CN215953467U - Axial magnetic flux leakage detector for pipeline - Google Patents
Axial magnetic flux leakage detector for pipeline Download PDFInfo
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- CN215953467U CN215953467U CN202020320279.2U CN202020320279U CN215953467U CN 215953467 U CN215953467 U CN 215953467U CN 202020320279 U CN202020320279 U CN 202020320279U CN 215953467 U CN215953467 U CN 215953467U
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Abstract
The utility model discloses an axial magnetic flux leakage detector for a pipeline, which comprises a first cylinder, a second cylinder, a plurality of numerical control boxes arranged on the outer surface of the first cylinder, a plurality of first probes arranged on the outer surface of the second cylinder and a plurality of first magnetic steels, wherein the first cylinder and the second cylinder are connected through a chain, the plurality of numerical control boxes are arranged at equal intervals along the circumferential direction of the first cylinder, the plurality of first probes are arranged at equal intervals along the circumferential direction of the second cylinder, the first probes are electrically connected with the numerical control boxes, the plurality of first magnetic steels are averagely divided into two groups, each group of first magnetic steels are respectively and continuously arranged along the circumferential direction of the second cylinder, and steel brushes are uniformly and densely distributed on each first magnetic steel, so that two magnetic rings are formed. The utility model can move in the pipeline with 15% of deformation, accurately detect the axial defects in the passing pipeline and effectively identify the defect positions and defect properties of the pipeline.
Description
Technical Field
The utility model relates to an axial magnetic flux leakage detector for a pipeline, and belongs to the technical field of pipeline detection.
Background
The pipeline is an important facility for transporting liquid and gas, and is widely applied to water supply, water drainage, heat supply, gas supply, long-distance petroleum and natural gas transportation, agricultural irrigation, hydraulic engineering and various industrial devices, the pipeline is easy to generate different degrees of damage deformation after being used for a long time, the efficiency of oil and gas transportation is reduced, the loss is increased due to leakage generated in the transportation process, and meanwhile, serious potential safety hazards are caused, so that the pipeline is necessary to be regularly detected, the integrity and the peripheral safety of the pipeline are guaranteed, the operation management risk of the pipeline is reduced, and the occurrence of operation production accidents is reduced.
In the prior art, a magnetic leakage detection method is often adopted to detect the characteristics, the length and the like of the inner wall and the outer wall of a pipeline and the pipeline, when the magnetic leakage detection method utilizes a ferromagnetic steel pipe to be fully magnetized, magnetic lines of force in the pipe wall are blocked by defects on the surface or the position close to the surface of the ferromagnetic steel pipe, the magnetic lines of force at the defects are distorted, and a part of the magnetic lines of force leaks out of the inner surface and the outer surface of the ferromagnetic steel pipe to form a magnetic leakage field for detection.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an axial magnetic flux leakage detector for a pipeline, which can move in the pipeline with 15% of deformation in a magnetic flux leakage detection device, accurately detect the axial defects in the passing pipeline and effectively identify the defect positions and defect properties of the pipeline.
In order to achieve the purpose, the utility model adopts the technical scheme that: an axial magnetic flux leakage detector for a pipeline comprises a first barrel, a second barrel, a plurality of numerical control boxes arranged on the outer surface of the first barrel, a plurality of first probes arranged on the outer surface of the second barrel and a plurality of first magnetic steels, wherein the first barrel and the second barrel are connected through a chain;
a first front flange and a first rear flange are respectively connected to the front end face and the rear end face of the first cylinder, a first front leather cup is sleeved on the first front flange, a first rear leather cup is sleeved on the first rear flange, and the first front leather cup and the first rear leather cup are in interference fit with the inner wall of the pipeline in the circumferential direction;
a second front flange and a second rear flange are respectively connected to the front end face and the rear end face of the second cylinder, a second front leather cup is sleeved on the second front flange, and a second rear leather cup is sleeved on the second rear flange;
the first rear flange is connected with the second front flange through the chain, a plurality of mileage wheels are mounted on the second rear flange, and the mileage wheels are in contact connection with the inner wall of the pipeline;
first probe further includes parallelogram's elastic support and installs the sensor on the support, elastic support's lower surface mounting has an installation breach on the upper surface of this elastic support on the second barrel, the cladding of the sensor outside has an insulating cover, and this insulating cover embedding in the installation breach and with elastic support's last fixed surface be connected, the insulating cover is connected with a wearing layer on the upper surface, the upper surface of this wearing layer is a little higher than elastic support's upper surface to make wearing layer upper surface closely laminate with the inner wall of pipeline, in four angles of parallelogram elastic support, it has a first fillet groove to open by the acute angle department of forming between going to the bottom and the first side.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the inner surface of the first side edge is further provided with a second fillet groove, and the second fillet groove is close to an obtuse angle formed between the upper bottom and the first side edge.
2. In the scheme, the number of the mileage wheels is 3-6.
3. In the scheme, the first front leather cup, the first rear leather cup, the second front leather cup and the second rear leather cup are all polyurethane leather cups.
4. In the above scheme, batteries are installed in the first cylinder and the second cylinder.
5. In the above scheme, the sensor includes a hall sensor and an eddy current sensor.
6. In the scheme, the wear-resistant layer is a chromium oxide ceramic sheet.
7. In the above scheme, the elastic support is a polyurethane support.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. the axial magnetic flux leakage detector for the pipeline can move in the pipeline with 15% of deformation, accurately detect the axial defects in the passing pipeline, effectively identify the defect positions, defect properties and the like of the pipeline, and provide accurate data guidance for the maintenance of the pipeline.
2. The axial magnetic flux leakage detector for the pipeline is characterized in that the probe structure is arranged, so that the upper surface of the probe and the inner wall of the pipeline to be tested can always keep interference, 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 a sleeve head is ensured; in addition, in four angles of its parallelogram elastic support, open by the acute angle department that forms between lower bottom and the first side has a first fillet groove, the setting in fillet groove, when making elastic support by the extrusion in the pipeline, a buffer has, avoid elastic support when by sharp extrusion, produced stress is too big, too concentrate and lead to support local fracture or surpass yield strength and make the unable condition such as kick-back of support, further guarantee equipment can guarantee still after long-time use closely laminating of probe and pipeline inner wall, guarantee to detect the precision.
Drawings
FIG. 1 is a schematic structural view of an axial flux leakage detector for a pipeline according to the present invention;
FIG. 2 is a cross-sectional view of an axial flux leakage detector for a pipe according to the present invention;
FIG. 3 is a partial structural cross-sectional view of an axial flux leakage detector for a pipe according to the present invention;
FIG. 4 is a schematic structural view of a probe of the axial flux leakage detector for a pipeline according to the present invention.
In the above drawings: 1. a first cylinder; 2. a second cylinder; 3. a numerical control box; 4. a first probe; 5. a first magnetic steel; 6. a chain; 7. a first front flange; 8. a first rear flange; 9. a first front leather cup; 901. a first front platen; 902. a first front bolt; 1001. a first rear platen; 1002. a first rear bolt; 10. a first rear leather cup; 11. a second front flange; 12. a second rear flange; 13. a second front leather cup; 14. a second rear leather cup; 15. a mileage wheel; 16. a magnetic ring; 1a, an elastic bracket; 3a, an insulating sleeve; 4a, a wear-resistant layer; 5a, a first fillet groove; 6a and a second fillet groove.
