CN203847177U - Fast closing process monitoring device for steam turbine main valve and adjusting valve - Google Patents
Fast closing process monitoring device for steam turbine main valve and adjusting valve Download PDFInfo
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- CN203847177U CN203847177U CN201420254456.6U CN201420254456U CN203847177U CN 203847177 U CN203847177 U CN 203847177U CN 201420254456 U CN201420254456 U CN 201420254456U CN 203847177 U CN203847177 U CN 203847177U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 239000003921 oil Substances 0.000 claims description 31
- 238000005259 measurement Methods 0.000 claims description 12
- 239000010705 motor oil Substances 0.000 claims description 8
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000003745 diagnosis Methods 0.000 description 5
- 230000004807 localization Effects 0.000 description 4
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- 238000013481 data capture Methods 0.000 description 2
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- 230000032683 aging Effects 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
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Abstract
The utility model discloses a fast closing process monitoring device for a steam turbine main valve and adjusting valve. The closing adjusting process monitoring device for the steam turbine main valve and adjusting valve can conduct real-time monitoring and online fault positioning, and can reduce operational risks of a steam turbine. The fast closing process monitoring device comprises n main valve displacement transmitters for measuring the opening degree of the steam turbine main valve, m adjusting valve displacement transmitters for measuring the opening degree of the steam turbine adjusting valve, a first pressure sensor for measuring the oil pressure of a hydraulic servo-motor, a second pressure sensor for measuring the AST oil pressure, a trip circuit for measuring trip signals, a high-speed data collecting device and a computer. The fast closing process monitoring device for the steam turbine main valve and adjusting valve has the advantages that the real-time online continuous monitoring of the steam turbine valve closing process can be achieved, evaluation early warning can be carried out on the state of the valves, fast fault positioning can be achieved, and the fast closing process monitoring device is of great significance in achieving equipment predictability maintenance, reducing operation security risks and ensuring reliable operation of the steam turbine.
Description
Technical field
The utility model belongs to steam turbine monitoring technical field, relates to a kind of steam turbine main inlet throttle-stop valve and regulates fast-valving process monitoring device.
Background technique
Generator set hypervelocity is the serious accident in thermal power plant, can cause great harm to safety in production, enterprise is produced to even people's lives and cause significant impact, and turbine admission valve to close slow even bite be the main cause that causes hypervelocity, in Its Relevant Technology Standards, clearly regulation must be carried out valve closing time test.Yet the valve closing time is Millisecond, the control system of situ configuration is because of the long demand that cannot meet valve closing time test of sampling period at present, simultaneously in valve opening measurement links also Shortcomings, be mainly manifested in: current all steam turbine are all that the stroke of measuring valve oil engine represents valve opening, but the stroke of oil engine can not truly reflect valve opening when there is the faults such as valve door bar comes off; In addition the partial admission valve of steam turbine adopts position limit switch to measure the method for valve open/close state, while there is the problems such as poor contact of contacts at position limit switch, valve state loses monitoring, and test can not reflect the trend of valve closing overall process during the shut-in time, be not easy to trouble analysis.
Valve closing time test method is by valve oil engine stroke under unit outage state at present, the signal such as position limit switch access high-speed record instrument is tested and is carried out off-line manual analysis, under steam turbine operation state, cannot test, but during steam turbine operation due to temperature distortion, the reasons such as gap variation cause the probability of the slow even bite of valve closing larger, cause unit valve state to lose monitoring means in normal operation, after breaking down, valve can not find in time, there is great potential safety hazard, therefore need to realize on-line monitoring, the closing process of steam turbine valve while monitoring unit tripping in real time.Due to the reason more complicated of failsafe valve, trouble location location difficulty after valve breaks down, often needs again simulated failure state to investigate one by one, is therefore necessary to carry out on-line monitoring and fault diagnosis simultaneously.
Model utility content
Technical problem to be solved in the utility model is to provide that a kind of energy can be monitored in real time, online fault localization, reduce steam turbine operation risk steam turbine main inlet throttle-stop valve with regulate fast-valving process monitoring device.
