CN106841395A - A kind of composite strengthens metallic conduit the cannot-harm-detection device and method - Google Patents
A kind of composite strengthens metallic conduit the cannot-harm-detection device and method Download PDFInfo
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- CN106841395A CN106841395A CN201611156540.4A CN201611156540A CN106841395A CN 106841395 A CN106841395 A CN 106841395A CN 201611156540 A CN201611156540 A CN 201611156540A CN 106841395 A CN106841395 A CN 106841395A
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- 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
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- 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
- G01N29/223—Supports, positioning or alignment in fixed situation
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- 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
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
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- 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
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- 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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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of composite enhancing metallic conduit the cannot-harm-detection device, cradling piece including being installed on pipe under test surface, some acoustic emission sensors are installed on cradling piece, the two ends of cradling piece are respectively provided with switching regulator magnet base, the length of cradling piece is less than the length of tested pipeline, more than the length of tested pipeline composite enhancement layer.The present invention needs to carry out autofrettage this feature for composite construction pipeline, acoustic emission detection is carried out to pipeline in this stage, and because autofrettage is that compound pipeline complex pipeline is pressurized first, substantial amounts of acoustic emission signal can be produced during this, these signals to a certain extent can with reacting pipe outer layer of composite material layer processing quality and other defects this stage spread scenarios.Autofrettage is last process of single composite construction pipeline shaping, and carrying out acoustic emission detection to it in the process will not only destroy pipeline configuration, also save detection time.
Description
【Technical field】
The invention belongs to pipeline non-destructive testing field, be related to a kind of composite enhancing metallic conduit the cannot-harm-detection device and
Method.
【Background technology】
As what pipeline pressure and throughput rate were required gradually increases, it is an important hair to improve pipeline bearing capacity
Exhibition direction, have developed composite based on this strengthens the compound pipeline complex pipeline of metallic conduit, usually using methods such as windings, by fiber
Metallic conduit surface is combined and be coated on resin material, so as to improve the bearing capacity of pipeline, reaches raising metallic conduit defeated
Send the requirement of ability.
Currently for this kind of pipeline detection method in addition to ocular estimate, mainly using the method for hydraulic pressure demolition, when
Technique is good when the design requirement that burst pressure reaches thinks that composite is molded, no significant defect in composite.This kind of side
Method is confined to characterize the performance of single pipe, and sample is scrapped after detection, it is therefore desirable to strengthen metal tube for composite
Develop lossless detection method in road.
The structure of compound pipeline complex pipeline mainly has metal level and composite layer, and wherein steel pipe needs to carry out lossless inspection before compound
Test, commonly used approach is X-ray detection or ultrasound etc., for the current comparative maturity of method of Non-destructive Testing on Metal.
Lossless detection method for composite has also mainly continued the detection of metal material, in addition to supercritical ultrasonics technology and x-ray method,
Also including Computer tomography method, microwave method, visual method etc., but the characteristic due to composite inherently, these sides
Method is applied to the larger defect of composite inner mostly, is all had some limitations in terms of NDT of composite.
【The content of the invention】
Strengthen the test problems of metallic conduit it is an object of the invention to solve composite, there is provided a kind of composite increases
Strong metal pipeline non-destructive testing device and method, the method carries out lossless during compound pipeline complex pipeline is processed to composite layer
Detection, will not destroy to body.And the application for the method on pipeline, devise the fixed dress of acoustic emission sensor
Put.
To reach above-mentioned purpose, the present invention is achieved using following technical scheme：
A kind of composite enhancing metallic conduit the cannot-harm-detection device, including the cradling piece on pipe under test surface is installed on,
Some acoustic emission sensors are installed, the two ends of cradling piece are respectively provided with switching regulator magnet base, and the length of cradling piece is small on cradling piece
In the length of tested pipeline, more than the length of tested pipeline composite enhancement layer.
