CN206557164U - A kind of weld joint ultrasonic detects transducer - Google Patents
A kind of weld joint ultrasonic detects transducer Download PDFInfo
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- CN206557164U CN206557164U CN201720202712.0U CN201720202712U CN206557164U CN 206557164 U CN206557164 U CN 206557164U CN 201720202712 U CN201720202712 U CN 201720202712U CN 206557164 U CN206557164 U CN 206557164U
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- weld joint
- transducer
- voussoir
- piezoelectric chip
- shell
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Abstract
Transducer is detected the utility model discloses a kind of weld joint ultrasonic, including：Shell, transducer cover plate, BNC connector, preceding absorbent treatment, back of the body absorbent treatment, piezoelectric chip and voussoir；The voussoir is arranged in the shell, and the preceding absorbent treatment is provided between the surrounding of the voussoir and the shell；The piezoelectric chip is fixed and is fitted on the inclined-plane of the voussoir, and the upper and lower surface of the piezoelectric chip is connected by wire with the BNC connector respectively；The BNC connector is arranged on the transducer cover plate, is connected with external equipment；The transducer cover plate is arranged on the cover top portion；The back of the body absorbent treatment is filled between the transducer cover plate and the piezoelectric chip；Weld joint ultrasonic detection transducer manipulation is easy, can realize the accurate unilateral detection to the bilateral weld seam of microsize original paper, and accuracy of detection is high, while detection speed is fast, greatly improves the detection efficiency to a large amount of microsize original paper weld seams.
Description
Technical field
The utility model is related to field of non destructive testing, particularly relates to a kind of weld joint ultrasonic detection transducer.
Background technology
The longtime running of station boiler practice have shown that, it is water-cooling wall to influence one of principal element of its long-term operation safety
Fin welding seam failure causes blowing out to rush to repair.Such as, certain power plant SG-2955/27.9-M530 types tower-type furnace the whole series start during due to
Leakage problem at spiral section water-cooling wall 37, causes Unit Commitment 14 times；Certain power plant two SG-3091/27.56-M54X types of second phase
Boiler, wherein No. 5 boilers are leaked 17 times after the water pressure test, No. 6 boilers are leaked 3 times after the water pressure test.Such problem,
The highest attention of power industry is caused.Following 10-15, will be the high-incidence season of station boiler interruption of service.Therefore, it is effective
The weld defect of water-cooling wall of power boiler fin is detected, for its fin weld seam feature, the effective special Non-Destructive Testing skill of research
Art is extremely important.At present, water-cooling wall of power boiler largely adds the bond pattern of band steel using light pipe, and this structure is not complete penetraction and fusion in welding
Angle welding form, because the angle welding does not bear boiler internal pressure directly, in manufacture and fixing link, water cooling tube wall fin fillet welding
Seam detection is not paid attention to；Simultaneously because the structural particularity of water-cooling wall fin, conventional Ultrasound detection can not be to fin
Angle welding carries out effective carrying out flaw detection.
Utility model content
In view of this, the purpose of this utility model is to propose a kind of weld joint ultrasonic detection transducer, being capable of technicality
Ground carries out Non-Destructive Testing to the angle welding of water-cooling wall fin, while the bilateral weld defect of the water-cooling wall fin can be realized
Unilateral detection.
Transducer is detected based on a kind of weld joint ultrasonic that above-mentioned purpose the utility model is provided, including：Shell, transducer
Cover plate, BNC connector, preceding absorbent treatment, back of the body absorbent treatment, piezoelectric chip and voussoir；The shell is hollow bottomless cylinder, the voussoir
It is arranged in the shell, the preceding absorbent treatment is provided between the surrounding of the voussoir and the shell；The piezoelectric chip leads to
Cross epoxide-resin glue fix be fitted on the inclined-plane of the voussoir, and the piezoelectric chip upper and lower surface respectively by wire with
The BNC connector is connected；The BNC connector is arranged on the transducer cover plate, is connected with external equipment；The transducer
Cover plate is arranged on the cover top portion；The back of the body absorbent treatment is filled between the transducer cover plate and the piezoelectric chip；It is described
The bottom of voussoir is concordant with the bottom of the shell, constitutes the bottom surface that a kind of weld joint ultrasonic detects transducer, the bottom
Face fits to form coupled interface with detected materials surface, is coupled between the bottom surface and the detected materials surface by couplant.