For solving the problems of the technologies described above adopted technological scheme, be a kind of steam turbine main inlet throttle-stop valve and adjusting fast-valving process monitoring device, comprise that the 1st the 1st to the m adjusting porthole displacement transducer to n main inlet throttle-stop valve displacement transducer, measurement Steam Turhine Adjustment porthole aperture of MEASUREMENT OF STEAM turbine main steam valve is, trip circuit, high-speed data acquiring device and the computer of the first pressure transducer of measuring oil engine oil pressure, the second pressure transducer of measuring AST oil pressure, measurement trip signal; Described n is more than or equal to 2 integers that are less than 12; Described m is more than or equal to 2 integers that are less than 12;
The described the 1st is arranged on steam turbine main inlet throttle-stop valve door bar to n main inlet throttle-stop valve displacement transducer; The described the 1st to m regulates porthole displacement transducer to be arranged on Steam Turhine Adjustment porthole door bar;
Described the first pressure transducer is arranged on admission valve oil engine; Described the second pressure transducer is arranged on AST oil pipe line; The relay normally open contact J-1 two ends of the input termination emergency trip system ETS of described trip circuit;
The described the 1st output terminal to n main inlet throttle-stop valve displacement transducer, the 1st to m adjusting porthole displacement transducer, the first pressure transducer, the second pressure transducer and trip circuit connects respectively the respective input of described high-speed data acquiring device; The output terminal of described high-speed data acquiring device is connected with computer by USB port.
Described trip circuit comprises relay J 1; The coil of described relay J 1 connect with the relay normally open contact J-1 of emergency trip system ETS after between the positive pole and negative pole of be connected on+24V DC electrical source, the normally-closed contact J1-1 two ends O1 of described relay J 1 and O2 connect respectively the corresponding trip signal input end of described high-speed data acquiring device.
The model of described displacement transducer is LVDT; The model of described the first pressure transducer is 3051CG; The model of described the second pressure transducer is 3051CG; The model of described high-speed data acquiring device is CompactDAQ-9229; Described relay model MY4J; The model of described computer is X201.
The beneficial effects of the utility model are: the utility model is for the drawback of current steam turbine valve closing process monitoring method, a kind of steam turbine valve closing process on-Line Monitor Device and method for diagnosing faults have been proposed, can realize the real-time online of steam turbine valve closing process monitors continuously, valve state is evaluated early warning, also can be realized fault fast positioning, to realizing device predicted property maintenance, reduce security of operation risk, ensureing that the reliable operation of steam turbine is significant.
Accompanying drawing explanation
Fig. 1 is turbine admission valve quick closing valve process monitoring device of the present utility model.
Fig. 2 is trip circuit schematic diagram.
Fig. 3 is valve quick closing valve curve synoptic diagram of the present utility model.
In Fig. 3,
t 0for the trip signal action moment,
t 1for valve starts action constantly,
t 2for being less than, valve opening sets aperture constantly,
t 3for 30s after trip signal action, constantly, 1 is trip signal, and 2 is valve opening.
Embodiment
From the embodiment shown in Fig. 1-3, it comprises that the 1st the 1st to the m adjusting porthole displacement transducer to n main inlet throttle-stop valve displacement transducer, measurement Steam Turhine Adjustment porthole aperture of MEASUREMENT OF STEAM turbine main steam valve is, measure the first pressure transducer of oil engine oil pressure, measure the second pressure transducer of AST oil pressure, measure trip circuit, high-speed data acquiring device and the computer of trip signal; Described n is more than or equal to 2 integers that are less than 12; Described m is more than or equal to 2 integers that are less than 12;
The described the 1st is arranged on steam turbine main inlet throttle-stop valve door bar to n main inlet throttle-stop valve displacement transducer; The described the 1st to m regulates porthole displacement transducer to be arranged on Steam Turhine Adjustment porthole door bar;
Described the first pressure transducer is arranged on admission valve oil engine; Described the second pressure transducer is arranged on AST oil pipe line; The relay normally open contact J-1 two ends of the input termination emergency trip system ETS of described trip circuit;
The described the 1st output terminal to n main inlet throttle-stop valve displacement transducer, the 1st to m adjusting porthole displacement transducer, the first pressure transducer, the second pressure transducer and trip circuit connects respectively the respective input of described high-speed data acquiring device; The output terminal of described high-speed data acquiring device is connected with computer by USB port.
Described trip circuit comprises relay J 1; The coil of described relay J 1 connect with the relay normally open contact J-1 of emergency trip system ETS after between the positive pole and negative pole of be connected on+24V DC electrical source, the normally-closed contact J1-1 two ends O1 of described relay J 1 and O2 connect respectively the corresponding trip signal input end of described high-speed data acquiring device.
From the embodiment shown in Fig. 1-3, it comprises that the 1st the 1st to the m adjusting porthole displacement transducer to n main inlet throttle-stop valve displacement transducer, measurement Steam Turhine Adjustment porthole aperture of MEASUREMENT OF STEAM turbine main steam valve is, measure the first pressure transducer of oil engine oil pressure, measure the second pressure transducer of AST oil pressure, measure trip circuit, high-speed data acquiring device and the computer of trip signal; Described n is more than or equal to 2 integers that are less than 12; Described m is more than or equal to 2 integers that are less than 12;
The described the 1st is arranged on steam turbine main inlet throttle-stop valve door bar to n main inlet throttle-stop valve displacement transducer; The described the 1st to m regulates porthole displacement transducer to be arranged on Steam Turhine Adjustment porthole door bar;
Described the first pressure transducer is arranged on admission valve oil engine; Described the second pressure transducer is arranged on AST oil pipe line; The relay normally open contact J-1 two ends of the input termination emergency trip system ETS of described trip circuit;
The output terminal of described displacement transducer, the first pressure transducer, the second pressure transducer and trip circuit connects respectively the respective input of described high-speed data acquiring device; The output terminal of described high-speed data acquiring device is connected with computer by USB port.
