CN103439247A - Online corrosion monitoring device for natural gas pipeline - Google Patents
Online corrosion monitoring device for natural gas pipeline Download PDFInfo
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- CN103439247A CN103439247A CN2013103967303A CN201310396730A CN103439247A CN 103439247 A CN103439247 A CN 103439247A CN 2013103967303 A CN2013103967303 A CN 2013103967303A CN 201310396730 A CN201310396730 A CN 201310396730A CN 103439247 A CN103439247 A CN 103439247A
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Abstract
The invention provides an online corrosion monitoring device for a natural gas pipeline. The online corrosion monitoring device comprises a detection pipeline connected to a natural gas pipeline in parallel. The online corrosion monitoring device is characterized in that valves are respectively mounted at the inlet and outlet of the detection pipeline, wherein the middle part of the detection pipeline is connected with a domed cap through a flange, and an electrode array corrosion sensor is mounted in the domed cap. According to the online corrosion monitoring device, the electrode array corrosion sensor is utilized for monitoring the corrosion condition of the natural gas pipeline in real time and particularly monitoring local corrosion conditions, so that the monitoring is convenient and reliable; furthermore, the valves are arranged at two ends of the detection pipeline, a user only need to close the valves at the two sides of the detection pipeline when the online corrosion monitoring device needs to be placed and detached, and therefore a problem that a high-pressure pipeline is inconvenient to monitor is avoided.
Description
technical field:
The present invention relates to a kind of natural gas line on-line corrosion monitoring device, belong to the nondestructive testing technique field.
background technology:
Along with economic fast development, the heavy demand of people to rock gas, recent year has been built a large amount of buried high pressure gas pipelines.A large amount of natural gas lines is embedded in underground, due to soil corrosion, can cause pipe perforation, causes that the seepage of oil, gas, water causes very large loss, and the leakage of combustion gas causes the major accidents such as fire, blast sometimes, even causes casualties.The outer corrosion of buried pipeline is mainly galvanic corrosion, and its concrete form mainly comprises micro-cell corrosion, macro cell corrosion, microbiological corrosion and stray current corrosion etc.Micro-cell corrosion is mainly to be caused by the reasons such as difference that exist between the unevenness of the unevenness of steel pipe metallographic structure, soil microstructure and steel pipe seam and coffin.These reasons are difficult to thoroughly eliminate, but, because these micro cells are random uniform on macroscopic view, etch state is uniform corrosion.Macro cell corrosion comprises the galvanic corrosion caused due to the difference of soil degree and soil constitution difference.Long-distance transport pipes often will be by the soil of the soil of different oxygen level, different salt content, the soil of different temperatures.Cause horizontal oxygen-concentration cell corrosion, salt concentration cell corrosion, thermogalvanic corrosion.When caliber is larger, on the caliber circumference, also may form the oxygen concentration corrosion cell.The anode of macro cell corrosion is relatively fixing and concentrate, and causes strong local corrosion, is the main cause that conduit wiring piercing is revealed, very harmful to pipeline.Microbiological corrosion refers to the galvanic corrosion that the bacterium of some kind in soil is participated in or promotes, causes that the bacterium of buried pipeline corrosion is mainly sulphate reducing bacteria (SRB).SRB obtains energy existence by the reduction to sulfate radical.SRB can be sulfuretted hydrogen by the sulfate conversion in soil, and sulfuretted hydrogen consumes on the one hand steel pipe tubing and generates iron protosulfide, makes on the other hand the pH in soil raise.
summary of the invention:
The objective of the invention is provides a kind of natural gas line on-line corrosion monitoring device for the problem of above-mentioned existence, can carry out online corrosion accurately to natural gas line and detect, and plays the effect of presentiment and preventing.
Above-mentioned purpose realizes by following technical scheme:
Natural gas line on-line corrosion monitoring device, comprise the detection pipeline be connected in parallel on natural gas line, the inflow point of described monitoring pipeline and exit be mounted valve respectively, and described detection pipeline middle part connects stifle by flange, described stifle the inside installing electrodes array corrosion sensor.
Described natural gas line on-line corrosion monitoring device, described monitoring pipeline is comprised of the monitoring straight tube that is welded on two sections straight tubes on described natural gas line, the bend pipe be connected with described straight tube respectively and be connected between bend pipe.
Beneficial effect:
The present invention adopts the corrosion condition of electrod-array corrosion sensor Real-Time Monitoring natural gas line, particularly can monitor the situation that local corrosion occurs, monitor convenient and reliable, and the present invention is provided with valve at the two ends of detecting pipeline, lay at needs, only need to, by the valve closing of both sides, avoid pressure piping to monitor inconvenient problem in detaching equipment.
the accompanying drawing explanation:
Fig. 1 is structural representation of the present invention.
In figure: 1, natural gas line, 2, valve, 3, flange, 4, stifle, 5, the electrod-array corrosion sensor, 6, straight tube, 7, bend pipe, 8, the monitoring straight tube.
embodiment:
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.Should understand following embodiment only is not used in and limits the scope of the invention for the present invention is described.
Embodiment 1:
As shown in Figure 1: natural gas line on-line corrosion monitoring device of the present invention, comprise the detection pipeline be connected in parallel on natural gas line 1, the inflow point of described monitoring pipeline and exit be mounted valve 2 respectively, described detection pipeline middle part connects stifle 4 by flange 3, described stifle the inside installing electrodes array corrosion sensor 5.
Embodiment 2:
The described natural gas line on-line corrosion monitoring of embodiment 1 device, described monitoring pipeline is comprised of the monitoring straight tube 8 that is welded on two sections straight tubes 6 on described natural gas line, the bend pipe 7 be connected with described straight tube respectively and be connected between bend pipe.Described valve is arranged on respectively on described straight tube, and described stifle and described electrod-array corrosion sensor are arranged on described monitoring intuitively.
The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned technological means, also comprises by above technical characterictic and is equal to the technical scheme that replacement forms.Unaccomplished matter of the present invention, belong to those skilled in the art's common practise.
Claims (2)
1. a natural gas line on-line corrosion monitoring device, comprise the detection pipeline be connected in parallel on natural gas line, it is characterized in that: the inflow point of described monitoring pipeline and exit be mounted valve respectively, described detection pipeline middle part connects stifle by flange, described stifle the inside installing electrodes array corrosion sensor.
2. natural gas line on-line corrosion monitoring device according to claim 1, it is characterized in that: described monitoring pipeline is comprised of the monitoring straight tube that is welded on two sections straight tubes on described natural gas line, the bend pipe be connected with described straight tube respectively and be connected between bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103967303A CN103439247A (en) | 2013-09-04 | 2013-09-04 | Online corrosion monitoring device for natural gas pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103967303A CN103439247A (en) | 2013-09-04 | 2013-09-04 | Online corrosion monitoring device for natural gas pipeline |
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| CN103439247A true CN103439247A (en) | 2013-12-11 |
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| CN2013103967303A Pending CN103439247A (en) | 2013-09-04 | 2013-09-04 | Online corrosion monitoring device for natural gas pipeline |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909910A (en) * | 2016-06-24 | 2016-08-31 | 苏州热工研究院有限公司 | On-line rubber lining integrality monitoring system |
| CN105928862A (en) * | 2016-04-19 | 2016-09-07 | 西南石油大学 | Monitoring device and monitoring method for on-line monitoring of corrosion degree of medium injected into gas-injection well |
| CN105953018A (en) * | 2016-06-24 | 2016-09-21 | 苏州热工研究院有限公司 | Rubber-lining equipment corrosion online monitoring and control system |
| CN110486630A (en) * | 2019-08-20 | 2019-11-22 | 西南石油大学 | Natural gas line corrosion default characteristic feature extracting method |
| CN110686165A (en) * | 2019-10-15 | 2020-01-14 | 西南石油大学 | Intelligent natural gas pipeline corrosion monitoring device |
| CN110702599A (en) * | 2019-11-08 | 2020-01-17 | 大连理工大学 | Multi-electrode top corrosion monitoring sensor, top corrosion monitoring experiment system and monitoring method |
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| JP2000171386A (en) * | 1998-12-08 | 2000-06-23 | Hitachi Ltd | Corrosion sensor |
| US20040155670A1 (en) * | 2001-03-27 | 2004-08-12 | Lietai Yang | Sensor array for elctrochemical corrosion monitoring |
| CN201170443Y (en) * | 2008-03-19 | 2008-12-24 | 中国石油天然气股份有限公司 | Auxiliary device for on-line monitoring corrosion of heavy pressure pipeline |
| CN202018416U (en) * | 2011-02-22 | 2011-10-26 | 中国石油集团工程设计有限责任公司 | Novel online corrosion monitoring auxiliary device |
| CN203519468U (en) * | 2013-09-04 | 2014-04-02 | 南京佳业检测工程有限公司 | On-line corrosion monitoring device for natural gas pipeline |
-
2013
- 2013-09-04 CN CN2013103967303A patent/CN103439247A/en active Pending
Patent Citations (5)
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| JP2000171386A (en) * | 1998-12-08 | 2000-06-23 | Hitachi Ltd | Corrosion sensor |
| US20040155670A1 (en) * | 2001-03-27 | 2004-08-12 | Lietai Yang | Sensor array for elctrochemical corrosion monitoring |
| CN201170443Y (en) * | 2008-03-19 | 2008-12-24 | 中国石油天然气股份有限公司 | Auxiliary device for on-line monitoring corrosion of heavy pressure pipeline |
| CN202018416U (en) * | 2011-02-22 | 2011-10-26 | 中国石油集团工程设计有限责任公司 | Novel online corrosion monitoring auxiliary device |
| CN203519468U (en) * | 2013-09-04 | 2014-04-02 | 南京佳业检测工程有限公司 | On-line corrosion monitoring device for natural gas pipeline |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928862A (en) * | 2016-04-19 | 2016-09-07 | 西南石油大学 | Monitoring device and monitoring method for on-line monitoring of corrosion degree of medium injected into gas-injection well |
| CN105909910A (en) * | 2016-06-24 | 2016-08-31 | 苏州热工研究院有限公司 | On-line rubber lining integrality monitoring system |
| CN105953018A (en) * | 2016-06-24 | 2016-09-21 | 苏州热工研究院有限公司 | Rubber-lining equipment corrosion online monitoring and control system |
| CN105909910B (en) * | 2016-06-24 | 2019-06-21 | 苏州热工研究院有限公司 | A kind of line with rubber integrality on-line monitoring system |
| CN105953018B (en) * | 2016-06-24 | 2019-06-25 | 苏州热工研究院有限公司 | A kind of rubber-lining equipment on-line corrosion monitoring and control system |
| CN110486630A (en) * | 2019-08-20 | 2019-11-22 | 西南石油大学 | Natural gas line corrosion default characteristic feature extracting method |
| CN110686165A (en) * | 2019-10-15 | 2020-01-14 | 西南石油大学 | Intelligent natural gas pipeline corrosion monitoring device |
| CN110702599A (en) * | 2019-11-08 | 2020-01-17 | 大连理工大学 | Multi-electrode top corrosion monitoring sensor, top corrosion monitoring experiment system and monitoring method |
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Application publication date: 20131211 |