacement 15.2L/928in3