CN105004784A - Underwater metal structure defect detecting probe based on alternating current electromagnetic field - Google Patents
Underwater metal structure defect detecting probe based on alternating current electromagnetic field Download PDFInfo
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- CN105004784A CN105004784A CN201510522183.8A CN201510522183A CN105004784A CN 105004784 A CN105004784 A CN 105004784A CN 201510522183 A CN201510522183 A CN 201510522183A CN 105004784 A CN105004784 A CN 105004784A
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Abstract
The invention discloses an underwater metal structure defect detecting probe based on an alternating current electromagnetic field. The underwater metal structure defect detecting probe mainly comprises a gland, a bottom cover, a cylinder, a seal joint, an O ring, a detection coil, an excitation circuit, a conditioning circuit, a U-shaped magnetic core, an excitation coil, a seal gasket and a top cover, wherein the detection coil is mounted in a central groove of the bottom cover and connected with the conditioning circuit; the conditioning circuit is mounted in a clamping groove I in the cylinder; the excitation circuit is mounted in a clamping groove II in the cylinder and connected with the excitation coil; the bottom cover is tightly pressed to the bottom of the cylinder by the gland; water isolation space is formed among the bottom cover, the O ring and the cylinder, and a self-sealing effect is realized. The underwater metal structure defect detecting probe has the benefits as follows: the probe for detecting defects of an underwater metal structure is designed by the aid of an alternating current electromagnetic field detection technology, the problem about underwater sealing and the problems of signal attenuation and the like can be solved effectively, and the defects of the underwater metal structure can be detected.
Description
Technical field
The present invention relates to a kind of defect detecting system, particularly a kind of defect detecting system of metallic structures under water based on ac magnetic field.
Background technology
Along with the fast development of Offshore Oil Industry, many ocean platforms, submarine pipeline enter the aging stage.Because metallic structures is subject to the effect of the environmental loads such as wave, easily produce the defects such as burn into fracture, fatigue under water.Timely detection is metallic structures defect under water, for ensureing that the safe operation of marine oil equipment is significant.Traditional sensing techniques is difficult to the detection of metallic structures defect under complicated sea situation.The present invention utilizes alternating current field measurement technology, devises a kind of probe for metallic structures defects detection under water, can effectively solve the problem such as underwater sealing, signal attenuation, has important engineer applied and is worth.
Summary of the invention
Object of the present invention is exactly not enough for prior art, utilize alternating current field measurement technology, devise a kind of probe for metallic structures defects detection under water, can effectively solve the problem such as underwater sealing, signal attenuation, the detection of metallic structures defect under water can be realized, be on active service significant for guarantee marine oil equipment safety.
It is characterized in that: based on the underwater structure flaw detection probe of ac magnetic field, primarily of gland, bottom, cylindrical shell, sealing adaptor, O type circle, magnetic test coil, exciting circuit, modulate circuit, U-shaped magnetic core, drive coil, sealing gasket and top cover composition, described gland is hollow ring structure, gland outside is provided with four elastic openings, inside is provided with internal thread, described bottom is pmma material, bottom edge is provided with two limited blocks, described cylindrical shell is the stainless steel of seawater corrosion resistance, inner barrel is provided with stopper slot, rectangular channel, draw-in groove first, draw-in groove second and seal groove, cylinder body bottom is provided with external thread, described O type circle is the fluorine glue O-ring seal of seawater corrosion resistance, O type circle is arranged in the seal groove of cylindrical shell, described magnetic test coil is arranged in the central recess of bottom, magnetic test 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 drive coil, described drive coil is wrapped on U-shaped magnetic core crossbeam, described U-shaped magnetic core is arranged in the rectangle draw-in groove of inner barrel, described bottom is arranged on cylinder body bottom, the limited block of bottom is arranged in the stopper slot of cylindrical shell, the internal thread of described gland coordinates with the external thread of cylindrical shell, bottom is compacted to cylinder body bottom by described gland, described sealing gasket is enclosed within sealing adaptor, described sealing adaptor is arranged on top cover, described top cover is arranged on cylindrical shell top.
