CN105546359A - Convenient online constant magnetic detection device for pressure-bearing industrial pipeline - Google Patents
Convenient online constant magnetic detection device for pressure-bearing industrial pipeline Download PDFInfo
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- CN105546359A CN105546359A CN201610037035.1A CN201610037035A CN105546359A CN 105546359 A CN105546359 A CN 105546359A CN 201610037035 A CN201610037035 A CN 201610037035A CN 105546359 A CN105546359 A CN 105546359A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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 a convenient online constant magnetic detection device for a pressure-bearing industrial pipeline. The convenient online constant magnetic detection device comprises a magnetization mechanism and a detection mechanism, wherein the magnetization mechanism comprises a magnetism conducting handle, two constant magnets and two magnetization pole shoes; the two ends of the magnetism conducting handle are respectively connected to the upper sides of the two constant magnets; the lower side of each constant magnet is connected to the magnetization pole shoe; the detection mechanism comprises a probe and a tunnel magneto-resistance bridge array; the two ends of the probe are connected to the inner sides of the magnetization pole shoes located at the two ends of the magnetism conducting handle; the probe is located in the middle between the magnetization pole shoes; the bottom of the probe fits the outer wall of the pipeline to be detected; and the tunnel magneto-resistance bridge array is arranged in the inner cavity of the probe. The convenient online constant magnetic detection device is simple in structure, easy to manufacture, safe and reliable, energy-saving and environmental-friendly, and low in operation failure rate.
Description
Technical field
The present invention relates to the online permanent magnetic detection device of a kind of portable pressure-bearing industrial pipeline.
Background technique
Online pressure-bearing industrial pipeline runs continuously in high temperature, high pressure, high capacity with under the environment such as being corroded, if existing defects, heavy corrosion in pipeline, can cause leakages, burst, even cause disaster.Highly reliable detecting instrument must be adopted, complete detection pipeline quality condition everywhere, ensure the safe operation of pressure-bearing industrial pipeline.
Prior art and deficiency thereof:
At present, eddy current and the large conventional method of ultrasound detection two is usually adopted to detect online pressure-bearing industrial pipeline in the world.
1, eddy current testing adopts ac magnetization device to magnetize pipeline.Because metallic conduit is electric conductor, pipe surface circumferencial direction equivalence can become a closed-loop path enclosed, so ac magnetization field can produce induced current on the surface of pipeline, sense of current rotates along the circumferencial direction of pipe surface, just as the whirlpool of a circle circle, the induced current in this case produced is called as eddy current.Eddy current can cause eddy current to change by the defective locations place of conductor, thus in detecting sensor, cause the change of induced current.But due to the skin effect of eddy current, these eddy current can only be formed at the outer surface of pipeline, the profound defect of pipeline can not cause eddy current to change, so eddy current testing can only find the defect on pipeline material surface and nearly surface, but can't find pipeline profound level and inner wall defect.
2, ultrasound detection is electricity consumption pulse excitation supersonic beam, the lens of probe by sound beam focusing, by medium couples such as oil, water on tube wall, by the transmitting of sound wave in tube wall and refraction situation come defect in testing pipes wall with or without and position.To online pipeline, coating media is very difficult everywhere on the one hand, and the performance of medium couples sound wave is very large on testing result impact on the other hand, is also difficult to online boiler tubing complete detection; Outside it, the sound wave severe jamming ultrasonic signal that pipeline inner high voltage steam or current are formed, is unfavorable for extraction and the identification of ultrasonic signal.Further, the acoustic beam after focusing also can only transmit in the local of pipeline, so ultrasound detection is a kind of method detected pipeline regional area, and can not each point defect of complete detection pipeline.
Above-mentioned the deficiencies in the prior art can be summarized as can only carry out outer surface detection or local detection, and Couplant affects the problems such as detection perform.
Summary of the invention
The technical problem to be solved in the present invention is to provide the online permanent magnetic detection device of a kind of portable pressure-bearing industrial pipeline.
