CN206523466U - A kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline - Google Patents
A kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline Download PDFInfo
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- CN206523466U CN206523466U CN201720071414.2U CN201720071414U CN206523466U CN 206523466 U CN206523466 U CN 206523466U CN 201720071414 U CN201720071414 U CN 201720071414U CN 206523466 U CN206523466 U CN 206523466U
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Abstract
The utility model is related to a kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline.It is made up of measurement apparatus and evaluation system.Wherein measurement apparatus is made up of main support, axial chi, circumferential chi and radial probe.Main support has identical radius of curvature with institute's test tube road, can be brought into close contact pipeline outer wall.Axial chi, circumferential chi and radial probe can be respectively along pipeline axial direction, circumference and radial translations.Capacitive displacement transducer is mounted between main support slide rail and axial chi, between axial chi slide rail and circumferential chi, between circumferential chi sleeve and radial probe bar, the relative displacement between all parts can be measured.This device can measure the detailed threedimensional coordinate of pipeline outer wall etch pit, and be drawn and data processing by evaluation system, and assessment of remaining strength is carried out to pipeline corrosion default.Pipe installing, maintenance and excavation site are may be directly applied to, there is Real-Time Evaluation after measurement accuracy height, measurement.
Description
Technical field
The utility model is related to defect of pipeline measurement and Integrity Assessment technical field, more particularly to a kind of for outside pipeline
Corrosion default dimensional measurement and the method and apparatus of assessment of remaining strength.
Background technology
Pipeline is a kind of safer and economic means of transportation of transfer oil natural gas resource.With petroleum gas
Development and utilization, in-service pipeline quantity is continuously increased.But the pipeline that early stage builds has been on active service for many years, and its surface is subject to sternly
The corrosiveness of weight.Pipeline steel corrosion makes wall thickness local reduction, and tube wall bearing capacity reduces, therefore to ensure that pipeline can continue peace
Row for the national games, it is necessary to regularly detection defect of pipeline and assessment of remaining strength is carried out to it, carried out according to evaluation result planned
Maintenance and repair.
At present, the known defect inspection method that is related to has interior detection and outer detection.Wherein interior detection method such as leakage field
Interior detection, ultrasound examination are that internal detector is placed in pipeline, are moved under the pressure of pumped (conveying) medium along pipeline, are examined simultaneously
The defect information in test tube road, then detection data are exported, utilize the evaluation software of specialty to carry out assessment of remaining strength again.It is this
Method carries out pipe detection with evaluating two processes respectively, and can only detect that the depth capacity of defect and maximum axial are long
Degree, it is difficult to which the pattern of defect is described in detail.Pipeline added salts are generally used for the detection ruptured to anticorrosive coat, equally
The detailed dimensions of defect can not be detected.At present using more defect of pipeline evaluation method have ASME B31G evaluation equations,
PRORRC evaluation equations and the evaluation equations of BS 7910, the maximum that corrosion default is only needed to when being evaluated using these equations are deep
Spend and axis projection length, therefore foregoing interior detection is often used cooperatively with these equations.But their evaluation result all compared with
It is conservative, causes pipeline unnecessary maintenance or replacing, add economic input.ASME B31G-2009 pipeline residual intensities
Above-mentioned evaluation equation is classified as one-level evaluation level by evaluation criterion, orientates RSTRENG effective area methods as two-level appraisement level,
It is evaluated conservative and significantly reduced compared with one-level evaluation, but needs the detailed corruption of defect of pipeline during application RSTRENG significant surface area method
Pattern is lost, and foregoing various detection methods are difficult to meet this accuracy of detection.
Utility model content
It is difficult to detailed measurements corrosion default pattern, general evaluation equation evaluation result for existing detection technique excessively to protect
Two processes mutually isolated present situation is kept, detects and evaluates, it is remaining that the utility model provides a kind of outer corrosion default of oil-gas pipeline
Ionization meter is filled.Pipeline corrosion default detection is combined by this method with evaluation, and realization is synchronously completed, to the sky of defect key point
Between coordinate be described in detail, RSTRENG significant surface area method is encapsulated in supporting evaluation system, it is adaptable to pipeline line walking, open
Dig onsite application.
