CN207300509U - Multi-parameter combined type high-pressure heater leakage monitoring system - Google Patents
Multi-parameter combined type high-pressure heater leakage monitoring system Download PDFInfo
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- CN207300509U CN207300509U CN201720791094.8U CN201720791094U CN207300509U CN 207300509 U CN207300509 U CN 207300509U CN 201720791094 U CN201720791094 U CN 201720791094U CN 207300509 U CN207300509 U CN 207300509U
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Abstract
In order to improve the promptness and accuracy of existing high-pressure heater leakage early warning, a kind of multi-parameter combined type high-pressure heater leakage monitoring system for considering leakage noise signal, hydrophobic water level, upper end difference and feedwater flow is proposed.The system includes waveguide rod, acoustic emission sensor, signal amplification unit, on the spot signal processing unit, KVM expanders and remote transfer signal display unit, the acoustic emission sensor is used for gathering acoustic emission signal when internal leakage occurs for high-pressure heater, and converts the signal into after electric signal and send signal processing unit on the spot to through signal amplification unit.With reference to upper end difference data, hydrophobic water level and the feedwater flow data that high-pressure heater is obtained from distributed monitoring control system database, handled into signal processing unit on the spot.The signal handled is given remote transfer signal by remote transmission device and is shown, for leakage alarm.
Description
Technical field
It the utility model is related to a kind of high-pressure bottle leakage monitoring system, and in particular to one kind is used for high-pressure power plant heater
Multi-parameter leakage monitoring system, belongs to Nondestructive Testing Techniques for Pressure Vessels field.
Background technology
In Reheating System in Thermal Power Plant, high-pressure heater internal leakage is to cause one of major failure of accidental shutdown.Such as
Fruit can carry out leakage early stage on-line monitoring and diagnosis, judge high plus pipe leakage in time, and leakage development trend be carried out visual
The Quantitative Monitoring of change, Ze Nengshi power plant carry out repairing and prepare in advance, effectively prevent the expansion of accident, reduce unnecessary economic damage
Lose.But operated in due to high-pressure heater in the environment of high temperature and pressure, the requirement to detection technique is very high.
At present, change of the power plant operations staff generally according to hydrophobic water level, upper end difference and feedwater flow carrys out preliminary judgement and is
No that high plus leakage phenomenon occurs, this Capability Requirement to operating person is higher, for this reason, patent announcement number is public for CN 103776652A
A kind of high-pressure heater method for testing performance and system are opened, this method can be used for the solution prior art to pass through first by hyperbaric heating
The problem of device off-the-line is reexamined to judge high-pressure heater performance after splitting, but the real-time display performance of the patent is bad.With
Scientific and technological progress, acoustic emission are applied in high-pressure heater leak detection technology, such as Publication No. CN 101750193A
A kind of high-pressure heater internal leakage fault based on acoustic emission detection is individually disclosed with Publication No. CN 203375178U to examine
Disconnected device and a kind of pipeline network of fuel gas in city leakage wireless monitor system based on sound emission, the selection of alarm threshold value in above invention
Directly determine the accuracy of monitoring, but since the alarm threshold value of the technology comes from spot sampling mostly, if false alarm occurs
Serious economic loss can be caused to power plant.Therefore, it is necessary to live other parameters are combined to improve the accuracy of monitoring system.
The content of the invention
The object of the present invention is to provide a kind of sound emission for considering the thermal parameters such as hydrophobic water level, upper end difference and feedwater flow
Device, is monitored for the leakage situation to high-pressure power plant heater.To solve existing operation mesohigh heater leakage thing
Therefore when occurring, the error that artificially judges；Meanwhile multi-parameter revised law is employed, it ensure that acoustic emission device to accident forecast
Accuracy.
The present invention adopts the technical scheme that to solve above-mentioned technical problem：One kind is used for high-pressure power plant heater multi-parameter
Leakage monitoring system, it is characterised in that:Including waveguide rod, acoustic emission sensor, on the spot signal amplification unit, signal processing list
Member, KVM expanders and remote transfer signal display unit, the acoustic emission sensor are used for gathering high-pressure heater generation internal leakage
When acoustic emission signal, and convert the signal into after electric signal and send signal processing unit on the spot to through signal amplification unit,
The signal handled is given remote transfer signal by remote transmission device and is shown, for leakage alarm.
In the signal processing unit on the spot, high-pressure heater is obtained from distributed monitoring control system database
Upper end difference data, hydrophobic water level and feedwater flow data, are combined with sound emission measurement data and are jointly processed by.Signal is through adopting
Sample, processing after, it can be achieved that detecting system on the spot and distant place presentation control function, for reduce field wiring, reduce signal transmission
Loss, it is recommended to use distant place display control mode.