The another one technical problem that the present invention will solve is to provide the online permanent magnetic detection method of a kind of pressure-bearing industrial pipeline.
For the online permanent magnetic detection device of portable pressure-bearing industrial pipeline, the technical solution used in the present invention is, the online permanent magnetic detection device of portable pressure-bearing industrial pipeline, is characterized in that: comprise magnetizable body and detection agency;
Described magnetizable body comprises a magnetic conduction handle (1), two pieces of permanent magnet (2), two pieces of magnetization pole shoes (3); The two ends of described magnetic conduction handle are connected with the upper end of two blocks of permanent magnet respectively, and the lower end of the permanent magnet of every block is connected with one piece of magnetization pole shoe again;
Described detection agency comprises probe (12) and tunnel magneto resistance bridge array (13); The two ends of described probe are connected with the inner side of the magnetization pole shoe (3) being positioned at magnetic conduction handle two ends, and probe is positioned at the neutral position of two pieces of magnetization pole shoes; The outer wall of the detected pipeline of probe bottom laminating, the inner chamber of probe is equipped with tunnel magneto resistance bridge array (13).
As preferably, be positioned at the form connection of polarity by series connection of two blocks of described permanent magnet at magnetic conduction handle (1) two ends, make the magnetic of two blocks of permanent magnet be that superposition strengthens, realize the abundant magnetization to tube wall.
As preferably, magnetizable body also comprises the magnetic short circuited ring (4) with magnetic property; Two described magnetic short circuited rings distinguish the two ends of ring set in magnetic conduction handle (1);
Magnetic short circuited ring can along magnetic conduction handle slide downward and be enclosed within be positioned at magnetic conduction handle two ends permanent magnet (2) around, the magnetic field that permanent magnet one pole is sent is directly coupled to another pole of permanent magnet by magnetic short circuited ring; Or
Magnetic short circuited ring also can along magnetic conduction handle upward sliding and away from being positioned at the permanent magnet (2) at magnetic conduction handle two ends around, another pole of permanent magnet is coupled to by tested tube wall in the magnetic field that permanent magnet one pole is sent, and realizes the magnetization to tested tube wall.
As preferably, magnetizable body also comprises roller (5); Roller described in two groups is separately fixed at the outside of magnetization pole shoe (3), makes to magnetize pole shoe (3) and keeps with detected pipeline the distance that set and can along pipe surface axially or circumferentially to move.
As preferably, detection agency also comprises fixed support (7), probe position-limited rack (9), probe standing screw (10), probe pressuring spring (11); The both sides of described probe position-limited rack (9) are moved in the chute of fixed support (7) both sides, bottom, described probe standing screw (10) top with the screw on fixed support (7) to be threaded, bottom is connected with the probe (12) be positioned at below position-limited rack of popping one's head in through the through hole on probe position-limited rack, described probe pressuring spring (11) to be contained between fixed support and probe position-limited rack and to be enclosed within and pop one's head on standing screw, pressuring spring of popping one's head in will pop one's head in (12) oppress and be fitted in the outer wall of detected pipeline.
As preferably, the cross section of magnetic conduction handle (1) and the cross section of two pieces of permanent magnet (2) are the circle with same diameter.
As preferably, tunnel magneto resistance bridge array (13) is the many groups electric bridge be made up of the tunnel magneto resistance of many.
As preferred further, electric bridge is Wheatstone bridge.
For the online permanent magnetic detection method of pressure-bearing industrial pipeline, the technical solution used in the present invention is, the online permanent magnetic detection method of pressure-bearing industrial pipeline, is characterized in that comprising the following steps:
(1) steady magnetic field is applied to detected pipeline, make to be uniformly distributed in the detected tube wall of magnetic field between this magnetized region; Specifically, constant magnetic field can be applied by permanent magnet or electromagnetic coil;
(2) if the detected inner and outer walls of pipeline between magnetized region or inside have any defect to exist, a part of magnetic field is refracted to pipeline external surface space-title defect magnetic field by defect;
(3) probe be made up of tunnel magneto resistance bridge array is set at detected pipeline external surface, probe detects defect magnetic field and by microprocessor and the position of display device display defect and the figure of the order of severity, realizes the reliable, convenient of online pressure-bearing industrial pipeline and comprehensively detect.
