CN1290833A - Boiler expansion monitoring and displaying management system - Google Patents
Boiler expansion monitoring and displaying management system Download PDFInfo
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- CN1290833A CN1290833A CN 00130246 CN00130246A CN1290833A CN 1290833 A CN1290833 A CN 1290833A CN 00130246 CN00130246 CN 00130246 CN 00130246 A CN00130246 A CN 00130246A CN 1290833 A CN1290833 A CN 1290833A
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- boiler
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Abstract
The system capable of remotely monitoring the expansion amount of some important parts of boiler consists of three parts including three-dimensional displacement sensing indicator, data acquisition system and computerized processing system. The expansion displacement sensing indicator converts the three dimensional expansion displacement into electric signal, the signal is collected by the data acquisition system and calculated and analyzed in computer and the expansion amount is displayed on CRT graphically or in analogue diagram mode. The present invention makes it possible for the operator to understand the expansion state of boiler easily.
Description
The present invention relates to a kind of boiler operating parameter measurement mechanism, more precisely, relate to a kind of measurement mechanism of boiler plant swell increment.
The integral body that boiler is made up of the piping and the steel construction of various complexity will produce expansion after being heated.Because each position material difference, heating temperature difference, the swell increment of generation are also different.When hot operation, cold conditions is installed the boiler of coordinating and is wanted dilatational strain, because the structure of stove internal heating surface is different with thermal load, steam-water pipe, smoke wind pipe, pulverized coal channel structure and internal working medium thermal parameter difference, stove external and internal fixation structure and connected mode etc. are varied, so the swell value at each position and direction also are various.How coordinating the mutual relationship of these expansions, is to guarantee boiler component free expansion, injury-free, and the key of security and tightness during the boiler thermal-state operation.
Therefore some significant points at boiler all require to install the indicator that can indicate this position swell increment.The expansion indicator of boiler all is mechanical both at home and abroad at present, this expansion indicator is to indicate swell increment with a draw point that is welded on the swelling part on an iron plate of being decorated with coordinate grid, can only indicate two-dimensional directional, and precision is low inaccurate, damage is difficult for discovering, and is unfavorable for timely maintenance.The expansion indicator installation site disperses on the boiler, and condition of work is abominable, must hurry back and forth up and down when the operations staff observes, and is very inconvenient, and danger close, so just requires just can observe at central station of floating dock the equipment of boiler key position expansion situation.
The management system for monitoring that the purpose of this invention is to provide a kind of energy real-time remote monitoring boiler significant points swell increment.This system can be reflected in the expansion displacement amount at boiler component scene in the pulpit intuitively, at any time check for the operations staff, visual in image, the operations staff also needn't go boiler field observation boiler component expansion situation again, exempting the operations staff hurries back and forth up and down for the expansion of observing boiler, alleviate operations staff's working strength, reduced danger, improved the operation level of fired power generating unit.
For achieving the above object, the present invention is made up of the three-dimensional expansion displacement sensing indicator, data acquisition system (DAS) and the computing machine that expansion displacement are transferred to electric signal.This system utilizes highly sensitive expansion displacement sensing indicator, convert the three-dimensional expansion displacement of boiler component to electric signal, after gathering by data acquisition system (DAS), be input in the computing machine, handle through computational analysis, be presented on the CRT of master-control room with the form of chart and simulation drawing.Clear and intuitive, be very easy to the expansion situation that the operations staff understands boiler in real time.
Swell increment and theoretical swell increment comparison diagram when there are normal startup in each position of boiler and blowing out in this system, for the operations staff boiler expansion amount and normal value under the standing state are compared, and can be linked into the automatic control system of boiler plant, in time regulate burning, the control warming and cooling rate.This system can provide section boiler expansion change curve sometime, in order to the expansion situation analysis of emergency review and boiler.This system also can access historical expansion data, for analyzing reference, seeks the optimum operation regulative mode.
To most preferred embodiment of the present invention, the expansion monitoring and displaying management system of joining the 300MW unit boiler is elaborated below in conjunction with accompanying drawing.