Detailed Description
In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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 being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus 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: an axial magnetic flux leakage detector for a pipeline comprises a first barrel body 1, a second barrel body 2, a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, a plurality of first probes 4 arranged on the outer surface of the second barrel body 2 and a plurality of first magnetic steels 5, wherein the first barrel body 1 is connected with the second barrel body 2 through a chain 6, the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel body 1, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second barrel body 2, the first probes 4 are electrically connected with the numerical control boxes 3, the plurality of first magnetic steels 5 are averagely divided into two groups, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second barrel body 2, steel magnetic rings are uniformly and densely distributed on each first magnetic steel 5, so as to form two magnetic rings 16, the two magnetic rings 16 are respectively positioned at two sides of a probe ring formed by the first probes 4 arranged along the circumferential direction of the second barrel body 2, a magnetic field is generated by the magnetic block, and magnetic conduction is realized by the steel brush;
a first front flange 7 and a first rear flange 8 are respectively connected to the front end face and the rear end face of the first cylinder 1, a first front leather cup 9 is sleeved on the first front flange 7, a first rear leather cup 10 is sleeved on the first rear flange 8, and the first front leather cup 9 and the first rear leather cup 10 are in interference fit with the inner wall of the pipeline in the circumferential direction;
the first front leather cup 9 is fixedly connected with the first front flange 7 through a first front pressing plate 901, the first rear leather cup 10 is fixedly connected with the first rear flange 8 through a first rear pressing plate 1001, a plurality of first front bolts 902 sequentially penetrate through the first front pressing plate 901, the first front leather cup 9 and the first front flange 7 and are fixedly connected with the front end face of the first cylinder 1, and a plurality of first rear bolts 1002 sequentially penetrate through the first rear pressing plate, the first rear leather cup 1001 10 and the first rear flange 8 and are fixedly connected with the rear end face of the first cylinder 1;
a second front flange 11 and a second rear flange 12 are respectively connected to the front end face and the rear end face of the second cylinder 2, a second front leather cup 13 is sleeved on the second front flange 11, and a second rear leather cup 14 is sleeved on the second rear flange 12;
the first rear flange 8 is connected with the second front flange 11 through the chain 6, the second rear flange 12 is provided with a plurality of mileage wheels 15, and the mileage wheels 15 are in contact connection with the inner wall of the pipeline;
first probe 4 further includes parallelogram's elastic support 1a and installs the sensor on support 1a, elastic support 1 a's lower surface mounting has an installation breach on the second barrel 2, this elastic support 1 a's upper surface, the sensor outside cladding has an insulating cover 3a, this insulating cover 3a embedding in the installation breach and with elastic support 1 a's last fixed surface be connected, be connected with a wearing layer 4a on the insulating cover 3a upper surface, this wearing layer 4 a's upper surface is a little higher than elastic support 1 a's upper surface to make wearing layer 4a upper surface closely laminate with the inner wall of pipeline, among parallelogram elastic support 1 a's four angles, by the acute angle department that forms between the side of going to the bottom with first angle groove 5 a.
The inner surface of the first side is also provided with a second fillet groove 6a, and the second fillet groove 6a is close to an obtuse angle formed between the upper bottom and the first side; the number of the mileage wheels 15 is 3; the first front leather cup 9, the first rear leather cup 10, the second front leather cup 13 and the second rear leather cup 14 are all polyurethane leather cups; batteries are arranged in the first cylinder 1 and the second cylinder 2.
