CN201884941U - Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector - Google Patents
Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector Download PDFInfo
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- CN201884941U CN201884941U CN2010205971983U CN201020597198U CN201884941U CN 201884941 U CN201884941 U CN 201884941U CN 2010205971983 U CN2010205971983 U CN 2010205971983U CN 201020597198 U CN201020597198 U CN 201020597198U CN 201884941 U CN201884941 U CN 201884941U
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Abstract
The utility model relates to a magnetic circuit structure of a pipeline magnetic flux leakage corrosion detection, belongs to the technical field of magnetic variable and thickness linear dimension measurement and pipeline systems. Magnet probe blocks are distributed circumferentially, the clearance between each two blocks ranges from 10mm to 30mm, the number of the magnet probe blocks is an even umber larger than six as the magnetic flux leakage corrosion detector is adaptable to pipelines of different diameter, and each magnet probe block has respective independent supporting mechanism. Each block magnetic circuit structure includes that two sector-shaped magnets (2) are fixed to two ends of an elongated iron core (1), the magnets (2) directly contact with a pipeline wall (3), and a probe (5) is mounted in the middle of the two magnets (2) and is fixed on the iron core (1) by the aid of first springs (4). The magnets directly contact with the pipeline wall, so that magnetic conducting loss due to the original steel brush is reduced greatly, and the magnetic circuit structure is small in dimension design and simple and compact in structure.
Description
Technical field
The utility model is a kind of pipe leakage corrosion detector magnetic structure.Relate to measurement and and the pipe-line system technical field of measuring magnetic variable, thickness linear dimension.
Background technique
Along with the pipe-line construction fast development, pipe leakage detector is a kind of intelligent detection equipment that is widely used in length apart from the defects detection such as inside and outside burn into metal loss of oil and gas pipeline, and can detect pipeline features such as valve, flange, elbow, weld seam.It mainly is made up of magnet, iron core, probe, sensor, mileage navigation system, ground marking system, data capture storage system and data analysis system etc.Utilize the large size burn into hole shape that this equipment can exist for pipeline and the length and width of pit corrosion, dark proterties to detect accurately.Detect data and can be used as the important evidence that pipeline carries out integrity assessment.Facts have proved, carry out the online detection of pipeline, utilize that testing result is scientifically managed, service conduit, bring remarkable economic efficiency and social benefit can for the pipeline owner.Pipe leakage detector application at home provides high guarantee with the safe operation that is extended to pipeline, plays an important role in the pipeline transport industry, and convenience and the safety brought for the network operator also are conspicuous.
The principle of flux leakage detector roughly is: its magnet part closely contacts with tube wall by wire brush, make and produce a longitudinal magnetism field of line on the tube wall circumference, when flux leakage detector moves in pipe, the magnetic line of force is not limited within the tube wall if pipeline has defective, and the distribution of the tube wall magnetic line of force is more even and stable; And if in the pipeline or during outer defectiveness, then the magnetic line of force of rejected region will pass outside the tube wall, the leakage of the magnetic line of force changes magnetic field, leakage field sensor-the probe that is positioned at two interpolars receives the signal of this variation, after amplification and conversion, obtain detecting data and be stored on the disk, the machine analytical system is analyzed the wall erosion situation that then can learn the pipeline total length to data as calculated again.
The realization of leakage field corrosion detector needs an important constituent element, and that is exactly the field circuit system.
The magnetic structure of conventional leakage field corrosion detector is the structure of an integral body.It is to adopt former and later two ring magnets to be fixed on the two ends of a cylinder-shaped iron core, and the mounted on surface of magnet has annular steel brush, closely contacts the whole magnetic loop of conducting by steel brush with inner-walls of duct.In the neutral position of magnet steel brush circumferential arrangement one circle probe is arranged, probe is fixed on above the iron core by spring.The steel brush magnetic conduction loss of this structure is bigger, the structure more complicated, and size is bigger.
The model utility content
The purpose of this utility model is little, simple in structure, the compact pipe leakage corrosion detector magnetic structure of a kind of magnetic conduction loss of design.