10. the online electromechanical detection method of pressure-bearing industrial pipeline according to claim 9, is characterized in that: described step (3) comprises the following steps:
(4) form tunnel magneto resistance bridge array by many tunnel magneto resistances (TMR), during pipe surface zero defect magnetic field, each electric bridge all balances, and output is zero; During pipe surface defectiveness magnetic field, always there is electric bridge unbalance, export flaw indication;
(5) tunnel magneto resistance bridge array is placed in probe bore, converts defect magnetic field to flaw indication; Presence or absence and the menace level of defect is represented by the amplitude of flaw indication;
(6) by position and the order of severity of micro-process and display device display defect directly perceived, realize the convenience to online pressure-bearing industrial pipeline, detect reliably.
The invention has the beneficial effects as follows:
1, permanent magnet and portable magnetic circuit is adopted to form light magnetizer, steady magnetic field magnetization is carried out to pipeline, pipeline external surface can be excited, the defect of any position in inner-walls of duct and wall can be excited again to form defect magnetic field in pipeline external surface space, meet the reliable of on-line industry pipeline and complete detection requirement;
Execute power supply magnetic field and any detection Couplant outside not needing when 2, detecting, both saved power supply and testing cost, ensure that again testing result is reliable and stable;
3, the sound wave that the steady magnetic field of permanent magnet is not formed by the high pressure steam in online pipeline or current disturbs, and both can detect pipeline component, can implement Site Detection again to the pipeline in on-line operation;
4, many group tunnel magneto resistance electric bridges are adopted to form probe, when there is no defect in pipeline, pipeline external surface zero defect magnetic field, each electric bridge all balances, and does not have signal to export; When in pipeline during defectiveness, form defect magnetic field at pipeline external surface, always have electric bridge unbalance, export flaw indication; Such detection device both along the rapid mobility detect of pipeline external surface, also can stop at any place of pipeline and realize static detection.
5, whole detection device, small volume and less weight, convenient operation, have simultaneously structure simple, be easy to manufacture, the advantage such as operation troubles rate is low, safe and reliable, energy-conserving and environment-protective.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Fig. 2 is the magnetic field schematic diagram (magnetized state) of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Fig. 3 is the magnetic field schematic diagram (unmagnetized state) of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Fig. 4 is the detection agency schematic diagram of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Fig. 5 is the sonde configuration schematic diagram of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Fig. 6 is the wheatstone bridge circuits figure of the online permanent magnetic detection device embodiment of the present invention's portable pressure-bearing industrial pipeline.
Mark in figure, 1-magnetic conduction handle, the permanent magnet of 2-, 3-magnetizes pole shoe, 4-magnetic short circuited ring, 5-trundle, 6-pipeline, 7-probe fixing support, 8-sliding guide groove, 9-pops one's head in position-limited rack, and 10-pops one's head in standing screw, and 11-pops one's head in pressuring spring, 12-pops one's head in, 13-tunnel magneto resistance bridge array, 14-defect, 15-defect magnetic field.
Embodiment
Fig. 1 is the online permanent magnetic detection device of a kind of portable pressure-bearing industrial pipeline, forms by Portable magnetic mechanism with to detection agency two-part of pipeline.
Portable magnetic mechanism is U-shaped, by 1 U-shaped for connecting permanent magnet and there are magnetization pole shoe 3, two pieces of magnetic short circuited rings 4 of magnetic conduction handle 1, two blocks of permanent magnet of circle 2, two pieces of high magnetic conductions of high magnetic conduction and two groups of rollers 5 form.
The magnetic conduction handle of U-shaped is made up of technical pure iron staff, the magnetic field of two blocks of permanent magnet 2 can be coupled together to strengthen magnetic potential intensity by polarity serial fashion, and the handle use be convenient for carrying is used as in the stage casing of U-shaped simultaneously.
