CN109374756A - A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection - Google Patents
A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection Download PDFInfo
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- CN109374756A CN109374756A CN201811453485.4A CN201811453485A CN109374756A CN 109374756 A CN109374756 A CN 109374756A CN 201811453485 A CN201811453485 A CN 201811453485A CN 109374756 A CN109374756 A CN 109374756A
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- heat exchanger
- exchanger tube
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- 239000004020 conductor Substances 0.000 title claims abstract description 87
- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 230000005284 excitation Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000005415 magnetization Effects 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 101000860173 Myxococcus xanthus C-factor Proteins 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000005255 carburizing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RIVZIMVWRDTIOQ-UHFFFAOYSA-N cobalt iron Chemical compound [Fe].[Co].[Co].[Co] RIVZIMVWRDTIOQ-UHFFFAOYSA-N 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/262—Linear objects
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention relates to a kind of dedicated super magnetic conductor excitation patches and detection method for heat exchanger tube detection, it is characterized in that, heat exchanger tube tube body is equipped with the super magnetic conductor patch group of several groups, if in each group of super magnetic conductor patch group including the super magnetic conductor patch of dry plate, one group of magnet exciting coil, longitudinal magnetization is used per a piece of super magnetic conductor patch in patch group, that is magnetic direction and detected workpiece is axially parallel, it is arranged circumferentially on being detected workpiece, if magnet exciting coil is wrapped circumferentially around on the super magnetic conductor patch of dry plate, and add couplant, the magnet exciting coil connecting detection instrument.The detection compared with small diameter tube or labyrinth pipeline may be implemented in the present invention, is particularly suitable for heat exchanger tube detection.The method of the present invention space utilization rate is high, and patch is easy to operate, avoids the risk that the tedious steps of installation permanent magnet and operator are weighed wounded by permanent magnet in conventional directly Magnitizing method.
Description
[technical field]
The present invention relates to a kind of ultrasonic guided wave detection technology fields, more particularly to one kind for examining U-shaped or S type to change
The guided wave detection technology of heat pipe.
[background technique]
For for a long time directly by flame heating irradiation heat exchanger tube or high-temperature steam mass transfer that perhaps high-temperature flue gas conducts heat
The heat-exchanging tube bundle of heat transfer be easy to cause a series of corrosion failures such as carburizing, vulcanization, oxidation, deformation.Generally passed to guarantee to strengthen
Heat, large heat exchanger heat exchanger tube have space structure, are made into U-shaped or S type, this kind of structure construction is complicated, and size is larger, dismounting
Survey etc. in tube wall occurs for difficult and carburizing and deformation.During conventional Guided waves, guided wave self-characteristic is traveled to curved
It is easy to happen dispersion phenomenon at head, is received to a hair one or the routine inspection of internal loopback brings difficulty.
[summary of the invention]
It is an object of the invention to overcome defect of the existing technology, provide a kind of for the dedicated of Tube Sheet of Heat Exchanger detection
Super magnetic conductor excitation patch and arrangement and application method, it is ensured that guided wave can effectively exchange heat pipe straight pipe and elbow it is each
It is effectively detected in a place.This method is not generated dry by the guided wave signals issued between time control guarantee superconduction patch
It disturbs.It is easy to operate, it improves efficiency, and be able to carry out the untouchable detection of real-time ultrasound guided wave, avoids in conventional direct magnetic
The risk that the tedious steps of installation permanent magnet and operator are weighed wounded by permanent magnet in change method.
To achieve the above object, a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection is designed, feature exists
In heat exchanger tube tube body is equipped with the super magnetic conductor patch group of several groups, if in each group of super magnetic conductor patch group including the super magnetic of dry plate
Conductor patch, one group of magnet exciting coil use longitudinal magnetization, i.e. magnetic direction and quilt per a piece of super magnetic conductor patch in patch group
It is axially parallel to detect workpiece, is arranged circumferentially on being detected workpiece, if magnet exciting coil is wrapped circumferentially around the super magnetic conductance of dry plate
On piece is shown consideration for, and adds couplant, the magnet exciting coil connecting detection instrument.
Further, one end of the straight pipe of heat exchanger tube is equipped with super magnetic conductor patch group A, and the other end of straight pipe is equipped with super
It is equipped with guided wave signals transmitting probe at magnetic conductor patch group B, super magnetic conductor patch group A, is equipped with guided wave at super magnetic conductor patch group B
Probe receiver, the guided wave signals transmitting probe and guided wave signals receiving transducer connect a connection by super magnetic conductor patch
The signal data line of instrument forms.
