CN110441387B - Omnibearing magnetic leakage detector - Google Patents
Omnibearing magnetic leakage detector Download PDFInfo
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- CN110441387B CN110441387B CN201810418839.5A CN201810418839A CN110441387B CN 110441387 B CN110441387 B CN 110441387B CN 201810418839 A CN201810418839 A CN 201810418839A CN 110441387 B CN110441387 B CN 110441387B
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 131
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 120
- 239000010959 steel Substances 0.000 claims abstract description 120
- 238000001514 detection method Methods 0.000 claims abstract description 94
- 230000004907 flux Effects 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 230000005415 magnetization Effects 0.000 claims description 19
- 239000010985 leather Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 15
- 230000006698 induction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
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- 229920006395 saturated elastomer Polymers 0.000 description 1
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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
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Abstract
The invention discloses an omnibearing magnetic flux leakage detector which comprises a first detection joint, a second detection joint and universal joints for connecting the first detection joint and the second detection joint, wherein the tail end of the first detection joint is connected with the front end of the second detection joint through the universal joints and bolts, a plurality of probes are circumferentially arranged on the outer surface of a central cylinder body to form a detection ring, a plurality of supporting wheel mechanisms are circumferentially arranged on the outer surface of the central supporting cylinder at equal intervals, one ends, far away from a base, of a first side plate and a second side plate are provided with supporting wheels, the distribution direction of a testing head is perpendicular to the distribution direction of a first magnetic steel belt, a front supporting bowl and a rear supporting bowl are respectively arranged on a front flange and a rear flange, a plurality of rollers are respectively arranged on the end face of each yoke, the universal joints are sequentially sleeved by three metal rings, and the outer sides of the metal rings are coated with flexible rubber sleeves. The invention realizes the omnibearing detection of the circumferential and axial defects of the pipeline.
Description
Technical Field
The invention relates to an omnibearing magnetic flux leakage detector, belonging to the technical field of pipeline defect detection.
Background
At present, the serious problems faced by the oil gas long-distance pipeline in China are as follows: most in-service pipelines are built in 60 to 70 years, and the pipelines enter the middle-aged and old period and are in an accident-prone stage. The maintenance cost for the oil and gas pipeline in China is up to hundreds of millions of yuan each year, and the maintenance cost has a gradually increasing trend. Because of the restriction of the detection means, most of the damage conditions of the pipeline cannot be accurately judged and positioned, and unnecessary losses such as blind excavation, blind scrapping, lack of scientificity in maintenance and the like are often caused. The magnetic leakage method is one of the important means for nondestructive detection of oil and gas long-distance pipeline, and it judges the size of workpiece defect by measuring the leakage magnetic field intensity of magnetized ferromagnetic material workpiece surface. The detection principle of the magnetic leakage method is that the detected object is required to have good magnetic flux characteristics, when the local magnetic flux of the detected object is saturated, two poles of the magnet and the detected object form a closed magnetic field, if the medium in the detected object is uniformly distributed, no gap or internal and external defects exist, and no magnetic flux is considered to pass through the outer wall in an ideal state. The price of the foreign device is very high, the application requirement cannot be met in quantity, the existing magnetizing device cannot effectively magnetize the oil pipe, the magnetization intensity is low, the detection quality is low, and the problem of blockage easily occurs when the oil pipe passes through the reducing part of the pipeline.
Disclosure of Invention
The invention aims to provide an omnibearing magnetic flux leakage detector which realizes omnibearing detection of circumferential and axial defects of a pipeline.
