WO2007075126A1 - Mechanism for fixing a sensor to an in-line flaw detector body - Google Patents

Mechanism for fixing a sensor to an in-line flaw detector body Download PDF

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Publication number
WO2007075126A1
WO2007075126A1 PCT/RU2006/000686 RU2006000686W WO2007075126A1 WO 2007075126 A1 WO2007075126 A1 WO 2007075126A1 RU 2006000686 W RU2006000686 W RU 2006000686W WO 2007075126 A1 WO2007075126 A1 WO 2007075126A1
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Prior art keywords
lever
sensor
flaw detector
levers
mechanism according
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PCT/RU2006/000686
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French (fr)
Russian (ru)
Inventor
Alexandr Maximilyanovich Popovich
Mikhail Dmitrievich Kostkin
Svyatoslav Evgenievich Lisin
Original Assignee
Popovich Alexandr Maximilyanov
Mikhail Dmitrievich Kostkin
Svyatoslav Evgenievich Lisin
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Application filed by Popovich Alexandr Maximilyanov, Mikhail Dmitrievich Kostkin, Svyatoslav Evgenievich Lisin filed Critical Popovich Alexandr Maximilyanov
Publication of WO2007075126A1 publication Critical patent/WO2007075126A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013Arrangements for scanning
    • G01N27/902Arrangements for scanning by moving the sensors

