CN212228812U

CN212228812U - Probe module of pipeline magnetic leakage detector

Info

Publication number: CN212228812U
Application number: CN202020801636.7U
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: 2020-12-25
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a probe module of pipeline magnetic leakage detector, include the elastic support and install the test probe on the elastic support, the elastic support includes parallel arrangement's first support bar, second support bar and connection the end support bar of first support bar, second support bar, test probe further includes first PCB board, sets up in second PCB board, two at least hall element and two at least vortex detection chips of first PCB board one side, be provided with two at least induction coil that correspond with the vortex detection chip in the second PCB board, every induction coil's both ends all stretch out from a terminal surface of second PCB board to with the terminal surface welded connection of first PCB board, it has a third arc wall to open on the surface that second support bar and first support bar carried on the back mutually. The utility model discloses can avoid signal attenuation and loss, improve the detection precision and the sensitivity of eddy current testing chip, can also attenuate the holistic thickness of probe.

Description

Probe module of pipeline magnetic leakage detector

Technical Field

The utility model relates to a pipeline magnetic leakage detector's probe module 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 magnetic leakage detector's probe module, this pipeline magnetic leakage detector's probe module can avoid signal attenuation and loss, improves the detection precision and the sensitivity of eddy current testing chip, can also attenuate the holistic thickness of probe.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a probe module of a pipeline magnetic flux leakage detector comprises an elastic support and a detection probe installed on the elastic support, wherein 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 respective 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 in an inclined manner with the bottom supporting strip, and the two ends of the detection probe are respectively connected with the respective upper ends of the first supporting strip and the second supporting strip;

the detection 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 one side surface of the first PCB, the eddy current detection chips are connected to the other side surface of the first PCB, which is opposite to the second PCB, and are electrically conducted 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;

and a third arc-shaped groove is formed in the outer surface, back to the first supporting bar, of the second supporting bar, and the third arc-shaped groove is close to the joint of the second supporting bar and the detection probe.

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

1. in the scheme, the surface of the detection probe, which is back to the bottom support strip, is connected with a wear-resistant layer.

2. In the scheme, the wear-resistant layer is a chromium oxide ceramic sheet layer.

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

4. In the above scheme, the number of the hall elements is 4.

5. In the above scheme, 4 induction coils are uniformly laid on the second PCB.

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 the probe module of pipeline magnetic leakage detector, its respective lower extreme and the sole brace bar of first support bar, second support bar are connected, and this first support bar, second support bar are the slope setting respectively with between the sole brace bar, the both ends of test probe are connected with the respective upper end of first support bar, second support bar respectively, and the support bar that two slopes set up encloses into a parallelogram with sole brace bar, test probe, can make the upper surface of probe and the pipeline inner wall that awaits measuring keep the interference all the time and can not damage the probe, promptly probe and pipeline inner wall keep closely laminating state all the time, thereby guarantee the detection precision of sensor in the probe; 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 detection probe, the third arc-shaped groove is arranged, the elastic support is provided with a space capable of being adjusted in a self-adaptive mode in the process of being extruded, surface contact is guaranteed to be kept between the probe and 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 the probe module of pipeline magnetic leakage detector, its sounding probe further include first PCB board, set up in second PCB board, two at least Hall components and two at least eddy current detection chips of first PCB board one side, Hall components connect in one side surface of first PCB board, the eddy current detection chip is connected in the first PCB board and is carried on opposite side surface of second PCB board mutually to switch on with first PCB board electricity, make the probe can both 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 the detection precision, thus reduce the size of the equipment that uses the probe of this invention greatly, make the operation of equipment in the pipeline more nimble, the ability of crossing the bend stronger, stability is high, the running risk is little; in addition, two ends of each induction coil extend out of one end face of the second PCB and are welded and connected with the end face of the first PCB, and by means of welding the end faces of the two PCBs, not only can the two PCBs be fixedly connected, but also the communication connection between the induction coil and the eddy current detection chip can be realized, and the interference of conductive metal laid on the connecting surface of the two PCBs on the coil can be avoided, so that signal attenuation and loss can be avoided, the detection precision and sensitivity of the eddy current detection chip can be improved, and the integral thickness of the probe can be reduced; in addition, the surface of the detection probe, which is back to the bottom support bar, is connected with a wear-resistant layer, the wear-resistant layer is a chromium oxide ceramic sheet layer, and the arrangement of the ceramic wear-resistant layer can not generate interference influence on the coil and the eddy current detection chip, can protect the probe from being worn, prolong the service life of the probe and ensure the test precision and stability of the probe.

