CN111579636A - Odd-even staggered magnetic flux leakage detector - Google Patents
Odd-even staggered magnetic flux leakage detector Download PDFInfo
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- CN111579636A CN111579636A CN202010586304.6A CN202010586304A CN111579636A CN 111579636 A CN111579636 A CN 111579636A CN 202010586304 A CN202010586304 A CN 202010586304A CN 111579636 A CN111579636 A CN 111579636A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
Abstract
The present invention is a parity interleaved leakage flux detector comprising: the two ends of the main body supporting structure are respectively and fixedly provided with a front coupler and a rear coupler; a plurality of odd-even staggered magnetic leakage detection modules for detect the pipe wall defect, odd-even staggered magnetic leakage detection module is including detecting the box, and two adjacent odd-even staggered magnetic leakage detection modules's detection box is staggered arrangement around along circumference, is convenient for improve and detects coverage. According to the invention, the detection boxes of two adjacent odd-even staggered magnetic flux leakage detection modules are arranged in a staggered manner, so that the layout space of the internal sensors of the adjacent detection boxes in a non-diameter-reducing state is reduced, the detection blind area is reduced or even eliminated, and the circumferential detection coverage range is enlarged; the odd-even staggered type magnetic flux leakage detection module adopts a suspension structure design, the whole module can be reduced in diameter or any one end can be reduced in diameter, and the passing capacity and the detection precision are improved.
Description
Technical Field
The invention relates to the technical field of detectors in pipelines, in particular to an odd-even staggered flux leakage detector.
Background
The pipeline is an important mode for long-distance transportation of petroleum and natural gas, the pipeline works under high pressure, long distance and severe external environment, various defects are generated on the pipe wall due to various reasons such as transmission medium corrosion, stress, construction damage, natural disasters and the like, the defects have great harmfulness to the safe operation of the pipeline, and early detection of the defects is an important means for maintaining the maintenance work of the pipeline and the integrity of the pipeline. At present, a common in-service detection method for pipeline defects is an in-pipeline detection technology, in particular a magnetic flux leakage detection technology.
The magnetic leakage detection means that after the ferromagnetic material is magnetized, a magnetic leakage field is formed on the surface of the ferromagnetic material due to the defects on the detected surface or the near surface, a magnetic induction sensor such as a Hall sensor is used for obtaining a magnetic leakage field signal, then the magnetic leakage field signal is sent to a computer for signal processing, and the magnetic flux density component of the magnetic leakage field is analyzed so that the corresponding defect characteristics such as position, width, depth and the like can be further known.
The detection boxes of the existing magnetic flux leakage detector are mostly kept in a relatively fixed state with a main body supporting structure and are limited by the structure of the detection boxes, and certain layout space is formed between the internal sensors of the adjacent detection boxes. In order to improve the detection precision, the technical scheme that the detection box floats inwards and outwards relative to the main body supporting structure along with the change of the pipe diameter and is always attached to the inner wall of the detected pipeline is provided, however, the change of the pipe diameter in the scheme means the change of the detection range, and if the detection box is directly arranged according to the traditional circumferential arrangement mode, a certain detection blind area exists when the pipeline with the larger pipe diameter is detected.
Disclosure of Invention
The present invention is directed to solve the disadvantages of the prior art and to provide an even-odd interleaved leakage flux detector.
In order to achieve the purpose, the invention adopts the following technical scheme:
a parity interleaved leakage flux detector comprising:
the two ends of the main body supporting structure are respectively and fixedly provided with a front coupler and a rear coupler;
a plurality of odd-even staggered magnetic leakage detection modules for detect the pipe wall defect, odd-even staggered magnetic leakage detection module both ends link to each other with preceding shaft coupling and back shaft coupling respectively, and odd-even staggered magnetic leakage detection module arranges around main part bearing structure circumference, and odd-even staggered magnetic leakage detection module is including detecting the box, and the detection box of two adjacent odd-even staggered magnetic leakage detection modules is staggered arrangement around circumference, is convenient for improve and detects coverage.
Further, odd-even staggered magnetic flux leakage detection module includes the magnetic conduction module, detects the box and is located the middle part in the magnetic conduction module outside, and the both ends in the magnetic conduction module outside set firmly anterior magnet module and rear portion magnet module respectively.
