CN215953468U - 360-degree magnetic flux leakage detector for pipeline - Google Patents
360-degree magnetic flux leakage detector for pipeline Download PDFInfo
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- CN215953468U CN215953468U CN202020320280.5U CN202020320280U CN215953468U CN 215953468 U CN215953468 U CN 215953468U CN 202020320280 U CN202020320280 U CN 202020320280U CN 215953468 U CN215953468 U CN 215953468U
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Abstract
The utility model discloses a 360-degree magnetic flux leakage detector for a pipeline, which comprises a first cylinder, a third cylinder, a fourth cylinder and a plurality of numerical control boxes arranged on the outer surface of the first cylinder, wherein front flanges and rear flanges are respectively connected on the front end faces and the rear end faces of the third cylinder and the fourth cylinder, a leather cup is sleeved on each of the front flanges and the rear flanges, a leather cup pressing plate connected with the front flanges and the rear flanges is arranged on the outer side of the leather cup, at least four magnetic stripes formed by closely arranging second magnetic steel along the axial direction are respectively arranged on the outer surfaces of the third cylinder and the fourth cylinder, second steel brushes are densely distributed on the upper surface of each second magnetic steel, and detection strips formed by circumferentially arranging a plurality of second probes are arranged between the adjacent magnetic stripes. The utility model can ensure that the probe always keeps surface contact with the inner wall of the pipeline, namely, the position of the sensor always keeps parallel to the inner surface of the pipeline, thereby further improving the precision of pipeline detection.
Description
Technical Field
The utility model relates to a 360-degree 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 usually adopted to detect the characteristics, the length and the like of the inner wall and the outer wall of the pipeline and the pipeline, when the ferromagnetic steel pipe is fully magnetized, the magnetic force lines in the pipe wall are blocked by the defects on the surface or the position close to the surface of the ferromagnetic steel pipe, the magnetic force lines at the defects are distorted, and part of the magnetic force lines leak 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 a 360-degree magnetic leakage detector for a pipeline, which can ensure that a probe always keeps surface contact with the inner wall of the pipeline in a magnetic leakage detection device, namely, the position of a sensor always keeps parallel to the inner surface of the pipeline, thereby further improving the detection precision of the pipeline.
In order to achieve the purpose, the utility model adopts the technical scheme that: a360-degree magnetic flux leakage detector for a pipeline comprises a first cylinder, a third cylinder, a fourth cylinder and a plurality of numerical control boxes arranged on the outer surface of the first cylinder, wherein the first cylinder, the third cylinder and the fourth cylinder are connected through a chain;
the front end face and the rear end face of the third cylinder and the fourth cylinder are respectively connected with a front flange and a rear flange, each of the front flange and the rear flange is sleeved with a leather cup, the outer side of each leather cup is provided with a leather cup pressing plate connected with the front flange and the rear flange, the outer surfaces of the third cylinder and the fourth cylinder are respectively provided with at least four magnetic stripes formed by second magnetic steel in a close arrangement along the axial direction, the upper surface of each second magnetic steel is densely distributed with second steel brushes, and a detection strip formed by a plurality of second probes in a circumferential arrangement is arranged between the adjacent magnetic stripes;
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;
the first rear flange of the first barrel is connected with the front flange of the third barrel through the chain, the rear flange of the third barrel is connected with the front flange of the fourth barrel through the chain, and the rear flange of the fourth barrel is provided with a plurality of mileage wheels which are in contact connection with the inner wall of the pipeline;
the second probe further comprises a parallelogram elastic support and a sensor arranged on the support, the lower surface of the elastic support is correspondingly arranged on the third cylinder and the fourth cylinder, an installation gap is formed in the upper surface of the elastic support, an insulating sleeve is coated on the outer side of the sensor, the insulating sleeve is embedded into the installation gap and is fixedly connected with the upper surface of the elastic support, a wear-resistant layer is connected to the upper surface of the insulating sleeve, and the upper surface of the wear-resistant layer is slightly higher than the upper surface of the elastic support, so that the upper surface of the wear-resistant layer is tightly attached to the inner wall of the pipeline;
in four corners of the parallelogram elastic support, a first fillet groove is formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove is formed on the outer surface of the second side edge of the parallelogram elastic support, and the third fillet groove is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support.