Since high-pressure heater skin temperature is high, and there is thicker insulating layer in outside, and the acoustic emission sensor need to pass through
Waveguide rod is fixed on high-pressure heater shell.Due to acoustic emission signal category small-signal, it requires that waveguide rod pad is use up
It may add close to high, and amplifier is installed after sensor in 0.5m, amplifier includes signal amplification, filter function.
The remote transfer signal display unit and signal processing unit on the spot, connect KVM expanders, in master control by cable
The equipment such as room installation display, keyboard, mouse, realize that remote monitoring is shown.
Compared with prior art, it is that the advantages of the utility model:
1st, present invention only requires acoustic emission sensor is fixed on high-pressure heater shell, you can accurate to find that early stage lets out
Leak and Quantitative Monitoring can be carried out to leakage development trend；
2nd, using thermal parameters such as hydrophobic water level, upper end difference and feedwater flows, it is combined with sound emission noise signal, can be real
Existing multiple qualitative and quantitative detection, ensures that leak detection result is accurate；
3rd, the setting of remote alarms server is, it can be achieved that remote alarms, even if power plant, nobody can also allow employee long-range in time
Learn leakage failure；
4th, operation conditions real-time display can be carried out to high-pressure heater, it is ensured that find leakage point in time, shorten power plant's maintenance
Time.
Brief description of the drawings
Fig. 1 is the measuring device catenation principle block diagram of the present invention；
Fig. 2 is structure diagram of the present invention in instantiation.
Marginal data
1st, distributed monitoring control system；2nd, signal amplification unit；3rd, signal processing unit on the spot；4th, KVM expanders；5th, it is remote
Pass signal display unit；6th, waveguide rod；7th, acoustic emission sensor；8th, No. three high-pressure heaters；9th, No. two high-pressure heaters；10、
No.1 high-pressure heater.
Embodiment
The present invention is further described with reference to instantiation.
As shown in Fig. 1~Fig. 2, multi-parameter combined type high-pressure heater leakage monitoring system includes：Respectively with No.1 high pressure
The six roots of sensation waveguide rod 6 that 10, No. two high-pressure heaters 9 of heater are connected with No. three high-pressure heaters 8, the top of the waveguide rod 6
End is connected with acoustic emission sensor 7 respectively, and 7 output terminal of acoustic emission sensor is connected with the input terminal of signal amplification unit 2, described
The output terminal of signal amplification unit 2 is connected with the input terminal of signal processing unit 3 on the spot, 10, No. two height of No.1 high-pressure heater
The operating parameter of the hydrophobic water level of pressure heater 9 and No. three high-pressure heaters 8, upper end difference and feedwater flow is pooled to decentralised control
In system DCS 1, the output terminal of the distributed monitoring control system 1 is also connected with signal processing unit 3 on the spot, it is described on the spot
The output terminal of signal processing unit 3 is connected with the input terminal of KVM expanders 4, the output terminal of the KVM expanders 4 and teletransmission
Signal display unit 5 is connected.
The acoustic emission sensor 7, signal amplification unit 2 and it is connected on the spot by cable between signal processing unit 3,
Be connected between the distributed monitoring control system 1 and signal processing unit 3 on the spot by RS-485 buses, and it is described on the spot
Then it is connected between signal processing unit 3, KVM expanders 4 and remote transfer signal display unit 5 by cable.The cable is more
Thermal technology's shielded cable of core.
Work since high-pressure heater is mostly in hot environment, 10, No. two high pressures of No.1 high-pressure heater add
About 300~400 DEG C or so of the temperature of hot device 9 and No. three high-pressure heaters 8, using the present invention in order to avoid acoustic emission sensor
7 are damaged, and are mounted with waveguide rod 6, and the length of waveguide rod 6 is about 800mm, in order to improve sampling accuracy, each hyperbaric heating
Two acoustic emission sensors 7 are arranged on device, two acoustic emission sensors 7 are on sustained height, the work of acoustic emission sensor 7
Frequency is 50-200kHz.
Operation principle:High-pressure heater generally can be divided into steam side and water side.Water lateral pressure much steam lateral pressures, work as water
When side pipe wall leaks, the noise signal of high frequency is formed, and this high-frequency signal is slower in intrametallic decay, passes through waveguide rod first
6 are fixed on acoustic emission sensor 7 on high-pressure heater shell, and acoustic emission sensor 7 is single by the amplification of respective signal respectively
Member 2 enters signal processing unit 3 on the spot；When high-pressure heater leaks, hydrophobic water level rise in high-pressure heater, and
And end is poor apparently higher than normal value, further, since hydrophobic gravity flow step by step enters oxygen-eliminating device so that feedwater flow also increases, the above
Three thermal parameters can be obtained from distributed monitoring control system 1, enter signal processing unit 3 on the spot at the same time with acoustic emission signal
Interior, the on-line checking software by prepackage is calculated, and calculating knot is carried out in remote transfer signal display unit 5 by KVM expanders 4
Fruit shows.
