CN112903810A - Omnibearing pipeline magnetic leakage detector - Google Patents
Omnibearing pipeline magnetic leakage detector Download PDFInfo
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- CN112903810A CN112903810A CN202010179791.4A CN202010179791A CN112903810A CN 112903810 A CN112903810 A CN 112903810A CN 202010179791 A CN202010179791 A CN 202010179791A CN 112903810 A CN112903810 A CN 112903810A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 126
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
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- 239000010985 leather Substances 0.000 claims description 73
- 238000003825 pressing Methods 0.000 claims description 44
- 230000001154 acute effect Effects 0.000 claims description 5
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- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 13
- 239000007789 gas Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
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- 238000004880 explosion Methods 0.000 description 1
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- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/87—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using probes
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
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Abstract
The invention discloses an omnibearing pipeline magnetic flux leakage detector which comprises a first cylinder, a second cylinder, a third cylinder, a fourth cylinder and a plurality of numerical control boxes arranged on the outer surface of the first cylinder, wherein a plurality of first probes and a plurality of first magnetic steels are arranged on the outer surface of the second cylinder, the plurality of first probes are arranged at equal intervals along the circumferential direction of the second cylinder, the front end face and the rear end face of the third cylinder and the rear end face of the fourth cylinder are respectively connected with a front flange and a rear flange, and the outer surfaces of the third cylinder and the fourth cylinder are respectively provided with at least four magnetic stripes formed by the second magnetic steels which are tightly arranged along the axial direction. The invention can ensure the contact pressure between the wheel body and the inner wall of the pipeline, so that the wheel body is always kept in a proper force to be attached to the inner wall of the pipeline, thereby not only ensuring the accurate detection of the advancing mileage of the device in the pipeline, but also reducing the friction damage generated by the contact of the wheel body and the pipe wall and prolonging the service life of the mileage wheel.
Description
Technical Field
The invention relates to an omnibearing pipeline magnetic flux leakage detector, belonging to the technical field of pipeline detection.
Background
The pipeline is the important facility of transportation liquid and gas, by the wide application in feedwater, drainage, heat supply, supply gas, long distance transport oil and natural gas, agricultural irrigation, among hydraulic engineering and various industrial installation, the pipeline produces damage deformation of different degree after long-time the use easily, lead to the efficiency of oil gas transportation to reduce, produce in the transportation and reveal and lead to the loss increase, also caused serious potential safety hazard simultaneously, consequently necessary to carry out periodic detection to the pipeline, guarantee the intact and peripheral safety of pipeline, reduce pipeline operation management risk, reduce the emergence of operation production accident.
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.
Disclosure of Invention
The invention aims to provide an omnibearing pipeline magnetic leakage detector which can ensure the contact pressure between a wheel body and the inner wall of a pipeline in a magnetic leakage detection device, so that the wheel body is always kept in proper force to be attached to the inner wall of the pipeline, the accurate detection of the advancing mileage of the device in the pipeline is ensured, the friction damage caused by the contact of the wheel body and the pipe wall is reduced, and the service life of a mileage wheel is prolonged.
