CN104236416A - Pipeline defect measuring device - Google Patents
Pipeline defect measuring device Download PDFInfo
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- CN104236416A CN104236416A CN201410452741.3A CN201410452741A CN104236416A CN 104236416 A CN104236416 A CN 104236416A CN 201410452741 A CN201410452741 A CN 201410452741A CN 104236416 A CN104236416 A CN 104236416A
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Abstract
The invention relates to a pipeline defect measuring device which comprises an annular frame and measuring scales. Measuring scale open holes centrosymmetric about the circle center are evenly distributed in the circumferential direction of the annular frame, the open hole sections of the measuring scale open holes are in a T shape, and inlets and outlets of the measuring scales are formed in the wide rectangular parts. Each measuring scale comprises a main scale body and an auxiliary scale body, sleeves are adopted as bodies of the main scale bodies, the auxiliary scale bodies are arranged in the sleeves, and the size of the inner walls of the sleeves is matched with that of the outer surfaces of the auxiliary scale bodies. Millimeter scales from small to large are sequentially arranged on the sleeves of the main scale bodies from outside to inside. Open holes for fastening the auxiliary scale bodies through bolts are formed in the sleeves. Conical probes are arranged at the sharp ends of the auxiliary scale bodies. Through the device, frequent and repeated measurement is not needed, a pipe fitting does not need to be rotated, and the overall condition of the section defect can be obtained at a time.
Description
Technical field
The present invention relates to the measurement mechanism of the defects such as a kind of mechanical pipeline ovality and surperficial incomplete property, and corresponding using method, for the defect situation of testing pipes structure easily.
Background technology
As the Typical Representative of engineering pipeline structure, subsea pipeline is the lifeline in deep-sea oil gas engineering, is responsible for the important task that oil gas transports.External environment condition residing for deep-water subsea pipeline is significantly different from Other Engineering structure, and environmental activity has the feature of high temperature, high pressure, inside and outside corrosion.The principal mode that this feature causes deep-water subsea Pipeline Failure destruction is section rings flexing conquassation upwards.Research shows, cross section defect is the deciding factor (more than build magnitude, the full-scale crushing test of deep-water subsea pipeline and numerical simulation, 2012) of bringing out the conquassation of subsea pipeline flexing.In engineering reality, be difficult to ensure that each cross section of pipeline is complete, strict annulus, the existence of defect causes pipeline failure critical load often far below theoretical expectation values.As can be seen here, the accurate measurement of oceanographic engineering pipe fitting defect situation, for the duty of the prediction performance of stand-by pipe fitting and assessment, control in-service pipeline, has great significance.
The defect of pipeline comprises the incomplete property of ovality and surface two kinds of situations, wherein: ovality refers to the overall deformation tendency that cross section shortens at a direction length of side, other direction, normally by manufacturing, alignment error or be subject to that the strong load in a direction local causes, and most probably pipeline during one's term of military service in pressure or external pressure effect under constantly aggravate, finally cause structural failure; The incomplete property in surface refers to the local damage such as pit, wall thickness reduction in a certain region, cross section, is usually collided by junk or the factor such as corrosion causes, and is the key factor of the pipeline generation failure damage causing the military service phase longer.
Defect of pipeline simple measurement method the most frequently used is at present, adopts calliper and ruler to coordinate, and gets some measuring points measure tube outer diameter by calliper card, and using the maximal value that records as long axis length, minimum value is as minor axis length.Although this method is simple, precision is too low, and the personal error based on operator is difficult to control.More accurate measuring method can be divided into photoelectric type measuring and Mechanical measurement two class substantially.Wherein, utilize photoelectric method to measure the device more complicated of pipe fitting ovality, cost is higher, is not easy to carry out Quick Measurement in pipe production or laying scene.Utilize mechanical means to measure the measurement device of pipe fitting ovality, there is following problem:
First, the more difficult control of personal error factor of result, in method as described in practical novel C N 202158829 U " a kind of Portable steel pipe ovality measuring instrument " and utility model CN 201780083 U " a kind of survey instrument measuring diameter of steel tube extreme value and ovality ", all need survey crew by measurement mechanism along pipe fitting outer wall rotating 360 degrees, be difficult to ensure that it measures track cross section and pipe end cross-section parallel, and not easily realize by 360 degree of rotations of pipe fitting actual display case restriction measurement mechanism.
