CN212932489U

CN212932489U - Circumferential magnetic flux leakage detection equipment

Info

Publication number: CN212932489U
Application number: CN202020801637.1U
Authority: CN
Inventors: 杨玉
Original assignee: Dazhou Detec Testing Equipment Co ltd
Current assignee: Dazhou Detec Testing Equipment Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-04-09
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a circumference magnetic flux leakage check out test set, include the elastic support and install the test probe on the elastic support, the elastic support includes parallel arrangement's first stay, second support bar and connection the undersetting strip of first stay, second support bar, the corner that first stay and undersetting strip are connected is opened there is a first arc wall, test probe further includes first PCB board, sets up in second PCB board, two at least hall element and two at least eddy current testing chips of first PCB board one side, hall element connects in a side surface of first PCB board. The utility model discloses can be so that the upper surface of probe and the pipeline inner wall that awaits measuring remain the interference throughout and can not damage the probe to guarantee the detection precision of probe inner sensor, can also make the probe still keep after long-time the use with the inseparable laminating of pipeline inner wall, guarantee to detect precision and stability.

Description

Circumferential magnetic flux leakage detection equipment

Technical Field

The utility model relates to a circumference magnetic leakage check out test set belongs to pipeline inspection technical field.

Background

The oil and gas pipeline fails due to corrosion, mechanical damage, geological damage, pipe self defects and the like after long-time running, and in severe cases, the oil and gas pipeline causes fire, explosion and poisoning, and influences the surrounding environment and the life safety of people. Most of oil and gas pipelines are buried underground and have long conveying distance, and online detection is carried out on the pipelines by using a magnetic flux leakage corrosion detector, so that the method has important significance for guaranteeing continuous conveying of the pipelines and preventing pipeline damage events.

The pipeline magnetic leakage corrosion detector generally comprises a driving section, a magnet, a support, a mileage measurement part, a probe mechanism, a battery, an electronic recording part and the like, wherein the probe mechanism is an important component of the detector, and the pipeline magnetic leakage corrosion detector performs online detection on a pipeline by using the probe mechanism and picks up a magnetic leakage field of the pipeline corrosion defect so as to determine the corrosion defect of the pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circumference magnetic leakage check out test set, this circumference magnetic leakage check out test set's upper surface and the pipeline inner wall that awaits measuring remain the interference throughout and can not damage the probe to guarantee the detection precision of sensor in the probe, can also make the probe still keep after long-time the use with the inseparable laminating of pipeline inner wall, guarantee to detect precision and stability.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a circumferential magnetic flux leakage detection device comprises a barrel, a plurality of probes arranged on the outer surface of the barrel through elastic supports, and a plurality of magnetic steels arranged on the outer surface of the barrel, wherein the magnetic steels are tightly arranged along the axial direction of the barrel to form at least four magnetic stripes, the four magnetic stripes are arranged at equal intervals along the circumferential direction of the barrel, and detection strips formed by the arrangement of the plurality of probes along the circumferential direction are arranged between every two adjacent magnetic stripes;

the elastic support comprises a first supporting strip and a second supporting strip which are arranged in parallel and a bottom supporting strip connected with the first supporting strip and the second supporting strip, the lower ends of the first supporting strip and the second supporting strip are connected with the bottom supporting strip, the first supporting strip and the second supporting strip are arranged obliquely with the bottom supporting strip, and two ends of the probe are connected with the upper ends of the first supporting strip and the second supporting strip respectively;

a first arc-shaped groove is formed in the corner where the first supporting strip is connected with the bottom supporting strip, and is formed in the inner surfaces, opposite to the probe, of the first supporting strip, the bottom supporting strip, the second supporting strip and the probe;

the probe further comprises a first PCB, a second PCB arranged on one side of the first PCB, at least two Hall elements and at least two eddy current detection chips, wherein the Hall elements are connected to the surface of one side of the first PCB, the eddy current detection chips are connected to the surface of the other side, opposite to the second PCB, of the first PCB and are electrically connected with the first PCB, and epoxy resin layers are coated on the outer sides of the first PCB, the second PCB, the Hall elements and the eddy current detection chips;

at least two induction coils corresponding to the eddy current detection chip are arranged in the second PCB, and two ends of each induction coil extend out of one end face of the second PCB and are connected with the end face of the first PCB in a welding mode.

The further improved scheme in the technical scheme is as follows:

1. in the scheme, the included angles among the first supporting strips, the second supporting strips and the bottom supporting strips are 30-60 degrees.