Definitions

  • the invention relates to a device for in-line non-destructive testing of pipelines, and more specifically to a device for attaching a sensor of an in-line flaw detector.
  • flaw detector sensors are installed concentrically around the perimeter of the flaw detector body in order to block its entire surface during the monitoring of the condition of the pipe.
  • the pipe is not an ideal body.
  • the in-line flaw detector passes rounding, pipe sections of different diameters or different wall thicknesses.
  • the mechanism of fastening the sensor of the in-tube flaw detector during its movement should ensure a tight fit of the sensor to the pipe wall and its constant orientation in the radial direction relative to the longitudinal axis of the flaw detector body.
  • the base is a flexible plate bent as a parallelogram, fixed in the middle to the base on the flaw detector housing.
  • One branch of the plate is a support for the sensors, the other supports support from bending from the pipe wall in the place where the sensors are fixed.
  • this flaw detector system Due to its stiffness in the transverse direction, this flaw detector system provides a constant orientation of these sensors in the radial direction, but poorly provides a constant the adhesion of the sensors to the surface of the pipe, because due to the rigidity of the system can only track small changes in diameter.
  • IPC G01 N 027/72 contains sensors mounted on holders, each of which is mounted on the flaw detector housing with a pair of levers.
  • the levers are spaced in the longitudinal direction in a plane passing through the axis of symmetry of the flaw detector and are able to rotate in this plane.
  • Each specified lever has an axis of rotation at the point of attachment of the holder to the lever and at the place of attachment of the lever to the housing.
  • the holder together with the sensors are made according to the scheme
  • This design of mounting sensors ensures that they are pressed during movement along straight sections of the pipeline, including when changing the diameter of the pipe, since the sensor due to the lever system and swivel joints can repeat changes in the profile of the pipe walls. But the design has a relatively low resistance to lateral influences, as two levers are attached at the base and body almost at one point. When passing roundings or protrusions in the pipe wall, the base may shift away from the desired path of movement, in addition, the sensors may lose contact with the wall.
  • the claimed invention solves the problem of ensuring constant contact of the sensor with the pipe wall, both in straight sections, and in roundings and in places where the diameter of the pipe changes.
  • the sensor mounting mechanism provides an almost constant longitudinal position of the sensor relative to the flaw detector body with significant changes in the diameter of the studied pipe, which makes it possible to accurately determine the coordinates of the defects.
  • the mechanism for attaching the sensor to the body of the in-line flaw detector comprises a first two-arm lever, at the end of the first arm of which a sensor is fixed, a second lever, one end of which is pivotally attached to the hinge support of the first lever, and the second end is pivotally mounted on the body.
  • the mechanism also includes a third lever, one end of which is pivotally attached to the end of the second shoulder of the first lever, and the second end is pivotally mounted on the housing and a fourth lever, which is pivotally attached to the flaw detector housing at one point of the third lever and the other end is pivotally attached to the end the second lever at the location of the support, dividing the third lever into two shoulders.
  • the third and fourth levers and the corresponding shoulders of the first and second levers form a rhombus, in the diagonal of which a spring is attached to the levers, which works in tension and ensures that the sensor is pressed against the inner wall of the pipe under study.
  • the sensor is stable in the transverse direction, since the support points of the mechanism to the body are spaced.
