Crawler
draglines
Electric
shovels
Rotary Drilling Rig SBSh-270 IZ
The Rotary Drilling Rig SBSh-270 IZ is designed to
produce blast holes in rocks of any hardness when
mining mineral resources in open pits. The Drilling Rig is equipped with
spacious cabin providing operator with good field of vision and meeting all
safety regulations in terms of external factors like noise, vibrations,
dustiness, lighting and temperature. The basic process parameters of drilling
are displayed on colour linear scales and digital indicator (drilling depth,
rotational speed of the drill string, feed force, load on rotation head and
drilling speed). Propel mechanism is blocked when the drill rod is descended
down the hole.
The drill machinery (drill string rotator, feed and propel) is driven by DC
motors fed from thyristor converters. Control system provides for high factory
operational readiness and is equipped with diagnosis enabling to replace
cubicles and units without corrective adjustment of the system. Excavator-type
low-pressure
caterpillar
track with separate driving of each track has shown good performance on low
quality bottoms of ore quarries. The drill mast is made of square-section pipes
and its open-type design provides for free access to the part of equipment
positioned on the mast. The Drill is equipped with the screw compressor capacity
40м3/min, having two oil-separation stages, finned steel pipe oil-cooler and
cast frame. The Drill Rig is supplied with electrical equipment rated for 6000 V,
current frequency 50 cycles and wet dust suppression system. Upon customer’s
request the Drill can be additionally completed with cable drum, dry dust
suppression system instead of the wet one, welding transformer, portable heater
30 KW, lubrication system and heavy type rods.
| OPERATING PARAMETERS | GENERAL DIMENSIONS | |||
| Drill type |
SBSh-270 |
Distance between jacks, m | 7,35 | |
| hardness of drilled rocks |
Up to f =12 |
Drill width, m | 6,09 | |
| Diameter of hole, mm |
270; 311 |
Distance between jacks after width, m | 3,66 | |
| Feeding force, KN |
450 |
Distance from ground to jack heel, m | 0,45 | |
| Depth of drilling, m |
18-32 |
Height of Drill with upraised mast, m | 19,45 | |
| Rod length, m |
19 |
Height of Drill with lowered mast, m | 6,13 | |
| Number of rods, pcs |
1-2 |
Length of Drill with lowered mast, m | 19,03 | |
| Declined drilling, degrees |
Up to 30° |
Length of Drill with upraised mast, m | 1 | |
ADDITIONAL EQUIPMENT. OPTIONS ARE SPECIFIED AT
ORDERING:
Cable drum
Welding transformer
Wet dust suppression (instead of the dry one)
Portable heater
“Atlas Kopco” (Sweden) compressor
Lubrication system
Rotator drive with the increased rotational speed
| SUPPLY VOLTAGE | |
| Supply voltage | 3-phase, 50 cycles, 6000 V |
| Supply transformer | 2 х 160 kVA |
| HIGH-VOLTAGE EQUIPMENT | |
| Metal-clad switchgear with vacuum breaker | Compressor motor power supply, drill electrical equipment power supply |
| ELECTRICAL EQUIPMENT CONTROLS | |
|
Low-voltage apparatus for control of the Drill electric drives with the built-in fault indication system. Units, factory adjusted cubicles, their replacement without corrective adjustment of system. |
Power thyristor converters of main drives
(rotator, feed, propel)
Relay and contactor control of hydraulic system and auxiliary drives; Interlock against the Drill movement with rod in hole. Automatic levelling. |
| ELECTRICAL PROTECTION | |
| Compressor motor | Protection against thermal overloads and short circuit |
| High-voltage transformer | Current-limiting fuses |
| Basic and auxiliary motors | Protection against thermal overloads and short circuit |
| LIGHTING | |
| Working area | Floodlights with quartz halogen lamps |
| AUXILIARY MOTORS | |
| Hydraulic system motors | 22; 11;3 kW |
| Compressor oil coolers | 7,5 kW |
| Oil pump | 1,5 kW |
| Compressor room supercharging | 1,1 rpm |
| Cable drum drive | 3,7 kW |
| Cabin fan | 1,1 kW |
| Feeding motor fan | 2 х 3 kW |
| DRY DUST SUPPRESSION: | |
| Fan motor | 7,5 kW |
| Vibrator motor | 0,6 kW |
| WET DUST SUPPRESSION: | |
| Water pump motor | 11 kW |
| Dust flue fan motor | 7,5 kW |
| COMPRESSOR ASYNCHRONOUS MOTOR | 250 kW, n = 3000 rpm. |
| OPERATOR’S CABIN | |
| Design | Thermal and sound insulation with vibration isolated floor. |
|
Glass
Controls |
Equipped with air-conditioner and
pressurisation of filtered air.
