CN109778198B - Strip magnesium anode anti-corrosion mounting structure in sleeve and corrosion degree detection method - Google Patents
Strip magnesium anode anti-corrosion mounting structure in sleeve and corrosion degree detection method Download PDFInfo
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- CN109778198B CN109778198B CN201910133186.0A CN201910133186A CN109778198B CN 109778198 B CN109778198 B CN 109778198B CN 201910133186 A CN201910133186 A CN 201910133186A CN 109778198 B CN109778198 B CN 109778198B
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- Prior art keywords
- pipeline
- sleeve
- metal strip
- mounting structure
- reference electrode
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 23
- 239000011777 magnesium Substances 0.000 title claims abstract description 23
- 238000005260 corrosion Methods 0.000 title claims abstract description 21
- 230000007797 corrosion Effects 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 title abstract description 5
- 238000012360 testing method Methods 0.000 claims description 89
- 229910052751 metal Inorganic materials 0.000 claims description 47
- 239000002184 metal Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 238000005536 corrosion prevention Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000003832 thermite Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 17
- 239000010426 asphalt Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a strip magnesium anode anti-corrosion mounting structure in a sleeve and a corrosion degree detection method.
Description
Technical Field
The invention belongs to the technical field of pipeline auxiliary equipment, and particularly relates to a strip magnesium anode anti-corrosion mounting structure in a sleeve and a corrosion degree detection method.
Background
At present, most of buried pipelines are made of carbon steel, the pipeline conveying distance is long, the soil environment is complex and changeable, the inner wall is free of anti-corrosion measures, and the outer wall is coated with an anti-corrosion coating of petroleum asphalt. Because the medium in the pipe is continuously corroded to the inner wall, the external soil is continuously corroded to the outer wall, the quality of part of the pipeline anticorrosive coating does not reach the design standard, the construction is not standard, the anticorrosive measure is not in place, and other factors, in the long-term operation process, each corrosion factor acts with the buried pipeline for a long time, so that the buried pipeline is seriously corroded, and especially the sleeve type structure has a gap between the pipeline and the outer sleeve, so that water is easy to enter, and the joint is more easily corroded.
Disclosure of Invention
The invention aims to provide a strip-shaped magnesium anode anti-corrosion mounting structure in a sleeve and a corrosion degree detection method.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a banded magnesium positive pole anticorrosion mounting structure in sleeve pipe, this sleeve pipe includes pipeline and cover establishes the outer tube in the pipeline outside, and this mounting structure is used for protecting the junction of pipeline and outer tube, and this mounting structure includes anodic metal strip, auxiliary test piece and reference electrode, and auxiliary test piece and reference electrode setting are in the same side of pipeline and between auxiliary test piece and the pipeline, anodic metal strip sets up between pipeline and outer tube and anodic metal strip evenly twine on the outer periphery of pipeline, digs directly over the pipeline and is equipped with the negative pole test well, and the internally mounted of negative pole test well has the testing box, and this testing box comprises a plurality of mutually independent wiring port, the outer tube is connected with wiring port A of testing box through test cable I, and the pipeline is connected with wiring port D of testing box through test cable II, and one of one end of anodic metal strip is connected with wiring port E of testing box through anodic cable I, and auxiliary test piece are connected with wiring port B of testing box through reference cable, and reference electrode are connected with wiring port C of testing box, and wherein, wiring port A of testing box is connected with wiring port E through the connection piece.
Further, a protective cover is arranged at the top end of the cathode test well.
Further, the anode metal strip is a strip-shaped magnesium anode.
Further, waterproof adhesive tapes are wound on the outer sides of the anode metal strips.
Further, the distance between the auxiliary test piece and the reference electrode is larger than the distance between the reference electrode and the pipeline.
Further, the distance between the auxiliary test piece and the reference electrode is 0.5m.
Further, the distance between the reference electrode and the outer sleeve is 0.3m.
