CN203965079U - A kind of genset Stress in Piping system monitoring system - Google Patents
A kind of genset Stress in Piping system monitoring system Download PDFInfo
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- CN203965079U CN203965079U CN201420300572.7U CN201420300572U CN203965079U CN 203965079 U CN203965079 U CN 203965079U CN 201420300572 U CN201420300572 U CN 201420300572U CN 203965079 U CN203965079 U CN 203965079U
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- genset
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- main steam
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 239000013307 optical fiber Substances 0.000 claims abstract description 56
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 239000000725 suspension Substances 0.000 claims abstract description 28
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 10
- 238000000985 reflectance spectrum Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a kind of genset Stress in Piping system monitoring system, this system comprises: light source, for sending light signal; Optical fiber optical grating stress sensor, is positioned on the suspension and support of main steam line of genset and is connected with described light source by optical fiber, for monitoring the stress of main steam line, and is the light signal of the drift of fiber grating reflectance spectrum by this stress transmission; Spectral analysis module, is connected with described optical fiber optical grating stress sensor by optical fiber, for receiving the light signal from described optical fiber optical grating stress sensor, and it is carried out to spectral analysis, to obtain electric signal; And processing module, be connected with described spectral analysis module, for receiving described electric signal, draw described stress according to this electric signal.The utility model can not be subject to the impact of weather and piping vibrations, and the standoff stressing conditions of Long Real-time Monitoring main steam line, has solved the current technical matters that cannot monitor fired power generating unit main steam line suspension and support stress state.
Description
Technical field
The utility model relates to Stress in Piping system field, particularly, relates to a kind of genset Stress in Piping system monitoring system.
Background technology
Under carbon emission reduction overall background, energy-conservation, efficient, environmental protection ultra-supercritical coal-fired power generating units become electricity power enterprise's construction and operation main object, and there have been many 100MW ultra supercritical unit commitment business operations in China at present.Once high parameter, large capacity mean that operation troubles or accident occur genset, must cause tremendous economic loss, guarantee that unit safety reliability service is most important for electricity power enterprise.The stress distribution of genset critical component main steam line and the even running of local pressure state appreciable impact unit safety, evaluate the emphasis that its stress level and stress are electricity power enterprise's technical supervisions.
In unit running process, being used for the stressed suspension and support of balance main steam line inevitably can run into the effects such as vibration, impact, corresponding suspension and support degree of tightness changes, cause whole main steam line discontinuity, in piping, form excessive stress, under effect of stress, piping easily damages even security incident; Especially the P92 steel matter that ultra supercritical unit main steam line adopts, more responsive for effect of stress.The current monitoring for suspension and support stress, existing method is that the technician of power plant utilizes iron hammer to knock by rule of thumb whether degree of tightness of observe and decide suspension and support, but cannot differentiate tightness and the stress state thereof of suspension and support at all, more cannot accurately obtain the stressing conditions of the each suspension and support of whole piping.
Utility model content
The purpose of this utility model is to provide a kind of system, and this system can accurately be grasped the stressing conditions of whole piping, carries out the adjustment of suspension and support degree of tightness, optimizes piping stressed, realizes piping and extends serviceable life, guarantees the safe and reliable operation of main steam line.
To achieve these goals, the utility model provides a kind of genset Stress in Piping system monitoring system, and this system comprises: light source, for sending light signal; Optical fiber optical grating stress sensor, is positioned on the suspension and support of main steam line of genset and is connected with described light source by optical fiber, for monitoring the stress of main steam line, and is the light signal of the drift of fiber grating reflectance spectrum by this stress transmission; Spectral analysis module, is connected with described optical fiber optical grating stress sensor by optical fiber, for receiving the light signal from described optical fiber optical grating stress sensor, and it is carried out to spectral analysis, to obtain electric signal; And processing module, be connected with described spectral analysis module, for receiving described electric signal, draw described stress according to this electric signal.
Preferably, described light source adopts the one in ASE light source, LED light source or SLED light source.
Preferably, described optical fiber optical grating stress sensor is by mounting or be fixedly welded on the suspension and support of described main steam line.
Preferably, this system also comprises channel switching module, is transported to described optical fiber optical grating stress sensor for the light signal that light source is sent, and the light signal of described optical fiber optical grating stress sensor reflection is transported to described spectral analysis module.
Preferably, described channel switching module coordinates photo-coupler or photoswitch to coordinate optical circulator to form by photoswitch.
Preferably, described channel switching module is provided with multiple switching channels.
Preferably, the switching channel that described switching channel connects is connected with multiple optical fiber optical grating stress sensors of mutual series connection.
Preferably, multiple optical fiber optical grating stress sensors are connected with described multiple switching channels respectively in mode one to one.
