CN212056765U

CN212056765U - Pipeline magnetic leakage detection probe

Info

Publication number: CN212056765U
Application number: CN202020281555.9U
Authority: CN
Inventors: 李振北; 李卫全; 白港生; 王馨饶; 刘高菲; 程汉华; 于超
Original assignee: China Petroleum Pipeline Inspection Technologies Co ltd; China National Petroleum Corp; China Petroleum Pipeline Engineering Corp
Current assignee: China Petroleum Pipeline Inspection Technologies Co ltd; China National Petroleum Corp; China Petroleum Pipeline Engineering Corp
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-12-01
Anticipated expiration: 2030-03-09

Abstract

The utility model provides a pipeline magnetic leakage test probe belongs to the pipeline inspection field. Pipeline magnetic leakage test probe includes probe ring and a plurality of probe module, and a plurality of probe module circumference equidistance intervals are installed on the periphery wall of probe ring. Each probe module comprises a base, a first supporting arm, a second supporting arm and a shell, for any probe module, the base is fixed on the outer peripheral wall of the probe ring, the first end of the first supporting arm and the first end of the second supporting arm are hinged on the base, the first supporting arm and the second supporting arm are arranged in parallel, the shell is hinged between the second section of the first supporting arm and the second end of the second supporting arm, and the base, the first supporting arm, the second supporting arm and the shell are mutually enclosed to form a closed ring; the inner wall of the closed ring is laid with a supporting elastic strip, and a plurality of sensors for detecting a magnetic field are arranged in the shell. The pipeline magnetic leakage detection probe provided by the embodiment can be used for detecting complex pipelines.

Description

Pipeline magnetic leakage detection probe

Technical Field

The disclosure relates to the field of pipeline detection, in particular to a pipeline magnetic flux leakage detection probe.

Background

The pipeline detection technology is a safety and reliability evaluation technology developed for ensuring the safe and reliable operation of pipelines. The method can be divided into two main types of internal detection and external detection according to different relative positions of detection equipment and pipelines, and the pipeline internal detection technology generally comprises various technical methods such as geometric diameter measurement (pipeline deformation) detection, magnetic leakage corrosion detection, electromagnetic ultrasonic crack detection and the like. The leakage magnetic corrosion detection is based on that after the pipeline is magnetized, the defects existing on the surface or the near surface of the pipeline can generate a leakage magnetic field, so that the defects can be found by detecting the change of the leakage magnetic field.

In the related art, a pipeline magnetic flux leakage detection device is usually placed in a pipeline to detect the pipe wall of the pipeline, so as to determine the degree and specific position of the pipeline damage. Pipeline magnetic leakage detection device includes: the magnetic detection device comprises a permanent magnet and a probe, wherein in the pipeline detection, the permanent magnet is used for carrying out saturation magnetization on the pipe wall of the pipeline to form a magnetic loop in the pipe wall to be detected, when the pipe wall has no defects, magnetic lines of force are positioned in the pipe wall, and when the pipe wall has defects, the magnetic lines of force can penetrate out of the pipe wall to form a leakage magnetic field. And then, the probe is attached to the inner wall of the pipeline, and a leakage magnetic signal at the loss part of the pipeline is picked up through an inductor packaged on the probe, so that the damage degree and the damage position in the pipeline are determined, and fixed-point maintenance is carried out.