Further, the elbow of heat exchanger tube, elbow front is equipped with super magnetic conductor patch group B, at super magnetic conductor patch group B
Equipped with guided wave signals transmitting probe, elbow rear portion is equipped with super magnetic conductor patch group C, is equipped with guided wave at super magnetic conductor patch group C and believes
Number receiving transducer, the guided wave signals transmitting probe connect a connection instrument by super magnetic conductor patch with guided wave signals receiving transducer
The signal data line of device forms.
Further, it is rectangle that the super magnetic conductor patch, which is shape, is made of the material of superhigh magnetic conductivity.
Further, the magnet exciting coil is the copper bar line of 40 the number of turns, connects to form a closed loop by connector, is surround
In outside detected workpiece tube.
A kind of detection method of the dedicated super magnetic conductor excitation patch for heat exchanger tube detection, which is characterized in that between use
Magnitizing method is connect, super magnetic conductor patch is subjected to longitudinal magnetization first, then patch is arranged circumferentially on detected object,
Then magnet exciting coil is wrapped circumferentially around on magnetic conductor patch, is postponed completing cloth, magnet exciting coil will be in super magnetic conductor patch
Longitudinal wave guide is generated, longitudinal wave guide enters detected object by couplant.
The present invention is since longitudinal wave guide is to enter back into detected workpiece after generating in super magnetic conductor patch, using this
Detection of the longitudinal wave guide to the heat exchanger tube of non-magnet material heat exchanger tube and complicated shape may be implemented in inventive method.Superhigh magnetic conductivity
Super magnetic conductor patch, thickness is thin, and the energy that magnet exciting coil needs particle vibration in the patch on heat exchanger tube is smaller, because
This instrument power is minimized, and the detection compared with small diameter tube or labyrinth pipeline may be implemented, and is particularly suitable for heat exchanger tube inspection
It surveys.The method of the present invention space utilization rate is high, and patch is easy to operate, avoids and installs permanent magnet in conventional directly Magnitizing method
The risk that tedious steps and operator are weighed wounded by permanent magnet.
[Detailed description of the invention]
Fig. 1 a-1c is the super magnetic conductor patch scheme of installation of the present invention；
Fig. 2 is U heat exchange structural schematic diagram of the present invention；
Fig. 3 is S type heat transfer tube structure diagram of the present invention；
Description of symbols:
1 surpass magnetic conductor patch, 2 detected workpiece, 3 magnet exciting coils, 4 couplants 5 surpass magnetic conductor patch group A, 6 surpass magnetic conductance
Piece group B is shown consideration for, magnetic conductor patch group C 7 is surpassed, 8 surpasses magnetic conductor patch group D, 9 data flat cables, 10 connection instruments.
[specific embodiment]
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment one
The present invention relates to a kind of dedicated super magnetic conductor excitation patches for heat exchanger tube detection, as illustrated by figures 1 a-1 c, heat exchange
Pipe tube body is equipped with the super magnetic conductor patch group of several groups, if in each group of super magnetic conductor patch group including the super magnetic conductor patch of dry plate
1, one group of magnet exciting coil 3 carries out longitudinal magnetization, i.e. magnetic direction with permanent magnet per a piece of super magnetic conductor patch 1 in patch group
It is axial parallel with detected workpiece 2, it is arranged circumferentially on detected workpiece 2, if magnet exciting coil 3 is wrapped circumferentially around dry plate
On super magnetic conductor patch 1, and couplant is added, the magnet exciting coil connecting detection instrument, magnet exciting coil 3 is for generating longitudinal lead
Wave, and entered inside workpiece 2 to be detected by couplant 4.
The super magnetic conductor patch is a kind of material with superhigh magnetic conductivity, can be ferrocobalt band etc., shape is
Rectangle.
The mode of magnetization: the super magnetic conductor patch needs to carry out longitudinal magnetization, and is arranged circumferentially in detected object
On, magnetic direction and detected workpiece are axially parallel, and all patch magnetic directions are identical.
Magnet exciting coil parameter: the excitation coil is the copper bar line of 40 the number of turns, and excitation coil connects to be formed by connector
One closed loop, is surrounded on outside pipe.The excitation coil canoe is to be wrapped circumferentially around on magnetic conductor patch, and excitation coil exists
Excitation generates longitudinal wave guide in super magnetic conductor patch.