Furthermore, two ends of the odd-even staggered magnetic flux leakage detection module are respectively connected with the front coupler and the rear coupler through the suspension mechanism, so that the detection box can conveniently float along the radial direction along with the change of the inner diameter of the pipeline to be detected.
Further, suspension mechanism includes preceding movable part and back movable part, and preceding movable part links to each other with preceding shaft coupling and anterior magnet module, and back movable part links to each other with back shaft coupling and rear portion magnet module.
Furthermore, the front movable part comprises a support, the support is fixedly connected with the front coupler, a traction plate is arranged between the support and the front magnet module, two ends of the traction plate are hinged to the support and the front magnet module respectively, and the traction plate is connected with a front elastic mechanism to support the front magnet module outwards.
Further, the one end that tractive board and support link to each other extends and has swing arm and swing arm tip to articulate there is the pull rod, has set firmly the limiting plate on the support, and the pull rod runs through the limiting plate setting, and preceding elastic mechanism is preceding spring, and preceding spring housing is established in the pull rod outside, and the one end of preceding spring offsets with the limiting plate and the other end carries on spacingly through the lock nut of pull rod tip.
Furthermore, the front elastic mechanism is a torsion spring which is positioned at a hinge shaft connected with the traction plate and the bracket.
Furthermore, the rear elastic mechanism is of an elastic sleeve structure, and two ends of the elastic sleeve structure are respectively hinged with the rear coupler and the rear magnet module.
Further, the elastic sleeve structure is a hydraulic spring.
Furthermore, the odd-even staggered type magnetic flux leakage detection module is provided with a plurality of pulleys which are convenient for reducing the advancing resistance, and the pulleys are positioned on two sides of the detection box.
The invention has the beneficial effects that:
1. the invention adopts a modular design and consists of a plurality of independent and same detection modules, and different numbers of independent detection modules can be arranged for the detection of pipelines with different calibers so as to form detectors with different calibers, so that the application range is wider;
2. the detection boxes of the two adjacent odd-even staggered magnetic flux leakage detection modules are arranged in a staggered manner, so that the layout space of the sensors inside the adjacent detection boxes in a non-diameter-reducing state is reduced, the detection blind area is reduced or even eliminated, and the circumferential detection coverage range is enlarged;
3. the odd-even staggered type magnetic flux leakage detection module adopts a suspension structure design, the whole module can be reduced in diameter or any one end can be reduced in diameter, and the passing capacity and the detection precision are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an odd-even interleaved leakage flux detection module;
in the figure: 1-front coupling; 2-a scaffold; 3-pulling the plate; 4-front magnet module; 5-a detection kit; 6-rear magnet module; 7-elastic sleeve structure; 8-rear coupling; 9-a pull rod; 10-a front spring; 11-a stop nut; 12-a magnetic conducting module;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown, a parity interleaved leakage flux detector includes:
the two ends of the main body supporting structure are respectively and fixedly provided with a front coupler 1 and a rear coupler 8;
a plurality of odd-even staggered magnetic leakage detection modules for detect the pipe wall defect, odd-even staggered magnetic leakage detection module both ends link to each other with preceding shaft coupling 1 and back shaft coupling 8 respectively, and odd-even staggered magnetic leakage detection module arranges around main part bearing structure circumference, and odd-even staggered magnetic leakage detection module is including detecting box 5, and staggered arrangement around circumference is followed to two adjacent odd-even staggered magnetic leakage detection module's detection box 5, is convenient for improve and detects coverage.
Further, the odd-even staggered magnetic flux leakage detection module comprises a magnetic conduction module 12, the detection box 5 is located in the middle of the outer side of the magnetic conduction module 12, and the front magnet module 4 and the rear magnet module 6 are fixedly arranged at two ends of the outer side of the magnetic conduction module 12 respectively.
Furthermore, two ends of the odd-even staggered magnetic flux leakage detection module are respectively connected with the front coupler 1 and the rear coupler 8 through the suspension mechanism, so that the detection box 5 can float along the radial direction along with the change of the inner diameter of the pipeline to be detected.