  • the mechanism allows the sensor to move in the vertical direction with practically no displacement of the sensor in the longitudinal direction relative to the flaw detector body, since the attachment point of the sensor does not move along the radius, as usual in sensor attachment systems, but vertically.
  • the mechanism for attaching the sensor to the housing has such a structure that it develops, and the impact energy is absorbed by the spring mechanism.
  • the mechanism is made with swivel joints made with the possibility of moving the said levers in the same plane.
  • the places of attachment to the body of the second lever and the third and fourth are located on the body in the same plane passing through the axis of symmetry of the flaw detector body. This arrangement allows for the stability of the sensor in the transverse direction.
  • the mounting location of the third and fourth arm is located in the direction of the flaw detector in front of the mounting location to the housing of the second arm.
  • the spring is installed in the diagonal of a rhombus formed by levers, which is parallel to the body.
  • the ends of the said springs can be fixed at the respective ends of the third and fourth levers.
  • the hinged mounting of the sensor to the first lever and the hinged mounting of the second lever to the housing are located in the same plane, perpendicular to the axis of the flaw detector.
  • the sensor can be mounted on the first lever with the possibility of rotation, while it more accurately monitors pipe irregularities.
  • a number of sensor mounting mechanisms are installed on the flaw detector housing, located in planes passing through the axis of symmetry of the flaw detector housing, in order to cover the entire pipe forming with measuring sensors.
  • FIG. 1 is a diagram of a sensor mounting mechanism.
  • FIG. 2 front view of the mechanism.
  • the sensor mounting mechanism (Fig. 1 and Fig. 2) contains a first two-arm lever 1, at the end of the first arm of which a sensor 5 is fixed, a second two-arm lever 2, a third lever 3 and a fourth lever 4.
  • the ends of the levers 3 and 4 are connected by a spring 6.
  • Levers 3 and 4 by a hinge 12 are attached to the base 8 of the housing 7.
  • the lever 3 by a hinge 11 attached to the end of the first lever, the lever 4 by means of a hinge 9 is attached to the fulcrum of the second lever.
  • the second lever 2 by means of a hinge is attached to the fulcrum of the first lever 1.
  • lever 2 To the base 8 is also pivotally attached lever 2, the fastening point of which is located along the flaw detector behind the fastening point of the third 3 and fourth 4 levers.
  • the third 3 and fourth 4 levers and the corresponding shoulders of the first 1 and second 2 levers form a rhombus.
  • the hinged mounting of the sensor 5 to the first lever 1 and the hinged mounting of the second lever 2 to the body are located in one plane 14 extending perpendicular to the axis of the flaw detector body 7.
  • a number of mounting mechanisms for sensors 5 are installed, located in planes passing through the axis of symmetry of the casing 7 of the flaw detector.
  • the hinges of the mechanism can be strengthened, for example, using flexible flat plates or other means of reinforcement.
  • the fastening mechanism operates as follows.
  • the sensor When the flaw detector moves in the pipe, the sensor, by means of a lever mechanism, is pressed against the inner wall of the pipe 13, due to the tensile spring 6.
  • the sensor 5 When changing the diameter of the pipe 13, the sensor 5 moves, maintaining its position relative to the flaw detector body 7 in a longitudinal section, that is, its attachment point moves in the plane 14.
  • the mounting mechanism of the sensors allows you to track pipe bumps, changes in its diameter, while maintaining the position of the sensor 5 also in a plane passing through the axis of symmetry of the flaw detector body 7. All the mechanisms for mounting sensors 5 installed along the generatrix of the housing 7 also work (Fig. 2).