Described trip circuit comprises relay J 1; The coil of described relay J 1 connect with the relay normally open contact J-1 of emergency trip system ETS after between the positive pole and negative pole of be connected on+24V DC electrical source, the normally-closed contact J1-1 two ends O1 of described relay J 1 and O2 connect respectively the corresponding trip signal input end of described high-speed data acquiring device.
The working procedure of the present embodiment is as follows:
(1) by the of the present utility model the 1st, be arranged on steam turbine main inlet throttle-stop valve door bar to n main inlet throttle-stop valve displacement transducer; The described the of the present utility model the 1st to m regulates porthole displacement transducer to be arranged on Steam Turhine Adjustment porthole door bar;
The first pressure transducer of the present utility model is arranged on admission valve oil engine; The second pressure transducer of the present utility model is arranged on AST oil pipe line; The relay normally open contact J-1 two ends of the input termination emergency trip system ETS of the utility model trip circuit;
(2) described high-speed data acquiring device is carried out to initialization, wait for triggering collection;
Described triggering start and stop acquisition condition is designed to: setting trip signal is switching value, it changes the trigger condition as data capture by being disconnected to closed step, setting all valve openings is less than and sets aperture or trip signal by the moment of 30s after being disconnected to closed step and changing termination condition as data capture, when to be valve opening set aperture as being less than, if valve is closed, end data collection, if valve closing is slow or while there is bite fault valve opening be greater than setting aperture always, gather the data of 30s after tripping operation; Gather the valve opening information, oil engine oil pressure information, AST oil pressure information, trip signal information of normal quick closing valve process under valve different opening as the normal state information of valve quick closing valve process; The valve quick closing's time of setting normal quick closing valve process is time threshold values;
(3) gather the valve opening information, oil engine oil pressure information, AST oil pressure information, trip signal information of normal quick closing valve process under the corresponding aperture of valve as the normal state information of valve quick closing valve process;
(4) getting trip signal is carved into valve to start the action time difference is constantly valve retard time by being disconnected to when closed step changes, trip signal changes constantly and to valve opening, to be less than that to set the aperture time difference be constantly valve quick closing's time, display delay time, quick closing's time and quick closing valve conditional curve on computer display by being disconnected to closed step; Valve quick closing's time shows " normally " as being less than set time threshold values on computer display, as be greater than set time threshold values and show " exceeding standard ", send alarm signal and start fault diagnosis module, parameter information and normal state information to monitoring compared, information convergence analysis, if tripping operation late gate retard time is abnormal or AST oil pressure information is abnormal, fault localization is in electronic circuit part; If AST oil pressure information is normal after tripping operation, oil engine oil pressure information is abnormal, and fault localization is at hydraulic part; If AST oil pressure, oil engine oil pressure information are normal after tripping operation, fault localization is at mechanical part; After completing, fault diagnosis shows trouble location and possible cause on computer display;
(5) send alarm signal after maintainer check defect elimination, the diagnostic rule of phenomenon of the failure, feature, reason is revised or is added in Fault Diagnosis Database.
Turbine admission valve comprises all main inlet throttle-stop valves, regulates porthole, described admission valve aperture is got the relative value of steam inlet valve every throw of lever, on all main inlet throttle-stop valve door bars, regulate on porthole door bar rather than on oil engine, displacement transducer be installed, measure the relative value of the valve door throw of lever as valve opening.Described pressure transducer time constant≤10ms, described tripping relay picks up the output signal of emergency trip system (ETS) system.The engineering work load that characterizes valve state is converted to the discernible analog amount of high-speed data acquiring device or switching value by sensor group.
The model that described high-speed data acquiring device adopts is NI-CompactDAQ-9229, effect is that the signal to coming from sensor unit transmission amplifies, filtering, analog-to-digital conversion process, by the sample frequency (being generally made as 1kHz) of setting, carries out high-speed signal acquisition and transfers to data handling machine by USB connecting line.
The operation of high-speed data acquiring device in described computer control, and storage and display measurement data.
The utility model has improved the metering system of existing turbine admission valve aperture and the test method of valve closing process, by comparing of monitoring parameter and normal state information, Real-Time Monitoring and the on-line fault diagnosis of steam turbine valve closing process have been realized, improved the ageing of the controllability of valve state and fault treatment, to realizing device predicted property maintenance, reduce security of operation risk, ensureing that the reliable operation of steam turbine is significant.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of making within spirit of the present utility model and principle, be equal to and replace and improvement etc., within being all included in protection domain of the present utility model.
