Coal mine ground centralized control technical scheme?

Coal mine ground production system is an important link in coal mine production, and its centralized control is very important and needs to be safe and reliable. * * Coal mine ground production equipment is less, and the process is relatively simple. Therefore, we have designed a centralized control system for ground production based on the principles of science, efficiency, safety and economy. Through the centralized control system, it is convenient to monitor all aspects of the whole ground production in real time, remotely control the start and stop of equipment, monitor various parameters such as current and weighing, and meet the needs of modern mines in pursuing advanced technology, safe production and strengthening production management.

production process

The ground production system equipment mainly includes seven main production equipment, such as 10 1 coarse coal belt conveyor, 102 coarse coal belt conveyor, circular vibrating screen, gangue selection belt conveyor, crusher, lump coal belt conveyor and mixed coal belt conveyor, as well as auxiliary equipment such as iron remover, electric double-sided plough, electro-hydraulic sector gate and air compressor. The production process is as follows:

1, working principle

The system uses PLC as the main control unit, collects, processes and records the running state of the equipment in a unified way, and centrally controls the start and stop of the equipment. The combination of automatic control, soft manual operation and maintenance operation makes the equipment operation more convenient and flexible. At the same time, the protection devices of all equipment are unified into the centralized control system, and all kinds of protection signals are collected in real time to make rapid response. Through the configuration software of the upper computer, the running state of the equipment is displayed in real time, and all kinds of data are displayed, recorded and printed, which truly realizes the centralized monitoring of the ground production system, makes the production more reasonable and scientific, and ensures the mine safety production.

The system network diagram is as follows:

2. System composition

The centralized control system of ground production is mainly composed of centralized console, PLC control cabinet, upper industrial computer, Kingview software, communication unit, belt conveyor protection device and analog sensors such as current.

(1) The lower computer adopts Siemens S7-300PLC of Germany, which has strong functions, high reliability, flexible and convenient use, and is suitable for coal mines with high dust, high noise, strong vibration and strong interference. PLC is responsible for collecting, processing and recording the running state of the equipment in a unified way, and implementing centralized control on the start and stop of the equipment. At the same time, all kinds of protection signals are collected in real time to make a quick response.

(2) The upper computer adopts two Advantech industrial computers, an operator station, an engineer station and two hot standby computers. The main screen and sub-screen are designed by using the configuration software Kingview 6.5, including system simulation diagram, running state monitoring (start and stop), running information interface, fault alarm interface, simulation curve interface, cumulative report, etc.

(3) The upper computer communicates with the lower computer PLC through Profibus to realize distributed control. Profibus has the advantages of high transmission speed, high reliability, good openness, strong anti-interference ability and convenient installation and debugging, which improves production efficiency and management level. The network system has high cost performance and strong expansibility, which provides a guarantee for realizing comprehensive automation of ground production system and intelligent field equipment. At the same time, the PLC host can be used as the subnet of the mine management information system, which is interconnected with the whole mine network system through the switch and shares information resources.

(4) The local control box can operate the start and stop of the equipment locally, and the local operation boxes of some equipment are equipped with acousto-optic alarm devices to realize the acousto-optic alarm before starting. The system is equipped with emergency stop function to prevent danger in case of failure.

(5) Using current transformer, current transducer and upper computer to monitor the working current of high-power equipment such as crusher in real time, so as to master the load and operation of main equipment.

(6) The coal bunker uses radar level gauge to monitor the coal level in real time, and at the same time, it is uploaded to the ground PLC master station, and the current coal level status is displayed in the upper computer in real time.

3. The main monitoring equipment of the system

According to the relevant technical requirements of ground production technology, combined with the actual situation of coal mine and previous design experience, this plan will monitor the following main transportation equipment and auxiliary equipment.

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