The method for detecting the corrosion degree of the sleeve by using the strip magnesium anode anti-corrosion mounting structure in the sleeve comprises the following steps:
step one: opening a protective cover arranged at the top end of the cathode test well;
step two: adjusting the multimeter to a voltage range;
step three: two measuring ends of the universal meter are respectively inserted into wiring ports E and C of the test box, the potential difference U1 between the anode metal strip and the reference electrode is measured, and the loss condition of the anode metal strip can be judged according to the potential difference U1.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pipeline is protected by winding the anode metal strip such as the magnesium strip between the pipeline and the outer sleeve, then the auxiliary test piece and the reference electrode which are connected to the test box are arranged on one side of the pipeline, when the loss condition of the anode metal strip and whether the anode metal strip is installed in place or not are detected, the test box arranged in the cathode test well is measured by the universal meter, and the loss condition of the anode metal strip and whether the anode metal strip is installed in place or not can be obtained, so that the measuring method is simple and practical.
Drawings
FIG. 1 is a front view of a strip magnesium anode corrosion protection mounting structure within a sleeve;
FIG. 2 is a side view of a band-shaped magnesium anode corrosion protection mounting structure within a sleeve;
FIG. 3 is a schematic diagram of the structure of the cartridge of the present invention;
the marks in the figure: 1. pipeline, 101, outer tube, 2, auxiliary test piece, 3, positive pole metal strip, 4, reference electrode, 5, positive pole cable I, 6, negative pole test well, 7, the testing box, 8, test cable I, 9, auxiliary cable, 10, reference cable, 11, the connection piece, 12, visor, 13, waterproof sticky tape, 14, test cable II.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
As shown in fig. 1 and 2, the casing comprises a pipe 1 and an outer casing 101 sleeved outside the pipe 1, the installation structure is used for protecting the joint of the pipe and the outer casing, the installation structure comprises an anode metal strip 3, an auxiliary test piece 2 and a reference electrode 4, the auxiliary test piece 2 is made of the same material as the pipe 1, the reference electrode 4 is made of copper or copper sulfate, the reference electrode 4 has a constant potential, the potential is not influenced by soil, the potential can be preferably the same as that of the anode block 3, the anode metal strip 3 is a strip-shaped magnesium anode, preferably a strip-shaped magnesium strip, the auxiliary test piece 2 and the reference electrode 4 are arranged on the same side of the pipe 1, the reference electrode 4 is positioned between the auxiliary test piece 2 and the pipe 1, the anode metal strip 3 is arranged between the pipeline 1 and the outer sleeve 101, the anode metal strip 3 is uniformly wound on the outer circumference surface of the pipeline 1, a waterproof adhesive tape 13 is wound on the outer side of the anode metal strip 3, a cathode test well 6 is dug right above the pipeline 1, a protective cover 12 is arranged at the top end of the cathode test well 6, a test box 7 is arranged in the cathode test well 6, the test box 7 consists of a plurality of mutually independent wiring ports, the outer sleeve 101 is connected with the wiring port A of the test box 7 through a test cable I8, the pipeline 1 is connected with the wiring port D of the test box 7 through a test cable II 14, one end of the anode metal strip 3 is connected with the wiring port E of the test box 7 through an anode cable I5, an auxiliary test piece 2 is connected with the wiring port B of the test box 7 through an auxiliary cable 9, a reference electrode 4 is connected with the wiring port C of the test box 7 through a reference cable 10, as shown in fig. 3, the connection port a and the connection port E of the test box 7 are connected by a connection piece 11, and the connection piece 11 is a copper sheet.
Further optimizing the scheme, the distance between the auxiliary test piece 2 and the reference electrode 4 is larger than the distance between the reference electrode 4 and the pipeline 1. The distance between the auxiliary test piece 2 and the reference electrode 4 is 0.5m. The distance between the reference electrode 4 and the outer sleeve 101 is 0.3m.
