LEGRAengineering Pty Ltd
This unit is designed to have the main frame / power pack situated adjacent to the highwall edge, with the wet-end lowered over the pit wall and into the water accumulation on the pit floor. The advantages of this pump format over conventional pit type pumps are:
Quick mobilization and demobilization with minimum labour requirements
The pump delivery hose is positioned in place with the wet-end
The bulk of the pump unit remains clear of mining operations
Eliminates the need for Pump Crew to work in the pit near the Highwall
Access to water accumulating in a pit being developed by dragline operation is achieved without hindering the operations
Able to operate and be serviced in all weather conditions
By incorporating a second (booster) pump unit to the Highwall Pump, performance is improved to 100L/sec @ 200m head TDH. The booster pump is hard plumbed into the outlet of the primary pump, allowing for simple and efficient transferring of water at high head.
By utilizing a single pump unit to lift to 200m, operating of a single engine, all complexities of setting up staging pumps, including manoeuvring of a second unit, connecting pipe work, balancing performance, and monitoring both units is eliminated.
| Pump | Cast Iron Volute. 28% Chrome Impeller and Suction Plate. |
| Suction | Fabricated screened suction – Galvanized. No footvalve fitted. |
| Drive | 160cc fixed displacement axial piston motor. |
| Speed | Max 2200 R/M. |
| Arrangement | Motor drives pump shaft through a coupling supported by tapered roller bearings in a sealed housing. Bearings are lubricated by case oil. Mechanical seal prevents leakage. |
| Pump Performance | 100 L/s @ 100m head unworn pump, clean water @ 2150rpm pump speed. |
| Pump Curve | Impeller clearance is adjusted by bolt/lock nut adjustment. |
| Pump | Cast Iron Volute. 28% Chrome Impeller and Suction Plate. |
| Suction | 8” drop pipe from reel. |
| Drive | 160cc fixed displacement axial piston motor. |
| Speed | Max 2200 R/M. |
| Arrangement | Motor drives pump shaft through a coupling supported by tapered roller bearings in a sealed housing. Bearings are lubricated by case oil. Mechanical seal prevents leakage. |
| Pump Performance | 100 L/s @ 100m head unworn pump, clean water @ 2150rpm pump speed. |
| Pump Curve | Impeller clearance is adjusted by bolt/lock nut adjustment. |
| Wheels | 2 x 750 x 16” wheels fitted to 1550mm x 40mm axle are mounted across the wet-end, and assist in positioning the wet-end during lifting or lowering. |
| Support bracket | Hydraulically (ram) operated, acts as support for the wet-end during travelling, and hose positioning during lowering. |
| Length / Type | 125m of 200f Poly standard supply. |
| Hydraulic Hoses | 1-1½" High pressure - Multi Spiral - pressure hose to motor drive. 1-1½" Medium pressure - Double Braid - hose return line. |
| Size | 2900f drum. 3700f rim.. Capacity to 125m of 200f Poly. |
| Construction | R.H.S spokes each side welded to hub flange and rim. 5mm M.S. plate drum. |
| Reel Method of Support | Hydraulic Gland and Water Discharge Gland |
| Water Discharge | 200NB Table E flange 300mm from ground level. 40NB Ball valve fitted. |
| Heavy skid base - fully weld fabricated unit construction comprised of UB side runners (with wear plate). Heavy R.H.S. cross members, supporting the R.H.S. reel mounting frame. Heavy front tube with push pads, engine mounting, engine canopy, front bars for engine protection, fuel tank mountings, oil reservoir mountings, safety mesh mountings, and tow chain. | |
| Dimension | Overall – 13500mm x 2850mm x 4059mm Ground contact 6700mm x 2830mm. Mainframe 7300mm x 2700mm. |
| Dry Weight | 14 tonne |
| Skid Runners | 360UB56. Fitted with 20mm Bisalloy 500 Wear Plate. |
| Jib Extension Beams | 75x75x3 R.H.S & 127 x 75 x 3 R.H.S. |
| Extension Bracing | 65x65x3 R.H.S and 50x50x3 S.H. |
| Push Pads | 250x150x9 R.H.S capped w/-20 ms plate. |
| Engine Mounting | 150x100x12 Angle Iron. |
| Engine Canopy | Formed 3mm flat mild steel. |
| Engine Protection | 200.N.B. sched 40 pipe mounted on 360 U.B. uprights. |
| Towing Chains | 2 of 3.4m long of 20mm Hercalloy with 260x140x38 tow-ring link at front. |
| Hydraulic Pump | 2 of Rexroth A11VLO190 pressure compensated flow control piston pumps. In Tandem. Coupled to engine flywheel. |
| Operating Speed | 1800 R/M. |
| Flow at Duty | 340 L/m. per pump |
| Max Pressure Rating | 4060 P.S.I. (280 bar) |
| Operating Pressure | 3625 P.S.I. (250 bar) |
| Auxiliary Control Valve | 4 Bank load sense on reel, slew, and tilt and pump support. |
| Reel Drive | Hydraulic motor driving via a 30:1 reduction box & 5:1 x 2” chain reduction. |
| Load Check Valve | Double acting overcentre valves and hydraulic brake coupled to the reel motor. |
| High Pressure Hose System | 1½"f. multi spiral high pressure. |
| Return Line | 1½"f double braid low pressure. |
| Hoses-Auxiliary System | ½" or 5/8"f double braid medium pressure. |
| Reservoir | 800Lts mild steel fabricated, fitted with oil outlet, oil return. |
| Auxiliary Hyd Reservoir | 100Lts Auxiliary tank fitted to main frame, pumped into main reservoir via the hydraulic filters, and incorporating a 12v transfer pump. |
| Return Line Filter | 2 of 1½" dual element cartridge type. 3 Micron Nominal Filtration |
| Oil | Mineral Oil of ISO viscosity grade 22. |
| Engine | Cat (C15) or Cummins (QSX15). Turbo charged, after cooled 6 cylinders. Other options available on request |
| Engine Management | Programmable Logic Control (PLC) controls and monitors all shut-down functions. Protection on engine oil pressure, radiator level, engine temperature, high and low levels of hydraulic oil, high and low hydraulic pressure, high and low water pressure at Booster Pump Suction, and hydraulic filter pressure. First out indicator identifies source of engine shutdown PLC operates speed of Booster Pump to maintain synch with Primary Pump. |
| Fuel Cell | 2200Lts capacity with Wiggins fittings. |
| All frame work blasted to A.S. class 2½, primed and painted Interfine 629 White. |
| Engine at 800RPM to 1000 RPM | Auxiliary control valve functions. 4 functions - Wet-end lift/ lower Roller Plate Slew for aligning the hose to reel during reclaim Roller Plate traverse for assisting hose and wet-end entry to pit Wet-End Support Bracket supports wet-end and guides hose on initial wall contact |
| Engine up to 1800 RPM | Operation of pump functions. Booster Pump speed is controlled with PLC. PLC maintains speed of booster pump to ensure a set pressure is maintained at booster pump suction. |
The foregoing specification is correct at time of publication however, LEGRA reserve the right to amend the specification as required in keeping with market development.
Highwall Pumps