CN105548345B - A kind of oil field compression fracture elbow defect detecting device and the method for inspection - Google Patents
A kind of oil field compression fracture elbow defect detecting device and the method for inspection Download PDFInfo
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- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
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Abstract
The invention discloses a kind of oil field compression fracture elbow defect detecting device and the method for inspection, which includes motor, gear driving pair, detection platform, fixed platform, mobile sliding block, Hall element and magnetizing coil；Wherein, gear driving pair includes active driving member and slave drive part, active driving member is mounted on the output shaft of motor, motor is fixed in detection platform, it is connected together through a hinge between detection platform and fixed platform and at slave drive part center, and slave drive part is fixed on the stationary platform close to fixed platform side；Magnetizing coil is sleeved on Hall element periphery, and the two integral installation is on the inside of Hall element fixed ring；One end of mobile sliding block is sleeved in detection platform, and can be free to slide along detection platform, and the other end of mobile sliding block is hinged and connected on the outside of Hall element fixed ring；When test, Hall element is sleeved on elbow to be detected.
Description
Technical field：
The present invention relates to elbow fault detection method and detection device fields, and in particular to a kind of oil field compression fracture elbow defect
Detection device and the method for inspection.
Background technology：
In oil field compression fracture work progress, fracturing fluid is finally applied in oil well by fracturing unit truck and various connecting lines.
Wherein, elbow largely uses in pipeline, and effect is to change flow direction, meets live pressing crack construction requirement.Due to elbow
The pressure of interior fracturing fluid is very high, reaches as high as 100MPa or so, and contain Korrosionsmedium, has to the inside and outside wall of elbow
Serious erosion effect (the erosion effect that general outer wall is subject to is more serious), in the weakness zone of elbow performance, easy tos produce
The defects of crackle, and then fracture failure occurs, it causes casualties and property loss.Therefore, during elbow use, to curved
Head defect carries out periodic inspection, and is disposed in time to the defect of discovery, it appears particularly necessary.
Chinese patent document 201220592201.1 discloses a kind of Novel elbow detection device, which can be to elbow
Carry out the water pressure test, by pressure sensor, detect the pressure value variation in elbow, to judge elbow bearing capacity whether
It meets the requirements.But the patent, which is not directed to, to be detected and evaluates to elbow defect.Chinese patent document 201310683517.0
A kind of channel bend Pulsed eddy current testing device is disclosed, which passes through pulse eddy current sensor, signal processing circuit and meter
Calculation machine system, handles elbow defect information, to detect the defect on elbow surface.But the device uses vortex
Pulse signal, different from magnetic flux leakage defect inspection essence, EDDY CURRENT object is mainly to surface defect, for elbow inside
Defect can hardly detect, and the patent is not related to the tracking to defect and processing.
Invention content：
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of oil field compression fracture elbow defect detecting device
And the method for inspection, inside and the surface defect of bend pipe can be preferably detected, detection efficiency is higher, and classifies to defect
Evaluation and processing.
In order to achieve the above object, the present invention adopts the following technical scheme that realize：
A kind of oil field compression fracture elbow fault detection device, including motor, gear driving pair, detection platform, fixed platform, shifting
Movable slider, Hall element and magnetizing coil；Wherein, gear driving pair includes active driving member and slave drive part, is actively driven
Part is mounted on the output shaft of motor, and motor is fixed in detection platform, between detection platform and fixed platform and driven biography
Moving part is connected together through a hinge at center, and slave drive part is fixed on the stationary platform close to fixed platform side；Magnetizing coil
It is sleeved on Hall element periphery, and the two integral installation is on the inside of Hall element fixed ring；
The one end for moving sliding block is sleeved in detection platform, and can be free to slide along detection platform, moves the another of sliding block
On one end is hinged and connected on the outside of Hall element fixed ring；When test, Hall element is sleeved on elbow to be detected.
The present invention, which further improves, to be, slave drive part is imperfect gear, and the notch end of the imperfect gear is solid
Determine on the stationary platform.
The present invention, which further improves, to be, between detection platform and fixed platform by be fixed in detection platform the
One connects bearing and fixed the second connects bearing on the stationary platform are connected together through a hinge.
The present invention, which further improves, to be, spill sliding slot is offered in detection platform, and one end of mobile sliding block is set as
With the matched convex sliding block of spill sliding slot, the convex sliding block of mobile sliding block one end can in detection platform in spill sliding slot from
By sliding.
