CN212568605U

CN212568605U - Pipeline axial defect detector

Info

Publication number: CN212568605U
Application number: CN202020799992.XU
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: 2021-02-19
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a pipeline axial flaw detection appearance, including barrel, a plurality of probe, a plurality of magnet steel, the probe is installed on the barrel surface along barrel circumference interval through an elastic support, the elastic support includes parallel arrangement's first supporting strip, second support bar and connection the end support bar of first supporting strip, second support bar, it has a third arc wall to open on the surface that second support bar and first supporting strip carried on the back mutually, and this third arc wall is close to the junction of second support bar and probe, the probe further includes PCB base plate, two at least hall elements and two at least eddy current detection chips, hall element connects in a side surface of PCB base plate, the eddy current detection chip is connected in the opposite side surface of PCB base plate. The utility model discloses make the position of sensor chip in the probe remain throughout with the parallel of pipeline internal surface to further improve the precision that detects the pipeline.

Description

Pipeline axial defect detector

Technical Field

The utility model relates to a pipeline axial flaw detection appearance belongs to pipeline detection 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 pipeline axial flaw detector, this pipeline axial flaw detector internal sensor chip's position remain throughout with the parallel of pipeline internal surface to further improve the precision of detecting the pipeline.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a pipeline axial defect detector comprises a barrel, a plurality of probes and a plurality of magnetic steels, wherein the probes are arranged on the outer surface of the barrel at intervals along the circumferential direction of the barrel through an elastic support to form a detection ring;

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 respectively arranged obliquely with the bottom supporting strip, the two ends of the probe are respectively connected with the upper ends of the first supporting strip and the second supporting strip,

a third arc-shaped groove is formed in the outer surface, opposite to the first supporting bar, of the second supporting bar, and the third arc-shaped groove is close to the connecting position of the second supporting bar and the probe;

the probe further comprises a PCB substrate, 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 PCB substrate, and the eddy current detection chips are connected to the surface of the other side of the PCB substrate;

one side of the PCB base plate that carries on the back in the eddy current testing chip is provided with a second PCB board, is provided with at least two induction coil groups that correspond with the eddy current testing chip in this second PCB board, and this induction coil group is established ties along the coil of second PCB board thickness direction superpose by at least two-layer and forms, induction coil group's both ends are connected with the eddy current testing chip electricity respectively, PCB base plate, second PCB board, hall element and eddy current testing chip outside cladding have an epoxy layer.

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 number of the hall elements is 4.

3. In the above scheme, the hall elements are arranged at equal intervals outside one end of the second PCB.

4. In the above scheme, the number of layers of the coils stacked in the thickness direction of the second PCB is 4.

5. In the scheme, steel brushes are uniformly and densely distributed on the surface of each magnetic steel back to the cylinder.

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 pipeline axial defect detector, it can accurately detect pipeline defect on the axial, effectively discern defective position, defect nature etc. of pipeline, provide accurate data guide for the maintenance of pipeline; in addition, the lower ends of the first supporting bar and the second supporting bar are connected with the bottom supporting bar, the first supporting bar and the second supporting bar are obliquely arranged with the bottom supporting bar, two ends of the probe are respectively connected with the upper ends of the first supporting bar and the second supporting bar, the two obliquely arranged supporting bars, the bottom supporting bar and the probe enclose a parallelogram, so that the upper surface of the probe can always keep interference with the inner wall of the pipeline to be tested without damaging the probe, namely, the probe and the inner wall of the pipeline always keep a tight fit state, and the detection precision of a sensor in the probe is ensured; furthermore, a third arc-shaped groove is formed in the outer surface, back to the back, of the second supporting strip and the first supporting strip, the third arc-shaped groove is close to the joint of the second supporting strip and the probe, and the third arc-shaped groove is arranged, so that the elastic support has a space capable of being adjusted in a self-adaptive mode in the process of extrusion, the probe is guaranteed to be in face contact with the inner wall of the pipeline all the time, the position of a sensor chip in the probe is kept parallel to the inner surface of the pipeline all the time, and the detection precision of the pipeline is further improved.