The utility model solves the technical scheme that its technical problem used：
Measurement apparatus, including main support, axial chi, circumferential chi and radial probe composition；Main support both sides set one respectively
Road slide rail, axial chi is slidably arranged on main support slide rail；Axial chi inner hollow, the both sides of axial chi hollow wall respectively have one
Bar arcuation slide rail, circumferential chi is slidably arranged on arcuation slide rail；A sleeve is fixed on circumferential chi, radial probe passes through sleeve.
Described main support is flexure plane, and main support has identical radius of curvature with institute's test tube road, main support slide rail
Cross sectional shape is T-shaped, and respectively there is leader at main support two ends.
Described axial chi is in dome-shaped, and the center of circle is overlapped with tested pipeline axis；Respectively there are a T-shaped pawl, T in axial chi two ends
Shape pawl matches with main support slide rail.
Described circumferential chi movement locus is by the center of circle with surveying the circular arc that conduit axis is overlapped.
Described radial probe one end is more sharp, is made up of hard metal；Radial probe on circumferential chi relative to moving down
Dynamic, motion track is overlapped with the radial direction of tested pipeline.
Described measurement apparatus is provided with three pairs of capacitive displacement transducers altogether；Fixed grid, axle wherein are installed on main support slide rail
Moving grid is installed on to the two ends T-shaped pawl of chi；Installed on the arc-shaped slide rail of axial chi and install dynamic on fixed grid, circumferential chi both sides fin
Grid；Circumferential chi sleeve interior surface installs fixed grid, and moving grid is installed on radial probe surface；When the part for installing moving grid is fixed relative to installing
When the part of grid has relative displacement, displacement will be converted into digital data transmission to computer by capacitor grid transducer.
The utility model evaluation method comprises the steps：Measurement apparatus is fitted on pipeline, enables measurement apparatus
The outer corrosion default of pipeline is completely covered；Mobile axial direction chi and circumferential chi are downward by radial probe to the key point position of etch pit
Press, probe locating tip is contacted with defect point bottom, press the coordinate value that navigation button gathers the measurement point；The coordinate of measurement point
Data are delivered in evaluation system by data line, and user numbers the point；Treat that the whole key points in defect bottom have been measured
Bi Hou, system will draw the longitudinal sectional drawing of defect, and calculate according to RSTRENG significant surface area method the residual intensity of this defect；
According to residual intensity value and pipeline maximum allowable operating pressure（MAOP）Compare, provide maintenance opinion.
The utility model includes measurement apparatus and evaluation system two parts are constituted.Wherein measurement apparatus is used to measure outside pipeline
The space coordinate of some key points in wall erosion defect, and computer is passed data to by transmission line.Evaluation system root
The longitudinal sectional drawing of defect is drawn according to these coordinate values, the residual intensity of defect is then calculated according to RSTRENG significant surfaces area method,
Provide pipe-line maintenance and maintenance opinion.Specific advantageous effect is as follows：
1st, defect inspection and assessment of remaining strength are integrated into a whole, two processes is carried out simultaneously, improved
Evaluation efficiency.
2nd, measurement apparatus is made up of the measuring scale in three directions of space cylindrical coordinate, can measure outer surface of tube wall arbitrfary point
Space coordinate.
3rd, capacitive displacement transducer is installed between each measuring scale so that reading, calibration are more efficient and convenient.
4th, there is data transmission link connection between measurement apparatus and evaluation software, measurement result can be shown in meter in real time
On calculation machine screen, after being measured, software provides evaluation result and suggestion in time, and reference is provided for pipe-line maintenance maintenance.
Brief description of the drawings
Fig. 1 is package unit connection of the present utility model and layout drawing.
Fig. 2 is the three-dimensional structure diagram of measurement apparatus in the utility model.
Fig. 3 is the structure chart of axial chi in the utility model.
Fig. 4 is the slide block structure figure being made up of circumferential chi and radial probe in the utility model.
Fig. 5 is the actual pipeline corrosion default longitudinal sectional drawing that evaluation software is drawn.
Device is configured in figure：1st, tested pipeline；2nd, the outer corrosion default of tube wall；3rd, measurement apparatus；4th, data line；5、
Computer；6th, main support；7th, axial chi；8th, circumferential chi；9th, handle；10th, main support slide rail；11st, arc-shaped slide rail；12nd, T-shaped pawl；
13rd, navigation button；14th, radial probe；15th, sleeve；16th, probe locating tip;A, etch pit.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model.
