CN112816547B - Magnetic leakage sensor correction device and correction method for magnetic leakage internal detection - Google Patents
Magnetic leakage sensor correction device and correction method for magnetic leakage internal detection Download PDFInfo
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- 238000012937 correction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 title claims description 7
- 238000009434 installation Methods 0.000 claims abstract description 25
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 23
- 239000004020 conductor Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a magnetic leakage sensor correction device for detecting magnetic leakage, which comprises: the magnet is used for fixing a magnet positioning tool of the magnet and a pipeline tool for installing the magnet positioning tool; the pipeline tool is used for simulating a pipeline and comprises a pair of semicircular arc plates which are butted into a cylindrical body; magnet location frock includes: the installation seat is fixedly connected with the pipeline tool, and the height adjusting bracket is in sliding connection with the installation seat; the magnet is fixed on the height adjusting bracket. The invention also discloses a magnetic leakage sensor correction method for detecting the magnetic leakage. According to the invention, the magnets are arranged above the magnetic leakage sensors for magnetic signal enhancement, so that the signal difference of each magnetic leakage sensor is obvious, and more magnetic leakage sensor signal data can be obtained by adjusting different positions of the magnets, so that the magnetic leakage sensors can be accurately corrected.
Description
Technical Field
The invention relates to the field of pipeline magnetic leakage detection, in particular to a magnetic leakage sensor correction device and a correction method for detecting magnetic leakage.
Background
At present, for the magnetic flux leakage internal detector, the sensor is a key for measuring the defects inside and outside the pipeline, the sensor has the difference of signals among the sensors due to the problems of production process and assembly, for the small-caliber internal detector, the sensor correction is only to directly measure the signal of each sensor, the difference of the measured signals of each sensor is not obvious due to weak magnetic force signals, and the correction accuracy is low.
Disclosure of Invention
The invention provides a correction device and a correction method for a magnetic leakage sensor for detecting magnetic leakage in order to solve the technical problems in the prior art.
The invention adopts the technical proposal for solving the technical problems in the prior art that: a magnetic leakage sensor correction device for in-leakage detection, comprising: the magnet is used for fixing a magnet positioning tool of the magnet and a pipeline tool for installing the magnet positioning tool; the pipeline tool is used for simulating a pipeline and comprises a pair of semicircular arc plates which are butted into a cylindrical body; magnet location frock includes: the installation seat is fixedly connected with the pipeline tool, and the height adjusting bracket is in sliding connection with the installation seat; the magnet is fixed on the height adjusting bracket.
Further, the height-adjusting bracket includes: the base is vertically fixed on a height adjusting rod on the base, and the magnet seat is fixedly connected with the height adjusting rod at different height positions; the magnet is fixed on the magnet base, and the base is in sliding connection with the mounting base.
Further, a plurality of clamping grooves with different heights from the base are formed in the height adjusting rod; the magnet seat is clamped on the clamping groove of the height adjusting rod.
Further, a plurality of mounting holes with different heights from the base are formed in the height adjusting rod; the magnet seat is fixedly connected with the height adjusting rod through bolts penetrating through the mounting holes.
Further, the left side and the right side of each semicircular arc plate are provided with connecting lugs with through holes; the bolts penetrate through the through holes and then are locked, and the pair of semicircular arc-shaped plates are butted into the simulation pipeline.
Further, the mounting seat is an arc-shaped seat matched with the outer surface of the pipeline tool; an arc-shaped sliding rail is arranged on the upper surface of the upper surface; the bottom of the height-adjusting bracket is in sliding fit with the arc-shaped sliding rail and slides along the circumferential direction of the pipeline tool.
Further, a plurality of groups of parallel arc-shaped sliding rails are arranged on the mounting seat.
Further, a plurality of bosses are circumferentially uniformly distributed on the outer surface of the pipeline tool; the boss is provided with a threaded hole for fixing the mounting seat.
Further, the central angle of the arc-shaped sliding rail is larger than 90 degrees.