There is installation circular hole in the center of circle of two blocks of permanent magnet 2 of circle, the upper end of circular for each block permanent magnet is respectively installed to the two ends of U-shaped magnetic conduction handle 1 by one through the non magnetic bolt installing circular hole, then by this root non magnetic bolt, the lower end of permanent for circle magnet is arranged on respectively the upper end of two pieces of magnetization pole shoes.The outer surface of detected pipeline 6 is pressed close in the lower end of magnetization pole shoe 3, and similar to the curvature on the surface of pipeline, and the magnetic Field Coupling sent by permanent magnet 2 is on tube wall.The form that above-mentioned installation must be connected by the polarity of permanent magnet connects, and ensures that the magnetic of two blocks of permanent magnet of circle is that superposition strengthens, realizes the abundant magnetization to tube wall.The trundle 5 of two V-arrangements is also provided with respectively in the outside that detected pipeline place pressed close to by two pieces of magnetization pole shoes 3, its effect avoids on the one hand magnetizing assembly and can not be adsorbed on detected pipeline 6 and be difficult to move or mention, simultaneously also easy-to-operat personnel promote whole detection device by magnetic conduction handle 1 and move along pipeline, detect pipeline.
Also overlap at the two ends of the permanent magnet of circle 2 and have a magnetic short circuited ring 4 made of iron, magnetic short circuited ring 4 can be enclosed within the two ends of circular permanent magnet 2, or leaves the two ends of circular permanent magnet 2 along magnetic conduction handle pull-up.When magnetic short circuited ring 4 moves the upper end of magnetic conduction handle to, the magnetic field of permanent magnet is coupled on tube wall by magnetization pole shoe, belongs to pipeline magnetization and detected state (Fig. 2); When magnetic short circuited ring cover is incorporated into the both sides of permanent magnet 2, the magnetic field that permanent magnet one pole sends is directly coupled to another pole by magnetic short circuited ring, little magnetic field is only had to be coupled on tube wall, be convenient to easily detection device be extracted leave pipeline, belong to the unmagnetized to pipeline and non-detection status (Fig. 3).
In the diagram, detection agency is made up of probe fixing support 7, probe position-limited rack 9, probe standing screw 10, probe pressuring spring 11, probe 12.Probe fixing support 7 two ends of non-ferromagnetic material arrange two fixed holes, are separately fixed between two magnetization pole shoes 3 by screw, ensure that probe 12 is in the magnetization of mid point the best and the optimum detection position of two magnetization pole shoes.Probe fixing support 7 inner vertical direction arranges sliding guide groove 8, limits within it by probe position-limited rack 9, can only slide up and down along sliding guide groove, can not swing or rotate.The probe position-limited rack 9 of non-ferromagnetic material is in H font, centre is provided with through hole allows a standing screw 10 of popping one's head in pass, probe standing screw 10 upper end is connected with the screw on probe fixing support 7, probe 12 is installed in its lower end, middle cover to be popped one's head in pressuring spring 11, turn probe fixing support and apply downward active force on probe position-limited rack 9, ensure that the probe 12 be arranged on below probe position-limited rack 9 reliably can be fitted in the outer surface of detected pipeline 6.Opening on the downside of probe position-limited rack 9 mates with probe plate shape, limits within it, can only move up and down, can not swing probe 12 or rotate, ensures that probe reliably can be fitted in the outer surface of detected pipeline.
As shown in Figure 5, probe 12 is arc-shaped flaky workpiece that nonmagnetic substance is processed into, its inner arc curvature and detected pipeline cylindrical curvature match to ensure to pop one's head in detected pipeline of fitting along pipe circumference direction, arcuately rectangle groove is processed in direction from the middle part of arc-shaped flaky workpiece outer arc, channel bottom and inner arcuate surface leave 1mm left and right thickness, arrange detecting element in groove.