The elastic opening of described gland can be used for tightening of gland and unclamps, bottom is compacted to cylinder body bottom by described gland, bottom, water proof space is formed between O type circle and cylindrical shell, pop one's head in darker under water, seawater is larger to bottom pressure, in cylindrical shell, space sealing is better, reach self sealss effect, described exciting circuit can produce pumping signal, pumping signal produces alternating electromagnetic field by drive coil at surface of the work, described magnetic test coil is for detecting the electromagnetic field distorted near defect, described modulate circuit amplifies and filtering the signal that magnetic test coil detects, described sealing adaptor is used for the sealing between signal cable and cylindrical shell, exciting circuit and modulate circuit are encapsulated in inner barrel jointly, can effectively reduce marine environment signal disturbing, reduce signal by seabed to the decay on sea, reduce probe size simultaneously.
Accompanying drawing explanation
Accompanying drawing 1 is overall schematic of the present invention.
Accompanying drawing 2 is scheme of installations of the present invention.
Accompanying drawing 3 is cylindrical shell schematic diagram of the present invention.
Accompanying drawing 4 is inner barrel schematic diagram of the present invention.
Accompanying drawing 5 is outside schematic diagram of the present invention.
In upper figure: gland 1, elastic opening 1.1, internal thread 1.2, bottom 2, limited block 2.1, cylindrical shell 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 thread 3.6, sealing adaptor 4, O type circle 5, magnetic test coil 6, modulate circuit 7, exciting circuit 8, U-shaped magnetic core 9, drive coil 10, sealing gasket 11, top cover 12.
Embodiment
1-5 by reference to the accompanying drawings, the invention will be further described:
The present invention is primarily of gland 1, bottom 2, cylindrical shell 3, sealing adaptor 4, O type circle 5, magnetic test coil 6, exciting circuit 7, modulate circuit 8, U-shaped magnetic core 9, drive coil 10, sealing gasket 11 and top cover 12 form, described gland 1 is hollow ring structure, gland outside is provided with four elastic openings 1.1, inside is provided with internal thread 1.2, described bottom 2 is pmma material, bottom 2 edge is provided with two limited blocks 2.1, described cylindrical shell 3 is the 316L stainless steel of seawater corrosion resistance, cylindrical shell 3 inside 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, external thread 3.6 is provided with bottom cylindrical shell 3, described O type circle 5 is the fluorine glue O-ring seal of seawater corrosion resistance, O type circle 5 is arranged in the seal groove 3.5 of cylindrical shell 3, described magnetic test coil 6 is arranged in the central recess of bottom 2, magnetic test coil 6 is connected with modulate circuit 7, described modulate circuit 7 is arranged in the inner draw-in groove first 3.3 of cylindrical shell 3, described exciting circuit 8 is arranged in inner barrel draw-in groove second 3.4, described exciting circuit 8 is connected with drive coil 10, described drive 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 of cylindrical shell 3 inside, described bottom 2 is arranged on bottom cylindrical shell 3, the limited block 2.1 of bottom 2 is arranged in the stopper slot 3.1 of cylindrical shell 3, the internal thread 1.2 of described gland 1 coordinates with the external thread 3.6 of cylindrical shell 3, bottom 2 is compacted to bottom cylindrical shell 3 by described gland 1, described sealing gasket 11 is enclosed within sealing adaptor 4, described sealing adaptor 4 is arranged on top cover 12, described top cover 12 is arranged on cylindrical shell 3 top.
The elastic opening 1.1 of described gland 1 can be used for tightening of gland 1 and unclamps, bottom 2 is compacted to bottom cylindrical shell 3 by described gland 1, bottom 2, water proof space is formed between O type circle 5 and cylindrical shell 3, pop one's head in darker under water, seawater is larger to bottom 2 pressure, in cylindrical shell, space sealing is better, reach self sealss effect, described exciting circuit 8 can produce pumping signal, pumping signal produces alternating electromagnetic field by drive coil 10 at surface of the work, described magnetic test coil 6 is for detecting the electromagnetic field distorted near defect, the signal that described modulate circuit 7 pairs of magnetic test coils 6 detect amplifies and filtering, described sealing adaptor 4 is for the sealing between signal cable and cylindrical shell 3, exciting circuit 8 and modulate circuit 7 are encapsulated in jointly cylindrical shell 3 inner, can effectively reduce marine environment signal disturbing, reduce signal by seabed to the decay on sea, reduce probe size simultaneously.