With linear scales of operating and emergency ranges; depth of drilling; feed force; rotational speed; sinking speed; rotator load |
| MAST | |
| Design | Grid-type, square pipes, open-type design |
| Interlocking | With hydraulic fixing devices |
| For declined drilling stretching can be up to 30° | Equipped with mechanical fixing devices |
| DUST SUPPRESSION | |
| Wet type with water-air mixture | Water tank with electric heater, capacity 4,4 m3, pump |
| Dust flue interlocking with propel mechanism. | |
| Dry-type | Dust precipitator with bag filters. |
| OPERATING MECHANISM DRIVES | |
| CROWD, HOIST | |
| Axial feed force | 450 KN |
| Axial force of drill bit hoisting (speed hoisting) | 180 KN |
| Feed speed in operating mode | 0ч6 m/min. |
| Speed of hoisting-lowering of drill string, max. | 16 m/min. |
| DC motor | 2 х40 kW, 220V |
| Brake | Electric and hydraulic TKTG-300 |
| Electronic depth indicator | |
| ROTATION MECHANISM | |
| Drill bit rotational speed | 0ч120 rpm. |
|
Torque: nominal
maximum |
8,4 kNм
13,0 kNм |
| DC motor with built-in fan | 105 kW, 440 V |
| PROPEL MECHANISM | |
| Travel speed | 1,47 km/hr |
| Surmounted grade | 12° |
| DC motor | 2 х 65 kW, 350 V |
| Brake | Electric and hydraulic TKTG-300 |
| Cable drum | Capacity is not less than 630 |
| COMPRESSOR | |
| MODEL | 1VV-40/6 |
| Manufacturer | 38 m3/min. |
| Pressure | 5 kg/cm2 |
|
Oil cooler
Oil separation * |
Made of finned bimetallic pipes. Two-stage
type.
Oil entrainment does not exceed 60 g/hr. |
| * Other types of compressors are available for which, please, refer to the Company. | |
| DRILL WEIGHT | |
| Working weight * | 136 t |
| * Weight can vary within 5% depending also on the option of auxiliary equipment | |
| BOGIE DIMENSIONS AND SOIL PRESSURE | |
| Bogie length | 6340 mm |
| Bogie width | 5344 mm |
| Track b=900 mm | Unit pressure 1,49 kg/cm2 |
| HYDRAULICS | |
|
Pumps: pressure 160 kg/cm2
Pressure 40 kg/cm2 |
63l/min и 35 l/min
28,8 l/min |
| Jacks: for levelling 4 pcs. | Дц = 220 mm |
| piston stroke | 1400 mm |
| for mast hoisting 2 pcs. | Дц = 250 mm |
| piston stroke | 2000 mm |
| Control |
Electric and hydraulic control by means of controller |
| RELIABILITY INDICES | |
| Average service life with one major overhaul | Not less than 8 years |
| Mean life till the first major overhaul | 29200 hrs |
Design features, specified materials, performance of
main drives and compressor make the Drill SBSh-270IZ to be the most reliable and
efficient Drill Rig for operation under most severe conditions.
The Drill Rig is ordered according to TU 05764417-065-98.