Underground Feeder Breakers

/Underground Feeder Breakers
Underground Feeder Breakers2017-06-21T19:19:46+00:00

youzignThe Cogar Feeder Breaker is a heavy duty machine designed to receive mined material from a haulage vehicle, crush that material to a nominal size and discharge onto a belt conveyor for conveyance to the outside without damage to the belt. This is done in an efficient manner that allows the haulage machine to discharge rapidly and return for another load. The material is crushed to a product size (normally 6”-) that allows movement along the belt and through transfer points without damage to the belt. Further the machine is similar to the belt and should be available for duty nearly 100% of the time; therefore, the unit is of a robust and dependable design.

We invite you to “Experience the Cogar Difference” and look forward to serving your equipment needs. The normal machine functions involve moving or tramming the machine as it must advance as the normal mining cycle advances, conveying or moving the material through the machine and crushing the product.

Tramming

The feeder moves on a cat or crawler system that is powered by hydraulics. The hydraulic pump is powered by the electric motor that also drives the crusher. The pump is a piston design that provides up to 40 gpm per side for tramming.nTram speeds are 50 fpm or less. The tram valves are so indicated on the machine.There is a left tram and a right tram valve. If pushed in or forward the crawler will move forward. If pulled back or reverse the crawler will reverse. The two sides act independently, thus steering is accomplished by splitting the crawlers of moving one valve at a time. CAUTION must be used at times when moving the machine. The machine is wide and there exists the risk of an operator being trapped against the rib of the mine.There should be no one on sides when moving other than the operator. The cats have hydraulic cylinders on each end that will move ends of the machine up and down to allow the machine to tram through undulations in the mine. Ground clearance varies as these jacks are activated to raise and lower the machine. The front or hopper jacks work from one valve section where movement of the handle raises or lowers the front or receiving end of the feeder. The discharge end of the machine has separate valve sections to raise and lower each side of the machine independently. Again movement of the handle raises or lowers that side of the machine. When actually moving or tramming the machine, one first must start the electric motor, then the operator after insuring clearance around the machine must push the blue “tram enable” switch which powers the valves and allows movement. The valves are self-centering and will come back to a neutral position if released. Should there be any concern, the operator can hit the electric “tape switch” or panic switch to turn off all power.

ALWAYS USE CAUTION WHEN MOVING THE MACHINE. THE FEEDER IS NOT DESIGNED TO MOVE QUICKLY SO USE PATIENCE AND THINK SAFETY

Conveyor Operation

Once the machine is set up for operation, (normally receiving end on ground with discharge up and over belt tail piece) the unit is ready to convey material. The conveyor is a heavy duty chain conveyor consisting of two strands of heavy duty chain with solid steel flight bars that actually convey or drag the material under the crusher and to the discharge end of machine where the material is dumped onto the belt. The conveyor is driven by a hydraulic direct drive motor attached to head shaft with splined fit. The hydraulic pump powers the conveyor. In normal operation the conveyor is started by the haulage vehicle operator by pushing a START switch suspended from the roof or by shining his light onto a photo cell that automatically starts the conveyor. The conveyor will then run through an adjustable time cycle and automatically shut down after material has run through the machine. If another haulage unit comes up before the completed cycle, he can hit the button or shine his cap lamp on the photo cell and start his discharge. The chain will start and stop but the crusher runs continuously. The Cogar conveyor is equipped with the ability to run at adjustable speeds. By varying the flow from the hydraulic pump to the hydraulic conveyor motor, speed is varied. Normally speaking, the slower the conveyor speed the better as it increases chain life and doesn’t crowd the crusher. Trial and error leads to the best speed setting. The conveyor speed must accomplish production goals first and the Cogar feeder is designed to meet or exceed requested tonnages. Increased throughput comes through increased conveyor speed, different crusher design or wider conveyors.

Crusher Operation

The crusher is powered by a 200hp electric motor and is a mechanical driven unit.The crusher is designed to deliver breaking force through carbide tipped bits to break or crush the raw mined product to a normal 6” or less size which has been found to normally pass through belt transfer points and allow transit of material via belts without spillage or belt damage.When the feeder is started, the crusher rotates so EXTREME CAUTION must be exercised to avoid contact with the rotating crusher.The crusher is equipped with a switch that monitors rotation and should tramp iron or other material lock up the crusher rotation, the power to the motor is stopped.The crusher is driven through a right angle bevel gear speed reducer and a set of sprockets with chain drive to rotate the crusher at the optimum speed to crush your product.There is a mechanical clutch or torque limiter between the motor and reducer to also provide protection.

KEY BENEFITS

  • Fully customized to fit your production needs.
  • Heavy Duty Conveyor decking with CCO throughout.
  • Skid Mounted for easy relocation.
  • Portable or machine mounted Power Stations.
  • Chain and Flights made from Alloy Steel (Variable Arrangements).
  • Variable Frequency Drive and Direct Drive Options.
  • Manual and Hydraulically operated flow gates.
  • Available with Breaker for Sizing
  • Optional Folding Hopper Walls