In order to achieve the purpose, the invention adopts the technical scheme that: an omnibearing pipeline magnetic flux leakage detector comprises a first barrel, a second barrel, a third barrel, a fourth barrel and a plurality of numerical control boxes arranged on the outer surface of the first barrel, wherein the first barrel, the second barrel, the third barrel and the fourth barrel are connected through a chain in sequence, and the plurality of numerical control boxes are arranged at equal intervals along the circumferential direction of the first barrel;
the outer surface of the second cylinder body is provided with a plurality of first probes and a plurality of first magnetic steels, the plurality of first probes are arranged at equal intervals along the circumferential direction of the second cylinder body, the first probes are electrically connected with the numerical control box, the plurality of first magnetic steels are divided into two groups on average, each group of first magnetic steels are respectively and continuously arranged along the circumferential direction of the second cylinder body, steel brushes are uniformly and densely distributed on each first magnetic steel, so that two magnetic rings are formed, the two magnetic rings are respectively positioned at two sides of a probe ring formed by the first probes arranged along the circumferential direction of the second cylinder body, two sides of each magnetic ring are respectively provided with a steel brush pressing plate, and the opposite surfaces of the steel brush pressing plates at two sides of each magnetic ring are in contact connection with the steel brushes on the magnetic;
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 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, a leather cup pressing plate connected with the front flange and the rear flange is arranged on the outer side of the leather cup, at least four magnetic stripes formed by second magnetic steels which are closely arranged along the axial direction are respectively arranged on the outer surfaces of the third cylinder and the fourth cylinder, a second steel brush is densely distributed on the upper surface of each second magnetic steel, a detection strip formed by a plurality of second probes which are arranged along the circumferential direction is arranged between the adjacent magnetic stripes, a plurality of third magnetic steels are respectively arranged on two sides of the detection strip and between the adjacent magnetic strips, third steel brushes are densely distributed on the outer surfaces of the third magnetic steels, a plurality of mileage wheels are mounted on a rear flange of the fourth cylinder and are in contact connection with the inner wall of the pipeline;
the first probe and the second probe respectively further comprise a parallelogram elastic support and a sensor arranged on the support, the lower surface of the elastic support is arranged on the second barrel, an installation notch 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 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, 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;
a second front pressing plate is installed on the front side of the second front leather cup, a second rear pressing plate is installed on the rear side of the second rear leather cup, a plurality of second front bolts sequentially penetrate through the second front pressing plate, the second front leather cup and the second front flange and are fixedly connected with the front end face of the second barrel, a plurality of second rear bolts sequentially penetrate through the second rear pressing plate, the second rear leather cup and the second rear flange and are fixedly connected with the rear end face of the second barrel, a plurality of first adapter boxes are installed on the second front pressing plate, and the first adapter boxes are respectively and electrically connected with the numerical control box and the first probe;
the mileage wheel further comprises a mounting plate, a wheel seat and a wheel body which are connected with the second rear flange, one end of the wheel seat is rotatably connected with the mounting plate, the other end of the wheel seat is mounted on the wheel body, a cylinder is respectively arranged on the mounting plate and positioned on two sides of the wheel seat, and the two cylinders are respectively connected with the wheel seat through a tension spring.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the sensor includes a hall sensor and an eddy current sensor.
2. In the above scheme, a counting chip is installed on the wheel seat and on one side of the wheel body, a counting magnet corresponding to the counting chip is arranged on the wheel body, and the counting magnet rotates along with the wheel body.
3. In the above scheme, the wheel seat comprises two side plates arranged in parallel, and the middle parts of the two side plates are connected through a pin.
4. 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.
5. 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.
6. In the above scheme, battery sections are arranged in the first barrel, the second barrel, the third barrel and the fourth barrel.
7. In the above scheme, two ends of the battery section are respectively connected with a mounting bracket, and the circumferential outer surface of the mounting bracket is in close contact with the inner wall of the pipeline.
8. In the above scheme, the mounting bracket is an elastic bracket.
9. In the above scheme, the first front flange, the first rear flange, the second front flange, the second rear flange, the front flange and the rear flange are all provided with a circular ring groove, and a sealing ring is embedded in the circular ring groove.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the omnibearing pipeline magnetic flux leakage detector can move in a pipeline with 15% of deformation, accurately detect the defects in the pipeline passing through in the axial direction and the circumferential direction at 360 degrees, effectively identify the defect position, the defect property and the like of the pipeline, and provide accurate data guidance for the maintenance of the pipeline.
2. According to the omnibearing pipeline magnetic flux leakage detector, due to the arrangement of the probe structure, the upper surface of the probe can be always in interference with the inner wall of a pipeline to be tested, namely, the probe and the inner wall of the pipeline are always in a tight fit state, so that 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.