The side of the voussoir is vertical with horizontal bottom, and the angle of inclined-plane and horizontal bottom is α, and the angle α meets the
One critical angle, that is, cause the ultrasonic wave for entering detected materials only to include shear component, according to the inspection of the detected materials of unlike material
Survey demand, can be set the voussoir with different α angles.
Preferably, the height of the voussoir is set to, and the ultrasonic wave reflected by the coupled interface can be made not pressed
The height of electric wafer receipt.
The preceding absorbent treatment and the back of the body absorbent treatment are constituted using the mixture of tungsten powder and epoxy resin.
Preferably, the weight ratio of tungsten powder and epoxy resin is 4 in the preceding absorbent treatment and the back of the body absorbent treatment:1.
Preferably, the preceding absorbent treatment thickness is 1-2mm, and the back of the body absorbent treatment thickness is 8-10mm.
Preferably, the piezoelectric chip is rectangle, and the width of the piezoelectric chip is 4mm.
Detect that transducer, relative to the horizontal level of weld seam, can be realized to double by adjusting a kind of weld joint ultrasonic
The unilateral detection of weld seam described in side.
Preferably, the shell is rectangular aluminium alloy shell.
Preferably, the piezoelectric chip is rectangle composite piezoelectric chip.
A kind of weld joint ultrasonic detection transducer designs that the utility model is provided are exquisite, easy to operate, can realize pair
The accurate unilateral detection of the bilateral weld seam of microsize original paper, accuracy of detection is high, can effectively detect in microsize weld seam
Defect, excludes the hidden danger caused by some weld defects；Detection speed is fast simultaneously, efficiency high, greatly improves to a large amount of small
The detection efficiency of size original paper weld seam.
Brief description of the drawings
Fig. 1 is a kind of weld joint ultrasonic detection transducer of the utility model and water cooling tube diametric plane parallel section structure chart；
Fig. 2 is a kind of weld joint ultrasonic detection transducer of the utility model and water cooling tube diametric plane vertical section structure chart；
Fig. 3 is that a kind of weld joint ultrasonic of the utility model embodiment 1 detects the schematic diagram of transducer step one；
Fig. 4 is that a kind of weld joint ultrasonic of the utility model embodiment 1 detects the schematic diagram of transducer step two；
Fig. 5 is that a kind of weld joint ultrasonic of the utility model embodiment 1 detects transducer along fin length direction working method
Schematic diagram.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to the drawings, the utility model is further described.
As shown in figure 1, being a kind of weld joint ultrasonic detection transducer of the utility model and water cooling tube diametric plane parallel section knot
Composition；As shown in Fig. 2 being a kind of weld joint ultrasonic detection transducer of the utility model and water cooling tube diametric plane vertical section structure
Figure.A kind of weld joint ultrasonic detection transducer of the utility model includes：Shell 6, transducer cover plate 1, BNC (Bayonet Nut
Connector, snap-fit connector) plug 7, preceding absorbent treatment 2, back of the body absorbent treatment 5, piezoelectric chip 4 and voussoir 3.Shell 6 is
Hollow bottomless cylinder, voussoir 3 is arranged in shell 6, and preceding absorbent treatment 2 is provided between the surrounding and shell 6 of voussoir 3；Piezo crystals
Piece 4 by epoxide-resin glue fix be fitted on the inclined-plane of voussoir 3, and piezoelectric chip 4 upper and lower surface respectively by wire with
BNC connector 7 is connected；BNC connector 7 is arranged on transducer cover plate 1, is connected with external equipment；Transducer cover plate 1 is installed outside
The top of shell 6；Filled with back of the body absorbent treatment 5 between transducer cover plate 1 and piezoelectric chip 4；The bottom of voussoir 3 is concordant with the bottom of shell 6, constitutes
A kind of weld joint ultrasonic detects the bottom surface of transducer, and the bottom surface fits to form coupled interface with detected materials surface, institute
State and coupled between bottom surface and the detected materials surface by couplant.
The side of voussoir 3 is vertical with horizontal bottom, and the angle of inclined-plane and horizontal bottom is α, the angle α that is, ultrasonic wave
Incidence angle on detected materials surface.The angle α meets first critical angle, that is, the ultrasonic wave for entering detected materials is only wrapped
Containing shear component, be conducive to the detection of tiny defect in detected materials., can according to the detection demand of the detected materials of unlike material
Voussoir 3 with different α angles is set.