Magnetic structure of the present utility model is block structure shown in Fig. 1 (circumferential cross-section figure).The magnet that makes progress in week pops one's head in block the distribution, and per two interblocks have certain clearance, and in order to increase probe in circumferential coverage scale, the gap between the probe piece can not be too big, generally at 10-30mm.Adapt to the difference of pipe diameter according to the leakage field corrosion detector, the number of magnet probe piece is 6 above even numbers, promptly 6,8,10 even more.Each magnet probe piece each has independently supporting mechanism, independence phugoid motion when running into pipe deforming.
Each block magnetic structure of the present utility model as shown in Figure 2.Two fan-shaped magnet 2 are fixed on the two ends of the iron core 1 of a long strip, and magnet 2 directly touches tube wall 3.Probe 5 is installed in the neutral position of two magnet 2, and probe 5 is to be fixed on above the iron core 1 by spring I 4.Each block magnet probe mechanism each has independently supporting mechanism.
Described supporting mechanism is formed (seeing Fig. 3 and Fig. 4) by connecting rod 6, fixing frame 7, spring II8, pull bar 9 and movable arm 10.Be connected by the end movable rotation-shaft of connecting rod 6 with iron core 1 and fixing frame 7, connecting rod 6 is connected with pull bar 9 usefulness latches at fixing frame 7 places, and pull bar 9 outer casing spring II8, pull bar 9 the other ends are fixed with the catch of retaining spring II8; The other end of fixing frame 7 is flexibly connected by the other end of movable arm 10 with iron core 1 and fixing frame 7.
Wherein:
Connecting rod 6 shapes such as L shaped, long-armed and ratio galianconism is 2: 1～4: 1; The termination of two arms is a fork-shaped, and sticks two relative holes, and the intersection of two arms has two relative holes are also arranged on groove and the groove;
Fixing frame 7 is welded structures, and two ends are flanges, and the center is a hollow cylinder; Outer side at two flanges respectively has a step ear, is equipped with through hole on the ear;
Connecting rod 6 with the Placement of iron core 1 and fixing frame 7 is: two holes of connecting rod 6 terminations fork and two arm intersection grooves penetrate fixing with the top bar through hole of ear of iron core 1 and fixing frame 7 respectively with latch; Connecting rod 6 also is that two holes penetrate fixing with latch with pull bar 9;
The realization of the unsteady supporting mechanism of each block magnetic structure is such, after block magnetic structure runs into pipe deforming, move downward, two ends of connecting rod 6 all have movable rotation-shaft, connecting rod 6 rotates back drive pull bar 9 and causes spring II 8 compressions to left movement, the movable arm 10 that magnetic circuit piece right-hand member is installed plays a supportive role, and also follows the magnetic circuit piece simultaneously and does the interlock motion.Passed through pipe deforming after the magnetic circuit piece presses down after, drive pull bar 9 and connecting rod 6 are done reseting movement under the spring-back force effect of spring II 8, and the magnetic circuit piece just can successfully be returned to the position of being close to inner-walls of duct.The supporting mechanism of each magnetic circuit piece all is such.
The utility model has significantly reduced the magnetic conduction loss of original steel brush owing to be that magnet directly contacts tube wall, and is so design size is small and exquisite, simple in structure, compact.
Description of drawings
The circumferential distribution map of the block magnetic structure of Fig. 1 leakage field corrosion detector
The block magnetic structure A-A of Fig. 2 leakage field corrosion detector sectional view: magnet probe en-block construction figure
Fig. 3 supporting mechanism connecting rod connection diagram
Fig. 4 supporting mechanism movable arm connection diagram
1-iron core 2-magnet wherein
3-tube wall 4-spring I
5-probe 6-connecting rod
7-fixing frame 8-spring II
9-pull bar 10-movable arm
Embodiment
Embodiment. this example is the magnetic structure of 219mm pipe leakage corrosion detector, and week is upwards arranged 8 altogether, and each magnet probe piece becomes fan shape, about 36 degree, there is 15mm in the gap between per two.
