CN201242540Y - Special-purpose transducer for ultrasonic detection of polyethylene pipe weld joint - Google Patents
Special-purpose transducer for ultrasonic detection of polyethylene pipe weld joint Download PDFInfo
- Publication number
- CN201242540Y CN201242540Y CNU2008200351436U CN200820035143U CN201242540Y CN 201242540 Y CN201242540 Y CN 201242540Y CN U2008200351436 U CNU2008200351436 U CN U2008200351436U CN 200820035143 U CN200820035143 U CN 200820035143U CN 201242540 Y CN201242540 Y CN 201242540Y
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- Prior art keywords
- delay block
- binding post
- block
- ultrasonic detection
- special
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- Expired - Fee Related
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- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 229920000573 polyethylene Polymers 0.000 title claims description 16
- 239000004698 Polyethylene Substances 0.000 title claims description 12
- -1 polyethylene Polymers 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 abstract description 4
- 239000011358 absorbing material Substances 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 235000012431 wafers Nutrition 0.000 abstract 3
- 239000000463 material Substances 0.000 description 8
- 238000002604 ultrasonography Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 231100000567 intoxicating Toxicity 0.000 description 1
- 230000002673 intoxicating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides a special transducer for ultrasonic detection of welding seam of a PEX pipeline. The detection method is simple, the sensitivity is high, and the detection result is reliable. The special transducer comprises a metal shell, a binding post, a sound absorbing material, piezoelectric wafers and a delay block; wherein, the delay block comprises a left delay block and a right delay block, the left delay block and the right delay block are connected through a connecting bar, the piezoelectric wafers are respectively arranged at the top parts of the left delay block and the right delay block, the binding post comprises a signal transmitting binding post and a signal receiving binding post, and the signal transmitting binding post and the signal receiving binding post are respectively connected with the piezoelectric wafers at the two sides. The special transducer is characterized in that a magnetic block is arranged below the connecting bar and at the neutral position between the left delay block and the right delay block.
Description
(1) technical field
The utility model relates to the ultrasound examination field, is specially polyethylene pipeline weld joint ultrasonic detection dedicated transducer.
(2) background technology
Polyethylene pipe is used in the underground gas pipe line in cities and towns in a large number because of its corrosion-resistant, easy shaping, characteristic that price is low replace steel pipe.The welding manner of polyethylene pipe is a heat fusion methods, two straight-through polyethylene pipe butt joints, utilize the energising heating, make two tygon pipe joint localized heat molten solders, become butt-weld, in the pipe turning site, curve a certain angle as 90 ° tygon pipe with in advance prefabricated, be enclosed within two straight connector turning sites, the energising heating welds together overcoat tube inner wall and quilt cover tube outer wall heat fusing then, becomes pipe turning cover welding seam.Because the tygon pipe is to weld in the trench that building-site digs in the open, thereby tube surface earth, sewage and other dirts easily are bonded at and bring the weld seam position on the joint for pipe into, make the pipe gas leakage after the welding, because combustion gas proportion is greater than air specific weight, the combustion gas that is spilt by tygon pipe commissure is difficult for racking away, and can slowly enter the user along pipeline from the pipe inlet, cause personnel's intoxicating phenomenon.At present the polyethylene pipeline weld joint Ultrasonic Detection is adopted metal tube or forging detector usually, but the polyethylene pipe ultrasonic longitudinal wave velocity of sound changes in 2000m/s～2200m/s scope, (be that 0.49dB/mm～0.51dB/mm) scope is interior changes polythene material ultrasonic attenuation coefficient μ=490dB/m～510dB/m, the ultrasonic attenuation of its material is big, limited hyperacoustic propagation distance, more than the acoustic characteristic of two polythene materials to cause detecting effect undesirable.
(3) summary of the invention
At the problems referred to above, the utility model provides a kind of polyethylene pipeline weld joint ultrasonic detection dedicated transducer, and its detection method is easy, and is highly sensitive, and testing result is reliable.
Its technical scheme is such: it comprises metal shell, binding post, acoustic absorbant, piezoelectric chip, delay block, described delay block comprises left delay block, right delay block, described left delay block, connect with dowel between the right delay block, described piezoelectric chip is loaded on described left delay block respectively, the top of right delay block, described binding post comprises that signal emission binding post and signal receive binding post, described signal emission binding post receives binding post with signal and is connected with the piezoelectric chip of both sides respectively, it is characterized in that: below described dowel, described left delay block, neutral between the right delay block is provided with magnetic block.
In the said structure of the present utility model, magnetic block can magnetize, strengthen hyperacoustic energy, like this at the acoustic characteristic of polythene material, the ultrasonic attenuation that has solved because of polythene material has limited the propagation of ultrasound wave in polyethylene pipe greatly, the problem that causes detection difficult has improved the sensitivity of ultrasound examination.