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 above scheme, the sensor includes a hall sensor and an eddy current sensor.
3. In the above scheme, the number of the magnetic strips on the third cylinder and the fourth cylinder is respectively 4.
4. In the above scheme, the third cylinder and the fourth cylinder are arranged in a staggered manner in the circumferential direction, so that a connecting line between the circumferential midpoint of any one detection strip on the third cylinder and the circumferential midpoint of one magnetic strip on the fourth cylinder is parallel to the axes of the third cylinder and the fourth cylinder.
5. In the above scheme, a plurality of second adapter boxes are respectively installed on the respective leather cup pressing plates of the third cylinder and the fourth cylinder, and the second adapter boxes are respectively and electrically connected with the respective second probes and the numerical control box.
6. In the above scheme, the number ratio of the respective second adapter boxes of the third cylinder and the fourth cylinder to the respective second probes is 1: 5-10, so that each second adapter box is electrically connected with 5-10 second probes.
7. In the above scheme, battery sections are arranged in the first barrel, the third barrel and the fourth barrel.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. the 360-degree magnetic flux leakage detector for the pipeline can move in the pipeline with 15% of deformation, accurately detect the defects in the 360-degree range of the passing pipeline in the circumferential direction, 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 360-degree 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; furthermore, a first round angle groove is formed in an acute angle formed between the lower bottom and the first side edge in four corners of the parallelogram elastic support, and the arrangement of the round angle groove enables the elastic support to have a buffer area when being extruded in a pipeline, so that the situations that the support cannot rebound due to local fracture or over yield strength caused by overlarge and over-concentrated stress generated when the elastic support is rapidly extruded are avoided, the close fit of the probe and the inner wall of the pipeline can be further ensured after the equipment is used for a long time, and the detection precision is ensured; furthermore, a third fillet groove is formed in the outer surface of the second side edge of the parallelogram elastic support, the third fillet groove is close to an obtuse angle formed between the upper bottom of the parallelogram elastic support and the second side edge, and the third fillet groove is arranged, so that the elastic support has a self-adaptive adjusting space in the extruding process, the probe is guaranteed to be in surface contact with the inner wall of the pipeline all the time, the position of the sensor is kept parallel to the inner surface of the pipeline all the time, and the detection precision of the pipeline is further improved.
Drawings
FIG. 1 is a structural cross-sectional view of a 360 degree magnetic flux leakage detector for a pipeline according to the present invention;
FIG. 2 is a schematic structural view of a probe of the 360-degree magnetic flux leakage detector for the pipeline according to the present invention;
FIG. 3 is a schematic view of a partial structure of a 360 degree magnetic flux leakage detector for a pipe according to the present invention;
FIG. 4 is a partial structural cross-sectional view of a 360 degree flux leakage detector for a pipe in accordance with the present invention;
FIG. 5 is a magnetic steel distribution diagram of the 360 degree magnetic flux leakage detector for a pipe of the present invention.
In the above drawings: 1. a first cylinder; 3. a numerical control box; 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; 15. a mileage wheel; 1a, an elastic bracket; 3a, an insulating sleeve; 4a, a wear-resistant layer; 5a, a first fillet groove; 6a, a second fillet groove; 7a, a third fillet groove; 1b, a third cylinder; 2b, a fourth cylinder; 3b, a front flange; 4b, a rear flange; 5b, a leather cup; 6b, pressing a leather cup plate; 7b, second magnetic steel; 8b, a magnetic strip; 9b, a second steel brush; 10b, a second probe; 11b, a detection strip; 14b, a battery section; 15b and a second junction box.
