CN102393266A - Annular array energy transducer for pipeline axial residual stress detection based on critically refracted longitudinal wave method - Google Patents
Annular array energy transducer for pipeline axial residual stress detection based on critically refracted longitudinal wave method Download PDFInfo
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- CN102393266A CN102393266A CN2011102830446A CN201110283044A CN102393266A CN 102393266 A CN102393266 A CN 102393266A CN 2011102830446 A CN2011102830446 A CN 2011102830446A CN 201110283044 A CN201110283044 A CN 201110283044A CN 102393266 A CN102393266 A CN 102393266A
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Abstract
The invention relates to an annular array energy transducer for pipeline axial residual stress detection based on a critically refracted longitudinal wave method. A critically refracted longitudinal wave method is utilized to realize axial residual stress detection of a circumferential array of an annular pipeline; and a plurality of organic glass wedges are uniformly assembled and distributed at an inner ring of a fixed flexible sleeve. When the annular array energy transducer works, the fixed flexible sleeve is wound the circumference of the annular pipeline and is fastened; and a certain pretightening force is added according to the radius of the pipeline. Besides, a plurality of pairs of piezoelectric transducers are assembled in each of the organic glass wedge, so that an axial mode of one sending and one receiving is formed, wherein the mode has a property of equipartition with 360 degrees; and moreover, a first critical angle is formed between each of the energy transducer and a contact tangent plane of each of the organic glass wedge. According to the invention, on-line detection on annular pipelines with different radiuses is realized; and the annular array energy transducer has characteristics of high sensitivity and convenience for using and the like; besides, the annular array energy transducer is especially suitable for detection on some large petroleum transmission pipelines.
Description
One, technical field
The present invention relates to a kind of annular array transducer that detects based on the pipeline axial unrelieved stress of critical refraction longitudinal wave method.This device can be realized the online detection of circulating line, has characteristics such as highly sensitive, that use is efficiently convenient, is particularly suitable for the detection of some large-scale oil pipelines.
Two, background technology
Along with the development of World Oil Industry, pipeline run is increasing, and discharge pressure is also increasingly high, so improved the requirement of oil pipeline intensity is also corresponding.Spiral weld is the weak part of oil pipeline, because constraint and spot heating, the blockage effect of cooling and the changing factor of metal structure in the welding process make petroleum pipeline certainly lead to unrelieved stress.After oil pipeline comes into operation; The effect of all operation stress, unrelieved stress and superposition power that all spiral welds are produced in the time of all will standing the petroleum pipeline conveying medium; When weld seam has defective; Can quicken crackle and expand rapidly, cause the load-bearing capacity of oil pipeline, usability to descend, particularly the low-temperature brittle fracture to oil pipe has very big influence.The home and abroad has many pipeline sections example that oil pipe is torn suddenly during the hydraulic testing and usage, therefore causes relevant expert and engineering technical personnel's attention.The actual unrelieved stress of for this reason measuring oil pipeline is very necessary to the minimizing accident.
Traditional unrelieved stress that x-ray method is surveyed is the mean value of the unrelieved stress in the surperficial 10 μ m degree of depth, and the generation radiation is harmful.And boring method and stripping and slicing partition method detect unrelieved stress and all belong to and diminish detection; It is loaded down with trivial details that foil gauge is made stickup; This makes the online detection of large-scale pipeline stress receive great limitation; Therefore, research has high sensitivity, can detect the pipeline stress technique online, efficiently and have important practical significance.
Method recorded stress value when the critical refraction longitudinal wave method detected stress through sound, the mean stress value about can wavelength of the surface measurements degree of depth.But for large-scale long pipeline, this detection method efficient is too low.
And the annular array transducer that detects based on the pipeline axial unrelieved stress of critical refraction longitudinal wave method, can one-shot measurement along the axial stress value of the circumferential a plurality of points of pipeline, realize the online detection of stress efficiently.
Three, summary of the invention
The purpose of this invention is to provide a kind of annular array transducer that detects based on the pipeline axial unrelieved stress of critical refraction longitudinal wave method.Adopt some one one receipts patterns, solved the efficient detection problem of the stress of large-sized annular pipeline transducer (deciding) according to different pipeline radiuses.
The objective of the invention is to realize like this:
Through the accurate Calculation first critical angle, make transducer contact tangent plane with the organic glass voussoir and become the first critical angle assembling.Each organic glass voussoir adopts one one receipts pattern of small area of contact, and the two changeless whiles of transducer strict guarantee spacing of the inside assembling, one the one receipts pattern such along circumferential array is some right, is assembled in the fixing soft cover again.Opening that the top of soft cover is corresponding is some to circular hole, is convenient to emission line and reception line are drawn.
