Ground Trench Sliding Contact Line Manufacturer
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Rail Flat Car
Electric Rail Flat Car: It is an electric rail transport vehicle for in-plant use, solving the product transportation between spans within the factory. Also known as rail flat car, cross-span flat car, trolley, electric flat car. It has the advantages of simple structure, easy use, easy maintenance, large load capacity, and low pollution. Widely used in machine manufacturing and metallurgical plants, as a means to cooperate with cranes for transporting heavy objects across spans within workshops. The KP series electric flat cars have low height, reinforced deck, easy modification, and convenient maintenance. They can be divided into KPC, KPJ, KPT, KPD, KPX, KPDX series.
The KPC series electric flat car is a safety sliding contact line powered electric flat car. A trench is dug beside the track, safety sliding contact lines are installed inside the trench, and the trench is covered with cover plates hinged on one side to the ground. When the flat car runs, the trench flap device installed on the car lifts the cover plates, and the flap device contains cables connected to the current collector of the safety sliding contact lines. After the flat car passes, the cover plates automatically return to the ground. It ensures smooth passage for trackless vehicles. The trench flap sliding contact line type electric flat car is not limited by running distance.
The KPJ series is a cable reel powered electric flat car, powered by AC 380V from a cable reel. The cable reel is of hysteresis coupling type, ensuring uniform cable tension and preventing damage. AC 380V supplies power to the YZ metallurgical motor on the flat car, which drives the car. When the car runs, the cable reel automatically winds or unwinds the cable. Affected by the power supply length of the reel, the maximum running distance is generally less than 200m.
The KPT series electric flat car is a towed cable powered electric flat car. One end of the cable is connected to the ground power supply, and through cable trolleys and traction steel wire rope, it is led into the control box, then supplies power to the YZ motor on the flat car to drive it. However, the running distance cannot be too long, generally not exceeding 50m, as longer distances may easily tangle the cable.
The KPD series is a 36V single-phase (three-phase) low-voltage track powered electric flat car,
powered by track sliding contact lines. The ground step-down transformer control cabinet steps down single-phase (three-phase) AC 380V to single-phase (three-phase) 36V, which is fed to the flat car via track sliding contact lines, and then stepped up by the onboard step-up transformer to single-phase (three-phase) AC 380V. It provides power to the single-phase capacitor motor (or YZ metallurgical motor for three-phase). Since no cable is used, it is safe, reliable, not afraid of heat or impact, does not hinder cross traffic, and is easy to achieve remote control and automation, greatly facilitating plant layout. However, the track construction requirements are high, track insulation must be ensured, and copper bar compensation lines should be added for longer distances. For longer running distances, the number of step-down transformers must be increased.
Since the starting current of KPD flat cars flowing through the track is very large (up to 1000A), there is a significant voltage drop at the end of the track, causing difficulty in starting the single-phase capacitor motor. Therefore, the maximum load capacity of single-phase KPD flat cars is 50 tons. For loads above 50 tons, three-phase 36V low-voltage track power supply is used with YZ metallurgical motors.
The KPDZ product inherits the advantages of KPD flat cars while avoiding the disadvantages of difficult starting and short running distance of the original model. KPDZ flat cars use onboard rectification devices to rectify single-phase (or three-phase) AC 36V from the track into DC 36V, driving DC traction motors to run the car. Compared with AC motors, DC motors have advantages such as not being easily burned, high starting torque, and strong overload capacity. Even under undervoltage conditions due to track insulation aging, they can still work reliably.
The KPX series is a battery-powered electric flat car, powered by batteries. The battery supplies power to the DC traction motor, which drives the car. Compared with AC motors, DC motors have advantages such as not being easily burned, high starting torque, and strong overload capacity. The running distance is not limited. It has greater safety, maneuverability, and flexibility than KPJ and KPD series flat cars, with no limit on running distance and no insulation requirements for the track, making construction convenient and low-cost.
Note: The above information and technical parameters are compiled and published by Yangzhou Dary Electric Co., Ltd.
