WO2006130050A1 - Systeme magnetique d'un detecteur de defauts a l'interieur de tuyaux - Google Patents

Systeme magnetique d'un detecteur de defauts a l'interieur de tuyaux Download PDF

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Publication number
WO2006130050A1
WO2006130050A1 PCT/RU2006/000296 RU2006000296W WO2006130050A1 WO 2006130050 A1 WO2006130050 A1 WO 2006130050A1 RU 2006000296 W RU2006000296 W RU 2006000296W WO 2006130050 A1 WO2006130050 A1 WO 2006130050A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
magnetic field
poles
permanent magnets
magnets
Prior art date
Application number
PCT/RU2006/000296
Other languages
English (en)
Russian (ru)
Inventor
Alexandr Maximilyanovich Popovich
Mikhail Dmitrievich Kostkin
Svyatoslav Evegenievich Lisin
Original Assignee
Popovich Alexandr Maximilyanov
Mikhail Dmitrievich Kostkin
Svyatoslav Evegenievich Lisin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Popovich Alexandr Maximilyanov, Mikhail Dmitrievich Kostkin, Svyatoslav Evegenievich Lisin filed Critical Popovich Alexandr Maximilyanov
Publication of WO2006130050A1 publication Critical patent/WO2006130050A1/fr

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Classifications

    • 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

Definitions

  • the invention relates to the field of magnetic flaw detection of steel pipelines by examining the scattering magnetic fields using probes moving inside the pipe.
  • the closest in design is the in-pipe flaw detector magnetic system described in Russian Patent RU 2133032, “Method for Magnetic Flaw Detection and a Device for Performing this Method”, G01 N 27/83, publication July 10, 1999.
  • the flaw detector magnetic system contains an annular magnetic circuit, permanent magnets located on both ends of the manifold, and ring brush pole pieces in contact with the inner surface of the pipeline.
  • the inventive magnetic system of an in-line flaw detector in both embodiments allows you to adjust the magnetic field strength in the magnetic circuit, which increases the uniformity of the scattering magnetic field in the pipe under study, and, as a result, increases the sensitivity of the flaw detector, which in turn allows you to evaluate the emerging pipeline defects.
  • the magnetic system of an in-line flaw detector includes a source of a constant magnetic field in the form of two permanent magnets, located axially, facing each other the poles of which have opposite polarity.
  • the outer poles of the magnets are connected to the magnetic cores, including, on the side of the poles of the said magnets, devices for adjusting the magnetic field strength.
  • Mashitoprovody made in the form of disks, on the side surface of which are fixed brushes with the possibility of mechanical contact with the inner surface of the studied pipe.
  • an elastic magnetically permeable element is installed, which serves to press each of the aforementioned magnet to the corresponding device for adjusting the magnetic field strength and the latter to the disk.
  • the poles of the permanent magnet are connected to devices for adjusting the magnetic field strength, which in special cases can be in the form of washers with holes or recesses.
  • the area and distribution of holes or recesses in the devices for adjusting the magnetic field strength is selected so that the tension in the disks - magnetic cores is the same, despite the fact that each of the magnets may have a different level of magnetic field strength.
  • the device for adjusting the magnetic field strength can be performed in the body of the magnetic circuit, in particular in the form of recesses in the disk from the side of the pole of the permanent magnet.
  • an elastic magnetically permeable element serves to press each magnet to the corresponding device for adjusting the magnetic field strength, and if the device for adjusting the magnetic field strength is made in the form of a separate element, for example, a washer, then this element to the disk. is he allows you to maintain tight contact between them and prevents gaps due to shocks or vibrations that occur when the flaw detector is moving. It is also important that the magnetic cores are made in the form of disks with many brushes located on the side surface of the disks, which also allows you to create a uniform field in the entire circular segment of the pipe that the brushes touch.
  • Permanent magnets are most appropriate to perform cylindrical.
  • permanent magnets can be installed in a housing made of non-magnetic material. In this case, they can be separated from the housing by damping elements.
  • FIG. 1 shows a section through a magnetic system
  • FIG. 2 the system is shown in side view.
  • FIG. 3 shows an embodiment of a device for adjusting the magnetic field in the form of a washer with holes
  • FIG. 4 device for adjusting the magnetic field in the form of recesses in the disk.
  • the magnetic system of the in-tube flaw detector in the best embodiment includes a constant magnetic field source 1 in the form of two cylindrical permanent magnets 2 located axially.
  • the outer poles of the magnets 2 (N and S) through the device 3 for adjusting the magnetic field in the form of washers 9 are connected to the disks 4.
  • an elastic magnetically permeable element 6, used to press each magnet 2 to the washer 9 and it to the disk 4.
  • Magnets 2 are installed in the housing 7 of non-magnetic material, between the wall of the housing 7 and the magnets 2 there are damping elements 8. Sensors 13 of the magnetic field of dispersion are installed between the rows of brushes 5 mounted on the disks 4.
  • One embodiment of the magnetic field strength adjusting device 3 shown in FIG. 3 is a washer 9 with openings 10. Holes 10 or recesses in the soft magnetic material of the washer 9 are made so thick as to provide the necessary magnetic field strength in the disk 4 of the magnetic circuit. The holes 10, as a rule, are performed symmetrically with respect to the axis of the washer 9, in order to ensure a uniform and symmetrical dispersion field in the walls of the pipe 12.
  • the device for adjusting the magnetic field strength can be performed directly in the part of the magnetic circuit, that is, in the disk 4, as shown in FIG. 4.
  • a series of recesses 11 are performed, which act as a regulator of the magnetic flux intensity.
  • this embodiment of the adjustment element requires changing the entire disk 4, and not a relatively small part, the washer 9.
  • the magnetic system of the in-line flaw detector operates as follows. In the process of preparing the flaw detector for operation, the magnetic field is checked at each of the disks 4 or at the ends of the brushes 5 of each of the disks 4. By selecting washers 9 with a different number of holes 10, a uniform magnetic field in the disks 4 is obtained and, therefore, the magnetic field of dispersion in the test tube. It should be borne in mind that permanent magnets have a magnetic force may change during operation, so that the adjustment operation can be performed repeatedly.
  • the permanent magnets 2 are protected from vibrations and shocks due to the presence of an elastic magnetically permeable element 6 and damping elements 8.
  • the proposed system for adjusting the magnetic field strength can be used in magnetic systems of an in-tube flaw detector with an air gap.
  • the entire design of the magnetic system of the in-line flaw detector is simple and symmetrical, which allows you to create a fairly powerful symmetric scattering field.
  • the magnetic flux is created by only two powerful permanent magnets that are connected to the magnetic circuit so that the magnetic flux losses are minimal and the scattering magnetic field is symmetrical.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