Claims (3)
1. steam turbine main inlet throttle-stop valve and an adjusting fast-valving process monitoring device, is characterized in that: comprise that the 1st the 1st to the m adjusting porthole displacement transducer to n main inlet throttle-stop valve displacement transducer, measurement Steam Turhine Adjustment porthole aperture of MEASUREMENT OF STEAM turbine main steam valve is, trip circuit, high-speed data acquiring device and the computer of the first pressure transducer of measuring oil engine oil pressure, the second pressure transducer of measuring AST oil pressure, measurement trip signal; Described n is more than or equal to 2 integers that are less than 12; Described m is more than or equal to 2 integers that are less than 12;
The described the 1st is arranged on steam turbine main inlet throttle-stop valve door bar to n main inlet throttle-stop valve displacement transducer; The described the 1st to m regulates porthole displacement transducer to be arranged on Steam Turhine Adjustment porthole door bar;
Described the first pressure transducer is arranged on admission valve oil engine; Described the second pressure transducer is arranged on AST oil pipe line; The relay normally open contact J-1 two ends of the input termination emergency trip system ETS of described trip circuit;
The described the 1st output terminal to n main inlet throttle-stop valve displacement transducer, the 1st to m adjusting porthole displacement transducer, the first pressure transducer, the second pressure transducer and trip circuit connects respectively the respective input of described high-speed data acquiring device; The output terminal of described high-speed data acquiring device is connected with computer by USB port.
2. a kind of steam turbine main inlet throttle-stop valve according to claim 1 and adjusting fast-valving process monitoring device, is characterized in that: described trip circuit comprises relay J 1; The coil of described relay J 1 connect with the relay normally open contact J-1 of emergency trip system ETS after between the positive pole and negative pole of be connected on+24V DC electrical source, the normally-closed contact J1-1 two ends O1 of described relay J 1 and O2 connect respectively the corresponding trip signal input end of described high-speed data acquiring device.
3. a kind of steam turbine main inlet throttle-stop valve according to claim 2 and adjusting fast-valving process monitoring device, is characterized in that: the model of described displacement transducer is LVDT; The model of described the first pressure transducer is 3051CG; The model of described the second pressure transducer is 3051CG; The model of described high-speed data acquiring device is CompactDAQ-9229; Described relay model MY4J; The model of described computer is X201.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420254456.6U CN203847177U (en) | 2014-05-19 | 2014-05-19 | Fast closing process monitoring device for steam turbine main valve and adjusting valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420254456.6U CN203847177U (en) | 2014-05-19 | 2014-05-19 | Fast closing process monitoring device for steam turbine main valve and adjusting valve |
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| CN203847177U true CN203847177U (en) | 2014-09-24 |
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| CN201420254456.6U Expired - Fee Related CN203847177U (en) | 2014-05-19 | 2014-05-19 | Fast closing process monitoring device for steam turbine main valve and adjusting valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953399A (en) * | 2014-05-19 | 2014-07-30 | 国家电网公司 | Monitoring device and online monitoring method of quick closing process of steam turbine inlet valve |
| CN107560867A (en) * | 2017-10-13 | 2018-01-09 | 上海华电电力发展有限公司 | Small turbine low pressure main inlet throttle-stop valve stroke experiment control system |
| CN109404065A (en) * | 2018-10-12 | 2019-03-01 | 上海华电电力发展有限公司 | Prevent host porthole blocking solenoid valve failure from causing the control method of unit tripping |
-
2014
- 2014-05-19 CN CN201420254456.6U patent/CN203847177U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953399A (en) * | 2014-05-19 | 2014-07-30 | 国家电网公司 | Monitoring device and online monitoring method of quick closing process of steam turbine inlet valve |
| CN103953399B (en) * | 2014-05-19 | 2016-10-26 | 国家电网公司 | A kind of turbine admission valve quick closing valve process monitoring equipment and on-line monitoring method |
| CN107560867A (en) * | 2017-10-13 | 2018-01-09 | 上海华电电力发展有限公司 | Small turbine low pressure main inlet throttle-stop valve stroke experiment control system |
| CN107560867B (en) * | 2017-10-13 | 2020-08-07 | 上海华电电力发展有限公司 | Small steam turbine low-pressure main valve stroke test control system |
| CN109404065A (en) * | 2018-10-12 | 2019-03-01 | 上海华电电力发展有限公司 | Prevent host porthole blocking solenoid valve failure from causing the control method of unit tripping |
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Granted publication date: 20140924 Termination date: 20160519 |
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