The present invention, which further improves, to be, Hall element fixed ring includes Hall element top fixed ring and Hall element
Lower part fixed ring, wherein Hall element top fixed ring one end, Hall element lower part fixed ring one end and mobile sliding block it is another
One end is connected together through a hinge；The Hall element top fixed ring other end and the Hall element lower part fixed ring other end are connected by bolt
It is connected together.
The present invention, which further improves, to be, further includes the control sample for most being compared with elbow to be detected, this is right
Than offering interior cutting and outer cutting respectively on the inner and outer wall of sample.
The present invention, which further improves, to be, interior cutting and 5% wall thickness that outer groove depth is control sample.
A kind of detection method of oil field compression fracture elbow fault detection device, includes the following steps：
1) elbow control sample, starter motor, motor and gear drive side effect are placed, detection platform rotation is driven,
To drive mobile sliding block to rotate and sliding, and then drive Hall element rotation；Magnetizing coil is powered, and generates Circumferential field,
Hall element can detect magnetic leakage signal；Detection platform turns to the other end from elbow one end, at this point, in elbow control sample
Artificial defect signal by connect computer magnetic leakage signal is converted into voltage signal using Hall effect principle；
Its signal conversion formula is：
In formula：VHPotential difference；RHHall coefficient；I- current strength；B- magnetic induction intensity；D- plate thickness；
Voltage signal size shows as flaw echo height size on computers, shows on computer；It such as cannot be clear
Display defect echo then readjusts probe current and voltage, velocity of rotation, until artificial defect echo can clearly be shown
Image, scan sensitivity, which has been checked, at this time finishes；
2) elbow control sample is removed, elbow to be detected in placement, starter motor scans elbow tube body, the end of scan
Afterwards, the position of record shortcoming signal；As do not found shortcoming signal, then it is judged to qualification, can continue to use.
The present invention, which further improves, to be, further comprising the steps of：
If 3) shortcoming signal is more than the signal value demarcated in elbow control sample, which sentences useless or takes other
Quarantine measures, it is proposed that be not continuing with；If the echo that lacks is no more than artificial defect echo height, step 4) operation is carried out；
4) shortcoming is detected again using conventional Ultrasound shear wave detection probe and instrument etc.；In elbow control sample
It is checked, determines the echo height and detection sensitivity of control sample；After check, artificial lack is no more than to echo height
The shortcoming for falling into echo height is detected, and such as determines that shortcoming is face crack, then is determined as unqualified, sentence at useless or isolation
Reason, it is proposed that be not continuing with, if determining shortcoming is is mingled with, stomata, then can continue to use, carry out step 5) and operate；
5) shortcoming echo is more than artificial defect echo 50%, registers the number of elbow, the position of shortcoming, length, depth are done
Record easy to remember is taken the circumstances into consideration to consider to shorten detection cycle, be paid close attention to when detecting next time to search；Echo lack artificial
It between flaw echo 20% to 50%, is recorded, and carries out the emphasis inspection at the position in next detection cycle, checked scarce
Owing no has extension；Echo lack less than artificial defect echo 20%, not records.
Compared with prior art, elbow defect detecting device of the present invention can preferably solve the defect inspection of elbow
Survey problem.Using Magnetic Flux Leakage Inspecting principle and Hall element, detection device provided by the invention can form an annular leakage field inspection
Ring is surveyed, by detecting the rotation of ring, the inner and outer surfaces defect of entire elbow can more quickly, be comprehensively detected, to entire curved
100% all standing is realized in head section, easily facilitates the dangerous point for grasping entire elbow.
The method of inspection of the present invention proposes a kind of defect handling method, can to the unqualified elbow of discovery carry out and
When handle, to it is not exceeded but have the elbow of shortcoming carry out classification processing, tracking, understand the spread scenarios of shortcoming, it is curved to avoid
The generation of head failure conditions, has preferable using effect and economic value.
Description of the drawings：
Fig. 1 is Hall effect schematic diagram, wherein Fig. 1 (a) is electron institute by Lorentz force schematic diagram, and Fig. 1 (b) is positive electricity
Lorentz force schematic diagram suffered by lotus.
Fig. 2 is the schematic diagram of elbow defect detecting device.
Fig. 3 is the A-A direction views of Fig. 1.
Fig. 4 is the B-B direction view of Fig. 1.
