SBSH-250D DRILLING RIG

The rotary blasthole drilling rig SBSH-250D is specified for drilling blast holes with diameter 200-270 mm in hard highly abrasive rocks. The diesel drive provides autonomy which meaningfully decreases time and expenses for moving the drilling rig not depending on remounting the network of the quarry.

The installed diesel engine Cummings QSK19 with power 650 H.P. is notable for low  fuel consumption and reliability. The serial location of the compressor, engine and pump unit makes easier their technical maintenance. The fuel tank with capacity 2,5 m3 provides day round work of the drilling rig. All the operations of the drilling rig: moving, leveling, lifting and lowering of the mast, feeding and rotation of the drilling tool, build-up of the drilling unit are provided by the hydraulic drive.

The hydraulic drive, manufactured on the basis of mobile hydraulics of "Bosch Rexroth" provides high reliability of the work of the drilling rig, softness of switching the operations, lack of stresses, meaningful lowering of noise and vibration, precision of regulating the operations as the capability of the regulated pumps is defined automatically according to the feedback connection depending on the speed of the executed operation. The rate of penetration remains constant independent from the bit load at empty spaces and Assuring in the drilled rocks.

 The hydraulic drive has the idling which keeps the temperature conditions of the hydraulic system in the state of constant readiness which is very effective in winter time. While all hydraulic operations are switched off, the pumps support the minimum working volume and pump 10-15 litres of working oil through the blocks of the hydraulic system.

The drilling rig is equipped with the compressor with productivity 28 m3/min or 40 m3/min which depends on the diameter of drilling. The rational assembling of the main units of the drilling rig provides stability while moving and drilling.

The mast frame is of closed type with intermediate blocks, strengthened girder of shoring the mast turning cylinders provide firmness and reliability at feed force 35 tons and torque 1300 kgm.

The rope and polyspast drive of feeding the drill tool from two hydraulic cylinders allows to reduce stress and vibration while drilling rocks with cracks. The bearing unit and the rotor are executed separately which also prevents the rotor from stress and vibration. The cabin of bigger size with heated windows and warmed walls, floor and ceiling with air heater and conditioner. The vibroprotective chair, steering board, industrial computer with all the drilling parameters data on its screen with constant diagnostics of the drilling rig units.