In order to achieve the above purpose, the invention adopts the following technical scheme: the omnibearing magnetic flux leakage detector comprises a first detection joint, a second detection joint and a universal joint used for connecting the first detection joint and the second detection joint, wherein the tail end of the first detection joint is connected with the front end of the second detection joint through the universal joint and a bolt;
the first detection section further comprises a magnetization detection sleeve, a front driving bowl, a rear leather cup, a front supporting cylinder and a rear supporting cylinder, wherein the front supporting cylinder, the front driving bowl, the magnetization detection sleeve, the rear leather cup and the rear supporting cylinder are sequentially and fixedly connected;
the magnetization detection sleeve further comprises a central cylinder body, a plurality of first magnetic steels, a first steel brush and a plurality of probes, wherein the probes are circumferentially arranged on the outer surface of the central cylinder body to form a detection ring, the first magnetic steels are circumferentially arranged on the outer surface of the central cylinder body to form a first magnetic steel ring and a second magnetic steel ring respectively, the first magnetic steel ring and the second magnetic steel ring are respectively positioned on two sides of the detection ring, and the first steel brushes are uniformly densely distributed on the upper surface of the first magnetic steel;
The front support cylinder, the front drive bowl, the magnetization detection sleeve, the rear leather cup and the central cylinder body of the rear support cylinder are internally provided with a machine core, a battery bin, a hydraulic cylinder and a hydraulic valve, the hydraulic valve is arranged in the central cylinder body of the front support cylinder through a support ring, the rear end of the hydraulic valve is connected with the hydraulic cylinder, the battery bin is arranged behind the hydraulic cylinder through a mounting ring, and the machine core is connected with the battery bin in a mounting way;
The front support cylinder and the rear support cylinder further comprise a first central support cylinder and a plurality of support wheel mechanisms, the plurality of support wheel mechanisms are arranged on the outer surface of the first central support cylinder at equal intervals along the circumferential direction, the support wheel mechanisms further comprise a base, a first side plate, a second side plate, a rotating shaft and support wheels, the rotating shaft is arranged on the base, the first side plate and the second side plate are arranged in parallel and are connected through the rotating shaft, one ends, close to the base, of the first side plate and the second side plate are respectively provided with a compression spring component, and one ends, far away from the base, of the first side plate and the second side plate are provided with the support wheels;
the second detection section further comprises a second central supporting cylinder, 4 yokes, a plurality of second magnetic steels and a plurality of test heads, wherein the 4 yokes are arranged on the outer side of the second central supporting cylinder at equal intervals along the circumferential direction, the second magnetic steels are uniformly distributed on two sides of the outer surface of each yoke, the uniformly distributed second magnetic steels respectively form a first magnetic steel strip and a second magnetic steel strip, and the test heads are uniformly distributed between the first magnetic steel strip and the second magnetic steel strip at equal intervals;
The first magnetic steel strip and the second magnetic steel strip are parallel to the axial direction of the second central supporting cylinder, the distribution direction of the test head is perpendicular to the distribution direction of the first magnetic steel strip, second steel brushes are densely distributed on the outer surface of the second magnetic steel strip, a front flange plate and a rear flange plate are respectively arranged at two ends of the second central supporting cylinder, a front supporting bowl and a rear supporting bowl are respectively arranged on the front flange plate and the rear flange plate, and a plurality of rollers are respectively arranged on the end face of each yoke;
the universal joint is formed by sequentially sleeving three metal rings, and the outer side of each metal ring is coated with a flexible rubber sleeve.
The further improved scheme in the technical scheme is as follows:
1. In the above scheme, the first side plate and the second side plate are V-shaped plates.
2. In the scheme, a plurality of support shafts are arranged between the first side plate and the second side plate.
3. In the above scheme, the supporting wheel is a polyurethane wheel.
4. In the scheme, the flexible rubber sleeve is a cylindrical polyurethane sleeve.
5. In the above scheme, a plurality of second magnetic steels are distributed between the first magnetic steel strip and the second magnetic steel strip, and the distribution direction of the second magnetic steels is the same as the respective direction of the test head.
6. In the above scheme, the number of the plurality of rollers is 4, and the rollers are respectively positioned at two ends of the first magnetic steel belt and the second magnetic steel belt.
7. In the above scheme, be provided with a plurality of battery bars between yoke lower surface and the second central support section of thick bamboo surface, these a plurality of battery bars are along circumference evenly distributed.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. The invention discloses an omnibearing magnetic flux leakage detector which comprises a first detection joint, a second detection joint and a universal joint used for connecting the first detection joint and the second detection joint, wherein the tail end of the first detection joint is connected with the front end of the second detection joint through the universal joint and a bolt, the universal joint is formed by sequentially sleeving three metal rings, the outer side of each metal ring is coated with a flexible rubber sleeve, and the flexible universal joint is arranged, so that the universal joint can be bent, and the detector can pass through a curve; secondly, the distribution of first magnet steel and probe in the first detection section is sensitive to the defect induction in pipeline circumference direction, can detect the circumferential defect of pipeline by high accuracy, and the distribution of second magnet steel and probe in the second detection section is sensitive to the defect induction in pipeline circumference direction, can accurately detect the circumferential defect on the pipeline, and two detection sections are combined and arranged to realize the omnibearing detection of pipeline circumference and axial defect.
