CN105004784B - Metallic structures flaw detection probe under water based on ac magnetic field - Google Patents
Metallic structures flaw detection probe under water based on ac magnetic field Download PDFInfo
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- CN105004784B CN105004784B CN201510522183.8A CN201510522183A CN105004784B CN 105004784 B CN105004784 B CN 105004784B CN 201510522183 A CN201510522183 A CN 201510522183A CN 105004784 B CN105004784 B CN 105004784B
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Abstract
The invention discloses a kind of metallic structures flaw detection probe under water based on ac magnetic field, main by gland, bottom, cylinder, seal nipple, O, detection coil, exciting circuit, modulate circuit, U-shaped magnetic core, excitation coil, sealing gasket and top cover composition, described detection coil is arranged in the central recess of bottom, detection coil is connected with modulate circuit, described modulate circuit is arranged in inner barrel draw-in groove first, described exciting circuit is arranged in inner barrel draw-in groove second, described exciting circuit is connected with excitation coil, bottom is compacted to cylinder body bottom by described gland, bottom, water proof space is formed between O and cylinder, reach self sealss effect.Beneficial effects of the present invention is as follows: utilize alternating current field measurement technology, devises a kind of probe for metallic structures defects detection under water, it is possible to effectively solve the problem such as underwater sealing, signal attenuation, can realize the detection of metallic structures defect under water.
Description
Technical field
The present invention relates to a kind of defect detecting system, lack particularly to a kind of metallic structures under water based on ac magnetic field
Fall into detecting system.
Background technology
Along with the fast development of Offshore Oil Industry, many ocean platforms, submarine pipeline enter the aging stage.Due to water
Lower metallic structures is acted on by environmental loads such as waves, easily produces the defects such as burn into fracture, fatigue.Detect water in time
Lower metallic structures defect, significant for ensureing the safe operation of offshore oil equipment.Traditional sensing techniques is difficult to use
The detection of metallic structures defect under complicated sea situation.The present invention utilizes alternating current field measurement technology, devises a kind of for water
The probe of lower metallic structures defects detection, it is possible to effectively solve the problem such as underwater sealing, signal attenuation, having important engineering should
By value.
Summary of the invention
It is not enough that the purpose of the present invention is aiming at prior art, utilizes alternating current field measurement technology, devise a kind of for
The probe of metallic structures defects detection under water, it is possible to effectively solve the problem such as underwater sealing, signal attenuation, can realize gold under water
Belong to the detection of works defect, for ensureing that offshore oil equipment safety is on active service significant.
It is characterized in that: underwater structure flaw detection probe based on ac magnetic field, mainly by gland, bottom, cylinder
Body, seal nipple, O, detection coil, exciting circuit, modulate circuit, U-shaped magnetic core, excitation coil, sealing gasket and
Top cover forms, and described gland is hollow ring structure, is provided with four elastic openings, inside is provided with female thread, described outside gland
Bottom is pmma material, and bottom edge is provided with two limited blocks, and described cylinder is the rustless steel of seawater corrosion resistance, in cylinder
Portion is provided with stopper slot, rectangular channel, draw-in groove first, draw-in groove second and seal groove, and cylinder body bottom is provided with external screw thread, and described O is
The polyfluoroprene sealing ring of seawater corrosion resistance, O is arranged in the seal groove of cylinder, and described detection coil is arranged on the center of bottom
In groove, detection coil is connected with modulate circuit, and described modulate circuit is arranged in inner barrel draw-in groove first, described exciting circuit
Being arranged in inner barrel draw-in groove second, described exciting circuit is connected with excitation coil, and described excitation coil is wrapped in U-shaped magnetic core
On crossbeam, described U-shaped magnetic core is arranged in the rectangle draw-in groove of inner barrel, and described bottom is arranged on cylinder body bottom, bottom
Limited block is arranged in the stopper slot of cylinder, and the female thread of described gland coordinates with the external screw thread of cylinder, and described gland is by bottom pressure
Tight to cylinder body bottom, described sealing gasket is enclosed within seal nipple, and described seal nipple is arranged on top cover, and described top cover is arranged on
Cylinder top.
