CN109507283A - A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method - Google Patents
A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method Download PDFInfo
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- CN109507283A CN109507283A CN201811402010.2A CN201811402010A CN109507283A CN 109507283 A CN109507283 A CN 109507283A CN 201811402010 A CN201811402010 A CN 201811402010A CN 109507283 A CN109507283 A CN 109507283A
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- pccp
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- steel wire
- wire
- excitation coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
Abstract
The invention discloses a kind of PCCP pipeline steel wire fracture of wire far-field vortex checking methods, the method is based on circumferential magnetization principle, the following steps are included: using the excitation coil arranged along PCCP radial passage, low-frequency ac exciting current is passed in radial excitation coil, is caused along the mutation magnetic field of PCCP cross-section of pipeline circle distribution；At excitation coil three times caliber far-field region, along PCCP pipeline, radially arrangement detection coil, detection coil measure INDIRECT COUPLING magnetic field signal, which is recorded in pocket of electrons as detection data by data collection system；The effect in mutation magnetic field and PCCP pipeline steel wire fracture of wire that excitation coil generates, the signal amplitude receive to detection coil and detection signal have an impact relative to the phase difference of exciting current, are achieved in the detection of PCCP pipeline steel wire fracture of wire.The present invention can rapidly and accurately realize the detection of PCCP pipeline steel wire broken wires mesh and position.
Description
Technical field
The present invention relates to technical field of nondestructive testing more particularly to a kind of PCCP pipeline steel wire fracture of wire precursor in far field sides
Method.
Background technique
Prestressed concrete cylinder pipe (PCCP) is a kind of by the anti-of the tension of high tensile steel wire, the resistance to compression of concrete and steel plate
Infiltration is organically combined together, and the water transferring line of the respective high-quality of physico mechanical characteristic of material is sufficiently and reasonably utilized.It
In China, water conservancy, city fields such as draining of having stable political situation are widely applied.Wherein, in south water to north east line, work centerline and Shanxi
The successful application for saving Vancomycin resistance yellow river diversion project makes China's PCCP technology gradually tend to be mature.
The intensity of PCCP depends primarily on compressor wire force-bearing situation on tube core, however during construction or operation,
The loss and destruction that a variety of causes all will lead to steel wire are likely to result in public affairs so that PCCP pipeline can be caused bursting accident occur
The loss of property and the harm of local environment altogether.
In the implementation of the present invention, discovery at least has the following disadvantages in the prior art and deficiency by inventor:
In traditional PCCP pipeline steel wire fracture of wire detection technique, detected using the method for internal range estimation and detection of echoes
PCCP pipeline situation.Enter pipeline range estimation by experience personnel, taps pipeline and identify echo, pipeline situation is distinguished with this.This method
It is only capable of the pipeline that identification is in critical slope langth state, and depends on the experience of personnel, low efficiency, low precision.
Summary of the invention
The present invention provides a kind of PCCP pipeline steel wire fracture of wire far-field vortex checking methods, for realizing to PCCP pipe line steel
The detection of silk fracture of wire number and location improves detection accuracy, described below:
A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method, the method be based on circumferential magnetization principle, including with
Lower step:
Using the excitation coil arranged along PCCP radial passage, low-frequency ac excitation electricity is passed in radial excitation coil
Stream causes along the mutation magnetic field of PCCP cross-section of pipeline circle distribution；
At excitation coil three times caliber far-field region, along the radial arrangement detection coil of PCCP pipeline, detection line
Circle measurement INDIRECT COUPLING magnetic field signal, the magnetic field signal are recorded in pocket of electrons as detection data by data collection system；
The effect in mutation magnetic field and PCCP pipeline steel wire fracture of wire that excitation coil generates, the signal that detection coil is received
Amplitude and detection signal have an impact relative to the phase difference of exciting current, are achieved in the detection of PCCP pipeline steel wire fracture of wire.
Further, the detection coil axis is along the axially measured magnetic field signal of pipeline.
The beneficial effect of the technical scheme provided by the present invention is that:
It 1, is that Circumferential field and PCCP pipeline steel wire fracture of wire have using the advantages of remote field eddy current technology of circumferential magnetization principle
Stronger effect, the detection of steel wire fracture of wire easy to accomplish；
2, it being found through experiments that, the middle technical solution designed carries out the detection of PCCP pipeline steel wire fracture of wire according to the present invention,
It can rapidly and accurately realize the detection of PCCP pipeline steel wire broken wires mesh and position.