2. The invention discloses an omnibearing magnetic flux leakage detector, wherein a first magnetic steel strip and a second magnetic steel strip are parallel to the axial direction of a second central support cylinder, the distribution direction of a test head is perpendicular to the distribution direction of the first magnetic steel strip, second steel brushes are densely distributed on the outer surface of the second magnetic steel, a front flange and a rear flange are respectively arranged at two ends of the second central support cylinder, a front support bowl and a rear support bowl are respectively arranged on the front flange and the rear flange, a plurality of rollers are respectively arranged on the end face of each yoke, and the rollers are arranged to play a supporting role, so that a tiny gap is formed between the second steel brushes and the pipe wall, the second steel brushes are prevented from being worn in the running process of the detector, and the detection precision is ensured; secondly, be provided with a plurality of battery bars between its yoke lower surface and the second central support section of thick bamboo surface, this a plurality of battery bars are along circumference evenly distributed, and the embedment of battery bar rationally utilizes the space, reduces the overall dimension of detector, more conveniently detects small-bore pipeline.
3. The invention discloses an omnibearing magnetic flux leakage detector, wherein a core, a battery bin, a hydraulic cylinder and a hydraulic valve are arranged in a central cylinder body of a front supporting cylinder, a front driving bowl, a magnetization detecting sleeve, a rear leather cup and a rear supporting cylinder, the hydraulic valve is arranged in the central cylinder body of the front supporting cylinder through a supporting ring, the rear end of the hydraulic valve is connected with the hydraulic cylinder, the battery bin is arranged behind the hydraulic cylinder through a mounting ring, the core is connected with the battery bin in an installation way, and the hydraulic valve and the hydraulic cylinder are arranged, so that the hydraulic valve can be driven by the hydraulic cylinder to perform telescopic movement so as to control liquid or gas in the central cylinder body, thereby controlling the pressure difference at two sides of the hydraulic valve and achieving the effect of controlling the integral movement speed of the detector.
4. The invention discloses an omnibearing magnetic flux leakage detector, which comprises a support wheel mechanism, a base, a first side plate, a second side plate, a rotating shaft and a support wheel, wherein the rotating shaft is arranged on the base, the first side plate and the second side plate are arranged in parallel and are connected through the rotating shaft, one ends of the first side plate and the second side plate, which are close to the base, are respectively provided with a compression spring component, one ends of the first side plate and the second side plate, which are far away from the base, are provided with the support wheel, the support wheel is provided with elastic force by the arrangement of the compression spring component in the support wheel mechanism, so that the support wheel can always keep close contact with the inner wall of a pipeline, and compressible space is provided for the support wheel when the support wheel encounters deformation of the pipeline, and the smoothness and stability of the detector in the pipeline are ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the omnibearing magnetic flux leakage detector of the present invention;
FIG. 2 is a schematic diagram of a first detection section in the omnibearing magnetic flux leakage detector according to the present invention;
FIG. 3 is a cross-sectional view of a first detection section of the omni-directional magnetic flux leakage detector of the present invention;
FIG. 4 is a schematic view of a partial structure of a first detection section in the omnibearing magnetic flux leakage detector according to the present invention.
FIG. 5 is a schematic diagram of a second detection section of the omnibearing magnetic flux leakage detector according to the present invention;
FIG. 6 is a cross-sectional view of a second detection section of the omni-directional magnetic flux leakage detector of the present invention.