Abstract

The invention relates to devices for in-line non-distructive inspection of pipelines, more specifically to a mechanism for fixing an in-line flaw detector sensor. The inventive mechanism comprises a double-arm lever provided with a sensor fixed to the end of first arm thereof, and a second lever, one end of which is hingedly connected to the hinged support of the first lever and the second end is hingedly fixed to the body. Said mechanism also comprises a third lever, the end of which is hingedly connected to the end of the second arm of the first lever and the second end is hingedly fixed to the body and a fourth lever whose one end is hingedly fixed to the flaw detector body, where said third lever is fastened, whereas the other end thereof is hingedly connected to the second lever, where the support is arranged and divides the third lever into two arms. The first and fourth levers and the corresponding arms of the first and second levers form a rhombus in a diagonal of which the levers are connected to a spring which works in tension and presses the sensor to the internal wall of an inspected pipe.

Description

Механизм крепления датчика к корпусу внутритрубного дефектоскопа The mechanism for mounting the sensor to the body of the in-line flaw detector
Изобретение относится к устройствам для внутритрубного неразрушающего контроля трубопроводов, точнее к устройству механизма крепления датчика внутритрубного дефектоскопа.The invention relates to a device for in-line non-destructive testing of pipelines, and more specifically to a device for attaching a sensor of an in-line flaw detector.
Как правило, датчики дефектоскопа устанавливаются концентрично по периметру корпуса дефектоскопа для того, чтобы в процессе контроля состояния трубы перекрыть всю ее поверхность. Однако труба не представляет собой идеальное тело. В процессе движения внутритрубный дефектоскоп проходит закругления, участки трубы различного диаметра или различной толщины стенок.As a rule, flaw detector sensors are installed concentrically around the perimeter of the flaw detector body in order to block its entire surface during the monitoring of the condition of the pipe. However, the pipe is not an ideal body. In the process of movement, the in-line flaw detector passes rounding, pipe sections of different diameters or different wall thicknesses.
Механизм крепления датчика внутритрубного дефектоскопа в процессе его движения должен обеспечить плотное прилегание датчика к стенке трубы и постоянную его ориентацию в радиальном направлении относительно продольной оси корпуса дефектоскопа.The mechanism of fastening the sensor of the in-tube flaw detector during its movement should ensure a tight fit of the sensor to the pipe wall and its constant orientation in the radial direction relative to the longitudinal axis of the flaw detector body.
Известны различные системы датчиков внутритрубного дефектоскопа.Various sensor systems for an in-line flaw detector are known.
Система датчиков по патенту США 4330748, публикация 18 мая 1982 года, МПК: G01 R 033/00; G01 N 027/72; G01 N 027/82, а также патенту СШАThe sensor system according to US patent 4330748, publication May 18, 1982, IPC: G01 R 033/00; G01 N 027/72; G01 N 027/82, as well as US patent
4468619, публикация 28 августа 1984, МПК G01N 027/82, содержит датчики, установленные на основания - салазки и расположенные по периметру корпуса дефектоскопа. Основание представляет собой согнутую в виде параллелограмма гибкую пластину, закрепленную посередине к основанию на корпусе дефектоскопа. Одна ветвь пластины является опорой для датчиков, другая поддерживает опору от отгибания от стенки трубы в месте закрепления датчиков.4468619, publication August 28, 1984, IPC G01N 027/82, contains sensors mounted on a base - a slide and located along the perimeter of the flaw detector housing. The base is a flexible plate bent as a parallelogram, fixed in the middle to the base on the flaw detector housing. One branch of the plate is a support for the sensors, the other supports support from bending from the pipe wall in the place where the sensors are fixed.
Данная система датчиков дефектоскопа благодаря своей жесткости в поперечном направлении обеспечивает постоянную ориентацию этих датчиков в радиальном направлении, однако плохо обеспечивает постоянное прилегание датчиков к поверхности трубы, так как из-за жесткости системы может отслеживать только малые изменения диаметра.Due to its stiffness in the transverse direction, this flaw detector system provides a constant orientation of these sensors in the radial direction, but poorly provides a constant the adhesion of the sensors to the surface of the pipe, because due to the rigidity of the system can only track small changes in diameter.
Система датчиков по патенту США 5864232, публикация 26 января 1999US 5,864,232 Sensor System, January 26, 1999
