CN215953466U - Circumferential magnetic flux leakage detector for pipeline - Google Patents
Circumferential magnetic flux leakage detector for pipeline Download PDFInfo
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- CN215953466U CN215953466U CN202020320227.5U CN202020320227U CN215953466U CN 215953466 U CN215953466 U CN 215953466U CN 202020320227 U CN202020320227 U CN 202020320227U CN 215953466 U CN215953466 U CN 215953466U
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Abstract
The utility model discloses a circumferential magnetic flux leakage detector for a pipeline, which comprises a first cylinder, a third cylinder and a plurality of numerical control boxes arranged on the outer surface of the first cylinder, wherein the first cylinder and the third cylinder are connected through a chain, at least four magnetic stripes formed by second magnetic steels in close arrangement along the axial direction are arranged on the outer surface of the third cylinder, second steel brushes are densely distributed on the upper surface of each second magnetic steel, detection strips formed by a plurality of second probes in circumferential arrangement are arranged between the adjacent magnetic stripes, the second probes further comprise parallelogram elastic supports and sensors arranged on the supports, and first circular angle grooves are formed in the acute angles formed between the lower bottom and the first side edges in the four corners of the parallelogram elastic supports. The utility model can ensure that the probe can still be tightly attached to the inner wall of the pipeline after the equipment is used for a long time, and the detection precision is ensured.
Description
Technical Field
The utility model relates to a circumferential 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 a circumferential magnetic flux leakage detector for a pipeline, which can ensure that a probe can be still tightly attached to the inner wall of the pipeline after equipment is used for a long time by a magnetic flux leakage detection device, and the detection precision is ensured.
In order to achieve the purpose, the utility model adopts the technical scheme that: a circumferential magnetic flux leakage detector for a pipeline comprises a first cylinder, a third cylinder and a plurality of numerical control boxes arranged on the outer surface of the first cylinder, wherein the first cylinder and the third cylinder are connected through a chain;
the front end face and the rear end face of the third cylinder are respectively connected with a front flange and a rear flange, leather cups are sleeved on the front flange and the rear flange, leather cup pressing plates connected with the front flange and the rear flange are arranged on the outer sides of the leather cups, at least four magnetic stripes formed by second magnetic steels in close arrangement along the axial direction are arranged on the outer surface of the third cylinder, second steel brushes are densely distributed on the upper surface of each second magnetic steel, detection strips formed by a plurality of second probes in circumferential arrangement are arranged between every two adjacent magnetic stripes, a plurality of third magnetic steels are respectively arranged on two sides of each detection strip and between every two adjacent magnetic stripes, and third steel brushes are densely distributed on the outer surfaces of the third magnetic steels;
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 provided with a plurality of mileage wheels, and the mileage wheels are in contact connection with the inner wall of the pipeline;
the chain is formed by connecting at least two metal rings, a first mounting head is arranged on a first rear flange connected with the first cylinder, a second mounting head is arranged on a front flange connected with the third cylinder, the first mounting head and the second mounting head are respectively connected with the metal rings at two ends of the chain, the metal ring at one end of the chain is embedded into the first mounting head and is connected with the first mounting head through a first pin, and the metal ring at the other end of the chain is embedded into the second mounting head and is connected with the second mounting head through a second pin;
the second probe further comprises a parallelogram elastic support and a sensor arranged on the support, the lower surface of the elastic support is arranged on the third barrel, an installation notch is formed in the upper surface of the elastic support, an insulating sleeve is wrapped outside the sensor and embedded in the installation notch and fixedly connected with the upper surface of the elastic support, a wear-resistant layer is connected to the upper surface of the insulating sleeve, 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, and a first round groove is formed in each of four corners of the parallelogram elastic support by an acute angle formed between the lower bottom and the first side.
The further improved scheme in the technical scheme is as follows:
1. in the scheme, the chain is coated with a flexible sleeve.
2. In the above scheme, the flexible sleeve is a cylindrical polyurethane sleeve.
3. In the scheme, the number of the metal rings is 3-6.
4. In the above scheme, two ends of the flexible sleeve are respectively embedded into the first mounting head and the second mounting head.
5. 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.