Example 2: an axial magnetic flux leakage detector for a pipeline comprises a first barrel body 1, a second barrel body 2, a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, a plurality of first probes 4 arranged on the outer surface of the second barrel body 2 and a plurality of first magnetic steels 5, wherein the first barrel body 1 is connected with the second barrel body 2 through a chain 6, the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel body 1, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second barrel body 2, the first probes 4 are electrically connected with the numerical control boxes 3, the plurality of first magnetic steels 5 are averagely divided into two groups, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second barrel body 2, steel magnetic rings are uniformly and densely distributed on each first magnetic steel 5, so as to form two magnetic rings 16, the two magnetic rings 16 are respectively positioned at two sides of a probe ring formed by the first probes 4 arranged along the circumferential direction of the second barrel body 2, a magnetic field is generated by the magnetic block, and magnetic conduction is realized by the steel brush;
a first front flange 7 and a first rear flange 8 are respectively connected to the front end face and the rear end face of the first cylinder 1, a first front leather cup 9 is sleeved on the first front flange 7, a first rear leather cup 10 is sleeved on the first rear flange 8, and the first front leather cup 9 and the first rear leather cup 10 are in interference fit with the inner wall of the pipeline in the circumferential direction;
the first front leather cup 9 is fixedly connected with the first front flange 7 through a first front pressing plate 901, the first rear leather cup 10 is fixedly connected with the first rear flange 8 through a first rear pressing plate 1001, a plurality of first front bolts 902 sequentially penetrate through the first front pressing plate 901, the first front leather cup 9 and the first front flange 7 and are fixedly connected with the front end face of the first cylinder 1, and a plurality of first rear bolts 1002 sequentially penetrate through the first rear pressing plate, the first rear leather cup 1001 10 and the first rear flange 8 and are fixedly connected with the rear end face of the first cylinder 1;
a second front flange 11 and a second rear flange 12 are respectively connected to the front end face and the rear end face of the second cylinder 2, a second front leather cup 13 is sleeved on the second front flange 11, and a second rear leather cup 14 is sleeved on the second rear flange 12;
the first rear flange 8 is connected with the second front flange 11 through the chain 6, the second rear flange 12 is provided with a plurality of mileage wheels 15, and the mileage wheels 15 are in contact connection with the inner wall of the pipeline;
first probe 4 further includes parallelogram's elastic support 1a and installs the sensor on support 1a, elastic support 1 a's lower surface mounting has an installation breach on the second barrel 2, this elastic support 1 a's upper surface, the sensor outside cladding has an insulating cover 3a, this insulating cover 3a embedding in the installation breach and with elastic support 1 a's last fixed surface be connected, be connected with a wearing layer 4a on the insulating cover 3a upper surface, this wearing layer 4 a's upper surface is a little higher than elastic support 1 a's upper surface to make wearing layer 4a upper surface closely laminate with the inner wall of pipeline, among parallelogram elastic support 1 a's four angles, by the acute angle department that forms between the side of going to the bottom with first angle groove 5 a.
The number of the mileage wheels 15 is 6; the sensor comprises a Hall sensor and an eddy current sensor, wherein the Hall sensor is used for sensing magnetic fields in three directions, and the eddy current sensor is used for monitoring whether the defects of the pipeline are positioned inside or outside the pipeline; the wear-resistant layer 4a is a chromium oxide ceramic wafer; the elastic support 1a is a polyurethane support.
By adopting the axial magnetic flux leakage detector for the pipeline, the axial magnetic flux leakage detector can move in the pipeline with 15% of deformation, accurately detect the axial defects in the passing pipeline, effectively identify the defect positions, defect properties and the like of the pipeline, and provide accurate data guidance for the maintenance of the pipeline;
in addition, the arrangement of the probe structure can ensure that the upper surface of the probe always keeps interference with the inner wall of the pipeline to be tested, namely the probe always keeps a close fit state with the inner wall of the pipeline, thereby ensuring the detection precision of the sensor in the sleeve head;
further, the setting of fillet groove for when the elastic support was extrudeed in the pipeline, a buffer had, avoided the elastic support when being extruded sharply, produced stress was too big, too concentrate and lead to support local fracture or surpass yield strength and make the unable circumstances such as kick-back of support, further guarantees equipment and still can guarantee the inseparable laminating of probe and pipeline inner wall after long-time the use, guarantees to detect the precision.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to 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 within the protection scope of the present invention.