' года, МПК G01 N 027/72, содержит датчики, установленные на держателях, каждый из которых закреплен на корпусе дефектоскопа с помощью пары рычагов. Рычаги разнесены в продольном направлении в плоскости, проходящей через ось симметрии дефектоскопа и способны поворачиваться в этой плоскости. Каждый указанный рычаг имеет ось вращения в месте крепления держателя к рычагу и в месте крепления рычага к корпусу. Держатель вместе с датчиками выполнены по схеме'year, IPC G01 N 027/72, contains sensors mounted on holders, each of which is mounted on the flaw detector housing with a pair of levers. The levers are spaced in the longitudinal direction in a plane passing through the axis of symmetry of the flaw detector and are able to rotate in this plane. Each specified lever has an axis of rotation at the point of attachment of the holder to the lever and at the place of attachment of the lever to the housing. The holder together with the sensors are made according to the scheme
«пapaллeлoгpaммa», которая является устойчивой и благодаря своей жесткости в поперечном направлении обеспечивает постоянную ориентацию этих датчиков в радиальном направлении при прохождении прямолинейных участков трубопровода. Однако такая система не обеспечивает контакт датчиков при прохождении закруглений и в местах изменения диаметра трубы, так как основание датчиков практически может перемещаться только параллельно корпусу и не имеет возможности отслеживать изгибы трубы.“Parallelogram”, which is stable and due to its stiffness in the transverse direction, provides a constant orientation of these sensors in the radial direction when passing straight sections of the pipeline. However, such a system does not provide contact of the sensors when passing roundings and in places where the diameter of the pipe changes, since the base of the sensors can practically only move parallel to the body and does not have the ability to track pipe bends.
Патент России 2225977, публикация 20 марта 2004 года, МПК G01MЗ/08, F17D5/00, G01N27/72 является наиболее близким аналогом. Датчики установлены в держателях, установленных по периметру вокруг оси симметрии дефектоскопа. Каждый держатель датчиков закреплен на корпусе дефектоскопа с помощью пары рычагов, способных поворачиваться в плоскости, проходящей через ось симметрии дефектоскопа. В каждом держателе датчиков все датчики находятся со стороны хвостовой части дефектоскопа по отношению к обеим осям вращения пары рычагов в этом держателе датчиков. Расстояние между указанными осями вращения в держателе датчиков составляет не более 0,2 длины рычага.Russian patent 2225977, publication March 20, 2004, IPC G01MZ / 08, F17D5 / 00, G01N27 / 72 is the closest analogue. Sensors are installed in holders installed around the perimeter around the symmetry axis of the flaw detector. Each sensor holder is mounted on the flaw detector housing using a pair of levers that can rotate in a plane passing through the axis of symmetry of the flaw detector. In each sensor holder, all sensors are located on the tail of the flaw detector with respect to both axes of rotation of a pair of levers in this sensor holder. The distance between the indicated axes of rotation in the sensor holder is not more than 0.2 length of the lever.
Данная конструкция крепления датчиков обеспечивает их прижатие во время движения по прямолинейным участкам трубопровода, в том числе и при изменении диаметра трубы, так как датчик благодаря рычажной системе и шарнирным соединениям может повторять изменения профиля стенок трубы. Но конструкция обладает сравнительно малой устойчивостью к боковым воздействиям, так как два рычага, крепятся как у основания так и у корпуса практически в одной точке. При прохождении закруглений или выступов в стенке трубы основание может сместиться в сторону от необходимой траектории движения, кроме того, датчики могут потерять контакт со стенкой. Заявляемое изобретение решает задачу обеспечения постоянного контакта датчика со стенкой трубы, как на прямолинейных участках, так и в закруглениях и в местах изменения диаметра трубы. При этом механизм крепления датчика обеспечивает практически постоянное расположение датчика в продольном направлении относительно корпуса дефектоскопа при значительных изменениях диаметров исследуемой трубы, что дает возможность точного определения координат дефектов.This design of mounting sensors ensures that they are pressed during movement along straight sections of the pipeline, including when changing the diameter of the pipe, since the sensor due to the lever system and swivel joints can repeat changes in the profile of the pipe walls. But the design has a relatively low resistance to lateral influences, as two levers are attached at the base and body almost at one point. When passing roundings or protrusions in the pipe wall, the base may shift away from the desired path of movement, in addition, the sensors may lose contact with the wall. The claimed invention solves the problem of ensuring constant contact of the sensor with the pipe wall, both in straight sections, and in roundings and in places where the diameter of the pipe changes. In this case, the sensor mounting mechanism provides an almost constant longitudinal position of the sensor relative to the flaw detector body with significant changes in the diameter of the studied pipe, which makes it possible to accurately determine the coordinates of the defects.
