CN110470254A - A kind of pipeline creep measurement system and method - Google Patents
A kind of pipeline creep measurement system and method Download PDFInfo
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- CN110470254A CN110470254A CN201910920160.0A CN201910920160A CN110470254A CN 110470254 A CN110470254 A CN 110470254A CN 201910920160 A CN201910920160 A CN 201910920160A CN 110470254 A CN110470254 A CN 110470254A
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- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims description 28
- 238000000691 measurement method Methods 0.000 claims description 9
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
Abstract
The invention discloses a kind of pipeline creep measurement system and method, including pipe under test, ultrasonic module, thermal module, host computer, the first ultrasonic transducer for generating ultrasonic signal, for the ultrasonic signal received to be converted to the second ultrasonic transducer of electric signal and is used to detect the temperature sensor of pipe under test tube wall temperature；Host computer is connected with ultrasonic module and thermal module, the output end of ultrasonic module is connected with the first ultrasonic transducer, second ultrasonic transducer is connected with the input terminal of ultrasonic module, temperature sensor is connected with the input terminal of thermal module, the ultrasonic wave that first ultrasonic transducer issues is traveled to after a perimeter surface of pipe under test in the second ultrasonic transducer, the system and method can measure the creep of pipeline, and have easy to operate, the feature that testing result is accurate and human error is small, influence of the temperature change to creep measurement result can utmostly be avoided.
Description
Technical field
The present invention relates to a kind of digital measuring system and methods, and in particular to a kind of pipeline creep measurement system and method.
Background technique
Station boiler jet chimney longtime running high temperature, high pressure operating condition under, will cause high-temperature creep injury, damage
Wound accumulation and Stress superposition will lead to jet chimney leakage or explosion to a certain extent, seriously threaten the safe operation in power station.It is logical
It crosses to the regular creep measurement of pipeline and data analysis, the Creep Rule of timely grasp jet chimney metal is Correct Analysis and pre-
The remaining life in test tube road provides reliable technical basis.
Currently, common jet chimney creep measurement method is broadly divided into two kinds, the first is creep measurement points measurement method,
With the method for miking supervision diameter of section when shutting down, second is creep measurement label measurement method, that is, uses invar
The steel hand tape of alloy production is wrapped on the outer surface of duct survey section the method for measuring the perimeter of section, and both of which is
It is directly measured using dimensional measuring instrument.Creep measurement points measurement method has following limitation: 1) two measuring points in diametrical direction
It is difficult centering in erecting and welding, furthermore measuring point is easy to fall off after being used for a long time, it falls off once measuring point occurs, whole group measuring point and before this
Measurement data will lose meaning；2) the micrometer weight that uses of measurement is big, volume is big, inconvenient, and when measurement needs more people
It works at the same time；3) measurement result is influenced by environmental temperature, measures precision to improve, when measurement need to surveyed micrometer
At least 0.5 hour is stood by pipeline；4) pipeline creep direction is not balanced, and possible creep maximum direction is not in measuring point position
It sets, causes false survey phenomenon.Creep measurement label measurement method there is also similar limitations: 1) steel hand tape that measurement uses compared with
Greatly, more people's cooperatings are needed, it is inconvenient；2) environment temperature is affected to measurement result, and steel hand tape temperature should be with environment
Temperature is consistent；3) different survey crews can generate human error in measurement process.Since pipeline deformation of creep amount is very small, two
The accuracy of kind of measurement method is all difficult to meet the requirements, and frequently results in measurement data without regularity, in addition after occurring it is primary
The case where pipe diameter or perimeter measurement are less than a preceding measured value, creep supervision is made to lose meaning.Therefore, DL/T 438-
2016 " thermal power plant alloying technology supervises regulation " eliminate the mandatory requirement to creep measurement, have used the industry of many decades
Standard DL/T 441 " thermal power plant high temperature and high pressure steam pipeline creep supervision regulation " loses the original intention of its formulation.