The method for detecting the corrosion degree of the sleeve by using the strip magnesium anode anti-corrosion mounting structure in the sleeve comprises the following steps:
step one: opening a protective cover 12 arranged at the top end of the cathode test well 6;
step two: adjusting the multimeter to a voltage range;
step three: two measuring ends of the universal meter are respectively inserted into wiring ports E and C of the test box 7, the potential difference U1 between the anode metal strip 3 and the reference electrode 4 is measured, and the loss condition of the anode metal strip 3 can be judged according to the potential difference U1.
The following describes the winding method of the anode metal strip 3 in detail, the anode metal strip 3 is spirally wound and laid along the pipe 1, the iron core wire inside the anode metal strip 3 is welded with the pipe by thermite welding every 5.0 meters when the anode metal strip 3 is wound, and the distance between the two welding spots at the outermost side and the end part of the outer sleeve 101 is 0.3 meters. And then repairing the welding spots. The anode metal strips 3 are fixed by waterproof adhesive tapes 13 every 2.0 meters, and the positions of the two ends of the connecting part of the pipeline 1 and the outer sleeve 101 are sealed, so that water is prevented from entering the space between the inner sleeve and the outer sleeve to influence the anode metal strips 3.
The pipeline 1 and the outer sleeve 101 are insulated from each other, the inner wall of the outer sleeve 101, the anode metal strip 3 and the connecting sheet 11 form a protection loop, the part connected with the pipeline 1 is mainly used for testing the insulation condition between the pipeline 1 and the outer sleeve 101, and if the pipeline 1 is a steel pipe, the test cable I8 is directly welded on the pipeline 1; if the pipeline 1 is a reinforced concrete sleeve, the test cable is reliably welded with the main reinforcement in the pipeline 1, the welded junction is subjected to corrosion prevention treatment by asphalt after welding, when whether insulation is measured, the universal meter is adjusted to a voltage level, two measuring ends of the universal meter are respectively inserted into the wiring ports A and D, and if no potential difference is detected, incomplete insulation is indicated.
Further optimize this scheme, both sides at the pipeline are dug and are equipped with a plurality of inspection hole, have all buried two sets of inspection piece in every inspection hole, each has 18, wherein a set of inspection piece links to each other with pipeline 1 through the inspection cable, another set of inspection piece is not connected with pipeline 1, the size of inspection piece is 100mm x 50mm x 5mm, the material of inspection piece is the same with the material of pipeline 1, the inspection piece should adopt the machining preparation, if adopt the gas cutting sample, must remove the heat affected zone, the inspection piece is buried perpendicularly to ground, its center is in same elevation with pipeline center, the broadside is relative. The surface of the inspection sheet should not have obvious defects, such as pits, cracks, scratches, delamination and the like, and all edges of the inspection sheet should not have burrs. The surface roughness Ra of the inspection piece is 3.2 mu m, the quality of the weighed inspection piece is required to be accurate to 1mg, inspection staff can dig out the inspection piece in one inspection pit periodically, and the corrosion condition of the pipeline 1 is indirectly judged.
The connection part of the test cable I8 and the test cable II 14 with the pipeline 1 and the connection part of the auxiliary cable 9 and the auxiliary test piece 2 are welded by adopting double-point thermite welding, and after welding, the welding spots on the pipeline 1 are subjected to joint coating treatment, and the welding spots on the auxiliary test piece 2 are subjected to corrosion prevention treatment by asphalt.
The model numbers of the test cable I8 and the test cable II 14 are YJV 22 -0.6/1kV-2×10mm 2 The anode cable model is YJV 22 -0.6/1kV-1×10mm 2 All the cables should be provided with a cable label to indicate the use of the cable, and the junction box must be waterproof and sealed.