The present invention is further improved：
Acoustic emission sensor is connected on cradling piece by spring, is consolidated acoustic emission sensor by the pressuring action of spring
It is scheduled on tested pipeline surface.
Tested pipeline surface with 0.5m be interval, each interval fixes 2 acoustic emission sensors, and is separated by 180 °.
The acoustic emission sensor of two neighboring interval is in 90 ° along the angle of tubing radial direction.
22 acoustic emission sensors are installed altogether on cradling piece.
A kind of composite strengthens metallic conduit lossless detection method, comprises the following steps：
1) composite enhancing steel pipe sample pipe prepares
With diameter 508mm, the steel pipe of 6m long is liner, the composite wood that epoxy resin E51 and 158B type glass fibre is made
Material enhancing steel conduit, wherein thickness of steel pipe 9.5mm, composite thickness 4.6mm, resin content is 28% in composite layer；Pipe
Road is piping connection portion at the 15cm of two ends, does not carry out the winding of enhancement layer in the pipeline production phase；
2) installation detecting device
The steel tube surface that the switching regulator magnet base absorption at cradling piece two ends is not wound in tested pipeline end, by spring
Pressuring action, acoustic emission sensor is fixed on tested pipeline surface；
3) autofrettage pressure, sound-emission signal recording and analysis are applied
Pressurizeed after tested pipeline two ends are sealed, pressure release after pressurize 1min when being forced into 25MPa records the sound hair of this process
Signal is penetrated, this process acoustic emission signal figure is observed；If there is the signal of below 50dB, it was demonstrated that exist between fiber and resin matrix
Interfacial detachment, segregation phenomenon, winding mass are poor；It is completed rear removal acoustic emission sensor, removal multiple tube, completion sound hair
Penetrate the self-tightening process of detection and pipeline.
Compared with prior art, the invention has the advantages that：
The present invention using electrothermal prestressing (self-tightening) process composite construction pipeline, will pressure increase to inner layer steel pipe occur bend
Clothes, produce after being plastically deformed again by discharge degree.Now, because steel pipe there occurs plastic deformation, the composite of outer layer has residual
Remaining tensile stress, the steel pipe of internal layer has the compression stress of remnants.When repressurization, composite undertakes load higher,
Evenly, prestressing force is also the last of composite enhancing metallic conduit shaping to stress distribution between steel layer and composite layer
One procedure of processing.Need to carry out autofrettage this feature for composite construction pipeline, sound is carried out to pipeline in this stage
Transmitting detection, and because autofrettage is that compound pipeline complex pipeline is pressurized first, substantial amounts of acoustic emission signal can be produced during this,
These signals to a certain extent can be with the processing quality of reacting pipe outer layer of composite material layer and other defects in this stage
Spread scenarios.Autofrettage is last process of single composite construction pipeline shaping, carries out sound to it in the process
Transmitting detection will not only destroy pipeline configuration, also save detection time.
【Brief description of the drawings】
Fig. 1 is the expanded view of acoustic emission sensor position of the present invention pipe surface；
Fig. 2 is the design drawing of acoustic emission sensor magnetic bracket of the present invention；
Fig. 3 is acoustic emission detection signal amplitude figure of the invention；
Acoustic emission detection signal amplitude figure when Fig. 4 is poor winding mass of the present invention.
Wherein：1- switching regulator magnet bases；2- springs；3- acoustic emission sensors；4- cradling pieces.
