CN2276026Y - Buried pipeline cathod protector - Google Patents
Buried pipeline cathod protector Download PDFInfo
- Publication number
- CN2276026Y CN2276026Y CN 96236220 CN96236220U CN2276026Y CN 2276026 Y CN2276026 Y CN 2276026Y CN 96236220 CN96236220 CN 96236220 CN 96236220 U CN96236220 U CN 96236220U CN 2276026 Y CN2276026 Y CN 2276026Y
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- Prior art keywords
- pipeline
- anode
- zonal
- anodes
- magnesium alloy
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Abstract
The utility model discloses a buried pipeline cathode protector which is composed of a buried long distance oil pipeline, and zonal sacrificial magnesium alloy anodes. The outer wall of a metal pipeline is provided with an anticorrosive coating; two zonal anodes in parallel are connected with a test pile cable arranged on the pipeline; the circumference of the zonal anodes are provided with filling material. The utility model is connected with the zonal sacrificial anodes provided with magnesium alloy by making use of the existing test pile arranged on the pipeline; a welding point does not need to be additionally arranged on the pipeline to efficiently avoid the harm that the existing anticorrosive coating of the pipeline is damaged. The utility model is laid with two zonal anodes in parallel; anode area is increased, and the quantity of the filling material is reduced by 50%. The buried pipeline cathode protector has the advantages of simple construction, low cost, and convenient application in large-scale industry.
Description
The utility model belongs to long cathodic protector apart from oil transportation (gas) metallic conduit anticorrosion technique field, particularly pipeline with burying.
Length can be subjected to soil corrosion inevitably apart from oil transportation (gas) metallic conduit with burying.Generally the anti-corrosion method of Cai Yonging is coating+galvanic protection.Galvanic protection can be divided into two big classes, and a class is an impressed current method, and another kind of is sacrificial anode protection, and the utility model belongs to the sacrificial anode law areas.Bar-shaped sacrificial anode is widely used in lower and the occasion that the required protective current of pipeline is less of soil resistivity.When soil resistivity is elevated to certain value; mountain area rock location for example; because movably ion is seldom in the soil; this form just can lose efficacy; so just arise at the historic moment with the ribbon anode of pipeline laying in one ditch; but inreal as yet industrial applications; only have near the oil pipeline in Beijing oil transportation company Fangshan and used; the purpose that adopts ribbon anode is to remedy under proteciton section of impressed current method and bar-shaped anodic; the length of ribbon anode is between 20-30 rice, and the protection effect is about every meter anodic protection 1 mitron road.In sum, ribbon anode really is not used for industrial use as yet, and subject matter is: 1, anode directly is welded on pipe surface by cable, will destroy corrosion protection coating at the solder joint place; 2, owing to be welded on pipe surface, test so can't carry out regular pipeline spontaneous potential, unfavorable to long-term pipeline management; 3, the anode filler follows bar-shaped anode filler, thereby and adopt single mode of connection to cause guard space short, cost is higher, large-scale industry is used be restricted.
The utility model is at the problems referred to above, proposes a kind of science, reliable, practical cathodic protector, adopts banded sacrificial magnesium alloy anode that pipeline is carried out galvanic protection.
The buried pipeline cathodic protector; form by burying ground long distance oil pipeline (1) and banded sacrificial magnesium alloy anode (2); metallic conduit (1) outer wall is provided with preservative coat (3); ribbon anode (2) is connected with detective pole (4) cable on the pipeline (1) with lead, and ribbon anode (2) is provided with on every side fills out construction materials contract (5).
Described ribbon anode (2) is that the double joint parallel way is connected with detective pole (4) cable of pipeline (1) simultaneously.
The utility model utilizes on the pipeline existing cathodic protection test pile to be connected and installed the banded sacrificial anode of magnesium alloy; can satisfy the pipeline cathode protection requirement fully; do not need on pipeline, to increase newly weld; effectively avoided the conventional anode connection welding frequent; and the harm of the former preservative coat of destruction pipeline; adopt the equidistant laying of the corresponding pipeline of banded sacrificial magnesium alloy anode to compare with conventional in the galvanic protection; the banded sacrificial magnesium alloy anode of the utility model double joint in parallel is laid; annode area increases; and fill out the construction materials contract consumption and reduce 50%; can overcome the deficiency of single connection in the prior art; both reduced engineering cost; overcome again because of an anode generation current unevenness causes local corrosion to open circuit when even, thereby caused protecting Problem of Failure.Sacrificial anode in the galvanic protection of changing over is to connect by welded pipe line; become and utilize square bolt connection on the pipeline detective pole; dismounting easily; when having overcome impressed current cathodic protection and sacrificial anode Combined Protection; can not test the drawback of spontaneous potential, electric current, voltage, bolt connecting mode has satisfied the needs of routine test spontaneous potential, outward current and voltage.By test data as seen, adopt the utility model, lay 1000 meters ribbon anode guard spaces and be extended down to 14-17KM, economic benefit is more than 10 times of prior art, and the utility model construction is simple, with low cost, is convenient to large-scale industrial application.
