CN101672828A - Nozzle used for water-spray ultrasonic nondestructive testing - Google Patents
Nozzle used for water-spray ultrasonic nondestructive testing Download PDFInfo
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- CN101672828A CN101672828A CN200910235210A CN200910235210A CN101672828A CN 101672828 A CN101672828 A CN 101672828A CN 200910235210 A CN200910235210 A CN 200910235210A CN 200910235210 A CN200910235210 A CN 200910235210A CN 101672828 A CN101672828 A CN 101672828A
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Abstract
The invention relates to a nozzle used for water-spray ultrasonic nondestructive testing, belonging to the technical field of ultrasonic nondestructive testing. The invention is characterized in thatthe nozzle is symmetrically arranged along the central line of a water column except the structure of a nipple; a water inlet tap is connected with a nozzle body by screw thread; a probe end cap and the nozzle body adopt the rapid assembling structures; the nipple is connected with the nozzle body by screw thread; an annular water sieve used for isolation is arranged in the nozzle body, one side of the annular water sieve is provided with a water filling chamber communicated with the water inlet cap, and the other side thereof is provided with an overflowing inclined plane and a flow channel;sieve pores are fully distributed on the annular water sieve, wherein the diameter of a single sieve pore is less than 2mm, and the area sum of the overflowing cross sections of the annular water sieve is over three times than the sectional area of the flow channel; the inner ring of the annular water sieve is used for a probe to pass, and the probe end cap and the probe are fixed in an interference fit way. In the invention, when the upward spray distance of the designed nozzle is more than 300mm, the water column can still keep the laminar flow mode; therefore, most requirements of the water-spray ultrasonic nondestructive testing can be met.
Description
Technical field:
The invention belongs to the Ultrasonic Nondestructive technical field, relate to a kind of nozzle that sprays stationary flow, be used for material or hyperacoustic conduction of member Ultrasonic NDT and coupling, be particularly suitable for the detection of composite element.
Background technology:
UT (Ultrasonic Testing) is most widely used a kind of in the first five lossless detection method greatly commonly used, can be used for detecting the defectives such as layering, pore, binding deficient and snotter in the composite element.Ultrasound examination need use couplant to conduct ultrasound wave between ultrasonic generator and measured workpiece, and coupling agent commonly used comprises water, glycerine, total loss system wet goods.In order to realize the robotization of Ultrasonic NDT, early stage checkout equipment need be submerged in detected workpiece in the coupling liquid.In recent years, in order to carry out the automatic detection of large-scale three dimensional composite element, the water-spray ultrasonic characterization processes occurred, the coupling by water column realizes hyperacoustic conduction, the inconvenience of having avoided the water logging detection method to bring.
The water-spray ultrasonic detection needs one and can spray the nozzle of stablizing water column, by water column UNICOM ultrasonic generator and measured workpiece.When water column mobile becomes the non-laminar flow pattern, the shape of water column and destroy integrity, the ultrasound wave sound field becomes disorderly in the water column, and ultrasonic energy can not keep assembling.In addition, the water column of non-laminar flow can cause the amount of droplets of workpiece reflected back to increase, and drop bump water column causes liquid stream disorderly, has more increased the uncertainty of sound field.Therefore, when flowing of water column was the non-laminar flow pattern, the hyperacoustic signal to noise ratio (S/N ratio) of transmission obviously descended in the water column.
Distance between nozzle and workpiece is called the water column jet length.Water column can cause hyperacoustic decay, in order to improve the signal to noise ratio (S/N ratio) of Ultrasonic Detection, should adopt little jet length.But in some specific structures, such as the flange that comprises protrusion in the member, stiffening rib or other structural support, jet length must increase.For the signal to noise ratio (S/N ratio) that guarantees to detect, must guarantee that in bigger jet length, the laminar flow pattern of water column can not change.