Embodiment
As Figure 1-4, the outer corrosion default Estimate Method for Residual Strength of oil-gas pipeline and device are by measurement apparatus 3 and calculating
Machine 5 is constituted.Assessment of remaining strength system is arranged on computer 5, and measurement apparatus 3 is connected with computer 5 by data line 4
Connect.When carrying out assessment of remaining strength to corrosion default outside pipeline, measurement apparatus is fitted on pipeline, enables measurement apparatus complete
The outer corrosion default 2 of all standing pipeline.Mobile axial direction chi 7 and circumferential chi 8 arrive the key point position of etch pit, by radial probe 14 to
Under press, probe locating tip 16 is contacted with defect point bottom, press navigation button 13 gather the measurement point coordinate value.Measurement point
Coordinate data be delivered to by data line 4 in evaluation system, user numbers the point.Treat the whole key points in defect bottom
After measurement is finished, system will draw the longitudinal sectional drawing of defect, and calculate according to RSTRENG significant surface area method the residue of this defect
Intensity.According to residual intensity value and pipeline maximum allowable operating pressure（MAOP）Compare, provide maintenance opinion.
As shown in Figure 2,3, measurement apparatus main support 6 has identical radius of curvature in bending arc-shaped with tested pipeline,
Therefore, it is possible to be fitted in pipeline outer wall face completely.Its size（It is i.e. long and wide）Can have in different model, practical application according to corrosion
The actual size of defect is selected, and main support should be made to be slightly larger than defect.Respectively there is a handle 9 at the two ends of main support 6, facilitate carrying to set
It is standby.Respectively there is a slide rail 10 main support both sides, and section can be assembled together with the T-shaped pawl 12 of axial chi into T-shaped, make axial direction
Chi 7 can be moved axially along pipeline.Axial chi 7 is in circular arch shape, and the center of circle is overlapped with conduit axis, and radius is more than outer diameter tube.
The surface of main support slide rail 10 and the axial T-shaped bottom surface of pawl 12 of chi have been fitted fixed grid and moving grid respectively, constitute a pair of capacitive grating displacement sensings
Device.When axial chi 7 produces relative displacement relative to main support 6, shift value is delivered to calculating by sensor in electrical signal form
Machine, obtains the axial coordinate of measurement point.
As shown in Figure 3,4, the axial inside of chi 7 is hollow structure, and respectively there is one of arc-shaped slide rail 11 both sides, with circumferential 8 liang of chi
Side fin assembling, enables circumferential chi 8 to be moved on axial chi 7, motion track is circular arc, its center of circle and tested pipeline axis
Overlap.Fit respectively fixed grid and moving grid in the side of arc-shaped slide rail 11 and circumferential chi fin side, a pair of capacitive grating displacement sensings of composition
Device, when circumferential chi 8 does circumferential movement relative to axial chi 7, its shift value forms measurement point by sensor passes to computer
Circumferential coordinate.
As shown in figure 4, fixing a sleeve 15 on circumferential chi 8, radial probe 14 is inserted into sleeve, there is light between sleeve
Spring supporting.During nature, under spring force, probe locating tip 16 is above pipeline external surface.When the axial He of chi 7
When circumferential chi 8 is moved to above measurement point, navigation button 13 is pressed downwards, makes radial probe 14 is overall to move down.When probe is fixed
When position point 16 touches etch pit surface, then apply a bigger pressure, trigger the switch of navigation button 13.Now radially visit
Pin 14 is captured relative to the moving displacement of sleeve 15 by the capacitive displacement transducer between them, is opened when navigation button 13 is switched
Dynamic moment, shift value is delivered to computer by transmission line, forms the corrosion depth coordinate of measurement point.
It is further illustrated below using concrete operation method of the present utility model.
Be 457mm, wall thickness 7.9mm to outer diameter tube, certain processed oil pipeline one that maximum allowable operating pressure is 9.5MPa
Locate surface corrosion defect and carry out assessment of remaining strength.The basic parameter of input channel first into evaluation software, then by pipeline
Removing surface is clean, removes the corrosion product in etch pit with steel brush, main support 6 is placed into pipe surface.Mobile axial direction chi 7
With circumferential chi 8, to one jiao of main support, coordinate is set to be zeroed in software.The area that mobile circumference chi does not corrode to pipeline
Domain, presses radial probe, probe locating tip 16 is contacted with pipeline outer wall face, sets depth coordinate to be zeroed in software.So far
It has been ready for the preparation of measurement.Coordinate many places in mobile axial chi, circumferential chi and radial probe, record etch pit below
The coordinate of key point, is completed after measurement work, using the drawing function in software, draws the longitudinal sectional drawing of etch pit, such as Fig. 5
It is shown.Using the Function of Evaluation in software, calculate and obtain the ultimate pressure capacity ability of this defect for 10.99MPa, it is maximum more than pipeline
Allow operating pressure, therefore the maintenance suggestion provided is protected to this defect, prevented further to smear the anticorrosive coats such as pitch
Corrosion, without weld reinforcement plate or the local pipeline section of replacing.