Described above is only the basic embodiment of invention, it should be pointed out that：Within the spirit and principles of the invention, no
On the premise of departing from the principle of the invention, some improvements and modifications for making also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of multi-parameter combined type high-pressure heater leakage monitoring system, the monitoring system include waveguide rod（6）, sound hair
Penetrate sensor（7）, signal amplification unit（2）, signal processing unit on the spot（3）, KVM expanders（4）Shown with remote transfer signal single
Member（5）；It is characterized in that：Respectively with No.1 high-pressure heater（10）, No. two high-pressure heaters（9）With No. three high-pressure heaters
（8）Connected six roots of sensation waveguide rod（6）, the waveguide rod（6）Top respectively with acoustic emission sensor（7）It is connected, sound emission
Sensor（7）Output terminal and signal amplification unit（2）Input terminal be connected, the signal amplification unit（2）Output terminal with just
Earth signal processing unit（3）Input terminal be connected, No.1 high-pressure heater（10）, No. two high-pressure heaters（9）With No. three high pressures
Heater（8）Hydrophobic water level, upper end difference and the real time data of feedwater flow be pooled to distributed monitoring control system（1）In, it is described
Distributed monitoring control system（1）Output terminal also with signal processing unit on the spot（3）It is connected, the signal processing unit on the spot
（3）Output terminal and KVM expanders（4）Input terminal be connected, the KVM expanders（4）Output terminal shown with remote transfer signal
Show unit（5）It is connected.
A kind of 2. multi-parameter combined type high-pressure heater leakage monitoring system according to claim 1, it is characterised in that：Institute
The signal processing unit on the spot stated（3）Signal respectively from signal amplification unit（2）Output terminal and distributed monitoring control system
（1）Output terminal.
A kind of 3. multi-parameter combined type high-pressure heater leakage monitoring system according to claim 1, it is characterised in that：Institute
The acoustic emission sensor stated（7）, signal amplification unit（2）Signal processing unit on the spot（3）Between be connected by cable, it is described
Distributed monitoring control system（1）With signal processing unit on the spot（3）Between be connected by RS-485 buses, and it is described on the spot
Signal processing unit（3）, KVM expanders（4）With remote transfer signal display unit（5）Between be then connected by cable.
4. a kind of multi-parameter combined type high-pressure heater leakage monitoring system according to claim 1,2 or 3, its feature exist
In：Remote transfer signal display unit（5）With signal processing unit on the spot（3）, KVM expanders are connected by cable（4）, in master control room
Display, keyboard, mouse are installed, realize that remote monitoring is shown.
5. a kind of multi-parameter combined type high-pressure heater leakage monitoring system according to claim 1 or 2, its feature exist
In：Signal processing unit on the spot（3）In, from distributed monitoring control system（1）The upper end difference of high-pressure heater is obtained in database
According to, hydrophobic water level and feedwater flow data, with acoustic emission sensor（7）Measurement data is combined and is jointly processed by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720791094.8U CN207300509U (en) | 2017-07-03 | 2017-07-03 | Multi-parameter combined type high-pressure heater leakage monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720791094.8U CN207300509U (en) | 2017-07-03 | 2017-07-03 | Multi-parameter combined type high-pressure heater leakage monitoring system |
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| Publication Number | Publication Date |
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| CN207300509U true CN207300509U (en) | 2018-05-01 |
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| CN201720791094.8U Expired - Fee Related CN207300509U (en) | 2017-07-03 | 2017-07-03 | Multi-parameter combined type high-pressure heater leakage monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923287A (en) * | 2022-04-14 | 2022-08-19 | 西安热工研究院有限公司 | High-pressure heater fault early warning method, system and medium |
-
2017
- 2017-07-03 CN CN201720791094.8U patent/CN207300509U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923287A (en) * | 2022-04-14 | 2022-08-19 | 西安热工研究院有限公司 | High-pressure heater fault early warning method, system and medium |
| CN114923287B (en) * | 2022-04-14 | 2023-10-13 | 西安热工研究院有限公司 | High-voltage heater fault early warning method, system and medium |
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Granted publication date: 20180501 Termination date: 20200703 |