Describe the utility model embodiment in detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model structural representation.
Fig. 2 is the sectional view at A-A place among Fig. 1.
Banded sacrificial magnesium alloy anode to the type approval test of φ 377 buried pipeline galvanic protections between the second Liaocheng pumping plant φ of oil transportation management office, the 377 buried oil pipeline road 109#-110# detective poles of Huadong Oil Transport Administration Shandong; the protective layer of this pipeline section is a regular grade pitch; originally adopt the impressed current method galvanic protection; soil moisture content: 109#:20.6%; 110#:23.6%; soil resistivity: 110#:20.3 Ω .m, envrionment temperature :-2～4 ℃, pipeline protection layer insulation resistance:
104#-106# 4791Ωm
2 106#-107# 961Ωm
2
107#-108# 21Ωm
2 108#-109# 2426Ωm
2
109#-110# 763Ωm
2 110#-111# 1254Ωm
2
111#-112# 364Ωm
2 112#-113# 74Ωm
2
113#-114# 1348Ωm
2
The buried pipeline cathodic protector; form by burying ground long distance oil pipeline 1 and banded sacrificial magnesium alloy anode 2; metallic conduit 1 outer wall is provided with preservative coat 3; between the 1KM of 109#-110# detective pole 4; from the banded sacrificial magnesium alloy anode 2 of two 19*9.5mm of two stakes long 250m respectively in parallel; weight 330Kg, capacity 330A.h/m, open circuit potential-1.7v (Cu/CuSO
4), banded sacrificial magnesium alloy anode 2 and φ 377 oil pipelines are with the ditch parallel laid, for guaranteeing that the anode outward current is stable as far as possible and reducing anode grounding resistance, should around anode, add and fill out construction materials contract 5, it is by gypsum, the mixture of wilkinite and saltcake is formed, wherein gypsum can prevent effectively that anode surface from forming the bad tectum of conduction, and anode is evenly consumed, absorptive wilkinite can be kept the humidity around the anode and the moisture fluctuation of balanced soil, and saltcake can reduce the resistivity of filling out construction materials contract itself.
In order to verify that more accurately banded sacrificial magnesium alloy anode is to φ 377 buried pipeline galvanic protection type approval test protected datas.Pu faced completely the potentiostat of cathodic protection station and shuts down simultaneously on June 22nd, 1996, tested for the last time until June 28, and potentiostat is opened operation completely.Whole test result subordinate lists:
Afternoons 18 on June 22nd, 1996 point, after completely potentiostat is shut down, record banded sacrificial magnesium alloy anode protection potential the morning on the 24th:
121#-0.817V 120#-0.811V 119#-0.847V
118#-- 117#-0.878V 116#-0.867V
115#-- 114#-0.978V 113#-1.050V
112#-1.100V 111#-1.198V 110#-1.293V
109#-1.297V 108#-1.148V 107#-1.126V
106#-1.064V 105#-- 104#-0.948V
103#-0.927V 102#-0.908V 101#-0.877V
100#-0.835V
Wherein-0.85V, 17 kilometers.
The anode of naming a person for a particular job afternoon 17 on June 24th, 1996 disconnects, and records spontaneous potential the morning on the 26th.
121#-0.53V 120#-0.60V 119#-0.58V
118#-- 117#-0.55V 116#-0.53V
115#-- 114#-0.51V 113#-0.52V
112#-0.52V 111#-0.52V 110#-0.50V
109#-0.50V 108#-0.50V 107#-0.57V
106#-0.47V 105#-- 104#-0.49V
103#-0.46V 102#-0.48V 101#-0.49V
100#-0.46V
Anode grounding resistance: 1. 2. anode 0.2 Ω of anode 0.2 Ω
Anode open circuit potential: 1. 2. anode-1.756V of anode-1.676V
Anode closed circuit potential: 1. 2. anode-1.551V of anode-1.588V
Anode generation electric current: 1. 2. anode 820mA of anode 850mA
Connect banded sacrificial magnesium alloy anode, the banded sacrificial magnesium alloy anode protection potential of 15 surveys afternoon on the 28th afternoon on June 26th, 1996.
121#-0.72V 120#-0.74V 119#-0.75V
118#-- 117#-0.81V 116#-0.85V
115#-- 114#-0.92V 113#-1.00V
112#-1.12V 111#-1.15V 110#-1.25V
109#-1.24V 108#-1.13V 107#-1.10V
106#-1.03V 105#-- 104#-1.00V
103#-0.94V
109#+250 place anode grounding resistance is 2. 0.4 Ω of 0.4 Ω 1.