Specifically described above with respect to of the present utility model, be merely to illustrate the utility model and be not limited to this practicality newly
Technical scheme described by type embodiment.It will be understood by those within the art that, still the utility model can be entered
Row modification or equivalent substitution, to reach identical technique effect.As long as satisfaction uses needs, all in protection model of the present utility model
In enclosing.
Claims (6)
1. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline, it is characterized in that including main support, axial chi, circumferential chi
With radial probe composition；Main support both sides set one of slide rail respectively, and axial chi is slidably arranged on main support slide rail；Axial chi
Respectively there is an arcuation slide rail inner hollow, the both sides of axial chi hollow wall, and circumferential chi is slidably arranged on arcuation slide rail；It is circumferential
A sleeve is fixed on chi, radial probe passes through sleeve.
2. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline according to claim 1, it is characterized in that described
Main support be flexure plane, main support and institute's test tube road have identical radius of curvature, and the cross sectional shape of main support slide rail is T
Respectively there is leader at shape, main support two ends.
3. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline according to claim 1, it is characterized in that described
Axial chi be in dome-shaped, the center of circle is overlapped with tested pipeline axis；Respectively there are a T-shaped pawl, T-shaped pawl and main support in axial chi two ends
Slide rail matches.
4. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline according to claim 1, it is characterized in that described
Circumferential chi movement locus by the center of circle with surveying the circular arc that overlaps of conduit axis.
5. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline according to claim 1, it is characterized in that described
Radial probe one end it is more sharp, be made up of hard metal；Radial probe is moved up and down relative to circumferential chi, motion track with
The radial direction of tested pipeline is overlapped.
6. the outer corrosion default residual intensity measurement apparatus of a kind of oil-gas pipeline according to claim 1, it is characterized in that described
Measurement apparatus three pairs of capacitive displacement transducers are installed altogether；Fixed grid, the two ends T-shaped of axial chi are wherein installed on main support slide rail
Moving grid is installed on pawl；Installed on the arc-shaped slide rail of axial chi and moving grid is installed on fixed grid, circumferential chi both sides fin；In circumferential chi sleeve
Fixed grid is installed on surface, and moving grid is installed on radial probe surface；When the part for installing moving grid has relatively relative to the part for installing fixed grid
During displacement, displacement will be converted into digital data transmission to computer by capacitor grid transducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071414.2U CN206523466U (en) | 2017-01-20 | 2017-01-20 | A kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720071414.2U CN206523466U (en) | 2017-01-20 | 2017-01-20 | A kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline |
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| CN206523466U true CN206523466U (en) | 2017-09-26 |
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| CN201720071414.2U Expired - Fee Related CN206523466U (en) | 2017-01-20 | 2017-01-20 | A kind of outer corrosion default residual intensity measurement apparatus of oil-gas pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645316A (en) * | 2017-01-20 | 2017-05-10 | 辽宁石油化工大学 | Oil-gas pipeline external corrosion defect residual intensity measuring device and evaluation method |
| CN109765171A (en) * | 2019-01-15 | 2019-05-17 | 西南石油大学 | A kind of outer detection device of self-action Buried Pipeline |
| CN111141244A (en) * | 2019-12-11 | 2020-05-12 | 岭澳核电有限公司 | Method for evaluating pipeline thinning rate |
-
2017
- 2017-01-20 CN CN201720071414.2U patent/CN206523466U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645316A (en) * | 2017-01-20 | 2017-05-10 | 辽宁石油化工大学 | Oil-gas pipeline external corrosion defect residual intensity measuring device and evaluation method |
| CN109765171A (en) * | 2019-01-15 | 2019-05-17 | 西南石油大学 | A kind of outer detection device of self-action Buried Pipeline |
| CN111141244A (en) * | 2019-12-11 | 2020-05-12 | 岭澳核电有限公司 | Method for evaluating pipeline thinning rate |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170926 Termination date: 20180120 |