In view of the limitation of existing measurement means, need to develop a kind of convenience, accurate pipeline creep measurement system and side
Method, this will provide strong technical support to the security state evaluation of high-temperature pipe.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of pipeline creep measurement system and side are devised
Method, the system and method can measure the creep of pipeline, and have easy to operate, testing result accurately and human error
Small feature can utmostly avoid influence of the temperature change to creep measurement result.
In order to achieve the above objectives, pipeline creep measurement system of the present invention includes pipe under test, ultrasonic module, temperature
Module, host computer, the first ultrasonic transducer for generating ultrasonic signal, for by the ultrasonic signal received convert
Temperature sensor for the second ultrasonic transducer of electric signal and for detecting pipe under test tube wall temperature；
Host computer is connected with ultrasonic module and thermal module, the output end of ultrasonic module and the first ultrasonic transducer phase
Connection, the second ultrasonic transducer are connected with the input terminal of ultrasonic module, the input terminal phase of temperature sensor and thermal module
Connection, the ultrasonic wave that the first ultrasonic transducer issues travel to the second ultrasonic transducer after a perimeter surface of pipe under test
In.
Host computer includes processor and the memory and display that are connected with processor, wherein processor and ultrasound
Module and thermal module are connected.
First ultrasonic transducer and the second ultrasonic transducer are connected by shielded cable with ultrasonic module.
Pipeline creep measurement method of the present invention comprises the steps of:
1) line of the material trademark, pipe under test material of pipe under test in different temperatures is inputted into host computer expands system
Number δT, pipe under test material ultrasonic wave in different temperatures velocity of sound μTAnd first ultrasonic transducer and the second ultrasonic waves
The distance between energy device LS；
2) thermal module passes through the temperature information T of temperature sensor measurement pipe under test tube wallx, and will test to
Survey the temperature information T of pipe wallxIt is sent to host computer；
3) host computer is according to the temperature information T of pipe under test tube wallxPipe under test material is calculated by the method for linear interpolation
The linear expansion coefficient δ of materialTx；
4) host computer is according to the temperature information T of pipe under test tube wallxPipe under test material is calculated by the method for linear interpolation
Ultrasonic velocity μ in materialTx；
5) PC control ultrasonic module generates the first electric signal, and first electric signal is sent to the first ultrasonic wave
In energy converter, first electric signal is converted to ultrasonic signal by the first ultrasonic transducer, the ultrasonic signal pass through to
It is entered in the second ultrasonic transducer after one perimeter surface in test tube road, and the second electricity is converted to by the second ultrasonic transducer
Ultrasonic module is sent to after signal, host computer records the time t that the first ultrasonic transducer issues ultrasonic wave1With the second ultrasonic wave
The time t of energy converter reception ultrasonic wave2；
6) it is T that host computer, which calculates pipe under test tube wall temperature,xWhen pipe under test section original circumference C=μTx*(t2-t1)+
LS；
7) host computer calculates section original circumference C when pipe under test tube wall temperature is converted to 0 DEG C0=C* (1-Tx*δTx)
=[μTx*(t2-t1)+LS]*(1-Tx*δTx)；
8) pipe under test is after the hot operation W time, the tube wall temperature T ' of temperature sensor measurement pipe under testx, then
Calculating pipe under test material in temperature by linear interpolation method is T 'xWhen linear expansion coefficient δ 'TxAnd ultrasonic velocity μ 'Tx, together
When host computer record the first ultrasonic transducer issue ultrasonic wave time t '1And second ultrasonic transducer receive ultrasonic wave
Time t '2, perimeter C ' after section when pipe under test tube wall temperature is converted to 0 DEG C is run is calculated0Are as follows:
9) host computer calculates and exports the opposite creep compliance after the pipe under test hot operation W time
The invention has the following advantages:
Pipeline creep measurement system and method for the present invention utilizes ultrasonic distance measurement principle, control when specific operation
Ultrasonic signal processed is propagated one week along pipeline peripheral surface, using sending ultrasonic signal and is received between ultrasonic signal
Time difference calculates the current perimeter of pipeline, in combination with the current calculation of Wall Temperature pipeline creep compliance of pipeline, it should be noted that this hair
The bright ultrasonic velocity by under different temperatures, linear expansion coefficient are introduced into creep calculating, avoid temperature to the greatest extent
Change the influence to creep measurement result, easy to operate, measurement result is accurate, and manual operation error is small.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Wherein, 1 be pipe under test, 2 be the first ultrasonic transducer, 3 be the second ultrasonic transducer, 4 be ultrasonic module,
5 it is temperature sensor, 6 be thermal module, 7 is host computer.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing, it is worth noting that, structural schematic diagram shown in Fig. 1,
Only the parts related to the present invention are shown, it will be understood by those skilled in the art that structure shown in figure is not constituted to being
The restriction of system may include perhaps combining certain components or different component layouts than illustrating more or fewer components.