However, in the above pipe magnetic flux leakage detection device, since the probe is of a fixed structure and cannot deform on the inner wall of the pipe at will, when the shape of the pipe changes, the probe cannot be attached to the inner wall of the pipe, resulting in low detection accuracy.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a pipeline magnetic flux leakage detection probe, which can accurately and efficiently detect a pipeline and a complex position of the pipeline. The technical scheme is as follows:

the embodiment of the disclosure provides a pipeline magnetic leakage detection probe module, wherein the pipeline magnetic leakage detection probe comprises a probe ring and a plurality of probe modules, and the plurality of probe modules are circumferentially arranged on the outer peripheral wall of the probe ring at equal intervals;

each probe module comprises a base, a first supporting arm, a second supporting arm and a shell, for any probe module, the base is fixed on the peripheral wall of the probe ring, the first end of the first supporting arm and the first end of the second supporting arm are hinged on the base, the first supporting arm and the second supporting arm are arranged in parallel, the shell is hinged between the second end of the first supporting arm and the second end of the second supporting arm, the base, the first supporting arm, the second supporting arm and the shell enclose a closed ring, and hinge shafts among the base, the first supporting arm, the second supporting arm and the shell are parallel to the axis of the probe ring;

the inner wall of the closed ring is laid with a supporting elastic strip, the supporting elastic strip is a U-shaped structural member, the first end of the supporting elastic strip is arranged on the first supporting arm, the middle part of the supporting elastic strip is arranged on the base, and the second end of the supporting elastic strip is arranged on the second supporting arm;

a plurality of sensors for detecting magnetic fields are mounted in the housing.

In an implementation design of the present disclosure, a first installation portion and a second installation portion are arranged on the casing, the first installation portion and the second installation portion are located on two opposite sides of the casing, the first installation portion and the second installation portion are internally provided with a plurality of sensors.

In another implementation design of the disclosure, a plurality of ceramic posts are mounted on the housing, and the ceramic posts are respectively arranged on a side surface of the base away from the first mounting portion and a side surface of the base away from the second mounting portion.

In another implementation design of the present disclosure, the first mounting portion and the second mounting portion are far away from a side surface of the base, the side surface of the base is back to the base and extends to form an outer protrusion, the ceramic column is mounted on the outer protrusion, and the sensor is mounted inside the outer protrusion.

In yet another implementation of the present disclosure, the supporting elastic strip includes a first spring segment, a second spring segment and a third spring segment, the first spring segment is mounted on the first supporting arm, the second spring segment is mounted on the second supporting arm, and the third spring segment is fixed on the base.

In another implementation design of the present disclosure, a first limiting shaft is disposed on one side of the first support arm facing the second support arm, two ends of the first limiting shaft are fixed to the first support arm, an axis of the first limiting shaft is perpendicular to a length direction of the first support arm, and one side of the first spring segment is inserted between the first limiting shaft and the first support arm.

In another implementation design of the present disclosure, a second limiting shaft is disposed on one side of the second support arm facing the first support arm, two ends of the second limiting shaft are fixed to the second support arm, an axis of the second limiting shaft is perpendicular to a length direction of the second support arm, and the other side of the first spring segment is inserted between the second limiting shaft and the second support arm.

In yet another embodiment of the disclosure, a plurality of supporting resilient pressing plates are further mounted on a side of the base facing the housing, and the third spring segment is sandwiched between each of the supporting resilient pressing plates and the base.

In another implementation design of the present disclosure, a shock absorbing pad is mounted on an outer side wall of the first support arm near the position of the housing, and the shock absorbing pad is fixed on the first support arm through a lock nut.

In yet another implementation of the present disclosure, the probe ring is a floating probe ring.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

pipeline magnetic leakage test probe that provides through this embodiment is carrying out the magnetic leakage to the pipeline and detecting time measuring, stretches into the pipeline inner wall with the probe ring, and probe ring and pipeline coaxial arrangement, the probe orientation awaits measuring the inner wall of pipeline. Because the probe comprises a base, a first supporting arm, a second supporting arm and a shell, and the base, the first supporting arm, the second supporting arm and the shell are mutually hinged to form a closed ring, the closed ring is actually a parallelogram and can be randomly deformed. Moreover, because the supporting elastic strip is arranged in the closed ring, the closed ring can be pre-stressed with a certain pre-tightening supporting force through the supporting elastic strip, and the stability of the closed ring in the using process is ensured. When the pipeline magnetic leakage test probe moves along the axis of the pipeline, because the hinge shaft between the base, the first supporting arm, the second supporting arm and the shell is all parallel to the axis of the probe ring, the closed ring can deform adaptively along with the movement of the pipeline magnetic leakage test probe, and further the test probe has certain pipeline deformability, so that the probe can detect various defects and complex pipelines, and the applicability of the pipeline magnetic leakage test probe is improved. The pipeline magnetic leakage detection probe provided in the embodiment is simple in structure, convenient to use and high in applicability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pipeline magnetic flux leakage detection probe provided in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a probe module provided in this embodiment;