In the above figures: 21. a first detection section; 22. a second detection section; 23. a universal joint; 231. a metal ring; 232. a flexible gum cover;
1. A magnetization detection sleeve; 101. a central cylinder; 102. a first magnetic steel; 103. a first steel brush; 104. a probe; 105. a detection ring; 106. a first magnetic steel ring; 107. the second magnetic steel ring; 111. a movement; 112. a battery compartment; 113. a hydraulic cylinder; 114. a hydraulic valve; 2. a front drive bowl; 3. a rear leather cup; 4. a front support cylinder; 5. a rear support cylinder; 401. a first center support cylinder; 402. a support wheel mechanism; 403. a base; 404. a first side plate; 405. a second side plate; 406. a rotating shaft; 407. a support wheel; 408. a compression spring assembly;
1a, a second central support cylinder; 2a, yoke iron; 3a, second magnetic steel; 4a, a test head; 5a, a first magnetic steel strip; 6a, a second magnetic steel strip; 7a, a second steel brush; 8a, a front flange plate; 9a, a rear flange plate; 10a, front support bowl; 11a, rear support bowl; 12a, a roller; 15a, battery stick.
Detailed Description
Example 1: the omnibearing magnetic flux leakage detector comprises a first detection joint 21, a second detection joint 22 and a universal joint 23 for connecting the first detection joint 21 and the second detection joint 22, wherein the tail end of the first detection joint 21 is connected with the front end of the second detection joint 22 through the universal joint 23 and bolts;
The first detection section 21 further comprises a magnetization detection sleeve 1, a front driving bowl 2, a rear leather cup 3, a front support cylinder 4 and a rear support cylinder 5, wherein the front support cylinder 4, the front driving bowl 2, the magnetization detection sleeve 1, the rear leather cup 3 and the rear support cylinder 5 are fixedly connected in sequence;
The magnetization detection sleeve 1 further comprises a central cylinder 101, a plurality of first magnetic steels 102, a first steel brush 103 and a plurality of probes 104, wherein the probes 104 are circumferentially arranged on the outer surface of the central cylinder 101 to form a detection ring 105, the first magnetic steels 102 are circumferentially arranged on the outer surface of the central cylinder 101 to form a first magnetic steel ring 106 and a second magnetic steel ring 107, the first magnetic steel ring 106 and the second magnetic steel ring 107 are respectively positioned on two sides of the detection ring 105, and the first steel brushes 103 are uniformly and densely distributed on the upper surface of the first magnetic steels 102;
The front support cylinder 4, the front drive bowl 2, the magnetization detection sleeve 1, the rear leather cup 3 and the central cylinder body of the rear support cylinder 5 are internally provided with a machine core 111, a battery cabin 112, a hydraulic cylinder 113 and a hydraulic valve 114, wherein the hydraulic valve 114 is arranged in the central cylinder body of the front support cylinder 4 through a support ring, the rear end of the hydraulic valve 114 is connected with the hydraulic cylinder 113, the battery cabin 112 is arranged behind the hydraulic cylinder 113 through a mounting ring, and the machine core 111 is connected with the battery cabin 112 in a mounting way;
The front support cylinder 4 and the rear support cylinder 5 further comprise a first central support cylinder 401 and a plurality of support wheel mechanisms 402, the plurality of support wheel mechanisms 402 are arranged on the outer surface of the first central support cylinder 401 at equal intervals along the circumferential direction, the support wheel mechanisms 402 further comprise a base 403, a first side plate 404, a second side plate 405, a rotating shaft 406 and support wheels 407, the rotating shaft 406 is arranged on the base 403, the first side plate 404 and the second side plate 405 are arranged in parallel and are connected through the rotating shaft 406, one ends of the first side plate 404 and the second side plate 405, which are close to the base 403, are respectively provided with a compression spring assembly 408, and one ends of the first side plate 404 and the second side plate 405, which are far away from the base 403, are provided with the support wheels 407;
the second detecting section 22 further comprises a second central supporting cylinder 1a, 4 yokes 2a, a plurality of second magnetic steels 3a and a plurality of test heads 4a, the 4 yokes 2a are arranged at the outer side of the second central supporting cylinder 1a at equal intervals along the circumferential direction, the second magnetic steels 3a are uniformly distributed on two sides of the outer surface of each yoke 2a, the uniformly distributed second magnetic steels 3a respectively form a first magnetic steel strip 5a and a second magnetic steel strip 6a, and the test heads 4a are uniformly distributed between the first magnetic steel strip 5a and the second magnetic steel strip 6a at equal intervals;
The first magnetic steel strips 5a and the second magnetic steel strips 6a are parallel to the axial direction of the second central supporting cylinder 1a, the distribution direction of the test heads 4a is perpendicular to the distribution direction of the first magnetic steel strips 5a, second steel brushes 7a are densely distributed on the outer surfaces of the second magnetic steels 3a, a front flange 8a and a rear flange 9a are respectively arranged at two ends of the second central supporting cylinder 1a, a front supporting bowl 10a and a rear supporting bowl 11a are respectively arranged on the front flange 8a and the rear flange 9a, and a plurality of rollers 12a are respectively arranged on the end face of each yoke 2a;
the universal joint 23 is formed by sequentially sleeving three metal rings 231, and a flexible rubber sleeve 232 is coated on the outer side of the metal rings 231.