2. The utility model discloses pipeline axial flaw detector, its probe further include PCB base plate, two at least hall element and two at least eddy current test chips, hall element connects in a side surface of PCB base plate, the eddy current test chip is connected in the opposite side surface of PCB base plate, and one side of the PCB base plate that carries on back to the eddy current test chip is provided with a second PCB board, is provided with two at least induction coil groups that correspond with the eddy current test chip in this second PCB board, sets up eddy current test module and magnetic leakage test module on same probe unit, makes every probe both can detect the size of pipeline defect, can judge the defect at pipeline inner wall or outer wall simultaneously, can also reduce half the use quantity of probe when improving detection precision, thereby reduce the size of the equipment that uses the probe of the invention greatly, make the operation of equipment in the pipeline more nimble, The bend-passing capability is stronger, the stability is high, and the operation risk is small; in addition, the induction coil group is formed by connecting at least two layers of coils in series in the thickness direction of the second PCB, and the induction capability to small magnetic field changes is enhanced and the detection precision and sensitivity are improved through the arrangement of the multiple layers of coils.

Drawings

FIG. 1 is a schematic diagram of the pipeline axial flaw detector of the present invention;

FIG. 2 is a schematic view of the local structure of the pipeline axial flaw detector of the present invention;

FIG. 3 is a schematic view of a local structure of a probe in the pipeline axial flaw detector of the present invention;

FIG. 4 is a side view of the local structure of the probe in the pipeline axial flaw detector of the present invention;

figure 5 is the utility model discloses the local structure plan view of probe among the pipeline axial flaw detector.

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

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 pipeline axial defect detector comprises a barrel 6, a plurality of probes 7 and a plurality of magnetic steels 8, wherein the probes 7 are arranged on the outer surface of the barrel 6 at intervals along the circumferential direction of the barrel 6 through an elastic support 11 to form a detection ring 9, the plurality of magnetic steels 8 are divided into two groups, each group of magnetic steels 8 are continuously distributed on the outer surface of the barrel 6 along the circumferential direction of the barrel 6 to form two magnetic rings 10, and the two magnetic rings 10 are respectively arranged on two sides of the detection ring 9;

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

a third arc-shaped groove 19 is formed in the outer surface, opposite to the first support bar 13, of the second support bar 14, and the third arc-shaped groove 19 is close to the connection position of the second support bar 14 and the probe 7;

the probe 7 further comprises a PCB (printed circuit board) substrate 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 PCB substrate 1, and the eddy current detection chips 3 are connected to the other side surface of the PCB substrate 1;

one side of the PCB substrate 1 back to the eddy current testing chip 3 is provided with a second PCB 4, and at least two induction coil groups 5 corresponding to the eddy current testing chip 3 are arranged in the second PCB 4, and each induction coil group 5 is formed by connecting at least two layers of coils in an overlapping mode along the thickness direction of the second PCB 4, two ends of each induction coil group 5 are respectively electrically connected with the eddy current testing chip 3, and the outer sides of the PCB substrate 1, the second PCB 4, the Hall element 2 and the eddy current testing chip 3 are coated with an epoxy resin layer.

Steel brushes are uniformly and densely distributed on the surface of each magnetic steel 8 back to the cylinder 6; the included angles between the first supporting strips 13, the second supporting strips 14 and the bottom supporting strips 15 are 45 degrees; the number of the hall elements 2 is 4;

for a single induction coil group 5, all coil layers are connected through via holes in the coils, 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 one via hole;

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

each induction coil group 5 is integrally connected with the PCB substrate 1 through a semicircular hole in a soldering manner.