Super magnetic conductor patch is subjected to longitudinal magnetization first, excitation coil will generate longitudinal lead in super magnetic conductor patch
Wave, longitudinal wave guide enter detected object by couplant.This method is controlled by the time to be guaranteed to issue between superconduction patch
Guided wave signals do not generate interference.
Embodiment two
On the basis of example 1, specific arrangement is carried out further directed to U-shaped, it is ensured that guided wave can be effectively right
It is effectively detected in each place of the straight pipe and elbow of heat exchanger tube.
Detect the principle with elbow complex space pipe: U-tube is as shown in Figure 2: this kind of shape heat exchanger tube, by 4 groups of super magnetic conductances
Show consideration for piece constitute, during ultrasonic guided wave detecting, in longitudinal ultrasonic guided wave communication process, be easy elbow occur frequency
A hair one is arranged during Guided waves and receives probe for scattered problem.
Operating mode: pumping signal is issued by patch group A (5) in the t1 time, patch group B (6) is as receiving guided wave signals
End, at this time since AB pipeline section is straight pipe, the guided wave signals at B can effectively reflect the face as caused by defect of AB pipeline section
Product is lost and the energy loss of the wave signal of generation, thus determines defect, realizes the detection to AB sections.
In the t2 time, pumping signal is issued by patch group B (6), patch group C (7) as guided wave signals end is received, at this time by
Be that elbow adds straight pipe in BC pipeline section, frequency dispersion can occur for the ultrasonic guided wave signals of the place B generation, L (0,2) mode can be converted to L (0,
And L (1,1), 1) L (1,2) mode.It needs to place excitation at this time and part before elbow, close elbow, it is ensured that most of guided wave
Energy can pass through elbow, and receive at C, by receiving the orientation for receiving L (0,2) modal frequency, determine that elbow lacks
It falls into, realizes the detection to BC pipeline section.
It is equal to t2 time service principle in t3 time service principle.
Time control: the longitudinal wave guide that the t1 time emits continues on the propagation of workpiece efficiency frontier after passing through elbow, to protect
The guided wave signals issued between card superconduction patch do not generate interference, should follow
Δ t > t2-t1
Δ t=L/V
Wherein: L is the total length of heat exchanger tube, and V is spread speed of the guided wave under L (0,2) mode.
Embodiment three
S bend pipe is as shown in Figure 3: principle is identical as U-tube testing principle.
Transmitting and receives signal data line and signal open theory at signal: in this kind of detection method, each super magnetic conductor
Patch all as the signal issuing side of specific time and receiving end, such as patch group B (6) at the t1 moment as patch at A
The receiving end of the guided wave of sending, at the t2 moment as excitation guided wave signals issuing side, the guided wave signals of sending are connect by C (7)
It receives.Therefore each super magnetic conductor patch has the signal data line of a connection instrument.It can be controlled by programming by low and high level special
Determine the unlatching of two adjacent groups data line, one with motivating super magnetic conductor, issuing longitudinal ultrasonic guided wave, another phase for issuing signal
Adjacent data line is for receiving the signal containing the portions information.
Claims (10)
1. a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection, which is characterized in that if heat exchanger tube tube body is equipped with
The dry super magnetic conductor patch group of group, if in each group of super magnetic conductor patch group including the super magnetic conductor patch of dry plate, one group of magnet exciting coil,
Longitudinal magnetization is used per a piece of super magnetic conductor patch in patch group, i.e. magnetic direction and detected workpiece is axially parallel, circumferential
It is evenly arranged on detected workpiece, if magnet exciting coil is wrapped circumferentially around on the super magnetic conductor patch of dry plate, and adds couplant,
The magnet exciting coil connecting detection instrument.
2. a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as described in claim 1, which is characterized in that change
One end of the straight pipe of heat pipe is equipped with super magnetic conductor patch group A, and the other end of straight pipe is equipped with super magnetic conductor patch group B, super magnetic
It is equipped with guided wave signals transmitting probe at conductor patch group A, guided wave signals receiving transducer is equipped at super magnetic conductor patch group B, it is described
Guided wave signals transmitting probe is connected the signal data line of a connection instrument with guided wave signals receiving transducer by super magnetic conductor patch
Composition.