The first side plate 404 and the second side plate 405 are V-shaped plates; a plurality of support shafts are arranged between the first side plate 404 and the second side plate 405; the supporting wheel 407 is a polyurethane wheel; the flexible glue cover 232 is a cylindrical polyurethane cover.
Example 2: the omnibearing magnetic flux leakage detector comprises a first detection joint 21, a second detection joint 22 and a universal joint 23 for connecting the first detection joint 21 and the second detection joint 22, wherein the tail end of the first detection joint 21 is connected with the front end of the second detection joint 22 through the universal joint 23 and bolts;
The first detection section 21 further comprises a magnetization detection sleeve 1, a front driving bowl 2, a rear leather cup 3, a front support cylinder 4 and a rear support cylinder 5, wherein the front support cylinder 4, the front driving bowl 2, the magnetization detection sleeve 1, the rear leather cup 3 and the rear support cylinder 5 are fixedly connected in sequence;
The magnetization detection sleeve 1 further comprises a central cylinder 101, a plurality of first magnetic steels 102, a first steel brush 103 and a plurality of probes 104, wherein the probes 104 are circumferentially arranged on the outer surface of the central cylinder 101 to form a detection ring 105, the first magnetic steels 102 are circumferentially arranged on the outer surface of the central cylinder 101 to form a first magnetic steel ring 106 and a second magnetic steel ring 107, the first magnetic steel ring 106 and the second magnetic steel ring 107 are respectively positioned on two sides of the detection ring 105, and the first steel brushes 103 are uniformly and densely distributed on the upper surface of the first magnetic steels 102;
The front support cylinder 4, the front drive bowl 2, the magnetization detection sleeve 1, the rear leather cup 3 and the central cylinder body of the rear support cylinder 5 are internally provided with a machine core 111, a battery cabin 112, a hydraulic cylinder 113 and a hydraulic valve 114, wherein the hydraulic valve 114 is arranged in the central cylinder body of the front support cylinder 4 through a support ring, the rear end of the hydraulic valve 114 is connected with the hydraulic cylinder 113, the battery cabin 112 is arranged behind the hydraulic cylinder 113 through a mounting ring, and the machine core 111 is connected with the battery cabin 112 in a mounting way;
The front support cylinder 4 and the rear support cylinder 5 further comprise a first central support cylinder 401 and a plurality of support wheel mechanisms 402, the plurality of support wheel mechanisms 402 are arranged on the outer surface of the first central support cylinder 401 at equal intervals along the circumferential direction, the support wheel mechanisms 402 further comprise a base 403, a first side plate 404, a second side plate 405, a rotating shaft 406 and support wheels 407, the rotating shaft 406 is arranged on the base 403, the first side plate 404 and the second side plate 405 are arranged in parallel and are connected through the rotating shaft 406, one ends of the first side plate 404 and the second side plate 405, which are close to the base 403, are respectively provided with a compression spring assembly 408, and one ends of the first side plate 404 and the second side plate 405, which are far away from the base 403, are provided with the support wheels 407;
The second detecting section 22 further comprises a second central supporting cylinder 1a, 4 yokes 2a, a plurality of second magnetic steels 3a and a plurality of test heads 4a, the 4 yokes 2a are arranged at equal intervals on the outer side of the second central supporting cylinder 1a along the circumferential direction, the second magnetic steels 3a are uniformly distributed on two sides of the outer surface of each yoke 2a, the uniformly distributed second magnetic steels 3a respectively form a first magnetic steel strip 5a and a second magnetic steel strip 6a, and the test heads 4a are uniformly distributed between the first magnetic steel strip 5a and the second magnetic steel strip 6 a;
The first magnetic steel strips 5a and the second magnetic steel strips 6a are parallel to the axial direction of the second central supporting cylinder 1a, the distribution direction of the test heads 4a is perpendicular to the distribution direction of the first magnetic steel strips 5a, second steel brushes 7a are densely distributed on the outer surfaces of the second magnetic steels 3a, a front flange 8a and a rear flange 9a are respectively arranged at two ends of the second central supporting cylinder 1a, a front supporting bowl 10a and a rear supporting bowl 11a are respectively arranged on the front flange 8a and the rear flange 9a, and a plurality of rollers 12a are respectively arranged on the end face of each yoke 2a;
The universal joint 23 is formed by sequentially sleeving three metal rings 231, and the outer side of the metal ring 24 is coated with a flexible rubber sleeve 232.