The height of voussoir 3 has particular design so that shear component in the ultrasonic wave reflected by the coupled interface without
Method is received by piezoelectric chip, it is to avoid the harmful effect that the ultrasonic wave of the coupling surface reflection is produced to testing result；Due to ultrasound
The angle of reflection of compressional component in ripple is more than the angle of reflection of the shear component, therefore when the shear component can not be tied to detection
When fruit produces influence, the compressional component can not produce influence to testing result naturally.
The piezo-electric crystal is used to produce detection ultrasonic wave, and the echo-signal that weld seam reflects is converted into electric signal,
As shown in figure 1, the width (along the bevel direction of voussoir 3) of piezoelectric chip 4 is if too wide, a kind of weld joint ultrasonic during detection
Detect that the left and right adjustment distance of transducer is limited, it is impossible to complete the unilateral detection of bilateral weld seam；If width is narrow, piezoelectric chip
4 can not obtain enough echo acoustic energy, it is impossible to detect effective echo-signal.Preferably, the width of piezoelectric chip 4 is (along wedge
The bevel direction of block 3) it is set to 4mm；As shown in Fig. 2 the length (in the horizontal direction) of the piezo-electric crystal is by the piezo crystals
The width decision of the area of body and the piezo-electric crystal, wherein, the near field length of the area and detection shear wave of the piezo-electric crystal
It is relevant, it can be configured according to actual needs.
Preceding absorbent treatment 2 and back of the body absorbent treatment 5 are constituted using the mixture of tungsten powder and epoxy resin, are had well to ultrasonic wave
Assimilation effect, can effectively absorb the interference ripple produced during work, eliminate influence of the interference ripple to echo, improve accuracy of detection.
The preceding thickness of absorbent treatment 2 is 1-2mm, and back of the body absorbent treatment 5 thickness is 8-10mm.
Preferably, the tungsten powder and the epoxy resin are with 4:1 weight is than mixing.
BNC connector 7 is used to be connected with external equipment, receives the detection signal sent by external equipment and is transferred to piezoelectric chip
4, piezoelectric chip 4 is produced ultrasonic wave；The echo-signal that piezoelectric chip 4 is passed back is received simultaneously, and is exported to external equipment.
Embodiment 1：
As shown in figure 3, detecting the schematic diagram of transducer step one for a kind of weld joint ultrasonic of the utility model embodiment 1；Such as
It is a kind of weld joint ultrasonic of the utility model embodiment 1 detection schematic diagram of transducer step two shown in Fig. 4；As shown in figure 5, being
A kind of weld joint ultrasonic of the utility model embodiment 1 detects transducer along fin length direction working method schematic diagram.This practicality
A kind of weld joint ultrasonic of new embodiment 1 detection transducer uses polysulfone plastic voussoir, rectangle composite piezoelectric chip and aluminium
Alloy rectangular enclosure；During work, a kind of weld joint ultrasonic detection transducer that the utility model embodiment 1 is provided is arranged on water
A kind of side of the fin 8 of cold pipe, described weld joint ultrasonic detects transducer with being coupled between the fin using glycerine, BNC
Plug 7 is connected with external equipment, by two steps, realizes the unilateral detection to fin bilateral weld seam：
Step one, the position that a kind of weld joint ultrasonic detects transducer is adjusted so that produced by the piezo-electric crystal
Ultrasonic wave inject the coupled interface in side weld, and the piezo-electric crystal can receive it is described to the anti-of side weld
Ripple is emitted back towards, is completed to the ultrasound examination to side weld；
Step 2, moves horizontally a kind of weld joint ultrasonic to the direction away from weld seam and detects transducer so that by institute
The ultrasonic wave for stating piezo-electric crystal generation is injected in the weld seam of coupled interface side after the reflection of the contralateral surface of the fin, and
The piezo-electric crystal can receive the reflection echo of the weld seam of the coupled interface side, complete to the coupled interface side
Weld seam detection.
Single coupling surface inspection is carried out to the water cooling tube fin of water-cooling wall using a kind of weld joint ultrasonic detection transducer
It can be only that the weld seam of the fin is accurately and effectively detected in 15mm long and narrow detection space in width during survey, lack
The wave amplitude for falling into echo is higher by more than noise 6dB, and detection efficiency is high, and accuracy rate is high.
From the above it can be seen that a kind of weld joint ultrasonic detection transducer designs that the utility model is provided are exquisite,
It is easy to operate, the accurate unilateral detection to the bilateral weld seam of microsize original paper can be realized, accuracy of detection is high, can effectively examine
The defect gone out in microsize weld seam, excludes the hidden danger caused by some weld defects；Detection speed is fast simultaneously, efficiency high, greatly
The big detection efficiency improved to a large amount of microsize original paper weld seams.
