• Introduction:
    The belt conveyor is a kind of traction continuous transportation equipment. It is widely used in coal, metallurgy, mining, port, building materials, chemical industry, light industry, petroleum, and transportation industries. It can be used to transport block, granular and Bulk material items. Among them, the belt conveyor with large dip angle is suitable for the transportation of underground coal mines, roadway tunneling, downhill transportation, main inclined shaft lifting, open pit mine and ground transportation system. It is an ideal supporting equipment for coal mining mechanization, working environment. -10 ° C ~ +40 ° C.

     

    The principle of power generation:

    The lower belt conveyor is to transport the material from high to low. At this time, the conveyor only needs to overcome the friction, so the load is very light. If the component of gravity of the conveying material in the running direction is greater than the frictional force of the belt machine itself, the rotor of the motor will be passively accelerated under the drag of the material. When the motor speed exceeds its own synchronous speed, the motor will feedback the power and The braking force is generated to limit the speed of the motor to continue to rise, that is, the potential energy of the material falling is converted into electric energy by the motor. Therefore, the electrical energy emitted from the material being transported can be re-categorized into the grid through a series of means.

     

    Technical Difficulties:
    The lower belt conveyor is a special belt conveyor that transports materials from high to low. This belt conveyor has negative power during transportation of materials, and the motor is in the state of power generation braking. Effectively control the belt conveyor full load start, stop, especially in the case of sudden power loss, realize the controllable soft brake of the belt conveyor, and prevent the belt conveyor from being the key technology of the belt conveyor.

     

    Solution:
    1. Power generation operation mode, the conveyor runs in the “zero power loss” state, and the excess power can also be used by other equipment.
    2, signal safety acquisition design, through the signal acquisition logic design, so that the system can not lose the logic design of the entire system after the cable is interrupted.
    3, the protection device design, through a simple electrical switch to build a test network for the entire downstream conveyor belt machine monitoring.
    4. The logic control of the emergency brake lock system ensures the safety and reliability of the transport feeder under the high dip angle.
    5, long-distance signal stable acquisition anti-interference circuit design, reliable, fidelity transmission long-distance acquisition signal.

     

     

    Technical Data of Downward Belt conveyor:

    Belt Width

    (mm)

    Repose

    Angle

    Belt speed(m/s)

    2.0

    2.5

    3.15

    4.0

    5.0

    6.3

    Carrying Capacity(t/h)

    800

    10°-20°

    380-550

    480-680

    600-850

    ---

    ---

    ---

    1000

    630-880

    790-1110

    1000-1400

    1200-1700

    ---

    ---

    1200

    900-1300

    1150-1600

    1450-2050

    1850-2600

    2300-3200

    ---

    1400

    1250-1800

    1580-2250

    2000-2800

    2550-3600

    2190-4500

    ---

    1600

    1700-2350

    2100-2950

    2650-3850

    3400-4750

    4250-5950

    ---

    1800

    2150-3050

    2700-3800

    3440-4840

    4350-6100

    5450-7650

    6800-9600

    2000

    ---

     

    4380-6050

    5480-7680

    6850-9600

    8700-12000

    2200

    ---

     

    5300-7300

    6700-9300

    8400-11700

    10600-14600

    2400

    ---

     

    6300-8600

    7900-11000

    9900-13800

    12600-17200

    Note:The carrying capacity in the table is calculated on the basis of 1t/m³ volumetric weight, horizontal conveyance, and idler troughing angle at 30°.

     

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