A plurality of second magnetic steels 3a are also distributed between the first magnetic steel belt 5a and the second magnetic steel belt 6a, and the distribution direction of the second magnetic steels 3a is the same as the respective directions of the test heads 4 a; the number of the rollers 12a is 4, and the rollers are respectively positioned at two ends of the first magnetic steel strip 5a and the second magnetic steel strip 6 a;
A plurality of battery bars 15a are arranged between the lower surface of the yoke 2a and the outer surface of the second center support cylinder 1a, and the plurality of battery bars 15a are uniformly distributed along the circumferential direction.
When the omnibearing magnetic flux leakage detector is adopted, the flexible universal joint is arranged, so that the universal joint can be bent, and the detector can pass through a curve; secondly, the distribution of the magnetic steel and the probe in the first detection section is sensitive to the defect induction in the circumferential direction of the pipeline, so that the circumferential defect of the pipeline can be detected with high precision, the distribution of the magnetic steel and the probe in the second detection section is sensitive to the defect induction in the circumferential direction of the pipeline, the circumferential defect on the pipeline can be accurately detected, and the two detection sections are combined and arranged, so that the omnibearing detection of the circumferential and axial defects of the pipeline is realized; thirdly, the rollers play a supporting role, so that a tiny gap is formed between the steel brush and the pipe wall, and the steel brush is protected from being worn in the running process of the detector, so that the detection precision is ensured; thirdly, the battery rod is internally arranged, so that the space is reasonably utilized, the overall size of the detector is reduced, and the detection of the small-diameter pipeline is more convenient; thirdly, the hydraulic valve and the hydraulic cylinder are arranged, so that the hydraulic valve can stretch and retract under the drive of the hydraulic cylinder to control liquid or gas passing through the central cylinder, thereby controlling the pressure difference at two sides of the hydraulic valve and achieving the effect of controlling the overall movement speed of the detector; and the pressure spring assembly in the supporting wheel mechanism is arranged to provide elastic force for the supporting wheel, so that the supporting wheel can always keep close contact with the inner wall of the pipeline, and compressible space can be provided for the supporting wheel when encountering deformation of the pipeline, thereby ensuring smoothness and stability of the detector running in the pipeline.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (6)
1. An all-round magnetic leakage detector, characterized by: the device comprises a first detection joint (21), a second detection joint (22) and a universal joint (23) for connecting the first detection joint (21) and the second detection joint (22), wherein the tail end of the first detection joint (21) is connected with the front end of the second detection joint (22) through the universal joint (23) and bolts;
The first detection section (21) further comprises a magnetization detection sleeve (1), a front driving bowl (2), a rear leather cup (3), a front supporting cylinder (4) and a rear supporting cylinder (5), wherein the front supporting cylinder (4), the front driving bowl (2), the magnetization detection sleeve (1), the rear leather cup (3) and the rear supporting cylinder (5) are sequentially and fixedly connected;
The magnetization detection sleeve (1) further comprises a central cylinder (101), a plurality of first magnetic steels (102), a first steel brush (103) and a plurality of probes (104), wherein the probes (104) are circumferentially arranged on the outer surface of the central cylinder (101) to form a detection ring (105), the first magnetic steels (102) are circumferentially arranged on the outer surface of the central cylinder (101) to form a first magnetic steel ring (106) and a second magnetic steel ring (107), the first magnetic steel ring (106) and the second magnetic steel ring (107) are respectively positioned on two sides of the detection ring (105), and the first steel brushes (103) are uniformly and densely distributed on the upper surface of the first magnetic steels (102);