2. In the above scheme, the inner surface of the first supporting bar is further provided with a second arc-shaped groove.

3. In the above scheme, the second arc-shaped groove is close to the joint of the first supporting bar and the probe.

4. In the scheme, the other end face, far away from the extension end of the induction coil, of the second PCB is connected with the first PCB in a welding mode.

5. In the above scheme, the hall element is a 3D hall sensor.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses circumference magnetic leakage check out test set, it can accurately detect the defect in pipeline circumference, effectively discern defect position, defect nature etc. of pipeline, provide accurate data guide for the maintenance of pipeline; in addition, the lower ends of the first supporting strips and the second supporting strips are connected with the bottom supporting strips, the first supporting strips and the second supporting strips are obliquely arranged with the bottom supporting strips, two ends of the probe are respectively connected with the upper ends of the first supporting strips and the second supporting strips, the two obliquely arranged supporting strips, the bottom supporting strips and the probe enclose a parallelogram, the upper surface of the probe can be always kept in interference with the inner wall of the pipeline without damaging the probe, and therefore the detection precision of the probe is ensured; furthermore, a first arc-shaped groove is formed in a corner where the first supporting strip and the bottom supporting strip are connected, the first arc-shaped groove is formed in the first supporting strip, the bottom supporting strip and the second supporting strip, and the probe is arranged on the inner surface opposite to the probe, so that the situation that the elastic support is too large in stress generated when being rapidly extruded, too concentrated and local fracture of the support or exceeding yield strength to enable the support to be incapable of rebounding and the like can be effectively avoided, the probe can be still tightly attached to the inner wall of the pipeline after being used for a long time, and the detection precision and stability are guaranteed.

2. The utility model discloses circumference magnetic flux leakage check out test set, its probe further include first PCB board, set up in second PCB board, two at least hall element and two at least eddy current test chips of first PCB board one side, hall element connects in a side surface of first PCB board, the eddy current test chip is connected in the opposite side surface of first PCB board back to the second PCB board to switch on with first PCB board electricity, make the probe both can detect the size of pipeline defect, can discern the defect and be in pipeline inner wall or outer wall again, thereby reduce half the use quantity of probe when improving the detection precision, greatly reduce the size of equipment, make the operation of equipment in the pipeline more nimble, cross the bend ability stronger, stability is high, the operation risk is little; in addition, at least two induction coils corresponding to the eddy current detection chip are arranged in the second PCB, and two ends of each induction coil extend out of one end face of the second PCB and are welded with the end face of the first PCB, so that the fixed connection of the two PCBs and the communication connection between the induction coils and the eddy current detection chip are realized, and the interference of conductive metal laid on the connected surface of the two PCBs on the coils can be avoided, thereby avoiding signal attenuation and loss, improving the detection precision and sensitivity of the eddy current detection chip, and reducing the thickness of the whole probe; in addition, the other end face of the second PCB, which is far away from the extending end of the induction coil, is connected with the first PCB in a welding mode, the other end of the PCB is fixedly welded, the two ends of the PCB are fixed, the stability and the structural strength of connection between the PCBs are improved, and therefore the stability of the test precision of the probe is guaranteed.

Drawings

FIG. 1 is a schematic structural view of the circumferential magnetic flux leakage detection device of the present invention;

FIG. 2 is a schematic view of a local structure of the circumferential magnetic flux leakage detecting apparatus of the present invention;

FIG. 3 is a schematic view of a local structure of a probe in the circumferential magnetic flux leakage detecting apparatus of the present invention;

FIG. 4 is a side view of a local structure of a probe in the circumferential magnetic flux leakage detecting apparatus of the present invention;

fig. 5 is the utility model discloses local structure cross-sectional view of probe among circumference magnetic leakage check out test set.

In the above drawings: 1. a first PCB board; 2. a Hall element; 3. an eddy current inspection chip; 4. a second PCB board; 5. an induction coil; 6. a barrel; 7. a probe; 8. magnetic steel; 9. a magnetic strip; 10. a detection bar; 11. an elastic support; 13. a first support bar; 14. a second supporting strip; 15. a bottom support bar; 17. a first arc-shaped slot; 18. a second arc-shaped slot; 19. a first connecting column; 20. a second connecting column.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a circumferential magnetic flux leakage detection device comprises a barrel 6, a plurality of probes 7 arranged on the outer surface of the barrel 6 through elastic supports 11, and a plurality of magnetic steels 8 arranged on the outer surface of the barrel 6, wherein the magnetic steels 8 are closely arranged along the axial direction of the barrel 6 to form at least four magnetic stripes 9, the four magnetic stripes 9 are arranged at equal intervals along the circumferential direction of the barrel 6, and detection strips 10 formed by arranging the plurality of probes 7 along the circumferential direction are arranged between every two adjacent magnetic stripes 9;