Those of ordinary skills in the art should understand that：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the present utility model, the above is real
Applying can also be combined between the technical characteristic in example or non-be the same as Example, and exist as described above of the present utility model
Many other changes of different aspect, for simplicity, they are provided not in details.Therefore, it is all in spirit of the present utility model
Within principle, any omission, modification, equivalent substitution, improvement for being made etc. should be included in protection domain of the present utility model
Within.
Claims (9)
1. a kind of weld joint ultrasonic detects transducer, it is characterised in that including：Shell, transducer cover plate, BNC connector, preceding sound absorption
Layer, back of the body absorbent treatment, piezoelectric chip and voussoir；The shell is hollow bottomless cylinder, and the voussoir is arranged in the shell, institute
State and the preceding absorbent treatment is provided between the surrounding of voussoir and the shell；The piezoelectric chip is fixed by epoxide-resin glue and fitted
On the inclined-plane of the voussoir, and the upper and lower surface of the piezoelectric chip is connected by wire with the BNC connector respectively；Institute
State BNC connector to be arranged on the transducer cover plate, be connected with external equipment；The transducer cover plate is arranged on the shell top
Portion；The back of the body absorbent treatment is filled between the transducer cover plate and the piezoelectric chip；The bottom of the voussoir and the shell
Bottom it is concordant, constitute the bottom surface that a kind of weld joint ultrasonic detects transducer, the bottom surface is fitted with detected materials surface
Coupled interface is formed, is coupled between the bottom surface and the detected materials surface by couplant.
2. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the side of the voussoir with
Horizontal bottom is vertical, and the angle of inclined-plane and horizontal bottom is α, and the angle α meets first critical angle, that is, to enter and wait to measure and monitor the growth of standing timber
The ultrasonic wave of material only includes shear component, according to the detection demand of the detected materials of unlike material, and can be set has different α angles
The voussoir.
3. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the height of the voussoir is set
It is set to, the height that the ultrasonic wave reflected by the coupled interface can be made can not to be received by piezoelectric chip.
4. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the preceding absorbent treatment and institute
Back of the body absorbent treatment is stated to constitute using the mixture of tungsten powder and epoxy resin.
5. a kind of weld joint ultrasonic detection transducer according to claim 4, it is characterised in that the preceding absorbent treatment thickness
For 1-2mm, the back of the body absorbent treatment thickness is 8-10mm.
6. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the piezoelectric chip is square
Shape, the width of the piezoelectric chip is 4mm.
7. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that by adjusting described one kind
Weld joint ultrasonic detects that transducer, relative to the horizontal level of weld seam, can realize the unilateral detection to weld seam described in bilateral.
8. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the shell is rectangular aluminum
Alloy shell.
9. a kind of weld joint ultrasonic detection transducer according to claim 1, it is characterised in that the piezoelectric chip is square
Shape composite piezoelectric chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202712.0U CN206557164U (en) | 2017-03-03 | 2017-03-03 | A kind of weld joint ultrasonic detects transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202712.0U CN206557164U (en) | 2017-03-03 | 2017-03-03 | A kind of weld joint ultrasonic detects transducer |
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| Publication Number | Publication Date |
|---|---|
| CN206557164U true CN206557164U (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720202712.0U Active CN206557164U (en) | 2017-03-03 | 2017-03-03 | A kind of weld joint ultrasonic detects transducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212026A (en) * | 2018-09-25 | 2019-01-15 | 合肥工业大学 | A kind of solid sound detection device based on surface wave |
| CN110057913A (en) * | 2019-05-27 | 2019-07-26 | 上海市特种设备监督检验技术研究院 | A kind of horizontal shear wave transducer for coarse grain material weld seam detection |
-
2017
- 2017-03-03 CN CN201720202712.0U patent/CN206557164U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212026A (en) * | 2018-09-25 | 2019-01-15 | 合肥工业大学 | A kind of solid sound detection device based on surface wave |
| CN109212026B (en) * | 2018-09-25 | 2021-06-04 | 合肥工业大学 | Surface wave-based structure-borne sound detection device |
| CN110057913A (en) * | 2019-05-27 | 2019-07-26 | 上海市特种设备监督检验技术研究院 | A kind of horizontal shear wave transducer for coarse grain material weld seam detection |
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