Tunnel magneto resistance bridge array 13 is at the inner detecting element arranged of probe.The present embodiment specifically exactly forms Wheatstone bridge by tunnel magneto resistance (TMR), then form bridge array by multiple Wheatstone bridge.
Tunnel magneto resistance element is subject to variation magnetic field effect, and resistance (conductance) linear change can occur.The Wheatstone bridge that tunnel magneto resistance is formed owing to being subject to the effect in pipeline outer wall spatial defects magnetic field and unbalance, unbalance degree and defect magnetic field also linear.The power supply that the Wheatstone bridge that is made up of tunnel magneto resistance in addition consumes is extremely faint, and therefore, the probe that tunnel magneto resistance electric bridge is formed has highly sensitive, good linearity and merit than other magnetic sensitive probes and damages the low and thermally-stabilised feature such as good.
As shown in Figure 6, form Wheatstone bridge by 4 tunnel magneto resistance TMR1 ~ 4, during pipe surface zero defect magnetic field, bridge balance, output is zero; During pipe surface defectiveness magnetic field, electric bridge is unbalance, exports flaw indication.
The action principle of the present embodiment:
The boundary conditions of stationary magnetic field
In the separating surface both sides of two kinds of different magnetic medium, the normal direction of magnetic induction intensity and magnetic intensity and tangential component, meet following boundary conditions:
(1) normal component of magnetic induction intensity is continuous, and the normal component of magnetic intensity is discontinuous:
(2) tangential component of magnetic intensity is continuous, and the tangential component of magnetic induction intensity is discontinuous.
In other words, if when entering the border of place defect 14 in the little pipeline of permeability by the steady magnetic field executed outside the magnetizer of the present embodiment from the ferromagnetic pipeline 6 that permeability is large, normal is seriously partial in magnetic field, being refracted out pipeline outer wall space becomes defect magnetic field 15; If when magnetic induction line enters the large ferromagnetic pipeline 6 of permeability from the defect 14 that permeability is little, magnetic induction line substantial deviation normal, converges in tube wall strongly.So just, steady magnetizing field can be applied in pipeline outer wall space to pipeline by magnetizer of the present invention, tunnel magneto resistance bridge array is set between magnetizer simultaneously, detect the defect magnetic field 15 being refracted to pipeline external surface by defect 14.
Using method:
1, to the detected state of pipeline
See Fig. 1: by the close detected pipeline 6 of two pieces of magnetization pole shoes 3 of portable for pressure-bearing industrial pipeline on-line measuring device, two V-arrangement trundles 5 on the downside of it are allowed to be pressed in pipeline external surface, adjustment probe standing screw 10, makes probe 12 and detected pipeline external surface fit.Again two pieces of magnetic short circuited rings 4 moved to the upper end of magnetic conduction handle 1 and fix, the magnetic field of two blocks of permanent magnet 2 couples together by polarity serial fashion magnetizes fully to the tube wall be between two pieces of magnetization pole shoes 3, if existing defects 14 in tube wall, according to the boundary conditions of stationary magnetic field, a part of magnetic field is refracted to pipeline external surface by defect 14, form defect magnetic field 15, tunnel magneto resistance bridge array 13 is set between magnetizer simultaneously and detects.By operator or mechanical device, portable electromagnetic detection is promoted by the whole outer surface of pipeline along pipeline axial or circumference, the result detected reflects the position of defect and the figure of the order of severity by special soft formation, realizes the reliable, convenient of online pressure-bearing industrial pipeline and comprehensively detects.
2, non-detection status
See Fig. 2: when two magnetic short circuited rings 4 are linked in permanent magnet 2 both sides, the magnetic field sent from permanent magnet one pole is directly coupled to another pole by magnetic short circuited ring, only has little magnetic field to be coupled on tube wall, easily can be extracted by detection device and leave pipeline.
