KJ421 tunneling drill rig
The KJ421 full hydraulic tunneling drill rig is suitable for tunnel boring operations with a section of 16-68 square meters. It can drill vertical, inclined and horizontal blast holes and bolt holes.
Product Description
The KJ421 full hydraulic tunneling drill rig is suitable for tunnel boring operations with a section of 16-68 square meters. It can drill vertical, inclined and horizontal blast holes and bolt holes.
The drill carriage adopts two sets of rectangular coordinate universal drill arms arranged symmetrically, and the propelling beam is turned over 360 degrees and automatically leveled to facilitate quick and convenient drilling positioning. The drill boom can also be used for lateral opening of stone gates and bolt drilling operations.
The arrangement of the drill rig ensures that the driver has a good view. The layout is balanced, and the powerful four-wheel drive articulated chassis ensures flexible, fast and safe driving in narrow lanes.
The high-frequency percussion rock drill uses stepped pistons to optimize the shock wave transmission efficiency, increase the drilling speed , reduce the consumption of drilling tools and improve the integrity of the equipment.
The spacious working space and a series of automatic functions help the driver to concentrate on drilling safely , quickly and accurately.
All maintenance parts are well protected and easy to access for maintenance.
Technical Parameters
| Dimensions and weight | |
| length | 13000mm |
| width | 2200mm |
| height | 2400/3100mm |
| weight | About 22000kg |
| Driving speed, horizontal | 10km/h |
| Maximum climbing ability | 14° |
| Security | |
| Noise level | <100dB(A) |
| Liftable safety ceiling | Meet the requirements of anti-rolling and anti-rock falling |
| Drilling system | |
| Rock drill | 2×HC95LM |
| Impact power | 21KW |
| Impact flow | 100-120L/min |
| Shock pressure | 180-200bar |
| frequency | 54-62Hz |
| Torque | 764Nm |
| Aperture | Φ42-102mm |
| Advance beam flip | 360° |
| Propelling beam compensation stroke | 1600mm |
| Drill boom | |
| model | K40 |
| form | Automatic leveling |
| Boom telescopic | 1800mm |
| Electric hydraulic pump station | |
| Electric motor | 2×75kw three-phase motor |
| Impact - propulsion - drill boom | Axial variable piston pump |
| turn around | Gear pump |
| Filtration accuracy | 10μ |
| Hydraulic tank | 400L |
| Hydraulic cooler | Water cooler |
| Operating Voltage | 380V |
| frequency | 50Hz |
| Starting method | Star - triangle |
| Cable reel | 1×CRC1016 |
| Reel capacity | 100m |
| Feng Shui Road System | |
| Air compressor | 1×JN11 |
| Displacement | 1.55m 3 /min |
| pressure | 8bar |
| Shank tail lubrication device | Electronic pulse lubrication pump |
| Lubrication air consumption | 2×0.3m 3 /min |
| Lubrication oil consumption | 2×180-250g/h |
| Water pump | 1×CR10-22 |
| power | 7.5kw |
| Pump displacement | 10m 3 /h |
| Chassis | |
| diesel engine | Cummins QSB3.9-C125 93KW/2200rpm |
| Exhaust gas purification | Catalytic converter |
| Transmission system | Torque converter + gearbox |
| Walking brake | Wet brake in bridge |
| Parking brake | Mechanical brake |
| Fuel tank | 120L |