According to the achievement in research of Reynolds, whether the water column of nozzle ejection is that laminar flow pattern depends on flow velocity to a great extent.When flow velocity increases, keep the minimum jet length of laminar flow to reduce.For the water column that makes the nozzle ejection can guarantee the ultrasound wave good signal-to-noise in jet length, flow velocity must be enough little.But when flow velocity was too small, if adopt the horizontal-jet characterization processes, water column can be sagging under the effect of gravity.The workpiece position that causes calculating in the workpiece position of actual detected and the automatic ultrasonic detection system there are differences, and this situation is even more serious when the surface of the work profile variations.
Find that through retrieval United States Patent (USP) (patent No. 5431342) has designed a kind of nozzle that is used for the water-spray ultrasonic Non-Destructive Testing, but this nozzle is made of the structure more complicated 12 parts.The purpose of this patent is to design the more simple nozzle of a kind of structure, and guarantees that water column is in laminar flow pattern under certain water-jet velocity and water column rigidity.
Summary of the invention:
Therefore, the objective of the invention is to, design the more simple nozzle of a kind of structure, be implemented in the laminar flow pattern that guarantees water column under certain water-jet velocity and the water column rigidity, satisfy the needs of water-spray ultrasonic Non-Destructive Testing.
This device contains: ozzle (8), nozzle body (9), water inlet tap (11), probe end cap (10) and probe (12) is characterized in that described ozzle (8), nozzle body (9) and probe end cap (10) are along water column center line symmetric arrangement; Described water inlet tap (11) is positioned at nozzle body (9) top, is connected with nozzle body (9) by screw thread; Described probe end cap (10) and nozzle body (9) adopt quick package assembly; Between described ozzle (8) and the nozzle body (9) by being threaded; There is the annular water sieve (4) of an isolation usefulness described nozzle body (9) inside, and a side of this annular water sieve (4) is water-filling chamber (6), and described water-filling chamber (6) is communicated with water inlet tap, and the opposite side of described annular water sieve (4) is overcurrent inclined-plane (3) and runner (2); Be covered with sieve aperture on the described annular water sieve (4), the diameter of single sieve aperture is less than 2mm, and the flow section area sum of annular water sieve (4) is greater than 3 times of runner (2) sectional area, the interior ring of annular water sieve (4) passes through for probe (12), and described probe end cap (10) and probe (12) are fixed by interference fit.
Sieve aperture on the described annular water sieve (4) evenly distributes along the water sieve center.
The inside surface of described runner (2) and overcurrent inclined-plane (3) adopts grinding technics to handle.
The length of described runner (2) is greater than 3 times of flow diameter.
Pass through the cambered surface transition between described overcurrent inclined-plane (3) and runner (2) wall.
Described overcurrent inclined-plane (3) is 35～40 degree with the angle of water column center line.
Test shows: the nozzle that the present invention is designed, water column still can keep laminar flow pattern (the easiest maintenance of laminar flow pattern of water spray downwards when upwards jet length is greater than 300mm, upwards water spray then is not easy to keep), can satisfy most demands of water-spray ultrasonic Non-Destructive Testing.
Description of drawings:
The nozzle assembling synoptic diagram of Fig. 1 embodiment of the invention;
The structural representation of Fig. 2 nozzle body and A-A cut-open view;
Fig. 3 nozzle is used for the synoptic diagram that the three-dimensional structure through transmission technique detects;
Ultrasonic type measured drawing when Fig. 4 sprays water detection.
Wherein: the 1-water column; The 2-runner; The 3-inclined-plane; 4-annular water sieve; The 5-sieve aperture; 6-water-filling chamber; The 7-O-ring seal; The 8-ozzle; The 9-nozzle body; The 10-end cap of popping one's head in; The 11-water inlet tap; The 12-probe; 13-ultrasonic probe and nozzle; The tested workpiece of 14-; 15-multiple degrees of freedom probe clamper; 16-detects frock; 17-scanning frame.
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention.
Shown in Figure 1 is the assembling synoptic diagram of nozzle of the present invention, and except that water inlet tap 11, structurally along water column 1 center line symmetric arrangement, this structure guarantees the laminar flow pattern of water column to whole nozzle easily.