The invention also provides a correction method of the magnetic leakage sensor for detecting the magnetic leakage, which comprises the following steps: the magnet is used for fixing a magnet positioning tool of the magnet and a pipeline tool for installing the magnet positioning tool; the pipeline tool is formed by butting a pair of semicircular arc plates into a cylindrical body and is used for simulating a pipeline; magnet location frock sets up: the installation seat is fixedly connected with the pipeline tool, and the height adjusting bracket is in sliding connection with the installation seat; the mounting seat adopts an arc-shaped seat matched with the outer surface of the pipeline tool; an arc-shaped sliding rail is arranged on the upper surface of the upper surface; mounting the mounting seat on a pipeline tool with a built-in leakage magnetic sensor; the bottom of the height adjusting bracket is in sliding fit with the arc-shaped sliding rail; the magnet is adjusted and fixed on the height adjusting bracket;
The height adjusting support is moved along the arc-shaped sliding rail for a plurality of times, the central angle of the arc-shaped sliding rail corresponding to each movement stroke is set to be n, n=30-90 degrees, and the height adjusting support is moved 360 degrees along the circumferential direction of the pipeline tool; collecting signals of a magnetic leakage sensor when the height adjusting bracket moves each time;
The height of the magnet from the mounting seat is adjusted, and the height adjusting bracket is repeatedly moved along the circumferential direction of the pipeline tool in the state of different heights of the magnet from the mounting seat, wherein the central angle of the arc-shaped sliding rail corresponding to each movement stroke is n until the height adjusting bracket moves 360 degrees along the circumferential direction of the pipeline tool; and collecting signals of the leakage magnetic sensor every time the height adjusting bracket moves.
Further, a plurality of groups of parallel arc-shaped sliding rails are arranged on the mounting seat; the height adjusting brackets are respectively in sliding fit with the arc-shaped sliding rails of different groups, so that the height adjusting brackets axially displace along the pipeline tool.
The invention has the advantages and positive effects that: the pipeline work is simulated by adopting the pipeline work, the built-in magnetic leakage sensor is installed in the simulated pipeline of the pipeline work structure, the magnet is placed at a certain distance above the magnetic leakage sensor to strengthen magnetic signals, so that the signal difference of each magnetic leakage sensor is obvious, more signal data of the magnetic leakage sensor are obtained by adjusting different positions of the magnet, and the magnetic leakage sensor can be accurately corrected.
Drawings
Fig. 1 is a schematic perspective view of a built-in leakage magnetic sensor according to the present invention.
Fig. 2 is a schematic perspective view of a non-mounted leakage sensor according to the present invention.
Fig. 3 is a front view of fig. 2.
In the figure: 1. a magnet holder; 2. a height adjusting lever; 3. a base; 4. a magnet; 5. a mounting base; 6. an arc-shaped slide rail; 7. a pipeline tool; 8. a leakage magnetic sensor; 9. a connecting lug; 10. a boss; 11. a sliding block.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
Referring to fig. 1 to 3, a magnetic leakage sensor correction device for detecting magnetic leakage includes: the magnet 4 is used for fixing a magnet positioning tool of the magnet 4 and a pipeline tool 7 for installing the magnet positioning tool; the pipeline tool 7 is used for simulating a pipeline and comprises a pair of semicircular arc plates which are butted into a cylindrical body; magnet location frock includes: the installation seat 5 is fixedly connected with the pipeline tool 7, and the height adjusting bracket is in sliding connection with the installation seat 5; the magnet 4 is fixed to the height adjustment bracket. The height of the fixed position of the magnet 4 from the outer surface of the cylinder can be adjusted and changed in correction.
In order to avoid magnetization, the magnet positioning tool is made of non-magnetic conductive materials.
Preferably, the height-adjusting bracket may include: the base 3 is vertically fixed on the height adjusting rod 2 on the base 3, and the magnet base 1 is fixedly connected with the height adjusting rod 2 at different height positions; the magnet 4 is fixed on the magnet base 1, and the base 3 is in sliding connection with the mounting base 5.
The height adjusting rod 2 can adopt various structures in the prior art, so that the magnet base 1 is fixedly connected with the height adjusting rod 2 at different height positions, and the height of the magnet base 1 relative to the base 3 is adjustable.
For example, a plurality of clamping grooves with different heights from the base 3 can be arranged on the height adjusting rod 2; the magnet holder 1 is clamped on a clamping groove of the height adjusting rod 2. The magnet base 1 is clamped on clamping grooves with different heights, so that the height adjustment and change of the magnet base 1 relative to the base 3 are realized.