Fig. 5 is that Hall element fixed ring connect left view with mobile sliding block.
Fig. 6 is that Hall element fixed ring is hinged schematic diagram with mobile sliding block.
Fig. 7 is detection platform right view.
Fig. 8 is elbow control sample schematic diagram, wherein Fig. 8 (b) is the C-C direction views of Fig. 8 (a).
In figure：1 is elbow, and 2 be motor, and 3 be detection platform, and 4 be imperfect gear, and 5 be the first connects bearing, and 6 be solid
Fixed platform, 7 be the second connects bearing, and 8 be mobile sliding block, and 9 be Hall element top fixed ring, and 10 be bolt, and 11 be the first hinge
Fitting, 12 be the second articulation piece, and 13 be Hall element lower part fixed ring, and 14 be control sample, and 15 be Hall element, and 16 be magnetization
Coil.
Specific implementation mode：
The present invention is described in further details below in conjunction with the accompanying drawings.One is done to the structure of elbow defect detecting device first
A explanation.
As shown in Figure 2 and Figure 7, a kind of oil field compression fracture elbow fault detection device of the present invention, including motor 2, imperfect tooth
Wheel 4, detection platform 3, fixed platform 6, mobile sliding block 8, Hall element 15 and magnetizing coil 16；Wherein, motor 2 is fixed on detection
On platform 3, detection platform 3 has sliding slot part across on elbow 1, and detection platform 3 is fixedly connected with the first connects bearing 5, no
4 center of complete gear wheel and the second connects bearing 7 are connected by the first articulation piece 11, this imperfect 4 right-hand component of wheel are fixed on
On fixed platform 6, fixed platform 6 is fixedly connected with the second connects bearing 7.
As shown in Figure 3 and Figure 4, detection platform 3 has spill sliding slot, and moving sliding block 8 has convex sliding block, moves the convex of sliding block 8
Shape sliding block can be free to slide in the spill sliding slot of detection platform 3.
As shown in Figure 5 and Figure 6, Hall element top fixed ring 9 and Hall element lower part fixed ring 13 are hinged by second
Part 12 and mobile sliding block 8 connect, and magnetizing coil 16 is fixed on Hall element top fixed ring 9 and Hall element lower part fixed ring 13
On, Hall element top fixed ring 9 and Hall element lower part fixed ring 13 are fixed by bolt 10.
As shown in figure 8, there are interior cutting 17 and outer cutting 18 (5% wall thickness depth, length in elbow control sample outer arc side
20mm, allowable tolerance ± 2.0mm, cutting type is rectangle, and in practice process, elbow outer arc side is elbow most weak spot, is easy
It causes wall thickness reduction and cracks defect, therefore artificial defect is made in outer arc side).
A kind of oil field compression fracture elbow fault detection method of the present invention, including following operating procedure：
Step 1 places elbow control sample 14, and bolt 10 tightens, starter motor 2, and motor 2 and partial gear 4 are made
With, drive detection platform 3 to rotate, to drive mobile sliding block 8 to rotate and sliding, and then drive Hall element top fixed ring 9
It is rotated with Hall element lower part fixed ring 13.Magnetizing coil 16 is powered, and generates Circumferential field, and Hall element 15 can detect
To magnetic leakage signal, (defect and its direction that can be detected here have certain relationship, and defect direction and magnetic direction are in 90 °, detection effect
Fruit is best, and defect direction and magnetic direction are less than 20 °, and Effect on Detecting is poor).Detection platform 3 at the uniform velocity, slowly, steadily from curved
First end turns to the other end, at this point, artificial defect (5% wall thickness depth cutting) signal in elbow control sample 14 passes through company
Computer and processing software are connect, using Hall effect principle (as shown in Figure 1), magnetic leakage signal is converted into voltage signal, is believed
Number conversion formula is：
In formula：VHPotential difference；RHHall coefficient；I- current strength；B- magnetic induction intensity；D- plate thickness；
Voltage signal size shows as flaw echo height size on computers, shows on computer.It such as cannot be clear
Display defect image then readjusts probe current and voltage, velocity of rotation, until artificial defect image (one can clearly be shown
As flaw indication height be the 80% of entire display height), scan sensitivity, which has been checked, at this time finishes.
Step 2 opens bolt 10, removes elbow control sample, elbow is detected in placement.Starter motor 2, scanning are curved
First 1 tube body after the end of scan, records the position of all shortcoming signals in processing software, and is marked on elbow.As not
It was found that shortcoming signal, then be judged to qualification, can be continuing with.