With reference to Fig. 1, pipeline creep measurement system of the present invention includes pipe under test 1, ultrasonic module 4, thermal module
6, host computer 7, the first ultrasonic transducer 2 for generating ultrasonic signal, for by the ultrasonic signal received convert
Temperature sensor 5 for the second ultrasonic transducer 3 of electric signal and for detecting 1 tube wall temperature of pipe under test；Host computer 7
It is connected with ultrasonic module 4 and thermal module 6, the output end of ultrasonic module 4 is connected with the first ultrasonic transducer 2, and second
Ultrasonic transducer 3 is connected with the input terminal of ultrasonic module 4, and temperature sensor 5 is connected with the input terminal of thermal module 6,
The ultrasonic wave that first ultrasonic transducer 2 issues travels to the second ultrasonic transducer 3 after a perimeter surface of pipe under test 1
In.
Host computer 7 includes processor and the memory and display that are connected with processor, wherein processor and ultrasound
Module 4 and thermal module 6 are connected；First ultrasonic transducer 2 and the second ultrasonic transducer 3 pass through shielded cable and ultrasound
Module 4 is connected.
Pipeline creep measurement method of the present invention comprises the steps of:
1) it is swollen that the line of the material trademark, 1 material of pipe under test of pipe under test 1 in different temperatures is inputted into host computer 7
Swollen coefficient δT, 1 material of pipe under test ultrasonic wave in different temperatures velocity of sound μTAnd first ultrasonic transducer 2 with the second surpass
The distance between acoustic wave transducer 3 LS；
2) thermal module 6 measures the temperature information T on 1 tube wall of pipe under test by temperature sensor 5x, and will test
The temperature information T of 1 tube wall of pipe under test arrivedxIt is sent to host computer 7；
3) host computer 7 is according to the temperature information T of 1 tube wall of pipe under testxPipe under test 1 is calculated by the method for linear interpolation
The linear expansion coefficient δ of materialTx；
Wherein, which is generally discrete enumeration type data, i.e., only specific temperature parameter T1、T2、T3…Tn
The linear expansion coefficient δ of lower materialT1、δT2、δT3……δTn；
Assuming that T1、T2、T3…Tn、Tn+1... for the temperature containing corresponding linear expansion coefficient being input in host computer 7
Parameter, and T1< T2< T3< ... < Tn< Tn+1< ..., if the wall temperature T of pipe under test 1xJust between TnAnd Tn+1Between, i.e. Tn
≤Tx< Tn+1, temperature TnWhen material linear expansion coefficient be δTn, temperature Tn+1When material linear expansion coefficient be δTn+1, then
Temperature is TxWhen material linear expansion coefficient
When the linear expansion coefficient for needing higher precision, other interpolation methods can be selected, such as Newton interpolating method, Lagrange's interpolation
Method, Hermite's interpolation method etc..