Preferably, the height adjusting rod 2 is provided with a plurality of mounting holes with different heights from the base 3; the magnet base 1 is fixedly connected with the height adjusting rod 2 through bolts penetrating through the mounting holes. The mounting hole on the height adjusting rod 2 can be set to be a threaded hole, the magnet seat 1 can be L-shaped, a through hole matched with the mounting hole on the height adjusting rod 2 can be arranged on the side surface parallel to the height adjusting rod 2, and the magnet seat 1 is fixed on the height adjusting rod 2 by penetrating the through hole through a bolt and screwing the through hole with the mounting hole on the height adjusting rod 2. The magnet holder 1 can also be provided with a jack; the bolt is inserted into the insertion hole of the magnet seat 1 through the mounting hole on the height adjusting rod 2, and the magnet seat 1 is fixed on the height adjusting rod 2. The magnet seat 1 is fixedly connected with the height adjusting rod 2 through bolts or bolts passing through mounting holes with different heights, so that the height adjusting change of the magnet seat 1 relative to the base 3 is realized.
The pair of semi-circular arc-shaped plates are butted into a cylindrical body to form the simulation pipeline, and various butting methods in the prior art can be adopted for butting. Preferably, the left and right sides of each semicircular arc plate are provided with connecting lugs 9 with through holes; the bolts penetrate through the through holes and then are locked, and the pair of semicircular arc-shaped plates are butted into the simulation pipeline.
For accurately correcting the leakage magnetic sensor 8, collecting more data, preferably, the mounting seat 5 is an arc seat matched with the outer surface of the pipeline tool 7; an arc-shaped sliding rail 6 is arranged on the upper surface of the upper surface; the bottom of the height-adjusting bracket is in sliding fit with the arc-shaped sliding rail 6 and slides along the circumferential direction of the pipeline tool 7. When the magnet 4 moves along the circumferential direction of the pipeline tool 7, the signal of the magnetic leakage sensor 8 is enhanced, more signals of the magnetic leakage sensor 8 can be collected, and therefore the magnetic leakage sensor 8 can be calibrated more accurately.
The set of arc-shaped slide rails 6 may include two parallel guide rails a and B, which are fixedly connected to the mounting base 5. The base 3 can be provided with a sliding block 11, and the sliding block 11 is in sliding fit with the guide rail A and the guide rail B.
A plurality of groups of parallel arc-shaped sliding rails 6 can be arranged on the mounting seat 5. The adjustable magnet 4 is thus displaced axially along the pipe tooling 7. The position of the magnet 4 is convenient to axially adjust, so that the magnet 4 is positioned right above the leakage magnetic sensor 8.
In order to facilitate the installation of the installation seat 5 of the magnet positioning tool, preferably, a plurality of bosses 10 are circumferentially uniformly distributed on the outer surface of the pipeline tool 7; the boss 10 is provided with a threaded hole for fixing the mounting seat 5.
In order to facilitate measurement of the acquired data, the central angle of the arcuate slide rail 6 is preferably greater than 90 °.
The invention also provides an embodiment of a magnetic leakage sensor correction method for detecting the magnetic leakage, which comprises the following steps: the magnet 4 is used for fixing a magnet positioning tool of the magnet 4 and a pipeline tool 7 for installing the magnet positioning tool; the pipeline tool 7 is formed by butting a pair of semicircular arc plates into a cylindrical body for simulating a pipeline; magnet location frock sets up: the installation seat 5 is fixedly connected with the pipeline tool 7, and the height adjusting bracket is in sliding connection with the installation seat 5; the mounting seat 5 adopts an arc-shaped seat matched with the outer surface of the pipeline tool 7; an arc-shaped sliding rail 6 with a central angle of 30-360 degrees can be arranged on the sliding rail. The central angle of the arc-shaped slide rail 6 is preferably slightly larger than 90 °.
The mounting seat 5 is mounted on a pipeline tool 7 with a built-in leakage magnetic sensor; the bottom of the height adjusting bracket is in sliding fit with the arc-shaped sliding rail 6; the magnet 4 is adjustably fixed to the height adjustment bracket.
The height adjusting bracket is moved along the arc-shaped sliding rail 6 for a plurality of times, the central angle of the arc-shaped sliding rail 6 corresponding to each movement stroke of the height adjusting bracket is set to be n, n=30-90 degrees, until the height adjusting bracket moves 360 degrees along the circumferential direction of the pipeline tool 7; collecting signals of a magnetic leakage sensor when the height adjusting bracket moves each time; the central angle of the arc-shaped slide rail 6 corresponding to each moving stroke of the height adjusting bracket is preferably 90 degrees, namely n is preferably 90 degrees.