(4) description of drawings
Fig. 1 is the utility model internal structure cross-sectional schematic;
Fig. 2 is a left view of the present utility model.
(5) embodiment
See Fig. 1, Fig. 2, the utility model comprises that metal shell 1, signal emission binding post 2a and signal receive binding post 2b, acoustic absorbant 6, piezoelectric chip, left delay block 5a, right delay block 5b, connect with dowel 7 between left side delay block 5a, the right delay block 5b, piezoelectric chip 4a, 4b are loaded on the top of left delay block 5a, right delay block 5b respectively, signal emission binding post 2a receives binding post 2b with signal and is connected with piezoelectric chip 4a, the 4b of both sides respectively, below dowel 7, the neutral between left delay block 5a, the right delay block 5b is provided with magnetic block 8; The main material of acoustic absorbant 6 is epoxy resin and tungsten powder; The transducer lower end is plane or arc surface (being arc surface among Fig. 2); The material of the material of magnetic block 8 for magnetizing.
When polyethylene pipeline weld joint is carried out Ultrasonic Detection, with high frequency cable the Ultrasonic Detection tester is connected with transducer, after energized, L in the supersonic reflectoscope in the synchronizing circuit-C circuit produces the high-frequency electrical vibration, be input to transducer piezoelectric chip 4a, 4b by the high-frequency electrical cable, force piezoelectric chip 4a, 4b to do vertically to shorten and transverse extension formation, thereby produce one with high-frequency mechanical vibration frequently, this high-frequency mechanical vibration imports in the process in the gonnecting rod body by means of couplant and to produce ultrasound wave.The reverse side ripple that absorbing material 6 absorbs in the ultrasound wave, delay block 5a, 5b play delayed-action, sound path is prolonged, make ultrasonic beam once receiving on the detected connecting rod in the far-field region, supersonic beam produces in the near field region a plurality of maximum value and minimal value have been eliminated, minimizing is to the error of defective on quantitatively, thereby improved the quantitative accuracy of various defectives in the connecting rod.Magnetic block 8 strengthens ultrasonic energy, in supersonic beam incides gonnecting rod body on the defective, then be reflected, by piezoelectric chip 4a, 4b receives, through piezoelectric chip 4a, but the inverse piezoelectric effect of 4b, the mechanical vibration conversion that receives is produced electric oscillation by lead 3a, 3b is input in the ultra-sonic defect detector, pass through multistage amplification again, form with pulsating wave appears on the video screen at last, the testing staff can determine depth of defect according to the defect waves position, height according to defect waves carries out quantitatively defect size, thereby has finished the detection task of ultrasound wave to connecting rod.
Claims (1)
1, polyethylene pipeline weld joint ultrasonic detection dedicated transducer, it comprises metal shell, binding post, acoustic absorbant, piezoelectric chip, delay block, described delay block comprises left delay block, right delay block, described left delay block, connect with dowel between the right delay block, described piezoelectric chip is loaded on described left delay block respectively, the top of right delay block, described binding post comprises that signal emission binding post and signal receive binding post, described signal emission binding post receives binding post with signal and is connected with the piezoelectric chip of both sides respectively, it is characterized in that: below described dowel, described left delay block, neutral between the right delay block is provided with magnetic block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200351436U CN201242540Y (en) | 2008-04-14 | 2008-04-14 | Special-purpose transducer for ultrasonic detection of polyethylene pipe weld joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200351436U CN201242540Y (en) | 2008-04-14 | 2008-04-14 | Special-purpose transducer for ultrasonic detection of polyethylene pipe weld joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201242540Y true CN201242540Y (en) | 2009-05-20 |
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ID=40715830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200351436U Expired - Fee Related CN201242540Y (en) | 2008-04-14 | 2008-04-14 | Special-purpose transducer for ultrasonic detection of polyethylene pipe weld joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201242540Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280454A (en) * | 2013-07-11 | 2015-01-14 | 株式会社电装 | Method of detecting defects in honeycomb structural body |
-
2008
- 2008-04-14 CN CNU2008200351436U patent/CN201242540Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280454A (en) * | 2013-07-11 | 2015-01-14 | 株式会社电装 | Method of detecting defects in honeycomb structural body |
| CN104280454B (en) * | 2013-07-11 | 2018-06-08 | 株式会社电装 | The method for detecting the defects of honeycomb structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuxi Jinmao Machinery Equipment Co., Ltd. Assignor: Sun Yuezong Contract record no.: 2010320000161 Denomination of utility model: Polyethylene pipeline weld joint ultrasonic detection dedicated transducer Granted publication date: 20090520 License type: Exclusive License Record date: 20100304 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20110414 |