The elastic opening of described gland can be used for tightening and unclamping of gland, and bottom is compacted to cylinder body bottom, the end by described gland
Covering, form water proof space between O and cylinder, pop one's head in the deepest, sea water is the biggest to bottom pressure, space in cylinder
It is the best to seal, and reaches self sealss effect, and described exciting circuit can produce pumping signal, and pumping signal passes through excitation coil at workpiece
Surface produces alternating electromagnetic field, and described detection coil is for detecting the electromagnetic field of distortion near defect, and described modulate circuit is to detection
Coil Detector to signal be amplified and filter, described seal nipple, will excitation for sealing between signal cable and cylinder
Circuit and modulate circuit are mutually encapsulated into inner barrel, are effectively reduced marine environment signal disturbing, reduce signal by seabed to sea
Decay on face, reduces probe size simultaneously.
Accompanying drawing explanation
Accompanying drawing 1 is the overall schematic of the present invention.
Accompanying drawing 2 is the scheme of installation of the present invention.
Accompanying drawing 3 is the cylinder schematic diagram of the present invention.
Accompanying drawing 4 is the inner barrel schematic diagram of the present invention.
Accompanying drawing 5 is the outside schematic diagram of the present invention.
In upper figure: gland 1, elastic opening 1.1, female thread 1.2, bottom 2, limited block 2.1, cylinder 3, stopper slot
3.1, rectangular channel 3.2, draw-in groove first 3.3, draw-in groove second 3.4, seal groove 3.5, external screw thread 3.6, seal nipple 4, O
5, detection coil 6, modulate circuit 7, exciting circuit 8, U-shaped magnetic core 9, excitation coil 10, sealing gasket 11, top cover
12。
Detailed description of the invention
In conjunction with accompanying drawing 1-5, the invention will be further described:
The present invention is mainly by gland 1, bottom 2, cylinder 3, seal nipple 4, O 5, detection coil 6, excitation electricity
Road 7, modulate circuit 8, U-shaped magnetic core 9, excitation coil 10, sealing gasket 11 and top cover 12 form, during described gland 1 is
Empty loop configuration, is provided with four elastic openings 1.1, inside is provided with female thread 1.2 outside gland, described bottom 2 is lucite
Material, bottom 2 edge is provided with two limited blocks 2.1, and described cylinder 3 is the 316L rustless steel of seawater corrosion resistance, in cylinder 3
Portion is provided with stopper slot 3.1, rectangular channel 3.2, draw-in groove first 3.3, draw-in groove second 3.4 and seal groove 3.5, is provided with outer spiral shell bottom cylinder 3
Stricture of vagina 3.6, described O 5 is the polyfluoroprene sealing ring of seawater corrosion resistance, and O 5 is arranged on the seal groove 3.5 of cylinder 3
In, described detection coil 6 is arranged in the central recess of bottom 2, and detection coil 6 is connected with modulate circuit 7, described conditioning
Circuit 7 is arranged in the internal draw-in groove first 3.3 of cylinder 3, and described exciting circuit 8 is arranged in inner barrel draw-in groove second 3.4, institute
Stating exciting circuit 8 to be connected with excitation coil 10, described excitation coil 10 is wrapped on U-shaped magnetic core 9 crossbeam, described U-shaped
Magnetic core 9 is arranged in the rectangle draw-in groove 3.2 within cylinder 3, and described bottom 2 is arranged on bottom cylinder 3, bottom 2 spacing
Block 2.1 is arranged in the stopper slot 3.1 of cylinder 3, and the female thread 1.2 of described gland 1 coordinates with the external screw thread 3.6 of cylinder 3,
Bottom 2 is compacted to bottom cylinder 3 by described gland 1, and described sealing gasket 11 is enclosed within seal nipple 4, described seal nipple
4 are arranged on top cover 12, and described top cover 12 is arranged on cylinder 3 top.
The elastic opening 1.1 of described gland 1 can be used for tightening and unclamping of gland 1, and bottom 2 is compacted to cylinder by described gland 1
Bottom body 3, forming water proof space, pop one's head in the deepest between bottom 2, O 5 and cylinder 3, sea water is to bottom 2
Pressure is the biggest, and in cylinder, space sealing is the best, reaches self sealss effect, and described exciting circuit 8 can produce pumping signal, excitation
Signal produces alternating electromagnetic field by excitation coil 10 at surface of the work, and described detection coil 6 is used for detecting distortion near defect
Electromagnetic field, the detection signal that detects of coil 6 is amplified and filters by described modulate circuit 7, and described seal nipple 4 is used
Sealing between signal cable and cylinder 3, is mutually encapsulated into exciting circuit 8 and modulate circuit 7 cylinder 3 internal, can have
Effect reduces marine environment signal disturbing, reduces the signal decay by seabed to sea, reduces probe size simultaneously.