Механизм крепления датчика к корпусу внутритрубного дефектоскопа по изобретению содержит первый двуплечий рычаг, на конце первого плеча которого закреплен датчик, второй рычаг, один конец которого шарнирно прикреплен к шарнирной опоре первого рычага, а второй конец шарнирно закреплен на корпусе. Механизм содержит также третий рычаг, один конец которого шарнирно прикреплен к концу второго плеча первого рычага, а второй конец шарнирно закреплен на корпусе и четвертый рычаг, который одним концом шарнирно закреплен на корпусе дефектоскопа в месте крепления упомянутого третьего рычага, а другим концом шарнирно прикреплен к второму рычагу в месте расположения опоры, делящей третий рычаг на два плеча. Третий и четвертый рычаги и соответствующие плечи первого и второго рычага образуют ромб, в диагонали которого к рычагам прикреплена пружина, которая работает на растяжение и обеспечивает прижатие датчика к внутренней стенке исследуемой трубы.The mechanism for attaching the sensor to the body of the in-line flaw detector according to the invention comprises a first two-arm lever, at the end of the first arm of which a sensor is fixed, a second lever, one end of which is pivotally attached to the hinge support of the first lever, and the second end is pivotally mounted on the body. The mechanism also includes a third lever, one end of which is pivotally attached to the end of the second shoulder of the first lever, and the second end is pivotally mounted on the housing and a fourth lever, which is pivotally attached to the flaw detector housing at one point of the third lever and the other end is pivotally attached to the end the second lever at the location of the support, dividing the third lever into two shoulders. The third and fourth levers and the corresponding shoulders of the first and second levers form a rhombus, in the diagonal of which a spring is attached to the levers, which works in tension and ensures that the sensor is pressed against the inner wall of the pipe under study.
Благодаря такой конструкции механизма обеспечивается устойчивость датчика в поперечном направлении, так как точки опоры механизма к корпусу разнесены. Кроме того, при изменении внутреннего диаметра трубы механизм обеспечивает перемещение датчика в вертикальном направлении практически без смещения датчика в продольном направлении относительно корпуса дефектоскопа, так как точка крепления датчика движется не по радиусу, как обычно в системах крепления датчиков, а вертикально. При ударе первого рычага о значительное по размерам препятствие внутри трубы, механизм крепления датчика к корпусу имеет такую конструкцию, что сложится, а энергия удара будет поглощена пружинным механизмом.Thanks to such a design of the mechanism, the sensor is stable in the transverse direction, since the support points of the mechanism to the body are spaced. In addition, when the inner diameter of the pipe is changed, the mechanism allows the sensor to move in the vertical direction with practically no displacement of the sensor in the longitudinal direction relative to the flaw detector body, since the attachment point of the sensor does not move along the radius, as usual in sensor attachment systems, but vertically. When the first lever strikes a significant obstacle inside the pipe, The mechanism for attaching the sensor to the housing has such a structure that it develops, and the impact energy is absorbed by the spring mechanism.
В частном случае выполнения, механизм выполнен с шарнирными соединениями, выполненными с возможностью перемещения упомянутых рычагов в одной и той же плоскости. Места крепления к корпусу второго рычага и третьего с четвертым расположены на корпусе в одной плоскости, проходящей через ось симметрии корпуса дефектоскопа. Такое расположение позволяет обеспечить устойчивость датчика в поперечном направлении. Кроме того, место крепления третьего и четвертого рычага расположено по ходу движения дефектоскопа впереди места крепления к корпусу второго рычага.In the particular case of execution, the mechanism is made with swivel joints made with the possibility of moving the said levers in the same plane. The places of attachment to the body of the second lever and the third and fourth are located on the body in the same plane passing through the axis of symmetry of the flaw detector body. This arrangement allows for the stability of the sensor in the transverse direction. In addition, the mounting location of the third and fourth arm is located in the direction of the flaw detector in front of the mounting location to the housing of the second arm.
Для устойчивой работы механизма прижима пружина установлена в диагонали ромба, образованного рычагами, которая расположена параллельно корпусу. Концы упомянутой пружины могут быть закреплены на соответствующих концах третьего и четвертого рычагов.For stable operation of the clamp mechanism, the spring is installed in the diagonal of a rhombus formed by levers, which is parallel to the body. The ends of the said springs can be fixed at the respective ends of the third and fourth levers.
Для более точного позиционирования датчика в продольном направлении шарнирное крепление датчика к первому рычагу и шарнирное крепление второго рычага к корпусу расположены в одной плоскости, проходящей перпендикулярно оси корпуса дефектоскопа.For more accurate positioning of the sensor in the longitudinal direction, the hinged mounting of the sensor to the first lever and the hinged mounting of the second lever to the housing are located in the same plane, perpendicular to the axis of the flaw detector.