The invention has the advantages that: adopt a soft cover that plays fixation; Soft cover the inside is uniformly distributed with some to transducer along pipe circumference; And make every pair of transducer vertically distance in the organic glass voussoir keep fixing, like this can quick and convenient measurement along the circumferential axial stress field distribution of circulating line.And an end of fixing soft cover is equipped with 3 row's stress and buckles; The other end is opened 3 rounds of different distance according to pipeline radius difference; Like this can be according to the pipeline of different radii; The stress button is tipped in 3 rounds of different distance, can both be guaranteed constant pretightning force, make the concave station of all organic glass voussoir bottoms can contact fine then with pipeline.
Four, description of drawings
The sectional view of Fig. 1 piezoelectric transducer, the assembling of organic glass voussoir
1-circulating line 2-organic glass voussoir 3-piezoelectric transducer (emission)
4-fairlead 5-gib screw 6-fixes soft cover 7-piezoelectric transducer (reception)
Fig. 2 fixes soft cover three-dimensional plot
Fig. 3 transducer and organic glass voussoir assembling three-dimensional plot
Fig. 4 array energy transducer work three-dimensional plot
Five, embodiment
Following specific embodiments of the invention is elaborated:
Annular array transducer as shown in Figure 4 mainly comprises several sections such as fixing soft cover, piezoelectric transducer, organic glass voussoir, transmission line, screw.Adopt a soft cover that plays fixation; Soft cover inner ring has several step groove; Several are assembled to through screw in the step groove of soft cover by the organic glass voussoir of first critical angle assembling transducer, twine the soft cover of whole piece around circulating line again, will fix soft cover with tight locking button and be buckled in pipeline outer wall; Make so some can be corresponding one by one to transducer along circumferentially, and each organic glass voussoir can contact with pipeline outer wall well.
Fixing soft cover three-dimensional plot as shown in Figure 2, an end of fixing soft cover have the screw riveting to live a tight locking button, and the head of this tight locking button is drawn the parallel bayonet lock of 3 rows, can rotate around the stationary shaft of tight locking button head; The other end of fixing soft cover is corresponding opens a series of 3 rounds, can add certain pretightning force 3 row's bayonet locks are inserted in the 3 different rounds according to different pipeline radiuses like this, will fix soft cover well, be close to pipeline outer wall.
1, during actual measurement, because influences such as pipe surface smooth finish, roughness, pipeline has microdeformation, can cause that coupling situation in distorted area is relatively poor, and it is very big to survey error when causing.As shown in Figure 3; In the ultrasonic acoustic beam direction of propagation; Organic glass voussoir bottom processes a square concave surface, make the radius-of-curvature of the radius-of-curvature of concave surface near circulating line, and the concave surface area is larger than the area that acoustic beam is projected in the bottom surface; This can reduce voussoir and sheet material contact area under the prerequisite that does not influence ultrasonic acoustic energy beam, reduce the error that sheet deformation causes.
2, the steel bushing threaded hole of the Φ 8.5 on transducer and the organic glass voussoir cooperates, and is as shown in Figure 3.Wherein the angle of transducer axle center and organic glass voussoir bottom concave surface calculates according to first critical angle.
3, each organic glass voussoir is assembled to soft putting by 2 M3 screw retention, and is as shown in Figure 1.For preventing that axial and circumferential from collecting together, soft cover curls circulating line after one week, through 3 row's stress buttons in addition suitable pretightning force fasten, make concave surface each organic glass voussoir under pass through couplant well and combine with pipeline.
4,2 road grooves are opened in the outer ring of fixing soft cover, beat several circular holes in the per pass groove, and are relative with the connector lug of several transducers, are convenient to signal wire is drawn, as shown in Figure 2.
Claims (9)
1. annular array transducer that detects based on the pipeline axial unrelieved stress of critical refraction longitudinal wave method.This device mainly comprises several sections such as fixing soft cover, piezoelectric transducer, organic glass voussoir, transmission line, screw.
2. critical refraction longitudinal wave method according to claim 1 detects the annular array structure of unrelieved stress, it is characterized in that having some to piezoelectric transducer, and is installed to become 360 ° on the circulating line and be uniformly distributed with, and relative transducer is along circumferential centre distance 59mm.
3. fixing soft cover according to claim 1; It is characterized in that every organic glass voussoir that all can assemble a band transducer at a distance of 60mm both sides when open and flat; There is the threaded hole of 2 M3 at every place in order to fixing organic glass wedge piece, and there is 1 circular hole at top, every place in order to draw the signal wire of transducer.
