文献翻译可编程控制技术在船用锅炉控制系统中的应用.docx

1、文献翻译可编程控制技术在船用锅炉控制系统中的应用The application of PLC technique in the control of marine boilersProgrammable foreword controller, Is called PC or PLC, It appears causes the control domain faced with a technical transformation Take the relay as the foundation engine room control device structure complex, th

2、e component are many, The reliability is bad, The breakdown sometimes occurs The current our country ships use the import complete set control device, Its function consummates, The reliability is also high, But the price is expensive Number year ago, I use import PLC am the controller, Own design th

3、e hardware, Establishment control procedure, Develops successfully the PC-GC programmable boiler combustion control installment, Substitutes for the English HAMWORTHY Corporation product In the near future the similar product will compare with this company, Performance quite, The price only is its 1

4、2.513.4 year, Altogether has PC-GC to install 12 sets in Dazing 414 and so on 6 Strip oil tanker solid ship use, Experiences the South China Sea storm and the nearly 70 high temperature adverse circumstance tests, Moves good, Does not have a breakdown The experience indicated, Introduces the minorit

5、y essential component, According to concrete control system request, Designs the appropriate software and the necessary hardware, Is the ships technological transformations and the equipment disposition good means1 system compositionThe system is composed by below several parts: Programmable forewor

6、d controller PC; Power source PS; Examination unit Cooperation unit OB; Actuation unit M; Display monitor IB; Auxiliary relay unit JB; Line bank L, Like chart 1 shows The first six parts are the control device basic composition This installment additionally builds auxiliary relay unit JB including f

7、our 8 ports intermediate relay J1, J2, J3 and J4 and 12 ports light controls relay JGC. When the controller output must actuate the high-power load, Needs to carry on the voltage or the power conversion through the intermediate relay The intermediate relay besides completes the host which it underta

8、kes to control the function, Also provides many vice- auxiliary ports, May use for the interconnection related equipment or put through the condition indicating lamp, Does this may save the host to control the unit the hardware resources After establishment line bank, The power source, the PC board,

9、 examine the component, carries out the component, operates the button, the display lamp and so on the complete contact all links to the line bank plug in, This for the equipment setup, the service and the search breakdown has provided the convenience System each part of compositions and connection。

10、2 Systems controls request2.1 Burning management control(1) Fuel oil choice The fuel may choose the heavy oil or the light oil If choice heavy oil, The oil temperature must in 80 above, The side can carry on burning The oil temperature is lower than 80 ,Then blowing-out, And the start heats up the i

11、nstallment to heat up to the heavy oil(2) Combustion control According to the start, front sweeps the gas, the ignition, opens the #1 spray hole, opens the #2 spray hole the order to start boiler burning; After closes the #2 spray hole, closes the order blowing-out which the #1 spray hole, sweeps wa

12、s mad(3) Steam pressure intermittent control According to boiler steam pressure p AND gate limiting value p1 (0.7MPa, p2 (approximately 0.6MPa) controls two spray holes approximately) the work When pp1,#1, the #2 spray hole closes; When p1pp2,The #1 spray hole alone works; When p2p,#1, the #2 spray

13、hole opens。(4) Boiler water monitor the boiler water level uses the pair of position control mode, which knew very well, Therefore, does not give relates in detail2.2 Interconnection protections(1) Steam overpressure interconnection The steam pressure arrives reports to the police threshold value p0

14、 (approximately time 0.72MPa), Sends out the steam overpressure the warning, Blowing-out, And shuts off the load power source, Stops to all executions component power supply(2) The boiler water level reports to the police The establishment high reports to the police the water level and the lowest da

15、nger warning water level When controls malfunctions, The water level surpasses reports to the police the water level, Then sends out the high water mark to report to the police, And shuts off the feed pump electric motor power source When the water level is lower than the danger warning water level,

16、 Then sends out the low water level to report to the police, Boiler blowing-out。(3) The emergency blowing-out protects When the collection controls Taiwan to have the blowing-out to order, Then sends out the emergency blowing-out the warning, Boiler blowing-out(4)Heavy oil temperature control interconnection When choice heavy oil, The oil temperature is higher than 80 procedures to be able to move The oil temperature lowly is lower than this value, S