If the central angle of the arc-shaped sliding rail 6 of the installation seat 5 is smaller than 2n, the installation seat 5 needs to be disassembled and assembled, so that the installation seat 5 moves along the circumferential direction of the pipeline tool 7, and the central angle of the circumferential movement of the installation seat 5 is equal to n; moving the height adjusting bracket by a central angle n along the arc-shaped sliding rail; repeatedly disassembling and assembling the mounting seat 5 until the height adjusting bracket moves 360 degrees of central angle along the circumferential direction of the pipeline tool; the signal of the leakage magnetic sensor is collected every time the height adjusting bracket moves along the arc-shaped sliding rail 6.
The height of the magnet 4 from the mounting seat 5 is adjusted, the height adjusting bracket is repeatedly moved along the circumferential direction of the pipeline tool 7 under the condition of different heights of the magnet from the mounting seat, and the central angle of the arc-shaped sliding rail corresponding to the moving stroke of the height adjusting bracket is n each time until the height adjusting bracket moves 360 degrees of central angle along the circumferential direction of the pipeline tool; and collecting signals of the leakage magnetic sensor every time the height adjusting bracket moves.
The height of the magnet 4 from the mounting seat 5 can be adjusted for multiple times, and the operation is repeated, so that the height adjusting bracket moves 360 degrees of central angle along the circumferential direction of the pipeline tool 7 and acquires signals of the leakage magnetic sensor 8 at different heights.
Preferably, in order to facilitate the positioning of the adjusting magnet 4 right above the magnetic leakage sensor 8, a plurality of groups of parallel arc-shaped sliding rails 6 are arranged on the mounting seat 5; the height adjusting brackets are respectively in sliding fit with the arc-shaped sliding rails 6 of different groups, so that the height adjusting brackets axially displace along the pipeline tool 7.
The working principle of the invention is further illustrated in the following by a preferred embodiment of the invention:
Referring to fig. 1 to 3, a magnetic leakage sensor correction device for detecting magnetic leakage includes a magnet 4, a magnet positioning tool for fixing the magnet 4, and a pipe tool 7 for installing the magnet positioning tool; the pipe tooling 7 comprises a pair of semicircular arc plates which are butted into a cylindrical body surrounding the pipe; magnet location frock includes: the mounting seat 5 is fixedly connected with the semicircular arc plate, and the height adjusting bracket is in sliding connection with the mounting seat 5; the magnet 4 is fixed to the height-adjusting bracket in a height-adjusting manner.
The left and right sides of each semicircular arc plate are provided with connecting lugs 9 with through holes; the bolts penetrate through the through holes and then are locked, and the pair of semicircular arc-shaped plates are fixed on the pipeline.
The mounting seat 5 is an arc-shaped seat matched with the outer surface of the pipeline; an arc-shaped sliding rail 6 is arranged on the upper surface of the upper surface; the bottom of the height adjusting bracket is in sliding fit with the arc-shaped sliding rail 6.
The height adjusting bracket comprises a base 3, a height adjusting rod 2 vertically fixed on the base 3, a magnet seat 1 vertically connected with the height adjusting rod 2, and a magnet 4 fixed on the magnet seat 1.
Three jacks with different heights from the base 3 are arranged on the height adjusting rod 2; the magnet base 1 is provided with pins which are inserted into the jacks.
The two pipeline tools 7 are connected through bolts at the side edges, and the materials of the pipeline tools 7 are the same as those of an actual oil pipeline. And (3) placing the magnetic leakage joint of the magnetic leakage inner detector into the pipeline, so that a magnetic circuit in the magnetic leakage joint of the magnetic leakage inner detector is clung to the inner wall of the pipeline. The magnet positioning tool is arranged on the pipeline tool 7, the installation seat 5 is fixedly connected with the pipeline tool 7, the magnet is fixed on the height adjusting bracket, the base 3 of the height adjusting bracket is arranged on the arc-shaped slide rail 6 of the installation seat 5, the position of the base is right above the magnetic leakage sensor 8, the magnet positioning tool is provided with three height gears, and the height distance between the bottom surface of the magnet 4 and the base 3 can be adjusted. The intensity of the magnetic force signal can be changed by adjusting the height distance between the bottom surface of the magnet 4 and the base 3, and different sensor signals can be obtained by moving the base 3 of the height adjusting bracket at the position of the guide rail.
