With the rapid development of the construction industry, higher requirements have been put forward for the quality and production efficiency of pipe piles. In the pipe pile production process, the centrifuge is a key piece of equipment, and its operating performance directly affects core indicators such as the compactness and strength of pipe piles.
The successful application of frequency converter in pipe pile centrifuges can significantly improve the quality, efficiency and energy-saving level of pipe pile production, reduce equipment maintenance costs, and demonstrate the great application value and broad development prospects of frequency converter in the field of industrial production. In the future, with the continuous advancement of frequency converter technology, it will play an irreplaceable role in the pipe pile production process.
Pipe pile centrifuges have specific requirements in terms of speed regulation range, low-speed high-torque output, precise control, and reliability. The frequency converter needs to meet the centrifuge’s rotational speed requirements for centrifugal forming across five stages: from low speed (50 – 100 r/min), through medium-low, medium, medium-high, to high speed (800 – 1200 r/min). It should be able to output 180% of the rated torque at 0.5 Hz to ensure smooth startup of the centrifuge, strong load adaptability, and be equipped with multiple protection functions such as overcurrent, overvoltage, undervoltage, overheating, short circuit, and current imbalance. It must fully adapt to complex industrial environments with high temperatures, high vibrations, and high dust levels.
The normal operation of a pipe pile centrifuge is generally divided into 5 stages, namely the low-speed stage, low-medium speed stage, medium-speed stage, medium-high speed stage and high-speed stage. The details are as shown on the left.
The GTAKE centrifuge control scheme mainly consists of multiple GK900 frequency converter, three-phase asynchronous motors, a PLC controller, an HMI, and PROFINET bus communication, etc.
Its control schematic diagram is as follows:
GK900 is the book-type versatile series which can be used to replace GK620 and GK820 with more cost-effective price. Moreover, its performance is optimized and many new functions are added. It almost can be applied in all kinds of industries from the simple fan & pump to the most demanding ones.