The anode open circuit potential 1.-the 1.676V anode 2.-1.605V
The anode closed circuit potential 1.-the 1.409V anode 2.-1.408V
Anode generation electric current is 2. 800mA of 830mA 1.
The cathodic protection potential that banded sacrificial magnesium alloy anode operation operation was surveyed after 20 hours is at 14 kilometers more than-0.85.
Claims (2)
1, buried pipeline cathodic protector; form by burying ground long distance oil pipeline (1) and banded sacrificial magnesium alloy anode (2); metallic conduit (1) outer wall is provided with preservative coat (3); it is characterized in that: ribbon anode (2) is connected with detective pole (4) cable on the pipeline (1) with lead, and ribbon anode (2) is provided with on every side fills out construction materials contract (5).
2, buried pipeline cathodic protector as claimed in claim 1 is characterized in that: ribbon anode (2) is connected with detective pole (4) cable of pipeline (1) for the double joint parallel way simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96236220 CN2276026Y (en) | 1996-08-16 | 1996-08-16 | Buried pipeline cathod protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96236220 CN2276026Y (en) | 1996-08-16 | 1996-08-16 | Buried pipeline cathod protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2276026Y true CN2276026Y (en) | 1998-03-11 |
Family
ID=33912092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96236220 Expired - Fee Related CN2276026Y (en) | 1996-08-16 | 1996-08-16 | Buried pipeline cathod protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2276026Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892486A (en) * | 2009-10-26 | 2010-11-24 | 上海青草沙投资建设发展有限公司 | Construction method of feed device for large-diameter pipeline for trenchless construction |
| CN101696757B (en) * | 2009-10-26 | 2011-09-21 | 中国科学院金属研究所 | Method for controlling pipeline outer wall corrosion of large caliber pipeline jacking construction |
| CN102912354A (en) * | 2011-10-24 | 2013-02-06 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN103273193A (en) * | 2013-06-07 | 2013-09-04 | 北京市燃气集团有限责任公司 | Long-bar type sacrificial anode welding tool and application method thereof |
| CN101696758B (en) * | 2009-10-26 | 2013-09-04 | 中国科学院金属研究所 | Corrosion control method of trenchless construction large diameter pipeline |
| CN103982752A (en) * | 2014-05-14 | 2014-08-13 | 中工武大设计研究有限公司 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
| CN104789969A (en) * | 2015-04-23 | 2015-07-22 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and replacement method thereof |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
| CN107725971A (en) * | 2017-10-20 | 2018-02-23 | 四川佳泰防腐绝缘材料有限公司 | A kind of immersion coating meshed anode electrochemical anti-corrosive pipeline |
| CN107763368A (en) * | 2017-10-20 | 2018-03-06 | 四川佳泰防腐绝缘材料有限公司 | A kind of electrochemical anti-corrosive pipeline |
| CN114836759A (en) * | 2021-02-01 | 2022-08-02 | 中国石油天然气股份有限公司 | Cathode protection device and cathode protection method for buried pipeline |
-
1996
- 1996-08-16 CN CN 96236220 patent/CN2276026Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696757B (en) * | 2009-10-26 | 2011-09-21 | 中国科学院金属研究所 | Method for controlling pipeline outer wall corrosion of large caliber pipeline jacking construction |
| CN101696758B (en) * | 2009-10-26 | 2013-09-04 | 中国科学院金属研究所 | Corrosion control method of trenchless construction large diameter pipeline |
| CN101892486A (en) * | 2009-10-26 | 2010-11-24 | 上海青草沙投资建设发展有限公司 | Construction method of feed device for large-diameter pipeline for trenchless construction |
| CN102995026B (en) * | 2011-10-24 | 2014-12-10 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN102912354A (en) * | 2011-10-24 | 2013-02-06 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN102995026A (en) * | 2011-10-24 | 2013-03-27 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN102912354B (en) * | 2011-10-24 | 2014-10-22 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN103273193A (en) * | 2013-06-07 | 2013-09-04 | 北京市燃气集团有限责任公司 | Long-bar type sacrificial anode welding tool and application method thereof |
| CN103982752A (en) * | 2014-05-14 | 2014-08-13 | 中工武大设计研究有限公司 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
| CN104789969A (en) * | 2015-04-23 | 2015-07-22 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and replacement method thereof |
| CN104789969B (en) * | 2015-04-23 | 2017-08-25 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and its replacing options |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
| CN107725971A (en) * | 2017-10-20 | 2018-02-23 | 四川佳泰防腐绝缘材料有限公司 | A kind of immersion coating meshed anode electrochemical anti-corrosive pipeline |
| CN107763368A (en) * | 2017-10-20 | 2018-03-06 | 四川佳泰防腐绝缘材料有限公司 | A kind of electrochemical anti-corrosive pipeline |
| CN114836759A (en) * | 2021-02-01 | 2022-08-02 | 中国石油天然气股份有限公司 | Cathode protection device and cathode protection method for buried pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |