RU123961U1 - TRANSPORT SENSOR RING SUSPENSION UNIT TUBES - Google Patents

Abstract

1. The node of the suspension ring of the sensors of the transport module of the in-tube flaw detector, including the movable in the plane perpendicular to the axis of symmetry of the transport module, the ring of sensors, on which the pivotally mounted levers with measuring sensors and springs (for example, plate-like, ensuring the pressure of the measuring sensors against the wall pipeline), characterized in that it is a system of three movable flanges, a closed guide oval shape, a polyurethane ring and a movable flange with samples rigidly mounted on the body of the flaw detector transport module, the first of three movable flanges being connected to the second of the movable flanges through the first struts through the samples of the stationary flange, the second and third movable flanges are interconnected by second racks and clamp located between them a polyurethane ring, due to which the suspension of the sensors is centered relative to the cross section of the pipeline, with three movable flanges fixed to each other, polyurethane The ring of the sensors and the sensor ring, mounted on the third of the three movable flanges, have a diameter of the central holes exceeding the outer diameter of the flaw detector transport module at the place of their installation, and the sensor ring is aligned with the first two of four mutually perpendicular rectangular holes located on its body with metal axes rigidly fixed to the body of the flaw detector transport module perpendicular to its axis of symmetry and passing through the first protrusions of the closed guide oval

Description

The claimed utility model relates to devices for in-pipe non-destructive testing by passing, inside a controlled pipeline, a flaw detector consisting of one or more transport modules moving due to the force of the product flow transported through the pipeline, with sensors installed on its body that are sensitive to parameters reflecting technical condition of the main pipeline.

In-tube flaw detector sensors are installed concentrically around the perimeter of the flaw detector body in order to uniformly overlap its entire inner surface in the process of monitoring the condition of the pipe. In real conditions, the pipe is an imperfect cylindrical body. In the process of movement, the in-line flaw detector undergoes turns of the pipeline, narrowing of the pipeline, sections of pipes of various diameters and various wall thicknesses.

The design of the suspension ring assembly of the sensors of the transport module of the in-tube flaw detector during its movement through the pipeline should provide constant contact of all measuring sensors with the inner wall of the pipeline and the movement of the sensor system in a plane perpendicular to the axis of the flaw detector, while ensuring a constant angular position relative to the inner wall of the pipeline.

There are various systems for mounting sensors to the body of in-line flaw detectors.

The sensor system according to US patent 4330748, publication 05/18/1982, IPC G01R 033/00, G01N 027/72, G01N 027/82, as well as US patent 4468619, publication 08/28/1984 IPC G01N 027/82 contains sensors mounted on the base - a slide located around the perimeter of the flaw detector housing. The base is. a flexible plate bent in the form of a parallelogram, mounted on the flaw detector housing. One branch of the plate is a support for each of the sensors, the other holds the bending support from the wall of the pipe in the place of fastening of each of the sensors.

This sensor mounting system is stationary relative to the flaw detector housing and, due to its stiffness in the transverse direction, provides a constant orientation of the sensors in the radial direction, however, it does not provide enough constant adhesion of the sensors to the pipe surface, especially in pipeline turns, since due to the rigidity of the system it can only track small changes in the diameter of the pipe and does not track the displacement of the flaw detector housing relative to the axis of the pipeline.

Known mounting systems for sensors of in-line flaw detectors (US patent 4098126 dated 07/04/1978, IPC G01B 5/28, NPK US 73/432R, as well as US patent 4,807,484 on 02/28/1989, IPC G01B 5/28, NPK US 73 /865.8; ed. Certificate SU 1157443 dated 05.23.1985, IPC G01N 27/82; US patent 4598250 dated 07/01/1986, UPC 324/220; US patent 5115196 dated 05/19/1992, US patent 4945306 dated 07/31/1990, NPK USA 324/220), passed through the controlled pipeline, containing a housing with sensors installed on it, sensitive to diagnostic parameters that reflect the technical condition of the main pipeline.

Known mounting systems for sensors of in-line flaw detectors (RF patent RU 2133032 from 10.07.1999, IPC G01N 27/83; as well as patent GB 2257788 from 01.20.93, IPC G01N 27/82, patent GB 2260613 from 04.21.93, IPC G01N 27/87 patent US 5402065 from 03/28/95, UPC 324/220; patents of the Russian Federation RU 2139468, RU 2139469 from 10.10.99; international application WO 00/08378 from 02.17.00, IPC F17D 5/00; patent US 4576097 from 03/18/86, NPK US 104 / 138G; patent GB 2097537 dated 03.11.82, IPC G01N 27/83), passed inside the pipeline under examination, containing a housing with sensors installed on it that are sensitive to diagnostic parameters that reflect the state of the pipeline wall .

A known sensor system according to US patent 5864232, publication 01/26/1999, IPC G01N 27/72. The system contains sensors mounted on holders, each of which is mounted on the flaw detector body using 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 is made according to the “parallelogram” scheme, 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 constant contact of the sensors during cornering and in places where the diameter of the pipeline changes, since the base of the sensors can only move parallel to the body and cannot track the bends of the pipeline, and the displacement of the flaw detector relative to the axis of the pipeline.

Known patent of Russia No. 2225977, publication March 20, 2004, IPC G01M 3/08, F17D 5/00, G01N 27/72. 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 symmetry axis 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.

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, because 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, since two levers are mounted both at the base and at the body at almost the same point. When curvatures or protrusions pass through the pipe wall, the base may shift relative to the axis of the pipe, and the sensors may lose contact with the pipe wall.

Known US patent No. 4105972, publication date 04/05/1977, IPC G01N 27/90; G01M 3/00; G01R 33/12) to the piping diagnostic device. The specified device includes an electronic unit and a housing with a magnetic circuit, along the edges of which are placed blocks of magnets on which the brushes are located. In the middle part of the magnetic circuit with the help of a mounting unit, a ring of sensors is mounted axisymmetrically, which are mounted on the contact pads. Sensors with spring levers are pressed against the inner surface of the pipe. The design of the mount unit of the movable ring of sensors is made with the ability to provide movement of the ring of sensors in the radial direction relative to the body of the flaw detector during passage of the constrictions and turns of the pipeline.

The centering of the sensor ring in the pipeline is effected by springs, i.e. the mass of the sensor ring is compensated by the difference between the forces of the springs in the upper and lower parts of the sensor ring, which leads to a displacement of the sensor ring in the radial direction relative to the axis of the pipeline. The shift of the sensor ring in the radial direction leads to a different angle of inclination of the levers, which, in turn, leads to a mutual linear displacement of the sensors in the axial direction of the pipeline and the deterioration of the accuracy of measurements of pipeline defects. In addition, the sensor ring does not have a rigid fixation relative to the flaw detector housing in the angular direction, which does not allow to accurately determine the angular position of the detected defects of the pipeline surface.

The closest technical solution (prototype) of the claimed utility model is the sensor mount according to the patent of the Russian Federation RU No. 113006 of 01/27/2012. The specified node mounting sensors holders includes two flanges, sequentially located and fixedly mounted on the body of the flaw detector. In the annular gap between them are a movable flange and a ring. The movable flange and the ring have central openings, the inner diameter of which exceeds the cross-sectional diameter of the cylindrical flaw detector housing at the installation site of the sensor ring. The movable ring has on its planes the cross-shaped (90 ° relative to each other) first and second groups of keys. A third flange is fastened to the movable flange by means of fastening posts, on which a polyurethane ring is mounted with the help of the fourth flange, which centers the housing of the sensor ring relative to the cross section of the inner diameter of the pipeline. The sensor ring housing is also mounted on the fourth flange.

The attachment point of the sensors is made by a sequential set of flanges and rings fixed in the plane perpendicular to the symmetry axis of the flaw detector and fixed from the possibility of rotation relative to the inner wall of the examined pipeline, including the sensor ring providing maximum contact of the sensors with the pipeline wall when the flaws and pipe bends pass through the flaw detector. The specified method of sequential placement of parts and assemblies has the disadvantage associated with an increase in the longitudinal size of the sensor mount, and, accordingly, the flaw detector body by the length necessary for its mounting. The increase in the longitudinal size of the housing of the transport module of the flaw detector, reduces the possibility of the flaw detector passing through curved bends (small radius bends (less than 5 D _N )).

The inventive utility model solves the problem of reducing the longitudinal size of the sensor attachment node, while ensuring constant contact of all measuring sensors with the pipeline wall, in straight sections, in turns and in places of variable cross-section of the pipe diameter, while maintaining the angular position of the sensor ring relative to the body of the flaw detector.

The main technical result obtained by the implementation of the claimed utility model is to reduce the longitudinal size of the flaw detector transport modules to ensure the possibility of passage of pipelines, with the presence of bends of small radii; while maintaining the high quality of defectoscopy data and the accuracy of determining the angular position of defects.

The indicated technical result was obtained due to the fact that the suspension unit of the sensor ring of the claimed design is small in the longitudinal direction, made movable in the plane perpendicular to the axis of symmetry of the flaw detector transport module, does not allow a change in the angular position of the sensor ring, relative to the inner wall of the pipeline, centered in pipe cross section due to the presence of a polyurethane ring.

Figure 1 shows the node of the suspension ring of the sensors of the transport module of the flaw detector in-tube assembly (three-dimensional image).

Figure 2 shows the node of the suspension ring of the sensors of the transport module of the flaw detector in-tube assembly (in section).

Figure 3 - shows the node of the suspension ring of the sensors of the transport module of the flaw detector in-tube assembly (in section, with a shift of 90 degrees relative to the plane of the section shown in figure 2).

Figure 4 shows the node of the suspension ring of the sensors of the transport module of the in-tube flaw detector in the disassembled state.

Figure 5 shows a closed guide oval.

Figure 6 shows the transport module magnetic flaw detector in-pipe as an example of the use of the claimed node of the suspension ring of the sensors.

In figures 1-6, the following notation:

1 - a ring of sensors;

2 - lever;

3 - leaf spring;

4 - measuring sensor;

5 - the first movable flange;

6 - fixed flange;

7 - second movable flange;

8 - polyurethane ring;

9 - the third movable flange;

10 - closed guide oval;

11 - the first rack;

12 - the first protrusion (closed guide oval);

13 - hole (first protrusion of a closed guide oval);

14 - the second protrusion (closed guide oval);

15 - guide groove (second protrusion of a closed guide oval);

16 - metal axis;

17 - the second rack;

18 - the first rectangular hole (sensor rings);

19 - the second rectangular hole (sensor rings);

20 - slider (third movable flange);

21 - sleeve;

22 - sample (fixed flange);

23 - a small axis of symmetry of a closed guide oval;

24 - the major axis of symmetry of the closed guide is oval;

25 - housing of the transport module of the flaw detector;

26 - the node of the suspension ring of the sensors of the transport module of the in-pipe flaw detector;

27 - the direction of movement of the flaw detector.

The proposed design is a system of three movable flanges 5, 7 and 9, a closed oval-shaped guide 10, a polyurethane ring 8 and a fixed flange 6 with samples 22. Flange 6, when assembling the suspension of the sensor ring, is fixedly mounted on the housing 25 of one of the transport modules as part of a flaw detector . The first movable flange 5 and the second movable flange 7, through samples 22 of the fixed flange 6, are interconnected using the first racks 11. The first and second movable flanges 5 and 7 form a gap, the size of which depends on the size of the first racks 11. The gap between the first and the second movable flanges 5 and 7 provides the entire suspension of sensors 26 a degree of freedom in the plane perpendicular to the axis of symmetry of the flaw detector transport module, and also limits the freedom of suspension of the sensors 26 in the longitudinal direction. The third movable flange 9 is connected to the second movable flange 7 by means of the second struts 7. A polyurethane ring 8 is clamped between the movable flanges 7 and 9. The outer diameter of the polyurethane ring 8 is made equal in size to the inner diameter of the pipeline, which makes it possible to center the suspension of the sensors 26 relative to the cross section the pipeline. The sensor ring 1 is attached to the third movable flange. The movable flanges 5, 7 and 9, the polyurethane ring 8 and the sensor ring 1, fixed to each other, have a diameter of central holes greater than the outer diameter of the cylindrical housing of the flaw detector transport module at the installation site of the sensor ring suspension assembly 26.

On the ring of sensors 1, pivotally mounted levers with measuring sensors and springs (for example, plate-like, providing pressure sensors to the wall of the pipe) are placed axisymmetrically. In the ring of sensors 1 there are two first rectangular holes 18 located at an angle of 180 degrees relative to each other and two second rectangular holes 19 located at an angle of 180 degrees relative to each other. The angle between two pairs of holes 19 and 18 is 90 degrees. The sensor ring 1, by means of the first rectangular holes 18, is aligned with the metal axes 16. The sensor ring 1, by means of the second rectangular holes 19, is aligned with the slider 20 of the third movable flange 9. Inside the sensor ring 1, a closed oval-shaped guide is placed 10. Closed oval-shaped guide 10 has two pairs of protrusions 12 and 14. The first two protrusions 12 of the oval-shaped closed guide rail 10 are designed to interact with the metal axes 16 by means of coaxial holes. The metal axes 16 are fixedly mounted on the housing of the transport module perpendicular to the axis of symmetry of the transport module of the flaw detector 13. The second two protrusions 14, 90 degrees offset from the first two protrusions 12, have guide grooves 15 and are designed to interact with the sliders 20 of the third movable flange 9.