3. According to the omnibearing pipeline magnetic flux leakage detector, 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, the arrangement of the third magnetic steels ensures the uniformity of magnetic field distribution in the circumferential direction, and the condition that the magnetic field sensed by the middle probe is far larger than the magnetic field sensed by the probes on the two sides in the plurality of probes forming the detection strip is avoided, so that the condition that the test values of the two adjacent probes for the same defect are too large to be rejected is avoided, and the test precision is further improved.
4. The invention relates to an omnibearing pipeline magnetic flux leakage detector.A plurality of first adapter boxes are arranged on a second front pressure plate, the first adapter boxes are respectively and electrically connected with a numerical control box and a first probe, and the adapter boxes arranged on the pressure plate can connect a plurality of probes to one adapter box and then are connected with the numerical control box through the adapter boxes, so that the number and the length of connecting wires are greatly reduced, and the adapter boxes are arranged on the pressure plate of each cylinder body instead of the surface of the cylinder body, thereby not only preventing the probes from being pressed to the adapter boxes when being extruded and deformed in a pipeline, but also avoiding the situation that the length of the cylinder body is lengthened to cause difficulty in running.
5. The invention relates to an omnibearing pipeline magnetic flux leakage detector, wherein a mileage wheel further comprises a mounting plate, a wheel seat and a wheel body which are connected with a second rear flange, one end of the wheel seat is rotatably connected with the mounting plate, the other end of the wheel seat is provided with the wheel body, a cylinder is respectively arranged on the mounting plate and positioned at two sides of the wheel seat, the two cylinders are respectively connected with the wheel seat through a tension spring, the mileage wheel is arranged, the device can be well supported, the advancing mileage of the device in a pipeline can be recorded, the accurate motion track of the device in the pipeline can be provided by matching with other positioning devices, the position of the pipeline corresponding to each pipeline defect can be obtained by matching with the detection data of a probe, and the tension spring can ensure the contact pressure between the wheel body and the inner wall of the pipeline, so that the wheel body always keeps moderate force to be attached to the inner wall of the pipeline, not only ensures the accurate detection of the mileage of the device in the pipe, but also reduces the friction damage caused by the contact of the wheel body and the pipe wall and prolongs the service life of the mileage wheel.
Drawings
FIG. 1 is a cross-sectional view of the structure of the omnibearing pipeline magnetic flux leakage detector of the present invention;
FIG. 2 is a schematic view of a partial structure of the omnibearing pipeline magnetic flux leakage detector of the present invention;
FIG. 3 is a partial structural cross-sectional view of the omnibearing pipeline magnetic flux leakage detector of the present invention;
FIG. 4 is a schematic view of a local structure of a mile wheel of the omnibearing pipeline magnetic flux leakage detector;
FIG. 5 is a partial structural sectional view of a odometer wheel of the omnidirectional pipeline magnetic flux leakage detector of the present invention;
FIG. 6 is a schematic view of a probe structure of the omnibearing pipeline magnetic flux leakage detector;
FIG. 7 is a schematic view of a partial structure of the omnibearing pipeline magnetic flux leakage detector of the present invention;
FIG. 8 is a sectional view of a partial structure of the omnibearing pipeline magnetic flux leakage detector of the present invention;
FIG. 9 is a magnetic steel distribution diagram of the omnibearing pipeline magnetic flux leakage detector of 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; 17. a steel brush pressing plate; 18. a second front platen; 19. a second rear platen; 20. a second front bolt; 21. a second rear bolt; 22. a first splice cassette; 23. a wheel seat; 24. a wheel body; 25. a cylinder; 26. a tension spring; 27. counting chips; 28. counting the magnets; 29. a side plate; 32. mounting a plate; 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; 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: an omnibearing pipeline magnetic flux leakage detector comprises a first barrel 1, a second barrel 2, 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 second barrel 2, the third barrel 1b and the fourth barrel 2b are connected through a chain 6 in sequence, and the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel 1;