Pass through technique scheme, monitor the stress of main steam line by optical fiber optical grating stress sensor, and the drift that is fiber grating reflectance spectrum by this stress transmission is sent to spectral analysis module, after described spectral analysis module analysis, obtain electric signal, processing module draws described stress according to the electric signal obtaining.The utility model can not be subject to the impact of weather and piping vibrations, can the standoff stressing conditions of the whole fired power generating unit main steam line of Long Real-time Monitoring, and the safe and reliable operation that monitor data accurately can be main steam line provides data reliably, solve the current technical matters that cannot monitor fired power generating unit main steam line suspension and support stress state.
Other feature and advantage of the present utility model are described in detail the embodiment part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is a kind of structural representation of genset Stress in Piping system monitoring system;
Fig. 2 is a kind of structural representation of genset Stress in Piping system monitoring system of embodiment.
Description of reference numerals
1, suspension and support; 2, optical fiber optical grating stress sensor; 3, optical fiber; 4, channel switching module; 5, spectral analysis module; 6, light source; 7, processing module.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
As depicted in figs. 1 and 2, the invention provides a kind of genset Stress in Piping system monitoring system, this system comprises: light source 6, for sending light signal; Optical fiber optical grating stress sensor 2, is positioned on the suspension and support 1 of main steam line of genset and is connected with described light source 6 by optical fiber 3, for monitoring the stress of main steam line, and is the light signal of the drift of fiber grating reflectance spectrum by this stress transmission; Spectral analysis module 5, is connected with described optical fiber optical grating stress sensor 2 by optical fiber 3, for receiving the light signal from described optical fiber optical grating stress sensor 2, and it is carried out to spectral analysis, to obtain electric signal; And processing module 7, be connected with described spectral analysis module 5, for receiving described electric signal, draw described stress according to this electric signal.Described optical fiber optical grating stress sensor 2 is fixed on the key position of main steam line suspension and support 1 by the mode that mounts or weld, key position is generally positioned at the suspension rod of main steam line suspension and support 1.Optical fiber optical grating stress sensor 2 builds based on fiber grating, and fiber grating spectral band covers C-band (1525nm-1565nm).The encapsulating structure of optical fiber optical grating stress sensor 2 will be realized strain conversion, make fiber grating experience ess-strain, and be encoded in spectrum, optical fiber optical grating stress sensor 2 can obtain the strain monitoring scope of 0-2% by subtracting sensing structure disposal route, to reach range requirement.
Described light source 6 also covers C-band, can adopt the one in ASE light source, LED light source or SLED light source.
Alternatively, this system also comprises channel switching module 4, is transported to described optical fiber optical grating stress sensor 2 for the light signal that light source 6 is sent, and the light signal that described optical fiber optical grating stress sensor 2 is reflected is transported to described spectral analysis module 5.Described channel switching module 4 coordinates photo-coupler or photoswitch to coordinate optical circulator to form by photoswitch.Described channel switching module 4 is provided with multiple switching channels.
Light source 6 by optical fiber and channel switching module 4 by optical signal transmission to the optical fiber optical grating stress sensor 2 in selected light sensing passage, 2 light signals of experiencing the strain stress of main steam line suspension and support 1 by its encapsulating structure and converting it into the drift of fiber grating reflectance spectrum of optical fiber optical grating stress sensor, therefore, the spectrum of optical fiber optical grating stress sensor 2 reflected light signals will carry strain stress value information.
Optical fiber optical grating stress sensor 2 can be arranged at main steam line suspension and support 1 with series connection or mode in parallel.The series connection here refers to an optical fiber optical grating stress sensor 2 and is together in series to be connected on a switching channel interface and uses; And parallel connection refers to multiple optical fiber optical grating stress sensors 2 and is connected with multiple switching channels respectively in mode one to one, these multiple switching channel interfaces in parallel use simultaneously, optical fiber optical grating stress sensor 2 is in parallel uses.The intensive situation in monitoring point is applicable to adopting series system, and the situation that monitoring point disperses, phase mutual edge distance is distant is applicable to adopting parallel way, can save like this length of optical fiber 3, thereby make the more orderly property of wiring of optical fiber 3.
The light signal that channel switching module 4 is reflected back optical fiber optical grating stress sensor 2 is transported to spectral analysis module 5, spectral analysis module 5 carries out spectral analysis under the control of processing module 7, this light signal is changed into electric signal, again electric signal is sent to processing module 7 carry out electric signal calculating and analysis with stress information, the stress result of all main steam line suspension and supports 1 displays on computers the most at last.