Probe end cap 10 and probe 12 modes by interference fit are fixed together, and probe end cap 10 adopts quick package assembly with being connected of nozzle body 9, only need during connection probe end cap 10 and nozzle body 9 alignment are depressed and rotate 30 and spend and get final product.This frame mode has not only guaranteed the convenience that probe is changed, and the more important thing is the winding of probe replacing can not causing probe wire.The sealing of probe end cap 10 and nozzle body 9 guarantees by O type circle 7.
Water inlet tap of the present invention can be selected the brass water nozzle of standard for use; Preferably, other member of nozzle of the present invention adopts the organic glass manufacturing of soft.
Figure 2 shows that the structural representation of nozzle body 9, enter 6 backs, water-filling chamber from the current of water inlet tap 11 and will inevitably produce rotation and turbulent flow because of flowing to change, for the water column 1 that guarantees nozzle ejection is in laminar flow pattern, should avoid the influence of the rotation of current in the water-filling chamber 6 and transversal wave movement to water column 1.Therefore the present invention adopts water sieve 4 that water-filling chamber 6 and runner 2 are isolated, and only enters ozzle 8 with longitudinal velocity to guarantee current.The flow section area sum of water sieve 4 should be greater than long-pending 3 times of cross section of fluid channel, and the diameter of single sieve aperture should be less than 2mm.
If get back to detecting head surface again after one or several structural plane reflection of probe ultrasonic waves transmitted through nozzle, then can produce false ultrasound information, it can reduce hyperacoustic signal to noise ratio (S/N ratio) of carrying effective test data.Cause interference in order to prevent that the structure of nozzle echo from detecting the ultrasonic reflection method, inclined-plane 3 is spent 35～40 with the angle design of water column 1 center line.If this angle is about 45 degree, the ultrasonic waves transmitted of then popping one's head in is through two secondary reflections on inclined-plane 3, and the part ultrasonic energy is got back to probe again, forms structural return; If this angle is about 30 degree, the ultrasonic waves transmitted of then popping one's head in is through the triple reflection on inclined-plane 3, and the part ultrasonic energy also can be got back to probe, forms structural return.When the angle of inclined-plane 3 and water column 1 center line was between 35～40 degree, the structural return that transmitting probe is received can be ignored.
What laminar flow can reduce that the water column striking work produces splashes, when water column 1 upwards, obliquely upward or during horizontal-jet, this structure decrease be reflected back toward the water droplet quantity of water column.Because the water droplet of bump can produce ultrasonic undesired signal, reduce signal to noise ratio (S/N ratio), can further improve the signal to noise ratio (S/N ratio) of Ultrasonic Detection with this structure.
For example, if the diameter of water-filling chamber is 36mm, the total area of sieve aperture is about 500mm
2, the diameter of runner is 6mm, when flow velocity was 6 liters/minute, vertical jet length was acceptable at 200mm with interior signal to noise ratio (S/N ratio).
Figure 3 shows that nozzle is used for the synoptic diagram that three-dimensional composite material member through transmission technique detects.Figure 4 shows that the ultrasonic type measured drawing when detecting.As can be seen from Figure 4, transmitting probe was not received any structure of nozzle echo before receiving the boundary wave of tested material.
The device that the present invention proposes has following features:
(1) simple in structure. Except ultrasonic probe, nozzle of the present invention only is made of 4 critical pieces: ozzle, nozzle are originally Body, water inlet tap and probe end cap.
(2) probe is changed conveniently. Ultrasonic probe is connected connection and is adopted quick structure for assembling with nozzle, only need sound end during installation Lid and nozzle body alignment are depressed and are rotated 30 degree and get final product. Not only guaranteed the convenience that probe is changed, heavier What want is that probe is changed the winding that can not cause probe wire.
(3) be applicable to the water column of multiple diameter. Have the ozzle of different-diameter runner by replacing, can spray different-diameter Water column, be applicable to different accuracy of detection and carry out different characterization processes Experiment Parameters.