Датчик может быть закреплен на первом рычаге с возможностью поворота, при этом он точнее отслеживает неровности трубы.The sensor can be mounted on the first lever with the possibility of rotation, while it more accurately monitors pipe irregularities.
На корпусе дефектоскопа устанавливается ряд механизмов крепления датчиков, расположенных в плоскостях, проходящих через ось симметрии корпуса дефектоскопа, для того чтобы перекрыть всю образующую трубы измерительными датчиками.A number of sensor mounting mechanisms are installed on the flaw detector housing, located in planes passing through the axis of symmetry of the flaw detector housing, in order to cover the entire pipe forming with measuring sensors.
Изобретение поясняется рисунками. На Фиг. 1 приведена схема механизма крепления датчика, На Фиг. 2, вид механизма спереди.The invention is illustrated by drawings. In FIG. 1 is a diagram of a sensor mounting mechanism. FIG. 2, front view of the mechanism.
Механизм крепления датчика (Фиг. 1 и Фиг. 2) содержит первый двуплечий рычаг 1 , на конце первого плеча которого закреплен датчик 5, второй двуплечий рычаг 2, третий рычаг 3 и четвертый рычаг 4. Концы рычагов 3 и 4 соединены пружиной 6. Рычаги 3 и 4 посредством шарнира 12 прикреплены к основанию 8 корпуса 7. Рычаг 3 посредством шарнира 11 прикреплен к концу первого рычага, рычаг 4 посредством шарнира 9 прикреплен к точке опоры второго рычага. Второй рычаг 2 посредством шарнира прикреплен к точке опоры первого рычага 1. К основанию 8 также шарнирно прикреплен рычаг 2, место крепления которого расположено по ходу движения дефектоскопа сзади места крепления третьего 3 и четвертого 4 рычагов. Третий 3 и четвертый 4 рычаги и соответствующие плечи первого 1 и второго 2 рычага образуют ромб.The sensor mounting mechanism (Fig. 1 and Fig. 2) contains a first two-arm lever 1, at the end of the first arm of which a sensor 5 is fixed, a second two-arm lever 2, a third lever 3 and a fourth lever 4. The ends of the levers 3 and 4 are connected by a spring 6. Levers 3 and 4 by a hinge 12 are attached to the base 8 of the housing 7. The lever 3 by a hinge 11 attached to the end of the first lever, the lever 4 by means of a hinge 9 is attached to the fulcrum of the second lever. The second lever 2 by means of a hinge is attached to the fulcrum of the first lever 1. To the base 8 is also pivotally attached lever 2, the fastening point of which is located along the flaw detector behind the fastening point of the third 3 and fourth 4 levers. The third 3 and fourth 4 levers and the corresponding shoulders of the first 1 and second 2 levers form a rhombus.
Шарнирное крепление датчика 5 к первому рычагу 1 и шарнирное крепление второго рычага 2 к корпусу расположены в одной плоскости 14, проходящей перпендикулярно оси корпуса 7 дефектоскопа.The hinged mounting of the sensor 5 to the first lever 1 and the hinged mounting of the second lever 2 to the body are located in one plane 14 extending perpendicular to the axis of the flaw detector body 7.
На корпусе 7 дефектоскопа установлен ряд механизмов крепления датчиков 5, расположенных в плоскостях, проходящих через ось симметрии корпуса 7 дефектоскопа.On the casing 7 of the flaw detector, a number of mounting mechanisms for sensors 5 are installed, located in planes passing through the axis of symmetry of the casing 7 of the flaw detector.
Для усиления жесткости шарниры механизма могут быть усилены, например с помощью гибких плоских накладок или другими средствами усиления.To increase stiffness, the hinges of the mechanism can be strengthened, for example, using flexible flat plates or other means of reinforcement.
Механизм крепления работает следующим образом.The fastening mechanism operates as follows.
При движении дефектоскопа в трубе датчик посредством рычажного механизма прижимается к внутренней стенке трубы 13, благодаря пружине 6, работающей на растяжение. При изменении диаметра трубы 13 датчик 5 перемещается, сохраняя свое положение относительно корпуса 7 дефектоскопа в продольном сечении, то есть его точка крепления перемещается в плоскости 14. Механизм крепления датчиков позволяет отслеживать неровности трубы, изменения его диаметра, при этом сохраняет положение датчика 5 также и в плоскости, проходящей через ось симметрии корпуса 7 дефектоскопа. Так же работают все механизмы крепления датчиков 5, установленные по образующей корпуса 7 (Фиг. 2). When the flaw detector moves in the pipe, the sensor, by means of a lever mechanism, is pressed against the inner wall of the pipe 13, due to the tensile spring 6. When changing the diameter of the pipe 13, the sensor 5 moves, maintaining its position relative to the flaw detector body 7 in a longitudinal section, that is, its attachment point moves in the plane 14. The mounting mechanism of the sensors allows you to track pipe bumps, changes in its diameter, while maintaining the position of the sensor 5 also in a plane passing through the axis of symmetry of the flaw detector body 7. All the mechanisms for mounting sensors 5 installed along the generatrix of the housing 7 also work (Fig. 2).

