Xuntian software transportation subsystem

  1、 1 System scheme design i
1
1 System description
The safety and reliability of belt production centralized control system directly affects the economic benefits of the mine

The belt production centralized control system can realize the telemetry, remote control and remote signaling of the transportation system of each belt conveyor, improve the production efficiency, reduce the accident rate, reduce the fault handling time, reduce the on-site operators and improve the economic benefits

The belt production centralized control system designed by our company adopts advanced parallel processing technology; It has the advantages of convenient operation, flexibility, high reliability and stronger anti-interference ability
Distributed control structure is adopted, with complete protection functions
It has perfect detection and protection functions such as belt deviation protection, speed detection, slip and overspeed protection, emergency stop locking, coal stacking detection, temperature detection, smoke detection and belt longitudinal tear protection
It has strong on-site programmable function and networking function
It adopts open programming software and open data communication protocol, and can be connected with comprehensive intelligent and information system

n  The system has centralized control and local control modes, including automatic, manual and maintenance modes;
n  Safe, stable and reliable implementation & ldquo; Start the car against the coal flow and stop along the coal flow & rdquo;
n  It can display whether each belt and coal feeder start and stop, as well as the current, voltage and temperature of large load motor

n  It has perfect protection functions, such as deviation, emergency stop, smoke, tear, roller temperature, etc

n  It has perfect voice alarm function

n  The system can monitor the operation of the whole underground system through the upper computer in the ground centralized control room, and timely understand the equipment operation and faults

n  The upper computer in the centralized control room can store all kinds of collected data of the belt, and can query for more than half a year

n  Data communication function: Ethernet communication module is installed in each control stand-alone, which can realize the communication between each stand-alone and the host, complete the centralized control system of multiple belt conveyors, connect with the host computer, and connect to the mine intelligent platform and other networks through OPC interface
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2 Topological diagram of belt centralized control system
The main transportation monitoring system is mainly composed of upper computer, PLC control system and belt protection sensor
The network topology is as follows:
 
1
Upper computer
This time, the host computer is not set separately, and the comprehensive intelligent platform is used as the host computer to manage the whole system

2
PLC control system
As the core of the underground control part, PLC control system completes the interactive transmission of information with the belt conveyor and its sensors, and displays the operation of the whole system through the embedded industrial computer
An explosion-proof PLC control cabinet (including PLC control system as the master station) is configured at the belt head of the main shaft, and an explosion-proof PLC control cabinet (including PLC control system as the slave station) is configured for the downhill belt and the primary belt head respectively
The slave station and the master station are connected through optical fiber, and the master station is connected to the nearby industrial ring network to realize remote data transmission

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3 Belt protection sensor configuration
Sensor distribution principle: each belt is equipped with an intrinsically safe speed sensor, an intrinsically safe belt longitudinal tear sensor and mine intrinsically safe smoke sensor; An intrinsically safe emergency stop sensor is arranged every 100m, and a pair of intrinsically safe deviation sensors are arranged every 100m; Each belt transfer head is equipped with a coal blockage sensor; One public address telephone shall be arranged every 100m along the belt

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4 Technical performance of belt centralized control system
System startup and shutdown process
The starting / stopping principle of the equipment is: start against the coal flow and stop along the coal flow

control model
The system has two control modes: centralized control and local control, and three working modes: centralized automatic, centralized / local manual and local maintenance

The control principle is: focus on centralized control operation, and give priority to local shutdown in case of abnormal conditions

Centralized operation modes can be divided into & ldquo; Centralized & mdash; Auto & rdquo; And & ldquo; Centralized & mdash; Manual & rdquo; Two (interlocked with local maintenance mode)
“ Centralized & mdash; Auto & rdquo; The mode is to select switches and buttons on the mining intrinsically safe console, combined with the mining flameproof display screen, according to & ldquo; Reverse coal flow start, stop along coal flow & rdquo; Realize the one key start and stop of coal flow
It can also start and stop with one click through the computer keyboard and mouse in the dispatching room, combined with the color display of industrial computer (operation authority is set in this mode)
“ Centralized & mdash; Manual & rdquo; The mode is to realize the start and stop control of single equipment through the selection switch and button of mining intrinsically safe console and combined with mining flameproof display screen
In this way, the interlocking relationship between equipment can be easily set or cancelled
This mode is mainly used for the trial operation of the equipment, and can also be used as a supplementary operation mode during normal production

Local control mode
Local operation modes can be divided into & ldquo; In place & mdash; Manual & rdquo; And & ldquo; In place & mdash; Overhaul & rdquo;
“ In place & mdash; Manual & rdquo; The button on the local control box can automatically start and stop a single belt, and the interlocking between equipment can be set and released on the PLC control box

“ In place & mdash; Overhaul & rdquo; This mode is used to test run a single operating mechanism of a single equipment to maintain and repair the equipment

Control characteristics
l  During centralized control, the belt conveyor and coal feeder are locked, and the front belt and rear belt of overlapping belt are locked

l  During local control, the belt can meet different operation modes such as inching, low-speed belt inspection operation and normal production operation

l  There is audible and visual warning before the equipment is started, and the warning information is transmitted to each belt along the line through the public address telephone

l  When a belt breaks down, the equipment stops immediately before the coal flow to prevent coal blockage
After the coal flow, the equipment continues to operate until the belt is empty to avoid heavy load start of the belt

l  When the communication between the main station and the sub station is blocked, it can be switched to the local communication state conveniently

Status display
l  Equipment information display: it has the status display function of driving motor and brake; Motor current and temperature display

l  Sensor simulation shows: belt speed, drum temperature, tension of tensioning device and bunker height

l  Sensor switch display: emergency stop, deviation, coal stacking, smoke, tearing, public address telephone locking, etc

Voice signal system
l  The key positions (points) of the belt are equipped with signal and voice systems

l  When starting and stopping the belt, use signal contact, set signal locking and start early warning

l  In case of equipment failure, the specific failure can be broadcast and transmitted to the public address telephones along the line

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5 Design of system software
Display function
The main operating conditions and dynamic parameters of each belt protection system are displayed on the computer
On the computer screen, the working status of the winder and various protection sensors are displayed in real time, such as belt startup
State and running speed, driving motor voltage, current, power and other parameters
On the computer screen, the start and stop status of belt and coal feeder and the coal level height of coal bunker are displayed in real time at the same time
On the computer screen, the fault type, time and number of faults of the belt conveyor are displayed at the same time