Claims (6)
1, a kind of nozzle that is used for the water-spray ultrasonic Non-Destructive Testing, contain ozzle (8), nozzle body (9), water inlet tap (11), probe end cap (10) and probe (12), it is characterized in that described ozzle (8), nozzle body (9) and probe end cap (10) are along water column center line symmetric arrangement; Described water inlet tap (11) is positioned at nozzle body (9) top, is connected with nozzle body (9) by screw thread; Described probe end cap (10) and nozzle body (9) adopt quick package assembly; Between described ozzle (8) and the nozzle body (9) by being threaded; There is the annular water sieve (4) of an isolation usefulness described nozzle body (9) inside, and a side of this annular water sieve (4) is water-filling chamber (6), and described water-filling chamber (6) is communicated with water inlet tap, and the opposite side of described annular water sieve (4) is overcurrent inclined-plane (3) and runner (2); Be covered with sieve aperture on the described annular water sieve (4), the diameter of single sieve aperture is less than 2mm, and the flow section area sum of annular water sieve (4) is greater than 3 times of runner (2) sectional area, the interior ring of annular water sieve (4) passes through for probe (12), and described probe end cap (10) and probe (12) are fixed by interference fit.
2, the nozzle that is used for the water-spray ultrasonic Non-Destructive Testing as claimed in claim 1 is characterized in that, the sieve aperture on the described annular water sieve (4) evenly distributes along the water sieve center.
3, the nozzle that is used for the water-spray ultrasonic Non-Destructive Testing as claimed in claim 1 is characterized in that, the inside surface of described runner (2) and overcurrent inclined-plane (3) adopts grinding technics to handle.
4, the nozzle that is used for the water-spray ultrasonic Non-Destructive Testing as claimed in claim 1 is characterized in that, the length of described runner (2) is greater than 3 times of flow diameter.
5, the nozzle that is used for the water-spray ultrasonic Non-Destructive Testing as claimed in claim 1 is characterized in that, passes through the cambered surface transition between described overcurrent inclined-plane (3) and runner (2) wall.
6, the nozzle that is used for the water-spray ultrasonic Non-Destructive Testing as claimed in claim 1 is characterized in that, described overcurrent inclined-plane (3) is 35～40 degree with the angle of water column center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102352108A CN101672828B (en) | 2009-10-16 | 2009-10-16 | Nozzle used for water-spray ultrasonic nondestructive testing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102352108A CN101672828B (en) | 2009-10-16 | 2009-10-16 | Nozzle used for water-spray ultrasonic nondestructive testing |
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| Publication Number | Publication Date |
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| CN101672828A true CN101672828A (en) | 2010-03-17 |
| CN101672828B CN101672828B (en) | 2011-05-11 |
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| CN2009102352108A Expired - Fee Related CN101672828B (en) | 2009-10-16 | 2009-10-16 | Nozzle used for water-spray ultrasonic nondestructive testing |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147748A (en) * | 2013-03-19 | 2013-06-12 | 中国水电顾问集团中南勘测设计研究院 | Downwards-opened drilling acoustic wave test water plugging device |
| CN103962890A (en) * | 2014-04-30 | 2014-08-06 | 大连理工大学 | Jet flow immersion ultrasonic detecting method and liquid sprayer |
| CN104677992A (en) * | 2015-03-06 | 2015-06-03 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic detection device and detection method for electron beam welding lines of airplane frame beam structure |