4) host computer 7 is according to the temperature information T of 1 tube wall of pipe under testxPipe under test 1 is calculated by the method for linear interpolation
Ultrasonic velocity μ in materialTx；
Wherein, which is generally discrete enumeration type data, i.e., only specific temperature parameter T1、T2、T3…Tn
Ultrasonic propagation velocity μ in lower materialT1、μT2、μT3……μTn；
Specifically, assuming T1、T2、T3…Tn、Tn+1... contain corresponding ultrasonic velocity to be input in host computer 7
Temperature parameter, and T1< T2< T3< ... < Tn< Tn+1< ..., if 1 wall temperature T of pipe under testxJust between TnAnd Tn+1Between,
That is Tn≤Tx< Tn+1, temperature TnWhen material in ultrasonic velocity be μTn, temperature Tn+1When material in ultrasonic velocity be
μTn+1, then temperature is TxWhen material in ultrasonic velocity
5) host computer 7 controls ultrasonic module 4 and generates the first electric signal, and first electric signal is sent to the first ultrasound
In wave transducer 2, first electric signal is converted to ultrasonic signal, the ultrasonic signal by the first ultrasonic transducer 2
It enters after a perimeter surface of pipe under test 1 in second ultrasonic transducer 3, and is converted by the second ultrasonic transducer 3
To be sent to ultrasonic module 4 after the second electric signal, host computer 7 records the time t that the first ultrasonic transducer 2 issues ultrasonic wave1
The time t of ultrasonic wave is received with the second ultrasonic transducer 32；
6) it is T that host computer 7, which calculates 1 tube wall temperature of pipe under test,xWhen 1 section original circumference C=μ of pipe under testTx*(t2-
t1)+LS；
7) host computer 7 calculates section original circumference C when 1 tube wall temperature of pipe under test is converted to 0 DEG C0=C* (1-Tx*
δTx)=[μTx*(t2-t1)+LS]*(1-Tx*δTx)；
8) for pipe under test 1 after the hot operation W time, temperature sensor 5 measures the tube wall temperature of obtained pipe under test 1
Degree is T 'x, calculating 1 material of pipe under test in temperature by linear interpolation method is T 'xWhen linear expansion coefficient δ 'TxAnd ultrasonic acoustic
Fast μ 'Tx, while host computer 7 records the time t ' that the first ultrasonic transducer 2 issues ultrasonic wave1And second ultrasonic transducer 3
Receive the time t ' of ultrasonic wave2, calculate perimeter after 1 section of pipe under test when 1 tube wall temperature of pipe under test is converted to 0 DEG C is run
C′0Are as follows:
C′0=[μ 'Tx*(t′2-t′1)+LS]*(1-T′x*δ′Tx)
9) host computer 7 calculates and exports the opposite creep compliance after the 1 hot operation W time of pipe under test
Claims (4)
1. a kind of pipeline creep measurement system, which is characterized in that including pipe under test (1), ultrasonic module (4), thermal module
(6), host computer (7), the first ultrasonic transducer (2) for generating ultrasonic signal, for by the ultrasonic wave received believe
Number be converted to the second ultrasonic transducer (3) of electric signal and the temperature sensing for detecting pipe under test (1) tube wall temperature
Device (5)；
Host computer (7) is connected with ultrasonic module (4) and thermal module (6), the output end and the first ultrasonic wave of ultrasonic module (4)
Energy converter (2) is connected, and the second ultrasonic transducer (3) is connected with the input terminal of ultrasonic module (4), temperature sensor (5)
Be connected with the input terminal of thermal module (6), the first ultrasonic transducer (2) issue ultrasonic wave through pipe under test (1) one
It is traveled to after perimeter surface in the second ultrasonic transducer (3).
2. pipeline creep measurement system according to claim 1, which is characterized in that host computer (7) include processor and
The memory and display being connected with processor, wherein processor is connected with ultrasonic module (4) and thermal module (6).