the outer surface of the second cylinder body 2 is provided with a plurality of first probes 4 and a plurality of first magnetic steels 5, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second cylinder body 2, the first probes 4 are electrically connected with the numerical control box 3, the plurality of first magnetic steels 5 are divided into two groups on average, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second cylinder 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 probes 4 arranged along the circumferential direction of the second cylinder body 2, a magnetic field is generated through the magnetic steels and is conducted by the steel brushes, two sides of each magnetic ring 16 are respectively provided with a steel brush pressing plate 17, and the opposite surfaces of the steel brush pressing plates 17 at two sides of each magnetic ring 16 are in contact connection with 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;
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 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, the outer side of each 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 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 closely arranging second magnetic steel 7b 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 arranging a plurality of second probes 10b along the circumferential direction are arranged between the adjacent magnetic stripes 8b, a plurality of third magnetic steels 12b are respectively arranged on the two sides of the detection strips and between the adjacent magnetic stripes 8b, and third steel 13b are densely distributed on the outer surface of the third magnetic steel 12b, 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 first probe 4 and the second probe 10b further comprise a parallelogram-shaped elastic support 1a and a sensor mounted on the support 1a, the lower surface of the elastic support 1a is mounted on the second cylinder 2, a mounting notch is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a is wrapped outside the sensor, the insulating sleeve 3a is embedded into the mounting notch 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 formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove 7a is formed 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;
a second front pressing plate 18 is installed on the front side of the second front leather cup 13, a second rear pressing plate 19 is installed on the rear side of the second rear leather cup 14, a plurality of second front bolts 20 sequentially penetrate through the second front pressing plate 18, the second front leather cup 13 and the second front flange 11 and are fixedly connected with the front end face of the second barrel 2, a plurality of second rear bolts 21 sequentially penetrate through the second rear pressing plate 19, the second rear leather cup 14 and the second rear flange 12 and are fixedly connected with the rear end face of the second barrel 2, a plurality of first adapter boxes 22 are installed on the second front pressing plate 18, and the first adapter boxes 22 are respectively and electrically connected with the numerical control box 3 and the first probe 4;
the mileage wheel 15 further comprises a mounting plate 32 connected with the second rear flange 12, a wheel seat 23 and a wheel body 24, one end of the wheel seat 23 is rotatably connected with the mounting plate 32, the other end of the wheel seat 23 is mounted on the wheel body 24, a column 25 is respectively arranged on the mounting plate 32 and positioned at two sides of the wheel seat 23, and the two columns 25 are respectively connected with the wheel seat 23 through a tension spring 26.
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 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;
a counting chip 27 is mounted on the wheel seat 23 and on one side of the wheel body 24, a counting magnet 28 corresponding to the counting chip 27 is disposed on the wheel body 24, and the counting magnet 28 rotates with the wheel body 24; the wheel seat 23 comprises two side plates 29 arranged in parallel, and the middle parts of the two side plates 29 are connected through a pin;
the wear-resistant layer 4a is a chromium oxide ceramic wafer; the elastic bracket 1a is a polyurethane bracket; the number of the mileage wheels 15 is 4; the first front leather cup 9, the first rear leather cup 10, the second front leather cup 13, the second rear leather cup 14 and the leather cup 5b are all polyurethane leather cups; the number of the magnetic strips 8b on the third cylinder 1b and the fourth cylinder 2b is 4; 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 probe 10b and the numerical control box 3.