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: a360-degree magnetic flux leakage detector for a pipeline comprises a first barrel 1, a third barrel 1b, a fourth barrel 2b and a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel 1, wherein the first barrel 1, the third barrel 1b and the fourth barrel 2b are connected through a chain 6;
the front end face and the rear end face of the third cylinder body 1b and the fourth cylinder body 2b are respectively connected with a front flange 3b and a rear flange 4b, each of the front flange 3b and the rear flange 4b is sleeved with a leather cup 5b, a leather cup pressing plate 6b connected with the front flange 3b and the rear flange 4b is arranged outside the leather cup 5b, the outer surfaces of the third cylinder body 1b and the fourth cylinder body 2b are respectively provided with at least four magnetic stripes 8b formed by second magnetic steel 7b in close arrangement along the axial direction, the upper surface of each second magnetic steel 7b is densely distributed with second steel brushes 9b, detection strips formed by a plurality of second probes 10b in close arrangement along the circumferential direction are arranged between the adjacent magnetic stripes 8b, a magnetic field is generated by the magnetic steel, and magnetic conduction is realized by the steel brushes;
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;
the first rear flange 8 of the first cylinder 1 is connected with the front flange 3b of the third cylinder 1b, the rear flange 4b of the third cylinder 1b is connected with the front flange 3b of the fourth cylinder 2b through the chain 6, the rear flange 4b of the fourth cylinder 2b 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 second probe 10b further comprises a parallelogram-shaped elastic support 1a and a sensor arranged on the support 1a, the lower surface of the elastic support 1a is correspondingly arranged on the third cylinder 1b and the fourth cylinder 2b, an installation gap is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a is coated outside the sensor, the insulating sleeve 3a is embedded into the installation gap and fixedly connected with the upper surface of the elastic support 1a, a wear-resistant layer 4a is connected to the upper surface of the insulating sleeve 3a, and the upper surface of the wear-resistant layer 4a is slightly higher than the upper surface of the elastic support 1a, so that the upper surface of the wear-resistant layer 4a is tightly attached to the inner wall of the pipeline;
in four corners of the parallelogram elastic support 1a, a first fillet groove 5a is arranged at an acute angle formed between the lower bottom and the first side edge, a third fillet groove 7a is arranged on the outer surface of the second side edge of the parallelogram elastic support 1a, and the third fillet groove 7a is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support 1 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 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;
a plurality of second adapter boxes 15b are respectively arranged on the leather cup pressing plates 6b of the third cylinder 1b and the fourth cylinder 2b, and the second adapter boxes 15b are respectively and electrically connected with the second probes 10b and the numerical control box 3; the number ratio of the second adapter 15b of each of the third cylinder 1b and the fourth cylinder 2b to the second probe 10b is 1: 10, so that each second adaptor box 15b is electrically connected with 10 second probes 10 b; the number of the plurality of mileage wheels 15 is 6.