The invention adopts a cathode protection method of a sacrificial anode, the pipeline is protected by winding an anode metal strip such as a strip magnesium anode between the pipeline and an outer sleeve, then an auxiliary test piece and a reference electrode which are connected to a test box are arranged on one side of the pipeline, when the loss degree of the anode metal strip is required to be measured, a protective cover 12 arranged at the top end of a cathode test well 6 is opened, the loss condition of the anode metal strip 3 can be obtained by measuring a test box 7 arranged in the cathode test pile 6 through a universal meter, the specific measuring method is that the universal meter is adjusted to a voltage level, then two measuring ends of the universal meter are respectively inserted into a wiring port E and a wiring port C, the potential difference U1 between the anode metal strip 3 and the reference electrode 4 is measured, and the potential difference U1 is used for judging the loss condition of the anode metal strip 3.
If the anode metal strip 3 needs to be judged whether to be installed in place, after the test operation of the invention is carried out for a period of time, the connecting sheet 11 is disconnected, then two measuring ends of the universal meter are respectively inserted into the wiring ports B and C, the potential difference U2 between the auxiliary test piece 2 and the reference electrode 4 is measured, then two measuring ends of the universal meter are respectively inserted into the wiring ports D and C, the potential difference U3 between the pipeline 1 and the reference electrode 4 is measured, the potential difference U2 and the potential difference U3 are compared, if the potential difference U2 and the potential difference U3 are not greatly different, the anode metal strip 3 is not installed in place, and if the potential difference U2 and the potential difference U3 are greatly different, the anode metal strip 3 is installed in place.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a intraductal banded magnesium positive pole anticorrosion mounting structure of cover, this sleeve pipe includes pipeline (1) and cover establishes outer tube (101) in the pipeline (1) outside, and this mounting structure is used for protecting pipeline and outer tube's junction, its characterized in that: the mounting structure comprises an anode metal strip (3), an auxiliary test piece (2) and a reference electrode (4), wherein the auxiliary test piece (2) and the reference electrode (4) are arranged on the same side of a pipeline (1), the reference electrode (4) is positioned between the auxiliary test piece (2) and the pipeline (1), the anode metal strip (3) is arranged between the pipeline (1) and an outer sleeve (101) and uniformly winds the anode metal strip (3) on the outer circumferential surface of the pipeline (1), an iron core wire on the inner side of the anode metal strip (3) is welded with the pipeline (1) every 5 meters by thermite welding when the anode metal strip (3) is wound, the anode metal strip (3) is fixed by a waterproof adhesive tape (13), and sealing treatment is carried out at two end positions of the joint of the pipeline (1) and the outer sleeve (101);
dig directly over pipeline (1) and be equipped with negative pole test well (6), the internally mounted of negative pole test well (6) has testing box (7), and this testing box (7) are constituteed by the wiring port of a plurality of mutual independence, outer tube (101) are linked to each other with the wiring port A of testing box (7) through test cable I (8), pipeline (1) are linked to each other with the wiring port D of testing box (7) through test cable II (14), wherein one end of positive pole metal strip (3) is linked to each other with the wiring port E of testing box (7) through positive pole cable I (5), auxiliary test piece (2) are linked to each other with the wiring port B of testing box (7) through auxiliary cable (9), reference electrode (4) are linked to each other with the wiring port C of testing box (7) through reference cable (10), wherein, the wiring port A of testing box (7) is linked to each other with wiring port E through connection piece (11).
2. The in-sleeve strip magnesium anode corrosion prevention mounting structure according to claim 1, wherein: the top end of the cathode test well (6) is provided with a protective cover (12).
3. The in-sleeve strip magnesium anode corrosion prevention mounting structure according to claim 1, wherein: the anode metal strip (3) is a strip-shaped magnesium anode.
4. The in-sleeve strip magnesium anode corrosion prevention mounting structure according to claim 1, wherein: the distance between the auxiliary test piece (2) and the reference electrode (4) is larger than the distance between the reference electrode (4) and the pipeline (1).
5. The in-sleeve strip magnesium anode corrosion prevention mounting structure according to claim 4, wherein: the distance between the auxiliary test piece (2) and the reference electrode (4) is 0.5m.