Further, suspension mechanism includes preceding movable part and back movable part, and preceding movable part links to each other with preceding shaft coupling 1 and anterior magnet module 4, and back movable part links to each other with back shaft coupling 8 and rear portion magnet module 6.
Further, preceding movable part includes support 2, support 2 and preceding shaft coupling 1 fixed connection, is equipped with tractive board 3 between support 2 and the anterior magnet module 4, and the both ends of tractive board 3 are articulated with support 2 and anterior magnet module 4 respectively, even have preceding elastic mechanism on the tractive board 3, are convenient for prop anterior magnet module 4 to the outside.
Further, the one end that tractive board 3 links to each other with support 2 extends and has the swing arm and the swing arm tip articulates there is pull rod 9, has set firmly the limiting plate on the support 2, and pull rod 9 runs through the limiting plate setting, and preceding elastic mechanism is preceding spring 10, and preceding spring 10 cover is established in the pull rod 9 outside, and the one end of preceding spring 10 offsets with the limiting plate and the other end carries on spacingly through the lock nut 11 of pull rod 9 tip.
Furthermore, the front elastic mechanism is a torsion spring which is arranged at a hinge shaft connecting the traction plate 3 and the bracket 2.
Furthermore, the rear elastic mechanism is an elastic sleeve structure 7, and two ends of the elastic sleeve structure 7 are respectively hinged with the rear coupler 8 and the rear magnet module 6.
Further, the elastic sleeve structure 7 is a hydraulic spring.
Furthermore, the odd-even staggered type magnetic flux leakage detection module is provided with a plurality of pulleys which are convenient for reducing the running resistance, and the pulleys are positioned on two sides of the detection box 5.
When the invention is used, under the tensioning action of the front spring 10, the pull rod 9 is under the pulling force of one side far away from the swing arm, and the pull rod 9 pulls the traction plate 3 through the swing arm to jack the front end of the odd-even staggered type magnetic flux leakage detection module outwards; the rear end of the odd-even staggered type magnetic flux leakage detection module is also jacked outwards under the action of the elastic sleeve structure 7, and the detection box 5 is always attached to the inner wall of the detected pipeline under the combined action of the odd-even staggered type magnetic flux leakage detection module and the elastic sleeve structure, so that the detection precision is improved.
Under the non-reducing state, the inner diameter of the pipeline to be detected is larger under the state, and because the detection boxes 5 of the two adjacent odd-even staggered type magnetic flux leakage detection modules are staggered front and back along the circumferential direction, the layout space of the sensors in the adjacent detection boxes 5 under the state can be reduced or eliminated, even a certain overlapping detection area exists between the two detection boxes, so that the detection blind area is reduced or even eliminated, and the circumferential detection coverage is enlarged.
When the pipeline internal diameter through diminishes, the pipe wall presses whole odd-even staggered magnetic leakage detection module to the inboard, and preceding spring 10 and elastic sleeve structure 7 atress compression realize detecting the undergauge action of box 5, and the undergauge passes through the back, and when external force elimination, preceding spring 10 and elastic sleeve structure 7 reset, continue to guarantee to detect box 5 and laminate with the inner wall of being surveyed the pipeline all the time.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and variations are within the scope of the invention.
Claims (10)
1. A parity interleaved leakage flux detector comprising:
the device comprises a main body supporting structure, wherein a front coupler (1) and a rear coupler (8) are fixedly arranged at two ends of the main body supporting structure respectively;
a plurality of odd-even staggered magnetic leakage detection modules for detect the pipe wall defect, odd-even staggered magnetic leakage detection module both ends link to each other with preceding shaft coupling (1) and back shaft coupling (8) respectively, odd-even staggered magnetic leakage detection module arranges around main part bearing structure circumference, odd-even staggered magnetic leakage detection module is including detecting box (5), staggered arrangement around circumference is followed in detection box (5) of two adjacent odd-even staggered magnetic leakage detection modules, be convenient for improve and detect coverage.
2. The odd-even staggered flux leakage detector according to claim 1, wherein the odd-even staggered flux leakage detection module comprises a magnetic conduction module (12), the detection box (5) is located in the middle of the outer side of the magnetic conduction module (12), and the front magnet module (4) and the rear magnet module (6) are fixedly arranged at two ends of the outer side of the magnetic conduction module (12) respectively.