Example 2: a360-degree magnetic flux leakage detector for a pipeline comprises a first barrel 1, a third barrel 1b, a fourth barrel 2b and a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel 1, wherein the first barrel 1, the third barrel 1b and the fourth barrel 2b are connected through a chain 6;
the front end face and the rear end face of the third cylinder body 1b and the fourth cylinder body 2b are respectively connected with a front flange 3b and a rear flange 4b, each of the front flange 3b and the rear flange 4b is sleeved with a leather cup 5b, a leather cup pressing plate 6b connected with the front flange 3b and the rear flange 4b is arranged outside the leather cup 5b, the outer surfaces of the third cylinder body 1b and the fourth cylinder body 2b are respectively provided with at least four magnetic stripes 8b formed by second magnetic steel 7b in close arrangement along the axial direction, the upper surface of each second magnetic steel 7b is densely distributed with second steel brushes 9b, detection strips formed by a plurality of second probes 10b in close arrangement along the circumferential direction are arranged between the adjacent magnetic stripes 8b, a magnetic field is generated by the magnetic steel, and magnetic conduction is realized by the steel brushes;
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;
the first rear flange 8 of the first cylinder 1 is connected with the front flange 3b of the third cylinder 1b, the rear flange 4b of the third cylinder 1b is connected with the front flange 3b of the fourth cylinder 2b through the chain 6, the rear flange 4b of the fourth cylinder 2b 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 second probe 10b further comprises a parallelogram-shaped elastic support 1a and a sensor arranged on the support 1a, the lower surface of the elastic support 1a is correspondingly arranged on the third cylinder 1b and the fourth cylinder 2b, an installation gap is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a is coated outside the sensor, the insulating sleeve 3a is embedded into the installation gap and fixedly connected with the upper surface of the elastic support 1a, a wear-resistant layer 4a is connected to the upper surface of the insulating sleeve 3a, and the upper surface of the wear-resistant layer 4a is slightly higher than the upper surface of the elastic support 1a, so that the upper surface of the wear-resistant layer 4a is tightly attached to the inner wall of the pipeline;
in four corners of the parallelogram elastic support 1a, a first fillet groove 5a is arranged at an acute angle formed between the lower bottom and the first side edge, a third fillet groove 7a is arranged on the outer surface of the second side edge of the parallelogram elastic support 1a, and the third fillet groove 7a is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support 1 a.
The number of the magnetic strips 8b on the third cylinder 1b and the fourth cylinder 2b is respectively 4; the third cylinder body 1b and the fourth cylinder body 2b are arranged in a staggered mode in the circumferential direction, so that a connecting line of the circumferential middle point of any detection strip on the third cylinder body 1b and the circumferential middle point of one magnetic strip 8b on the fourth cylinder body 2b is parallel to the axial lines of the third cylinder body 1b and the fourth cylinder body 2b, second magnetic steel and second probes are uniformly distributed in the circumferential direction of 360 degrees, and 360-degree omnibearing detection on the pipe wall is achieved;
a plurality of second adapter boxes 15b are respectively arranged on the leather cup pressing plates 6b of the third cylinder 1b and the fourth cylinder 2b, and the second adapter boxes 15b are respectively and electrically connected with the second probes 10b and the numerical control box 3; the number ratio of the second adapter 15b of each of the third cylinder 1b and the fourth cylinder 2b to the second probe 10b is 1: 5, electrically connecting each second adapter box 15b with 5 second probes 10 b;
the first cylinder 1, the third cylinder 1b and the fourth cylinder 2b are all internally provided with a battery section 14 b; the number of the mileage wheels 15 is 3; the first front leather cup 9, the first rear leather cup 10 and the leather cup 5b are all polyurethane leather cups.
By adopting the 360-degree magnetic flux leakage detector for the pipeline, the detector can move in the pipeline with 15% of deformation, accurately detect the defects in the 360-degree range of the passing pipeline in the circumferential direction, 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;
furthermore, due to the arrangement of the fillet groove, the elastic support is provided with a buffer area when being extruded in the pipeline, the situations that the elastic support cannot rebound due to local fracture or over yield strength caused by overlarge and over-concentrated stress generated when being rapidly extruded are avoided, the close fit of the probe and the inner wall of the pipeline can be further ensured after the equipment is used for a long time, and the detection precision is ensured;
furthermore, the third fillet groove is arranged, so that the elastic support has a self-adaptive adjusting space in the extrusion process, the probe is always kept in surface contact with the inner wall of the pipeline, the position of the sensor is always kept parallel to the inner surface of the pipeline, and the pipeline detection precision is further improved.