The present embodiment has following technical characterstic:
1, permanent magnet and portable magnetic circuit is adopted to form light magnetizer, steady magnetic field magnetization is carried out to pipeline, pipeline external surface can be excited, the defect of any position in inner-walls of duct and wall can be excited again to form defect magnetic field in pipeline external surface space, meet the reliable of on-line industry pipeline and complete detection requirement;
2, do not need to execute power supply magnetic field and any detection Couplant outward, both saved power supply and testing cost, ensure that again testing result is reliable and stable;
3, the sound wave that the steady magnetic field of permanent magnet is not formed by the high pressure steam in online pipeline or current disturbs, and both can detect pipeline component, can implement Site Detection again to the pipeline in on-line operation;
4, many group tunnel magneto resistance electric bridges are adopted to form probe, when there is no defect in pipeline, pipeline external surface zero defect magnetic field, magneto-resistor bridge balance, does not have signal to export; When in pipeline during defectiveness, form defect magnetic field at pipeline external surface, magneto-resistor electric bridge is unbalance, and sensor defectiveness signal exports, and such detection device both along the rapid mobility detect of pipeline external surface, also can stop at any place of pipeline and realize static detection.
5, form the permanent magnetic on-line measuring device of portable pressure-bearing industrial pipeline by permanent magnet and portable magnetic circuit, light small and exquisite, convenient operation, have simultaneously structure simple, be easy to manufacture, the advantage such as operation troubles rate is low, safe and reliable, energy-conserving and environment-protective.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (10)
1. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline, is characterized in that: comprise magnetizable body and detection agency;
Described magnetizable body comprises a magnetic conduction handle (1), two pieces of permanent magnet (2), two pieces of magnetization pole shoes (3); The two ends of described magnetic conduction handle are connected with the upper end of two blocks of permanent magnet respectively, and the lower end of the permanent magnet of every block is connected with one piece of magnetization pole shoe again;
Described detection agency comprises probe (12) and tunnel magneto resistance bridge array (13); The two ends of described probe are connected with the inner side of the magnetization pole shoe (3) being positioned at magnetic conduction handle two ends, and probe is positioned at the neutral position of two pieces of magnetization pole shoes; The outer wall of the detected pipeline of probe bottom laminating, the inner chamber of probe is equipped with tunnel magneto resistance bridge array (13).
2. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, it is characterized in that: the polarity being positioned at two blocks of described permanent magnet at magnetic conduction handle (1) two ends connects by the form of series connection, make the magnetic of two blocks of permanent magnet be that superposition strengthens, realize the abundant magnetization to tube wall.
3. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, is characterized in that: described magnetizable body also comprises the magnetic short circuited ring (4) with magnetic property; Two described magnetic short circuited rings distinguish the two ends of ring set in magnetic conduction handle (1);
Magnetic short circuited ring can along magnetic conduction handle slide downward and be enclosed within be positioned at magnetic conduction handle two ends permanent magnet (2) around, the magnetic field that permanent magnet one pole is sent is directly coupled to another pole of permanent magnet by magnetic short circuited ring; Or
Magnetic short circuited ring also can along magnetic conduction handle upward sliding and away from being positioned at the permanent magnet (2) at magnetic conduction handle two ends around, another pole of permanent magnet is coupled to by tested tube wall in the magnetic field that permanent magnet one pole is sent, and realizes the magnetization to tested tube wall.
4. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, is characterized in that: described magnetizable body also comprises roller (5); Roller described in two groups is separately fixed at the outside of magnetization pole shoe (3), makes to magnetize pole shoe (3) and keeps with detected pipeline the distance that set and can along pipe surface axially or circumferentially to move.
5. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, is characterized in that: described detection agency also comprises fixed support (7), probe position-limited rack (9), probe standing screw (10), probe pressuring spring (11); The both sides of described probe position-limited rack (9) are moved in the chute of fixed support (7) both sides, bottom, described probe standing screw (10) top with the screw on fixed support (7) to be threaded, bottom is connected with the probe (12) be positioned at below position-limited rack of popping one's head in through the through hole on probe position-limited rack, described probe pressuring spring (11) to be contained between fixed support and probe position-limited rack and to be enclosed within and pop one's head on standing screw, pressuring spring of popping one's head in will pop one's head in (12) oppress and be fitted in the outer wall of detected pipeline.
6. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, is characterized in that: the cross section of described magnetic conduction handle (1) and the cross section of two pieces of permanent magnet (2) are the circle with same diameter.
7. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 1, is characterized in that: described tunnel magneto resistance bridge array (13) is the many groups electric bridge be made up of the tunnel magneto resistance of many.
8. the online permanent magnetic detection device of portable pressure-bearing industrial pipeline according to claim 7, is characterized in that: described electric bridge is Wheatstone bridge.
9. the online permanent magnetic detection method of pressure-bearing industrial pipeline, is characterized in that comprising the following steps:
(1) steady magnetic field is applied to detected pipeline, make to be uniformly distributed in the detected tube wall of magnetic field between this magnetized region;
(2) if the detected inner and outer walls of pipeline between magnetized region or inside have any defect to exist, a part of magnetic field is refracted to pipeline external surface space-title defect magnetic field by defect;
(3) probe be made up of tunnel magneto resistance bridge array is set at detected pipeline external surface, probe detects defect magnetic field and by microprocessor and the position of display device display defect and the figure of the order of severity, realizes the reliable, convenient of online pressure-bearing industrial pipeline and comprehensively detect.
10. the online electromechanical detection method of pressure-bearing industrial pipeline according to claim 9, is characterized in that: described step (3) comprises the following steps:
(4) form tunnel magneto resistance bridge array by many tunnel magneto resistances, during pipe surface zero defect magnetic field, each electric bridge all balances, and output is zero; During pipe surface defectiveness magnetic field, always there is electric bridge unbalance, export flaw indication;
(5) tunnel magneto resistance bridge array is placed in probe bore, converts defect magnetic field to flaw indication; Presence or absence and the menace level of defect is represented by the amplitude of flaw indication;
(6) by position and the order of severity of micro-process and display device display defect directly perceived, realize the convenience to online pressure-bearing industrial pipeline, detect reliably.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106949382A (en) * | 2017-04-21 | 2017-07-14 | 上海山南勘测设计有限公司 | A kind of device and its application method for being used to detect pipeline liquid leakage |
| CN107702649A (en) * | 2017-11-24 | 2018-02-16 | 中国工程物理研究院流体物理研究所 | A kind of hall probe high precision position acquisition device |
| CN111537439A (en) * | 2020-05-09 | 2020-08-14 | 广东省特种设备检测研究院 | System and method for automatically identifying and evaluating defects of pressure-bearing equipment |
| CN111579635A (en) * | 2020-06-24 | 2020-08-25 | 智云安科技(北京)有限公司 | Floated magnetic leakage detection module |
| CN113588775A (en) * | 2020-04-30 | 2021-11-02 | 新疆金风科技股份有限公司 | Detection device |
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| CN106949382A (en) * | 2017-04-21 | 2017-07-14 | 上海山南勘测设计有限公司 | A kind of device and its application method for being used to detect pipeline liquid leakage |
| CN106949382B (en) * | 2017-04-21 | 2023-09-12 | 上海山南勘测设计有限公司 | Device for detecting liquid leakage of pipeline and application method thereof |
| CN107702649A (en) * | 2017-11-24 | 2018-02-16 | 中国工程物理研究院流体物理研究所 | A kind of hall probe high precision position acquisition device |
| CN107702649B (en) * | 2017-11-24 | 2024-03-15 | 中国工程物理研究院流体物理研究所 | Hall probe high-precision position acquisition device |
| CN113588775A (en) * | 2020-04-30 | 2021-11-02 | 新疆金风科技股份有限公司 | Detection device |
| CN111537439A (en) * | 2020-05-09 | 2020-08-14 | 广东省特种设备检测研究院 | System and method for automatically identifying and evaluating defects of pressure-bearing equipment |
| CN111579635A (en) * | 2020-06-24 | 2020-08-25 | 智云安科技(北京)有限公司 | Floated magnetic leakage detection module |
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| CN105546359B (en) | 2017-10-03 |
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