| CN105642491A (en) * | 2016-01-04 | 2016-06-08 | 沈阳化工大学 | Ultrasonic probe liquid immersion coupling liquid sprayer |
| CN106198736A (en) * | 2016-08-30 | 2016-12-07 | 山东钢铁股份有限公司 | A kind of steel-plate ultrasound wave inspection instrument |
| CN106568391A (en) * | 2016-07-14 | 2017-04-19 | 吉林大学 | Turbo blade ultrasonic nondestructive testing system |
| CN106770649A (en) * | 2016-11-22 | 2017-05-31 | 江西昌河航空工业有限公司 | A kind of adjustable water spray penetration ultrasonic testing system |
| CN107876230A (en) * | 2017-11-29 | 2018-04-06 | 九牧厨卫股份有限公司 | One kind swings water water core and discharging device |
| CN111318386A (en) * | 2020-03-31 | 2020-06-23 | 奥瑞视（北京）科技有限公司 | Liquid sprayer for local liquid immersion ultrasonic detection |
| CN112578026A (en) * | 2020-12-10 | 2021-03-30 | 重庆电子工程职业学院 | Fixing device of acoustic emission sensor |
| CN112881531A (en) * | 2020-11-19 | 2021-06-01 | 北京工业大学 | Spray head clamp based on water spraying type ultrasonic detection means |
| CN113340999A (en) * | 2021-07-12 | 2021-09-03 | 宁夏大学 | Ultrasonic C-scan water spray coupling laminar flow generation nozzle |
| CN113655128A (en) * | 2021-07-30 | 2021-11-16 | 中国航空工业集团公司济南特种结构研究所 | Probe zero angle checking method of penetration method ultrasonic C scanning detection system |
-
2009
- 2009-10-16 CN CN2009102352108A patent/CN101672828B/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147748A (en) * | 2013-03-19 | 2013-06-12 | 中国水电顾问集团中南勘测设计研究院 | Downwards-opened drilling acoustic wave test water plugging device |
| CN103962890A (en) * | 2014-04-30 | 2014-08-06 | 大连理工大学 | Jet flow immersion ultrasonic detecting method and liquid sprayer |
| CN103962890B (en) * | 2014-04-30 | 2015-12-30 | 大连理工大学 | A kind of jet flow immersion supersonic detection method and bubbler |
| CN104677992A (en) * | 2015-03-06 | 2015-06-03 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic detection device and detection method for electron beam welding lines of airplane frame beam structure |
| CN105642491A (en) * | 2016-01-04 | 2016-06-08 | 沈阳化工大学 | Ultrasonic probe liquid immersion coupling liquid sprayer |
| CN106568391A (en) * | 2016-07-14 | 2017-04-19 | 吉林大学 | Turbo blade ultrasonic nondestructive testing system |
| CN106198736A (en) * | 2016-08-30 | 2016-12-07 | 山东钢铁股份有限公司 | A kind of steel-plate ultrasound wave inspection instrument |
| CN106770649A (en) * | 2016-11-22 | 2017-05-31 | 江西昌河航空工业有限公司 | A kind of adjustable water spray penetration ultrasonic testing system |
| CN107876230A (en) * | 2017-11-29 | 2018-04-06 | 九牧厨卫股份有限公司 | One kind swings water water core and discharging device |
| CN111318386A (en) * | 2020-03-31 | 2020-06-23 | 奥瑞视（北京）科技有限公司 | Liquid sprayer for local liquid immersion ultrasonic detection |
| CN112881531A (en) * | 2020-11-19 | 2021-06-01 | 北京工业大学 | Spray head clamp based on water spraying type ultrasonic detection means |
| CN112881531B (en) * | 2020-11-19 | 2024-05-03 | 北京工业大学 | Spray nozzle clamp based on water spray type ultrasonic detection means |
| CN112578026A (en) * | 2020-12-10 | 2021-03-30 | 重庆电子工程职业学院 | Fixing device of acoustic emission sensor |
| CN112578026B (en) * | 2020-12-10 | 2023-10-20 | 重庆电子工程职业学院 | Fixing device of acoustic emission sensor |
| CN113340999A (en) * | 2021-07-12 | 2021-09-03 | 宁夏大学 | Ultrasonic C-scan water spray coupling laminar flow generation nozzle |
| CN113655128A (en) * | 2021-07-30 | 2021-11-16 | 中国航空工业集团公司济南特种结构研究所 | Probe zero angle checking method of penetration method ultrasonic C scanning detection system |
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| CN101672828B (en) | 2011-05-11 |
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Granted publication date: 20110511 Termination date: 20121016 |