L'invention appartient au domaine de la détection des défauts de tuyaux en acier par l'exploration des champs magnétiques de diffusion au moyen de sondes disposées à l'intérieur du tuyau. Le système magnétique d'un détecteur de défauts à l'intérieur d'un tuyau comprend une source de champ magnétique permanent se présentant comme deux aimants permanents disposés axialement et dont les pôles, orientés l'un vers l'autre, ont des polarités opposées. Les pôles externes des aimants sont reliés aux conducteurs magnétiques qui comprennent, du côté desdites aimants, des dispositifs de réglage d'intensité du champ magnétique. Les conducteurs magnétiques se présentent comme des disques à la surface latérale desquels on a monté des balais ayant la possibilité d'un contact magnétique avec la surface interne du tuyau à examiner. Entre les pôles opposés des aimants permanents on a monté un élément souple magnétiquement perméable qui sert à presser chacun desdits aimants contre un dispositif de réglage d'intensité du champ magnétique correspondant et à presser ce dernier contre le disque.
PCT/RU2006/000296 2005-06-03 2006-06-02 Systeme magnetique d'un detecteur de defauts a l'interieur de tuyaux WO2006130050A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2005118119/28A RU2293314C1 (ru) 2005-06-03 2005-06-03 Магнитная система внутритрубного дефектоскопа
RU2005118119 2005-06-03

Publications (1)

Publication Number Publication Date
WO2006130050A1 true WO2006130050A1 (fr) 2006-12-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2006/000296 WO2006130050A1 (fr) 2005-06-03 2006-06-02 Systeme magnetique d'un detecteur de defauts a l'interieur de tuyaux

Country Status (2)

Country Link
RU (1) RU2293314C1 (fr)
WO (1) WO2006130050A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2249355A2 (fr) * 2009-05-07 2010-11-10 PII Limited Ensemble d'aimantation
US8730972B2 (en) 2007-04-04 2014-05-20 Blackberry Limited Method, system and apparatus for dynamic quality of service modification
RU196047U1 (ru) * 2019-07-16 2020-02-14 Общество с ограниченной ответственностью "ЮЛТА" Трос для щеток прибора для очистки и внутритрубной диагностики магистральных трубопроводов

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051344A1 (fr) * 1980-10-17 1982-05-12 British Gas Corporation Assemblage des aimants pour un véhicule d'inspection de canalisation
US5402065A (en) * 1991-10-14 1995-03-28 British Gas Plc Foil assembly for magnetic inspection machines
RU2133032C1 (ru) * 1997-03-20 1999-07-10 Закрытое акционерное общество Инженерный центр "ВНИИСТ-ПОИСК" Способ магнитной дефектоскопии и устройство для осуществления этого способа

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051344A1 (fr) * 1980-10-17 1982-05-12 British Gas Corporation Assemblage des aimants pour un véhicule d'inspection de canalisation
US5402065A (en) * 1991-10-14 1995-03-28 British Gas Plc Foil assembly for magnetic inspection machines
RU2133032C1 (ru) * 1997-03-20 1999-07-10 Закрытое акционерное общество Инженерный центр "ВНИИСТ-ПОИСК" Способ магнитной дефектоскопии и устройство для осуществления этого способа

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8730972B2 (en) 2007-04-04 2014-05-20 Blackberry Limited Method, system and apparatus for dynamic quality of service modification
EP2249355A2 (fr) * 2009-05-07 2010-11-10 PII Limited Ensemble d'aimantation
EP2249355A3 (fr) * 2009-05-07 2013-08-07 PII Limited Ensemble d'aimantation
RU196047U1 (ru) * 2019-07-16 2020-02-14 Общество с ограниченной ответственностью "ЮЛТА" Трос для щеток прибора для очистки и внутритрубной диагностики магистральных трубопроводов

Also Published As

Publication number Publication date
RU2293314C1 (ru) 2007-02-10

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