To realize the safe and efficient operation of belt conveyor, not only the independent control subsystem of a single belt conveyor, but also the main control computer which can control and coordinate the command subsystems, and the network control of the main coal flow centralized control, ground dispatch monitoring and control are important directions for the development of belt conveyor centralized control.
The significance of realizing automatic control of belt conveying system is as follows:
1. By controlling the sequence of belt conveyors, belt idling can be reduced, effective startup rate can be increased, reactive power consumption can be reduced, and cost can be reduced.
2. It can greatly reduce the number of nursing staff, reduce the wage input accordingly, and enrich the equipment maintenance and repair team, improve the quality of maintenance, reduce accidents, change passive maintenance to active periodic maintenance, and improve the utilization rate of equipment.
1. There is a programmable PLC control box beside the head of each equipment, and there are working mode switch and local start-stop button.
2. Coal heap protection and longitudinal tear protection are provided at all feeding points of belt conveyors to prevent the expansion of belt conveyor accidents.
3. All belt conveyors are equipped with deviation switches, and a pair of deviation switches are set every 100 meters.
4. All belt conveyors are equipped with pull-in switches for emergency parking. The installation spacing of pull-in switches for emergency parking is determined to be 100 meters, and the deviation protection of the lower belt can be extended to ensure equipment and personal safety.
5. Coal-piling sensors are installed in the belt head to prevent the occurrence of coal-piling accidents of the belt.
6. A belt speed sensor is installed on the belt conveyor to detect belt overspeed and skidding accidents.
7. A smoke sensor is installed in the belt roadway to detect the smoke concentration in the belt roadway to prevent fire accidents.
8. Temperature sensors are set in the main drum of the belt conveyor to detect the temperature of the drum at any time, and automatic sprinkler is equipped to realize automatic sprinkler when the drum is over-temperature and to cool the main drum.
9. The belt conveyor is equipped with starting early warning device every 100 meters. The early warning signal is sent out before the equipment starts, prompting the relevant personnel to stay away from the equipment immediately.
10. The real-time current monitoring function of the motor can discover the potential fault hidden danger of some mechanical equipment. The current of the motor is monitored and analyzed in real-time during operation. When the current exceeds the limit or mutates, it will alarm and stop when the current is serious.
11. Realize the blocking of coal feeder and belt, realize the blocking function with previous belt, and have automatic, manual, maintenance and other control modes;
12. The centralized control system has good performance of anti-humidity and anti-interference. It can quickly repair or replace components when the structure meets the underground conditions. According to the field environment of underground coal mine, the power box adopts explosion-proof structure.
13. According to the fault nature of belt conveyor system, emergency shutdown, sequential shutdown or alarm sound and light signals can be sent out.
14. On the centralized console, the working state, fault type and fault location of each belt conveyor can be displayed centrally.
15. Various operation modes. The control modes include: ground remote centralized control, underground remote centralized control, underground in-situ control, underground maintenance control, underground manual control and so on, which makes the operation of the system flexible and reliable. In the centralized mode, all the equipment is operated by the operator of the centralized control room through the upper computer.
16. Perfect information processing function, alarm information, operation parameters, operation records and other information automatically form standard format database files, and save them for information system calls;
17. Achieve centralized monitoring of the system and computerized management of production data.
1. Selecting advanced Siemens controller, the system has good real-time performance, high reliability and data processing speed.
2. The system has high security by using fully distributed control structure. When the control failure occurs in the local part, centralized control operation can still be realized in the underground part.
3. The communication network has the advantages of high speed, long distance and high reliability.
4. The interface is intuitive and friendly, and the operation is simple and the function is complete. Man-machine interface not only has vivid dynamic picture and full Chinese display, but also has real-time alarm monitoring, security confirmation mechanism and data recording function.
5. Reduce the cost of wiring. Because of the use of long-distance optical fiber communication network, the wiring is more convenient and the cable consumption is greatly reduced.
6. Easy maintenance and low operation cost. The system is easy to expand and can add nodes at any time.
The system consists of industrial computer, printer, UPS power supply, power arrester, KXJ-0.5/1140 (660) mine flameproof and intrinsically safe PLC control box, KJ144-J mine information transmission interface, mine flameproof transmission substation, mine flameproof optical terminal machine, mine flameproof solenoid valve, THK-I mine intrinsically safe control console, GEJ (A) deviation sensor, KHJ0.5/24 (B) mine intrinsically safe emergency stop switch, G, G. VD300 mine intrinsically safe tear sensor, GW 100 (A) temperature sensor, GQQQ5 smoke sensor, GUJ (A) coal level sensor, GS4 (A) speed sensor, ZHJ-FD mine intrinsically safe signal amplifier, ZHJ-C weighing sensor, mine flame-retardant communication cable, mine flame-retardant communication cable.
1. Technical Support and Services
The technical support, installation, commissioning and after-sales service of the system are fully undertaken by Huainan Wantai Electronics Co., Ltd. The company is a comprehensive development and production unit. It is a high-tech enterprise integrating scientific research and development, production and operation, and engineering installation. It has rich engineering experience in the field of coal mine automation and informationization. The company has dozens of professional engineering and technical teams, scientific customer management system (CRM), and sufficient spare parts guarantee that it can provide fast and professional services to users at any time. 。
2. Installation Services
Huainan Wantai Electronics Co., Ltd. has always attached great importance to engineering management and regarded engineering quality as the foundation of enterprise survival. The company carries out the whole process of professional management for each project. For each winning project, the company will appoint a full-time project manager to be responsible for the whole process of the project, which mainly includes contract negotiation, work schedule and project implementation plan, organization and coordination of the work of the project team, liaison with the project manager of the buyer, regular oral or written report to the buyer on the progress of the project, and discussion of the existing problems in the project. Questions and acceptance of user supervision, formulation of project acceptance documents and collation, summary of technical documents.
3. Service during the shelf life
After acceptance of the system, the warranty period begins. The shelf life is 24 months, and the system is maintained free of charge during the shelf life.
Huainan Wantai Electronics Co., Ltd. has a quality service hotline. Users can use telephone, fax and e-mail to carry out warranty. Whether they are during or outside the warranty period, they can submit a 7*24-hour repair report, and the response time of the repair is 2 hours to provide solutions.