the elastic support 11 comprises a first support bar 13 and a second support bar 14 which are arranged in parallel and a bottom support bar 15 connected with the first support bar 13 and the second support bar 14, the lower ends of the first support bar 13 and the second support bar 14 are respectively connected with the bottom support bar 15, the first support bar 13 and the second support bar 14 are respectively arranged obliquely with the bottom support bar 15, and the two ends of the probe 7 are respectively connected with the upper ends of the first support bar 13 and the second support bar 14;

a first arc-shaped groove 17 is formed at the corner where the first supporting strip 13 is connected with the bottom supporting strip 15, and the first arc-shaped groove 17 is formed on the inner surfaces of the first supporting strip 13, the bottom supporting strip 15, the second supporting strip 14 and the probe 7 which are opposite to each other;

the probe 7 further comprises a first PCB (printed circuit board) 1, a second PCB 4 arranged on one side of the first PCB 1, at least two Hall elements 2 and at least two eddy current detection chips 3, wherein the Hall elements 2 are connected to one side surface of the first PCB 1, the eddy current detection chips 3 are connected to the other side surface of the first PCB 1, which is opposite to the second PCB 4, and are electrically communicated with the first PCB 1, and epoxy resin layers are coated on the outer sides of the first PCB 1, the second PCB 4, the Hall elements 2 and the eddy current detection chips 3;

at least two induction coils 5 corresponding to the eddy current detection chip 3 are arranged in the second PCB 4, and two ends of each induction coil 5 extend out of one end face of the second PCB 4 and are connected with the end face of the first PCB 1 in a welded mode.

The included angles between the first supporting strips 13, the second supporting strips 14 and the bottom supporting strips 15 are 55 degrees; a second arc-shaped groove 18 is formed on the inner surface of the first supporting bar 13; the second arc-shaped slot 18 is close to the joint of the first supporting bar 13 and the probe 7.

Example 2: a circumferential magnetic flux leakage detection device comprises a barrel 6, a plurality of probes 7 arranged on the outer surface of the barrel 6 through elastic supports 11, and a plurality of magnetic steels 8 arranged on the outer surface of the barrel 6, wherein the magnetic steels 8 are closely arranged along the axial direction of the barrel 6 to form at least four magnetic stripes 9, the four magnetic stripes 9 are arranged at equal intervals along the circumferential direction of the barrel 6, and detection strips 10 formed by arranging the plurality of probes 7 along the circumferential direction are arranged between every two adjacent magnetic stripes 9;

at least two induction coils 5 corresponding to the eddy current detection chip 3 are arranged in the second PCB 4, and two ends of each induction coil 5 extend out of one end face of the second PCB 4 and are connected with the end face of the first PCB 1 in a welding mode to form a first connecting column 19.

The included angles between the first supporting strips 13, the second supporting strips 14 and the bottom supporting strips 15 are 45 degrees; the other end face of the second PCB 4 far away from the extending end of the induction coil 5 is connected with the first PCB 1 through welding to form a second connecting column 20; the Hall element 2 is a 3D Hall sensor; steel brushes are uniformly and densely distributed on the surface of each magnetic steel 8 back to the cylinder 6;

for a single induction coil 5, all coil layers are connected through via holes in the coil, four layers of coils are arranged, the upper two layers are in one group, the lower two layers are in one group, and each group is connected through a via hole;

for four induction coils 5, each induction coil 5 corresponds to one eddy current detection chip 3;

every induction coil 5 is whole to be connected with the semicircular hole through one end of first PCB board with the welded mode, plays signal transmission and fixed effect simultaneously, and the other end provides the fixed action through the semicircular hole with the welded mode, has avoided first PCB board to spread copper and has caused the influence to eddy current testing, all connects in order to walk the mode of line between the device, provides the condition for drawing close the distance of two PCB boards, the reduction probe thickness that can be better.