The design of the suspension unit of the ring of sensors of the transport module of the flaw detector is as follows. When the flaw detector moves in direction 27, the flanges 5, 7 and 9 fixed to each other and the sensor ring 1 move in the plane perpendicular to the axisymmetry of the flaw detector transport module, under the action of the force created by the polyurethane disk 8. Moving the sensor ring in a plane perpendicular to the symmetry axis of the flaw detector transport module a constant angular position, relative to the inner wall of the pipeline, is provided by the ability to move the sensor ring 1 along the major axis 24, a closed guide oval in shape, by combining the first rectangular holes 18 with the metal axes 16, and moving along the small axis 23, the closed guide is oval, by combining the second rectangular holes 19 with the slider 20 of the third movable flange 9 interacting with the guide groove 15 of the second protrusion 14 of the closed guide oval.

The technical result is achieved by reducing the number of interacting flanges, which allows to reduce the longitudinal size of the transport module, while maintaining constant contact of the measuring sensors with the pipe wall, due to the centering polyurethane ring and the invariance of the angular position of the sensor ring, due to the interaction of rectangular holes sensor rings with elements of a third movable flange and a closed oval-shaped ring.

An example of the implementation of the claimed node of the suspension ring of the sensors 26 on the housing of the transport module of the flaw detector tube 25 shown in Fig.6.

Claims (5)

1. The node of the suspension ring of the sensors of the transport module of the in-tube flaw detector, including the movable in the plane perpendicular to the axis of symmetry of the transport module, the ring of sensors, on which the pivotally mounted levers with measuring sensors and springs (for example, plate-like, ensuring the pressure of the measuring sensors against the wall pipeline), characterized in that it is a system of three movable flanges, a closed guide oval shape, a polyurethane ring and a movable flange with samples rigidly mounted on the body of the flaw detector transport module, the first of three movable flanges being connected to the second of the movable flanges through the first struts through the samples of the stationary flange, the second and third movable flanges are interconnected by second racks and clamp located between them a polyurethane ring, due to which the suspension of the sensors is centered relative to the cross section of the pipeline, with three movable flanges fixed to each other, polyurethane The ring and the sensor ring, mounted on the third of the three movable flanges, have a diameter of the central holes greater than the outer diameter of the flaw detector transport module at the place of their installation, and the sensor ring is aligned with the first two of four mutually perpendicular rectangular holes located on its body. with metal axes rigidly fixed to the body of the flaw detector transport module perpendicular to its axis of symmetry and passing through the first protrusions of the closed oval guide shaped, which ensures the movement of the sensor ring along the major axis of the oval-shaped closed guide and the constant angular position of the sensor ring relative to the inner wall of the pipeline, using the second two of the four mutually perpendicular rectangular holes of the sensor ring is combined with the slider of the third movable flange, which interacts with the guide groove the second protrusion of the closed guide is oval, which ensures the movement of the sensor ring along the minor axis of the closed guide th oval. 2. The node of the suspension ring of the sensors of the transport module of the flaw detector according to claim 1, characterized in that the first and second movable flanges form a gap, the value of which depends on the size of the first racks and provides the entire structure with a degree of freedom in a plane perpendicular to the axis of symmetry of the transport module of the flaw detector, and also limits the freedom of suspension of the sensors in the longitudinal direction. 3. The node of the suspension ring of the sensors of the transport module of the flaw detector according to claim 1, characterized in that the closed guide is oval in shape located inside the ring of sensors. 4. The node of the suspension ring of the sensors of the transport module of the flaw detector according to claim 1, characterized in that the oval-shaped closed guide has two pairs of protrusions, the first two protrusions of the closed guide designed to interact with metal axes through coaxial holes, and the second two protrusions offset relative to the first two protrusions at 90 °, have guide grooves and are designed to align with the sliders of the third movable flange. 5. The node of the suspension ring of the sensors of the transport module of the flaw detector according to claim 1, characterized in that the outer diameter of the polyurethane ring is made equal in size to the inner diameter of the pipeline.

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