The formation of whole magnet sonde configuration is made up of iron core 1, magnet 2, spring I 4, probe 5, connecting rod 6, fixing frame 7, spring II 8, pull bar 9, movable arm 10 as depicted in figs. 1 and 2.Specifically installation is, two fan-shaped magnet 2 are fixed on the two ends of the iron core 1 of a long strip, and magnet 2 directly touches tube wall 3.Probe 5 is installed in the neutral position of two magnet, and probe 5 is to be fixed on above the iron core 1 by spring 4.Each block magnet probe mechanism each has independently supporting structure.
Supporting mechanism is made up of connecting rod 6, fixing frame 7, spring II 8, pull bar 9 and movable arm 10.Be connected by the end movable rotation-shaft of connecting rod 6 with iron core 1 and fixing frame 7, connecting rod 6 is connected with pull bar 9 hinges at fixing frame 7 places, and pull bar 9 outer casing spring II 8, pull bar 9 the other ends are fixed with the catch of retaining spring II 8; The other end of fixing frame 7 is flexibly connected by the other end of movable arm 10 with iron core 1 and fixing frame 7.
Wherein: the shape of iron core 1 also is a long strip, length 190mm, and the cross section becomes 36 degree fan shapes, thickness 30mm;
The shape of connecting rod 6 is similar to the L type on the supporting mechanism, thickness 6mm, and long-armed and ratio galianconism is 3: 1;
The length 50mm of spring 8, maximum spring force is approximately 20 kgfs;
Fixing frame 7 is welded structures, and two ends are flanges, and the center is a hollow cylinder, length 120mm;
This example is verified through distraction test, the magnetic structure of magnet probe piece has reached the purpose of magnetizing pipeline fully, testing signal is good, the magnet arrangement that its magnetic structure is traditional relatively is owing to be that magnet directly contacts tube wall, significantly reduced the magnetic conduction loss of steel brush, so it is design size is small and exquisite, simple in structure, compact.
Claims (10)
1. a pipe leakage corrosion detector magnetic structure is characterized in that popping one's head in block the distribution at the magnet that makes progress in week, and the gap of per two interblocks is 10-30mm; According to the difference of leakage field corrosion detector adaptation pipe diameter, the number of magnet probe piece is the even number more than 6; Each magnet probe piece each has independently supporting mechanism.
2. a kind of pipe leakage corrosion detector magnetic structure according to claim 1, it is characterized in that each block magnetic structure is the two ends that two fan-shaped magnet (2) are fixed on the iron core (1) of a long strip, magnet (2) directly touches tube wall (3); In the neutral position of two magnet (2) probe (5) is installed, probe (5) is to be fixed on above the iron core (1) by spring I (4).
3. a kind of pipe leakage corrosion detector magnetic structure according to claim 1 is characterized in that described supporting mechanism is made up of connecting rod (6), fixing frame (7), spring II (8), pull bar (9) and movable arm (10); Be connected by the end movable rotation-shaft of connecting rod (6) with iron core (1) and fixing frame (7), connecting rod (6) is located to be connected with latch with pull bar (9) at fixing frame (7), and pull bar (9) outer casing spring II (8), pull bar (9) the other end are fixed with the catch of retaining spring II (8); The other end of fixing frame (7) is flexibly connected by the other end of movable arm (10) with iron core (1) and fixing frame (7).
4. a kind of pipe leakage corrosion detector magnetic structure according to claim 2 is characterized in that described iron core (1) is fan-shaped iron core for rectangular cross section; Respectively there is a step ear at rectangular two ends, are equipped with through hole on the ear.
5. a kind of pipe leakage corrosion detector magnetic structure according to claim 2 is characterized in that described magnet (2) is sector unit, above little below big.
6. a kind of pipe leakage corrosion detector magnetic structure according to claim 3 is characterized in that described connecting rod (6) shape such as L shaped, and long-armed and ratio galianconism is 2: 1～4: 1; The termination of two arms is a fork-shaped, and sticks two relative holes, and the intersection of two arms has two relative holes are also arranged on groove and the groove.
7. a kind of pipe leakage corrosion detector magnetic structure according to claim 3 is characterized in that described fixing frame (7) is a welded structure, and two ends are flanges, and the center is a hollow cylinder; Outer side at two flanges respectively has a step ear, is equipped with through hole on the ear.