Second, determination for major cross-sectional axis and minor axis extreme value in measuring process is accurate not, in method as described in practical novel C N 202158829 U " a kind of Portable steel pipe ovality measuring instrument " and utility model CN 201449240 U " steel pipe ovality, bending degree detecting device ", survey crew needs the maxima and minima artificially determining indication scale in measuring process, and its measurement mechanism cannot realize real time record measurement data, therefore measuring accuracy is difficult to ensure.
3rd, lack ovalization distortion and local the considering of incomplete property, as patent of invention 102937404 A " a kind of device of measuring channel ovality " of openly substantive examination, although its end points can be calibrated in tube wall surface position while measurement pipe fitting long axis length, but because the actual configuration of pipeline is made up of jointly the defect such as ovality and pit, therefore the actual long and short shaft length recorded of this method may due to the existence of pit out of true.
Summary of the invention
The object of the invention is to the deficiency overcome in prior art, for the version feature of pipeline, provide a kind of can at the device producing and lay on-the-spot measuring channel cross section defect situation easily and accurately.Adopt device of the present invention, survey crew, without the need to carrying out repeatedly repeated measurement, also without the need to rotating pipe fitting, utilizes the disposable overall condition obtaining cross section defect of this Mechanical measurement device, thus calculate its ovality and surperficial incomplete implementations, realize the quality inspection to deep-water subsea pipeline.Technical scheme of the present invention is as follows:
A kind of defect of pipeline measurement mechanism, comprise annulus framework (1), dip stick body, wherein, annulus framework (1) is formed by connecting by the dismountable semicircular ring of two lobes, the circumference of annulus framework is evenly distributed with about the centrosymmetric dip stick perforate (9) in the center of circle, the perforate cross sectional shape of dip stick perforate (9) is " T " font, wider rectangle part is the import and export of dip stick body, narrower rectangle part is the reserved fluting of reading, and annulus framework (1) is provided with the perforate (9) for being fastened by bolts dip stick body.
Each dip stick body comprises main scale (2) and secondary chi (3), and the main body of main scale (2) is sleeve, and the outside surface of inner wall size and secondary chi (3) that secondary chi (3) is positioned at sleeve inner sleeve cooperatively interacts; From the millimeter unit scales had successively outside to inside from small to large on main scale sleeve; Sleeve is provided with the perforate (10) for being fastened by bolts secondary chi (3);
The tip of secondary chi (3) is the probe of taper, for by determining position with the contact of tested pipe fitting (11) outer wall; The secondary chi (3) of dip stick body is equivalent to the vernier of vernier caliper, the setting of its high scale and counting principle identical with the vernier of vernier caliper.
Preferably, the tip probe of secondary chi (3) scribbles ink marks, thus sensing point can be left on pipeline outer wall; The external radius of annulus framework (1) is manufactured into integer centimetre value, and the reading that annulus framework closes on the dip stick perforate (9) of dip stick body reserves fluting place, inwardly has centimetre unit scales from small to large successively from excircle; The manufacture position of secondary chi (3) probe, the distance to secondary chi zero point is integer centimetre length.
The present invention is directed to pipeline configuration (particularly the deformation failure feature of deep-water subsea pipe fitting), provide the devices and methods therefor of a kind of measuring channel cross section general defect situation, compared with prior art have the following advantages:
(1) as a kind of mechanical measurement mechanism, its technical construction is simple, be easy to carry, the more convenient operation such as assembling, dismounting, and manufacturing cost is lower, is applicable to measure easily in pipe production, laying and erecting stage;
(2) compare with existing Mechanical measurement device, in the precision of spot measurement, the present invention can ensure that measurement result is accurate to 0.01mm, consider the comprehensive effect of the incomplete property of the distortion of overall ovality and local, surface simultaneously, and measurement result is retained by fixing and read, and can reduce the artificial interference of gauger to result to greatest extent;
(3) compare with existing Mechanical measurement device, in measurement range, result can be recorded to the some discrete points on the circle of 360 degree, pipe fitting cross section simultaneously, and then the general defect situation in pipe fitting cross section is detected and assessed;
(4) the present invention can realize the unification of measurement precision and economic serviceability preferably, for predicting final failure mode, the failure position of pipe fitting and destroying critical load important in inhibiting, according to measuring calibration result, person skilled can judge whether pipe fitting is applicable to application or takes the corresponding strengthening measure of necessity.