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 a 360 magnetic leakage detector for pipeline which characterized in that: the device comprises a first cylinder (1), a third cylinder (1 b), a fourth cylinder (2 b) and a plurality of numerical control boxes (3) arranged on the outer surface of the first cylinder (1), wherein the first cylinder (1), the third cylinder (1 b) and the fourth cylinder (2 b) are connected through a chain (6);
the front end face and the rear end face of the third cylinder body (1 b) and the rear end face of the fourth cylinder body (2 b) are respectively connected with a front flange (3 b) and a rear flange (4 b), each front flange (3 b) and each rear flange (4 b) are sleeved with a leather cup (5 b), the outer side of each leather cup (5 b) is provided with a leather cup pressing plate (6 b) connected with the front flange (3 b) and the rear flange (4 b), the outer surfaces of the third cylinder body (1 b) and the fourth cylinder body (2 b) are respectively provided with at least four magnetic stripes (8 b) formed by closely arranging second magnetic steels (7 b) along the axial direction, the upper surface of each second magnetic steel (7 b) is densely distributed with second steel brushes (9 b), and detection strips formed by arranging a plurality of second probes (10 b) along the circumferential direction are arranged between the adjacent magnetic stripes (8 b);
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;
the first rear flange (8) of the first barrel (1) is connected with the front flange (3 b) of the third barrel (1 b), the rear flange (4 b) of the third barrel (1 b) is connected with the front flange (3 b) of the fourth barrel (2 b) through the chain (6), the rear flange (4 b) of the fourth barrel (2 b) 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 second probe (10 b) further comprises a parallelogram-shaped elastic support (1 a) and a sensor arranged on the support (1 a), the lower surface of the elastic support (1 a) is correspondingly arranged on the third cylinder (1 b) and the fourth cylinder (2 b), 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 installation gap and fixedly connected with the upper surface of the elastic support (1 a), the upper surface of the insulating sleeve (3 a) is connected with a wear-resistant layer (4 a), and 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 four corners of the parallelogram elastic support (1 a), a first fillet groove (5 a) is formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove (7 a) is formed on the outer surface of the second side edge of the parallelogram elastic support (1 a), and the third fillet groove (7 a) is close to an obtuse angle formed between the upper bottom and the second side edge of the parallelogram elastic support (1 a).
2. The 360 ° 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 360 ° flux leakage detector for a pipe of claim 1, wherein: the sensor comprises a Hall sensor and an eddy current sensor.
4. The 360 ° flux leakage detector for a pipe of claim 1, wherein: the number of the magnetic strips (8 b) on the third cylinder (1 b) and the fourth cylinder (2 b) is respectively 4.
5. The 360 ° flux leakage detector for a pipe of claim 1, wherein: the third cylinder body (1 b) and the fourth cylinder body (2 b) are arranged in a staggered mode in the circumferential direction, so that a connecting line of the circumferential midpoint of any detection strip on the third cylinder body (1 b) and the circumferential midpoint of one magnetic strip (8 b) on the fourth cylinder body (2 b) is parallel to the axial lines of the third cylinder body (1 b) and the fourth cylinder body (2 b).
6. The 360 ° flux leakage detector for a pipe of claim 1, wherein: a plurality of second adapter boxes (15 b) are respectively arranged on the leather cup pressing plates (6 b) of the third cylinder body (1 b) and the fourth cylinder body (2 b), and the second adapter boxes (15 b) are respectively and electrically connected with the second probes (10 b) and the numerical control box (3).
7. The 360 ° flux leakage detector for a pipe of claim 6, wherein: the number ratio of the second adapter boxes (15 b) of the third cylinder (1 b) to the fourth cylinder (2 b) to the second probes (10 b) is 1: 5-10, so that each second adapter box (15 b) is electrically connected with 5-10 second probes (10 b).
8. The 360 ° flux leakage detector for a pipe of claim 1, wherein: and battery sections (14 b) are arranged in the first barrel (1), the third barrel (1 b) and the fourth barrel (2 b).
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| CN202020320280.5U CN215953468U (en) | 2020-03-16 | 2020-03-16 | 360-degree magnetic flux leakage detector for pipeline |
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| CN202020320280.5U CN215953468U (en) | 2020-03-16 | 2020-03-16 | 360-degree magnetic flux leakage detector for pipeline |
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