3. a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as described in claim 1, which is characterized in that change
The elbow of heat pipe, elbow front are equipped with super magnetic conductor patch group B, and guided wave signals transmitting is equipped at super magnetic conductor patch group B and is visited
Head, elbow rear portion are equipped with super magnetic conductor patch group C, are equipped with guided wave signals receiving transducer, the guided wave at super magnetic conductor patch group C
Signal transmitting probe is made of with guided wave signals receiving transducer the signal data line that super magnetic conductor patch connects a connection instrument.
4. a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as described in claim 1, which is characterized in that institute
It is rectangle that state super magnetic conductor patch, which be shape, is made of the material of superhigh magnetic conductivity.
5. a kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as described in claim 1, which is characterized in that institute
The copper bar line that magnet exciting coil is 40 the number of turns is stated, connects to form a closed loop by connector, be surrounded on outside detected workpiece tube.
6. a kind of detection method of the dedicated super magnetic conductor excitation patch for heat exchanger tube detection, which is characterized in that using indirect
Super magnetic conductor patch is carried out longitudinal magnetization first, then patch is arranged circumferentially on detected object by Magnitizing method, so
Magnet exciting coil is wrapped circumferentially around on magnetic conductor patch afterwards, is postponed completing cloth, magnet exciting coil will produce in super magnetic conductor patch
Raw longitudinal wave guide, longitudinal wave guide enter detected object by couplant.
7. a kind of detection method of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as claimed in claim 6,
It is characterized in that, the straight pipe of heat exchanger tube, pumping signal, super magnetic conductor patch group B is issued by super magnetic conductor patch group A in the t1 time
As guided wave signals end is received, at this time since AB pipeline section is straight pipe, the guided wave signals at B can effectively reflect AB pipeline section
The space wastage as caused by defect and the energy loss of wave signal generated, thus determine defect, realize the detection to AB sections.
8. a kind of detection method of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as claimed in claim 6,
It is characterized in that, the elbow of heat exchanger tube combines segmented Guided waves, in the t2 time, is issued and is motivated by super magnetic conductor patch group B
Signal, as guided wave signals end is received, frequency dispersion, L can occur super magnetic conductor patch group C for the ultrasonic guided wave signals occurred at B at this time
(0,2) mode can be converted to L (0,1) and L (1,1), L (1,2) mode, by excitation place with part before elbow, close to elbow, really
Elbow can be passed through by protecting most of guided wave energy, and be received at C, by receiving the orientation for receiving L (0,2) modal frequency,
Determine elbow defect, realizes the detection to BC pipeline section.
9. a kind of detection method of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as claimed in claim 6,
Be characterized in that, time control: the longitudinal wave guide that the t1 time emits continues on the propagation of workpiece efficiency frontier after passing through elbow, to protect
The guided wave signals issued between card superconduction patch do not generate interference, should follow
Δ t > t2-t1
Δ t=L/V
Wherein: L is the total length of heat exchanger tube, and V is spread speed of the guided wave under L (0,2) mode.
10. a kind of detection method of dedicated super magnetic conductor excitation patch for heat exchanger tube detection as claimed in claim 6,
Be characterized in that, in this kind of detection method, each super magnetic conductor patch as a specific time signal issuing side with connect
Receiving end, each super magnetic conductor patch have the signal data line of a connection instrument, are controlled by programming by low and high level specific
Two adjacent groups data line is opened, and one with motivating super magnetic conductor, issuing longitudinal ultrasonic guided wave, another adjacent for issuing signal
Data line is for receiving the signal containing the portions information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453485.4A CN109374756A (en) | 2018-11-30 | 2018-11-30 | A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453485.4A CN109374756A (en) | 2018-11-30 | 2018-11-30 | A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection |
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| Publication Number | Publication Date |
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| CN109374756A true CN109374756A (en) | 2019-02-22 |
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| CN201811453485.4A Pending CN109374756A (en) | 2018-11-30 | 2018-11-30 | A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6429650B1 (en) * | 1999-03-17 | 2002-08-06 | Southwest Research Institute | Method and apparatus generating and detecting torsional wave inspection of pipes or tubes |
| CN101173911A (en) * | 2007-10-17 | 2008-05-07 | 中国人民解放军海军工程大学 | Fast checking method for pipe defect and nondestructive testing apparatus |
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2018
- 2018-11-30 CN CN201811453485.4A patent/CN109374756A/en active Pending
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| CN209148606U (en) * | 2018-11-30 | 2019-07-23 | 上海市特种设备监督检验技术研究院 | A kind of dedicated super magnetic conductor excitation patch for heat exchanger tube detection |
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