Accompanying drawing explanation
Fig. 1 is the three dimensional top axonometric drawing that this device has assembled rear entirety;
Fig. 2 is that the three-dimensional that this device has assembled rear entirety looks up axonometric drawing;
Fig. 3 is the three-dimensional shaft mapping of an annulus framework lobe body;
Fig. 4 (a) coarse adjustment to the floor map of zero timer, the partial enlarged drawing of (b) dip stick mechanism scale part;
The floor map of timer is measured in Fig. 5 (a) fine tuning, the close-up schematic view of (b) major and minor chi reading part.
Number in the figure illustrates: 1 annulus chassis body; 2 main dip sticks; 3 secondary dip sticks; 4 main fastening bolt groups; 5 secondary fastening bolt groups; 6 hinges; 7 framework lobe body coupling bolts; 8 frameworks connect otic placode; 9 dip stick body perforates; 10 kingbolt group perforates; 11 pipe fittings to be measured.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described:
As depicted in figs. 1 and 2, this device is specifically made up of an annulus framework, some hoops centrosymmetric dip stick body (comprising main scale 2 and secondary chi 3) and trip bolt group.
Annulus framework is made up of the dismountable semicircular ring of two lobes, and as shown in Figure 3, two semicircular ring lobe bodies 1 are fixed by hinge 6 and the bolt 7 connected on otic placode 8 or are dismantled.The circumference of annulus leaves about the centrosymmetric some dip stick perforates 9 in the center of circle, perforate cross sectional shape is " T " font, and top wider square portion is the import and export of dip stick body, and rectangular portion narrower is on the lower divided into the reserved fluting of reading.The annulus frame upper surface vertical with the perforate of dip stick body have about the centrosymmetric bolt aperture 10 in the center of circle, its circumferential position and dip stick body perforate 9 one_to_one corresponding, for the connection of bolted annulus framework 1 with dip stick body.The external radius of annulus framework is manufactured into integer centimetre value, is set to Rcm, and framework closes on the fluting place of dip stick body 3 perforate, inwardly has centimetre unit scales from small to large successively from excircle, R+1, R+2,
Before measurement, dip stick mechanism 2 and 3 is assemblied on annulus framework 1, as shown in Fig. 4 (a).Dip stick mechanism to be centrosymmetric distribution about the center of circle of framework, and concrete number can be determined according to the requirement of measuring accuracy.Each dip stick mechanism forms by main scale 2 and secondary chi 3 two parts.Main scale mechanism 2 is square sleeve, the fluting that the promising reading in below is reserved, main scale sleeve 2 can do relative sliding in the dip stick body perforate 9 on annulus framework 1, need can to utilize during fixed position the fastening connection with annulus framework 1 of kingbolt group 4, bolt aperture is left in position outer on main scale body, for the connection of fastening main scale 2 with secondary chi 3, from the millimeter unit scales had successively outside to inside from small to large on main scale sleeve 2; Fu Chi mechanism 3 is square entity, the most advanced and sophisticated probe for taper, for determining position with tested pipe fitting 11 wall contacts, relative sliding can do in main scale sleeve 2 inside in whole mechanism, need can to utilize during fixed position the fastening connection with main scale sleeve of secondary bolt group 5, the manufacture position of secondary chi tip probe, the distance to secondary chi zero point is integer centimetre length, is set to Lcm.