【Specific embodiment】
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 and Fig. 2, composite of the present invention strengthens the cannot-harm-detection device of metallic conduit, during tubular object extruding
Non-Destructive Testing is carried out to multiple tube using the method for sound emission, and coordinates pipe geometry and size, use special sensor branch
Frame.Acoustic emission probe is connected on support by spring, and the length of spring, rigidity, maximum precompressed amount can adjust, it is ensured that sensor
With the tight connection of body.Sensor stand fixing means uses switching regulator magnet base, detection to be adjusted to without magnetic force shape after terminating
State, it is convenient by sensor entirety removal.Special sensor stand can be adjusted according to duct length, it is ensured that length is more than
Enhancement layer length, magnet base is adsorbed in the junction portion not wound.Switching regulator magnet base can make according to number of sensors, and cooperation
Connecting spring, determines magnetism intensity, it is ensured that the fixation of sensor in test process.Acoustic emission detection winding layer quality according to
Signal amplitude figure determines that such as in low amplitude value, i.e. 50dB appears below a large amount of signaling points, and winding layer is second-rate.
Composite of the present invention strengthens the lossless detection method of metallic conduit, comprises the following steps：
(1) composite enhancing steel pipe sample pipe prepares
With diameter 508mm, the steel pipe of 6m long is liner, the composite wood that epoxy resin E51 and 158B type glass fibre is made
Material enhancing steel conduit, wherein thickness of steel pipe 9.5mm, composite thickness 4.6mm, resin content is 28% in composite layer.Pipe
Road is piping connection portion at the 15cm of two ends, does not carry out the winding of enhancement layer in the pipeline production phase.
(2) acoustic emission sensor Position Design
Pipe surface with 0.5m be interval, each interval fix acoustic emission sensor 2, be separated by 180 °, adjacent two
The sensor of individual interval is in mutually 90 °, as shown in figure 1, totally 22 sensors.This design is formulated on the basis of many experiments
, the distance between sensor ensure that whole covering of the acoustic emission probe to pipeline.
(3) the support bracket fastened design of acoustic emission sensor
For the detection of the complete twin conduit within the most short time, the installation set time of sensor should be reduced, to steel pipe
When carrying out acoustic emission detection, sensor is directly adsorbed in steel tube surface by one magnetic base of each sensor configuration.And at this
In test system, because composite layer is nonmagnetic and thickness is thicker, can not can by sensor using common magnetic base
Pipe surface is fixed on by ground, the method fixed using adhesive tape needs time more long again, therefore designs a kind of sensing
Device pedestal, as shown in Figure 2.
The basic structure of pedestal is a stock, and spring is fixed according to the distance of the sensor, and sensor passes through spring
Pressuring action be fixed on pipe surface.Because the two ends 15cm places of composite enhancing steel pipe are junction portion, surface is without twining
Winding layer, therefore the length of cradling piece is less than tested pipeline, is 5.85m more than the length of composite enhancement layer.In pedestal stock
Two install switching regulator magnet base, the steel tube surface that pipeline does not wind on the one hand can be adsorbed on by magnetic sensor, it is another
Aspect facilitates the dismounting of sensor after detection terminates, if duct length or diameter increase, number of sensors is consequently increased, and props up
Magnetic needed for frame two ends can also be improved, and magnetic high can increase the difficulty of pedestal dismounting, therefore selecting switch formula magnet base, reduce
Operating time.
(4) autofrettage pressure, sound-emission signal recording and analysis are applied
After sensor is installed, pressurizeed after pipeline two is sealed, pressure release after pressurize 1min when being forced into 25MPa, record
The acoustic emission signal of this process,
This process acoustic emission signal figure is observed, as shown in Figure 3.Fig. 3 has intercepted the sound hair that 4 acoustic emission signal probes are measured
Signal is penetrated, it can be seen that all signals appear in more than 50dB, without value signal by a narrow margin.According to sound emission in composite wood
Research in terms of material, the acoustic emission signal intensity of different type defect is generally：Intensity >=the MATRIX CRACKING of fibrous fracture it is strong
The signal intensity of degree >=unsticking, therefore high-amplitude value signal is derived mainly from the fracture of the cracking and a small amount of fiber of matrix, if gone out
Now many value signals by a narrow margin, i.e., in the signal of below 50dB, it was demonstrated that Presence of an interface unsticking between fiber and resin matrix, separate it is existing
As winding mass is poor, and signal graph is as shown in Figure 4.