Detailed description of the invention
Fig. 1 is the shaft section figure using the ac-excited Remote Field Eddy Current Probe of radial unicoil；
Fig. 2 is the B direction view of Fig. 1.
1: excitation coil；2: support shaft；
3: detection coil；4: data acquisition module；
5:PCCP pipeline.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention is made below further
Ground detailed description.
Remote Field Eddy Current Probe is characterized in: Remote Field Eddy Current Probe is by the excitation that passes to low-frequency ac circuit coaxial with pipeline
Coil and radially-arranged detection coil apart from excitation coil three times pipe interior diameter (far-field region) are constituted.From excitation coil to
Detection coil positioned at far-field region co-exists in two different energy transfer ways: there are a direct-coupling energy to pass in pipe
Approach is broadcast, the characteristics of this portion of energy is the increase with the distance for leaving excitation coil with exponential damping；Another part energy
Tube wall is penetrated near excitation coil to pass to outside pipe, is returned to detected Coil Detector in pipe near detection coil later and is arrived, this
Portion of energy is also with exponential damping, but attenuation amplitude is more much smaller than direct-coupling energy；Final exercising result is exactly that inner wall is total
Detection signal from being almost direct-coupled as a result, in far-field region in the closer region of excitation coil (near-field region)
It is almost the result for reentering the far field coupling of tube wall.
Far-field eddy is often to detect the phase difference of signal and pumping signal as echo signal to be measured, according to skin effect
The formula phase difference value is directly proportional to the pipe thickness that direct-coupling energy passes through, therefore the far field whirlpool of the corrosion default of volume type
Stream testing principle can obtain intuitive explanation.Have between the compressor wire of PCCP pipeline external and the steel cylinder core of pipeline mixed
Solidifying soil coating, the two is mutually insulated.Magnetic field energys and prestressing force different from precursor in far field, being pierced by from steel cylinder tube wall
Two secondary couplings occur for steel wire, and INDIRECT COUPLING path of the two secondary coupling energy a part outside tube wall continues to propagate and decline with index
Subtract, this portion of energy carries the defect information of steel wire fracture of wire, and another part then penetrates tube wall again, along direct-coupling path after
It resumes and broadcasts, and with exponential damping, the rate of decay of the rate of decay of this portion of energy than the energy along INDIRECT COUPLING propagated
Fastly.Based on the principle, the embodiment of the present invention proposes PCCP pipeline steel wire fracture of wire far-field vortex checking method.
The PCCP pipeline steel wire fracture of wire Far Field Swirl Detecting Technology of 1 and 2 pair of embodiment of the present invention design with reference to the accompanying drawing
Scheme and embodiment are described further.
In internal diameter of the pipeline to arrangement excitation coil 1,200Hz alternating current is passed through into excitation coil 1, alternating current causes
Mutation Distribution of Magnetic Field on the circumference of 5 cross section of PCCP pipeline, vortex, the tube wall near excitation coil 1 are caused in mutation magnetic field
A part as INDIRECT COUPLING energy path.
At the far-field region apart from 1 three times caliber of excitation coil, INDIRECT COUPLING energy is reentered in PCCP pipeline 5
Portion is received by the detection coil 3 radially arranged along PCCP pipeline 5, and detection coil 3 is believed along the axially measured magnetic field of PCCP pipeline 5
Number.Detection signal is recorded in pocket of electrons using data acquisition module 4 and is preserved, point unified after the completion of detection work
Analysis and processing.
Excitation coil 1 and detection coil 3 is relatively fixed and the part such as support shaft 2, data acquisition module 4 collectively forms spy
Head advances in PCCP pipeline 5, all constant without signal amplitude in the presence of fracture of wire and the phase difference relative to exciting current.Amplitude
Mutation with phase difference indicates that there are the fracture of wires of compressor wire in INDIRECT COUPLING energy transmission path.
Since the signal detected is fainter, noise reduction is needed to amplify, it can be in signal processing using filter, orthogonal
The corrective measures such as lock-in amplifier improve signal ratio.The amplitude and phase of signal are collectively as detection signal.