3. The even-odd staggered flux leakage detector according to claim 2, wherein both ends of the even-odd staggered flux leakage detection module are respectively connected with the front coupler (1) and the rear coupler (8) through suspension mechanisms, so that the detection box (5) can float along the radial direction along with the change of the inner diameter of the pipeline to be detected.
4. The odd-even interleaved leakage flux detector according to claim 3, wherein the suspension mechanism includes a front movable portion connected to the front coupling (1) and the front magnet module (4), and a rear movable portion connected to the rear coupling (8) and the rear magnet module (6).
5. The odd-even staggered flux leakage detector according to claim 4, wherein the front movable part comprises a bracket (2), the bracket (2) is fixedly connected with the front coupler (1), a pulling plate (3) is arranged between the bracket (2) and the front magnet module (4), two ends of the pulling plate (3) are respectively hinged with the bracket (2) and the front magnet module (4), and the pulling plate (3) is connected with a front elastic mechanism so as to be convenient for supporting the front magnet module (4) to the outer side.
6. The even-odd staggered flux leakage detector according to claim 5, wherein a swing arm extends from one end of the pulling plate (3) connected with the support (2), the end part of the swing arm is hinged with a pull rod (9), a limiting plate is fixedly arranged on the support (2), the pull rod (9) penetrates through the limiting plate, the front elastic mechanism is a front spring (10), the front spring (10) is sleeved on the outer side of the pull rod (9), one end of the front spring (10) abuts against the limiting plate, and the other end of the front spring is limited through a stop nut (11) at the end part of the pull rod (9).
7. The even-odd staggered flux leakage detector according to claim 5, wherein the front resilient mechanism is a torsion spring located at a hinge shaft where the pulling plate (3) is connected to the bracket (2).
8. The even-odd staggered flux leakage detector according to claim 4, wherein the rear elastic mechanism is an elastic sleeve structure (7), and both ends of the elastic sleeve structure (7) are respectively hinged with the rear coupler (8) and the rear magnet module (6).
9. Odd-even interleaved leakage flux detector according to claim 8, c h a r a c t e r i z e d in that the resilient sleeve structure (7) is a hydraulic spring.
10. The even-odd staggered flux leakage detector according to any one of claims 3 to 9, wherein the even-odd staggered flux leakage detection module is provided with a plurality of pulleys for reducing a running resistance, and the pulleys are located on both sides of the detection box (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586304.6A CN111579636A (en) | 2020-06-24 | 2020-06-24 | Odd-even staggered magnetic flux leakage detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586304.6A CN111579636A (en) | 2020-06-24 | 2020-06-24 | Odd-even staggered magnetic flux leakage detector |
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| CN111579636A true CN111579636A (en) | 2020-08-25 |
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| CN202010586304.6A Pending CN111579636A (en) | 2020-06-24 | 2020-06-24 | Odd-even staggered magnetic flux leakage detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118818A (en) * | 2019-06-11 | 2019-08-13 | 智云安科技(北京)有限公司 | A kind of detection unit misplaces the pipeline ultra high-definition leakage magnetic detection device of arrangement end to end |
| KR20220116923A (en) * | 2021-02-16 | 2022-08-23 | 한국가스공사 | In-line pipe inspection apparatus |
| WO2023193330A1 (en) * | 2022-04-08 | 2023-10-12 | 南京派光高速载运智慧感知研究院有限公司 | Magnetic flux leakage detection mechanism for pipeline detection |
-
2020
- 2020-06-24 CN CN202010586304.6A patent/CN111579636A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118818A (en) * | 2019-06-11 | 2019-08-13 | 智云安科技(北京)有限公司 | A kind of detection unit misplaces the pipeline ultra high-definition leakage magnetic detection device of arrangement end to end |
| KR20220116923A (en) * | 2021-02-16 | 2022-08-23 | 한국가스공사 | In-line pipe inspection apparatus |
| KR102488396B1 (en) * | 2021-02-16 | 2023-01-13 | 한국가스공사 | In-line pipe inspection apparatus |
| WO2023193330A1 (en) * | 2022-04-08 | 2023-10-12 | 南京派光高速载运智慧感知研究院有限公司 | Magnetic flux leakage detection mechanism for pipeline detection |
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