The inner detector of magnetic leakage is placed in the pipe tooling 7. The arc-shaped sliding rail 6 comprises two parallel guide rails A and B, two through holes are formed in the sides of the guide rails A and B, and the arc-shaped sliding rail can be connected with threaded holes in the pipeline tool 7 through bolts and can be installed on the pipeline tool 7. The slide block 11 is firstly arranged in the guide rails, then the two guide rails are connected by the connecting piece, and the whole guide rails are arranged on the pipeline tool 7. The correction magnet is arranged on the magnet holder 1, and then the magnet holder 1 is arranged on the height adjusting bracket, the height adjusting bracket has three installation positions, and the heights of the three installation positions from the base 3 are different, so that the height of the magnet can be adjusted. After the installation, the magnet can be moved from one end of the arc-shaped sliding rail 6 to the other end, and the travel angle of the travel can be the central angle of 90 degrees. After the test is completed, the pipeline tool 7 is disassembled and rotated by 90 degrees, the position and the posture of the detector in the magnetic leakage are unchanged, other sensor signals of the detector are continuously measured, the measurement is performed for 4 times in the mode, and the signals of the sensor within the 360-degree range are measured.
Wherein the guide rail A, the guide rail B, the height adjusting bracket, the magnet base 1 and the sliding block 11 are all made of non-magnetic materials. If magnetic conductive materials are used for the parts, the magnets magnetize the parts, so that the distribution of magnetic fields is affected, the measurement signals of the sensor are inaccurate, and therefore, non-magnetic conductive materials are selected.
The following further describes the components of the device:
1. the correction magnet is used as the magnet 4 to increase the magnetic field signal intensity.
2. And the pipeline tools 7 are made of the same material as the oil and gas transmission pipelines, the two pipeline tools 7 are connected together through holes on two sides by bolts and nuts, the inner detector is placed in the through holes, and the working condition of the detector in actual pipeline work is simulated.
3. The height adjusting bracket is made of non-magnetic conductive materials, and comprises a base 3, a height adjusting rod 2 vertically fixed on the base 3, a magnet seat 1 vertically connected with the height adjusting rod 2, and a magnet 4 fixed on the magnet seat 1.
The magnet seat 1 is connected with the height adjusting rod 2 through screws, the height adjusting rod 2 is provided with three height adjusting mounting holes, the height of the correcting magnet from the magnetic leakage sensor 8 can be adjusted, and meanwhile signals of the magnetic leakage sensor 8 can be respectively collected under different height conditions.
The base 3 of the height adjusting bracket is provided with a sliding block 11 in sliding fit with the mounting seat 5, and the sliding block 11 is used for driving the height adjusting bracket to slide relative to the mounting seat 5.
The magnet holder 1 is used for fixing a magnet for correction, and is made of non-magnetic material and connected with the magnet for correction through a screw.
4. The mounting seat 5 is an arc-shaped seat matched with the outer surface of the pipeline tool 7; an arc-shaped sliding rail 6 is arranged on the upper surface of the upper surface; the bottom slide block 11 of the height adjusting bracket is in sliding fit with the arc slide rail 6.
5. The arc-shaped slide rail 6 comprises a guide rail A and a guide rail B, wherein the guide rail A and the guide rail B are made of non-magnetic permeable materials. The guide rail A is matched with the guide rail B to form a chute which is in sliding fit with the slide block 11, the bottom of the slide block 11 is embedded into the chute and slides along the chute to form a working stroke track of the slide block 11, and the whole stroke is at a central angle of 90 degrees. The guide rail A, B is connected with the pipeline tool 7 through a screw and is installed on the pipeline tool 7.
6. The guide rail connecting piece is connected with the two ends of the guide rail A and the guide rail B and used for limiting the moving stroke of the sliding block 11, the guide rail connecting piece is made of non-magnetic permeable materials, and when the guide rail connecting piece is assembled, the sliding block 11 is firstly arranged in the guide rail A, and then the guide rail connecting piece is connected with the two ends of the guide rail B and the guide rail A.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (10)
1. A magnetic leakage sensor correction device for in-leakage detection, comprising: the magnet is used for fixing a magnet positioning tool of the magnet and a pipeline tool for installing the magnet positioning tool; the pipeline tool is used for simulating a pipeline and comprises a pair of semicircular arc plates which are butted into a cylindrical body; magnet location frock includes: the installation seat is fixedly connected with the pipeline tool, and the height adjusting bracket is in sliding connection with the installation seat; the magnet is fixed on the height adjusting bracket;
The mounting seat is an arc-shaped seat matched with the outer surface of the pipeline tool; an arc-shaped sliding rail is arranged on the upper surface of the upper surface; the bottom of the height adjusting bracket is in sliding fit with the arc-shaped sliding rail and slides along the circumferential direction of the pipeline tool;
The height adjusting support is moved along the arc-shaped sliding rail for a plurality of times, the central angle of the arc-shaped sliding rail corresponding to each movement stroke is set to be n, n=30-90 degrees, and the height adjusting support is moved 360 degrees along the circumferential direction of the pipeline tool; collecting signals of a magnetic leakage sensor when the height adjusting bracket moves each time;
The height of the magnet from the mounting seat is adjusted, and the height adjusting bracket is repeatedly moved along the circumferential direction of the pipeline tool in the state of different heights of the magnet from the mounting seat, wherein the central angle of the arc-shaped sliding rail corresponding to each movement stroke is n until the height adjusting bracket moves 360 degrees along the circumferential direction of the pipeline tool; and collecting signals of the leakage magnetic sensor every time the height adjusting bracket moves.