6. In the above scheme, the sensor includes a hall sensor and an eddy current sensor.
7. In the scheme, the leather cup pressing plate of the third barrel is provided with a plurality of second adapter boxes, and the second adapter boxes are respectively and electrically connected with the second probe and the numerical control box.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. the circumferential magnetic flux leakage detector for the pipeline can move in the pipeline with 15% of deformation, accurately detect circumferential defects in the passing pipeline, effectively identify the positions, the properties and the like of the defects of the pipeline, and provide accurate data guidance for the maintenance of the pipeline.
2. The circumferential magnetic flux leakage detector for the pipeline is provided with the probe structure, 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; further, in four angles of its parallelogram elastic support, acute angle department by forming between going to the bottom and the first side opens there is a first fillet groove, the setting in fillet groove, make elastic support when being extrudeed in the pipeline, a buffer has, avoid elastic support when being extruded by sharply, produced stress is 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 guarantee equipment still can guarantee the inseparable laminating of probe and pipe inner wall after long-time the use, guarantee to detect the precision.
3. According to the circumferential magnetic flux leakage detector for the pipeline, the plurality of third magnetic steels are respectively arranged on two sides of the detection strip and between the adjacent magnetic stripes, the third steel brushes are densely distributed on the outer surfaces of the third magnetic steels, and the arrangement of the third magnetic steels ensures the uniformity of magnetic field distribution in the circumferential direction, so that the situation that the magnetic field sensed by the middle probe is far larger than the magnetic fields sensed by the probes on the two sides in the plurality of probes forming the detection strip is avoided, the situation that the test values of the two adjacent probes for the same defect are too large to be accepted is avoided, and the test precision is further improved; 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 always keep a tight fit state, and the detection precision of the sensor in the sleeve head is ensured.
4. The circumferential magnetic flux leakage detector for the pipeline is characterized in that two cylinders are connected through a chain, so that the connection of the cylinders is realized, the conduction of driving force between the cylinders is facilitated, and a larger bending space is provided, so that the device can smoothly pass through a bend and still keep the mutual pulling force when passing through the bend.
Drawings
FIG. 1 is a structural cross-sectional view of a circumferential magnetic flux leakage detector for a pipeline according to the present invention;
FIG. 2 is a schematic view of a local structure of a chain of the circumferential magnetic flux leakage detector for a pipeline according to the present invention;
FIG. 3 is a sectional view of a chain partial structure of the circumferential magnetic flux leakage detector for a pipe according to the present invention;
FIG. 4 is a schematic structural view of a probe of the circumferential magnetic flux leakage detector for a pipeline according to the present invention;
FIG. 5 is a schematic view of a partial structure of the circumferential magnetic flux leakage detector for a pipe according to the present invention;
FIG. 6 is a partial structural cross-sectional view of the circumferential flux leakage detector for a pipe according to the present invention;
FIG. 7 is a magnetic steel distribution diagram of the circumferential flux leakage detector for a pipe according to 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; 351. a metal ring; 36. a first mounting head; 37. a second mounting head; 39. a second pin; 1a, an elastic bracket; 3a, an insulating sleeve; 4a, a wear-resistant layer; 5a, a first fillet groove; 6a, a second fillet groove; 1b, a third 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; 12b, third magnetic steel; 13b, a third steel brush; 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: a circumferential magnetic flux leakage detector for a pipeline comprises a first barrel body 1, a third barrel body 1b and a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, wherein the first barrel body 1 and the third barrel body 1b are connected through a chain 6;
the front end surface and the rear end surface of the third cylinder body 1b are respectively connected with a front flange 3b and a rear flange 4b, the front flange 3b and the rear flange 4b are respectively sleeved with a leather cup 5b, the outer side of the leather cup 5b is provided with a leather cup pressing plate 6b connected with the front flange 3b and the rear flange 4b, the outer surface of the third cylinder body 1b is provided with at least four magnetic strips 8b formed by second magnetic steels 7b which are closely arranged along the axial direction, the upper surface of each second magnetic steel 7b is densely distributed with second steel brushes 9b, a detection strip formed by a plurality of second probes 10b which are arranged along the circumferential direction is arranged between every two adjacent magnetic strips 8b, a magnetic field is generated by the magnetic steel, the magnetic steel is conducted by the steel brush, a plurality of third magnetic steels 12b are respectively arranged on two sides of the detection strip and between the adjacent magnetic strips 8b, and third steel brushes 13b are densely distributed on the outer surfaces of the third magnetic steels 12 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 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 barrel 1 is connected with the front flange 3b of the third barrel 1b through the chain 6, the rear flange 4b of the third barrel 1b 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 chain 6 is formed by connecting at least two metal rings 351, a first mounting head 36 is arranged on a first rear flange 8 connected with the first barrel 1, a second mounting head 37 is arranged on a front flange 3b connected with the third barrel 1b, the first mounting head 36 and the second mounting head 37 are respectively connected with the metal rings 351 at two ends of the chain 6, the metal ring 351 at one end of the chain 6 is embedded in the first mounting head 36 and is connected with the first mounting head 36 through a first pin, and the metal ring 351 at the other end of the chain 6 is embedded in the second mounting head 37 and is connected with the second mounting head 37 through a second pin 39;
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 arranged on the third cylinder 1b, an installation gap is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a wraps the outer side of 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, and a first round-angle groove 5a is formed in an acute angle formed between the lower bottom and the first side edge in four corners of the parallelogram-shaped elastic support 1 a.