Claims

Формула изобретения Claim
1. Механизм крепления датчика к корпусу внутритрубного дефектоскопа, характеризующийся тем, что содержит первый двуплечий рычаг, на конце первого плеча которого закреплен датчик, второй рычаг, один конец которого шарнирно прикреплен к шарнирной опоре упомянутого первого рычага, а второй конец шарнирно закреплен на корпусе, третий рычаг, один конец которого шарнирно прикреплен к концу второго плеча упомянутого первого рычага, а второй конец шарнирно закреплен на корпусе, четвертый рычаг одним концом шарнирно закреплен на корпусе дефектоскопа в месте крепления упомянутого третьего рычага, а другим концом шарнирно прикреплен к упомянутому второму рычагу в месте расположения опоры, делящей третий рычаг на два плеча, при этом третий и четвертый рычаги и соответствующие плечи первого и второго рычага образуют ромб, в диагонали которого к рычагам прикреплена пружина, работающая на растяжение и обеспечивающая прижатие датчика к внутренней стенке исследуемой трубы.1. The mechanism of attachment of the sensor to the body of the in-line flaw detector, characterized in that it contains a first two-arm lever, at the end of the first shoulder of which a sensor is fixed, a second lever, one end of which is pivotally attached to the hinge support of the said first lever, and the second end is pivotally mounted on the body, the third lever, one end of which is pivotally attached to the end of the second shoulder of the said first lever, and the second end is pivotally attached to the housing, the fourth lever is pivotally attached to the housing by one end of the defect the cop at the attachment point of the third lever, and the other end pivotally attached to the second lever at the location of the support, dividing the third lever into two shoulders, while the third and fourth levers and the corresponding shoulders of the first and second lever form a rhombus in the diagonal of which to the levers a tensile spring is attached and ensures that the sensor is pressed against the inner wall of the pipe under study.
2. Механизм по п. 1 характеризующееся тем, что упомянутые шарнирные соединения выполнены с возможностью перемещения упомянутых рычагов в одной и той же плоскости.2. The mechanism according to claim 1, characterized in that said articulated joints are arranged to move said levers in the same plane.
3. Механизм по п. 1 характеризующееся тем, что места крепления к корпусу второго рычага и третьего с четвертым расположены на корпусе в одной плоскости, проходящей через ось симметрии корпуса дефектоскопа. 3. The mechanism according to claim 1, characterized in that the attachment points to the body of the second lever and the third and fourth are located on the body in the same plane passing through the axis of symmetry of the flaw detector body.
4. Механизм по п. 1 характеризующееся тем, что место крепления третьего и четвертого рычага расположено по ходу движения дефектоскопа впереди места крепления к корпусу второго рычага.4. The mechanism according to claim 1, characterized in that the mounting location of the third and fourth lever is located in the direction of the flaw detector in front of the mounting location to the housing of the second lever.
5. Механизм по п. 1 характеризующееся тем, упомянутая пружина установлена в той диагонали ромба, образованного рычагами, которая расположена параллельно корпусу. 5. The mechanism according to claim 1, characterized in that the said spring is installed in the diagonal of the rhombus formed by levers, which is parallel to the body.
6. Механизм по п. 1 характеризующееся тем, что концы упомянутой пружины закреплены на соответствующих концах третьего и четвертого рычагов.6. The mechanism according to claim 1, characterized in that the ends of said spring are fixed at the respective ends of the third and fourth levers.
7. Механизм по п. 1 характеризующееся тем, что шарнирное крепление датчика к первому рычагу и шарнирное крепление второго рычага к корпусу расположены в одной плоскости, проходящей перпендикулярно оси корпуса дефектоскопа.7. The mechanism according to claim 1, characterized in that the hinged mounting of the sensor to the first lever and the hinged mounting of the second lever to the housing are located in the same plane perpendicular to the axis of the flaw detector.
8. Механизм по п. 1 характеризующееся тем, что датчик закреплен на первом рычаге с возможностью поворота. 8. The mechanism according to claim 1, characterized in that the sensor is mounted on the first lever with the possibility of rotation.
9. Механизм по п. 1 характеризующееся тем, что на корпусе дефектоскопа установлен ряд механизмов крепления датчиков, расположенных в плоскостях, проходящих через ось симметрии корпуса дефектоскопа. 9. The mechanism according to claim 1, characterized in that a number of mounting mechanisms for sensors are installed on the flaw detector body located in planes passing through the axis of symmetry of the flaw detector housing.
PCT/RU2006/000686 2005-12-21 2006-12-19 Mechanism for fixing a sensor to an in-line flaw detector body WO2007075126A1 (en)

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RU2005141812 2005-12-21
RU2005141812/28A RU2298784C1 (en) 2005-12-21 2005-12-21 Mechanism for fastening detector to case of intra-tube flaw detector

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RU2445593C1 (en) * 2010-11-01 2012-03-20 Открытое акционерное общество "Газпром" Mechanism for attaching sensor to housing of pig flaw detector

Citations (4)

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US4447777A (en) * 1980-10-17 1984-05-08 British Gas Corporation Magnetic pipeline inspection vehicle with metallic foil and bristle contacts supporting the vehicle
US5864232A (en) * 1996-08-22 1999-01-26 Pipetronix, Ltd. Magnetic flux pipe inspection apparatus for analyzing anomalies in a pipeline wall
RU2204113C1 (en) * 2002-03-28 2003-05-10 ЗАО "Нефтегазкомплектсервис" Carrier of sensors for intrapipe inspection dredger (modifications)
RU2225977C1 (en) * 2003-05-27 2004-03-20 ЗАО "Нефтегазкомплектсервис" Intratube flaw detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447777A (en) * 1980-10-17 1984-05-08 British Gas Corporation Magnetic pipeline inspection vehicle with metallic foil and bristle contacts supporting the vehicle
US5864232A (en) * 1996-08-22 1999-01-26 Pipetronix, Ltd. Magnetic flux pipe inspection apparatus for analyzing anomalies in a pipeline wall
RU2204113C1 (en) * 2002-03-28 2003-05-10 ЗАО "Нефтегазкомплектсервис" Carrier of sensors for intrapipe inspection dredger (modifications)
RU2225977C1 (en) * 2003-05-27 2004-03-20 ЗАО "Нефтегазкомплектсервис" Intratube flaw detector

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