The invention has the beneficial effects as follows: utilize alternating current field measurement technology, devise a kind of for metallic structures under water
The probe of defects detection, it is possible to effectively solve the problem such as underwater sealing, signal attenuation, can realize metallic structures defect under water
Detection, for ensureing that offshore oil equipment safety is on active service significant.
Claims (1)
1. a metallic structures flaw detection probe under water based on ac magnetic field, is characterized in that: mainly by gland, bottom,
Cylinder, seal nipple, O, detection coil, exciting circuit, modulate circuit, U-shaped magnetic core, excitation coil, sealing gasket
Forming with top cover, described gland is hollow ring structure, is provided with four elastic openings, inside is provided with female thread, institute outside gland
Stating bottom is pmma material, and bottom edge is provided with two limited blocks, and described cylinder is the rustless steel of seawater corrosion resistance, cylinder
Inside is provided with stopper slot, rectangular channel, draw-in groove first, draw-in groove second and seal groove, and cylinder body bottom is provided with external screw thread, described O
For the polyfluoroprene sealing ring of seawater corrosion resistance, O is arranged in the seal groove of cylinder, and described detection coil is arranged in bottom
In heart groove, detection coil is connected with modulate circuit, and described modulate circuit is arranged in inner barrel draw-in groove first, described excitation electricity
Road is arranged in inner barrel draw-in groove second, and described exciting circuit is connected with excitation coil, and described excitation coil is wrapped in U-shaped magnetic
On core crossbeam, described U-shaped magnetic core is arranged in the rectangle draw-in groove of inner barrel, and described bottom is arranged on cylinder body bottom, bottom
Limited block be arranged in the stopper slot of cylinder, the female thread of described gland coordinates with the external screw thread of cylinder, and described gland is by bottom
Being compacted to cylinder body bottom, described sealing gasket is enclosed within seal nipple, and described seal nipple is arranged on top cover, and described top cover is installed
At cylinder top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510522183.8A CN105004784B (en) | 2015-08-24 | 2015-08-24 | Metallic structures flaw detection probe under water based on ac magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510522183.8A CN105004784B (en) | 2015-08-24 | 2015-08-24 | Metallic structures flaw detection probe under water based on ac magnetic field |
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| Publication Number | Publication Date |
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| CN105004784A CN105004784A (en) | 2015-10-28 |
| CN105004784B true CN105004784B (en) | 2016-08-17 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891324A (en) * | 2016-04-06 | 2016-08-24 | 中国海洋石油总公司 | Seafloor pulse vortex detection probe |
| CN106018542A (en) * | 2016-05-16 | 2016-10-12 | 中国石油天然气集团公司 | Alternating-current magnetic field underwater crack detection device and method |
| CN106198719B (en) * | 2016-09-18 | 2018-06-22 | 中国石油大学(华东) | A kind of underwater conducting material structure object defect alternating current field measurement instrument |
| CN106248782B (en) * | 2016-09-18 | 2019-08-23 | 中国石油大学(华东) | A kind of deep-sea intelligent storage alternating current field measurement system and method for determining defects |
| CN107843642B (en) * | 2016-09-18 | 2020-11-03 | 中国石油大学(华东) | Three-dimensional imaging detection probe for defects of ocean structures through alternating current electromagnetic field |
| CN106198716B (en) * | 2016-09-18 | 2018-06-29 | 中国石油大学(华东) | A kind of circumferential direction electromagnetic field inner wall of the pipe flaw detection system and quantitative evaluating method |
| CN111290032B (en) * | 2020-03-11 | 2022-07-15 | 中国石油大学(华东) | Electromagnetic-based stratum metal intelligent recognition device and recognition method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58189554A (en) * | 1982-04-30 | 1983-11-05 | Sumitomo Kaiyo Kaihatsu Kk | Device for watching and photographing underwater magnetic powder crack check test |
| CN1018951B (en) * | 1989-09-08 | 1992-11-04 | 中国科学院金属腐蚀与防护研究所 | Hydrogen-cracking detector for nodes in ocean platform |
| CN1243242C (en) * | 2003-12-31 | 2006-02-22 | 浙江大学 | Deep sea abnormal environment physico chemical quantity detection device |
| CN1828219A (en) * | 2006-04-06 | 2006-09-06 | 上海交通大学 | Intelligent detector for submarine pipeline |
| CN101701934A (en) * | 2009-11-16 | 2010-05-05 | 中国石油大学(华东) | ACFM intelligent visual defect detection system |
| CN102520059A (en) * | 2011-12-30 | 2012-06-27 | 南昌航空大学 | Circuit device based on disturbed magnetic field detection instrument |
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