The chain 6 is covered with a flexible sleeve; the flexible sleeve is a cylindrical polyurethane sleeve; the number of the metal rings 351 is 3; the two ends of the flexible sleeve are respectively embedded into the first mounting head 36 and the second mounting head 37; 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; the number of the plurality of mileage wheels 15 is 3.
Example 2: a circumferential magnetic flux leakage detector for a pipeline comprises a first barrel body 1, a third barrel body 1b and a plurality of numerical control boxes 3 arranged on the outer surface of the first barrel body 1, wherein the first barrel body 1 and the third barrel body 1b are connected through a chain 6;
the front end surface and the rear end surface of the third cylinder body 1b are respectively connected with a front flange 3b and a rear flange 4b, the front flange 3b and the rear flange 4b are respectively sleeved with a leather cup 5b, the outer side of the leather cup 5b is provided with a leather cup pressing plate 6b connected with the front flange 3b and the rear flange 4b, the outer surface of the third cylinder body 1b is provided with at least four magnetic strips 8b formed by second magnetic steels 7b which are closely arranged along the axial direction, the upper surface of each second magnetic steel 7b is densely distributed with second steel brushes 9b, a detection strip formed by a plurality of second probes 10b which are arranged along the circumferential direction is arranged between every two adjacent magnetic strips 8b, a magnetic field is generated by the magnetic steel, the magnetic steel is conducted by the steel brush, a plurality of third magnetic steels 12b are respectively arranged on two sides of the detection strip and between the adjacent magnetic strips 8b, and third steel brushes 13b are densely distributed on the outer surfaces of the third magnetic steels 12 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 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 barrel 1 is connected with the front flange 3b of the third barrel 1b through the chain 6, the rear flange 4b of the third barrel 1b 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 chain 6 is formed by connecting at least two metal rings 351, a first mounting head 36 is arranged on a first rear flange 8 connected with the first barrel 1, a second mounting head 37 is arranged on a front flange 3b connected with the third barrel 1b, the first mounting head 36 and the second mounting head 37 are respectively connected with the metal rings 351 at two ends of the chain 6, the metal ring 351 at one end of the chain 6 is embedded in the first mounting head 36 and is connected with the first mounting head 36 through a first pin, and the metal ring 351 at the other end of the chain 6 is embedded in the second mounting head 37 and is connected with the second mounting head 37 through a second pin 39;
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 arranged on the third cylinder 1b, an installation gap is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a wraps the outer side of 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, and a first round-angle groove 5a is formed in an acute angle formed between the lower bottom and the first side edge in four corners of the parallelogram-shaped elastic support 1 a.
The number of the metal rings 351 is 5; a plurality of second adapter boxes 15b are arranged on the leather cup pressing plate 6b of the third cylinder 1b, and the second adapter boxes 15b are respectively and electrically connected with the second probe 10b and the numerical control box 3; the first cylinder 1 and the third cylinder 1b are internally provided with battery sections;
the number of the mileage wheels 15 is 6; the first front leather cup 9, the first rear leather cup 10 and the leather cup 5b are all polyurethane leather cups; the wear-resistant layer 4a is a chromium oxide ceramic wafer; the elastic support 1a is a polyurethane support.