Example 2: an omnibearing pipeline magnetic flux leakage detector comprises a first barrel 1, a second barrel 2, 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 second barrel 2, the third barrel 1b and the fourth barrel 2b are connected through a chain 6 in sequence, and the plurality of numerical control boxes 3 are arranged at equal intervals along the circumferential direction of the first barrel 1;
the outer surface of the second cylinder body 2 is provided with a plurality of first probes 4 and a plurality of first magnetic steels 5, the plurality of first probes 4 are arranged at equal intervals along the circumferential direction of the second cylinder body 2, the first probes 4 are electrically connected with the numerical control box 3, the plurality of first magnetic steels 5 are divided into two groups on average, each group of first magnetic steels 5 are respectively and continuously arranged along the circumferential direction of the second cylinder 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 probes 4 arranged along the circumferential direction of the second cylinder body 2, a magnetic field is generated through the magnetic steels and is conducted by the steel brushes, two sides of each magnetic ring 16 are respectively provided with a steel brush pressing plate 17, and the opposite surfaces of the steel brush pressing plates 17 at two sides of each magnetic ring 16 are in contact connection with 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;
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 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, the outer side of each 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 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 closely arranging second magnetic steel 7b 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 arranging a plurality of second probes 10b along the circumferential direction are arranged between the adjacent magnetic stripes 8b, a plurality of third magnetic steels 12b are respectively arranged on the two sides of the detection strips and between the adjacent magnetic stripes 8b, and third steel 13b are densely distributed on the outer surface of the third magnetic steel 12b, 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 first probe 4 and the second probe 10b further comprise a parallelogram-shaped elastic support 1a and a sensor mounted on the support 1a, the lower surface of the elastic support 1a is mounted on the second cylinder 2, a mounting notch is formed in the upper surface of the elastic support 1a, an insulating sleeve 3a is wrapped outside the sensor, the insulating sleeve 3a is embedded into the mounting notch 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 formed at an acute angle formed between the lower bottom and the first side edge, a third fillet groove 7a is formed 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;
a second front pressing plate 18 is installed on the front side of the second front leather cup 13, a second rear pressing plate 19 is installed on the rear side of the second rear leather cup 14, a plurality of second front bolts 20 sequentially penetrate through the second front pressing plate 18, the second front leather cup 13 and the second front flange 11 and are fixedly connected with the front end face of the second barrel 2, a plurality of second rear bolts 21 sequentially penetrate through the second rear pressing plate 19, the second rear leather cup 14 and the second rear flange 12 and are fixedly connected with the rear end face of the second barrel 2, a plurality of first adapter boxes 22 are installed on the second front pressing plate 18, and the first adapter boxes 22 are respectively and electrically connected with the numerical control box 3 and the first probe 4;
the mileage wheel 15 further comprises a mounting plate 32 connected with the second rear flange 12, a wheel seat 23 and a wheel body 24, one end of the wheel seat 23 is rotatably connected with the mounting plate 32, the other end of the wheel seat 23 is mounted on the wheel body 24, a column 25 is respectively arranged on the mounting plate 32 and positioned at two sides of the wheel seat 23, and the two columns 25 are respectively connected with the wheel seat 23 through a tension spring 26.
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;
the first cylinder 1, the second cylinder 2, the third cylinder 1b and the fourth cylinder 2b are all internally provided with a battery section 14 b; two ends of the battery section 14b are respectively connected with a mounting bracket, and the circumferential outer surface of the mounting bracket is tightly contacted with the inner wall of the pipeline; the mounting bracket is an elastic bracket, so that the interference of shaking generated in the movement process of the equipment on the battery is avoided, and the service life and the safety of the battery are ensured;
all be provided with a circular ring groove on flange 7, flange 11 before first back flange 8, the second, flange 12 behind the second, preceding flange 3b and the back flange 4b before the aforesaid, this circular ring inslot embedding has the sealing washer, further guarantees to embed the leakproofness of the barrel that has the battery, avoids inflammable oil gas in the pipeline to get into contact the battery in the barrel and produce potential safety hazards such as short circuit, explosion.