Claims (8)
1. The utility model provides an axial magnetic leakage detector for pipeline which characterized in that: the magnetic control device comprises a first barrel body (1), a second barrel body (2), a plurality of numerical control boxes (3) arranged on the outer surface of the first barrel body (1), a plurality of first probes (4) and a plurality of first magnetic steels (5) arranged on the outer surface of the second barrel body (2), wherein the first barrel body (1) is connected with the second barrel body (2) through a chain (6), the plurality of numerical control boxes (3) are arranged at equal intervals along the circumferential direction of the first barrel body (1), the plurality of first probes (4) are arranged at equal intervals along the circumferential direction of the second barrel body (2), the first probes (4) are electrically connected with the numerical control boxes (3), the plurality of first magnetic steels (5) are averagely divided into two groups, each group of first magnetic steels (5) are respectively arranged continuously along the circumferential direction of the second barrel body (2), and steel brushes are uniformly and densely distributed on each first magnetic steel (5) to form two magnetic rings (16), the two magnetic rings (16) are respectively positioned at two sides of a probe ring formed by the first probe (4) arranged along the circumferential direction of the second cylinder (2);
a first front flange (7) and a first rear flange (8) are respectively connected to the front end face and the rear end face of the first barrel (1), a first front leather cup (9) is sleeved on the first front flange (7), a first rear leather cup (10) is sleeved on the first rear flange (8), and the first front leather cup (9) and the first rear leather cup (10) are in interference fit with the inner wall of the pipeline in the circumferential direction;
a second front flange (11) and a second rear flange (12) are respectively connected to the front end face and the rear end face of the second barrel (2), a second front leather cup (13) is sleeved on the second front flange (11), and a second rear leather cup (14) is sleeved on the second rear flange (12);
the first rear flange (8) is connected with the second front flange (11) through the chain (6), the second rear flange (12) is provided with a plurality of mileage wheels (15), and the mileage wheels (15) are in contact connection with the inner wall of the pipeline;
the first probe (4) further comprises a parallelogram-shaped elastic bracket (1 a) and a sensor arranged on the bracket (1 a), the lower surface of the elastic support (1 a) is arranged on the second cylinder body (2), the upper surface of the elastic support (1 a) is provided with an installation gap, the outer side of the sensor is coated with an insulating sleeve (3 a), the insulating sleeve (3 a) is embedded into the mounting notch and fixedly connected with the upper surface of the elastic bracket (1 a), the upper surface of the insulating sleeve (3 a) is connected with a wear-resistant layer (4 a), the upper surface of the wear-resistant layer (4 a) is slightly higher than the upper surface of the elastic support (1 a), so that the upper surface of the wear-resistant layer (4 a) is tightly attached to the inner wall of the pipeline, in the four corners of the parallelogram elastic support (1 a), a first round angle groove (5 a) is arranged at an acute angle formed between the lower bottom and the first side edge.
2. The axial flux leakage detector for a pipe of claim 1, wherein: the inner surface of the first side edge is also provided with a second fillet groove (6 a), and the second fillet groove (6 a) is close to an obtuse angle formed between the upper bottom and the first side edge.
3. The axial flux leakage detector for a pipe of claim 1, wherein: the number of the mileage wheels (15) is 3-6.
4. The axial flux leakage detector for a pipe of claim 1, wherein: the first front leather cup (9), the first rear leather cup (10), the second front leather cup (13) and the second rear leather cup (14) are all polyurethane leather cups.
5. The axial flux leakage detector for a pipe of claim 1, wherein: batteries are arranged in the first cylinder (1) and the second cylinder (2).
6. The axial flux leakage detector for a pipe of claim 1, wherein: the sensor comprises a Hall sensor and an eddy current sensor.
7. The axial flux leakage detector for a pipe of claim 1, wherein: the wear-resistant layer (4 a) is a chromium oxide ceramic sheet.
8. The axial flux leakage detector for a pipe of claim 1, wherein: the elastic bracket (1 a) is a polyurethane bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020320279.2U CN215953467U (en) | 2020-03-16 | 2020-03-16 | Axial magnetic flux leakage detector for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020320279.2U CN215953467U (en) | 2020-03-16 | 2020-03-16 | Axial magnetic flux leakage detector for pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN215953467U true CN215953467U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020320279.2U Active CN215953467U (en) | 2020-03-16 | 2020-03-16 | Axial magnetic flux leakage detector for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215953467U (en) |
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2020
- 2020-03-16 CN CN202020320279.2U patent/CN215953467U/en active Active
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