Rear removal acoustic emission sensor is completed, removal multiple tube completes the self-tightening process of acoustic emission detection and pipeline.
Principle of the invention：
Sound emission is to evaluate the nothing of material property or structural intergrity by receiving the acoustic emission signal with analysis of material
Damage detection method.Material can discharge strain energy during plastic deformation or damage and failure, while producing stress wave, this letter
Number can be received by the sensor of acoustic emission equipment, and signal transacting and defect analysis are carried out by systems soft ware.It is fine
The main sound emission source of dimension enhancing composite includes that base material cracking, fibrous fracture, fiber are separated with matrix, are layered equivalent damage
Mechanism.
Strengthen metallic conduit for composite, the use of most composite is at present glass fiber reinforcement epoxy or not
The thermosetting resins such as saturated polyester.The modulus of glass fiber compound material is 35-45GPa, and the modulus of steel is 206GPa, two knots
Modulus difference between structure layer is larger, therefore under the effect of internal pressure power, composite carries relatively low, and its humidification is difficult hair
Wave.In order to solve this problem, using electrothermal prestressing (self-tightening) process composite construction pipeline, will pressure increase to inner layer steel pipe
Surrender, produce after being plastically deformed again by discharge degree.Now, because steel pipe there occurs plastic deformation, the composite wood of outer layer
Material has the tensile stress of remnants, and the steel pipe of internal layer has the compression stress of remnants.When repressurization, composite undertakes higher
Load, evenly, prestressing force is also composite enhancing metallic conduit shaping to the stress distribution between steel layer and composite layer
Last procedure of processing.
Need to carry out autofrettage this feature for composite construction pipeline, sound emission inspection is carried out to pipeline in this stage
Survey, and because autofrettage is that compound pipeline complex pipeline is pressurized first, substantial amounts of acoustic emission signal can be produced during this, these letters
Number to a certain extent can with the processing quality of reacting pipe outer layer of composite material floor and other defects this stage extension feelings
Condition.Autofrettage is last process of single composite construction pipeline shaping, carries out sound emission inspection to it in the process
Survey will not only destroy pipeline configuration, also save detection time.
Above content is only explanation technological thought of the invention, it is impossible to limit protection scope of the present invention with this, every to press
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within claims of the present invention
Protection domain within.
Claims (6)
1. a kind of composite strengthens metallic conduit the cannot-harm-detection device, it is characterised in that including being installed on pipe under test surface
Cradling piece (4), some acoustic emission sensors (3) are installed on cradling piece (4), the two ends of cradling piece (4) are respectively provided with switching regulator
Magnet base (1), the length of the length less than tested pipeline of cradling piece (4), more than the length of tested pipeline composite enhancement layer.
2. composite according to claim 1 strengthens metallic conduit the cannot-harm-detection device, it is characterised in that sound emission is passed
Sensor (3) is connected on cradling piece (4) by spring (2), and the pressuring action by spring (2) is solid by acoustic emission sensor (3)
It is scheduled on tested pipeline surface.
3. composite according to claim 1 strengthens metallic conduit the cannot-harm-detection device, it is characterised in that in measured tube
Road surface is interval with 0.5m, and each interval fixes 2 acoustic emission sensors (3), and is separated by 180 °.
4. composite according to claim 3 strengthens metallic conduit the cannot-harm-detection device, it is characterised in that two neighboring
The acoustic emission sensor of interval is in 90 ° along the angle of tubing radial direction.
5. the composite according to claim 1 or 3 or 4 strengthens metallic conduit the cannot-harm-detection device, it is characterised in that branch
22 acoustic emission sensors are installed altogether on hack lever (4).
