Operation control method of high-voltage variable-frequency main coal flow intelligent conveying system

Abstract

The invention discloses an operation control method of a high-voltage variable-frequency main coal flow intelligent conveying system. The high-voltage variable-frequency main coal flow intelligent conveying system comprises a torque detection system, a control system and a high-voltage variable-frequency transmission system, wherein the high-voltage variable-frequency transmission system comprisesa conveying belt driven by a plurality of variable-frequency motors; the torque detection system sends a torque sampling signal of the variable-frequency motors to the control system, the control system converts the torque sampling signal into torque data and estimates the coal amount loaded by the conveying belt at present according to the torque data, the high-voltage variable-frequency transmission system is controlled according to the torque data and / or the estimated coal amount, and the operation speed of the conveying belt is adjusted. According to the invention, the coal flow conveyingspeed is adjusted sensitively, the failure rate is low, the energy-saving effect of the system is good, and the operation cost of equipment is reduced.

Description

[technical field] [0001] The invention relates to a high-voltage frequency-variable main coal flow intelligent conveying system, in particular to an operation control method for a high-voltage frequency-variable main coal flow intelligent conveying system. [Background technique] [0002] Mine-used high-voltage inverters are widely used in coal mine underground transportation equipment. It is an electrical product with high efficiency, energy saving and environmental protection, and plays a very important role in the coal industry. The existing conveying equipment in underground coal mines is basically high-power equipment, which consumes a huge amount of electricity. Therefore, energy saving and consumption reduction have been a topic of great concern for many years. [0003] The invention with the patent number CN201310503153.3 discloses an underground scraper conveyor in a coal mine and a chain-breaking prevention control method. The head and tail of the scraper conveyor ...

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, the conveying equipment in the coal mine is generally driven by two motors or more than two motors to drive the same section of belt (chain belt) for coal mine conveyance, which has very strict requirements on the control performance of the whole system, and some equipment uses coal flow detection To control the adjustment of the conveying speed of the coal flow, but because the amount of coal at each position on the entire belt is inconsistent, the reaction of the conveying speed adjustment is not fast enough. The speed is too slow for a long time when it should be fast, or the speed is too fast for a long time when it should be slow. Even if it is only adjusted manually, it is often in a state of no adjustment for a long time, and the conveying speed cannot meet the requirements; so the adjustment of the conveying speed of the coal flow in this kind of conveying system has become a major technical problem

Due to the harsh environment of underground use, the service life of equipment whose conveying speed cannot be adjusted to meet the requirements will be severely shortened in long-term use, and the cost of equipment downtime for maintenance or equipment loss remains high.

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