By adopting the omnibearing pipeline magnetic flux leakage detector, the detector can move in a pipeline with 15% of deformation, accurately detect the defects in the pipeline passing through in the axial direction and the circumferential direction at 360 degrees, effectively identify the defect position, the defect property 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, the arrangement of the fillet groove enables the elastic support to have a buffer area when being extruded in the pipeline, the situations that the support is locally fractured or cannot rebound due to the fact that the stress generated by the elastic support is too large and too concentrated when being rapidly extruded is avoided, the tight fit between the probe and the inner wall of the pipeline can be further guaranteed after the equipment is used for a long time, and the detection precision is guaranteed;
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 ensured to be always 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 detection precision of the pipeline is further improved;
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;
in addition, the adapter box arranged on the pressing plate can connect a plurality of probes to one adapter box and then is connected with the numerical control box through the adapter box, so that the number and the length of connecting lines are greatly reduced, and the adapter box is arranged on the pressing plate of each cylinder body instead of the surface of the cylinder body, so that the probes can be prevented from being pressed on the adapter box when being extruded and deformed in a pipeline, and the situation that the probes are difficult to finish due to the fact that the length of the cylinder body is lengthened can be avoided;
in addition, the arrangement of the mileage wheel can not only play a good supporting role for the device, but also record the traveling mileage of the device in the pipeline, and can be matched with other positioning devices to provide an accurate motion track of the device in the pipeline, and can obtain the pipeline position corresponding to each pipeline defect by matching with the detection data of the probe.
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 (10)
1. The utility model provides an all-round pipeline magnetic leakage detector which characterized in that: the device comprises a first cylinder (1), a second cylinder (2), 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 second cylinder (2), the third cylinder (1 b) and the fourth cylinder (2 b) are sequentially connected through a chain (6), and the plurality of numerical control boxes (3) are arranged at equal intervals along the circumferential direction of the first cylinder (1);
a plurality of first probes (4) and a plurality of first magnetic steels (5) are arranged on the outer surface of the second cylinder (2), the plurality of first probes (4) are arranged at equal intervals along the circumferential direction of the second cylinder (2), the first probe (4) is electrically connected with the numerical control box (3), a 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 cylinder (2), and steel brushes are uniformly and densely distributed on each first magnetic steel (5), thereby forming 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 body (2), two sides of each magnetic ring (16) are respectively provided with a steel brush pressing plate (17), and the opposite surfaces of the steel brush pressing plates (17) on the two sides of each magnetic ring (16) are in contact connection with the steel brushes on the magnetic rings (16);
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);
equally divide on preceding, two back terminal surfaces of third barrel (1 b) and fourth barrel (2 b) and do not be connected with preceding flange (3 b), back flange (4 b), every all the cover is equipped with a leather cup (5 b) on preceding flange (3 b), back flange (4 b), the outside of leather cup (5 b) is provided with one and closely arranges magnetic stripe (8 b) that form along axial direction by second magnet steel (7 b) in one's own right with leather cup clamp plate (6 b) that preceding flange (3 b), back flange (4 b) are connected, it has second steel brush (9 b) all to gather on every second magnet steel (7 b) upper surface respectively to be provided with between adjacent magnetic stripe (8 b) by the detection strip that a plurality of second probe (10 b) arranged along circumference, it is provided with a plurality of third magnet steel (12 b) respectively to survey the both sides of strip and be located between adjacent magnetic stripe (8 b) A third steel brush (13 b) is densely distributed on the outer surface of the third magnetic steel (12 b), a plurality of mileage wheels (15) are mounted on a rear flange (4 b) of the fourth cylinder (2 b), and the mileage wheels (15) are in contact connection with the inner wall of the pipeline;
the first probe (4) and the second probe (10 b) further comprise 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 arranged on the second cylinder (2), an installation gap is formed in the upper surface of the elastic support (1 a), an insulating sleeve (3 a) is wrapped outside the sensor, the insulating sleeve (3 a) is embedded into the installation gap and fixedly connected with the upper surface of the elastic support (1 a), a wear-resistant layer (4 a) is connected to the upper surface of the insulating sleeve (3 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);
a second front pressing plate (18) is installed on the front side of the second front leather cup (13), a second rear pressing plate (19) is installed on the rear side of the second rear leather cup (14), a plurality of second front bolts (20) sequentially penetrate through the second front pressing plate (18), the second front leather cup (13) and the second front flange (11) and are fixedly connected with the front end face of the second barrel (2), a plurality of second rear bolts (21) sequentially penetrate through the second rear pressing plate (19), the second rear leather cup (14) and the second rear flange (12) and are fixedly connected with the rear end face of the second barrel (2), a plurality of first transfer boxes (22) are installed on the second front pressing plate (18), and the first transfer boxes (22) are electrically connected with the numerical control box (3) and the first probe (4) respectively;
mileage wheel (15) further include mounting panel (32), wheel seat (23) and wheel body (24) be connected with second rear flange (12), the one end and mounting panel (32) rotatable coupling of wheel seat (23), install the other end of wheel seat (23) wheel body (24), mounting panel (32) are gone up and are located wheel seat (23) both sides and are provided with a cylinder (25) respectively, and these two cylinders (25) are connected through an extension spring (26) between wheel seat (23) separately.