The embodiment of the present invention to the model of each device in addition to doing specified otherwise, the model of other devices with no restrictions,
As long as the device of above-mentioned function can be completed.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, the embodiments of the present invention
Serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method, which is characterized in that it is former that the method is based on circumferential magnetization
Reason, comprising the following steps:
Using the excitation coil arranged along PCCP radial passage, low-frequency ac exciting current is passed in radial excitation coil, is drawn
Hair is along the mutation magnetic field of PCCP cross-section of pipeline circle distribution；
At excitation coil three times caliber far-field region, along PCCP pipeline, radially arrangement detection coil, detection coil are surveyed
INDIRECT COUPLING magnetic field signal is measured, which is recorded in pocket of electrons as detection data by data collection system；
The effect in mutation magnetic field and PCCP pipeline steel wire fracture of wire that excitation coil generates, the signal amplitude that detection coil is received
It is had an impact with detection signal relative to the phase difference of exciting current, is achieved in the detection of PCCP pipeline steel wire fracture of wire.
2. a kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method according to claim 1, which is characterized in that described
Detection coil axis is along the axially measured magnetic field signal of pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402010.2A CN109507283A (en) | 2018-11-22 | 2018-11-22 | A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402010.2A CN109507283A (en) | 2018-11-22 | 2018-11-22 | A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method |
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| CN109507283A true CN109507283A (en) | 2019-03-22 |
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| CN201811402010.2A Pending CN109507283A (en) | 2018-11-22 | 2018-11-22 | A kind of PCCP pipeline steel wire fracture of wire far-field vortex checking method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958884A (en) * | 2019-04-04 | 2019-07-02 | 中国水利水电科学研究院 | Inside bearing strip PCCP pipeline circuit wire position detection system, method and electronic equipment |
| CN110018228A (en) * | 2019-04-26 | 2019-07-16 | 中国水利水电科学研究院 | Embedded type PCCP pipeline circuit wire position detection system, method and device |
| CN114034764A (en) * | 2022-01-08 | 2022-02-11 | 北京国电瑞源科技发展有限公司 | Electromagnetic method device and method for detecting broken wire of PCCP (prestressed concrete Cylinder pipe) |
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| US20030164698A1 (en) * | 2001-01-29 | 2003-09-04 | Paulson Peter O | Electromagnetic analysis of concrete tensioning wires |
| CN101261246A (en) * | 2007-03-09 | 2008-09-10 | 清华大学 | Pipeline crack far-field vortex checking method |
| CN104280453A (en) * | 2014-10-10 | 2015-01-14 | 苏州混凝土水泥制品研究院有限公司 | System applied to detection of broken PCCP (Prestressed Concrete Cylinder Pipe) steel wires |
| CN104359970A (en) * | 2014-10-10 | 2015-02-18 | 苏州混凝土水泥制品研究院有限公司 | PCCP (prestressed concrete cylinder pipe) steel wire breaking detection main unit |
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2018
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| US20030164698A1 (en) * | 2001-01-29 | 2003-09-04 | Paulson Peter O | Electromagnetic analysis of concrete tensioning wires |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958884A (en) * | 2019-04-04 | 2019-07-02 | 中国水利水电科学研究院 | Inside bearing strip PCCP pipeline circuit wire position detection system, method and electronic equipment |
| CN109958884B (en) * | 2019-04-04 | 2020-03-31 | 中国水利水电科学研究院 | System and method for detecting broken wire position of lining type PCCP pipeline and electronic equipment |
| CN110018228A (en) * | 2019-04-26 | 2019-07-16 | 中国水利水电科学研究院 | Embedded type PCCP pipeline circuit wire position detection system, method and device |
| CN110018228B (en) * | 2019-04-26 | 2024-02-27 | 中国水利水电科学研究院 | System, method and device for detecting broken wire position of embedded PCCP (prestressed concrete cylinder pipe) |
| CN114034764A (en) * | 2022-01-08 | 2022-02-11 | 北京国电瑞源科技发展有限公司 | Electromagnetic method device and method for detecting broken wire of PCCP (prestressed concrete Cylinder pipe) |
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Application publication date: 20190322 |
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