6. The in-sleeve strip magnesium anode corrosion prevention mounting structure according to claim 4, wherein: the distance between the reference electrode (4) and the outer sleeve (101) is 0.3m.
7. A method for detecting the degree of corrosion of a sleeve using the in-sleeve strip magnesium anode corrosion prevention mounting structure according to any one of claims 1 to 6, characterized in that the method comprises the steps of:
step one: opening a protective cover (12) arranged at the top end of the cathode test well (6);
step two: adjusting the multimeter to a voltage range;
step three: two measuring ends of the universal meter are respectively inserted into wiring ports E and C of the test box (7), the potential difference U1 between the anode metal strip (3) and the reference electrode (4) is measured, and the loss condition of the anode metal strip (3) can be judged according to the size of the potential difference U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133186.0A CN109778198B (en) | 2019-02-22 | 2019-02-22 | Strip magnesium anode anti-corrosion mounting structure in sleeve and corrosion degree detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133186.0A CN109778198B (en) | 2019-02-22 | 2019-02-22 | Strip magnesium anode anti-corrosion mounting structure in sleeve and corrosion degree detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109778198A CN109778198A (en) | 2019-05-21 |
| CN109778198B true CN109778198B (en) | 2023-12-22 |
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| CN201910133186.0A Active CN109778198B (en) | 2019-02-22 | 2019-02-22 | Strip magnesium anode anti-corrosion mounting structure in sleeve and corrosion degree detection method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010067724A (en) * | 2001-03-13 | 2001-07-13 | 송용일 | Measurement apparatus for electric potential of pipe laying |
| CN201148467Y (en) * | 2008-01-21 | 2008-11-12 | 张宗旺 | Combined anode and cathode protection apparatus |
| CN104313598A (en) * | 2014-11-10 | 2015-01-28 | 天津亿利科能源科技发展股份有限公司 | Steel-structured multi-layer protective monitoring and emergency guaranteeing system and method in splashing region |
| CN107904600A (en) * | 2018-01-02 | 2018-04-13 | 重庆燃气集团股份有限公司 | A kind of cathodic protection system of buried metal pipeline and anode detecting system and method |
| CN208087751U (en) * | 2018-03-18 | 2018-11-13 | 华润（南京）市政设计有限公司 | A kind of sacrificial anode inbuilt steel buried pipeline anti-corrosive apparatus in groups |
| CN210030897U (en) * | 2019-02-22 | 2020-02-07 | 华润燃气（郑州）市政设计研究院有限公司 | Strip-shaped magnesium anode anti-corrosion mounting structure in sleeve |
-
2019
- 2019-02-22 CN CN201910133186.0A patent/CN109778198B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010067724A (en) * | 2001-03-13 | 2001-07-13 | 송용일 | Measurement apparatus for electric potential of pipe laying |
| CN201148467Y (en) * | 2008-01-21 | 2008-11-12 | 张宗旺 | Combined anode and cathode protection apparatus |
| CN104313598A (en) * | 2014-11-10 | 2015-01-28 | 天津亿利科能源科技发展股份有限公司 | Steel-structured multi-layer protective monitoring and emergency guaranteeing system and method in splashing region |
| CN107904600A (en) * | 2018-01-02 | 2018-04-13 | 重庆燃气集团股份有限公司 | A kind of cathodic protection system of buried metal pipeline and anode detecting system and method |
| CN208087751U (en) * | 2018-03-18 | 2018-11-13 | 华润（南京）市政设计有限公司 | A kind of sacrificial anode inbuilt steel buried pipeline anti-corrosive apparatus in groups |
| CN210030897U (en) * | 2019-02-22 | 2020-02-07 | 华润燃气（郑州）市政设计研究院有限公司 | Strip-shaped magnesium anode anti-corrosion mounting structure in sleeve |
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| CN109778198A (en) | 2019-05-21 |
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