During measurement, first need to carry out coarse adjustment to the scale of the scale on framework 1 and dip stick 2,3.The zero point of the major and minor chi mechanism 2,3 of dip stick mechanism is aimed at, by secondary fastening bolt group 5, major and minor chi mechanism 2 and 3 is fastenedly connected; Then according to the approximate size of pipe fitting to be measured, a certain integer centimeter scale on main scale sleeve 2 is alignd with the integer centimeter scale on annulus framework 1, ensure each secondary chi tip probe not with the wall contacts of tested pipe fitting 11; Main scale sleeve 2 and annulus outside framework 1 are fastenedly connected by main fastening bolt group 4, same process is all done by all dip stick mechanisms in device circumference again, and the scale value of each main scale alignment is consistent, as shown in Fig. 4 (b).If the centimeter scale on main scale centimeter scale and annulus framework is Scm (main scale scale deducts annulus framework scale) to scale difference thereafter, then now the distance in the secondary chi tip probe auto levelizer center of circle is (R+S-L) cm.
After each dip stick completes coarse adjustment, start to carry out fine tuning one by one to dip stick.Two of measurement mechanism lobe bodies are buckled on pipeline sectional position to be measured, and with the bolt 7 be connected on otic placode 8, two of device lobe bodies are fixed together by hinge 6; Unclamp secondary fastening bolt group 5 afterwards, make relative movement to occur between main scale 2 and secondary chi 3; Move inward secondary chi 3 until itself and tested pipe fitting 11 outer wall come in contact; The tip probe of secondary chi 3 scribbles ink marks, thus sensing point can be left on pipeline outer wall; Tip probe can not inwardly continue mobile, again major and minor chi mechanism 2,3 is fastenedly connected by secondary fastening bolt group 5.Successively all dip stick mechanisms in circumference are as above operated, after all completing, unclamp the bolt 7 connected on otic placode 8, two of device lobe bodies 1 are disassembled from tested pipe fitting 11, reading is carried out to the data that each dip stick records, as shown in Figure 5.The using method of reading process and vernier caliper is similar.Scale total length on secondary chi 3 is 99mm, and have 100 scales, each scale is 0.99mm.Suppose that the reading recorded by certain major-minor chi is lmm (numerical value of l can be accurate to 0.01), then the distance (i.e. the distance in the secondary chi tip probe auto levelizer center of circle) in the measuring point pipe fitting outer wall auto levelizer center of circle of this position is [10 (R+S-L)-l] cm.
The final distance that each dip stick records, is actually the radial coordinate value of pipe fitting outer wall each point under the polar coordinate system being initial point with the device center of circle, and the hoop coordinate of each point is unique fixing for device.Although the center of circle of device not necessarily overlaps with the center of circle of tested pipe fitting, but the position of outer wall each point can be determined according to polar coordinates, further various discrete point is smoothly connected, the overall configuration of pipe fitting outer wall can be obtained, thus analyze the defect situation such as the incomplete property of its ovality and surface.Dip stick in annulus framework circumference is more, and the discrete data that can obtain is more, and depicting of pipe fitting outer wall overall configuration is more accurate.
Claims (3)
1. a defect of pipeline measurement mechanism, comprise annulus framework (1), dip stick body, wherein, annulus framework (1) is formed by connecting by the dismountable semicircular ring of two lobes, the circumference of annulus framework is evenly distributed with about the centrosymmetric dip stick perforate (9) in the center of circle, the perforate cross sectional shape of dip stick perforate (9) is " T " font, wider rectangle part is the import and export of dip stick body, narrower rectangle part is the reserved fluting of reading, and annulus framework (1) is provided with the perforate (9) for being fastened by bolts dip stick body.
Each dip stick body comprises main scale (2) and secondary chi (3), and the main body of main scale (2) is sleeve, and the outside surface of inner wall size and secondary chi (3) that secondary chi (3) is positioned at sleeve inner sleeve cooperatively interacts; From the millimeter unit scales had successively outside to inside from small to large on main scale sleeve; Sleeve is provided with the perforate (10) for being fastened by bolts secondary chi (3);
The tip of secondary chi (3) is the probe of taper, for by determining position with the contact of tested pipe fitting (11) outer wall; The secondary chi (3) of dip stick body is equivalent to the vernier of vernier caliper, the setting of its high scale and counting principle identical with the vernier of vernier caliper.
2. defect of pipeline measurement mechanism according to claim 1, is characterized in that, the tip probe of secondary chi (3) scribbles ink marks, thus can leave sensing point on pipeline outer wall.
3. defect of pipeline measurement mechanism according to claim 1, it is characterized in that, the external radius of annulus framework (1) is manufactured into integer centimetre value, the reading that annulus framework closes on the dip stick perforate (9) of dip stick body reserves fluting place, inwardly has centimetre unit scales from small to large successively from excircle; The manufacture position of secondary chi (3) probe, the distance to secondary chi zero point is integer centimetre length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410452741.3A CN104236416A (en) | 2014-09-05 | 2014-09-05 | Pipeline defect measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410452741.3A CN104236416A (en) | 2014-09-05 | 2014-09-05 | Pipeline defect measuring device |
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| CN104236416A true CN104236416A (en) | 2014-12-24 |
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| CN201410452741.3A Pending CN104236416A (en) | 2014-09-05 | 2014-09-05 | Pipeline defect measuring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547596A (en) * | 2015-12-08 | 2016-05-04 | 重庆泰山电缆有限公司 | Sealing cap for detecting sealing performance of cable metal sheath |
| CN105890562A (en) * | 2016-07-01 | 2016-08-24 | 成都市龙泉通惠实业有限责任公司 | Piston body measuring machine |
| CN106197202A (en) * | 2016-08-31 | 2016-12-07 | 南京佳业检测工程有限公司 | Special-shaped part detection device |
| CN108362193A (en) * | 2018-02-18 | 2018-08-03 | 张凉英 | A kind of pipe fitting measurement straightening all-in-one machine |
| CN110057274A (en) * | 2018-01-17 | 2019-07-26 | 兰州兰石重型装备股份有限公司 | Pressure container cylinder internal diameter and ovality detecting tool and its application method |
| CN110081792A (en) * | 2019-05-17 | 2019-08-02 | 山东胜利钢管有限公司 | Measurement pipe end is in a pout or the method for tube wall radial missing |
| CN112517671A (en) * | 2020-11-17 | 2021-03-19 | 蚌埠凯盛工程技术有限公司 | Online detection and correction device and detection and correction method for long shaft of production line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547596A (en) * | 2015-12-08 | 2016-05-04 | 重庆泰山电缆有限公司 | Sealing cap for detecting sealing performance of cable metal sheath |
| CN105890562A (en) * | 2016-07-01 | 2016-08-24 | 成都市龙泉通惠实业有限责任公司 | Piston body measuring machine |
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| CN106197202A (en) * | 2016-08-31 | 2016-12-07 | 南京佳业检测工程有限公司 | Special-shaped part detection device |
| CN110057274A (en) * | 2018-01-17 | 2019-07-26 | 兰州兰石重型装备股份有限公司 | Pressure container cylinder internal diameter and ovality detecting tool and its application method |
| CN108362193A (en) * | 2018-02-18 | 2018-08-03 | 张凉英 | A kind of pipe fitting measurement straightening all-in-one machine |
| CN108362193B (en) * | 2018-02-18 | 2019-11-22 | 徐州诚凯知识产权服务有限公司 | A kind of pipe fitting measurement straightening all-in-one machine |
| CN110081792A (en) * | 2019-05-17 | 2019-08-02 | 山东胜利钢管有限公司 | Measurement pipe end is in a pout or the method for tube wall radial missing |
| CN112517671A (en) * | 2020-11-17 | 2021-03-19 | 蚌埠凯盛工程技术有限公司 | Online detection and correction device and detection and correction method for long shaft of production line |
| CN112517671B (en) * | 2020-11-17 | 2022-09-16 | 蚌埠凯盛工程技术有限公司 | Online detection and correction device and detection and correction method for long shaft of production line |
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