FGI High voltage Explosion-proof Frequency Inverter in coal mine drainage pump application
1.Introduction
Mine drainage pump is a kind of pump used to remove stagnant water at the bottom of the mine, which is able to discharge the underground water into the pool above, the reverse seepage wall well or to the wellhead. Mine drainage pump is composed of electric motor, delivery pipe, pump body and accessories.
The process principle of mine drainage pump is to introduce water into the center of the pump impeller through the inlet pipe. Due to the rotation of the pump wheel and centrifugal force, the water will be compressed and forced into the drainage pipe. After the water is pumped into the pipe, it is sent out of the mine through the drainage pipe. Mine drainage pumps are able to discharge water out of the mine very efficiently and provide important support for mine production.
2.Application problems of underground drainage pumps in coal mines
(1) Drainage pump in the motor full-voltage direct start, due to the starting torque of the motor to be absorbed from the grid 7 times the rated current of the motor, and a large start-up current is a waste of power, the voltage fluctuation of the grid is also very damaging, increasing the line loss.
(2) Excessive starting torque generates mechanical shock, causing large impact force on the equipment, resulting in abnormal wear and impact of mechanical transmission components, shortening the life and thus increasing the maintenance workload.
(3) Hard starting of motors causes serious shocks to the power grid, and can also require too much power grid capacity.
(4) If the diesel emergency power supply is activated, it is not possible to meet the direct frequency start of the drainage pumps.
3.FGI High Voltage Explosion Proof Inverter Solutions
FGI high-voltage explosion-proof frequency inverter integrates mobile transformer station and frequency inverter in one, covers an area of small, phase-shifting transformer adopts the structure of delayed triangle, so that the input voltage of the unit is phase-shifted, which reduces the harmonic non-pollution to the power grid, perfect control system with DSP as the core, adopts unit cascade and carrier phase-shifting technology, and adopts high-speed fiber optic communication to realize the output of low harmonics, and it can realize the 5000 meters long distance. Drive underground scraper, transfer machine, belt machine, pumping pump and other equipment.
4.High-voltage explosion-proof frequency inverter product features
(1) The product structure design breaks through the technical boundary, and the volume advantage is obvious.
(2) Power unit cascade and carrier phase shift technology, perfect harmonic free, realize long distance drive.
(3) Integration of multiple control technologies, asynchronous motor, synchronous motor drive and control freely.
(4) Collected monitoring, warning, positioning and other functions, more comprehensive protection.
(5) With unit bypass, insulation detection and other functions, safe operation is more reliable.
5.Performance
Coal mine safety power supply belongs to both the coal mine production safety requirements, only coal mine power supply safety, other safety measures can better ensure the safety of other aspects. Special emergency power supply conditions, it is necessary to ensure that the coal mine power supply with reliability, safety, power supply reliability is the requirement of uninterrupted power supply, due to emergency power supply under the state of diesel generators can not meet the large-scale first-class load start problem, through the FGI high-voltage explosion-proof frequency converter to solve the problem of emergency motor start, the FGI high-voltage frequency converter in the coal mine underground drainage pumps to soft-start conversion, a very good application of the validation and solution! The above problems, the same coal mine intelligent construction can not be separated from the participation of high-voltage frequency converter, through the frequency inverter energy saving and emission reduction and thus help carbon peak, carbon neutral, I believe that high-voltage explosion-proof frequency converter is bound to have greater development and application.