Example 2: a pipeline axial defect detector comprises a barrel 6, a plurality of probes 7 and a plurality of magnetic steels 8, wherein the probes 7 are arranged on the outer surface of the barrel 6 at intervals along the circumferential direction of the barrel 6 through an elastic support 11 to form a detection ring 9, the plurality of magnetic steels 8 are divided into two groups, each group of magnetic steels 8 are continuously distributed on the outer surface of the barrel 6 along the circumferential direction of the barrel 6 to form two magnetic rings 10, and the two magnetic rings 10 are respectively arranged on two sides of the detection ring 9;

The included angles between the first supporting strips 13, the second supporting strips 14 and the bottom supporting strips 15 are 50 degrees; the Hall elements 2 are arranged at the outer side of one end of the second PCB 4 at equal intervals; the number of layers of the coils stacked in the thickness direction of the second PCB 4 is 4.

By adopting the pipeline axial defect detector, the axial 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 to be tested without damaging the probe, namely, the probe and the inner wall of the pipeline are always kept in a close fit state, and the detection precision of a sensor in the probe is ensured;

furthermore, the third arc-shaped part enables the elastic support to have a self-adaptive adjusting space in the extrusion process, so that the probe is ensured to be always in surface contact with the inner wall of the pipeline, namely the position of a sensor chip in the probe is always kept parallel to the inner surface of the pipeline, and the detection precision of the pipeline is further improved;

the eddy current detection module and the magnetic flux leakage detection module are arranged on the same probe unit, so that each probe can detect the size of the defect of the pipeline, judge the defect on the inner wall or the outer wall of the pipeline at the same time, and reduce the number of the probes used while improving the detection precision, thereby greatly reducing the size of equipment using the probe, and ensuring that the equipment can more flexibly run in the pipeline, has stronger capacity of passing through a curve, high stability and small running risk; in addition, the multi-layer coil enhances the sensing capability to tiny magnetic field changes, and improves the detection precision and sensitivity.

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. A pipeline axial flaw detector is characterized in that: the magnetic steel detection device comprises a barrel (6), a plurality of probes (7) and a plurality of magnetic steels (8), wherein the probes (7) are arranged on the outer surface of the barrel (6) at intervals along the circumferential direction of the barrel (6) through an elastic support (11) to form a detection ring (9), the plurality of magnetic steels (8) are divided into two groups, each group of magnetic steels (8) is continuously distributed on the outer surface of the barrel (6) along the circumferential direction of the barrel (6) to form two magnetic rings (10), and the two magnetic rings (10) are respectively arranged on two sides of the detection ring (9);

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

a third arc-shaped groove (19) is formed in the outer surface, opposite to the first supporting bar (13), of the second supporting bar (14), and the third arc-shaped groove (19) is close to the joint of the second supporting bar (14) and the probe (7);

the probe (7) further comprises a PCB (printed circuit board) substrate (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 PCB substrate (1), and the eddy current detection chips (3) are connected to the other side surface of the PCB substrate (1);

one side of PCB base plate (1) that carries on the back in eddy current testing chip (3) is provided with a second PCB board (4), is provided with at least two induction coil group (5) that correspond with eddy current testing chip (3) in this second PCB board (4), and this induction coil group (5) are established ties by at least two-layer coil along second PCB board (4) thickness direction superpose and are formed, the both ends of induction coil group (5) are connected with eddy current testing chip (3) electricity respectively, PCB base plate (1), second PCB board (4), hall element (2) and eddy current testing chip (3) outside cladding have an epoxy layer.

2. The pipe axial flaw detector according to claim 1, wherein: 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 pipe axial flaw detector according to claim 1, wherein: the number of the Hall elements (2) is 4.

4. The pipe axial flaw detector according to claim 1 or 3, wherein: the Hall elements (2) are arranged on the outer side of one end of the second PCB (4) at equal intervals.

5. The pipe axial flaw detector according to claim 1, wherein: the number of the coils stacked in the thickness direction of the second PCB board (4) is 4.

6. The pipe axial flaw detector according to claim 1, wherein: and steel brushes are uniformly and densely distributed on the surface of each magnetic steel (8) back to the cylinder body (6).