8. a kind of pipe leakage corrosion detector magnetic structure according to claim 3 is characterized in that described movable arm (10) shape such as L shaped, and long-armed and ratio galianconism is 2: 1～4: 1; The termination of two arms is a fork-shaped, and sticks two relative holes, and the intersection of two arms has two relative holes are also arranged on groove and the groove.
9. a kind of pipe leakage corrosion detector magnetic structure according to claim 3 is characterized in that the Placement of described connecting rod (6) and iron core (1) and fixing frame (7) is: pitch connecting rod (6) termination and two holes of two arm intersection grooves penetrate fixing with the top bar through hole of ear of iron core (1) and fixing frame (7) respectively with latch; Connecting rod (6) also is that two holes penetrate fixing with latch with pull bar (9).
10. a kind of pipe leakage corrosion detector magnetic structure according to claim 3 is characterized in that the Placement of described movable arm (10) and iron core (1) and fixing frame (7) is: two holes of movable arm (10) two end yokes penetrate fixing with the top bar through hole of ear of iron core (1) and fixing frame (7) respectively with latch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205971983U CN201884941U (en) | 2010-11-04 | 2010-11-04 | Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205971983U CN201884941U (en) | 2010-11-04 | 2010-11-04 | Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector |
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| CN201884941U true CN201884941U (en) | 2011-06-29 |
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| CN2010205971983U Expired - Lifetime CN201884941U (en) | 2010-11-04 | 2010-11-04 | Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764801A (en) * | 2015-04-08 | 2015-07-08 | 沈阳仪表科学研究院有限公司 | Magnetic leakage corrosion track detector for inner wall of pipeline |
| CN107559599A (en) * | 2017-08-31 | 2018-01-09 | 四川省冶地工程勘察设计有限公司 | The detection device and detection method of a kind of underground metal pipes |
| CN108802169A (en) * | 2017-04-28 | 2018-11-13 | 中石化石油工程技术服务有限公司 | Detection device in a kind of pipe-line |
| CN109458564A (en) * | 2018-11-02 | 2019-03-12 | 苏州康诚俍机电科技有限公司 | A kind of nitrogen gas delivery-line gas leakage detection and interim device for plugging |
| CN110376276A (en) * | 2019-08-08 | 2019-10-25 | 中国石油天然气股份有限公司 | Pipeline magnetic leakage detection device |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
-
2010
- 2010-11-04 CN CN2010205971983U patent/CN201884941U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764801A (en) * | 2015-04-08 | 2015-07-08 | 沈阳仪表科学研究院有限公司 | Magnetic leakage corrosion track detector for inner wall of pipeline |
| CN108802169A (en) * | 2017-04-28 | 2018-11-13 | 中石化石油工程技术服务有限公司 | Detection device in a kind of pipe-line |
| CN107559599A (en) * | 2017-08-31 | 2018-01-09 | 四川省冶地工程勘察设计有限公司 | The detection device and detection method of a kind of underground metal pipes |
| CN107559599B (en) * | 2017-08-31 | 2018-12-21 | 四川省冶地工程勘察设计有限公司 | A kind of detection device and detection method of underground metal pipes |
| CN109458564A (en) * | 2018-11-02 | 2019-03-12 | 苏州康诚俍机电科技有限公司 | A kind of nitrogen gas delivery-line gas leakage detection and interim device for plugging |
| CN109458564B (en) * | 2018-11-02 | 2020-01-03 | 苏州康诚俍机电科技有限公司 | Nitrogen gas pipeline leakage detecting and temporary plugging device |
| CN110376276A (en) * | 2019-08-08 | 2019-10-25 | 中国石油天然气股份有限公司 | Pipeline magnetic leakage detection device |
| CN110376276B (en) * | 2019-08-08 | 2022-11-04 | 中国石油天然气股份有限公司 | Pipeline magnetic leakage detection device |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170309 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: China National Petroleum Corporation Patentee after: China Petroleum Pipeline Bureau Engineering Co., Ltd. Address before: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee before: China National Petroleum Corporation Patentee before: China Petroleum and Natural Gas Pipeline Bureau |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |