CN103175499A - Portable measuring instrument for partial etch pit depth of pipe - Google Patents
Portable measuring instrument for partial etch pit depth of pipe Download PDFInfo
- Publication number
- CN103175499A CN103175499A CN2013100908252A CN201310090825A CN103175499A CN 103175499 A CN103175499 A CN 103175499A CN 2013100908252 A CN2013100908252 A CN 2013100908252A CN 201310090825 A CN201310090825 A CN 201310090825A CN 103175499 A CN103175499 A CN 103175499A
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- Prior art keywords
- depth
- displacement transducer
- etch pit
- probe
- pit
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 239000000523 sample Substances 0.000 claims abstract description 28
- 230000007797 corrosion Effects 0.000 claims description 28
- 238000005260 corrosion Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a portable measuring instrument for partial etch pit depth of a pipe, and belongs to depth measuring devices. The portable measuring instrument is mainly suitable for being used for quickly measuring the depth of an etch pit at a site after a metal pipe is partially corroded. A displacement sensor serves as the main instrument, and the etch pit depth is directly read from a data display instrument which is connected with the sensor, so that the portable measuring instrument has the advantages of high precision, zero artificial reading error, and reliable usage, and the like. A ball is additionally arranged in the end part of a probe; and a spring arranged in the sensor enables the ball to be clung to the bottom surface, the probe can smoothly move at the bottom of the etch pit as being matched with a lead screw arranged on a support, and therefore, the convenience is provided for measuring the depth of each part of the etch pit. The sensor is arranged on the support, and elongated magnets are embedded into supporting legs of the support, so that the high stability in measuring can be ensured. The portable measuring instrument for the partial etch pit depth of the pipe is easy to use and convenient to carry, can be used for directly measuring the depth of the etch pit in the external wall of a long pipe section as well as the depth of the etch pit in the internal wall of an opened pipe, and also can be used for measuring the depth of the etch pit in a plate.
Description
Technical field
The present invention is a kind of portable surveying instrument for the tubing local corrosion pit degree of depth, belongs to depth measurement device.After mainly being applicable to metal pipe material and local corrosion occurring, the pit degree of depth is carried out on-site rapid measurement.
Background technology
Metal material tends to corrosion under the chemistry of environment around and electrochemical action under arms in process, wherein, although the metal loss amount that local corrosion causes is little, often the heavy corrosion due to regional area causes unexpected corrosion accident, brings great harm to production.
For the evaluation of metal corrosion resisting property, often estimate serviceable life with corrosion rate.For general corrosion, can adopt corrosion weight loss to draw divided by corroded area, but for local corrosion, need to calculate local corrosion speed by measuring the pit degree of depth, estimate the time that perforation occurs with local corrosion speed.
In the tubing use procedure, serious local corrosion often occurs, etch state is the most common with aperture and tableland shape.After tubing is carried out the scene dissection, need to measure to assess the severe local corrosion degree to the pit degree of depth.This measuring instrument is invented design for solving tubing local corrosion pit degree of depth on-site rapid measurement.
For satisfying the requirement of in-site measurement, at first this measuring instrument will stably be fixed on tube wall, therefore on the feet of support, strong magnets is installed, and is adsorbed on tube wall, to guarantee its stability; Secondly, for determining the minimum point of pit, need probe smoothly to move along axis direction, therefore ball is installed on probe and is controlled it by leading screw and move, sensor includes spring assurance ball and constantly is close to the bottom surface, can find easily like this reference point (pit top) and pit lowermost end.At present, also do not have this can be at the scene directly to whole section outer pipe wall and cut the instrument that the pipe material inner wall pit degree of depth is measured open.Such as application number (200820078829.3) instrument for measuring corrosion pit depth is only effective to the sample pit of specific dimensions, can not be used for the measurement of the on-the-spot pipeline section pit degree of depth.
Summary of the invention
The object of the present invention is to provide and a kind ofly directly carry out the mode of in-site measurement for the large section pipe material inner wall local corrosion pit degree of depth of cutting open, also can be used for homogeneous tube outer wall pit and the shorter inner pit degree of depth of homogeneous tube are measured.
Technical scheme of the present invention is: a kind of portable surveying instrument of the tubing local corrosion pit degree of depth
Comprise fixed magnet, support, displacement transducer, digital display meter, lasso, leading screw, handle, probe, ball and guide rail;
wherein, on the upper surface of the described support of described digital display meter fixed installation, the embedded strip magnet of the supported on both sides pin of described support, be used for stably fixation measuring instrument on pipe material inner wall or outer wall, the crossbeam of described support is provided with guide rail, described displacement transducer is arranged on described guide rail, described displacement transducer is connected with described digital display meter by wire, lasso on described displacement transducer and described leading screw is affixed, described leading screw and described handle are affixed, realize that by turning handle described displacement transducer moves horizontally on described support, the horizontal throw of displacement transducer is 0-100mm, described probe top is embedded in the bottom of described displacement transducer, the embedded described ball in described probe lower end, described ball diameter is 0.5mm.
Further, the junction between described displacement transducer and described probe is provided with spring, and when displacement transducer moved horizontally, the lower end ball can be close to pit bottom rolling, keeps good contact constantly.
Further, the diameter of described spring is 4mm.
Further, the range of described displacement transducer is 0-20mm, and precision is 0.001mm.
Further, described probe material is stainless steel, be shaped as coniform, the upper end stiff end diameter 4mm of described probe, the lower end fades to fine acicular.
The present invention has the following advantages:
Simple in structure, easy to carry, workable.
As a kind of instrument of the measure field tubing pit degree of depth, directly reading, easy to use.
Estimate tubing serviceable life by the local corrosion pit degree of depth, have very strong practicality and science.
Description of drawings
Fig. 1 is the structural representation of a kind of portable surveying instrument for the tubing local corrosion pit degree of depth of the present invention.
Fig. 2 partial structurtes schematic diagram of the present invention.
Fig. 3 is the pit form.
In figure:
1. fixed magnet, 2 supports, 3 displacement transducers, 4.Digital display meter, 5 lassos, 6 leading screws, 7 handles, 8 probes, 9 balls, 10 springs, 11. guide rails.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
As shown in Figure 1 and Figure 2, the portable surveying instrument of a kind of tubing local corrosion of the present invention pit degree of depth comprises fixed magnet 1, support 2, displacement transducer 3, digital display meter 4, lasso 5, leading screw 6, handle 7, probe 8, ball 9 and guide rail 11;
wherein, on the upper surface of the described digital display meter 4 described supports 2 of fixed installation, the embedded strip magnet 1 of the supported on both sides pin of described support 2, be used for stably fixation measuring instrument on pipe material inner wall or outer wall, the beam side wall of described support 2 is provided with guide rail 11, described displacement transducer 3 is arranged on described guide rail 11, described displacement transducer 3 is connected with described digital display meter 4 by wire, described displacement transducer 3 is affixed with the lasso 5 on described leading screw 6, described leading screw 6 is affixed with described handle 7, realize that by turning handle 7 described displacement transducer 3 moves horizontally on described support 2, the horizontal throw of displacement transducer 3 is 0-100mm, described probe (8) top is embedded in the bottom of described displacement transducer 3, junction between displacement transducer 3 and described probe 8 is provided with the spring 10 that diameter is 4mm, described probe (8) material is stainless steel, be shaped as coniform, the upper end stiff end diameter 4mm of probe 8, the lower end fades to fine acicular, embedded diameter is the ball 9 of 0.5mm.The range of displacement transducer 3 is 0-20mm, and precision is 0.001mm.
Specific embodiment
After being salvaged, certain subsea petroleum pipeline carries out the depth survey of local corrosion pit, to determine the severe local corrosion degree.Long 10 meters of former salvaging pipeline section is cut into the segment of 1.2-1.5 rice with sawing machine with it, and adopts water to cut vertically and cut open, visible 4 o'clock of pipeline inwall to 8 o'clock direction be distributed with a large amount of pits.Specifically, the pit form comprises dark semicircle, shallow semicircle, large tableland shape, point-like and sheet, and wherein dark semicircle, shallow semicircle and large tableland shape pit are main measuring objects.Certain pipeline section pit form is illustrated in fig. 3 shown below.
But the sample of length can not adopt original laboratory means to measure the pit degree of depth like this, will expend a large amount of manpower and materials if each pit is taken a sample separately to measure again, and is extremely inconvenient.Adopt the present invention easily to address this problem.
Concrete measuring process is as follows:
1. measuring instrument is placed on pit to be measured top, guarantees the throw line of probe 8 by the pit bottom, the fixed magnet 1 of support lower end can guarantee to be fixed well.
2. swinging handle 7 can realize that displacement transducer 3 moves horizontally, and when probe is in the pit edge, the registration zeroing is designated as reference point.
3. continue swinging handle 7, displacement transducer 3 is moved horizontally to the pit bottom, and due to the effect of spring 10, the ball 9 of probe 8 lower ends is close to the pit basal sliding all the time, and registration constantly changes.
4. when registration reaches maximal value, stop swinging handle 7, this moment, reading was the pit degree of depth.
5. take reading, continue to survey next pit degree of depth.
Can find out by above example, this invention can realize scene, the mass of pit depth survey, greatly simplifies pit depth survey process, guarantees simultaneously accuracy and the science measured.
Claims (5)
1. the portable surveying instrument of a tubing local corrosion pit degree of depth, is characterized in that comprising fixed magnet (1), support (2), displacement transducer (3), digital display meter (4), lasso (5), leading screw (6), handle (7), probe (8), ball (9) and guide rail (11);
wherein, described digital display meter (4) fixedly mounts on the upper surface of described support (2), the embedded strip magnet of the supported on both sides pin of described support (2) (1), be used for stably fixation measuring instrument on pipe material inner wall or outer wall, the crossbeam of described support (2) is provided with guide rail (11), described displacement transducer (3) is arranged on described guide rail (11), described displacement transducer (3) is connected with described digital display meter (4) by wire, described displacement transducer (3) is affixed with the lasso (5) on described leading screw (6), described leading screw (6) is affixed with described handle (7), realize that by turning handle (7) described displacement transducer (3) moves horizontally on described support (2), the horizontal throw of displacement transducer (3) is 0-100mm, described probe (8) top is embedded in the bottom of described displacement transducer (3), the embedded described ball in described probe (8) lower end (9), described ball (9) diameter is 0.5mm.
2. the portable surveying instrument of the tubing local corrosion pit degree of depth according to claim 1, it is characterized in that the junction between described displacement transducer (3) and described probe (8) is provided with spring (10), when displacement transducer (3) when moving horizontally, lower end ball (9) can be close to pit bottom rolling, keeps good contact constantly.
3. the portable surveying instrument of the tubing local corrosion pit degree of depth as claimed in claim 2, the diameter of described spring (10) is 4mm.
4. pit depth calibrator according to claim 1 and 2, the range that it is characterized in that described displacement transducer (3) is 0-20mm, precision is 0.001mm.
5. pit depth calibrator according to claim 1 and 2, is characterized in that described probe (8) material is stainless steel, be shaped as coniform, the upper end stiff end diameter 4mm of probe (8), the lower end fades to fine acicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090825.2A CN103175499B (en) | 2013-03-20 | 2013-03-20 | A kind of portable surveying instrument of the tubing local corrosion pit degree of depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090825.2A CN103175499B (en) | 2013-03-20 | 2013-03-20 | A kind of portable surveying instrument of the tubing local corrosion pit degree of depth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103175499A true CN103175499A (en) | 2013-06-26 |
| CN103175499B CN103175499B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310090825.2A Expired - Fee Related CN103175499B (en) | 2013-03-20 | 2013-03-20 | A kind of portable surveying instrument of the tubing local corrosion pit degree of depth |
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| CN (1) | CN103175499B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466384A (en) * | 2015-12-11 | 2016-04-06 | 广东长盈精密技术有限公司 | Probe and CNC processing detection method |
| CN105784803A (en) * | 2016-03-07 | 2016-07-20 | 杨雁泽 | Clamp used for measuring stainless steel pipe outer surface critical point corrosion temperature |
| CN106324199A (en) * | 2016-08-31 | 2017-01-11 | 马亚南 | Automatic detection and alarming equipment, system and method for decaying degree of Chinese style beam |
| 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 |
| CN111879211A (en) * | 2020-07-28 | 2020-11-03 | 中国石油天然气集团有限公司 | Single-side measuring device and method for depth of corrosion pit on surface of steel pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1967826A2 (en) * | 2001-01-30 | 2008-09-10 | Renishaw plc | A capacitance type measurement probe |
| CN201508149U (en) * | 2009-10-22 | 2010-06-16 | 常州市三利精机有限公司 | Oversized gantry-type three-coordinate measuring machine |
| CN202452960U (en) * | 2011-11-26 | 2012-09-26 | 内蒙古北方重工业集团有限公司 | Full-automatic ultrasonic thickness measurement device |
-
2013
- 2013-03-20 CN CN201310090825.2A patent/CN103175499B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1967826A2 (en) * | 2001-01-30 | 2008-09-10 | Renishaw plc | A capacitance type measurement probe |
| CN201508149U (en) * | 2009-10-22 | 2010-06-16 | 常州市三利精机有限公司 | Oversized gantry-type three-coordinate measuring machine |
| CN202452960U (en) * | 2011-11-26 | 2012-09-26 | 内蒙古北方重工业集团有限公司 | Full-automatic ultrasonic thickness measurement device |
Non-Patent Citations (1)
| Title |
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| 舒建伟等: "一种分辨力达纳弧度量级的角位移传感新方法", 《光学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466384A (en) * | 2015-12-11 | 2016-04-06 | 广东长盈精密技术有限公司 | Probe and CNC processing detection method |
| CN105466384B (en) * | 2015-12-11 | 2017-10-27 | 广东长盈精密技术有限公司 | Probe and CNC processing detection methods |
| CN105784803A (en) * | 2016-03-07 | 2016-07-20 | 杨雁泽 | Clamp used for measuring stainless steel pipe outer surface critical point corrosion temperature |
| CN105784803B (en) * | 2016-03-07 | 2018-04-03 | 杨雁泽 | A kind of fixture for being used to measure stainless steel tube outer surface critical pitting temperature |
| CN106324199A (en) * | 2016-08-31 | 2017-01-11 | 马亚南 | Automatic detection and alarming equipment, system and method for decaying degree of Chinese style beam |
| 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 |
| CN111879211A (en) * | 2020-07-28 | 2020-11-03 | 中国石油天然气集团有限公司 | Single-side measuring device and method for depth of corrosion pit on surface of steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103175499B (en) | 2016-05-11 |
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Granted publication date: 20160511 |