the device comprises a front support cylinder (4), a front driving bowl (2), a magnetization detection sleeve (1), a rear leather cup (3) and a central cylinder body of a rear support cylinder (5), wherein a machine core (111), a battery bin (112), a hydraulic cylinder (113) and a hydraulic valve (114) are arranged in the central cylinder body of the front support cylinder (4), the hydraulic valve (114) is installed in the central cylinder body of the front support cylinder (4) through a support ring, the rear end of the hydraulic valve (114) is connected with the hydraulic cylinder (113), the battery bin (112) is installed behind the hydraulic cylinder (113) through a mounting ring, and the machine core (111) is installed and connected with the battery bin (112);
The front support cylinder (4) and the rear support cylinder (5) further comprise a first central support cylinder (401) and a plurality of support wheel mechanisms (402), the plurality of support wheel mechanisms (402) are arranged on the outer surface of the first central support cylinder (401) at equal intervals along the circumferential direction, the support wheel mechanisms (402) further comprise a base (403), a first side plate (404), a second side plate (405), a rotating shaft (406) and support wheels (407), the rotating shaft (406) is arranged on the base (403), the first side plate (404) and the second side plate (405) are arranged in parallel and are connected through the rotating shaft (406), one ends, close to the base (403), of the first side plate (404) and the second side plate (405) are provided with a compression spring component (408) respectively, and one ends, far away from the base (403), of the first side plate (404) and the second side plate (405) are provided with the support wheels (407).
The second detection section (22) further comprises a second central supporting cylinder (1 a), 4 yokes (2 a), a plurality of second magnetic steels (3 a) and a plurality of test heads (4 a), wherein the 4 yokes (2 a) are arranged on the outer side of the second central supporting cylinder (1 a) at equal intervals along the circumferential direction, the second magnetic steels (3 a) are uniformly distributed on two sides of the outer surface of each yoke (2 a), the uniformly distributed second magnetic steels (3 a) respectively form a first magnetic steel strip (5 a) and a second magnetic steel strip (6 a), and the test heads (4 a) are uniformly distributed between the first magnetic steel strip (5 a) and the second magnetic steel strip (6 a);
the first magnetic steel strips (5 a) and the second magnetic steel strips (6 a) are parallel to the axial direction of the second central support cylinder (1 a), the distribution direction of the test heads (4 a) is perpendicular to the distribution direction of the first magnetic steel strips (5 a), second steel brushes (7 a) are densely distributed on the outer surface of the second magnetic steel strips (3 a), a front flange plate (8 a) and a rear flange plate (9 a) are respectively arranged at two ends of the second central support cylinder (1 a), a front support bowl (10 a) and a rear support bowl (11 a) are respectively arranged on the front flange plate (8 a) and the rear flange plate (9 a), and a plurality of rollers (12 a) are respectively arranged on the end face of each yoke (2 a);
the universal joint (23) is formed by sequentially sleeving three metal rings (231), and the outer side of each metal ring (231) is coated with a flexible rubber sleeve (232).
2. The omnidirectional magnetic flux leakage detector of claim 1, wherein: the first side plate (404) and the second side plate (405) are V-shaped plates.
3. The omnidirectional magnetic flux leakage detector of claim 1, wherein: a plurality of support shafts are arranged between the first side plate (404) and the second side plate (405).
4. The omnidirectional magnetic flux leakage detector of claim 1, wherein: the supporting wheel (407) is a polyurethane wheel.
5. The omnidirectional magnetic flux leakage detector of claim 1, wherein: the flexible rubber sleeve (232) is a cylindrical polyurethane sleeve.
6. The omnidirectional magnetic flux leakage detector of claim 1, wherein: the number of the rollers (12 a) is 4, and the rollers are respectively positioned at two ends of the first magnetic steel belt (5 a) and the second magnetic steel belt (6 a).
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