2. The omni-directional pipeline magnetic flux leakage detector according to claim 1, characterized in that: the sensor comprises a Hall sensor and an eddy current sensor.
3. The omni-directional pipeline magnetic flux leakage detector according to claim 1, characterized in that: a counting chip (27) is arranged on the wheel seat (23) and positioned on one side of the wheel body (24), a counting magnet (28) corresponding to the counting chip (27) is arranged on the wheel body (24), and the counting magnet (28) rotates along with the wheel body (24).
4. The omni-directional pipeline magnetic flux leakage detector according to claim 1, characterized in that: the wheel seat (23) comprises two side plates (29) which are arranged in parallel, and the middle parts of the two side plates (29) are connected through a pin.
5. The omni-directional pipeline magnetic flux leakage detector 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.
6. The omni-directional pipeline magnetic flux leakage detector according to claim 1, characterized in that: 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).
7. The omni-directional pipeline magnetic flux leakage detector according to claim 1, characterized in that: and battery sections (14 b) are arranged in the first cylinder body (1), the second cylinder body (2), the third cylinder body (1 b) and the fourth cylinder body (2 b).
8. The omni-directional flux leakage detector for a pipeline according to claim 7, wherein: two ends of the battery section (14 b) are respectively connected with a mounting bracket, and the circumferential outer surface of the mounting bracket is tightly contacted with the inner wall of the pipeline.
9. The omni-directional flux leakage detector for a pipeline according to claim 8, wherein: the mounting bracket is an elastic bracket.
10. The omni-directional flux leakage detector for a pipeline according to claim 9, wherein: the first front flange (7), the first rear flange (8), the second front flange (11), the second rear flange (12), the front flange (3 b) and the rear flange (4 b) are all provided with a circular ring groove, and a sealing ring is embedded in the circular ring groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010179791.4A CN112903810B (en) | 2020-03-16 | 2020-03-16 | Omnibearing pipeline magnetic leakage detector |
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| CN202010179791.4A CN112903810B (en) | 2020-03-16 | 2020-03-16 | Omnibearing pipeline magnetic leakage detector |
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| CN112903810B CN112903810B (en) | 2023-10-13 |
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| CN114166931A (en) * | 2021-12-10 | 2022-03-11 | 苏州帝泰克检测设备有限公司 | Magnetic leakage detector |
| CN114166094A (en) * | 2021-12-10 | 2022-03-11 | 苏州帝泰克检测设备有限公司 | Diameter measuring detector |
| CN115452938A (en) * | 2022-10-11 | 2022-12-09 | 国家石油天然气管网集团有限公司 | Detection equipment for pipeline weld defects |
| CN116263428A (en) * | 2021-12-15 | 2023-06-16 | 中国石油管道局工程有限公司 | A pipeline circumferential excitation detection device |
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| US6847207B1 (en) * | 2004-04-15 | 2005-01-25 | Tdw Delaware, Inc. | ID-OD discrimination sensor concept for a magnetic flux leakage inspection tool |
| CN208239353U (en) * | 2018-05-04 | 2018-12-14 | 苏州帝泰克检测设备有限公司 | Defect detector in continuous conduit |
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| CN115452938A (en) * | 2022-10-11 | 2022-12-09 | 国家石油天然气管网集团有限公司 | Detection equipment for pipeline weld defects |
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