Fig. 1 is the boiler expansion monitoring and displaying management system system diagram
Fig. 2 is a three-dimensional expansion displacement sensing indicator front view
Fig. 3 is a three-dimensional expansion displacement sensing indicator side view
Fig. 4 is the displacement trasducer front view
Fig. 5 is the displacement trasducer vertical view
Fig. 6 is the system service program block diagram
Fig. 7～12nd, the main display interface figure of this system
Native system mainly is made up of three parts, as shown in Figure 1.Part 1 is a three-dimensional expansion displacement sensing indicator, and part 2 is a data acquisition system (DAS), and the 3rd part is a computer processing system.According to design, the 300MW unit boiler has 32 parts need carry out the swell increment monitoring, needs 32 three-dimensional expansion displacement sensing indicators of configuration.Three-dimensional expansion displacement sensing indicator is transformed into voltage signal with the displacement signal that collects, and is converted to digital data transmission through data acquisition system (DAS) and gives computing machine, and machine directly is presented on the monitor of pulpit after handling as calculated, for operations staff's monitoring.(1), three-dimensional expansion displacement sensing indicator
This sensing indicator structure such as Fig. 2, shown in Figure 3 mainly close 2 housing 3 multiturn potentiometers, 4 displacement trasducers 5 by pointer 1 wiring and guide rail 6 is formed.The work on the spot condition very severe of boiler plant, contamination by dust is serious, noise is high, and various Electromagnetic Interference are also very serious.According to these restriction conditions, the present invention utilizes the Ohm law principle, i.e. electric current one timing, and the voltage at resistance two ends changes with changes in resistance.Because three-dimensional expansion displacement sensing indicator installation site dust is very serious, the present invention utilizes the good multiturn potentiometer of sealing property, and runner is connected with multiturn potentiometer, and runner rotates and drives the multiturn potentiometer rotation, and resistance changes.The rotation of runner is converted into shift length again, and shift length has just been set up corresponding relation with resistance like this.Select for use ampere level constant-current supply to send electricity,, just can converse shift length by measuring the voltage at potentiometer two ends to multiturn potentiometer.Select a volt step voltage output for use, can grow distance on the one hand and carry, but the also interference of anti-electromagnetic wave on the other hand.
Three-dimensional expansion displacement sensing indicator moves along guide rail 6 by the pointer 1 drive displacement trasducer 5 that is welded on the boiler component, displacement trasducer is measured the distance L that moves along guide rail, guide rail rotates along axle simultaneously, the drive multiturn potentiometer rotates, can measure the angle θ that guide rail rotates, in the displacement of calculating X, Y direction with trigonometric function, X=LCOS θ, Y=LSIN θ.Because pointer 1 is vertical mutually with guide rail 6, pointer is when the drive displacement trasducer moves, with displacement trasducer relative motion is arranged again, the runner that drives in the displacement trasducer rotates, measure the displacement of Z direction, the space displacement behind the boiler component expanded by heating just is decomposed into X, Y, three directions of Z like this.
Displacement trasducer 5 structures such as Fig. 4, shown in Figure 5 mainly are made up of runner 7 bracing frames 8 and multiturn potentiometer 4.Be fixed on the runner on the bracing frame, roll at the drive lower edge of pointer guide rail 6, runner shaft drives multiturn potentiometer 4 and rotates, and resistance changes along with the rotation of runner.The mobile variation that is converted to resistance of pointer X, Y, three directions of Z like this.
Utilize constant-current supply to send electricity by the data acquisition system (DAS) cable to resistance, the voltage signal at resistance two ends is seen off measured again, such three displacements just are converted into measurable electric signal and (v), are transferred to data acquisition system (DAS) again.
This sensing indicator can keep traditional mechanical formula expansion indicator in the function of indicating boiler component expansion displacement amount on the spot at the displacement of the bigger both direction of the expansion displacement that indicates boiler component on the spot simultaneously.(2), data acquisition system (DAS)
This system has 32 place's swell incremenies to measure, and because of being that three-dimensional expands, there is the voltage signal of three directions at every place, has 96 voltage signals and need carry out the A/D conversion.Therefore this system is made up of 3 32 passage A/D transition cards, constant-current supply, 6 core cables.By 6 core cables a plurality of three-dimensional expansion displacement sensing indicators and A/D transition card and constant-current supply are together in parallel and form closed-loop system.Constant-current supply is set the direct current that is output as 5A, and the voltage signal that A/D transition card periodic scanning expansion sensing indicator transmits is transferred to dilatometer calculation and Analysis display system after the A/D conversion.(3), swell increment computational analysis system
This system is made up of computing machine, CRT, printer.A/D transition card and computing machine link with the slot form.The signal that is transmitted by data acquisition system (DAS) as calculated after the computer analyzing and processing, is presented on the CRT with the form of data list, three-dimensional block diagram and sub-unit, for operations staff's real time monitoring, instructs operation.
