Centralized control system of belt conveyor Feb 23, 2022

1. System introduction

The belt conveyor centralized control system combines advanced automatic control, communication, computer technology, video monitoring technology, information technology and modern management technology, controls and manages the coal mine transportation production system and statistics as a whole, and provides an overall solution to realize optimal operation, optimal control, optimal management and unattended on-site posts, so as to reduce personnel and increase efficiency, improve production and operation conditions, safety level The purpose of accident disaster prediction. The centralized control system is mainly composed of ground monitoring master station, underground monitoring substation, sensors and protection. It adopts distributed network structure, and each station can control each other independently. The figure below shows the configuration of a substation, and the microcomputer control box is used as the host of the substation to communicate with the master station to realize centralized control.

2. System function
1) A variety of control modes are available: centralized control linkage, centralized control manual, local manual and maintenance;
2) The industrial control computer in the centralized control center can centrally control the start / stop of belt conveyor, coal feeder and other equipment, and multiple belt conveyors can start and stop along the coal flow reversibly; Control the interlocking start and stop of some belt conveyors;
3) According to the starting, running and stopping characteristics required by the belt conveyor, realize the functions of automatic tensioning, soft starting, power balance, controllable braking and down running braking;
4) The system reserves interfaces with belt conveyor CST, controllable hydraulic coupler, frequency converter and other driving equipment, which can be seamlessly connected with its driving control;
5) The system is equipped with coal stacking, deviation, smoke, speed, temperature, bunker coal level, emergency stop locking, longitudinal tearing, watering, belt breaking, tension and other protection;

6) Configure video image monitoring device to monitor the working state of field equipment in real time;

7) Equipped with communication signal device, it can realize start-up notice, point signal contact, voice alarm and voice communication along the belt conveyor.
8) The monitoring industrial control computer in the ground dispatching room adopts one master and one standby, and the display adopts 22 inch color LCD, which can visually display the operation status, production condition parameters and equipment fault status of process equipment in the form of animation, graphics and Chinese characters.
9) The underground control station has a menu operation interface. All protection values can be set through the cursor and keyboard. Users can also shield unnecessary protection functions according to the site conditions.
10) The system has historical data report, historical curve query, historical fault record, fault shielding, parameter setting, display function and report printing.
11) In case of fault alarm, the fault diagnosis screen will pop up automatically, and the fault voice alarm will display the fault nature and location, which can quickly locate the fault and repair and deal with it in time.
12) System configuration communication interface: Ethernet, PROFIBUS and RS485 interfaces are available, which is easy to connect with the whole mine automation system.

3. System characteristics
1) Various control modes, rich functions and complete fault detection.
2) It has a good configuration environment, and the configuration of equipment, object, logic and interface can be completed easily and accurately under the guidance of the wizard.
3) Voice intercom, emergency stop locking and deviation along the belt are plug and play. There is no need to set an address dial switch. The system can automatically identify the model, ID and access position of the equipment along the line, which is conducive to accurately judge the nature and location of the fault.
4) Various communication interfaces, concise network structure and easy expansion.
5) Convenient installation, commissioning and maintenance.

4. Technical parameters
1) Power supply voltage: AC 1140 / 660 / 380 / 220 / 127 V, voltage adaptation range 75 ~ 110%
2) Capacity: 32 PROFIBUS \ MODBUS intelligent devices (without relay).
3) Interface type and quantity of each substation: 2 pairs of Ethernet optical ports, 4 Ethernet RJ45 electrical ports, 1 MODBUS port, 1 PROFIBUS port and 4 video electrical signal input ports.

Transmission channel:
1) Ethernet communication transmission rate is 10 / 100 Mbps, single-mode optical fiber transmission is 20km, and multi-mode optical fiber transmission is 3km;
2) Ethernet communication transmission rate is 10 / 100 Mbps adaptive, and the maximum transmission distance of electric port is 100 m;
3) When the transmission speed of PROFIBUS \ Modbus communication is 1200 BPs, the maximum transmission distance can reach 10 km;
4) The amplitude of video communication signal is 1 Vp-p (75 Ω load), and the video system is NTSC or PAL system.

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