Step 3 is equal to or more than artificial defect echo height (such as 80% display height) if any shortcoming echo height,
It can be determined as defect, then the elbow is unqualified, need to carry out sentencing and give up or take other quarantine measures, it is proposed that not be continuing with.
If the echo that lacks is no more than artificial defect echo height, step 4 operation is carried out.
Step 4 detects shortcoming using conventional Ultrasound shear wave detection probe and instrument etc. again.It is compared in elbow
It is checked on sample 14, determines the echo height and detection sensitivity of control sample.After check, echo height is not surpassed
The shortcoming for crossing artificial flaw echo height is detected, and is such as determined that shortcoming is face crack, is then determined as unqualified, sentence useless
Or other quarantine measures, it is proposed that be not continuing with.Such as it is that other types are lacked, then can be continuing with, carry out step 5 operation.Its
In, conventional ultrasound detection system includes：Supersonic reflectoscope, transverse wave double-bevel detector, probe line, couplant etc..
Step 5, shortcoming echo is more than artificial defect echo 50%, should in time, accurately register the number of elbow, is lacked
The information such as deficient position, length, depth, make a record to search, and take the circumstances into consideration to consider to shorten detection cycle, when detecting next time
It is paid close attention to.Echo lack between artificial defect echo 20% to 50%, also should give record, and in detection week next time
The emphasis inspection that the position is carried out in phase, checking that shortcoming is no has extension.Echo lack less than artificial defect echo 20%, it can be with
Not record.
Claims (9)
1. a kind of oil field compression fracture elbow fault detection device, which is characterized in that including motor (2), gear driving pair, detection platform
(3), fixed platform (6), mobile sliding block (8), Hall element (15) and magnetizing coil (16)；Wherein, gear driving pair includes master
Dynamic driving member and slave drive part, active driving member are mounted on the output shaft of motor (2), and motor (2) is fixed on detection platform
(3) it on, is connected together through a hinge between detection platform (3) and fixed platform (6) and at slave drive part center, and slave drive
Part is fixed on close to fixed platform (6) side in fixed platform (6)；Magnetizing coil (16) is sleeved on Hall element (15) periphery
On, and the two integral installation is on the inside of Hall element fixed ring；
One end of mobile sliding block (8) is sleeved in detection platform (3), and can be free to slide along detection platform (3), mobile sliding block
(8) on the other end is hinged and connected on the outside of Hall element fixed ring；When test, Hall element (15) is sleeved on elbow to be detected
(1) on.
2. a kind of oil field compression fracture elbow fault detection device according to claim 1, which is characterized in that slave drive part is
The notch end of imperfect gear (4), the imperfect gear (4) is fixed in fixed platform (6).
3. a kind of oil field compression fracture elbow fault detection device according to claim 1, which is characterized in that detection platform (3)
By the first connects bearing (5) for being fixed in detection platform (3) and it is fixed on fixed platform between fixed platform (6)
(6) the second connects bearing (7) on is connected together through a hinge.
4. a kind of oil field compression fracture elbow fault detection device according to claim 1, which is characterized in that detection platform (3)
On offer spill sliding slot, one end of mobile sliding block (8) is set as and the matched convex sliding block of spill sliding slot, mobile sliding block
(8) the convex sliding block of one end can be free to slide in spill sliding slot in detection platform (3).
5. a kind of oil field compression fracture elbow fault detection device according to claim 1, which is characterized in that Hall element is fixed
Ring includes Hall element top fixed ring (9) and Hall element lower part fixed ring (13), wherein Hall element top fixed ring
(9) other end of one end, Hall element lower part fixed ring (13) one end and mobile sliding block (8) is connected together through a hinge；Hall member
Part top fixed ring (9) other end and Hall element lower part fixed ring (13) other end are linked together by bolt (10).
6. a kind of oil field compression fracture elbow fault detection device according to claim 1, which is characterized in that further include for
The control sample (14) that elbow (1) to be detected compares, offer respectively on the inner and outer wall of the control sample (14) in
Cutting (17) and outer cutting (18).
7. a kind of oil field compression fracture elbow fault detection device according to claim 6, which is characterized in that interior cutting (17) and
Outer cutting (18) depth is 5% wall thickness of control sample (14).