FIG. 3 is a schematic view of another angle of the magnetic flux leakage detecting probe for a pipeline according to the present embodiment;

fig. 4 is a schematic diagram of the arrangement of sensors inside the housing provided in the present embodiment;

FIG. 5 is a top view of the probe module provided in this embodiment;

fig. 6 is a schematic view illustrating the use of the probe module and the inner wall of the pipe to be tested according to this embodiment;

fig. 7 is a schematic structural view of another angle of the probe module provided in this embodiment;

fig. 8 is a diagram showing a state of use of the pipe leakage flux detection probe according to the present embodiment.

The symbols in the drawings represent the following meanings:

1. a probe ring; 10. mounting holes;

2. a probe module; 20. a closed ring; 201. supporting the elastic strip; 21. a base; 2011. a first spring segment; 2012. a second spring segment; 2013. a third spring segment; 212. supporting the elastic pressing sheet; 210. a mounting cavity;

22. a first support arm; 221. a first limit shaft; 222. a cushioning pad; 23. a second support arm; 231. a second limit shaft; 24. a housing; 241. a first mounting portion; 242. a second mounting portion; 243. an outer protrusion;

3. and (4) ceramic posts.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The embodiment of the present disclosure provides a pipeline magnetic leakage detection probe, as shown in fig. 1, pipeline magnetic leakage detection probe includes probe ring 1 and a plurality of probe modules 2, and the 2 circumference equidistance intervals of a plurality of probe modules are installed on the periphery wall of probe ring 1.

Fig. 2 is a schematic structural diagram of the probe module provided in this embodiment, with reference to fig. 2, each probe module 2 includes a base 21, a first support arm 22, a second support arm 23, and a housing 24, for any probe module 2, the base 21 is fixed on the outer peripheral wall of the probe ring 1, a first end of the first support arm 22 and a first end of the second support arm 23 are both hinged on the base 21, the first support arm 22 and the second support arm 23 are arranged in parallel, the housing 24 is hinged between a second end of the first support arm 22 and a second end of the second support arm 23, the base 21, the first support arm 22, the second support arm 23, and the housing 24 enclose a closed ring 20, and hinge axes between the base 21, the first support arm 22, the second support arm 23, and the housing 24 are all parallel to an axis of the probe ring 1.

The inner wall of the closed ring 20 is laid with a supporting elastic strip 201, the supporting elastic strip 201 is a U-shaped structural member, a first end of the supporting elastic strip 201 is installed on the first supporting arm 22, the middle part of the supporting elastic strip 201 is installed on the base 21, and a second end of the supporting elastic strip 201 is installed on the second supporting arm 23.

The housing 24 houses a plurality of sensors for detecting the magnetic field.

Pipeline magnetic leakage test probe that provides through this embodiment is carrying out the magnetic leakage to the pipeline and examining time measuring, stretches into pipeline inner wall with probe ring 1, and probe ring 1 and pipeline are coaxial to be arranged, and probe module 2 is towards the inner wall of the pipeline that awaits measuring. Since the probe module 2 includes the base 21, the first support arm 22, the second support arm 23 and the housing 24, and the base 21, the first support arm 22, the second support arm 23 and the housing 24 are hinged to each other to form the closed loop 20, the closed loop 20 is actually a parallelogram and can be deformed freely. Moreover, because the supporting elastic strip 201 is installed in the closed ring 20, the closed ring 20 can have a certain pre-tightening supporting force in advance through the supporting elastic strip 201, and the stability of the closed ring 20 in the using process is ensured. When the pipeline magnetic leakage detection probe moves along the axis of the pipeline, because the hinge shaft between the base 21, the first supporting arm 22, the second supporting arm 23 and the shell 24 is all parallel to the axis of the probe ring 1, the closed ring 20 can deform adaptively along with the movement of the pipeline magnetic leakage detection probe, and further the detection probe has certain pipeline deformation capacity, so that the probe module 2 can detect various defects and complex pipelines, and the applicability of the pipeline magnetic leakage detection probe is improved. The pipeline magnetic leakage detection probe provided in the embodiment is simple in structure, convenient to use and high in applicability.

Fig. 3 is another schematic angle view of the pipeline magnetic flux leakage detection probe provided in this embodiment, and with reference to fig. 3, exemplarily, the probe ring 1 is a floating probe ring, and a plurality of mounting holes 10 are provided on an outer wall of the probe ring 1, and the probe module 2 is installed in the mounting hole 10.

In the above implementation, the mounting holes 10 are used for mounting the probe modules 2, so that the probe modules 2 are firmly mounted with the probe ring 1. In addition, the probe ring 1 is a floating probe ring, so the probe ring 1 can perform small-range overall radial and circumferential floating on a detector according to the condition of the pipeline, and the adaptability and the detection effect of the pipeline magnetic flux leakage detection probe are further improved.

Illustratively, each probe module 2 is circumferentially and uniformly arranged in corresponding mounting holes 10 on the floating probe ring 1 by using hexagon socket head cap screws (not shown), elastic washers (not shown), flat washers (not shown) and locking nuts (not shown), so as to form the pipeline magnetic flux leakage detection probe in the embodiment. Moreover, after all the probe modules 2 are arranged on the floating probe ring, the probe modules 2 are independent from each other and do not influence each other, and 100% of the circumferential full coverage of the pipeline can be realized in the detection process.

Referring to fig. 2 again, optionally, a first mounting portion 241 and a second mounting portion 242 are disposed on the housing 24, the first mounting portion 241 and the second mounting portion 242 are located on two opposite sides of the housing 24, and a plurality of sensors are mounted inside the first mounting portion 241 and the second mounting portion 242.

In the above implementation manner, since the casing 24 is provided with the first mounting portion 241 and the second mounting portion 242, and the first mounting portion 241 and the second mounting portion 242 are located at two sides of the casing 24, the sensor on the probe can circumferentially cover the casing 24 more comprehensively, and has higher acquisition density, so that the data acquisition effect of each probe is maximized, and further, the detection efficiency and the reliability are improved.

Illustratively, the first mounting portions 241 and the second mounting portions 242 are staggered on opposite sides of the housing 24, where the staggering is that the first mounting portions 241 and the second mounting portions 242 are sequentially disposed on the housing 24 along the length of the housing 24. This may further allow for more complete circumferential coverage of the housing 24 with the sensors on each probe.

Fig. 4 is a schematic diagram of an arrangement of sensors inside the housing provided in the present embodiment, and with reference to fig. 4, exemplarily, the housing 24 is an S-shaped structural member, the first mounting portion 241 and the second mounting portion 242 form an arc of an S shape, and the sensors enclosed inside the first mounting portion 241 and the second mounting portion 242 are arranged in a double-row staggered manner along the width of the housing 24, a first row of sensors (row a) and a second row of sensors (row B) are mounted on the first mounting portion 241, a third row of sensors (row C) and a fourth row of sensors (row D) are mounted on the second mounting portion 242, and the number of each row of sensors can be reasonably designed according to specific use.

In above-mentioned implementation, above setting up can be so that the surface of casing 24 has more comprehensive circumference cover interval and higher collection density for every magnetic leakage test probe's data acquisition effect maximize, and then guarantee the accuracy of detecting the result.

Fig. 5 is a top view of the probe module provided in this embodiment, and in conjunction with fig. 5, optionally, a plurality of ceramic posts 3 are mounted on the housing 24, and the plurality of ceramic posts 3 are respectively disposed on a side surface of the first mounting portion 241 away from the base 21 and a side surface of the second mounting portion 242 away from the base 21.

In the above implementation manner, when the shell 24 of the probe is attached to the pipeline to be detected, the ceramic column 3 prevents the outer surface of the shell 24 from directly contacting the inner wall of the pipeline to be detected to cause abrasion of the shell 24, thereby affecting normal use of the magnetic flux leakage detection probe.

Fig. 6 is a schematic view of the probe module and the inner wall of the pipe to be measured provided by this embodiment, in combination with fig. 6, optionally, one side surfaces of the first mounting portion 241 and the second mounting portion 242 away from the base 21 extend away from the base 21 and form an outer protrusion 243, the ceramic column 3 is mounted on the outer protrusion 243, and the sensor is mounted inside the outer protrusion 243.

In the above implementation manner, the outer surface of the shell 24 protrudes towards the inner wall of the pipeline due to the arrangement of the outer protrusion 243, so that the influence of the pipeline inner wall on the pipeline magnetic flux leakage detection probe in the pipeline weld seam detection process is minimal, and the pipeline magnetic flux leakage detection probe cannot be well attached to the inner wall of the pipeline due to the fact that the pipeline is clamped.

Illustratively, the ceramic posts 3 and the sensor are pre-packaged with the sensor entirely at the topmost end of the outer protrusion 243, the exterior of the outer protrusion 243 being protected by the ceramic posts 3. Then, two opposite side edges of the shell 24 are respectively installed on the corresponding hole sites of the first supporting arm 22 and the second supporting arm 23 by snap nails.

In addition, it should be noted that the dotted line shown in fig. 6 is a case where the probe module 2 is deformed to accommodate the inner wall of the pipe having a different shape.

Fig. 7 is a schematic structural view of another angle of the probe module provided in this embodiment, and in combination with fig. 7, for example, the first support arm 22 and the second support arm 23 are both mounted on corresponding hole locations on two sides of the base 21 through an inner hexagon screw (not shown), a flat pad (not shown), and a lock nut (not shown).

Optionally, the supporting elastic strip 201 includes a first spring segment 2011, a second spring segment 2012 and a third spring segment 2013, the ends of which are connected together, the first spring segment 2011 is installed on the first supporting arm 22, the second spring segment 2012 is installed on the second supporting arm 23, and the third spring segment 2013 is fixed on the base 21.

In the above implementation manner, since the probe is formed by hinging the base 21, the first supporting arm 22, the second supporting arm 23 and the shell 24, the closed ring 20 is actually a variable parallelogram, the supporting elastic strip 201 is arranged to ensure that the closed ring 20 has a certain pre-tightening supporting force in advance, the closed ring 20 is ensured to have a certain supporting force and a certain resilience, and then the whole detection probe has a deformation stretching function in a certain range, and finally the detection probe has a certain pipeline deformation passing capacity to adapt to size detection of different specifications.

For example, when the inner diameter of the pipe to be measured is large, the sealing ring 20 is a rectangular frame in advance, the axes of the first support arm 22 and the second support arm 23 are perpendicular to the outer wall of the pipe, and the shell 24 is in direct contact with the inner wall of the pipe, if the inner diameter of the pipe to be measured becomes small, the sealing ring 20 gradually deforms under the resistance of the inner wall of the pipe, the rectangular frame is changed into a conventional parallelogram, that is, the first support arm 22 and the second support arm 23 are in an inclined state, and at this time, the support elastic strip 201 deforms and generates elastic force along with the sealing ring 20. When the inner diameter of the pipeline is increased, the closed ring 20 gradually changes from a conventional parallelogram to a rectangular frame under the action of the supporting elastic strip 201 until the shell 24 is in direct contact with the inner wall of the pipeline for testing.

Optionally, one side of the first support arm 22 facing the second support arm 23 is provided with a first limiting shaft 221, two ends of the first limiting shaft 221 are fixed on the first support arm 22, an axis of the first limiting shaft 221 is perpendicular to a length direction of the first support arm 22, and one side of the first spring segment 2011 is inserted between the first limiting shaft 221 and the first support arm 22.

In the above implementation manner, the first limiting shaft 221 is configured to insert the first spring segment 2011 between the first limiting shaft 221 and the first supporting arm 22, so that one side of the supporting elastic strip 201 can be relatively mounted on the first supporting arm 22, and it is ensured that the first spring segment 2011 can move synchronously with the first supporting arm 22.

Illustratively, the first spring segment 2011 may be movably inserted between the first limit shaft 221 and the first support arm 22.

In this way, when the closed ring 20 deforms, a certain relative displacement may be generated between the first spring segment 2011 and the first support arm 22, so as to prevent the first spring segment 2011 or the first support arm 22 from being broken due to an excessive force.

It should be noted that, when the first spring segment 2011 is movably inserted between the first limiting shaft 221 and the first supporting arm 22, one end of the first spring segment 2011 departing from the base 21 is further away from the base 21 than the first limiting shaft 221, so as to ensure that the first spring segment 2011 does not depart from between the first limiting shaft 221 and the first supporting arm 22 when the seal ring 20 is deformed.

Optionally, one side of the second support arm 23 facing the first support arm 22 is provided with a second limiting shaft 231, two ends of the second limiting shaft 231 are fixed on the second support arm 23, an axis of the second limiting shaft 231 is perpendicular to a length direction of the second support arm 23, and the other side of the first spring segment 2011 is inserted between the second limiting shaft 231 and the second support arm 23.

In the implementation manner, the second limiting shaft 231 is arranged to insert the second spring segment 2012 between the second limiting shaft 231 and the second supporting arm 23, so that the other side of the supporting elastic strip 201 is relatively mounted on the second supporting arm 23, and the second spring segment 2012 can move synchronously with the second supporting arm 23.

For example, the second spring segment 2012 may be movably inserted between the second limiting shaft 231 and the second supporting arm 23.

In this way, when the closed loop 20 is deformed, a certain relative displacement can be generated between the second spring segment 2012 and the second supporting arm 23 to prevent the second spring segment 2012 or the second supporting arm 23 from being broken due to an excessive force.

It should be noted that, when the second spring segment 2012 is movably inserted between the second limiting shaft 231 and the second supporting arm 23, an end of the second spring segment 2012 departing from the base 21 is further away from the base 21 than the second limiting shaft 231, so as to ensure that the second spring segment 2012 is not separated from between the second limiting shaft 231 and the second supporting arm 23 when the sealing ring 20 is deformed.

Optionally, a plurality of supporting resilient tabs 212 are also mounted on a side of the base 21 facing the housing 24, with a third spring segment 2013 interposed between each supporting resilient tab 212 and the base 21.

In the above implementation, the supporting resilient tab 212 is used to clip the third spring segment 2013 onto the base 21 to ensure that the third spring segment 2013 will not disengage from the base 21 when the closure ring 20 is deformed.

Optionally, a mounting cavity 210 is formed between the supporting elastic pressing sheet 212 and the base 21, the third spring segment 2013 is inserted into the mounting cavity 210, and the supporting elastic pressing sheet 212 and the third spring segment 2013 are fixed together on the base 21 by screws.

In the implementation manner, the installation cavity 210 is configured to enable the third spring segment 2013 to be smoothly inserted into the installation cavity 210, and meanwhile, the third spring segment 2013 is ensured to have a space to deform.

Illustratively, the third spring segment 2013 may be secured to the base 21 by a socket head cap screw (not shown), a resilient washer (not shown), a flat washer (not shown), and a supporting resilient tab 212. And a through hole is formed in the middle of the third spring segment 2013, and a screw with a sheep eye is arranged in the through hole to screw and install the third spring segment 2013 in the corresponding threaded hole of the base 21.

Optionally, the outer side wall of the first support arm 22 near the housing 24 is provided with a shock absorbing pad 222, and the shock absorbing pad 222 is fixed on the first support arm 22 by a lock nut.

In the above implementation manner, the arrangement of the vibration damping pad 222 can enable the pipeline magnetic leakage detection probe to maximally avoid the rigid impact and the bounce generated by the rigid impact during the contact process of the pipeline magnetic leakage detection probe and the welding line in the inner wall of the pipeline when the pipeline magnetic leakage detection probe extends into the inner wall of the pipeline for detection, so as to ensure that the detection probe is stably contacted with the inner wall of the pipeline in real time, and further obtain a good detection effect.

Illustratively, the shock absorbing pad 222 is fixed to the outer surface of the first support arm 22 by a cross-recessed countersunk screw (not shown), a flat washer (not shown), and a lock nut (not shown).

The operation of the magnetic flux leakage detection probe provided in this embodiment is briefly described as follows:

firstly, the magnetic flux leakage detection probe provided by the embodiment is installed on corresponding detection equipment (see fig. 8), then the detection equipment is placed in the inner wall of the pipeline to be detected, the closed ring 20 is adjusted, so that the sensor encapsulated on the shell 24 is located at a proper position of the inner wall of the pipeline, and the inner wall of the pipeline is detected by the sensor in the shell 24, so that whether the inner wall of the pipeline has defects or not can be clearly determined. In the embodiment of the present invention, the probe module 2 includes a base 21, a first supporting arm 22, a second supporting arm 23 and a housing 24, and the base 21, the first supporting arm 22, the second supporting arm 23 and the housing 24 are hinged to each other to form a closed ring 20, so that the closed ring 20 is a parallelogram in practice and can deform at will. And, because the support elastic strip 201 is equipped with in the closed ring 20 again, so can make this closed ring 20 have certain pretension holding power in advance through supporting elastic strip 201, guarantee the stability of this closed ring 20 in the use, and then make whole test probe have the flexible function of deformation of certain scope, can carry out the self-adaptation according to the tee bend that meets in the pipeline, the valve, reducing and the sunken condition of deformation and float, improve the detection precision of these complicated positions department, finally make test probe possess certain pipeline deformation throughput, for the magnetic leakage corrosion detection of metal pipeline provides reliable technical guarantee, to improving detection efficiency and the reliability of long-distance pipeline in service, guarantee safe and stable operation and have great realistic meaning.

The pipeline magnetic leakage detection probe provided by the embodiment can obviously improve the resolution ratio of corrosion detection of the metal pipeline based on the magnetic leakage principle. Compared with the traditional high-definition detection, the method can be used for clearly and accurately judging and detecting the defects of circumferential weld joints such as serious corrosion pipelines, bacterial pinhole corrosion, pinhole gathering areas, large-area corrosion, corrosion on pipe tops, microbial induced corrosion, circumferential weld joint corrosion (unfused and not welded through) and the like, wherein the diameter of each extremely-fine pinhole is less than 1 millimeter (0.04 inch), and the like, so that the integrity management and the evaluation technical level of the pipelines are greatly improved.

The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.

Claims

1. The pipeline magnetic flux leakage detection probe is characterized by comprising a probe ring (1) and a plurality of probe modules (2), wherein the probe modules (2) are circumferentially and equidistantly installed on the outer peripheral wall of the probe ring (1) at intervals;

every probe module (2) all includes base (21), first support arm (22), second support arm (23) and casing (24), and to any one probe module (2), base (21) are fixed on the periphery wall of probe ring (1), the first end of first support arm (22) reaches the first end of second support arm (23) all articulates on base (21), just first support arm (22) reach second support arm (23) parallel arrangement each other, casing (24) articulate the second end of first support arm (22) with between the second end of second support arm (23), base (21), first support arm (22), second support arm (23) and casing (24) enclose into a closed ring (20) each other, just base (21), first support arm (22), The hinge shaft between the second supporting arm (23) and the shell (24) is parallel to the axis of the probe ring (1);

a supporting elastic strip (201) is laid on the inner wall of the closed ring (20), the supporting elastic strip (201) is a U-shaped structural member, a first end of the supporting elastic strip (201) is installed on the first supporting arm (22), the middle part of the supporting elastic strip (201) is installed on the base (21), and a second end of the supporting elastic strip (201) is installed on the second supporting arm (23);

the housing (24) houses a plurality of sensors for detecting the magnetic field.

2. The pipe flux leakage detection probe according to claim 1, wherein a first mounting portion (241) and a second mounting portion (242) are provided on the housing (24), the first mounting portion (241) and the second mounting portion (242) are located on two opposite sides of the housing (24), the first mounting portion (241) and the second mounting portion (242) are all provided with a plurality of sensors.

3. The pipeline magnetic flux leakage detection probe according to claim 2, wherein a plurality of ceramic posts (3) are mounted on the housing (24), the ceramic posts (3) are respectively arranged on a side surface of the base (21) away from the first mounting portion (241) and a side surface of the base (21) away from the second mounting portion (242).

4. The pipe leakage magnetic detection probe according to claim 3, wherein the first mounting portion (241) and the second mounting portion (242) are far away from a side surface of the base (21) and are back to the base (21) to extend and form an outer protrusion (243), the ceramic column (3) is mounted on the outer protrusion (243), and the sensor is mounted inside the outer protrusion (243).

5. The pipe leakage detection probe according to claim 1, wherein the supporting elastic strip (201) comprises a first spring segment (2011), a second spring segment (2012) and a third spring segment (2013) which are connected together at ends, the first spring segment (2011) is installed on the first supporting arm (22), the second spring segment (2012) is installed on the second supporting arm (23), and the third spring segment (2013) is fixed on the base (21).

6. The pipe flux leakage detection probe according to claim 5, wherein a first limit shaft (221) is arranged on one side of the first support arm (22) facing the second support arm (23), two ends of the first limit shaft (221) are fixed on the first support arm (22), an axis of the first limit shaft (221) is perpendicular to a length direction of the first support arm (22), and one side of the first spring segment (2011) is inserted between the first limit shaft (221) and the first support arm (22).

7. The magnetic flux leakage detection probe for the pipeline according to claim 6, wherein a second limiting shaft (231) is arranged on one side of the second support arm (23) facing the first support arm (22), two ends of the second limiting shaft (231) are fixed on the second support arm (23), an axis of the second limiting shaft (231) is perpendicular to a length direction of the second support arm (23), and the other side of the first spring segment (2011) is inserted between the second limiting shaft (231) and the second support arm (23).

8. The magnetic flux leakage inspection probe according to claim 5, wherein a plurality of supporting resilient pressing pieces (212) are further installed on a side of the base (21) facing the housing (24), and the third spring segment (2013) is interposed between each of the supporting resilient pressing pieces (212) and the base (21).

9. The magnetic flux leakage detection probe for the pipeline according to any one of claims 1 to 8, wherein a shock absorption pad (222) is mounted on an outer side wall of the first support arm (22) near the housing (24), and the shock absorption pad (222) is fixed on the first support arm (22) through a lock nut.

10. The pipe flux leakage detection probe according to any one of claims 1 to 8, wherein said probe ring (1) is a floating probe ring.