2. The magnetic leakage sensor correction device for in-leakage detection according to claim 1, wherein the height adjustment bracket comprises: the base is vertically fixed on a height adjusting rod on the base, and the magnet seat is fixedly connected with the height adjusting rod at different height positions; the magnet is fixed on the magnet base, and the base is in sliding connection with the mounting base.
3. The correction device for magnetic leakage sensor for detecting magnetic leakage according to claim 2, wherein a plurality of clamping grooves with different heights from the base are arranged on the height adjusting rod; the magnet seat is clamped on the clamping groove of the height adjusting rod.
4. The correction device for magnetic leakage sensor for detecting magnetic leakage according to claim 2, wherein a plurality of mounting holes having different heights from the base are provided on the height adjusting lever; the magnet seat is fixedly connected with the height adjusting rod through bolts penetrating through the mounting holes.
5. The correction device for magnetic leakage sensor for detecting magnetic leakage according to claim 1, wherein the left and right sides of each semicircular plate are provided with connecting lugs with through holes; the bolts penetrate through the through holes and then are locked, and the pair of semicircular arc-shaped plates are butted into the simulation pipeline.
6. The correction device for magnetic leakage sensor for detecting magnetic leakage according to claim 1, wherein the mounting base is provided with a plurality of groups of parallel arc-shaped sliding rails.
7. The correction device for the magnetic leakage sensor for detecting the magnetic leakage according to claim 1, wherein a plurality of bosses are circumferentially and uniformly distributed on the outer surface of the pipeline tool; the boss is provided with a threaded hole for fixing the mounting seat.
8. The correction device for magnetic leakage sensor for detection in magnetic leakage according to claim 1, wherein a central angle of the arc-shaped slide rail is larger than 90 °.
9. A method for correcting a leakage magnetic sensor for detecting leakage magnetic flux, characterized in that the method is provided with the following devices: the magnet is used for fixing a magnet positioning tool of the magnet and a pipeline tool for installing the magnet positioning tool; the pipeline tool is formed by butting a pair of semicircular arc plates into a cylindrical body and is used for simulating a pipeline; magnet location frock sets up: the installation seat is fixedly connected with the pipeline tool, and the height adjusting bracket is in sliding connection with the installation seat; the mounting seat adopts an arc-shaped seat matched with the outer surface of the pipeline tool; an arc-shaped sliding rail is arranged on the upper surface of the upper surface; mounting the mounting seat on a pipeline tool with a built-in leakage magnetic sensor; the bottom of the height adjusting bracket is in sliding fit with the arc-shaped sliding rail; the magnet is adjusted and fixed on the height adjusting bracket;
The height adjusting support is moved along the arc-shaped sliding rail for a plurality of times, the central angle of the arc-shaped sliding rail corresponding to each movement stroke is set to be n, n=30-90 degrees, and the height adjusting support is moved 360 degrees along the circumferential direction of the pipeline tool; collecting signals of a magnetic leakage sensor when the height adjusting bracket moves each time;
The height of the magnet from the mounting seat is adjusted, and the height adjusting bracket is repeatedly moved along the circumferential direction of the pipeline tool in the state of different heights of the magnet from the mounting seat, wherein the central angle of the arc-shaped sliding rail corresponding to each movement stroke is n until the height adjusting bracket moves 360 degrees along the circumferential direction of the pipeline tool; and collecting signals of the leakage magnetic sensor every time the height adjusting bracket moves.
10. The correction method for the magnetic leakage sensor for detecting the magnetic leakage according to claim 9, wherein a plurality of groups of parallel arc-shaped sliding rails are arranged on the mounting seat; the height adjusting brackets are respectively in sliding fit with the arc-shaped sliding rails of different groups, so that the height adjusting brackets axially displace along the pipeline tool.
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