8. a kind of detection method of oil field compression fracture elbow fault detection device described in claim 1, which is characterized in that including with
Lower step：
1) elbow control sample (14), starter motor (2), motor (2) and gear drive side effect are placed, detection platform is driven
(3) it rotates, to drive mobile sliding block (8) to rotate and sliding, and then drives Hall element rotation；Magnetizing coil (16) is powered,
And Circumferential field is generated, Hall element (15) can detect magnetic leakage signal；Detection platform (3) turns to another from elbow one end
End, at this point, the artificial defect signal in control sample (14) believes leakage field using Hall effect principle by connecting computer
Number it is converted into voltage signal；
Its signal conversion formula is：
In formula：VHPotential difference；RHHall coefficient；I- current strength；B- magnetic induction intensity；D- plate thickness；
Voltage signal size shows as flaw echo height size on computers, shows on computer；Such as cannot clearly it show
Flaw echo image then readjusts probe current and voltage, velocity of rotation, until artificial defect reflectogram can clearly be shown
Picture, scan sensitivity, which has been checked, at this time finishes；
2) control sample (14) is removed, elbow (1) to be detected in placement, starter motor (2) scans elbow (1) tube body, scanning
After, the position of record shortcoming signal；As do not found shortcoming signal, then it is judged to qualification, can continue to use.
9. detection method according to claim 8, which is characterized in that further comprising the steps of：
If 3) shortcoming signal is more than the signal value demarcated in control sample (14), which sentences useless or takes other
Quarantine measures, it is proposed that be not continuing with；If the echo that lacks is no more than artificial defect echo height, step 4) operation is carried out；
4) shortcoming is detected again using conventional Ultrasound shear wave detection probe and instrument；School is carried out in control sample (14)
Core determines the echo height and detection sensitivity of control sample；After check, artificial defect echo is no more than to echo height
The shortcoming of height is detected, and such as determines that shortcoming is face crack, then is determined as unqualified, sentence useless or isolation processing, is built
View is not continuing with, and if determining shortcoming is is mingled with, stomata, then be can continue to use, is carried out step 5) and operate；
5) shortcoming echo is more than artificial defect echo 50%, registers the number of elbow, the position of shortcoming, length, depth are done easy to remember
Record is taken the circumstances into consideration to consider to shorten detection cycle, be paid close attention to when detecting next time to search；Echo lack in artificial defect
It between echo 20% to 50%, is recorded, and carries out the emphasis inspection at the position in next detection cycle, check that shortcoming is no
There is extension；Echo lack less than artificial defect echo 20%, not records.
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| CN201510886278.8A CN105548345B (en) | 2015-12-04 | 2015-12-04 | A kind of oil field compression fracture elbow defect detecting device and the method for inspection |
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| CN107917953B (en) * | 2017-11-03 | 2021-07-02 | 中国石油天然气集团公司 | Method for inspecting movable part of fracturing elbow |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203479751U (en) * | 2013-09-29 | 2014-03-12 | 国家电网公司 | Eddy current probe for detecting austenitic stainless steel pipe elbow |
| CN103712548A (en) * | 2013-12-14 | 2014-04-09 | 华中科技大学 | Pipe elbow pulsed eddy current detection device |
| CN105044201A (en) * | 2015-07-17 | 2015-11-11 | 国家电网公司 | Saddle-shaped open vortex detection device and vortex detection method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57186165A (en) * | 1981-05-13 | 1982-11-16 | Hitachi Ltd | Guide rail device for guiding body running around piping |
| JP2007132667A (en) * | 2005-11-08 | 2007-05-31 | Hitachi Eng Co Ltd | Non-destructive inspection device of piping welded part |
-
2015
- 2015-12-04 CN CN201510886278.8A patent/CN105548345B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203479751U (en) * | 2013-09-29 | 2014-03-12 | 国家电网公司 | Eddy current probe for detecting austenitic stainless steel pipe elbow |
| CN103712548A (en) * | 2013-12-14 | 2014-04-09 | 华中科技大学 | Pipe elbow pulsed eddy current detection device |
| CN105044201A (en) * | 2015-07-17 | 2015-11-11 | 国家电网公司 | Saddle-shaped open vortex detection device and vortex detection method |
Non-Patent Citations (1)
| Title |
|---|
| 管道弯头漏磁无损检测仪的研究;程顺峰 等;《无损检测》;20040229;第26卷(第2期);第59-61页 * |
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