By adopting the circumferential magnetic flux leakage detector for the pipeline, the detector can move in the pipeline with 15% of deformation, accurately detect circumferential 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;
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;
in addition, the third magnetic steel ensures the uniformity of magnetic field distribution in the circumferential direction, and avoids the situation that the magnetic field sensed by the middle probe is far larger than the magnetic fields sensed by the probes at the two sides in a plurality of probes forming the detection strip, so that the situation that the test values of two adjacent probes for the same defect are too large to be rejected is avoided, and the test precision is further improved; 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;
in addition, the two cylinders are connected through the chains, so that the connection of the cylinders is realized, the conduction of driving force between the cylinders is facilitated, and a larger bending space is provided, so that the device can smoothly pass through a bend and still keep the pulling force between the cylinders when passing through the bend.
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 circumference magnetic leakage detector for pipeline which characterized in that: the numerical control machine comprises a first cylinder (1), a third cylinder (1 b) and a plurality of numerical control boxes (3) arranged on the outer surface of the first cylinder (1), wherein the first cylinder (1) and the third cylinder (1 b) are connected through a chain (6);
the front end face and the rear end face of the third cylinder body (1 b) are respectively connected with a front flange (3 b) and a rear flange (4 b), the front flange (3 b) and the rear flange (4 b) are sleeved with a leather cup (5 b), the outer side of the 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 surface of the third cylinder body (1 b) is 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), a detection strip formed by arranging a plurality of second probes (10 b) along the circumferential direction is arranged between every two adjacent magnetic stripes (8 b), a plurality of third magnetic steels (12 b) are respectively arranged on two sides of the detection strip and between every two adjacent magnetic stripes (8 b), the outer surface of the third magnetic steel (12 b) is densely provided with third steel brushes (13 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) through the chain (6), the rear flange (4 b) of the third barrel (1 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 chain (6) is formed by connecting at least two metal rings (351), a first mounting head (36) is arranged on a first rear flange (8) connected with the first barrel body (1), a second mounting head (37) is arranged on a front flange (3 b) connected with the third barrel body (1 b), the first mounting head (36) and the second mounting head (37) are respectively connected with the metal rings (351) at two ends of the chain (6), the metal ring (351) at one end of the chain (6) is embedded into the first mounting head (36) and is connected with the first mounting head (36) through a first pin, and the metal ring (351) at the other end of the chain (6) is embedded into the second mounting head (37) and is connected with the second mounting head (37) through a second pin (39);
the second probe (10 b) further comprises a parallelogram-shaped elastic support (1 a) and a sensor mounted on the support (1 a), the lower surface of the elastic bracket (1 a) is arranged on the third cylinder (1 b), the upper surface of the elastic bracket (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 circumferential magnetic flux leakage detector for a pipe according to claim 1, characterized in that: the chain (6) is covered with a flexible sleeve.
3. The circumferential magnetic flux leakage detector for a pipe according to claim 2, characterized in that: the flexible sleeve is a cylindrical polyurethane sleeve.
4. A circumferential magnetic flux leakage detector for a pipeline according to any one of claims 1 to 3, wherein: the number of the metal rings (351) is 3-6.
5. The circumferential magnetic flux leakage detector for a pipe according to claim 2 or 3, characterized in that: the two ends of the flexible sleeve are respectively embedded into the first mounting head (36) and the second mounting head (37).
6. The circumferential magnetic flux leakage detector for a pipe according to claim 1, characterized in that: 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.
7. The circumferential magnetic flux leakage detector for a pipe according to claim 1, characterized in that: the sensor comprises a Hall sensor and an eddy current sensor.
8. The circumferential magnetic flux leakage detector for a pipe according to claim 1, characterized in that: a plurality of second adapter boxes (15 b) are mounted on the leather cup pressing plate (6 b) of the third barrel (1 b), and the second adapter boxes (15 b) are electrically connected with the second probe (10 b) and the numerical control box (3) respectively.
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| CN202020320227.5U CN215953466U (en) | 2020-03-16 | 2020-03-16 | Circumferential magnetic flux leakage detector for pipeline |
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| CN202020320227.5U CN215953466U (en) | 2020-03-16 | 2020-03-16 | Circumferential magnetic flux leakage detector for pipeline |
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