A remote switching and intelligent control device and control method for a local fan in a coal mine

Abstract

A remote switching and intelligent control device and control method for local fans in a coal mine, which is composed of a ground monitoring center, an industrial Ethernet communication system, a frequency conversion monitoring system for local fans, and an environment monitoring system for driving face; the ground monitoring center consists of a central station and a server The industrial Ethernet communication system is composed of optical fiber network, Ethernet module and switch; the fan frequency conversion monitoring system is composed of fan working condition monitoring sensors, monitoring substations and frequency conversion control components; the tunneling face environment monitoring system is composed of ventilation parameter monitoring sensors, Composition of monitoring substations. The system realizes unattended local ventilation through remote continuous inching switching of local fans; through the monitoring data of the tunneling face, it analyzes and predicts the air volume required, and establishes the best matching model of air volume supply and demand for the tunneling face, according to the characteristic curve of the local ventilator Library, real-time search for the required operating frequency, intelligent control, and remote visualization of local ventilation and energy-saving safety.

Description

technical field [0001] The invention belongs to the field of air volume control of a coal mine ventilation system, and in particular relates to a remote switching and intelligent control device and a control method for a local fan in a coal mine. Background technique [0002] Mine ventilation system is one of the most important systems for coal mine safety production. It can not only deliver oxygen continuously for underground workers, but also is the most effective means to dilute and discharge toxic and harmful gases underground. A reasonable mine ventilation system is the key to the safety and health of underground workers. Important guarantee for labor and disaster prevention and resilience. The environment under the coal mine is changing all the time, so the air supply system is required to change dynamically. Local ventilation locations are dual fans, dual power supplies, and safety protection measures for wind power lock and gas power lock. However, at present, mines...

AI Technical Summary

Problems solved by technology

[0003] Mine at home and abroad generally use manual methods to collect local ventilation parameters, and the workload is very huge

This not only wastes a lot of human and financial resources, but also makes it difficult to accurately obtain local ventilation parameters, and it is also difficult for staff to discover existing safety hazards in time, thus increasing the probability of safety hazards turning to accidents

At present, the tunneling working face is still supplied with wind through the "one wind blowing" method, which not only wastes a lot of power resources, but also has many potential safety hazards. With the development of modern technology, the coal mine monitoring and monitoring system and computer technology , PLC control technology, intelligent air volume control technology, optimal selection algorithm of the adjustment branch, intelligent software development and other fields of knowledge organically combined together, according to the changes in the required air volume under different conditions, the frequency conversion and wind resistance adjustment methods of local fans are analyzed. Establish an appropriate theoretical model of air volume adjustment, study the stability and reliability inspection methods of the ventilation system during the adjustment process, realize the advanced research and judgment of the required air volume, and ensure the stability of the air volume adjustment during the production process

In order to meet the needs of the economic development of the coal market and reduce the occurrence of major accidents in my country's coal mines, the construction of high-yield, efficient and intensive mines is an inevitable trend in my country's coal development. Safe and green mining of mines is our goal. The ventilation system of coal mines is abnormal. The theory and technology of intelligent control has become the key direction of research to improve the disaster prevention and mitigation capabilities of the ventilation system. The current frequency converter adjustment is a phased adjustment, and it is not connected with the intelligent air volume adjustment; the current local wind resistance adjustment is mostly manual adjustment. And it is only the mechanical automatic adjustment of local air volume, and does not form the intelligent system adjustment of the whole air network system

Images