The computing machine of this system is selected the magnificent industrial computer that grinds of the conventional configuration of a plurality of ISA slots for use.1. software procedure
Software programming WINDOWS95 application program drives the A/D card with C++ establishment dynamic link library, with the VB interface that programs.
Enter into System self-test after the start, drive the A/D card, each expansion indicator is scanned with C++ establishment dynamic link library, whether have electric signal, normally image data, normally image data if detecting each measuring point, then write down currency, and be made as initial value Uo; As normal image data, then which measuring point of tabulation prompting is undesired, prompting maintenance or reject this point.According to boiler startup programming rate initialization system data scanning frequency, generally to set 1 time/minute, the data that scanning comes enter into calculation procedure.
The corresponding 0-400mm of the resistance of preseting length direction 100-500 Ω, angle 0-90 ° of corresponding 100-500 Ω resistance.Computing formula is: R
L=U
L/ I R
θ=U
θ/ I R
z=U
z/ I Ro=Uo/IL=(R
L-Ro) * (400-0) ÷ (500-100)=(U
L-Uo)/IX=L * COS θ Y=L * SIN θ θ=(R
θ-Ro) * (90 °-0) ÷ (500-100)=(U
θ/ I-Uo/I) * 90 ° ÷ 400Z=(R
z-Ro) * (400-0) ÷ (500-100)=(U
z-Uo)/I
Wherein X, Y, Z be respectively X, Y, Z direction the expansion displacement value, R
L, U
LBe the resistance and the magnitude of voltage of L direction, R
z, U
zBe the resistance and the magnitude of voltage of Z direction; R
θ, U
θBe resistance and the magnitude of voltage of angle θ; Ro, Uo are initial resistance and magnitude of voltage; I is a current value, is set at 5A; θ is the anglec of rotation.
Automatically be stored in the database of hard disk through the data after calculating, and show in each functional module on display.2. system function module interface
Enter into the main display interface of system of Fig. 7～12 behind the system boot.Be that (whether write down the initial value of each expansion indicator automatically, it is normal to detect each measuring point for main surface chart among Fig. 7.) Fig. 8 is that each functional block surface chart 9 is that numerical tabular (shows the expansion displacement amount of each parts, and notes by date, as historical data management.) Figure 10 shows the swell increment situation of change with digital form on the position of boiler stereographic map, show at random.Figure 11, the 12nd shows the expansion situation displayed map of each parts
The original position of cold conditions is with green; The current position that expand into is with red.
Claims (4)
1. boiler expansion monitoring and displaying management system, it is made up of three-dimensional expansion displacement sensing indicator, data acquisition system (DAS), computer processing system three parts; This system three-dimensional expansion displacement sensing indicator, convert the three-dimensional expansion displacement of boiler component to electric signal, after the data acquisition system (DAS) collection, be input in the computing machine, handle through computational analysis, form with chart and simulation drawing is presented on the CRT of master-control room, and is clear and intuitive, makes things convenient for the operations staff to understand the expansion situation of boiler plant in real time.
2. boiler expansion monitoring and displaying management system according to claim 1 is characterized in that, three-dimensional expansion displacement sensing indicator wherein can be measured boiler component three-dimensional expansion displacement, and is converted into electric signal output.
3. boiler expansion monitoring and displaying management system according to claim 1 selects for use 1～24 ampere of level constant-current supply to send electricity to multiturn potentiometer, selects a volt step voltage output for use, and can grow distance on the one hand and carry, but the also interference of anti-electromagnetic wave on the other hand.