By adopting the circumferential magnetic flux leakage detection equipment, the circumferential defects of the pipeline can be accurately detected, the defect positions, the defect properties and the like of the pipeline can be effectively identified, and accurate data guidance is provided for the maintenance of the pipeline;

in addition, the two obliquely arranged supporting bars, the bottom supporting bar and the probe form a parallelogram, so that the upper surface of the probe can always keep interference with the inner wall of the pipeline without damaging the probe, and the detection precision of the probe is ensured;

furthermore, the situations that the local fracture of the support is caused by overlarge stress and over concentration generated when the elastic support is rapidly extruded or the support cannot rebound due to the fact that the yield strength is exceeded can be effectively avoided, so that the probe can still be tightly attached to the inner wall of the pipeline after being used for a long time, and the detection precision and stability are guaranteed;

in addition, the probe can detect the size of the pipeline defect and can identify whether the defect is on the inner wall or the outer wall of the pipeline, so that the detection precision is improved, the using quantity of the probe is reduced by half, the size of equipment is greatly reduced, and the equipment is more flexible to operate in the pipeline, higher in bend passing capability, high in stability and small in operation risk;

in addition, by welding the end surfaces of the two PCBs, the fixed connection of the two PCBs and the communication connection between the induction coil and the eddy current detection chip are realized, and the interference of conductive metal laid on the connected surfaces of the two PCBs on the coil can be avoided, so that the signal attenuation and loss are avoided, the detection precision and sensitivity of the eddy current detection chip are improved, and the integral thickness of the probe can be reduced; and the other end of the PCB is welded and fixed, so that the two ends of the PCB are fixed, the stability and the structural strength of connection between the PCBs are improved, and the stability of the test precision of the probe is ensured.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a circumference magnetic leakage check out test set which characterized in that: the magnetic steel type ultrasonic probe comprises a barrel body (6), a plurality of probes (7) arranged on the outer surface of the barrel body (6) through elastic supports (11), and a plurality of magnetic steels (8) arranged on the outer surface of the barrel body (6), wherein the magnetic steels (8) are tightly arranged along the axial direction of the barrel body (6) to form at least four magnetic stripes (9), the four magnetic stripes (9) are arranged at equal intervals along the circumferential direction of the barrel body (6), and detection strips (10) formed by arranging the probes (7) along the circumferential direction are arranged between every two adjacent magnetic stripes (9);

the elastic support (11) comprises a first support bar (13) and a second support bar (14) which are arranged in parallel and a bottom support bar (15) connected with the first support bar (13) and the second support bar (14), the lower ends of the first support bar (13) and the second support bar (14) are connected with the bottom support bar (15), the first support bar (13) and the second support bar (14) are respectively arranged with the bottom support bar (15) in an inclined manner, and the two ends of the probe (7) are respectively connected with the upper ends of the first support bar (13) and the second support bar (14);

a first arc-shaped groove (17) is formed in the corner where the first supporting bar (13) is connected with the bottom supporting bar (15), and the first arc-shaped groove (17) is formed in the inner surfaces, opposite to the first supporting bar (13), the bottom supporting bar (15), the second supporting bar (14) and the probe (7);

the probe (7) further comprises a first PCB (1), a second PCB (4) arranged on one side of the first PCB (1), at least two Hall elements (2) and at least two eddy current detection chips (3), wherein the Hall elements (2) are connected to one side surface of the first PCB (1), the eddy current detection chips (3) are connected to the other side surface, opposite to the second PCB (4), of the first PCB (1) and are electrically communicated with the first PCB (1), and epoxy resin layers are coated on the outer sides of the first PCB (1), the second PCB (4), the Hall elements (2) and the eddy current detection chips (3);

at least two induction coils (5) corresponding to the eddy current detection chip (3) are arranged in the second PCB (4), and two ends of each induction coil (5) extend out of one end face of the second PCB (4) and are connected with the end face of the first PCB (1) in a welding mode.

2. The circumferential flux leakage detection apparatus according to claim 1, characterized in that: the included angles among the first supporting strips (13), the second supporting strips (14) and the bottom supporting strips (15) are 30-60 degrees.

3. The circumferential flux leakage detection apparatus according to claim 1, characterized in that: the inner surface of the first supporting strip (13) is also provided with a second arc-shaped groove (18).

4. The circumferential flux leakage detection apparatus according to claim 3, characterized in that: the second arc-shaped groove (18) is close to the joint of the first supporting bar (13) and the probe (7).

5. The circumferential flux leakage detection apparatus according to claim 1, characterized in that: the other end face, far away from the extending end of the induction coil (5), of the second PCB (4) is connected with the first PCB (1) through welding.

6. The circumferential flux leakage detection apparatus according to claim 1, characterized in that: the Hall element (2) is a 3D Hall sensor.

7. The circumferential flux leakage detection apparatus according to claim 1, characterized in that: and steel brushes are uniformly and densely distributed on the surface of each magnetic steel (8) back to the cylinder body (6).