Drawings

FIG. 1 is a schematic structural diagram of a probe module of the pipeline magnetic flux leakage detector of the present invention;

FIG. 2 is a schematic view of a local structure of a detection probe in a probe module of the magnetic flux leakage detector;

FIG. 3 is a schematic view of a local structure of a detection probe in a probe module of the magnetic flux leakage detector of the present invention;

fig. 4 is the utility model discloses detect probe local structure cross-sectional view in magnetic leakage detector's the probe module.

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 first connecting column; 11. an elastic support; 12. detecting a probe; 13. a first support bar; 14. a second supporting strip; 15. a bottom support bar; 16. A wear layer; 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 probe module of a pipeline magnetic flux leakage detector comprises an elastic support 11 and a detection probe 12 installed on the elastic support 11, wherein 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 in an inclined manner with the bottom supporting strip 15, and the two ends of the detection probe 12 are respectively connected with the respective upper ends of the first supporting strip 13 and the second supporting strip 14;

the detection probe 12 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 welded with the end face of the first PCB 1 to form a first connecting column 6;

a third arc-shaped groove 19 is formed on the outer surface of the second supporting strip 14 opposite to the first supporting strip 13, and the third arc-shaped groove 19 is close to the connection part of the second supporting strip 14 and the detection probe 12.

The included angles between the first supporting strips 13, the second supporting strips 14 and the bottom supporting strips 15 are 55 degrees; the number of the hall elements 2 is 4; 4 induction coils 5 are uniformly laid on the second PCB 4;

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 1 with the welded mode, plays signal transmission and fixed effect simultaneously, avoids 1 shop copper of first PCB board to cause the influence to eddy current testing, all connects in order to walk the mode of line between the device, provides the condition for drawing the distance of two blocks of PCB boards near, can be better reduce probe thickness.

Example 2: a probe module of a pipeline magnetic flux leakage detector comprises an elastic support 11 and a detection probe 12 installed on the elastic support 11, wherein 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 in an inclined manner with the bottom supporting strip 15, and the two ends of the detection probe 12 are respectively connected with the respective upper ends of the first supporting strip 13 and the second supporting strip 14;

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;

The surface of the detection probe 12 opposite to the bottom support strip 15 is connected with a wear-resistant layer 16; the wear-resistant layer 16 is a chromium oxide ceramic sheet layer; the included angle between the first supporting bar 13, the second supporting bar 14 and the bottom supporting bar 15 is 45 °.

By adopting the probe module of the pipeline magnetic flux leakage detector, the two obliquely arranged support bars, the bottom support bar and the detection 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 detected without damaging the probe, namely, the probe and the inner wall of the pipeline are always kept in a tight 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;

in addition, the probe can detect the size of the pipeline defect, can judge whether the defect is on the inner wall or the outer wall of the pipeline simultaneously, and can reduce the number of the probes by half while improving the detection precision, thereby greatly reducing the size of equipment using the probe, and leading the equipment to have more flexible operation in the pipeline, stronger bend-passing capability, high stability and less operation risk;

in addition, by welding the end faces of the two PCBs, the two PCBs are fixedly connected, the communication connection between the induction coil and the eddy current detection chip is realized, and the interference of conductive metal laid on the connected surfaces of the two PCBs on the coil is 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;

in addition, the ceramic wear-resistant layer does not interfere and influence coils and eddy current detection chips, the probe can be protected from abrasion, the service life of the probe is prolonged, and the test precision and stability of the probe are guaranteed.

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 pipeline magnetic leakage detector's probe module which characterized in that: the detection device comprises an elastic support (11) and a detection probe (12) installed on the elastic support (11), wherein 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 in an inclined manner with the bottom supporting strip (15), and the two ends of the detection probe (12) are respectively connected with the respective upper ends of the first supporting strip (13) and the second supporting strip (14);

the detection probe (12) 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;

and a third arc-shaped groove (19) is formed in the outer surface of the second supporting strip (14) opposite to the first supporting strip (13), and the third arc-shaped groove (19) is close to the joint of the second supporting strip (14) and the detection probe (12).

2. The probe module of the pipeline magnetic leakage detector as claimed in claim 1, wherein: and the surface of the detection probe (12) opposite to the bottom support strip (15) is connected with a wear-resistant layer (16).

3. The probe module of the pipeline magnetic leakage detector as claimed in claim 2, wherein: the wear-resistant layer (16) is a chromium oxide ceramic sheet layer.

4. The probe module of the pipeline magnetic leakage detector as claimed in 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.

5. The probe module of the pipeline magnetic leakage detector as claimed in claim 1, wherein: the number of the Hall elements (2) is 4.

6. The probe module of the pipeline magnetic leakage detector as claimed in claim 1, wherein: the 4 induction coils (5) are uniformly laid on the second PCB (4).