6. composite described in a kind of use claim 1-4 any one strengthens the detection side of metallic conduit the cannot-harm-detection device
Method, it is characterised in that comprise the following steps：
1) composite enhancing steel pipe sample pipe prepares
With diameter 508mm, the steel pipe of 6m long is liner, and the composite that epoxy resin E51 and 158B type glass fibre is made increases
Strong steel conduit, wherein thickness of steel pipe 9.5mm, composite thickness 4.6mm, resin content is 28% in composite layer；Pipeline is leaned on
It is piping connection portion at two close end 15cm, does not carry out the winding of enhancement layer in the pipeline production phase；
2) installation detecting device
The steel tube surface that the switching regulator magnet base absorption at cradling piece two ends is not wound in tested pipeline end, by the pressure of spring
Tight effect, tested pipeline surface is fixed on by acoustic emission sensor；
3) autofrettage pressure, sound-emission signal recording and analysis are applied
Pressurizeed after tested pipeline two ends are sealed, pressure release after pressurize 1min when being forced into 25MPa records the sound emission letter of this process
Number, observe this process acoustic emission signal figure；If there is the signal of below 50dB, it was demonstrated that Presence of an interface between fiber and resin matrix
Unsticking, segregation phenomenon, winding mass are poor；Rear removal acoustic emission sensor is completed, removal multiple tube completes sound emission inspection
Survey and the self-tightening process of pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156540.4A CN106841395A (en) | 2016-12-14 | 2016-12-14 | A kind of composite strengthens metallic conduit the cannot-harm-detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156540.4A CN106841395A (en) | 2016-12-14 | 2016-12-14 | A kind of composite strengthens metallic conduit the cannot-harm-detection device and method |
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| CN106841395A true CN106841395A (en) | 2017-06-13 |
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| CN201611156540.4A Pending CN106841395A (en) | 2016-12-14 | 2016-12-14 | A kind of composite strengthens metallic conduit the cannot-harm-detection device and method |
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Citations (6)
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| US4848159A (en) * | 1987-05-22 | 1989-07-18 | The Boeing Company | Ultrasonic inspection probe for laminated structures |
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| WO2011062695A1 (en) * | 2009-11-18 | 2011-05-26 | The Boeing Company | Strength measurement for bond lines |
| CN202002914U (en) * | 2010-12-28 | 2011-10-05 | 中国石油天然气股份有限公司 | Fixing device of acoustic emission sensor for corrosion detection of storage tank bottom plate |
| CN105784844A (en) * | 2016-03-03 | 2016-07-20 | 西安天力金属复合材料有限公司 | Device and method for detecting interface ultrasonic imaging of laminar metallic composite |
| CN105842342A (en) * | 2016-06-24 | 2016-08-10 | 爱德森（厦门）电子有限公司 | Device and method for detecting quality of metal composite material substrate surface covering layer |
-
2016
- 2016-12-14 CN CN201611156540.4A patent/CN106841395A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4848159A (en) * | 1987-05-22 | 1989-07-18 | The Boeing Company | Ultrasonic inspection probe for laminated structures |
| CN1168976A (en) * | 1996-03-28 | 1997-12-31 | 日本碍子株式会社 | Nondestructive measurement method of polymer insulator and apparatus for performing same |
| WO2011062695A1 (en) * | 2009-11-18 | 2011-05-26 | The Boeing Company | Strength measurement for bond lines |
| CN202002914U (en) * | 2010-12-28 | 2011-10-05 | 中国石油天然气股份有限公司 | Fixing device of acoustic emission sensor for corrosion detection of storage tank bottom plate |
| CN105784844A (en) * | 2016-03-03 | 2016-07-20 | 西安天力金属复合材料有限公司 | Device and method for detecting interface ultrasonic imaging of laminar metallic composite |
| CN105842342A (en) * | 2016-06-24 | 2016-08-10 | 爱德森（厦门）电子有限公司 | Device and method for detecting quality of metal composite material substrate surface covering layer |
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| Title |
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| 李伟等: "FRP 复合材料容器水压爆破声发射特性分析", 《压力容器》 * |
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Application publication date: 20170613 |