4. fixing soft cover according to claim 3, its material have the characteristic of anticorrosion, anti-cracking, and have certain rigid, and characteristics such as little are wanted in plastic yield.
5. fixing soft cover according to claim 3, an end are equipped with 3 row's tight locking buttons, and the other end is opened 3 rounds of different distance series according to pipeline radius difference.
6. tight locking button according to claim 5, the head of this tight locking button are drawn the parallel bayonet lock of 3 rows, can rotate around the stationary shaft of tight locking button head, and that its material has is antirust, anticorrosion, rigidity is strong, density is light characteristics.
7. critical refraction longitudinal wave method according to claim 1 detects the annular array structure of unrelieved stress, and each transducer all becomes first critical angle with the tangent plane of the concave surface of organic glass voussoir.
8. according to the said organic glass voussoir of claim 3, there is the threaded hole of M3 to be used for fixing on its side and the top and puts soft, there is cavity inside with sealing glycerine, realizes the coupling between transducer and the organic glass.
9. annular array transducer architecture according to claim 1, the edge that can the detect circulating line apace axial stress of the some points of circle (logarithm that depends on transducer) that circumferentially distributes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102830446A CN102393266A (en) | 2011-09-22 | 2011-09-22 | Annular array energy transducer for pipeline axial residual stress detection based on critically refracted longitudinal wave method |
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| CN2011102830446A CN102393266A (en) | 2011-09-22 | 2011-09-22 | Annular array energy transducer for pipeline axial residual stress detection based on critically refracted longitudinal wave method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754820A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Ultrasonic transducer ring array based sound field synthesis and parallel operation device |
| WO2014082446A1 (en) * | 2012-11-29 | 2014-06-05 | 北京理工大学 | Sensor device and residual stress detection system employing same |
| CN104964095A (en) * | 2015-04-29 | 2015-10-07 | 北京安通伟业工程设备有限公司 | Q-stacking buckle |
| CN105606705A (en) * | 2016-01-05 | 2016-05-25 | 北京理工大学 | Ultrasonic nondestructive testing device for measuring circumferential residual stress of thin-tube surface layer |
| CN106813819A (en) * | 2017-04-05 | 2017-06-09 | 西南交通大学 | A kind of method that supercritical ultrasonics technology measures curve surface work pieces residual stress |
| CN106840503A (en) * | 2015-12-03 | 2017-06-13 | 基斯特勒控股公司 | Piezo-electric pressure sensor and the method for manufacturing this pressure sensor |
| CN110967138A (en) * | 2018-09-28 | 2020-04-07 | 罗斯蒙特公司 | Non-invasive process fluid pressure measurement system |
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- 2011-09-22 CN CN2011102830446A patent/CN102393266A/en active Pending
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014082446A1 (en) * | 2012-11-29 | 2014-06-05 | 北京理工大学 | Sensor device and residual stress detection system employing same |
| US9863826B2 (en) | 2012-11-29 | 2018-01-09 | Beijing Institute Of Technology | Sensor device and residual stress detection system employing same |
| CN103754820A (en) * | 2013-12-27 | 2014-04-30 | 浙江大学 | Ultrasonic transducer ring array based sound field synthesis and parallel operation device |
| CN103754820B (en) * | 2013-12-27 | 2015-11-25 | 浙江大学 | Based on sound field synthesis and the parallel operation device of ultrasonic transducer annular array |
| CN104964095A (en) * | 2015-04-29 | 2015-10-07 | 北京安通伟业工程设备有限公司 | Q-stacking buckle |
| CN106840503A (en) * | 2015-12-03 | 2017-06-13 | 基斯特勒控股公司 | Piezo-electric pressure sensor and the method for manufacturing this pressure sensor |
| CN105606705A (en) * | 2016-01-05 | 2016-05-25 | 北京理工大学 | Ultrasonic nondestructive testing device for measuring circumferential residual stress of thin-tube surface layer |
| CN105606705B (en) * | 2016-01-05 | 2021-11-02 | 北京理工大学 | Ultrasonic nondestructive testing device for measuring circumferential residual stress of thin tube surface layer |
| CN106813819A (en) * | 2017-04-05 | 2017-06-09 | 西南交通大学 | A kind of method that supercritical ultrasonics technology measures curve surface work pieces residual stress |
| CN110967138A (en) * | 2018-09-28 | 2020-04-07 | 罗斯蒙特公司 | Non-invasive process fluid pressure measurement system |
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Application publication date: 20120328 |