The invention has the beneficial effects as follows: utilize alternating current field measurement technology, devise a kind of probe for metallic structures defects detection under water, can effectively solve the problem such as underwater sealing, signal attenuation, the detection of metallic structures defect under water can be realized, be on active service significant for guarantee marine oil equipment safety.
Claims (1)
1. the flaw detection probe of metallic structures under water based on ac magnetic field, it is characterized in that: primarily of gland, bottom, cylindrical shell, sealing adaptor, O type circle, magnetic test coil, exciting circuit, modulate circuit, U-shaped magnetic core, drive coil, sealing gasket and top cover composition, described gland is hollow ring structure, gland outside is provided with four elastic openings, inside is provided with internal thread, described bottom is pmma material, bottom edge is provided with two limited blocks, described cylindrical shell is the stainless steel of seawater corrosion resistance, inner barrel is provided with stopper slot, rectangular channel, draw-in groove first, draw-in groove second and seal groove, cylinder body bottom is provided with external thread, described O type circle is the fluorine glue O-ring seal of seawater corrosion resistance, O type circle is arranged in the seal groove of cylindrical shell, described magnetic test coil is arranged in the central recess of bottom, magnetic test 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 drive coil, described drive coil is wrapped on U-shaped magnetic core crossbeam, described U-shaped magnetic core is arranged in the rectangle draw-in groove of inner barrel, described bottom is arranged on cylinder body bottom, the limited block of bottom is arranged in the stopper slot of cylindrical shell, the internal thread of described gland coordinates with the external thread of cylindrical shell, bottom is compacted to cylinder body bottom by described gland, described sealing gasket is enclosed within sealing adaptor, described sealing adaptor is arranged on top cover, described top cover is arranged on cylindrical shell top.
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| 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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| 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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| CN105004784A true CN105004784A (en) | 2015-10-28 |
| CN105004784B CN105004784B (en) | 2016-08-17 |
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Cited By (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 |
| CN106198719A (en) * | 2016-09-18 | 2016-12-07 | 中国石油大学(华东) | One conducting material structure thing defect alternating current field measurement instrument under water |
| CN106248782A (en) * | 2016-09-18 | 2016-12-21 | 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 |
| CN107843642A (en) * | 2016-09-18 | 2018-03-27 | 中国石油大学(华东) | A kind of marine structure defect ac magnetic field three-dimensional imaging detection probe |
| CN108375628A (en) * | 2016-09-18 | 2018-08-07 | 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 |
| CN111290032A (en) * | 2020-03-11 | 2020-06-16 | 中国石油大学(华东) | Electromagnetic-based intelligent stratum metal identification device and identification method |
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Cited By (11)
| 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 |
| CN106198719A (en) * | 2016-09-18 | 2016-12-07 | 中国石油大学(华东) | One conducting material structure thing defect alternating current field measurement instrument under water |
| CN106248782A (en) * | 2016-09-18 | 2016-12-21 | 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 |
| CN107843642A (en) * | 2016-09-18 | 2018-03-27 | 中国石油大学(华东) | A kind of marine structure defect ac magnetic field three-dimensional imaging detection probe |
| 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 |
| CN108375628A (en) * | 2016-09-18 | 2018-08-07 | 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 |
| 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 |
| CN108375628B (en) * | 2016-09-18 | 2022-07-26 | 中国石油大学(华东) | Circumferential electromagnetic field pipeline inner wall crack detection system and quantitative evaluation method |
| CN111290032A (en) * | 2020-03-11 | 2020-06-16 | 中国石油大学(华东) | Electromagnetic-based intelligent stratum metal identification device and identification method |
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| CN105004784B (en) | 2016-08-17 |
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