3. pipeline creep measurement system according to claim 1, which is characterized in that the first ultrasonic transducer (2) and
Two ultrasonic transducers (3) are connected by shielded cable with ultrasonic module (4).
4. a kind of pipeline creep measurement method, which is characterized in that be based on pipeline creep measurement system described in claim 1, packet
Containing following steps:
1) line of the material trademark, pipe under test (1) material of input pipe under test (1) in different temperatures into host computer (7)
Coefficient of expansion δT, pipe under test (1) material ultrasonic wave in different temperatures velocity of sound μTAnd first ultrasonic transducer (2) with
The distance between second ultrasonic transducer (3) LS；
2) thermal module (6) measures the temperature information T of pipe under test (1) tube wall by temperature sensor (5)x, and will test to obtain
Pipe under test (1) tube wall temperature information TxIt is sent to host computer (7)；
3) host computer (7) is according to the temperature information T of pipe under test (1) tube wallxPipe under test is calculated by the method for linear interpolation
(1) the linear expansion coefficient δ of materialTx；
4) host computer (7) is according to the temperature information T of pipe under test (1) tube wallxPipe under test is calculated by the method for linear interpolation
(1) the ultrasonic velocity μ in materialTx；
5) host computer (7) control ultrasonic module (4) generates the first electric signal, and first electric signal is sent to the first ultrasound
In wave transducer (2), first electric signal is converted to ultrasonic signal, the ultrasonic wave by the first ultrasonic transducer (2)
Signal is entered after a perimeter surface of pipe under test (1) in the second ultrasonic transducer (3), and passes through the second ultrasonic wave transducer
Device (3) is sent to ultrasonic module (4) after being converted to the second electric signal, and host computer (7) records the first ultrasonic transducer (2) and issues
The time t of ultrasonic wave1The time t of ultrasonic wave is received with the second ultrasonic transducer (3)2；
6) it is T that host computer (7), which calculates pipe under test (1) tube wall temperature,xWhen pipe under test (1) section original circumference C=μTx*
(t2-t1)+LS；
7) host computer (7) calculates section original circumference C when pipe under test (1) tube wall temperature is converted to 0 DEG C0=C* (1-Tx*δTx)
=[μTx*(t2-t1)+LS]*(1-Tx*δTx)；
8) for pipe under test (1) after the hot operation W time, temperature sensor (5) measures the tube wall temperature T of pipe under test (1)
′x, then calculating pipe under test (1) material in temperature by linear interpolation method is T 'xWhen linear expansion coefficient δ 'TxAnd ultrasonic acoustic
Fast μ 'Tx, while host computer (7) record the first ultrasonic transducer (2) issues the time t ' of ultrasonic wave1And second ultrasonic wave transducer
The time t ' of device (3) reception ultrasonic wave2, section operation Later Zhou Dynasty, one of the Five Dynasties when pipe under test (1) tube wall temperature is converted to 0 DEG C is calculated
Long C '0Are as follows:
C′0=[μ 'Tx*(t′2-t′1)+LS]*(1-T′x*δ′Tx)；
9) host computer (7) calculates and exports the opposite creep compliance after pipe under test (1) hot operation W time
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920160.0A CN110470254A (en) | 2019-09-26 | 2019-09-26 | A kind of pipeline creep measurement system and method |
| PCT/CN2020/108099 WO2021057288A1 (en) | 2019-09-26 | 2020-08-10 | Pipe creep measurement system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910920160.0A CN110470254A (en) | 2019-09-26 | 2019-09-26 | A kind of pipeline creep measurement system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021057288A1 (en) * | 2019-09-26 | 2021-04-01 | 西安热工研究院有限公司 | Pipe creep measurement system and method |
| WO2022247036A1 (en) * | 2021-05-28 | 2022-12-01 | 西安热工研究院有限公司 | System and method for measuring circumference of pipeline on the basis of ultrasonic waves |
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| WO2021057288A1 (en) | 2021-04-01 |
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