4. boiler expansion monitoring and displaying management system according to claim 1 is characterized in that, with the form of three-dimensional block diagram of boiler and the sub-unit simulation drawing main surface chart as this system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001302469A CN1143979C (en) | 2000-11-01 | 2000-11-01 | Boiler expansion monitoring and displaying management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001302469A CN1143979C (en) | 2000-11-01 | 2000-11-01 | Boiler expansion monitoring and displaying management system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290833A true CN1290833A (en) | 2001-04-11 |
| CN1143979C CN1143979C (en) | 2004-03-31 |
Family
ID=4594054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001302469A Expired - Fee Related CN1143979C (en) | 2000-11-01 | 2000-11-01 | Boiler expansion monitoring and displaying management system |
Country Status (1)
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|---|---|
| CN (1) | CN1143979C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706317A (en) * | 2012-06-21 | 2012-10-03 | 华北电力大学（保定） | Online monitoring device for thermal expansion amount of pressure-containing member of power station boiler |
| CN102818251A (en) * | 2012-08-15 | 2012-12-12 | 华北电力大学 | Power station boiler heat expansion monitoring system and measuring method based on acoustical principle |
| CN104034232A (en) * | 2014-06-17 | 2014-09-10 | 攀钢集团西昌钢钒有限公司 | Furnace body expansion measurement method used for small experimental coking furnace |
| CN104832906A (en) * | 2015-05-21 | 2015-08-12 | 北京源深节能技术有限责任公司 | Boiler expansion detection monitoring system |
| CN107607046A (en) * | 2017-08-24 | 2018-01-19 | 武汉大学 | A kind of boiler expansion monitoring system based on plastic optical fiber looped network |
| CN109737376A (en) * | 2018-12-28 | 2019-05-10 | 河北涿州京源热电有限责任公司 | The system and method for the explosion-proof three-dimension monitor of boiler of power plant abrasionproof |
| CN110487239A (en) * | 2019-08-15 | 2019-11-22 | 内蒙古京能双欣发电有限公司 | Boiler expansion on-line monitoring system |
| CN112129240A (en) * | 2020-08-06 | 2020-12-25 | 京能秦皇岛热电有限公司 | Boiler expansion on-line monitoring method |
| CN112179277A (en) * | 2020-09-28 | 2021-01-05 | 北京必可测科技股份有限公司 | Power station boiler expansion detection method and pipeline system weld dynamic detection method |
-
2000
- 2000-11-01 CN CNB001302469A patent/CN1143979C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706317A (en) * | 2012-06-21 | 2012-10-03 | 华北电力大学（保定） | Online monitoring device for thermal expansion amount of pressure-containing member of power station boiler |
| CN102706317B (en) * | 2012-06-21 | 2015-06-17 | 华北电力大学（保定） | Online monitoring device for thermal expansion amount of pressure-containing member of power station boiler |
| CN102818251A (en) * | 2012-08-15 | 2012-12-12 | 华北电力大学 | Power station boiler heat expansion monitoring system and measuring method based on acoustical principle |
| CN104034232A (en) * | 2014-06-17 | 2014-09-10 | 攀钢集团西昌钢钒有限公司 | Furnace body expansion measurement method used for small experimental coking furnace |
| CN104034232B (en) * | 2014-06-17 | 2017-05-24 | 攀钢集团西昌钢钒有限公司 | Furnace body expansion measurement method used for small experimental coking furnace |
| CN104832906A (en) * | 2015-05-21 | 2015-08-12 | 北京源深节能技术有限责任公司 | Boiler expansion detection monitoring system |
| CN107607046A (en) * | 2017-08-24 | 2018-01-19 | 武汉大学 | A kind of boiler expansion monitoring system based on plastic optical fiber looped network |
| CN107607046B (en) * | 2017-08-24 | 2019-10-25 | 武汉大学 | A kind of boiler expansion monitoring system based on plastic optical fiber looped network |
| CN109737376A (en) * | 2018-12-28 | 2019-05-10 | 河北涿州京源热电有限责任公司 | The system and method for the explosion-proof three-dimension monitor of boiler of power plant abrasionproof |
| CN110487239A (en) * | 2019-08-15 | 2019-11-22 | 内蒙古京能双欣发电有限公司 | Boiler expansion on-line monitoring system |
| CN110487239B (en) * | 2019-08-15 | 2020-11-03 | 内蒙古京能双欣发电有限公司 | Boiler expansion on-line monitoring system |
| CN112129240A (en) * | 2020-08-06 | 2020-12-25 | 京能秦皇岛热电有限公司 | Boiler expansion on-line monitoring method |
| CN112129240B (en) * | 2020-08-06 | 2021-08-10 | 京能秦皇岛热电有限公司 | Boiler expansion on-line monitoring method |
| CN112179277A (en) * | 2020-09-28 | 2021-01-05 | 北京必可测科技股份有限公司 | Power station boiler expansion detection method and pipeline system weld dynamic detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1143979C (en) | 2004-03-31 |
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