Wherein, processing module 7 is to detect by contrast optical fiber optical grating stress sensor 2 wavelength variations that main steam line suspension and support 1 STRESS VARIATION that obtains causes to combine with the mechanical property of material in database, analytical calculation draws the STRESS VARIATION of practical structures, thereby obtains monitoring the stress distribution situation at position.Processing module 7 can be other flush bonding modules such as PC104 flush bonding module, DSP flush bonding module or ARM flush bonding module.
In the present embodiment, the course of work of genset Stress in Piping system monitoring system is as follows:
Processing module 7 is controlled light source 6 and is sent wide spectrum optical, arrives optical fiber optical grating stress sensor 2 through channel switching module 4 and optical fiber 3.In operational process, be subject to the effects such as vibration, impact when main steam line suspension and support 1, the STRESS VARIATION of main steam line suspension and support 1 will be caused, the encapsulating structure of optical fiber optical grating stress sensor 2 is experienced the strain stress of main steam line suspension and support 1 and is converted it into the light signal of the drift of fiber grating reflectance spectrum, and the light signal being reflected back by optical fiber optical grating stress sensor 2 transfers to spectral analysis module 5 through channel switching module 4 again.Spectral analysis module 5 carries out spectral analysis and extraction under the control of processing module 7, and this raw electrical signal and preliminary early warning electric signal are sent to processing module 7 by the electric signal of acquisition.Processing module 7 is calculated and is analyzed the electric signal input data that receive, and draws the stress state of monitoring location, and the stress result monitoring is manifested to processing on computers.
Channel switching module 4 in the present embodiment has eight switching channels, and each switching channel connects eight optical fiber optical grating stress sensors 2 of series connection mutually, realizes each switching channel to monitoring when eight key positions on main steam line suspension and support 1.Switch successively different channel interfaces by channel switching module 4, can realize at most the stress monitoring to 64 location points on main steam line suspension and support 1, and stress result is displayed on computers.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.
In addition, also can carry out combination in any between various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (8)
1. a genset Stress in Piping system monitoring system, is characterized in that, this system comprises:
Light source, for sending light signal;
Optical fiber optical grating stress sensor, is positioned on the suspension and support of main steam line of genset and is connected with described light source by optical fiber, for monitoring the stress of main steam line, and is the light signal of the drift of fiber grating reflectance spectrum by this stress transmission;
Spectral analysis module, is connected with described optical fiber optical grating stress sensor by optical fiber, for receiving the light signal from described optical fiber optical grating stress sensor, and it is carried out to spectral analysis, to obtain electric signal; And
Processing module, is connected with described spectral analysis module, for receiving described electric signal, draws described stress according to this electric signal.
2. genset Stress in Piping system monitoring system according to claim 1, is characterized in that, described light source adopts the one in ASE light source, LED light source or SLED light source.
3. genset Stress in Piping system monitoring system according to claim 1, is characterized in that, described optical fiber optical grating stress sensor is by mounting or be fixedly welded on the suspension and support of described main steam line.
4. genset Stress in Piping system monitoring system according to claim 1, it is characterized in that, this system also comprises channel switching module, be transported to described optical fiber optical grating stress sensor for the light signal that light source is sent, and the light signal of described optical fiber optical grating stress sensor reflection is transported to described spectral analysis module.
5. genset Stress in Piping system monitoring system according to claim 4, is characterized in that, described channel switching module coordinates photo-coupler or photoswitch to coordinate optical circulator to form by photoswitch.
6. genset Stress in Piping system monitoring system according to claim 4, is characterized in that, described channel switching module is provided with multiple switching channels.
7. genset Stress in Piping system monitoring system according to claim 6, is characterized in that, the switching channel that described switching channel connects is connected with multiple optical fiber optical grating stress sensors of mutual series connection.
8. genset Stress in Piping system monitoring system according to claim 6, is characterized in that, multiple optical fiber optical grating stress sensors are connected with described multiple switching channels respectively in mode one to one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300572.7U CN203965079U (en) | 2014-06-06 | 2014-06-06 | A kind of genset Stress in Piping system monitoring system |
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| CN201420300572.7U CN203965079U (en) | 2014-06-06 | 2014-06-06 | A kind of genset Stress in Piping system monitoring system |
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| CN203965079U true CN203965079U (en) | 2014-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136360A (en) * | 2015-09-11 | 2015-12-09 | 华电电力科学研究院 | Monitoring system and monitoring method for precisely measuring thermal state load of power plant hanger |
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2014
- 2014-06-06 CN CN201420300572.7U patent/CN203965079U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136360A (en) * | 2015-09-11 | 2015-12-09 | 华电电力科学研究院 | Monitoring system and monitoring method for precisely measuring thermal state load of power plant hanger |
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| GR01 | Patent grant | ||
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Granted publication date: 20141126 |